Commit | Line | Data |
---|---|---|
2fe58dfd SE |
1 | /* UDP send/receive module for secnet */ |
2 | ||
c215a4bc IJ |
3 | /* |
4 | * This file is part of secnet. | |
5 | * See README for full list of copyright holders. | |
6 | * | |
7 | * secnet is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version d of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * secnet is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * version 3 along with secnet; if not, see | |
19 | * https://www.gnu.org/licenses/gpl.html. | |
20 | */ | |
21 | ||
2fe58dfd SE |
22 | /* This module enables sites to communicate by sending UDP |
23 | * packets. When an instance of the module is created we can | |
24 | * optionally bind to a particular local IP address (not implemented | |
25 | * yet). | |
26 | * | |
2fe58dfd SE |
27 | * Packets are offered to registered receivers in turn. Once one |
28 | * accepts it, it isn't offered to any more. */ | |
29 | ||
8689b3a9 | 30 | #include "secnet.h" |
2fe58dfd SE |
31 | #include <stdio.h> |
32 | #include <unistd.h> | |
33 | #include <fcntl.h> | |
34 | #include <string.h> | |
35 | #include <errno.h> | |
2fe58dfd | 36 | #include <sys/socket.h> |
b2a56f7c | 37 | #include <sys/wait.h> |
5edf478f IJ |
38 | #include <netinet/in.h> |
39 | #include <arpa/inet.h> | |
2fe58dfd | 40 | #include "util.h" |
dd9209d1 | 41 | #include "magic.h" |
794f2398 | 42 | #include "unaligned.h" |
ff05a229 | 43 | #include "ipaddr.h" |
136740e6 | 44 | #include "magic.h" |
54d5ef00 | 45 | #include "comm-common.h" |
2fe58dfd | 46 | |
2fe58dfd SE |
47 | static comm_sendmsg_fn udp_sendmsg; |
48 | ||
2fe58dfd | 49 | struct udp { |
763e458f IJ |
50 | struct udpcommon uc; |
51 | struct udpsocks socks; | |
93910f6a | 52 | bool_t addr_configured; |
571db148 | 53 | unsigned counter; |
2fe58dfd SE |
54 | }; |
55 | ||
08b62a6c IJ |
56 | /* |
57 | * Re comm_addr.ix: This field allows us to note in the comm_addr | |
58 | * which socket an incoming packet was received on. This is required | |
59 | * for conveniently logging the actual source of a packet. But the ix | |
60 | * does not formally form part of the address: it is not used when | |
61 | * sending, nor when comparing two comm_addrs. | |
62 | * | |
63 | * The special value -1 means that the comm_addr was constructed by | |
64 | * another module in secnet (eg the resolver), rather than being a | |
65 | * description of the source of an incoming packet. | |
66 | */ | |
67 | ||
54d5ef00 IJ |
68 | static const char *udp_addr_to_string(void *commst, const struct comm_addr *ca) |
69 | { | |
5edf478f | 70 | struct udp *st=commst; |
763e458f | 71 | struct udpsocks *socks=&st->socks; |
5edf478f | 72 | static char sbuf[100]; |
08b62a6c | 73 | int ix=ca->ix>=0 ? ca->ix : 0; |
5edf478f | 74 | |
7d31df0e | 75 | assert(ix>=0 && ix<socks->n_socks); |
571db148 IJ |
76 | snprintf(sbuf, sizeof(sbuf), "udp#%u@l%d:%s%s-%s", |
77 | st->counter, st->uc.cc.loc.line, | |
7d31df0e | 78 | iaddr_to_string(&socks->socks[ix].addr), |
bfc34aff | 79 | ca->ix<0 && socks->n_socks>1 ? "&" : "", |
08b62a6c | 80 | iaddr_to_string(&ca->ia)); |
5edf478f IJ |
81 | return sbuf; |
82 | } | |
83 | ||
f7af3192 IJ |
84 | static int udp_socks_beforepoll(void *state, struct pollfd *fds, int *nfds_io, |
85 | int *timeout_io) | |
2fe58dfd | 86 | { |
f7af3192 | 87 | struct udpsocks *socks=state; |
08b62a6c | 88 | int i; |
7d31df0e IJ |
89 | BEFOREPOLL_WANT_FDS(socks->n_socks); |
90 | for (i=0; i<socks->n_socks; i++) { | |
91 | fds[i].fd=socks->socks[i].fd; | |
08b62a6c IJ |
92 | fds[i].events=POLLIN; |
93 | } | |
2fe58dfd SE |
94 | return 0; |
95 | } | |
96 | ||
2d7478f7 IJ |
97 | const char *af_name(int af) |
98 | { | |
99 | switch (af) { | |
100 | case AF_INET6: return "IPv6"; | |
101 | case AF_INET: return "IPv4"; | |
102 | case 0: return "(any)"; | |
103 | default: abort(); | |
104 | } | |
105 | } | |
106 | ||
107 | void udp_sock_experienced(struct log_if *lg, struct udpcommon *uc, | |
c72d679d | 108 | struct udpsocks *socks, struct udpsock *us, |
6c5889e6 | 109 | const union iaddr *dest, int af, |
2d7478f7 IJ |
110 | int r, int errnoval) |
111 | { | |
112 | bool_t success=r>=0; | |
6c5889e6 | 113 | if (us->experienced[!!dest][af][success]++) |
2d7478f7 IJ |
114 | return; |
115 | lg_perror(lg, uc->cc.cl.description, &uc->cc.loc, | |
116 | success ? M_INFO : M_WARNING, | |
117 | success ? 0 : errnoval, | |
6c5889e6 | 118 | "%s %s experiencing some %s %s%s%s%s%s%s", |
c72d679d | 119 | socks->desc,iaddr_to_string(&us->addr), |
2d7478f7 | 120 | success?"success":"trouble", |
6c5889e6 IJ |
121 | dest?"transmitting":"receiving", |
122 | af?" ":"", af?af_name(af):"", | |
123 | dest?" (to ":"", | |
124 | dest?iaddr_to_string(dest):"", | |
125 | dest?")":""); | |
2d7478f7 IJ |
126 | } |
127 | ||
f7af3192 | 128 | static void udp_socks_afterpoll(void *state, struct pollfd *fds, int nfds) |
763e458f | 129 | { |
f7af3192 IJ |
130 | struct udpsocks *socks=state; |
131 | struct udpcommon *uc=socks->uc; | |
a32d56fb | 132 | union iaddr from; |
b1a0f651 | 133 | socklen_t fromlen; |
2fe58dfd SE |
134 | bool_t done; |
135 | int rv; | |
08b62a6c | 136 | int i; |
2fe58dfd | 137 | |
763e458f IJ |
138 | struct commcommon *cc=&uc->cc; |
139 | ||
140 | for (i=0; i<socks->n_socks; i++) { | |
56c8ed69 | 141 | struct udpsock *us=&socks->socks[i]; |
08b62a6c IJ |
142 | if (i>=nfds) continue; |
143 | if (!(fds[i].revents & POLLIN)) continue; | |
56c8ed69 IJ |
144 | assert(fds[i].fd == us->fd); |
145 | int fd=us->fd; | |
2fe58dfd SE |
146 | do { |
147 | fromlen=sizeof(from); | |
7d31df0e IJ |
148 | BUF_ASSERT_FREE(cc->rbuf); |
149 | BUF_ALLOC(cc->rbuf,"udp_afterpoll"); | |
150 | buffer_init(cc->rbuf,calculate_max_start_pad()); | |
151 | rv=recvfrom(fd, cc->rbuf->start, | |
152 | buf_remaining_space(cc->rbuf), | |
a32d56fb | 153 | 0, &from.sa, &fromlen); |
2fe58dfd | 154 | if (rv>0) { |
7d31df0e IJ |
155 | cc->rbuf->size=rv; |
156 | if (uc->use_proxy) { | |
ff05a229 SE |
157 | /* Check that the packet came from our poxy server; |
158 | we shouldn't be contacted directly by anybody else | |
159 | (since they can trivially forge source addresses) */ | |
9c44ef13 | 160 | if (!iaddr_equal(&from,&uc->proxy,False)) { |
ff05a229 SE |
161 | Message(M_INFO,"udp: received packet that's not " |
162 | "from the proxy\n"); | |
7d31df0e | 163 | BUF_FREE(cc->rbuf); |
ff05a229 SE |
164 | continue; |
165 | } | |
a32d56fb IJ |
166 | /* proxy protocol supports ipv4 transport only */ |
167 | from.sa.sa_family=AF_INET; | |
c1ddd026 | 168 | BUF_GET_BYTES(unprepend,cc->rbuf,&from.sin.sin_addr,4); |
7d31df0e | 169 | buf_unprepend(cc->rbuf,2); |
c1ddd026 | 170 | BUF_GET_BYTES(unprepend,cc->rbuf,&from.sin.sin_port,2); |
ff05a229 | 171 | } |
8534d602 | 172 | struct comm_addr ca; |
7d31df0e | 173 | ca.comm=&cc->ops; |
a32d56fb | 174 | ca.ia=from; |
08b62a6c | 175 | ca.ix=i; |
54d5ef00 | 176 | done=comm_notify(&cc->notify, cc->rbuf, &ca); |
c72d679d IJ |
177 | if (done) { |
178 | udp_sock_experienced(0,uc,socks,us,0, | |
179 | from.sa.sa_family,0,0); | |
180 | } else { | |
bf28fc73 | 181 | uint32_t msgtype; |
7d31df0e IJ |
182 | if (cc->rbuf->size>12 /* prevents traffic amplification */ |
183 | && ((msgtype=get_uint32(cc->rbuf->start+8)) | |
bf28fc73 IJ |
184 | != LABEL_NAK)) { |
185 | uint32_t source,dest; | |
186 | /* Manufacture and send NAK packet */ | |
7d31df0e IJ |
187 | source=get_uint32(cc->rbuf->start); /* Us */ |
188 | dest=get_uint32(cc->rbuf->start+4); /* Them */ | |
189 | send_nak(&ca,source,dest,msgtype,cc->rbuf,"unwanted"); | |
bf28fc73 | 190 | } |
7d31df0e | 191 | BUF_FREE(cc->rbuf); |
2fe58dfd | 192 | } |
7d31df0e | 193 | BUF_ASSERT_FREE(cc->rbuf); |
56c8ed69 | 194 | } else { /* rv<=0 */ |
2d7478f7 | 195 | if (errno!=EINTR && !iswouldblock(errno)) |
c72d679d | 196 | udp_sock_experienced(0,uc,socks,us, 0,0, rv,errno); |
7d31df0e | 197 | BUF_FREE(cc->rbuf); |
2fe58dfd SE |
198 | } |
199 | } while (rv>=0); | |
200 | } | |
201 | } | |
202 | ||
2fe58dfd | 203 | static bool_t udp_sendmsg(void *commst, struct buffer_if *buf, |
a15faeb2 | 204 | const struct comm_addr *dest) |
2fe58dfd SE |
205 | { |
206 | struct udp *st=commst; | |
763e458f IJ |
207 | struct udpcommon *uc=&st->uc; |
208 | struct udpsocks *socks=&st->socks; | |
ff05a229 | 209 | uint8_t *sa; |
2fe58dfd | 210 | |
7d31df0e | 211 | if (uc->use_proxy) { |
56c8ed69 | 212 | struct udpsock *us=&socks->socks[0]; |
3abd18e8 | 213 | sa=buf_prepend(buf,8); |
a32d56fb IJ |
214 | if (dest->ia.sa.sa_family != AF_INET) { |
215 | Message(M_INFO, | |
216 | "udp: proxy means dropping outgoing non-IPv4 packet to %s\n", | |
217 | iaddr_to_string(&dest->ia)); | |
218 | return False; | |
219 | } | |
220 | memcpy(sa,&dest->ia.sin.sin_addr,4); | |
ff05a229 | 221 | memset(sa+4,0,4); |
a32d56fb | 222 | memcpy(sa+6,&dest->ia.sin.sin_port,2); |
2d7478f7 | 223 | int r=sendto(us->fd,sa,buf->size+8,0,&uc->proxy.sa, |
7d31df0e | 224 | iaddr_socklen(&uc->proxy)); |
6c5889e6 | 225 | udp_sock_experienced(0,uc,socks,us, &dest->ia,0, r,errno); |
3abd18e8 | 226 | buf_unprepend(buf,8); |
ff05a229 | 227 | } else { |
08b62a6c IJ |
228 | int i,r; |
229 | bool_t allunsupported=True; | |
56c8ed69 | 230 | int af=dest->ia.sa.sa_family; |
7d31df0e | 231 | for (i=0; i<socks->n_socks; i++) { |
56c8ed69 IJ |
232 | struct udpsock *us=&socks->socks[i]; |
233 | if (us->addr.sa.sa_family != af) | |
08b62a6c IJ |
234 | /* no point even trying */ |
235 | continue; | |
56c8ed69 | 236 | r=sendto(us->fd, buf->start, buf->size, 0, |
08b62a6c | 237 | &dest->ia.sa, iaddr_socklen(&dest->ia)); |
6c5889e6 | 238 | udp_sock_experienced(0,uc,socks,us, &dest->ia,af, r,errno); |
08b62a6c IJ |
239 | if (r>=0) return True; |
240 | if (!(errno==EAFNOSUPPORT || errno==ENETUNREACH)) | |
241 | /* who knows what that error means? */ | |
242 | allunsupported=False; | |
243 | } | |
244 | return !allunsupported; /* see doc for comm_sendmsg_fn in secnet.h */ | |
ff05a229 | 245 | } |
2fe58dfd SE |
246 | |
247 | return True; | |
248 | } | |
249 | ||
5f8b7a8e IJ |
250 | void udp_destroy_socket(struct udpcommon *uc, struct udpsock *us) |
251 | { | |
252 | if (us->fd>=0) { | |
253 | close(us->fd); | |
254 | us->fd=-1; | |
255 | } | |
256 | } | |
257 | ||
9c44ef13 IJ |
258 | #define FAIL_LG 0, cc->cl.description, &cc->loc, failmsgclass |
259 | #define FAIL(...) do{ \ | |
260 | lg_perror(FAIL_LG,errno,__VA_ARGS__); \ | |
261 | goto failed; \ | |
262 | }while(0) | |
263 | ||
264 | static bool_t record_socket_gotaddr(struct udpcommon *uc, struct udpsock *us, | |
265 | int failmsgclass) | |
266 | { | |
267 | struct commcommon *cc=&uc->cc; | |
268 | socklen_t salen=sizeof(us->addr); | |
269 | int r=getsockname(us->fd,&us->addr.sa,&salen); | |
270 | if (r) FAIL("getsockname()"); | |
271 | if (salen>sizeof(us->addr)) { errno=0; FAIL("getsockname() length"); } | |
272 | return True; | |
273 | ||
274 | failed: | |
275 | return False; | |
276 | } | |
277 | ||
278 | bool_t udp_import_socket(struct udpcommon *uc, struct udpsock *us, | |
279 | int failmsgclass, int fd) | |
280 | { | |
281 | FILLZERO(us->experienced); | |
282 | us->fd=fd; | |
283 | return record_socket_gotaddr(uc,us,failmsgclass); | |
284 | } | |
285 | ||
53f4e666 IJ |
286 | bool_t udp_make_socket(struct udpcommon *uc, struct udpsock *us, |
287 | int failmsgclass) | |
baa06aeb | 288 | { |
f164f167 | 289 | const union iaddr *addr=&us->addr; |
763e458f | 290 | struct commcommon *cc=&uc->cc; |
53f4e666 IJ |
291 | us->fd=-1; |
292 | ||
2d7478f7 | 293 | FILLZERO(us->experienced); |
08b62a6c | 294 | us->fd=socket(addr->sa.sa_family, SOCK_DGRAM, IPPROTO_UDP); |
53f4e666 | 295 | if (us->fd<0) FAIL("socket"); |
f54d5ada | 296 | setnonblock(us->fd); |
f164f167 | 297 | setcloexec(us->fd); |
08b62a6c IJ |
298 | #ifdef CONFIG_IPV6 |
299 | if (addr->sa.sa_family==AF_INET6) { | |
300 | int r; | |
301 | int optval=1; | |
302 | socklen_t optlen=sizeof(optval); | |
303 | r=setsockopt(us->fd,IPPROTO_IPV6,IPV6_V6ONLY,&optval,optlen); | |
53f4e666 | 304 | if (r) FAIL("setsockopt(,IPV6_V6ONLY,&1,)"); |
08b62a6c IJ |
305 | } |
306 | #endif | |
baa06aeb | 307 | |
7d31df0e | 308 | if (uc->authbind) { |
b2a56f7c SE |
309 | pid_t c; |
310 | int status; | |
eea14dc2 IJ |
311 | char desc[200]; |
312 | snprintf(desc,sizeof(desc),"authbind for %s: %s", | |
313 | iaddr_to_string(addr), uc->authbind); | |
b2a56f7c SE |
314 | |
315 | /* XXX this fork() and waitpid() business needs to be hidden | |
316 | in some system-specific library functions. */ | |
317 | c=fork(); | |
53f4e666 IJ |
318 | if (c==-1) |
319 | FAIL("fork() for authbind"); | |
b2a56f7c | 320 | if (c==0) { |
3ff31eda IJ |
321 | char *argv[5], addrstr[33], portstr[5]; |
322 | const char *addrfam; | |
323 | int port; | |
5e7a5e2d | 324 | afterfork(); |
f164f167 | 325 | switch (addr->sa.sa_family) { |
a32d56fb | 326 | case AF_INET: |
f164f167 | 327 | sprintf(addrstr,"%08lX",(long)addr->sin.sin_addr.s_addr); |
3ff31eda IJ |
328 | port=addr->sin.sin_port; |
329 | addrfam=NULL; | |
a32d56fb | 330 | break; |
3ff31eda IJ |
331 | #ifdef CONFIG_IPV6 |
332 | case AF_INET6: { | |
333 | int i; | |
334 | for (i=0; i<16; i++) | |
335 | sprintf(addrstr+i*2,"%02X",addr->sin6.sin6_addr.s6_addr[i]); | |
336 | port=addr->sin6.sin6_port; | |
337 | addrfam="6"; | |
338 | break; | |
339 | } | |
340 | #endif /*CONFIG_IPV6*/ | |
a32d56fb IJ |
341 | default: |
342 | fatal("udp (%s:%d): unsupported address family for authbind", | |
7d31df0e | 343 | cc->loc.file,cc->loc.line); |
a32d56fb | 344 | } |
3ff31eda | 345 | sprintf(portstr,"%04X",port); |
7d31df0e | 346 | argv[0]=uc->authbind; |
3b83c932 SE |
347 | argv[1]=addrstr; |
348 | argv[2]=portstr; | |
3ff31eda IJ |
349 | argv[3]=(char*)addrfam; |
350 | argv[4]=NULL; | |
f164f167 | 351 | dup2(us->fd,0); |
7d31df0e | 352 | execvp(uc->authbind,argv); |
3b83c932 | 353 | _exit(255); |
b2a56f7c | 354 | } |
3b83c932 SE |
355 | while (waitpid(c,&status,0)==-1) { |
356 | if (errno==EINTR) continue; | |
53f4e666 | 357 | FAIL("waitpid for authbind"); |
b2a56f7c | 358 | } |
4ac7fd3f | 359 | if (status) { |
313e4f0f IJ |
360 | if (WIFEXITED(status) && WEXITSTATUS(status)<127) { |
361 | int es=WEXITSTATUS(status); | |
362 | lg_perror(FAIL_LG,es, | |
eea14dc2 IJ |
363 | "%s exited with error exit status %d;" |
364 | " indicates error",desc,es); | |
313e4f0f | 365 | } else { |
eea14dc2 | 366 | lg_exitstatus(FAIL_LG,status,desc); |
313e4f0f | 367 | } |
53f4e666 | 368 | goto failed; |
3b83c932 | 369 | } |
b2a56f7c | 370 | } else { |
53f4e666 IJ |
371 | if (bind(us->fd, &addr->sa, iaddr_socklen(addr))!=0) |
372 | FAIL("bind (%s)",iaddr_to_string(addr)); | |
baa06aeb | 373 | } |
9c44ef13 IJ |
374 | |
375 | bool_t ok=record_socket_gotaddr(uc,us,failmsgclass); | |
376 | if (!ok) goto failed; | |
377 | ||
53f4e666 IJ |
378 | return True; |
379 | ||
380 | failed: | |
5f8b7a8e | 381 | udp_destroy_socket(uc,us); |
53f4e666 | 382 | return False; |
9c44ef13 | 383 | } |
53f4e666 IJ |
384 | |
385 | #undef FAIL | |
baa06aeb | 386 | |
c72d679d IJ |
387 | void udp_socks_register(struct udpcommon *uc, struct udpsocks *socks, |
388 | const char *desc) | |
f7af3192 IJ |
389 | { |
390 | socks->uc=uc; | |
c72d679d | 391 | socks->desc=desc; |
5c679ae0 IJ |
392 | socks->interest= |
393 | register_for_poll(socks,udp_socks_beforepoll,udp_socks_afterpoll,"udp"); | |
394 | } | |
395 | ||
396 | void udp_socks_deregister(struct udpcommon *uc, struct udpsocks *socks) | |
397 | { | |
398 | socks->uc=uc; | |
399 | deregister_for_poll(socks->interest); | |
f7af3192 IJ |
400 | } |
401 | ||
32654a31 IJ |
402 | void udp_socks_childpersist(struct udpcommon *uc, struct udpsocks *socks) |
403 | { | |
404 | int i; | |
405 | for (i=0; i<socks->n_socks; i++) | |
406 | udp_destroy_socket(uc,&socks->socks[i]); | |
407 | } | |
408 | ||
409 | static void udp_childpersist_hook(void *sst, uint32_t new_phase) | |
410 | { | |
411 | struct udp *st=sst; | |
412 | udp_socks_childpersist(&st->uc,&st->socks); | |
413 | } | |
414 | ||
f164f167 IJ |
415 | static void udp_phase_hook(void *sst, uint32_t new_phase) |
416 | { | |
417 | struct udp *st=sst; | |
763e458f | 418 | struct udpsocks *socks=&st->socks; |
f7af3192 | 419 | struct udpcommon *uc=&st->uc; |
08b62a6c | 420 | int i; |
b3877445 IJ |
421 | bool_t anydone=0; |
422 | ||
423 | for (i=0; i<socks->n_socks; i++) { | |
424 | bool_t required=st->addr_configured | |
425 | || (!anydone && i==socks->n_socks-1); | |
426 | anydone += udp_make_socket(uc,&socks->socks[i], | |
427 | required ? M_FATAL : M_WARNING); | |
428 | } | |
08b62a6c | 429 | |
c72d679d | 430 | udp_socks_register(uc,socks, uc->use_proxy ? "proxy" : "socket"); |
32654a31 IJ |
431 | |
432 | add_hook(PHASE_CHILDPERSIST,udp_childpersist_hook,st); | |
baa06aeb SE |
433 | } |
434 | ||
2fe58dfd SE |
435 | static list_t *udp_apply(closure_t *self, struct cloc loc, dict_t *context, |
436 | list_t *args) | |
437 | { | |
571db148 IJ |
438 | static unsigned counter; |
439 | ||
2fe58dfd | 440 | struct udp *st; |
08b62a6c | 441 | list_t *caddrl; |
ff05a229 SE |
442 | list_t *l; |
443 | uint32_t a; | |
08b62a6c | 444 | int i; |
2fe58dfd | 445 | |
763e458f IJ |
446 | COMM_APPLY(st,&st->uc.cc,udp_,"udp",loc); |
447 | COMM_APPLY_STANDARD(st,&st->uc.cc,"udp",args); | |
448 | UDP_APPLY_STANDARD(st,&st->uc,"udp"); | |
2fe58dfd | 449 | |
763e458f IJ |
450 | struct udpcommon *uc=&st->uc; |
451 | struct udpsocks *socks=&st->socks; | |
452 | struct commcommon *cc=&uc->cc; | |
08b62a6c | 453 | |
571db148 IJ |
454 | st->counter=counter++; |
455 | ||
08b62a6c IJ |
456 | union iaddr defaultaddrs[] = { |
457 | #ifdef CONFIG_IPV6 | |
458 | { .sin6 = { .sin6_family=AF_INET6, | |
763e458f | 459 | .sin6_port=htons(uc->port), |
08b62a6c IJ |
460 | .sin6_addr=IN6ADDR_ANY_INIT } }, |
461 | #endif | |
462 | { .sin = { .sin_family=AF_INET, | |
763e458f | 463 | .sin_port=htons(uc->port), |
08b62a6c IJ |
464 | .sin_addr= { .s_addr=INADDR_ANY } } } |
465 | }; | |
466 | ||
467 | caddrl=dict_lookup(d,"address"); | |
93910f6a IJ |
468 | st->addr_configured=!!caddrl; |
469 | socks->n_socks=st->addr_configured ? list_length(caddrl) | |
470 | : (int)ARRAY_SIZE(defaultaddrs); | |
7d31df0e IJ |
471 | if (socks->n_socks<=0 || socks->n_socks>UDP_MAX_SOCKETS) |
472 | cfgfatal(cc->loc,"udp","`address' must be 1..%d addresses", | |
473 | UDP_MAX_SOCKETS); | |
08b62a6c | 474 | |
7d31df0e IJ |
475 | for (i=0; i<socks->n_socks; i++) { |
476 | struct udpsock *us=&socks->socks[i]; | |
93910f6a | 477 | if (!st->addr_configured) { |
08b62a6c IJ |
478 | us->addr=defaultaddrs[i]; |
479 | } else { | |
763e458f | 480 | string_item_to_iaddr(list_elem(caddrl,i),uc->port,&us->addr,"udp"); |
08b62a6c IJ |
481 | } |
482 | us->fd=-1; | |
483 | } | |
484 | ||
ff05a229 SE |
485 | l=dict_lookup(d,"proxy"); |
486 | if (l) { | |
7d31df0e IJ |
487 | uc->use_proxy=True; |
488 | uc->proxy.sa.sa_family=AF_INET; | |
c649eafe IJ |
489 | item=list_elem(l,0); |
490 | if (!item || item->type!=t_string) { | |
7d31df0e | 491 | cfgfatal(cc->loc,"udp","proxy must supply ""addr"",port\n"); |
ff05a229 | 492 | } |
c649eafe | 493 | a=string_item_to_ipaddr(item,"proxy"); |
7d31df0e | 494 | uc->proxy.sin.sin_addr.s_addr=htonl(a); |
c649eafe IJ |
495 | item=list_elem(l,1); |
496 | if (!item || item->type!=t_number) { | |
7d31df0e | 497 | cfgfatal(cc->loc,"udp","proxy must supply ""addr"",port\n"); |
ff05a229 | 498 | } |
7d31df0e | 499 | uc->proxy.sin.sin_port=htons(item->data.number); |
ff05a229 | 500 | } |
2fe58dfd | 501 | |
7d31df0e | 502 | update_max_start_pad(&comm_max_start_pad, uc->use_proxy ? 8 : 0); |
3abd18e8 | 503 | |
baa06aeb | 504 | add_hook(PHASE_GETRESOURCES,udp_phase_hook,st); |
2fe58dfd | 505 | |
7d31df0e | 506 | return new_closure(&cc->cl); |
2fe58dfd SE |
507 | } |
508 | ||
2fe58dfd SE |
509 | void udp_module(dict_t *dict) |
510 | { | |
511 | add_closure(dict,"udp",udp_apply); | |
512 | } |