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""}},
61 static struct socket *sockets = NULL;
64 /* XXX: Get autoconf for all this... */
65 int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf)
67 struct sockaddr_in *ipv4;
68 struct configvar *var;
72 struct ifreq *ifr, req;
77 var = confgetvar("net", "visibleipv4");
78 if(var->val.ipv4.s_addr != 0)
80 ipv4 = smalloc(sizeof(*ipv4));
81 ipv4->sin_family = AF_INET;
82 ipv4->sin_addr.s_addr = var->val.ipv4.s_addr;
83 *addr = (struct sockaddr *)ipv4;
84 *lenbuf = sizeof(*ipv4);
87 if((pif = icwcstombs(confgetstr("net", "publicif"), NULL)) == NULL)
89 flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno));
92 if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
94 conf.ifc_buf = smalloc(conf.ifc_len = 65536);
95 if(ioctl(sock, SIOCGIFCONF, &conf) < 0)
101 bufend = ((char *)conf.ifc_buf) + conf.ifc_len;
103 for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++)
105 memset(&req, 0, sizeof(req));
106 memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
107 if(ioctl(sock, SIOCGIFFLAGS, &req) < 0)
113 if(!(req.ifr_flags & IFF_UP))
115 if(ifr->ifr_addr.sa_family == AF_INET)
117 if(ntohl(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr.s_addr) == 0x7f000001)
121 ipv4 = smalloc(sizeof(*ipv4));
122 memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr));
125 flog(LOG_WARNING, "could not locate an unambiguous interface for determining your public IP address - set net.publicif");
126 errno = ENFILE; /* XXX: There's no appropriate one for this... */
134 *addr = (struct sockaddr *)ipv4;
135 *lenbuf = sizeof(*ipv4);
141 errno = EPFNOSUPPORT;
145 static struct socket *newsock(int type)
149 new = smalloc(sizeof(*new));
152 new->isrealsocket = 1;
164 new->outbuf.s.buf = NULL;
165 new->outbuf.s.bufsize = 0;
166 new->outbuf.s.datasize = 0;
167 new->inbuf.s.buf = NULL;
168 new->inbuf.s.bufsize = 0;
169 new->inbuf.s.datasize = 0;
172 new->outbuf.d.f = new->outbuf.d.l = NULL;
173 new->inbuf.d.f = new->inbuf.d.l = NULL;
180 new->acceptcb = NULL;
190 static struct socket *mksock(int domain, int type)
195 if((fd = socket(domain, type, 0)) < 0)
197 flog(LOG_CRIT, "could not create socket: %s", strerror(errno));
202 new->family = domain;
203 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
207 struct socket *wrapsock(int fd)
211 new = newsock(SOCK_STREAM);
213 new->state = SOCK_EST;
214 new->isrealsocket = 0;
215 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
219 static void unlinksock(struct socket *sk)
222 sk->prev->next = sk->next;
224 sk->next->prev = sk->prev;
231 void getsock(struct socket *sk)
236 void putsock(struct socket *sk)
238 struct dgrambuf *buf;
240 if(--(sk->refcount) == 0)
245 if(sk->outbuf.s.buf != NULL)
246 free(sk->outbuf.s.buf);
247 if(sk->inbuf.s.buf != NULL)
248 free(sk->inbuf.s.buf);
251 while((buf = sk->outbuf.d.f) != NULL)
253 sk->outbuf.d.f = buf->next;
257 while((buf = sk->inbuf.d.f) != NULL)
259 sk->inbuf.d.f = buf->next;
267 if(sk->remote != NULL)
273 void *sockgetinbuf(struct socket *sk, size_t *size)
276 struct dgrambuf *dbuf;
281 if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0))
286 buf = sk->inbuf.s.buf;
287 *size = sk->inbuf.s.datasize;
288 sk->inbuf.s.buf = NULL;
289 sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0;
292 if((dbuf = sk->inbuf.d.f) == NULL)
294 sk->inbuf.d.f = dbuf->next;
295 if(dbuf->next == NULL)
296 sk->inbuf.d.l = NULL;
306 static void sockrecv(struct socket *sk)
309 struct dgrambuf *dbuf;
314 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
315 /* SIOCINQ is Linux-specific AFAIK, but I really have no idea
316 * how to read the inqueue size on other OSs */
317 if(ioctl(sk->fd, SIOCINQ, &inq))
319 /* I don't really know what could go wrong here, so let's
320 * assume it's transient. */
321 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
329 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
330 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
333 if((errno == EINTR) || (errno == EAGAIN))
335 if(sk->errcb != NULL)
336 sk->errcb(sk, errno, sk->data);
342 if(sk->errcb != NULL)
343 sk->errcb(sk, 0, sk->data);
347 sk->inbuf.s.datasize += ret;
348 if(sk->readcb != NULL)
349 sk->readcb(sk, sk->data);
352 if(ioctl(sk->fd, SIOCINQ, &inq))
354 /* I don't really know what could go wrong here, so let's
355 * assume it's transient. */
356 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
359 dbuf = smalloc(sizeof(*dbuf));
360 dbuf->data = smalloc(inq);
361 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
362 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
368 if((errno == EINTR) || (errno == EAGAIN))
370 if(sk->errcb != NULL)
371 sk->errcb(sk, errno, sk->data);
375 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
376 * have EOF), but rather an empty packet. I don't know if any
377 * other potential DGRAM protocols might have an EOF
378 * condition, so let's play safe. */
384 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
386 if(sk->errcb != NULL)
387 sk->errcb(sk, 0, sk->data);
392 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
393 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
395 if(sk->inbuf.d.l != NULL)
396 sk->inbuf.d.l->next = dbuf;
398 sk->inbuf.d.f = dbuf;
399 sk->inbuf.d.l = dbuf;
400 if(sk->readcb != NULL)
401 sk->readcb(sk, sk->data);
406 static void sockflush(struct socket *sk)
409 struct dgrambuf *dbuf;
415 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
417 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
420 /* For now, assume transient error, since
421 * the socket is polled for errors */
426 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
427 if(sk->writecb != NULL)
428 sk->writecb(sk, sk->data);
432 dbuf = sk->outbuf.d.f;
433 if((sk->outbuf.d.f = dbuf->next) == NULL)
434 sk->outbuf.d.l = NULL;
435 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
439 if(sk->writecb != NULL)
440 sk->writecb(sk, sk->data);
445 void closesock(struct socket *sk)
447 sk->state = SOCK_STL;
453 void sockqueue(struct socket *sk, void *data, size_t size)
455 struct dgrambuf *new;
457 if(sk->state == SOCK_STL)
462 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
463 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
464 sk->outbuf.s.datasize += size;
467 if(sk->remote == NULL)
469 new = smalloc(sizeof(*new));
471 memcpy(new->data = smalloc(size), data, new->size = size);
472 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
473 if(sk->outbuf.d.l == NULL)
475 sk->outbuf.d.l = sk->outbuf.d.f = new;
477 sk->outbuf.d.l->next = new;
478 sk->outbuf.d.l = new;
484 size_t sockgetdatalen(struct socket *sk)
492 ret = sk->inbuf.s.datasize;
496 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
503 size_t sockqueuesize(struct socket *sk)
511 ret = sk->outbuf.s.datasize;
515 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
522 struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
527 if(confgetint("net", "mode") == 1)
532 /* I don't know if this is actually correct (it probably isn't),
533 * but since, at on least Linux systems, PF_* are specifically
534 * #define'd to their AF_* counterparts, it allows for a severely
535 * smoother implementation. If it breaks something on your
536 * platform, please tell me so.
538 if(confgetint("net", "mode") == 0)
540 if((sk = mksock(name->sa_family, type)) == NULL)
542 sk->state = SOCK_LST;
543 if(confgetint("net", "reuseaddr"))
546 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
548 if(bind(sk->fd, name, namelen) < 0)
553 if(listen(sk->fd, 16) < 0)
567 * The difference between netcslisten() and netcslistenlocal() is that
568 * netcslistenlocal() always listens on the local host, instead of
569 * following proxy/passive mode directions. It is suitable for eg. the
570 * UI channel, while the file sharing networks should, naturally, use
571 * netcslisten() instead.
574 struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
579 /* I don't know if this is actually correct (it probably isn't),
580 * but since, at on least Linux systems, PF_* are specifically
581 * #define'd to their AF_* counterparts, it allows for a severely
582 * smoother implementation. If it breaks something on your
583 * platform, please tell me so.
585 if((sk = mksock(name->sa_family, type)) == NULL)
587 sk->state = SOCK_LST;
588 if(confgetint("net", "reuseaddr"))
591 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
593 if(bind(sk->fd, name, namelen) < 0)
598 if(listen(sk->fd, 16) < 0)
608 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
613 mode = confgetint("net", "mode");
614 if((mode == 0) || (mode == 1))
616 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
618 if(bind(sk->fd, name, namelen) < 0)
623 sk->state = SOCK_EST;
630 struct socket *netdupsock(struct socket *sk)
632 struct socket *newsk;
634 newsk = newsock(sk->type);
635 if((newsk->fd = dup(sk->fd)) < 0)
637 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
641 newsk->state = sk->state;
642 newsk->ignread = sk->ignread;
643 if(sk->remote != NULL)
644 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
648 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
650 if(sk->remote != NULL)
652 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
656 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
661 mode = confgetint("net", "mode");
662 if((mode == 0) || (mode == 1))
664 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
666 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
667 if(!connect(sk->fd, addr, addrlen))
669 sk->state = SOCK_EST;
673 if(errno == EINPROGRESS)
675 sk->state = SOCK_SYN;
687 int pollsocks(int timeout)
689 int i, num, ret, retlen;
692 struct socket *sk, *next, *newsk;
693 struct sockaddr_storage ss;
696 pfds = smalloc(sizeof(*pfds) * (num = numsocks));
697 for(i = 0, sk = sockets; i < num; sk = sk->next)
699 if(sk->state == SOCK_STL)
707 pfds[i].events |= POLLIN;
708 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
709 pfds[i].events |= POLLOUT;
713 ret = poll(pfds, num, timeout);
718 flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno));
719 /* To avoid CPU hogging in case it's bad, which it
726 for(sk = sockets; sk != NULL; sk = next)
729 for(i = 0; i < num; i++)
731 if(pfds[i].fd == sk->fd)
739 if(pfds[i].revents & POLLIN)
742 if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0)
744 if(sk->errcb != NULL)
745 sk->errcb(sk, errno, sk->data);
747 newsk = newsock(sk->type);
749 newsk->family = sk->family;
750 newsk->state = SOCK_EST;
751 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
752 newsk->remotelen = sslen;
754 if(sk->acceptcb != NULL)
755 sk->acceptcb(sk, newsk, sk->data);
757 if(pfds[i].revents & POLLERR)
759 retlen = sizeof(ret);
760 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
761 if(sk->errcb != NULL)
762 sk->errcb(sk, ret, sk->data);
767 if(pfds[i].revents & POLLERR)
769 retlen = sizeof(ret);
770 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
771 if(sk->conncb != NULL)
772 sk->conncb(sk, ret, sk->data);
776 if(pfds[i].revents & (POLLIN | POLLOUT))
778 sk->state = SOCK_EST;
779 if(sk->conncb != NULL)
780 sk->conncb(sk, 0, sk->data);
784 if(pfds[i].revents & POLLERR)
786 retlen = sizeof(ret);
787 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
788 if(sk->errcb != NULL)
789 sk->errcb(sk, ret, sk->data);
793 if(pfds[i].revents & POLLIN)
795 if(pfds[i].revents & POLLOUT)
797 if(sockqueuesize(sk) > 0)
802 if(pfds[i].revents & POLLNVAL)
804 flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd);
805 sk->state = SOCK_STL;
809 if(pfds[i].revents & POLLHUP)
811 if(sk->errcb != NULL)
812 sk->errcb(sk, 0, sk->data);
819 for(sk = sockets; sk != NULL; sk = next)
822 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
827 if(sk->close && (sockqueuesize(sk) == 0))
829 if(sk->state == SOCK_STL)
838 int socksettos(struct socket *sk, int tos)
840 if(sk->family == AF_INET)
842 if(setsockopt(sk->fd, SOL_IP, IP_TOS, &tos, sizeof(tos)) < 0)
844 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
849 /* XXX: How does the IPv6 traffic class work? */
850 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
857 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
859 struct sockaddr_storage addr;
863 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
867 struct sockaddr_in *ipv4;
871 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
874 data->callback(NULL, 0, data->data);
876 ipv4 = (struct sockaddr_in *)&data->addr;
877 memcpy(&ipv4->sin_addr, buf, 4);
878 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
882 data->callback(NULL, 0, data->data);
888 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
895 struct resolvedata *rdata;
896 struct sockaddr_in ipv4;
902 if((p = strchr(addr, ':')) != NULL)
907 ipv4.sin_family = AF_INET;
908 ipv4.sin_port = htons(port);
909 if(inet_aton(addr, &ipv4.sin_addr))
911 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
913 sigemptyset(&sigset);
914 sigaddset(&sigset, SIGCHLD);
915 sigprocmask(SIG_BLOCK, &sigset, NULL);
916 if((pipe(pfd) < 0) || ((child = fork()) < 0))
918 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
923 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
924 for(i = 3; i < FD_SETSIZE; i++)
929 signal(SIGALRM, SIG_DFL);
931 if((he = gethostbyname(addr)) == NULL)
933 write(pfd[1], he->h_addr_list[0], 4);
937 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
938 rdata = smalloc(sizeof(*rdata));
940 rdata->callback = callback;
942 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
943 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
944 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
951 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
954 struct sockaddr_storage name;
957 if((sk->state == SOCK_STL) || (sk->fd < 0))
960 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
962 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname");
965 *namebuf = memcpy(smalloc(len), &name, len);
970 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
973 struct sockaddr_storage name;
974 struct sockaddr_in *ipv4;
975 struct sockaddr *pname;
978 switch(confgetint("net", "mode"))
982 if((sk->state == SOCK_STL) || (sk->fd < 0))
985 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
987 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetremotename");
990 if(name.ss_family == AF_INET)
992 ipv4 = (struct sockaddr_in *)&name;
993 if(getpublicaddr(AF_INET, &pname, &pnamelen) < 0)
995 flog(LOG_WARNING, "could not determine public IP address - strange things may happen");
998 ipv4->sin_addr.s_addr = ((struct sockaddr_in *)pname)->sin_addr.s_addr;
1001 *namebuf = memcpy(smalloc(len), &name, len);
1008 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1014 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1016 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1017 * lowercase letters to 1, so I do this
1019 struct sockaddr_in *ipv4;
1021 struct sockaddr_in6 *ipv6;
1023 static char *ret = NULL;
1029 switch(arg->sa_family)
1032 UNIX = (struct sockaddr_un *)arg;
1033 ret = sprintf2("%s", UNIX->sun_path);
1036 ipv4 = (struct sockaddr_in *)arg;
1037 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1039 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1043 ipv6 = (struct sockaddr_in6 *)arg;
1044 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1046 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv6->sin6_port));
1050 errno = EPFNOSUPPORT;
1059 * It was very nice to use this, but it seems
1060 * to mess things up, so I guess it has to go... :-(
1063 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1065 struct sockaddr *arg;
1067 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1068 * lowercase letters to 1, so I do this
1070 struct sockaddr_in *ipv4;
1073 arg = *(struct sockaddr **)(args[0]);
1074 arglen = *(socklen_t *)(args[1]);
1075 switch(arg->sa_family)
1078 UNIX = (struct sockaddr_un *)arg;
1079 ret = fprintf(stream, "%s", UNIX->sun_path);
1082 ipv4 = (struct sockaddr_in *)arg;
1083 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1087 errno = EPFNOSUPPORT;
1093 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1096 argtypes[0] = PA_POINTER;
1098 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1099 * be an int, so I guess this should be
1105 static int init(int hup)
1110 if(register_printf_function('N', formataddress, formataddress_arginfo))
1112 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1120 static void terminate(void)
1122 while(sockets != NULL)
1123 unlinksock(sockets);
1126 static struct module me =
1134 .terminate = terminate