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fe8db0c5 TG |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | Copyright 2014 Tom Gundersen | |
8 | ||
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. | |
13 | ||
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. | |
18 | ||
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/>. | |
21 | ***/ | |
22 | ||
23 | #include <unistd.h> | |
24 | #include <string.h> | |
25 | #include <errno.h> | |
26 | #include <sys/inotify.h> | |
27 | #include <sys/poll.h> | |
deb2e523 | 28 | #include <net/if.h> |
fe8db0c5 TG |
29 | |
30 | #include "util.h" | |
31 | #include "macro.h" | |
32 | #include "strv.h" | |
33 | #include "fileio.h" | |
34 | #include "sd-network.h" | |
7dbf94a9 | 35 | #include "network-internal.h" |
fe8db0c5 TG |
36 | #include "dhcp-lease-internal.h" |
37 | ||
6dcaa6f5 | 38 | _public_ int sd_network_get_link_state(int ifindex, char **state) { |
deb2e523 TG |
39 | _cleanup_free_ char *s = NULL, *p = NULL; |
40 | int r; | |
41 | ||
6dcaa6f5 | 42 | assert_return(ifindex > 0, -EINVAL); |
fe8db0c5 TG |
43 | assert_return(state, -EINVAL); |
44 | ||
6dcaa6f5 | 45 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
fe8db0c5 TG |
46 | return -ENOMEM; |
47 | ||
deb2e523 | 48 | r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL); |
cb6fa44c TG |
49 | if (r == -ENOENT) |
50 | return -ENODATA; | |
51 | else if (r < 0) | |
fe8db0c5 | 52 | return r; |
cb6fa44c | 53 | else if (!s) |
fe8db0c5 TG |
54 | return -EIO; |
55 | ||
560852ce | 56 | if (streq(s, "initializing")) |
deb2e523 TG |
57 | return -EBUSY; |
58 | ||
59 | *state = s; | |
60 | s = NULL; | |
61 | ||
62 | return 0; | |
63 | } | |
64 | ||
bbf7c048 TG |
65 | _public_ int sd_network_get_operational_state(char **state) { |
66 | _cleanup_free_ char *s = NULL; | |
67 | int r; | |
68 | ||
69 | assert_return(state, -EINVAL); | |
70 | ||
85b5673b | 71 | r = parse_env_file("/run/systemd/netif/state", NEWLINE, "OPER_STATE", |
bbf7c048 TG |
72 | &s, NULL); |
73 | if (r == -ENOENT) | |
74 | return -ENODATA; | |
75 | else if (r < 0) | |
76 | return r; | |
77 | else if (!s) | |
78 | return -EIO; | |
79 | ||
80 | *state = s; | |
81 | s = NULL; | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
6dcaa6f5 | 86 | _public_ int sd_network_get_link_operational_state(int ifindex, char **state) { |
deb2e523 TG |
87 | _cleanup_free_ char *s = NULL, *p = NULL; |
88 | int r; | |
89 | ||
6dcaa6f5 | 90 | assert_return(ifindex > 0, -EINVAL); |
deb2e523 TG |
91 | assert_return(state, -EINVAL); |
92 | ||
6dcaa6f5 | 93 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
deb2e523 TG |
94 | return -ENOMEM; |
95 | ||
96 | r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL); | |
97 | if (r == -ENOENT) | |
98 | return -ENODATA; | |
99 | else if (r < 0) | |
100 | return r; | |
101 | else if (!s) | |
102 | return -EIO; | |
cb6fa44c | 103 | |
fe8db0c5 | 104 | *state = s; |
cb6fa44c TG |
105 | s = NULL; |
106 | ||
fe8db0c5 TG |
107 | return 0; |
108 | } | |
109 | ||
6dcaa6f5 | 110 | _public_ int sd_network_get_dhcp_lease(int ifindex, sd_dhcp_lease **ret) { |
81d98a39 | 111 | _cleanup_free_ char *p = NULL, *s = NULL; |
68baa8fa | 112 | sd_dhcp_lease *lease = NULL; |
fe8db0c5 TG |
113 | int r; |
114 | ||
6dcaa6f5 | 115 | assert_return(ifindex > 0, -EINVAL); |
fe8db0c5 TG |
116 | assert_return(ret, -EINVAL); |
117 | ||
6dcaa6f5 | 118 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
fe8db0c5 TG |
119 | return -ENOMEM; |
120 | ||
121 | r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL); | |
fe8db0c5 | 122 | |
81d98a39 | 123 | if (r < 0) |
fe8db0c5 | 124 | return r; |
81d98a39 | 125 | else if (!s) |
fe8db0c5 TG |
126 | return -EIO; |
127 | ||
128 | r = dhcp_lease_load(s, &lease); | |
129 | if (r < 0) | |
130 | return r; | |
131 | ||
132 | *ret = lease; | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
6dcaa6f5 | 137 | static int network_get_in_addr(const char *key, int ifindex, struct in_addr **addr) { |
7dbf94a9 TG |
138 | _cleanup_free_ char *p = NULL, *s = NULL; |
139 | int r; | |
140 | ||
6dcaa6f5 | 141 | assert_return(ifindex > 0, -EINVAL); |
7dbf94a9 | 142 | assert_return(addr, -EINVAL); |
7dbf94a9 | 143 | |
6dcaa6f5 | 144 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
7dbf94a9 TG |
145 | return -ENOMEM; |
146 | ||
bcb7a07e | 147 | r = parse_env_file(p, NEWLINE, key, &s, NULL); |
7dbf94a9 TG |
148 | if (r < 0) |
149 | return r; | |
150 | else if (!s) | |
151 | return -EIO; | |
152 | ||
a2ba62c7 | 153 | return deserialize_in_addrs(addr, s); |
7dbf94a9 TG |
154 | } |
155 | ||
6dcaa6f5 TG |
156 | _public_ int sd_network_get_dns(int ifindex, struct in_addr **addr) { |
157 | return network_get_in_addr("DNS", ifindex, addr); | |
bcb7a07e TG |
158 | } |
159 | ||
6dcaa6f5 | 160 | static int network_get_in6_addr(const char *key, int ifindex, struct in6_addr **addr) { |
7dbf94a9 TG |
161 | _cleanup_free_ char *p = NULL, *s = NULL; |
162 | int r; | |
163 | ||
6dcaa6f5 | 164 | assert_return(ifindex > 0, -EINVAL); |
7dbf94a9 | 165 | assert_return(addr, -EINVAL); |
7dbf94a9 | 166 | |
6dcaa6f5 | 167 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
7dbf94a9 TG |
168 | return -ENOMEM; |
169 | ||
bcb7a07e | 170 | r = parse_env_file(p, NEWLINE, key, &s, NULL); |
7dbf94a9 TG |
171 | if (r < 0) |
172 | return r; | |
173 | else if (!s) | |
174 | return -EIO; | |
175 | ||
a2ba62c7 | 176 | return deserialize_in6_addrs(addr, s); |
7dbf94a9 TG |
177 | } |
178 | ||
6dcaa6f5 TG |
179 | _public_ int sd_network_get_dns6(int ifindex, struct in6_addr **addr) { |
180 | return network_get_in6_addr("DNS", ifindex, addr); | |
bcb7a07e TG |
181 | } |
182 | ||
6dcaa6f5 | 183 | static int network_get_boolean(const char *key, int ifindex) { |
7dbf94a9 TG |
184 | _cleanup_free_ char *p = NULL, *s = NULL; |
185 | int r; | |
186 | ||
6dcaa6f5 | 187 | assert_return(ifindex > 0, -EINVAL); |
7dbf94a9 | 188 | |
6dcaa6f5 | 189 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
7dbf94a9 TG |
190 | return -ENOMEM; |
191 | ||
bcb7a07e | 192 | r = parse_env_file(p, NEWLINE, key, &s, NULL); |
7dbf94a9 TG |
193 | if (r < 0) |
194 | return r; | |
195 | else if (!s) | |
8b9652a7 | 196 | return false; |
7dbf94a9 TG |
197 | |
198 | return parse_boolean(s); | |
199 | } | |
200 | ||
6dcaa6f5 TG |
201 | _public_ int sd_network_dhcp_use_dns(int ifindex) { |
202 | return network_get_boolean("DHCP_USE_DNS", ifindex); | |
bcb7a07e TG |
203 | } |
204 | ||
6dcaa6f5 TG |
205 | _public_ int sd_network_dhcp_use_ntp(int ifindex) { |
206 | return network_get_boolean("DHCP_USE_NTP", ifindex); | |
bcb7a07e TG |
207 | } |
208 | ||
6dcaa6f5 | 209 | _public_ int sd_network_get_ifindices(int **ifindices) { |
fe8db0c5 TG |
210 | _cleanup_closedir_ DIR *d; |
211 | int r = 0; | |
212 | unsigned n = 0; | |
6dcaa6f5 | 213 | _cleanup_free_ int *l = NULL; |
fe8db0c5 | 214 | |
85b5673b | 215 | d = opendir("/run/systemd/netif/links/"); |
fe8db0c5 TG |
216 | if (!d) |
217 | return -errno; | |
218 | ||
219 | for (;;) { | |
220 | struct dirent *de; | |
221 | int k; | |
6dcaa6f5 | 222 | int ifindex; |
fe8db0c5 TG |
223 | |
224 | errno = 0; | |
225 | de = readdir(d); | |
226 | if (!de && errno != 0) | |
227 | return -errno; | |
228 | ||
229 | if (!de) | |
230 | break; | |
231 | ||
232 | dirent_ensure_type(d, de); | |
233 | ||
234 | if (!dirent_is_file(de)) | |
235 | continue; | |
236 | ||
6dcaa6f5 | 237 | k = safe_atoi(de->d_name, &ifindex); |
fe8db0c5 TG |
238 | if (k < 0) |
239 | continue; | |
240 | ||
6dcaa6f5 | 241 | if (ifindices) { |
fe8db0c5 | 242 | if ((unsigned) r >= n) { |
6dcaa6f5 | 243 | int *t; |
fe8db0c5 TG |
244 | |
245 | n = MAX(16, 2*r); | |
6dcaa6f5 | 246 | t = realloc(l, sizeof(int) * n); |
fe8db0c5 TG |
247 | if (!t) |
248 | return -ENOMEM; | |
249 | ||
250 | l = t; | |
251 | } | |
252 | ||
253 | assert((unsigned) r < n); | |
6dcaa6f5 | 254 | l[r++] = ifindex; |
fe8db0c5 TG |
255 | } else |
256 | r++; | |
257 | } | |
258 | ||
6dcaa6f5 TG |
259 | if (ifindices) { |
260 | *ifindices = l; | |
fe8db0c5 TG |
261 | l = NULL; |
262 | } | |
263 | ||
264 | return r; | |
265 | } | |
266 | ||
267 | static inline int MONITOR_TO_FD(sd_network_monitor *m) { | |
268 | return (int) (unsigned long) m - 1; | |
269 | } | |
270 | ||
271 | static inline sd_network_monitor* FD_TO_MONITOR(int fd) { | |
272 | return (sd_network_monitor*) (unsigned long) (fd + 1); | |
273 | } | |
274 | ||
0014a4ad | 275 | _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) { |
fe8db0c5 TG |
276 | int fd, k; |
277 | bool good = false; | |
278 | ||
279 | assert_return(m, -EINVAL); | |
280 | ||
281 | fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
282 | if (fd < 0) | |
283 | return -errno; | |
284 | ||
7e141e49 | 285 | if (!category || streq(category, "links")) { |
85b5673b | 286 | k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE); |
fe8db0c5 | 287 | if (k < 0) { |
03e334a1 | 288 | safe_close(fd); |
fe8db0c5 TG |
289 | return -errno; |
290 | } | |
291 | ||
292 | good = true; | |
293 | } | |
294 | ||
7e141e49 | 295 | if (!category || streq(category, "leases")) { |
85b5673b | 296 | k = inotify_add_watch(fd, "/run/systemd/netif/leases/", IN_MOVED_TO|IN_DELETE); |
7e141e49 TG |
297 | if (k < 0) { |
298 | safe_close(fd); | |
299 | return -errno; | |
300 | } | |
301 | ||
302 | good = true; | |
303 | } | |
304 | ||
fe8db0c5 TG |
305 | if (!good) { |
306 | close_nointr(fd); | |
307 | return -EINVAL; | |
308 | } | |
309 | ||
310 | *m = FD_TO_MONITOR(fd); | |
311 | return 0; | |
312 | } | |
313 | ||
314 | _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) { | |
315 | int fd; | |
316 | ||
317 | assert_return(m, NULL); | |
318 | ||
319 | fd = MONITOR_TO_FD(m); | |
320 | close_nointr(fd); | |
321 | ||
322 | return NULL; | |
323 | } | |
324 | ||
325 | _public_ int sd_network_monitor_flush(sd_network_monitor *m) { | |
326 | ||
327 | assert_return(m, -EINVAL); | |
328 | ||
329 | return flush_fd(MONITOR_TO_FD(m)); | |
330 | } | |
331 | ||
332 | _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) { | |
333 | ||
334 | assert_return(m, -EINVAL); | |
335 | ||
336 | return MONITOR_TO_FD(m); | |
337 | } | |
338 | ||
339 | _public_ int sd_network_monitor_get_events(sd_network_monitor *m) { | |
340 | ||
341 | assert_return(m, -EINVAL); | |
342 | ||
343 | /* For now we will only return POLLIN here, since we don't | |
344 | * need anything else ever for inotify. However, let's have | |
345 | * this API to keep our options open should we later on need | |
346 | * it. */ | |
347 | return POLLIN; | |
348 | } | |
349 | ||
350 | _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) { | |
351 | ||
352 | assert_return(m, -EINVAL); | |
353 | assert_return(timeout_usec, -EINVAL); | |
354 | ||
355 | /* For now we will only return (uint64_t) -1, since we don't | |
356 | * need any timeout. However, let's have this API to keep our | |
357 | * options open should we later on need it. */ | |
358 | *timeout_usec = (uint64_t) -1; | |
359 | return 0; | |
360 | } |