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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
65f568bb TG |
2 | |
3 | #include <netinet/in.h> | |
65f568bb TG |
4 | #include <stdbool.h> |
5 | #include <unistd.h> | |
6 | ||
07630cea LP |
7 | #include "sd-netlink.h" |
8 | ||
b5efdb8a | 9 | #include "alloc-util.h" |
f97b34a6 | 10 | #include "format-util.h" |
d5eff740 | 11 | #include "missing.h" |
1c4baffc TG |
12 | #include "netlink-internal.h" |
13 | #include "netlink-types.h" | |
07630cea LP |
14 | #include "netlink-util.h" |
15 | #include "refcnt.h" | |
16 | #include "socket-util.h" | |
17 | #include "util.h" | |
65f568bb | 18 | |
f663aeb8 | 19 | #define GET_CONTAINER(m, i) ((i) < (m)->n_containers ? (struct rtattr*)((uint8_t*)(m)->hdr + (m)->containers[i].offset) : NULL) |
313cefa1 | 20 | #define PUSH_CONTAINER(m, new) (m)->container_offsets[(m)->n_containers++] = (uint8_t*)(new) - (uint8_t*)(m)->hdr; |
4ebe732c | 21 | |
0a2478a9 | 22 | #define RTA_TYPE(rta) ((rta)->rta_type & NLA_TYPE_MASK) |
4c641e99 | 23 | #define RTA_FLAGS(rta) ((rta)->rta_type & ~NLA_TYPE_MASK) |
0a2478a9 | 24 | |
89489ef7 | 25 | int message_new_empty(sd_netlink *rtnl, sd_netlink_message **ret) { |
1c4baffc | 26 | sd_netlink_message *m; |
65f568bb TG |
27 | |
28 | assert_return(ret, -EINVAL); | |
65f568bb | 29 | |
f131770b | 30 | /* Note that 'rtnl' is currently unused, if we start using it internally |
8c578303 | 31 | we must take care to avoid problems due to mutual references between |
ff9b60f3 | 32 | buses and their queued messages. See sd-bus. |
8c578303 TG |
33 | */ |
34 | ||
1c4baffc | 35 | m = new0(sd_netlink_message, 1); |
65f568bb TG |
36 | if (!m) |
37 | return -ENOMEM; | |
38 | ||
65f568bb | 39 | m->n_ref = REFCNT_INIT; |
05d0c2e3 | 40 | m->protocol = rtnl->protocol; |
65f568bb TG |
41 | m->sealed = false; |
42 | ||
43 | *ret = m; | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
1c4baffc | 48 | int message_new(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t type) { |
4afd3348 | 49 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
d8e538ec | 50 | const NLType *nl_type; |
05d0c2e3 | 51 | const NLTypeSystem *type_system_root; |
d8e538ec TG |
52 | size_t size; |
53 | int r; | |
54 | ||
05d0c2e3 JT |
55 | assert_return(rtnl, -EINVAL); |
56 | ||
57 | type_system_root = type_system_get_root(rtnl->protocol); | |
58 | ||
59 | r = type_system_get_type(type_system_root, &nl_type, type); | |
d8e538ec TG |
60 | if (r < 0) |
61 | return r; | |
62 | ||
12b7dff4 DH |
63 | if (type_get_type(nl_type) != NETLINK_TYPE_NESTED) |
64 | return -EINVAL; | |
65 | ||
1b89cf56 | 66 | r = message_new_empty(rtnl, &m); |
d8e538ec TG |
67 | if (r < 0) |
68 | return r; | |
69 | ||
817d1cd8 | 70 | size = NLMSG_SPACE(type_get_size(nl_type)); |
1b89cf56 TG |
71 | |
72 | assert(size >= sizeof(struct nlmsghdr)); | |
73 | m->hdr = malloc0(size); | |
74 | if (!m->hdr) | |
75 | return -ENOMEM; | |
76 | ||
77 | m->hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
78 | ||
f663aeb8 | 79 | type_get_type_system(nl_type, &m->containers[0].type_system); |
1b89cf56 TG |
80 | m->hdr->nlmsg_len = size; |
81 | m->hdr->nlmsg_type = type; | |
82 | ||
1cc6c93a | 83 | *ret = TAKE_PTR(m); |
d8e538ec TG |
84 | |
85 | return 0; | |
86 | } | |
87 | ||
1c4baffc | 88 | int sd_netlink_message_request_dump(sd_netlink_message *m, int dump) { |
6e20c8f8 TG |
89 | assert_return(m, -EINVAL); |
90 | assert_return(m->hdr, -EINVAL); | |
bce67bbe SS |
91 | |
92 | assert_return(IN_SET(m->hdr->nlmsg_type, RTM_GETLINK, RTM_GETADDR, RTM_GETROUTE, RTM_GETNEIGH, RTM_GETRULE, RTM_GETADDRLABEL), -EINVAL); | |
6e20c8f8 | 93 | |
5883ff60 | 94 | SET_FLAG(m->hdr->nlmsg_flags, NLM_F_DUMP, dump); |
6e20c8f8 TG |
95 | |
96 | return 0; | |
97 | } | |
98 | ||
1c71f7f3 | 99 | DEFINE_ATOMIC_REF_FUNC(sd_netlink_message, sd_netlink_message); |
65f568bb | 100 | |
1c4baffc | 101 | sd_netlink_message *sd_netlink_message_unref(sd_netlink_message *m) { |
82e4eda6 DH |
102 | sd_netlink_message *t; |
103 | ||
104 | while (m && REFCNT_DEC(m->n_ref) == 0) { | |
3dd215e0 TG |
105 | unsigned i; |
106 | ||
65f568bb | 107 | free(m->hdr); |
3dd215e0 | 108 | |
9f5bbfe3 | 109 | for (i = 0; i <= m->n_containers; i++) |
f663aeb8 | 110 | free(m->containers[i].attributes); |
3dd215e0 | 111 | |
82e4eda6 DH |
112 | t = m; |
113 | m = m->next; | |
114 | free(t); | |
65f568bb TG |
115 | } |
116 | ||
117 | return NULL; | |
118 | } | |
119 | ||
1c4baffc | 120 | int sd_netlink_message_get_type(sd_netlink_message *m, uint16_t *type) { |
65f568bb TG |
121 | assert_return(m, -EINVAL); |
122 | assert_return(type, -EINVAL); | |
123 | ||
124 | *type = m->hdr->nlmsg_type; | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
c06cb593 SS |
129 | int sd_netlink_message_set_flags(sd_netlink_message *m, uint16_t flags) { |
130 | assert_return(m, -EINVAL); | |
131 | assert_return(flags, -EINVAL); | |
132 | ||
133 | m->hdr->nlmsg_flags = flags; | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
1c4baffc | 138 | int sd_netlink_message_is_broadcast(sd_netlink_message *m) { |
1f0db3ed TG |
139 | assert_return(m, -EINVAL); |
140 | ||
3f42446d | 141 | return m->broadcast; |
1f0db3ed TG |
142 | } |
143 | ||
4ebe732c ZJS |
144 | /* If successful the updated message will be correctly aligned, if |
145 | unsuccessful the old message is untouched. */ | |
1c4baffc | 146 | static int add_rtattr(sd_netlink_message *m, unsigned short type, const void *data, size_t data_length) { |
7ca1d319 TG |
147 | uint32_t rta_length; |
148 | size_t message_length, padding_length; | |
65f568bb TG |
149 | struct nlmsghdr *new_hdr; |
150 | struct rtattr *rta; | |
8e337e64 | 151 | char *padding; |
5a081409 | 152 | unsigned i; |
7ca1d319 | 153 | int offset; |
65f568bb | 154 | |
33125ac5 TG |
155 | assert(m); |
156 | assert(m->hdr); | |
e5c4350b | 157 | assert(!m->sealed); |
33125ac5 | 158 | assert(NLMSG_ALIGN(m->hdr->nlmsg_len) == m->hdr->nlmsg_len); |
7ca1d319 TG |
159 | assert(!data || data_length); |
160 | ||
161 | /* get offset of the new attribute */ | |
162 | offset = m->hdr->nlmsg_len; | |
65f568bb | 163 | |
8e337e64 | 164 | /* get the size of the new rta attribute (with padding at the end) */ |
65f568bb | 165 | rta_length = RTA_LENGTH(data_length); |
4ebe732c ZJS |
166 | |
167 | /* get the new message size (with padding at the end) */ | |
7ca1d319 | 168 | message_length = offset + RTA_ALIGN(rta_length); |
65f568bb | 169 | |
05d0c2e3 JT |
170 | /* buffer should be smaller than both one page or 8K to be accepted by the kernel */ |
171 | if (message_length > MIN(page_size(), 8192UL)) | |
172 | return -ENOBUFS; | |
173 | ||
65f568bb TG |
174 | /* realloc to fit the new attribute */ |
175 | new_hdr = realloc(m->hdr, message_length); | |
176 | if (!new_hdr) | |
177 | return -ENOMEM; | |
178 | m->hdr = new_hdr; | |
179 | ||
180 | /* get pointer to the attribute we are about to add */ | |
7ca1d319 | 181 | rta = (struct rtattr *) ((uint8_t *) m->hdr + offset); |
65f568bb | 182 | |
5a081409 TG |
183 | /* if we are inside containers, extend them */ |
184 | for (i = 0; i < m->n_containers; i++) | |
7ca1d319 | 185 | GET_CONTAINER(m, i)->rta_len += message_length - offset; |
33125ac5 | 186 | |
65f568bb TG |
187 | /* fill in the attribute */ |
188 | rta->rta_type = type; | |
189 | rta->rta_len = rta_length; | |
7ca1d319 | 190 | if (data) |
33125ac5 TG |
191 | /* we don't deal with the case where the user lies about the type |
192 | * and gives us too little data (so don't do that) | |
7ca1d319 | 193 | */ |
33125ac5 | 194 | padding = mempcpy(RTA_DATA(rta), data, data_length); |
b8cc01a2 SS |
195 | |
196 | else | |
7ca1d319 TG |
197 | /* if no data was passed, make sure we still initialize the padding |
198 | note that we can have data_length > 0 (used by some containers) */ | |
199 | padding = RTA_DATA(rta); | |
65f568bb | 200 | |
7ca1d319 TG |
201 | /* make sure also the padding at the end of the message is initialized */ |
202 | padding_length = (uint8_t*)m->hdr + message_length - (uint8_t*)padding; | |
203 | memzero(padding, padding_length); | |
204 | ||
4ebe732c ZJS |
205 | /* update message size */ |
206 | m->hdr->nlmsg_len = message_length; | |
207 | ||
7ca1d319 | 208 | return offset; |
65f568bb TG |
209 | } |
210 | ||
6c14ad61 | 211 | static int message_attribute_has_type(sd_netlink_message *m, size_t *out_size, uint16_t attribute_type, uint16_t data_type) { |
d8e538ec TG |
212 | const NLType *type; |
213 | int r; | |
214 | ||
6c14ad61 DH |
215 | assert(m); |
216 | ||
f663aeb8 | 217 | r = type_system_get_type(m->containers[m->n_containers].type_system, &type, attribute_type); |
d8e538ec TG |
218 | if (r < 0) |
219 | return r; | |
220 | ||
817d1cd8 | 221 | if (type_get_type(type) != data_type) |
d8e538ec TG |
222 | return -EINVAL; |
223 | ||
6c14ad61 DH |
224 | if (out_size) |
225 | *out_size = type_get_size(type); | |
226 | return 0; | |
d8e538ec TG |
227 | } |
228 | ||
1c4baffc | 229 | int sd_netlink_message_append_string(sd_netlink_message *m, unsigned short type, const char *data) { |
d8e538ec | 230 | size_t length, size; |
0a0dc69b | 231 | int r; |
65f568bb TG |
232 | |
233 | assert_return(m, -EINVAL); | |
e5c4350b | 234 | assert_return(!m->sealed, -EPERM); |
65f568bb TG |
235 | assert_return(data, -EINVAL); |
236 | ||
6c14ad61 | 237 | r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_STRING); |
0a0dc69b TG |
238 | if (r < 0) |
239 | return r; | |
65f568bb | 240 | |
d8e538ec | 241 | if (size) { |
3072eecf LP |
242 | length = strnlen(data, size+1); |
243 | if (length > size) | |
d8e538ec TG |
244 | return -EINVAL; |
245 | } else | |
246 | length = strlen(data); | |
33125ac5 | 247 | |
d8e538ec | 248 | r = add_rtattr(m, type, data, length + 1); |
0a0dc69b TG |
249 | if (r < 0) |
250 | return r; | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
c06aead0 SS |
255 | int sd_netlink_message_append_flag(sd_netlink_message *m, unsigned short type) { |
256 | size_t size; | |
257 | int r; | |
258 | ||
259 | assert_return(m, -EINVAL); | |
260 | assert_return(!m->sealed, -EPERM); | |
261 | ||
262 | r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_FLAG); | |
263 | if (r < 0) | |
264 | return r; | |
265 | ||
266 | r = add_rtattr(m, type, NULL, 0); | |
267 | if (r < 0) | |
268 | return r; | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
1c4baffc | 273 | int sd_netlink_message_append_u8(sd_netlink_message *m, unsigned short type, uint8_t data) { |
7b179640 SS |
274 | int r; |
275 | ||
276 | assert_return(m, -EINVAL); | |
277 | assert_return(!m->sealed, -EPERM); | |
278 | ||
6c14ad61 | 279 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U8); |
7b179640 SS |
280 | if (r < 0) |
281 | return r; | |
282 | ||
7b179640 SS |
283 | r = add_rtattr(m, type, &data, sizeof(uint8_t)); |
284 | if (r < 0) | |
285 | return r; | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
1c4baffc | 290 | int sd_netlink_message_append_u16(sd_netlink_message *m, unsigned short type, uint16_t data) { |
01b36069 TG |
291 | int r; |
292 | ||
293 | assert_return(m, -EINVAL); | |
e5c4350b | 294 | assert_return(!m->sealed, -EPERM); |
01b36069 | 295 | |
6c14ad61 | 296 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U16); |
01b36069 TG |
297 | if (r < 0) |
298 | return r; | |
299 | ||
01b36069 TG |
300 | r = add_rtattr(m, type, &data, sizeof(uint16_t)); |
301 | if (r < 0) | |
302 | return r; | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
1c4baffc | 307 | int sd_netlink_message_append_u32(sd_netlink_message *m, unsigned short type, uint32_t data) { |
0a0dc69b TG |
308 | int r; |
309 | ||
310 | assert_return(m, -EINVAL); | |
e5c4350b | 311 | assert_return(!m->sealed, -EPERM); |
0a0dc69b | 312 | |
6c14ad61 | 313 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U32); |
0a0dc69b TG |
314 | if (r < 0) |
315 | return r; | |
316 | ||
4d47756b | 317 | r = add_rtattr(m, type, &data, sizeof(uint32_t)); |
0a0dc69b TG |
318 | if (r < 0) |
319 | return r; | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
17af840b SS |
324 | int sd_netlink_message_append_data(sd_netlink_message *m, unsigned short type, const void *data, size_t len) { |
325 | int r; | |
326 | ||
327 | assert_return(m, -EINVAL); | |
328 | assert_return(!m->sealed, -EPERM); | |
329 | ||
b8cc01a2 | 330 | r = add_rtattr(m, type, data, len); |
17af840b SS |
331 | if (r < 0) |
332 | return r; | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
67b19a49 | 337 | int netlink_message_append_in_addr_union(sd_netlink_message *m, unsigned short type, int family, const union in_addr_union *data) { |
0a0dc69b TG |
338 | int r; |
339 | ||
340 | assert_return(m, -EINVAL); | |
e5c4350b | 341 | assert_return(!m->sealed, -EPERM); |
0a0dc69b | 342 | assert_return(data, -EINVAL); |
67b19a49 | 343 | assert_return(IN_SET(family, AF_INET, AF_INET6), -EINVAL); |
0a0dc69b | 344 | |
6c14ad61 | 345 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR); |
0a0dc69b TG |
346 | if (r < 0) |
347 | return r; | |
348 | ||
67b19a49 | 349 | r = add_rtattr(m, type, data, FAMILY_ADDRESS_SIZE(family)); |
0a0dc69b TG |
350 | if (r < 0) |
351 | return r; | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
67b19a49 YW |
356 | int sd_netlink_message_append_in_addr(sd_netlink_message *m, unsigned short type, const struct in_addr *data) { |
357 | return netlink_message_append_in_addr_union(m, type, AF_INET, (const union in_addr_union *) data); | |
358 | } | |
abd48ec8 | 359 | |
67b19a49 YW |
360 | int sd_netlink_message_append_in6_addr(sd_netlink_message *m, unsigned short type, const struct in6_addr *data) { |
361 | return netlink_message_append_in_addr_union(m, type, AF_INET6, (const union in_addr_union *) data); | |
abd48ec8 YW |
362 | } |
363 | ||
67b19a49 | 364 | int netlink_message_append_sockaddr_union(sd_netlink_message *m, unsigned short type, const union sockaddr_union *data) { |
abd48ec8 YW |
365 | int r; |
366 | ||
367 | assert_return(m, -EINVAL); | |
368 | assert_return(!m->sealed, -EPERM); | |
369 | assert_return(data, -EINVAL); | |
67b19a49 | 370 | assert_return(IN_SET(data->sa.sa_family, AF_INET, AF_INET6), -EINVAL); |
abd48ec8 YW |
371 | |
372 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_SOCKADDR); | |
373 | if (r < 0) | |
374 | return r; | |
375 | ||
67b19a49 | 376 | r = add_rtattr(m, type, data, data->sa.sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6)); |
abd48ec8 YW |
377 | if (r < 0) |
378 | return r; | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
67b19a49 YW |
383 | int sd_netlink_message_append_sockaddr_in(sd_netlink_message *m, unsigned short type, const struct sockaddr_in *data) { |
384 | return netlink_message_append_sockaddr_union(m, type, (const union sockaddr_union *) data); | |
385 | } | |
0a0dc69b | 386 | |
67b19a49 YW |
387 | int sd_netlink_message_append_sockaddr_in6(sd_netlink_message *m, unsigned short type, const struct sockaddr_in6 *data) { |
388 | return netlink_message_append_sockaddr_union(m, type, (const union sockaddr_union *) data); | |
0a0dc69b TG |
389 | } |
390 | ||
67b19a49 | 391 | |
1c4baffc | 392 | int sd_netlink_message_append_ether_addr(sd_netlink_message *m, unsigned short type, const struct ether_addr *data) { |
0a0dc69b TG |
393 | int r; |
394 | ||
395 | assert_return(m, -EINVAL); | |
e5c4350b | 396 | assert_return(!m->sealed, -EPERM); |
0a0dc69b TG |
397 | assert_return(data, -EINVAL); |
398 | ||
6c14ad61 | 399 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_ETHER_ADDR); |
d8e538ec TG |
400 | if (r < 0) |
401 | return r; | |
0a0dc69b | 402 | |
b9eaf3d1 | 403 | r = add_rtattr(m, type, data, ETH_ALEN); |
0a0dc69b TG |
404 | if (r < 0) |
405 | return r; | |
406 | ||
407 | return 0; | |
65f568bb TG |
408 | } |
409 | ||
1c4baffc | 410 | int sd_netlink_message_append_cache_info(sd_netlink_message *m, unsigned short type, const struct ifa_cacheinfo *info) { |
aba496a5 UTL |
411 | int r; |
412 | ||
413 | assert_return(m, -EINVAL); | |
414 | assert_return(!m->sealed, -EPERM); | |
415 | assert_return(info, -EINVAL); | |
416 | ||
6c14ad61 | 417 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_CACHE_INFO); |
aba496a5 UTL |
418 | if (r < 0) |
419 | return r; | |
420 | ||
421 | r = add_rtattr(m, type, info, sizeof(struct ifa_cacheinfo)); | |
422 | if (r < 0) | |
423 | return r; | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
1c4baffc | 428 | int sd_netlink_message_open_container(sd_netlink_message *m, unsigned short type) { |
d8e538ec TG |
429 | size_t size; |
430 | int r; | |
33125ac5 | 431 | |
65f568bb | 432 | assert_return(m, -EINVAL); |
e5c4350b | 433 | assert_return(!m->sealed, -EPERM); |
7ca1d319 | 434 | assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -ERANGE); |
33125ac5 | 435 | |
6c14ad61 | 436 | r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_NESTED); |
4af7b60d TG |
437 | if (r < 0) { |
438 | const NLTypeSystemUnion *type_system_union; | |
439 | int family; | |
440 | ||
6c14ad61 | 441 | r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_UNION); |
4af7b60d TG |
442 | if (r < 0) |
443 | return r; | |
4af7b60d | 444 | |
89489ef7 | 445 | r = sd_rtnl_message_get_family(m, &family); |
4af7b60d TG |
446 | if (r < 0) |
447 | return r; | |
448 | ||
f663aeb8 | 449 | r = type_system_get_type_system_union(m->containers[m->n_containers].type_system, &type_system_union, type); |
4af7b60d TG |
450 | if (r < 0) |
451 | return r; | |
452 | ||
453 | r = type_system_union_protocol_get_type_system(type_system_union, | |
f663aeb8 | 454 | &m->containers[m->n_containers + 1].type_system, |
4af7b60d TG |
455 | family); |
456 | if (r < 0) | |
457 | return r; | |
458 | } else { | |
f663aeb8 TG |
459 | r = type_system_get_type_system(m->containers[m->n_containers].type_system, |
460 | &m->containers[m->n_containers + 1].type_system, | |
4af7b60d TG |
461 | type); |
462 | if (r < 0) | |
463 | return r; | |
464 | } | |
31a4e153 | 465 | |
fcf81a54 | 466 | r = add_rtattr(m, type | NLA_F_NESTED, NULL, size); |
d8e538ec TG |
467 | if (r < 0) |
468 | return r; | |
469 | ||
313cefa1 | 470 | m->containers[m->n_containers++].offset = r; |
7ca1d319 | 471 | |
d8e538ec TG |
472 | return 0; |
473 | } | |
474 | ||
1c4baffc | 475 | int sd_netlink_message_open_container_union(sd_netlink_message *m, unsigned short type, const char *key) { |
d8e538ec TG |
476 | const NLTypeSystemUnion *type_system_union; |
477 | int r; | |
478 | ||
479 | assert_return(m, -EINVAL); | |
480 | assert_return(!m->sealed, -EPERM); | |
481 | ||
f663aeb8 | 482 | r = type_system_get_type_system_union(m->containers[m->n_containers].type_system, &type_system_union, type); |
d8e538ec TG |
483 | if (r < 0) |
484 | return r; | |
485 | ||
486 | r = type_system_union_get_type_system(type_system_union, | |
f663aeb8 | 487 | &m->containers[m->n_containers + 1].type_system, |
d8e538ec TG |
488 | key); |
489 | if (r < 0) | |
490 | return r; | |
33125ac5 | 491 | |
1c4baffc | 492 | r = sd_netlink_message_append_string(m, type_system_union->match, key); |
d8e538ec TG |
493 | if (r < 0) |
494 | return r; | |
495 | ||
05d0c2e3 | 496 | /* do we ever need non-null size */ |
da041d69 | 497 | r = add_rtattr(m, type | NLA_F_NESTED, NULL, 0); |
d8e538ec TG |
498 | if (r < 0) |
499 | return r; | |
500 | ||
313cefa1 | 501 | m->containers[m->n_containers++].offset = r; |
7ca1d319 | 502 | |
d8e538ec | 503 | return 0; |
33125ac5 TG |
504 | } |
505 | ||
1c4baffc | 506 | int sd_netlink_message_close_container(sd_netlink_message *m) { |
33125ac5 | 507 | assert_return(m, -EINVAL); |
e5c4350b | 508 | assert_return(!m->sealed, -EPERM); |
5a081409 | 509 | assert_return(m->n_containers > 0, -EINVAL); |
33125ac5 | 510 | |
f663aeb8 | 511 | m->containers[m->n_containers].type_system = NULL; |
05d0c2e3 JT |
512 | m->containers[m->n_containers].offset = 0; |
513 | m->n_containers--; | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | int sd_netlink_message_open_array(sd_netlink_message *m, uint16_t type) { | |
519 | int r; | |
520 | ||
521 | assert_return(m, -EINVAL); | |
522 | assert_return(!m->sealed, -EPERM); | |
523 | assert_return(m->n_containers > 0, -EINVAL); | |
524 | ||
525 | r = add_rtattr(m, type | NLA_F_NESTED, NULL, 0); | |
526 | if (r < 0) | |
527 | return r; | |
528 | ||
529 | m->containers[m->n_containers].offset = r; | |
530 | m->n_containers++; | |
531 | m->containers[m->n_containers].type_system = m->containers[m->n_containers - 1].type_system; | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | int sd_netlink_message_cancel_array(sd_netlink_message *m) { | |
537 | unsigned i; | |
538 | uint32_t rta_len; | |
539 | ||
540 | assert_return(m, -EINVAL); | |
541 | assert_return(!m->sealed, -EPERM); | |
542 | assert_return(m->n_containers > 1, -EINVAL); | |
543 | ||
544 | rta_len = GET_CONTAINER(m, (m->n_containers - 1))->rta_len; | |
545 | ||
546 | for (i = 0; i < m->n_containers; i++) | |
547 | GET_CONTAINER(m, i)->rta_len -= rta_len; | |
548 | ||
549 | m->hdr->nlmsg_len -= rta_len; | |
550 | ||
313cefa1 | 551 | m->n_containers--; |
05d0c2e3 | 552 | m->containers[m->n_containers].type_system = NULL; |
33125ac5 TG |
553 | |
554 | return 0; | |
555 | } | |
556 | ||
4c641e99 | 557 | static int netlink_message_read_internal(sd_netlink_message *m, unsigned short type, void **data, bool *net_byteorder) { |
f663aeb8 | 558 | struct netlink_attribute *attribute; |
f66eeb6b TG |
559 | struct rtattr *rta; |
560 | ||
44caa5e7 SS |
561 | assert_return(m, -EINVAL); |
562 | assert_return(m->sealed, -EPERM); | |
563 | assert_return(data, -EINVAL); | |
f1dd72c2 | 564 | |
0610939d | 565 | assert(m->n_containers < RTNL_CONTAINER_DEPTH); |
f663aeb8 TG |
566 | assert(m->containers[m->n_containers].attributes); |
567 | assert(type < m->containers[m->n_containers].n_attributes); | |
44caa5e7 | 568 | |
f663aeb8 TG |
569 | attribute = &m->containers[m->n_containers].attributes[type]; |
570 | ||
f1dd72c2 | 571 | if (attribute->offset == 0) |
44caa5e7 SS |
572 | return -ENODATA; |
573 | ||
f663aeb8 | 574 | rta = (struct rtattr*)((uint8_t *) m->hdr + attribute->offset); |
44caa5e7 | 575 | |
f66eeb6b TG |
576 | *data = RTA_DATA(rta); |
577 | ||
4c641e99 TG |
578 | if (net_byteorder) |
579 | *net_byteorder = attribute->net_byteorder; | |
580 | ||
f66eeb6b | 581 | return RTA_PAYLOAD(rta); |
44caa5e7 SS |
582 | } |
583 | ||
926062f0 SS |
584 | int sd_netlink_message_read(sd_netlink_message *m, unsigned short type, size_t size, void *data) { |
585 | void *attr_data; | |
586 | int r; | |
587 | ||
588 | assert_return(m, -EINVAL); | |
589 | ||
590 | r = netlink_message_read_internal(m, type, &attr_data, NULL); | |
591 | if (r < 0) | |
592 | return r; | |
593 | ||
594 | if ((size_t) r < size) | |
595 | return -EIO; | |
596 | ||
597 | if (data) | |
598 | memcpy(data, attr_data, size); | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
1c4baffc | 603 | int sd_netlink_message_read_string(sd_netlink_message *m, unsigned short type, const char **data) { |
44caa5e7 SS |
604 | int r; |
605 | void *attr_data; | |
606 | ||
73ae2b7d TG |
607 | assert_return(m, -EINVAL); |
608 | ||
6c14ad61 | 609 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_STRING); |
d8e538ec TG |
610 | if (r < 0) |
611 | return r; | |
44caa5e7 | 612 | |
4c641e99 | 613 | r = netlink_message_read_internal(m, type, &attr_data, NULL); |
f66eeb6b | 614 | if (r < 0) |
44caa5e7 | 615 | return r; |
f66eeb6b TG |
616 | else if (strnlen(attr_data, r) >= (size_t) r) |
617 | return -EIO; | |
44caa5e7 | 618 | |
73ae2b7d TG |
619 | if (data) |
620 | *data = (const char *) attr_data; | |
44caa5e7 SS |
621 | |
622 | return 0; | |
623 | } | |
624 | ||
1c4baffc | 625 | int sd_netlink_message_read_u8(sd_netlink_message *m, unsigned short type, uint8_t *data) { |
44caa5e7 SS |
626 | int r; |
627 | void *attr_data; | |
628 | ||
73ae2b7d TG |
629 | assert_return(m, -EINVAL); |
630 | ||
6c14ad61 | 631 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U8); |
d8e538ec TG |
632 | if (r < 0) |
633 | return r; | |
44caa5e7 | 634 | |
4c641e99 | 635 | r = netlink_message_read_internal(m, type, &attr_data, NULL); |
f66eeb6b | 636 | if (r < 0) |
44caa5e7 | 637 | return r; |
f66eeb6b TG |
638 | else if ((size_t) r < sizeof(uint8_t)) |
639 | return -EIO; | |
44caa5e7 | 640 | |
73ae2b7d TG |
641 | if (data) |
642 | *data = *(uint8_t *) attr_data; | |
44caa5e7 SS |
643 | |
644 | return 0; | |
645 | } | |
646 | ||
1c4baffc | 647 | int sd_netlink_message_read_u16(sd_netlink_message *m, unsigned short type, uint16_t *data) { |
44caa5e7 | 648 | void *attr_data; |
4c641e99 TG |
649 | bool net_byteorder; |
650 | int r; | |
44caa5e7 | 651 | |
73ae2b7d TG |
652 | assert_return(m, -EINVAL); |
653 | ||
6c14ad61 | 654 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U16); |
d8e538ec TG |
655 | if (r < 0) |
656 | return r; | |
44caa5e7 | 657 | |
4c641e99 | 658 | r = netlink_message_read_internal(m, type, &attr_data, &net_byteorder); |
f66eeb6b | 659 | if (r < 0) |
44caa5e7 | 660 | return r; |
f66eeb6b TG |
661 | else if ((size_t) r < sizeof(uint16_t)) |
662 | return -EIO; | |
44caa5e7 | 663 | |
4c641e99 TG |
664 | if (data) { |
665 | if (net_byteorder) | |
666 | *data = be16toh(*(uint16_t *) attr_data); | |
667 | else | |
668 | *data = *(uint16_t *) attr_data; | |
669 | } | |
44caa5e7 SS |
670 | |
671 | return 0; | |
672 | } | |
673 | ||
1c4baffc | 674 | int sd_netlink_message_read_u32(sd_netlink_message *m, unsigned short type, uint32_t *data) { |
44caa5e7 | 675 | void *attr_data; |
4c641e99 TG |
676 | bool net_byteorder; |
677 | int r; | |
44caa5e7 | 678 | |
73ae2b7d TG |
679 | assert_return(m, -EINVAL); |
680 | ||
6c14ad61 | 681 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U32); |
d8e538ec TG |
682 | if (r < 0) |
683 | return r; | |
44caa5e7 | 684 | |
4c641e99 | 685 | r = netlink_message_read_internal(m, type, &attr_data, &net_byteorder); |
f66eeb6b | 686 | if (r < 0) |
44caa5e7 | 687 | return r; |
f66eeb6b TG |
688 | else if ((size_t)r < sizeof(uint32_t)) |
689 | return -EIO; | |
44caa5e7 | 690 | |
4c641e99 TG |
691 | if (data) { |
692 | if (net_byteorder) | |
693 | *data = be32toh(*(uint32_t *) attr_data); | |
694 | else | |
695 | *data = *(uint32_t *) attr_data; | |
696 | } | |
44caa5e7 SS |
697 | |
698 | return 0; | |
699 | } | |
700 | ||
1c4baffc | 701 | int sd_netlink_message_read_ether_addr(sd_netlink_message *m, unsigned short type, struct ether_addr *data) { |
4e9e7f18 SS |
702 | int r; |
703 | void *attr_data; | |
704 | ||
73ae2b7d TG |
705 | assert_return(m, -EINVAL); |
706 | ||
6c14ad61 | 707 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_ETHER_ADDR); |
d8e538ec TG |
708 | if (r < 0) |
709 | return r; | |
4e9e7f18 | 710 | |
4c641e99 | 711 | r = netlink_message_read_internal(m, type, &attr_data, NULL); |
f66eeb6b | 712 | if (r < 0) |
4e9e7f18 | 713 | return r; |
f66eeb6b TG |
714 | else if ((size_t)r < sizeof(struct ether_addr)) |
715 | return -EIO; | |
4e9e7f18 | 716 | |
73ae2b7d TG |
717 | if (data) |
718 | memcpy(data, attr_data, sizeof(struct ether_addr)); | |
4e9e7f18 SS |
719 | |
720 | return 0; | |
721 | } | |
722 | ||
1c4baffc | 723 | int sd_netlink_message_read_cache_info(sd_netlink_message *m, unsigned short type, struct ifa_cacheinfo *info) { |
aba496a5 UTL |
724 | int r; |
725 | void *attr_data; | |
726 | ||
73ae2b7d TG |
727 | assert_return(m, -EINVAL); |
728 | ||
6c14ad61 | 729 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_CACHE_INFO); |
aba496a5 UTL |
730 | if (r < 0) |
731 | return r; | |
732 | ||
4c641e99 | 733 | r = netlink_message_read_internal(m, type, &attr_data, NULL); |
aba496a5 UTL |
734 | if (r < 0) |
735 | return r; | |
736 | else if ((size_t)r < sizeof(struct ifa_cacheinfo)) | |
737 | return -EIO; | |
738 | ||
73ae2b7d TG |
739 | if (info) |
740 | memcpy(info, attr_data, sizeof(struct ifa_cacheinfo)); | |
aba496a5 UTL |
741 | |
742 | return 0; | |
743 | } | |
744 | ||
1c4baffc | 745 | int sd_netlink_message_read_in_addr(sd_netlink_message *m, unsigned short type, struct in_addr *data) { |
4e9e7f18 SS |
746 | int r; |
747 | void *attr_data; | |
748 | ||
73ae2b7d TG |
749 | assert_return(m, -EINVAL); |
750 | ||
6c14ad61 | 751 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR); |
d8e538ec TG |
752 | if (r < 0) |
753 | return r; | |
4e9e7f18 | 754 | |
4c641e99 | 755 | r = netlink_message_read_internal(m, type, &attr_data, NULL); |
f66eeb6b | 756 | if (r < 0) |
4e9e7f18 | 757 | return r; |
f66eeb6b TG |
758 | else if ((size_t)r < sizeof(struct in_addr)) |
759 | return -EIO; | |
4e9e7f18 | 760 | |
73ae2b7d TG |
761 | if (data) |
762 | memcpy(data, attr_data, sizeof(struct in_addr)); | |
4e9e7f18 SS |
763 | |
764 | return 0; | |
765 | } | |
766 | ||
1c4baffc | 767 | int sd_netlink_message_read_in6_addr(sd_netlink_message *m, unsigned short type, struct in6_addr *data) { |
4e9e7f18 SS |
768 | int r; |
769 | void *attr_data; | |
770 | ||
73ae2b7d TG |
771 | assert_return(m, -EINVAL); |
772 | ||
6c14ad61 | 773 | r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR); |
d8e538ec TG |
774 | if (r < 0) |
775 | return r; | |
4e9e7f18 | 776 | |
4c641e99 | 777 | r = netlink_message_read_internal(m, type, &attr_data, NULL); |
3dd215e0 | 778 | if (r < 0) |
4e9e7f18 | 779 | return r; |
3dd215e0 TG |
780 | else if ((size_t)r < sizeof(struct in6_addr)) |
781 | return -EIO; | |
4e9e7f18 | 782 | |
73ae2b7d TG |
783 | if (data) |
784 | memcpy(data, attr_data, sizeof(struct in6_addr)); | |
4e9e7f18 SS |
785 | |
786 | return 0; | |
787 | } | |
788 | ||
f663aeb8 TG |
789 | static int netlink_container_parse(sd_netlink_message *m, |
790 | struct netlink_container *container, | |
791 | int count, | |
792 | struct rtattr *rta, | |
14cb109d | 793 | unsigned rt_len) { |
f663aeb8 | 794 | _cleanup_free_ struct netlink_attribute *attributes = NULL; |
4203fc8b | 795 | |
f663aeb8 | 796 | attributes = new0(struct netlink_attribute, count); |
9ed794a3 | 797 | if (!attributes) |
4203fc8b TG |
798 | return -ENOMEM; |
799 | ||
4203fc8b | 800 | for (; RTA_OK(rta, rt_len); rta = RTA_NEXT(rta, rt_len)) { |
f663aeb8 TG |
801 | unsigned short type; |
802 | ||
4203fc8b TG |
803 | type = RTA_TYPE(rta); |
804 | ||
805 | /* if the kernel is newer than the headers we used | |
f663aeb8 | 806 | when building, we ignore out-of-range attributes */ |
4203fc8b TG |
807 | if (type >= count) |
808 | continue; | |
809 | ||
f1dd72c2 | 810 | if (attributes[type].offset != 0) |
4203fc8b TG |
811 | log_debug("rtnl: message parse - overwriting repeated attribute"); |
812 | ||
f663aeb8 | 813 | attributes[type].offset = (uint8_t *) rta - (uint8_t *) m->hdr; |
4c641e99 TG |
814 | attributes[type].nested = RTA_FLAGS(rta) & NLA_F_NESTED; |
815 | attributes[type].net_byteorder = RTA_FLAGS(rta) & NLA_F_NET_BYTEORDER; | |
4203fc8b TG |
816 | } |
817 | ||
ae2a15bc | 818 | container->attributes = TAKE_PTR(attributes); |
f663aeb8 | 819 | container->n_attributes = count; |
4203fc8b TG |
820 | |
821 | return 0; | |
822 | } | |
823 | ||
817d1cd8 | 824 | int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short type_id) { |
d8e538ec TG |
825 | const NLType *nl_type; |
826 | const NLTypeSystem *type_system; | |
3dd215e0 | 827 | void *container; |
817d1cd8 | 828 | uint16_t type; |
d8e538ec TG |
829 | size_t size; |
830 | int r; | |
3dd215e0 TG |
831 | |
832 | assert_return(m, -EINVAL); | |
833 | assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -EINVAL); | |
834 | ||
f663aeb8 | 835 | r = type_system_get_type(m->containers[m->n_containers].type_system, |
d8e538ec | 836 | &nl_type, |
817d1cd8 | 837 | type_id); |
3dd215e0 TG |
838 | if (r < 0) |
839 | return r; | |
3dd215e0 | 840 | |
817d1cd8 DH |
841 | type = type_get_type(nl_type); |
842 | ||
843 | if (type == NETLINK_TYPE_NESTED) { | |
f663aeb8 | 844 | r = type_system_get_type_system(m->containers[m->n_containers].type_system, |
d8e538ec | 845 | &type_system, |
817d1cd8 | 846 | type_id); |
d8e538ec TG |
847 | if (r < 0) |
848 | return r; | |
817d1cd8 | 849 | } else if (type == NETLINK_TYPE_UNION) { |
d8e538ec | 850 | const NLTypeSystemUnion *type_system_union; |
d8e538ec | 851 | |
f663aeb8 | 852 | r = type_system_get_type_system_union(m->containers[m->n_containers].type_system, |
d8e538ec | 853 | &type_system_union, |
817d1cd8 | 854 | type_id); |
d8e538ec TG |
855 | if (r < 0) |
856 | return r; | |
857 | ||
4af7b60d TG |
858 | switch (type_system_union->match_type) { |
859 | case NL_MATCH_SIBLING: | |
860 | { | |
861 | const char *key; | |
862 | ||
1c4baffc | 863 | r = sd_netlink_message_read_string(m, type_system_union->match, &key); |
4af7b60d TG |
864 | if (r < 0) |
865 | return r; | |
866 | ||
867 | r = type_system_union_get_type_system(type_system_union, | |
868 | &type_system, | |
869 | key); | |
870 | if (r < 0) | |
871 | return r; | |
872 | ||
873 | break; | |
874 | } | |
875 | case NL_MATCH_PROTOCOL: | |
876 | { | |
877 | int family; | |
878 | ||
89489ef7 | 879 | r = sd_rtnl_message_get_family(m, &family); |
4af7b60d TG |
880 | if (r < 0) |
881 | return r; | |
882 | ||
883 | r = type_system_union_protocol_get_type_system(type_system_union, | |
884 | &type_system, | |
885 | family); | |
886 | if (r < 0) | |
887 | return r; | |
888 | ||
889 | break; | |
890 | } | |
891 | default: | |
1c4baffc | 892 | assert_not_reached("sd-netlink: invalid type system union type"); |
4af7b60d | 893 | } |
d8e538ec TG |
894 | } else |
895 | return -EINVAL; | |
896 | ||
4c641e99 | 897 | r = netlink_message_read_internal(m, type_id, &container, NULL); |
3dd215e0 TG |
898 | if (r < 0) |
899 | return r; | |
d8e538ec TG |
900 | else |
901 | size = (size_t)r; | |
3dd215e0 | 902 | |
313cefa1 | 903 | m->n_containers++; |
3dd215e0 | 904 | |
f663aeb8 TG |
905 | r = netlink_container_parse(m, |
906 | &m->containers[m->n_containers], | |
907 | type_system_get_count(type_system), | |
908 | container, | |
909 | size); | |
d8e538ec | 910 | if (r < 0) { |
313cefa1 | 911 | m->n_containers--; |
3dd215e0 | 912 | return r; |
d8e538ec | 913 | } |
3dd215e0 | 914 | |
f663aeb8 | 915 | m->containers[m->n_containers].type_system = type_system; |
3dd215e0 TG |
916 | |
917 | return 0; | |
918 | } | |
919 | ||
1c4baffc | 920 | int sd_netlink_message_exit_container(sd_netlink_message *m) { |
e5c4350b TG |
921 | assert_return(m, -EINVAL); |
922 | assert_return(m->sealed, -EINVAL); | |
923 | assert_return(m->n_containers > 0, -EINVAL); | |
924 | ||
a1e58e8e | 925 | m->containers[m->n_containers].attributes = mfree(m->containers[m->n_containers].attributes); |
f663aeb8 | 926 | m->containers[m->n_containers].type_system = NULL; |
3dd215e0 | 927 | |
313cefa1 | 928 | m->n_containers--; |
e5c4350b TG |
929 | |
930 | return 0; | |
931 | } | |
932 | ||
1c4baffc | 933 | uint32_t rtnl_message_get_serial(sd_netlink_message *m) { |
65f568bb | 934 | assert(m); |
9d0db178 | 935 | assert(m->hdr); |
65f568bb TG |
936 | |
937 | return m->hdr->nlmsg_seq; | |
938 | } | |
939 | ||
1c4baffc | 940 | int sd_netlink_message_is_error(sd_netlink_message *m) { |
45af44d4 TG |
941 | assert_return(m, 0); |
942 | assert_return(m->hdr, 0); | |
943 | ||
944 | return m->hdr->nlmsg_type == NLMSG_ERROR; | |
945 | } | |
946 | ||
1c4baffc | 947 | int sd_netlink_message_get_errno(sd_netlink_message *m) { |
65f568bb TG |
948 | struct nlmsgerr *err; |
949 | ||
e16bcf98 | 950 | assert_return(m, -EINVAL); |
9d0db178 | 951 | assert_return(m->hdr, -EINVAL); |
65f568bb | 952 | |
1c4baffc | 953 | if (!sd_netlink_message_is_error(m)) |
65f568bb TG |
954 | return 0; |
955 | ||
956 | err = NLMSG_DATA(m->hdr); | |
957 | ||
958 | return err->error; | |
959 | } | |
960 | ||
1c4baffc | 961 | int sd_netlink_message_rewind(sd_netlink_message *m) { |
817d1cd8 | 962 | const NLType *nl_type; |
05d0c2e3 | 963 | const NLTypeSystem *type_system_root; |
817d1cd8 DH |
964 | uint16_t type; |
965 | size_t size; | |
3dd215e0 TG |
966 | unsigned i; |
967 | int r; | |
0fc7531b TG |
968 | |
969 | assert_return(m, -EINVAL); | |
0fc7531b | 970 | |
3dd215e0 TG |
971 | /* don't allow appending to message once parsed */ |
972 | if (!m->sealed) | |
973 | rtnl_message_seal(m); | |
974 | ||
05d0c2e3 JT |
975 | type_system_root = type_system_get_root(m->protocol); |
976 | ||
1f6b4113 | 977 | for (i = 1; i <= m->n_containers; i++) |
a1e58e8e | 978 | m->containers[i].attributes = mfree(m->containers[i].attributes); |
3dd215e0 TG |
979 | |
980 | m->n_containers = 0; | |
981 | ||
ece174c5 | 982 | if (m->containers[0].attributes) |
3dd215e0 TG |
983 | /* top-level attributes have already been parsed */ |
984 | return 0; | |
3dd215e0 | 985 | |
d8e538ec TG |
986 | assert(m->hdr); |
987 | ||
05d0c2e3 | 988 | r = type_system_get_type(type_system_root, &nl_type, m->hdr->nlmsg_type); |
d8e538ec TG |
989 | if (r < 0) |
990 | return r; | |
991 | ||
817d1cd8 DH |
992 | type = type_get_type(nl_type); |
993 | size = type_get_size(nl_type); | |
994 | ||
995 | if (type == NETLINK_TYPE_NESTED) { | |
c658008f | 996 | const NLTypeSystem *type_system; |
d8e538ec | 997 | |
817d1cd8 | 998 | type_get_type_system(nl_type, &type_system); |
d8e538ec | 999 | |
f663aeb8 | 1000 | m->containers[0].type_system = type_system; |
d8e538ec | 1001 | |
f663aeb8 TG |
1002 | r = netlink_container_parse(m, |
1003 | &m->containers[m->n_containers], | |
1004 | type_system_get_count(type_system), | |
1005 | (struct rtattr*)((uint8_t*)NLMSG_DATA(m->hdr) + NLMSG_ALIGN(size)), | |
1006 | NLMSG_PAYLOAD(m->hdr, size)); | |
d8e538ec TG |
1007 | if (r < 0) |
1008 | return r; | |
0fc7531b TG |
1009 | } |
1010 | ||
1011 | return 0; | |
1012 | } | |
3dd215e0 | 1013 | |
1c4baffc | 1014 | void rtnl_message_seal(sd_netlink_message *m) { |
3dd215e0 TG |
1015 | assert(m); |
1016 | assert(!m->sealed); | |
1017 | ||
1018 | m->sealed = true; | |
1019 | } | |
1403f45a | 1020 | |
1c4baffc | 1021 | sd_netlink_message *sd_netlink_message_next(sd_netlink_message *m) { |
1403f45a TG |
1022 | assert_return(m, NULL); |
1023 | ||
1024 | return m->next; | |
1025 | } |