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_dhcp_lease(int ifindex, sd_dhcp_lease **ret) {
111 _cleanup_free_ char *p = NULL, *s = NULL;
112 sd_dhcp_lease *lease = NULL;
115 assert_return(ifindex > 0, -EINVAL);
116 assert_return(ret, -EINVAL);
118 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
121 r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
128 r = dhcp_lease_load(s, &lease);
137 static int network_get_strv(const char *key, int ifindex, char ***ret) {
138 _cleanup_free_ char *p = NULL, *s = NULL;
139 _cleanup_strv_free_ char **a = NULL;
142 assert_return(ifindex > 0, -EINVAL);
143 assert_return(ret, -EINVAL);
145 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
148 r = parse_env_file(p, NEWLINE, key, &s, NULL);
157 a = strv_split(s, " ");
170 _public_ int sd_network_get_dns(int ifindex, char ***ret) {
171 return network_get_strv("DNS", ifindex, ret);
174 _public_ int sd_network_get_ntp(int ifindex, char ***ret) {
175 return network_get_strv("NTP", ifindex, ret);
178 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
179 return (int) (unsigned long) m - 1;
182 static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
183 return (sd_network_monitor*) (unsigned long) (fd + 1);
186 _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) {
190 assert_return(m, -EINVAL);
192 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
196 if (!category || streq(category, "links")) {
197 k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE);
206 if (!category || streq(category, "leases")) {
207 k = inotify_add_watch(fd, "/run/systemd/netif/leases/", IN_MOVED_TO|IN_DELETE);
221 *m = FD_TO_MONITOR(fd);
225 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
228 assert_return(m, NULL);
230 fd = MONITOR_TO_FD(m);
236 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
238 assert_return(m, -EINVAL);
240 return flush_fd(MONITOR_TO_FD(m));
243 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
245 assert_return(m, -EINVAL);
247 return MONITOR_TO_FD(m);
250 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
252 assert_return(m, -EINVAL);
254 /* For now we will only return POLLIN here, since we don't
255 * need anything else ever for inotify. However, let's have
256 * this API to keep our options open should we later on need
261 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
263 assert_return(m, -EINVAL);
264 assert_return(timeout_usec, -EINVAL);
266 /* For now we will only return (uint64_t) -1, since we don't
267 * need any timeout. However, let's have this API to keep our
268 * options open should we later on need it. */
269 *timeout_usec = (uint64_t) -1;