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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
623a4c97 LP |
2 | |
3 | #include <netinet/tcp.h> | |
4 | ||
b5efdb8a | 5 | #include "alloc-util.h" |
3ffd4af2 | 6 | #include "fd-util.h" |
afc5dbf3 | 7 | #include "io-util.h" |
623a4c97 LP |
8 | #include "missing.h" |
9 | #include "resolved-dns-stream.h" | |
10 | ||
11 | #define DNS_STREAM_TIMEOUT_USEC (10 * USEC_PER_SEC) | |
12 | #define DNS_STREAMS_MAX 128 | |
13 | ||
14 | static void dns_stream_stop(DnsStream *s) { | |
15 | assert(s); | |
16 | ||
17 | s->io_event_source = sd_event_source_unref(s->io_event_source); | |
18 | s->timeout_event_source = sd_event_source_unref(s->timeout_event_source); | |
19 | s->fd = safe_close(s->fd); | |
20 | } | |
21 | ||
22 | static int dns_stream_update_io(DnsStream *s) { | |
23 | int f = 0; | |
24 | ||
25 | assert(s); | |
26 | ||
27 | if (s->write_packet && s->n_written < sizeof(s->write_size) + s->write_packet->size) | |
28 | f |= EPOLLOUT; | |
98767d75 IT |
29 | else if (!ordered_set_isempty(s->write_queue)) { |
30 | dns_packet_unref(s->write_packet); | |
31 | s->write_packet = ordered_set_steal_first(s->write_queue); | |
32 | s->write_size = htobe16(s->write_packet->size); | |
33 | s->n_written = 0; | |
34 | f |= EPOLLOUT; | |
35 | } | |
623a4c97 LP |
36 | if (!s->read_packet || s->n_read < sizeof(s->read_size) + s->read_packet->size) |
37 | f |= EPOLLIN; | |
38 | ||
ba6aaf57 IT |
39 | #if ENABLE_DNS_OVER_TLS |
40 | /* For handshake and clean closing purposes, TLS can override requested events */ | |
41 | if (s->dnstls_events) | |
42 | f = s->dnstls_events; | |
43 | #endif | |
44 | ||
623a4c97 LP |
45 | return sd_event_source_set_io_events(s->io_event_source, f); |
46 | } | |
47 | ||
b914e211 | 48 | static int dns_stream_complete(DnsStream *s, int error) { |
623a4c97 LP |
49 | assert(s); |
50 | ||
56ddbf10 | 51 | #if ENABLE_DNS_OVER_TLS |
6016fcb0 | 52 | if (s->encrypted) { |
5d67a7ae IT |
53 | int r; |
54 | ||
6016fcb0 IT |
55 | r = dnstls_stream_shutdown(s, error); |
56 | if (r != -EAGAIN) | |
5d67a7ae IT |
57 | dns_stream_stop(s); |
58 | } else | |
59 | #endif | |
60 | dns_stream_stop(s); | |
623a4c97 LP |
61 | |
62 | if (s->complete) | |
63 | s->complete(s, error); | |
b30bf55d LP |
64 | else /* the default action if no completion function is set is to close the stream */ |
65 | dns_stream_unref(s); | |
623a4c97 LP |
66 | |
67 | return 0; | |
68 | } | |
69 | ||
b914e211 LP |
70 | static int dns_stream_identify(DnsStream *s) { |
71 | union { | |
72 | struct cmsghdr header; /* For alignment */ | |
40a1eebd | 73 | uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) |
b914e211 LP |
74 | + EXTRA_CMSG_SPACE /* kernel appears to require extra space */]; |
75 | } control; | |
76 | struct msghdr mh = {}; | |
77 | struct cmsghdr *cmsg; | |
78 | socklen_t sl; | |
79 | int r; | |
80 | ||
81 | assert(s); | |
82 | ||
83 | if (s->identified) | |
84 | return 0; | |
85 | ||
86 | /* Query the local side */ | |
87 | s->local_salen = sizeof(s->local); | |
88 | r = getsockname(s->fd, &s->local.sa, &s->local_salen); | |
89 | if (r < 0) | |
90 | return -errno; | |
91 | if (s->local.sa.sa_family == AF_INET6 && s->ifindex <= 0) | |
92 | s->ifindex = s->local.in6.sin6_scope_id; | |
93 | ||
94 | /* Query the remote side */ | |
95 | s->peer_salen = sizeof(s->peer); | |
96 | r = getpeername(s->fd, &s->peer.sa, &s->peer_salen); | |
97 | if (r < 0) | |
98 | return -errno; | |
99 | if (s->peer.sa.sa_family == AF_INET6 && s->ifindex <= 0) | |
100 | s->ifindex = s->peer.in6.sin6_scope_id; | |
101 | ||
102 | /* Check consistency */ | |
103 | assert(s->peer.sa.sa_family == s->local.sa.sa_family); | |
104 | assert(IN_SET(s->peer.sa.sa_family, AF_INET, AF_INET6)); | |
105 | ||
106 | /* Query connection meta information */ | |
107 | sl = sizeof(control); | |
108 | if (s->peer.sa.sa_family == AF_INET) { | |
109 | r = getsockopt(s->fd, IPPROTO_IP, IP_PKTOPTIONS, &control, &sl); | |
110 | if (r < 0) | |
111 | return -errno; | |
112 | } else if (s->peer.sa.sa_family == AF_INET6) { | |
113 | ||
114 | r = getsockopt(s->fd, IPPROTO_IPV6, IPV6_2292PKTOPTIONS, &control, &sl); | |
115 | if (r < 0) | |
116 | return -errno; | |
117 | } else | |
118 | return -EAFNOSUPPORT; | |
119 | ||
120 | mh.msg_control = &control; | |
121 | mh.msg_controllen = sl; | |
2a1288ff LP |
122 | |
123 | CMSG_FOREACH(cmsg, &mh) { | |
b914e211 LP |
124 | |
125 | if (cmsg->cmsg_level == IPPROTO_IPV6) { | |
126 | assert(s->peer.sa.sa_family == AF_INET6); | |
127 | ||
128 | switch (cmsg->cmsg_type) { | |
129 | ||
130 | case IPV6_PKTINFO: { | |
131 | struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
132 | ||
133 | if (s->ifindex <= 0) | |
134 | s->ifindex = i->ipi6_ifindex; | |
135 | break; | |
136 | } | |
137 | ||
138 | case IPV6_HOPLIMIT: | |
139 | s->ttl = *(int *) CMSG_DATA(cmsg); | |
140 | break; | |
141 | } | |
142 | ||
143 | } else if (cmsg->cmsg_level == IPPROTO_IP) { | |
144 | assert(s->peer.sa.sa_family == AF_INET); | |
145 | ||
146 | switch (cmsg->cmsg_type) { | |
147 | ||
148 | case IP_PKTINFO: { | |
149 | struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
150 | ||
151 | if (s->ifindex <= 0) | |
152 | s->ifindex = i->ipi_ifindex; | |
153 | break; | |
154 | } | |
155 | ||
156 | case IP_TTL: | |
157 | s->ttl = *(int *) CMSG_DATA(cmsg); | |
158 | break; | |
159 | } | |
160 | } | |
161 | } | |
162 | ||
163 | /* The Linux kernel sets the interface index to the loopback | |
164 | * device if the connection came from the local host since it | |
165 | * avoids the routing table in such a case. Let's unset the | |
166 | * interface index in such a case. */ | |
a5f03596 | 167 | if (s->ifindex == LOOPBACK_IFINDEX) |
b914e211 LP |
168 | s->ifindex = 0; |
169 | ||
170 | /* If we don't know the interface index still, we look for the | |
171 | * first local interface with a matching address. Yuck! */ | |
172 | if (s->ifindex <= 0) | |
173 | s->ifindex = manager_find_ifindex(s->manager, s->local.sa.sa_family, s->local.sa.sa_family == AF_INET ? (union in_addr_union*) &s->local.in.sin_addr : (union in_addr_union*) &s->local.in6.sin6_addr); | |
174 | ||
175 | if (s->protocol == DNS_PROTOCOL_LLMNR && s->ifindex > 0) { | |
176 | uint32_t ifindex = htobe32(s->ifindex); | |
177 | ||
178 | /* Make sure all packets for this connection are sent on the same interface */ | |
179 | if (s->local.sa.sa_family == AF_INET) { | |
180 | r = setsockopt(s->fd, IPPROTO_IP, IP_UNICAST_IF, &ifindex, sizeof(ifindex)); | |
181 | if (r < 0) | |
56f64d95 | 182 | log_debug_errno(errno, "Failed to invoke IP_UNICAST_IF: %m"); |
b914e211 LP |
183 | } else if (s->local.sa.sa_family == AF_INET6) { |
184 | r = setsockopt(s->fd, IPPROTO_IPV6, IPV6_UNICAST_IF, &ifindex, sizeof(ifindex)); | |
185 | if (r < 0) | |
56f64d95 | 186 | log_debug_errno(errno, "Failed to invoke IPV6_UNICAST_IF: %m"); |
b914e211 LP |
187 | } |
188 | } | |
189 | ||
190 | s->identified = true; | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
6016fcb0 | 195 | ssize_t dns_stream_writev(DnsStream *s, const struct iovec *iov, size_t iovcnt, int flags) { |
e6dc5556 | 196 | ssize_t m; |
91ccab1e IT |
197 | |
198 | assert(s); | |
199 | assert(iov); | |
200 | ||
56ddbf10 | 201 | #if ENABLE_DNS_OVER_TLS |
6016fcb0 | 202 | if (s->encrypted && !(flags & DNS_STREAM_WRITE_TLS_DATA)) { |
5d67a7ae IT |
203 | ssize_t ss; |
204 | size_t i; | |
205 | ||
e6dc5556 | 206 | m = 0; |
5d67a7ae | 207 | for (i = 0; i < iovcnt; i++) { |
6016fcb0 IT |
208 | ss = dnstls_stream_write(s, iov[i].iov_base, iov[i].iov_len); |
209 | if (ss < 0) | |
210 | return ss; | |
5d67a7ae | 211 | |
e6dc5556 | 212 | m += ss; |
5d67a7ae IT |
213 | if (ss != (ssize_t) iov[i].iov_len) |
214 | continue; | |
215 | } | |
216 | } else | |
217 | #endif | |
91ccab1e IT |
218 | if (s->tfo_salen > 0) { |
219 | struct msghdr hdr = { | |
220 | .msg_iov = (struct iovec*) iov, | |
221 | .msg_iovlen = iovcnt, | |
222 | .msg_name = &s->tfo_address.sa, | |
223 | .msg_namelen = s->tfo_salen | |
224 | }; | |
225 | ||
e6dc5556 LP |
226 | m = sendmsg(s->fd, &hdr, MSG_FASTOPEN); |
227 | if (m < 0) { | |
91ccab1e IT |
228 | if (errno == EOPNOTSUPP) { |
229 | s->tfo_salen = 0; | |
e6dc5556 | 230 | if (connect(s->fd, &s->tfo_address.sa, s->tfo_salen) < 0) |
91ccab1e IT |
231 | return -errno; |
232 | ||
e6dc5556 LP |
233 | return -EAGAIN; |
234 | } | |
235 | if (errno == EINPROGRESS) | |
236 | return -EAGAIN; | |
237 | ||
238 | return -errno; | |
91ccab1e IT |
239 | } else |
240 | s->tfo_salen = 0; /* connection is made */ | |
f6c9c5f8 | 241 | } else { |
e6dc5556 LP |
242 | m = writev(s->fd, iov, iovcnt); |
243 | if (m < 0) | |
244 | return -errno; | |
f6c9c5f8 | 245 | } |
91ccab1e | 246 | |
e6dc5556 | 247 | return m; |
91ccab1e IT |
248 | } |
249 | ||
5d67a7ae IT |
250 | static ssize_t dns_stream_read(DnsStream *s, void *buf, size_t count) { |
251 | ssize_t ss; | |
252 | ||
56ddbf10 | 253 | #if ENABLE_DNS_OVER_TLS |
6016fcb0 IT |
254 | if (s->encrypted) |
255 | ss = dnstls_stream_read(s, buf, count); | |
256 | else | |
5d67a7ae | 257 | #endif |
f6c9c5f8 | 258 | { |
5d67a7ae | 259 | ss = read(s->fd, buf, count); |
f6c9c5f8 | 260 | if (ss < 0) |
94fdb4d9 | 261 | return -errno; |
f6c9c5f8 | 262 | } |
5d67a7ae IT |
263 | |
264 | return ss; | |
265 | } | |
266 | ||
623a4c97 LP |
267 | static int on_stream_timeout(sd_event_source *es, usec_t usec, void *userdata) { |
268 | DnsStream *s = userdata; | |
269 | ||
270 | assert(s); | |
271 | ||
b914e211 | 272 | return dns_stream_complete(s, ETIMEDOUT); |
623a4c97 LP |
273 | } |
274 | ||
275 | static int on_stream_io(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
276 | DnsStream *s = userdata; | |
277 | int r; | |
278 | ||
279 | assert(s); | |
280 | ||
56ddbf10 | 281 | #if ENABLE_DNS_OVER_TLS |
6016fcb0 | 282 | if (s->encrypted) { |
04c4d919 | 283 | r = dnstls_stream_on_io(s, revents); |
ba6aaf57 | 284 | if (r == DNSTLS_STREAM_CLOSED) |
6016fcb0 | 285 | return 0; |
b2cf6704 | 286 | if (r == -EAGAIN) |
ba6aaf57 | 287 | return dns_stream_update_io(s); |
b2cf6704 | 288 | if (r < 0) |
6016fcb0 | 289 | return dns_stream_complete(s, -r); |
b2cf6704 LP |
290 | |
291 | r = dns_stream_update_io(s); | |
292 | if (r < 0) | |
293 | return r; | |
5d67a7ae IT |
294 | } |
295 | #endif | |
296 | ||
91ccab1e IT |
297 | /* only identify after connecting */ |
298 | if (s->tfo_salen == 0) { | |
299 | r = dns_stream_identify(s); | |
300 | if (r < 0) | |
301 | return dns_stream_complete(s, -r); | |
302 | } | |
b914e211 | 303 | |
623a4c97 LP |
304 | if ((revents & EPOLLOUT) && |
305 | s->write_packet && | |
306 | s->n_written < sizeof(s->write_size) + s->write_packet->size) { | |
307 | ||
308 | struct iovec iov[2]; | |
309 | ssize_t ss; | |
310 | ||
5cfa2c3d LP |
311 | iov[0] = IOVEC_MAKE(&s->write_size, sizeof(s->write_size)); |
312 | iov[1] = IOVEC_MAKE(DNS_PACKET_DATA(s->write_packet), s->write_packet->size); | |
623a4c97 LP |
313 | |
314 | IOVEC_INCREMENT(iov, 2, s->n_written); | |
315 | ||
5d67a7ae | 316 | ss = dns_stream_writev(s, iov, 2, 0); |
623a4c97 | 317 | if (ss < 0) { |
f6c9c5f8 IT |
318 | if (!IN_SET(-ss, EINTR, EAGAIN)) |
319 | return dns_stream_complete(s, -ss); | |
623a4c97 LP |
320 | } else |
321 | s->n_written += ss; | |
322 | ||
323 | /* Are we done? If so, disable the event source for EPOLLOUT */ | |
324 | if (s->n_written >= sizeof(s->write_size) + s->write_packet->size) { | |
325 | r = dns_stream_update_io(s); | |
326 | if (r < 0) | |
b914e211 | 327 | return dns_stream_complete(s, -r); |
623a4c97 LP |
328 | } |
329 | } | |
330 | ||
331 | if ((revents & (EPOLLIN|EPOLLHUP|EPOLLRDHUP)) && | |
332 | (!s->read_packet || | |
333 | s->n_read < sizeof(s->read_size) + s->read_packet->size)) { | |
334 | ||
335 | if (s->n_read < sizeof(s->read_size)) { | |
336 | ssize_t ss; | |
337 | ||
5d67a7ae | 338 | ss = dns_stream_read(s, (uint8_t*) &s->read_size + s->n_read, sizeof(s->read_size) - s->n_read); |
623a4c97 | 339 | if (ss < 0) { |
f6c9c5f8 IT |
340 | if (!IN_SET(-ss, EINTR, EAGAIN)) |
341 | return dns_stream_complete(s, -ss); | |
623a4c97 | 342 | } else if (ss == 0) |
b914e211 | 343 | return dns_stream_complete(s, ECONNRESET); |
623a4c97 LP |
344 | else |
345 | s->n_read += ss; | |
346 | } | |
347 | ||
348 | if (s->n_read >= sizeof(s->read_size)) { | |
349 | ||
350 | if (be16toh(s->read_size) < DNS_PACKET_HEADER_SIZE) | |
b914e211 | 351 | return dns_stream_complete(s, EBADMSG); |
623a4c97 LP |
352 | |
353 | if (s->n_read < sizeof(s->read_size) + be16toh(s->read_size)) { | |
354 | ssize_t ss; | |
355 | ||
356 | if (!s->read_packet) { | |
51027656 | 357 | r = dns_packet_new(&s->read_packet, s->protocol, be16toh(s->read_size), DNS_PACKET_SIZE_MAX); |
623a4c97 | 358 | if (r < 0) |
b914e211 | 359 | return dns_stream_complete(s, -r); |
623a4c97 LP |
360 | |
361 | s->read_packet->size = be16toh(s->read_size); | |
362 | s->read_packet->ipproto = IPPROTO_TCP; | |
363 | s->read_packet->family = s->peer.sa.sa_family; | |
364 | s->read_packet->ttl = s->ttl; | |
365 | s->read_packet->ifindex = s->ifindex; | |
366 | ||
367 | if (s->read_packet->family == AF_INET) { | |
368 | s->read_packet->sender.in = s->peer.in.sin_addr; | |
369 | s->read_packet->sender_port = be16toh(s->peer.in.sin_port); | |
370 | s->read_packet->destination.in = s->local.in.sin_addr; | |
371 | s->read_packet->destination_port = be16toh(s->local.in.sin_port); | |
372 | } else { | |
373 | assert(s->read_packet->family == AF_INET6); | |
374 | s->read_packet->sender.in6 = s->peer.in6.sin6_addr; | |
375 | s->read_packet->sender_port = be16toh(s->peer.in6.sin6_port); | |
376 | s->read_packet->destination.in6 = s->local.in6.sin6_addr; | |
377 | s->read_packet->destination_port = be16toh(s->local.in6.sin6_port); | |
378 | ||
379 | if (s->read_packet->ifindex == 0) | |
380 | s->read_packet->ifindex = s->peer.in6.sin6_scope_id; | |
381 | if (s->read_packet->ifindex == 0) | |
382 | s->read_packet->ifindex = s->local.in6.sin6_scope_id; | |
383 | } | |
384 | } | |
385 | ||
5d67a7ae | 386 | ss = dns_stream_read(s, |
623a4c97 LP |
387 | (uint8_t*) DNS_PACKET_DATA(s->read_packet) + s->n_read - sizeof(s->read_size), |
388 | sizeof(s->read_size) + be16toh(s->read_size) - s->n_read); | |
389 | if (ss < 0) { | |
99521cab YW |
390 | if (!IN_SET(-ss, EINTR, EAGAIN)) |
391 | return dns_stream_complete(s, -ss); | |
623a4c97 | 392 | } else if (ss == 0) |
b914e211 | 393 | return dns_stream_complete(s, ECONNRESET); |
623a4c97 LP |
394 | else |
395 | s->n_read += ss; | |
396 | } | |
397 | ||
398 | /* Are we done? If so, disable the event source for EPOLLIN */ | |
399 | if (s->n_read >= sizeof(s->read_size) + be16toh(s->read_size)) { | |
623a4c97 LP |
400 | /* If there's a packet handler |
401 | * installed, call that. Note that | |
402 | * this is optional... */ | |
98767d75 IT |
403 | if (s->on_packet) { |
404 | r = s->on_packet(s); | |
405 | if (r < 0) | |
406 | return r; | |
407 | } | |
408 | ||
409 | r = dns_stream_update_io(s); | |
410 | if (r < 0) | |
411 | return dns_stream_complete(s, -r); | |
623a4c97 LP |
412 | } |
413 | } | |
414 | } | |
415 | ||
416 | if ((s->write_packet && s->n_written >= sizeof(s->write_size) + s->write_packet->size) && | |
417 | (s->read_packet && s->n_read >= sizeof(s->read_size) + s->read_packet->size)) | |
b914e211 | 418 | return dns_stream_complete(s, 0); |
623a4c97 LP |
419 | |
420 | return 0; | |
421 | } | |
422 | ||
8301aa0b | 423 | static DnsStream *dns_stream_free(DnsStream *s) { |
98767d75 IT |
424 | DnsPacket *p; |
425 | Iterator i; | |
426 | ||
8301aa0b | 427 | assert(s); |
b30bf55d | 428 | |
623a4c97 LP |
429 | dns_stream_stop(s); |
430 | ||
98767d75 IT |
431 | if (s->server && s->server->stream == s) |
432 | s->server->stream = NULL; | |
433 | ||
623a4c97 LP |
434 | if (s->manager) { |
435 | LIST_REMOVE(streams, s->manager->dns_streams, s); | |
436 | s->manager->n_dns_streams--; | |
437 | } | |
438 | ||
56ddbf10 | 439 | #if ENABLE_DNS_OVER_TLS |
6016fcb0 IT |
440 | if (s->encrypted) |
441 | dnstls_stream_free(s); | |
5d67a7ae IT |
442 | #endif |
443 | ||
98767d75 IT |
444 | ORDERED_SET_FOREACH(p, s->write_queue, i) |
445 | dns_packet_unref(ordered_set_remove(s->write_queue, p)); | |
446 | ||
623a4c97 LP |
447 | dns_packet_unref(s->write_packet); |
448 | dns_packet_unref(s->read_packet); | |
98767d75 IT |
449 | dns_server_unref(s->server); |
450 | ||
451 | ordered_set_free(s->write_queue); | |
623a4c97 | 452 | |
6b430fdb | 453 | return mfree(s); |
623a4c97 LP |
454 | } |
455 | ||
8301aa0b | 456 | DEFINE_TRIVIAL_REF_UNREF_FUNC(DnsStream, dns_stream, dns_stream_free); |
623a4c97 | 457 | |
b27a32a0 LP |
458 | int dns_stream_new( |
459 | Manager *m, | |
460 | DnsStream **ret, | |
461 | DnsProtocol protocol, | |
462 | int fd, | |
463 | const union sockaddr_union *tfo_address) { | |
464 | ||
b30bf55d | 465 | _cleanup_(dns_stream_unrefp) DnsStream *s = NULL; |
623a4c97 LP |
466 | int r; |
467 | ||
468 | assert(m); | |
499aa1d3 | 469 | assert(ret); |
623a4c97 LP |
470 | assert(fd >= 0); |
471 | ||
472 | if (m->n_dns_streams > DNS_STREAMS_MAX) | |
473 | return -EBUSY; | |
474 | ||
898892e8 | 475 | s = new(DnsStream, 1); |
623a4c97 LP |
476 | if (!s) |
477 | return -ENOMEM; | |
478 | ||
898892e8 LP |
479 | *s = (DnsStream) { |
480 | .n_ref = 1, | |
481 | .fd = -1, | |
482 | .protocol = protocol, | |
483 | }; | |
484 | ||
98767d75 IT |
485 | r = ordered_set_ensure_allocated(&s->write_queue, &dns_packet_hash_ops); |
486 | if (r < 0) | |
487 | return r; | |
488 | ||
623a4c97 LP |
489 | r = sd_event_add_io(m->event, &s->io_event_source, fd, EPOLLIN, on_stream_io, s); |
490 | if (r < 0) | |
491 | return r; | |
492 | ||
aa4a9deb LP |
493 | (void) sd_event_source_set_description(s->io_event_source, "dns-stream-io"); |
494 | ||
9a015429 LP |
495 | r = sd_event_add_time( |
496 | m->event, | |
497 | &s->timeout_event_source, | |
498 | clock_boottime_or_monotonic(), | |
499 | now(clock_boottime_or_monotonic()) + DNS_STREAM_TIMEOUT_USEC, 0, | |
500 | on_stream_timeout, s); | |
623a4c97 LP |
501 | if (r < 0) |
502 | return r; | |
503 | ||
aa4a9deb LP |
504 | (void) sd_event_source_set_description(s->timeout_event_source, "dns-stream-timeout"); |
505 | ||
623a4c97 | 506 | LIST_PREPEND(streams, m->dns_streams, s); |
08e254c8 | 507 | m->n_dns_streams++; |
623a4c97 | 508 | s->manager = m; |
08e254c8 | 509 | |
623a4c97 | 510 | s->fd = fd; |
08e254c8 | 511 | |
91ccab1e IT |
512 | if (tfo_address) { |
513 | s->tfo_address = *tfo_address; | |
514 | s->tfo_salen = tfo_address->sa.sa_family == AF_INET6 ? sizeof(tfo_address->in6) : sizeof(tfo_address->in); | |
515 | } | |
516 | ||
1cc6c93a | 517 | *ret = TAKE_PTR(s); |
623a4c97 LP |
518 | |
519 | return 0; | |
520 | } | |
521 | ||
522 | int dns_stream_write_packet(DnsStream *s, DnsPacket *p) { | |
98767d75 IT |
523 | int r; |
524 | ||
623a4c97 | 525 | assert(s); |
499aa1d3 | 526 | assert(p); |
623a4c97 | 527 | |
98767d75 IT |
528 | r = ordered_set_put(s->write_queue, p); |
529 | if (r < 0) | |
530 | return r; | |
623a4c97 | 531 | |
98767d75 | 532 | dns_packet_ref(p); |
623a4c97 LP |
533 | |
534 | return dns_stream_update_io(s); | |
535 | } | |
aa337a5e LP |
536 | |
537 | DnsPacket *dns_stream_take_read_packet(DnsStream *s) { | |
538 | assert(s); | |
539 | ||
540 | if (!s->read_packet) | |
541 | return NULL; | |
542 | ||
543 | if (s->n_read < sizeof(s->read_size)) | |
544 | return NULL; | |
545 | ||
546 | if (s->n_read < sizeof(s->read_size) + be16toh(s->read_size)) | |
547 | return NULL; | |
548 | ||
549 | s->n_read = 0; | |
550 | return TAKE_PTR(s->read_packet); | |
551 | } |