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> |
7ab36fbd |
36 | #include <sys/stat.h> /* For rebindunix() */ |
d3372da9 |
37 | #ifdef HAVE_LINUX_SOCKIOS_H |
38 | #include <linux/sockios.h> |
39 | #endif |
40 | #include <errno.h> |
41 | #include <net/if.h> |
42 | |
43 | #include "conf.h" |
44 | #include "net.h" |
45 | #include "module.h" |
46 | #include "log.h" |
47 | #include "utils.h" |
48 | #include "sysevents.h" |
49 | |
50 | static struct configvar myvars[] = |
51 | { |
d9f89ef5 |
52 | /** The network mode to use. Currently supported values are 0 for |
53 | * active mode and 1 for passive mode. In the future, SOCKS5 proxy |
54 | * support may be added. */ |
d3372da9 |
55 | {CONF_VAR_INT, "mode", {.num = 0}}, |
d9f89ef5 |
56 | /** Set the SO_REUSEADDR socket option on listening sockets, so |
57 | * that dead TCP connections waiting for timeout are ignored. */ |
347d6d76 |
58 | {CONF_VAR_BOOL, "reuseaddr", {.num = 0}}, |
d9f89ef5 |
59 | /** Overrides the IPv4 address reported to other clients in active |
60 | * mode. Useful for servers behind NAT routers. If both this and |
61 | * net.publicif are unspecified the address of the hub connection |
62 | * is used. */ |
d3372da9 |
63 | {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}}, |
d9f89ef5 |
64 | /** Specifies an interface name from which to fetch the IPv4 |
65 | * address reported to other clients in active mode. If both this |
66 | * and net.visibleipv4 are unspecified the address of the hub |
67 | * connection is used. */ |
d3372da9 |
68 | {CONF_VAR_STRING, "publicif", {.str = L""}}, |
b020fb3d |
69 | /* Diffserv should be supported on IPv4, too, but I don't know the |
70 | * API to do that. */ |
d9f89ef5 |
71 | /** The Diffserv value to use on IPv6 connections when the |
72 | * minimize cost TOS value is used (see the TOS VALUES |
73 | * section). */ |
b020fb3d |
74 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
d9f89ef5 |
75 | /** The Diffserv value to use on IPv6 connections when the |
76 | * maximize reliability TOS value is used (see the TOS VALUES |
77 | * section). */ |
b020fb3d |
78 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
d9f89ef5 |
79 | /** The Diffserv value to use on IPv6 connections when the |
80 | * maximize throughput TOS value is used (see the TOS VALUES |
81 | * section). */ |
b020fb3d |
82 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
d9f89ef5 |
83 | /** The Diffserv value to use on IPv6 connections when the |
84 | * minimize delay TOS value is used (see the TOS VALUES |
85 | * section). */ |
b020fb3d |
86 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
d3372da9 |
87 | {CONF_VAR_END} |
88 | }; |
89 | |
90 | static struct socket *sockets = NULL; |
91 | int numsocks = 0; |
92 | |
93 | /* XXX: Get autoconf for all this... */ |
94 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) |
95 | { |
96 | struct sockaddr_in *ipv4; |
97 | struct configvar *var; |
98 | void *bufend; |
99 | int sock; |
100 | struct ifconf conf; |
101 | struct ifreq *ifr, req; |
102 | char *pif; |
103 | |
104 | if(af == AF_INET) |
105 | { |
106 | var = confgetvar("net", "visibleipv4"); |
107 | if(var->val.ipv4.s_addr != 0) |
108 | { |
109 | ipv4 = smalloc(sizeof(*ipv4)); |
110 | ipv4->sin_family = AF_INET; |
111 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; |
112 | *addr = (struct sockaddr *)ipv4; |
113 | *lenbuf = sizeof(*ipv4); |
114 | return(0); |
115 | } |
bcb73bb3 |
116 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 |
117 | { |
118 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); |
119 | return(-1); |
120 | } |
6fb0c6ac |
121 | if(!strcmp(pif, "")) |
122 | return(1); |
d3372da9 |
123 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
124 | return(-1); |
125 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); |
126 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) |
127 | { |
128 | free(conf.ifc_buf); |
129 | close(sock); |
130 | return(-1); |
131 | } |
132 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; |
133 | ipv4 = NULL; |
134 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) |
135 | { |
1315d02a |
136 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac |
137 | continue; |
d3372da9 |
138 | memset(&req, 0, sizeof(req)); |
139 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); |
140 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) |
6fb0c6ac |
141 | break; |
142 | if(!(req.ifr_flags & IFF_UP)) |
d3372da9 |
143 | { |
6fb0c6ac |
144 | flog(LOG_WARNING, "public interface is down"); |
145 | break; |
d3372da9 |
146 | } |
6fb0c6ac |
147 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 |
148 | { |
6fb0c6ac |
149 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
150 | break; |
d3372da9 |
151 | } |
6fb0c6ac |
152 | ipv4 = smalloc(sizeof(*ipv4)); |
153 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); |
154 | break; |
d3372da9 |
155 | } |
bcb73bb3 |
156 | free(conf.ifc_buf); |
d3372da9 |
157 | close(sock); |
158 | if(ipv4 != NULL) |
159 | { |
160 | *addr = (struct sockaddr *)ipv4; |
161 | *lenbuf = sizeof(*ipv4); |
162 | return(0); |
163 | } |
164 | errno = ENETDOWN; |
165 | return(-1); |
166 | } |
6fb0c6ac |
167 | return(1); |
d3372da9 |
168 | } |
169 | |
170 | static struct socket *newsock(int type) |
171 | { |
172 | struct socket *new; |
173 | |
174 | new = smalloc(sizeof(*new)); |
175 | new->refcount = 2; |
176 | new->fd = -1; |
177 | new->isrealsocket = 1; |
178 | new->family = -1; |
179 | new->tos = 0; |
180 | new->type = type; |
181 | new->state = -1; |
182 | new->ignread = 0; |
183 | new->close = 0; |
184 | new->remote = NULL; |
185 | new->remotelen = 0; |
186 | switch(type) |
187 | { |
188 | case SOCK_STREAM: |
189 | new->outbuf.s.buf = NULL; |
190 | new->outbuf.s.bufsize = 0; |
191 | new->outbuf.s.datasize = 0; |
192 | new->inbuf.s.buf = NULL; |
193 | new->inbuf.s.bufsize = 0; |
194 | new->inbuf.s.datasize = 0; |
195 | break; |
196 | case SOCK_DGRAM: |
197 | new->outbuf.d.f = new->outbuf.d.l = NULL; |
198 | new->inbuf.d.f = new->inbuf.d.l = NULL; |
199 | break; |
200 | } |
cab0b442 |
201 | new->conncb = NULL; |
202 | new->errcb = NULL; |
203 | new->readcb = NULL; |
204 | new->writecb = NULL; |
205 | new->acceptcb = NULL; |
d3372da9 |
206 | new->next = sockets; |
207 | new->prev = NULL; |
208 | if(sockets != NULL) |
209 | sockets->prev = new; |
210 | sockets = new; |
211 | numsocks++; |
212 | return(new); |
213 | } |
214 | |
215 | static struct socket *mksock(int domain, int type) |
216 | { |
217 | int fd; |
218 | struct socket *new; |
219 | |
220 | if((fd = socket(domain, type, 0)) < 0) |
221 | { |
222 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); |
223 | return(NULL); |
224 | } |
225 | new = newsock(type); |
226 | new->fd = fd; |
227 | new->family = domain; |
228 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
229 | return(new); |
230 | } |
231 | |
232 | struct socket *wrapsock(int fd) |
233 | { |
234 | struct socket *new; |
235 | |
236 | new = newsock(SOCK_STREAM); |
237 | new->fd = fd; |
238 | new->state = SOCK_EST; |
239 | new->isrealsocket = 0; |
240 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
241 | return(new); |
242 | } |
243 | |
244 | static void unlinksock(struct socket *sk) |
245 | { |
246 | if(sk->prev != NULL) |
247 | sk->prev->next = sk->next; |
248 | if(sk->next != NULL) |
249 | sk->next->prev = sk->prev; |
250 | if(sk == sockets) |
251 | sockets = sk->next; |
252 | putsock(sk); |
253 | numsocks--; |
254 | } |
255 | |
256 | void getsock(struct socket *sk) |
257 | { |
258 | sk->refcount++; |
259 | } |
260 | |
261 | void putsock(struct socket *sk) |
262 | { |
263 | struct dgrambuf *buf; |
264 | |
265 | if(--(sk->refcount) == 0) |
266 | { |
267 | switch(sk->type) |
268 | { |
269 | case SOCK_STREAM: |
270 | if(sk->outbuf.s.buf != NULL) |
271 | free(sk->outbuf.s.buf); |
272 | if(sk->inbuf.s.buf != NULL) |
273 | free(sk->inbuf.s.buf); |
274 | break; |
275 | case SOCK_DGRAM: |
276 | while((buf = sk->outbuf.d.f) != NULL) |
277 | { |
278 | sk->outbuf.d.f = buf->next; |
279 | free(buf->data); |
161604ea |
280 | free(buf->addr); |
d3372da9 |
281 | free(buf); |
282 | } |
283 | while((buf = sk->inbuf.d.f) != NULL) |
284 | { |
285 | sk->inbuf.d.f = buf->next; |
286 | free(buf->data); |
161604ea |
287 | free(buf->addr); |
d3372da9 |
288 | free(buf); |
289 | } |
290 | break; |
291 | } |
b870805e |
292 | closesock(sk); |
d3372da9 |
293 | if(sk->remote != NULL) |
294 | free(sk->remote); |
295 | free(sk); |
296 | } |
297 | } |
298 | |
336539c2 |
299 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
300 | { |
301 | switch(sk->type) |
302 | { |
303 | case SOCK_STREAM: |
304 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1); |
305 | memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize); |
306 | memcpy(sk->inbuf.s.buf, buf, size); |
307 | sk->inbuf.s.datasize += size; |
308 | break; |
309 | case SOCK_DGRAM: |
310 | /* XXX */ |
311 | break; |
312 | } |
313 | return; |
314 | } |
315 | |
d3372da9 |
316 | void *sockgetinbuf(struct socket *sk, size_t *size) |
317 | { |
318 | void *buf; |
319 | struct dgrambuf *dbuf; |
320 | |
321 | switch(sk->type) |
322 | { |
323 | case SOCK_STREAM: |
324 | if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0)) |
325 | { |
326 | *size = 0; |
327 | return(NULL); |
328 | } |
329 | buf = sk->inbuf.s.buf; |
330 | *size = sk->inbuf.s.datasize; |
331 | sk->inbuf.s.buf = NULL; |
332 | sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0; |
333 | return(buf); |
334 | case SOCK_DGRAM: |
335 | if((dbuf = sk->inbuf.d.f) == NULL) |
336 | return(NULL); |
337 | sk->inbuf.d.f = dbuf->next; |
338 | if(dbuf->next == NULL) |
339 | sk->inbuf.d.l = NULL; |
340 | buf = dbuf->data; |
341 | *size = dbuf->size; |
342 | free(dbuf->addr); |
343 | free(dbuf); |
344 | return(buf); |
345 | } |
346 | return(NULL); |
347 | } |
348 | |
349 | static void sockrecv(struct socket *sk) |
350 | { |
351 | int ret, inq; |
352 | struct dgrambuf *dbuf; |
353 | |
354 | switch(sk->type) |
355 | { |
356 | case SOCK_STREAM: |
357 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
358 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea |
359 | * how to read the inqueue size on other OSs */ |
360 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
361 | { |
362 | /* I don't really know what could go wrong here, so let's |
363 | * assume it's transient. */ |
364 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd); |
365 | inq = 2048; |
366 | } |
367 | #else |
368 | inq = 2048; |
369 | #endif |
370 | if(inq > 65536) |
371 | inq = 65536; |
372 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1); |
373 | ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq); |
374 | if(ret < 0) |
375 | { |
376 | if((errno == EINTR) || (errno == EAGAIN)) |
377 | return; |
cab0b442 |
378 | if(sk->errcb != NULL) |
379 | sk->errcb(sk, errno, sk->data); |
d3372da9 |
380 | closesock(sk); |
381 | return; |
382 | } |
383 | if(ret == 0) |
384 | { |
cab0b442 |
385 | if(sk->errcb != NULL) |
386 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
387 | closesock(sk); |
388 | return; |
389 | } |
390 | sk->inbuf.s.datasize += ret; |
cab0b442 |
391 | if(sk->readcb != NULL) |
392 | sk->readcb(sk, sk->data); |
d3372da9 |
393 | break; |
394 | case SOCK_DGRAM: |
395 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
396 | { |
397 | /* I don't really know what could go wrong here, so let's |
398 | * assume it's transient. */ |
399 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd); |
400 | return; |
401 | } |
402 | dbuf = smalloc(sizeof(*dbuf)); |
403 | dbuf->data = smalloc(inq); |
404 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); |
405 | ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen); |
406 | if(ret < 0) |
407 | { |
408 | free(dbuf->addr); |
409 | free(dbuf->data); |
410 | free(dbuf); |
411 | if((errno == EINTR) || (errno == EAGAIN)) |
412 | return; |
cab0b442 |
413 | if(sk->errcb != NULL) |
414 | sk->errcb(sk, errno, sk->data); |
d3372da9 |
415 | closesock(sk); |
416 | return; |
417 | } |
418 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
419 | * have EOF), but rather an empty packet. I don't know if any |
420 | * other potential DGRAM protocols might have an EOF |
421 | * condition, so let's play safe. */ |
422 | if(ret == 0) |
423 | { |
424 | free(dbuf->addr); |
425 | free(dbuf->data); |
426 | free(dbuf); |
427 | if(!((sk->family == AF_INET) || (sk->family == AF_INET6))) |
428 | { |
cab0b442 |
429 | if(sk->errcb != NULL) |
430 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
431 | closesock(sk); |
432 | } |
433 | return; |
434 | } |
435 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); |
436 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); |
437 | dbuf->next = NULL; |
438 | if(sk->inbuf.d.l != NULL) |
439 | sk->inbuf.d.l->next = dbuf; |
440 | else |
441 | sk->inbuf.d.f = dbuf; |
442 | sk->inbuf.d.l = dbuf; |
cab0b442 |
443 | if(sk->readcb != NULL) |
444 | sk->readcb(sk, sk->data); |
d3372da9 |
445 | break; |
446 | } |
447 | } |
448 | |
449 | static void sockflush(struct socket *sk) |
450 | { |
451 | int ret; |
452 | struct dgrambuf *dbuf; |
453 | |
454 | switch(sk->type) |
455 | { |
456 | case SOCK_STREAM: |
457 | if(sk->isrealsocket) |
458 | ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); |
459 | else |
460 | ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize); |
461 | if(ret < 0) |
462 | { |
463 | /* For now, assume transient error, since |
464 | * the socket is polled for errors */ |
465 | break; |
466 | } |
467 | if(ret > 0) |
468 | { |
469 | memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret); |
cab0b442 |
470 | if(sk->writecb != NULL) |
471 | sk->writecb(sk, sk->data); |
d3372da9 |
472 | } |
473 | break; |
474 | case SOCK_DGRAM: |
475 | dbuf = sk->outbuf.d.f; |
476 | if((sk->outbuf.d.f = dbuf->next) == NULL) |
477 | sk->outbuf.d.l = NULL; |
478 | sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); |
479 | free(dbuf->data); |
480 | free(dbuf->addr); |
481 | free(dbuf); |
cab0b442 |
482 | if(sk->writecb != NULL) |
483 | sk->writecb(sk, sk->data); |
d3372da9 |
484 | break; |
485 | } |
486 | } |
487 | |
488 | void closesock(struct socket *sk) |
489 | { |
b870805e |
490 | struct sockaddr_un *un; |
491 | |
492 | if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)&un, NULL) && (un->sun_family == PF_UNIX)) |
493 | { |
7ab36fbd |
494 | if((sk->state == SOCK_LST) && strchr(un->sun_path, '/')) |
b870805e |
495 | { |
496 | if(unlink(un->sun_path)) |
7ab36fbd |
497 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); |
b870805e |
498 | } |
499 | } |
d3372da9 |
500 | sk->state = SOCK_STL; |
501 | close(sk->fd); |
502 | sk->fd = -1; |
503 | sk->close = 0; |
504 | } |
505 | |
506 | void sockqueue(struct socket *sk, void *data, size_t size) |
507 | { |
508 | struct dgrambuf *new; |
509 | |
510 | if(sk->state == SOCK_STL) |
511 | return; |
512 | switch(sk->type) |
513 | { |
514 | case SOCK_STREAM: |
515 | sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1); |
516 | memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size); |
517 | sk->outbuf.s.datasize += size; |
518 | break; |
519 | case SOCK_DGRAM: |
520 | if(sk->remote == NULL) |
521 | return; |
522 | new = smalloc(sizeof(*new)); |
523 | new->next = NULL; |
524 | memcpy(new->data = smalloc(size), data, new->size = size); |
525 | memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen); |
526 | if(sk->outbuf.d.l == NULL) |
527 | { |
528 | sk->outbuf.d.l = sk->outbuf.d.f = new; |
529 | } else { |
530 | sk->outbuf.d.l->next = new; |
531 | sk->outbuf.d.l = new; |
532 | } |
533 | break; |
534 | } |
535 | } |
536 | |
537 | size_t sockgetdatalen(struct socket *sk) |
538 | { |
539 | struct dgrambuf *b; |
540 | size_t ret; |
541 | |
542 | switch(sk->type) |
543 | { |
544 | case SOCK_STREAM: |
545 | ret = sk->inbuf.s.datasize; |
546 | break; |
547 | case SOCK_DGRAM: |
548 | ret = 0; |
549 | for(b = sk->inbuf.d.f; b != NULL; b = b->next) |
550 | ret += b->size; |
551 | break; |
552 | } |
553 | return(ret); |
554 | } |
555 | |
556 | size_t sockqueuesize(struct socket *sk) |
557 | { |
558 | struct dgrambuf *b; |
559 | size_t ret; |
560 | |
561 | switch(sk->type) |
562 | { |
563 | case SOCK_STREAM: |
564 | ret = sk->outbuf.s.datasize; |
565 | break; |
566 | case SOCK_DGRAM: |
567 | ret = 0; |
568 | for(b = sk->outbuf.d.f; b != NULL; b = b->next) |
569 | ret += b->size; |
570 | break; |
571 | } |
572 | return(ret); |
573 | } |
574 | |
d3372da9 |
575 | /* |
7ab36fbd |
576 | * Seriously, I don't know if it's naughty or not to remove |
577 | * pre-existing Unix sockets. |
578 | */ |
579 | static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen) |
580 | { |
581 | struct sockaddr_un *un; |
582 | struct stat sb; |
583 | |
584 | if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
585 | return(-1); |
586 | un = (struct sockaddr_un *)name; |
587 | if(stat(un->sun_path, &sb)) |
588 | return(-1); |
589 | if(!S_ISSOCK(sb.st_mode)) |
590 | return(-1); |
591 | if(unlink(un->sun_path)) |
592 | return(-1); |
593 | if(bind(sk->fd, name, namelen) < 0) |
594 | return(-1); |
595 | return(0); |
596 | } |
597 | |
598 | /* |
d3372da9 |
599 | * The difference between netcslisten() and netcslistenlocal() is that |
600 | * netcslistenlocal() always listens on the local host, instead of |
601 | * following proxy/passive mode directions. It is suitable for eg. the |
602 | * UI channel, while the file sharing networks should, naturally, use |
603 | * netcslisten() instead. |
604 | */ |
605 | |
cab0b442 |
606 | struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
d3372da9 |
607 | { |
608 | struct socket *sk; |
66c517d2 |
609 | int intbuf; |
d3372da9 |
610 | |
611 | /* I don't know if this is actually correct (it probably isn't), |
612 | * but since, at on least Linux systems, PF_* are specifically |
613 | * #define'd to their AF_* counterparts, it allows for a severely |
614 | * smoother implementation. If it breaks something on your |
615 | * platform, please tell me so. |
616 | */ |
617 | if((sk = mksock(name->sa_family, type)) == NULL) |
618 | return(NULL); |
619 | sk->state = SOCK_LST; |
687b2ee2 |
620 | if(confgetint("net", "reuseaddr")) |
621 | { |
622 | intbuf = 1; |
623 | setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
624 | } |
7ab36fbd |
625 | if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0))) |
d3372da9 |
626 | { |
627 | putsock(sk); |
628 | return(NULL); |
629 | } |
630 | if(listen(sk->fd, 16) < 0) |
631 | { |
632 | putsock(sk); |
633 | return(NULL); |
634 | } |
cab0b442 |
635 | sk->acceptcb = func; |
636 | sk->data = data; |
d3372da9 |
637 | return(sk); |
638 | } |
639 | |
cab0b442 |
640 | struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
c23acc61 |
641 | { |
642 | if(confgetint("net", "mode") == 1) |
643 | { |
644 | errno = EOPNOTSUPP; |
645 | return(NULL); |
646 | } |
c23acc61 |
647 | if(confgetint("net", "mode") == 0) |
648 | return(netcslistenlocal(type, name, namelen, func, data)); |
649 | errno = EOPNOTSUPP; |
650 | return(NULL); |
651 | } |
652 | |
cab0b442 |
653 | struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data) |
0a1bc5b1 |
654 | { |
655 | struct sockaddr_in addr; |
656 | #ifdef HAVE_IPV6 |
657 | struct sockaddr_in6 addr6; |
658 | #endif |
cab0b442 |
659 | struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *); |
0a1bc5b1 |
660 | struct socket *ret; |
661 | |
662 | if(local) |
663 | csfunc = netcslistenlocal; |
664 | else |
665 | csfunc = netcslisten; |
666 | #ifdef HAVE_IPV6 |
667 | memset(&addr6, 0, sizeof(addr6)); |
668 | addr6.sin6_family = AF_INET6; |
669 | addr6.sin6_port = htons(port); |
670 | addr6.sin6_addr = in6addr_any; |
671 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) |
672 | return(ret); |
673 | if((ret == NULL) && (errno != EAFNOSUPPORT)) |
674 | return(NULL); |
675 | #endif |
676 | memset(&addr, 0, sizeof(addr)); |
677 | addr.sin_family = AF_INET; |
678 | addr.sin_port = htons(port); |
679 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); |
680 | } |
681 | |
d3372da9 |
682 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
683 | { |
684 | struct socket *sk; |
685 | int mode; |
686 | |
687 | mode = confgetint("net", "mode"); |
688 | if((mode == 0) || (mode == 1)) |
689 | { |
690 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) |
691 | return(NULL); |
692 | if(bind(sk->fd, name, namelen) < 0) |
693 | { |
694 | putsock(sk); |
695 | return(NULL); |
696 | } |
697 | sk->state = SOCK_EST; |
698 | return(sk); |
699 | } |
700 | errno = EOPNOTSUPP; |
701 | return(NULL); |
702 | } |
703 | |
704 | struct socket *netdupsock(struct socket *sk) |
705 | { |
706 | struct socket *newsk; |
707 | |
708 | newsk = newsock(sk->type); |
709 | if((newsk->fd = dup(sk->fd)) < 0) |
710 | { |
711 | flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno)); |
712 | putsock(newsk); |
713 | return(NULL); |
714 | } |
715 | newsk->state = sk->state; |
716 | newsk->ignread = sk->ignread; |
717 | if(sk->remote != NULL) |
718 | memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen); |
719 | return(newsk); |
720 | } |
721 | |
722 | void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
723 | { |
724 | if(sk->remote != NULL) |
725 | free(sk->remote); |
726 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); |
727 | sk->ignread = 1; |
728 | } |
729 | |
cab0b442 |
730 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 |
731 | { |
732 | struct socket *sk; |
733 | int mode; |
734 | |
735 | mode = confgetint("net", "mode"); |
736 | if((mode == 0) || (mode == 1)) |
737 | { |
738 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) |
739 | return(NULL); |
740 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); |
741 | if(!connect(sk->fd, addr, addrlen)) |
742 | { |
743 | sk->state = SOCK_EST; |
744 | func(sk, 0, data); |
745 | return(sk); |
746 | } |
747 | if(errno == EINPROGRESS) |
748 | { |
749 | sk->state = SOCK_SYN; |
cab0b442 |
750 | sk->conncb = func; |
751 | sk->data = data; |
d3372da9 |
752 | return(sk); |
753 | } |
754 | putsock(sk); |
755 | return(NULL); |
756 | } |
757 | errno = EOPNOTSUPP; |
758 | return(NULL); |
759 | } |
760 | |
761 | int pollsocks(int timeout) |
762 | { |
eaa35963 |
763 | int i, num, ret; |
764 | socklen_t retlen; |
d3372da9 |
765 | int newfd; |
766 | struct pollfd *pfds; |
767 | struct socket *sk, *next, *newsk; |
768 | struct sockaddr_storage ss; |
769 | socklen_t sslen; |
770 | |
771 | pfds = smalloc(sizeof(*pfds) * (num = numsocks)); |
772 | for(i = 0, sk = sockets; i < num; sk = sk->next) |
773 | { |
774 | if(sk->state == SOCK_STL) |
775 | { |
776 | num--; |
777 | continue; |
778 | } |
779 | pfds[i].fd = sk->fd; |
780 | pfds[i].events = 0; |
781 | if(!sk->ignread) |
782 | pfds[i].events |= POLLIN; |
783 | if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0)) |
784 | pfds[i].events |= POLLOUT; |
785 | pfds[i].revents = 0; |
786 | i++; |
787 | } |
788 | ret = poll(pfds, num, timeout); |
789 | if(ret < 0) |
790 | { |
791 | if(errno != EINTR) |
792 | { |
793 | flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno)); |
794 | /* To avoid CPU hogging in case it's bad, which it |
795 | * probably is. */ |
796 | sleep(1); |
797 | } |
798 | free(pfds); |
799 | return(1); |
800 | } |
801 | for(sk = sockets; sk != NULL; sk = next) |
802 | { |
803 | next = sk->next; |
804 | for(i = 0; i < num; i++) |
805 | { |
806 | if(pfds[i].fd == sk->fd) |
807 | break; |
808 | } |
809 | if(i == num) |
810 | continue; |
811 | switch(sk->state) |
812 | { |
813 | case SOCK_LST: |
814 | if(pfds[i].revents & POLLIN) |
815 | { |
816 | sslen = sizeof(ss); |
817 | if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0) |
cab0b442 |
818 | { |
819 | if(sk->errcb != NULL) |
820 | sk->errcb(sk, errno, sk->data); |
821 | } |
d3372da9 |
822 | newsk = newsock(sk->type); |
823 | newsk->fd = newfd; |
824 | newsk->family = sk->family; |
825 | newsk->state = SOCK_EST; |
826 | memcpy(newsk->remote = smalloc(sslen), &ss, sslen); |
827 | newsk->remotelen = sslen; |
828 | putsock(newsk); |
cab0b442 |
829 | if(sk->acceptcb != NULL) |
830 | sk->acceptcb(sk, newsk, sk->data); |
d3372da9 |
831 | } |
832 | if(pfds[i].revents & POLLERR) |
833 | { |
834 | retlen = sizeof(ret); |
835 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
836 | if(sk->errcb != NULL) |
837 | sk->errcb(sk, ret, sk->data); |
d3372da9 |
838 | continue; |
839 | } |
840 | break; |
841 | case SOCK_SYN: |
842 | if(pfds[i].revents & POLLERR) |
843 | { |
844 | retlen = sizeof(ret); |
845 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
846 | if(sk->conncb != NULL) |
847 | sk->conncb(sk, ret, sk->data); |
d3372da9 |
848 | closesock(sk); |
849 | continue; |
850 | } |
851 | if(pfds[i].revents & (POLLIN | POLLOUT)) |
852 | { |
853 | sk->state = SOCK_EST; |
cab0b442 |
854 | if(sk->conncb != NULL) |
855 | sk->conncb(sk, 0, sk->data); |
d3372da9 |
856 | } |
857 | break; |
858 | case SOCK_EST: |
859 | if(pfds[i].revents & POLLERR) |
860 | { |
861 | retlen = sizeof(ret); |
862 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
863 | if(sk->errcb != NULL) |
864 | sk->errcb(sk, ret, sk->data); |
d3372da9 |
865 | closesock(sk); |
866 | continue; |
867 | } |
868 | if(pfds[i].revents & POLLIN) |
869 | sockrecv(sk); |
870 | if(pfds[i].revents & POLLOUT) |
871 | { |
872 | if(sockqueuesize(sk) > 0) |
873 | sockflush(sk); |
874 | } |
875 | break; |
876 | } |
877 | if(pfds[i].revents & POLLNVAL) |
878 | { |
879 | flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd); |
880 | sk->state = SOCK_STL; |
881 | unlinksock(sk); |
882 | continue; |
883 | } |
884 | if(pfds[i].revents & POLLHUP) |
885 | { |
cab0b442 |
886 | if(sk->errcb != NULL) |
887 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
888 | closesock(sk); |
889 | unlinksock(sk); |
890 | continue; |
891 | } |
892 | } |
893 | free(pfds); |
894 | for(sk = sockets; sk != NULL; sk = next) |
895 | { |
896 | next = sk->next; |
897 | if(sk->refcount == 1 && (sockqueuesize(sk) == 0)) |
898 | { |
899 | unlinksock(sk); |
900 | continue; |
901 | } |
902 | if(sk->close && (sockqueuesize(sk) == 0)) |
903 | closesock(sk); |
904 | if(sk->state == SOCK_STL) |
905 | { |
906 | unlinksock(sk); |
907 | continue; |
908 | } |
909 | } |
910 | return(1); |
911 | } |
912 | |
913 | int socksettos(struct socket *sk, int tos) |
914 | { |
b020fb3d |
915 | int buf; |
916 | |
7ab36fbd |
917 | if(sk->family == AF_UNIX) |
918 | return(0); /* Unix sockets are always perfect. :) */ |
d3372da9 |
919 | if(sk->family == AF_INET) |
920 | { |
b020fb3d |
921 | switch(tos) |
922 | { |
b198bed6 |
923 | case 0: |
924 | buf = 0; |
925 | break; |
b020fb3d |
926 | case SOCK_TOS_MINCOST: |
18c1ae1d |
927 | buf = 0x02; |
b020fb3d |
928 | break; |
929 | case SOCK_TOS_MAXREL: |
18c1ae1d |
930 | buf = 0x04; |
b020fb3d |
931 | break; |
932 | case SOCK_TOS_MAXTP: |
18c1ae1d |
933 | buf = 0x08; |
b020fb3d |
934 | break; |
935 | case SOCK_TOS_MINDELAY: |
18c1ae1d |
936 | buf = 0x10; |
b020fb3d |
937 | break; |
938 | default: |
939 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
940 | return(-1); |
941 | } |
942 | if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 |
943 | { |
944 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); |
945 | return(-1); |
946 | } |
947 | return(0); |
948 | } |
b020fb3d |
949 | if(sk->family == AF_INET6) |
950 | { |
951 | switch(tos) |
952 | { |
b198bed6 |
953 | case 0: |
954 | buf = 0; |
b020fb3d |
955 | case SOCK_TOS_MINCOST: |
956 | buf = confgetint("net", "diffserv-mincost"); |
957 | break; |
958 | case SOCK_TOS_MAXREL: |
959 | buf = confgetint("net", "diffserv-maxrel"); |
960 | break; |
961 | case SOCK_TOS_MAXTP: |
962 | buf = confgetint("net", "diffserv-maxtp"); |
963 | break; |
964 | case SOCK_TOS_MINDELAY: |
965 | buf = confgetint("net", "diffserv-mindelay"); |
966 | break; |
967 | default: |
968 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
969 | return(-1); |
970 | } |
971 | /* |
972 | On Linux, the API IPv6 flow label management doesn't seem to |
973 | be entirely complete, so I guess this will have to wait. |
974 | |
975 | if(setsockopt(...) < 0) |
976 | { |
977 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); |
978 | return(-1); |
979 | } |
980 | */ |
981 | return(0); |
982 | } |
d3372da9 |
983 | flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family); |
984 | return(1); |
985 | } |
986 | |
987 | struct resolvedata |
988 | { |
989 | int fd; |
990 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); |
991 | void *data; |
992 | struct sockaddr_storage addr; |
993 | int addrlen; |
994 | }; |
995 | |
996 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) |
997 | { |
998 | static char buf[80]; |
999 | int ret; |
1000 | struct sockaddr_in *ipv4; |
1001 | |
1002 | if(!status) |
1003 | { |
1004 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) |
1005 | { |
1006 | errno = ENONET; |
1007 | data->callback(NULL, 0, data->data); |
1008 | } else { |
1009 | ipv4 = (struct sockaddr_in *)&data->addr; |
1010 | memcpy(&ipv4->sin_addr, buf, 4); |
1011 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); |
1012 | } |
1013 | } else { |
1014 | errno = ENONET; |
1015 | data->callback(NULL, 0, data->data); |
1016 | } |
1017 | close(data->fd); |
1018 | free(data); |
1019 | } |
1020 | |
1021 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) |
1022 | { |
1023 | int i; |
1024 | char *p; |
1025 | int port; |
1026 | int pfd[2]; |
1027 | pid_t child; |
1028 | struct resolvedata *rdata; |
1029 | struct sockaddr_in ipv4; |
1030 | struct hostent *he; |
1031 | sigset_t sigset; |
1032 | |
1033 | /* IPv4 */ |
1034 | port = -1; |
1035 | if((p = strchr(addr, ':')) != NULL) |
1036 | { |
1037 | *p = 0; |
1038 | port = atoi(p + 1); |
1039 | } |
1040 | ipv4.sin_family = AF_INET; |
1041 | ipv4.sin_port = htons(port); |
1042 | if(inet_aton(addr, &ipv4.sin_addr)) |
1043 | { |
1044 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); |
1045 | } else { |
1046 | sigemptyset(&sigset); |
1047 | sigaddset(&sigset, SIGCHLD); |
1048 | sigprocmask(SIG_BLOCK, &sigset, NULL); |
1049 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) |
1050 | { |
1051 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1052 | return(-1); |
1053 | } |
1054 | if(child == 0) |
1055 | { |
1056 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1057 | for(i = 3; i < FD_SETSIZE; i++) |
1058 | { |
1059 | if(i != pfd[1]) |
1060 | close(i); |
1061 | } |
1062 | signal(SIGALRM, SIG_DFL); |
1063 | alarm(30); |
1064 | if((he = gethostbyname(addr)) == NULL) |
1065 | exit(1); |
1066 | write(pfd[1], he->h_addr_list[0], 4); |
1067 | exit(0); |
1068 | } else { |
1069 | close(pfd[1]); |
1070 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); |
1071 | rdata = smalloc(sizeof(*rdata)); |
1072 | rdata->fd = pfd[0]; |
1073 | rdata->callback = callback; |
1074 | rdata->data = data; |
1075 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); |
1076 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); |
1077 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1078 | return(1); |
1079 | } |
1080 | } |
1081 | return(0); |
1082 | } |
1083 | |
1084 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1085 | { |
1086 | socklen_t len; |
1087 | struct sockaddr_storage name; |
1088 | |
1089 | *namebuf = NULL; |
1090 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
1091 | return(-1); |
1092 | len = sizeof(name); |
1093 | if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0) |
1094 | { |
6fb0c6ac |
1095 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 |
1096 | return(-1); |
1097 | } |
1098 | *namebuf = memcpy(smalloc(len), &name, len); |
b870805e |
1099 | if(lenbuf != NULL) |
1100 | *lenbuf = len; |
d3372da9 |
1101 | return(0); |
1102 | } |
1103 | |
eaa35963 |
1104 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1105 | { |
1106 | if(dst->sa_family != src->sa_family) |
1107 | { |
1108 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); |
1109 | return; |
1110 | } |
1111 | switch(src->sa_family) |
1112 | { |
1113 | case AF_INET: |
1114 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; |
1115 | break; |
1116 | case AF_INET6: |
1117 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; |
1118 | break; |
1119 | default: |
1120 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); |
1121 | break; |
1122 | } |
1123 | } |
1124 | |
1125 | static int makepublic(struct sockaddr *addr) |
d3372da9 |
1126 | { |
6fb0c6ac |
1127 | int ret; |
eaa35963 |
1128 | socklen_t plen; |
1129 | struct sockaddr *pname; |
1130 | |
1131 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) |
1132 | { |
1133 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); |
1134 | return(-1); |
1135 | } |
1136 | if(ret) |
1137 | return(0); |
1138 | sethostaddr(addr, pname); |
1139 | free(pname); |
1140 | return(0); |
1141 | } |
1142 | |
1143 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1144 | { |
d3372da9 |
1145 | socklen_t len; |
6fb0c6ac |
1146 | struct sockaddr *name; |
d3372da9 |
1147 | |
1148 | switch(confgetint("net", "mode")) |
1149 | { |
1150 | case 0: |
1151 | *namebuf = NULL; |
1152 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
d3372da9 |
1153 | { |
eaa35963 |
1154 | errno = EBADF; |
d3372da9 |
1155 | return(-1); |
1156 | } |
6fb0c6ac |
1157 | if(!sockgetlocalname(sk, &name, &len)) |
1158 | { |
1159 | *namebuf = name; |
1160 | *lenbuf = len; |
eaa35963 |
1161 | makepublic(name); |
6fb0c6ac |
1162 | return(0); |
1163 | } |
1164 | flog(LOG_ERR, "could not get remotely accessible name by any means"); |
1165 | return(-1); |
d3372da9 |
1166 | case 1: |
1167 | errno = EOPNOTSUPP; |
1168 | return(-1); |
1169 | default: |
1170 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); |
1171 | errno = EOPNOTSUPP; |
1172 | return(-1); |
1173 | } |
1174 | } |
1175 | |
d29853b1 |
1176 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1177 | { |
1178 | struct sockaddr *name1, *name2; |
1179 | socklen_t len1, len2; |
1180 | |
1181 | if(sk->family != sk2->family) |
1182 | { |
1183 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family); |
1184 | return(-1); |
1185 | } |
3804379d |
1186 | if(sockgetremotename(sk, &name1, &len1)) |
d29853b1 |
1187 | return(-1); |
3804379d |
1188 | if(sockgetremotename(sk2, &name2, &len2)) { |
d29853b1 |
1189 | free(name1); |
1190 | return(-1); |
1191 | } |
1192 | sethostaddr(name1, name2); |
1193 | free(name2); |
1194 | *namebuf = name1; |
1195 | *lenbuf = len1; |
1196 | return(0); |
1197 | } |
1198 | |
99a28d47 |
1199 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1200 | { |
1201 | struct sockaddr_un *u1, *u2; |
1202 | struct sockaddr_in *n1, *n2; |
1203 | #ifdef HAVE_IPV6 |
1204 | struct sockaddr_in6 *s1, *s2; |
1205 | #endif |
1206 | |
1207 | if(x->sa_family != y->sa_family) |
1208 | return(0); |
1209 | switch(x->sa_family) { |
1210 | case AF_UNIX: |
1211 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; |
1212 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) |
1213 | return(0); |
1214 | break; |
1215 | case AF_INET: |
1216 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; |
1217 | if(n1->sin_port != n2->sin_port) |
1218 | return(0); |
1219 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) |
1220 | return(0); |
1221 | break; |
c8a729d7 |
1222 | #ifdef HAVE_IPV6 |
99a28d47 |
1223 | case AF_INET6: |
1224 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; |
1225 | if(s1->sin6_port != s2->sin6_port) |
1226 | return(0); |
1227 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) |
1228 | return(0); |
1229 | break; |
c8a729d7 |
1230 | #endif |
99a28d47 |
1231 | } |
1232 | return(1); |
1233 | } |
1234 | |
d3372da9 |
1235 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1236 | { |
1237 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with |
1238 | * lowercase letters to 1, so I do this |
1239 | * instead. */ |
1240 | struct sockaddr_in *ipv4; |
1241 | #ifdef HAVE_IPV6 |
1242 | struct sockaddr_in6 *ipv6; |
1243 | #endif |
1244 | static char *ret = NULL; |
1245 | char buf[1024]; |
1246 | |
1247 | if(ret != NULL) |
1248 | free(ret); |
1249 | ret = NULL; |
1250 | switch(arg->sa_family) |
1251 | { |
1252 | case AF_UNIX: |
1253 | UNIX = (struct sockaddr_un *)arg; |
1254 | ret = sprintf2("%s", UNIX->sun_path); |
1255 | break; |
1256 | case AF_INET: |
1257 | ipv4 = (struct sockaddr_in *)arg; |
1258 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) |
1259 | return(NULL); |
1260 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); |
1261 | break; |
1262 | #ifdef HAVE_IPV6 |
1263 | case AF_INET6: |
1264 | ipv6 = (struct sockaddr_in6 *)arg; |
1265 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) |
1266 | return(NULL); |
fc7f7735 |
1267 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 |
1268 | break; |
1269 | #endif |
1270 | default: |
1271 | errno = EPFNOSUPPORT; |
1272 | break; |
1273 | } |
1274 | return(ret); |
1275 | } |
1276 | |
1277 | #if 0 |
1278 | |
1279 | /* |
1280 | * It was very nice to use this, but it seems |
1281 | * to mess things up, so I guess it has to go... :-( |
1282 | */ |
1283 | |
1284 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) |
1285 | { |
1286 | struct sockaddr *arg; |
1287 | socklen_t arglen; |
1288 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with |
1289 | * lowercase letters to 1, so I do this |
1290 | * instead. */ |
1291 | struct sockaddr_in *ipv4; |
1292 | int ret; |
1293 | |
1294 | arg = *(struct sockaddr **)(args[0]); |
1295 | arglen = *(socklen_t *)(args[1]); |
1296 | switch(arg->sa_family) |
1297 | { |
1298 | case AF_UNIX: |
1299 | UNIX = (struct sockaddr_un *)arg; |
1300 | ret = fprintf(stream, "%s", UNIX->sun_path); |
1301 | break; |
1302 | case AF_INET: |
1303 | ipv4 = (struct sockaddr_in *)arg; |
1304 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); |
1305 | break; |
1306 | default: |
1307 | ret = -1; |
1308 | errno = EPFNOSUPPORT; |
1309 | break; |
1310 | } |
1311 | return(ret); |
1312 | } |
1313 | |
1314 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) |
1315 | { |
1316 | if(n > 0) |
1317 | argtypes[0] = PA_POINTER; |
1318 | if(n > 1) |
1319 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ |
1320 | * be an int, so I guess this should be |
1321 | * safe. */ |
1322 | return(2); |
1323 | } |
1324 | #endif |
1325 | |
1326 | static int init(int hup) |
1327 | { |
1328 | if(!hup) |
1329 | { |
1330 | /* |
1331 | if(register_printf_function('N', formataddress, formataddress_arginfo)) |
1332 | { |
1333 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); |
1334 | return(1); |
1335 | } |
1336 | */ |
1337 | } |
1338 | return(0); |
1339 | } |
1340 | |
1341 | static void terminate(void) |
1342 | { |
1343 | while(sockets != NULL) |
1344 | unlinksock(sockets); |
1345 | } |
1346 | |
1347 | static struct module me = |
1348 | { |
1349 | .name = "net", |
1350 | .conf = |
1351 | { |
1352 | .vars = myvars |
1353 | }, |
1354 | .init = init, |
1355 | .terminate = terminate |
1356 | }; |
1357 | |
1358 | MODULE(me) |