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_link_operational_state(unsigned index, char **state) {
99 _cleanup_free_ char *s = NULL, *p = NULL;
102 assert_return(index, -EINVAL);
103 assert_return(state, -EINVAL);
105 if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
108 r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL);
122 _public_ int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret) {
123 sd_dhcp_lease *lease;
127 assert_return(index, -EINVAL);
128 assert_return(ret, -EINVAL);
130 if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
133 r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
142 r = dhcp_lease_load(s, &lease);
151 _public_ int sd_network_get_ifindices(unsigned **indices) {
152 _cleanup_closedir_ DIR *d;
155 _cleanup_free_ uid_t *l = NULL;
157 d = opendir("/run/systemd/network/links/");
168 if (!de && errno != 0)
174 dirent_ensure_type(d, de);
176 if (!dirent_is_file(de))
179 k = safe_atou(de->d_name, &index);
184 if ((unsigned) r >= n) {
188 t = realloc(l, sizeof(unsigned) * n);
195 assert((unsigned) r < n);
209 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
210 return (int) (unsigned long) m - 1;
213 static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
214 return (sd_network_monitor*) (unsigned long) (fd + 1);
217 _public_ int sd_network_monitor_new(const char *category, sd_network_monitor **m) {
221 assert_return(m, -EINVAL);
223 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
227 if (!category || streq(category, "links")) {
228 k = inotify_add_watch(fd, "/run/systemd/network/links/", IN_MOVED_TO|IN_DELETE);
237 if (!category || streq(category, "leases")) {
238 k = inotify_add_watch(fd, "/run/systemd/network/leases/", IN_MOVED_TO|IN_DELETE);
252 *m = FD_TO_MONITOR(fd);
256 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
259 assert_return(m, NULL);
261 fd = MONITOR_TO_FD(m);
267 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
269 assert_return(m, -EINVAL);
271 return flush_fd(MONITOR_TO_FD(m));
274 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
276 assert_return(m, -EINVAL);
278 return MONITOR_TO_FD(m);
281 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
283 assert_return(m, -EINVAL);
285 /* For now we will only return POLLIN here, since we don't
286 * need anything else ever for inotify. However, let's have
287 * this API to keep our options open should we later on need
292 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
294 assert_return(m, -EINVAL);
295 assert_return(timeout_usec, -EINVAL);
297 /* For now we will only return (uint64_t) -1, since we don't
298 * need any timeout. However, let's have this API to keep our
299 * options open should we later on need it. */
300 *timeout_usec = (uint64_t) -1;