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 "network-internal.h"
37 _public_ int sd_network_get_operational_state(char **state) {
38 _cleanup_free_ char *s = NULL;
41 assert_return(state, -EINVAL);
43 r = parse_env_file("/run/systemd/netif/state", NEWLINE, "OPER_STATE", &s, NULL);
57 static int network_get_strv(const char *key, char ***ret) {
58 _cleanup_strv_free_ char **a = NULL;
59 _cleanup_free_ char *s = NULL;
62 assert_return(ret, -EINVAL);
64 r = parse_env_file("/run/systemd/netif/state", NEWLINE, key, &s, NULL);
74 a = strv_split(s, " ");
87 _public_ int sd_network_get_dns(char ***ret) {
88 return network_get_strv("DNS", ret);
91 _public_ int sd_network_get_ntp(char ***ret) {
92 return network_get_strv("NTP", ret);
95 _public_ int sd_network_link_get_state(int ifindex, char **state) {
96 _cleanup_free_ char *s = NULL, *p = NULL;
99 assert_return(ifindex > 0, -EINVAL);
100 assert_return(state, -EINVAL);
102 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
105 r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL);
119 _public_ int sd_network_link_get_operational_state(int ifindex, char **state) {
120 _cleanup_free_ char *s = NULL, *p = NULL;
123 assert_return(ifindex > 0, -EINVAL);
124 assert_return(state, -EINVAL);
126 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
129 r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL);
143 _public_ int sd_network_link_get_llmnr(int ifindex, char **llmnr) {
144 _cleanup_free_ char *s = NULL, *p = NULL;
147 assert_return(ifindex > 0, -EINVAL);
148 assert_return(llmnr, -EINVAL);
150 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
153 r = parse_env_file(p, NEWLINE, "LLMNR", &s, NULL);
167 static int network_get_link_strv(const char *key, int ifindex, char ***ret) {
168 _cleanup_free_ char *p = NULL, *s = NULL;
169 _cleanup_strv_free_ char **a = NULL;
172 assert_return(ifindex > 0, -EINVAL);
173 assert_return(ret, -EINVAL);
175 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
178 r = parse_env_file(p, NEWLINE, key, &s, NULL);
188 a = strv_split(s, " ");
201 _public_ int sd_network_link_get_dns(int ifindex, char ***ret) {
202 return network_get_link_strv("DNS", ifindex, ret);
205 _public_ int sd_network_link_get_ntp(int ifindex, char ***ret) {
206 return network_get_link_strv("NTP", ifindex, ret);
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(sd_network_monitor **m, const char *category) {
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/netif/links/", IN_MOVED_TO|IN_DELETE);
242 *m = FD_TO_MONITOR(fd);
246 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
249 assert_return(m, NULL);
251 fd = MONITOR_TO_FD(m);
257 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
259 assert_return(m, -EINVAL);
261 return flush_fd(MONITOR_TO_FD(m));
264 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
266 assert_return(m, -EINVAL);
268 return MONITOR_TO_FD(m);
271 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
273 assert_return(m, -EINVAL);
275 /* For now we will only return POLLIN here, since we don't
276 * need anything else ever for inotify. However, let's have
277 * this API to keep our options open should we later on need
282 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
284 assert_return(m, -EINVAL);
285 assert_return(timeout_usec, -EINVAL);
287 /* For now we will only return (uint64_t) -1, since we don't
288 * need any timeout. However, let's have this API to keep our
289 * options open should we later on need it. */
290 *timeout_usec = (uint64_t) -1;