d3372da9 |
1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client |
3 | * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com) |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ |
19 | /* XXX: Implement SOCKS proxyability */ |
20 | |
21 | #ifdef HAVE_CONFIG_H |
22 | #include <config.h> |
23 | #endif |
24 | #include <string.h> |
25 | #include <stdlib.h> |
26 | #include <unistd.h> |
27 | #include <fcntl.h> |
28 | #include <sys/ioctl.h> |
29 | #include <sys/socket.h> |
30 | #include <sys/un.h> |
31 | #include <sys/poll.h> |
32 | #include <arpa/inet.h> |
33 | #include <netinet/in.h> |
34 | #include <netdb.h> |
35 | #include <sys/signal.h> |
d3372da9 |
36 | #ifdef HAVE_LINUX_SOCKIOS_H |
37 | #include <linux/sockios.h> |
38 | #endif |
39 | #include <errno.h> |
40 | #include <net/if.h> |
41 | |
42 | #include "conf.h" |
43 | #include "net.h" |
44 | #include "module.h" |
45 | #include "log.h" |
46 | #include "utils.h" |
47 | #include "sysevents.h" |
48 | |
49 | static struct configvar myvars[] = |
50 | { |
d9f89ef5 |
51 | /** The network mode to use. Currently supported values are 0 for |
52 | * active mode and 1 for passive mode. In the future, SOCKS5 proxy |
53 | * support may be added. */ |
d3372da9 |
54 | {CONF_VAR_INT, "mode", {.num = 0}}, |
d9f89ef5 |
55 | /** Set the SO_REUSEADDR socket option on listening sockets, so |
56 | * that dead TCP connections waiting for timeout are ignored. */ |
347d6d76 |
57 | {CONF_VAR_BOOL, "reuseaddr", {.num = 0}}, |
d9f89ef5 |
58 | /** Overrides the IPv4 address reported to other clients in active |
59 | * mode. Useful for servers behind NAT routers. If both this and |
60 | * net.publicif are unspecified the address of the hub connection |
61 | * is used. */ |
d3372da9 |
62 | {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}}, |
d9f89ef5 |
63 | /** Specifies an interface name from which to fetch the IPv4 |
64 | * address reported to other clients in active mode. If both this |
65 | * and net.visibleipv4 are unspecified the address of the hub |
66 | * connection is used. */ |
d3372da9 |
67 | {CONF_VAR_STRING, "publicif", {.str = L""}}, |
b020fb3d |
68 | /* Diffserv should be supported on IPv4, too, but I don't know the |
69 | * API to do that. */ |
d9f89ef5 |
70 | /** The Diffserv value to use on IPv6 connections when the |
71 | * minimize cost TOS value is used (see the TOS VALUES |
72 | * section). */ |
b020fb3d |
73 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
d9f89ef5 |
74 | /** The Diffserv value to use on IPv6 connections when the |
75 | * maximize reliability TOS value is used (see the TOS VALUES |
76 | * section). */ |
b020fb3d |
77 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
d9f89ef5 |
78 | /** The Diffserv value to use on IPv6 connections when the |
79 | * maximize throughput TOS value is used (see the TOS VALUES |
80 | * section). */ |
b020fb3d |
81 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
d9f89ef5 |
82 | /** The Diffserv value to use on IPv6 connections when the |
83 | * minimize delay TOS value is used (see the TOS VALUES |
84 | * section). */ |
b020fb3d |
85 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
d3372da9 |
86 | {CONF_VAR_END} |
87 | }; |
88 | |
89 | static struct socket *sockets = NULL; |
90 | int numsocks = 0; |
91 | |
92 | /* XXX: Get autoconf for all this... */ |
93 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) |
94 | { |
95 | struct sockaddr_in *ipv4; |
96 | struct configvar *var; |
97 | void *bufend; |
98 | int sock; |
99 | struct ifconf conf; |
100 | struct ifreq *ifr, req; |
101 | char *pif; |
102 | |
103 | if(af == AF_INET) |
104 | { |
105 | var = confgetvar("net", "visibleipv4"); |
106 | if(var->val.ipv4.s_addr != 0) |
107 | { |
108 | ipv4 = smalloc(sizeof(*ipv4)); |
109 | ipv4->sin_family = AF_INET; |
110 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; |
111 | *addr = (struct sockaddr *)ipv4; |
112 | *lenbuf = sizeof(*ipv4); |
113 | return(0); |
114 | } |
bcb73bb3 |
115 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 |
116 | { |
117 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); |
118 | return(-1); |
119 | } |
6fb0c6ac |
120 | if(!strcmp(pif, "")) |
121 | return(1); |
d3372da9 |
122 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
123 | return(-1); |
124 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); |
125 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) |
126 | { |
127 | free(conf.ifc_buf); |
128 | close(sock); |
129 | return(-1); |
130 | } |
131 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; |
132 | ipv4 = NULL; |
133 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) |
134 | { |
1315d02a |
135 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac |
136 | continue; |
d3372da9 |
137 | memset(&req, 0, sizeof(req)); |
138 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); |
139 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) |
6fb0c6ac |
140 | break; |
141 | if(!(req.ifr_flags & IFF_UP)) |
d3372da9 |
142 | { |
6fb0c6ac |
143 | flog(LOG_WARNING, "public interface is down"); |
144 | break; |
d3372da9 |
145 | } |
6fb0c6ac |
146 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 |
147 | { |
6fb0c6ac |
148 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
149 | break; |
d3372da9 |
150 | } |
6fb0c6ac |
151 | ipv4 = smalloc(sizeof(*ipv4)); |
152 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); |
153 | break; |
d3372da9 |
154 | } |
bcb73bb3 |
155 | free(conf.ifc_buf); |
d3372da9 |
156 | close(sock); |
157 | if(ipv4 != NULL) |
158 | { |
159 | *addr = (struct sockaddr *)ipv4; |
160 | *lenbuf = sizeof(*ipv4); |
161 | return(0); |
162 | } |
163 | errno = ENETDOWN; |
164 | return(-1); |
165 | } |
6fb0c6ac |
166 | return(1); |
d3372da9 |
167 | } |
168 | |
169 | static struct socket *newsock(int type) |
170 | { |
171 | struct socket *new; |
172 | |
173 | new = smalloc(sizeof(*new)); |
174 | new->refcount = 2; |
175 | new->fd = -1; |
176 | new->isrealsocket = 1; |
177 | new->family = -1; |
178 | new->tos = 0; |
179 | new->type = type; |
180 | new->state = -1; |
181 | new->ignread = 0; |
182 | new->close = 0; |
183 | new->remote = NULL; |
184 | new->remotelen = 0; |
185 | switch(type) |
186 | { |
187 | case SOCK_STREAM: |
188 | new->outbuf.s.buf = NULL; |
189 | new->outbuf.s.bufsize = 0; |
190 | new->outbuf.s.datasize = 0; |
191 | new->inbuf.s.buf = NULL; |
192 | new->inbuf.s.bufsize = 0; |
193 | new->inbuf.s.datasize = 0; |
194 | break; |
195 | case SOCK_DGRAM: |
196 | new->outbuf.d.f = new->outbuf.d.l = NULL; |
197 | new->inbuf.d.f = new->inbuf.d.l = NULL; |
198 | break; |
199 | } |
cab0b442 |
200 | new->conncb = NULL; |
201 | new->errcb = NULL; |
202 | new->readcb = NULL; |
203 | new->writecb = NULL; |
204 | new->acceptcb = NULL; |
d3372da9 |
205 | new->next = sockets; |
206 | new->prev = NULL; |
207 | if(sockets != NULL) |
208 | sockets->prev = new; |
209 | sockets = new; |
210 | numsocks++; |
211 | return(new); |
212 | } |
213 | |
214 | static struct socket *mksock(int domain, int type) |
215 | { |
216 | int fd; |
217 | struct socket *new; |
218 | |
219 | if((fd = socket(domain, type, 0)) < 0) |
220 | { |
221 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); |
222 | return(NULL); |
223 | } |
224 | new = newsock(type); |
225 | new->fd = fd; |
226 | new->family = domain; |
227 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
228 | return(new); |
229 | } |
230 | |
231 | struct socket *wrapsock(int fd) |
232 | { |
233 | struct socket *new; |
234 | |
235 | new = newsock(SOCK_STREAM); |
236 | new->fd = fd; |
237 | new->state = SOCK_EST; |
238 | new->isrealsocket = 0; |
239 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
240 | return(new); |
241 | } |
242 | |
243 | static void unlinksock(struct socket *sk) |
244 | { |
245 | if(sk->prev != NULL) |
246 | sk->prev->next = sk->next; |
247 | if(sk->next != NULL) |
248 | sk->next->prev = sk->prev; |
249 | if(sk == sockets) |
250 | sockets = sk->next; |
251 | putsock(sk); |
252 | numsocks--; |
253 | } |
254 | |
255 | void getsock(struct socket *sk) |
256 | { |
257 | sk->refcount++; |
258 | } |
259 | |
260 | void putsock(struct socket *sk) |
261 | { |
262 | struct dgrambuf *buf; |
263 | |
264 | if(--(sk->refcount) == 0) |
265 | { |
266 | switch(sk->type) |
267 | { |
268 | case SOCK_STREAM: |
269 | if(sk->outbuf.s.buf != NULL) |
270 | free(sk->outbuf.s.buf); |
271 | if(sk->inbuf.s.buf != NULL) |
272 | free(sk->inbuf.s.buf); |
273 | break; |
274 | case SOCK_DGRAM: |
275 | while((buf = sk->outbuf.d.f) != NULL) |
276 | { |
277 | sk->outbuf.d.f = buf->next; |
278 | free(buf->data); |
161604ea |
279 | free(buf->addr); |
d3372da9 |
280 | free(buf); |
281 | } |
282 | while((buf = sk->inbuf.d.f) != NULL) |
283 | { |
284 | sk->inbuf.d.f = buf->next; |
285 | free(buf->data); |
161604ea |
286 | free(buf->addr); |
d3372da9 |
287 | free(buf); |
288 | } |
289 | break; |
290 | } |
b870805e |
291 | closesock(sk); |
d3372da9 |
292 | if(sk->remote != NULL) |
293 | free(sk->remote); |
294 | free(sk); |
295 | } |
296 | } |
297 | |
336539c2 |
298 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
299 | { |
300 | switch(sk->type) |
301 | { |
302 | case SOCK_STREAM: |
303 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1); |
304 | memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize); |
305 | memcpy(sk->inbuf.s.buf, buf, size); |
306 | sk->inbuf.s.datasize += size; |
307 | break; |
308 | case SOCK_DGRAM: |
309 | /* XXX */ |
310 | break; |
311 | } |
312 | return; |
313 | } |
314 | |
d3372da9 |
315 | void *sockgetinbuf(struct socket *sk, size_t *size) |
316 | { |
317 | void *buf; |
318 | struct dgrambuf *dbuf; |
319 | |
320 | switch(sk->type) |
321 | { |
322 | case SOCK_STREAM: |
323 | if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0)) |
324 | { |
325 | *size = 0; |
326 | return(NULL); |
327 | } |
328 | buf = sk->inbuf.s.buf; |
329 | *size = sk->inbuf.s.datasize; |
330 | sk->inbuf.s.buf = NULL; |
331 | sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0; |
332 | return(buf); |
333 | case SOCK_DGRAM: |
334 | if((dbuf = sk->inbuf.d.f) == NULL) |
335 | return(NULL); |
336 | sk->inbuf.d.f = dbuf->next; |
337 | if(dbuf->next == NULL) |
338 | sk->inbuf.d.l = NULL; |
339 | buf = dbuf->data; |
340 | *size = dbuf->size; |
341 | free(dbuf->addr); |
342 | free(dbuf); |
343 | return(buf); |
344 | } |
345 | return(NULL); |
346 | } |
347 | |
348 | static void sockrecv(struct socket *sk) |
349 | { |
350 | int ret, inq; |
351 | struct dgrambuf *dbuf; |
352 | |
353 | switch(sk->type) |
354 | { |
355 | case SOCK_STREAM: |
356 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
357 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea |
358 | * how to read the inqueue size on other OSs */ |
359 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
360 | { |
361 | /* I don't really know what could go wrong here, so let's |
362 | * assume it's transient. */ |
363 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd); |
364 | inq = 2048; |
365 | } |
366 | #else |
367 | inq = 2048; |
368 | #endif |
369 | if(inq > 65536) |
370 | inq = 65536; |
371 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1); |
372 | ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq); |
373 | if(ret < 0) |
374 | { |
375 | if((errno == EINTR) || (errno == EAGAIN)) |
376 | return; |
cab0b442 |
377 | if(sk->errcb != NULL) |
378 | sk->errcb(sk, errno, sk->data); |
d3372da9 |
379 | closesock(sk); |
380 | return; |
381 | } |
382 | if(ret == 0) |
383 | { |
cab0b442 |
384 | if(sk->errcb != NULL) |
385 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
386 | closesock(sk); |
387 | return; |
388 | } |
389 | sk->inbuf.s.datasize += ret; |
cab0b442 |
390 | if(sk->readcb != NULL) |
391 | sk->readcb(sk, sk->data); |
d3372da9 |
392 | break; |
393 | case SOCK_DGRAM: |
394 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
395 | { |
396 | /* I don't really know what could go wrong here, so let's |
397 | * assume it's transient. */ |
398 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd); |
399 | return; |
400 | } |
401 | dbuf = smalloc(sizeof(*dbuf)); |
402 | dbuf->data = smalloc(inq); |
403 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); |
404 | ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen); |
405 | if(ret < 0) |
406 | { |
407 | free(dbuf->addr); |
408 | free(dbuf->data); |
409 | free(dbuf); |
410 | if((errno == EINTR) || (errno == EAGAIN)) |
411 | return; |
cab0b442 |
412 | if(sk->errcb != NULL) |
413 | sk->errcb(sk, errno, sk->data); |
d3372da9 |
414 | closesock(sk); |
415 | return; |
416 | } |
417 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
418 | * have EOF), but rather an empty packet. I don't know if any |
419 | * other potential DGRAM protocols might have an EOF |
420 | * condition, so let's play safe. */ |
421 | if(ret == 0) |
422 | { |
423 | free(dbuf->addr); |
424 | free(dbuf->data); |
425 | free(dbuf); |
426 | if(!((sk->family == AF_INET) || (sk->family == AF_INET6))) |
427 | { |
cab0b442 |
428 | if(sk->errcb != NULL) |
429 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
430 | closesock(sk); |
431 | } |
432 | return; |
433 | } |
434 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); |
435 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); |
436 | dbuf->next = NULL; |
437 | if(sk->inbuf.d.l != NULL) |
438 | sk->inbuf.d.l->next = dbuf; |
439 | else |
440 | sk->inbuf.d.f = dbuf; |
441 | sk->inbuf.d.l = dbuf; |
cab0b442 |
442 | if(sk->readcb != NULL) |
443 | sk->readcb(sk, sk->data); |
d3372da9 |
444 | break; |
445 | } |
446 | } |
447 | |
448 | static void sockflush(struct socket *sk) |
449 | { |
450 | int ret; |
451 | struct dgrambuf *dbuf; |
452 | |
453 | switch(sk->type) |
454 | { |
455 | case SOCK_STREAM: |
456 | if(sk->isrealsocket) |
457 | ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); |
458 | else |
459 | ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize); |
460 | if(ret < 0) |
461 | { |
462 | /* For now, assume transient error, since |
463 | * the socket is polled for errors */ |
464 | break; |
465 | } |
466 | if(ret > 0) |
467 | { |
468 | memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret); |
cab0b442 |
469 | if(sk->writecb != NULL) |
470 | sk->writecb(sk, sk->data); |
d3372da9 |
471 | } |
472 | break; |
473 | case SOCK_DGRAM: |
474 | dbuf = sk->outbuf.d.f; |
475 | if((sk->outbuf.d.f = dbuf->next) == NULL) |
476 | sk->outbuf.d.l = NULL; |
477 | sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); |
478 | free(dbuf->data); |
479 | free(dbuf->addr); |
480 | free(dbuf); |
cab0b442 |
481 | if(sk->writecb != NULL) |
482 | sk->writecb(sk, sk->data); |
d3372da9 |
483 | break; |
484 | } |
485 | } |
486 | |
487 | void closesock(struct socket *sk) |
488 | { |
b870805e |
489 | struct sockaddr_un *un; |
490 | |
491 | if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)&un, NULL) && (un->sun_family == PF_UNIX)) |
492 | { |
493 | if(strchr(un->sun_path, '/')) |
494 | { |
495 | if(unlink(un->sun_path)) |
496 | flog(LOG_WARNING, "could not unlink UNIX socket %s: %s", un->sun_path, strerror(errno)); |
497 | } |
498 | } |
d3372da9 |
499 | sk->state = SOCK_STL; |
500 | close(sk->fd); |
501 | sk->fd = -1; |
502 | sk->close = 0; |
503 | } |
504 | |
505 | void sockqueue(struct socket *sk, void *data, size_t size) |
506 | { |
507 | struct dgrambuf *new; |
508 | |
509 | if(sk->state == SOCK_STL) |
510 | return; |
511 | switch(sk->type) |
512 | { |
513 | case SOCK_STREAM: |
514 | sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1); |
515 | memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size); |
516 | sk->outbuf.s.datasize += size; |
517 | break; |
518 | case SOCK_DGRAM: |
519 | if(sk->remote == NULL) |
520 | return; |
521 | new = smalloc(sizeof(*new)); |
522 | new->next = NULL; |
523 | memcpy(new->data = smalloc(size), data, new->size = size); |
524 | memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen); |
525 | if(sk->outbuf.d.l == NULL) |
526 | { |
527 | sk->outbuf.d.l = sk->outbuf.d.f = new; |
528 | } else { |
529 | sk->outbuf.d.l->next = new; |
530 | sk->outbuf.d.l = new; |
531 | } |
532 | break; |
533 | } |
534 | } |
535 | |
536 | size_t sockgetdatalen(struct socket *sk) |
537 | { |
538 | struct dgrambuf *b; |
539 | size_t ret; |
540 | |
541 | switch(sk->type) |
542 | { |
543 | case SOCK_STREAM: |
544 | ret = sk->inbuf.s.datasize; |
545 | break; |
546 | case SOCK_DGRAM: |
547 | ret = 0; |
548 | for(b = sk->inbuf.d.f; b != NULL; b = b->next) |
549 | ret += b->size; |
550 | break; |
551 | } |
552 | return(ret); |
553 | } |
554 | |
555 | size_t sockqueuesize(struct socket *sk) |
556 | { |
557 | struct dgrambuf *b; |
558 | size_t ret; |
559 | |
560 | switch(sk->type) |
561 | { |
562 | case SOCK_STREAM: |
563 | ret = sk->outbuf.s.datasize; |
564 | break; |
565 | case SOCK_DGRAM: |
566 | ret = 0; |
567 | for(b = sk->outbuf.d.f; b != NULL; b = b->next) |
568 | ret += b->size; |
569 | break; |
570 | } |
571 | return(ret); |
572 | } |
573 | |
d3372da9 |
574 | /* |
575 | * The difference between netcslisten() and netcslistenlocal() is that |
576 | * netcslistenlocal() always listens on the local host, instead of |
577 | * following proxy/passive mode directions. It is suitable for eg. the |
578 | * UI channel, while the file sharing networks should, naturally, use |
579 | * netcslisten() instead. |
580 | */ |
581 | |
cab0b442 |
582 | struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
d3372da9 |
583 | { |
584 | struct socket *sk; |
66c517d2 |
585 | int intbuf; |
d3372da9 |
586 | |
587 | /* I don't know if this is actually correct (it probably isn't), |
588 | * but since, at on least Linux systems, PF_* are specifically |
589 | * #define'd to their AF_* counterparts, it allows for a severely |
590 | * smoother implementation. If it breaks something on your |
591 | * platform, please tell me so. |
592 | */ |
593 | if((sk = mksock(name->sa_family, type)) == NULL) |
594 | return(NULL); |
595 | sk->state = SOCK_LST; |
687b2ee2 |
596 | if(confgetint("net", "reuseaddr")) |
597 | { |
598 | intbuf = 1; |
599 | setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
600 | } |
d3372da9 |
601 | if(bind(sk->fd, name, namelen) < 0) |
602 | { |
603 | putsock(sk); |
604 | return(NULL); |
605 | } |
606 | if(listen(sk->fd, 16) < 0) |
607 | { |
608 | putsock(sk); |
609 | return(NULL); |
610 | } |
cab0b442 |
611 | sk->acceptcb = func; |
612 | sk->data = data; |
d3372da9 |
613 | return(sk); |
614 | } |
615 | |
cab0b442 |
616 | struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
c23acc61 |
617 | { |
618 | if(confgetint("net", "mode") == 1) |
619 | { |
620 | errno = EOPNOTSUPP; |
621 | return(NULL); |
622 | } |
c23acc61 |
623 | if(confgetint("net", "mode") == 0) |
624 | return(netcslistenlocal(type, name, namelen, func, data)); |
625 | errno = EOPNOTSUPP; |
626 | return(NULL); |
627 | } |
628 | |
cab0b442 |
629 | struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data) |
0a1bc5b1 |
630 | { |
631 | struct sockaddr_in addr; |
632 | #ifdef HAVE_IPV6 |
633 | struct sockaddr_in6 addr6; |
634 | #endif |
cab0b442 |
635 | struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *); |
0a1bc5b1 |
636 | struct socket *ret; |
637 | |
638 | if(local) |
639 | csfunc = netcslistenlocal; |
640 | else |
641 | csfunc = netcslisten; |
642 | #ifdef HAVE_IPV6 |
643 | memset(&addr6, 0, sizeof(addr6)); |
644 | addr6.sin6_family = AF_INET6; |
645 | addr6.sin6_port = htons(port); |
646 | addr6.sin6_addr = in6addr_any; |
647 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) |
648 | return(ret); |
649 | if((ret == NULL) && (errno != EAFNOSUPPORT)) |
650 | return(NULL); |
651 | #endif |
652 | memset(&addr, 0, sizeof(addr)); |
653 | addr.sin_family = AF_INET; |
654 | addr.sin_port = htons(port); |
655 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); |
656 | } |
657 | |
d3372da9 |
658 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
659 | { |
660 | struct socket *sk; |
661 | int mode; |
662 | |
663 | mode = confgetint("net", "mode"); |
664 | if((mode == 0) || (mode == 1)) |
665 | { |
666 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) |
667 | return(NULL); |
668 | if(bind(sk->fd, name, namelen) < 0) |
669 | { |
670 | putsock(sk); |
671 | return(NULL); |
672 | } |
673 | sk->state = SOCK_EST; |
674 | return(sk); |
675 | } |
676 | errno = EOPNOTSUPP; |
677 | return(NULL); |
678 | } |
679 | |
680 | struct socket *netdupsock(struct socket *sk) |
681 | { |
682 | struct socket *newsk; |
683 | |
684 | newsk = newsock(sk->type); |
685 | if((newsk->fd = dup(sk->fd)) < 0) |
686 | { |
687 | flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno)); |
688 | putsock(newsk); |
689 | return(NULL); |
690 | } |
691 | newsk->state = sk->state; |
692 | newsk->ignread = sk->ignread; |
693 | if(sk->remote != NULL) |
694 | memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen); |
695 | return(newsk); |
696 | } |
697 | |
698 | void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
699 | { |
700 | if(sk->remote != NULL) |
701 | free(sk->remote); |
702 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); |
703 | sk->ignread = 1; |
704 | } |
705 | |
cab0b442 |
706 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 |
707 | { |
708 | struct socket *sk; |
709 | int mode; |
710 | |
711 | mode = confgetint("net", "mode"); |
712 | if((mode == 0) || (mode == 1)) |
713 | { |
714 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) |
715 | return(NULL); |
716 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); |
717 | if(!connect(sk->fd, addr, addrlen)) |
718 | { |
719 | sk->state = SOCK_EST; |
720 | func(sk, 0, data); |
721 | return(sk); |
722 | } |
723 | if(errno == EINPROGRESS) |
724 | { |
725 | sk->state = SOCK_SYN; |
cab0b442 |
726 | sk->conncb = func; |
727 | sk->data = data; |
d3372da9 |
728 | return(sk); |
729 | } |
730 | putsock(sk); |
731 | return(NULL); |
732 | } |
733 | errno = EOPNOTSUPP; |
734 | return(NULL); |
735 | } |
736 | |
737 | int pollsocks(int timeout) |
738 | { |
eaa35963 |
739 | int i, num, ret; |
740 | socklen_t retlen; |
d3372da9 |
741 | int newfd; |
742 | struct pollfd *pfds; |
743 | struct socket *sk, *next, *newsk; |
744 | struct sockaddr_storage ss; |
745 | socklen_t sslen; |
746 | |
747 | pfds = smalloc(sizeof(*pfds) * (num = numsocks)); |
748 | for(i = 0, sk = sockets; i < num; sk = sk->next) |
749 | { |
750 | if(sk->state == SOCK_STL) |
751 | { |
752 | num--; |
753 | continue; |
754 | } |
755 | pfds[i].fd = sk->fd; |
756 | pfds[i].events = 0; |
757 | if(!sk->ignread) |
758 | pfds[i].events |= POLLIN; |
759 | if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0)) |
760 | pfds[i].events |= POLLOUT; |
761 | pfds[i].revents = 0; |
762 | i++; |
763 | } |
764 | ret = poll(pfds, num, timeout); |
765 | if(ret < 0) |
766 | { |
767 | if(errno != EINTR) |
768 | { |
769 | flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno)); |
770 | /* To avoid CPU hogging in case it's bad, which it |
771 | * probably is. */ |
772 | sleep(1); |
773 | } |
774 | free(pfds); |
775 | return(1); |
776 | } |
777 | for(sk = sockets; sk != NULL; sk = next) |
778 | { |
779 | next = sk->next; |
780 | for(i = 0; i < num; i++) |
781 | { |
782 | if(pfds[i].fd == sk->fd) |
783 | break; |
784 | } |
785 | if(i == num) |
786 | continue; |
787 | switch(sk->state) |
788 | { |
789 | case SOCK_LST: |
790 | if(pfds[i].revents & POLLIN) |
791 | { |
792 | sslen = sizeof(ss); |
793 | if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0) |
cab0b442 |
794 | { |
795 | if(sk->errcb != NULL) |
796 | sk->errcb(sk, errno, sk->data); |
797 | } |
d3372da9 |
798 | newsk = newsock(sk->type); |
799 | newsk->fd = newfd; |
800 | newsk->family = sk->family; |
801 | newsk->state = SOCK_EST; |
802 | memcpy(newsk->remote = smalloc(sslen), &ss, sslen); |
803 | newsk->remotelen = sslen; |
804 | putsock(newsk); |
cab0b442 |
805 | if(sk->acceptcb != NULL) |
806 | sk->acceptcb(sk, newsk, sk->data); |
d3372da9 |
807 | } |
808 | if(pfds[i].revents & POLLERR) |
809 | { |
810 | retlen = sizeof(ret); |
811 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
812 | if(sk->errcb != NULL) |
813 | sk->errcb(sk, ret, sk->data); |
d3372da9 |
814 | continue; |
815 | } |
816 | break; |
817 | case SOCK_SYN: |
818 | if(pfds[i].revents & POLLERR) |
819 | { |
820 | retlen = sizeof(ret); |
821 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
822 | if(sk->conncb != NULL) |
823 | sk->conncb(sk, ret, sk->data); |
d3372da9 |
824 | closesock(sk); |
825 | continue; |
826 | } |
827 | if(pfds[i].revents & (POLLIN | POLLOUT)) |
828 | { |
829 | sk->state = SOCK_EST; |
cab0b442 |
830 | if(sk->conncb != NULL) |
831 | sk->conncb(sk, 0, sk->data); |
d3372da9 |
832 | } |
833 | break; |
834 | case SOCK_EST: |
835 | if(pfds[i].revents & POLLERR) |
836 | { |
837 | retlen = sizeof(ret); |
838 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
839 | if(sk->errcb != NULL) |
840 | sk->errcb(sk, ret, sk->data); |
d3372da9 |
841 | closesock(sk); |
842 | continue; |
843 | } |
844 | if(pfds[i].revents & POLLIN) |
845 | sockrecv(sk); |
846 | if(pfds[i].revents & POLLOUT) |
847 | { |
848 | if(sockqueuesize(sk) > 0) |
849 | sockflush(sk); |
850 | } |
851 | break; |
852 | } |
853 | if(pfds[i].revents & POLLNVAL) |
854 | { |
855 | flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd); |
856 | sk->state = SOCK_STL; |
857 | unlinksock(sk); |
858 | continue; |
859 | } |
860 | if(pfds[i].revents & POLLHUP) |
861 | { |
cab0b442 |
862 | if(sk->errcb != NULL) |
863 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
864 | closesock(sk); |
865 | unlinksock(sk); |
866 | continue; |
867 | } |
868 | } |
869 | free(pfds); |
870 | for(sk = sockets; sk != NULL; sk = next) |
871 | { |
872 | next = sk->next; |
873 | if(sk->refcount == 1 && (sockqueuesize(sk) == 0)) |
874 | { |
875 | unlinksock(sk); |
876 | continue; |
877 | } |
878 | if(sk->close && (sockqueuesize(sk) == 0)) |
879 | closesock(sk); |
880 | if(sk->state == SOCK_STL) |
881 | { |
882 | unlinksock(sk); |
883 | continue; |
884 | } |
885 | } |
886 | return(1); |
887 | } |
888 | |
889 | int socksettos(struct socket *sk, int tos) |
890 | { |
b020fb3d |
891 | int buf; |
892 | |
d3372da9 |
893 | if(sk->family == AF_INET) |
894 | { |
b020fb3d |
895 | switch(tos) |
896 | { |
b198bed6 |
897 | case 0: |
898 | buf = 0; |
899 | break; |
b020fb3d |
900 | case SOCK_TOS_MINCOST: |
18c1ae1d |
901 | buf = 0x02; |
b020fb3d |
902 | break; |
903 | case SOCK_TOS_MAXREL: |
18c1ae1d |
904 | buf = 0x04; |
b020fb3d |
905 | break; |
906 | case SOCK_TOS_MAXTP: |
18c1ae1d |
907 | buf = 0x08; |
b020fb3d |
908 | break; |
909 | case SOCK_TOS_MINDELAY: |
18c1ae1d |
910 | buf = 0x10; |
b020fb3d |
911 | break; |
912 | default: |
913 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
914 | return(-1); |
915 | } |
916 | if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 |
917 | { |
918 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); |
919 | return(-1); |
920 | } |
921 | return(0); |
922 | } |
b020fb3d |
923 | if(sk->family == AF_INET6) |
924 | { |
925 | switch(tos) |
926 | { |
b198bed6 |
927 | case 0: |
928 | buf = 0; |
b020fb3d |
929 | case SOCK_TOS_MINCOST: |
930 | buf = confgetint("net", "diffserv-mincost"); |
931 | break; |
932 | case SOCK_TOS_MAXREL: |
933 | buf = confgetint("net", "diffserv-maxrel"); |
934 | break; |
935 | case SOCK_TOS_MAXTP: |
936 | buf = confgetint("net", "diffserv-maxtp"); |
937 | break; |
938 | case SOCK_TOS_MINDELAY: |
939 | buf = confgetint("net", "diffserv-mindelay"); |
940 | break; |
941 | default: |
942 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
943 | return(-1); |
944 | } |
945 | /* |
946 | On Linux, the API IPv6 flow label management doesn't seem to |
947 | be entirely complete, so I guess this will have to wait. |
948 | |
949 | if(setsockopt(...) < 0) |
950 | { |
951 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); |
952 | return(-1); |
953 | } |
954 | */ |
955 | return(0); |
956 | } |
d3372da9 |
957 | flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family); |
958 | return(1); |
959 | } |
960 | |
961 | struct resolvedata |
962 | { |
963 | int fd; |
964 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); |
965 | void *data; |
966 | struct sockaddr_storage addr; |
967 | int addrlen; |
968 | }; |
969 | |
970 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) |
971 | { |
972 | static char buf[80]; |
973 | int ret; |
974 | struct sockaddr_in *ipv4; |
975 | |
976 | if(!status) |
977 | { |
978 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) |
979 | { |
980 | errno = ENONET; |
981 | data->callback(NULL, 0, data->data); |
982 | } else { |
983 | ipv4 = (struct sockaddr_in *)&data->addr; |
984 | memcpy(&ipv4->sin_addr, buf, 4); |
985 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); |
986 | } |
987 | } else { |
988 | errno = ENONET; |
989 | data->callback(NULL, 0, data->data); |
990 | } |
991 | close(data->fd); |
992 | free(data); |
993 | } |
994 | |
995 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) |
996 | { |
997 | int i; |
998 | char *p; |
999 | int port; |
1000 | int pfd[2]; |
1001 | pid_t child; |
1002 | struct resolvedata *rdata; |
1003 | struct sockaddr_in ipv4; |
1004 | struct hostent *he; |
1005 | sigset_t sigset; |
1006 | |
1007 | /* IPv4 */ |
1008 | port = -1; |
1009 | if((p = strchr(addr, ':')) != NULL) |
1010 | { |
1011 | *p = 0; |
1012 | port = atoi(p + 1); |
1013 | } |
1014 | ipv4.sin_family = AF_INET; |
1015 | ipv4.sin_port = htons(port); |
1016 | if(inet_aton(addr, &ipv4.sin_addr)) |
1017 | { |
1018 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); |
1019 | } else { |
1020 | sigemptyset(&sigset); |
1021 | sigaddset(&sigset, SIGCHLD); |
1022 | sigprocmask(SIG_BLOCK, &sigset, NULL); |
1023 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) |
1024 | { |
1025 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1026 | return(-1); |
1027 | } |
1028 | if(child == 0) |
1029 | { |
1030 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1031 | for(i = 3; i < FD_SETSIZE; i++) |
1032 | { |
1033 | if(i != pfd[1]) |
1034 | close(i); |
1035 | } |
1036 | signal(SIGALRM, SIG_DFL); |
1037 | alarm(30); |
1038 | if((he = gethostbyname(addr)) == NULL) |
1039 | exit(1); |
1040 | write(pfd[1], he->h_addr_list[0], 4); |
1041 | exit(0); |
1042 | } else { |
1043 | close(pfd[1]); |
1044 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); |
1045 | rdata = smalloc(sizeof(*rdata)); |
1046 | rdata->fd = pfd[0]; |
1047 | rdata->callback = callback; |
1048 | rdata->data = data; |
1049 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); |
1050 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); |
1051 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1052 | return(1); |
1053 | } |
1054 | } |
1055 | return(0); |
1056 | } |
1057 | |
1058 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1059 | { |
1060 | socklen_t len; |
1061 | struct sockaddr_storage name; |
1062 | |
1063 | *namebuf = NULL; |
1064 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
1065 | return(-1); |
1066 | len = sizeof(name); |
1067 | if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0) |
1068 | { |
6fb0c6ac |
1069 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 |
1070 | return(-1); |
1071 | } |
1072 | *namebuf = memcpy(smalloc(len), &name, len); |
b870805e |
1073 | if(lenbuf != NULL) |
1074 | *lenbuf = len; |
d3372da9 |
1075 | return(0); |
1076 | } |
1077 | |
eaa35963 |
1078 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1079 | { |
1080 | if(dst->sa_family != src->sa_family) |
1081 | { |
1082 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); |
1083 | return; |
1084 | } |
1085 | switch(src->sa_family) |
1086 | { |
1087 | case AF_INET: |
1088 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; |
1089 | break; |
1090 | case AF_INET6: |
1091 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; |
1092 | break; |
1093 | default: |
1094 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); |
1095 | break; |
1096 | } |
1097 | } |
1098 | |
1099 | static int makepublic(struct sockaddr *addr) |
d3372da9 |
1100 | { |
6fb0c6ac |
1101 | int ret; |
eaa35963 |
1102 | socklen_t plen; |
1103 | struct sockaddr *pname; |
1104 | |
1105 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) |
1106 | { |
1107 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); |
1108 | return(-1); |
1109 | } |
1110 | if(ret) |
1111 | return(0); |
1112 | sethostaddr(addr, pname); |
1113 | free(pname); |
1114 | return(0); |
1115 | } |
1116 | |
1117 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1118 | { |
d3372da9 |
1119 | socklen_t len; |
6fb0c6ac |
1120 | struct sockaddr *name; |
d3372da9 |
1121 | |
1122 | switch(confgetint("net", "mode")) |
1123 | { |
1124 | case 0: |
1125 | *namebuf = NULL; |
1126 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
d3372da9 |
1127 | { |
eaa35963 |
1128 | errno = EBADF; |
d3372da9 |
1129 | return(-1); |
1130 | } |
6fb0c6ac |
1131 | if(!sockgetlocalname(sk, &name, &len)) |
1132 | { |
1133 | *namebuf = name; |
1134 | *lenbuf = len; |
eaa35963 |
1135 | makepublic(name); |
6fb0c6ac |
1136 | return(0); |
1137 | } |
1138 | flog(LOG_ERR, "could not get remotely accessible name by any means"); |
1139 | return(-1); |
d3372da9 |
1140 | case 1: |
1141 | errno = EOPNOTSUPP; |
1142 | return(-1); |
1143 | default: |
1144 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); |
1145 | errno = EOPNOTSUPP; |
1146 | return(-1); |
1147 | } |
1148 | } |
1149 | |
d29853b1 |
1150 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1151 | { |
1152 | struct sockaddr *name1, *name2; |
1153 | socklen_t len1, len2; |
1154 | |
1155 | if(sk->family != sk2->family) |
1156 | { |
1157 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family); |
1158 | return(-1); |
1159 | } |
3804379d |
1160 | if(sockgetremotename(sk, &name1, &len1)) |
d29853b1 |
1161 | return(-1); |
3804379d |
1162 | if(sockgetremotename(sk2, &name2, &len2)) { |
d29853b1 |
1163 | free(name1); |
1164 | return(-1); |
1165 | } |
1166 | sethostaddr(name1, name2); |
1167 | free(name2); |
1168 | *namebuf = name1; |
1169 | *lenbuf = len1; |
1170 | return(0); |
1171 | } |
1172 | |
99a28d47 |
1173 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1174 | { |
1175 | struct sockaddr_un *u1, *u2; |
1176 | struct sockaddr_in *n1, *n2; |
1177 | #ifdef HAVE_IPV6 |
1178 | struct sockaddr_in6 *s1, *s2; |
1179 | #endif |
1180 | |
1181 | if(x->sa_family != y->sa_family) |
1182 | return(0); |
1183 | switch(x->sa_family) { |
1184 | case AF_UNIX: |
1185 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; |
1186 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) |
1187 | return(0); |
1188 | break; |
1189 | case AF_INET: |
1190 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; |
1191 | if(n1->sin_port != n2->sin_port) |
1192 | return(0); |
1193 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) |
1194 | return(0); |
1195 | break; |
c8a729d7 |
1196 | #ifdef HAVE_IPV6 |
99a28d47 |
1197 | case AF_INET6: |
1198 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; |
1199 | if(s1->sin6_port != s2->sin6_port) |
1200 | return(0); |
1201 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) |
1202 | return(0); |
1203 | break; |
c8a729d7 |
1204 | #endif |
99a28d47 |
1205 | } |
1206 | return(1); |
1207 | } |
1208 | |
d3372da9 |
1209 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1210 | { |
1211 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with |
1212 | * lowercase letters to 1, so I do this |
1213 | * instead. */ |
1214 | struct sockaddr_in *ipv4; |
1215 | #ifdef HAVE_IPV6 |
1216 | struct sockaddr_in6 *ipv6; |
1217 | #endif |
1218 | static char *ret = NULL; |
1219 | char buf[1024]; |
1220 | |
1221 | if(ret != NULL) |
1222 | free(ret); |
1223 | ret = NULL; |
1224 | switch(arg->sa_family) |
1225 | { |
1226 | case AF_UNIX: |
1227 | UNIX = (struct sockaddr_un *)arg; |
1228 | ret = sprintf2("%s", UNIX->sun_path); |
1229 | break; |
1230 | case AF_INET: |
1231 | ipv4 = (struct sockaddr_in *)arg; |
1232 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) |
1233 | return(NULL); |
1234 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); |
1235 | break; |
1236 | #ifdef HAVE_IPV6 |
1237 | case AF_INET6: |
1238 | ipv6 = (struct sockaddr_in6 *)arg; |
1239 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) |
1240 | return(NULL); |
fc7f7735 |
1241 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 |
1242 | break; |
1243 | #endif |
1244 | default: |
1245 | errno = EPFNOSUPPORT; |
1246 | break; |
1247 | } |
1248 | return(ret); |
1249 | } |
1250 | |
1251 | #if 0 |
1252 | |
1253 | /* |
1254 | * It was very nice to use this, but it seems |
1255 | * to mess things up, so I guess it has to go... :-( |
1256 | */ |
1257 | |
1258 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) |
1259 | { |
1260 | struct sockaddr *arg; |
1261 | socklen_t arglen; |
1262 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with |
1263 | * lowercase letters to 1, so I do this |
1264 | * instead. */ |
1265 | struct sockaddr_in *ipv4; |
1266 | int ret; |
1267 | |
1268 | arg = *(struct sockaddr **)(args[0]); |
1269 | arglen = *(socklen_t *)(args[1]); |
1270 | switch(arg->sa_family) |
1271 | { |
1272 | case AF_UNIX: |
1273 | UNIX = (struct sockaddr_un *)arg; |
1274 | ret = fprintf(stream, "%s", UNIX->sun_path); |
1275 | break; |
1276 | case AF_INET: |
1277 | ipv4 = (struct sockaddr_in *)arg; |
1278 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); |
1279 | break; |
1280 | default: |
1281 | ret = -1; |
1282 | errno = EPFNOSUPPORT; |
1283 | break; |
1284 | } |
1285 | return(ret); |
1286 | } |
1287 | |
1288 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) |
1289 | { |
1290 | if(n > 0) |
1291 | argtypes[0] = PA_POINTER; |
1292 | if(n > 1) |
1293 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ |
1294 | * be an int, so I guess this should be |
1295 | * safe. */ |
1296 | return(2); |
1297 | } |
1298 | #endif |
1299 | |
1300 | static int init(int hup) |
1301 | { |
1302 | if(!hup) |
1303 | { |
1304 | /* |
1305 | if(register_printf_function('N', formataddress, formataddress_arginfo)) |
1306 | { |
1307 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); |
1308 | return(1); |
1309 | } |
1310 | */ |
1311 | } |
1312 | return(0); |
1313 | } |
1314 | |
1315 | static void terminate(void) |
1316 | { |
1317 | while(sockets != NULL) |
1318 | unlinksock(sockets); |
1319 | } |
1320 | |
1321 | static struct module me = |
1322 | { |
1323 | .name = "net", |
1324 | .conf = |
1325 | { |
1326 | .vars = myvars |
1327 | }, |
1328 | .init = init, |
1329 | .terminate = terminate |
1330 | }; |
1331 | |
1332 | MODULE(me) |