2 * Dolda Connect - Modular multiuser Direct Connect-style client
3 * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com)
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.
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.
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
19 /* XXX: Implement SOCKS proxyability */
28 #include <sys/ioctl.h>
29 #include <sys/socket.h>
32 #include <arpa/inet.h>
33 #include <netinet/in.h>
35 #include <sys/signal.h>
36 #ifdef HAVE_LINUX_SOCKIOS_H
37 #include <linux/sockios.h>
47 #include "sysevents.h"
49 static struct configvar myvars[] =
51 /* 0 = Direct mode, 1 = Passive mode, 2 = SOCKS proxy */
52 {CONF_VAR_INT, "mode", {.num = 0}},
53 {CONF_VAR_BOOL, "reuseaddr", {.num = 0}},
54 /* Only for direct mode */
55 {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}},
56 {CONF_VAR_STRING, "publicif", {.str = L""}},
57 /* Diffserv should be supported on IPv4, too, but I don't know the
59 {CONF_VAR_INT, "diffserv-mincost", {.num = 0}},
60 {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}},
61 {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}},
62 {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}},
66 static struct socket *sockets = NULL;
69 /* XXX: Get autoconf for all this... */
70 int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf)
72 struct sockaddr_in *ipv4;
73 struct configvar *var;
77 struct ifreq *ifr, req;
82 var = confgetvar("net", "visibleipv4");
83 if(var->val.ipv4.s_addr != 0)
85 ipv4 = smalloc(sizeof(*ipv4));
86 ipv4->sin_family = AF_INET;
87 ipv4->sin_addr.s_addr = var->val.ipv4.s_addr;
88 *addr = (struct sockaddr *)ipv4;
89 *lenbuf = sizeof(*ipv4);
92 if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL)
94 flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno));
97 if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
99 conf.ifc_buf = smalloc(conf.ifc_len = 65536);
100 if(ioctl(sock, SIOCGIFCONF, &conf) < 0)
106 bufend = ((char *)conf.ifc_buf) + conf.ifc_len;
108 for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++)
110 memset(&req, 0, sizeof(req));
111 memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
112 if(ioctl(sock, SIOCGIFFLAGS, &req) < 0)
118 if(!(req.ifr_flags & IFF_UP))
120 if(ifr->ifr_addr.sa_family == AF_INET)
122 if(ntohl(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr.s_addr) == 0x7f000001)
126 ipv4 = smalloc(sizeof(*ipv4));
127 memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr));
132 flog(LOG_WARNING, "could not locate an unambiguous interface for determining your public IP address - set net.publicif");
133 errno = ENFILE; /* XXX: There's no appropriate one for this... */
142 *addr = (struct sockaddr *)ipv4;
143 *lenbuf = sizeof(*ipv4);
149 errno = EPFNOSUPPORT;
153 static struct socket *newsock(int type)
157 new = smalloc(sizeof(*new));
160 new->isrealsocket = 1;
172 new->outbuf.s.buf = NULL;
173 new->outbuf.s.bufsize = 0;
174 new->outbuf.s.datasize = 0;
175 new->inbuf.s.buf = NULL;
176 new->inbuf.s.bufsize = 0;
177 new->inbuf.s.datasize = 0;
180 new->outbuf.d.f = new->outbuf.d.l = NULL;
181 new->inbuf.d.f = new->inbuf.d.l = NULL;
188 new->acceptcb = NULL;
198 static struct socket *mksock(int domain, int type)
203 if((fd = socket(domain, type, 0)) < 0)
205 flog(LOG_CRIT, "could not create socket: %s", strerror(errno));
210 new->family = domain;
211 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
215 struct socket *wrapsock(int fd)
219 new = newsock(SOCK_STREAM);
221 new->state = SOCK_EST;
222 new->isrealsocket = 0;
223 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
227 static void unlinksock(struct socket *sk)
230 sk->prev->next = sk->next;
232 sk->next->prev = sk->prev;
239 void getsock(struct socket *sk)
244 void putsock(struct socket *sk)
246 struct dgrambuf *buf;
248 if(--(sk->refcount) == 0)
253 if(sk->outbuf.s.buf != NULL)
254 free(sk->outbuf.s.buf);
255 if(sk->inbuf.s.buf != NULL)
256 free(sk->inbuf.s.buf);
259 while((buf = sk->outbuf.d.f) != NULL)
261 sk->outbuf.d.f = buf->next;
265 while((buf = sk->inbuf.d.f) != NULL)
267 sk->inbuf.d.f = buf->next;
275 if(sk->remote != NULL)
281 void sockpushdata(struct socket *sk, void *buf, size_t size)
286 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1);
287 memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize);
288 memcpy(sk->inbuf.s.buf, buf, size);
289 sk->inbuf.s.datasize += size;
298 void *sockgetinbuf(struct socket *sk, size_t *size)
301 struct dgrambuf *dbuf;
306 if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0))
311 buf = sk->inbuf.s.buf;
312 *size = sk->inbuf.s.datasize;
313 sk->inbuf.s.buf = NULL;
314 sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0;
317 if((dbuf = sk->inbuf.d.f) == NULL)
319 sk->inbuf.d.f = dbuf->next;
320 if(dbuf->next == NULL)
321 sk->inbuf.d.l = NULL;
331 static void sockrecv(struct socket *sk)
334 struct dgrambuf *dbuf;
339 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
340 /* SIOCINQ is Linux-specific AFAIK, but I really have no idea
341 * how to read the inqueue size on other OSs */
342 if(ioctl(sk->fd, SIOCINQ, &inq))
344 /* I don't really know what could go wrong here, so let's
345 * assume it's transient. */
346 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
354 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
355 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
358 if((errno == EINTR) || (errno == EAGAIN))
360 if(sk->errcb != NULL)
361 sk->errcb(sk, errno, sk->data);
367 if(sk->errcb != NULL)
368 sk->errcb(sk, 0, sk->data);
372 sk->inbuf.s.datasize += ret;
373 if(sk->readcb != NULL)
374 sk->readcb(sk, sk->data);
377 if(ioctl(sk->fd, SIOCINQ, &inq))
379 /* I don't really know what could go wrong here, so let's
380 * assume it's transient. */
381 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
384 dbuf = smalloc(sizeof(*dbuf));
385 dbuf->data = smalloc(inq);
386 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
387 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
393 if((errno == EINTR) || (errno == EAGAIN))
395 if(sk->errcb != NULL)
396 sk->errcb(sk, errno, sk->data);
400 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
401 * have EOF), but rather an empty packet. I don't know if any
402 * other potential DGRAM protocols might have an EOF
403 * condition, so let's play safe. */
409 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
411 if(sk->errcb != NULL)
412 sk->errcb(sk, 0, sk->data);
417 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
418 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
420 if(sk->inbuf.d.l != NULL)
421 sk->inbuf.d.l->next = dbuf;
423 sk->inbuf.d.f = dbuf;
424 sk->inbuf.d.l = dbuf;
425 if(sk->readcb != NULL)
426 sk->readcb(sk, sk->data);
431 static void sockflush(struct socket *sk)
434 struct dgrambuf *dbuf;
440 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
442 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
445 /* For now, assume transient error, since
446 * the socket is polled for errors */
451 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
452 if(sk->writecb != NULL)
453 sk->writecb(sk, sk->data);
457 dbuf = sk->outbuf.d.f;
458 if((sk->outbuf.d.f = dbuf->next) == NULL)
459 sk->outbuf.d.l = NULL;
460 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
464 if(sk->writecb != NULL)
465 sk->writecb(sk, sk->data);
470 void closesock(struct socket *sk)
472 sk->state = SOCK_STL;
478 void sockqueue(struct socket *sk, void *data, size_t size)
480 struct dgrambuf *new;
482 if(sk->state == SOCK_STL)
487 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
488 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
489 sk->outbuf.s.datasize += size;
492 if(sk->remote == NULL)
494 new = smalloc(sizeof(*new));
496 memcpy(new->data = smalloc(size), data, new->size = size);
497 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
498 if(sk->outbuf.d.l == NULL)
500 sk->outbuf.d.l = sk->outbuf.d.f = new;
502 sk->outbuf.d.l->next = new;
503 sk->outbuf.d.l = new;
509 size_t sockgetdatalen(struct socket *sk)
517 ret = sk->inbuf.s.datasize;
521 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
528 size_t sockqueuesize(struct socket *sk)
536 ret = sk->outbuf.s.datasize;
540 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
548 * The difference between netcslisten() and netcslistenlocal() is that
549 * netcslistenlocal() always listens on the local host, instead of
550 * following proxy/passive mode directions. It is suitable for eg. the
551 * UI channel, while the file sharing networks should, naturally, use
552 * netcslisten() instead.
555 struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
560 /* I don't know if this is actually correct (it probably isn't),
561 * but since, at on least Linux systems, PF_* are specifically
562 * #define'd to their AF_* counterparts, it allows for a severely
563 * smoother implementation. If it breaks something on your
564 * platform, please tell me so.
566 if((sk = mksock(name->sa_family, type)) == NULL)
568 sk->state = SOCK_LST;
569 if(confgetint("net", "reuseaddr"))
572 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
574 if(bind(sk->fd, name, namelen) < 0)
579 if(listen(sk->fd, 16) < 0)
589 struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
591 if(confgetint("net", "mode") == 1)
596 if(confgetint("net", "mode") == 0)
597 return(netcslistenlocal(type, name, namelen, func, data));
602 struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
604 struct sockaddr_in addr;
606 struct sockaddr_in6 addr6;
608 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
612 csfunc = netcslistenlocal;
614 csfunc = netcslisten;
616 memset(&addr6, 0, sizeof(addr6));
617 addr6.sin6_family = AF_INET6;
618 addr6.sin6_port = htons(port);
619 addr6.sin6_addr = in6addr_any;
620 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
622 if((ret == NULL) && (errno != EAFNOSUPPORT))
625 memset(&addr, 0, sizeof(addr));
626 addr.sin_family = AF_INET;
627 addr.sin_port = htons(port);
628 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
631 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
636 mode = confgetint("net", "mode");
637 if((mode == 0) || (mode == 1))
639 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
641 if(bind(sk->fd, name, namelen) < 0)
646 sk->state = SOCK_EST;
653 struct socket *netdupsock(struct socket *sk)
655 struct socket *newsk;
657 newsk = newsock(sk->type);
658 if((newsk->fd = dup(sk->fd)) < 0)
660 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
664 newsk->state = sk->state;
665 newsk->ignread = sk->ignread;
666 if(sk->remote != NULL)
667 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
671 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
673 if(sk->remote != NULL)
675 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
679 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
684 mode = confgetint("net", "mode");
685 if((mode == 0) || (mode == 1))
687 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
689 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
690 if(!connect(sk->fd, addr, addrlen))
692 sk->state = SOCK_EST;
696 if(errno == EINPROGRESS)
698 sk->state = SOCK_SYN;
710 int pollsocks(int timeout)
712 int i, num, ret, retlen;
715 struct socket *sk, *next, *newsk;
716 struct sockaddr_storage ss;
719 pfds = smalloc(sizeof(*pfds) * (num = numsocks));
720 for(i = 0, sk = sockets; i < num; sk = sk->next)
722 if(sk->state == SOCK_STL)
730 pfds[i].events |= POLLIN;
731 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
732 pfds[i].events |= POLLOUT;
736 ret = poll(pfds, num, timeout);
741 flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno));
742 /* To avoid CPU hogging in case it's bad, which it
749 for(sk = sockets; sk != NULL; sk = next)
752 for(i = 0; i < num; i++)
754 if(pfds[i].fd == sk->fd)
762 if(pfds[i].revents & POLLIN)
765 if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0)
767 if(sk->errcb != NULL)
768 sk->errcb(sk, errno, sk->data);
770 newsk = newsock(sk->type);
772 newsk->family = sk->family;
773 newsk->state = SOCK_EST;
774 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
775 newsk->remotelen = sslen;
777 if(sk->acceptcb != NULL)
778 sk->acceptcb(sk, newsk, sk->data);
780 if(pfds[i].revents & POLLERR)
782 retlen = sizeof(ret);
783 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
784 if(sk->errcb != NULL)
785 sk->errcb(sk, ret, sk->data);
790 if(pfds[i].revents & POLLERR)
792 retlen = sizeof(ret);
793 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
794 if(sk->conncb != NULL)
795 sk->conncb(sk, ret, sk->data);
799 if(pfds[i].revents & (POLLIN | POLLOUT))
801 sk->state = SOCK_EST;
802 if(sk->conncb != NULL)
803 sk->conncb(sk, 0, sk->data);
807 if(pfds[i].revents & POLLERR)
809 retlen = sizeof(ret);
810 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
811 if(sk->errcb != NULL)
812 sk->errcb(sk, ret, sk->data);
816 if(pfds[i].revents & POLLIN)
818 if(pfds[i].revents & POLLOUT)
820 if(sockqueuesize(sk) > 0)
825 if(pfds[i].revents & POLLNVAL)
827 flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd);
828 sk->state = SOCK_STL;
832 if(pfds[i].revents & POLLHUP)
834 if(sk->errcb != NULL)
835 sk->errcb(sk, 0, sk->data);
842 for(sk = sockets; sk != NULL; sk = next)
845 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
850 if(sk->close && (sockqueuesize(sk) == 0))
852 if(sk->state == SOCK_STL)
861 int socksettos(struct socket *sk, int tos)
865 if(sk->family == AF_INET)
872 case SOCK_TOS_MINCOST:
875 case SOCK_TOS_MAXREL:
881 case SOCK_TOS_MINDELAY:
885 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
888 if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0)
890 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
895 if(sk->family == AF_INET6)
901 case SOCK_TOS_MINCOST:
902 buf = confgetint("net", "diffserv-mincost");
904 case SOCK_TOS_MAXREL:
905 buf = confgetint("net", "diffserv-maxrel");
908 buf = confgetint("net", "diffserv-maxtp");
910 case SOCK_TOS_MINDELAY:
911 buf = confgetint("net", "diffserv-mindelay");
914 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
918 On Linux, the API IPv6 flow label management doesn't seem to
919 be entirely complete, so I guess this will have to wait.
921 if(setsockopt(...) < 0)
923 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
929 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
936 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
938 struct sockaddr_storage addr;
942 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
946 struct sockaddr_in *ipv4;
950 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
953 data->callback(NULL, 0, data->data);
955 ipv4 = (struct sockaddr_in *)&data->addr;
956 memcpy(&ipv4->sin_addr, buf, 4);
957 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
961 data->callback(NULL, 0, data->data);
967 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
974 struct resolvedata *rdata;
975 struct sockaddr_in ipv4;
981 if((p = strchr(addr, ':')) != NULL)
986 ipv4.sin_family = AF_INET;
987 ipv4.sin_port = htons(port);
988 if(inet_aton(addr, &ipv4.sin_addr))
990 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
992 sigemptyset(&sigset);
993 sigaddset(&sigset, SIGCHLD);
994 sigprocmask(SIG_BLOCK, &sigset, NULL);
995 if((pipe(pfd) < 0) || ((child = fork()) < 0))
997 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1002 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1003 for(i = 3; i < FD_SETSIZE; i++)
1008 signal(SIGALRM, SIG_DFL);
1010 if((he = gethostbyname(addr)) == NULL)
1012 write(pfd[1], he->h_addr_list[0], 4);
1016 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1017 rdata = smalloc(sizeof(*rdata));
1019 rdata->callback = callback;
1021 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1022 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1023 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1030 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1033 struct sockaddr_storage name;
1036 if((sk->state == SOCK_STL) || (sk->fd < 0))
1039 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1041 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname");
1044 *namebuf = memcpy(smalloc(len), &name, len);
1049 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1052 struct sockaddr_storage name;
1053 struct sockaddr_in *ipv4;
1054 struct sockaddr *pname;
1057 switch(confgetint("net", "mode"))
1061 if((sk->state == SOCK_STL) || (sk->fd < 0))
1064 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1066 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetremotename");
1069 if(name.ss_family == AF_INET)
1071 ipv4 = (struct sockaddr_in *)&name;
1072 if(getpublicaddr(AF_INET, &pname, &pnamelen) < 0)
1074 flog(LOG_WARNING, "could not determine public IP address - strange things may happen");
1077 ipv4->sin_addr.s_addr = ((struct sockaddr_in *)pname)->sin_addr.s_addr;
1080 *namebuf = memcpy(smalloc(len), &name, len);
1087 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1093 int addreq(struct sockaddr *x, struct sockaddr *y)
1095 struct sockaddr_un *u1, *u2;
1096 struct sockaddr_in *n1, *n2;
1098 struct sockaddr_in6 *s1, *s2;
1101 if(x->sa_family != y->sa_family)
1103 switch(x->sa_family) {
1105 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1106 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1110 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1111 if(n1->sin_port != n2->sin_port)
1113 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1117 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1118 if(s1->sin6_port != s2->sin6_port)
1120 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1127 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1129 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1130 * lowercase letters to 1, so I do this
1132 struct sockaddr_in *ipv4;
1134 struct sockaddr_in6 *ipv6;
1136 static char *ret = NULL;
1142 switch(arg->sa_family)
1145 UNIX = (struct sockaddr_un *)arg;
1146 ret = sprintf2("%s", UNIX->sun_path);
1149 ipv4 = (struct sockaddr_in *)arg;
1150 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1152 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1156 ipv6 = (struct sockaddr_in6 *)arg;
1157 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1159 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
1163 errno = EPFNOSUPPORT;
1172 * It was very nice to use this, but it seems
1173 * to mess things up, so I guess it has to go... :-(
1176 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1178 struct sockaddr *arg;
1180 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1181 * lowercase letters to 1, so I do this
1183 struct sockaddr_in *ipv4;
1186 arg = *(struct sockaddr **)(args[0]);
1187 arglen = *(socklen_t *)(args[1]);
1188 switch(arg->sa_family)
1191 UNIX = (struct sockaddr_un *)arg;
1192 ret = fprintf(stream, "%s", UNIX->sun_path);
1195 ipv4 = (struct sockaddr_in *)arg;
1196 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1200 errno = EPFNOSUPPORT;
1206 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1209 argtypes[0] = PA_POINTER;
1211 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1212 * be an int, so I guess this should be
1218 static int init(int hup)
1223 if(register_printf_function('N', formataddress, formataddress_arginfo))
1225 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1233 static void terminate(void)
1235 while(sockets != NULL)
1236 unlinksock(sockets);
1239 static struct module me =
1247 .terminate = terminate