d3372da9 |
1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client |
302a2600 |
3 | * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com> |
d3372da9 |
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; |
a8c5ada6 |
186 | new->ucred.uid = -1; |
187 | new->ucred.gid = -1; |
d3372da9 |
188 | switch(type) |
189 | { |
190 | case SOCK_STREAM: |
191 | new->outbuf.s.buf = NULL; |
192 | new->outbuf.s.bufsize = 0; |
193 | new->outbuf.s.datasize = 0; |
194 | new->inbuf.s.buf = NULL; |
195 | new->inbuf.s.bufsize = 0; |
196 | new->inbuf.s.datasize = 0; |
197 | break; |
198 | case SOCK_DGRAM: |
199 | new->outbuf.d.f = new->outbuf.d.l = NULL; |
200 | new->inbuf.d.f = new->inbuf.d.l = NULL; |
201 | break; |
202 | } |
cab0b442 |
203 | new->conncb = NULL; |
204 | new->errcb = NULL; |
205 | new->readcb = NULL; |
206 | new->writecb = NULL; |
207 | new->acceptcb = NULL; |
d3372da9 |
208 | new->next = sockets; |
209 | new->prev = NULL; |
210 | if(sockets != NULL) |
211 | sockets->prev = new; |
212 | sockets = new; |
213 | numsocks++; |
214 | return(new); |
215 | } |
216 | |
217 | static struct socket *mksock(int domain, int type) |
218 | { |
219 | int fd; |
220 | struct socket *new; |
221 | |
222 | if((fd = socket(domain, type, 0)) < 0) |
223 | { |
224 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); |
225 | return(NULL); |
226 | } |
227 | new = newsock(type); |
228 | new->fd = fd; |
229 | new->family = domain; |
230 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
231 | return(new); |
232 | } |
233 | |
234 | struct socket *wrapsock(int fd) |
235 | { |
236 | struct socket *new; |
237 | |
238 | new = newsock(SOCK_STREAM); |
239 | new->fd = fd; |
240 | new->state = SOCK_EST; |
241 | new->isrealsocket = 0; |
242 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
243 | return(new); |
244 | } |
245 | |
246 | static void unlinksock(struct socket *sk) |
247 | { |
248 | if(sk->prev != NULL) |
249 | sk->prev->next = sk->next; |
250 | if(sk->next != NULL) |
251 | sk->next->prev = sk->prev; |
252 | if(sk == sockets) |
253 | sockets = sk->next; |
254 | putsock(sk); |
255 | numsocks--; |
256 | } |
257 | |
258 | void getsock(struct socket *sk) |
259 | { |
260 | sk->refcount++; |
261 | } |
262 | |
263 | void putsock(struct socket *sk) |
264 | { |
265 | struct dgrambuf *buf; |
266 | |
267 | if(--(sk->refcount) == 0) |
268 | { |
269 | switch(sk->type) |
270 | { |
271 | case SOCK_STREAM: |
272 | if(sk->outbuf.s.buf != NULL) |
273 | free(sk->outbuf.s.buf); |
274 | if(sk->inbuf.s.buf != NULL) |
275 | free(sk->inbuf.s.buf); |
276 | break; |
277 | case SOCK_DGRAM: |
278 | while((buf = sk->outbuf.d.f) != NULL) |
279 | { |
280 | sk->outbuf.d.f = buf->next; |
281 | free(buf->data); |
161604ea |
282 | free(buf->addr); |
d3372da9 |
283 | free(buf); |
284 | } |
285 | while((buf = sk->inbuf.d.f) != NULL) |
286 | { |
287 | sk->inbuf.d.f = buf->next; |
288 | free(buf->data); |
161604ea |
289 | free(buf->addr); |
d3372da9 |
290 | free(buf); |
291 | } |
292 | break; |
293 | } |
b870805e |
294 | closesock(sk); |
d3372da9 |
295 | if(sk->remote != NULL) |
296 | free(sk->remote); |
297 | free(sk); |
298 | } |
299 | } |
300 | |
336539c2 |
301 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
302 | { |
303 | switch(sk->type) |
304 | { |
305 | case SOCK_STREAM: |
306 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1); |
307 | memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize); |
308 | memcpy(sk->inbuf.s.buf, buf, size); |
309 | sk->inbuf.s.datasize += size; |
310 | break; |
311 | case SOCK_DGRAM: |
312 | /* XXX */ |
313 | break; |
314 | } |
315 | return; |
316 | } |
317 | |
d3372da9 |
318 | void *sockgetinbuf(struct socket *sk, size_t *size) |
319 | { |
320 | void *buf; |
321 | struct dgrambuf *dbuf; |
322 | |
323 | switch(sk->type) |
324 | { |
325 | case SOCK_STREAM: |
326 | if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0)) |
327 | { |
328 | *size = 0; |
329 | return(NULL); |
330 | } |
331 | buf = sk->inbuf.s.buf; |
332 | *size = sk->inbuf.s.datasize; |
333 | sk->inbuf.s.buf = NULL; |
334 | sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0; |
335 | return(buf); |
336 | case SOCK_DGRAM: |
337 | if((dbuf = sk->inbuf.d.f) == NULL) |
338 | return(NULL); |
339 | sk->inbuf.d.f = dbuf->next; |
340 | if(dbuf->next == NULL) |
341 | sk->inbuf.d.l = NULL; |
342 | buf = dbuf->data; |
343 | *size = dbuf->size; |
344 | free(dbuf->addr); |
345 | free(dbuf); |
346 | return(buf); |
347 | } |
348 | return(NULL); |
349 | } |
350 | |
9e5f2b29 |
351 | static void recvcmsg(struct socket *sk, struct msghdr *msg) |
352 | { |
353 | struct cmsghdr *cmsg; |
9e5f2b29 |
354 | |
355 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) |
356 | { |
a8c5ada6 |
357 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 |
358 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
359 | { |
a8c5ada6 |
360 | struct ucred *cred; |
361 | if(sk->ucred.uid == -1) |
9e5f2b29 |
362 | { |
363 | cred = (struct ucred *)CMSG_DATA(cmsg); |
a8c5ada6 |
364 | sk->ucred.uid = cred->uid; |
365 | sk->ucred.gid = cred->gid; |
9e5f2b29 |
366 | } |
367 | } |
a8c5ada6 |
368 | #endif |
9e5f2b29 |
369 | } |
370 | } |
371 | |
d3372da9 |
372 | static void sockrecv(struct socket *sk) |
373 | { |
374 | int ret, inq; |
375 | struct dgrambuf *dbuf; |
9e5f2b29 |
376 | struct msghdr msg; |
377 | char cbuf[65536]; |
378 | struct iovec bufvec; |
d3372da9 |
379 | |
9e5f2b29 |
380 | memset(&msg, 0, sizeof(msg)); |
381 | msg.msg_iov = &bufvec; |
382 | msg.msg_iovlen = 1; |
383 | msg.msg_control = cbuf; |
384 | msg.msg_controllen = sizeof(cbuf); |
d3372da9 |
385 | switch(sk->type) |
386 | { |
387 | case SOCK_STREAM: |
388 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
389 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea |
390 | * how to read the inqueue size on other OSs */ |
391 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
392 | { |
393 | /* I don't really know what could go wrong here, so let's |
394 | * assume it's transient. */ |
395 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd); |
396 | inq = 2048; |
397 | } |
398 | #else |
399 | inq = 2048; |
400 | #endif |
401 | if(inq > 65536) |
402 | inq = 65536; |
403 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1); |
987518f8 |
404 | if(sk->isrealsocket) |
405 | { |
406 | bufvec.iov_base = sk->inbuf.s.buf + sk->inbuf.s.datasize; |
407 | bufvec.iov_len = inq; |
408 | ret = recvmsg(sk->fd, &msg, 0); |
409 | } else { |
410 | ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq); |
411 | msg.msg_controllen = 0; |
412 | msg.msg_flags = 0; |
413 | } |
d3372da9 |
414 | if(ret < 0) |
415 | { |
416 | if((errno == EINTR) || (errno == EAGAIN)) |
417 | return; |
cab0b442 |
418 | if(sk->errcb != NULL) |
419 | sk->errcb(sk, errno, sk->data); |
d3372da9 |
420 | closesock(sk); |
421 | return; |
422 | } |
9e5f2b29 |
423 | if(msg.msg_flags & MSG_CTRUNC) |
424 | flog(LOG_DEBUG, "ancillary data was truncated"); |
425 | else |
426 | recvcmsg(sk, &msg); |
d3372da9 |
427 | if(ret == 0) |
428 | { |
cab0b442 |
429 | if(sk->errcb != NULL) |
430 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
431 | closesock(sk); |
432 | return; |
433 | } |
434 | sk->inbuf.s.datasize += ret; |
cab0b442 |
435 | if(sk->readcb != NULL) |
436 | sk->readcb(sk, sk->data); |
d3372da9 |
437 | break; |
438 | case SOCK_DGRAM: |
9e5f2b29 |
439 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
d3372da9 |
440 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
441 | { |
442 | /* I don't really know what could go wrong here, so let's |
443 | * assume it's transient. */ |
444 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd); |
445 | return; |
446 | } |
9e5f2b29 |
447 | #else |
448 | inq = 65536; |
449 | #endif |
d3372da9 |
450 | dbuf = smalloc(sizeof(*dbuf)); |
451 | dbuf->data = smalloc(inq); |
452 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); |
9e5f2b29 |
453 | /* |
d3372da9 |
454 | ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen); |
9e5f2b29 |
455 | */ |
456 | msg.msg_name = dbuf->addr; |
457 | msg.msg_namelen = dbuf->addrlen; |
458 | bufvec.iov_base = dbuf->data; |
459 | bufvec.iov_len = inq; |
460 | ret = recvmsg(sk->fd, &msg, 0); |
461 | dbuf->addrlen = msg.msg_namelen; |
d3372da9 |
462 | if(ret < 0) |
463 | { |
464 | free(dbuf->addr); |
465 | free(dbuf->data); |
466 | free(dbuf); |
467 | if((errno == EINTR) || (errno == EAGAIN)) |
468 | return; |
cab0b442 |
469 | if(sk->errcb != NULL) |
470 | sk->errcb(sk, errno, sk->data); |
d3372da9 |
471 | closesock(sk); |
472 | return; |
473 | } |
9e5f2b29 |
474 | if(msg.msg_flags & MSG_CTRUNC) |
475 | flog(LOG_DEBUG, "ancillary data was truncated"); |
476 | else |
477 | recvcmsg(sk, &msg); |
d3372da9 |
478 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
479 | * have EOF), but rather an empty packet. I don't know if any |
480 | * other potential DGRAM protocols might have an EOF |
481 | * condition, so let's play safe. */ |
482 | if(ret == 0) |
483 | { |
484 | free(dbuf->addr); |
485 | free(dbuf->data); |
486 | free(dbuf); |
487 | if(!((sk->family == AF_INET) || (sk->family == AF_INET6))) |
488 | { |
cab0b442 |
489 | if(sk->errcb != NULL) |
490 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
491 | closesock(sk); |
492 | } |
493 | return; |
494 | } |
495 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); |
496 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); |
497 | dbuf->next = NULL; |
498 | if(sk->inbuf.d.l != NULL) |
499 | sk->inbuf.d.l->next = dbuf; |
500 | else |
501 | sk->inbuf.d.f = dbuf; |
502 | sk->inbuf.d.l = dbuf; |
cab0b442 |
503 | if(sk->readcb != NULL) |
504 | sk->readcb(sk, sk->data); |
d3372da9 |
505 | break; |
506 | } |
507 | } |
508 | |
509 | static void sockflush(struct socket *sk) |
510 | { |
511 | int ret; |
512 | struct dgrambuf *dbuf; |
513 | |
514 | switch(sk->type) |
515 | { |
516 | case SOCK_STREAM: |
517 | if(sk->isrealsocket) |
518 | ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); |
519 | else |
520 | ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize); |
521 | if(ret < 0) |
522 | { |
523 | /* For now, assume transient error, since |
524 | * the socket is polled for errors */ |
525 | break; |
526 | } |
527 | if(ret > 0) |
528 | { |
529 | memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret); |
cab0b442 |
530 | if(sk->writecb != NULL) |
531 | sk->writecb(sk, sk->data); |
d3372da9 |
532 | } |
533 | break; |
534 | case SOCK_DGRAM: |
535 | dbuf = sk->outbuf.d.f; |
536 | if((sk->outbuf.d.f = dbuf->next) == NULL) |
537 | sk->outbuf.d.l = NULL; |
538 | sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); |
539 | free(dbuf->data); |
540 | free(dbuf->addr); |
541 | free(dbuf); |
cab0b442 |
542 | if(sk->writecb != NULL) |
543 | sk->writecb(sk, sk->data); |
d3372da9 |
544 | break; |
545 | } |
546 | } |
547 | |
548 | void closesock(struct socket *sk) |
549 | { |
b870805e |
550 | struct sockaddr_un *un; |
551 | |
552 | if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)&un, NULL) && (un->sun_family == PF_UNIX)) |
553 | { |
7ab36fbd |
554 | if((sk->state == SOCK_LST) && strchr(un->sun_path, '/')) |
b870805e |
555 | { |
556 | if(unlink(un->sun_path)) |
7ab36fbd |
557 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); |
b870805e |
558 | } |
559 | } |
d3372da9 |
560 | sk->state = SOCK_STL; |
561 | close(sk->fd); |
562 | sk->fd = -1; |
563 | sk->close = 0; |
564 | } |
565 | |
566 | void sockqueue(struct socket *sk, void *data, size_t size) |
567 | { |
568 | struct dgrambuf *new; |
569 | |
570 | if(sk->state == SOCK_STL) |
571 | return; |
572 | switch(sk->type) |
573 | { |
574 | case SOCK_STREAM: |
575 | sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1); |
576 | memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size); |
577 | sk->outbuf.s.datasize += size; |
578 | break; |
579 | case SOCK_DGRAM: |
580 | if(sk->remote == NULL) |
581 | return; |
582 | new = smalloc(sizeof(*new)); |
583 | new->next = NULL; |
584 | memcpy(new->data = smalloc(size), data, new->size = size); |
585 | memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen); |
586 | if(sk->outbuf.d.l == NULL) |
587 | { |
588 | sk->outbuf.d.l = sk->outbuf.d.f = new; |
589 | } else { |
590 | sk->outbuf.d.l->next = new; |
591 | sk->outbuf.d.l = new; |
592 | } |
593 | break; |
594 | } |
595 | } |
596 | |
597 | size_t sockgetdatalen(struct socket *sk) |
598 | { |
599 | struct dgrambuf *b; |
600 | size_t ret; |
601 | |
602 | switch(sk->type) |
603 | { |
604 | case SOCK_STREAM: |
605 | ret = sk->inbuf.s.datasize; |
606 | break; |
607 | case SOCK_DGRAM: |
608 | ret = 0; |
609 | for(b = sk->inbuf.d.f; b != NULL; b = b->next) |
610 | ret += b->size; |
611 | break; |
612 | } |
613 | return(ret); |
614 | } |
615 | |
616 | size_t sockqueuesize(struct socket *sk) |
617 | { |
618 | struct dgrambuf *b; |
619 | size_t ret; |
620 | |
621 | switch(sk->type) |
622 | { |
623 | case SOCK_STREAM: |
624 | ret = sk->outbuf.s.datasize; |
625 | break; |
626 | case SOCK_DGRAM: |
627 | ret = 0; |
628 | for(b = sk->outbuf.d.f; b != NULL; b = b->next) |
629 | ret += b->size; |
630 | break; |
631 | } |
632 | return(ret); |
633 | } |
634 | |
d3372da9 |
635 | /* |
7ab36fbd |
636 | * Seriously, I don't know if it's naughty or not to remove |
637 | * pre-existing Unix sockets. |
638 | */ |
639 | static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen) |
640 | { |
641 | struct sockaddr_un *un; |
642 | struct stat sb; |
643 | |
644 | if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
645 | return(-1); |
646 | un = (struct sockaddr_un *)name; |
647 | if(stat(un->sun_path, &sb)) |
648 | return(-1); |
649 | if(!S_ISSOCK(sb.st_mode)) |
650 | return(-1); |
651 | if(unlink(un->sun_path)) |
652 | return(-1); |
653 | if(bind(sk->fd, name, namelen) < 0) |
654 | return(-1); |
655 | return(0); |
656 | } |
657 | |
658 | /* |
d3372da9 |
659 | * The difference between netcslisten() and netcslistenlocal() is that |
660 | * netcslistenlocal() always listens on the local host, instead of |
661 | * following proxy/passive mode directions. It is suitable for eg. the |
662 | * UI channel, while the file sharing networks should, naturally, use |
663 | * netcslisten() instead. |
664 | */ |
665 | |
cab0b442 |
666 | struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
d3372da9 |
667 | { |
668 | struct socket *sk; |
66c517d2 |
669 | int intbuf; |
d3372da9 |
670 | |
671 | /* I don't know if this is actually correct (it probably isn't), |
672 | * but since, at on least Linux systems, PF_* are specifically |
673 | * #define'd to their AF_* counterparts, it allows for a severely |
674 | * smoother implementation. If it breaks something on your |
675 | * platform, please tell me so. |
676 | */ |
677 | if((sk = mksock(name->sa_family, type)) == NULL) |
678 | return(NULL); |
679 | sk->state = SOCK_LST; |
687b2ee2 |
680 | if(confgetint("net", "reuseaddr")) |
681 | { |
682 | intbuf = 1; |
683 | setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
684 | } |
7ab36fbd |
685 | if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0))) |
d3372da9 |
686 | { |
687 | putsock(sk); |
688 | return(NULL); |
689 | } |
690 | if(listen(sk->fd, 16) < 0) |
691 | { |
692 | putsock(sk); |
693 | return(NULL); |
694 | } |
cab0b442 |
695 | sk->acceptcb = func; |
696 | sk->data = data; |
d3372da9 |
697 | return(sk); |
698 | } |
699 | |
cab0b442 |
700 | struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
c23acc61 |
701 | { |
702 | if(confgetint("net", "mode") == 1) |
703 | { |
704 | errno = EOPNOTSUPP; |
705 | return(NULL); |
706 | } |
c23acc61 |
707 | if(confgetint("net", "mode") == 0) |
708 | return(netcslistenlocal(type, name, namelen, func, data)); |
709 | errno = EOPNOTSUPP; |
710 | return(NULL); |
711 | } |
712 | |
cab0b442 |
713 | struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data) |
0a1bc5b1 |
714 | { |
715 | struct sockaddr_in addr; |
716 | #ifdef HAVE_IPV6 |
717 | struct sockaddr_in6 addr6; |
718 | #endif |
cab0b442 |
719 | struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *); |
0a1bc5b1 |
720 | struct socket *ret; |
721 | |
722 | if(local) |
723 | csfunc = netcslistenlocal; |
724 | else |
725 | csfunc = netcslisten; |
726 | #ifdef HAVE_IPV6 |
727 | memset(&addr6, 0, sizeof(addr6)); |
728 | addr6.sin6_family = AF_INET6; |
729 | addr6.sin6_port = htons(port); |
730 | addr6.sin6_addr = in6addr_any; |
731 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) |
732 | return(ret); |
733 | if((ret == NULL) && (errno != EAFNOSUPPORT)) |
734 | return(NULL); |
735 | #endif |
736 | memset(&addr, 0, sizeof(addr)); |
737 | addr.sin_family = AF_INET; |
738 | addr.sin_port = htons(port); |
739 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); |
740 | } |
741 | |
d3372da9 |
742 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
743 | { |
744 | struct socket *sk; |
745 | int mode; |
746 | |
747 | mode = confgetint("net", "mode"); |
748 | if((mode == 0) || (mode == 1)) |
749 | { |
750 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) |
751 | return(NULL); |
752 | if(bind(sk->fd, name, namelen) < 0) |
753 | { |
754 | putsock(sk); |
755 | return(NULL); |
756 | } |
757 | sk->state = SOCK_EST; |
758 | return(sk); |
759 | } |
760 | errno = EOPNOTSUPP; |
761 | return(NULL); |
762 | } |
763 | |
764 | struct socket *netdupsock(struct socket *sk) |
765 | { |
766 | struct socket *newsk; |
767 | |
768 | newsk = newsock(sk->type); |
769 | if((newsk->fd = dup(sk->fd)) < 0) |
770 | { |
771 | flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno)); |
772 | putsock(newsk); |
773 | return(NULL); |
774 | } |
775 | newsk->state = sk->state; |
776 | newsk->ignread = sk->ignread; |
777 | if(sk->remote != NULL) |
778 | memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen); |
779 | return(newsk); |
780 | } |
781 | |
782 | void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
783 | { |
784 | if(sk->remote != NULL) |
785 | free(sk->remote); |
786 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); |
787 | sk->ignread = 1; |
788 | } |
789 | |
cab0b442 |
790 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 |
791 | { |
792 | struct socket *sk; |
793 | int mode; |
794 | |
795 | mode = confgetint("net", "mode"); |
796 | if((mode == 0) || (mode == 1)) |
797 | { |
798 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) |
799 | return(NULL); |
800 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); |
801 | if(!connect(sk->fd, addr, addrlen)) |
802 | { |
803 | sk->state = SOCK_EST; |
804 | func(sk, 0, data); |
805 | return(sk); |
806 | } |
807 | if(errno == EINPROGRESS) |
808 | { |
809 | sk->state = SOCK_SYN; |
cab0b442 |
810 | sk->conncb = func; |
811 | sk->data = data; |
d3372da9 |
812 | return(sk); |
813 | } |
814 | putsock(sk); |
815 | return(NULL); |
816 | } |
817 | errno = EOPNOTSUPP; |
818 | return(NULL); |
819 | } |
820 | |
9e5f2b29 |
821 | static void acceptunix(struct socket *sk) |
822 | { |
823 | int buf; |
824 | |
825 | buf = 1; |
a8c5ada6 |
826 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 |
827 | if(setsockopt(sk->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
828 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", sk->fd, strerror(errno)); |
a8c5ada6 |
829 | #elif UNIX_AUTH_STYLE == 2 |
830 | if(getpeereid(sk->fd, &sk->ucred.uid, &sk->ucred.gid) < 0) |
831 | { |
832 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", sk->fd, strerror(errno)); |
833 | sk->ucred.uid = -1; |
834 | sk->ucred.gid = -1; |
835 | } |
836 | #endif |
9e5f2b29 |
837 | } |
838 | |
d3372da9 |
839 | int pollsocks(int timeout) |
840 | { |
eaa35963 |
841 | int i, num, ret; |
842 | socklen_t retlen; |
d3372da9 |
843 | int newfd; |
844 | struct pollfd *pfds; |
845 | struct socket *sk, *next, *newsk; |
846 | struct sockaddr_storage ss; |
847 | socklen_t sslen; |
848 | |
849 | pfds = smalloc(sizeof(*pfds) * (num = numsocks)); |
850 | for(i = 0, sk = sockets; i < num; sk = sk->next) |
851 | { |
852 | if(sk->state == SOCK_STL) |
853 | { |
854 | num--; |
855 | continue; |
856 | } |
857 | pfds[i].fd = sk->fd; |
858 | pfds[i].events = 0; |
859 | if(!sk->ignread) |
860 | pfds[i].events |= POLLIN; |
861 | if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0)) |
862 | pfds[i].events |= POLLOUT; |
863 | pfds[i].revents = 0; |
864 | i++; |
865 | } |
866 | ret = poll(pfds, num, timeout); |
867 | if(ret < 0) |
868 | { |
869 | if(errno != EINTR) |
870 | { |
871 | flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno)); |
872 | /* To avoid CPU hogging in case it's bad, which it |
873 | * probably is. */ |
874 | sleep(1); |
875 | } |
876 | free(pfds); |
877 | return(1); |
878 | } |
879 | for(sk = sockets; sk != NULL; sk = next) |
880 | { |
881 | next = sk->next; |
882 | for(i = 0; i < num; i++) |
883 | { |
884 | if(pfds[i].fd == sk->fd) |
885 | break; |
886 | } |
887 | if(i == num) |
888 | continue; |
889 | switch(sk->state) |
890 | { |
891 | case SOCK_LST: |
892 | if(pfds[i].revents & POLLIN) |
893 | { |
894 | sslen = sizeof(ss); |
895 | if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0) |
cab0b442 |
896 | { |
897 | if(sk->errcb != NULL) |
898 | sk->errcb(sk, errno, sk->data); |
899 | } |
d3372da9 |
900 | newsk = newsock(sk->type); |
901 | newsk->fd = newfd; |
902 | newsk->family = sk->family; |
903 | newsk->state = SOCK_EST; |
904 | memcpy(newsk->remote = smalloc(sslen), &ss, sslen); |
905 | newsk->remotelen = sslen; |
9e5f2b29 |
906 | if(ss.ss_family == PF_UNIX) |
907 | acceptunix(newsk); |
cab0b442 |
908 | if(sk->acceptcb != NULL) |
909 | sk->acceptcb(sk, newsk, sk->data); |
9e5f2b29 |
910 | putsock(newsk); |
d3372da9 |
911 | } |
912 | if(pfds[i].revents & POLLERR) |
913 | { |
914 | retlen = sizeof(ret); |
915 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
916 | if(sk->errcb != NULL) |
917 | sk->errcb(sk, ret, sk->data); |
d3372da9 |
918 | continue; |
919 | } |
920 | break; |
921 | case SOCK_SYN: |
922 | if(pfds[i].revents & POLLERR) |
923 | { |
924 | retlen = sizeof(ret); |
925 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
926 | if(sk->conncb != NULL) |
927 | sk->conncb(sk, ret, sk->data); |
d3372da9 |
928 | closesock(sk); |
929 | continue; |
930 | } |
931 | if(pfds[i].revents & (POLLIN | POLLOUT)) |
932 | { |
933 | sk->state = SOCK_EST; |
cab0b442 |
934 | if(sk->conncb != NULL) |
935 | sk->conncb(sk, 0, sk->data); |
d3372da9 |
936 | } |
937 | break; |
938 | case SOCK_EST: |
939 | if(pfds[i].revents & POLLERR) |
940 | { |
941 | retlen = sizeof(ret); |
942 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 |
943 | if(sk->errcb != NULL) |
944 | sk->errcb(sk, ret, sk->data); |
d3372da9 |
945 | closesock(sk); |
946 | continue; |
947 | } |
948 | if(pfds[i].revents & POLLIN) |
949 | sockrecv(sk); |
950 | if(pfds[i].revents & POLLOUT) |
951 | { |
952 | if(sockqueuesize(sk) > 0) |
953 | sockflush(sk); |
954 | } |
955 | break; |
956 | } |
957 | if(pfds[i].revents & POLLNVAL) |
958 | { |
959 | flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd); |
960 | sk->state = SOCK_STL; |
961 | unlinksock(sk); |
962 | continue; |
963 | } |
964 | if(pfds[i].revents & POLLHUP) |
965 | { |
cab0b442 |
966 | if(sk->errcb != NULL) |
967 | sk->errcb(sk, 0, sk->data); |
d3372da9 |
968 | closesock(sk); |
969 | unlinksock(sk); |
970 | continue; |
971 | } |
972 | } |
973 | free(pfds); |
974 | for(sk = sockets; sk != NULL; sk = next) |
975 | { |
976 | next = sk->next; |
977 | if(sk->refcount == 1 && (sockqueuesize(sk) == 0)) |
978 | { |
979 | unlinksock(sk); |
980 | continue; |
981 | } |
982 | if(sk->close && (sockqueuesize(sk) == 0)) |
983 | closesock(sk); |
984 | if(sk->state == SOCK_STL) |
985 | { |
986 | unlinksock(sk); |
987 | continue; |
988 | } |
989 | } |
990 | return(1); |
991 | } |
992 | |
993 | int socksettos(struct socket *sk, int tos) |
994 | { |
b020fb3d |
995 | int buf; |
996 | |
7ab36fbd |
997 | if(sk->family == AF_UNIX) |
998 | return(0); /* Unix sockets are always perfect. :) */ |
d3372da9 |
999 | if(sk->family == AF_INET) |
1000 | { |
b020fb3d |
1001 | switch(tos) |
1002 | { |
b198bed6 |
1003 | case 0: |
1004 | buf = 0; |
1005 | break; |
b020fb3d |
1006 | case SOCK_TOS_MINCOST: |
18c1ae1d |
1007 | buf = 0x02; |
b020fb3d |
1008 | break; |
1009 | case SOCK_TOS_MAXREL: |
18c1ae1d |
1010 | buf = 0x04; |
b020fb3d |
1011 | break; |
1012 | case SOCK_TOS_MAXTP: |
18c1ae1d |
1013 | buf = 0x08; |
b020fb3d |
1014 | break; |
1015 | case SOCK_TOS_MINDELAY: |
18c1ae1d |
1016 | buf = 0x10; |
b020fb3d |
1017 | break; |
1018 | default: |
1019 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
1020 | return(-1); |
1021 | } |
e03e1e7c |
1022 | if(setsockopt(sk->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 |
1023 | { |
1024 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); |
1025 | return(-1); |
1026 | } |
1027 | return(0); |
1028 | } |
b020fb3d |
1029 | if(sk->family == AF_INET6) |
1030 | { |
1031 | switch(tos) |
1032 | { |
b198bed6 |
1033 | case 0: |
1034 | buf = 0; |
b020fb3d |
1035 | case SOCK_TOS_MINCOST: |
1036 | buf = confgetint("net", "diffserv-mincost"); |
1037 | break; |
1038 | case SOCK_TOS_MAXREL: |
1039 | buf = confgetint("net", "diffserv-maxrel"); |
1040 | break; |
1041 | case SOCK_TOS_MAXTP: |
1042 | buf = confgetint("net", "diffserv-maxtp"); |
1043 | break; |
1044 | case SOCK_TOS_MINDELAY: |
1045 | buf = confgetint("net", "diffserv-mindelay"); |
1046 | break; |
1047 | default: |
1048 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
1049 | return(-1); |
1050 | } |
1051 | /* |
1052 | On Linux, the API IPv6 flow label management doesn't seem to |
1053 | be entirely complete, so I guess this will have to wait. |
1054 | |
1055 | if(setsockopt(...) < 0) |
1056 | { |
1057 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); |
1058 | return(-1); |
1059 | } |
1060 | */ |
1061 | return(0); |
1062 | } |
d3372da9 |
1063 | flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family); |
1064 | return(1); |
1065 | } |
1066 | |
1067 | struct resolvedata |
1068 | { |
1069 | int fd; |
1070 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); |
1071 | void *data; |
1072 | struct sockaddr_storage addr; |
1073 | int addrlen; |
1074 | }; |
1075 | |
1076 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) |
1077 | { |
1078 | static char buf[80]; |
1079 | int ret; |
1080 | struct sockaddr_in *ipv4; |
1081 | |
1082 | if(!status) |
1083 | { |
1084 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) |
1085 | { |
b4d16e90 |
1086 | errno = ENOENT; |
d3372da9 |
1087 | data->callback(NULL, 0, data->data); |
1088 | } else { |
1089 | ipv4 = (struct sockaddr_in *)&data->addr; |
1090 | memcpy(&ipv4->sin_addr, buf, 4); |
1091 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); |
1092 | } |
1093 | } else { |
b4d16e90 |
1094 | errno = ENOENT; |
d3372da9 |
1095 | data->callback(NULL, 0, data->data); |
1096 | } |
1097 | close(data->fd); |
1098 | free(data); |
1099 | } |
1100 | |
1101 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) |
1102 | { |
1103 | int i; |
1104 | char *p; |
1105 | int port; |
1106 | int pfd[2]; |
1107 | pid_t child; |
1108 | struct resolvedata *rdata; |
1109 | struct sockaddr_in ipv4; |
1110 | struct hostent *he; |
1111 | sigset_t sigset; |
1112 | |
1113 | /* IPv4 */ |
1114 | port = -1; |
1115 | if((p = strchr(addr, ':')) != NULL) |
1116 | { |
1117 | *p = 0; |
1118 | port = atoi(p + 1); |
1119 | } |
1120 | ipv4.sin_family = AF_INET; |
1121 | ipv4.sin_port = htons(port); |
1122 | if(inet_aton(addr, &ipv4.sin_addr)) |
1123 | { |
1124 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); |
1125 | } else { |
1126 | sigemptyset(&sigset); |
1127 | sigaddset(&sigset, SIGCHLD); |
1128 | sigprocmask(SIG_BLOCK, &sigset, NULL); |
1129 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) |
1130 | { |
1131 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1132 | return(-1); |
1133 | } |
1134 | if(child == 0) |
1135 | { |
1136 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1137 | for(i = 3; i < FD_SETSIZE; i++) |
1138 | { |
1139 | if(i != pfd[1]) |
1140 | close(i); |
1141 | } |
1142 | signal(SIGALRM, SIG_DFL); |
1143 | alarm(30); |
1144 | if((he = gethostbyname(addr)) == NULL) |
1145 | exit(1); |
1146 | write(pfd[1], he->h_addr_list[0], 4); |
1147 | exit(0); |
1148 | } else { |
1149 | close(pfd[1]); |
1150 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); |
1151 | rdata = smalloc(sizeof(*rdata)); |
1152 | rdata->fd = pfd[0]; |
1153 | rdata->callback = callback; |
1154 | rdata->data = data; |
1155 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); |
1156 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); |
1157 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
1158 | return(1); |
1159 | } |
1160 | } |
1161 | return(0); |
1162 | } |
1163 | |
1164 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1165 | { |
1166 | socklen_t len; |
1167 | struct sockaddr_storage name; |
1168 | |
1169 | *namebuf = NULL; |
1170 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
1171 | return(-1); |
1172 | len = sizeof(name); |
1173 | if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0) |
1174 | { |
6fb0c6ac |
1175 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 |
1176 | return(-1); |
1177 | } |
1178 | *namebuf = memcpy(smalloc(len), &name, len); |
b870805e |
1179 | if(lenbuf != NULL) |
1180 | *lenbuf = len; |
d3372da9 |
1181 | return(0); |
1182 | } |
1183 | |
eaa35963 |
1184 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1185 | { |
1186 | if(dst->sa_family != src->sa_family) |
1187 | { |
1188 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); |
1189 | return; |
1190 | } |
1191 | switch(src->sa_family) |
1192 | { |
1193 | case AF_INET: |
1194 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; |
1195 | break; |
1196 | case AF_INET6: |
1197 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; |
1198 | break; |
1199 | default: |
1200 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); |
1201 | break; |
1202 | } |
1203 | } |
1204 | |
1205 | static int makepublic(struct sockaddr *addr) |
d3372da9 |
1206 | { |
6fb0c6ac |
1207 | int ret; |
eaa35963 |
1208 | socklen_t plen; |
1209 | struct sockaddr *pname; |
1210 | |
1211 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) |
1212 | { |
1213 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); |
1214 | return(-1); |
1215 | } |
1216 | if(ret) |
1217 | return(0); |
1218 | sethostaddr(addr, pname); |
1219 | free(pname); |
1220 | return(0); |
1221 | } |
1222 | |
1223 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1224 | { |
d3372da9 |
1225 | socklen_t len; |
6fb0c6ac |
1226 | struct sockaddr *name; |
d3372da9 |
1227 | |
1228 | switch(confgetint("net", "mode")) |
1229 | { |
1230 | case 0: |
1231 | *namebuf = NULL; |
1232 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
d3372da9 |
1233 | { |
eaa35963 |
1234 | errno = EBADF; |
d3372da9 |
1235 | return(-1); |
1236 | } |
6fb0c6ac |
1237 | if(!sockgetlocalname(sk, &name, &len)) |
1238 | { |
1239 | *namebuf = name; |
1240 | *lenbuf = len; |
eaa35963 |
1241 | makepublic(name); |
6fb0c6ac |
1242 | return(0); |
1243 | } |
1244 | flog(LOG_ERR, "could not get remotely accessible name by any means"); |
1245 | return(-1); |
d3372da9 |
1246 | case 1: |
1247 | errno = EOPNOTSUPP; |
1248 | return(-1); |
1249 | default: |
1250 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); |
1251 | errno = EOPNOTSUPP; |
1252 | return(-1); |
1253 | } |
1254 | } |
1255 | |
d29853b1 |
1256 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1257 | { |
1258 | struct sockaddr *name1, *name2; |
1259 | socklen_t len1, len2; |
1260 | |
1261 | if(sk->family != sk2->family) |
1262 | { |
1263 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family); |
1264 | return(-1); |
1265 | } |
3804379d |
1266 | if(sockgetremotename(sk, &name1, &len1)) |
d29853b1 |
1267 | return(-1); |
3804379d |
1268 | if(sockgetremotename(sk2, &name2, &len2)) { |
d29853b1 |
1269 | free(name1); |
1270 | return(-1); |
1271 | } |
1272 | sethostaddr(name1, name2); |
1273 | free(name2); |
1274 | *namebuf = name1; |
1275 | *lenbuf = len1; |
1276 | return(0); |
1277 | } |
1278 | |
99a28d47 |
1279 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1280 | { |
1281 | struct sockaddr_un *u1, *u2; |
1282 | struct sockaddr_in *n1, *n2; |
1283 | #ifdef HAVE_IPV6 |
1284 | struct sockaddr_in6 *s1, *s2; |
1285 | #endif |
1286 | |
1287 | if(x->sa_family != y->sa_family) |
1288 | return(0); |
1289 | switch(x->sa_family) { |
1290 | case AF_UNIX: |
1291 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; |
1292 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) |
1293 | return(0); |
1294 | break; |
1295 | case AF_INET: |
1296 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; |
1297 | if(n1->sin_port != n2->sin_port) |
1298 | return(0); |
1299 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) |
1300 | return(0); |
1301 | break; |
c8a729d7 |
1302 | #ifdef HAVE_IPV6 |
99a28d47 |
1303 | case AF_INET6: |
1304 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; |
1305 | if(s1->sin6_port != s2->sin6_port) |
1306 | return(0); |
1307 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) |
1308 | return(0); |
1309 | break; |
c8a729d7 |
1310 | #endif |
99a28d47 |
1311 | } |
1312 | return(1); |
1313 | } |
1314 | |
d3372da9 |
1315 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1316 | { |
d3372da9 |
1317 | struct sockaddr_in *ipv4; |
1318 | #ifdef HAVE_IPV6 |
1319 | struct sockaddr_in6 *ipv6; |
1320 | #endif |
1321 | static char *ret = NULL; |
1322 | char buf[1024]; |
1323 | |
1324 | if(ret != NULL) |
1325 | free(ret); |
1326 | ret = NULL; |
1327 | switch(arg->sa_family) |
1328 | { |
1329 | case AF_UNIX: |
6a97462e |
1330 | ret = sstrdup("Unix socket"); |
d3372da9 |
1331 | break; |
1332 | case AF_INET: |
1333 | ipv4 = (struct sockaddr_in *)arg; |
1334 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) |
1335 | return(NULL); |
1336 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); |
1337 | break; |
1338 | #ifdef HAVE_IPV6 |
1339 | case AF_INET6: |
1340 | ipv6 = (struct sockaddr_in6 *)arg; |
1341 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) |
1342 | return(NULL); |
fc7f7735 |
1343 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 |
1344 | break; |
1345 | #endif |
1346 | default: |
1347 | errno = EPFNOSUPPORT; |
1348 | break; |
1349 | } |
1350 | return(ret); |
1351 | } |
1352 | |
1353 | #if 0 |
1354 | |
1355 | /* |
1356 | * It was very nice to use this, but it seems |
1357 | * to mess things up, so I guess it has to go... :-( |
1358 | */ |
1359 | |
1360 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) |
1361 | { |
1362 | struct sockaddr *arg; |
1363 | socklen_t arglen; |
1364 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with |
1365 | * lowercase letters to 1, so I do this |
1366 | * instead. */ |
1367 | struct sockaddr_in *ipv4; |
1368 | int ret; |
1369 | |
1370 | arg = *(struct sockaddr **)(args[0]); |
1371 | arglen = *(socklen_t *)(args[1]); |
1372 | switch(arg->sa_family) |
1373 | { |
1374 | case AF_UNIX: |
1375 | UNIX = (struct sockaddr_un *)arg; |
1376 | ret = fprintf(stream, "%s", UNIX->sun_path); |
1377 | break; |
1378 | case AF_INET: |
1379 | ipv4 = (struct sockaddr_in *)arg; |
1380 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); |
1381 | break; |
1382 | default: |
1383 | ret = -1; |
1384 | errno = EPFNOSUPPORT; |
1385 | break; |
1386 | } |
1387 | return(ret); |
1388 | } |
1389 | |
1390 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) |
1391 | { |
1392 | if(n > 0) |
1393 | argtypes[0] = PA_POINTER; |
1394 | if(n > 1) |
1395 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ |
1396 | * be an int, so I guess this should be |
1397 | * safe. */ |
1398 | return(2); |
1399 | } |
1400 | #endif |
1401 | |
1402 | static int init(int hup) |
1403 | { |
1404 | if(!hup) |
1405 | { |
1406 | /* |
1407 | if(register_printf_function('N', formataddress, formataddress_arginfo)) |
1408 | { |
1409 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); |
1410 | return(1); |
1411 | } |
1412 | */ |
1413 | } |
1414 | return(0); |
1415 | } |
1416 | |
1417 | static void terminate(void) |
1418 | { |
1419 | while(sockets != NULL) |
1420 | unlinksock(sockets); |
1421 | } |
1422 | |
1423 | static struct module me = |
1424 | { |
1425 | .name = "net", |
1426 | .conf = |
1427 | { |
1428 | .vars = myvars |
1429 | }, |
1430 | .init = init, |
1431 | .terminate = terminate |
1432 | }; |
1433 | |
1434 | MODULE(me) |