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));
99 if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
101 conf.ifc_buf = smalloc(conf.ifc_len = 65536);
102 if(ioctl(sock, SIOCGIFCONF, &conf) < 0)
108 bufend = ((char *)conf.ifc_buf) + conf.ifc_len;
110 for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++)
112 if(strcmp(ifr->ifr_name, pif))
114 memset(&req, 0, sizeof(req));
115 memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
116 if(ioctl(sock, SIOCGIFFLAGS, &req) < 0)
118 if(!(req.ifr_flags & IFF_UP))
120 flog(LOG_WARNING, "public interface is down");
123 if(ifr->ifr_addr.sa_family != AF_INET)
125 flog(LOG_WARNING, "address of the public interface is not AF_INET");
128 ipv4 = smalloc(sizeof(*ipv4));
129 memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr));
136 *addr = (struct sockaddr *)ipv4;
137 *lenbuf = sizeof(*ipv4);
146 static struct socket *newsock(int type)
150 new = smalloc(sizeof(*new));
153 new->isrealsocket = 1;
165 new->outbuf.s.buf = NULL;
166 new->outbuf.s.bufsize = 0;
167 new->outbuf.s.datasize = 0;
168 new->inbuf.s.buf = NULL;
169 new->inbuf.s.bufsize = 0;
170 new->inbuf.s.datasize = 0;
173 new->outbuf.d.f = new->outbuf.d.l = NULL;
174 new->inbuf.d.f = new->inbuf.d.l = NULL;
177 CBCHAININIT(new, socket_conn);
178 CBCHAININIT(new, socket_err);
179 CBCHAININIT(new, socket_read);
180 CBCHAININIT(new, socket_write);
181 CBCHAININIT(new, socket_accept);
191 static struct socket *mksock(int domain, int type)
196 if((fd = socket(domain, type, 0)) < 0)
198 flog(LOG_CRIT, "could not create socket: %s", strerror(errno));
203 new->family = domain;
204 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
208 struct socket *wrapsock(int fd)
212 new = newsock(SOCK_STREAM);
214 new->state = SOCK_EST;
215 new->isrealsocket = 0;
216 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
220 static void unlinksock(struct socket *sk)
223 sk->prev->next = sk->next;
225 sk->next->prev = sk->prev;
232 void getsock(struct socket *sk)
237 void putsock(struct socket *sk)
239 struct dgrambuf *buf;
241 if(--(sk->refcount) == 0)
243 CBCHAINFREE(sk, socket_conn);
244 CBCHAINFREE(sk, socket_err);
245 CBCHAINFREE(sk, socket_read);
246 CBCHAINFREE(sk, socket_write);
247 CBCHAINFREE(sk, socket_accept);
251 if(sk->outbuf.s.buf != NULL)
252 free(sk->outbuf.s.buf);
253 if(sk->inbuf.s.buf != NULL)
254 free(sk->inbuf.s.buf);
257 while((buf = sk->outbuf.d.f) != NULL)
259 sk->outbuf.d.f = buf->next;
264 while((buf = sk->inbuf.d.f) != NULL)
266 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 CBCHAINDOCB(sk, socket_err, sk, errno);
366 CBCHAINDOCB(sk, socket_err, sk, 0);
370 sk->inbuf.s.datasize += ret;
371 CBCHAINDOCB(sk, socket_read, sk);
374 if(ioctl(sk->fd, SIOCINQ, &inq))
376 /* I don't really know what could go wrong here, so let's
377 * assume it's transient. */
378 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
381 dbuf = smalloc(sizeof(*dbuf));
382 dbuf->data = smalloc(inq);
383 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
384 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
390 if((errno == EINTR) || (errno == EAGAIN))
392 CBCHAINDOCB(sk, socket_err, sk, errno);
396 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
397 * have EOF), but rather an empty packet. I don't know if any
398 * other potential DGRAM protocols might have an EOF
399 * condition, so let's play safe. */
405 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
407 CBCHAINDOCB(sk, socket_err, sk, 0);
412 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
413 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
415 if(sk->inbuf.d.l != NULL)
416 sk->inbuf.d.l->next = dbuf;
418 sk->inbuf.d.f = dbuf;
419 sk->inbuf.d.l = dbuf;
420 CBCHAINDOCB(sk, socket_read, sk);
425 static void sockflush(struct socket *sk)
428 struct dgrambuf *dbuf;
434 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
436 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
439 /* For now, assume transient error, since
440 * the socket is polled for errors */
445 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
446 CBCHAINDOCB(sk, socket_write, sk);
450 dbuf = sk->outbuf.d.f;
451 if((sk->outbuf.d.f = dbuf->next) == NULL)
452 sk->outbuf.d.l = NULL;
453 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
457 CBCHAINDOCB(sk, socket_write, sk);
462 void closesock(struct socket *sk)
464 sk->state = SOCK_STL;
470 void sockqueue(struct socket *sk, void *data, size_t size)
472 struct dgrambuf *new;
474 if(sk->state == SOCK_STL)
479 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
480 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
481 sk->outbuf.s.datasize += size;
484 if(sk->remote == NULL)
486 new = smalloc(sizeof(*new));
488 memcpy(new->data = smalloc(size), data, new->size = size);
489 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
490 if(sk->outbuf.d.l == NULL)
492 sk->outbuf.d.l = sk->outbuf.d.f = new;
494 sk->outbuf.d.l->next = new;
495 sk->outbuf.d.l = new;
501 size_t sockgetdatalen(struct socket *sk)
509 ret = sk->inbuf.s.datasize;
513 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
520 size_t sockqueuesize(struct socket *sk)
528 ret = sk->outbuf.s.datasize;
532 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
540 * The difference between netcslisten() and netcslistenlocal() is that
541 * netcslistenlocal() always listens on the local host, instead of
542 * following proxy/passive mode directions. It is suitable for eg. the
543 * UI channel, while the file sharing networks should, naturally, use
544 * netcslisten() instead.
547 struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, int (*func)(struct socket *, struct socket *, void *), void *data)
552 /* I don't know if this is actually correct (it probably isn't),
553 * but since, at on least Linux systems, PF_* are specifically
554 * #define'd to their AF_* counterparts, it allows for a severely
555 * smoother implementation. If it breaks something on your
556 * platform, please tell me so.
558 if((sk = mksock(name->sa_family, type)) == NULL)
560 sk->state = SOCK_LST;
561 if(confgetint("net", "reuseaddr"))
564 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
566 if(bind(sk->fd, name, namelen) < 0)
571 if(listen(sk->fd, 16) < 0)
577 CBREG(sk, socket_accept, func, NULL, data);
581 struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, int (*func)(struct socket *, struct socket *, void *), void *data)
583 if(confgetint("net", "mode") == 1)
588 if(confgetint("net", "mode") == 0)
589 return(netcslistenlocal(type, name, namelen, func, data));
594 struct socket *netcstcplisten(int port, int local, int (*func)(struct socket *, struct socket *, void *), void *data)
596 struct sockaddr_in addr;
598 struct sockaddr_in6 addr6;
600 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, int (*)(struct socket *, struct socket *, void *), void *);
604 csfunc = netcslistenlocal;
606 csfunc = netcslisten;
608 memset(&addr6, 0, sizeof(addr6));
609 addr6.sin6_family = AF_INET6;
610 addr6.sin6_port = htons(port);
611 addr6.sin6_addr = in6addr_any;
612 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
614 if((ret == NULL) && (errno != EAFNOSUPPORT))
617 memset(&addr, 0, sizeof(addr));
618 addr.sin_family = AF_INET;
619 addr.sin_port = htons(port);
620 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
623 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
628 mode = confgetint("net", "mode");
629 if((mode == 0) || (mode == 1))
631 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
633 if(bind(sk->fd, name, namelen) < 0)
638 sk->state = SOCK_EST;
645 struct socket *netdupsock(struct socket *sk)
647 struct socket *newsk;
649 newsk = newsock(sk->type);
650 if((newsk->fd = dup(sk->fd)) < 0)
652 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
656 newsk->state = sk->state;
657 newsk->ignread = sk->ignread;
658 if(sk->remote != NULL)
659 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
663 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
665 if(sk->remote != NULL)
667 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
671 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, int (*func)(struct socket *, int, void *), void *data)
676 mode = confgetint("net", "mode");
677 if((mode == 0) || (mode == 1))
679 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
681 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
682 if(!connect(sk->fd, addr, addrlen))
684 sk->state = SOCK_EST;
688 if(errno == EINPROGRESS)
690 sk->state = SOCK_SYN;
692 CBREG(sk, socket_conn, func, NULL, data);
702 int pollsocks(int timeout)
708 struct socket *sk, *next, *newsk;
709 struct sockaddr_storage ss;
712 pfds = smalloc(sizeof(*pfds) * (num = numsocks));
713 for(i = 0, sk = sockets; i < num; sk = sk->next)
715 if(sk->state == SOCK_STL)
723 pfds[i].events |= POLLIN;
724 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
725 pfds[i].events |= POLLOUT;
729 ret = poll(pfds, num, timeout);
734 flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno));
735 /* To avoid CPU hogging in case it's bad, which it
742 for(sk = sockets; sk != NULL; sk = next)
745 for(i = 0; i < num; i++)
747 if(pfds[i].fd == sk->fd)
755 if(pfds[i].revents & POLLIN)
758 if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0)
759 CBCHAINDOCB(sk, socket_err, sk, errno);
760 newsk = newsock(sk->type);
762 newsk->family = sk->family;
763 newsk->state = SOCK_EST;
764 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
765 newsk->remotelen = sslen;
767 CBCHAINDOCB(sk, socket_accept, sk, newsk);
769 if(pfds[i].revents & POLLERR)
771 retlen = sizeof(ret);
772 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
773 CBCHAINDOCB(sk, socket_err, sk, ret);
778 if(pfds[i].revents & POLLERR)
780 retlen = sizeof(ret);
781 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
782 CBCHAINDOCB(sk, socket_conn, sk, ret);
786 if(pfds[i].revents & (POLLIN | POLLOUT))
788 sk->state = SOCK_EST;
789 CBCHAINDOCB(sk, socket_conn, sk, 0);
793 if(pfds[i].revents & POLLERR)
795 retlen = sizeof(ret);
796 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
797 CBCHAINDOCB(sk, socket_err, sk, ret);
801 if(pfds[i].revents & POLLIN)
803 if(pfds[i].revents & POLLOUT)
805 if(sockqueuesize(sk) > 0)
810 if(pfds[i].revents & POLLNVAL)
812 flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd);
813 sk->state = SOCK_STL;
817 if(pfds[i].revents & POLLHUP)
819 CBCHAINDOCB(sk, socket_err, sk, 0);
826 for(sk = sockets; sk != NULL; sk = next)
829 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
834 if(sk->close && (sockqueuesize(sk) == 0))
836 if(sk->state == SOCK_STL)
845 int socksettos(struct socket *sk, int tos)
849 if(sk->family == AF_INET)
856 case SOCK_TOS_MINCOST:
859 case SOCK_TOS_MAXREL:
865 case SOCK_TOS_MINDELAY:
869 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
872 if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0)
874 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
879 if(sk->family == AF_INET6)
885 case SOCK_TOS_MINCOST:
886 buf = confgetint("net", "diffserv-mincost");
888 case SOCK_TOS_MAXREL:
889 buf = confgetint("net", "diffserv-maxrel");
892 buf = confgetint("net", "diffserv-maxtp");
894 case SOCK_TOS_MINDELAY:
895 buf = confgetint("net", "diffserv-mindelay");
898 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
902 On Linux, the API IPv6 flow label management doesn't seem to
903 be entirely complete, so I guess this will have to wait.
905 if(setsockopt(...) < 0)
907 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
913 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
920 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
922 struct sockaddr_storage addr;
926 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
930 struct sockaddr_in *ipv4;
934 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
937 data->callback(NULL, 0, data->data);
939 ipv4 = (struct sockaddr_in *)&data->addr;
940 memcpy(&ipv4->sin_addr, buf, 4);
941 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
945 data->callback(NULL, 0, data->data);
951 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
958 struct resolvedata *rdata;
959 struct sockaddr_in ipv4;
965 if((p = strchr(addr, ':')) != NULL)
970 ipv4.sin_family = AF_INET;
971 ipv4.sin_port = htons(port);
972 if(inet_aton(addr, &ipv4.sin_addr))
974 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
976 sigemptyset(&sigset);
977 sigaddset(&sigset, SIGCHLD);
978 sigprocmask(SIG_BLOCK, &sigset, NULL);
979 if((pipe(pfd) < 0) || ((child = fork()) < 0))
981 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
986 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
987 for(i = 3; i < FD_SETSIZE; i++)
992 signal(SIGALRM, SIG_DFL);
994 if((he = gethostbyname(addr)) == NULL)
996 write(pfd[1], he->h_addr_list[0], 4);
1000 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1001 rdata = smalloc(sizeof(*rdata));
1003 rdata->callback = callback;
1005 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1006 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1007 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1014 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1017 struct sockaddr_storage name;
1020 if((sk->state == SOCK_STL) || (sk->fd < 0))
1023 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1025 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno));
1028 *namebuf = memcpy(smalloc(len), &name, len);
1033 static void sethostaddr(struct sockaddr *dst, struct sockaddr *src)
1035 if(dst->sa_family != src->sa_family)
1037 flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family);
1040 switch(src->sa_family)
1043 ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr;
1046 ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr;
1049 flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family);
1054 static int makepublic(struct sockaddr *addr)
1058 struct sockaddr *pname;
1060 if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0)
1062 flog(LOG_ERR, "could not get public address: %s", strerror(errno));
1067 sethostaddr(addr, pname);
1072 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1075 struct sockaddr *name;
1077 switch(confgetint("net", "mode"))
1081 if((sk->state == SOCK_STL) || (sk->fd < 0))
1086 if(!sockgetlocalname(sk, &name, &len))
1093 flog(LOG_ERR, "could not get remotely accessible name by any means");
1099 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1105 int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf)
1107 struct sockaddr *name1, *name2;
1108 socklen_t len1, len2;
1110 if(sk->family != sk2->family)
1112 flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family);
1115 if(sockgetremotename(sk, &name1, &len1))
1117 if(sockgetremotename(sk2, &name2, &len2)) {
1121 sethostaddr(name1, name2);
1128 int addreq(struct sockaddr *x, struct sockaddr *y)
1130 struct sockaddr_un *u1, *u2;
1131 struct sockaddr_in *n1, *n2;
1133 struct sockaddr_in6 *s1, *s2;
1136 if(x->sa_family != y->sa_family)
1138 switch(x->sa_family) {
1140 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1141 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1145 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1146 if(n1->sin_port != n2->sin_port)
1148 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1153 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1154 if(s1->sin6_port != s2->sin6_port)
1156 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1164 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1166 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1167 * lowercase letters to 1, so I do this
1169 struct sockaddr_in *ipv4;
1171 struct sockaddr_in6 *ipv6;
1173 static char *ret = NULL;
1179 switch(arg->sa_family)
1182 UNIX = (struct sockaddr_un *)arg;
1183 ret = sprintf2("%s", UNIX->sun_path);
1186 ipv4 = (struct sockaddr_in *)arg;
1187 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1189 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1193 ipv6 = (struct sockaddr_in6 *)arg;
1194 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1196 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
1200 errno = EPFNOSUPPORT;
1209 * It was very nice to use this, but it seems
1210 * to mess things up, so I guess it has to go... :-(
1213 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1215 struct sockaddr *arg;
1217 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1218 * lowercase letters to 1, so I do this
1220 struct sockaddr_in *ipv4;
1223 arg = *(struct sockaddr **)(args[0]);
1224 arglen = *(socklen_t *)(args[1]);
1225 switch(arg->sa_family)
1228 UNIX = (struct sockaddr_un *)arg;
1229 ret = fprintf(stream, "%s", UNIX->sun_path);
1232 ipv4 = (struct sockaddr_in *)arg;
1233 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1237 errno = EPFNOSUPPORT;
1243 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1246 argtypes[0] = PA_POINTER;
1248 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1249 * be an int, so I guess this should be
1255 static int init(int hup)
1260 if(register_printf_function('N', formataddress, formataddress_arginfo))
1262 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1270 static void terminate(void)
1272 while(sockets != NULL)
1273 unlinksock(sockets);
1276 static struct module me =
1284 .terminate = terminate