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