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