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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
fe8db0c5 | 2 | |
fe8db0c5 | 3 | #include <errno.h> |
0a6f50c0 | 4 | #include <poll.h> |
07630cea | 5 | #include <sys/inotify.h> |
fe8db0c5 | 6 | |
07630cea LP |
7 | #include "sd-network.h" |
8 | ||
b5efdb8a | 9 | #include "alloc-util.h" |
686d13b9 | 10 | #include "env-file.h" |
77601719 | 11 | #include "fd-util.h" |
77601719 | 12 | #include "fs-util.h" |
9e5fd717 | 13 | #include "inotify-util.h" |
fe8db0c5 | 14 | #include "macro.h" |
77601719 | 15 | #include "parse-util.h" |
5f02f341 | 16 | #include "stdio-util.h" |
07630cea | 17 | #include "string-util.h" |
fe8db0c5 | 18 | #include "strv.h" |
fe8db0c5 | 19 | |
ac999bf0 | 20 | static int network_get_string(const char *field, char **ret) { |
03cc0fd1 | 21 | _cleanup_free_ char *s = NULL; |
deb2e523 TG |
22 | int r; |
23 | ||
ac999bf0 | 24 | assert_return(ret, -EINVAL); |
fe8db0c5 | 25 | |
ac999bf0 | 26 | r = parse_env_file(NULL, "/run/systemd/netif/state", field, &s); |
03cc0fd1 | 27 | if (r < 0) |
fe8db0c5 | 28 | return r; |
03cc0fd1 LP |
29 | if (isempty(s)) |
30 | return -ENODATA; | |
deb2e523 | 31 | |
ac999bf0 | 32 | *ret = TAKE_PTR(s); |
deb2e523 TG |
33 | return 0; |
34 | } | |
35 | ||
e7c1b3f7 YW |
36 | int sd_network_get_operational_state(char **ret) { |
37 | return network_get_string("OPER_STATE", ret); | |
ac999bf0 YW |
38 | } |
39 | ||
e7c1b3f7 YW |
40 | int sd_network_get_carrier_state(char **ret) { |
41 | return network_get_string("CARRIER_STATE", ret); | |
ac999bf0 YW |
42 | } |
43 | ||
e7c1b3f7 YW |
44 | int sd_network_get_address_state(char **ret) { |
45 | return network_get_string("ADDRESS_STATE", ret); | |
ac999bf0 YW |
46 | } |
47 | ||
e7c1b3f7 YW |
48 | int sd_network_get_ipv4_address_state(char **ret) { |
49 | return network_get_string("IPV4_ADDRESS_STATE", ret); | |
bbea8813 L |
50 | } |
51 | ||
e7c1b3f7 YW |
52 | int sd_network_get_ipv6_address_state(char **ret) { |
53 | return network_get_string("IPV6_ADDRESS_STATE", ret); | |
bbea8813 L |
54 | } |
55 | ||
e7c1b3f7 YW |
56 | int sd_network_get_online_state(char **ret) { |
57 | return network_get_string("ONLINE_STATE", ret); | |
bcdcc596 AŠ |
58 | } |
59 | ||
03cc0fd1 LP |
60 | static int network_get_strv(const char *key, char ***ret) { |
61 | _cleanup_strv_free_ char **a = NULL; | |
bbf7c048 TG |
62 | _cleanup_free_ char *s = NULL; |
63 | int r; | |
64 | ||
03cc0fd1 LP |
65 | assert_return(ret, -EINVAL); |
66 | ||
13df9c39 | 67 | r = parse_env_file(NULL, "/run/systemd/netif/state", key, &s); |
03cc0fd1 LP |
68 | if (r < 0) |
69 | return r; | |
e05dd771 YW |
70 | if (isempty(s)) |
71 | return -ENODATA; | |
03cc0fd1 | 72 | |
27b13df4 | 73 | a = strv_split(s, NULL); |
03cc0fd1 LP |
74 | if (!a) |
75 | return -ENOMEM; | |
76 | ||
77 | strv_uniq(a); | |
da6053d0 | 78 | r = (int) strv_length(a); |
03cc0fd1 | 79 | |
ae2a15bc | 80 | *ret = TAKE_PTR(a); |
03cc0fd1 LP |
81 | return r; |
82 | } | |
83 | ||
73fc8522 | 84 | int sd_network_get_dns(char ***ret) { |
03cc0fd1 LP |
85 | return network_get_strv("DNS", ret); |
86 | } | |
87 | ||
73fc8522 | 88 | int sd_network_get_ntp(char ***ret) { |
03cc0fd1 LP |
89 | return network_get_strv("NTP", ret); |
90 | } | |
91 | ||
73fc8522 | 92 | int sd_network_get_search_domains(char ***ret) { |
8612e936 LP |
93 | return network_get_strv("DOMAINS", ret); |
94 | } | |
95 | ||
73fc8522 | 96 | int sd_network_get_route_domains(char ***ret) { |
3df9bec5 LP |
97 | return network_get_strv("ROUTE_DOMAINS", ret); |
98 | } | |
99 | ||
38e5900f | 100 | static int network_link_get_string(int ifindex, const char *field, char **ret) { |
f4af5f00 | 101 | char path[STRLEN("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex)]; |
5f02f341 | 102 | _cleanup_free_ char *s = NULL; |
03cc0fd1 LP |
103 | int r; |
104 | ||
105 | assert_return(ifindex > 0, -EINVAL); | |
38e5900f | 106 | assert_return(ret, -EINVAL); |
bbf7c048 | 107 | |
5f02f341 | 108 | xsprintf(path, "/run/systemd/netif/links/%i", ifindex); |
03cc0fd1 | 109 | |
13df9c39 | 110 | r = parse_env_file(NULL, path, field, &s); |
03cc0fd1 | 111 | if (r < 0) |
bbf7c048 | 112 | return r; |
03cc0fd1 LP |
113 | if (isempty(s)) |
114 | return -ENODATA; | |
bbf7c048 | 115 | |
ae2a15bc | 116 | *ret = TAKE_PTR(s); |
bbf7c048 TG |
117 | return 0; |
118 | } | |
119 | ||
c9d22489 YW |
120 | static int network_link_get_boolean(int ifindex, const char *key) { |
121 | _cleanup_free_ char *s = NULL; | |
122 | int r; | |
123 | ||
124 | r = network_link_get_string(ifindex, key, &s); | |
125 | if (r < 0) | |
126 | return r; | |
127 | ||
128 | return parse_boolean(s); | |
129 | } | |
130 | ||
8a516214 | 131 | static int network_link_get_strv(int ifindex, const char *key, char ***ret) { |
8a516214 | 132 | _cleanup_strv_free_ char **a = NULL; |
5f02f341 | 133 | _cleanup_free_ char *s = NULL; |
8a516214 LP |
134 | int r; |
135 | ||
136 | assert_return(ifindex > 0, -EINVAL); | |
137 | assert_return(ret, -EINVAL); | |
138 | ||
e05dd771 | 139 | r = network_link_get_string(ifindex, key, &s); |
8a516214 LP |
140 | if (r < 0) |
141 | return r; | |
8a516214 | 142 | |
27b13df4 | 143 | a = strv_split(s, NULL); |
8a516214 LP |
144 | if (!a) |
145 | return -ENOMEM; | |
146 | ||
147 | strv_uniq(a); | |
da6053d0 | 148 | r = (int) strv_length(a); |
8a516214 | 149 | |
ae2a15bc | 150 | *ret = TAKE_PTR(a); |
8a516214 LP |
151 | return r; |
152 | } | |
153 | ||
e7c1b3f7 YW |
154 | int sd_network_link_get_setup_state(int ifindex, char **ret) { |
155 | return network_link_get_string(ifindex, "ADMIN_STATE", ret); | |
38e5900f | 156 | } |
adc5b2e2 | 157 | |
e7c1b3f7 YW |
158 | int sd_network_link_get_network_file(int ifindex, char **ret) { |
159 | return network_link_get_string(ifindex, "NETWORK_FILE", ret); | |
adc5b2e2 TG |
160 | } |
161 | ||
a2640646 DDM |
162 | int sd_network_link_get_network_file_dropins(int ifindex, char ***ret) { |
163 | _cleanup_free_ char **sv = NULL, *joined = NULL; | |
164 | int r; | |
165 | ||
166 | assert_return(ifindex > 0, -EINVAL); | |
167 | assert_return(ret, -EINVAL); | |
168 | ||
169 | r = network_link_get_string(ifindex, "NETWORK_FILE_DROPINS", &joined); | |
170 | if (r < 0) | |
171 | return r; | |
172 | ||
173 | r = strv_split_full(&sv, joined, ":", EXTRACT_CUNESCAPE); | |
174 | if (r < 0) | |
175 | return r; | |
176 | ||
177 | *ret = TAKE_PTR(sv); | |
178 | return 0; | |
179 | } | |
180 | ||
e7c1b3f7 YW |
181 | int sd_network_link_get_operational_state(int ifindex, char **ret) { |
182 | return network_link_get_string(ifindex, "OPER_STATE", ret); | |
fe8db0c5 TG |
183 | } |
184 | ||
e7c1b3f7 | 185 | int sd_network_link_get_required_family_for_online(int ifindex, char **ret) { |
778e3da9 | 186 | return network_link_get_string(ifindex, "REQUIRED_FAMILY_FOR_ONLINE", ret); |
bbea8813 L |
187 | } |
188 | ||
e7c1b3f7 YW |
189 | int sd_network_link_get_carrier_state(int ifindex, char **ret) { |
190 | return network_link_get_string(ifindex, "CARRIER_STATE", ret); | |
ac999bf0 YW |
191 | } |
192 | ||
e7c1b3f7 YW |
193 | int sd_network_link_get_address_state(int ifindex, char **ret) { |
194 | return network_link_get_string(ifindex, "ADDRESS_STATE", ret); | |
ac999bf0 YW |
195 | } |
196 | ||
e7c1b3f7 YW |
197 | int sd_network_link_get_ipv4_address_state(int ifindex, char **ret) { |
198 | return network_link_get_string(ifindex, "IPV4_ADDRESS_STATE", ret); | |
bbea8813 L |
199 | } |
200 | ||
e7c1b3f7 YW |
201 | int sd_network_link_get_ipv6_address_state(int ifindex, char **ret) { |
202 | return network_link_get_string(ifindex, "IPV6_ADDRESS_STATE", ret); | |
bbea8813 L |
203 | } |
204 | ||
e7c1b3f7 YW |
205 | int sd_network_link_get_online_state(int ifindex, char **ret) { |
206 | return network_link_get_string(ifindex, "ONLINE_STATE", ret); | |
bcdcc596 AŠ |
207 | } |
208 | ||
e7c1b3f7 YW |
209 | int sd_network_link_get_dhcp6_client_iaid_string(int ifindex, char **ret) { |
210 | return network_link_get_string(ifindex, "DHCP6_CLIENT_IAID", ret); | |
01dd1380 SS |
211 | } |
212 | ||
e7c1b3f7 YW |
213 | int sd_network_link_get_dhcp6_client_duid_string(int ifindex, char **ret) { |
214 | return network_link_get_string(ifindex, "DHCP6_CLIENT_DUID", ret); | |
a9deab2e SS |
215 | } |
216 | ||
73fc8522 | 217 | int sd_network_link_get_required_for_online(int ifindex) { |
778e3da9 | 218 | return network_link_get_boolean(ifindex, "REQUIRED_FOR_ONLINE"); |
c1a38904 MTL |
219 | } |
220 | ||
e7c1b3f7 | 221 | int sd_network_link_get_required_operstate_for_online(int ifindex, char **ret) { |
778e3da9 | 222 | return network_link_get_string(ifindex, "REQUIRED_OPER_STATE_FOR_ONLINE", ret); |
22eab27c YW |
223 | } |
224 | ||
e7c1b3f7 | 225 | int sd_network_link_get_activation_policy(int ifindex, char **ret) { |
778e3da9 | 226 | return network_link_get_string(ifindex, "ACTIVATION_POLICY", ret); |
a853652a DS |
227 | } |
228 | ||
e7c1b3f7 YW |
229 | int sd_network_link_get_llmnr(int ifindex, char **ret) { |
230 | return network_link_get_string(ifindex, "LLMNR", ret); | |
bd8f6538 TG |
231 | } |
232 | ||
e7c1b3f7 YW |
233 | int sd_network_link_get_mdns(int ifindex, char **ret) { |
234 | return network_link_get_string(ifindex, "MDNS", ret); | |
aaa297d4 LP |
235 | } |
236 | ||
e7c1b3f7 YW |
237 | int sd_network_link_get_dns_over_tls(int ifindex, char **ret) { |
238 | return network_link_get_string(ifindex, "DNS_OVER_TLS", ret); | |
d050561a IT |
239 | } |
240 | ||
e7c1b3f7 YW |
241 | int sd_network_link_get_dnssec(int ifindex, char **ret) { |
242 | return network_link_get_string(ifindex, "DNSSEC", ret); | |
ad6c0475 LP |
243 | } |
244 | ||
e7c1b3f7 YW |
245 | int sd_network_link_get_dnssec_negative_trust_anchors(int ifindex, char ***ret) { |
246 | return network_link_get_strv(ifindex, "DNSSEC_NTA", ret); | |
8a516214 LP |
247 | } |
248 | ||
73fc8522 | 249 | int sd_network_link_get_dns(int ifindex, char ***ret) { |
8a516214 | 250 | return network_link_get_strv(ifindex, "DNS", ret); |
bcb7a07e TG |
251 | } |
252 | ||
73fc8522 | 253 | int sd_network_link_get_ntp(int ifindex, char ***ret) { |
8a516214 | 254 | return network_link_get_strv(ifindex, "NTP", ret); |
bcb7a07e TG |
255 | } |
256 | ||
73fc8522 | 257 | int sd_network_link_get_sip(int ifindex, char ***ret) { |
eb46288c SS |
258 | return network_link_get_strv(ifindex, "SIP", ret); |
259 | } | |
260 | ||
edb88a72 RP |
261 | int sd_network_link_get_captive_portal(int ifindex, char **ret) { |
262 | return network_link_get_string(ifindex, "CAPTIVE_PORTAL", ret); | |
263 | } | |
264 | ||
73fc8522 | 265 | int sd_network_link_get_search_domains(int ifindex, char ***ret) { |
8a516214 | 266 | return network_link_get_strv(ifindex, "DOMAINS", ret); |
9b4d1882 TG |
267 | } |
268 | ||
73fc8522 | 269 | int sd_network_link_get_route_domains(int ifindex, char ***ret) { |
3df9bec5 LP |
270 | return network_link_get_strv(ifindex, "ROUTE_DOMAINS", ret); |
271 | } | |
272 | ||
73fc8522 | 273 | int sd_network_link_get_dns_default_route(int ifindex) { |
c9d22489 | 274 | return network_link_get_boolean(ifindex, "DNS_DEFAULT_ROUTE"); |
c629354e LP |
275 | } |
276 | ||
b295beea | 277 | static int network_link_get_ifindexes(int ifindex, const char *key, int **ret) { |
b295beea | 278 | _cleanup_free_ int *ifis = NULL; |
5f02f341 | 279 | _cleanup_free_ char *s = NULL; |
319a4f4b | 280 | size_t c = 0; |
b295beea LP |
281 | int r; |
282 | ||
283 | assert_return(ifindex > 0, -EINVAL); | |
284 | assert_return(ret, -EINVAL); | |
285 | ||
e05dd771 | 286 | r = network_link_get_string(ifindex, key, &s); |
b295beea LP |
287 | if (r < 0) |
288 | return r; | |
b295beea | 289 | |
597da51b | 290 | for (const char *x = s;;) { |
b295beea LP |
291 | _cleanup_free_ char *word = NULL; |
292 | ||
293 | r = extract_first_word(&x, &word, NULL, 0); | |
294 | if (r < 0) | |
295 | return r; | |
296 | if (r == 0) | |
297 | break; | |
298 | ||
319a4f4b | 299 | if (!GREEDY_REALLOC(ifis, c + 2)) |
b295beea LP |
300 | return -ENOMEM; |
301 | ||
597da51b ZJS |
302 | r = ifis[c++] = parse_ifindex(word); |
303 | if (r < 0) | |
304 | return r; | |
b295beea LP |
305 | } |
306 | ||
c58bd76a | 307 | if (ifis) |
13e785f7 | 308 | ifis[c] = 0; /* Let's add a 0 ifindex to the end, to be nice */ |
b295beea | 309 | |
ae2a15bc | 310 | *ret = TAKE_PTR(ifis); |
b295beea LP |
311 | return c; |
312 | } | |
313 | ||
73fc8522 | 314 | int sd_network_link_get_carrier_bound_to(int ifindex, int **ret) { |
b295beea | 315 | return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_TO", ret); |
0d4ad91d AR |
316 | } |
317 | ||
73fc8522 | 318 | int sd_network_link_get_carrier_bound_by(int ifindex, int **ret) { |
b295beea | 319 | return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_BY", ret); |
0d4ad91d AR |
320 | } |
321 | ||
8e0bacab YW |
322 | int sd_network_link_get_stat(int ifindex, struct stat *ret) { |
323 | char path[STRLEN("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex)]; | |
324 | struct stat st; | |
325 | ||
326 | assert_return(ifindex > 0, -EINVAL); | |
327 | ||
328 | xsprintf(path, "/run/systemd/netif/links/%i", ifindex); | |
329 | ||
330 | if (stat(path, &st) < 0) | |
331 | return -errno; | |
332 | ||
333 | if (ret) | |
334 | *ret = st; | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
a1e92eee | 339 | static int MONITOR_TO_FD(sd_network_monitor *m) { |
fe8db0c5 TG |
340 | return (int) (unsigned long) m - 1; |
341 | } | |
342 | ||
a1e92eee | 343 | static sd_network_monitor* FD_TO_MONITOR(int fd) { |
fe8db0c5 TG |
344 | return (sd_network_monitor*) (unsigned long) (fd + 1); |
345 | } | |
346 | ||
870395a4 | 347 | static int monitor_add_inotify_watch(int fd) { |
206c0897 | 348 | int wd; |
870395a4 | 349 | |
206c0897 DDM |
350 | wd = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE); |
351 | if (wd >= 0) | |
352 | return wd; | |
870395a4 TG |
353 | else if (errno != ENOENT) |
354 | return -errno; | |
355 | ||
206c0897 DDM |
356 | wd = inotify_add_watch(fd, "/run/systemd/netif/", IN_CREATE|IN_ISDIR); |
357 | if (wd >= 0) | |
358 | return wd; | |
870395a4 TG |
359 | else if (errno != ENOENT) |
360 | return -errno; | |
361 | ||
206c0897 DDM |
362 | wd = inotify_add_watch(fd, "/run/systemd/", IN_CREATE|IN_ISDIR); |
363 | if (wd < 0) | |
870395a4 TG |
364 | return -errno; |
365 | ||
206c0897 | 366 | return wd; |
870395a4 TG |
367 | } |
368 | ||
73fc8522 | 369 | int sd_network_monitor_new(sd_network_monitor **m, const char *category) { |
254d1313 | 370 | _cleanup_close_ int fd = -EBADF; |
870395a4 | 371 | int k; |
fe8db0c5 TG |
372 | bool good = false; |
373 | ||
374 | assert_return(m, -EINVAL); | |
375 | ||
376 | fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
377 | if (fd < 0) | |
378 | return -errno; | |
379 | ||
7e141e49 | 380 | if (!category || streq(category, "links")) { |
870395a4 TG |
381 | k = monitor_add_inotify_watch(fd); |
382 | if (k < 0) | |
383 | return k; | |
fe8db0c5 TG |
384 | |
385 | good = true; | |
386 | } | |
387 | ||
3de1c8ce | 388 | if (!good) |
fe8db0c5 | 389 | return -EINVAL; |
fe8db0c5 | 390 | |
d52e1c42 | 391 | *m = FD_TO_MONITOR(TAKE_FD(fd)); |
fe8db0c5 TG |
392 | return 0; |
393 | } | |
394 | ||
73fc8522 | 395 | sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) { |
d52e1c42 | 396 | if (m) |
b87dfaa2 | 397 | (void) close_nointr(MONITOR_TO_FD(m)); |
fe8db0c5 TG |
398 | |
399 | return NULL; | |
400 | } | |
401 | ||
73fc8522 | 402 | int sd_network_monitor_flush(sd_network_monitor *m) { |
870395a4 | 403 | union inotify_event_buffer buffer; |
870395a4 | 404 | ssize_t l; |
206c0897 | 405 | int fd; |
fe8db0c5 TG |
406 | |
407 | assert_return(m, -EINVAL); | |
408 | ||
870395a4 TG |
409 | fd = MONITOR_TO_FD(m); |
410 | ||
411 | l = read(fd, &buffer, sizeof(buffer)); | |
412 | if (l < 0) { | |
8add30a0 | 413 | if (ERRNO_IS_TRANSIENT(errno)) |
870395a4 TG |
414 | return 0; |
415 | ||
416 | return -errno; | |
417 | } | |
418 | ||
419 | FOREACH_INOTIFY_EVENT(e, buffer, l) { | |
420 | if (e->mask & IN_ISDIR) { | |
206c0897 DDM |
421 | int wd; |
422 | ||
423 | wd = monitor_add_inotify_watch(fd); | |
424 | if (wd < 0) | |
425 | return wd; | |
870395a4 | 426 | |
206c0897 DDM |
427 | if (wd != e->wd) { |
428 | if (inotify_rm_watch(fd, e->wd) < 0) | |
429 | return -errno; | |
430 | } | |
870395a4 TG |
431 | } |
432 | } | |
433 | ||
434 | return 0; | |
fe8db0c5 TG |
435 | } |
436 | ||
73fc8522 | 437 | int sd_network_monitor_get_fd(sd_network_monitor *m) { |
fe8db0c5 TG |
438 | assert_return(m, -EINVAL); |
439 | ||
440 | return MONITOR_TO_FD(m); | |
441 | } | |
442 | ||
73fc8522 | 443 | int sd_network_monitor_get_events(sd_network_monitor *m) { |
fe8db0c5 TG |
444 | assert_return(m, -EINVAL); |
445 | ||
446 | /* For now we will only return POLLIN here, since we don't | |
447 | * need anything else ever for inotify. However, let's have | |
448 | * this API to keep our options open should we later on need | |
449 | * it. */ | |
450 | return POLLIN; | |
451 | } | |
452 | ||
e7c1b3f7 | 453 | int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *ret_usec) { |
fe8db0c5 | 454 | assert_return(m, -EINVAL); |
e7c1b3f7 | 455 | assert_return(ret_usec, -EINVAL); |
fe8db0c5 | 456 | |
f5fbe71d | 457 | /* For now we will only return UINT64_MAX, since we don't |
fe8db0c5 TG |
458 | * need any timeout. However, let's have this API to keep our |
459 | * options open should we later on need it. */ | |
e7c1b3f7 | 460 | *ret_usec = UINT64_MAX; |
fe8db0c5 TG |
461 | return 0; |
462 | } |