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>
37 #ifdef HAVE_LINUX_SOCKIOS_H
38 #include <linux/sockios.h>
48 #include "sysevents.h"
50 static struct configvar myvars[] =
52 /* 0 = Direct mode, 1 = Passive mode, 2 = SOCKS proxy */
53 {CONF_VAR_INT, "mode", {.num = 0}},
54 {CONF_VAR_BOOL, "reuseaddr", {.num = 0}},
55 /* Only for direct mode */
56 {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}},
57 {CONF_VAR_STRING, "publicif", {.str = L""}},
58 /* Diffserv should be supported on IPv4, too, but I don't know the
60 {CONF_VAR_INT, "diffserv-mincost", {.num = 0}},
61 {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}},
62 {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}},
63 {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}},
67 static struct socket *sockets = NULL;
70 /* XXX: Get autoconf for all this... */
71 int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf)
73 struct sockaddr_in *ipv4;
74 struct configvar *var;
78 struct ifreq *ifr, req;
83 var = confgetvar("net", "visibleipv4");
84 if(var->val.ipv4.s_addr != 0)
86 ipv4 = smalloc(sizeof(*ipv4));
87 ipv4->sin_family = AF_INET;
88 ipv4->sin_addr.s_addr = var->val.ipv4.s_addr;
89 *addr = (struct sockaddr *)ipv4;
90 *lenbuf = sizeof(*ipv4);
93 if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL)
95 flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno));
98 if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
100 conf.ifc_buf = smalloc(conf.ifc_len = 65536);
101 if(ioctl(sock, SIOCGIFCONF, &conf) < 0)
107 bufend = ((char *)conf.ifc_buf) + conf.ifc_len;
109 for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++)
111 memset(&req, 0, sizeof(req));
112 memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
113 if(ioctl(sock, SIOCGIFFLAGS, &req) < 0)
119 if(!(req.ifr_flags & IFF_UP))
121 if(ifr->ifr_addr.sa_family == AF_INET)
123 if(ntohl(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr.s_addr) == 0x7f000001)
127 ipv4 = smalloc(sizeof(*ipv4));
128 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 /* I don't know if this is actually correct (it probably isn't),
597 * but since, at on least Linux systems, PF_* are specifically
598 * #define'd to their AF_* counterparts, it allows for a severely
599 * smoother implementation. If it breaks something on your
600 * platform, please tell me so.
602 if(confgetint("net", "mode") == 0)
603 return(netcslistenlocal(type, name, namelen, func, data));
608 struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
610 struct sockaddr_in addr;
612 struct sockaddr_in6 addr6;
614 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
618 csfunc = netcslistenlocal;
620 csfunc = netcslisten;
622 memset(&addr6, 0, sizeof(addr6));
623 addr6.sin6_family = AF_INET6;
624 addr6.sin6_port = htons(port);
625 addr6.sin6_addr = in6addr_any;
626 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
628 if((ret == NULL) && (errno != EAFNOSUPPORT))
631 memset(&addr, 0, sizeof(addr));
632 addr.sin_family = AF_INET;
633 addr.sin_port = htons(port);
634 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
637 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
642 mode = confgetint("net", "mode");
643 if((mode == 0) || (mode == 1))
645 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
647 if(bind(sk->fd, name, namelen) < 0)
652 sk->state = SOCK_EST;
659 struct socket *netdupsock(struct socket *sk)
661 struct socket *newsk;
663 newsk = newsock(sk->type);
664 if((newsk->fd = dup(sk->fd)) < 0)
666 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
670 newsk->state = sk->state;
671 newsk->ignread = sk->ignread;
672 if(sk->remote != NULL)
673 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
677 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
679 if(sk->remote != NULL)
681 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
685 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
690 mode = confgetint("net", "mode");
691 if((mode == 0) || (mode == 1))
693 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
695 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
696 if(!connect(sk->fd, addr, addrlen))
698 sk->state = SOCK_EST;
702 if(errno == EINPROGRESS)
704 sk->state = SOCK_SYN;
716 int pollsocks(int timeout)
718 int i, num, ret, retlen;
721 struct socket *sk, *next, *newsk;
722 struct sockaddr_storage ss;
725 pfds = smalloc(sizeof(*pfds) * (num = numsocks));
726 for(i = 0, sk = sockets; i < num; sk = sk->next)
728 if(sk->state == SOCK_STL)
736 pfds[i].events |= POLLIN;
737 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
738 pfds[i].events |= POLLOUT;
742 ret = poll(pfds, num, timeout);
747 flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno));
748 /* To avoid CPU hogging in case it's bad, which it
755 for(sk = sockets; sk != NULL; sk = next)
758 for(i = 0; i < num; i++)
760 if(pfds[i].fd == sk->fd)
768 if(pfds[i].revents & POLLIN)
771 if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0)
773 if(sk->errcb != NULL)
774 sk->errcb(sk, errno, sk->data);
776 newsk = newsock(sk->type);
778 newsk->family = sk->family;
779 newsk->state = SOCK_EST;
780 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
781 newsk->remotelen = sslen;
783 if(sk->acceptcb != NULL)
784 sk->acceptcb(sk, newsk, sk->data);
786 if(pfds[i].revents & POLLERR)
788 retlen = sizeof(ret);
789 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
790 if(sk->errcb != NULL)
791 sk->errcb(sk, ret, sk->data);
796 if(pfds[i].revents & POLLERR)
798 retlen = sizeof(ret);
799 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
800 if(sk->conncb != NULL)
801 sk->conncb(sk, ret, sk->data);
805 if(pfds[i].revents & (POLLIN | POLLOUT))
807 sk->state = SOCK_EST;
808 if(sk->conncb != NULL)
809 sk->conncb(sk, 0, sk->data);
813 if(pfds[i].revents & POLLERR)
815 retlen = sizeof(ret);
816 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
817 if(sk->errcb != NULL)
818 sk->errcb(sk, ret, sk->data);
822 if(pfds[i].revents & POLLIN)
824 if(pfds[i].revents & POLLOUT)
826 if(sockqueuesize(sk) > 0)
831 if(pfds[i].revents & POLLNVAL)
833 flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd);
834 sk->state = SOCK_STL;
838 if(pfds[i].revents & POLLHUP)
840 if(sk->errcb != NULL)
841 sk->errcb(sk, 0, sk->data);
848 for(sk = sockets; sk != NULL; sk = next)
851 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
856 if(sk->close && (sockqueuesize(sk) == 0))
858 if(sk->state == SOCK_STL)
867 int socksettos(struct socket *sk, int tos)
871 if(sk->family == AF_INET)
878 case SOCK_TOS_MINCOST:
881 case SOCK_TOS_MAXREL:
887 case SOCK_TOS_MINDELAY:
891 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
894 if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0)
896 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
901 if(sk->family == AF_INET6)
907 case SOCK_TOS_MINCOST:
908 buf = confgetint("net", "diffserv-mincost");
910 case SOCK_TOS_MAXREL:
911 buf = confgetint("net", "diffserv-maxrel");
914 buf = confgetint("net", "diffserv-maxtp");
916 case SOCK_TOS_MINDELAY:
917 buf = confgetint("net", "diffserv-mindelay");
920 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
924 On Linux, the API IPv6 flow label management doesn't seem to
925 be entirely complete, so I guess this will have to wait.
927 if(setsockopt(...) < 0)
929 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
935 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
942 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
944 struct sockaddr_storage addr;
948 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
952 struct sockaddr_in *ipv4;
956 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
959 data->callback(NULL, 0, data->data);
961 ipv4 = (struct sockaddr_in *)&data->addr;
962 memcpy(&ipv4->sin_addr, buf, 4);
963 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
967 data->callback(NULL, 0, data->data);
973 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
980 struct resolvedata *rdata;
981 struct sockaddr_in ipv4;
987 if((p = strchr(addr, ':')) != NULL)
992 ipv4.sin_family = AF_INET;
993 ipv4.sin_port = htons(port);
994 if(inet_aton(addr, &ipv4.sin_addr))
996 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
998 sigemptyset(&sigset);
999 sigaddset(&sigset, SIGCHLD);
1000 sigprocmask(SIG_BLOCK, &sigset, NULL);
1001 if((pipe(pfd) < 0) || ((child = fork()) < 0))
1003 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1008 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1009 for(i = 3; i < FD_SETSIZE; i++)
1014 signal(SIGALRM, SIG_DFL);
1016 if((he = gethostbyname(addr)) == NULL)
1018 write(pfd[1], he->h_addr_list[0], 4);
1022 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1023 rdata = smalloc(sizeof(*rdata));
1025 rdata->callback = callback;
1027 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1028 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1029 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1036 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1039 struct sockaddr_storage name;
1042 if((sk->state == SOCK_STL) || (sk->fd < 0))
1045 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1047 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname");
1050 *namebuf = memcpy(smalloc(len), &name, len);
1055 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1058 struct sockaddr_storage name;
1059 struct sockaddr_in *ipv4;
1060 struct sockaddr *pname;
1063 switch(confgetint("net", "mode"))
1067 if((sk->state == SOCK_STL) || (sk->fd < 0))
1070 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1072 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetremotename");
1075 if(name.ss_family == AF_INET)
1077 ipv4 = (struct sockaddr_in *)&name;
1078 if(getpublicaddr(AF_INET, &pname, &pnamelen) < 0)
1080 flog(LOG_WARNING, "could not determine public IP address - strange things may happen");
1083 ipv4->sin_addr.s_addr = ((struct sockaddr_in *)pname)->sin_addr.s_addr;
1086 *namebuf = memcpy(smalloc(len), &name, len);
1093 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1099 int addreq(struct sockaddr *x, struct sockaddr *y)
1101 struct sockaddr_un *u1, *u2;
1102 struct sockaddr_in *n1, *n2;
1104 struct sockaddr_in6 *s1, *s2;
1107 if(x->sa_family != y->sa_family)
1109 switch(x->sa_family) {
1111 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1112 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1116 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1117 if(n1->sin_port != n2->sin_port)
1119 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1123 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1124 if(s1->sin6_port != s2->sin6_port)
1126 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1133 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1135 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1136 * lowercase letters to 1, so I do this
1138 struct sockaddr_in *ipv4;
1140 struct sockaddr_in6 *ipv6;
1142 static char *ret = NULL;
1148 switch(arg->sa_family)
1151 UNIX = (struct sockaddr_un *)arg;
1152 ret = sprintf2("%s", UNIX->sun_path);
1155 ipv4 = (struct sockaddr_in *)arg;
1156 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1158 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1162 ipv6 = (struct sockaddr_in6 *)arg;
1163 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1165 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
1169 errno = EPFNOSUPPORT;
1178 * It was very nice to use this, but it seems
1179 * to mess things up, so I guess it has to go... :-(
1182 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1184 struct sockaddr *arg;
1186 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1187 * lowercase letters to 1, so I do this
1189 struct sockaddr_in *ipv4;
1192 arg = *(struct sockaddr **)(args[0]);
1193 arglen = *(socklen_t *)(args[1]);
1194 switch(arg->sa_family)
1197 UNIX = (struct sockaddr_un *)arg;
1198 ret = fprintf(stream, "%s", UNIX->sun_path);
1201 ipv4 = (struct sockaddr_in *)arg;
1202 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1206 errno = EPFNOSUPPORT;
1212 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1215 argtypes[0] = PA_POINTER;
1217 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1218 * be an int, so I guess this should be
1224 static int init(int hup)
1229 if(register_printf_function('N', formataddress, formataddress_arginfo))
1231 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1239 static void terminate(void)
1241 while(sockets != NULL)
1242 unlinksock(sockets);
1245 static struct module me =
1253 .terminate = terminate