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);
132 _public_ int sd_network_get_dhcp_lease(int ifindex, sd_dhcp_lease **ret) {
133 _cleanup_free_ char *p = NULL, *s = NULL;
134 sd_dhcp_lease *lease = NULL;
137 assert_return(ifindex > 0, -EINVAL);
138 assert_return(ret, -EINVAL);
140 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
143 r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
150 r = dhcp_lease_load(s, &lease);
159 static int network_get_strv(const char *key, int ifindex, char ***ret) {
160 _cleanup_free_ char *p = NULL, *s = NULL;
161 _cleanup_strv_free_ char **a = NULL;
164 assert_return(ifindex > 0, -EINVAL);
165 assert_return(ret, -EINVAL);
167 if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
170 r = parse_env_file(p, NEWLINE, key, &s, NULL);
179 a = strv_split(s, " ");
192 _public_ int sd_network_get_dns(int ifindex, char ***ret) {
193 return network_get_strv("DNS", ifindex, ret);
196 _public_ int sd_network_get_ntp(int ifindex, char ***ret) {
197 return network_get_strv("NTP", ifindex, ret);
200 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
201 return (int) (unsigned long) m - 1;
204 static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
205 return (sd_network_monitor*) (unsigned long) (fd + 1);
208 _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) {
212 assert_return(m, -EINVAL);
214 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
218 if (!category || streq(category, "links")) {
219 k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE);
228 if (!category || streq(category, "leases")) {
229 k = inotify_add_watch(fd, "/run/systemd/netif/leases/", IN_MOVED_TO|IN_DELETE);
243 *m = FD_TO_MONITOR(fd);
247 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
250 assert_return(m, NULL);
252 fd = MONITOR_TO_FD(m);
258 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
260 assert_return(m, -EINVAL);
262 return flush_fd(MONITOR_TO_FD(m));
265 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
267 assert_return(m, -EINVAL);
269 return MONITOR_TO_FD(m);
272 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
274 assert_return(m, -EINVAL);
276 /* For now we will only return POLLIN here, since we don't
277 * need anything else ever for inotify. However, let's have
278 * this API to keep our options open should we later on need
283 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
285 assert_return(m, -EINVAL);
286 assert_return(timeout_usec, -EINVAL);
288 /* For now we will only return (uint64_t) -1, since we don't
289 * need any timeout. However, let's have this API to keep our
290 * options open should we later on need it. */
291 *timeout_usec = (uint64_t) -1;