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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" |
fe8db0c5 | 13 | #include "macro.h" |
77601719 | 14 | #include "parse-util.h" |
5f02f341 | 15 | #include "stdio-util.h" |
07630cea | 16 | #include "string-util.h" |
fe8db0c5 | 17 | #include "strv.h" |
07630cea | 18 | #include "util.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); |
cb6fa44c TG |
27 | if (r == -ENOENT) |
28 | return -ENODATA; | |
03cc0fd1 | 29 | if (r < 0) |
fe8db0c5 | 30 | return r; |
03cc0fd1 LP |
31 | if (isempty(s)) |
32 | return -ENODATA; | |
deb2e523 | 33 | |
ac999bf0 | 34 | *ret = TAKE_PTR(s); |
deb2e523 TG |
35 | |
36 | return 0; | |
37 | } | |
38 | ||
ac999bf0 YW |
39 | _public_ int sd_network_get_operational_state(char **state) { |
40 | return network_get_string("OPER_STATE", state); | |
41 | } | |
42 | ||
43 | _public_ int sd_network_get_carrier_state(char **state) { | |
44 | return network_get_string("CARRIER_STATE", state); | |
45 | } | |
46 | ||
47 | _public_ int sd_network_get_address_state(char **state) { | |
48 | return network_get_string("ADDRESS_STATE", state); | |
49 | } | |
50 | ||
bbea8813 L |
51 | _public_ int sd_network_get_ipv4_address_state(char **state) { |
52 | return network_get_string("IPV4_ADDRESS_STATE", state); | |
53 | } | |
54 | ||
55 | _public_ int sd_network_get_ipv6_address_state(char **state) { | |
56 | return network_get_string("IPV6_ADDRESS_STATE", state); | |
57 | } | |
58 | ||
bcdcc596 AŠ |
59 | _public_ int sd_network_get_online_state(char **state) { |
60 | return network_get_string("ONLINE_STATE", state); | |
61 | } | |
62 | ||
03cc0fd1 LP |
63 | static int network_get_strv(const char *key, char ***ret) { |
64 | _cleanup_strv_free_ char **a = NULL; | |
bbf7c048 TG |
65 | _cleanup_free_ char *s = NULL; |
66 | int r; | |
67 | ||
03cc0fd1 LP |
68 | assert_return(ret, -EINVAL); |
69 | ||
13df9c39 | 70 | r = parse_env_file(NULL, "/run/systemd/netif/state", key, &s); |
03cc0fd1 LP |
71 | if (r == -ENOENT) |
72 | return -ENODATA; | |
73 | if (r < 0) | |
74 | return r; | |
75 | if (isempty(s)) { | |
76 | *ret = NULL; | |
77 | return 0; | |
78 | } | |
79 | ||
80 | a = strv_split(s, " "); | |
81 | if (!a) | |
82 | return -ENOMEM; | |
83 | ||
84 | strv_uniq(a); | |
da6053d0 | 85 | r = (int) strv_length(a); |
03cc0fd1 | 86 | |
ae2a15bc | 87 | *ret = TAKE_PTR(a); |
03cc0fd1 LP |
88 | |
89 | return r; | |
90 | } | |
91 | ||
92 | _public_ int sd_network_get_dns(char ***ret) { | |
93 | return network_get_strv("DNS", ret); | |
94 | } | |
95 | ||
96 | _public_ int sd_network_get_ntp(char ***ret) { | |
97 | return network_get_strv("NTP", ret); | |
98 | } | |
99 | ||
3df9bec5 | 100 | _public_ int sd_network_get_search_domains(char ***ret) { |
8612e936 LP |
101 | return network_get_strv("DOMAINS", ret); |
102 | } | |
103 | ||
3df9bec5 LP |
104 | _public_ int sd_network_get_route_domains(char ***ret) { |
105 | return network_get_strv("ROUTE_DOMAINS", ret); | |
106 | } | |
107 | ||
38e5900f | 108 | static int network_link_get_string(int ifindex, const char *field, char **ret) { |
fbd0b64f | 109 | char path[STRLEN("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1]; |
5f02f341 | 110 | _cleanup_free_ char *s = NULL; |
03cc0fd1 LP |
111 | int r; |
112 | ||
113 | assert_return(ifindex > 0, -EINVAL); | |
38e5900f | 114 | assert_return(ret, -EINVAL); |
bbf7c048 | 115 | |
5f02f341 | 116 | xsprintf(path, "/run/systemd/netif/links/%i", ifindex); |
03cc0fd1 | 117 | |
13df9c39 | 118 | r = parse_env_file(NULL, path, field, &s); |
bbf7c048 TG |
119 | if (r == -ENOENT) |
120 | return -ENODATA; | |
03cc0fd1 | 121 | if (r < 0) |
bbf7c048 | 122 | return r; |
03cc0fd1 LP |
123 | if (isempty(s)) |
124 | return -ENODATA; | |
bbf7c048 | 125 | |
ae2a15bc | 126 | *ret = TAKE_PTR(s); |
bbf7c048 TG |
127 | |
128 | return 0; | |
129 | } | |
130 | ||
8a516214 | 131 | static int network_link_get_strv(int ifindex, const char *key, char ***ret) { |
fbd0b64f | 132 | char path[STRLEN("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1]; |
8a516214 | 133 | _cleanup_strv_free_ char **a = NULL; |
5f02f341 | 134 | _cleanup_free_ char *s = NULL; |
8a516214 LP |
135 | int r; |
136 | ||
137 | assert_return(ifindex > 0, -EINVAL); | |
138 | assert_return(ret, -EINVAL); | |
139 | ||
5f02f341 | 140 | xsprintf(path, "/run/systemd/netif/links/%i", ifindex); |
13df9c39 | 141 | r = parse_env_file(NULL, path, key, &s); |
8a516214 LP |
142 | if (r == -ENOENT) |
143 | return -ENODATA; | |
144 | if (r < 0) | |
145 | return r; | |
146 | if (isempty(s)) { | |
147 | *ret = NULL; | |
148 | return 0; | |
149 | } | |
150 | ||
151 | a = strv_split(s, " "); | |
152 | if (!a) | |
153 | return -ENOMEM; | |
154 | ||
155 | strv_uniq(a); | |
da6053d0 | 156 | r = (int) strv_length(a); |
8a516214 | 157 | |
ae2a15bc | 158 | *ret = TAKE_PTR(a); |
8a516214 LP |
159 | |
160 | return r; | |
161 | } | |
162 | ||
38e5900f LP |
163 | _public_ int sd_network_link_get_setup_state(int ifindex, char **state) { |
164 | return network_link_get_string(ifindex, "ADMIN_STATE", state); | |
165 | } | |
adc5b2e2 | 166 | |
38e5900f LP |
167 | _public_ int sd_network_link_get_network_file(int ifindex, char **filename) { |
168 | return network_link_get_string(ifindex, "NETWORK_FILE", filename); | |
adc5b2e2 TG |
169 | } |
170 | ||
d6731e4c | 171 | _public_ int sd_network_link_get_operational_state(int ifindex, char **state) { |
38e5900f | 172 | return network_link_get_string(ifindex, "OPER_STATE", state); |
fe8db0c5 TG |
173 | } |
174 | ||
bbea8813 L |
175 | _public_ int sd_network_link_get_required_family_for_online(int ifindex, char **state) { |
176 | _cleanup_free_ char *s = NULL; | |
177 | int r; | |
178 | ||
179 | assert_return(state, -EINVAL); | |
180 | ||
181 | r = network_link_get_string(ifindex, "REQUIRED_FAMILY_FOR_ONLINE", &s); | |
182 | if (r < 0) { | |
183 | if (r != -ENODATA) | |
184 | return r; | |
185 | ||
186 | s = strdup("any"); | |
187 | if (!s) | |
188 | return -ENOMEM; | |
189 | } | |
190 | ||
191 | *state = TAKE_PTR(s); | |
192 | return 0; | |
193 | } | |
194 | ||
ac999bf0 YW |
195 | _public_ int sd_network_link_get_carrier_state(int ifindex, char **state) { |
196 | return network_link_get_string(ifindex, "CARRIER_STATE", state); | |
197 | } | |
198 | ||
199 | _public_ int sd_network_link_get_address_state(int ifindex, char **state) { | |
200 | return network_link_get_string(ifindex, "ADDRESS_STATE", state); | |
201 | } | |
202 | ||
bbea8813 L |
203 | _public_ int sd_network_link_get_ipv4_address_state(int ifindex, char **state) { |
204 | return network_link_get_string(ifindex, "IPV4_ADDRESS_STATE", state); | |
205 | } | |
206 | ||
207 | _public_ int sd_network_link_get_ipv6_address_state(int ifindex, char **state) { | |
208 | return network_link_get_string(ifindex, "IPV6_ADDRESS_STATE", state); | |
209 | } | |
210 | ||
bcdcc596 AŠ |
211 | _public_ int sd_network_link_get_online_state(int ifindex, char **state) { |
212 | return network_link_get_string(ifindex, "ONLINE_STATE", state); | |
213 | } | |
214 | ||
01dd1380 SS |
215 | _public_ int sd_network_link_get_dhcp6_client_iaid_string(int ifindex, char **iaid) { |
216 | return network_link_get_string(ifindex, "DHCP6_CLIENT_IAID", iaid); | |
217 | } | |
218 | ||
a9deab2e SS |
219 | _public_ int sd_network_link_get_dhcp6_client_duid_string(int ifindex, char **duid) { |
220 | return network_link_get_string(ifindex, "DHCP6_CLIENT_DUID", duid); | |
221 | } | |
222 | ||
c1a38904 MTL |
223 | _public_ int sd_network_link_get_required_for_online(int ifindex) { |
224 | _cleanup_free_ char *s = NULL; | |
225 | int r; | |
226 | ||
227 | r = network_link_get_string(ifindex, "REQUIRED_FOR_ONLINE", &s); | |
228 | if (r < 0) { | |
229 | /* Handle -ENODATA as RequiredForOnline=yes, for compatibility */ | |
230 | if (r == -ENODATA) | |
231 | return true; | |
232 | return r; | |
233 | } | |
234 | ||
235 | return parse_boolean(s); | |
236 | } | |
237 | ||
22eab27c YW |
238 | _public_ int sd_network_link_get_required_operstate_for_online(int ifindex, char **state) { |
239 | _cleanup_free_ char *s = NULL; | |
240 | int r; | |
241 | ||
242 | assert_return(state, -EINVAL); | |
243 | ||
244 | r = network_link_get_string(ifindex, "REQUIRED_OPER_STATE_FOR_ONLINE", &s); | |
245 | if (r < 0) { | |
246 | if (r != -ENODATA) | |
247 | return r; | |
248 | ||
249 | /* For compatibility, assuming degraded. */ | |
250 | s = strdup("degraded"); | |
251 | if (!s) | |
252 | return -ENOMEM; | |
253 | } | |
254 | ||
255 | *state = TAKE_PTR(s); | |
256 | return 0; | |
257 | } | |
258 | ||
a853652a DS |
259 | _public_ int sd_network_link_get_activation_policy(int ifindex, char **policy) { |
260 | _cleanup_free_ char *s = NULL; | |
261 | int r; | |
262 | ||
263 | assert_return(policy, -EINVAL); | |
264 | ||
265 | r = network_link_get_string(ifindex, "ACTIVATION_POLICY", &s); | |
266 | if (r < 0) { | |
267 | if (r != -ENODATA) | |
268 | return r; | |
269 | ||
270 | /* For compatibility, assuming up. */ | |
271 | s = strdup("up"); | |
272 | if (!s) | |
273 | return -ENOMEM; | |
274 | } | |
275 | ||
276 | *policy = TAKE_PTR(s); | |
277 | return 0; | |
278 | } | |
279 | ||
d6731e4c | 280 | _public_ int sd_network_link_get_llmnr(int ifindex, char **llmnr) { |
38e5900f | 281 | return network_link_get_string(ifindex, "LLMNR", llmnr); |
bd8f6538 TG |
282 | } |
283 | ||
aaa297d4 LP |
284 | _public_ int sd_network_link_get_mdns(int ifindex, char **mdns) { |
285 | return network_link_get_string(ifindex, "MDNS", mdns); | |
286 | } | |
287 | ||
c9299be2 IT |
288 | _public_ int sd_network_link_get_dns_over_tls(int ifindex, char **dns_over_tls) { |
289 | return network_link_get_string(ifindex, "DNS_OVER_TLS", dns_over_tls); | |
d050561a IT |
290 | } |
291 | ||
ad6c0475 LP |
292 | _public_ int sd_network_link_get_dnssec(int ifindex, char **dnssec) { |
293 | return network_link_get_string(ifindex, "DNSSEC", dnssec); | |
294 | } | |
295 | ||
8a516214 LP |
296 | _public_ int sd_network_link_get_dnssec_negative_trust_anchors(int ifindex, char ***nta) { |
297 | return network_link_get_strv(ifindex, "DNSSEC_NTA", nta); | |
298 | } | |
299 | ||
d6731e4c | 300 | _public_ int sd_network_link_get_dns(int ifindex, char ***ret) { |
8a516214 | 301 | return network_link_get_strv(ifindex, "DNS", ret); |
bcb7a07e TG |
302 | } |
303 | ||
d6731e4c | 304 | _public_ int sd_network_link_get_ntp(int ifindex, char ***ret) { |
8a516214 | 305 | return network_link_get_strv(ifindex, "NTP", ret); |
bcb7a07e TG |
306 | } |
307 | ||
eb46288c SS |
308 | _public_ int sd_network_link_get_sip(int ifindex, char ***ret) { |
309 | return network_link_get_strv(ifindex, "SIP", ret); | |
310 | } | |
311 | ||
3df9bec5 | 312 | _public_ int sd_network_link_get_search_domains(int ifindex, char ***ret) { |
8a516214 | 313 | return network_link_get_strv(ifindex, "DOMAINS", ret); |
9b4d1882 TG |
314 | } |
315 | ||
3df9bec5 LP |
316 | _public_ int sd_network_link_get_route_domains(int ifindex, char ***ret) { |
317 | return network_link_get_strv(ifindex, "ROUTE_DOMAINS", ret); | |
318 | } | |
319 | ||
c629354e LP |
320 | _public_ int sd_network_link_get_dns_default_route(int ifindex) { |
321 | char path[STRLEN("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1]; | |
322 | _cleanup_free_ char *s = NULL; | |
323 | int r; | |
324 | ||
325 | assert_return(ifindex > 0, -EINVAL); | |
326 | ||
327 | xsprintf(path, "/run/systemd/netif/links/%i", ifindex); | |
328 | ||
329 | r = parse_env_file(NULL, path, "DNS_DEFAULT_ROUTE", &s); | |
330 | if (r == -ENOENT) | |
331 | return -ENODATA; | |
332 | if (r < 0) | |
333 | return r; | |
334 | if (isempty(s)) | |
335 | return -ENODATA; | |
336 | return parse_boolean(s); | |
337 | } | |
338 | ||
b295beea | 339 | static int network_link_get_ifindexes(int ifindex, const char *key, int **ret) { |
fbd0b64f | 340 | char path[STRLEN("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1]; |
b295beea | 341 | _cleanup_free_ int *ifis = NULL; |
5f02f341 | 342 | _cleanup_free_ char *s = NULL; |
319a4f4b | 343 | size_t c = 0; |
b295beea LP |
344 | int r; |
345 | ||
346 | assert_return(ifindex > 0, -EINVAL); | |
347 | assert_return(ret, -EINVAL); | |
348 | ||
5f02f341 | 349 | xsprintf(path, "/run/systemd/netif/links/%i", ifindex); |
13df9c39 | 350 | r = parse_env_file(NULL, path, key, &s); |
b295beea LP |
351 | if (r == -ENOENT) |
352 | return -ENODATA; | |
353 | if (r < 0) | |
354 | return r; | |
b295beea | 355 | |
597da51b | 356 | for (const char *x = s;;) { |
b295beea LP |
357 | _cleanup_free_ char *word = NULL; |
358 | ||
359 | r = extract_first_word(&x, &word, NULL, 0); | |
360 | if (r < 0) | |
361 | return r; | |
362 | if (r == 0) | |
363 | break; | |
364 | ||
319a4f4b | 365 | if (!GREEDY_REALLOC(ifis, c + 2)) |
b295beea LP |
366 | return -ENOMEM; |
367 | ||
597da51b ZJS |
368 | r = ifis[c++] = parse_ifindex(word); |
369 | if (r < 0) | |
370 | return r; | |
b295beea LP |
371 | } |
372 | ||
c58bd76a | 373 | if (ifis) |
13e785f7 | 374 | ifis[c] = 0; /* Let's add a 0 ifindex to the end, to be nice */ |
b295beea | 375 | |
ae2a15bc | 376 | *ret = TAKE_PTR(ifis); |
b295beea LP |
377 | |
378 | return c; | |
379 | } | |
380 | ||
381 | _public_ int sd_network_link_get_carrier_bound_to(int ifindex, int **ret) { | |
382 | return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_TO", ret); | |
0d4ad91d AR |
383 | } |
384 | ||
b295beea LP |
385 | _public_ int sd_network_link_get_carrier_bound_by(int ifindex, int **ret) { |
386 | return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_BY", ret); | |
0d4ad91d AR |
387 | } |
388 | ||
a1e92eee | 389 | static int MONITOR_TO_FD(sd_network_monitor *m) { |
fe8db0c5 TG |
390 | return (int) (unsigned long) m - 1; |
391 | } | |
392 | ||
a1e92eee | 393 | static sd_network_monitor* FD_TO_MONITOR(int fd) { |
fe8db0c5 TG |
394 | return (sd_network_monitor*) (unsigned long) (fd + 1); |
395 | } | |
396 | ||
870395a4 TG |
397 | static int monitor_add_inotify_watch(int fd) { |
398 | int k; | |
399 | ||
400 | k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE); | |
401 | if (k >= 0) | |
402 | return 0; | |
403 | else if (errno != ENOENT) | |
404 | return -errno; | |
405 | ||
406 | k = inotify_add_watch(fd, "/run/systemd/netif/", IN_CREATE|IN_ISDIR); | |
407 | if (k >= 0) | |
408 | return 0; | |
409 | else if (errno != ENOENT) | |
410 | return -errno; | |
411 | ||
412 | k = inotify_add_watch(fd, "/run/systemd/", IN_CREATE|IN_ISDIR); | |
413 | if (k < 0) | |
414 | return -errno; | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
0014a4ad | 419 | _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) { |
870395a4 TG |
420 | _cleanup_close_ int fd = -1; |
421 | int k; | |
fe8db0c5 TG |
422 | bool good = false; |
423 | ||
424 | assert_return(m, -EINVAL); | |
425 | ||
426 | fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
427 | if (fd < 0) | |
428 | return -errno; | |
429 | ||
7e141e49 | 430 | if (!category || streq(category, "links")) { |
870395a4 TG |
431 | k = monitor_add_inotify_watch(fd); |
432 | if (k < 0) | |
433 | return k; | |
fe8db0c5 TG |
434 | |
435 | good = true; | |
436 | } | |
437 | ||
3de1c8ce | 438 | if (!good) |
fe8db0c5 | 439 | return -EINVAL; |
fe8db0c5 | 440 | |
d52e1c42 | 441 | *m = FD_TO_MONITOR(TAKE_FD(fd)); |
fe8db0c5 TG |
442 | return 0; |
443 | } | |
444 | ||
445 | _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) { | |
d52e1c42 | 446 | if (m) |
b87dfaa2 | 447 | (void) close_nointr(MONITOR_TO_FD(m)); |
fe8db0c5 TG |
448 | |
449 | return NULL; | |
450 | } | |
451 | ||
452 | _public_ int sd_network_monitor_flush(sd_network_monitor *m) { | |
870395a4 TG |
453 | union inotify_event_buffer buffer; |
454 | struct inotify_event *e; | |
455 | ssize_t l; | |
456 | int fd, k; | |
fe8db0c5 TG |
457 | |
458 | assert_return(m, -EINVAL); | |
459 | ||
870395a4 TG |
460 | fd = MONITOR_TO_FD(m); |
461 | ||
462 | l = read(fd, &buffer, sizeof(buffer)); | |
463 | if (l < 0) { | |
945c2931 | 464 | if (IN_SET(errno, EAGAIN, EINTR)) |
870395a4 TG |
465 | return 0; |
466 | ||
467 | return -errno; | |
468 | } | |
469 | ||
470 | FOREACH_INOTIFY_EVENT(e, buffer, l) { | |
471 | if (e->mask & IN_ISDIR) { | |
472 | k = monitor_add_inotify_watch(fd); | |
473 | if (k < 0) | |
474 | return k; | |
475 | ||
476 | k = inotify_rm_watch(fd, e->wd); | |
477 | if (k < 0) | |
478 | return -errno; | |
479 | } | |
480 | } | |
481 | ||
482 | return 0; | |
fe8db0c5 TG |
483 | } |
484 | ||
485 | _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) { | |
486 | ||
487 | assert_return(m, -EINVAL); | |
488 | ||
489 | return MONITOR_TO_FD(m); | |
490 | } | |
491 | ||
492 | _public_ int sd_network_monitor_get_events(sd_network_monitor *m) { | |
493 | ||
494 | assert_return(m, -EINVAL); | |
495 | ||
496 | /* For now we will only return POLLIN here, since we don't | |
497 | * need anything else ever for inotify. However, let's have | |
498 | * this API to keep our options open should we later on need | |
499 | * it. */ | |
500 | return POLLIN; | |
501 | } | |
502 | ||
503 | _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) { | |
504 | ||
505 | assert_return(m, -EINVAL); | |
506 | assert_return(timeout_usec, -EINVAL); | |
507 | ||
f5fbe71d | 508 | /* For now we will only return UINT64_MAX, since we don't |
fe8db0c5 TG |
509 | * need any timeout. However, let's have this API to keep our |
510 | * options open should we later on need it. */ | |
f5fbe71d | 511 | *timeout_usec = UINT64_MAX; |
fe8db0c5 TG |
512 | return 0; |
513 | } |