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 static int link_get_flags(unsigned index, unsigned *flags) {
39 _cleanup_free_ char *s = NULL, *p = NULL;
45 if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
48 r = parse_env_file(p, NEWLINE, "FLAGS", &s, NULL);
56 return safe_atou(s, flags);
59 _public_ int sd_network_link_is_loopback(unsigned index) {
63 r = link_get_flags(index, &flags);
67 return flags & IFF_LOOPBACK;
70 _public_ int sd_network_get_link_state(unsigned index, char **state) {
71 _cleanup_free_ char *s = NULL, *p = NULL;
74 assert_return(index, -EINVAL);
75 assert_return(state, -EINVAL);
77 if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
80 r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL);
88 if (streq(s, "unmanaged"))
90 else if (streq(s, "initializing"))
99 _public_ int sd_network_get_operational_state(char **state) {
100 _cleanup_free_ char *s = NULL;
103 assert_return(state, -EINVAL);
105 r = parse_env_file("/run/systemd/netif/state", NEWLINE, "OPER_STATE",
120 _public_ int sd_network_get_link_operational_state(unsigned index, char **state) {
121 _cleanup_free_ char *s = NULL, *p = NULL;
124 assert_return(index, -EINVAL);
125 assert_return(state, -EINVAL);
127 if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
130 r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL);
144 _public_ int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret) {
145 _cleanup_free_ char *p = NULL, *s = NULL;
146 sd_dhcp_lease *lease = NULL;
149 assert_return(index, -EINVAL);
150 assert_return(ret, -EINVAL);
152 if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
155 r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
162 r = dhcp_lease_load(s, &lease);
171 static int network_get_in_addr(const char *key, unsigned index, struct in_addr **addr) {
172 _cleanup_free_ char *p = NULL, *s = NULL;
175 assert_return(index, -EINVAL);
176 assert_return(addr, -EINVAL);
178 if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
181 r = parse_env_file(p, NEWLINE, key, &s, NULL);
187 return deserialize_in_addrs(addr, s);
190 _public_ int sd_network_get_dns(unsigned index, struct in_addr **addr) {
191 return network_get_in_addr("DNS", index, addr);
194 _public_ int sd_network_get_ntp(unsigned index, struct in_addr **addr) {
195 return network_get_in_addr("NTP", index, addr);
198 static int network_get_in6_addr(const char *key, unsigned index, struct in6_addr **addr) {
199 _cleanup_free_ char *p = NULL, *s = NULL;
202 assert_return(index, -EINVAL);
203 assert_return(addr, -EINVAL);
205 if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
208 r = parse_env_file(p, NEWLINE, key, &s, NULL);
214 return deserialize_in6_addrs(addr, s);
217 _public_ int sd_network_get_dns6(unsigned index, struct in6_addr **addr) {
218 return network_get_in6_addr("DNS", index, addr);
221 _public_ int sd_network_get_ntp6(unsigned index, struct in6_addr **addr) {
222 return network_get_in6_addr("NTP", index, addr);
225 static int network_get_boolean(const char *key, unsigned index) {
226 _cleanup_free_ char *p = NULL, *s = NULL;
229 assert_return(index, -EINVAL);
231 if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
234 r = parse_env_file(p, NEWLINE, key, &s, NULL);
240 return parse_boolean(s);
243 _public_ int sd_network_dhcp_use_dns(unsigned index) {
244 return network_get_boolean("DHCP_USE_DNS", index);
247 _public_ int sd_network_dhcp_use_ntp(unsigned index) {
248 return network_get_boolean("DHCP_USE_NTP", index);
251 _public_ int sd_network_get_ifindices(unsigned **indices) {
252 _cleanup_closedir_ DIR *d;
255 _cleanup_free_ uid_t *l = NULL;
257 d = opendir("/run/systemd/netif/links/");
268 if (!de && errno != 0)
274 dirent_ensure_type(d, de);
276 if (!dirent_is_file(de))
279 k = safe_atou(de->d_name, &index);
284 if ((unsigned) r >= n) {
288 t = realloc(l, sizeof(unsigned) * n);
295 assert((unsigned) r < n);
309 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
310 return (int) (unsigned long) m - 1;
313 static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
314 return (sd_network_monitor*) (unsigned long) (fd + 1);
317 _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) {
321 assert_return(m, -EINVAL);
323 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
327 if (!category || streq(category, "links")) {
328 k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE);
337 if (!category || streq(category, "leases")) {
338 k = inotify_add_watch(fd, "/run/systemd/netif/leases/", IN_MOVED_TO|IN_DELETE);
352 *m = FD_TO_MONITOR(fd);
356 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
359 assert_return(m, NULL);
361 fd = MONITOR_TO_FD(m);
367 _public_ int sd_network_monitor_flush(sd_network_monitor *m) {
369 assert_return(m, -EINVAL);
371 return flush_fd(MONITOR_TO_FD(m));
374 _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
376 assert_return(m, -EINVAL);
378 return MONITOR_TO_FD(m);
381 _public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
383 assert_return(m, -EINVAL);
385 /* For now we will only return POLLIN here, since we don't
386 * need anything else ever for inotify. However, let's have
387 * this API to keep our options open should we later on need
392 _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
394 assert_return(m, -EINVAL);
395 assert_return(timeout_usec, -EINVAL);
397 /* For now we will only return (uint64_t) -1, since we don't
398 * need any timeout. However, let's have this API to keep our
399 * options open should we later on need it. */
400 *timeout_usec = (uint64_t) -1;