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