303 lines
8.0 KiB
C
303 lines
8.0 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2011 Lennart Poettering
|
|
Copyright 2014 Tom Gundersen
|
|
|
|
systemd 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.
|
|
|
|
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <sys/inotify.h>
|
|
#include <sys/poll.h>
|
|
#include <net/if.h>
|
|
|
|
#include "util.h"
|
|
#include "macro.h"
|
|
#include "strv.h"
|
|
#include "fileio.h"
|
|
#include "sd-network.h"
|
|
#include "network-internal.h"
|
|
#include "dhcp-lease-internal.h"
|
|
|
|
_public_ int sd_network_get_link_state(int ifindex, char **state) {
|
|
_cleanup_free_ char *s = NULL, *p = NULL;
|
|
int r;
|
|
|
|
assert_return(ifindex > 0, -EINVAL);
|
|
assert_return(state, -EINVAL);
|
|
|
|
if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
|
|
return -ENOMEM;
|
|
|
|
r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL);
|
|
if (r == -ENOENT)
|
|
return -ENODATA;
|
|
else if (r < 0)
|
|
return r;
|
|
else if (!s)
|
|
return -EIO;
|
|
|
|
if (streq(s, "initializing"))
|
|
return -EBUSY;
|
|
|
|
*state = s;
|
|
s = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_network_get_operational_state(char **state) {
|
|
_cleanup_free_ char *s = NULL;
|
|
int r;
|
|
|
|
assert_return(state, -EINVAL);
|
|
|
|
r = parse_env_file("/run/systemd/netif/state", NEWLINE, "OPER_STATE",
|
|
&s, NULL);
|
|
if (r == -ENOENT)
|
|
return -ENODATA;
|
|
else if (r < 0)
|
|
return r;
|
|
else if (!s)
|
|
return -EIO;
|
|
|
|
*state = s;
|
|
s = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_network_get_link_operational_state(int ifindex, char **state) {
|
|
_cleanup_free_ char *s = NULL, *p = NULL;
|
|
int r;
|
|
|
|
assert_return(ifindex > 0, -EINVAL);
|
|
assert_return(state, -EINVAL);
|
|
|
|
if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
|
|
return -ENOMEM;
|
|
|
|
r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL);
|
|
if (r == -ENOENT)
|
|
return -ENODATA;
|
|
else if (r < 0)
|
|
return r;
|
|
else if (!s)
|
|
return -EIO;
|
|
|
|
*state = s;
|
|
s = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_network_get_dhcp_lease(int ifindex, sd_dhcp_lease **ret) {
|
|
_cleanup_free_ char *p = NULL, *s = NULL;
|
|
sd_dhcp_lease *lease = NULL;
|
|
int r;
|
|
|
|
assert_return(ifindex > 0, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
|
|
if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
|
|
return -ENOMEM;
|
|
|
|
r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
else if (!s)
|
|
return -EIO;
|
|
|
|
r = dhcp_lease_load(s, &lease);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
*ret = lease;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int network_get_in_addr(const char *key, int ifindex, struct in_addr **addr) {
|
|
_cleanup_free_ char *p = NULL, *s = NULL;
|
|
int r;
|
|
|
|
assert_return(ifindex > 0, -EINVAL);
|
|
assert_return(addr, -EINVAL);
|
|
|
|
if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
|
|
return -ENOMEM;
|
|
|
|
r = parse_env_file(p, NEWLINE, key, &s, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
else if (!s)
|
|
return -EIO;
|
|
|
|
return deserialize_in_addrs(addr, s);
|
|
}
|
|
|
|
_public_ int sd_network_get_dns(int ifindex, struct in_addr **addr) {
|
|
return network_get_in_addr("DNS", ifindex, addr);
|
|
}
|
|
|
|
static int network_get_in6_addr(const char *key, int ifindex, struct in6_addr **addr) {
|
|
_cleanup_free_ char *p = NULL, *s = NULL;
|
|
int r;
|
|
|
|
assert_return(ifindex > 0, -EINVAL);
|
|
assert_return(addr, -EINVAL);
|
|
|
|
if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
|
|
return -ENOMEM;
|
|
|
|
r = parse_env_file(p, NEWLINE, key, &s, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
else if (!s)
|
|
return -EIO;
|
|
|
|
return deserialize_in6_addrs(addr, s);
|
|
}
|
|
|
|
_public_ int sd_network_get_dns6(int ifindex, struct in6_addr **addr) {
|
|
return network_get_in6_addr("DNS", ifindex, addr);
|
|
}
|
|
|
|
static int network_get_boolean(const char *key, int ifindex) {
|
|
_cleanup_free_ char *p = NULL, *s = NULL;
|
|
int r;
|
|
|
|
assert_return(ifindex > 0, -EINVAL);
|
|
|
|
if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
|
|
return -ENOMEM;
|
|
|
|
r = parse_env_file(p, NEWLINE, key, &s, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
else if (!s)
|
|
return false;
|
|
|
|
return parse_boolean(s);
|
|
}
|
|
|
|
_public_ int sd_network_dhcp_use_dns(int ifindex) {
|
|
return network_get_boolean("DHCP_USE_DNS", ifindex);
|
|
}
|
|
|
|
_public_ int sd_network_dhcp_use_ntp(int ifindex) {
|
|
return network_get_boolean("DHCP_USE_NTP", ifindex);
|
|
}
|
|
|
|
static inline int MONITOR_TO_FD(sd_network_monitor *m) {
|
|
return (int) (unsigned long) m - 1;
|
|
}
|
|
|
|
static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
|
|
return (sd_network_monitor*) (unsigned long) (fd + 1);
|
|
}
|
|
|
|
_public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) {
|
|
int fd, k;
|
|
bool good = false;
|
|
|
|
assert_return(m, -EINVAL);
|
|
|
|
fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
|
|
if (fd < 0)
|
|
return -errno;
|
|
|
|
if (!category || streq(category, "links")) {
|
|
k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE);
|
|
if (k < 0) {
|
|
safe_close(fd);
|
|
return -errno;
|
|
}
|
|
|
|
good = true;
|
|
}
|
|
|
|
if (!category || streq(category, "leases")) {
|
|
k = inotify_add_watch(fd, "/run/systemd/netif/leases/", IN_MOVED_TO|IN_DELETE);
|
|
if (k < 0) {
|
|
safe_close(fd);
|
|
return -errno;
|
|
}
|
|
|
|
good = true;
|
|
}
|
|
|
|
if (!good) {
|
|
close_nointr(fd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
*m = FD_TO_MONITOR(fd);
|
|
return 0;
|
|
}
|
|
|
|
_public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
|
|
int fd;
|
|
|
|
assert_return(m, NULL);
|
|
|
|
fd = MONITOR_TO_FD(m);
|
|
close_nointr(fd);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
_public_ int sd_network_monitor_flush(sd_network_monitor *m) {
|
|
|
|
assert_return(m, -EINVAL);
|
|
|
|
return flush_fd(MONITOR_TO_FD(m));
|
|
}
|
|
|
|
_public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
|
|
|
|
assert_return(m, -EINVAL);
|
|
|
|
return MONITOR_TO_FD(m);
|
|
}
|
|
|
|
_public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
|
|
|
|
assert_return(m, -EINVAL);
|
|
|
|
/* For now we will only return POLLIN here, since we don't
|
|
* need anything else ever for inotify. However, let's have
|
|
* this API to keep our options open should we later on need
|
|
* it. */
|
|
return POLLIN;
|
|
}
|
|
|
|
_public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(timeout_usec, -EINVAL);
|
|
|
|
/* For now we will only return (uint64_t) -1, since we don't
|
|
* need any timeout. However, let's have this API to keep our
|
|
* options open should we later on need it. */
|
|
*timeout_usec = (uint64_t) -1;
|
|
return 0;
|
|
}
|