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