commit 1c43cef4e51940bbc9aac82daed508fce9c5f502 Author: Nico Schottelius Date: Thu Feb 14 12:37:08 2019 +0100 Import tayga 0.9.2 (downloaded 2019-02-14) Signed-off-by: Nico Schottelius diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..d60c31a --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. And you must show them these terms so they know their +rights. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. 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Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. 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The Free Software Foundation may publish revised and/or new versions +of the General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + +Each version is given a distinguishing version number. If the Program +specifies a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..55fce24 --- /dev/null +++ b/Makefile.am @@ -0,0 +1,9 @@ +DEFS = -DTAYGA_CONF_PATH=\"$(tayga_conf_path)\" + +sbin_PROGRAMS = tayga + +dist_sysconf_DATA = tayga.conf.example + +dist_man_MANS = tayga.8 tayga.conf.5 + +tayga_SOURCES = nat64.c addrmap.c dynamic.c tayga.c conffile.c tayga.h list.h diff --git a/Makefile.in b/Makefile.in new file mode 100644 index 0000000..16d1d4e --- /dev/null +++ b/Makefile.in @@ -0,0 +1,756 @@ +# Makefile.in generated by automake 1.11.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, +# Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; 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It uses +the TUN driver to exchange packets with the kernel, which is the same driver +used by OpenVPN and QEMU/KVM. TAYGA needs no kernel patches or out-of-tree +modules, and it is compatible with all 2.4 and 2.6 kernels. + +If you're impatient and you know what stateless NAT64 is, you can skip to the +Installation & Basic Configuration section. + +------------------------------- +Stateless versus Stateful NAT64 +------------------------------- + +Most people are familiar with stateful NAT, which allows N:1 address mapping +by tracking TCP and UDP sessions and rewriting port numbers on each packet. +Most commonly this is used to translate sessions from multiple "internal" +hosts (which are numbered with private IPv4 addresses) onto a single global +IPv4 address on the NAT device's "external" interface. + +Stateless NAT does no such session tracking or port number rewriting. It +simply performs a 1:1 substitution of IP addresses using a mapping table +provided by the network administrator. For example, an organization whose +global address allocation was 198.51.100.0/24 but whose hosts were using +addresses in 192.0.2.0/24 could use a stateless NAT to rewrite 192.0.2.1 into +198.51.100.1, 192.0.2.35 into 198.51.100.35, etc, in the outbound direction, +and the reverse in the inbound direction. This is commonly done when an +organization moves to a new ISP and receives a new IPv4 address delegation of +the same size as their old delegation but does not want to renumber their +network. + +TAYGA and other stateless NAT64 translators operate in this fashion. When +translating packets between IPv4 and IPv6, the source and destination +addresses in the packet headers are substituted using a 1:1 mapping. This +means that, in order to exchange packets across the NAT64, each IPv4 host must +be represented by a unique IPv6 address, and each IPv6 host must be +represented by a unique IPv4 address. How this mapping is performed is +discussed in the next sections. + +In situations where stateful NAT64 is required, TAYGA can be used in +combination with a stateful IPv4 NAT such as the iptables MASQUERADE target. +This allows the administrator a great deal more flexibility than if stateful +NAT were implemented directly in TAYGA. + +---------------------- +Mapping IPv4 into IPv6 +---------------------- + +TAYGA maps IPv4 addresses into the IPv6 network according to RFC 6052. This +states that a 32-bit IPv4 address should be appended to a designated IPv6 +prefix, which we call the NAT64 prefix, and the resulting IPv6 address can be +used to contact the IPv4 host through the NAT64. + +The NAT64 prefix should be assigned out of a site's global IPv6 address +allocation. For example, if a site is allocated 2001:db8:1::/48, the prefix +2001:db8:1:ffff::/96 could be set aside for NAT64. (There are several options +for the length of the NAT64 prefix, but a /96 is recommended.) The IPv4 host +198.51.100.10 could then be accessed through the NAT64 using the address +2001:db8:1:ffff::c633:640a. Conveniently, it is possible to use the syntax +2001:db8:1:ffff::198.51.100.10 instead. + +RFC 6052 also specifies a Well-Known Prefix 64:ff9b::/96 which can be used for +NAT64 service rather than allocating a prefix from the site's IPv6 address +block. However, this comes with several restrictions, primarily that hosts +with private IPv4 addresses (10.x.x.x, 192.168.x.x, etc) cannot be accessed +through the NAT64. See RFC 6052 for more information. + +If NAT64 service is needed for only a few hosts instead of the entire IPv4 +address space, TAYGA can be configured without a NAT64 prefix, and address +maps can be assigned on a host-by-host basis. + +---------------------- +Mapping IPv6 into IPv4 +---------------------- + +Being a stateless NAT, TAYGA requires that a unique IPv4 address is assigned +to every IPv6 host that needs NAT64 service. This assignment can be done +statically by the network administrator, or dynamically by TAYGA from a pool +of IPv4 addresses designated for this purpose. + +Static address mapping is desirable for servers or other hosts requiring a +well-known address. Statically mapped addresses may be entered into DNS, for +example. + +Dynamic address mapping allows TAYGA to assign IPv4 addresses to IPv6 hosts as +they are needed. By default, these assignments are guaranteed to remain +usable for up to two hours after the last packet seen, but they are retained +for up to two weeks as long as the address pool does not become empty. +Assignments are written to disk so they persist through a restart of the TAYGA +daemon, allowing existing TCP and UDP sessions to continue uninterrupted. + +(Of course, TAYGA also supports the addressing architecture described in RFC +6052 in which IPv6 hosts are numbered with "IPv4-translatable IPv6 addresses" +carved out of the NAT64 prefix.) + +---------------------------------- +Installation & Basic Configuration +---------------------------------- + +TAYGA uses the GNU Automake/Autoconf system, which requires the `configure` +script to be run to generate the Makefile prior to building. The --prefix +and/or --sysconfdir options can be specified to the configure script to +specify the top-level installation path and tayga.conf file directory, +respectively. + +After unpacking the distribution tar.bz2 file, run: + + # ./configure && make && make install + +This will install the tayga executable in /usr/local/sbin/tayga and the sample +config file in /usr/local/etc/tayga.conf.example. + +Next, if you would like dynamic maps to be persistent between TAYGA restarts, +create a directory to store the dynamic.map file: + + # mkdir -p /var/db/tayga + +Now create your site-specific tayga.conf configuration file. The installed +tayga.conf.example file can be copied to tayga.conf and modified to suit your +site. Here is a sample minimal configuration: + + tun-device nat64 + ipv4-addr 192.168.255.1 + prefix 2001:db8:1:ffff::/96 # replace with a prefix from + # your site's address range + dynamic-pool 192.168.255.0/24 + data-dir /var/db/tayga # omit if you do not need persistent + # dynamic address maps + +Before starting the TAYGA daemon, the routing setup on your system will need +to be changed to send IPv4 and IPv6 packets to TAYGA. First create the TUN +network interface: + + # tayga --mktun + +If TAYGA prints any errors, you will need to fix your config file before +continuing. Otherwise, the new nat64 interface can be configured and the +proper routes can be added to your system: + + # ip link set nat64 up + # ip addr add 2001:db8:1::1 dev nat64 # replace with your router's address + # ip addr add 192.168.0.1 dev nat64 # replace with your router's address + # ip route add 2001:db8:1:ffff::/96 dev nat64 # from tayga.conf + # ip route add 192.168.255.0/24 dev nat64 # from tayga.conf + +Firewalling your NAT64 prefix from outside access is highly recommended: + + # ip6tables -A FORWARD -s 2001:db8:1::/48 -d 2001:db8:1:ffff::/96 -j ACCEPT + # ip6tables -A FORWARD -d 2001:db8:1:ffff::/96 -j DROP + +At this point, you may start the tayga process: + + # tayga + +Check your system log (/var/log/syslog or /var/log/messages) for status +information. + +If you are having difficulty configuring TAYGA, use the -d option to run the +tayga process in the foreground and send all log messages to stdout: + + # tayga -d diff --git a/aclocal.m4 b/aclocal.m4 new file mode 100644 index 0000000..e9b7b28 --- /dev/null +++ b/aclocal.m4 @@ -0,0 +1,951 @@ +# generated automatically by aclocal 1.11.1 -*- Autoconf -*- + +# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, +# 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +m4_ifndef([AC_AUTOCONF_VERSION], + [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl +m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.65],, +[m4_warning([this file was generated for autoconf 2.65. +You have another version of autoconf. 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We just wanted to have am__tar + # and am__untar set. + test -n "${am_cv_prog_tar_$1}" && break + + # tar/untar a dummy directory, and stop if the command works + rm -rf conftest.dir + mkdir conftest.dir + echo GrepMe > conftest.dir/file + AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar]) + rm -rf conftest.dir + if test -s conftest.tar; then + AM_RUN_LOG([$am__untar /dev/null 2>&1 && break + fi +done +rm -rf conftest.dir + +AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool]) +AC_MSG_RESULT([$am_cv_prog_tar_$1])]) +AC_SUBST([am__tar]) +AC_SUBST([am__untar]) +]) # _AM_PROG_TAR + diff --git a/addrmap.c b/addrmap.c new file mode 100644 index 0000000..7a4bf8b --- /dev/null +++ b/addrmap.c @@ -0,0 +1,631 @@ +/* + * addrmap.c -- address mapping routines + * + * part of TAYGA + * Copyright (C) 2010 Nathan Lutchansky + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include + +extern struct config *gcfg; +extern time_t now; + +int validate_ip4_addr(const struct in_addr *a) +{ + /* First octet == 0 */ + if (!(a->s_addr & htonl(0xff000000))) + return -1; + + /* First octet == 127 */ + if ((a->s_addr & htonl(0xff000000)) == htonl(0x7f000000)) + return -1; + + /* Link-local block 169.254.0.0/16 */ + if ((a->s_addr & htonl(0xffff0000)) == htonl(0xa9fe0000)) + return -1; + + /* Class D & E */ + if ((a->s_addr & htonl(0xe0000000)) == htonl(0xe0000000)) + return -1; + + return 0; +} + +int validate_ip6_addr(const struct in6_addr *a) +{ + /* Well-known prefix for NAT64 */ + if (a->s6_addr32[0] == WKPF && !a->s6_addr32[1] && !a->s6_addr32[2]) + return 0; + + /* Reserved per RFC 2373 */ + if (!a->s6_addr[0]) + return -1; + + /* Multicast addresses */ + if (a->s6_addr[0] == 0xff) + return -1; + + /* Link-local unicast addresses */ + if ((a->s6_addr16[0] & htons(0xffc0)) == htons(0xfe80)) + return -1; + + return 0; +} + +int is_private_ip4_addr(const struct in_addr *a) +{ + /* 10.0.0.0/8 */ + if ((a->s_addr & htonl(0xff000000)) == htonl(0x0a000000)) + return -1; + + /* 172.16.0.0/12 */ + if ((a->s_addr & htonl(0xfff00000)) == htonl(0xac100000)) + return -1; + + /* 192.0.2.0/24 */ + if ((a->s_addr & htonl(0xffffff00)) == htonl(0xc0000200)) + return -1; + + /* 192.168.0.0/16 */ + if ((a->s_addr & htonl(0xffff0000)) == htonl(0xc0a80000)) + return -1; + + /* 198.18.0.0/15 */ + if ((a->s_addr & htonl(0xfffe0000)) == htonl(0xc6120000)) + return -1; + + /* 198.51.100.0/24 */ + if ((a->s_addr & htonl(0xffffff00)) == htonl(0xc6336400)) + return -1; + + /* 203.0.113.0/24 */ + if ((a->s_addr & htonl(0xffffff00)) == htonl(0xcb007100)) + return -1; + + return 0; +} + +int calc_ip4_mask(struct in_addr *mask, const struct in_addr *addr, int len) +{ + mask->s_addr = htonl(~((1 << (32 - len)) - 1)); + if (addr && (addr->s_addr & ~mask->s_addr)) + return -1; + return 0; + +} + +int calc_ip6_mask(struct in6_addr *mask, const struct in6_addr *addr, int len) +{ + if (len > 32) { + mask->s6_addr32[0] = ~0; + if (len > 64) { + mask->s6_addr32[1] = ~0; + if (len > 96) { + mask->s6_addr32[2] = ~0; + mask->s6_addr32[3] = + htonl(~((1 << (128 - len)) - 1)); + } else { + mask->s6_addr32[2] = + htonl(~((1 << (96 - len)) - 1)); + mask->s6_addr32[3] = 0; + } + } else { + mask->s6_addr32[1] = htonl(~((1 << (64 - len)) - 1)); + mask->s6_addr32[2] = 0; + mask->s6_addr32[3] = 0; + } + } else { + mask->s6_addr32[0] = htonl(~((1 << (32 - len)) - 1)); + mask->s6_addr32[1] = 0; + mask->s6_addr32[2] = 0; + mask->s6_addr32[3] = 0; + } + if (!addr) + return 0; + if ((addr->s6_addr32[0] & ~mask->s6_addr32[0]) || + (addr->s6_addr32[1] & ~mask->s6_addr32[1]) || + (addr->s6_addr32[2] & ~mask->s6_addr32[2]) || + (addr->s6_addr32[3] & ~mask->s6_addr32[3])) + return -1; + return 0; +} + +static uint32_t hash_ip4(const struct in_addr *addr4) +{ + return ((uint32_t)(addr4->s_addr * + gcfg->rand[0])) >> (32 - gcfg->hash_bits); +} + +static uint32_t hash_ip6(const struct in6_addr *addr6) +{ + uint32_t h; + + h = ((uint32_t)addr6->s6_addr16[0] + gcfg->rand[0]) * + ((uint32_t)addr6->s6_addr16[1] + gcfg->rand[1]); + h ^= ((uint32_t)addr6->s6_addr16[2] + gcfg->rand[2]) * + ((uint32_t)addr6->s6_addr16[3] + gcfg->rand[3]); + h ^= ((uint32_t)addr6->s6_addr16[4] + gcfg->rand[4]) * + ((uint32_t)addr6->s6_addr16[5] + gcfg->rand[5]); + h ^= ((uint32_t)addr6->s6_addr16[6] + gcfg->rand[6]) * + ((uint32_t)addr6->s6_addr16[7] + gcfg->rand[7]); + return h >> (32 - gcfg->hash_bits); +} + +static void add_to_hash_table(struct cache_entry *c, uint32_t hash4, + uint32_t hash6) +{ + list_add(&c->hash4, &gcfg->hash_table4[hash4]); + list_add(&c->hash6, &gcfg->hash_table6[hash6]); +} + +void create_cache(void) +{ + int i, hash_size = 1 << gcfg->hash_bits; + struct list_head *entry; + struct cache_entry *c; + + if (gcfg->hash_table4) { + free(gcfg->hash_table4); + free(gcfg->hash_table6); + } + + gcfg->hash_table4 = (struct list_head *) + malloc(hash_size * sizeof(struct list_head)); + gcfg->hash_table6 = (struct list_head *) + malloc(hash_size * sizeof(struct list_head)); + if (!gcfg->hash_table4 || !gcfg->hash_table6) { + slog(LOG_CRIT, "unable to allocate %d bytes for hash table\n", + hash_size * sizeof(struct list_head)); + exit(1); + } + for (i = 0; i < hash_size; ++i) { + INIT_LIST_HEAD(&gcfg->hash_table4[i]); + INIT_LIST_HEAD(&gcfg->hash_table6[i]); + } + + if (list_empty(&gcfg->cache_pool) && list_empty(&gcfg->cache_active)) { + c = calloc(gcfg->cache_size, sizeof(struct cache_entry)); + for (i = 0; i < gcfg->cache_size; ++i) { + INIT_LIST_HEAD(&c->list); + INIT_LIST_HEAD(&c->hash4); + INIT_LIST_HEAD(&c->hash6); + list_add_tail(&c->list, &gcfg->cache_pool); + ++c; + } + } else { + list_for_each(entry, &gcfg->cache_active) { + c = list_entry(entry, struct cache_entry, list); + INIT_LIST_HEAD(&c->hash4); + INIT_LIST_HEAD(&c->hash6); + add_to_hash_table(c, hash_ip4(&c->addr4), + hash_ip6(&c->addr6)); + } + } +} + +static struct cache_entry *cache_insert(const struct in_addr *addr4, + const struct in6_addr *addr6, + uint32_t hash4, uint32_t hash6) +{ + struct cache_entry *c; + + if (list_empty(&gcfg->cache_pool)) + return NULL; + c = list_entry(gcfg->cache_pool.next, struct cache_entry, list); + c->addr4 = *addr4; + c->addr6 = *addr6; + c->last_use = now; + c->flags = 0; + c->ip4_ident = 1; + list_add(&c->list, &gcfg->cache_active); + add_to_hash_table(c, hash4, hash6); + return c; +} + +struct map4 *find_map4(const struct in_addr *addr4) +{ + struct list_head *entry; + struct map4 *m; + + list_for_each(entry, &gcfg->map4_list) { + m = list_entry(entry, struct map4, list); + if (m->addr.s_addr == (m->mask.s_addr & addr4->s_addr)) + return m; + } + return NULL; +} + +struct map6 *find_map6(const struct in6_addr *addr6) +{ + struct list_head *entry; + struct map6 *m; + + list_for_each(entry, &gcfg->map6_list) { + m = list_entry(entry, struct map6, list); + if (IN6_IS_IN_NET(addr6, &m->addr, &m->mask)) + return m; + } + return NULL; +} + +int insert_map4(struct map4 *m, struct map4 **conflict) +{ + struct list_head *entry; + struct map4 *s; + + list_for_each(entry, &gcfg->map4_list) { + s = list_entry(entry, struct map4, list); + if (s->prefix_len < m->prefix_len) + break; + if (s->prefix_len == m->prefix_len && + s->addr.s_addr == m->addr.s_addr) + goto conflict; + } + list_add_tail(&m->list, entry); + return 0; + +conflict: + if (conflict) + *conflict = s; + return -1; +} + +int insert_map6(struct map6 *m, struct map6 **conflict) +{ + struct list_head *entry, *insert_pos = NULL; + struct map6 *s; + + list_for_each(entry, &gcfg->map6_list) { + s = list_entry(entry, struct map6, list); + if (s->prefix_len < m->prefix_len) { + if (IN6_IS_IN_NET(&m->addr, &s->addr, &s->mask)) + goto conflict; + if (!insert_pos) + insert_pos = entry; + } else { + if (IN6_IS_IN_NET(&s->addr, &m->addr, &m->mask)) + goto conflict; + } + } + list_add_tail(&m->list, insert_pos ? insert_pos : &gcfg->map6_list); + return 0; + +conflict: + if (conflict) + *conflict = s; + return -1; +} + +int append_to_prefix(struct in6_addr *addr6, const struct in_addr *addr4, + const struct in6_addr *prefix, int prefix_len) +{ + switch (prefix_len) { + case 32: + addr6->s6_addr32[0] = prefix->s6_addr32[0]; + addr6->s6_addr32[1] = addr4->s_addr; + addr6->s6_addr32[2] = 0; + addr6->s6_addr32[3] = 0; + return 0; + case 40: + addr6->s6_addr32[0] = prefix->s6_addr32[0]; +#if __BYTE_ORDER == __BIG_ENDIAN + addr6->s6_addr32[1] = prefix->s6_addr32[1] | + (addr4->s_addr >> 8); + addr6->s6_addr32[2] = (addr4->s_addr << 16) & 0x00ff0000; +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN + addr6->s6_addr32[1] = prefix->s6_addr32[1] | + (addr4->s_addr << 8); + addr6->s6_addr32[2] = (addr4->s_addr >> 16) & 0x0000ff00; +# endif +#endif + addr6->s6_addr32[3] = 0; + return 0; + case 48: + addr6->s6_addr32[0] = prefix->s6_addr32[0]; +#if __BYTE_ORDER == __BIG_ENDIAN + addr6->s6_addr32[1] = prefix->s6_addr32[1] | + (addr4->s_addr >> 16); + addr6->s6_addr32[2] = (addr4->s_addr << 8) & 0x00ffff00; +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN + addr6->s6_addr32[1] = prefix->s6_addr32[1] | + (addr4->s_addr << 16); + addr6->s6_addr32[2] = (addr4->s_addr >> 8) & 0x00ffff00; +# endif +#endif + addr6->s6_addr32[3] = 0; + return 0; + case 56: + addr6->s6_addr32[0] = prefix->s6_addr32[0]; +#if __BYTE_ORDER == __BIG_ENDIAN + addr6->s6_addr32[1] = prefix->s6_addr32[1] | + (addr4->s_addr >> 24); + addr6->s6_addr32[2] = addr4->s_addr & 0x00ffffff; +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN + addr6->s6_addr32[1] = prefix->s6_addr32[1] | + (addr4->s_addr << 24); + addr6->s6_addr32[2] = addr4->s_addr & 0xffffff00; +# endif +#endif + addr6->s6_addr32[3] = 0; + return 0; + case 64: + addr6->s6_addr32[0] = prefix->s6_addr32[0]; + addr6->s6_addr32[1] = prefix->s6_addr32[1]; +#if __BYTE_ORDER == __BIG_ENDIAN + addr6->s6_addr32[2] = addr4->s_addr >> 8; + addr6->s6_addr32[3] = addr4->s_addr << 24; +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN + addr6->s6_addr32[2] = addr4->s_addr << 8; + addr6->s6_addr32[3] = addr4->s_addr >> 24; +# endif +#endif + return 0; + case 96: + if (prefix->s6_addr32[0] == WKPF && + is_private_ip4_addr(addr4)) + return -1; + addr6->s6_addr32[0] = prefix->s6_addr32[0]; + addr6->s6_addr32[1] = prefix->s6_addr32[1]; + addr6->s6_addr32[2] = prefix->s6_addr32[2]; + addr6->s6_addr32[3] = addr4->s_addr; + return 0; + default: + return -1; + } +} + +int map_ip4_to_ip6(struct in6_addr *addr6, const struct in_addr *addr4, + struct cache_entry **c_ptr) +{ + uint32_t hash; + struct list_head *entry; + struct cache_entry *c; + struct map4 *map4; + struct map_static *s; + struct map_dynamic *d = NULL; + + if (gcfg->cache_size) { + hash = hash_ip4(addr4); + + list_for_each(entry, &gcfg->hash_table4[hash]) { + c = list_entry(entry, struct cache_entry, hash4); + if (addr4->s_addr == c->addr4.s_addr) { + *addr6 = c->addr6; + c->last_use = now; + if (c_ptr) + *c_ptr = c; + return 0; + } + } + } + + map4 = find_map4(addr4); + + if (!map4) + return -1; + + switch (map4->type) { + case MAP_TYPE_STATIC: + s = container_of(map4, struct map_static, map4); + *addr6 = s->map6.addr; + break; + case MAP_TYPE_RFC6052: + s = container_of(map4, struct map_static, map4); + if (append_to_prefix(addr6, addr4, &s->map6.addr, + s->map6.prefix_len) < 0) + return -1; + break; + case MAP_TYPE_DYNAMIC_POOL: + return -1; + case MAP_TYPE_DYNAMIC_HOST: + d = container_of(map4, struct map_dynamic, map4); + *addr6 = d->map6.addr; + d->last_use = now; + break; + default: + return -1; + } + + if (gcfg->cache_size) { + c = cache_insert(addr4, addr6, hash, hash_ip6(addr6)); + + if (c_ptr) + *c_ptr = c; + if (d) { + d->cache_entry = c; + if (c) + c->flags |= CACHE_F_REP_AGEOUT; + } + } + + return 0; +} + +static int extract_from_prefix(struct in_addr *addr4, + const struct in6_addr *addr6, int prefix_len) +{ + switch (prefix_len) { + case 32: + if (addr6->s6_addr32[2] || addr6->s6_addr32[3]) + return -1; + addr4->s_addr = addr6->s6_addr32[1]; + break; + case 40: + if (addr6->s6_addr32[2] & htonl(0xff00ffff) || + addr6->s6_addr32[3]) + return -1; +#if __BYTE_ORDER == __BIG_ENDIAN + addr4->s_addr = (addr6->s6_addr32[1] << 8) | addr6->s6_addr[9]; +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN + addr4->s_addr = (addr6->s6_addr32[1] >> 8) | + (addr6->s6_addr32[2] << 16); +# endif +#endif + break; + case 48: + if (addr6->s6_addr32[2] & htonl(0xff0000ff) || + addr6->s6_addr32[3]) + return -1; +#if __BYTE_ORDER == __BIG_ENDIAN + addr4->s_addr = (addr6->s6_addr16[3] << 16) | + (addr6->s6_addr32[2] >> 8); +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN + addr4->s_addr = addr6->s6_addr16[3] | + (addr6->s6_addr32[2] << 8); +# endif +#endif + break; + case 56: + if (addr6->s6_addr[8] || addr6->s6_addr32[3]) + return -1; +#if __BYTE_ORDER == __BIG_ENDIAN + addr4->s_addr = (addr6->s6_addr[7] << 24) | + addr6->s6_addr32[2]; +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN + addr4->s_addr = addr6->s6_addr[7] | + addr6->s6_addr32[2]; +# endif +#endif + break; + case 64: + if (addr6->s6_addr[8] || + addr6->s6_addr32[3] & htonl(0x00ffffff)) + return -1; +#if __BYTE_ORDER == __BIG_ENDIAN + addr4->s_addr = (addr6->s6_addr32[2] << 8) | + addr6->s6_addr[12]; +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN + addr4->s_addr = (addr6->s6_addr32[2] >> 8) | + (addr6->s6_addr32[3] << 24); +# endif +#endif + break; + case 96: + addr4->s_addr = addr6->s6_addr32[3]; + break; + default: + return -1; + } + return validate_ip4_addr(addr4); +} + +int map_ip6_to_ip4(struct in_addr *addr4, const struct in6_addr *addr6, + struct cache_entry **c_ptr, int dyn_alloc) +{ + uint32_t hash; + struct list_head *entry; + struct cache_entry *c; + struct map6 *map6; + struct map_static *s; + struct map_dynamic *d = NULL; + + if (gcfg->cache_size) { + hash = hash_ip6(addr6); + + list_for_each(entry, &gcfg->hash_table6[hash]) { + c = list_entry(entry, struct cache_entry, hash6); + if (IN6_ARE_ADDR_EQUAL(addr6, &c->addr6)) { + *addr4 = c->addr4; + c->last_use = now; + if (c_ptr) + *c_ptr = c; + return 0; + } + } + } + + map6 = find_map6(addr6); + + if (!map6) { + if (dyn_alloc) + map6 = assign_dynamic(addr6); + if (!map6) + return -1; + } + + switch (map6->type) { + case MAP_TYPE_STATIC: + s = container_of(map6, struct map_static, map6); + *addr4 = s->map4.addr; + break; + case MAP_TYPE_RFC6052: + if (extract_from_prefix(addr4, addr6, map6->prefix_len) < 0) + return -1; + if (map6->addr.s6_addr32[0] == WKPF && + is_private_ip4_addr(addr4)) + return -1; + s = container_of(map6, struct map_static, map6); + if (find_map4(addr4) != &s->map4) + return -1; + break; + case MAP_TYPE_DYNAMIC_HOST: + d = container_of(map6, struct map_dynamic, map6); + *addr4 = d->map4.addr; + d->last_use = now; + break; + default: + return -1; + } + + if (gcfg->cache_size) { + c = cache_insert(addr4, addr6, hash_ip4(addr4), hash); + + if (c_ptr) + *c_ptr = c; + if (d) { + d->cache_entry = c; + if (c) + c->flags |= CACHE_F_REP_AGEOUT; + } + } + + return 0; +} + +static void report_ageout(struct cache_entry *c) +{ + struct map4 *m4; + struct map_dynamic *d; + + m4 = find_map4(&c->addr4); + if (!m4 || m4->type != MAP_TYPE_DYNAMIC_HOST) + return; + d = container_of(m4, struct map_dynamic, map4); + d->last_use = c->last_use; + d->cache_entry = NULL; +} + +void addrmap_maint(void) +{ + struct list_head *entry, *next; + struct cache_entry *c; + + list_for_each_safe(entry, next, &gcfg->cache_active) { + c = list_entry(entry, struct cache_entry, list); + if (c->last_use + CACHE_MAX_AGE < now) { + if (c->flags & CACHE_F_REP_AGEOUT) + report_ageout(c); + list_add(&c->list, &gcfg->cache_pool); + list_del(&c->hash4); + list_del(&c->hash6); + } + } +} diff --git a/conffile.c b/conffile.c new file mode 100644 index 0000000..ec6433c --- /dev/null +++ b/conffile.c @@ -0,0 +1,492 @@ +/* + * conffile.c -- config file parser + * + * part of TAYGA + * Copyright (C) 2010 Nathan Lutchansky + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include + +struct config *gcfg; + +static int parse_prefix(int af, const char *src, void *prefix, int *prefix_len) +{ + char *p, *end; + long int a; + int r; + + p = strchr(src, '/'); + if (!p) + return -1; + *p = 0; + a = strtol(p + 1, &end, 10); + r = *end || !inet_pton(af, src, prefix); + *p = '/'; + if (r) + return -1; + if (a < 0 || a > (af == AF_INET6 ? 128 : 32)) + return -1; + + *prefix_len = a; + return 0; +} + +static struct map_static *alloc_map_static(int ln) +{ + struct map_static *m; + + m = (struct map_static *)malloc(sizeof(struct map_static)); + if (!m) { + slog(LOG_CRIT, "Unable to allocate config memory\n"); + exit(1); + } + memset(m, 0, sizeof(struct map_static)); + m->map4.type = MAP_TYPE_STATIC; + m->map4.prefix_len = 32; + calc_ip4_mask(&m->map4.mask, NULL, 32); + INIT_LIST_HEAD(&m->map4.list); + m->map6.type = MAP_TYPE_STATIC; + m->map6.prefix_len = 128; + calc_ip6_mask(&m->map6.mask, NULL, 128); + INIT_LIST_HEAD(&m->map6.list); + m->conffile_lineno = ln; + return m; +} + +static void abort_on_conflict4(char *msg, int ln, struct map4 *old) +{ + char oldaddr[INET_ADDRSTRLEN]; + char oldline[128] = ""; + struct map_static *s; + + if (old->type == MAP_TYPE_STATIC || old->type == MAP_TYPE_RFC6052) { + s = container_of(old, struct map_static, map4); + if (s->conffile_lineno) + sprintf(oldline, " from line %d", s->conffile_lineno); + } + + inet_ntop(AF_INET, &old->addr, oldaddr, sizeof(oldaddr)); + if (ln) + slog(LOG_CRIT, "%s on line %d conflicts with earlier " + "definition of %s/%d%s\n", msg, ln, + oldaddr, old->prefix_len, oldline); + else + slog(LOG_CRIT, "%s conflicts with earlier " + "definition of %s/%d%s\n", msg, + oldaddr, old->prefix_len, oldline); + exit(1); +} + +static void abort_on_conflict6(char *msg, int ln, struct map6 *old) +{ + char oldaddr[INET6_ADDRSTRLEN]; + char oldline[128] = ""; + struct map_static *s; + + if (old->type == MAP_TYPE_STATIC || old->type == MAP_TYPE_RFC6052) { + s = container_of(old, struct map_static, map6); + if (s->conffile_lineno) + sprintf(oldline, " from line %d", s->conffile_lineno); + } + + inet_ntop(AF_INET6, &old->addr, oldaddr, sizeof(oldaddr)); + if (ln) + slog(LOG_CRIT, "%s on line %d overlaps with earlier " + "definition of %s/%d%s\n", msg, ln, + oldaddr, old->prefix_len, oldline); + else + slog(LOG_CRIT, "%s overlaps with earlier " + "definition of %s/%d%s\n", msg, + oldaddr, old->prefix_len, oldline); + exit(1); +} + +static void config_ipv4_addr(int ln, int arg_count, char **args) +{ + if (gcfg->local_addr4.s_addr) { + slog(LOG_CRIT, "Error: duplicate ipv4-addr directive on " + "line %d\n", ln); + exit(1); + } + if (!inet_pton(AF_INET, args[0], &gcfg->local_addr4)) { + slog(LOG_CRIT, "Expected an IPv4 address but found \"%s\" on " + "line %d\n", args[0], ln); + exit(1); + } + if (validate_ip4_addr(&gcfg->local_addr4) < 0) { + slog(LOG_CRIT, "Cannot use reserved address %s in ipv4-addr " + "directive, aborting...\n", args[0]); + exit(1); + } +} + +static void config_ipv6_addr(int ln, int arg_count, char **args) +{ + if (gcfg->local_addr6.s6_addr[0]) { + slog(LOG_CRIT, "Error: duplicate ipv6-addr directive on line " + "%d\n", ln); + exit(1); + } + if (!inet_pton(AF_INET6, args[0], &gcfg->local_addr6)) { + slog(LOG_CRIT, "Expected an IPv6 address but found \"%s\" on " + "line %d\n", args[0], ln); + exit(1); + } + if (validate_ip6_addr(&gcfg->local_addr6) < 0) { + slog(LOG_CRIT, "Cannot use reserved address %s in ipv6-addr " + "directive, aborting...\n", args[0]); + exit(1); + } + if (gcfg->local_addr6.s6_addr32[0] == WKPF) { + slog(LOG_CRIT, "Error: ipv6-addr directive cannot contain an " + "address in the Well-Known Prefix " + "(64:ff9b::/96)\n"); + exit(1); + } +} + +static void config_prefix(int ln, int arg_count, char **args) +{ + struct map_static *m; + struct map6 *m6; + + m = alloc_map_static(ln); + m->map4.prefix_len = 0; + m->map4.mask.s_addr = 0; + m->map4.type = MAP_TYPE_RFC6052; + m->map6.type = MAP_TYPE_RFC6052; + m6 = &m->map6; + + if (parse_prefix(AF_INET6, args[0], &m6->addr, &m6->prefix_len) || + calc_ip6_mask(&m6->mask, &m6->addr, m6->prefix_len)) { + slog(LOG_CRIT, "Expected an IPv6 prefix but found \"%s\" on " + "line %d\n", args[0], ln); + exit(1); + } + if (validate_ip6_addr(&m6->addr) < 0) { + slog(LOG_CRIT, "Cannot use reserved address %s in prefix " + "directive, aborting...\n", args[0]); + exit(1); + } + if (m6->prefix_len != 32 && m6->prefix_len != 40 && + m6->prefix_len != 48 && m6->prefix_len != 56 && + m6->prefix_len != 64 && m6->prefix_len != 96) { + slog(LOG_CRIT, "NAT prefix length must be 32, 40, 48, 56, 64 " + "or 96 only, aborting...\n"); + exit(1); + } + if (insert_map4(&m->map4, NULL) < 0) { + slog(LOG_CRIT, "Error: duplicate prefix directive on line %d\n", + ln); + exit(1); + } + if (insert_map6(&m->map6, &m6) < 0) + abort_on_conflict6("Error: NAT64 prefix", ln, m6); +} + +static void config_tun_device(int ln, int arg_count, char **args) +{ + if (gcfg->tundev[0]) { + slog(LOG_CRIT, "Error: duplicate tun-device directive on line " + "%d\n", ln); + exit(1); + } + if (strlen(args[0]) + 1 > sizeof(gcfg->tundev)) { + slog(LOG_CRIT, "Device name \"%s\" is invalid on line %d\n", + args[0], ln); + exit(1); + } + strcpy(gcfg->tundev, args[0]); +} + +static void config_map(int ln, int arg_count, char **args) +{ + struct map_static *m; + struct map4 *m4; + struct map6 *m6; + + m = alloc_map_static(ln); + + if (!inet_pton(AF_INET, args[0], &m->map4.addr)) { + slog(LOG_CRIT, "Expected an IPv4 address but found \"%s\" on " + "line %d\n", args[0], ln); + exit(1); + } + if (!inet_pton(AF_INET6, args[1], &m->map6.addr)) { + slog(LOG_CRIT, "Expected an IPv6 address but found \"%s\" on " + "line %d\n", args[1], ln); + exit(1); + } + if (validate_ip4_addr(&m->map4.addr) < 0) { + slog(LOG_CRIT, "Cannot use reserved address %s in map " + "directive, aborting...\n", args[0]); + exit(1); + } + if (validate_ip6_addr(&m->map6.addr) < 0) { + slog(LOG_CRIT, "Cannot use reserved address %s in map " + "directive, aborting...\n", args[1]); + exit(1); + } + if (m->map6.addr.s6_addr32[0] == WKPF) { + slog(LOG_CRIT, "Cannot create single-host maps inside " + "64:ff9b::/96, aborting...\n"); + exit(1); + } + if (insert_map4(&m->map4, &m4) < 0) + abort_on_conflict4("Error: IPv4 address in map directive", + ln, m4); + if (insert_map6(&m->map6, &m6) < 0) + abort_on_conflict6("Error: IPv6 address in map directive", + ln, m6); +} + +static void config_dynamic_pool(int ln, int arg_count, char **args) +{ + struct dynamic_pool *pool; + struct map4 *m4; + + if (gcfg->dynamic_pool) { + slog(LOG_CRIT, "Error: duplicate dynamic-pool directive on " + "line %d\n", ln); + exit(1); + } + + pool = (struct dynamic_pool *)malloc(sizeof(struct dynamic_pool)); + if (!pool) { + slog(LOG_CRIT, "Unable to allocate config memory\n"); + exit(1); + } + memset(pool, 0, sizeof(struct dynamic_pool)); + INIT_LIST_HEAD(&pool->mapped_list); + INIT_LIST_HEAD(&pool->dormant_list); + INIT_LIST_HEAD(&pool->free_list); + + m4 = &pool->map4; + m4->type = MAP_TYPE_DYNAMIC_POOL; + INIT_LIST_HEAD(&m4->list); + + if (parse_prefix(AF_INET, args[0], &m4->addr, &m4->prefix_len) || + calc_ip4_mask(&m4->mask, &m4->addr, m4->prefix_len)) { + slog(LOG_CRIT, "Expected an IPv4 prefix but found \"%s\" on " + "line %d\n", args[0], ln); + exit(1); + } + if (validate_ip4_addr(&m4->addr) < 0) { + slog(LOG_CRIT, "Cannot use reserved address %s in dynamic-pool " + "directive, aborting...\n", args[0]); + exit(1); + } + if (m4->prefix_len > 31) { + slog(LOG_CRIT, "Cannot use a prefix longer than /31 in " + "dynamic-pool directive, aborting...\n"); + exit(1); + } + if (insert_map4(&pool->map4, &m4) < 0) + abort_on_conflict4("Error: IPv4 prefix in dynamic-pool " + "directive", ln, m4); + + pool->free_head.addr = ntohl(m4->addr.s_addr); + pool->free_head.count = (1 << (32 - m4->prefix_len)) - 1; + INIT_LIST_HEAD(&pool->free_head.list); + list_add(&pool->free_head.list, &pool->free_list); + + gcfg->dynamic_pool = pool; +} + +static void config_data_dir(int ln, int arg_count, char **args) +{ + if (gcfg->data_dir[0]) { + slog(LOG_CRIT, "Error: duplicate data-dir directive on line " + "%d\n", ln); + exit(1); + } + if (args[0][0] != '/') { + slog(LOG_CRIT, "Error: data-dir must be an absolute path\n"); + exit(1); + } + strcpy(gcfg->data_dir, args[0]); +} + +static void config_strict_fh(int ln, int arg_count, char **args) +{ + if (!strcasecmp(args[0], "true") || !strcasecmp(args[0], "on") || + !strcasecmp(args[0], "1")) { + gcfg->lazy_frag_hdr = 0; + } else if (!strcasecmp(args[0], "false") || + !strcasecmp(args[0], "off") || + !strcasecmp(args[0], "0")) { + gcfg->lazy_frag_hdr = 1; + } else { + slog(LOG_CRIT, "Error: invalid value for strict-frag-hdr\n"); + exit(1); + } +} + +struct { + char *name; + void (*config_func)(int ln, int arg_count, char **args); + int need_args; +} config_directives[] = { + { "ipv4-addr", config_ipv4_addr, 1 }, + { "ipv6-addr", config_ipv6_addr, 1 }, + { "prefix", config_prefix, 1 }, + { "tun-device", config_tun_device, 1 }, + { "map", config_map, 2 }, + { "dynamic-pool", config_dynamic_pool, 1 }, + { "data-dir", config_data_dir, 1 }, + { "strict-frag-hdr", config_strict_fh, 1 }, + { NULL, NULL, 0 } +}; + +void read_config(char *conffile) +{ + FILE *in; + int ln = 0; + char line[512]; + char addrbuf[128]; + char *c, *tokptr; +#define MAX_ARGS 10 + char *args[MAX_ARGS]; + int arg_count; + int i; + struct map_static *m; + struct map4 *m4; + struct map6 *m6; + + gcfg = (struct config *)malloc(sizeof(struct config)); + if (!gcfg) + goto malloc_fail; + memset(gcfg, 0, sizeof(struct config)); + gcfg->recv_buf_size = 65536 + sizeof(struct tun_pi); + INIT_LIST_HEAD(&gcfg->map4_list); + INIT_LIST_HEAD(&gcfg->map6_list); + gcfg->dyn_min_lease = 7200 + 4 * 60; /* just over two hours */ + gcfg->dyn_max_lease = 14 * 86400; + gcfg->max_commit_delay = gcfg->dyn_max_lease / 4; + gcfg->hash_bits = 7; + gcfg->cache_size = 8192; + gcfg->allow_ident_gen = 1; + gcfg->ipv6_offlink_mtu = 1280; + gcfg->lazy_frag_hdr = 1; + INIT_LIST_HEAD(&gcfg->cache_pool); + INIT_LIST_HEAD(&gcfg->cache_active); + + in = fopen(conffile, "r"); + if (!in) { + slog(LOG_CRIT, "unable to open %s, aborting: %s\n", conffile, + strerror(errno)); + exit(1); + } + while (fgets(line, sizeof(line), in)) { + ++ln; + if (strlen(line) + 1 == sizeof(line)) { + slog(LOG_CRIT, "Line %d of %s is too long, " + "aborting...\n", ln, conffile); + exit(1); + } + arg_count = 0; + for (;;) { + c = strtok_r(arg_count ? NULL : line, DELIM, &tokptr); + if (!c || *c == '#') + break; + if (arg_count == MAX_ARGS) { + slog(LOG_CRIT, "Line %d of %s is too long, " + "aborting...\n", ln, conffile); + exit(1); + } + args[arg_count++] = c; + } + if (arg_count == 0) + continue; + for (i = 0; config_directives[i].name; ++i) + if (!strcasecmp(args[0], config_directives[i].name)) + break; + if (!config_directives[i].name) { + slog(LOG_CRIT, "Unknown directive \"%s\" on line %d of " + "%s, aborting...\n", args[0], + ln, conffile); + exit(1); + } + --arg_count; + if (config_directives[i].need_args >= 0 && + arg_count != config_directives[i].need_args) { + slog(LOG_CRIT, "Incorrect number of arguments on " + "line %d\n", ln); + exit(1); + } + config_directives[i].config_func(ln, arg_count, &args[1]); + } + fclose(in); + + if (list_empty(&gcfg->map6_list)) { + slog(LOG_CRIT, "Error: no translation maps or NAT64 prefix " + "configured\n"); + exit(1); + } + + m4 = list_entry(gcfg->map4_list.next, struct map4, list); + m6 = list_entry(gcfg->map6_list.next, struct map6, list); + + if (m4->type == MAP_TYPE_RFC6052 && m6->type == MAP_TYPE_RFC6052 && + !gcfg->allow_ident_gen) + gcfg->cache_size = 0; + + if (!gcfg->local_addr4.s_addr) { + slog(LOG_CRIT, "Error: no ipv4-addr directive found\n"); + exit(1); + } + + m = alloc_map_static(0); + m->map4.addr = gcfg->local_addr4; + if (insert_map4(&m->map4, &m4) < 0) + abort_on_conflict4("Error: ipv4-addr", 0, m4); + + if (gcfg->local_addr6.s6_addr32[0]) { + m->map6.addr = gcfg->local_addr6; + if (insert_map6(&m->map6, &m6) < 0) { + if (m6->type == MAP_TYPE_RFC6052) { + inet_ntop(AF_INET6, &m6->addr, + addrbuf, sizeof(addrbuf)); + slog(LOG_CRIT, "Error: ipv6-addr cannot reside " + "within configured prefix " + "%s/%d\n", addrbuf, + m6->prefix_len); + exit(1); + } else { + abort_on_conflict6("Error: ipv6-addr", 0, m6); + } + } + } else { + m6 = list_entry(gcfg->map6_list.prev, struct map6, list); + if (m6->type != MAP_TYPE_RFC6052) { + slog(LOG_CRIT, "Error: ipv6-addr directive must be " + "specified if no NAT64 prefix is " + "configured\n"); + exit(1); + } + if (append_to_prefix(&gcfg->local_addr6, &gcfg->local_addr4, + &m6->addr, m6->prefix_len)) { + slog(LOG_CRIT, "Error: ipv6-addr directive must be " + "specified if prefix is 64:ff9b::/96 " + "and ipv4-addr is a non-global " + "(RFC 1918) address\n"); + exit(1); + } + m->map6.addr = gcfg->local_addr6; + } + return; + +malloc_fail: + slog(LOG_CRIT, "Unable to allocate config memory\n"); + exit(1); +} diff --git a/config.h.in b/config.h.in new file mode 100644 index 0000000..dd3b02c --- /dev/null +++ b/config.h.in @@ -0,0 +1,25 @@ +/* config.h.in. Generated from configure.ac by autoheader. */ + +/* Name of package */ +#undef PACKAGE + +/* Define to the address where bug reports for this package should be sent. */ +#undef PACKAGE_BUGREPORT + +/* Define to the full name of this package. */ +#undef PACKAGE_NAME + +/* Define to the full name and version of this package. */ +#undef PACKAGE_STRING + +/* Define to the one symbol short name of this package. */ +#undef PACKAGE_TARNAME + +/* Define to the home page for this package. */ +#undef PACKAGE_URL + +/* Define to the version of this package. */ +#undef PACKAGE_VERSION + +/* Version number of package */ +#undef VERSION diff --git a/configure b/configure new file mode 100755 index 0000000..0190ba4 --- /dev/null +++ b/configure @@ -0,0 +1,4670 @@ +#! /bin/sh +# Guess values for system-dependent variables and create Makefiles. +# Generated by GNU Autoconf 2.65 for tayga 0.9.2. +# +# +# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, +# 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, +# Inc. +# +# +# This configure script is free software; the Free Software Foundation +# gives unlimited permission to copy, distribute and modify it. +## -------------------- ## +## M4sh Initialization. ## +## -------------------- ## + +# Be more Bourne compatible +DUALCASE=1; export DUALCASE # for MKS sh +if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then : + emulate sh + NULLCMD=: + # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which + # is contrary to our usage. Disable this feature. + alias -g '${1+"$@"}'='"$@"' + setopt NO_GLOB_SUBST +else + case `(set -o) 2>/dev/null` in #( + *posix*) : + set -o posix ;; #( + *) : + ;; +esac +fi + + +as_nl=' +' +export as_nl +# Printing a long string crashes Solaris 7 /usr/bin/printf. +as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' +as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo +as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo +# Prefer a ksh shell builtin over an external printf program on Solaris, +# but without wasting forks for bash or zsh. +if test -z "$BASH_VERSION$ZSH_VERSION" \ + && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then + as_echo='print -r --' + as_echo_n='print -rn --' +elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then + as_echo='printf %s\n' + as_echo_n='printf %s' +else + if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then + as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"' + as_echo_n='/usr/ucb/echo -n' + else + as_echo_body='eval expr "X$1" : "X\\(.*\\)"' + as_echo_n_body='eval + arg=$1; + case $arg in #( + *"$as_nl"*) + expr "X$arg" : "X\\(.*\\)$as_nl"; + arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;; + esac; + expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl" + ' + export as_echo_n_body + as_echo_n='sh -c $as_echo_n_body as_echo' + fi + export as_echo_body + as_echo='sh -c $as_echo_body as_echo' +fi + +# The user is always right. +if test "${PATH_SEPARATOR+set}" != set; then + PATH_SEPARATOR=: + (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && { + (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 || + PATH_SEPARATOR=';' + } +fi + + +# IFS +# We need space, tab and new line, in precisely that order. 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See below for descriptions of some of the useful variables. + +Defaults for the options are specified in brackets. + +Configuration: + -h, --help display this help and exit + --help=short display options specific to this package + --help=recursive display the short help of all the included packages + -V, --version display version information and exit + -q, --quiet, --silent do not print \`checking...' messages + --cache-file=FILE cache test results in FILE [disabled] + -C, --config-cache alias for \`--cache-file=config.cache' + -n, --no-create do not create output files + --srcdir=DIR find the sources in DIR [configure dir or \`..'] + +Installation directories: + --prefix=PREFIX install architecture-independent files in PREFIX + [$ac_default_prefix] + --exec-prefix=EPREFIX install architecture-dependent files in EPREFIX + [PREFIX] + +By default, \`make install' will install all the files in +\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc. You can specify +an installation prefix other than \`$ac_default_prefix' using \`--prefix', +for instance \`--prefix=\$HOME'. + +For better control, use the options below. + +Fine tuning of the installation directories: + --bindir=DIR user executables [EPREFIX/bin] + --sbindir=DIR system admin executables [EPREFIX/sbin] + --libexecdir=DIR program executables [EPREFIX/libexec] + --sysconfdir=DIR read-only single-machine data [PREFIX/etc] + --sharedstatedir=DIR modifiable architecture-independent data [PREFIX/com] + --localstatedir=DIR modifiable single-machine data [PREFIX/var] + --libdir=DIR object code libraries [EPREFIX/lib] + --includedir=DIR C header files [PREFIX/include] + --oldincludedir=DIR C header files for non-gcc [/usr/include] + --datarootdir=DIR read-only arch.-independent data root [PREFIX/share] + --datadir=DIR read-only architecture-independent data [DATAROOTDIR] + --infodir=DIR info documentation [DATAROOTDIR/info] + --localedir=DIR locale-dependent data [DATAROOTDIR/locale] + --mandir=DIR man documentation [DATAROOTDIR/man] + --docdir=DIR documentation root [DATAROOTDIR/doc/tayga] + --htmldir=DIR html documentation [DOCDIR] + --dvidir=DIR dvi documentation [DOCDIR] + --pdfdir=DIR pdf documentation [DOCDIR] + --psdir=DIR ps documentation [DOCDIR] +_ACEOF + + cat <<\_ACEOF + +Program names: + --program-prefix=PREFIX prepend PREFIX to installed program names + --program-suffix=SUFFIX append SUFFIX to installed program names + --program-transform-name=PROGRAM run sed PROGRAM on installed program names +_ACEOF +fi + +if test -n "$ac_init_help"; then + case $ac_init_help in + short | recursive ) echo "Configuration of tayga 0.9.2:";; + esac + cat <<\_ACEOF + +Optional Features: + --disable-option-checking ignore unrecognized --enable/--with options + --disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no) + --enable-FEATURE[=ARG] include FEATURE [ARG=yes] + --disable-dependency-tracking speeds up one-time build + --enable-dependency-tracking do not reject slow dependency extractors + +Some influential environment variables: + CC C compiler command + CFLAGS C compiler flags + LDFLAGS linker flags, e.g. -L if you have libraries in a + nonstandard directory + LIBS libraries to pass to the linker, e.g. -l + CPPFLAGS (Objective) C/C++ preprocessor flags, e.g. -I if + you have headers in a nonstandard directory + +Use these variables to override the choices made by `configure' or to help +it to find libraries and programs with nonstandard names/locations. + +Report bugs to the package provider. +_ACEOF +ac_status=$? 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Accept space and tab only in the latter. +am_lf=' +' +case `pwd` in + *[\\\"\#\$\&\'\`$am_lf]*) + as_fn_error "unsafe absolute working directory name" "$LINENO" 5;; +esac +case $srcdir in + *[\\\"\#\$\&\'\`$am_lf\ \ ]*) + as_fn_error "unsafe srcdir value: \`$srcdir'" "$LINENO" 5;; +esac + +# Do `set' in a subshell so we don't clobber the current shell's +# arguments. Must try -L first in case configure is actually a +# symlink; some systems play weird games with the mod time of symlinks +# (eg FreeBSD returns the mod time of the symlink's containing +# directory). +if ( + set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null` + if test "$*" = "X"; then + # -L didn't work. + set X `ls -t "$srcdir/configure" conftest.file` + fi + rm -f conftest.file + if test "$*" != "X $srcdir/configure conftest.file" \ + && test "$*" != "X conftest.file $srcdir/configure"; then + + # If neither matched, then we have a broken ls. This can happen + # if, for instance, CONFIG_SHELL is bash and it inherits a + # broken ls alias from the environment. This has actually + # happened. Such a system could not be considered "sane". + as_fn_error "ls -t appears to fail. Make sure there is not a broken +alias in your environment" "$LINENO" 5 + fi + + test "$2" = conftest.file + ) +then + # Ok. + : +else + as_fn_error "newly created file is older than distributed files! +Check your system clock" "$LINENO" 5 +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +test "$program_prefix" != NONE && + program_transform_name="s&^&$program_prefix&;$program_transform_name" +# Use a double $ so make ignores it. +test "$program_suffix" != NONE && + program_transform_name="s&\$&$program_suffix&;$program_transform_name" +# Double any \ or $. +# By default was `s,x,x', remove it if useless. +ac_script='s/[\\$]/&&/g;s/;s,x,x,$//' +program_transform_name=`$as_echo "$program_transform_name" | sed "$ac_script"` + +# expand $ac_aux_dir to an absolute path +am_aux_dir=`cd $ac_aux_dir && pwd` + +if test x"${MISSING+set}" != xset; then + case $am_aux_dir in + *\ * | *\ *) + MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;; + *) + MISSING="\${SHELL} $am_aux_dir/missing" ;; + esac +fi +# Use eval to expand $SHELL +if eval "$MISSING --run true"; then + am_missing_run="$MISSING --run " +else + am_missing_run= + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: \`missing' script is too old or missing" >&5 +$as_echo "$as_me: WARNING: \`missing' script is too old or missing" >&2;} +fi + +if test x"${install_sh}" != xset; then + case $am_aux_dir in + *\ * | *\ *) + install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;; + *) + install_sh="\${SHELL} $am_aux_dir/install-sh" + esac +fi + +# Installed binaries are usually stripped using `strip' when the user +# run `make install-strip'. However `strip' might not be the right +# tool to use in cross-compilation environments, therefore Automake +# will honor the `STRIP' environment variable to overrule this program. +if test "$cross_compiling" != no; then + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args. +set dummy ${ac_tool_prefix}strip; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_STRIP+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$STRIP"; then + ac_cv_prog_STRIP="$STRIP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_STRIP="${ac_tool_prefix}strip" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +STRIP=$ac_cv_prog_STRIP +if test -n "$STRIP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5 +$as_echo "$STRIP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_STRIP"; then + ac_ct_STRIP=$STRIP + # Extract the first word of "strip", so it can be a program name with args. +set dummy strip; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_ac_ct_STRIP+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_STRIP"; then + ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_ac_ct_STRIP="strip" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP +if test -n "$ac_ct_STRIP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5 +$as_echo "$ac_ct_STRIP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_STRIP" = x; then + STRIP=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + STRIP=$ac_ct_STRIP + fi +else + STRIP="$ac_cv_prog_STRIP" +fi + +fi +INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s" + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a thread-safe mkdir -p" >&5 +$as_echo_n "checking for a thread-safe mkdir -p... " >&6; } +if test -z "$MKDIR_P"; then + if test "${ac_cv_path_mkdir+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH$PATH_SEPARATOR/opt/sfw/bin +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_prog in mkdir gmkdir; do + for ac_exec_ext in '' $ac_executable_extensions; do + { test -f "$as_dir/$ac_prog$ac_exec_ext" && $as_test_x "$as_dir/$ac_prog$ac_exec_ext"; } || continue + case `"$as_dir/$ac_prog$ac_exec_ext" --version 2>&1` in #( + 'mkdir (GNU coreutils) '* | \ + 'mkdir (coreutils) '* | \ + 'mkdir (fileutils) '4.1*) + ac_cv_path_mkdir=$as_dir/$ac_prog$ac_exec_ext + break 3;; + esac + done + done + done +IFS=$as_save_IFS + +fi + + test -d ./--version && rmdir ./--version + if test "${ac_cv_path_mkdir+set}" = set; then + MKDIR_P="$ac_cv_path_mkdir -p" + else + # As a last resort, use the slow shell script. Don't cache a + # value for MKDIR_P within a source directory, because that will + # break other packages using the cache if that directory is + # removed, or if the value is a relative name. + MKDIR_P="$ac_install_sh -d" + fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5 +$as_echo "$MKDIR_P" >&6; } + +mkdir_p="$MKDIR_P" +case $mkdir_p in + [\\/$]* | ?:[\\/]*) ;; + */*) mkdir_p="\$(top_builddir)/$mkdir_p" ;; +esac + +for ac_prog in gawk mawk nawk awk +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_AWK+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$AWK"; then + ac_cv_prog_AWK="$AWK" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_AWK="$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +AWK=$ac_cv_prog_AWK +if test -n "$AWK"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5 +$as_echo "$AWK" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$AWK" && break +done + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5 +$as_echo_n "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; } +set x ${MAKE-make} +ac_make=`$as_echo "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'` +if { as_var=ac_cv_prog_make_${ac_make}_set; eval "test \"\${$as_var+set}\" = set"; }; then : + $as_echo_n "(cached) " >&6 +else + cat >conftest.make <<\_ACEOF +SHELL = /bin/sh +all: + @echo '@@@%%%=$(MAKE)=@@@%%%' +_ACEOF +# GNU make sometimes prints "make[1]: Entering...", which would confuse us. +case `${MAKE-make} -f conftest.make 2>/dev/null` in + *@@@%%%=?*=@@@%%%*) + eval ac_cv_prog_make_${ac_make}_set=yes;; + *) + eval ac_cv_prog_make_${ac_make}_set=no;; +esac +rm -f conftest.make +fi +if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } + SET_MAKE= +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } + SET_MAKE="MAKE=${MAKE-make}" +fi + +rm -rf .tst 2>/dev/null +mkdir .tst 2>/dev/null +if test -d .tst; then + am__leading_dot=. +else + am__leading_dot=_ +fi +rmdir .tst 2>/dev/null + +if test "`cd $srcdir && pwd`" != "`pwd`"; then + # Use -I$(srcdir) only when $(srcdir) != ., so that make's output + # is not polluted with repeated "-I." + am__isrc=' -I$(srcdir)' + # test to see if srcdir already configured + if test -f $srcdir/config.status; then + as_fn_error "source directory already configured; run \"make distclean\" there first" "$LINENO" 5 + fi +fi + +# test whether we have cygpath +if test -z "$CYGPATH_W"; then + if (cygpath --version) >/dev/null 2>/dev/null; then + CYGPATH_W='cygpath -w' + else + CYGPATH_W=echo + fi +fi + + +# Define the identity of the package. + PACKAGE='tayga' + VERSION='0.9.2' + + +cat >>confdefs.h <<_ACEOF +#define PACKAGE "$PACKAGE" +_ACEOF + + +cat >>confdefs.h <<_ACEOF +#define VERSION "$VERSION" +_ACEOF + +# Some tools Automake needs. + +ACLOCAL=${ACLOCAL-"${am_missing_run}aclocal-${am__api_version}"} + + +AUTOCONF=${AUTOCONF-"${am_missing_run}autoconf"} + + +AUTOMAKE=${AUTOMAKE-"${am_missing_run}automake-${am__api_version}"} + + +AUTOHEADER=${AUTOHEADER-"${am_missing_run}autoheader"} + + +MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"} + +# We need awk for the "check" target. The system "awk" is bad on +# some platforms. +# Always define AMTAR for backward compatibility. + +AMTAR=${AMTAR-"${am_missing_run}tar"} + +am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -' + + + + + +ac_config_headers="$ac_config_headers config.h" + + +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args. +set dummy ${ac_tool_prefix}gcc; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_CC+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_CC="${ac_tool_prefix}gcc" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5 +$as_echo "$CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_CC"; then + ac_ct_CC=$CC + # Extract the first word of "gcc", so it can be a program name with args. +set dummy gcc; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_ac_ct_CC+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_CC"; then + ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_ac_ct_CC="gcc" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_CC=$ac_cv_prog_ac_ct_CC +if test -n "$ac_ct_CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5 +$as_echo "$ac_ct_CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_CC" = x; then + CC="" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + CC=$ac_ct_CC + fi +else + CC="$ac_cv_prog_CC" +fi + +if test -z "$CC"; then + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args. +set dummy ${ac_tool_prefix}cc; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_CC+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_CC="${ac_tool_prefix}cc" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5 +$as_echo "$CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + fi +fi +if test -z "$CC"; then + # Extract the first word of "cc", so it can be a program name with args. +set dummy cc; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_CC+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else + ac_prog_rejected=no +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then + ac_prog_rejected=yes + continue + fi + ac_cv_prog_CC="cc" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +if test $ac_prog_rejected = yes; then + # We found a bogon in the path, so make sure we never use it. + set dummy $ac_cv_prog_CC + shift + if test $# != 0; then + # We chose a different compiler from the bogus one. + # However, it has the same basename, so the bogon will be chosen + # first if we set CC to just the basename; use the full file name. + shift + ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@" + fi +fi +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5 +$as_echo "$CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$CC"; then + if test -n "$ac_tool_prefix"; then + for ac_prog in cl.exe + do + # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. +set dummy $ac_tool_prefix$ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_CC+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_CC="$ac_tool_prefix$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5 +$as_echo "$CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$CC" && break + done +fi +if test -z "$CC"; then + ac_ct_CC=$CC + for ac_prog in cl.exe +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_ac_ct_CC+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_CC"; then + ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_ac_ct_CC="$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_CC=$ac_cv_prog_ac_ct_CC +if test -n "$ac_ct_CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5 +$as_echo "$ac_ct_CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$ac_ct_CC" && break +done + + if test "x$ac_ct_CC" = x; then + CC="" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + CC=$ac_ct_CC + fi +fi + +fi + + +test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error "no acceptable C compiler found in \$PATH +See \`config.log' for more details." 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We should not override ac_cv_exeext if it was cached, +# so that the user can short-circuit this test for compilers unknown to +# Autoconf. +for ac_file in $ac_files '' +do + test -f "$ac_file" || continue + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) + ;; + [ab].out ) + # We found the default executable, but exeext='' is most + # certainly right. + break;; + *.* ) + if test "${ac_cv_exeext+set}" = set && test "$ac_cv_exeext" != no; + then :; else + ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'` + fi + # We set ac_cv_exeext here because the later test for it is not + # safe: cross compilers may not add the suffix if given an `-o' + # argument, so we may need to know it at that point already. + # Even if this section looks crufty: it has the advantage of + # actually working. + break;; + * ) + break;; + esac +done +test "$ac_cv_exeext" = no && ac_cv_exeext= + +else + ac_file='' +fi +if test -z "$ac_file"; then : + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +$as_echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +{ as_fn_set_status 77 +as_fn_error "C compiler cannot create executables +See \`config.log' for more details." "$LINENO" 5; }; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5 +$as_echo_n "checking for C compiler default output file name... " >&6; } +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5 +$as_echo "$ac_file" >&6; } +ac_exeext=$ac_cv_exeext + +rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out +ac_clean_files=$ac_clean_files_save +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5 +$as_echo_n "checking for suffix of executables... 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For instance with Cygwin, `ls conftest' will +# work properly (i.e., refer to `conftest.exe'), while it won't with +# `rm'. +for ac_file in conftest.exe conftest conftest.*; do + test -f "$ac_file" || continue + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;; + *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'` + break;; + * ) break;; + esac +done +else + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error "cannot compute suffix of executables: cannot compile and link +See \`config.log' for more details." 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"$LINENO" 5; } + fi + fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5 +$as_echo "$cross_compiling" >&6; } + +rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out +ac_clean_files=$ac_clean_files_save +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5 +$as_echo_n "checking for suffix of object files... " >&6; } +if test "${ac_cv_objext+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +rm -f conftest.o conftest.obj +if { { ac_try="$ac_compile" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\"" +$as_echo "$ac_try_echo"; } >&5 + (eval "$ac_compile") 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then : + for ac_file in conftest.o conftest.obj conftest.*; do + test -f "$ac_file" || continue; + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM ) ;; + *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'` + break;; + esac +done +else + $as_echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error "cannot compute suffix of object files: cannot compile +See \`config.log' for more details." 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" >&6; } +if test "${ac_cv_prog_cc_c89+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + ac_cv_prog_cc_c89=no +ac_save_CC=$CC +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +#include +#include +#include +/* Most of the following tests are stolen from RCS 5.7's src/conf.sh. */ +struct buf { int x; }; +FILE * (*rcsopen) (struct buf *, struct stat *, int); +static char *e (p, i) + char **p; + int i; +{ + return p[i]; +} +static char *f (char * (*g) (char **, int), char **p, ...) +{ + char *s; + va_list v; + va_start (v,p); + s = g (p, va_arg (v,int)); + va_end (v); + return s; +} + +/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default. It has + function prototypes and stuff, but not '\xHH' hex character constants. + These don't provoke an error unfortunately, instead are silently treated + as 'x'. The following induces an error, until -std is added to get + proper ANSI mode. Curiously '\x00'!='x' always comes out true, for an + array size at least. It's necessary to write '\x00'==0 to get something + that's true only with -std. */ +int osf4_cc_array ['\x00' == 0 ? 1 : -1]; + +/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters + inside strings and character constants. */ +#define FOO(x) 'x' +int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1]; + +int test (int i, double x); +struct s1 {int (*f) (int a);}; +struct s2 {int (*f) (double a);}; +int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int); +int argc; +char **argv; +int +main () +{ +return f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]; + ; + return 0; +} +_ACEOF +for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \ + -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__" +do + CC="$ac_save_CC $ac_arg" + if ac_fn_c_try_compile "$LINENO"; then : + ac_cv_prog_cc_c89=$ac_arg +fi +rm -f core conftest.err conftest.$ac_objext + test "x$ac_cv_prog_cc_c89" != "xno" && break +done +rm -f conftest.$ac_ext +CC=$ac_save_CC + +fi +# AC_CACHE_VAL +case "x$ac_cv_prog_cc_c89" in + x) + { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5 +$as_echo "none needed" >&6; } ;; + xno) + { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5 +$as_echo "unsupported" >&6; } ;; + *) + CC="$CC $ac_cv_prog_cc_c89" + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5 +$as_echo "$ac_cv_prog_cc_c89" >&6; } ;; +esac +if test "x$ac_cv_prog_cc_c89" != xno; then : + +fi + +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu +DEPDIR="${am__leading_dot}deps" + +ac_config_commands="$ac_config_commands depfiles" + + +am_make=${MAKE-make} +cat > confinc << 'END' +am__doit: + @echo this is the am__doit target +.PHONY: am__doit +END +# If we don't find an include directive, just comment out the code. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for style of include used by $am_make" >&5 +$as_echo_n "checking for style of include used by $am_make... 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The arguments +# must be portable across $(()) and expr. +if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then : + eval 'as_fn_arith () + { + as_val=$(( $* )) + }' +else + as_fn_arith () + { + as_val=`expr "$@" || test $? -eq 1` + } +fi # as_fn_arith + + +if expr a : '\(a\)' >/dev/null 2>&1 && + test "X`expr 00001 : '.*\(...\)'`" = X001; then + as_expr=expr +else + as_expr=false +fi + +if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then + as_basename=basename +else + as_basename=false +fi + +if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then + as_dirname=dirname +else + as_dirname=false +fi + +as_me=`$as_basename -- "$0" || +$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \ + X"$0" : 'X\(//\)$' \| \ + X"$0" : 'X\(/\)' \| . 2>/dev/null || +$as_echo X/"$0" | + sed '/^.*\/\([^/][^/]*\)\/*$/{ + s//\1/ + q + } + /^X\/\(\/\/\)$/{ + s//\1/ + q + } + /^X\/\(\/\).*/{ + s//\1/ + q + } + s/.*/./; q'` + +# Avoid depending upon Character Ranges. +as_cr_letters='abcdefghijklmnopqrstuvwxyz' +as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ' +as_cr_Letters=$as_cr_letters$as_cr_LETTERS +as_cr_digits='0123456789' +as_cr_alnum=$as_cr_Letters$as_cr_digits + +ECHO_C= ECHO_N= ECHO_T= +case `echo -n x` in #((((( +-n*) + case `echo 'xy\c'` in + *c*) ECHO_T=' ';; # ECHO_T is single tab character. + xy) ECHO_C='\c';; + *) echo `echo ksh88 bug on AIX 6.1` > /dev/null + ECHO_T=' ';; + esac;; +*) + ECHO_N='-n';; +esac + +rm -f conf$$ conf$$.exe conf$$.file +if test -d conf$$.dir; then + rm -f conf$$.dir/conf$$.file +else + rm -f conf$$.dir + mkdir conf$$.dir 2>/dev/null +fi +if (echo >conf$$.file) 2>/dev/null; then + if ln -s conf$$.file conf$$ 2>/dev/null; then + as_ln_s='ln -s' + # ... but there are two gotchas: + # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail. + # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable. + # In both cases, we have to default to `cp -p'. + ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe || + as_ln_s='cp -p' + elif ln conf$$.file conf$$ 2>/dev/null; then + as_ln_s=ln + else + as_ln_s='cp -p' + fi +else + as_ln_s='cp -p' +fi +rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file +rmdir conf$$.dir 2>/dev/null + + +# as_fn_mkdir_p +# ------------- +# Create "$as_dir" as a directory, including parents if necessary. +as_fn_mkdir_p () +{ + + case $as_dir in #( + -*) as_dir=./$as_dir;; + esac + test -d "$as_dir" || eval $as_mkdir_p || { + as_dirs= + while :; do + case $as_dir in #( + *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'( + *) as_qdir=$as_dir;; + esac + as_dirs="'$as_qdir' $as_dirs" + as_dir=`$as_dirname -- "$as_dir" || +$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \ + X"$as_dir" : 'X\(//\)[^/]' \| \ + X"$as_dir" : 'X\(//\)$' \| \ + X"$as_dir" : 'X\(/\)' \| . 2>/dev/null || +$as_echo X"$as_dir" | + sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ + s//\1/ + q + } + /^X\(\/\/\)[^/].*/{ + s//\1/ + q + } + /^X\(\/\/\)$/{ + s//\1/ + q + } + /^X\(\/\).*/{ + s//\1/ + q + } + s/.*/./; q'` + test -d "$as_dir" && break + done + test -z "$as_dirs" || eval "mkdir $as_dirs" + } || test -d "$as_dir" || as_fn_error "cannot create directory $as_dir" + + +} # as_fn_mkdir_p +if mkdir -p . 2>/dev/null; then + as_mkdir_p='mkdir -p "$as_dir"' +else + test -d ./-p && rmdir ./-p + as_mkdir_p=false +fi + +if test -x / >/dev/null 2>&1; then + as_test_x='test -x' +else + if ls -dL / >/dev/null 2>&1; then + as_ls_L_option=L + else + as_ls_L_option= + fi + as_test_x=' + eval sh -c '\'' + if test -d "$1"; then + test -d "$1/."; + else + case $1 in #( + -*)set "./$1";; + esac; + case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in #(( + ???[sx]*):;;*)false;;esac;fi + '\'' sh + ' +fi +as_executable_p=$as_test_x + +# Sed expression to map a string onto a valid CPP name. +as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'" + +# Sed expression to map a string onto a valid variable name. +as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'" + + +exec 6>&1 +## ----------------------------------- ## +## Main body of $CONFIG_STATUS script. ## +## ----------------------------------- ## +_ASEOF +test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1 + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +# Save the log message, to keep $0 and so on meaningful, and to +# report actual input values of CONFIG_FILES etc. instead of their +# values after options handling. +ac_log=" +This file was extended by tayga $as_me 0.9.2, which was +generated by GNU Autoconf 2.65. Invocation command line was + + CONFIG_FILES = $CONFIG_FILES + CONFIG_HEADERS = $CONFIG_HEADERS + CONFIG_LINKS = $CONFIG_LINKS + CONFIG_COMMANDS = $CONFIG_COMMANDS + $ $0 $@ + +on `(hostname || uname -n) 2>/dev/null | sed 1q` +" + +_ACEOF + +case $ac_config_files in *" +"*) set x $ac_config_files; shift; ac_config_files=$*;; +esac + +case $ac_config_headers in *" +"*) set x $ac_config_headers; shift; ac_config_headers=$*;; +esac + + +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +# Files that config.status was made for. +config_files="$ac_config_files" +config_headers="$ac_config_headers" +config_commands="$ac_config_commands" + +_ACEOF + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +ac_cs_usage="\ +\`$as_me' instantiates files and other configuration actions +from templates according to the current configuration. Unless the files +and actions are specified as TAGs, all are instantiated by default. + +Usage: $0 [OPTION]... [TAG]... + + -h, --help print this help, then exit + -V, --version print version number and configuration settings, then exit + --config print configuration, then exit + -q, --quiet, --silent + do not print progress messages + -d, --debug don't remove temporary files + --recheck update $as_me by reconfiguring in the same conditions + --file=FILE[:TEMPLATE] + instantiate the configuration file FILE + --header=FILE[:TEMPLATE] + instantiate the configuration header FILE + +Configuration files: +$config_files + +Configuration headers: +$config_headers + +Configuration commands: +$config_commands + +Report bugs to the package provider." + +_ACEOF +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`" +ac_cs_version="\\ +tayga config.status 0.9.2 +configured by $0, generated by GNU Autoconf 2.65, + with options \\"\$ac_cs_config\\" + +Copyright (C) 2009 Free Software Foundation, Inc. +This config.status script is free software; the Free Software Foundation +gives unlimited permission to copy, distribute and modify it." + +ac_pwd='$ac_pwd' +srcdir='$srcdir' +INSTALL='$INSTALL' +MKDIR_P='$MKDIR_P' +AWK='$AWK' +test -n "\$AWK" || AWK=awk +_ACEOF + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +# The default lists apply if the user does not specify any file. +ac_need_defaults=: +while test $# != 0 +do + case $1 in + --*=*) + ac_option=`expr "X$1" : 'X\([^=]*\)='` + ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'` + ac_shift=: + ;; + *) + ac_option=$1 + ac_optarg=$2 + ac_shift=shift + ;; + esac + + case $ac_option in + # Handling of the options. + -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r) + ac_cs_recheck=: ;; + --version | --versio | --versi | --vers | --ver | --ve | --v | -V ) + $as_echo "$ac_cs_version"; exit ;; + --config | --confi | --conf | --con | --co | --c ) + $as_echo "$ac_cs_config"; exit ;; + --debug | --debu | --deb | --de | --d | -d ) + debug=: ;; + --file | --fil | --fi | --f ) + $ac_shift + case $ac_optarg in + *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;; + esac + as_fn_append CONFIG_FILES " '$ac_optarg'" + ac_need_defaults=false;; + --header | --heade | --head | --hea ) + $ac_shift + case $ac_optarg in + *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;; + esac + as_fn_append CONFIG_HEADERS " '$ac_optarg'" + ac_need_defaults=false;; + --he | --h) + # Conflict between --help and --header + as_fn_error "ambiguous option: \`$1' +Try \`$0 --help' for more information.";; + --help | --hel | -h ) + $as_echo "$ac_cs_usage"; exit ;; + -q | -quiet | --quiet | --quie | --qui | --qu | --q \ + | -silent | --silent | --silen | --sile | --sil | --si | --s) + ac_cs_silent=: ;; + + # This is an error. + -*) as_fn_error "unrecognized option: \`$1' +Try \`$0 --help' for more information." ;; + + *) as_fn_append ac_config_targets " $1" + ac_need_defaults=false ;; + + esac + shift +done + +ac_configure_extra_args= + +if $ac_cs_silent; then + exec 6>/dev/null + ac_configure_extra_args="$ac_configure_extra_args --silent" +fi + +_ACEOF +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +if \$ac_cs_recheck; then + set X '$SHELL' '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion + shift + \$as_echo "running CONFIG_SHELL=$SHELL \$*" >&6 + CONFIG_SHELL='$SHELL' + export CONFIG_SHELL + exec "\$@" +fi + +_ACEOF +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +exec 5>>config.log +{ + echo + sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX +## Running $as_me. ## +_ASBOX + $as_echo "$ac_log" +} >&5 + +_ACEOF +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +# +# INIT-COMMANDS +# +AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir" + +_ACEOF + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 + +# Handling of arguments. +for ac_config_target in $ac_config_targets +do + case $ac_config_target in + "config.h") CONFIG_HEADERS="$CONFIG_HEADERS config.h" ;; + "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;; + "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;; + + *) as_fn_error "invalid argument: \`$ac_config_target'" "$LINENO" 5;; + esac +done + + +# If the user did not use the arguments to specify the items to instantiate, +# then the envvar interface is used. Set only those that are not. +# We use the long form for the default assignment because of an extremely +# bizarre bug on SunOS 4.1.3. +if $ac_need_defaults; then + test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files + test "${CONFIG_HEADERS+set}" = set || CONFIG_HEADERS=$config_headers + test "${CONFIG_COMMANDS+set}" = set || CONFIG_COMMANDS=$config_commands +fi + +# Have a temporary directory for convenience. Make it in the build tree +# simply because there is no reason against having it here, and in addition, +# creating and moving files from /tmp can sometimes cause problems. +# Hook for its removal unless debugging. +# Note that there is a small window in which the directory will not be cleaned: +# after its creation but before its name has been assigned to `$tmp'. +$debug || +{ + tmp= + trap 'exit_status=$? + { test -z "$tmp" || test ! -d "$tmp" || rm -fr "$tmp"; } && exit $exit_status +' 0 + trap 'as_fn_exit 1' 1 2 13 15 +} +# Create a (secure) tmp directory for tmp files. + +{ + tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` && + test -n "$tmp" && test -d "$tmp" +} || +{ + tmp=./conf$$-$RANDOM + (umask 077 && mkdir "$tmp") +} || as_fn_error "cannot create a temporary directory in ." "$LINENO" 5 + +# Set up the scripts for CONFIG_FILES section. +# No need to generate them if there are no CONFIG_FILES. +# This happens for instance with `./config.status config.h'. +if test -n "$CONFIG_FILES"; then + + +ac_cr=`echo X | tr X '\015'` +# On cygwin, bash can eat \r inside `` if the user requested igncr. +# But we know of no other shell where ac_cr would be empty at this +# point, so we can use a bashism as a fallback. +if test "x$ac_cr" = x; then + eval ac_cr=\$\'\\r\' +fi +ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' /dev/null` +if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then + ac_cs_awk_cr='\r' +else + ac_cs_awk_cr=$ac_cr +fi + +echo 'BEGIN {' >"$tmp/subs1.awk" && +_ACEOF + + +{ + echo "cat >conf$$subs.awk <<_ACEOF" && + echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' && + echo "_ACEOF" +} >conf$$subs.sh || + as_fn_error "could not make $CONFIG_STATUS" "$LINENO" 5 +ac_delim_num=`echo "$ac_subst_vars" | grep -c '$'` +ac_delim='%!_!# ' +for ac_last_try in false false false false false :; do + . ./conf$$subs.sh || + as_fn_error "could not make $CONFIG_STATUS" "$LINENO" 5 + + ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X` + if test $ac_delim_n = $ac_delim_num; then + break + elif $ac_last_try; then + as_fn_error "could not make $CONFIG_STATUS" "$LINENO" 5 + else + ac_delim="$ac_delim!$ac_delim _$ac_delim!! " + fi +done +rm -f conf$$subs.sh + +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +cat >>"\$tmp/subs1.awk" <<\\_ACAWK && +_ACEOF +sed -n ' +h +s/^/S["/; s/!.*/"]=/ +p +g +s/^[^!]*!// +:repl +t repl +s/'"$ac_delim"'$// +t delim +:nl +h +s/\(.\{148\}\)..*/\1/ +t more1 +s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/ +p +n +b repl +:more1 +s/["\\]/\\&/g; s/^/"/; s/$/"\\/ +p +g +s/.\{148\}// +t nl +:delim +h +s/\(.\{148\}\)..*/\1/ +t more2 +s/["\\]/\\&/g; s/^/"/; s/$/"/ +p +b +:more2 +s/["\\]/\\&/g; s/^/"/; s/$/"\\/ +p +g +s/.\{148\}// +t delim +' >$CONFIG_STATUS || ac_write_fail=1 +rm -f conf$$subs.awk +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +_ACAWK +cat >>"\$tmp/subs1.awk" <<_ACAWK && + for (key in S) S_is_set[key] = 1 + FS = "" + +} +{ + line = $ 0 + nfields = split(line, field, "@") + substed = 0 + len = length(field[1]) + for (i = 2; i < nfields; i++) { + key = field[i] + keylen = length(key) + if (S_is_set[key]) { + value = S[key] + line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3) + len += length(value) + length(field[++i]) + substed = 1 + } else + len += 1 + keylen + } + + print line +} + +_ACAWK +_ACEOF +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then + sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g" +else + cat +fi < "$tmp/subs1.awk" > "$tmp/subs.awk" \ + || as_fn_error "could not setup config files machinery" "$LINENO" 5 +_ACEOF + +# VPATH may cause trouble with some makes, so we remove $(srcdir), +# ${srcdir} and @srcdir@ from VPATH if srcdir is ".", strip leading and +# trailing colons and then remove the whole line if VPATH becomes empty +# (actually we leave an empty line to preserve line numbers). +if test "x$srcdir" = x.; then + ac_vpsub='/^[ ]*VPATH[ ]*=/{ +s/:*\$(srcdir):*/:/ +s/:*\${srcdir}:*/:/ +s/:*@srcdir@:*/:/ +s/^\([^=]*=[ ]*\):*/\1/ +s/:*$// +s/^[^=]*=[ ]*$// +}' +fi + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +fi # test -n "$CONFIG_FILES" + +# Set up the scripts for CONFIG_HEADERS section. +# No need to generate them if there are no CONFIG_HEADERS. +# This happens for instance with `./config.status Makefile'. +if test -n "$CONFIG_HEADERS"; then +cat >"$tmp/defines.awk" <<\_ACAWK || +BEGIN { +_ACEOF + +# Transform confdefs.h into an awk script `defines.awk', embedded as +# here-document in config.status, that substitutes the proper values into +# config.h.in to produce config.h. + +# Create a delimiter string that does not exist in confdefs.h, to ease +# handling of long lines. +ac_delim='%!_!# ' +for ac_last_try in false false :; do + ac_t=`sed -n "/$ac_delim/p" confdefs.h` + if test -z "$ac_t"; then + break + elif $ac_last_try; then + as_fn_error "could not make $CONFIG_HEADERS" "$LINENO" 5 + else + ac_delim="$ac_delim!$ac_delim _$ac_delim!! " + fi +done + +# For the awk script, D is an array of macro values keyed by name, +# likewise P contains macro parameters if any. Preserve backslash +# newline sequences. + +ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]* +sed -n ' +s/.\{148\}/&'"$ac_delim"'/g +t rset +:rset +s/^[ ]*#[ ]*define[ ][ ]*/ / +t def +d +:def +s/\\$// +t bsnl +s/["\\]/\\&/g +s/^ \('"$ac_word_re"'\)\(([^()]*)\)[ ]*\(.*\)/P["\1"]="\2"\ +D["\1"]=" \3"/p +s/^ \('"$ac_word_re"'\)[ ]*\(.*\)/D["\1"]=" \2"/p +d +:bsnl +s/["\\]/\\&/g +s/^ \('"$ac_word_re"'\)\(([^()]*)\)[ ]*\(.*\)/P["\1"]="\2"\ +D["\1"]=" \3\\\\\\n"\\/p +t cont +s/^ \('"$ac_word_re"'\)[ ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p +t cont +d +:cont +n +s/.\{148\}/&'"$ac_delim"'/g +t clear +:clear +s/\\$// +t bsnlc +s/["\\]/\\&/g; s/^/"/; s/$/"/p +d +:bsnlc +s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p +b cont +' >$CONFIG_STATUS || ac_write_fail=1 + +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 + for (key in D) D_is_set[key] = 1 + FS = "" +} +/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ { + line = \$ 0 + split(line, arg, " ") + if (arg[1] == "#") { + defundef = arg[2] + mac1 = arg[3] + } else { + defundef = substr(arg[1], 2) + mac1 = arg[2] + } + split(mac1, mac2, "(") #) + macro = mac2[1] + prefix = substr(line, 1, index(line, defundef) - 1) + if (D_is_set[macro]) { + # Preserve the white space surrounding the "#". + print prefix "define", macro P[macro] D[macro] + next + } else { + # Replace #undef with comments. This is necessary, for example, + # in the case of _POSIX_SOURCE, which is predefined and required + # on some systems where configure will not decide to define it. + if (defundef == "undef") { + print "/*", prefix defundef, macro, "*/" + next + } + } +} +{ print } +_ACAWK +_ACEOF +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 + as_fn_error "could not setup config headers machinery" "$LINENO" 5 +fi # test -n "$CONFIG_HEADERS" + + +eval set X " :F $CONFIG_FILES :H $CONFIG_HEADERS :C $CONFIG_COMMANDS" +shift +for ac_tag +do + case $ac_tag in + :[FHLC]) ac_mode=$ac_tag; continue;; + esac + case $ac_mode$ac_tag in + :[FHL]*:*);; + :L* | :C*:*) as_fn_error "invalid tag \`$ac_tag'" "$LINENO" 5;; + :[FH]-) ac_tag=-:-;; + :[FH]*) ac_tag=$ac_tag:$ac_tag.in;; + esac + ac_save_IFS=$IFS + IFS=: + set x $ac_tag + IFS=$ac_save_IFS + shift + ac_file=$1 + shift + + case $ac_mode in + :L) ac_source=$1;; + :[FH]) + ac_file_inputs= + for ac_f + do + case $ac_f in + -) ac_f="$tmp/stdin";; + *) # Look for the file first in the build tree, then in the source tree + # (if the path is not absolute). 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So we exec the FD to /dev/null, +# effectively closing config.log, so it can be properly (re)opened and +# appended to by config.status. When coming back to configure, we +# need to make the FD available again. +if test "$no_create" != yes; then + ac_cs_success=: + ac_config_status_args= + test "$silent" = yes && + ac_config_status_args="$ac_config_status_args --quiet" + exec 5>/dev/null + $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false + exec 5>>config.log + # Use ||, not &&, to avoid exiting from the if with $? = 1, which + # would make configure fail if this is the last instruction. + $ac_cs_success || as_fn_exit $? +fi +if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5 +$as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;} +fi + diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..3d2a6c9 --- /dev/null +++ b/configure.ac @@ -0,0 +1,14 @@ +AC_INIT(tayga, 0.9.2) +AC_CONFIG_SRCDIR(nat64.c) +AM_INIT_AUTOMAKE([foreign dist-bzip2]) +AC_CONFIG_HEADERS(config.h) + +AC_PROG_CC + +CFLAGS='-g -Wall' + +tayga_conf_path=${sysconfdir}/tayga.conf + +AC_SUBST(tayga_conf_path) + +AC_OUTPUT([Makefile]) diff --git a/depcomp b/depcomp new file mode 100755 index 0000000..df8eea7 --- /dev/null +++ b/depcomp @@ -0,0 +1,630 @@ +#! /bin/sh +# depcomp - compile a program generating dependencies as side-effects + +scriptversion=2009-04-28.21; # UTC + +# Copyright (C) 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2009 Free +# Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# As a special exception to the GNU General Public License, if you +# distribute this file as part of a program that contains a +# configuration script generated by Autoconf, you may include it under +# the same distribution terms that you use for the rest of that program. + +# Originally written by Alexandre Oliva . + +case $1 in + '') + echo "$0: No command. Try \`$0 --help' for more information." 1>&2 + exit 1; + ;; + -h | --h*) + cat <<\EOF +Usage: depcomp [--help] [--version] PROGRAM [ARGS] + +Run PROGRAMS ARGS to compile a file, generating dependencies +as side-effects. + +Environment variables: + depmode Dependency tracking mode. + source Source file read by `PROGRAMS ARGS'. + object Object file output by `PROGRAMS ARGS'. + DEPDIR directory where to store dependencies. + depfile Dependency file to output. + tmpdepfile Temporary file to use when outputing dependencies. + libtool Whether libtool is used (yes/no). + +Report bugs to . +EOF + exit $? + ;; + -v | --v*) + echo "depcomp $scriptversion" + exit $? + ;; +esac + +if test -z "$depmode" || test -z "$source" || test -z "$object"; then + echo "depcomp: Variables source, object and depmode must be set" 1>&2 + exit 1 +fi + +# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po. +depfile=${depfile-`echo "$object" | + sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`} +tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`} + +rm -f "$tmpdepfile" + +# Some modes work just like other modes, but use different flags. We +# parameterize here, but still list the modes in the big case below, +# to make depend.m4 easier to write. Note that we *cannot* use a case +# here, because this file can only contain one case statement. +if test "$depmode" = hp; then + # HP compiler uses -M and no extra arg. + gccflag=-M + depmode=gcc +fi + +if test "$depmode" = dashXmstdout; then + # This is just like dashmstdout with a different argument. + dashmflag=-xM + depmode=dashmstdout +fi + +cygpath_u="cygpath -u -f -" +if test "$depmode" = msvcmsys; then + # This is just like msvisualcpp but w/o cygpath translation. + # Just convert the backslash-escaped backslashes to single forward + # slashes to satisfy depend.m4 + cygpath_u="sed s,\\\\\\\\,/,g" + depmode=msvisualcpp +fi + +case "$depmode" in +gcc3) +## gcc 3 implements dependency tracking that does exactly what +## we want. Yay! Note: for some reason libtool 1.4 doesn't like +## it if -MD -MP comes after the -MF stuff. Hmm. +## Unfortunately, FreeBSD c89 acceptance of flags depends upon +## the command line argument order; so add the flags where they +## appear in depend2.am. Note that the slowdown incurred here +## affects only configure: in makefiles, %FASTDEP% shortcuts this. + for arg + do + case $arg in + -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;; + *) set fnord "$@" "$arg" ;; + esac + shift # fnord + shift # $arg + done + "$@" + stat=$? + if test $stat -eq 0; then : + else + rm -f "$tmpdepfile" + exit $stat + fi + mv "$tmpdepfile" "$depfile" + ;; + +gcc) +## There are various ways to get dependency output from gcc. Here's +## why we pick this rather obscure method: +## - Don't want to use -MD because we'd like the dependencies to end +## up in a subdir. Having to rename by hand is ugly. +## (We might end up doing this anyway to support other compilers.) +## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like +## -MM, not -M (despite what the docs say). +## - Using -M directly means running the compiler twice (even worse +## than renaming). + if test -z "$gccflag"; then + gccflag=-MD, + fi + "$@" -Wp,"$gccflag$tmpdepfile" + stat=$? + if test $stat -eq 0; then : + else + rm -f "$tmpdepfile" + exit $stat + fi + rm -f "$depfile" + echo "$object : \\" > "$depfile" + alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz +## The second -e expression handles DOS-style file names with drive letters. + sed -e 's/^[^:]*: / /' \ + -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile" +## This next piece of magic avoids the `deleted header file' problem. +## The problem is that when a header file which appears in a .P file +## is deleted, the dependency causes make to die (because there is +## typically no way to rebuild the header). We avoid this by adding +## dummy dependencies for each header file. Too bad gcc doesn't do +## this for us directly. + tr ' ' ' +' < "$tmpdepfile" | +## Some versions of gcc put a space before the `:'. On the theory +## that the space means something, we add a space to the output as +## well. +## Some versions of the HPUX 10.20 sed can't process this invocation +## correctly. Breaking it into two sed invocations is a workaround. + sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" + rm -f "$tmpdepfile" + ;; + +hp) + # This case exists only to let depend.m4 do its work. It works by + # looking at the text of this script. This case will never be run, + # since it is checked for above. + exit 1 + ;; + +sgi) + if test "$libtool" = yes; then + "$@" "-Wp,-MDupdate,$tmpdepfile" + else + "$@" -MDupdate "$tmpdepfile" + fi + stat=$? + if test $stat -eq 0; then : + else + rm -f "$tmpdepfile" + exit $stat + fi + rm -f "$depfile" + + if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files + echo "$object : \\" > "$depfile" + + # Clip off the initial element (the dependent). Don't try to be + # clever and replace this with sed code, as IRIX sed won't handle + # lines with more than a fixed number of characters (4096 in + # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines; + # the IRIX cc adds comments like `#:fec' to the end of the + # dependency line. + tr ' ' ' +' < "$tmpdepfile" \ + | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \ + tr ' +' ' ' >> "$depfile" + echo >> "$depfile" + + # The second pass generates a dummy entry for each header file. + tr ' ' ' +' < "$tmpdepfile" \ + | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ + >> "$depfile" + else + # The sourcefile does not contain any dependencies, so just + # store a dummy comment line, to avoid errors with the Makefile + # "include basename.Plo" scheme. + echo "#dummy" > "$depfile" + fi + rm -f "$tmpdepfile" + ;; + +aix) + # The C for AIX Compiler uses -M and outputs the dependencies + # in a .u file. In older versions, this file always lives in the + # current directory. Also, the AIX compiler puts `$object:' at the + # start of each line; $object doesn't have directory information. + # Version 6 uses the directory in both cases. + dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` + test "x$dir" = "x$object" && dir= + base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` + if test "$libtool" = yes; then + tmpdepfile1=$dir$base.u + tmpdepfile2=$base.u + tmpdepfile3=$dir.libs/$base.u + "$@" -Wc,-M + else + tmpdepfile1=$dir$base.u + tmpdepfile2=$dir$base.u + tmpdepfile3=$dir$base.u + "$@" -M + fi + stat=$? + + if test $stat -eq 0; then : + else + rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" + exit $stat + fi + + for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" + do + test -f "$tmpdepfile" && break + done + if test -f "$tmpdepfile"; then + # Each line is of the form `foo.o: dependent.h'. + # Do two passes, one to just change these to + # `$object: dependent.h' and one to simply `dependent.h:'. + sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile" + # That's a tab and a space in the []. + sed -e 's,^.*\.[a-z]*:[ ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile" + else + # The sourcefile does not contain any dependencies, so just + # store a dummy comment line, to avoid errors with the Makefile + # "include basename.Plo" scheme. + echo "#dummy" > "$depfile" + fi + rm -f "$tmpdepfile" + ;; + +icc) + # Intel's C compiler understands `-MD -MF file'. However on + # icc -MD -MF foo.d -c -o sub/foo.o sub/foo.c + # ICC 7.0 will fill foo.d with something like + # foo.o: sub/foo.c + # foo.o: sub/foo.h + # which is wrong. We want: + # sub/foo.o: sub/foo.c + # sub/foo.o: sub/foo.h + # sub/foo.c: + # sub/foo.h: + # ICC 7.1 will output + # foo.o: sub/foo.c sub/foo.h + # and will wrap long lines using \ : + # foo.o: sub/foo.c ... \ + # sub/foo.h ... \ + # ... + + "$@" -MD -MF "$tmpdepfile" + stat=$? + if test $stat -eq 0; then : + else + rm -f "$tmpdepfile" + exit $stat + fi + rm -f "$depfile" + # Each line is of the form `foo.o: dependent.h', + # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'. + # Do two passes, one to just change these to + # `$object: dependent.h' and one to simply `dependent.h:'. + sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile" + # Some versions of the HPUX 10.20 sed can't process this invocation + # correctly. Breaking it into two sed invocations is a workaround. + sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" | + sed -e 's/$/ :/' >> "$depfile" + rm -f "$tmpdepfile" + ;; + +hp2) + # The "hp" stanza above does not work with aCC (C++) and HP's ia64 + # compilers, which have integrated preprocessors. The correct option + # to use with these is +Maked; it writes dependencies to a file named + # 'foo.d', which lands next to the object file, wherever that + # happens to be. + # Much of this is similar to the tru64 case; see comments there. + dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` + test "x$dir" = "x$object" && dir= + base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` + if test "$libtool" = yes; then + tmpdepfile1=$dir$base.d + tmpdepfile2=$dir.libs/$base.d + "$@" -Wc,+Maked + else + tmpdepfile1=$dir$base.d + tmpdepfile2=$dir$base.d + "$@" +Maked + fi + stat=$? + if test $stat -eq 0; then : + else + rm -f "$tmpdepfile1" "$tmpdepfile2" + exit $stat + fi + + for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" + do + test -f "$tmpdepfile" && break + done + if test -f "$tmpdepfile"; then + sed -e "s,^.*\.[a-z]*:,$object:," "$tmpdepfile" > "$depfile" + # Add `dependent.h:' lines. + sed -ne '2,${ + s/^ *// + s/ \\*$// + s/$/:/ + p + }' "$tmpdepfile" >> "$depfile" + else + echo "#dummy" > "$depfile" + fi + rm -f "$tmpdepfile" "$tmpdepfile2" + ;; + +tru64) + # The Tru64 compiler uses -MD to generate dependencies as a side + # effect. `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'. + # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put + # dependencies in `foo.d' instead, so we check for that too. + # Subdirectories are respected. + dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` + test "x$dir" = "x$object" && dir= + base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` + + if test "$libtool" = yes; then + # With Tru64 cc, shared objects can also be used to make a + # static library. This mechanism is used in libtool 1.4 series to + # handle both shared and static libraries in a single compilation. + # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d. + # + # With libtool 1.5 this exception was removed, and libtool now + # generates 2 separate objects for the 2 libraries. These two + # compilations output dependencies in $dir.libs/$base.o.d and + # in $dir$base.o.d. We have to check for both files, because + # one of the two compilations can be disabled. We should prefer + # $dir$base.o.d over $dir.libs/$base.o.d because the latter is + # automatically cleaned when .libs/ is deleted, while ignoring + # the former would cause a distcleancheck panic. + tmpdepfile1=$dir.libs/$base.lo.d # libtool 1.4 + tmpdepfile2=$dir$base.o.d # libtool 1.5 + tmpdepfile3=$dir.libs/$base.o.d # libtool 1.5 + tmpdepfile4=$dir.libs/$base.d # Compaq CCC V6.2-504 + "$@" -Wc,-MD + else + tmpdepfile1=$dir$base.o.d + tmpdepfile2=$dir$base.d + tmpdepfile3=$dir$base.d + tmpdepfile4=$dir$base.d + "$@" -MD + fi + + stat=$? + if test $stat -eq 0; then : + else + rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4" + exit $stat + fi + + for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4" + do + test -f "$tmpdepfile" && break + done + if test -f "$tmpdepfile"; then + sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile" + # That's a tab and a space in the []. + sed -e 's,^.*\.[a-z]*:[ ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile" + else + echo "#dummy" > "$depfile" + fi + rm -f "$tmpdepfile" + ;; + +#nosideeffect) + # This comment above is used by automake to tell side-effect + # dependency tracking mechanisms from slower ones. + +dashmstdout) + # Important note: in order to support this mode, a compiler *must* + # always write the preprocessed file to stdout, regardless of -o. + "$@" || exit $? + + # Remove the call to Libtool. + if test "$libtool" = yes; then + while test "X$1" != 'X--mode=compile'; do + shift + done + shift + fi + + # Remove `-o $object'. + IFS=" " + for arg + do + case $arg in + -o) + shift + ;; + $object) + shift + ;; + *) + set fnord "$@" "$arg" + shift # fnord + shift # $arg + ;; + esac + done + + test -z "$dashmflag" && dashmflag=-M + # Require at least two characters before searching for `:' + # in the target name. This is to cope with DOS-style filenames: + # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise. + "$@" $dashmflag | + sed 's:^[ ]*[^: ][^:][^:]*\:[ ]*:'"$object"'\: :' > "$tmpdepfile" + rm -f "$depfile" + cat < "$tmpdepfile" > "$depfile" + tr ' ' ' +' < "$tmpdepfile" | \ +## Some versions of the HPUX 10.20 sed can't process this invocation +## correctly. Breaking it into two sed invocations is a workaround. + sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" + rm -f "$tmpdepfile" + ;; + +dashXmstdout) + # This case only exists to satisfy depend.m4. It is never actually + # run, as this mode is specially recognized in the preamble. + exit 1 + ;; + +makedepend) + "$@" || exit $? + # Remove any Libtool call + if test "$libtool" = yes; then + while test "X$1" != 'X--mode=compile'; do + shift + done + shift + fi + # X makedepend + shift + cleared=no eat=no + for arg + do + case $cleared in + no) + set ""; shift + cleared=yes ;; + esac + if test $eat = yes; then + eat=no + continue + fi + case "$arg" in + -D*|-I*) + set fnord "$@" "$arg"; shift ;; + # Strip any option that makedepend may not understand. Remove + # the object too, otherwise makedepend will parse it as a source file. + -arch) + eat=yes ;; + -*|$object) + ;; + *) + set fnord "$@" "$arg"; shift ;; + esac + done + obj_suffix=`echo "$object" | sed 's/^.*\././'` + touch "$tmpdepfile" + ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@" + rm -f "$depfile" + cat < "$tmpdepfile" > "$depfile" + sed '1,2d' "$tmpdepfile" | tr ' ' ' +' | \ +## Some versions of the HPUX 10.20 sed can't process this invocation +## correctly. Breaking it into two sed invocations is a workaround. + sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" + rm -f "$tmpdepfile" "$tmpdepfile".bak + ;; + +cpp) + # Important note: in order to support this mode, a compiler *must* + # always write the preprocessed file to stdout. + "$@" || exit $? + + # Remove the call to Libtool. + if test "$libtool" = yes; then + while test "X$1" != 'X--mode=compile'; do + shift + done + shift + fi + + # Remove `-o $object'. + IFS=" " + for arg + do + case $arg in + -o) + shift + ;; + $object) + shift + ;; + *) + set fnord "$@" "$arg" + shift # fnord + shift # $arg + ;; + esac + done + + "$@" -E | + sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ + -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' | + sed '$ s: \\$::' > "$tmpdepfile" + rm -f "$depfile" + echo "$object : \\" > "$depfile" + cat < "$tmpdepfile" >> "$depfile" + sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile" + rm -f "$tmpdepfile" + ;; + +msvisualcpp) + # Important note: in order to support this mode, a compiler *must* + # always write the preprocessed file to stdout. + "$@" || exit $? + + # Remove the call to Libtool. + if test "$libtool" = yes; then + while test "X$1" != 'X--mode=compile'; do + shift + done + shift + fi + + IFS=" " + for arg + do + case "$arg" in + -o) + shift + ;; + $object) + shift + ;; + "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") + set fnord "$@" + shift + shift + ;; + *) + set fnord "$@" "$arg" + shift + shift + ;; + esac + done + "$@" -E 2>/dev/null | + sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" + rm -f "$depfile" + echo "$object : \\" > "$depfile" + sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s:: \1 \\:p' >> "$depfile" + echo " " >> "$depfile" + sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" + rm -f "$tmpdepfile" + ;; + +msvcmsys) + # This case exists only to let depend.m4 do its work. It works by + # looking at the text of this script. This case will never be run, + # since it is checked for above. + exit 1 + ;; + +none) + exec "$@" + ;; + +*) + echo "Unknown depmode $depmode" 1>&2 + exit 1 + ;; +esac + +exit 0 + +# Local Variables: +# mode: shell-script +# sh-indentation: 2 +# eval: (add-hook 'write-file-hooks 'time-stamp) +# time-stamp-start: "scriptversion=" +# time-stamp-format: "%:y-%02m-%02d.%02H" +# time-stamp-time-zone: "UTC" +# time-stamp-end: "; # UTC" +# End: diff --git a/dynamic.c b/dynamic.c new file mode 100644 index 0000000..830b227 --- /dev/null +++ b/dynamic.c @@ -0,0 +1,396 @@ +/* + * dynamic.c -- dynamic address mapper + * + * part of TAYGA + * Copyright (C) 2010 Nathan Lutchansky + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include + +#define MAP_FILE "dynamic.map" +#define TMP_MAP_FILE "dynamic.map~~" + +extern struct config *gcfg; +extern time_t now; + +static struct map_dynamic *alloc_map_dynamic(const struct in6_addr *addr6, + const struct in_addr *addr4, struct free_addr *f) +{ + struct map_dynamic *d; + uint32_t a = ntohl(addr4->s_addr); + + d = (struct map_dynamic *)malloc(sizeof(struct map_dynamic)); + if (!d) { + slog(LOG_CRIT, "Unable to allocate memory\n"); + return NULL; + } + memset(d, 0, sizeof(struct map_dynamic)); + INIT_LIST_HEAD(&d->list); + + d->map4.type = MAP_TYPE_DYNAMIC_HOST; + d->map4.addr = *addr4; + d->map4.prefix_len = 32; + calc_ip4_mask(&d->map4.mask, NULL, 32); + INIT_LIST_HEAD(&d->map4.list); + + d->map6.type = MAP_TYPE_DYNAMIC_HOST; + d->map6.addr = *addr6; + d->map6.prefix_len = 128; + calc_ip6_mask(&d->map6.mask, NULL, 128); + INIT_LIST_HEAD(&d->map6.list); + + d->free.addr = a; + d->free.count = f->count - (a - f->addr); + f->count = a - f->addr - 1; + INIT_LIST_HEAD(&d->free.list); + list_add(&d->free.list, &f->list); + + return d; +} + +static void move_to_mapped(struct map_dynamic *d, struct dynamic_pool *pool) +{ + insert_map4(&d->map4, NULL); + insert_map6(&d->map6, NULL); + list_add(&d->list, &pool->mapped_list); +} + +static void move_to_dormant(struct map_dynamic *d, struct dynamic_pool *pool) +{ + struct list_head *entry; + struct map_dynamic *s; + + list_del(&d->map4.list); + list_del(&d->map6.list); + + if (list_empty(&pool->dormant_list)) { + list_add_tail(&d->list, &pool->dormant_list); + return; + } + + s = list_entry(pool->dormant_list.prev, struct map_dynamic, list); + if (s->last_use >= d->last_use) { + list_add_tail(&d->list, &pool->dormant_list); + return; + } + + list_for_each(entry, &pool->dormant_list) { + s = list_entry(entry, struct map_dynamic, list); + if (s->last_use < d->last_use) + break; + } + list_add_tail(&d->list, entry); +} + +static void print_dyn_change(char *str, struct map_dynamic *d) +{ + char addrbuf4[INET_ADDRSTRLEN]; + char addrbuf6[INET6_ADDRSTRLEN]; + + inet_ntop(AF_INET, &d->map4.addr, addrbuf4, sizeof(addrbuf4)); + inet_ntop(AF_INET6, &d->map6.addr, addrbuf6, sizeof(addrbuf6)); + slog(LOG_DEBUG, "%s pool address %s (%s)\n", str, addrbuf4, addrbuf6); +} + +struct map6 *assign_dynamic(const struct in6_addr *addr6) +{ + struct dynamic_pool *pool; + struct list_head *entry; + struct free_addr *f; + uint32_t i, addr, base, max; + struct in_addr addr4; + struct map4 *m4; + struct map_dynamic *d; + + pool = gcfg->dynamic_pool; + if (!pool) + return NULL; + + list_for_each(entry, &pool->dormant_list) { + d = list_entry(entry, struct map_dynamic, list); + if (IN6_ARE_ADDR_EQUAL(addr6, &d->map6.addr)) { + print_dyn_change("reactivated dormant", d); + goto activate; + } + } + + base = 0; + max = (1 << (32 - pool->map4.prefix_len)) - 1; + + for (i = 0; i < 4; ++i) { + base += addr6->s6_addr32[i]; + while (base & ~max) + base = (base & max) + + (base >> (32 - pool->map4.prefix_len)); + } + + for (i = 0, entry = NULL; i <= max; ++i) { + addr = pool->free_head.addr | ((base + i) & max); + if (!entry || addr == pool->free_head.addr) + entry = pool->free_list.next; + for (;;) { + f = list_entry(entry, struct free_addr, list); + if (f->addr + f->count >= addr) + break; + entry = entry->next; + } + if (f->addr >= addr) + continue; + addr4.s_addr = htonl(addr); + m4 = find_map4(&addr4); + if (m4 == &pool->map4) { + d = alloc_map_dynamic(addr6, &addr4, f); + if (!d) + return NULL; + print_dyn_change("assigned new", d); + gcfg->map_write_pending = 1; + goto activate; + } + } + + if (list_empty(&pool->dormant_list)) + return NULL; + + d = list_entry(pool->dormant_list.prev, struct map_dynamic, list); + d->map6.addr = *addr6; + print_dyn_change("reassigned dormant", d); + gcfg->map_write_pending = 1; + +activate: + move_to_mapped(d, pool); + return &d->map6; +} + +static void load_map(struct dynamic_pool *pool, const struct in6_addr *addr6, + const struct in_addr *addr4, long int last_use) +{ + struct list_head *entry; + struct free_addr *f; + uint32_t addr; + struct map4 *m4; + struct map_dynamic *d; + char addrbuf4[INET_ADDRSTRLEN]; + char addrbuf6[INET6_ADDRSTRLEN]; + + if (pool->map4.addr.s_addr != (addr4->s_addr & + pool->map4.mask.s_addr)) { + inet_ntop(AF_INET, addr4, addrbuf4, sizeof(addrbuf4)); + slog(LOG_NOTICE, "Ignoring map for %s from %s/%s that lies " + "outside dynamic pool prefix\n", addrbuf4, + gcfg->data_dir, MAP_FILE); + return; + } + m4 = find_map4(addr4); + if (m4 != &pool->map4) { + inet_ntop(AF_INET, addr4, addrbuf4, sizeof(addrbuf4)); + slog(LOG_NOTICE, "Ignoring map for %s from %s/%s that " + "conflicts with statically-configured map\n", + addrbuf4, gcfg->data_dir, MAP_FILE); + return; + } + if (validate_ip6_addr(addr6) < 0) { + inet_ntop(AF_INET, addr4, addrbuf4, sizeof(addrbuf4)); + inet_ntop(AF_INET6, addr6, addrbuf6, sizeof(addrbuf6)); + slog(LOG_NOTICE, "Ignoring map for %s from %s/%s with " + "invalid IPv6 address %s\n", addrbuf4, + gcfg->data_dir, MAP_FILE, addrbuf6); + return; + } + if (find_map6(addr6)) { + inet_ntop(AF_INET6, addr6, addrbuf6, sizeof(addrbuf6)); + slog(LOG_NOTICE, "Ignoring map for %s from %s/%s that " + "conflicts with statically-configured map\n", + addrbuf6, gcfg->data_dir, MAP_FILE); + return; + } + addr = ntohl(addr4->s_addr); + list_for_each(entry, &pool->free_list) { + f = list_entry(entry, struct free_addr, list); + if (f->addr + f->count >= addr) + break; + } + if (entry == &pool->free_list || f->addr >= addr) { + inet_ntop(AF_INET, addr4, addrbuf4, sizeof(addrbuf4)); + slog(LOG_NOTICE, "Ignoring duplicate map for %s from %s/%s\n", + addrbuf4, gcfg->data_dir, MAP_FILE); + return; + } + d = alloc_map_dynamic(addr6, addr4, f); + if (!d) + return; + d->last_use = last_use; + move_to_dormant(d, pool); +} + +void load_dynamic(struct dynamic_pool *pool) +{ + FILE *in; + char line[512]; + char *s4, *s6, *stime, *end, *tokptr; + struct in_addr addr4; + struct in6_addr addr6; + long int last_use; + struct list_head *entry; + struct map_dynamic *d; + int count = 0; + + in = fopen(MAP_FILE, "r"); + if (!in) { + if (errno != ENOENT) + slog(LOG_ERR, "Unable to open %s/%s, ignoring: %s\n", + gcfg->data_dir, MAP_FILE, + strerror(errno)); + return; + } + while (fgets(line, sizeof(line), in)) { + if (strlen(line) + 1 == sizeof(line)) { + slog(LOG_ERR, "Ignoring oversized line in %s/%s\n", + gcfg->data_dir, MAP_FILE); + continue; + } + s4 = strtok_r(line, DELIM, &tokptr); + if (!s4 || *s4 == '#') + continue; + s6 = strtok_r(NULL, DELIM, &tokptr); + if (!s6) + goto malformed; + stime = strtok_r(NULL, DELIM, &tokptr); + if (!stime) + goto malformed; + end = strtok_r(NULL, DELIM, &tokptr); + if (end) + goto malformed; + if (!inet_pton(AF_INET, s4, &addr4) || + !inet_pton(AF_INET6, s6, &addr6)) + goto malformed; + last_use = strtol(stime, &end, 10); + if (last_use <= 0 || *end) + goto malformed; + load_map(pool, &addr6, &addr4, last_use); + continue; +malformed: + slog(LOG_ERR, "Ignoring malformed line in %s/%s\n", + gcfg->data_dir, MAP_FILE); + } + fclose(in); + + time(&now); + last_use = 0; + list_for_each(entry, &pool->dormant_list) { + d = list_entry(entry, struct map_dynamic, list); + if (d->last_use > last_use) + last_use = d->last_use; + ++count; + } + slog(LOG_INFO, "Loaded %d dynamic %s from %s/%s\n", count, + count == 1 ? "map" : "maps", + gcfg->data_dir, MAP_FILE); + if (last_use > now) { + slog(LOG_DEBUG, "Note: maps in %s/%s are dated in the future\n", + gcfg->data_dir, MAP_FILE); + list_for_each(entry, &pool->dormant_list) { + d = list_entry(entry, struct map_dynamic, list); + d->last_use = now - gcfg->dyn_min_lease; + } + } else { + while (!list_empty(&pool->dormant_list)) { + d = list_entry(pool->dormant_list.next, + struct map_dynamic, list); + if (d->last_use + gcfg->dyn_min_lease < now) + break; + move_to_mapped(d, pool); + } + } +} + +static void write_to_file(struct dynamic_pool *pool) +{ + FILE *out; + struct list_head *entry; + struct map_dynamic *d; + char addrbuf4[INET_ADDRSTRLEN]; + char addrbuf6[INET6_ADDRSTRLEN]; + + out = fopen(TMP_MAP_FILE, "w"); + if (!out) { + slog(LOG_ERR, "Unable to open %s/%s for writing: %s\n", + gcfg->data_dir, TMP_MAP_FILE, + strerror(errno)); + return; + } + fprintf(out, "###\n###\n### TAYGA dynamic map database\n###\n" + "### You can edit this (carefully!) as long as " + "you shut down TAYGA first\n###\n###\n" + "### Last written: %s###\n###\n\n", + asctime(gmtime(&now))); + entry = pool->mapped_list.next; + while (entry != &pool->dormant_list) { + if (entry == &pool->mapped_list) { + entry = pool->dormant_list.next; + continue; + } + d = list_entry(entry, struct map_dynamic, list); + inet_ntop(AF_INET, &d->map4.addr, addrbuf4, sizeof(addrbuf4)); + inet_ntop(AF_INET6, &d->map6.addr, addrbuf6, sizeof(addrbuf6)); + fprintf(out, "%s\t%s\t%ld\n", addrbuf4, addrbuf6, + d->cache_entry ? + d->cache_entry->last_use : d->last_use); + entry = entry->next; + } + fclose(out); + if (rename(TMP_MAP_FILE, MAP_FILE) < 0) { + slog(LOG_ERR, "Unable to rename %s/%s to %s/%s: %s\n", + gcfg->data_dir, TMP_MAP_FILE, + gcfg->data_dir, MAP_FILE, + strerror(errno)); + unlink(TMP_MAP_FILE); + } +} + +void dynamic_maint(struct dynamic_pool *pool, int shutdown) +{ + struct list_head *entry, *next; + struct map_dynamic *d; + struct free_addr *f; + + list_for_each_safe(entry, next, &pool->mapped_list) { + d = list_entry(entry, struct map_dynamic, list); + if (d->cache_entry) + continue; + if (d->last_use + gcfg->dyn_min_lease < now) { + print_dyn_change("unmapped dormant", d); + move_to_dormant(d, pool); + } + } + while (!list_empty(&pool->dormant_list)) { + d = list_entry(pool->dormant_list.prev, + struct map_dynamic, list); + if (d->last_use + gcfg->dyn_max_lease >= now) + break; + f = list_entry(d->free.list.prev, struct free_addr, list); + f->count += d->free.count + 1; + list_del(&d->free.list); + list_del(&d->list); + free(d); + } + if (gcfg->data_dir[0]) { + if (shutdown || gcfg->map_write_pending || + gcfg->last_map_write + + gcfg->max_commit_delay < now || + gcfg->last_map_write > now) { + write_to_file(pool); + gcfg->last_map_write = now; + gcfg->map_write_pending = 0; + } + } +} diff --git a/install-sh b/install-sh new file mode 100755 index 0000000..6781b98 --- /dev/null +++ b/install-sh @@ -0,0 +1,520 @@ +#!/bin/sh +# install - install a program, script, or datafile + +scriptversion=2009-04-28.21; # UTC + +# This originates from X11R5 (mit/util/scripts/install.sh), which was +# later released in X11R6 (xc/config/util/install.sh) with the +# following copyright and license. +# +# Copyright (C) 1994 X Consortium +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to +# deal in the Software without restriction, including without limitation the +# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or +# sell copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in +# all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- +# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +# +# Except as contained in this notice, the name of the X Consortium shall not +# be used in advertising or otherwise to promote the sale, use or other deal- +# ings in this Software without prior written authorization from the X Consor- +# tium. +# +# +# FSF changes to this file are in the public domain. +# +# Calling this script install-sh is preferred over install.sh, to prevent +# `make' implicit rules from creating a file called install from it +# when there is no Makefile. +# +# This script is compatible with the BSD install script, but was written +# from scratch. + +nl=' +' +IFS=" "" $nl" + +# set DOITPROG to echo to test this script + +# Don't use :- since 4.3BSD and earlier shells don't like it. +doit=${DOITPROG-} +if test -z "$doit"; then + doit_exec=exec +else + doit_exec=$doit +fi + +# Put in absolute file names if you don't have them in your path; +# or use environment vars. + +chgrpprog=${CHGRPPROG-chgrp} +chmodprog=${CHMODPROG-chmod} +chownprog=${CHOWNPROG-chown} +cmpprog=${CMPPROG-cmp} +cpprog=${CPPROG-cp} +mkdirprog=${MKDIRPROG-mkdir} +mvprog=${MVPROG-mv} +rmprog=${RMPROG-rm} +stripprog=${STRIPPROG-strip} + +posix_glob='?' +initialize_posix_glob=' + test "$posix_glob" != "?" || { + if (set -f) 2>/dev/null; then + posix_glob= + else + posix_glob=: + fi + } +' + +posix_mkdir= + +# Desired mode of installed file. +mode=0755 + +chgrpcmd= +chmodcmd=$chmodprog +chowncmd= +mvcmd=$mvprog +rmcmd="$rmprog -f" +stripcmd= + +src= +dst= +dir_arg= +dst_arg= + +copy_on_change=false +no_target_directory= + +usage="\ +Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE + or: $0 [OPTION]... SRCFILES... DIRECTORY + or: $0 [OPTION]... -t DIRECTORY SRCFILES... + or: $0 [OPTION]... -d DIRECTORIES... + +In the 1st form, copy SRCFILE to DSTFILE. +In the 2nd and 3rd, copy all SRCFILES to DIRECTORY. +In the 4th, create DIRECTORIES. + +Options: + --help display this help and exit. + --version display version info and exit. + + -c (ignored) + -C install only if different (preserve the last data modification time) + -d create directories instead of installing files. + -g GROUP $chgrpprog installed files to GROUP. + -m MODE $chmodprog installed files to MODE. + -o USER $chownprog installed files to USER. + -s $stripprog installed files. + -t DIRECTORY install into DIRECTORY. + -T report an error if DSTFILE is a directory. + +Environment variables override the default commands: + CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG + RMPROG STRIPPROG +" + +while test $# -ne 0; do + case $1 in + -c) ;; + + -C) copy_on_change=true;; + + -d) dir_arg=true;; + + -g) chgrpcmd="$chgrpprog $2" + shift;; + + --help) echo "$usage"; exit $?;; + + -m) mode=$2 + case $mode in + *' '* | *' '* | *' +'* | *'*'* | *'?'* | *'['*) + echo "$0: invalid mode: $mode" >&2 + exit 1;; + esac + shift;; + + -o) chowncmd="$chownprog $2" + shift;; + + -s) stripcmd=$stripprog;; + + -t) dst_arg=$2 + shift;; + + -T) no_target_directory=true;; + + --version) echo "$0 $scriptversion"; exit $?;; + + --) shift + break;; + + -*) echo "$0: invalid option: $1" >&2 + exit 1;; + + *) break;; + esac + shift +done + +if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then + # When -d is used, all remaining arguments are directories to create. + # When -t is used, the destination is already specified. + # Otherwise, the last argument is the destination. Remove it from $@. + for arg + do + if test -n "$dst_arg"; then + # $@ is not empty: it contains at least $arg. + set fnord "$@" "$dst_arg" + shift # fnord + fi + shift # arg + dst_arg=$arg + done +fi + +if test $# -eq 0; then + if test -z "$dir_arg"; then + echo "$0: no input file specified." >&2 + exit 1 + fi + # It's OK to call `install-sh -d' without argument. + # This can happen when creating conditional directories. + exit 0 +fi + +if test -z "$dir_arg"; then + trap '(exit $?); exit' 1 2 13 15 + + # Set umask so as not to create temps with too-generous modes. + # However, 'strip' requires both read and write access to temps. + case $mode in + # Optimize common cases. + *644) cp_umask=133;; + *755) cp_umask=22;; + + *[0-7]) + if test -z "$stripcmd"; then + u_plus_rw= + else + u_plus_rw='% 200' + fi + cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;; + *) + if test -z "$stripcmd"; then + u_plus_rw= + else + u_plus_rw=,u+rw + fi + cp_umask=$mode$u_plus_rw;; + esac +fi + +for src +do + # Protect names starting with `-'. + case $src in + -*) src=./$src;; + esac + + if test -n "$dir_arg"; then + dst=$src + dstdir=$dst + test -d "$dstdir" + dstdir_status=$? + else + + # Waiting for this to be detected by the "$cpprog $src $dsttmp" command + # might cause directories to be created, which would be especially bad + # if $src (and thus $dsttmp) contains '*'. + if test ! -f "$src" && test ! -d "$src"; then + echo "$0: $src does not exist." >&2 + exit 1 + fi + + if test -z "$dst_arg"; then + echo "$0: no destination specified." >&2 + exit 1 + fi + + dst=$dst_arg + # Protect names starting with `-'. + case $dst in + -*) dst=./$dst;; + esac + + # If destination is a directory, append the input filename; won't work + # if double slashes aren't ignored. + if test -d "$dst"; then + if test -n "$no_target_directory"; then + echo "$0: $dst_arg: Is a directory" >&2 + exit 1 + fi + dstdir=$dst + dst=$dstdir/`basename "$src"` + dstdir_status=0 + else + # Prefer dirname, but fall back on a substitute if dirname fails. + dstdir=` + (dirname "$dst") 2>/dev/null || + expr X"$dst" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \ + X"$dst" : 'X\(//\)[^/]' \| \ + X"$dst" : 'X\(//\)$' \| \ + X"$dst" : 'X\(/\)' \| . 2>/dev/null || + echo X"$dst" | + sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ + s//\1/ + q + } + /^X\(\/\/\)[^/].*/{ + s//\1/ + q + } + /^X\(\/\/\)$/{ + s//\1/ + q + } + /^X\(\/\).*/{ + s//\1/ + q + } + s/.*/./; q' + ` + + test -d "$dstdir" + dstdir_status=$? + fi + fi + + obsolete_mkdir_used=false + + if test $dstdir_status != 0; then + case $posix_mkdir in + '') + # Create intermediate dirs using mode 755 as modified by the umask. + # This is like FreeBSD 'install' as of 1997-10-28. + umask=`umask` + case $stripcmd.$umask in + # Optimize common cases. + *[2367][2367]) mkdir_umask=$umask;; + .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;; + + *[0-7]) + mkdir_umask=`expr $umask + 22 \ + - $umask % 100 % 40 + $umask % 20 \ + - $umask % 10 % 4 + $umask % 2 + `;; + *) mkdir_umask=$umask,go-w;; + esac + + # With -d, create the new directory with the user-specified mode. + # Otherwise, rely on $mkdir_umask. + if test -n "$dir_arg"; then + mkdir_mode=-m$mode + else + mkdir_mode= + fi + + posix_mkdir=false + case $umask in + *[123567][0-7][0-7]) + # POSIX mkdir -p sets u+wx bits regardless of umask, which + # is incompatible with FreeBSD 'install' when (umask & 300) != 0. + ;; + *) + tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$ + trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0 + + if (umask $mkdir_umask && + exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1 + then + if test -z "$dir_arg" || { + # Check for POSIX incompatibilities with -m. + # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or + # other-writeable bit of parent directory when it shouldn't. + # FreeBSD 6.1 mkdir -m -p sets mode of existing directory. + ls_ld_tmpdir=`ls -ld "$tmpdir"` + case $ls_ld_tmpdir in + d????-?r-*) different_mode=700;; + d????-?--*) different_mode=755;; + *) false;; + esac && + $mkdirprog -m$different_mode -p -- "$tmpdir" && { + ls_ld_tmpdir_1=`ls -ld "$tmpdir"` + test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1" + } + } + then posix_mkdir=: + fi + rmdir "$tmpdir/d" "$tmpdir" + else + # Remove any dirs left behind by ancient mkdir implementations. + rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null + fi + trap '' 0;; + esac;; + esac + + if + $posix_mkdir && ( + umask $mkdir_umask && + $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir" + ) + then : + else + + # The umask is ridiculous, or mkdir does not conform to POSIX, + # or it failed possibly due to a race condition. Create the + # directory the slow way, step by step, checking for races as we go. + + case $dstdir in + /*) prefix='/';; + -*) prefix='./';; + *) prefix='';; + esac + + eval "$initialize_posix_glob" + + oIFS=$IFS + IFS=/ + $posix_glob set -f + set fnord $dstdir + shift + $posix_glob set +f + IFS=$oIFS + + prefixes= + + for d + do + test -z "$d" && continue + + prefix=$prefix$d + if test -d "$prefix"; then + prefixes= + else + if $posix_mkdir; then + (umask=$mkdir_umask && + $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break + # Don't fail if two instances are running concurrently. + test -d "$prefix" || exit 1 + else + case $prefix in + *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;; + *) qprefix=$prefix;; + esac + prefixes="$prefixes '$qprefix'" + fi + fi + prefix=$prefix/ + done + + if test -n "$prefixes"; then + # Don't fail if two instances are running concurrently. + (umask $mkdir_umask && + eval "\$doit_exec \$mkdirprog $prefixes") || + test -d "$dstdir" || exit 1 + obsolete_mkdir_used=true + fi + fi + fi + + if test -n "$dir_arg"; then + { test -z "$chowncmd" || $doit $chowncmd "$dst"; } && + { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } && + { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false || + test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1 + else + + # Make a couple of temp file names in the proper directory. + dsttmp=$dstdir/_inst.$$_ + rmtmp=$dstdir/_rm.$$_ + + # Trap to clean up those temp files at exit. + trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0 + + # Copy the file name to the temp name. + (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") && + + # and set any options; do chmod last to preserve setuid bits. + # + # If any of these fail, we abort the whole thing. If we want to + # ignore errors from any of these, just make sure not to ignore + # errors from the above "$doit $cpprog $src $dsttmp" command. + # + { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } && + { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } && + { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } && + { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } && + + # If -C, don't bother to copy if it wouldn't change the file. + if $copy_on_change && + old=`LC_ALL=C ls -dlL "$dst" 2>/dev/null` && + new=`LC_ALL=C ls -dlL "$dsttmp" 2>/dev/null` && + + eval "$initialize_posix_glob" && + $posix_glob set -f && + set X $old && old=:$2:$4:$5:$6 && + set X $new && new=:$2:$4:$5:$6 && + $posix_glob set +f && + + test "$old" = "$new" && + $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1 + then + rm -f "$dsttmp" + else + # Rename the file to the real destination. + $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null || + + # The rename failed, perhaps because mv can't rename something else + # to itself, or perhaps because mv is so ancient that it does not + # support -f. + { + # Now remove or move aside any old file at destination location. + # We try this two ways since rm can't unlink itself on some + # systems and the destination file might be busy for other + # reasons. In this case, the final cleanup might fail but the new + # file should still install successfully. + { + test ! -f "$dst" || + $doit $rmcmd -f "$dst" 2>/dev/null || + { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null && + { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; } + } || + { echo "$0: cannot unlink or rename $dst" >&2 + (exit 1); exit 1 + } + } && + + # Now rename the file to the real destination. + $doit $mvcmd "$dsttmp" "$dst" + } + fi || exit 1 + + trap '' 0 + fi +done + +# Local variables: +# eval: (add-hook 'write-file-hooks 'time-stamp) +# time-stamp-start: "scriptversion=" +# time-stamp-format: "%:y-%02m-%02d.%02H" +# time-stamp-time-zone: "UTC" +# time-stamp-end: "; # UTC" +# End: diff --git a/list.h b/list.h new file mode 100644 index 0000000..13c8f29 --- /dev/null +++ b/list.h @@ -0,0 +1,80 @@ +/* Linux-style linked list implementation */ + +#ifndef __LIST_H__ +#define __LIST_H__ + +#include /* for offsetof() macro */ + +struct list_head { + struct list_head *next; + struct list_head *prev; +}; + +/* Declare an empty list */ +#define LIST_HEAD(x) struct list_head x = { &x, &x } + +/* Initialize an empty list (required for all malloc'd list_heads) */ +static inline void INIT_LIST_HEAD(struct list_head *x) +{ + x->next = x; + x->prev = x; +} + +/* Remove an entry from its current list (if any) and insert it into the + * beginning of the given list */ +static inline void list_add(struct list_head *x, struct list_head *head) +{ + x->next->prev = x->prev; + x->prev->next = x->next; + x->next = head->next; + x->prev = head; + head->next = x; + x->next->prev = x; +} + +/* Remove an entry from its current list (if any) and insert it into the + * end of the given list */ +static inline void list_add_tail(struct list_head *x, struct list_head *head) +{ + x->next->prev = x->prev; + x->prev->next = x->next; + x->prev = head->prev; + x->next = head; + head->prev = x; + x->prev->next = x; +} + +/* Remove an entry from its current list and reinitialize it */ +static inline void list_del(struct list_head *x) +{ + x->next->prev = x->prev; + x->prev->next = x->next; + x->next = x; + x->prev = x; +} + +#define list_del_init list_del +#define list_move list_add +#define list_move_tail list_add_tail + +/* Test if list is empty (contains no other entries) */ +static inline int list_empty(const struct list_head *x) +{ + return x->next == x; +} + +/* Get a pointer to the object containing x, which is of type "type" and + * embeds x as a field called "field" */ +#define list_entry(x, type, field) ({ \ + const typeof( ((type *)0)->field ) *__mptr = (x); \ + (type *)( (char *)__mptr - offsetof(type, field) );}) + +/* Iterate over all items in the list */ +#define list_for_each(x, head) \ + for (x = (head)->next; x != (head); x = x->next) + +/* Iterate over all items in the list, possibly deleting some */ +#define list_for_each_safe(x, n, head) \ + for (x = (head)->next, n = x->next; x != (head); x = n, n = x->next) + +#endif /* __LIST_H__ */ diff --git a/missing b/missing new file mode 100755 index 0000000..28055d2 --- /dev/null +++ b/missing @@ -0,0 +1,376 @@ +#! /bin/sh +# Common stub for a few missing GNU programs while installing. + +scriptversion=2009-04-28.21; # UTC + +# Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006, +# 2008, 2009 Free Software Foundation, Inc. +# Originally by Fran,cois Pinard , 1996. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# As a special exception to the GNU General Public License, if you +# distribute this file as part of a program that contains a +# configuration script generated by Autoconf, you may include it under +# the same distribution terms that you use for the rest of that program. + +if test $# -eq 0; then + echo 1>&2 "Try \`$0 --help' for more information" + exit 1 +fi + +run=: +sed_output='s/.* --output[ =]\([^ ]*\).*/\1/p' +sed_minuso='s/.* -o \([^ ]*\).*/\1/p' + +# In the cases where this matters, `missing' is being run in the +# srcdir already. +if test -f configure.ac; then + configure_ac=configure.ac +else + configure_ac=configure.in +fi + +msg="missing on your system" + +case $1 in +--run) + # Try to run requested program, and just exit if it succeeds. + run= + shift + "$@" && exit 0 + # Exit code 63 means version mismatch. This often happens + # when the user try to use an ancient version of a tool on + # a file that requires a minimum version. In this case we + # we should proceed has if the program had been absent, or + # if --run hadn't been passed. + if test $? = 63; then + run=: + msg="probably too old" + fi + ;; + + -h|--h|--he|--hel|--help) + echo "\ +$0 [OPTION]... PROGRAM [ARGUMENT]... + +Handle \`PROGRAM [ARGUMENT]...' for when PROGRAM is missing, or return an +error status if there is no known handling for PROGRAM. + +Options: + -h, --help display this help and exit + -v, --version output version information and exit + --run try to run the given command, and emulate it if it fails + +Supported PROGRAM values: + aclocal touch file \`aclocal.m4' + autoconf touch file \`configure' + autoheader touch file \`config.h.in' + autom4te touch the output file, or create a stub one + automake touch all \`Makefile.in' files + bison create \`y.tab.[ch]', if possible, from existing .[ch] + flex create \`lex.yy.c', if possible, from existing .c + help2man touch the output file + lex create \`lex.yy.c', if possible, from existing .c + makeinfo touch the output file + tar try tar, gnutar, gtar, then tar without non-portable flags + yacc create \`y.tab.[ch]', if possible, from existing .[ch] + +Version suffixes to PROGRAM as well as the prefixes \`gnu-', \`gnu', and +\`g' are ignored when checking the name. + +Send bug reports to ." + exit $? + ;; + + -v|--v|--ve|--ver|--vers|--versi|--versio|--version) + echo "missing $scriptversion (GNU Automake)" + exit $? + ;; + + -*) + echo 1>&2 "$0: Unknown \`$1' option" + echo 1>&2 "Try \`$0 --help' for more information" + exit 1 + ;; + +esac + +# normalize program name to check for. +program=`echo "$1" | sed ' + s/^gnu-//; t + s/^gnu//; t + s/^g//; t'` + +# Now exit if we have it, but it failed. Also exit now if we +# don't have it and --version was passed (most likely to detect +# the program). This is about non-GNU programs, so use $1 not +# $program. +case $1 in + lex*|yacc*) + # Not GNU programs, they don't have --version. + ;; + + tar*) + if test -n "$run"; then + echo 1>&2 "ERROR: \`tar' requires --run" + exit 1 + elif test "x$2" = "x--version" || test "x$2" = "x--help"; then + exit 1 + fi + ;; + + *) + if test -z "$run" && ($1 --version) > /dev/null 2>&1; then + # We have it, but it failed. + exit 1 + elif test "x$2" = "x--version" || test "x$2" = "x--help"; then + # Could not run --version or --help. This is probably someone + # running `$TOOL --version' or `$TOOL --help' to check whether + # $TOOL exists and not knowing $TOOL uses missing. + exit 1 + fi + ;; +esac + +# If it does not exist, or fails to run (possibly an outdated version), +# try to emulate it. +case $program in + aclocal*) + echo 1>&2 "\ +WARNING: \`$1' is $msg. You should only need it if + you modified \`acinclude.m4' or \`${configure_ac}'. You might want + to install the \`Automake' and \`Perl' packages. Grab them from + any GNU archive site." + touch aclocal.m4 + ;; + + autoconf*) + echo 1>&2 "\ +WARNING: \`$1' is $msg. You should only need it if + you modified \`${configure_ac}'. You might want to install the + \`Autoconf' and \`GNU m4' packages. Grab them from any GNU + archive site." + touch configure + ;; + + autoheader*) + echo 1>&2 "\ +WARNING: \`$1' is $msg. You should only need it if + you modified \`acconfig.h' or \`${configure_ac}'. You might want + to install the \`Autoconf' and \`GNU m4' packages. Grab them + from any GNU archive site." + files=`sed -n 's/^[ ]*A[CM]_CONFIG_HEADER(\([^)]*\)).*/\1/p' ${configure_ac}` + test -z "$files" && files="config.h" + touch_files= + for f in $files; do + case $f in + *:*) touch_files="$touch_files "`echo "$f" | + sed -e 's/^[^:]*://' -e 's/:.*//'`;; + *) touch_files="$touch_files $f.in";; + esac + done + touch $touch_files + ;; + + automake*) + echo 1>&2 "\ +WARNING: \`$1' is $msg. You should only need it if + you modified \`Makefile.am', \`acinclude.m4' or \`${configure_ac}'. + You might want to install the \`Automake' and \`Perl' packages. + Grab them from any GNU archive site." + find . -type f -name Makefile.am -print | + sed 's/\.am$/.in/' | + while read f; do touch "$f"; done + ;; + + autom4te*) + echo 1>&2 "\ +WARNING: \`$1' is needed, but is $msg. + You might have modified some files without having the + proper tools for further handling them. + You can get \`$1' as part of \`Autoconf' from any GNU + archive site." + + file=`echo "$*" | sed -n "$sed_output"` + test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"` + if test -f "$file"; then + touch $file + else + test -z "$file" || exec >$file + echo "#! /bin/sh" + echo "# Created by GNU Automake missing as a replacement of" + echo "# $ $@" + echo "exit 0" + chmod +x $file + exit 1 + fi + ;; + + bison*|yacc*) + echo 1>&2 "\ +WARNING: \`$1' $msg. You should only need it if + you modified a \`.y' file. 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You can get + \`Flex' from any GNU archive site." + rm -f lex.yy.c + if test $# -ne 1; then + eval LASTARG="\${$#}" + case $LASTARG in + *.l) + SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'` + if test -f "$SRCFILE"; then + cp "$SRCFILE" lex.yy.c + fi + ;; + esac + fi + if test ! -f lex.yy.c; then + echo 'main() { return 0; }' >lex.yy.c + fi + ;; + + help2man*) + echo 1>&2 "\ +WARNING: \`$1' is $msg. You should only need it if + you modified a dependency of a manual page. You may need the + \`Help2man' package in order for those modifications to take + effect. You can get \`Help2man' from any GNU archive site." + + file=`echo "$*" | sed -n "$sed_output"` + test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"` + if test -f "$file"; then + touch $file + else + test -z "$file" || exec >$file + echo ".ab help2man is required to generate this page" + exit $? + fi + ;; + + makeinfo*) + echo 1>&2 "\ +WARNING: \`$1' is $msg. You should only need it if + you modified a \`.texi' or \`.texinfo' file, or any other file + indirectly affecting the aspect of the manual. The spurious + call might also be the consequence of using a buggy \`make' (AIX, + DU, IRIX). You might want to install the \`Texinfo' package or + the \`GNU make' package. Grab either from any GNU archive site." + # The file to touch is that specified with -o ... + file=`echo "$*" | sed -n "$sed_output"` + test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"` + if test -z "$file"; then + # ... or it is the one specified with @setfilename ... + infile=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'` + file=`sed -n ' + /^@setfilename/{ + s/.* \([^ ]*\) *$/\1/ + p + q + }' $infile` + # ... or it is derived from the source name (dir/f.texi becomes f.info) + test -z "$file" && file=`echo "$infile" | sed 's,.*/,,;s,.[^.]*$,,'`.info + fi + # If the file does not exist, the user really needs makeinfo; + # let's fail without touching anything. + test -f $file || exit 1 + touch $file + ;; + + tar*) + shift + + # We have already tried tar in the generic part. + # Look for gnutar/gtar before invocation to avoid ugly error + # messages. + if (gnutar --version > /dev/null 2>&1); then + gnutar "$@" && exit 0 + fi + if (gtar --version > /dev/null 2>&1); then + gtar "$@" && exit 0 + fi + firstarg="$1" + if shift; then + case $firstarg in + *o*) + firstarg=`echo "$firstarg" | sed s/o//` + tar "$firstarg" "$@" && exit 0 + ;; + esac + case $firstarg in + *h*) + firstarg=`echo "$firstarg" | sed s/h//` + tar "$firstarg" "$@" && exit 0 + ;; + esac + fi + + echo 1>&2 "\ +WARNING: I can't seem to be able to run \`tar' with the given arguments. + You may want to install GNU tar or Free paxutils, or check the + command line arguments." + exit 1 + ;; + + *) + echo 1>&2 "\ +WARNING: \`$1' is needed, and is $msg. + You might have modified some files without having the + proper tools for further handling them. Check the \`README' file, + it often tells you about the needed prerequisites for installing + this package. You may also peek at any GNU archive site, in case + some other package would contain this missing \`$1' program." + exit 1 + ;; +esac + +exit 0 + +# Local variables: +# eval: (add-hook 'write-file-hooks 'time-stamp) +# time-stamp-start: "scriptversion=" +# time-stamp-format: "%:y-%02m-%02d.%02H" +# time-stamp-time-zone: "UTC" +# time-stamp-end: "; # UTC" +# End: diff --git a/nat64.c b/nat64.c new file mode 100644 index 0000000..a88f81d --- /dev/null +++ b/nat64.c @@ -0,0 +1,976 @@ +/* + * nat64.c -- IPv4/IPv6 header rewriting routines + * + * part of TAYGA + * Copyright (C) 2010 Nathan Lutchansky + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include + +extern struct config *gcfg; + +static uint16_t ip_checksum(void *d, int c) +{ + uint32_t sum = 0xffff; + uint16_t *p = d; + + while (c > 1) { + sum += *p++; + c -= 2; + } + + if (c) + sum += htons(*((uint8_t *)p) << 8); + + while (sum > 0xffff) + sum = (sum & 0xffff) + (sum >> 16); + + return ~sum; +} + +static uint16_t ones_add(uint16_t a, uint16_t b) +{ + uint32_t sum = (uint16_t)~a + (uint16_t)~b; + + return ~((sum & 0xffff) + (sum >> 16)); +} + +static uint16_t ip6_checksum(struct ip6 *ip6, uint32_t data_len, uint8_t proto) +{ + uint32_t sum = 0; + uint16_t *p; + int i; + + for (i = 0, p = ip6->src.s6_addr16; i < 16; ++i) + sum += *p++; + sum += htonl(data_len) >> 16; + sum += htonl(data_len) & 0xffff; + sum += htons(proto); + + while (sum > 0xffff) + sum = (sum & 0xffff) + (sum >> 16); + + return ~sum; +} + +static uint16_t convert_cksum(struct ip6 *ip6, struct ip4 *ip4) +{ + uint32_t sum = 0; + uint16_t *p; + int i; + + sum += ~ip4->src.s_addr >> 16; + sum += ~ip4->src.s_addr & 0xffff; + sum += ~ip4->dest.s_addr >> 16; + sum += ~ip4->dest.s_addr & 0xffff; + + for (i = 0, p = ip6->src.s6_addr16; i < 16; ++i) + sum += *p++; + + while (sum > 0xffff) + sum = (sum & 0xffff) + (sum >> 16); + + return sum; +} + +static void host_send_icmp4(uint8_t tos, struct in_addr *src, + struct in_addr *dest, struct icmp *icmp, + uint8_t *data, int data_len) +{ + struct { + struct tun_pi pi; + struct ip4 ip4; + struct icmp icmp; + } __attribute__ ((__packed__)) header; + struct iovec iov[2]; + + header.pi.flags = 0; + header.pi.proto = htons(ETH_P_IP); + header.ip4.ver_ihl = 0x45; + header.ip4.tos = tos; + header.ip4.length = htons(sizeof(header.ip4) + sizeof(header.icmp) + + data_len); + header.ip4.ident = 0; + header.ip4.flags_offset = 0; + header.ip4.ttl = 64; + header.ip4.proto = 1; + header.ip4.cksum = 0; + header.ip4.src = *src; + header.ip4.dest = *dest; + header.ip4.cksum = ip_checksum(&header.ip4, sizeof(header.ip4)); + header.icmp = *icmp; + header.icmp.cksum = 0; + header.icmp.cksum = ones_add(ip_checksum(data, data_len), + ip_checksum(&header.icmp, sizeof(header.icmp))); + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + iov[1].iov_base = data; + iov[1].iov_len = data_len; + if (writev(gcfg->tun_fd, iov, data_len ? 2 : 1) < 0) + slog(LOG_WARNING, "error writing packet to tun device: %s\n", + strerror(errno)); +} + +static void host_send_icmp4_error(uint8_t type, uint8_t code, uint32_t word, + struct pkt *orig) +{ + struct icmp icmp; + int orig_len; + + /* Don't send ICMP errors in response to ICMP messages other than + echo request */ + if (orig->data_proto == 1 && orig->icmp->type != 8) + return; + + orig_len = orig->header_len + orig->data_len; + if (orig_len > 576 - sizeof(struct ip4) - sizeof(struct icmp)) + orig_len = 576 - sizeof(struct ip4) - sizeof(struct icmp); + icmp.type = type; + icmp.code = code; + icmp.word = htonl(word); + host_send_icmp4(0, &gcfg->local_addr4, &orig->ip4->src, &icmp, + (uint8_t *)orig->ip4, orig_len); +} + +static void host_handle_icmp4(struct pkt *p) +{ + p->data += sizeof(struct icmp); + p->data_len -= sizeof(struct icmp); + + switch (p->icmp->type) { + case 8: + p->icmp->type = 0; + host_send_icmp4(p->ip4->tos, &p->ip4->dest, &p->ip4->src, + p->icmp, p->data, p->data_len); + break; + } +} + +static void xlate_header_4to6(struct pkt *p, struct ip6 *ip6, + int payload_length) +{ + ip6->ver_tc_fl = htonl((0x6 << 28) | (p->ip4->tos << 20)); + ip6->payload_length = htons(payload_length); + ip6->next_header = p->data_proto == 1 ? 58 : p->data_proto; + ip6->hop_limit = p->ip4->ttl; +} + +static int xlate_payload_4to6(struct pkt *p, struct ip6 *ip6) +{ + uint16_t *tck; + uint16_t cksum; + + if (p->ip4->flags_offset & htons(IP4_F_MASK)) + return 0; + + switch (p->data_proto) { + case 1: + cksum = ip6_checksum(ip6, htons(p->ip4->length) - + p->header_len, 58); + cksum = ones_add(p->icmp->cksum, cksum); + if (p->icmp->type == 8) { + p->icmp->type = 128; + p->icmp->cksum = ones_add(cksum, ~(128 - 8)); + } else { + p->icmp->type = 129; + p->icmp->cksum = ones_add(cksum, ~(129 - 0)); + } + return 0; + case 17: + if (p->data_len < 8) + return -1; + tck = (uint16_t *)(p->data + 6); + if (!*tck) + return -1; /* drop UDP packets with no checksum */ + break; + case 6: + if (p->data_len < 20) + return -1; + tck = (uint16_t *)(p->data + 16); + break; + default: + return 0; + } + *tck = ones_add(*tck, ~convert_cksum(ip6, p->ip4)); + return 0; +} + +static void xlate_4to6_data(struct pkt *p) +{ + struct { + struct tun_pi pi; + struct ip6 ip6; + struct ip6_frag ip6_frag; + } __attribute__ ((__packed__)) header; + struct cache_entry *src = NULL, *dest = NULL; + struct iovec iov[2]; + int no_frag_hdr = 0; + uint16_t off = ntohs(p->ip4->flags_offset); + int frag_size; + + frag_size = gcfg->ipv6_offlink_mtu; + if (frag_size > gcfg->mtu) + frag_size = gcfg->mtu; + frag_size -= sizeof(struct ip6); + + if (map_ip4_to_ip6(&header.ip6.dest, &p->ip4->dest, &dest)) { + host_send_icmp4_error(3, 1, 0, p); + return; + } + + if (map_ip4_to_ip6(&header.ip6.src, &p->ip4->src, &src)) { + host_send_icmp4_error(3, 10, 0, p); + return; + } + + /* We do not respect the DF flag for IP4 packets that are already + fragmented, because the IP6 fragmentation header takes an extra + eight bytes, which we don't have space for because the IP4 source + thinks the MTU is only 20 bytes smaller than the actual MTU on + the IP6 side. (E.g. if the IP6 MTU is 1496, the IP4 source thinks + the path MTU is 1476, which means it sends fragments with 1456 + bytes of fragmented payload. Translating this to IP6 requires + 40 bytes of IP6 header + 8 bytes of fragmentation header + + 1456 bytes of payload == 1504 bytes.) */ + if ((off & (IP4_F_MASK | IP4_F_MF)) == 0) { + if (off & IP4_F_DF) { + if (gcfg->mtu - MTU_ADJ < p->header_len + p->data_len) { + host_send_icmp4_error(3, 4, + gcfg->mtu - MTU_ADJ, p); + return; + } + no_frag_hdr = 1; + } else if (gcfg->lazy_frag_hdr && p->data_len <= frag_size) { + no_frag_hdr = 1; + } + } + + xlate_header_4to6(p, &header.ip6, p->data_len); + --header.ip6.hop_limit; + + if (xlate_payload_4to6(p, &header.ip6) < 0) + return; + + if (src) + src->flags |= CACHE_F_SEEN_4TO6; + if (dest) + dest->flags |= CACHE_F_SEEN_4TO6; + + header.pi.flags = 0; + header.pi.proto = htons(ETH_P_IPV6); + + if (no_frag_hdr) { + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(struct tun_pi) + sizeof(struct ip6); + iov[1].iov_base = p->data; + iov[1].iov_len = p->data_len; + + if (writev(gcfg->tun_fd, iov, 2) < 0) + slog(LOG_WARNING, "error writing packet to tun " + "device: %s\n", strerror(errno)); + } else { + header.ip6_frag.next_header = header.ip6.next_header; + header.ip6_frag.reserved = 0; + header.ip6_frag.ident = htonl(ntohs(p->ip4->ident)); + + header.ip6.next_header = 44; + + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + + off = (off & IP4_F_MASK) * 8; + frag_size = (frag_size - sizeof(header.ip6_frag)) & ~7; + + while (p->data_len > 0) { + if (p->data_len < frag_size) + frag_size = p->data_len; + + header.ip6.payload_length = + htons(sizeof(struct ip6_frag) + frag_size); + header.ip6_frag.offset_flags = htons(off); + + iov[1].iov_base = p->data; + iov[1].iov_len = frag_size; + + p->data += frag_size; + p->data_len -= frag_size; + off += frag_size; + + if (p->data_len || (p->ip4->flags_offset & + htons(IP4_F_MF))) + header.ip6_frag.offset_flags |= htons(IP6_F_MF); + + if (writev(gcfg->tun_fd, iov, 2) < 0) { + slog(LOG_WARNING, "error writing packet to " + "tun device: %s\n", + strerror(errno)); + return; + } + } + } +} + +static int parse_ip4(struct pkt *p) +{ + p->ip4 = (struct ip4 *)(p->data); + + if (p->data_len < sizeof(struct ip4)) + return -1; + + p->header_len = (p->ip4->ver_ihl & 0x0f) * 4; + + if ((p->ip4->ver_ihl >> 4) != 4 || p->header_len < sizeof(struct ip4) || + p->data_len < p->header_len || + ntohs(p->ip4->length) < p->header_len || + validate_ip4_addr(&p->ip4->src) || + validate_ip4_addr(&p->ip4->dest)) + return -1; + + if (p->data_len > ntohs(p->ip4->length)) + p->data_len = ntohs(p->ip4->length); + + p->data += p->header_len; + p->data_len -= p->header_len; + p->data_proto = p->ip4->proto; + + if (p->data_proto == 1) { + if (p->ip4->flags_offset & htons(IP4_F_MASK | IP4_F_MF)) + return -1; /* fragmented ICMP is unsupported */ + if (p->data_len < sizeof(struct icmp)) + return -1; + p->icmp = (struct icmp *)(p->data); + } else { + if ((p->ip4->flags_offset & htons(IP4_F_MF)) && + (p->data_len & 0x7)) + return -1; + + if ((uint32_t)((ntohs(p->ip4->flags_offset) & IP4_F_MASK) * 8) + + p->data_len > 65535) + return -1; + } + + return 0; +} + +/* Estimates the most likely MTU of the link that the datagram in question was + * too large to fit through, using the algorithm from RFC 1191. */ +static unsigned int est_mtu(unsigned int too_big) +{ + static const unsigned int table[] = { + 65535, 32000, 17914, 8166, 4352, 2002, 1492, 1006, 508, 296, 0 + }; + int i; + + for (i = 0; table[i]; ++i) + if (too_big > table[i]) + return table[i]; + return 68; +} + +static void xlate_4to6_icmp_error(struct pkt *p) +{ + struct { + struct tun_pi pi; + struct ip6 ip6; + struct icmp icmp; + struct ip6 ip6_em; + } __attribute__ ((__packed__)) header; + struct iovec iov[2]; + struct pkt p_em; + uint32_t mtu; + uint16_t em_len; + int allow_fake_source = 0; + struct cache_entry *orig_dest = NULL; + + memset(&p_em, 0, sizeof(p_em)); + p_em.data = p->data + sizeof(struct icmp); + p_em.data_len = p->data_len - sizeof(struct icmp); + + if (p->icmp->type == 3 || p->icmp->type == 11 || p->icmp->type == 12) { + em_len = (ntohl(p->icmp->word) >> 14) & 0x3fc; + if (em_len) { + if (p_em.data_len < em_len) + return; + p_em.data_len = em_len; + } + } + + if (parse_ip4(&p_em) < 0) + return; + + if (p_em.data_proto == 1 && p_em.icmp->type != 8) + return; + + if (sizeof(struct ip6) * 2 + sizeof(struct icmp) + p_em.data_len > 1280) + p_em.data_len = 1280 - sizeof(struct ip6) * 2 - + sizeof(struct icmp); + + if (map_ip4_to_ip6(&header.ip6_em.src, &p_em.ip4->src, NULL) || + map_ip4_to_ip6(&header.ip6_em.dest, + &p_em.ip4->dest, &orig_dest)) + return; + + xlate_header_4to6(&p_em, &header.ip6_em, + ntohs(p_em.ip4->length) - p_em.header_len); + + switch (p->icmp->type) { + case 3: /* Destination Unreachable */ + header.icmp.type = 1; /* Destination Unreachable */ + header.icmp.word = 0; + switch (p->icmp->code) { + case 0: /* Network Unreachable */ + case 1: /* Host Unreachable */ + case 5: /* Source Route Failed */ + case 6: + case 7: + case 8: + case 11: + case 12: + header.icmp.code = 0; /* No route to destination */ + allow_fake_source = 1; + break; + case 2: /* Protocol Unreachable */ + header.icmp.type = 4; + header.icmp.code = 1; + header.icmp.word = htonl(6); + break; + case 3: /* Port Unreachable */ + header.icmp.code = 4; /* Port Unreachable */ + break; + case 4: /* Fragmentation needed and DF set */ + header.icmp.type = 2; + header.icmp.code = 0; + mtu = ntohl(p->icmp->word) & 0xffff; + if (mtu < 68) + mtu = est_mtu(ntohs(p_em.ip4->length)); + mtu += MTU_ADJ; + if (mtu > gcfg->mtu) + mtu = gcfg->mtu; + if (mtu < 1280 && gcfg->allow_ident_gen && orig_dest) { + orig_dest->flags |= CACHE_F_GEN_IDENT; + mtu = 1280; + } + header.icmp.word = htonl(mtu); + allow_fake_source = 1; + break; + case 9: + case 10: + case 13: + case 15: + header.icmp.code = 1; /* Administratively prohibited */ + break; + default: + return; + } + break; + case 11: /* Time Exceeded */ + header.icmp.type = 3; /* Time Exceeded */ + header.icmp.code = p->icmp->code; + header.icmp.word = 0; + break; + case 12: /* Parameter Problem */ + if (p->icmp->code != 0 && p->icmp->code != 2) + return; + header.icmp.type = 4; + header.icmp.code = 0; + /* XXX do this and remove return */ + return; + default: + return; + } + + if (xlate_payload_4to6(&p_em, &header.ip6_em) < 0) + return; + + if (map_ip4_to_ip6(&header.ip6.src, &p->ip4->src, NULL)) { + if (allow_fake_source) + header.ip6.src = gcfg->local_addr6; + else + return; + } + + if (map_ip4_to_ip6(&header.ip6.dest, &p->ip4->dest, NULL)) + return; + + xlate_header_4to6(p, &header.ip6, + sizeof(header.icmp) + sizeof(header.ip6_em) + p_em.data_len); + --header.ip6.hop_limit; + + header.icmp.cksum = 0; + header.icmp.cksum = ones_add(ip6_checksum(&header.ip6, + ntohs(header.ip6.payload_length), 58), + ones_add(ip_checksum(&header.icmp, + sizeof(header.icmp) + + sizeof(header.ip6_em)), + ip_checksum(p_em.data, p_em.data_len))); + + header.pi.flags = 0; + header.pi.proto = htons(ETH_P_IPV6); + + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + iov[1].iov_base = p_em.data; + iov[1].iov_len = p_em.data_len; + + if (writev(gcfg->tun_fd, iov, 2) < 0) + slog(LOG_WARNING, "error writing packet to tun device: %s\n", + strerror(errno)); +} + +void handle_ip4(struct pkt *p) +{ + if (parse_ip4(p) < 0 || p->ip4->ttl == 0 || + ip_checksum(p->ip4, p->header_len) || + p->header_len + p->data_len != ntohs(p->ip4->length)) + return; + + if (p->icmp && ip_checksum(p->data, p->data_len)) + return; + + if (p->ip4->dest.s_addr == gcfg->local_addr4.s_addr) { + if (p->data_proto == 1) + host_handle_icmp4(p); + else + host_send_icmp4_error(3, 2, 0, p); + } else { + if (p->ip4->ttl == 1) { + host_send_icmp4_error(11, 0, 0, p); + return; + } + if (p->data_proto != 1 || p->icmp->type == 8 || + p->icmp->type == 0) + xlate_4to6_data(p); + else + xlate_4to6_icmp_error(p); + } +} + +static void host_send_icmp6(uint8_t tc, struct in6_addr *src, + struct in6_addr *dest, struct icmp *icmp, + uint8_t *data, int data_len) +{ + struct { + struct tun_pi pi; + struct ip6 ip6; + struct icmp icmp; + } __attribute__ ((__packed__)) header; + struct iovec iov[2]; + + header.pi.flags = 0; + header.pi.proto = htons(ETH_P_IPV6); + header.ip6.ver_tc_fl = htonl((0x6 << 28) | (tc << 20)); + header.ip6.payload_length = htons(sizeof(header.icmp) + data_len); + header.ip6.next_header = 58; + header.ip6.hop_limit = 64; + header.ip6.src = *src; + header.ip6.dest = *dest; + header.icmp = *icmp; + header.icmp.cksum = 0; + header.icmp.cksum = ones_add(ip_checksum(data, data_len), + ip_checksum(&header.icmp, sizeof(header.icmp))); + header.icmp.cksum = ones_add(header.icmp.cksum, + ip6_checksum(&header.ip6, + data_len + sizeof(header.icmp), 58)); + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + iov[1].iov_base = data; + iov[1].iov_len = data_len; + if (writev(gcfg->tun_fd, iov, data_len ? 2 : 1) < 0) + slog(LOG_WARNING, "error writing packet to tun device: %s\n", + strerror(errno)); +} + +static void host_send_icmp6_error(uint8_t type, uint8_t code, uint32_t word, + struct pkt *orig) +{ + struct icmp icmp; + int orig_len; + + /* Don't send ICMP errors in response to ICMP messages other than + echo request */ + if (orig->data_proto == 58 && orig->icmp->type != 128) + return; + + orig_len = sizeof(struct ip6) + orig->header_len + orig->data_len; + if (orig_len > 1280 - sizeof(struct ip6) - sizeof(struct icmp)) + orig_len = 1280 - sizeof(struct ip6) - sizeof(struct icmp); + icmp.type = type; + icmp.code = code; + icmp.word = htonl(word); + host_send_icmp6(0, &gcfg->local_addr6, &orig->ip6->src, &icmp, + (uint8_t *)orig->ip6, orig_len); +} + +static void host_handle_icmp6(struct pkt *p) +{ + p->data += sizeof(struct icmp); + p->data_len -= sizeof(struct icmp); + + switch (p->icmp->type) { + case 128: + p->icmp->type = 129; + host_send_icmp6((ntohl(p->ip6->ver_tc_fl) >> 20) & 0xff, + &p->ip6->dest, &p->ip6->src, + p->icmp, p->data, p->data_len); + break; + } +} + +static void xlate_header_6to4(struct pkt *p, struct ip4 *ip4, + int payload_length, struct cache_entry *dest) +{ + ip4->ver_ihl = 0x45; + ip4->tos = (ntohl(p->ip6->ver_tc_fl) >> 20) & 0xff; + ip4->length = htons(sizeof(struct ip4) + payload_length); + if (p->ip6_frag) { + ip4->ident = htons(ntohl(p->ip6_frag->ident) & 0xffff); + ip4->flags_offset = + htons(ntohs(p->ip6_frag->offset_flags) >> 3); + if (p->ip6_frag->offset_flags & htons(IP6_F_MF)) + ip4->flags_offset |= htons(IP4_F_MF); + } else if (dest && (dest->flags & CACHE_F_GEN_IDENT) && + p->header_len + payload_length <= 1280) { + ip4->ident = htons(dest->ip4_ident++); + ip4->flags_offset = 0; + if (dest->ip4_ident == 0) + dest->ip4_ident++; + } else { + ip4->ident = 0; + ip4->flags_offset = htons(IP4_F_DF); + } + ip4->ttl = p->ip6->hop_limit; + ip4->proto = p->data_proto == 58 ? 1 : p->data_proto; + ip4->cksum = 0; +} + +static int xlate_payload_6to4(struct pkt *p, struct ip4 *ip4) +{ + uint16_t *tck; + uint16_t cksum; + + if (p->ip6_frag && (p->ip6_frag->offset_flags & ntohs(IP6_F_MASK))) + return 0; + + switch (p->data_proto) { + case 58: + cksum = ~ip6_checksum(p->ip6, htons(p->ip6->payload_length) - + p->header_len, 58); + cksum = ones_add(p->icmp->cksum, cksum); + if (p->icmp->type == 128) { + p->icmp->type = 8; + p->icmp->cksum = ones_add(cksum, 128 - 8); + } else { + p->icmp->type = 0; + p->icmp->cksum = ones_add(cksum, 129 - 0); + } + return 0; + case 17: + if (p->data_len < 8) + return -1; + tck = (uint16_t *)(p->data + 6); + if (!*tck) + return -1; /* drop UDP packets with no checksum */ + break; + case 6: + if (p->data_len < 20) + return -1; + tck = (uint16_t *)(p->data + 16); + break; + default: + return 0; + } + *tck = ones_add(*tck, convert_cksum(p->ip6, ip4)); + return 0; +} + +static void xlate_6to4_data(struct pkt *p) +{ + struct { + struct tun_pi pi; + struct ip4 ip4; + } __attribute__ ((__packed__)) header; + struct cache_entry *src = NULL, *dest = NULL; + struct iovec iov[2]; + + if (map_ip6_to_ip4(&header.ip4.dest, &p->ip6->dest, &dest, 0)) { + host_send_icmp6_error(1, 0, 0, p); + return; + } + + if (map_ip6_to_ip4(&header.ip4.src, &p->ip6->src, &src, 1)) { + host_send_icmp6_error(1, 5, 0, p); + return; + } + + if (sizeof(struct ip6) + p->header_len + p->data_len > gcfg->mtu) { + host_send_icmp6_error(2, 0, gcfg->mtu, p); + return; + } + + xlate_header_6to4(p, &header.ip4, p->data_len, dest); + --header.ip4.ttl; + + if (xlate_payload_6to4(p, &header.ip4) < 0) + return; + + if (src) + src->flags |= CACHE_F_SEEN_6TO4; + if (dest) + dest->flags |= CACHE_F_SEEN_6TO4; + + header.pi.flags = 0; + header.pi.proto = htons(ETH_P_IP); + + header.ip4.cksum = ip_checksum(&header.ip4, sizeof(header.ip4)); + + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + iov[1].iov_base = p->data; + iov[1].iov_len = p->data_len; + + if (writev(gcfg->tun_fd, iov, 2) < 0) + slog(LOG_WARNING, "error writing packet to tun device: %s\n", + strerror(errno)); +} + +static int parse_ip6(struct pkt *p) +{ + int hdr_len; + + p->ip6 = (struct ip6 *)(p->data); + + if (p->data_len < sizeof(struct ip6) || + (ntohl(p->ip6->ver_tc_fl) >> 28) != 6 || + validate_ip6_addr(&p->ip6->src) || + validate_ip6_addr(&p->ip6->dest)) + return -1; + + p->data_proto = p->ip6->next_header; + p->data += sizeof(struct ip6); + p->data_len -= sizeof(struct ip6); + + if (p->data_len > ntohs(p->ip6->payload_length)) + p->data_len = ntohs(p->ip6->payload_length); + + while (p->data_proto == 0 || p->data_proto == 43 || + p->data_proto == 60) { + if (p->data_len < 2) + return -1; + hdr_len = (p->data[1] + 1) * 8; + if (p->data_len < hdr_len) + return -1; + p->data_proto = p->data[0]; + p->data += hdr_len; + p->data_len -= hdr_len; + p->header_len += hdr_len; + } + + if (p->data_proto == 44) { + if (p->ip6_frag || p->data_len < sizeof(struct ip6_frag)) + return -1; + p->ip6_frag = (struct ip6_frag *)p->data; + p->data_proto = p->ip6_frag->next_header; + p->data += sizeof(struct ip6_frag); + p->data_len -= sizeof(struct ip6_frag); + p->header_len += sizeof(struct ip6_frag); + + if ((p->ip6_frag->offset_flags & htons(IP6_F_MF)) && + (p->data_len & 0x7)) + return -1; + + if ((uint32_t)(ntohs(p->ip6_frag->offset_flags) & IP6_F_MASK) + + p->data_len > 65535) + return -1; + } + + if (p->data_proto == 58) { + if (p->ip6_frag && (p->ip6_frag->offset_flags & + htons(IP6_F_MASK | IP6_F_MF))) + return -1; /* fragmented ICMP is unsupported */ + if (p->data_len < sizeof(struct icmp)) + return -1; + p->icmp = (struct icmp *)(p->data); + } + + return 0; +} + +static void xlate_6to4_icmp_error(struct pkt *p) +{ + struct { + struct tun_pi pi; + struct ip4 ip4; + struct icmp icmp; + struct ip4 ip4_em; + } __attribute__ ((__packed__)) header; + struct iovec iov[2]; + struct pkt p_em; + uint32_t mtu; + uint16_t em_len; + int allow_fake_source = 0; + + memset(&p_em, 0, sizeof(p_em)); + p_em.data = p->data + sizeof(struct icmp); + p_em.data_len = p->data_len - sizeof(struct icmp); + + if (p->icmp->type == 1 || p->icmp->type == 3) { + em_len = (ntohl(p->icmp->word) >> 21) & 0x7f8; + if (em_len) { + if (p_em.data_len < em_len) + return; + p_em.data_len = em_len; + } + } + + if (parse_ip6(&p_em) < 0) + return; + + if (p_em.data_proto == 58 && p_em.icmp->type != 128) + return; + + if (sizeof(struct ip4) * 2 + sizeof(struct icmp) + p_em.data_len > 576) + p_em.data_len = 576 - sizeof(struct ip4) * 2 - + sizeof(struct icmp); + + switch (p->icmp->type) { + case 1: /* Destination Unreachable */ + header.icmp.type = 3; /* Destination Unreachable */ + header.icmp.word = 0; + switch (p->icmp->code) { + case 0: /* No route to destination */ + case 2: /* Beyond scope of source address */ + header.icmp.code = 1; /* Host Unreachable */ + allow_fake_source = 1; + break; + case 1: /* Administratively prohibited */ + header.icmp.code = 10; /* Administratively prohibited */ + break; + case 4: /* Port Unreachable */ + header.icmp.code = 3; /* Port Unreachable */ + break; + default: + return; + } + break; + case 2: /* Packet Too Big */ + header.icmp.type = 3; /* Destination Unreachable */ + header.icmp.code = 4; /* Fragmentation needed */ + mtu = ntohl(p->icmp->word); + if (mtu < 68) { + slog(LOG_INFO, "no mtu in Packet Too Big message\n"); + return; + } + if (mtu > gcfg->mtu) + mtu = gcfg->mtu; + mtu -= MTU_ADJ; + header.icmp.word = htonl(mtu); + allow_fake_source = 1; + break; + case 3: /* Time Exceeded */ + header.icmp.type = 11; /* Time Exceeded */ + header.icmp.code = p->icmp->code; + header.icmp.word = 0; + break; + case 4: /* Parameter Problem */ + if (p->icmp->code == 1) { + header.icmp.type = 3; /* Destination Unreachable */ + header.icmp.code = 2; /* Protocol Unreachable */ + header.icmp.word = 0; + break; + } else if (p->icmp->code != 0) { + return; + } + header.icmp.type = 12; /* Parameter Problem */ + header.icmp.code = 0; + /* XXX do this and remove return */ + return; + default: + return; + } + + if (map_ip6_to_ip4(&header.ip4_em.src, &p_em.ip6->src, NULL, 0) || + map_ip6_to_ip4(&header.ip4_em.dest, + &p_em.ip6->dest, NULL, 0) || + xlate_payload_6to4(&p_em, &header.ip4_em) < 0) + return; + + xlate_header_6to4(&p_em, &header.ip4_em, + ntohs(p_em.ip6->payload_length) - p_em.header_len, NULL); + + header.ip4_em.cksum = + ip_checksum(&header.ip4_em, sizeof(header.ip4_em)); + + if (map_ip6_to_ip4(&header.ip4.src, &p->ip6->src, NULL, 0)) { + if (allow_fake_source) + header.ip4.src = gcfg->local_addr4; + else + return; + } + + if (map_ip6_to_ip4(&header.ip4.dest, &p->ip6->dest, NULL, 0)) + return; + + xlate_header_6to4(p, &header.ip4, sizeof(header.icmp) + + sizeof(header.ip4_em) + p_em.data_len, NULL); + --header.ip4.ttl; + + header.ip4.cksum = ip_checksum(&header.ip4, sizeof(header.ip4)); + + header.icmp.cksum = 0; + header.icmp.cksum = ones_add(ip_checksum(&header.icmp, + sizeof(header.icmp) + + sizeof(header.ip4_em)), + ip_checksum(p_em.data, p_em.data_len)); + + header.pi.flags = 0; + header.pi.proto = htons(ETH_P_IP); + + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + iov[1].iov_base = p_em.data; + iov[1].iov_len = p_em.data_len; + + if (writev(gcfg->tun_fd, iov, 2) < 0) + slog(LOG_WARNING, "error writing packet to tun device: %s\n", + strerror(errno)); +} + +void handle_ip6(struct pkt *p) +{ + if (parse_ip6(p) < 0 || p->ip6->hop_limit == 0 || + p->header_len + p->data_len != + ntohs(p->ip6->payload_length)) + return; + + if (p->icmp && ones_add(ip_checksum(p->data, p->data_len), + ip6_checksum(p->ip6, p->data_len, 58))) + return; + + if (IN6_ARE_ADDR_EQUAL(&p->ip6->dest, &gcfg->local_addr6)) { + if (p->data_proto == 58) + host_handle_icmp6(p); + else + host_send_icmp6_error(4, 1, 6, p); + } else { + if (p->ip6->hop_limit == 1) { + host_send_icmp6_error(3, 0, 0, p); + return; + } + + if (p->data_proto != 58 || p->icmp->type == 128 || + p->icmp->type == 129) + xlate_6to4_data(p); + else + xlate_6to4_icmp_error(p); + } +} diff --git a/tayga.8 b/tayga.8 new file mode 100644 index 0000000..d13d9ac --- /dev/null +++ b/tayga.8 @@ -0,0 +1,102 @@ +.TH TAYGA "8" "June 2011" "TAYGA 0.9.2" "" + +.SH NAME +tayga \- stateless NAT64 daemon + +.SH SYNOPSIS +.B tayga +.I [OPTION]... +.PP +.B "tayga \-\-mktun" +.I [OPTION]... +.PP +.B "tayga \-\-rmtun" +.I [OPTION]... + +.SH DESCRIPTION +TAYGA is a stateless NAT64 daemon for Linux. Using the in-kernel TUN network +driver, TAYGA receives IPv4 and IPv6 packets from the host's network stack, +translates them to the other protocol, and then sends the translated packets +back to the host using the same TUN interface. +.P +Translation is compliant with IETF Internet-Draft +draft-ietf-behave-v6v4-xlate-23, and address mapping is performed in +accordance with RFC 6052. Optionally, TAYGA may be configured to dynamically +map IPv6 hosts to addresses drawn from a configured IPv4 address pool. +.P +As a stateless NAT, TAYGA requires a one-to-one mapping between IPv4 addresses +and IPv6 addresses. Mapping multiple IPv6 addresses onto a single IPv4 +address can be achieved by mapping IPv6 addresses to private IPv4 addresses +with TAYGA and then using a stateful NAT44 (such as the iptables(8) MASQUERADE +target) to map the private IPv4 addresses onto the desired single IPv4 address. +.P +TAYGA's configuration is stored in the tayga.conf(5) file, which is usually +found in /etc/tayga.conf or /usr/local/etc/tayga.conf. + +.SH INVOCATION +Without the +.B \-\-mktun +or +.B \-\-rmtun +options, the `tayga` executable runs as a daemon, translating packets as +described above. +.P +The +.B \-\-mktun +and +.B \-\-rmtun +options instruct TAYGA to create or destroy, respectively, its configured TUN +device as a "persistent" interface and then immediately exit. +.P +Persistent TUN devices remain present on the host system even when TAYGA is +not running. This allows host-side network parameters and firewall rules to +be configured prior to commencement of packet translation. This may simplify +network configuration on the host; for example, systems which use a +Debian-style /etc/network/interfaces file may configure TAYGA's TUN device at +boot by running `tayga --mktun` as a "pre-up" command and then configuring the +TUN device as any other network interface. + +.SH OPTIONS +.TP +.BI "\-c " configfile " | \-\-config " configfile +Read configuration options from +.I configfile +.TP +.B \-d +Enable debug messages (enables +.B \-\-nodetach +as well) +.TP +.B "\-n | \-\-nodetach" +Do not detach from terminal +.TP +.BI "\-u " userid " | \-\-user " userid +Set uid to +.I userid +after initialization +.TP +.BI "\-g " groupid " | \-\-group " groupid +Set gid to +.I groupid +after initialization +.TP +.B "\-r | \-\-chroot" +chroot() to data\-dir (specified in config file) +.TP +.BI "\-p " pidfile " | \-\-pidfile " pidfile +Write process ID of daemon to +.I pidfile +.SH AUTHOR +Written by Nathan Lutchansky +.SH COPYRIGHT +Copyright \(co 2010 Nathan Lutchansky +.br +License GPLv2+: GNU GPL version 2 or later +.br +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. +.SH "SEE ALSO" + +.BR tayga.conf (5) +.br +.BR diff --git a/tayga.c b/tayga.c new file mode 100644 index 0000000..fbd2e64 --- /dev/null +++ b/tayga.c @@ -0,0 +1,568 @@ +/* + * tayga.c -- main server code + * + * part of TAYGA + * Copyright (C) 2010 Nathan Lutchansky + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include + +#include +#include +#include +#include +#include + +#define USAGE_TEXT \ +"Usage: %s [-c|--config CONFIGFILE] [-d] [-n|--nodetach] [-u|--user USERID]\n" \ +" [-g|--group GROUPID] [-r|--chroot] [-p|--pidfile PIDFILE]\n\n" \ +"--config FILE : Read configuration options from FILE\n" \ +"-d : Enable debug messages (implies --nodetach)\n" \ +"--nodetach : Do not detach from terminal\n" \ +"--user USERID : Set uid to USERID after initialization\n" \ +"--group GROUPID : Set gid to GROUPID after initialization\n" \ +"--chroot : chroot() to data-dir (specified in config file)\n\n" \ +"--pidfile FILE : Write process ID of daemon to FILE\n" + +extern struct config *gcfg; +time_t now; + +static int signalfds[2]; +static int use_stdout; + +void slog(int priority, const char *format, ...) +{ + va_list ap; + + va_start(ap, format); + if (use_stdout) + vprintf(format, ap); + else if (priority != LOG_DEBUG) + vsyslog(priority, format, ap); + va_end(ap); +} + +static void set_nonblock(int fd) +{ + int flags; + + flags = fcntl(fd, F_GETFL); + if (flags < 0) { + slog(LOG_CRIT, "fcntl F_GETFL returned %s\n", strerror(errno)); + exit(1); + } + flags |= O_NONBLOCK; + if (fcntl(fd, F_SETFL, flags) < 0) { + slog(LOG_CRIT, "fcntl F_SETFL returned %s\n", strerror(errno)); + exit(1); + } +} + +void read_random_bytes(void *d, int len) +{ + int ret; + + ret = read(gcfg->urandom_fd, d, len); + if (ret < 0) { + slog(LOG_CRIT, "read /dev/urandom returned %s\n", + strerror(errno)); + exit(1); + } + if (ret < len) { + slog(LOG_CRIT, "read /dev/urandom returned EOF\n"); + exit(1); + } +} + +static void tun_setup(int do_mktun, int do_rmtun) +{ + struct ifreq ifr; + int fd; + + gcfg->tun_fd = open("/dev/net/tun", O_RDWR); + if (gcfg->tun_fd < 0) { + slog(LOG_CRIT, "Unable to open /dev/net/tun, aborting: %s\n", + strerror(errno)); + exit(1); + } + + memset(&ifr, 0, sizeof(ifr)); + ifr.ifr_flags = IFF_TUN; + strcpy(ifr.ifr_name, gcfg->tundev); + if (ioctl(gcfg->tun_fd, TUNSETIFF, &ifr) < 0) { + slog(LOG_CRIT, "Unable to attach tun device %s, aborting: " + "%s\n", gcfg->tundev, strerror(errno)); + exit(1); + } + + if (do_mktun) { + if (ioctl(gcfg->tun_fd, TUNSETPERSIST, 1) < 0) { + slog(LOG_CRIT, "Unable to set persist flag on %s, " + "aborting: %s\n", gcfg->tundev, + strerror(errno)); + exit(1); + } + if (ioctl(gcfg->tun_fd, TUNSETOWNER, 0) < 0) { + slog(LOG_CRIT, "Unable to set owner on %s, " + "aborting: %s\n", gcfg->tundev, + strerror(errno)); + exit(1); + } + if (ioctl(gcfg->tun_fd, TUNSETGROUP, 0) < 0) { + slog(LOG_CRIT, "Unable to set group on %s, " + "aborting: %s\n", gcfg->tundev, + strerror(errno)); + exit(1); + } + slog(LOG_NOTICE, "Created persistent tun device %s\n", + gcfg->tundev); + return; + } else if (do_rmtun) { + if (ioctl(gcfg->tun_fd, TUNSETPERSIST, 0) < 0) { + slog(LOG_CRIT, "Unable to clear persist flag on %s, " + "aborting: %s\n", gcfg->tundev, + strerror(errno)); + exit(1); + } + slog(LOG_NOTICE, "Removed persistent tun device %s\n", + gcfg->tundev); + return; + } + + set_nonblock(gcfg->tun_fd); + + fd = socket(PF_INET, SOCK_DGRAM, 0); + if (fd < 0) { + slog(LOG_CRIT, "Unable to create socket, aborting: %s\n", + strerror(errno)); + exit(1); + } + memset(&ifr, 0, sizeof(ifr)); + strcpy(ifr.ifr_name, gcfg->tundev); + if (ioctl(fd, SIOCGIFMTU, &ifr) < 0) { + slog(LOG_CRIT, "Unable to query MTU, aborting: %s\n", + strerror(errno)); + exit(1); + } + close(fd); + + gcfg->mtu = ifr.ifr_mtu; + + slog(LOG_INFO, "Using tun device %s with MTU %d\n", gcfg->tundev, + gcfg->mtu); +} + +static void signal_handler(int signal) +{ + write(signalfds[1], &signal, sizeof(signal)); +} + +static void signal_setup(void) +{ + struct sigaction act; + + if (pipe(signalfds) < 0) { + slog(LOG_INFO, "unable to create signal pipe, aborting: %s\n", + strerror(errno)); + exit(1); + } + set_nonblock(signalfds[0]); + set_nonblock(signalfds[1]); + memset(&act, 0, sizeof(act)); + act.sa_handler = signal_handler; + sigaction(SIGINT, &act, NULL); + sigaction(SIGHUP, &act, NULL); + sigaction(SIGUSR1, &act, NULL); + sigaction(SIGUSR2, &act, NULL); + sigaction(SIGQUIT, &act, NULL); + sigaction(SIGTERM, &act, NULL); +} + +static void read_from_tun(void) +{ + int ret; + struct tun_pi *pi = (struct tun_pi *)gcfg->recv_buf; + struct pkt pbuf, *p = &pbuf; + + ret = read(gcfg->tun_fd, gcfg->recv_buf, gcfg->recv_buf_size); + if (ret < 0) { + if (errno == EAGAIN) + return; + slog(LOG_ERR, "received error when reading from tun " + "device: %s\n", strerror(errno)); + return; + } + if (ret < sizeof(struct tun_pi)) { + slog(LOG_WARNING, "short read from tun device " + "(%d bytes)\n", ret); + return; + } + if (ret == gcfg->recv_buf_size) { + slog(LOG_WARNING, "dropping oversized packet\n"); + return; + } + memset(p, 0, sizeof(struct pkt)); + p->data = gcfg->recv_buf + sizeof(struct tun_pi); + p->data_len = ret - sizeof(struct tun_pi); + switch (ntohs(pi->proto)) { + case ETH_P_IP: + handle_ip4(p); + break; + case ETH_P_IPV6: + handle_ip6(p); + break; + default: + slog(LOG_WARNING, "Dropping unknown proto %04x from " + "tun device\n", ntohs(pi->proto)); + break; + } +} + +static void read_from_signalfd(void) +{ + int ret, sig; + + for (;;) { + ret = read(signalfds[0], &sig, sizeof(sig)); + if (ret < 0) { + if (errno == EAGAIN) + return; + slog(LOG_CRIT, "got error %s from signalfd\n", + strerror(errno)); + exit(1); + } + if (ret == 0) { + slog(LOG_CRIT, "signal fd was closed\n"); + exit(1); + } + if (gcfg->dynamic_pool) + dynamic_maint(gcfg->dynamic_pool, 1); + slog(LOG_NOTICE, "exiting on signal %d\n", sig); + exit(0); + } +} + +int main(int argc, char **argv) +{ + int c, ret, longind; + int pidfd; + struct pollfd pollfds[2]; + struct map6 *m6; + char addrbuf[INET6_ADDRSTRLEN]; + + char *conffile = TAYGA_CONF_PATH; + char *user = NULL; + char *group = NULL; + char *pidfile = NULL; + int do_chroot = 0; + int detach = 1; + int do_mktun = 0; + int do_rmtun = 0; + struct passwd *pw = NULL; + struct group *gr = NULL; + + static struct option longopts[] = { + { "mktun", 0, 0, 0 }, + { "rmtun", 0, 0, 0 }, + { "help", 0, 0, 0 }, + { "config", 1, 0, 'c' }, + { "nodetach", 0, 0, 'n' }, + { "user", 1, 0, 'u' }, + { "group", 1, 0, 'g' }, + { "chroot", 0, 0, 'r' }, + { "pidfile", 1, 0, 'p' }, + { 0, 0, 0, 0 } + }; + + for (;;) { + c = getopt_long(argc, argv, "c:dnu:g:rp:", longopts, &longind); + if (c == -1) + break; + switch (c) { + case 0: + if (longind == 0) { + if (do_rmtun) { + fprintf(stderr, "Error: both --mktun " + "and --rmtun specified.\n"); + exit(1); + } + do_mktun = 1; + } else if (longind == 1) { + if (do_mktun) { + fprintf(stderr, "Error: both --mktun " + "and --rmtun specified.\n"); + exit(1); + } + do_rmtun = 1; + } else if (longind == 2) { + fprintf(stderr, USAGE_TEXT, argv[0]); + exit(0); + } + break; + case 'c': + conffile = optarg; + break; + case 'd': + use_stdout = 1; + detach = 0; + break; + case 'n': + detach = 0; + break; + case 'u': + user = optarg; + break; + case 'g': + group = optarg; + break; + case 'r': + do_chroot = 1; + break; + case 'p': + pidfile = optarg; + break; + default: + fprintf(stderr, "Try `%s --help' for more " + "information.\n", argv[0]); + exit(1); + } + } + + if (do_mktun || do_rmtun) { + use_stdout = 1; + if (user) { + fprintf(stderr, "Error: cannot specify -u or --user " + "with mktun/rmtun operation\n"); + exit(1); + } + if (group) { + fprintf(stderr, "Error: cannot specify -g or --group " + "with mktun/rmtun operation\n"); + exit(1); + } + if (do_chroot) { + fprintf(stderr, "Error: cannot specify -r or --chroot " + "with mktun/rmtun operation\n"); + exit(1); + } + read_config(conffile); + tun_setup(do_mktun, do_rmtun); + return 0; + } + + if (!use_stdout) + openlog("tayga", LOG_PID | LOG_NDELAY, LOG_DAEMON); + + if (user) { + pw = getpwnam(user); + if (!pw) { + slog(LOG_CRIT, "Error: user %s does not exist\n", user); + exit(1); + } + } + + if (group) { + gr = getgrnam(group); + if (!gr) { + slog(LOG_CRIT, "Error: group %s does not exist\n", + group); + exit(1); + } + } + + read_config(conffile); + + if (!gcfg->data_dir[0]) { + if (do_chroot) { + slog(LOG_CRIT, "Error: cannot chroot when no data-dir " + "is specified in %s\n", conffile); + exit(1); + } + chdir("/"); + } else if (chdir(gcfg->data_dir) < 0) { + if (user || errno != ENOENT) { + slog(LOG_CRIT, "Error: unable to chdir to %s, " + "aborting: %s\n", gcfg->data_dir, + strerror(errno)); + exit(1); + } + if (mkdir(gcfg->data_dir, 0777) < 0) { + slog(LOG_CRIT, "Error: unable to create %s, aborting: " + "%s\n", gcfg->data_dir, + strerror(errno)); + exit(1); + } + if (chdir(gcfg->data_dir) < 0) { + slog(LOG_CRIT, "Error: created %s but unable to chdir " + "to it!?? (%s)\n", gcfg->data_dir, + strerror(errno)); + exit(1); + } + } + + if (do_chroot && (!pw || pw->pw_uid == 0)) { + slog(LOG_CRIT, "Error: chroot is ineffective without also " + "specifying the -u option to switch to an " + "unprivileged user\n"); + exit(1); + } + + if (pidfile) { + pidfd = open(pidfile, O_WRONLY | O_CREAT | O_TRUNC, 0666); + if (pidfd < 0) { + slog(LOG_CRIT, "Error, unable to open %s for " + "writing: %s\n", pidfile, + strerror(errno)); + exit(1); + } + } + + if (detach && daemon(1, 0) < 0) { + slog(LOG_CRIT, "Error, unable to fork and detach: %s\n", + strerror(errno)); + exit(1); + } + + if (pidfile) { + snprintf(addrbuf, sizeof(addrbuf), "%ld\n", (long)getpid()); + write(pidfd, addrbuf, strlen(addrbuf)); + close(pidfd); + } + + slog(LOG_INFO, "starting TAYGA " VERSION "\n"); + + if (gcfg->cache_size) { + gcfg->urandom_fd = open("/dev/urandom", O_RDONLY); + if (gcfg->urandom_fd < 0) { + slog(LOG_CRIT, "Unable to open /dev/urandom, " + "aborting: %s\n", strerror(errno)); + exit(1); + } + read_random_bytes(gcfg->rand, 8 * sizeof(uint32_t)); + gcfg->rand[0] |= 1; /* need an odd number for IPv4 hash */ + } + + tun_setup(0, 0); + + if (do_chroot) { + if (chroot(gcfg->data_dir) < 0) { + slog(LOG_CRIT, "Unable to chroot to %s: %s\n", + gcfg->data_dir, strerror(errno)); + exit(1); + } + chdir("/"); + } + + if (gr) { + if (setregid(gr->gr_gid, gr->gr_gid) < 0 || + setregid(gr->gr_gid, gr->gr_gid) < 0 || + setgroups(1, &gr->gr_gid) < 0) { + slog(LOG_CRIT, "Error: cannot set gid to %d: %s\n", + gr->gr_gid, strerror(errno)); + exit(1); + } + } + + if (pw) { + if (setreuid(pw->pw_uid, pw->pw_uid) < 0 || + setreuid(pw->pw_uid, pw->pw_uid) < 0) { + slog(LOG_CRIT, "Error: cannot set uid to %d: %s\n", + pw->pw_uid, strerror(errno)); + exit(1); + } + } + + signal_setup(); + + inet_ntop(AF_INET, &gcfg->local_addr4, addrbuf, sizeof(addrbuf)); + slog(LOG_INFO, "TAYGA's IPv4 address: %s\n", addrbuf); + inet_ntop(AF_INET6, &gcfg->local_addr6, addrbuf, sizeof(addrbuf)); + slog(LOG_INFO, "TAYGA's IPv6 address: %s\n", addrbuf); + m6 = list_entry(gcfg->map6_list.prev, struct map6, list); + if (m6->type == MAP_TYPE_RFC6052) { + inet_ntop(AF_INET6, &m6->addr, addrbuf, sizeof(addrbuf)); + slog(LOG_INFO, "NAT64 prefix: %s/%d\n", + addrbuf, m6->prefix_len); + if (m6->addr.s6_addr32[0] == WKPF) + slog(LOG_INFO, "Note: traffic between IPv6 hosts and " + "private IPv4 addresses (i.e. to/from " + "64:ff9b::10.0.0.0/104, " + "64:ff9b::192.168.0.0/112, etc) " + "will be dropped. Use a translation " + "prefix within your organization's " + "IPv6 address space instead of " + "64:ff9b::/96 if you need your " + "IPv6 hosts to communicate with " + "private IPv4 addresses.\n"); + } + if (gcfg->dynamic_pool) { + inet_ntop(AF_INET, &gcfg->dynamic_pool->map4.addr, + addrbuf, sizeof(addrbuf)); + slog(LOG_INFO, "Dynamic pool: %s/%d\n", addrbuf, + gcfg->dynamic_pool->map4.prefix_len); + if (gcfg->data_dir[0]) + load_dynamic(gcfg->dynamic_pool); + else + slog(LOG_INFO, "Note: dynamically-assigned mappings " + "will not be saved across restarts. " + "Specify data-dir in %s if you would " + "like dynamic mappings to be " + "persistent.\n", conffile); + } + + if (gcfg->cache_size) + create_cache(); + + gcfg->recv_buf = (uint8_t *)malloc(gcfg->recv_buf_size); + if (!gcfg->recv_buf) { + slog(LOG_CRIT, "Error: unable to allocate %d bytes for " + "receive buffer\n", gcfg->recv_buf_size); + exit(1); + } + + memset(pollfds, 0, 2 * sizeof(struct pollfd)); + pollfds[0].fd = signalfds[0]; + pollfds[0].events = POLLIN; + pollfds[1].fd = gcfg->tun_fd; + pollfds[1].events = POLLIN; + + for (;;) { + ret = poll(pollfds, 2, POOL_CHECK_INTERVAL * 1000); + if (ret < 0) { + if (errno == EINTR) + continue; + slog(LOG_ERR, "poll returned error %s\n", + strerror(errno)); + exit(1); + } + time(&now); + if (pollfds[0].revents) + read_from_signalfd(); + if (pollfds[1].revents) + read_from_tun(); + if (gcfg->cache_size && (gcfg->last_cache_maint + + CACHE_CHECK_INTERVAL < now || + gcfg->last_cache_maint > now)) { + addrmap_maint(); + gcfg->last_cache_maint = now; + } + if (gcfg->dynamic_pool && (gcfg->last_dynamic_maint + + POOL_CHECK_INTERVAL < now || + gcfg->last_dynamic_maint > now)) { + dynamic_maint(gcfg->dynamic_pool, 0); + gcfg->last_dynamic_maint = now; + } + } + + return 0; +} diff --git a/tayga.conf.5 b/tayga.conf.5 new file mode 100644 index 0000000..3e084aa --- /dev/null +++ b/tayga.conf.5 @@ -0,0 +1,186 @@ +.TH TAYGA.CONF "5" "June 2011" "TAYGA 0.9.2" "" +.SH NAME +tayga.conf \- configuration file of the TAYGA stateless NAT64 daemon +.SH DESCRIPTION +This file contains the configuration parameters for the TAYGA stateless NAT64 +daemon. It must exist and contain the mandatory configuration items or +TAYGA will refuse to run. +.P +The configuration directives are listed below. With the exception of the +.B map +directive, only one instance of each directive may appear in tayga.conf. +.TP +.BI "tun-device " device +Name of the network interface that will be created by the kernel TUN module +for TAYGA to exchange IPv4 and IPv6 packets with the in-kernel TCP/IP stack. +If +.I device +does not already exist as a persistent interface (created by the +.B \-\-mktun +flag to tayga(8), for example), it will be created automatically when the +TAYGA daemon starts and destroyed when the daemon exits. +.IP +Note that TAYGA does not configure the host-side parameters of +.I device. +This must be done by the system administrator using the ifconfig(8), route(8), +and/or ip(8) commands. +.IP +This configuration directive is mandatory. +.TP +.BI "ipv4-addr " ipv4_address +IPv4 address that TAYGA will use as the source address for ICMPv4 errors +generated by the translation process. TAYGA will also respond to ICMP echo +requests (pings) at this address. +.IP +.I ipv4_address +is permitted to overlap with the prefix specified in the +.B dynamic-pool +directive, in which case +.I ipv4_address +will be removed from the pool of available addresses. +.IP +This configuration directive is mandatory. +.TP +.BI "ipv6-addr " ipv6_address +IPv6 address that TAYGA will use as the source address for ICMPv6 errors +generated by the translation process. TAYGA will also respond to ICMPv6 echo +requests (pings) at this address. +.IP +This configuration directive is mandatory unless the NAT64 prefix is specified +with the +.B prefix +directive, in which case TAYGA will generate its IPv6 address by mapping the +address specified in +.B ipv4-addr +into the NAT64 prefix. +.TP +.BI "prefix " ipv6_address/length +NAT64 prefix for mapping IPv4 addresses into the IPv6 address space. TAYGA +performs address translation as specified in RFC 6052, and only prefix lengths +allowed in that document will be permitted in the +.B prefix +directive. +.IP +The use of either a Network-Specific Prefix or the Well-Known Prefix +(64:ff9b::/96) is allowed, +.B however, +as required by RFC 6052, TAYGA will refuse to translate packets with a +source or destination address composed of the Well-Known Prefix and a +non-global IPv4 address (10.x.x.x, 192.168.x.x, etc). +.IP +Use of the +.B prefix +directive is optional. If it is not specified, all addresses to be translated +must be listed individually with the +.B map +directive. +.TP +.BI "map " "ipv4_address ipv6_address" +Creates a static mapping between +.I ipv4_address +and +.I ipv6_address +to be used when translating IPv4 packets to IPv6 or IPv6 packets to IPv4. +Multiple +.B map +directives are permitted in the tayga.conf file. +.IP +.I ipv4_address +is permitted to overlap with the prefix specified in the +.B dynamic-pool +directive, in which case +.I ipv4_address +will be removed from the pool of available addresses. +.IP +.I ipv6_address +.B "must not" +overlap with the prefix specified in the +.B prefix +directive. +.TP +.BI "dynamic-pool " ipv4_address/length +Address prefix containing addresses available to be assigned to IPv6 hosts. +.I +length +must be 31 or less, as the lowest-numbered address in the prefix is considered +reserved and will not be used for dynamic assignment. +.IP +If TAYGA receives an IPv6 packet to be translated with an IPv6 source address +that does not match any existing mapping rules (as specified by the +.B map +directive or the +.B prefix +directive), TAYGA will create a dynamic mapping between the IPv6 address and +an IPv4 address drawn from the prefix specified by the +.B dynamic-pool +directive. This mapping will be valid for two hours and four minutes after +the last packet matching the mapping is translated. +.IP +The +.B dynamic-pool +directive is optional. If it is not specified, all IPv6 addresses appearing +in packets passing through TAYGA must match the NAT64 prefix or a static +mapping rule. +.TP +.BI "data-dir " path +The absolute path of a directory where TAYGA should store its data files. +Presently the only data file that TAYGA will store is the +.I dynamic.map +file, which tracks dynamic address assignments made from the dynamic pool. +.IP +.I path +is also the directory that will be used as a chroot(2) "jail" if the +.B \-\-chroot +command-line option is specified to the TAYGA daemon. +.IP +The TAYGA daemon must have full permissions (rwx) to +.I path +after it has dropped superuser privileges. Generally this means that the +owner of +.I path +should be the user specified in the +.B \-\-user +command-line option. +.IP +The +.B data-dir +directive is optional, but without it, dynamic mappings will be lost when the +TAYGA daemon is stopped. Also, use of the +.B \-\-chroot +command-line option will not be possible. +.TP +.BI "strict-frag-hdr " on|off|true|false|1|0 +Flag to control whether TAYGA adds fragmentation headers to IPv6 packets that +do not require fragmentation. RFC 6145 stipulates that the fragmentation +header SHOULD be added to all translated packets when the sender has not set +the DF (Don't Fragment) flag, to indicate that the sender allows fragmentation +and may not support path MTU discovery. Unfortunately, some firewall +implementations drop IPv6 packets that are fragmented into a single fragment, +most notably Linux netfilter conntrack in kernels older than 2.6.34. +.IP +When +.B strict-frag-hdr +is set to +.B true, on, +or +.B 1, +fragmentation headers will be added to all translated packets where the +DF bit in the original packet is clear. This is the RFC-complaint behavior. +.IP +When +.B strict-frag-hdr +is set to +.B false, off, +or +.B 0, +fragmentation headers will be suppressed when the translated packet fits +entirely within the IPv6 network MTU (1280 bytes). This is the default +behavior. +.IP +This setting does not affect packets that arrive at TAYGA already fragmented, +or packets that must be fragmented to fit within the IPv6 network MTU. + +.SH "SEE ALSO" +.BR tayga (8) +.br +.BR diff --git a/tayga.conf.example b/tayga.conf.example new file mode 100644 index 0000000..e5603d7 --- /dev/null +++ b/tayga.conf.example @@ -0,0 +1,102 @@ +# +# Sample configuration file for TAYGA 0.9.2 +# +# Modify this to use your own addresses!! +# + +# +# TUN device that TAYGA will use to exchange IPv4 and IPv6 packets with the +# kernel. You may use any name you like, but `nat64' is recommended. +# +# This device may be created before starting the tayga daemon by running +# `tayga --mktun`. This allows routing and firewall rules to be set up prior +# to commencement of packet translation. +# +# Mandatory. +# +tun-device nat64 + +# +# TAYGA's IPv4 address. This is NOT your router's IPv4 address! TAYGA +# requires its own address because it acts as an IPv4 and IPv6 router, and +# needs to be able to send ICMP messages. TAYGA will also respond to ICMP +# echo requests (ping) at this address. +# +# This address can safely be located inside the dynamic-pool prefix. +# +# Mandatory. +# +ipv4-addr 192.168.255.1 + +# +# TAYGA's IPv6 address. This is NOT your router's IPv6 address! TAYGA +# requires its own address because it acts as an IPv4 and IPv6 router, and +# needs to be able to send ICMP messages. TAYGA will also respond to ICMP +# echo requests (ping6) at this address. +# +# You can leave ipv6-addr unspecified and TAYGA will construct its IPv6 +# address using ipv4-addr and the NAT64 prefix. +# +# Optional if the NAT64 prefix is specified, otherwise mandatory. It is also +# mandatory if the NAT64 prefix is 64:ff9b::/96 and ipv4-addr is a private +# (RFC1918) address. +# +#ipv6-addr 2001:db8:1::2 + +# +# The NAT64 prefix. The IPv4 address space is mapped into the IPv6 address +# space by prepending this prefix to the IPv4 address. Using a /96 prefix is +# recommended in most situations, but all lengths specified in RFC 6052 are +# supported. +# +# This must be a prefix selected from your organization's IPv6 address space +# or the Well-Known Prefix 64:ff9b::/96. Note that using the Well-Known +# Prefix will prohibit IPv6 hosts from contacting IPv4 hosts that have private +# (RFC1918) addresses, per RFC 6052. +# +# The NAT64 prefix need not be specified if all required address mappings are +# listed in `map' directives. (See below.) +# +# Optional. +# +prefix 2001:db8:1:ffff::/96 +# prefix 64:ff9b::/96 + +# +# Dynamic pool prefix. IPv6 hosts which send traffic through TAYGA (and do +# not correspond to a static map or an IPv4-translatable address in the NAT64 +# prefix) will be assigned an IPv4 address from the dynamic pool. Dynamic +# maps are valid for 124 minutes after the last matching packet is seen. +# +# If no unassigned addresses remain in the dynamic pool (or no dynamic pool is +# configured), packets from unknown IPv6 hosts will be rejected with an ICMP +# unreachable error. +# +# Optional. +# +dynamic-pool 192.168.255.0/24 + +# +# Persistent data storage directory. The dynamic.map file, which saves the +# dynamic maps that are created from dynamic-pool, is stored in this +# directory. Omit if you do not need these maps to be persistent between +# instances of TAYGA. +# +# Optional. +# +data-dir /var/db/tayga + +# +# Establishes a single-host map. If an IPv6 host should be consistently +# reachable at a specific IPv4 address, the mapping can be specified in a +# `map' directive. (IPv6 hosts numbered with an IPv4-translatable address do +# not need map directives.) +# +# IPv4 addresses specified in the `map' directive can safely be located inside +# the dynamic-pool prefix. +# +# Optional. +# +#map 192.168.5.42 2001:db8:1:4444::1 +#map 192.168.5.43 2001:db8:1:4444::2 +#map 192.168.255.2 2001:db8:1:569::143 diff --git a/tayga.h b/tayga.h new file mode 100644 index 0000000..2284d2a --- /dev/null +++ b/tayga.h @@ -0,0 +1,284 @@ +/* + * tayga.h -- main header file + * + * part of TAYGA + * Copyright (C) 2010 Nathan Lutchansky + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "list.h" +#include "config.h" + + +/* Configuration knobs */ + +/* Number of seconds of silence before a map ages out of the cache */ +#define CACHE_MAX_AGE 120 + +/* Number of seconds between cache ageing passes */ +#define CACHE_CHECK_INTERVAL 5 + +/* Number of seconds between dynamic pool ageing passes */ +#define POOL_CHECK_INTERVAL 45 + +/* Valid token delimiters in config file and dynamic map file */ +#define DELIM " \t\r\n" + + +/* Protocol structures */ + +struct ip4 { + uint8_t ver_ihl; /* 7-4: ver==4, 3-0: IHL */ + uint8_t tos; + uint16_t length; + uint16_t ident; + uint16_t flags_offset; /* 15-13: flags, 12-0: frag offset */ + uint8_t ttl; + uint8_t proto; + uint16_t cksum; + struct in_addr src; + struct in_addr dest; +} __attribute__ ((__packed__)); + +#define IP4_F_DF 0x4000 +#define IP4_F_MF 0x2000 +#define IP4_F_MASK 0x1fff + +struct ip6 { + uint32_t ver_tc_fl; /* 31-28: ver==6, 27-20: traf cl, 19-0: flow lbl */ + uint16_t payload_length; + uint8_t next_header; + uint8_t hop_limit; + struct in6_addr src; + struct in6_addr dest; +} __attribute__ ((__packed__)); + +struct ip6_frag { + uint8_t next_header; + uint8_t reserved; + uint16_t offset_flags; /* 15-3: frag offset, 2-0: flags */ + uint32_t ident; +} __attribute__ ((__packed__)); + +#define IP6_F_MF 0x0001 +#define IP6_F_MASK 0xfff8 + +struct icmp { + uint8_t type; + uint8_t code; + uint16_t cksum; + uint32_t word; +} __attribute__ ((__packed__)); + +#define WKPF (htonl(0x0064ff9b)) + +/* Adjusting the MTU by 20 does not leave room for the IP6 fragmentation + header, for fragments with the DF bit set. Follow up with BEHAVE on this. + + (See http://www.ietf.org/mail-archive/web/behave/current/msg08499.html) + */ +#define MTU_ADJ 20 + + +/* TAYGA data definitions */ + +struct pkt { + struct ip4 *ip4; + struct ip6 *ip6; + struct ip6_frag *ip6_frag; + struct icmp *icmp; + uint8_t data_proto; + uint8_t *data; + uint32_t data_len; + uint32_t header_len; /* inc IP hdr for v4 but excl IP hdr for v6 */ +}; + +enum { + MAP_TYPE_STATIC, + MAP_TYPE_RFC6052, + MAP_TYPE_DYNAMIC_POOL, + MAP_TYPE_DYNAMIC_HOST, +}; + +struct map4 { + struct in_addr addr; + struct in_addr mask; + int prefix_len; + int type; + struct list_head list; +}; + +struct map6 { + struct in6_addr addr; + struct in6_addr mask; + int prefix_len; + int type; + struct list_head list; +}; + +struct map_static { + struct map4 map4; + struct map6 map6; + int conffile_lineno; +}; + +struct free_addr { + uint32_t addr; /* in-use address (host order) */ + uint32_t count; /* num of free addresses after addr */ + struct list_head list; +}; + +struct map_dynamic { + struct map4 map4; + struct map6 map6; + struct cache_entry *cache_entry; + time_t last_use; + struct list_head list; + struct free_addr free; +}; + +struct dynamic_pool { + struct map4 map4; + struct list_head mapped_list; + struct list_head dormant_list; + struct list_head free_list; + struct free_addr free_head; +}; + +struct cache_entry { + struct in6_addr addr6; + struct in_addr addr4; + time_t last_use; + uint32_t flags; + uint16_t ip4_ident; + struct list_head list; + struct list_head hash4; + struct list_head hash6; +}; + +#define CACHE_F_SEEN_4TO6 (1<<0) +#define CACHE_F_SEEN_6TO4 (1<<1) +#define CACHE_F_GEN_IDENT (1<<2) +#define CACHE_F_REP_AGEOUT (1<<3) + +struct config { + char tundev[IFNAMSIZ]; + char data_dir[512]; + uint32_t recv_buf_size; + struct in_addr local_addr4; + struct in6_addr local_addr6; + struct list_head map4_list; + struct list_head map6_list; + int dyn_min_lease; + int dyn_max_lease; + int max_commit_delay; + struct dynamic_pool *dynamic_pool; + int hash_bits; + int cache_size; + int allow_ident_gen; + int ipv6_offlink_mtu; + int lazy_frag_hdr; + + int urandom_fd; + int tun_fd; + + uint16_t mtu; + uint8_t *recv_buf; + + uint32_t rand[8]; + struct list_head cache_pool; + struct list_head cache_active; + time_t last_cache_maint; + struct list_head *hash_table4; + struct list_head *hash_table6; + + time_t last_dynamic_maint; + time_t last_map_write; + int map_write_pending; +}; + + +/* Macros and static functions */ + +/* Get a pointer to the object containing x, which is of type "type" and + * embeds x as a field called "field" */ +#define container_of(x, type, field) ({ \ + const typeof( ((type *)0)->field ) *__mptr = (x); \ + (type *)( (char *)__mptr - offsetof(type, field) );}) + +#define IN6_IS_IN_NET(addr,net,mask) \ + ((net)->s6_addr32[0] == ((addr)->s6_addr32[0] & \ + (mask)->s6_addr32[0]) && \ + (net)->s6_addr32[1] == ((addr)->s6_addr32[1] & \ + (mask)->s6_addr32[1]) && \ + (net)->s6_addr32[2] == ((addr)->s6_addr32[2] & \ + (mask)->s6_addr32[2]) && \ + (net)->s6_addr32[3] == ((addr)->s6_addr32[3] & \ + (mask)->s6_addr32[3])) + + +/* TAYGA function prototypes */ + +/* addrmap.c */ +int validate_ip4_addr(const struct in_addr *a); +int validate_ip6_addr(const struct in6_addr *a); +int is_private_ip4_addr(const struct in_addr *a); +int calc_ip4_mask(struct in_addr *mask, const struct in_addr *addr, int len); +int calc_ip6_mask(struct in6_addr *mask, const struct in6_addr *addr, int len); +void create_cache(void); +int insert_map4(struct map4 *m, struct map4 **conflict); +int insert_map6(struct map6 *m, struct map6 **conflict); +struct map4 *find_map4(const struct in_addr *addr4); +struct map6 *find_map6(const struct in6_addr *addr6); +int append_to_prefix(struct in6_addr *addr6, const struct in_addr *addr4, + const struct in6_addr *prefix, int prefix_len); +int map_ip4_to_ip6(struct in6_addr *addr6, const struct in_addr *addr4, + struct cache_entry **c_ptr); +int map_ip6_to_ip4(struct in_addr *addr4, const struct in6_addr *addr6, + struct cache_entry **c_ptr, int dyn_alloc); +void addrmap_maint(void); + +/* conffile.c */ +void read_config(char *conffile); + +/* dynamic.c */ +struct map6 *assign_dynamic(const struct in6_addr *addr6); +void load_dynamic(struct dynamic_pool *pool); +void dynamic_maint(struct dynamic_pool *pool, int shutdown); + +/* nat64.c */ +void handle_ip4(struct pkt *p); +void handle_ip6(struct pkt *p); + +/* tayga.c */ +void slog(int priority, const char *format, ...); +void read_random_bytes(void *d, int len);