cloud-agent/agent/cloudinit.c
2017-06-29 11:40:48 +02:00

117 lines
2.9 KiB
C

/*
* Copyright (c) 2017 Reyk Floeter <reyk@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/queue.h>
#include <sys/stat.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#include "main.h"
#include "http.h"
#include "xml.h"
static int cloudinit_fetch(struct system_config *);
static char *cloudinit_get(struct system_config *, const char *, size_t *);
int
ec2(struct system_config *sc)
{
if ((sc->sc_username = strdup("ec2-user")) == NULL ||
(sc->sc_endpoint = strdup("169.254.169.254")) == NULL) {
log_warnx("failed to set defaults");
return (-1);
}
return (cloudinit_fetch(sc));
}
int
cloudinit(struct system_config *sc)
{
/* XXX get endpoint from DHCP lease file */
if ((sc->sc_username = strdup("puffy")) == NULL ||
(sc->sc_endpoint = strdup("169.254.169.254")) == NULL) {
log_warnx("failed to set defaults");
return (-1);
}
return (cloudinit_fetch(sc));
}
static char *
cloudinit_get(struct system_config *sc, const char *path, size_t *strsz)
{
struct httpget *g = NULL;
char *str = NULL;
log_debug("%s: %s", __func__, path);
g = http_get(&sc->sc_addr, 1,
sc->sc_endpoint, 80, path, NULL, 0, NULL);
if (g != NULL && g->code == 200 && g->bodypartsz > 0) {
if ((str = calloc(1, g->bodypartsz + 1)) != NULL) {
memcpy(str, g->bodypart, g->bodypartsz);
if (strsz != NULL)
*strsz = g->bodypartsz;
}
}
http_get_free(g);
return (str);
}
static int
cloudinit_fetch(struct system_config *sc)
{
int ret = 0;
char *str = NULL;
sc->sc_addr.ip = sc->sc_endpoint;
sc->sc_addr.family = 4;
/* hostname */
if ((sc->sc_instance = cloudinit_get(sc,
"/latest/meta-data/instance-id", NULL)) == NULL)
goto fail;
/* hostname */
if ((sc->sc_hostname = cloudinit_get(sc,
"/latest/meta-data/local-hostname", NULL)) == NULL)
goto fail;
/* pubkey */
if ((str = cloudinit_get(sc,
"/latest/meta-data/public-keys/0/openssh-key", NULL)) == NULL)
goto fail;
if (agent_addpubkey(sc, str, NULL) != 0)
goto fail;
/* userdata */
if ((sc->sc_userdata = cloudinit_get(sc,
"/latest/user-data", &sc->sc_userdatalen)) == NULL)
goto fail;
ret = 0;
fail:
free(str);
return (ret);
}