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Detect errors when writing to sockets.
[doldaconnect.git] / daemon / net.c
CommitLineData
d3372da9 1/*
2 * Dolda Connect - Modular multiuser Direct Connect-style client
302a2600 3 * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com>
d3372da9 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18*/
19/* XXX: Implement SOCKS proxyability */
20
21#ifdef HAVE_CONFIG_H
22#include <config.h>
23#endif
24#include <string.h>
25#include <stdlib.h>
26#include <unistd.h>
27#include <fcntl.h>
28#include <sys/ioctl.h>
29#include <sys/socket.h>
30#include <sys/un.h>
72a7835e 31#include <sys/select.h>
d3372da9 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));
c7ff7e93 175 memset(new, 0, sizeof(*new));
d3372da9 176 new->refcount = 2;
177 new->fd = -1;
178 new->isrealsocket = 1;
179 new->family = -1;
180 new->tos = 0;
181 new->type = type;
182 new->state = -1;
183 new->ignread = 0;
184 new->close = 0;
185 new->remote = NULL;
186 new->remotelen = 0;
a8c5ada6 187 new->ucred.uid = -1;
188 new->ucred.gid = -1;
d3372da9 189 switch(type)
190 {
191 case SOCK_STREAM:
192 new->outbuf.s.buf = NULL;
193 new->outbuf.s.bufsize = 0;
194 new->outbuf.s.datasize = 0;
195 new->inbuf.s.buf = NULL;
196 new->inbuf.s.bufsize = 0;
197 new->inbuf.s.datasize = 0;
198 break;
199 case SOCK_DGRAM:
200 new->outbuf.d.f = new->outbuf.d.l = NULL;
201 new->inbuf.d.f = new->inbuf.d.l = NULL;
202 break;
203 }
cab0b442 204 new->conncb = NULL;
205 new->errcb = NULL;
206 new->readcb = NULL;
207 new->writecb = NULL;
208 new->acceptcb = NULL;
d3372da9 209 new->next = sockets;
210 new->prev = NULL;
211 if(sockets != NULL)
212 sockets->prev = new;
213 sockets = new;
214 numsocks++;
215 return(new);
216}
217
218static struct socket *mksock(int domain, int type)
219{
220 int fd;
221 struct socket *new;
222
223 if((fd = socket(domain, type, 0)) < 0)
224 {
225 flog(LOG_CRIT, "could not create socket: %s", strerror(errno));
226 return(NULL);
227 }
228 new = newsock(type);
229 new->fd = fd;
230 new->family = domain;
231 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
232 return(new);
233}
234
235struct socket *wrapsock(int fd)
236{
237 struct socket *new;
238
239 new = newsock(SOCK_STREAM);
240 new->fd = fd;
241 new->state = SOCK_EST;
242 new->isrealsocket = 0;
243 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
244 return(new);
245}
246
247static void unlinksock(struct socket *sk)
248{
249 if(sk->prev != NULL)
250 sk->prev->next = sk->next;
251 if(sk->next != NULL)
252 sk->next->prev = sk->prev;
253 if(sk == sockets)
254 sockets = sk->next;
255 putsock(sk);
256 numsocks--;
257}
258
259void getsock(struct socket *sk)
260{
261 sk->refcount++;
262}
263
264void putsock(struct socket *sk)
265{
266 struct dgrambuf *buf;
267
268 if(--(sk->refcount) == 0)
269 {
270 switch(sk->type)
271 {
272 case SOCK_STREAM:
273 if(sk->outbuf.s.buf != NULL)
274 free(sk->outbuf.s.buf);
275 if(sk->inbuf.s.buf != NULL)
276 free(sk->inbuf.s.buf);
277 break;
278 case SOCK_DGRAM:
279 while((buf = sk->outbuf.d.f) != NULL)
280 {
281 sk->outbuf.d.f = buf->next;
282 free(buf->data);
161604ea 283 free(buf->addr);
d3372da9 284 free(buf);
285 }
286 while((buf = sk->inbuf.d.f) != NULL)
287 {
288 sk->inbuf.d.f = buf->next;
289 free(buf->data);
161604ea 290 free(buf->addr);
d3372da9 291 free(buf);
292 }
293 break;
294 }
b870805e 295 closesock(sk);
d3372da9 296 if(sk->remote != NULL)
297 free(sk->remote);
298 free(sk);
299 }
300}
301
336539c2 302void sockpushdata(struct socket *sk, void *buf, size_t size)
303{
304 switch(sk->type)
305 {
306 case SOCK_STREAM:
307 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1);
308 memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize);
309 memcpy(sk->inbuf.s.buf, buf, size);
310 sk->inbuf.s.datasize += size;
311 break;
312 case SOCK_DGRAM:
313 /* XXX */
314 break;
315 }
316 return;
317}
318
d3372da9 319void *sockgetinbuf(struct socket *sk, size_t *size)
320{
321 void *buf;
322 struct dgrambuf *dbuf;
323
324 switch(sk->type)
325 {
326 case SOCK_STREAM:
327 if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0))
328 {
329 *size = 0;
330 return(NULL);
331 }
332 buf = sk->inbuf.s.buf;
333 *size = sk->inbuf.s.datasize;
334 sk->inbuf.s.buf = NULL;
335 sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0;
336 return(buf);
337 case SOCK_DGRAM:
338 if((dbuf = sk->inbuf.d.f) == NULL)
339 return(NULL);
340 sk->inbuf.d.f = dbuf->next;
341 if(dbuf->next == NULL)
342 sk->inbuf.d.l = NULL;
343 buf = dbuf->data;
344 *size = dbuf->size;
345 free(dbuf->addr);
346 free(dbuf);
347 return(buf);
348 }
349 return(NULL);
350}
351
9e5f2b29 352static void recvcmsg(struct socket *sk, struct msghdr *msg)
353{
354 struct cmsghdr *cmsg;
9e5f2b29 355
356 for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg))
357 {
a8c5ada6 358#if UNIX_AUTH_STYLE == 1
9e5f2b29 359 if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS))
360 {
a8c5ada6 361 struct ucred *cred;
362 if(sk->ucred.uid == -1)
9e5f2b29 363 {
364 cred = (struct ucred *)CMSG_DATA(cmsg);
a8c5ada6 365 sk->ucred.uid = cred->uid;
366 sk->ucred.gid = cred->gid;
9e5f2b29 367 }
368 }
a8c5ada6 369#endif
9e5f2b29 370 }
371}
372
d3372da9 373static void sockrecv(struct socket *sk)
374{
375 int ret, inq;
376 struct dgrambuf *dbuf;
9e5f2b29 377 struct msghdr msg;
378 char cbuf[65536];
379 struct iovec bufvec;
d3372da9 380
9e5f2b29 381 memset(&msg, 0, sizeof(msg));
382 msg.msg_iov = &bufvec;
383 msg.msg_iovlen = 1;
384 msg.msg_control = cbuf;
385 msg.msg_controllen = sizeof(cbuf);
d3372da9 386 switch(sk->type)
387 {
388 case SOCK_STREAM:
389#if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
390 /* SIOCINQ is Linux-specific AFAIK, but I really have no idea
391 * how to read the inqueue size on other OSs */
dcf7a1a2
FT		 392 if(sk->isrealsocket) {
393 if(ioctl(sk->fd, SIOCINQ, &inq))
394 {
395 /* I don't really know what could go wrong here, so let's
396 * assume it's transient. */
397 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
398 inq = 2048;
399 }
400 } else {
401 /* There are perils when trying to use SIOCINQ on files >2GiB... */
402 inq = 65536;
d3372da9 403 }
404#else
405 inq = 2048;
406#endif
407 if(inq > 65536)
408 inq = 65536;
409 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
987518f8 410 if(sk->isrealsocket)
411 {
412 bufvec.iov_base = sk->inbuf.s.buf + sk->inbuf.s.datasize;
413 bufvec.iov_len = inq;
414 ret = recvmsg(sk->fd, &msg, 0);
415 } else {
416 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
417 msg.msg_controllen = 0;
418 msg.msg_flags = 0;
419 }
d3372da9 420 if(ret < 0)
421 {
422 if((errno == EINTR) || (errno == EAGAIN))
423 return;
cab0b442 424 if(sk->errcb != NULL)
425 sk->errcb(sk, errno, sk->data);
d3372da9 426 closesock(sk);
427 return;
428 }
9e5f2b29 429 if(msg.msg_flags & MSG_CTRUNC)
430 flog(LOG_DEBUG, "ancillary data was truncated");
431 else
432 recvcmsg(sk, &msg);
d3372da9 433 if(ret == 0)
434 {
cab0b442 435 if(sk->errcb != NULL)
436 sk->errcb(sk, 0, sk->data);
d3372da9 437 closesock(sk);
438 return;
439 }
440 sk->inbuf.s.datasize += ret;
cab0b442 441 if(sk->readcb != NULL)
442 sk->readcb(sk, sk->data);
d3372da9 443 break;
444 case SOCK_DGRAM:
9e5f2b29 445#if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
d3372da9 446 if(ioctl(sk->fd, SIOCINQ, &inq))
447 {
448 /* I don't really know what could go wrong here, so let's
449 * assume it's transient. */
450 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
451 return;
452 }
9e5f2b29 453#else
454 inq = 65536;
455#endif
d3372da9 456 dbuf = smalloc(sizeof(*dbuf));
457 dbuf->data = smalloc(inq);
458 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
9e5f2b29 459 /*
d3372da9 460 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
9e5f2b29 461 */
462 msg.msg_name = dbuf->addr;
463 msg.msg_namelen = dbuf->addrlen;
464 bufvec.iov_base = dbuf->data;
465 bufvec.iov_len = inq;
466 ret = recvmsg(sk->fd, &msg, 0);
467 dbuf->addrlen = msg.msg_namelen;
d3372da9 468 if(ret < 0)
469 {
470 free(dbuf->addr);
471 free(dbuf->data);
472 free(dbuf);
473 if((errno == EINTR) || (errno == EAGAIN))
474 return;
cab0b442 475 if(sk->errcb != NULL)
476 sk->errcb(sk, errno, sk->data);
d3372da9 477 closesock(sk);
478 return;
479 }
9e5f2b29 480 if(msg.msg_flags & MSG_CTRUNC)
481 flog(LOG_DEBUG, "ancillary data was truncated");
482 else
483 recvcmsg(sk, &msg);
d3372da9 484 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
485 * have EOF), but rather an empty packet. I don't know if any
486 * other potential DGRAM protocols might have an EOF
487 * condition, so let's play safe. */
488 if(ret == 0)
489 {
490 free(dbuf->addr);
491 free(dbuf->data);
492 free(dbuf);
493 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
494 {
cab0b442 495 if(sk->errcb != NULL)
496 sk->errcb(sk, 0, sk->data);
d3372da9 497 closesock(sk);
498 }
499 return;
500 }
501 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
502 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
503 dbuf->next = NULL;
504 if(sk->inbuf.d.l != NULL)
505 sk->inbuf.d.l->next = dbuf;
506 else
507 sk->inbuf.d.f = dbuf;
508 sk->inbuf.d.l = dbuf;
cab0b442 509 if(sk->readcb != NULL)
510 sk->readcb(sk, sk->data);
d3372da9 511 break;
512 }
513}
514
515static void sockflush(struct socket *sk)
516{
517 int ret;
518 struct dgrambuf *dbuf;
519
520 switch(sk->type)
521 {
522 case SOCK_STREAM:
523 if(sk->isrealsocket)
524 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
525 else
526 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
527 if(ret < 0)
528 {
c7ff7e93
FT		 529 if((errno != EINTR) && (errno != EAGAIN))
530 {
531 if(sk->errcb != NULL)
532 sk->errcb(sk, errno, sk->data);
533 closesock(sk);
534 }
d3372da9 535 break;
536 }
537 if(ret > 0)
538 {
539 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
cab0b442 540 if(sk->writecb != NULL)
541 sk->writecb(sk, sk->data);
d3372da9 542 }
543 break;
544 case SOCK_DGRAM:
545 dbuf = sk->outbuf.d.f;
546 if((sk->outbuf.d.f = dbuf->next) == NULL)
547 sk->outbuf.d.l = NULL;
548 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
549 free(dbuf->data);
550 free(dbuf->addr);
551 free(dbuf);
cab0b442 552 if(sk->writecb != NULL)
553 sk->writecb(sk, sk->data);
d3372da9 554 break;
555 }
556}
557
558void closesock(struct socket *sk)
559{
b870805e 560 struct sockaddr_un *un;
561
e0cbc756 562 if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX))
b870805e 563 {
7ab36fbd 564 if((sk->state == SOCK_LST) && strchr(un->sun_path, '/'))
b870805e 565 {
566 if(unlink(un->sun_path))
7ab36fbd 567 flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno));
b870805e 568 }
569 }
d3372da9 570 sk->state = SOCK_STL;
571 close(sk->fd);
572 sk->fd = -1;
573 sk->close = 0;
574}
575
576void sockqueue(struct socket *sk, void *data, size_t size)
577{
578 struct dgrambuf *new;
579
580 if(sk->state == SOCK_STL)
581 return;
582 switch(sk->type)
583 {
584 case SOCK_STREAM:
585 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
586 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
587 sk->outbuf.s.datasize += size;
588 break;
589 case SOCK_DGRAM:
590 if(sk->remote == NULL)
591 return;
592 new = smalloc(sizeof(*new));
593 new->next = NULL;
594 memcpy(new->data = smalloc(size), data, new->size = size);
595 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
596 if(sk->outbuf.d.l == NULL)
597 {
598 sk->outbuf.d.l = sk->outbuf.d.f = new;
599 } else {
600 sk->outbuf.d.l->next = new;
601 sk->outbuf.d.l = new;
602 }
603 break;
604 }
605}
606
607size_t sockgetdatalen(struct socket *sk)
608{
609 struct dgrambuf *b;
610 size_t ret;
611
612 switch(sk->type)
613 {
614 case SOCK_STREAM:
615 ret = sk->inbuf.s.datasize;
616 break;
617 case SOCK_DGRAM:
618 ret = 0;
619 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
620 ret += b->size;
621 break;
622 }
623 return(ret);
624}
625
626size_t sockqueuesize(struct socket *sk)
627{
628 struct dgrambuf *b;
629 size_t ret;
630
631 switch(sk->type)
632 {
633 case SOCK_STREAM:
634 ret = sk->outbuf.s.datasize;
635 break;
636 case SOCK_DGRAM:
637 ret = 0;
638 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
639 ret += b->size;
640 break;
641 }
642 return(ret);
643}
644
d3372da9 645/*
7ab36fbd 646 * Seriously, I don't know if it's naughty or not to remove
647 * pre-existing Unix sockets.
648 */
649static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen)
650{
651 struct sockaddr_un *un;
652 struct stat sb;
653
654 if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX))
655 return(-1);
656 un = (struct sockaddr_un *)name;
657 if(stat(un->sun_path, &sb))
658 return(-1);
659 if(!S_ISSOCK(sb.st_mode))
660 return(-1);
661 if(unlink(un->sun_path))
662 return(-1);
663 if(bind(sk->fd, name, namelen) < 0)
664 return(-1);
665 return(0);
666}
667
668/*
d3372da9 669 * The difference between netcslisten() and netcslistenlocal() is that
670 * netcslistenlocal() always listens on the local host, instead of
671 * following proxy/passive mode directions. It is suitable for eg. the
672 * UI channel, while the file sharing networks should, naturally, use
673 * netcslisten() instead.
674*/
675
cab0b442 676struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
d3372da9 677{
678 struct socket *sk;
66c517d2 679 int intbuf;
d3372da9 680
681 /* I don't know if this is actually correct (it probably isn't),
682 * but since, at on least Linux systems, PF_* are specifically
683 * #define'd to their AF_* counterparts, it allows for a severely
684 * smoother implementation. If it breaks something on your
685 * platform, please tell me so.
686 */
687 if((sk = mksock(name->sa_family, type)) == NULL)
688 return(NULL);
689 sk->state = SOCK_LST;
687b2ee2 690 if(confgetint("net", "reuseaddr"))
691 {
692 intbuf = 1;
693 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
694 }
7ab36fbd 695 if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0)))
d3372da9 696 {
697 putsock(sk);
698 return(NULL);
699 }
700 if(listen(sk->fd, 16) < 0)
701 {
702 putsock(sk);
703 return(NULL);
704 }
cab0b442 705 sk->acceptcb = func;
706 sk->data = data;
d3372da9 707 return(sk);
708}
709
cab0b442 710struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
c23acc61 711{
712 if(confgetint("net", "mode") == 1)
713 {
714 errno = EOPNOTSUPP;
715 return(NULL);
716 }
c23acc61 717 if(confgetint("net", "mode") == 0)
718 return(netcslistenlocal(type, name, namelen, func, data));
719 errno = EOPNOTSUPP;
720 return(NULL);
721}
722
cab0b442 723struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
0a1bc5b1 724{
725 struct sockaddr_in addr;
726#ifdef HAVE_IPV6
727 struct sockaddr_in6 addr6;
728#endif
cab0b442 729 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
0a1bc5b1 730 struct socket *ret;
731
732 if(local)
733 csfunc = netcslistenlocal;
734 else
735 csfunc = netcslisten;
736#ifdef HAVE_IPV6
737 memset(&addr6, 0, sizeof(addr6));
738 addr6.sin6_family = AF_INET6;
739 addr6.sin6_port = htons(port);
740 addr6.sin6_addr = in6addr_any;
741 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
742 return(ret);
743 if((ret == NULL) && (errno != EAFNOSUPPORT))
744 return(NULL);
745#endif
746 memset(&addr, 0, sizeof(addr));
747 addr.sin_family = AF_INET;
748 addr.sin_port = htons(port);
749 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
750}
751
d3372da9 752struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
753{
754 struct socket *sk;
755 int mode;
756
757 mode = confgetint("net", "mode");
758 if((mode == 0) || (mode == 1))
759 {
760 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
761 return(NULL);
762 if(bind(sk->fd, name, namelen) < 0)
763 {
764 putsock(sk);
765 return(NULL);
766 }
767 sk->state = SOCK_EST;
768 return(sk);
769 }
770 errno = EOPNOTSUPP;
771 return(NULL);
772}
773
774struct socket *netdupsock(struct socket *sk)
775{
776 struct socket *newsk;
777
778 newsk = newsock(sk->type);
779 if((newsk->fd = dup(sk->fd)) < 0)
780 {
781 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
782 putsock(newsk);
783 return(NULL);
784 }
785 newsk->state = sk->state;
786 newsk->ignread = sk->ignread;
787 if(sk->remote != NULL)
788 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
789 return(newsk);
790}
791
792void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
793{
794 if(sk->remote != NULL)
795 free(sk->remote);
796 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
797 sk->ignread = 1;
798}
799
cab0b442 800struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
d3372da9 801{
802 struct socket *sk;
803 int mode;
804
805 mode = confgetint("net", "mode");
806 if((mode == 0) || (mode == 1))
807 {
808 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
809 return(NULL);
810 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
811 if(!connect(sk->fd, addr, addrlen))
812 {
813 sk->state = SOCK_EST;
814 func(sk, 0, data);
815 return(sk);
816 }
817 if(errno == EINPROGRESS)
818 {
819 sk->state = SOCK_SYN;
cab0b442 820 sk->conncb = func;
821 sk->data = data;
d3372da9 822 return(sk);
823 }
824 putsock(sk);
825 return(NULL);
826 }
827 errno = EOPNOTSUPP;
828 return(NULL);
829}
830
9e5f2b29 831static void acceptunix(struct socket *sk)
832{
833 int buf;
834
835 buf = 1;
a8c5ada6 836#if UNIX_AUTH_STYLE == 1
9e5f2b29 837 if(setsockopt(sk->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0)
838 flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", sk->fd, strerror(errno));
a8c5ada6 839#elif UNIX_AUTH_STYLE == 2
840 if(getpeereid(sk->fd, &sk->ucred.uid, &sk->ucred.gid) < 0)
841 {
842 flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", sk->fd, strerror(errno));
843 sk->ucred.uid = -1;
844 sk->ucred.gid = -1;
845 }
846#endif
9e5f2b29 847}
848
d3372da9 849int pollsocks(int timeout)
850{
72a7835e 851 int ret, fd;
eaa35963 852 socklen_t retlen;
72a7835e
FT		 853 int newfd, maxfd;
854 fd_set rfds, wfds, efds;
d3372da9 855 struct socket *sk, *next, *newsk;
856 struct sockaddr_storage ss;
857 socklen_t sslen;
72a7835e 858 struct timeval tv;
d3372da9 859
72a7835e
FT		 860 FD_ZERO(&rfds);
861 FD_ZERO(&wfds);
862 FD_ZERO(&efds);
863 for(maxfd = 0, sk = sockets; sk != NULL; sk = sk->next)
d3372da9 864 {
72a7835e 865 if((sk->state == SOCK_STL) || (sk->fd < 0))
d3372da9 866 continue;
d3372da9 867 if(!sk->ignread)
72a7835e 868 FD_SET(sk->fd, &rfds);
d3372da9 869 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
72a7835e
FT		 870 FD_SET(sk->fd, &wfds);
871 FD_SET(sk->fd, &efds);
872 if(sk->fd > maxfd)
873 maxfd = sk->fd;
d3372da9 874 }
72a7835e
FT		 875 tv.tv_sec = timeout / 1000;
876 tv.tv_usec = (timeout % 1000) * 1000;
877 ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv);
d3372da9 878 if(ret < 0)
879 {
880 if(errno != EINTR)
881 {
72a7835e 882 flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno));
d3372da9 883 /* To avoid CPU hogging in case it's bad, which it
884 * probably is. */
885 sleep(1);
886 }
d3372da9 887 return(1);
888 }
889 for(sk = sockets; sk != NULL; sk = next)
890 {
891 next = sk->next;
72a7835e 892 fd = sk->fd;
d3372da9 893 switch(sk->state)
894 {
895 case SOCK_LST:
72a7835e 896 if(FD_ISSET(fd, &rfds))
d3372da9 897 {
898 sslen = sizeof(ss);
72a7835e 899 if((newfd = accept(fd, (struct sockaddr *)&ss, &sslen)) < 0)
cab0b442 900 {
901 if(sk->errcb != NULL)
902 sk->errcb(sk, errno, sk->data);
903 }
d3372da9 904 newsk = newsock(sk->type);
905 newsk->fd = newfd;
906 newsk->family = sk->family;
907 newsk->state = SOCK_EST;
908 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
909 newsk->remotelen = sslen;
9e5f2b29 910 if(ss.ss_family == PF_UNIX)
911 acceptunix(newsk);
cab0b442 912 if(sk->acceptcb != NULL)
913 sk->acceptcb(sk, newsk, sk->data);
9e5f2b29 914 putsock(newsk);
d3372da9 915 }
72a7835e 916 if(FD_ISSET(fd, &efds))
d3372da9 917 {
918 retlen = sizeof(ret);
72a7835e 919 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
cab0b442 920 if(sk->errcb != NULL)
921 sk->errcb(sk, ret, sk->data);
d3372da9 922 continue;
923 }
924 break;
925 case SOCK_SYN:
72a7835e 926 if(FD_ISSET(fd, &efds))
d3372da9 927 {
928 retlen = sizeof(ret);
72a7835e 929 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
cab0b442 930 if(sk->conncb != NULL)
931 sk->conncb(sk, ret, sk->data);
d3372da9 932 closesock(sk);
933 continue;
934 }
72a7835e 935 if(FD_ISSET(fd, &rfds) || FD_ISSET(fd, &wfds))
d3372da9 936 {
937 sk->state = SOCK_EST;
cab0b442 938 if(sk->conncb != NULL)
939 sk->conncb(sk, 0, sk->data);
d3372da9 940 }
941 break;
942 case SOCK_EST:
72a7835e 943 if(FD_ISSET(fd, &efds))
d3372da9 944 {
945 retlen = sizeof(ret);
72a7835e 946 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
cab0b442 947 if(sk->errcb != NULL)
948 sk->errcb(sk, ret, sk->data);
d3372da9 949 closesock(sk);
950 continue;
951 }
72a7835e 952 if(FD_ISSET(fd, &rfds))
d3372da9 953 sockrecv(sk);
72a7835e 954 if(FD_ISSET(fd, &wfds))
d3372da9 955 {
956 if(sockqueuesize(sk) > 0)
957 sockflush(sk);
958 }
959 break;
960 }
d3372da9 961 }
d3372da9 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 }
e03e1e7c 1010 if(setsockopt(sk->fd, IPPROTO_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 {
b4d16e90 1074 errno = ENOENT;
d3372da9 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 {
b4d16e90 1082 errno = ENOENT;
d3372da9 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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