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_get_link_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);
112 if (streq(s, "initializing"))
121 _public_ int sd_network_get_link_operational_state(int ifindex, char **state) {
122 _cleanup_free_ char *s = NULL, *p = NULL;
125 assert_return(ifindex > 0, -EINVAL);
126 assert_return(state, -EINVAL);
128 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
131 r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL);
145 _public_ int sd_network_get_link_llmnr(int ifindex, char **llmnr) {
146 _cleanup_free_ char *s = NULL, *p = NULL;
149 assert_return(ifindex > 0, -EINVAL);
150 assert_return(llmnr, -EINVAL);
152 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
155 r = parse_env_file(p, NEWLINE, "LLMNR", &s, NULL);
169 static int network_get_link_strv(const char *key, int ifindex, char ***ret) {
170 _cleanup_free_ char *p = NULL, *s = NULL;
171 _cleanup_strv_free_ char **a = NULL;
174 assert_return(ifindex > 0, -EINVAL);
175 assert_return(ret, -EINVAL);
177 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
180 r = parse_env_file(p, NEWLINE, key, &s, NULL);
190 a = strv_split(s, " ");
203 _public_ int sd_network_get_link_dns(int ifindex, char ***ret) {
204 return network_get_link_strv("DNS", ifindex, ret);
207 _public_ int sd_network_get_link_ntp(int ifindex, char ***ret) {
208 return network_get_link_strv("NTP", ifindex, ret);
211 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
212 return (int) (unsigned long) m - 1;
215 static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
216 return (sd_network_monitor*) (unsigned long) (fd + 1);
219 _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) {
223 assert_return(m, -EINVAL);
225 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
229 if (!category || streq(category, "links")) {
230 k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE);
244 *m = FD_TO_MONITOR(fd);
248 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
251 assert_return(m, NULL);
253 fd = MONITOR_TO_FD(m);
259 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
261 assert_return(m, -EINVAL);
263 return flush_fd(MONITOR_TO_FD(m));
266 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
268 assert_return(m, -EINVAL);
270 return MONITOR_TO_FD(m);
273 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
275 assert_return(m, -EINVAL);
277 /* For now we will only return POLLIN here, since we don't
278 * need anything else ever for inotify. However, let's have
279 * this API to keep our options open should we later on need
284 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
286 assert_return(m, -EINVAL);
287 assert_return(timeout_usec, -EINVAL);
289 /* For now we will only return (uint64_t) -1, since we don't
290 * need any timeout. However, let's have this API to keep our
291 * options open should we later on need it. */
292 *timeout_usec = (uint64_t) -1;