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;
292 if(sk->remote != NULL)
298 void sockpushdata(struct socket *sk, void *buf, size_t size)
303 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1);
304 memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize);
305 memcpy(sk->inbuf.s.buf, buf, size);
306 sk->inbuf.s.datasize += size;
315 void *sockgetinbuf(struct socket *sk, size_t *size)
318 struct dgrambuf *dbuf;
323 if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0))
328 buf = sk->inbuf.s.buf;
329 *size = sk->inbuf.s.datasize;
330 sk->inbuf.s.buf = NULL;
331 sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0;
334 if((dbuf = sk->inbuf.d.f) == NULL)
336 sk->inbuf.d.f = dbuf->next;
337 if(dbuf->next == NULL)
338 sk->inbuf.d.l = NULL;
348 static void sockrecv(struct socket *sk)
351 struct dgrambuf *dbuf;
356 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
357 /* SIOCINQ is Linux-specific AFAIK, but I really have no idea
358 * how to read the inqueue size on other OSs */
359 if(ioctl(sk->fd, SIOCINQ, &inq))
361 /* I don't really know what could go wrong here, so let's
362 * assume it's transient. */
363 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
371 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
372 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
375 if((errno == EINTR) || (errno == EAGAIN))
377 if(sk->errcb != NULL)
378 sk->errcb(sk, errno, sk->data);
384 if(sk->errcb != NULL)
385 sk->errcb(sk, 0, sk->data);
389 sk->inbuf.s.datasize += ret;
390 if(sk->readcb != NULL)
391 sk->readcb(sk, sk->data);
394 if(ioctl(sk->fd, SIOCINQ, &inq))
396 /* I don't really know what could go wrong here, so let's
397 * assume it's transient. */
398 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
401 dbuf = smalloc(sizeof(*dbuf));
402 dbuf->data = smalloc(inq);
403 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
404 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
410 if((errno == EINTR) || (errno == EAGAIN))
412 if(sk->errcb != NULL)
413 sk->errcb(sk, errno, sk->data);
417 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
418 * have EOF), but rather an empty packet. I don't know if any
419 * other potential DGRAM protocols might have an EOF
420 * condition, so let's play safe. */
426 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
428 if(sk->errcb != NULL)
429 sk->errcb(sk, 0, sk->data);
434 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
435 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
437 if(sk->inbuf.d.l != NULL)
438 sk->inbuf.d.l->next = dbuf;
440 sk->inbuf.d.f = dbuf;
441 sk->inbuf.d.l = dbuf;
442 if(sk->readcb != NULL)
443 sk->readcb(sk, sk->data);
448 static void sockflush(struct socket *sk)
451 struct dgrambuf *dbuf;
457 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
459 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
462 /* For now, assume transient error, since
463 * the socket is polled for errors */
468 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
469 if(sk->writecb != NULL)
470 sk->writecb(sk, sk->data);
474 dbuf = sk->outbuf.d.f;
475 if((sk->outbuf.d.f = dbuf->next) == NULL)
476 sk->outbuf.d.l = NULL;
477 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
481 if(sk->writecb != NULL)
482 sk->writecb(sk, sk->data);
487 void closesock(struct socket *sk)
489 struct sockaddr_un *un;
491 if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)&un, NULL) && (un->sun_family == PF_UNIX))
493 if(strchr(un->sun_path, '/'))
495 if(unlink(un->sun_path))
496 flog(LOG_WARNING, "could not unlink UNIX socket %s: %s", un->sun_path, strerror(errno));
499 sk->state = SOCK_STL;
505 void sockqueue(struct socket *sk, void *data, size_t size)
507 struct dgrambuf *new;
509 if(sk->state == SOCK_STL)
514 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
515 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
516 sk->outbuf.s.datasize += size;
519 if(sk->remote == NULL)
521 new = smalloc(sizeof(*new));
523 memcpy(new->data = smalloc(size), data, new->size = size);
524 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
525 if(sk->outbuf.d.l == NULL)
527 sk->outbuf.d.l = sk->outbuf.d.f = new;
529 sk->outbuf.d.l->next = new;
530 sk->outbuf.d.l = new;
536 size_t sockgetdatalen(struct socket *sk)
544 ret = sk->inbuf.s.datasize;
548 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
555 size_t sockqueuesize(struct socket *sk)
563 ret = sk->outbuf.s.datasize;
567 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
575 * The difference between netcslisten() and netcslistenlocal() is that
576 * netcslistenlocal() always listens on the local host, instead of
577 * following proxy/passive mode directions. It is suitable for eg. the
578 * UI channel, while the file sharing networks should, naturally, use
579 * netcslisten() instead.
582 struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
587 /* I don't know if this is actually correct (it probably isn't),
588 * but since, at on least Linux systems, PF_* are specifically
589 * #define'd to their AF_* counterparts, it allows for a severely
590 * smoother implementation. If it breaks something on your
591 * platform, please tell me so.
593 if((sk = mksock(name->sa_family, type)) == NULL)
595 sk->state = SOCK_LST;
596 if(confgetint("net", "reuseaddr"))
599 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
601 if(bind(sk->fd, name, namelen) < 0)
606 if(listen(sk->fd, 16) < 0)
616 struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
618 if(confgetint("net", "mode") == 1)
623 if(confgetint("net", "mode") == 0)
624 return(netcslistenlocal(type, name, namelen, func, data));
629 struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
631 struct sockaddr_in addr;
633 struct sockaddr_in6 addr6;
635 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
639 csfunc = netcslistenlocal;
641 csfunc = netcslisten;
643 memset(&addr6, 0, sizeof(addr6));
644 addr6.sin6_family = AF_INET6;
645 addr6.sin6_port = htons(port);
646 addr6.sin6_addr = in6addr_any;
647 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
649 if((ret == NULL) && (errno != EAFNOSUPPORT))
652 memset(&addr, 0, sizeof(addr));
653 addr.sin_family = AF_INET;
654 addr.sin_port = htons(port);
655 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
658 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
663 mode = confgetint("net", "mode");
664 if((mode == 0) || (mode == 1))
666 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
668 if(bind(sk->fd, name, namelen) < 0)
673 sk->state = SOCK_EST;
680 struct socket *netdupsock(struct socket *sk)
682 struct socket *newsk;
684 newsk = newsock(sk->type);
685 if((newsk->fd = dup(sk->fd)) < 0)
687 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
691 newsk->state = sk->state;
692 newsk->ignread = sk->ignread;
693 if(sk->remote != NULL)
694 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
698 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
700 if(sk->remote != NULL)
702 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
706 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
711 mode = confgetint("net", "mode");
712 if((mode == 0) || (mode == 1))
714 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
716 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
717 if(!connect(sk->fd, addr, addrlen))
719 sk->state = SOCK_EST;
723 if(errno == EINPROGRESS)
725 sk->state = SOCK_SYN;
737 int pollsocks(int timeout)
743 struct socket *sk, *next, *newsk;
744 struct sockaddr_storage ss;
747 pfds = smalloc(sizeof(*pfds) * (num = numsocks));
748 for(i = 0, sk = sockets; i < num; sk = sk->next)
750 if(sk->state == SOCK_STL)
758 pfds[i].events |= POLLIN;
759 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
760 pfds[i].events |= POLLOUT;
764 ret = poll(pfds, num, timeout);
769 flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno));
770 /* To avoid CPU hogging in case it's bad, which it
777 for(sk = sockets; sk != NULL; sk = next)
780 for(i = 0; i < num; i++)
782 if(pfds[i].fd == sk->fd)
790 if(pfds[i].revents & POLLIN)
793 if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0)
795 if(sk->errcb != NULL)
796 sk->errcb(sk, errno, sk->data);
798 newsk = newsock(sk->type);
800 newsk->family = sk->family;
801 newsk->state = SOCK_EST;
802 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
803 newsk->remotelen = sslen;
805 if(sk->acceptcb != NULL)
806 sk->acceptcb(sk, newsk, sk->data);
808 if(pfds[i].revents & POLLERR)
810 retlen = sizeof(ret);
811 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
812 if(sk->errcb != NULL)
813 sk->errcb(sk, ret, sk->data);
818 if(pfds[i].revents & POLLERR)
820 retlen = sizeof(ret);
821 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
822 if(sk->conncb != NULL)
823 sk->conncb(sk, ret, sk->data);
827 if(pfds[i].revents & (POLLIN | POLLOUT))
829 sk->state = SOCK_EST;
830 if(sk->conncb != NULL)
831 sk->conncb(sk, 0, sk->data);
835 if(pfds[i].revents & POLLERR)
837 retlen = sizeof(ret);
838 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
839 if(sk->errcb != NULL)
840 sk->errcb(sk, ret, sk->data);
844 if(pfds[i].revents & POLLIN)
846 if(pfds[i].revents & POLLOUT)
848 if(sockqueuesize(sk) > 0)
853 if(pfds[i].revents & POLLNVAL)
855 flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd);
856 sk->state = SOCK_STL;
860 if(pfds[i].revents & POLLHUP)
862 if(sk->errcb != NULL)
863 sk->errcb(sk, 0, sk->data);
870 for(sk = sockets; sk != NULL; sk = next)
873 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
878 if(sk->close && (sockqueuesize(sk) == 0))
880 if(sk->state == SOCK_STL)
889 int socksettos(struct socket *sk, int tos)
893 if(sk->family == AF_INET)
900 case SOCK_TOS_MINCOST:
903 case SOCK_TOS_MAXREL:
909 case SOCK_TOS_MINDELAY:
913 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
916 if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0)
918 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
923 if(sk->family == AF_INET6)
929 case SOCK_TOS_MINCOST:
930 buf = confgetint("net", "diffserv-mincost");
932 case SOCK_TOS_MAXREL:
933 buf = confgetint("net", "diffserv-maxrel");
936 buf = confgetint("net", "diffserv-maxtp");
938 case SOCK_TOS_MINDELAY:
939 buf = confgetint("net", "diffserv-mindelay");
942 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
946 On Linux, the API IPv6 flow label management doesn't seem to
947 be entirely complete, so I guess this will have to wait.
949 if(setsockopt(...) < 0)
951 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
957 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
964 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
966 struct sockaddr_storage addr;
970 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
974 struct sockaddr_in *ipv4;
978 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
981 data->callback(NULL, 0, data->data);
983 ipv4 = (struct sockaddr_in *)&data->addr;
984 memcpy(&ipv4->sin_addr, buf, 4);
985 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
989 data->callback(NULL, 0, data->data);
995 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
1002 struct resolvedata *rdata;
1003 struct sockaddr_in ipv4;
1009 if((p = strchr(addr, ':')) != NULL)
1014 ipv4.sin_family = AF_INET;
1015 ipv4.sin_port = htons(port);
1016 if(inet_aton(addr, &ipv4.sin_addr))
1018 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
1020 sigemptyset(&sigset);
1021 sigaddset(&sigset, SIGCHLD);
1022 sigprocmask(SIG_BLOCK, &sigset, NULL);
1023 if((pipe(pfd) < 0) || ((child = fork()) < 0))
1025 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1030 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1031 for(i = 3; i < FD_SETSIZE; i++)
1036 signal(SIGALRM, SIG_DFL);
1038 if((he = gethostbyname(addr)) == NULL)
1040 write(pfd[1], he->h_addr_list[0], 4);
1044 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1045 rdata = smalloc(sizeof(*rdata));
1047 rdata->callback = callback;
1049 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1050 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1051 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1058 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1061 struct sockaddr_storage name;
1064 if((sk->state == SOCK_STL) || (sk->fd < 0))
1067 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1069 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno));
1072 *namebuf = memcpy(smalloc(len), &name, len);
1078 static void sethostaddr(struct sockaddr *dst, struct sockaddr *src)
1080 if(dst->sa_family != src->sa_family)
1082 flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family);
1085 switch(src->sa_family)
1088 ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr;
1091 ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr;
1094 flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family);
1099 static int makepublic(struct sockaddr *addr)
1103 struct sockaddr *pname;
1105 if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0)
1107 flog(LOG_ERR, "could not get public address: %s", strerror(errno));
1112 sethostaddr(addr, pname);
1117 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1120 struct sockaddr *name;
1122 switch(confgetint("net", "mode"))
1126 if((sk->state == SOCK_STL) || (sk->fd < 0))
1131 if(!sockgetlocalname(sk, &name, &len))
1138 flog(LOG_ERR, "could not get remotely accessible name by any means");
1144 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1150 int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf)
1152 struct sockaddr *name1, *name2;
1153 socklen_t len1, len2;
1155 if(sk->family != sk2->family)
1157 flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family);
1160 if(sockgetremotename(sk, &name1, &len1))
1162 if(sockgetremotename(sk2, &name2, &len2)) {
1166 sethostaddr(name1, name2);
1173 int addreq(struct sockaddr *x, struct sockaddr *y)
1175 struct sockaddr_un *u1, *u2;
1176 struct sockaddr_in *n1, *n2;
1178 struct sockaddr_in6 *s1, *s2;
1181 if(x->sa_family != y->sa_family)
1183 switch(x->sa_family) {
1185 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1186 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1190 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1191 if(n1->sin_port != n2->sin_port)
1193 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1198 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1199 if(s1->sin6_port != s2->sin6_port)
1201 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1209 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1211 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1212 * lowercase letters to 1, so I do this
1214 struct sockaddr_in *ipv4;
1216 struct sockaddr_in6 *ipv6;
1218 static char *ret = NULL;
1224 switch(arg->sa_family)
1227 UNIX = (struct sockaddr_un *)arg;
1228 ret = sprintf2("%s", UNIX->sun_path);
1231 ipv4 = (struct sockaddr_in *)arg;
1232 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1234 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1238 ipv6 = (struct sockaddr_in6 *)arg;
1239 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1241 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
1245 errno = EPFNOSUPPORT;
1254 * It was very nice to use this, but it seems
1255 * to mess things up, so I guess it has to go... :-(
1258 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1260 struct sockaddr *arg;
1262 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1263 * lowercase letters to 1, so I do this
1265 struct sockaddr_in *ipv4;
1268 arg = *(struct sockaddr **)(args[0]);
1269 arglen = *(socklen_t *)(args[1]);
1270 switch(arg->sa_family)
1273 UNIX = (struct sockaddr_un *)arg;
1274 ret = fprintf(stream, "%s", UNIX->sun_path);
1277 ipv4 = (struct sockaddr_in *)arg;
1278 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1282 errno = EPFNOSUPPORT;
1288 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1291 argtypes[0] = PA_POINTER;
1293 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1294 * be an int, so I guess this should be
1300 static int init(int hup)
1305 if(register_printf_function('N', formataddress, formataddress_arginfo))
1307 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1315 static void terminate(void)
1317 while(sockets != NULL)
1318 unlinksock(sockets);
1321 static struct module me =
1329 .terminate = terminate