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"
36 #include "dhcp-lease-internal.h"
38 _public_ int sd_network_get_link_state(int ifindex, char **state) {
39 _cleanup_free_ char *s = NULL, *p = NULL;
42 assert_return(ifindex > 0, -EINVAL);
43 assert_return(state, -EINVAL);
45 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
48 r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL);
56 if (streq(s, "initializing"))
65 _public_ int sd_network_get_operational_state(char **state) {
66 _cleanup_free_ char *s = NULL;
69 assert_return(state, -EINVAL);
71 r = parse_env_file("/run/systemd/netif/state", NEWLINE, "OPER_STATE",
86 _public_ int sd_network_get_link_operational_state(int ifindex, char **state) {
87 _cleanup_free_ char *s = NULL, *p = NULL;
90 assert_return(ifindex > 0, -EINVAL);
91 assert_return(state, -EINVAL);
93 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
96 r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL);
110 _public_ int sd_network_get_llmnr(int ifindex, char **llmnr) {
111 _cleanup_free_ char *s = NULL, *p = NULL;
114 assert_return(ifindex > 0, -EINVAL);
115 assert_return(llmnr, -EINVAL);
117 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
120 r = parse_env_file(p, NEWLINE, "LLMNR", &s, NULL);
134 _public_ int sd_network_get_dhcp_lease(int ifindex, sd_dhcp_lease **ret) {
135 _cleanup_free_ char *p = NULL, *s = NULL;
136 sd_dhcp_lease *lease = NULL;
139 assert_return(ifindex > 0, -EINVAL);
140 assert_return(ret, -EINVAL);
142 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
145 r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
152 r = dhcp_lease_load(s, &lease);
161 static int network_get_strv(const char *key, int ifindex, char ***ret) {
162 _cleanup_free_ char *p = NULL, *s = NULL;
163 _cleanup_strv_free_ char **a = NULL;
166 assert_return(ifindex > 0, -EINVAL);
167 assert_return(ret, -EINVAL);
169 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
172 r = parse_env_file(p, NEWLINE, key, &s, NULL);
181 a = strv_split(s, " ");
194 _public_ int sd_network_get_dns(int ifindex, char ***ret) {
195 return network_get_strv("DNS", ifindex, ret);
198 _public_ int sd_network_get_ntp(int ifindex, char ***ret) {
199 return network_get_strv("NTP", ifindex, ret);
202 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
203 return (int) (unsigned long) m - 1;
206 static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
207 return (sd_network_monitor*) (unsigned long) (fd + 1);
210 _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) {
214 assert_return(m, -EINVAL);
216 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
220 if (!category || streq(category, "links")) {
221 k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE);
230 if (!category || streq(category, "leases")) {
231 k = inotify_add_watch(fd, "/run/systemd/netif/leases/", IN_MOVED_TO|IN_DELETE);
245 *m = FD_TO_MONITOR(fd);
249 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
252 assert_return(m, NULL);
254 fd = MONITOR_TO_FD(m);
260 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
262 assert_return(m, -EINVAL);
264 return flush_fd(MONITOR_TO_FD(m));
267 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
269 assert_return(m, -EINVAL);
271 return MONITOR_TO_FD(m);
274 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
276 assert_return(m, -EINVAL);
278 /* For now we will only return POLLIN here, since we don't
279 * need anything else ever for inotify. However, let's have
280 * this API to keep our options open should we later on need
285 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
287 assert_return(m, -EINVAL);
288 assert_return(timeout_usec, -EINVAL);
290 /* For now we will only return (uint64_t) -1, since we don't
291 * need any timeout. However, let's have this API to keep our
292 * options open should we later on need it. */
293 *timeout_usec = (uint64_t) -1;