1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
7 Copyright 2014 Tom Gundersen
9 systemd is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 systemd is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/inotify.h>
33 #include "sd-network.h"
34 #include "dhcp-lease-internal.h"
36 _public_ int sd_network_get_link_state(unsigned index, char **state) {
40 assert_return(index, -EINVAL);
41 assert_return(state, -EINVAL);
43 if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
46 r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
51 s = strdup("unknown");
67 _public_ int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret) {
72 assert_return(index, -EINVAL);
73 assert_return(ret, -EINVAL);
75 if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
78 r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
87 r = dhcp_lease_load(s, &lease);
96 _public_ int sd_network_get_ifindices(unsigned **indices) {
97 _cleanup_closedir_ DIR *d;
100 _cleanup_free_ uid_t *l = NULL;
102 d = opendir("/run/systemd/network/links/");
113 if (!de && errno != 0)
119 dirent_ensure_type(d, de);
121 if (!dirent_is_file(de))
124 k = safe_atou(de->d_name, &index);
129 if ((unsigned) r >= n) {
133 t = realloc(l, sizeof(unsigned) * n);
140 assert((unsigned) r < n);
154 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
155 return (int) (unsigned long) m - 1;
158 static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
159 return (sd_network_monitor*) (unsigned long) (fd + 1);
162 _public_ int sd_network_monitor_new(const char *category, sd_network_monitor **m) {
166 assert_return(m, -EINVAL);
168 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
172 if (!category || streq(category, "netif")) {
173 k = inotify_add_watch(fd, "/run/systemd/network/links/", IN_MOVED_TO|IN_DELETE);
175 close_nointr_nofail(fd);
187 *m = FD_TO_MONITOR(fd);
191 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
194 assert_return(m, NULL);
196 fd = MONITOR_TO_FD(m);
202 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
204 assert_return(m, -EINVAL);
206 return flush_fd(MONITOR_TO_FD(m));
209 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
211 assert_return(m, -EINVAL);
213 return MONITOR_TO_FD(m);
216 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
218 assert_return(m, -EINVAL);
220 /* For now we will only return POLLIN here, since we don't
221 * need anything else ever for inotify. However, let's have
222 * this API to keep our options open should we later on need
227 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
229 assert_return(m, -EINVAL);
230 assert_return(timeout_usec, -EINVAL);
232 /* For now we will only return (uint64_t) -1, since we don't
233 * need any timeout. However, let's have this API to keep our
234 * options open should we later on need it. */
235 *timeout_usec = (uint64_t) -1;