137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
/*
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* Copyright (c) 2017 Reyk Floeter <reyk@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <err.h>
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#include "main.h"
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#include "http.h"
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#include "xml.h"
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static int cloudinit_fetch(struct system_config *);
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int
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tryendpoint(struct system_config *sc,
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int (fetch)(struct system_config *),
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int (next)(struct system_config *))
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{
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int errfd = -1, ret;
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free(sc->sc_endpoint);
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sc->sc_endpoint = NULL;
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switch (sc->sc_dhcpendpoint) {
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case 0:
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sc->sc_dhcpendpoint = 1;
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if (dhcp_getendpoint(sc) == -1)
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return tryendpoint(sc, fetch, next);
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break;
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case 1:
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sc->sc_dhcpendpoint = 2;
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if ((sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
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log_warnx("failed to set defaults");
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return (-1);
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}
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break;
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default:
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if (next == NULL)
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return (-1);
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sc->sc_dhcpendpoint = 0;
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return (*next)(sc);
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}
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errfd = disable_output(sc, STDERR_FILENO);
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ret = (*fetch)(sc);
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enable_output(sc, STDERR_FILENO, errfd);
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if (ret != 0)
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return tryendpoint(sc, fetch, next);
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return (0);
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}
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int
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ec2(struct system_config *sc)
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{
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free(sc->sc_username);
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if ((sc->sc_username = strdup("ec2-user")) == NULL) {
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log_warnx("failed to set default user");
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return (-1);
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}
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sc->sc_stack = "ec2";
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sc->sc_dhcpendpoint = 1;
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return tryendpoint(sc, cloudinit_fetch, NULL);
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}
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int
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cloudinit(struct system_config *sc)
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{
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sc->sc_stack = "cloudinit";
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sc->sc_dhcpendpoint = 0;
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return tryendpoint(sc, cloudinit_fetch, NULL);
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}
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static int
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cloudinit_fetch(struct system_config *sc)
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{
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int ret = -1;
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char *str = NULL;
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sc->sc_addr.ip = sc->sc_endpoint;
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sc->sc_addr.family = 4;
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/* instance-id */
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if ((sc->sc_instance = metadata(sc,
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"/latest/meta-data/instance-id", WORD)) == NULL)
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goto fail;
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/* hostname */
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if ((sc->sc_hostname = metadata(sc,
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"/latest/meta-data/local-hostname", WORD)) == NULL)
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goto fail;
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/* optional pubkey */
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if ((str = metadata(sc,
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"/latest/meta-data/public-keys/0/openssh-key", LINE)) == NULL &&
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(str = metadata(sc,
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"/latest/meta-data/public-keys", LINE)) == NULL)
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log_warnx("failed to get public key");
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else if (agent_addpubkey(sc, str, NULL) != 0)
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goto fail;
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/* optional username - this is an extension by meta-data(8) */
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if ((str = metadata(sc, "/latest/meta-data/username", WORD)) != NULL) {
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free(sc->sc_username);
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sc->sc_username = str;
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str = NULL;
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}
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/* userdata (optional) */
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sc->sc_userdata = metadata(sc, "/latest/user-data", TEXT);
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ret = 0;
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fail:
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free(str);
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return (ret);
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}
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