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>
31 #include <sys/select.h>
32 #include <arpa/inet.h>
33 #include <netinet/in.h>
35 #include <sys/signal.h>
36 #include <sys/stat.h> /* For rebindunix() */
37 #ifdef HAVE_LINUX_SOCKIOS_H
38 #include <linux/sockios.h>
48 #include "sysevents.h"
50 static struct configvar myvars[] =
52 /** The network mode to use. Currently supported values are 0 for
53 * active mode and 1 for passive mode. In the future, SOCKS5 proxy
54 * support may be added. */
55 {CONF_VAR_INT, "mode", {.num = 0}},
56 /** Set the SO_REUSEADDR socket option on listening sockets, so
57 * that dead TCP connections waiting for timeout are ignored. */
58 {CONF_VAR_BOOL, "reuseaddr", {.num = 0}},
59 /** Overrides the IPv4 address reported to other clients in active
60 * mode. Useful for servers behind NAT routers. If both this and
61 * net.publicif are unspecified the address of the hub connection
63 {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}},
64 /** Specifies an interface name from which to fetch the IPv4
65 * address reported to other clients in active mode. If both this
66 * and net.visibleipv4 are unspecified the address of the hub
67 * connection is used. */
68 {CONF_VAR_STRING, "publicif", {.str = L""}},
69 /* Diffserv should be supported on IPv4, too, but I don't know the
71 /** The Diffserv value to use on IPv6 connections when the
72 * minimize cost TOS value is used (see the TOS VALUES
74 {CONF_VAR_INT, "diffserv-mincost", {.num = 0}},
75 /** The Diffserv value to use on IPv6 connections when the
76 * maximize reliability TOS value is used (see the TOS VALUES
78 {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}},
79 /** The Diffserv value to use on IPv6 connections when the
80 * maximize throughput TOS value is used (see the TOS VALUES
82 {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}},
83 /** The Diffserv value to use on IPv6 connections when the
84 * minimize delay TOS value is used (see the TOS VALUES
86 {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}},
90 static struct socket *sockets = NULL;
93 /* XXX: Get autoconf for all this... */
94 int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf)
96 struct sockaddr_in *ipv4;
97 struct configvar *var;
101 struct ifreq *ifr, req;
106 var = confgetvar("net", "visibleipv4");
107 if(var->val.ipv4.s_addr != 0)
109 ipv4 = smalloc(sizeof(*ipv4));
110 ipv4->sin_family = AF_INET;
111 ipv4->sin_addr.s_addr = var->val.ipv4.s_addr;
112 *addr = (struct sockaddr *)ipv4;
113 *lenbuf = sizeof(*ipv4);
116 if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL)
118 flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno));
123 if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
125 conf.ifc_buf = smalloc(conf.ifc_len = 65536);
126 if(ioctl(sock, SIOCGIFCONF, &conf) < 0)
132 bufend = ((char *)conf.ifc_buf) + conf.ifc_len;
134 for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++)
136 if(strcmp(ifr->ifr_name, pif))
138 memset(&req, 0, sizeof(req));
139 memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
140 if(ioctl(sock, SIOCGIFFLAGS, &req) < 0)
142 if(!(req.ifr_flags & IFF_UP))
144 flog(LOG_WARNING, "public interface is down");
147 if(ifr->ifr_addr.sa_family != AF_INET)
149 flog(LOG_WARNING, "address of the public interface is not AF_INET");
152 ipv4 = smalloc(sizeof(*ipv4));
153 memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr));
160 *addr = (struct sockaddr *)ipv4;
161 *lenbuf = sizeof(*ipv4);
170 static struct socket *newsock(int type)
174 new = smalloc(sizeof(*new));
175 memset(new, 0, sizeof(*new));
178 new->isrealsocket = 1;
192 new->outbuf.s.buf = NULL;
193 new->outbuf.s.bufsize = 0;
194 new->outbuf.s.datasize = 0;
195 new->inbuf.s.buf = NULL;
196 new->inbuf.s.bufsize = 0;
197 new->inbuf.s.datasize = 0;
200 new->outbuf.d.f = new->outbuf.d.l = NULL;
201 new->inbuf.d.f = new->inbuf.d.l = NULL;
208 new->acceptcb = NULL;
218 static struct socket *mksock(int domain, int type)
223 if((fd = socket(domain, type, 0)) < 0)
225 flog(LOG_CRIT, "could not create socket: %s", strerror(errno));
230 new->family = domain;
231 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
235 struct socket *wrapsock(int fd)
239 new = newsock(SOCK_STREAM);
241 new->state = SOCK_EST;
242 new->isrealsocket = 0;
243 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
247 static void unlinksock(struct socket *sk)
250 sk->prev->next = sk->next;
252 sk->next->prev = sk->prev;
259 void getsock(struct socket *sk)
264 void putsock(struct socket *sk)
266 struct dgrambuf *buf;
268 if(--(sk->refcount) == 0)
273 if(sk->outbuf.s.buf != NULL)
274 free(sk->outbuf.s.buf);
275 if(sk->inbuf.s.buf != NULL)
276 free(sk->inbuf.s.buf);
279 while((buf = sk->outbuf.d.f) != NULL)
281 sk->outbuf.d.f = buf->next;
286 while((buf = sk->inbuf.d.f) != NULL)
288 sk->inbuf.d.f = buf->next;
296 if(sk->remote != NULL)
302 void sockpushdata(struct socket *sk, void *buf, size_t size)
307 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1);
308 memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize);
309 memcpy(sk->inbuf.s.buf, buf, size);
310 sk->inbuf.s.datasize += size;
319 void *sockgetinbuf(struct socket *sk, size_t *size)
322 struct dgrambuf *dbuf;
327 if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0))
332 buf = sk->inbuf.s.buf;
333 *size = sk->inbuf.s.datasize;
334 sk->inbuf.s.buf = NULL;
335 sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0;
338 if((dbuf = sk->inbuf.d.f) == NULL)
340 sk->inbuf.d.f = dbuf->next;
341 if(dbuf->next == NULL)
342 sk->inbuf.d.l = NULL;
352 static void recvcmsg(struct socket *sk, struct msghdr *msg)
354 struct cmsghdr *cmsg;
356 for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg))
358 #if UNIX_AUTH_STYLE == 1
359 if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS))
362 if(sk->ucred.uid == -1)
364 cred = (struct ucred *)CMSG_DATA(cmsg);
365 sk->ucred.uid = cred->uid;
366 sk->ucred.gid = cred->gid;
373 static void sockrecv(struct socket *sk)
376 struct dgrambuf *dbuf;
381 memset(&msg, 0, sizeof(msg));
382 msg.msg_iov = &bufvec;
384 msg.msg_control = cbuf;
385 msg.msg_controllen = sizeof(cbuf);
389 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
390 /* SIOCINQ is Linux-specific AFAIK, but I really have no idea
391 * how to read the inqueue size on other OSs */
392 if(sk->isrealsocket) {
393 if(ioctl(sk->fd, SIOCINQ, &inq))
395 /* I don't really know what could go wrong here, so let's
396 * assume it's transient. */
397 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
401 /* There are perils when trying to use SIOCINQ on files >2GiB... */
409 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
412 bufvec.iov_base = sk->inbuf.s.buf + sk->inbuf.s.datasize;
413 bufvec.iov_len = inq;
414 ret = recvmsg(sk->fd, &msg, 0);
416 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
417 msg.msg_controllen = 0;
422 if((errno == EINTR) || (errno == EAGAIN))
424 if(sk->errcb != NULL)
425 sk->errcb(sk, errno, sk->data);
429 if(msg.msg_flags & MSG_CTRUNC)
430 flog(LOG_DEBUG, "ancillary data was truncated");
435 if(sk->errcb != NULL)
436 sk->errcb(sk, 0, sk->data);
440 sk->inbuf.s.datasize += ret;
441 if(sk->readcb != NULL)
442 sk->readcb(sk, sk->data);
445 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
446 if(ioctl(sk->fd, SIOCINQ, &inq))
448 /* I don't really know what could go wrong here, so let's
449 * assume it's transient. */
450 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
456 dbuf = smalloc(sizeof(*dbuf));
457 dbuf->data = smalloc(inq);
458 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
460 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
462 msg.msg_name = dbuf->addr;
463 msg.msg_namelen = dbuf->addrlen;
464 bufvec.iov_base = dbuf->data;
465 bufvec.iov_len = inq;
466 ret = recvmsg(sk->fd, &msg, 0);
467 dbuf->addrlen = msg.msg_namelen;
473 if((errno == EINTR) || (errno == EAGAIN))
475 if(sk->errcb != NULL)
476 sk->errcb(sk, errno, sk->data);
480 if(msg.msg_flags & MSG_CTRUNC)
481 flog(LOG_DEBUG, "ancillary data was truncated");
484 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
485 * have EOF), but rather an empty packet. I don't know if any
486 * other potential DGRAM protocols might have an EOF
487 * condition, so let's play safe. */
493 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
495 if(sk->errcb != NULL)
496 sk->errcb(sk, 0, sk->data);
501 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
502 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
504 if(sk->inbuf.d.l != NULL)
505 sk->inbuf.d.l->next = dbuf;
507 sk->inbuf.d.f = dbuf;
508 sk->inbuf.d.l = dbuf;
509 if(sk->readcb != NULL)
510 sk->readcb(sk, sk->data);
515 static void sockflush(struct socket *sk)
518 struct dgrambuf *dbuf;
524 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
526 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
529 if((errno != EINTR) && (errno != EAGAIN))
531 if(sk->errcb != NULL)
532 sk->errcb(sk, errno, sk->data);
539 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
540 if(sk->writecb != NULL)
541 sk->writecb(sk, sk->data);
545 dbuf = sk->outbuf.d.f;
546 if((sk->outbuf.d.f = dbuf->next) == NULL)
547 sk->outbuf.d.l = NULL;
548 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
552 if(sk->writecb != NULL)
553 sk->writecb(sk, sk->data);
558 void closesock(struct socket *sk)
560 struct sockaddr_un *un;
562 if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX))
564 if((sk->state == SOCK_LST) && strchr(un->sun_path, '/'))
566 if(unlink(un->sun_path))
567 flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno));
570 sk->state = SOCK_STL;
576 void sockqueue(struct socket *sk, void *data, size_t size)
578 struct dgrambuf *new;
580 if(sk->state == SOCK_STL)
585 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
586 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
587 sk->outbuf.s.datasize += size;
590 if(sk->remote == NULL)
592 new = smalloc(sizeof(*new));
594 memcpy(new->data = smalloc(size), data, new->size = size);
595 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
596 if(sk->outbuf.d.l == NULL)
598 sk->outbuf.d.l = sk->outbuf.d.f = new;
600 sk->outbuf.d.l->next = new;
601 sk->outbuf.d.l = new;
607 size_t sockgetdatalen(struct socket *sk)
615 ret = sk->inbuf.s.datasize;
619 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
626 size_t sockqueuesize(struct socket *sk)
634 ret = sk->outbuf.s.datasize;
638 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
646 * Seriously, I don't know if it's naughty or not to remove
647 * pre-existing Unix sockets.
649 static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen)
651 struct sockaddr_un *un;
654 if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX))
656 un = (struct sockaddr_un *)name;
657 if(stat(un->sun_path, &sb))
659 if(!S_ISSOCK(sb.st_mode))
661 if(unlink(un->sun_path))
663 if(bind(sk->fd, name, namelen) < 0)
669 * The difference between netcslisten() and netcslistenlocal() is that
670 * netcslistenlocal() always listens on the local host, instead of
671 * following proxy/passive mode directions. It is suitable for eg. the
672 * UI channel, while the file sharing networks should, naturally, use
673 * netcslisten() instead.
676 struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
681 /* I don't know if this is actually correct (it probably isn't),
682 * but since, at on least Linux systems, PF_* are specifically
683 * #define'd to their AF_* counterparts, it allows for a severely
684 * smoother implementation. If it breaks something on your
685 * platform, please tell me so.
687 if((sk = mksock(name->sa_family, type)) == NULL)
689 sk->state = SOCK_LST;
690 if(confgetint("net", "reuseaddr"))
693 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
695 if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0)))
700 if(listen(sk->fd, 16) < 0)
710 struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
712 if(confgetint("net", "mode") == 1)
717 if(confgetint("net", "mode") == 0)
718 return(netcslistenlocal(type, name, namelen, func, data));
723 struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
725 struct sockaddr_in addr;
727 struct sockaddr_in6 addr6;
729 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
733 csfunc = netcslistenlocal;
735 csfunc = netcslisten;
737 memset(&addr6, 0, sizeof(addr6));
738 addr6.sin6_family = AF_INET6;
739 addr6.sin6_port = htons(port);
740 addr6.sin6_addr = in6addr_any;
741 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
743 if((ret == NULL) && (errno != EAFNOSUPPORT))
746 memset(&addr, 0, sizeof(addr));
747 addr.sin_family = AF_INET;
748 addr.sin_port = htons(port);
749 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
752 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
757 mode = confgetint("net", "mode");
758 if((mode == 0) || (mode == 1))
760 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
762 if(bind(sk->fd, name, namelen) < 0)
767 sk->state = SOCK_EST;
774 struct socket *netdupsock(struct socket *sk)
776 struct socket *newsk;
778 newsk = newsock(sk->type);
779 if((newsk->fd = dup(sk->fd)) < 0)
781 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
785 newsk->state = sk->state;
786 newsk->ignread = sk->ignread;
787 if(sk->remote != NULL)
788 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
792 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
794 if(sk->remote != NULL)
796 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
800 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
805 mode = confgetint("net", "mode");
806 if((mode == 0) || (mode == 1))
808 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
810 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
811 if(!connect(sk->fd, addr, addrlen))
813 sk->state = SOCK_EST;
817 if(errno == EINPROGRESS)
819 sk->state = SOCK_SYN;
831 static void acceptunix(struct socket *sk)
836 #if UNIX_AUTH_STYLE == 1
837 if(setsockopt(sk->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0)
838 flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", sk->fd, strerror(errno));
839 #elif UNIX_AUTH_STYLE == 2
840 if(getpeereid(sk->fd, &sk->ucred.uid, &sk->ucred.gid) < 0)
842 flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", sk->fd, strerror(errno));
849 int pollsocks(int timeout)
854 fd_set rfds, wfds, efds;
855 struct socket *sk, *next, *newsk;
856 struct sockaddr_storage ss;
863 for(maxfd = 0, sk = sockets; sk != NULL; sk = sk->next)
865 if((sk->state == SOCK_STL) || (sk->fd < 0))
868 FD_SET(sk->fd, &rfds);
869 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
870 FD_SET(sk->fd, &wfds);
871 FD_SET(sk->fd, &efds);
875 tv.tv_sec = timeout / 1000;
876 tv.tv_usec = (timeout % 1000) * 1000;
877 ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv);
882 flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno));
883 /* To avoid CPU hogging in case it's bad, which it
889 for(sk = sockets; sk != NULL; sk = next)
896 if(FD_ISSET(fd, &rfds))
899 if((newfd = accept(fd, (struct sockaddr *)&ss, &sslen)) < 0)
901 if(sk->errcb != NULL)
902 sk->errcb(sk, errno, sk->data);
904 newsk = newsock(sk->type);
906 newsk->family = sk->family;
907 newsk->state = SOCK_EST;
908 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
909 newsk->remotelen = sslen;
910 if(ss.ss_family == PF_UNIX)
912 if(sk->acceptcb != NULL)
913 sk->acceptcb(sk, newsk, sk->data);
916 if(FD_ISSET(fd, &efds))
918 retlen = sizeof(ret);
919 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
920 if(sk->errcb != NULL)
921 sk->errcb(sk, ret, sk->data);
926 if(FD_ISSET(fd, &efds))
928 retlen = sizeof(ret);
929 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
930 if(sk->conncb != NULL)
931 sk->conncb(sk, ret, sk->data);
935 if(FD_ISSET(fd, &rfds) || FD_ISSET(fd, &wfds))
937 sk->state = SOCK_EST;
938 if(sk->conncb != NULL)
939 sk->conncb(sk, 0, sk->data);
943 if(FD_ISSET(fd, &efds))
945 retlen = sizeof(ret);
946 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
947 if(sk->errcb != NULL)
948 sk->errcb(sk, ret, sk->data);
952 if(FD_ISSET(fd, &rfds))
954 if(FD_ISSET(fd, &wfds))
956 if(sockqueuesize(sk) > 0)
962 for(sk = sockets; sk != NULL; sk = next)
965 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
970 if(sk->close && (sockqueuesize(sk) == 0))
972 if(sk->state == SOCK_STL)
981 int socksettos(struct socket *sk, int tos)
985 if(sk->family == AF_UNIX)
986 return(0); /* Unix sockets are always perfect. :) */
987 if(sk->family == AF_INET)
994 case SOCK_TOS_MINCOST:
997 case SOCK_TOS_MAXREL:
1000 case SOCK_TOS_MAXTP:
1003 case SOCK_TOS_MINDELAY:
1007 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
1010 if(setsockopt(sk->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0)
1012 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
1017 if(sk->family == AF_INET6)
1023 case SOCK_TOS_MINCOST:
1024 buf = confgetint("net", "diffserv-mincost");
1026 case SOCK_TOS_MAXREL:
1027 buf = confgetint("net", "diffserv-maxrel");
1029 case SOCK_TOS_MAXTP:
1030 buf = confgetint("net", "diffserv-maxtp");
1032 case SOCK_TOS_MINDELAY:
1033 buf = confgetint("net", "diffserv-mindelay");
1036 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
1040 On Linux, the API IPv6 flow label management doesn't seem to
1041 be entirely complete, so I guess this will have to wait.
1043 if(setsockopt(...) < 0)
1045 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
1051 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
1058 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
1060 struct sockaddr_storage addr;
1064 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
1066 static char buf[80];
1068 struct sockaddr_in *ipv4;
1072 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
1075 data->callback(NULL, 0, data->data);
1077 ipv4 = (struct sockaddr_in *)&data->addr;
1078 memcpy(&ipv4->sin_addr, buf, 4);
1079 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
1083 data->callback(NULL, 0, data->data);
1089 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
1096 struct resolvedata *rdata;
1097 struct sockaddr_in ipv4;
1103 if((p = strchr(addr, ':')) != NULL)
1108 ipv4.sin_family = AF_INET;
1109 ipv4.sin_port = htons(port);
1110 if(inet_aton(addr, &ipv4.sin_addr))
1112 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
1114 sigemptyset(&sigset);
1115 sigaddset(&sigset, SIGCHLD);
1116 sigprocmask(SIG_BLOCK, &sigset, NULL);
1117 if((pipe(pfd) < 0) || ((child = fork()) < 0))
1119 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1124 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1125 for(i = 3; i < FD_SETSIZE; i++)
1130 signal(SIGALRM, SIG_DFL);
1132 if((he = gethostbyname(addr)) == NULL)
1134 write(pfd[1], he->h_addr_list[0], 4);
1138 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1139 rdata = smalloc(sizeof(*rdata));
1141 rdata->callback = callback;
1143 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1144 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1145 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1152 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1155 struct sockaddr_storage name;
1158 if((sk->state == SOCK_STL) || (sk->fd < 0))
1161 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1163 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno));
1166 *namebuf = memcpy(smalloc(len), &name, len);
1172 static void sethostaddr(struct sockaddr *dst, struct sockaddr *src)
1174 if(dst->sa_family != src->sa_family)
1176 flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family);
1179 switch(src->sa_family)
1182 ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr;
1185 ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr;
1188 flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family);
1193 static int makepublic(struct sockaddr *addr)
1197 struct sockaddr *pname;
1199 if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0)
1201 flog(LOG_ERR, "could not get public address: %s", strerror(errno));
1206 sethostaddr(addr, pname);
1211 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1214 struct sockaddr *name;
1216 switch(confgetint("net", "mode"))
1220 if((sk->state == SOCK_STL) || (sk->fd < 0))
1225 if(!sockgetlocalname(sk, &name, &len))
1232 flog(LOG_ERR, "could not get remotely accessible name by any means");
1238 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1244 int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf)
1246 struct sockaddr *name1, *name2;
1247 socklen_t len1, len2;
1249 if(sk->family != sk2->family)
1251 flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family);
1254 if(sockgetremotename(sk, &name1, &len1))
1256 if(sockgetremotename(sk2, &name2, &len2)) {
1260 sethostaddr(name1, name2);
1267 int addreq(struct sockaddr *x, struct sockaddr *y)
1269 struct sockaddr_un *u1, *u2;
1270 struct sockaddr_in *n1, *n2;
1272 struct sockaddr_in6 *s1, *s2;
1275 if(x->sa_family != y->sa_family)
1277 switch(x->sa_family) {
1279 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1280 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1284 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1285 if(n1->sin_port != n2->sin_port)
1287 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1292 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1293 if(s1->sin6_port != s2->sin6_port)
1295 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1303 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1305 struct sockaddr_in *ipv4;
1307 struct sockaddr_in6 *ipv6;
1309 static char *ret = NULL;
1315 switch(arg->sa_family)
1318 ret = sstrdup("Unix socket");
1321 ipv4 = (struct sockaddr_in *)arg;
1322 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1324 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1328 ipv6 = (struct sockaddr_in6 *)arg;
1329 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1331 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
1335 errno = EPFNOSUPPORT;
1344 * It was very nice to use this, but it seems
1345 * to mess things up, so I guess it has to go... :-(
1348 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1350 struct sockaddr *arg;
1352 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1353 * lowercase letters to 1, so I do this
1355 struct sockaddr_in *ipv4;
1358 arg = *(struct sockaddr **)(args[0]);
1359 arglen = *(socklen_t *)(args[1]);
1360 switch(arg->sa_family)
1363 UNIX = (struct sockaddr_un *)arg;
1364 ret = fprintf(stream, "%s", UNIX->sun_path);
1367 ipv4 = (struct sockaddr_in *)arg;
1368 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1372 errno = EPFNOSUPPORT;
1378 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1381 argtypes[0] = PA_POINTER;
1383 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1384 * be an int, so I guess this should be
1390 static int init(int hup)
1395 if(register_printf_function('N', formataddress, formataddress_arginfo))
1397 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1405 static void terminate(void)
1407 while(sockets != NULL)
1408 unlinksock(sockets);
1411 static struct module me =
1419 .terminate = terminate