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