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 /** The network mode to use. Currently supported values are 0 for
52 * active mode and 1 for passive mode. In the future, SOCKS5 proxy
53 * support may be added. */
54 {CONF_VAR_INT, "mode", {.num = 0}},
55 /** Set the SO_REUSEADDR socket option on listening sockets, so
56 * that dead TCP connections waiting for timeout are ignored. */
57 {CONF_VAR_BOOL, "reuseaddr", {.num = 0}},
58 /** Overrides the IPv4 address reported to other clients in active
59 * mode. Useful for servers behind NAT routers. If both this and
60 * net.publicif are unspecified the address of the hub connection
62 {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}},
63 /** Specifies an interface name from which to fetch the IPv4
64 * address reported to other clients in active mode. If both this
65 * and net.visibleipv4 are unspecified the address of the hub
66 * connection is used. */
67 {CONF_VAR_STRING, "publicif", {.str = L""}},
68 /* Diffserv should be supported on IPv4, too, but I don't know the
70 /** The Diffserv value to use on IPv6 connections when the
71 * minimize cost TOS value is used (see the TOS VALUES
73 {CONF_VAR_INT, "diffserv-mincost", {.num = 0}},
74 /** The Diffserv value to use on IPv6 connections when the
75 * maximize reliability TOS value is used (see the TOS VALUES
77 {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}},
78 /** The Diffserv value to use on IPv6 connections when the
79 * maximize throughput TOS value is used (see the TOS VALUES
81 {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}},
82 /** The Diffserv value to use on IPv6 connections when the
83 * minimize delay TOS value is used (see the TOS VALUES
85 {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}},
89 static struct socket *sockets = NULL;
92 /* XXX: Get autoconf for all this... */
93 int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf)
95 struct sockaddr_in *ipv4;
96 struct configvar *var;
100 struct ifreq *ifr, req;
105 var = confgetvar("net", "visibleipv4");
106 if(var->val.ipv4.s_addr != 0)
108 ipv4 = smalloc(sizeof(*ipv4));
109 ipv4->sin_family = AF_INET;
110 ipv4->sin_addr.s_addr = var->val.ipv4.s_addr;
111 *addr = (struct sockaddr *)ipv4;
112 *lenbuf = sizeof(*ipv4);
115 if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL)
117 flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno));
122 if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
124 conf.ifc_buf = smalloc(conf.ifc_len = 65536);
125 if(ioctl(sock, SIOCGIFCONF, &conf) < 0)
131 bufend = ((char *)conf.ifc_buf) + conf.ifc_len;
133 for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++)
135 if(strcmp(ifr->ifr_name, pif))
137 memset(&req, 0, sizeof(req));
138 memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
139 if(ioctl(sock, SIOCGIFFLAGS, &req) < 0)
141 if(!(req.ifr_flags & IFF_UP))
143 flog(LOG_WARNING, "public interface is down");
146 if(ifr->ifr_addr.sa_family != AF_INET)
148 flog(LOG_WARNING, "address of the public interface is not AF_INET");
151 ipv4 = smalloc(sizeof(*ipv4));
152 memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr));
159 *addr = (struct sockaddr *)ipv4;
160 *lenbuf = sizeof(*ipv4);
169 static struct socket *newsock(int type)
173 new = smalloc(sizeof(*new));
176 new->isrealsocket = 1;
188 new->outbuf.s.buf = NULL;
189 new->outbuf.s.bufsize = 0;
190 new->outbuf.s.datasize = 0;
191 new->inbuf.s.buf = NULL;
192 new->inbuf.s.bufsize = 0;
193 new->inbuf.s.datasize = 0;
196 new->outbuf.d.f = new->outbuf.d.l = NULL;
197 new->inbuf.d.f = new->inbuf.d.l = NULL;
204 new->acceptcb = NULL;
214 static struct socket *mksock(int domain, int type)
219 if((fd = socket(domain, type, 0)) < 0)
221 flog(LOG_CRIT, "could not create socket: %s", strerror(errno));
226 new->family = domain;
227 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
231 struct socket *wrapsock(int fd)
235 new = newsock(SOCK_STREAM);
237 new->state = SOCK_EST;
238 new->isrealsocket = 0;
239 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
243 static void unlinksock(struct socket *sk)
246 sk->prev->next = sk->next;
248 sk->next->prev = sk->prev;
255 void getsock(struct socket *sk)
260 void putsock(struct socket *sk)
262 struct dgrambuf *buf;
264 if(--(sk->refcount) == 0)
269 if(sk->outbuf.s.buf != NULL)
270 free(sk->outbuf.s.buf);
271 if(sk->inbuf.s.buf != NULL)
272 free(sk->inbuf.s.buf);
275 while((buf = sk->outbuf.d.f) != NULL)
277 sk->outbuf.d.f = buf->next;
282 while((buf = sk->inbuf.d.f) != NULL)
284 sk->inbuf.d.f = buf->next;
293 if(sk->remote != NULL)
299 void sockpushdata(struct socket *sk, void *buf, size_t size)
304 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1);
305 memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize);
306 memcpy(sk->inbuf.s.buf, buf, size);
307 sk->inbuf.s.datasize += size;
316 void *sockgetinbuf(struct socket *sk, size_t *size)
319 struct dgrambuf *dbuf;
324 if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0))
329 buf = sk->inbuf.s.buf;
330 *size = sk->inbuf.s.datasize;
331 sk->inbuf.s.buf = NULL;
332 sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0;
335 if((dbuf = sk->inbuf.d.f) == NULL)
337 sk->inbuf.d.f = dbuf->next;
338 if(dbuf->next == NULL)
339 sk->inbuf.d.l = NULL;
349 static void sockrecv(struct socket *sk)
352 struct dgrambuf *dbuf;
357 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
358 /* SIOCINQ is Linux-specific AFAIK, but I really have no idea
359 * how to read the inqueue size on other OSs */
360 if(ioctl(sk->fd, SIOCINQ, &inq))
362 /* I don't really know what could go wrong here, so let's
363 * assume it's transient. */
364 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
372 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
373 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
376 if((errno == EINTR) || (errno == EAGAIN))
378 if(sk->errcb != NULL)
379 sk->errcb(sk, errno, sk->data);
385 if(sk->errcb != NULL)
386 sk->errcb(sk, 0, sk->data);
390 sk->inbuf.s.datasize += ret;
391 if(sk->readcb != NULL)
392 sk->readcb(sk, sk->data);
395 if(ioctl(sk->fd, SIOCINQ, &inq))
397 /* I don't really know what could go wrong here, so let's
398 * assume it's transient. */
399 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
402 dbuf = smalloc(sizeof(*dbuf));
403 dbuf->data = smalloc(inq);
404 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
405 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
411 if((errno == EINTR) || (errno == EAGAIN))
413 if(sk->errcb != NULL)
414 sk->errcb(sk, errno, sk->data);
418 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
419 * have EOF), but rather an empty packet. I don't know if any
420 * other potential DGRAM protocols might have an EOF
421 * condition, so let's play safe. */
427 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
429 if(sk->errcb != NULL)
430 sk->errcb(sk, 0, sk->data);
435 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
436 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
438 if(sk->inbuf.d.l != NULL)
439 sk->inbuf.d.l->next = dbuf;
441 sk->inbuf.d.f = dbuf;
442 sk->inbuf.d.l = dbuf;
443 if(sk->readcb != NULL)
444 sk->readcb(sk, sk->data);
449 static void sockflush(struct socket *sk)
452 struct dgrambuf *dbuf;
458 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
460 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
463 /* For now, assume transient error, since
464 * the socket is polled for errors */
469 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
470 if(sk->writecb != NULL)
471 sk->writecb(sk, sk->data);
475 dbuf = sk->outbuf.d.f;
476 if((sk->outbuf.d.f = dbuf->next) == NULL)
477 sk->outbuf.d.l = NULL;
478 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
482 if(sk->writecb != NULL)
483 sk->writecb(sk, sk->data);
488 void closesock(struct socket *sk)
490 sk->state = SOCK_STL;
496 void sockqueue(struct socket *sk, void *data, size_t size)
498 struct dgrambuf *new;
500 if(sk->state == SOCK_STL)
505 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
506 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
507 sk->outbuf.s.datasize += size;
510 if(sk->remote == NULL)
512 new = smalloc(sizeof(*new));
514 memcpy(new->data = smalloc(size), data, new->size = size);
515 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
516 if(sk->outbuf.d.l == NULL)
518 sk->outbuf.d.l = sk->outbuf.d.f = new;
520 sk->outbuf.d.l->next = new;
521 sk->outbuf.d.l = new;
527 size_t sockgetdatalen(struct socket *sk)
535 ret = sk->inbuf.s.datasize;
539 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
546 size_t sockqueuesize(struct socket *sk)
554 ret = sk->outbuf.s.datasize;
558 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
566 * The difference between netcslisten() and netcslistenlocal() is that
567 * netcslistenlocal() always listens on the local host, instead of
568 * following proxy/passive mode directions. It is suitable for eg. the
569 * UI channel, while the file sharing networks should, naturally, use
570 * netcslisten() instead.
573 struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
578 /* I don't know if this is actually correct (it probably isn't),
579 * but since, at on least Linux systems, PF_* are specifically
580 * #define'd to their AF_* counterparts, it allows for a severely
581 * smoother implementation. If it breaks something on your
582 * platform, please tell me so.
584 if((sk = mksock(name->sa_family, type)) == NULL)
586 sk->state = SOCK_LST;
587 if(confgetint("net", "reuseaddr"))
590 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
592 if(bind(sk->fd, name, namelen) < 0)
597 if(listen(sk->fd, 16) < 0)
607 struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
609 if(confgetint("net", "mode") == 1)
614 if(confgetint("net", "mode") == 0)
615 return(netcslistenlocal(type, name, namelen, func, data));
620 struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
622 struct sockaddr_in addr;
624 struct sockaddr_in6 addr6;
626 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
630 csfunc = netcslistenlocal;
632 csfunc = netcslisten;
634 memset(&addr6, 0, sizeof(addr6));
635 addr6.sin6_family = AF_INET6;
636 addr6.sin6_port = htons(port);
637 addr6.sin6_addr = in6addr_any;
638 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
640 if((ret == NULL) && (errno != EAFNOSUPPORT))
643 memset(&addr, 0, sizeof(addr));
644 addr.sin_family = AF_INET;
645 addr.sin_port = htons(port);
646 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
649 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
654 mode = confgetint("net", "mode");
655 if((mode == 0) || (mode == 1))
657 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
659 if(bind(sk->fd, name, namelen) < 0)
664 sk->state = SOCK_EST;
671 struct socket *netdupsock(struct socket *sk)
673 struct socket *newsk;
675 newsk = newsock(sk->type);
676 if((newsk->fd = dup(sk->fd)) < 0)
678 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
682 newsk->state = sk->state;
683 newsk->ignread = sk->ignread;
684 if(sk->remote != NULL)
685 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
689 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
691 if(sk->remote != NULL)
693 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
697 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
702 mode = confgetint("net", "mode");
703 if((mode == 0) || (mode == 1))
705 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
707 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
708 if(!connect(sk->fd, addr, addrlen))
710 sk->state = SOCK_EST;
714 if(errno == EINPROGRESS)
716 sk->state = SOCK_SYN;
728 int pollsocks(int timeout)
734 struct socket *sk, *next, *newsk;
735 struct sockaddr_storage ss;
738 pfds = smalloc(sizeof(*pfds) * (num = numsocks));
739 for(i = 0, sk = sockets; i < num; sk = sk->next)
741 if(sk->state == SOCK_STL)
749 pfds[i].events |= POLLIN;
750 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
751 pfds[i].events |= POLLOUT;
755 ret = poll(pfds, num, timeout);
760 flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno));
761 /* To avoid CPU hogging in case it's bad, which it
768 for(sk = sockets; sk != NULL; sk = next)
771 for(i = 0; i < num; i++)
773 if(pfds[i].fd == sk->fd)
781 if(pfds[i].revents & POLLIN)
784 if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0)
786 if(sk->errcb != NULL)
787 sk->errcb(sk, errno, sk->data);
789 newsk = newsock(sk->type);
791 newsk->family = sk->family;
792 newsk->state = SOCK_EST;
793 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
794 newsk->remotelen = sslen;
796 if(sk->acceptcb != NULL)
797 sk->acceptcb(sk, newsk, sk->data);
799 if(pfds[i].revents & POLLERR)
801 retlen = sizeof(ret);
802 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
803 if(sk->errcb != NULL)
804 sk->errcb(sk, ret, sk->data);
809 if(pfds[i].revents & POLLERR)
811 retlen = sizeof(ret);
812 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
813 if(sk->conncb != NULL)
814 sk->conncb(sk, ret, sk->data);
818 if(pfds[i].revents & (POLLIN | POLLOUT))
820 sk->state = SOCK_EST;
821 if(sk->conncb != NULL)
822 sk->conncb(sk, 0, sk->data);
826 if(pfds[i].revents & POLLERR)
828 retlen = sizeof(ret);
829 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
830 if(sk->errcb != NULL)
831 sk->errcb(sk, ret, sk->data);
835 if(pfds[i].revents & POLLIN)
837 if(pfds[i].revents & POLLOUT)
839 if(sockqueuesize(sk) > 0)
844 if(pfds[i].revents & POLLNVAL)
846 flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd);
847 sk->state = SOCK_STL;
851 if(pfds[i].revents & POLLHUP)
853 if(sk->errcb != NULL)
854 sk->errcb(sk, 0, sk->data);
861 for(sk = sockets; sk != NULL; sk = next)
864 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
869 if(sk->close && (sockqueuesize(sk) == 0))
871 if(sk->state == SOCK_STL)
880 int socksettos(struct socket *sk, int tos)
884 if(sk->family == AF_INET)
891 case SOCK_TOS_MINCOST:
894 case SOCK_TOS_MAXREL:
900 case SOCK_TOS_MINDELAY:
904 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
907 if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0)
909 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
914 if(sk->family == AF_INET6)
920 case SOCK_TOS_MINCOST:
921 buf = confgetint("net", "diffserv-mincost");
923 case SOCK_TOS_MAXREL:
924 buf = confgetint("net", "diffserv-maxrel");
927 buf = confgetint("net", "diffserv-maxtp");
929 case SOCK_TOS_MINDELAY:
930 buf = confgetint("net", "diffserv-mindelay");
933 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
937 On Linux, the API IPv6 flow label management doesn't seem to
938 be entirely complete, so I guess this will have to wait.
940 if(setsockopt(...) < 0)
942 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
948 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
955 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
957 struct sockaddr_storage addr;
961 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
965 struct sockaddr_in *ipv4;
969 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
972 data->callback(NULL, 0, data->data);
974 ipv4 = (struct sockaddr_in *)&data->addr;
975 memcpy(&ipv4->sin_addr, buf, 4);
976 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
980 data->callback(NULL, 0, data->data);
986 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
993 struct resolvedata *rdata;
994 struct sockaddr_in ipv4;
1000 if((p = strchr(addr, ':')) != NULL)
1005 ipv4.sin_family = AF_INET;
1006 ipv4.sin_port = htons(port);
1007 if(inet_aton(addr, &ipv4.sin_addr))
1009 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
1011 sigemptyset(&sigset);
1012 sigaddset(&sigset, SIGCHLD);
1013 sigprocmask(SIG_BLOCK, &sigset, NULL);
1014 if((pipe(pfd) < 0) || ((child = fork()) < 0))
1016 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1021 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1022 for(i = 3; i < FD_SETSIZE; i++)
1027 signal(SIGALRM, SIG_DFL);
1029 if((he = gethostbyname(addr)) == NULL)
1031 write(pfd[1], he->h_addr_list[0], 4);
1035 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1036 rdata = smalloc(sizeof(*rdata));
1038 rdata->callback = callback;
1040 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1041 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1042 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1049 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1052 struct sockaddr_storage name;
1055 if((sk->state == SOCK_STL) || (sk->fd < 0))
1058 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1060 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno));
1063 *namebuf = memcpy(smalloc(len), &name, len);
1068 static void sethostaddr(struct sockaddr *dst, struct sockaddr *src)
1070 if(dst->sa_family != src->sa_family)
1072 flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family);
1075 switch(src->sa_family)
1078 ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr;
1081 ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr;
1084 flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family);
1089 static int makepublic(struct sockaddr *addr)
1093 struct sockaddr *pname;
1095 if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0)
1097 flog(LOG_ERR, "could not get public address: %s", strerror(errno));
1102 sethostaddr(addr, pname);
1107 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1110 struct sockaddr *name;
1112 switch(confgetint("net", "mode"))
1116 if((sk->state == SOCK_STL) || (sk->fd < 0))
1121 if(!sockgetlocalname(sk, &name, &len))
1128 flog(LOG_ERR, "could not get remotely accessible name by any means");
1134 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1140 int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf)
1142 struct sockaddr *name1, *name2;
1143 socklen_t len1, len2;
1145 if(sk->family != sk2->family)
1147 flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family);
1150 if(sockgetremotename(sk, &name1, &len1))
1152 if(sockgetremotename(sk2, &name2, &len2)) {
1156 sethostaddr(name1, name2);
1163 int addreq(struct sockaddr *x, struct sockaddr *y)
1165 struct sockaddr_un *u1, *u2;
1166 struct sockaddr_in *n1, *n2;
1168 struct sockaddr_in6 *s1, *s2;
1171 if(x->sa_family != y->sa_family)
1173 switch(x->sa_family) {
1175 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1176 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1180 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1181 if(n1->sin_port != n2->sin_port)
1183 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1188 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1189 if(s1->sin6_port != s2->sin6_port)
1191 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1199 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1201 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1202 * lowercase letters to 1, so I do this
1204 struct sockaddr_in *ipv4;
1206 struct sockaddr_in6 *ipv6;
1208 static char *ret = NULL;
1214 switch(arg->sa_family)
1217 UNIX = (struct sockaddr_un *)arg;
1218 ret = sprintf2("%s", UNIX->sun_path);
1221 ipv4 = (struct sockaddr_in *)arg;
1222 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1224 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1228 ipv6 = (struct sockaddr_in6 *)arg;
1229 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1231 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
1235 errno = EPFNOSUPPORT;
1244 * It was very nice to use this, but it seems
1245 * to mess things up, so I guess it has to go... :-(
1248 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1250 struct sockaddr *arg;
1252 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1253 * lowercase letters to 1, so I do this
1255 struct sockaddr_in *ipv4;
1258 arg = *(struct sockaddr **)(args[0]);
1259 arglen = *(socklen_t *)(args[1]);
1260 switch(arg->sa_family)
1263 UNIX = (struct sockaddr_un *)arg;
1264 ret = fprintf(stream, "%s", UNIX->sun_path);
1267 ipv4 = (struct sockaddr_in *)arg;
1268 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1272 errno = EPFNOSUPPORT;
1278 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1281 argtypes[0] = PA_POINTER;
1283 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1284 * be an int, so I guess this should be
1290 static int init(int hup)
1295 if(register_printf_function('N', formataddress, formataddress_arginfo))
1297 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1305 static void terminate(void)
1307 while(sockets != NULL)
1308 unlinksock(sockets);
1311 static struct module me =
1319 .terminate = terminate