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>
34 #include "sd-network.h"
35 #include "dhcp-lease-internal.h"
37 static int link_get_flags(unsigned index, unsigned *flags) {
38 _cleanup_free_ char *s = NULL, *p = NULL;
44 if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
47 r = parse_env_file(p, NEWLINE, "FLAGS", &s, NULL);
55 return safe_atou(s, flags);
58 _public_ int sd_network_link_is_loopback(unsigned index) {
62 r = link_get_flags(index, &flags);
66 return flags & IFF_LOOPBACK;
69 _public_ int sd_network_get_link_state(unsigned index, char **state) {
70 _cleanup_free_ char *s = NULL, *p = NULL;
73 assert_return(index, -EINVAL);
74 assert_return(state, -EINVAL);
76 if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
79 r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL);
87 if (streq(s, "unmanaged"))
89 else if (streq(s, "initializing"))
98 _public_ int sd_network_get_operational_state(char **state) {
99 _cleanup_free_ char *s = NULL;
102 assert_return(state, -EINVAL);
104 r = parse_env_file("/run/systemd/network/state", NEWLINE, "OPER_STATE",
119 _public_ int sd_network_get_link_operational_state(unsigned index, char **state) {
120 _cleanup_free_ char *s = NULL, *p = NULL;
123 assert_return(index, -EINVAL);
124 assert_return(state, -EINVAL);
126 if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
129 r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL);
143 _public_ int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret) {
144 sd_dhcp_lease *lease;
148 assert_return(index, -EINVAL);
149 assert_return(ret, -EINVAL);
151 if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
154 r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
163 r = dhcp_lease_load(s, &lease);
172 _public_ int sd_network_get_ifindices(unsigned **indices) {
173 _cleanup_closedir_ DIR *d;
176 _cleanup_free_ uid_t *l = NULL;
178 d = opendir("/run/systemd/network/links/");
189 if (!de && errno != 0)
195 dirent_ensure_type(d, de);
197 if (!dirent_is_file(de))
200 k = safe_atou(de->d_name, &index);
205 if ((unsigned) r >= n) {
209 t = realloc(l, sizeof(unsigned) * n);
216 assert((unsigned) r < n);
230 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
231 return (int) (unsigned long) m - 1;
234 static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
235 return (sd_network_monitor*) (unsigned long) (fd + 1);
238 _public_ int sd_network_monitor_new(const char *category, sd_network_monitor **m) {
242 assert_return(m, -EINVAL);
244 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
248 if (!category || streq(category, "links")) {
249 k = inotify_add_watch(fd, "/run/systemd/network/links/", IN_MOVED_TO|IN_DELETE);
258 if (!category || streq(category, "leases")) {
259 k = inotify_add_watch(fd, "/run/systemd/network/leases/", IN_MOVED_TO|IN_DELETE);
273 *m = FD_TO_MONITOR(fd);
277 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
280 assert_return(m, NULL);
282 fd = MONITOR_TO_FD(m);
288 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
290 assert_return(m, -EINVAL);
292 return flush_fd(MONITOR_TO_FD(m));
295 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
297 assert_return(m, -EINVAL);
299 return MONITOR_TO_FD(m);
302 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
304 assert_return(m, -EINVAL);
306 /* For now we will only return POLLIN here, since we don't
307 * need anything else ever for inotify. However, let's have
308 * this API to keep our options open should we later on need
313 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
315 assert_return(m, -EINVAL);
316 assert_return(timeout_usec, -EINVAL);
318 /* For now we will only return (uint64_t) -1, since we don't
319 * need any timeout. However, let's have this API to keep our
320 * options open should we later on need it. */
321 *timeout_usec = (uint64_t) -1;