/
confile.c
3083 lines (2649 loc) · 77 KB
/
confile.c
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/*
* lxc: linux Container library
*
* (C) Copyright IBM Corp. 2007, 2008
*
* Authors:
* Daniel Lezcano <daniel.lezcano at free.fr>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/utsname.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <net/if.h>
#include <time.h>
#include <dirent.h>
#include <syslog.h>
#include "bdev.h"
#include "parse.h"
#include "config.h"
#include "confile.h"
#include "utils.h"
#include "log.h"
#include "conf.h"
#include "network.h"
#include "lxcseccomp.h"
#if HAVE_IFADDRS_H
#include <ifaddrs.h>
#else
#include <../include/ifaddrs.h>
#endif
#if HAVE_SYS_PERSONALITY_H
#include <sys/personality.h>
#endif
lxc_log_define(lxc_confile, lxc);
static int config_personality(const char *, const char *, struct lxc_conf *);
static int config_pts(const char *, const char *, struct lxc_conf *);
static int config_tty(const char *, const char *, struct lxc_conf *);
static int config_ttydir(const char *, const char *, struct lxc_conf *);
static int config_kmsg(const char *, const char *, struct lxc_conf *);
static int config_lsm_aa_profile(const char *, const char *, struct lxc_conf *);
static int config_lsm_aa_incomplete(const char *, const char *, struct lxc_conf *);
static int config_lsm_se_context(const char *, const char *, struct lxc_conf *);
static int config_cgroup(const char *, const char *, struct lxc_conf *);
static int config_idmap(const char *, const char *, struct lxc_conf *);
static int config_loglevel(const char *, const char *, struct lxc_conf *);
static int config_logfile(const char *, const char *, struct lxc_conf *);
static int config_mount(const char *, const char *, struct lxc_conf *);
static int config_mount_auto(const char *, const char *, struct lxc_conf *);
static int config_fstab(const char *, const char *, struct lxc_conf *);
static int config_rootfs(const char *, const char *, struct lxc_conf *);
static int config_rootfs_mount(const char *, const char *, struct lxc_conf *);
static int config_rootfs_options(const char *, const char *, struct lxc_conf *);
static int config_rootfs_backend(const char *, const char *, struct lxc_conf *);
static int config_pivotdir(const char *, const char *, struct lxc_conf *);
static int config_utsname(const char *, const char *, struct lxc_conf *);
static int config_hook(const char *, const char *, struct lxc_conf *lxc_conf);
static int config_network(const char *, const char *, struct lxc_conf *);
static int config_network_type(const char *, const char *, struct lxc_conf *);
static int config_network_flags(const char *, const char *, struct lxc_conf *);
static int config_network_link(const char *, const char *, struct lxc_conf *);
static int config_network_name(const char *, const char *, struct lxc_conf *);
static int config_network_veth_pair(const char *, const char *, struct lxc_conf *);
static int config_network_macvlan_mode(const char *, const char *, struct lxc_conf *);
static int config_network_hwaddr(const char *, const char *, struct lxc_conf *);
static int config_network_vlan_id(const char *, const char *, struct lxc_conf *);
static int config_network_mtu(const char *, const char *, struct lxc_conf *);
static int config_network_ipv4(const char *, const char *, struct lxc_conf *);
static int config_network_ipv4_gateway(const char *, const char *, struct lxc_conf *);
static int config_network_script_up(const char *, const char *, struct lxc_conf *);
static int config_network_script_down(const char *, const char *, struct lxc_conf *);
static int config_network_ipv6(const char *, const char *, struct lxc_conf *);
static int config_network_ipv6_gateway(const char *, const char *, struct lxc_conf *);
static int config_cap_drop(const char *, const char *, struct lxc_conf *);
static int config_cap_keep(const char *, const char *, struct lxc_conf *);
static int config_console(const char *, const char *, struct lxc_conf *);
static int config_console_logfile(const char *, const char *, struct lxc_conf *);
static int config_seccomp(const char *, const char *, struct lxc_conf *);
static int config_includefile(const char *, const char *, struct lxc_conf *);
static int config_network_nic(const char *, const char *, struct lxc_conf *);
static int config_autodev(const char *, const char *, struct lxc_conf *);
static int config_haltsignal(const char *, const char *, struct lxc_conf *);
static int config_rebootsignal(const char *, const char *, struct lxc_conf *);
static int config_stopsignal(const char *, const char *, struct lxc_conf *);
static int config_start(const char *, const char *, struct lxc_conf *);
static int config_syslog(const char *, const char *, struct lxc_conf *);
static int config_monitor(const char *, const char *, struct lxc_conf *);
static int config_group(const char *, const char *, struct lxc_conf *);
static int config_environment(const char *, const char *, struct lxc_conf *);
static int config_init_cmd(const char *, const char *, struct lxc_conf *);
static int config_init_uid(const char *, const char *, struct lxc_conf *);
static int config_init_gid(const char *, const char *, struct lxc_conf *);
static int config_ephemeral(const char *, const char *, struct lxc_conf *);
static int config_no_new_privs(const char *, const char *, struct lxc_conf *);
static struct lxc_config_t config[] = {
{ "lxc.arch", config_personality },
{ "lxc.pts", config_pts },
{ "lxc.tty", config_tty },
{ "lxc.devttydir", config_ttydir },
{ "lxc.kmsg", config_kmsg },
{ "lxc.aa_profile", config_lsm_aa_profile },
{ "lxc.aa_allow_incomplete", config_lsm_aa_incomplete },
{ "lxc.se_context", config_lsm_se_context },
{ "lxc.cgroup", config_cgroup },
{ "lxc.id_map", config_idmap },
{ "lxc.loglevel", config_loglevel },
{ "lxc.logfile", config_logfile },
{ "lxc.mount.entry", config_mount },
{ "lxc.mount.auto", config_mount_auto },
{ "lxc.mount", config_fstab },
{ "lxc.rootfs.mount", config_rootfs_mount },
{ "lxc.rootfs.options", config_rootfs_options },
{ "lxc.rootfs.backend", config_rootfs_backend },
{ "lxc.rootfs", config_rootfs },
{ "lxc.pivotdir", config_pivotdir },
{ "lxc.utsname", config_utsname },
{ "lxc.hook.pre-start", config_hook },
{ "lxc.hook.pre-mount", config_hook },
{ "lxc.hook.mount", config_hook },
{ "lxc.hook.autodev", config_hook },
{ "lxc.hook.start", config_hook },
{ "lxc.hook.stop", config_hook },
{ "lxc.hook.post-stop", config_hook },
{ "lxc.hook.clone", config_hook },
{ "lxc.hook.destroy", config_hook },
{ "lxc.hook", config_hook },
{ "lxc.network.type", config_network_type },
{ "lxc.network.flags", config_network_flags },
{ "lxc.network.link", config_network_link },
{ "lxc.network.name", config_network_name },
{ "lxc.network.macvlan.mode", config_network_macvlan_mode },
{ "lxc.network.veth.pair", config_network_veth_pair },
{ "lxc.network.script.up", config_network_script_up },
{ "lxc.network.script.down", config_network_script_down },
{ "lxc.network.hwaddr", config_network_hwaddr },
{ "lxc.network.mtu", config_network_mtu },
{ "lxc.network.vlan.id", config_network_vlan_id },
{ "lxc.network.ipv4.gateway", config_network_ipv4_gateway },
{ "lxc.network.ipv4", config_network_ipv4 },
{ "lxc.network.ipv6.gateway", config_network_ipv6_gateway },
{ "lxc.network.ipv6", config_network_ipv6 },
/* config_network_nic must come after all other 'lxc.network.*' entries */
{ "lxc.network.", config_network_nic },
{ "lxc.network", config_network },
{ "lxc.cap.drop", config_cap_drop },
{ "lxc.cap.keep", config_cap_keep },
{ "lxc.console.logfile", config_console_logfile },
{ "lxc.console", config_console },
{ "lxc.seccomp", config_seccomp },
{ "lxc.include", config_includefile },
{ "lxc.autodev", config_autodev },
{ "lxc.haltsignal", config_haltsignal },
{ "lxc.rebootsignal", config_rebootsignal },
{ "lxc.stopsignal", config_stopsignal },
{ "lxc.start.auto", config_start },
{ "lxc.start.delay", config_start },
{ "lxc.start.order", config_start },
{ "lxc.monitor.unshare", config_monitor },
{ "lxc.group", config_group },
{ "lxc.environment", config_environment },
{ "lxc.init_cmd", config_init_cmd },
{ "lxc.init_uid", config_init_uid },
{ "lxc.init_gid", config_init_gid },
{ "lxc.ephemeral", config_ephemeral },
{ "lxc.syslog", config_syslog },
{ "lxc.no_new_privs", config_no_new_privs },
};
struct signame {
int num;
const char *name;
};
static const struct signame signames[] = {
{ SIGHUP, "HUP" },
{ SIGINT, "INT" },
{ SIGQUIT, "QUIT" },
{ SIGILL, "ILL" },
{ SIGABRT, "ABRT" },
{ SIGFPE, "FPE" },
{ SIGKILL, "KILL" },
{ SIGSEGV, "SEGV" },
{ SIGPIPE, "PIPE" },
{ SIGALRM, "ALRM" },
{ SIGTERM, "TERM" },
{ SIGUSR1, "USR1" },
{ SIGUSR2, "USR2" },
{ SIGCHLD, "CHLD" },
{ SIGCONT, "CONT" },
{ SIGSTOP, "STOP" },
{ SIGTSTP, "TSTP" },
{ SIGTTIN, "TTIN" },
{ SIGTTOU, "TTOU" },
#ifdef SIGTRAP
{ SIGTRAP, "TRAP" },
#endif
#ifdef SIGIOT
{ SIGIOT, "IOT" },
#endif
#ifdef SIGEMT
{ SIGEMT, "EMT" },
#endif
#ifdef SIGBUS
{ SIGBUS, "BUS" },
#endif
#ifdef SIGSTKFLT
{ SIGSTKFLT, "STKFLT" },
#endif
#ifdef SIGCLD
{ SIGCLD, "CLD" },
#endif
#ifdef SIGURG
{ SIGURG, "URG" },
#endif
#ifdef SIGXCPU
{ SIGXCPU, "XCPU" },
#endif
#ifdef SIGXFSZ
{ SIGXFSZ, "XFSZ" },
#endif
#ifdef SIGVTALRM
{ SIGVTALRM, "VTALRM" },
#endif
#ifdef SIGPROF
{ SIGPROF, "PROF" },
#endif
#ifdef SIGWINCH
{ SIGWINCH, "WINCH" },
#endif
#ifdef SIGIO
{ SIGIO, "IO" },
#endif
#ifdef SIGPOLL
{ SIGPOLL, "POLL" },
#endif
#ifdef SIGINFO
{ SIGINFO, "INFO" },
#endif
#ifdef SIGLOST
{ SIGLOST, "LOST" },
#endif
#ifdef SIGPWR
{ SIGPWR, "PWR" },
#endif
#ifdef SIGUNUSED
{ SIGUNUSED, "UNUSED" },
#endif
#ifdef SIGSYS
{ SIGSYS, "SYS" },
#endif
};
static const size_t config_size = sizeof(config)/sizeof(struct lxc_config_t);
extern struct lxc_config_t *lxc_getconfig(const char *key)
{
size_t i;
for (i = 0; i < config_size; i++)
if (!strncmp(config[i].name, key,
strlen(config[i].name)))
return &config[i];
return NULL;
}
#define strprint(str, inlen, ...) \
do { \
len = snprintf(str, inlen, ##__VA_ARGS__); \
if (len < 0) { SYSERROR("snprintf"); return -1; }; \
fulllen += len; \
if (inlen > 0) { \
if (str) str += len; \
inlen -= len; \
if (inlen < 0) inlen = 0; \
} \
} while (0);
int lxc_listconfigs(char *retv, int inlen)
{
size_t i;
int fulllen = 0, len;
if (!retv)
inlen = 0;
else
memset(retv, 0, inlen);
for (i = 0; i < config_size; i++) {
char *s = config[i].name;
if (s[strlen(s)-1] == '.')
continue;
strprint(retv, inlen, "%s\n", s);
}
return fulllen;
}
static int config_string_item(char **conf_item, const char *value)
{
char *new_value;
if (!value || strlen(value) == 0) {
free(*conf_item);
*conf_item = NULL;
return 0;
}
new_value = strdup(value);
if (!new_value) {
SYSERROR("failed to strdup '%s': %m", value);
return -1;
}
free(*conf_item);
*conf_item = new_value;
return 0;
}
static int config_string_item_max(char **conf_item, const char *value,
size_t max)
{
if (strlen(value) >= max) {
ERROR("%s is too long (>= %lu)", value, (unsigned long)max);
return -1;
}
return config_string_item(conf_item, value);
}
static int config_path_item(char **conf_item, const char *value)
{
return config_string_item_max(conf_item, value, PATH_MAX);
}
/*
* config entry is something like "lxc.network.0.ipv4"
* the key 'lxc.network.' was found. So we make sure next
* comes an integer, find the right callback (by rewriting
* the key), and call it.
*/
static int config_network_nic(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
char *copy = strdup(key), *p;
int ret = -1;
struct lxc_config_t *config;
if (!copy) {
SYSERROR("failed to allocate memory");
return -1;
}
/*
* ok we know that to get here we've got "lxc.network."
* and it isn't any of the other network entries. So
* after the second . should come an integer (# of defined
* nic) followed by a valid entry.
*/
if (*(key+12) < '0' || *(key+12) > '9')
goto out;
p = strchr(key+12, '.');
if (!p)
goto out;
strcpy(copy+12, p+1);
config = lxc_getconfig(copy);
if (!config) {
ERROR("unknown key %s", key);
goto out;
}
ret = config->cb(key, value, lxc_conf);
out:
free(copy);
return ret;
}
static int config_network(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
if (value && strlen(value)) {
ERROR("lxc.network must not have a value");
return -1;
}
return lxc_clear_config_network(lxc_conf);
}
static int macvlan_mode(int *valuep, const char *value);
static int config_network_type(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_list *network = &lxc_conf->network;
struct lxc_netdev *netdev;
struct lxc_list *list;
if (!value || strlen(value) == 0)
return lxc_clear_config_network(lxc_conf);
netdev = malloc(sizeof(*netdev));
if (!netdev) {
SYSERROR("failed to allocate memory");
return -1;
}
memset(netdev, 0, sizeof(*netdev));
lxc_list_init(&netdev->ipv4);
lxc_list_init(&netdev->ipv6);
list = malloc(sizeof(*list));
if (!list) {
SYSERROR("failed to allocate memory");
free(netdev);
return -1;
}
lxc_list_init(list);
list->elem = netdev;
lxc_list_add_tail(network, list);
if (!strcmp(value, "veth"))
netdev->type = LXC_NET_VETH;
else if (!strcmp(value, "macvlan")) {
netdev->type = LXC_NET_MACVLAN;
macvlan_mode(&netdev->priv.macvlan_attr.mode, "private");
}
else if (!strcmp(value, "vlan"))
netdev->type = LXC_NET_VLAN;
else if (!strcmp(value, "phys"))
netdev->type = LXC_NET_PHYS;
else if (!strcmp(value, "empty"))
netdev->type = LXC_NET_EMPTY;
else if (!strcmp(value, "none"))
netdev->type = LXC_NET_NONE;
else {
ERROR("invalid network type %s", value);
return -1;
}
return 0;
}
static int config_ip_prefix(struct in_addr *addr)
{
if (IN_CLASSA(addr->s_addr))
return 32 - IN_CLASSA_NSHIFT;
if (IN_CLASSB(addr->s_addr))
return 32 - IN_CLASSB_NSHIFT;
if (IN_CLASSC(addr->s_addr))
return 32 - IN_CLASSC_NSHIFT;
return 0;
}
/*
* if you have p="lxc.network.0.link", pass it p+12
* to get back '0' (the index of the nic)
*/
static int get_network_netdev_idx(const char *key)
{
int ret, idx;
if (*key < '0' || *key > '9')
return -1;
ret = sscanf(key, "%d", &idx);
if (ret != 1)
return -1;
return idx;
}
/*
* if you have p="lxc.network.0", pass this p+12 and it will return
* the netdev of the first configured nic
*/
static struct lxc_netdev *get_netdev_from_key(const char *key,
struct lxc_list *network)
{
int i = 0, idx = get_network_netdev_idx(key);
struct lxc_netdev *netdev = NULL;
struct lxc_list *it;
if (idx == -1)
return NULL;
lxc_list_for_each(it, network) {
if (idx == i++) {
netdev = it->elem;
break;
}
}
return netdev;
}
extern int lxc_list_nicconfigs(struct lxc_conf *c, const char *key,
char *retv, int inlen)
{
struct lxc_netdev *netdev;
int fulllen = 0, len;
netdev = get_netdev_from_key(key+12, &c->network);
if (!netdev)
return -1;
if (!retv)
inlen = 0;
else
memset(retv, 0, inlen);
strprint(retv, inlen, "type\n");
strprint(retv, inlen, "script.up\n");
strprint(retv, inlen, "script.down\n");
if (netdev->type != LXC_NET_EMPTY) {
strprint(retv, inlen, "flags\n");
strprint(retv, inlen, "link\n");
strprint(retv, inlen, "name\n");
strprint(retv, inlen, "hwaddr\n");
strprint(retv, inlen, "mtu\n");
strprint(retv, inlen, "ipv6\n");
strprint(retv, inlen, "ipv6.gateway\n");
strprint(retv, inlen, "ipv4\n");
strprint(retv, inlen, "ipv4.gateway\n");
}
switch(netdev->type) {
case LXC_NET_VETH:
strprint(retv, inlen, "veth.pair\n");
break;
case LXC_NET_MACVLAN:
strprint(retv, inlen, "macvlan.mode\n");
break;
case LXC_NET_VLAN:
strprint(retv, inlen, "vlan.id\n");
break;
case LXC_NET_PHYS:
break;
}
return fulllen;
}
static struct lxc_netdev *network_netdev(const char *key, const char *value,
struct lxc_list *network)
{
struct lxc_netdev *netdev = NULL;
if (lxc_list_empty(network)) {
ERROR("network is not created for '%s' = '%s' option",
key, value);
return NULL;
}
if (get_network_netdev_idx(key+12) == -1)
netdev = lxc_list_last_elem(network);
else
netdev = get_netdev_from_key(key+12, network);
if (!netdev) {
ERROR("no network device defined for '%s' = '%s' option",
key, value);
return NULL;
}
return netdev;
}
static int network_ifname(char **valuep, const char *value)
{
return config_string_item_max(valuep, value, IFNAMSIZ);
}
#ifndef MACVLAN_MODE_PRIVATE
# define MACVLAN_MODE_PRIVATE 1
#endif
#ifndef MACVLAN_MODE_VEPA
# define MACVLAN_MODE_VEPA 2
#endif
#ifndef MACVLAN_MODE_BRIDGE
# define MACVLAN_MODE_BRIDGE 4
#endif
#ifndef MACVLAN_MODE_PASSTHRU
# define MACVLAN_MODE_PASSTHRU 8
#endif
static int macvlan_mode(int *valuep, const char *value)
{
struct mc_mode {
char *name;
int mode;
} m[] = {
{ "private", MACVLAN_MODE_PRIVATE },
{ "vepa", MACVLAN_MODE_VEPA },
{ "bridge", MACVLAN_MODE_BRIDGE },
{ "passthru", MACVLAN_MODE_PASSTHRU },
};
size_t i;
for (i = 0; i < sizeof(m)/sizeof(m[0]); i++) {
if (strcmp(m[i].name, value))
continue;
*valuep = m[i].mode;
return 0;
}
return -1;
}
static int rand_complete_hwaddr(char *hwaddr)
{
const char hex[] = "0123456789abcdef";
char *curs = hwaddr;
#ifndef HAVE_RAND_R
randseed(true);
#else
unsigned int seed=randseed(false);
#endif
while (*curs != '\0' && *curs != '\n')
{
if ( *curs == 'x' || *curs == 'X' ) {
if (curs - hwaddr == 1) {
//ensure address is unicast
#ifdef HAVE_RAND_R
*curs = hex[rand_r(&seed) & 0x0E];
} else {
*curs = hex[rand_r(&seed) & 0x0F];
#else
*curs = hex[rand() & 0x0E];
} else {
*curs = hex[rand() & 0x0F];
#endif
}
}
curs++;
}
return 0;
}
static int config_network_flags(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
netdev->flags |= IFF_UP;
return 0;
}
static int set_network_link(const char *key, const char *value, struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
return network_ifname(&netdev->link, value);
}
static int create_matched_ifnames(const char *value, struct lxc_conf *lxc_conf)
{
struct ifaddrs *ifaddr, *ifa;
const char *type_key = "lxc.network.type";
const char *link_key = "lxc.network.link";
const char *tmpvalue = "phys";
int n, ret = 0;
if (getifaddrs(&ifaddr) == -1) {
SYSERROR("Get network interfaces failed");
return -1;
}
for (ifa = ifaddr, n = 0; ifa != NULL; ifa = ifa->ifa_next, n++) {
if (!ifa->ifa_addr)
continue;
if (ifa->ifa_addr->sa_family != AF_PACKET)
continue;
if (!strncmp(value, ifa->ifa_name, strlen(value)-1)) {
ret = config_network_type(type_key, tmpvalue, lxc_conf);
if (!ret) {
ret = set_network_link(link_key, ifa->ifa_name, lxc_conf);
if (ret) {
ERROR("failed to create matched ifnames");
break;
}
} else {
ERROR("failed to create matched ifnames");
break;
}
}
}
freeifaddrs(ifaddr); /* free the dynamic memory */
ifaddr = NULL; /* prevent use after free */
return ret;
}
static int config_network_link(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
struct lxc_list * it;
int ret = 0;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
if (value[strlen(value) - 1] == '+' && netdev->type == LXC_NET_PHYS) {
//get the last network list and remove it.
it = lxc_conf->network.prev;
if (((struct lxc_netdev *)(it->elem))->type != LXC_NET_PHYS) {
ERROR("lxc config cannot support string pattern matching for this link type");
return -1;
}
lxc_list_del(it);
free(it);
ret = create_matched_ifnames(value, lxc_conf);
} else {
ret = network_ifname(&netdev->link, value);
}
return ret;
}
static int config_network_name(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
return network_ifname(&netdev->name, value);
}
static int config_network_veth_pair(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
if (netdev->type != LXC_NET_VETH) {
ERROR("Invalid veth pair for a non-veth netdev");
return -1;
}
return network_ifname(&netdev->priv.veth_attr.pair, value);
}
static int config_network_macvlan_mode(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
if (netdev->type != LXC_NET_MACVLAN) {
ERROR("Invalid macvlan.mode for a non-macvlan netdev");
return -1;
}
return macvlan_mode(&netdev->priv.macvlan_attr.mode, value);
}
static int config_network_hwaddr(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
char *new_value = strdup(value);
if (!new_value) {
SYSERROR("failed to strdup '%s': %m", value);
return -1;
}
rand_complete_hwaddr(new_value);
netdev = network_netdev(key, new_value, &lxc_conf->network);
if (!netdev) {
free(new_value);
return -1;
};
if (!new_value || strlen(new_value) == 0) {
free(new_value);
netdev->hwaddr = NULL;
return 0;
}
netdev->hwaddr = new_value;
return 0;
}
static int config_network_vlan_id(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
if (netdev->type != LXC_NET_VLAN) {
ERROR("Invalid vlan.id for a non-macvlan netdev");
return -1;
}
if (get_u16(&netdev->priv.vlan_attr.vid, value, 0))
return -1;
return 0;
}
static int config_network_mtu(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
return config_string_item(&netdev->mtu, value);
}
static int config_network_ipv4(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
struct lxc_inetdev *inetdev;
struct lxc_list *list;
char *cursor, *slash, *addr = NULL, *bcast = NULL, *prefix = NULL;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
inetdev = malloc(sizeof(*inetdev));
if (!inetdev) {
SYSERROR("failed to allocate ipv4 address");
return -1;
}
memset(inetdev, 0, sizeof(*inetdev));
list = malloc(sizeof(*list));
if (!list) {
SYSERROR("failed to allocate memory");
free(inetdev);
return -1;
}
lxc_list_init(list);
list->elem = inetdev;
addr = strdup(value);
if (!addr) {
ERROR("no address specified");
free(inetdev);
free(list);
return -1;
}
cursor = strstr(addr, " ");
if (cursor) {
*cursor = '\0';
bcast = cursor + 1;
}
slash = strstr(addr, "/");
if (slash) {
*slash = '\0';
prefix = slash + 1;
}
if (!inet_pton(AF_INET, addr, &inetdev->addr)) {
SYSERROR("invalid ipv4 address: %s", value);
free(inetdev);
free(addr);
free(list);
return -1;
}
if (bcast && !inet_pton(AF_INET, bcast, &inetdev->bcast)) {
SYSERROR("invalid ipv4 broadcast address: %s", value);
free(inetdev);
free(list);
free(addr);
return -1;
}
/* no prefix specified, determine it from the network class */
if (prefix) {
if (lxc_safe_uint(prefix, &inetdev->prefix) < 0)
return -1;
} else {
inetdev->prefix = config_ip_prefix(&inetdev->addr);
}
/* if no broadcast address, let compute one from the
* prefix and address
*/
if (!bcast) {
inetdev->bcast.s_addr = inetdev->addr.s_addr;
inetdev->bcast.s_addr |=
htonl(INADDR_BROADCAST >> inetdev->prefix);
}
lxc_list_add_tail(&netdev->ipv4, list);
free(addr);
return 0;
}
static int config_network_ipv4_gateway(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
netdev = network_netdev(key, value, &lxc_conf->network);
if (!netdev)
return -1;
free(netdev->ipv4_gateway);
if (!value || strlen(value) == 0) {
netdev->ipv4_gateway = NULL;
} else if (!strcmp(value, "auto")) {
netdev->ipv4_gateway = NULL;
netdev->ipv4_gateway_auto = true;
} else {
struct in_addr *gw;
gw = malloc(sizeof(*gw));
if (!gw) {
SYSERROR("failed to allocate ipv4 gateway address");
return -1;
}
if (!inet_pton(AF_INET, value, gw)) {
SYSERROR("invalid ipv4 gateway address: %s", value);
free(gw);
return -1;
}
netdev->ipv4_gateway = gw;
netdev->ipv4_gateway_auto = false;
}
return 0;
}
static int config_network_ipv6(const char *key, const char *value,
struct lxc_conf *lxc_conf)
{
struct lxc_netdev *netdev;
struct lxc_inet6dev *inet6dev;
struct lxc_list *list;
char *slash,*valdup;
char *netmask;
netdev = network_netdev(key, value, &lxc_conf->network);