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Use swcsdup instead of wcsdup.
[doldaconnect.git] / daemon / net.c
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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
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 */
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
509static 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
548void 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
566void 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
597size_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
616size_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 */
639static 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 666struct 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 700struct 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 713struct 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 742struct 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
764struct 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
782void 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 790struct 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 821static 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 839int 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
993int 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
1067struct 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
1076static 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 {
1086 errno = ENONET;
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 {
1094 errno = ENONET;
1095 data->callback(NULL, 0, data->data);
1096 }
1097 close(data->fd);
1098 free(data);
1099}
1100
1101int 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
1164int 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 1184static 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
1205static 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
1223int 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 1256int 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 1279int 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 1315char *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
1360static 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
1390static 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
1402static 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
1417static void terminate(void)
1418{
1419 while(sockets != NULL)
1420 unlinksock(sockets);
1421}
1422
1423static struct module me =
1424{
1425 .name = "net",
1426 .conf =
1427 {
1428 .vars = myvars
1429 },
1430 .init = init,
1431 .terminate = terminate
1432};
1433
1434MODULE(me)
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