From 1c43cef4e51940bbc9aac82daed508fce9c5f502 Mon Sep 17 00:00:00 2001 From: Nico Schottelius Date: Thu, 14 Feb 2019 12:37:08 +0100 Subject: [PATCH] Import tayga 0.9.2 (downloaded 2019-02-14) Signed-off-by: Nico Schottelius --- COPYING | 340 ++++ Makefile.am | 9 + Makefile.in | 756 +++++++ README | 169 ++ aclocal.m4 | 951 +++++++++ addrmap.c | 631 ++++++ conffile.c | 492 +++++ config.h.in | 25 + configure | 4670 ++++++++++++++++++++++++++++++++++++++++++++ configure.ac | 14 + depcomp | 630 ++++++ dynamic.c | 396 ++++ install-sh | 520 +++++ list.h | 80 + missing | 376 ++++ nat64.c | 976 +++++++++ tayga.8 | 102 + tayga.c | 568 ++++++ tayga.conf.5 | 186 ++ tayga.conf.example | 102 + tayga.h | 284 +++ 21 files changed, 12277 insertions(+) create mode 100644 COPYING create mode 100644 Makefile.am create mode 100644 Makefile.in create mode 100644 README create mode 100644 aclocal.m4 create mode 100644 addrmap.c create mode 100644 conffile.c create mode 100644 config.h.in create mode 100755 configure create mode 100644 configure.ac create mode 100755 depcomp create mode 100644 dynamic.c create mode 100755 install-sh create mode 100644 list.h create mode 100755 missing create mode 100644 nat64.c create mode 100644 tayga.8 create mode 100644 tayga.c create mode 100644 tayga.conf.5 create mode 100644 tayga.conf.example create mode 100644 tayga.h 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. 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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; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +sbin_PROGRAMS = tayga$(EXEEXT) +subdir = . +DIST_COMMON = README $(am__configure_deps) $(dist_man_MANS) \ + $(dist_sysconf_DATA) $(srcdir)/Makefile.am \ + $(srcdir)/Makefile.in $(srcdir)/config.h.in \ + $(top_srcdir)/configure COPYING depcomp install-sh missing +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/configure.ac +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +am__CONFIG_DISTCLEAN_FILES = config.status config.cache config.log \ + configure.lineno config.status.lineno +mkinstalldirs = $(install_sh) -d +CONFIG_HEADER = config.h +CONFIG_CLEAN_FILES = +CONFIG_CLEAN_VPATH_FILES = +am__installdirs = "$(DESTDIR)$(sbindir)" "$(DESTDIR)$(man5dir)" \ + "$(DESTDIR)$(man8dir)" "$(DESTDIR)$(sysconfdir)" +PROGRAMS = $(sbin_PROGRAMS) +am_tayga_OBJECTS = nat64.$(OBJEXT) addrmap.$(OBJEXT) dynamic.$(OBJEXT) \ + tayga.$(OBJEXT) conffile.$(OBJEXT) +tayga_OBJECTS = $(am_tayga_OBJECTS) +tayga_LDADD = $(LDADD) +DEFAULT_INCLUDES = -I.@am__isrc@ +depcomp = $(SHELL) $(top_srcdir)/depcomp +am__depfiles_maybe = depfiles +am__mv = mv -f +COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \ + $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +CCLD = $(CC) +LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@ +SOURCES = $(tayga_SOURCES) +DIST_SOURCES = $(tayga_SOURCES) +am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; 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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);