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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
42f4e3c4 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
42f4e3c4 | 22 | #include <arpa/inet.h> |
07630cea | 23 | #include <errno.h> |
542563ba | 24 | #include <net/if.h> |
b31f535c | 25 | #include <netdb.h> |
2583fbea | 26 | #include <netinet/ip.h> |
07630cea LP |
27 | #include <stddef.h> |
28 | #include <stdio.h> | |
29 | #include <string.h> | |
30 | #include <sys/types.h> | |
31 | #include <unistd.h> | |
42f4e3c4 | 32 | |
2583fbea | 33 | #include "fd-util.h" |
07630cea LP |
34 | #include "fileio.h" |
35 | #include "formats-util.h" | |
42f4e3c4 | 36 | #include "macro.h" |
07630cea | 37 | #include "missing.h" |
9eb977db | 38 | #include "path-util.h" |
2583fbea | 39 | #include "socket-util.h" |
07630cea | 40 | #include "string-util.h" |
2eec67ac | 41 | #include "util.h" |
42f4e3c4 | 42 | |
542563ba | 43 | int socket_address_parse(SocketAddress *a, const char *s) { |
42f4e3c4 LP |
44 | char *e, *n; |
45 | unsigned u; | |
4d49b48c | 46 | int r; |
42f4e3c4 LP |
47 | |
48 | assert(a); | |
49 | assert(s); | |
50 | ||
9152c765 | 51 | zero(*a); |
542563ba | 52 | a->type = SOCK_STREAM; |
42f4e3c4 LP |
53 | |
54 | if (*s == '[') { | |
55 | /* IPv6 in [x:.....:z]:p notation */ | |
56 | ||
4d49b48c LP |
57 | e = strchr(s+1, ']'); |
58 | if (!e) | |
42f4e3c4 LP |
59 | return -EINVAL; |
60 | ||
4d49b48c | 61 | n = strndupa(s+1, e-s-1); |
42f4e3c4 LP |
62 | |
63 | errno = 0; | |
4d49b48c | 64 | if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) |
8333c77e | 65 | return errno > 0 ? -errno : -EINVAL; |
42f4e3c4 LP |
66 | |
67 | e++; | |
68 | if (*e != ':') | |
69 | return -EINVAL; | |
70 | ||
71 | e++; | |
4d49b48c LP |
72 | r = safe_atou(e, &u); |
73 | if (r < 0) | |
42f4e3c4 LP |
74 | return r; |
75 | ||
76 | if (u <= 0 || u > 0xFFFF) | |
77 | return -EINVAL; | |
78 | ||
79 | a->sockaddr.in6.sin6_family = AF_INET6; | |
80 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
81 | a->size = sizeof(struct sockaddr_in6); | |
42f4e3c4 LP |
82 | |
83 | } else if (*s == '/') { | |
84 | /* AF_UNIX socket */ | |
85 | ||
86 | size_t l; | |
87 | ||
88 | l = strlen(s); | |
89 | if (l >= sizeof(a->sockaddr.un.sun_path)) | |
90 | return -EINVAL; | |
91 | ||
92 | a->sockaddr.un.sun_family = AF_UNIX; | |
93 | memcpy(a->sockaddr.un.sun_path, s, l); | |
0e098b15 | 94 | a->size = offsetof(struct sockaddr_un, sun_path) + l + 1; |
42f4e3c4 | 95 | |
1c24e7bd | 96 | } else if (*s == '@') { |
42f4e3c4 LP |
97 | /* Abstract AF_UNIX socket */ |
98 | size_t l; | |
99 | ||
100 | l = strlen(s+1); | |
101 | if (l >= sizeof(a->sockaddr.un.sun_path) - 1) | |
102 | return -EINVAL; | |
103 | ||
104 | a->sockaddr.un.sun_family = AF_UNIX; | |
105 | memcpy(a->sockaddr.un.sun_path+1, s+1, l); | |
0e098b15 | 106 | a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l; |
42f4e3c4 LP |
107 | |
108 | } else { | |
4d49b48c LP |
109 | e = strchr(s, ':'); |
110 | if (e) { | |
111 | r = safe_atou(e+1, &u); | |
112 | if (r < 0) | |
542563ba LP |
113 | return r; |
114 | ||
115 | if (u <= 0 || u > 0xFFFF) | |
116 | return -EINVAL; | |
42f4e3c4 | 117 | |
4d49b48c | 118 | n = strndupa(s, e-s); |
42f4e3c4 | 119 | |
542563ba | 120 | /* IPv4 in w.x.y.z:p notation? */ |
4d49b48c LP |
121 | r = inet_pton(AF_INET, n, &a->sockaddr.in.sin_addr); |
122 | if (r < 0) | |
542563ba | 123 | return -errno; |
42f4e3c4 | 124 | |
542563ba LP |
125 | if (r > 0) { |
126 | /* Gotcha, it's a traditional IPv4 address */ | |
4d49b48c LP |
127 | a->sockaddr.in.sin_family = AF_INET; |
128 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
542563ba LP |
129 | a->size = sizeof(struct sockaddr_in); |
130 | } else { | |
131 | unsigned idx; | |
42f4e3c4 | 132 | |
4d49b48c | 133 | if (strlen(n) > IF_NAMESIZE-1) |
acbb0225 | 134 | return -EINVAL; |
acbb0225 | 135 | |
542563ba LP |
136 | /* Uh, our last resort, an interface name */ |
137 | idx = if_nametoindex(n); | |
83c60c9f | 138 | if (idx == 0) |
542563ba | 139 | return -EINVAL; |
42f4e3c4 | 140 | |
542563ba LP |
141 | a->sockaddr.in6.sin6_family = AF_INET6; |
142 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
143 | a->sockaddr.in6.sin6_scope_id = idx; | |
83c60c9f | 144 | a->sockaddr.in6.sin6_addr = in6addr_any; |
542563ba LP |
145 | a->size = sizeof(struct sockaddr_in6); |
146 | } | |
42f4e3c4 LP |
147 | } else { |
148 | ||
149 | /* Just a port */ | |
5198dabc LP |
150 | r = safe_atou(s, &u); |
151 | if (r < 0) | |
42f4e3c4 LP |
152 | return r; |
153 | ||
154 | if (u <= 0 || u > 0xFFFF) | |
155 | return -EINVAL; | |
156 | ||
5bfcc1c6 FF |
157 | if (socket_ipv6_is_supported()) { |
158 | a->sockaddr.in6.sin6_family = AF_INET6; | |
159 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
160 | a->sockaddr.in6.sin6_addr = in6addr_any; | |
161 | a->size = sizeof(struct sockaddr_in6); | |
162 | } else { | |
4d49b48c LP |
163 | a->sockaddr.in.sin_family = AF_INET; |
164 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
165 | a->sockaddr.in.sin_addr.s_addr = INADDR_ANY; | |
5bfcc1c6 FF |
166 | a->size = sizeof(struct sockaddr_in); |
167 | } | |
42f4e3c4 LP |
168 | } |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
7693146d LP |
174 | int socket_address_parse_and_warn(SocketAddress *a, const char *s) { |
175 | SocketAddress b; | |
176 | int r; | |
177 | ||
178 | /* Similar to socket_address_parse() but warns for IPv6 sockets when we don't support them. */ | |
179 | ||
180 | r = socket_address_parse(&b, s); | |
181 | if (r < 0) | |
182 | return r; | |
183 | ||
184 | if (!socket_ipv6_is_supported() && b.sockaddr.sa.sa_family == AF_INET6) { | |
185 | log_warning("Binding to IPv6 address not available since kernel does not support IPv6."); | |
186 | return -EAFNOSUPPORT; | |
187 | } | |
188 | ||
189 | *a = b; | |
190 | return 0; | |
191 | } | |
192 | ||
7a22745a LP |
193 | int socket_address_parse_netlink(SocketAddress *a, const char *s) { |
194 | int family; | |
195 | unsigned group = 0; | |
f8b69d1d | 196 | _cleanup_free_ char *sfamily = NULL; |
7a22745a LP |
197 | assert(a); |
198 | assert(s); | |
199 | ||
200 | zero(*a); | |
201 | a->type = SOCK_RAW; | |
202 | ||
203 | errno = 0; | |
204 | if (sscanf(s, "%ms %u", &sfamily, &group) < 1) | |
bcb161b0 | 205 | return errno > 0 ? -errno : -EINVAL; |
7a22745a | 206 | |
f8b69d1d MS |
207 | family = netlink_family_from_string(sfamily); |
208 | if (family < 0) | |
209 | return -EINVAL; | |
7a22745a LP |
210 | |
211 | a->sockaddr.nl.nl_family = AF_NETLINK; | |
212 | a->sockaddr.nl.nl_groups = group; | |
213 | ||
214 | a->type = SOCK_RAW; | |
215 | a->size = sizeof(struct sockaddr_nl); | |
216 | a->protocol = family; | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
542563ba | 221 | int socket_address_verify(const SocketAddress *a) { |
42f4e3c4 LP |
222 | assert(a); |
223 | ||
542563ba | 224 | switch (socket_address_family(a)) { |
42f4e3c4 | 225 | |
7a22745a LP |
226 | case AF_INET: |
227 | if (a->size != sizeof(struct sockaddr_in)) | |
228 | return -EINVAL; | |
42f4e3c4 | 229 | |
4d49b48c | 230 | if (a->sockaddr.in.sin_port == 0) |
7a22745a | 231 | return -EINVAL; |
42f4e3c4 | 232 | |
7a22745a LP |
233 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
234 | return -EINVAL; | |
42f4e3c4 | 235 | |
7a22745a LP |
236 | return 0; |
237 | ||
238 | case AF_INET6: | |
239 | if (a->size != sizeof(struct sockaddr_in6)) | |
240 | return -EINVAL; | |
42f4e3c4 | 241 | |
7a22745a LP |
242 | if (a->sockaddr.in6.sin6_port == 0) |
243 | return -EINVAL; | |
42f4e3c4 | 244 | |
7a22745a LP |
245 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
246 | return -EINVAL; | |
42f4e3c4 | 247 | |
7a22745a | 248 | return 0; |
42f4e3c4 | 249 | |
7a22745a LP |
250 | case AF_UNIX: |
251 | if (a->size < offsetof(struct sockaddr_un, sun_path)) | |
252 | return -EINVAL; | |
42f4e3c4 | 253 | |
7a22745a | 254 | if (a->size > offsetof(struct sockaddr_un, sun_path)) { |
42f4e3c4 | 255 | |
7a22745a LP |
256 | if (a->sockaddr.un.sun_path[0] != 0) { |
257 | char *e; | |
258 | ||
259 | /* path */ | |
4d49b48c LP |
260 | e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path)); |
261 | if (!e) | |
7a22745a LP |
262 | return -EINVAL; |
263 | ||
264 | if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1) | |
265 | return -EINVAL; | |
42f4e3c4 | 266 | } |
7a22745a | 267 | } |
42f4e3c4 | 268 | |
5a2b80ce | 269 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM && a->type != SOCK_SEQPACKET) |
7a22745a | 270 | return -EINVAL; |
42f4e3c4 | 271 | |
7a22745a LP |
272 | return 0; |
273 | ||
274 | case AF_NETLINK: | |
275 | ||
276 | if (a->size != sizeof(struct sockaddr_nl)) | |
277 | return -EINVAL; | |
278 | ||
279 | if (a->type != SOCK_RAW && a->type != SOCK_DGRAM) | |
280 | return -EINVAL; | |
281 | ||
282 | return 0; | |
283 | ||
284 | default: | |
285 | return -EAFNOSUPPORT; | |
42f4e3c4 LP |
286 | } |
287 | } | |
288 | ||
4d49b48c | 289 | int socket_address_print(const SocketAddress *a, char **ret) { |
42f4e3c4 | 290 | int r; |
4d49b48c | 291 | |
42f4e3c4 | 292 | assert(a); |
4d49b48c | 293 | assert(ret); |
42f4e3c4 | 294 | |
4d49b48c LP |
295 | r = socket_address_verify(a); |
296 | if (r < 0) | |
42f4e3c4 LP |
297 | return r; |
298 | ||
4d49b48c | 299 | if (socket_address_family(a) == AF_NETLINK) { |
7fd1b19b | 300 | _cleanup_free_ char *sfamily = NULL; |
7a22745a | 301 | |
f8b69d1d | 302 | r = netlink_family_to_string_alloc(a->protocol, &sfamily); |
7a22745a | 303 | if (r < 0) |
f8b69d1d | 304 | return r; |
4d49b48c LP |
305 | |
306 | r = asprintf(ret, "%s %u", sfamily, a->sockaddr.nl.nl_groups); | |
8520cfa5 MS |
307 | if (r < 0) |
308 | return -ENOMEM; | |
7a22745a LP |
309 | |
310 | return 0; | |
311 | } | |
312 | ||
3b1c5241 | 313 | return sockaddr_pretty(&a->sockaddr.sa, a->size, false, true, ret); |
42f4e3c4 LP |
314 | } |
315 | ||
4f2d528d LP |
316 | bool socket_address_can_accept(const SocketAddress *a) { |
317 | assert(a); | |
318 | ||
319 | return | |
320 | a->type == SOCK_STREAM || | |
321 | a->type == SOCK_SEQPACKET; | |
322 | } | |
a16e1123 LP |
323 | |
324 | bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) { | |
325 | assert(a); | |
326 | assert(b); | |
327 | ||
328 | /* Invalid addresses are unequal to all */ | |
329 | if (socket_address_verify(a) < 0 || | |
330 | socket_address_verify(b) < 0) | |
331 | return false; | |
332 | ||
333 | if (a->type != b->type) | |
334 | return false; | |
335 | ||
a16e1123 LP |
336 | if (socket_address_family(a) != socket_address_family(b)) |
337 | return false; | |
338 | ||
339 | switch (socket_address_family(a)) { | |
340 | ||
341 | case AF_INET: | |
4d49b48c | 342 | if (a->sockaddr.in.sin_addr.s_addr != b->sockaddr.in.sin_addr.s_addr) |
a16e1123 LP |
343 | return false; |
344 | ||
4d49b48c | 345 | if (a->sockaddr.in.sin_port != b->sockaddr.in.sin_port) |
a16e1123 LP |
346 | return false; |
347 | ||
348 | break; | |
349 | ||
350 | case AF_INET6: | |
351 | if (memcmp(&a->sockaddr.in6.sin6_addr, &b->sockaddr.in6.sin6_addr, sizeof(a->sockaddr.in6.sin6_addr)) != 0) | |
352 | return false; | |
353 | ||
354 | if (a->sockaddr.in6.sin6_port != b->sockaddr.in6.sin6_port) | |
355 | return false; | |
356 | ||
357 | break; | |
358 | ||
359 | case AF_UNIX: | |
710708a5 MS |
360 | if (a->size <= offsetof(struct sockaddr_un, sun_path) || |
361 | b->size <= offsetof(struct sockaddr_un, sun_path)) | |
362 | return false; | |
363 | ||
a16e1123 LP |
364 | if ((a->sockaddr.un.sun_path[0] == 0) != (b->sockaddr.un.sun_path[0] == 0)) |
365 | return false; | |
366 | ||
367 | if (a->sockaddr.un.sun_path[0]) { | |
c78e47a6 | 368 | if (!path_equal_or_files_same(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path)) |
a16e1123 LP |
369 | return false; |
370 | } else { | |
c78e47a6 MS |
371 | if (a->size != b->size) |
372 | return false; | |
373 | ||
b12c1e7c | 374 | if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0) |
a16e1123 LP |
375 | return false; |
376 | } | |
377 | ||
378 | break; | |
379 | ||
7a22745a | 380 | case AF_NETLINK: |
7a22745a LP |
381 | if (a->protocol != b->protocol) |
382 | return false; | |
383 | ||
384 | if (a->sockaddr.nl.nl_groups != b->sockaddr.nl.nl_groups) | |
385 | return false; | |
386 | ||
387 | break; | |
388 | ||
a16e1123 LP |
389 | default: |
390 | /* Cannot compare, so we assume the addresses are different */ | |
391 | return false; | |
392 | } | |
393 | ||
394 | return true; | |
395 | } | |
396 | ||
27ca8d7a | 397 | bool socket_address_is(const SocketAddress *a, const char *s, int type) { |
a16e1123 LP |
398 | struct SocketAddress b; |
399 | ||
400 | assert(a); | |
401 | assert(s); | |
402 | ||
403 | if (socket_address_parse(&b, s) < 0) | |
404 | return false; | |
405 | ||
27ca8d7a LP |
406 | b.type = type; |
407 | ||
a16e1123 | 408 | return socket_address_equal(a, &b); |
6e2ef85b LP |
409 | } |
410 | ||
7a22745a LP |
411 | bool socket_address_is_netlink(const SocketAddress *a, const char *s) { |
412 | struct SocketAddress b; | |
413 | ||
414 | assert(a); | |
415 | assert(s); | |
416 | ||
417 | if (socket_address_parse_netlink(&b, s) < 0) | |
418 | return false; | |
419 | ||
420 | return socket_address_equal(a, &b); | |
421 | } | |
422 | ||
a57f7e2c | 423 | const char* socket_address_get_path(const SocketAddress *a) { |
6e2ef85b LP |
424 | assert(a); |
425 | ||
426 | if (socket_address_family(a) != AF_UNIX) | |
a57f7e2c | 427 | return NULL; |
6e2ef85b LP |
428 | |
429 | if (a->sockaddr.un.sun_path[0] == 0) | |
a57f7e2c | 430 | return NULL; |
a16e1123 | 431 | |
a57f7e2c | 432 | return a->sockaddr.un.sun_path; |
a16e1123 | 433 | } |
c0120d99 | 434 | |
5bfcc1c6 | 435 | bool socket_ipv6_is_supported(void) { |
79a98c60 | 436 | _cleanup_free_ char *l = NULL; |
f89f1e8f AB |
437 | |
438 | if (access("/sys/module/ipv6", F_OK) != 0) | |
90ab5042 | 439 | return false; |
f89f1e8f AB |
440 | |
441 | /* If we can't check "disable" parameter, assume enabled */ | |
442 | if (read_one_line_file("/sys/module/ipv6/parameters/disable", &l) < 0) | |
90ab5042 | 443 | return true; |
f89f1e8f AB |
444 | |
445 | /* If module was loaded with disable=1 no IPv6 available */ | |
79a98c60 | 446 | return l[0] == '0'; |
5bfcc1c6 FF |
447 | } |
448 | ||
01e10de3 | 449 | bool socket_address_matches_fd(const SocketAddress *a, int fd) { |
dbafedac MS |
450 | SocketAddress b; |
451 | socklen_t solen; | |
01e10de3 LP |
452 | |
453 | assert(a); | |
454 | assert(fd >= 0); | |
455 | ||
dbafedac MS |
456 | b.size = sizeof(b.sockaddr); |
457 | if (getsockname(fd, &b.sockaddr.sa, &b.size) < 0) | |
01e10de3 LP |
458 | return false; |
459 | ||
dbafedac | 460 | if (b.sockaddr.sa.sa_family != a->sockaddr.sa.sa_family) |
01e10de3 LP |
461 | return false; |
462 | ||
dbafedac MS |
463 | solen = sizeof(b.type); |
464 | if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &b.type, &solen) < 0) | |
01e10de3 LP |
465 | return false; |
466 | ||
dbafedac | 467 | if (b.type != a->type) |
01e10de3 LP |
468 | return false; |
469 | ||
470 | if (a->protocol != 0) { | |
dbafedac MS |
471 | solen = sizeof(b.protocol); |
472 | if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &b.protocol, &solen) < 0) | |
01e10de3 LP |
473 | return false; |
474 | ||
dbafedac | 475 | if (b.protocol != a->protocol) |
01e10de3 LP |
476 | return false; |
477 | } | |
478 | ||
02233928 | 479 | return socket_address_equal(a, &b); |
01e10de3 LP |
480 | } |
481 | ||
3b1c5241 SL |
482 | int sockaddr_port(const struct sockaddr *_sa) { |
483 | union sockaddr_union *sa = (union sockaddr_union*) _sa; | |
484 | ||
485 | assert(sa); | |
486 | ||
487 | if (!IN_SET(sa->sa.sa_family, AF_INET, AF_INET6)) | |
488 | return -EAFNOSUPPORT; | |
489 | ||
490 | return ntohs(sa->sa.sa_family == AF_INET6 ? | |
491 | sa->in6.sin6_port : | |
492 | sa->in.sin_port); | |
493 | } | |
494 | ||
495 | int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret) { | |
4d49b48c | 496 | union sockaddr_union *sa = (union sockaddr_union*) _sa; |
8569a776 | 497 | char *p; |
fc25ad25 | 498 | int r; |
8569a776 | 499 | |
4d49b48c LP |
500 | assert(sa); |
501 | assert(salen >= sizeof(sa->sa.sa_family)); | |
8569a776 | 502 | |
4d49b48c | 503 | switch (sa->sa.sa_family) { |
8569a776 LP |
504 | |
505 | case AF_INET: { | |
506 | uint32_t a; | |
507 | ||
4d49b48c | 508 | a = ntohl(sa->in.sin_addr.s_addr); |
8569a776 | 509 | |
fc25ad25 ZJS |
510 | if (include_port) |
511 | r = asprintf(&p, | |
3b1c5241 SL |
512 | "%u.%u.%u.%u:%u", |
513 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, | |
fc25ad25 ZJS |
514 | ntohs(sa->in.sin_port)); |
515 | else | |
516 | r = asprintf(&p, | |
3b1c5241 | 517 | "%u.%u.%u.%u", |
fc25ad25 ZJS |
518 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF); |
519 | if (r < 0) | |
520 | return -ENOMEM; | |
8569a776 LP |
521 | break; |
522 | } | |
523 | ||
524 | case AF_INET6: { | |
525 | static const unsigned char ipv4_prefix[] = { | |
526 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF | |
527 | }; | |
528 | ||
fc25ad25 ZJS |
529 | if (translate_ipv6 && |
530 | memcmp(&sa->in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
4d49b48c | 531 | const uint8_t *a = sa->in6.sin6_addr.s6_addr+12; |
fc25ad25 ZJS |
532 | if (include_port) |
533 | r = asprintf(&p, | |
3b1c5241 SL |
534 | "%u.%u.%u.%u:%u", |
535 | a[0], a[1], a[2], a[3], | |
fc25ad25 ZJS |
536 | ntohs(sa->in6.sin6_port)); |
537 | else | |
538 | r = asprintf(&p, | |
3b1c5241 | 539 | "%u.%u.%u.%u", |
fc25ad25 ZJS |
540 | a[0], a[1], a[2], a[3]); |
541 | if (r < 0) | |
542 | return -ENOMEM; | |
8569a776 LP |
543 | } else { |
544 | char a[INET6_ADDRSTRLEN]; | |
545 | ||
3b1c5241 SL |
546 | inet_ntop(AF_INET6, &sa->in6.sin6_addr, a, sizeof(a)); |
547 | ||
548 | if (include_port) { | |
fc25ad25 | 549 | r = asprintf(&p, |
3b1c5241 SL |
550 | "[%s]:%u", |
551 | a, | |
fc25ad25 ZJS |
552 | ntohs(sa->in6.sin6_port)); |
553 | if (r < 0) | |
3b1c5241 SL |
554 | return -ENOMEM; |
555 | } else { | |
556 | p = strdup(a); | |
557 | if (!p) | |
558 | return -ENOMEM; | |
559 | } | |
8569a776 LP |
560 | } |
561 | ||
562 | break; | |
563 | } | |
564 | ||
4d49b48c LP |
565 | case AF_UNIX: |
566 | if (salen <= offsetof(struct sockaddr_un, sun_path)) { | |
567 | p = strdup("<unnamed>"); | |
568 | if (!p) | |
569 | return -ENOMEM; | |
8569a776 | 570 | |
4d49b48c LP |
571 | } else if (sa->un.sun_path[0] == 0) { |
572 | /* abstract */ | |
8569a776 | 573 | |
4d49b48c LP |
574 | /* FIXME: We assume we can print the |
575 | * socket path here and that it hasn't | |
576 | * more than one NUL byte. That is | |
577 | * actually an invalid assumption */ | |
578 | ||
579 | p = new(char, sizeof(sa->un.sun_path)+1); | |
580 | if (!p) | |
581 | return -ENOMEM; | |
582 | ||
583 | p[0] = '@'; | |
584 | memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1); | |
585 | p[sizeof(sa->un.sun_path)] = 0; | |
586 | ||
587 | } else { | |
588 | p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path)); | |
0810bc56 | 589 | if (!p) |
4d49b48c LP |
590 | return -ENOMEM; |
591 | } | |
8569a776 LP |
592 | |
593 | break; | |
8569a776 LP |
594 | |
595 | default: | |
15411c0c | 596 | return -EOPNOTSUPP; |
8569a776 LP |
597 | } |
598 | ||
4d49b48c | 599 | |
8569a776 LP |
600 | *ret = p; |
601 | return 0; | |
602 | } | |
603 | ||
4d49b48c LP |
604 | int getpeername_pretty(int fd, char **ret) { |
605 | union sockaddr_union sa; | |
b31f535c | 606 | socklen_t salen = sizeof(sa); |
eff05270 | 607 | int r; |
4d49b48c LP |
608 | |
609 | assert(fd >= 0); | |
610 | assert(ret); | |
611 | ||
4d49b48c LP |
612 | if (getpeername(fd, &sa.sa, &salen) < 0) |
613 | return -errno; | |
614 | ||
615 | if (sa.sa.sa_family == AF_UNIX) { | |
39883f62 | 616 | struct ucred ucred = {}; |
4d49b48c LP |
617 | |
618 | /* UNIX connection sockets are anonymous, so let's use | |
619 | * PID/UID as pretty credentials instead */ | |
620 | ||
eff05270 LP |
621 | r = getpeercred(fd, &ucred); |
622 | if (r < 0) | |
623 | return r; | |
4d49b48c | 624 | |
de0671ee | 625 | if (asprintf(ret, "PID "PID_FMT"/UID "UID_FMT, ucred.pid, ucred.uid) < 0) |
4d49b48c LP |
626 | return -ENOMEM; |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
631 | /* For remote sockets we translate IPv6 addresses back to IPv4 | |
632 | * if applicable, since that's nicer. */ | |
633 | ||
3b1c5241 | 634 | return sockaddr_pretty(&sa.sa, salen, true, true, ret); |
4d49b48c LP |
635 | } |
636 | ||
637 | int getsockname_pretty(int fd, char **ret) { | |
638 | union sockaddr_union sa; | |
b31f535c | 639 | socklen_t salen = sizeof(sa); |
4d49b48c LP |
640 | |
641 | assert(fd >= 0); | |
642 | assert(ret); | |
643 | ||
4d49b48c LP |
644 | if (getsockname(fd, &sa.sa, &salen) < 0) |
645 | return -errno; | |
646 | ||
647 | /* For local sockets we do not translate IPv6 addresses back | |
648 | * to IPv6 if applicable, since this is usually used for | |
649 | * listening sockets where the difference between IPv4 and | |
650 | * IPv6 matters. */ | |
651 | ||
3b1c5241 | 652 | return sockaddr_pretty(&sa.sa, salen, false, true, ret); |
4d49b48c LP |
653 | } |
654 | ||
b31f535c ZJS |
655 | int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret) { |
656 | int r; | |
657 | char host[NI_MAXHOST], *ret; | |
658 | ||
659 | assert(_ret); | |
660 | ||
661 | r = getnameinfo(&sa->sa, salen, host, sizeof(host), NULL, 0, | |
662 | NI_IDN|NI_IDN_USE_STD3_ASCII_RULES); | |
663 | if (r != 0) { | |
b31f535c ZJS |
664 | int saved_errno = errno; |
665 | ||
3b1c5241 | 666 | r = sockaddr_pretty(&sa->sa, salen, true, true, &ret); |
f647962d | 667 | if (r < 0) |
1938ac51 | 668 | return r; |
b31f535c | 669 | |
279d3c9c | 670 | log_debug_errno(saved_errno, "getnameinfo(%s) failed: %m", ret); |
cb651834 ZJS |
671 | } else { |
672 | ret = strdup(host); | |
673 | if (!ret) | |
1938ac51 | 674 | return -ENOMEM; |
cb651834 | 675 | } |
b31f535c ZJS |
676 | |
677 | *_ret = ret; | |
678 | return 0; | |
679 | } | |
680 | ||
681 | int getnameinfo_pretty(int fd, char **ret) { | |
682 | union sockaddr_union sa; | |
683 | socklen_t salen = sizeof(sa); | |
684 | ||
685 | assert(fd >= 0); | |
686 | assert(ret); | |
687 | ||
4a62c710 | 688 | if (getsockname(fd, &sa.sa, &salen) < 0) |
1938ac51 | 689 | return -errno; |
b31f535c ZJS |
690 | |
691 | return socknameinfo_pretty(&sa, salen, ret); | |
692 | } | |
693 | ||
bd1fe7c7 LP |
694 | int socket_address_unlink(SocketAddress *a) { |
695 | assert(a); | |
696 | ||
697 | if (socket_address_family(a) != AF_UNIX) | |
698 | return 0; | |
699 | ||
700 | if (a->sockaddr.un.sun_path[0] == 0) | |
701 | return 0; | |
702 | ||
703 | if (unlink(a->sockaddr.un.sun_path) < 0) | |
704 | return -errno; | |
705 | ||
706 | return 1; | |
707 | } | |
708 | ||
7a22745a LP |
709 | static const char* const netlink_family_table[] = { |
710 | [NETLINK_ROUTE] = "route", | |
711 | [NETLINK_FIREWALL] = "firewall", | |
712 | [NETLINK_INET_DIAG] = "inet-diag", | |
713 | [NETLINK_NFLOG] = "nflog", | |
714 | [NETLINK_XFRM] = "xfrm", | |
715 | [NETLINK_SELINUX] = "selinux", | |
716 | [NETLINK_ISCSI] = "iscsi", | |
717 | [NETLINK_AUDIT] = "audit", | |
718 | [NETLINK_FIB_LOOKUP] = "fib-lookup", | |
719 | [NETLINK_CONNECTOR] = "connector", | |
720 | [NETLINK_NETFILTER] = "netfilter", | |
721 | [NETLINK_IP6_FW] = "ip6-fw", | |
722 | [NETLINK_DNRTMSG] = "dnrtmsg", | |
723 | [NETLINK_KOBJECT_UEVENT] = "kobject-uevent", | |
724 | [NETLINK_GENERIC] = "generic", | |
725 | [NETLINK_SCSITRANSPORT] = "scsitransport", | |
726 | [NETLINK_ECRYPTFS] = "ecryptfs" | |
727 | }; | |
728 | ||
f8b69d1d | 729 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(netlink_family, int, INT_MAX); |
7a22745a | 730 | |
c0120d99 LP |
731 | static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = { |
732 | [SOCKET_ADDRESS_DEFAULT] = "default", | |
733 | [SOCKET_ADDRESS_BOTH] = "both", | |
734 | [SOCKET_ADDRESS_IPV6_ONLY] = "ipv6-only" | |
735 | }; | |
736 | ||
737 | DEFINE_STRING_TABLE_LOOKUP(socket_address_bind_ipv6_only, SocketAddressBindIPv6Only); | |
f01e5736 LP |
738 | |
739 | bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b) { | |
740 | assert(a); | |
741 | assert(b); | |
742 | ||
743 | if (a->sa.sa_family != b->sa.sa_family) | |
744 | return false; | |
745 | ||
746 | if (a->sa.sa_family == AF_INET) | |
747 | return a->in.sin_addr.s_addr == b->in.sin_addr.s_addr; | |
748 | ||
749 | if (a->sa.sa_family == AF_INET6) | |
750 | return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr)) == 0; | |
751 | ||
752 | return false; | |
753 | } | |
2583fbea LP |
754 | |
755 | int fd_inc_sndbuf(int fd, size_t n) { | |
756 | int r, value; | |
757 | socklen_t l = sizeof(value); | |
758 | ||
759 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
760 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) | |
761 | return 0; | |
762 | ||
763 | /* If we have the privileges we will ignore the kernel limit. */ | |
764 | ||
765 | value = (int) n; | |
766 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) | |
767 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
768 | return -errno; | |
769 | ||
770 | return 1; | |
771 | } | |
772 | ||
773 | int fd_inc_rcvbuf(int fd, size_t n) { | |
774 | int r, value; | |
775 | socklen_t l = sizeof(value); | |
776 | ||
777 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
778 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) | |
779 | return 0; | |
780 | ||
781 | /* If we have the privileges we will ignore the kernel limit. */ | |
782 | ||
783 | value = (int) n; | |
784 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
785 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
786 | return -errno; | |
787 | return 1; | |
788 | } | |
789 | ||
790 | static const char* const ip_tos_table[] = { | |
791 | [IPTOS_LOWDELAY] = "low-delay", | |
792 | [IPTOS_THROUGHPUT] = "throughput", | |
793 | [IPTOS_RELIABILITY] = "reliability", | |
794 | [IPTOS_LOWCOST] = "low-cost", | |
795 | }; | |
796 | ||
797 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); | |
798 | ||
799 | int getpeercred(int fd, struct ucred *ucred) { | |
800 | socklen_t n = sizeof(struct ucred); | |
801 | struct ucred u; | |
802 | int r; | |
803 | ||
804 | assert(fd >= 0); | |
805 | assert(ucred); | |
806 | ||
807 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
808 | if (r < 0) | |
809 | return -errno; | |
810 | ||
811 | if (n != sizeof(struct ucred)) | |
812 | return -EIO; | |
813 | ||
814 | /* Check if the data is actually useful and not suppressed due | |
815 | * to namespacing issues */ | |
816 | if (u.pid <= 0) | |
817 | return -ENODATA; | |
818 | if (u.uid == UID_INVALID) | |
819 | return -ENODATA; | |
820 | if (u.gid == GID_INVALID) | |
821 | return -ENODATA; | |
822 | ||
823 | *ucred = u; | |
824 | return 0; | |
825 | } | |
826 | ||
827 | int getpeersec(int fd, char **ret) { | |
828 | socklen_t n = 64; | |
829 | char *s; | |
830 | int r; | |
831 | ||
832 | assert(fd >= 0); | |
833 | assert(ret); | |
834 | ||
835 | s = new0(char, n); | |
836 | if (!s) | |
837 | return -ENOMEM; | |
838 | ||
839 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
840 | if (r < 0) { | |
841 | free(s); | |
842 | ||
843 | if (errno != ERANGE) | |
844 | return -errno; | |
845 | ||
846 | s = new0(char, n); | |
847 | if (!s) | |
848 | return -ENOMEM; | |
849 | ||
850 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
851 | if (r < 0) { | |
852 | free(s); | |
853 | return -errno; | |
854 | } | |
855 | } | |
856 | ||
857 | if (isempty(s)) { | |
858 | free(s); | |
859 | return -EOPNOTSUPP; | |
860 | } | |
861 | ||
862 | *ret = s; | |
863 | return 0; | |
864 | } | |
865 | ||
866 | int send_one_fd(int transport_fd, int fd, int flags) { | |
867 | union { | |
868 | struct cmsghdr cmsghdr; | |
869 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
870 | } control = {}; | |
871 | struct msghdr mh = { | |
872 | .msg_control = &control, | |
873 | .msg_controllen = sizeof(control), | |
874 | }; | |
875 | struct cmsghdr *cmsg; | |
876 | ||
877 | assert(transport_fd >= 0); | |
878 | assert(fd >= 0); | |
879 | ||
880 | cmsg = CMSG_FIRSTHDR(&mh); | |
881 | cmsg->cmsg_level = SOL_SOCKET; | |
882 | cmsg->cmsg_type = SCM_RIGHTS; | |
883 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
884 | memcpy(CMSG_DATA(cmsg), &fd, sizeof(int)); | |
885 | ||
886 | mh.msg_controllen = CMSG_SPACE(sizeof(int)); | |
887 | if (sendmsg(transport_fd, &mh, MSG_NOSIGNAL | flags) < 0) | |
888 | return -errno; | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
893 | int receive_one_fd(int transport_fd, int flags) { | |
894 | union { | |
895 | struct cmsghdr cmsghdr; | |
896 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
897 | } control = {}; | |
898 | struct msghdr mh = { | |
899 | .msg_control = &control, | |
900 | .msg_controllen = sizeof(control), | |
901 | }; | |
902 | struct cmsghdr *cmsg, *found = NULL; | |
903 | ||
904 | assert(transport_fd >= 0); | |
905 | ||
906 | /* | |
907 | * Receive a single FD via @transport_fd. We don't care for | |
908 | * the transport-type. We retrieve a single FD at most, so for | |
909 | * packet-based transports, the caller must ensure to send | |
910 | * only a single FD per packet. This is best used in | |
911 | * combination with send_one_fd(). | |
912 | */ | |
913 | ||
914 | if (recvmsg(transport_fd, &mh, MSG_NOSIGNAL | MSG_CMSG_CLOEXEC | flags) < 0) | |
915 | return -errno; | |
916 | ||
917 | CMSG_FOREACH(cmsg, &mh) { | |
918 | if (cmsg->cmsg_level == SOL_SOCKET && | |
919 | cmsg->cmsg_type == SCM_RIGHTS && | |
920 | cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { | |
921 | assert(!found); | |
922 | found = cmsg; | |
923 | break; | |
924 | } | |
925 | } | |
926 | ||
927 | if (!found) { | |
928 | cmsg_close_all(&mh); | |
929 | return -EIO; | |
930 | } | |
931 | ||
932 | return *(int*) CMSG_DATA(found); | |
933 | } |