Dolda2000 GitWeb / doldaconnect.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Made the updatehmlist implementation buffered using stdio.
[doldaconnect.git] / daemon / net.c
CommitLineData
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
50static 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
90static struct socket *sockets = NULL;
91int numsocks = 0;
92
93/* XXX: Get autoconf for all this... */
94int 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
170static 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
217static 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
234struct 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
246static 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
258void getsock(struct socket *sk)
259{
260 sk->refcount++;
261}
262
263void 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 301void 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 318void *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 351static 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 372static 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 */
dcf7a1a2
FT		 391 if(sk->isrealsocket) {
392 if(ioctl(sk->fd, SIOCINQ, &inq))
393 {
394 /* I don't really know what could go wrong here, so let's
395 * assume it's transient. */
396 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
397 inq = 2048;
398 }
399 } else {
400 /* There are perils when trying to use SIOCINQ on files >2GiB... */
401 inq = 65536;
d3372da9 402 }
403#else
404 inq = 2048;
405#endif
406 if(inq > 65536)
407 inq = 65536;
408 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
987518f8 409 if(sk->isrealsocket)
410 {
411 bufvec.iov_base = sk->inbuf.s.buf + sk->inbuf.s.datasize;
412 bufvec.iov_len = inq;
413 ret = recvmsg(sk->fd, &msg, 0);
414 } else {
415 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
416 msg.msg_controllen = 0;
417 msg.msg_flags = 0;
418 }
d3372da9 419 if(ret < 0)
420 {
421 if((errno == EINTR) || (errno == EAGAIN))
422 return;
cab0b442 423 if(sk->errcb != NULL)
424 sk->errcb(sk, errno, sk->data);
d3372da9 425 closesock(sk);
426 return;
427 }
9e5f2b29 428 if(msg.msg_flags & MSG_CTRUNC)
429 flog(LOG_DEBUG, "ancillary data was truncated");
430 else
431 recvcmsg(sk, &msg);
d3372da9 432 if(ret == 0)
433 {
cab0b442 434 if(sk->errcb != NULL)
435 sk->errcb(sk, 0, sk->data);
d3372da9 436 closesock(sk);
437 return;
438 }
439 sk->inbuf.s.datasize += ret;
cab0b442 440 if(sk->readcb != NULL)
441 sk->readcb(sk, sk->data);
d3372da9 442 break;
443 case SOCK_DGRAM:
9e5f2b29 444#if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
d3372da9 445 if(ioctl(sk->fd, SIOCINQ, &inq))
446 {
447 /* I don't really know what could go wrong here, so let's
448 * assume it's transient. */
449 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
450 return;
451 }
9e5f2b29 452#else
453 inq = 65536;
454#endif
d3372da9 455 dbuf = smalloc(sizeof(*dbuf));
456 dbuf->data = smalloc(inq);
457 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
9e5f2b29 458 /*
d3372da9 459 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
9e5f2b29 460 */
461 msg.msg_name = dbuf->addr;
462 msg.msg_namelen = dbuf->addrlen;
463 bufvec.iov_base = dbuf->data;
464 bufvec.iov_len = inq;
465 ret = recvmsg(sk->fd, &msg, 0);
466 dbuf->addrlen = msg.msg_namelen;
d3372da9 467 if(ret < 0)
468 {
469 free(dbuf->addr);
470 free(dbuf->data);
471 free(dbuf);
472 if((errno == EINTR) || (errno == EAGAIN))
473 return;
cab0b442 474 if(sk->errcb != NULL)
475 sk->errcb(sk, errno, sk->data);
d3372da9 476 closesock(sk);
477 return;
478 }
9e5f2b29 479 if(msg.msg_flags & MSG_CTRUNC)
480 flog(LOG_DEBUG, "ancillary data was truncated");
481 else
482 recvcmsg(sk, &msg);
d3372da9 483 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
484 * have EOF), but rather an empty packet. I don't know if any
485 * other potential DGRAM protocols might have an EOF
486 * condition, so let's play safe. */
487 if(ret == 0)
488 {
489 free(dbuf->addr);
490 free(dbuf->data);
491 free(dbuf);
492 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
493 {
cab0b442 494 if(sk->errcb != NULL)
495 sk->errcb(sk, 0, sk->data);
d3372da9 496 closesock(sk);
497 }
498 return;
499 }
500 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
501 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
502 dbuf->next = NULL;
503 if(sk->inbuf.d.l != NULL)
504 sk->inbuf.d.l->next = dbuf;
505 else
506 sk->inbuf.d.f = dbuf;
507 sk->inbuf.d.l = dbuf;
cab0b442 508 if(sk->readcb != NULL)
509 sk->readcb(sk, sk->data);
d3372da9 510 break;
511 }
512}
513
514static void sockflush(struct socket *sk)
515{
516 int ret;
517 struct dgrambuf *dbuf;
518
519 switch(sk->type)
520 {
521 case SOCK_STREAM:
522 if(sk->isrealsocket)
523 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
524 else
525 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
526 if(ret < 0)
527 {
528 /* For now, assume transient error, since
529 * the socket is polled for errors */
530 break;
531 }
532 if(ret > 0)
533 {
534 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
cab0b442 535 if(sk->writecb != NULL)
536 sk->writecb(sk, sk->data);
d3372da9 537 }
538 break;
539 case SOCK_DGRAM:
540 dbuf = sk->outbuf.d.f;
541 if((sk->outbuf.d.f = dbuf->next) == NULL)
542 sk->outbuf.d.l = NULL;
543 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
544 free(dbuf->data);
545 free(dbuf->addr);
546 free(dbuf);
cab0b442 547 if(sk->writecb != NULL)
548 sk->writecb(sk, sk->data);
d3372da9 549 break;
550 }
551}
552
553void closesock(struct socket *sk)
554{
b870805e 555 struct sockaddr_un *un;
556
e0cbc756 557 if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX))
b870805e 558 {
7ab36fbd 559 if((sk->state == SOCK_LST) && strchr(un->sun_path, '/'))
b870805e 560 {
561 if(unlink(un->sun_path))
7ab36fbd 562 flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno));
b870805e 563 }
564 }
d3372da9 565 sk->state = SOCK_STL;
566 close(sk->fd);
567 sk->fd = -1;
568 sk->close = 0;
569}
570
571void sockqueue(struct socket *sk, void *data, size_t size)
572{
573 struct dgrambuf *new;
574
575 if(sk->state == SOCK_STL)
576 return;
577 switch(sk->type)
578 {
579 case SOCK_STREAM:
580 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
581 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
582 sk->outbuf.s.datasize += size;
583 break;
584 case SOCK_DGRAM:
585 if(sk->remote == NULL)
586 return;
587 new = smalloc(sizeof(*new));
588 new->next = NULL;
589 memcpy(new->data = smalloc(size), data, new->size = size);
590 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
591 if(sk->outbuf.d.l == NULL)
592 {
593 sk->outbuf.d.l = sk->outbuf.d.f = new;
594 } else {
595 sk->outbuf.d.l->next = new;
596 sk->outbuf.d.l = new;
597 }
598 break;
599 }
600}
601
602size_t sockgetdatalen(struct socket *sk)
603{
604 struct dgrambuf *b;
605 size_t ret;
606
607 switch(sk->type)
608 {
609 case SOCK_STREAM:
610 ret = sk->inbuf.s.datasize;
611 break;
612 case SOCK_DGRAM:
613 ret = 0;
614 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
615 ret += b->size;
616 break;
617 }
618 return(ret);
619}
620
621size_t sockqueuesize(struct socket *sk)
622{
623 struct dgrambuf *b;
624 size_t ret;
625
626 switch(sk->type)
627 {
628 case SOCK_STREAM:
629 ret = sk->outbuf.s.datasize;
630 break;
631 case SOCK_DGRAM:
632 ret = 0;
633 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
634 ret += b->size;
635 break;
636 }
637 return(ret);
638}
639
d3372da9 640/*
7ab36fbd 641 * Seriously, I don't know if it's naughty or not to remove
642 * pre-existing Unix sockets.
643 */
644static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen)
645{
646 struct sockaddr_un *un;
647 struct stat sb;
648
649 if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX))
650 return(-1);
651 un = (struct sockaddr_un *)name;
652 if(stat(un->sun_path, &sb))
653 return(-1);
654 if(!S_ISSOCK(sb.st_mode))
655 return(-1);
656 if(unlink(un->sun_path))
657 return(-1);
658 if(bind(sk->fd, name, namelen) < 0)
659 return(-1);
660 return(0);
661}
662
663/*
d3372da9 664 * The difference between netcslisten() and netcslistenlocal() is that
665 * netcslistenlocal() always listens on the local host, instead of
666 * following proxy/passive mode directions. It is suitable for eg. the
667 * UI channel, while the file sharing networks should, naturally, use
668 * netcslisten() instead.
669*/
670
cab0b442 671struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
d3372da9 672{
673 struct socket *sk;
66c517d2 674 int intbuf;
d3372da9 675
676 /* I don't know if this is actually correct (it probably isn't),
677 * but since, at on least Linux systems, PF_* are specifically
678 * #define'd to their AF_* counterparts, it allows for a severely
679 * smoother implementation. If it breaks something on your
680 * platform, please tell me so.
681 */
682 if((sk = mksock(name->sa_family, type)) == NULL)
683 return(NULL);
684 sk->state = SOCK_LST;
687b2ee2 685 if(confgetint("net", "reuseaddr"))
686 {
687 intbuf = 1;
688 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
689 }
7ab36fbd 690 if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0)))
d3372da9 691 {
692 putsock(sk);
693 return(NULL);
694 }
695 if(listen(sk->fd, 16) < 0)
696 {
697 putsock(sk);
698 return(NULL);
699 }
cab0b442 700 sk->acceptcb = func;
701 sk->data = data;
d3372da9 702 return(sk);
703}
704
cab0b442 705struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
c23acc61 706{
707 if(confgetint("net", "mode") == 1)
708 {
709 errno = EOPNOTSUPP;
710 return(NULL);
711 }
c23acc61 712 if(confgetint("net", "mode") == 0)
713 return(netcslistenlocal(type, name, namelen, func, data));
714 errno = EOPNOTSUPP;
715 return(NULL);
716}
717
cab0b442 718struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
0a1bc5b1 719{
720 struct sockaddr_in addr;
721#ifdef HAVE_IPV6
722 struct sockaddr_in6 addr6;
723#endif
cab0b442 724 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
0a1bc5b1 725 struct socket *ret;
726
727 if(local)
728 csfunc = netcslistenlocal;
729 else
730 csfunc = netcslisten;
731#ifdef HAVE_IPV6
732 memset(&addr6, 0, sizeof(addr6));
733 addr6.sin6_family = AF_INET6;
734 addr6.sin6_port = htons(port);
735 addr6.sin6_addr = in6addr_any;
736 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
737 return(ret);
738 if((ret == NULL) && (errno != EAFNOSUPPORT))
739 return(NULL);
740#endif
741 memset(&addr, 0, sizeof(addr));
742 addr.sin_family = AF_INET;
743 addr.sin_port = htons(port);
744 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
745}
746
d3372da9 747struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
748{
749 struct socket *sk;
750 int mode;
751
752 mode = confgetint("net", "mode");
753 if((mode == 0) || (mode == 1))
754 {
755 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
756 return(NULL);
757 if(bind(sk->fd, name, namelen) < 0)
758 {
759 putsock(sk);
760 return(NULL);
761 }
762 sk->state = SOCK_EST;
763 return(sk);
764 }
765 errno = EOPNOTSUPP;
766 return(NULL);
767}
768
769struct socket *netdupsock(struct socket *sk)
770{
771 struct socket *newsk;
772
773 newsk = newsock(sk->type);
774 if((newsk->fd = dup(sk->fd)) < 0)
775 {
776 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
777 putsock(newsk);
778 return(NULL);
779 }
780 newsk->state = sk->state;
781 newsk->ignread = sk->ignread;
782 if(sk->remote != NULL)
783 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
784 return(newsk);
785}
786
787void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
788{
789 if(sk->remote != NULL)
790 free(sk->remote);
791 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
792 sk->ignread = 1;
793}
794
cab0b442 795struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
d3372da9 796{
797 struct socket *sk;
798 int mode;
799
800 mode = confgetint("net", "mode");
801 if((mode == 0) || (mode == 1))
802 {
803 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
804 return(NULL);
805 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
806 if(!connect(sk->fd, addr, addrlen))
807 {
808 sk->state = SOCK_EST;
809 func(sk, 0, data);
810 return(sk);
811 }
812 if(errno == EINPROGRESS)
813 {
814 sk->state = SOCK_SYN;
cab0b442 815 sk->conncb = func;
816 sk->data = data;
d3372da9 817 return(sk);
818 }
819 putsock(sk);
820 return(NULL);
821 }
822 errno = EOPNOTSUPP;
823 return(NULL);
824}
825
9e5f2b29 826static void acceptunix(struct socket *sk)
827{
828 int buf;
829
830 buf = 1;
a8c5ada6 831#if UNIX_AUTH_STYLE == 1
9e5f2b29 832 if(setsockopt(sk->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0)
833 flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", sk->fd, strerror(errno));
a8c5ada6 834#elif UNIX_AUTH_STYLE == 2
835 if(getpeereid(sk->fd, &sk->ucred.uid, &sk->ucred.gid) < 0)
836 {
837 flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", sk->fd, strerror(errno));
838 sk->ucred.uid = -1;
839 sk->ucred.gid = -1;
840 }
841#endif
9e5f2b29 842}
843
d3372da9 844int pollsocks(int timeout)
845{
eaa35963 846 int i, num, ret;
847 socklen_t retlen;
d3372da9 848 int newfd;
849 struct pollfd *pfds;
850 struct socket *sk, *next, *newsk;
851 struct sockaddr_storage ss;
852 socklen_t sslen;
853
854 pfds = smalloc(sizeof(*pfds) * (num = numsocks));
855 for(i = 0, sk = sockets; i < num; sk = sk->next)
856 {
857 if(sk->state == SOCK_STL)
858 {
859 num--;
860 continue;
861 }
862 pfds[i].fd = sk->fd;
863 pfds[i].events = 0;
864 if(!sk->ignread)
865 pfds[i].events |= POLLIN;
866 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
867 pfds[i].events |= POLLOUT;
868 pfds[i].revents = 0;
869 i++;
870 }
871 ret = poll(pfds, num, timeout);
872 if(ret < 0)
873 {
874 if(errno != EINTR)
875 {
876 flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno));
877 /* To avoid CPU hogging in case it's bad, which it
878 * probably is. */
879 sleep(1);
880 }
881 free(pfds);
882 return(1);
883 }
884 for(sk = sockets; sk != NULL; sk = next)
885 {
886 next = sk->next;
887 for(i = 0; i < num; i++)
888 {
889 if(pfds[i].fd == sk->fd)
890 break;
891 }
892 if(i == num)
893 continue;
894 switch(sk->state)
895 {
896 case SOCK_LST:
897 if(pfds[i].revents & POLLIN)
898 {
899 sslen = sizeof(ss);
900 if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0)
cab0b442 901 {
902 if(sk->errcb != NULL)
903 sk->errcb(sk, errno, sk->data);
904 }
d3372da9 905 newsk = newsock(sk->type);
906 newsk->fd = newfd;
907 newsk->family = sk->family;
908 newsk->state = SOCK_EST;
909 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
910 newsk->remotelen = sslen;
9e5f2b29 911 if(ss.ss_family == PF_UNIX)
912 acceptunix(newsk);
cab0b442 913 if(sk->acceptcb != NULL)
914 sk->acceptcb(sk, newsk, sk->data);
9e5f2b29 915 putsock(newsk);
d3372da9 916 }
917 if(pfds[i].revents & POLLERR)
918 {
919 retlen = sizeof(ret);
920 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
cab0b442 921 if(sk->errcb != NULL)
922 sk->errcb(sk, ret, sk->data);
d3372da9 923 continue;
924 }
925 break;
926 case SOCK_SYN:
927 if(pfds[i].revents & POLLERR)
928 {
929 retlen = sizeof(ret);
930 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
cab0b442 931 if(sk->conncb != NULL)
932 sk->conncb(sk, ret, sk->data);
d3372da9 933 closesock(sk);
934 continue;
935 }
936 if(pfds[i].revents & (POLLIN | POLLOUT))
937 {
938 sk->state = SOCK_EST;
cab0b442 939 if(sk->conncb != NULL)
940 sk->conncb(sk, 0, sk->data);
d3372da9 941 }
942 break;
943 case SOCK_EST:
944 if(pfds[i].revents & POLLERR)
945 {
946 retlen = sizeof(ret);
947 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
cab0b442 948 if(sk->errcb != NULL)
949 sk->errcb(sk, ret, sk->data);
d3372da9 950 closesock(sk);
951 continue;
952 }
953 if(pfds[i].revents & POLLIN)
954 sockrecv(sk);
955 if(pfds[i].revents & POLLOUT)
956 {
957 if(sockqueuesize(sk) > 0)
958 sockflush(sk);
959 }
960 break;
961 }
962 if(pfds[i].revents & POLLNVAL)
963 {
964 flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd);
965 sk->state = SOCK_STL;
966 unlinksock(sk);
967 continue;
968 }
969 if(pfds[i].revents & POLLHUP)
970 {
cab0b442 971 if(sk->errcb != NULL)
972 sk->errcb(sk, 0, sk->data);
d3372da9 973 closesock(sk);
974 unlinksock(sk);
975 continue;
976 }
977 }
978 free(pfds);
979 for(sk = sockets; sk != NULL; sk = next)
980 {
981 next = sk->next;
982 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
983 {
984 unlinksock(sk);
985 continue;
986 }
987 if(sk->close && (sockqueuesize(sk) == 0))
988 closesock(sk);
989 if(sk->state == SOCK_STL)
990 {
991 unlinksock(sk);
992 continue;
993 }
994 }
995 return(1);
996}
997
998int socksettos(struct socket *sk, int tos)
999{
b020fb3d 1000 int buf;
1001
7ab36fbd 1002 if(sk->family == AF_UNIX)
1003 return(0); /* Unix sockets are always perfect. :) */
d3372da9 1004 if(sk->family == AF_INET)
1005 {
b020fb3d 1006 switch(tos)
1007 {
b198bed6 1008 case 0:
1009 buf = 0;
1010 break;
b020fb3d 1011 case SOCK_TOS_MINCOST:
18c1ae1d 1012 buf = 0x02;
b020fb3d 1013 break;
1014 case SOCK_TOS_MAXREL:
18c1ae1d 1015 buf = 0x04;
b020fb3d 1016 break;
1017 case SOCK_TOS_MAXTP:
18c1ae1d 1018 buf = 0x08;
b020fb3d 1019 break;
1020 case SOCK_TOS_MINDELAY:
18c1ae1d 1021 buf = 0x10;
b020fb3d 1022 break;
1023 default:
1024 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
1025 return(-1);
1026 }
e03e1e7c 1027 if(setsockopt(sk->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0)
d3372da9 1028 {
1029 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
1030 return(-1);
1031 }
1032 return(0);
1033 }
b020fb3d 1034 if(sk->family == AF_INET6)
1035 {
1036 switch(tos)
1037 {
b198bed6 1038 case 0:
1039 buf = 0;
b020fb3d 1040 case SOCK_TOS_MINCOST:
1041 buf = confgetint("net", "diffserv-mincost");
1042 break;
1043 case SOCK_TOS_MAXREL:
1044 buf = confgetint("net", "diffserv-maxrel");
1045 break;
1046 case SOCK_TOS_MAXTP:
1047 buf = confgetint("net", "diffserv-maxtp");
1048 break;
1049 case SOCK_TOS_MINDELAY:
1050 buf = confgetint("net", "diffserv-mindelay");
1051 break;
1052 default:
1053 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
1054 return(-1);
1055 }
1056 /*
1057 On Linux, the API IPv6 flow label management doesn't seem to
1058 be entirely complete, so I guess this will have to wait.
1059
1060 if(setsockopt(...) < 0)
1061 {
1062 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
1063 return(-1);
1064 }
1065 */
1066 return(0);
1067 }
d3372da9 1068 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
1069 return(1);
1070}
1071
1072struct resolvedata
1073{
1074 int fd;
1075 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
1076 void *data;
1077 struct sockaddr_storage addr;
1078 int addrlen;
1079};
1080
1081static void resolvecb(pid_t pid, int status, struct resolvedata *data)
1082{
1083 static char buf[80];
1084 int ret;
1085 struct sockaddr_in *ipv4;
1086
1087 if(!status)
1088 {
1089 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
1090 {
b4d16e90 1091 errno = ENOENT;
d3372da9 1092 data->callback(NULL, 0, data->data);
1093 } else {
1094 ipv4 = (struct sockaddr_in *)&data->addr;
1095 memcpy(&ipv4->sin_addr, buf, 4);
1096 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
1097 }
1098 } else {
b4d16e90 1099 errno = ENOENT;
d3372da9 1100 data->callback(NULL, 0, data->data);
1101 }
1102 close(data->fd);
1103 free(data);
1104}
1105
1106int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
1107{
1108 int i;
1109 char *p;
1110 int port;
1111 int pfd[2];
1112 pid_t child;
1113 struct resolvedata *rdata;
1114 struct sockaddr_in ipv4;
1115 struct hostent *he;
1116 sigset_t sigset;
1117
1118 /* IPv4 */
1119 port = -1;
1120 if((p = strchr(addr, ':')) != NULL)
1121 {
1122 *p = 0;
1123 port = atoi(p + 1);
1124 }
1125 ipv4.sin_family = AF_INET;
1126 ipv4.sin_port = htons(port);
1127 if(inet_aton(addr, &ipv4.sin_addr))
1128 {
1129 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
1130 } else {
1131 sigemptyset(&sigset);
1132 sigaddset(&sigset, SIGCHLD);
1133 sigprocmask(SIG_BLOCK, &sigset, NULL);
1134 if((pipe(pfd) < 0) || ((child = fork()) < 0))
1135 {
1136 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1137 return(-1);
1138 }
1139 if(child == 0)
1140 {
1141 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1142 for(i = 3; i < FD_SETSIZE; i++)
1143 {
1144 if(i != pfd[1])
1145 close(i);
1146 }
1147 signal(SIGALRM, SIG_DFL);
1148 alarm(30);
1149 if((he = gethostbyname(addr)) == NULL)
1150 exit(1);
1151 write(pfd[1], he->h_addr_list[0], 4);
1152 exit(0);
1153 } else {
1154 close(pfd[1]);
1155 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1156 rdata = smalloc(sizeof(*rdata));
1157 rdata->fd = pfd[0];
1158 rdata->callback = callback;
1159 rdata->data = data;
1160 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1161 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1162 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1163 return(1);
1164 }
1165 }
1166 return(0);
1167}
1168
1169int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1170{
1171 socklen_t len;
1172 struct sockaddr_storage name;
1173
1174 *namebuf = NULL;
1175 if((sk->state == SOCK_STL) || (sk->fd < 0))
1176 return(-1);
1177 len = sizeof(name);
1178 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1179 {
6fb0c6ac 1180 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno));
d3372da9 1181 return(-1);
1182 }
1183 *namebuf = memcpy(smalloc(len), &name, len);
b870805e 1184 if(lenbuf != NULL)
1185 *lenbuf = len;
d3372da9 1186 return(0);
1187}
1188
eaa35963 1189static void sethostaddr(struct sockaddr *dst, struct sockaddr *src)
1190{
1191 if(dst->sa_family != src->sa_family)
1192 {
1193 flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family);
1194 return;
1195 }
1196 switch(src->sa_family)
1197 {
1198 case AF_INET:
1199 ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr;
1200 break;
1201 case AF_INET6:
1202 ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr;
1203 break;
1204 default:
1205 flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family);
1206 break;
1207 }
1208}
1209
1210static int makepublic(struct sockaddr *addr)
d3372da9 1211{
6fb0c6ac 1212 int ret;
eaa35963 1213 socklen_t plen;
1214 struct sockaddr *pname;
1215
1216 if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0)
1217 {
1218 flog(LOG_ERR, "could not get public address: %s", strerror(errno));
1219 return(-1);
1220 }
1221 if(ret)
1222 return(0);
1223 sethostaddr(addr, pname);
1224 free(pname);
1225 return(0);
1226}
1227
1228int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1229{
d3372da9 1230 socklen_t len;
6fb0c6ac 1231 struct sockaddr *name;
d3372da9 1232
1233 switch(confgetint("net", "mode"))
1234 {
1235 case 0:
1236 *namebuf = NULL;
1237 if((sk->state == SOCK_STL) || (sk->fd < 0))
d3372da9 1238 {
eaa35963 1239 errno = EBADF;
d3372da9 1240 return(-1);
1241 }
6fb0c6ac 1242 if(!sockgetlocalname(sk, &name, &len))
1243 {
1244 *namebuf = name;
1245 *lenbuf = len;
eaa35963 1246 makepublic(name);
6fb0c6ac 1247 return(0);
1248 }
1249 flog(LOG_ERR, "could not get remotely accessible name by any means");
1250 return(-1);
d3372da9 1251 case 1:
1252 errno = EOPNOTSUPP;
1253 return(-1);
1254 default:
1255 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1256 errno = EOPNOTSUPP;
1257 return(-1);
1258 }
1259}
1260
d29853b1 1261int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf)
1262{
1263 struct sockaddr *name1, *name2;
1264 socklen_t len1, len2;
1265
1266 if(sk->family != sk2->family)
1267 {
1268 flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family);
1269 return(-1);
1270 }
3804379d 1271 if(sockgetremotename(sk, &name1, &len1))
d29853b1 1272 return(-1);
3804379d 1273 if(sockgetremotename(sk2, &name2, &len2)) {
d29853b1 1274 free(name1);
1275 return(-1);
1276 }
1277 sethostaddr(name1, name2);
1278 free(name2);
1279 *namebuf = name1;
1280 *lenbuf = len1;
1281 return(0);
1282}
1283
99a28d47 1284int addreq(struct sockaddr *x, struct sockaddr *y)
1285{
1286 struct sockaddr_un *u1, *u2;
1287 struct sockaddr_in *n1, *n2;
1288#ifdef HAVE_IPV6
1289 struct sockaddr_in6 *s1, *s2;
1290#endif
1291
1292 if(x->sa_family != y->sa_family)
1293 return(0);
1294 switch(x->sa_family) {
1295 case AF_UNIX:
1296 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1297 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1298 return(0);
1299 break;
1300 case AF_INET:
1301 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1302 if(n1->sin_port != n2->sin_port)
1303 return(0);
1304 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1305 return(0);
1306 break;
c8a729d7 1307#ifdef HAVE_IPV6
99a28d47 1308 case AF_INET6:
1309 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1310 if(s1->sin6_port != s2->sin6_port)
1311 return(0);
1312 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1313 return(0);
1314 break;
c8a729d7 1315#endif
99a28d47 1316 }
1317 return(1);
1318}
1319
d3372da9 1320char *formataddress(struct sockaddr *arg, socklen_t arglen)
1321{
d3372da9 1322 struct sockaddr_in *ipv4;
1323#ifdef HAVE_IPV6
1324 struct sockaddr_in6 *ipv6;
1325#endif
1326 static char *ret = NULL;
1327 char buf[1024];
1328
1329 if(ret != NULL)
1330 free(ret);
1331 ret = NULL;
1332 switch(arg->sa_family)
1333 {
1334 case AF_UNIX:
6a97462e 1335 ret = sstrdup("Unix socket");
d3372da9 1336 break;
1337 case AF_INET:
1338 ipv4 = (struct sockaddr_in *)arg;
1339 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1340 return(NULL);
1341 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1342 break;
1343#ifdef HAVE_IPV6
1344 case AF_INET6:
1345 ipv6 = (struct sockaddr_in6 *)arg;
1346 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1347 return(NULL);
fc7f7735 1348 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
d3372da9 1349 break;
1350#endif
1351 default:
1352 errno = EPFNOSUPPORT;
1353 break;
1354 }
1355 return(ret);
1356}
1357
1358#if 0
1359
1360/*
1361 * It was very nice to use this, but it seems
1362 * to mess things up, so I guess it has to go... :-(
1363 */
1364
1365static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1366{
1367 struct sockaddr *arg;
1368 socklen_t arglen;
1369 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1370 * lowercase letters to 1, so I do this
1371 * instead. */
1372 struct sockaddr_in *ipv4;
1373 int ret;
1374
1375 arg = *(struct sockaddr **)(args[0]);
1376 arglen = *(socklen_t *)(args[1]);
1377 switch(arg->sa_family)
1378 {
1379 case AF_UNIX:
1380 UNIX = (struct sockaddr_un *)arg;
1381 ret = fprintf(stream, "%s", UNIX->sun_path);
1382 break;
1383 case AF_INET:
1384 ipv4 = (struct sockaddr_in *)arg;
1385 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1386 break;
1387 default:
1388 ret = -1;
1389 errno = EPFNOSUPPORT;
1390 break;
1391 }
1392 return(ret);
1393}
1394
1395static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1396{
1397 if(n > 0)
1398 argtypes[0] = PA_POINTER;
1399 if(n > 1)
1400 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1401 * be an int, so I guess this should be
1402 * safe. */
1403 return(2);
1404}
1405#endif
1406
1407static int init(int hup)
1408{
1409 if(!hup)
1410 {
1411 /*
1412 if(register_printf_function('N', formataddress, formataddress_arginfo))
1413 {
1414 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1415 return(1);
1416 }
1417 */
1418 }
1419 return(0);
1420}
1421
1422static void terminate(void)
1423{
1424 while(sockets != NULL)
1425 unlinksock(sockets);
1426}
1427
1428static struct module me =
1429{
1430 .name = "net",
1431 .conf =
1432 {
1433 .vars = myvars
1434 },
1435 .init = init,
1436 .terminate = terminate
1437};
1438
1439MODULE(me)
Dolda Connect