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 #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));
177 new->isrealsocket = 1;
186 memset(&new->ucred, 0, sizeof(new->ucred));
190 new->outbuf.s.buf = NULL;
191 new->outbuf.s.bufsize = 0;
192 new->outbuf.s.datasize = 0;
193 new->inbuf.s.buf = NULL;
194 new->inbuf.s.bufsize = 0;
195 new->inbuf.s.datasize = 0;
198 new->outbuf.d.f = new->outbuf.d.l = NULL;
199 new->inbuf.d.f = new->inbuf.d.l = NULL;
206 new->acceptcb = NULL;
216 static struct socket *mksock(int domain, int type)
221 if((fd = socket(domain, type, 0)) < 0)
223 flog(LOG_CRIT, "could not create socket: %s", strerror(errno));
228 new->family = domain;
229 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
233 struct socket *wrapsock(int fd)
237 new = newsock(SOCK_STREAM);
239 new->state = SOCK_EST;
240 new->isrealsocket = 0;
241 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
245 static void unlinksock(struct socket *sk)
248 sk->prev->next = sk->next;
250 sk->next->prev = sk->prev;
257 void getsock(struct socket *sk)
262 void putsock(struct socket *sk)
264 struct dgrambuf *buf;
266 if(--(sk->refcount) == 0)
271 if(sk->outbuf.s.buf != NULL)
272 free(sk->outbuf.s.buf);
273 if(sk->inbuf.s.buf != NULL)
274 free(sk->inbuf.s.buf);
277 while((buf = sk->outbuf.d.f) != NULL)
279 sk->outbuf.d.f = buf->next;
284 while((buf = sk->inbuf.d.f) != NULL)
286 sk->inbuf.d.f = buf->next;
294 if(sk->remote != NULL)
300 void sockpushdata(struct socket *sk, void *buf, size_t size)
305 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1);
306 memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize);
307 memcpy(sk->inbuf.s.buf, buf, size);
308 sk->inbuf.s.datasize += size;
317 void *sockgetinbuf(struct socket *sk, size_t *size)
320 struct dgrambuf *dbuf;
325 if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0))
330 buf = sk->inbuf.s.buf;
331 *size = sk->inbuf.s.datasize;
332 sk->inbuf.s.buf = NULL;
333 sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0;
336 if((dbuf = sk->inbuf.d.f) == NULL)
338 sk->inbuf.d.f = dbuf->next;
339 if(dbuf->next == NULL)
340 sk->inbuf.d.l = NULL;
350 static void recvcmsg(struct socket *sk, struct msghdr *msg)
352 struct cmsghdr *cmsg;
355 for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg))
357 if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS))
359 if(sk->ucred.pid == 0)
361 cred = (struct ucred *)CMSG_DATA(cmsg);
362 memcpy(&sk->ucred, cred, sizeof(*cred));
363 flog(LOG_INFO, "received Unix creds: pid %i, uid %i, gid %i", cred->pid, cred->uid, cred->gid);
369 static void sockrecv(struct socket *sk)
372 struct dgrambuf *dbuf;
377 memset(&msg, 0, sizeof(msg));
378 msg.msg_iov = &bufvec;
380 msg.msg_control = cbuf;
381 msg.msg_controllen = sizeof(cbuf);
385 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
386 /* SIOCINQ is Linux-specific AFAIK, but I really have no idea
387 * how to read the inqueue size on other OSs */
388 if(ioctl(sk->fd, SIOCINQ, &inq))
390 /* I don't really know what could go wrong here, so let's
391 * assume it's transient. */
392 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
400 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
402 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
404 bufvec.iov_base = sk->inbuf.s.buf + sk->inbuf.s.datasize;
405 bufvec.iov_len = inq;
406 ret = recvmsg(sk->fd, &msg, 0);
409 if((errno == EINTR) || (errno == EAGAIN))
411 if(sk->errcb != NULL)
412 sk->errcb(sk, errno, sk->data);
416 if(msg.msg_flags & MSG_CTRUNC)
417 flog(LOG_DEBUG, "ancillary data was truncated");
422 if(sk->errcb != NULL)
423 sk->errcb(sk, 0, sk->data);
427 sk->inbuf.s.datasize += ret;
428 if(sk->readcb != NULL)
429 sk->readcb(sk, sk->data);
432 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
433 if(ioctl(sk->fd, SIOCINQ, &inq))
435 /* I don't really know what could go wrong here, so let's
436 * assume it's transient. */
437 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
443 dbuf = smalloc(sizeof(*dbuf));
444 dbuf->data = smalloc(inq);
445 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
447 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
449 msg.msg_name = dbuf->addr;
450 msg.msg_namelen = dbuf->addrlen;
451 bufvec.iov_base = dbuf->data;
452 bufvec.iov_len = inq;
453 ret = recvmsg(sk->fd, &msg, 0);
454 dbuf->addrlen = msg.msg_namelen;
460 if((errno == EINTR) || (errno == EAGAIN))
462 if(sk->errcb != NULL)
463 sk->errcb(sk, errno, sk->data);
467 if(msg.msg_flags & MSG_CTRUNC)
468 flog(LOG_DEBUG, "ancillary data was truncated");
471 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
472 * have EOF), but rather an empty packet. I don't know if any
473 * other potential DGRAM protocols might have an EOF
474 * condition, so let's play safe. */
480 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
482 if(sk->errcb != NULL)
483 sk->errcb(sk, 0, sk->data);
488 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
489 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
491 if(sk->inbuf.d.l != NULL)
492 sk->inbuf.d.l->next = dbuf;
494 sk->inbuf.d.f = dbuf;
495 sk->inbuf.d.l = dbuf;
496 if(sk->readcb != NULL)
497 sk->readcb(sk, sk->data);
502 static void sockflush(struct socket *sk)
505 struct dgrambuf *dbuf;
511 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
513 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
516 /* For now, assume transient error, since
517 * the socket is polled for errors */
522 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
523 if(sk->writecb != NULL)
524 sk->writecb(sk, sk->data);
528 dbuf = sk->outbuf.d.f;
529 if((sk->outbuf.d.f = dbuf->next) == NULL)
530 sk->outbuf.d.l = NULL;
531 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
535 if(sk->writecb != NULL)
536 sk->writecb(sk, sk->data);
541 void closesock(struct socket *sk)
543 struct sockaddr_un *un;
545 if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)&un, NULL) && (un->sun_family == PF_UNIX))
547 if((sk->state == SOCK_LST) && strchr(un->sun_path, '/'))
549 if(unlink(un->sun_path))
550 flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno));
553 sk->state = SOCK_STL;
559 void sockqueue(struct socket *sk, void *data, size_t size)
561 struct dgrambuf *new;
563 if(sk->state == SOCK_STL)
568 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
569 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
570 sk->outbuf.s.datasize += size;
573 if(sk->remote == NULL)
575 new = smalloc(sizeof(*new));
577 memcpy(new->data = smalloc(size), data, new->size = size);
578 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
579 if(sk->outbuf.d.l == NULL)
581 sk->outbuf.d.l = sk->outbuf.d.f = new;
583 sk->outbuf.d.l->next = new;
584 sk->outbuf.d.l = new;
590 size_t sockgetdatalen(struct socket *sk)
598 ret = sk->inbuf.s.datasize;
602 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
609 size_t sockqueuesize(struct socket *sk)
617 ret = sk->outbuf.s.datasize;
621 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
629 * Seriously, I don't know if it's naughty or not to remove
630 * pre-existing Unix sockets.
632 static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen)
634 struct sockaddr_un *un;
637 if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX))
639 un = (struct sockaddr_un *)name;
640 if(stat(un->sun_path, &sb))
642 if(!S_ISSOCK(sb.st_mode))
644 if(unlink(un->sun_path))
646 if(bind(sk->fd, name, namelen) < 0)
652 * The difference between netcslisten() and netcslistenlocal() is that
653 * netcslistenlocal() always listens on the local host, instead of
654 * following proxy/passive mode directions. It is suitable for eg. the
655 * UI channel, while the file sharing networks should, naturally, use
656 * netcslisten() instead.
659 struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
664 /* I don't know if this is actually correct (it probably isn't),
665 * but since, at on least Linux systems, PF_* are specifically
666 * #define'd to their AF_* counterparts, it allows for a severely
667 * smoother implementation. If it breaks something on your
668 * platform, please tell me so.
670 if((sk = mksock(name->sa_family, type)) == NULL)
672 sk->state = SOCK_LST;
673 if(confgetint("net", "reuseaddr"))
676 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
678 if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0)))
683 if(listen(sk->fd, 16) < 0)
693 struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
695 if(confgetint("net", "mode") == 1)
700 if(confgetint("net", "mode") == 0)
701 return(netcslistenlocal(type, name, namelen, func, data));
706 struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
708 struct sockaddr_in addr;
710 struct sockaddr_in6 addr6;
712 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
716 csfunc = netcslistenlocal;
718 csfunc = netcslisten;
720 memset(&addr6, 0, sizeof(addr6));
721 addr6.sin6_family = AF_INET6;
722 addr6.sin6_port = htons(port);
723 addr6.sin6_addr = in6addr_any;
724 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
726 if((ret == NULL) && (errno != EAFNOSUPPORT))
729 memset(&addr, 0, sizeof(addr));
730 addr.sin_family = AF_INET;
731 addr.sin_port = htons(port);
732 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
735 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
740 mode = confgetint("net", "mode");
741 if((mode == 0) || (mode == 1))
743 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
745 if(bind(sk->fd, name, namelen) < 0)
750 sk->state = SOCK_EST;
757 struct socket *netdupsock(struct socket *sk)
759 struct socket *newsk;
761 newsk = newsock(sk->type);
762 if((newsk->fd = dup(sk->fd)) < 0)
764 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
768 newsk->state = sk->state;
769 newsk->ignread = sk->ignread;
770 if(sk->remote != NULL)
771 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
775 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
777 if(sk->remote != NULL)
779 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
783 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
788 mode = confgetint("net", "mode");
789 if((mode == 0) || (mode == 1))
791 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
793 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
794 if(!connect(sk->fd, addr, addrlen))
796 sk->state = SOCK_EST;
800 if(errno == EINPROGRESS)
802 sk->state = SOCK_SYN;
814 static void acceptunix(struct socket *sk)
819 if(setsockopt(sk->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0)
820 flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", sk->fd, strerror(errno));
823 int pollsocks(int timeout)
829 struct socket *sk, *next, *newsk;
830 struct sockaddr_storage ss;
833 pfds = smalloc(sizeof(*pfds) * (num = numsocks));
834 for(i = 0, sk = sockets; i < num; sk = sk->next)
836 if(sk->state == SOCK_STL)
844 pfds[i].events |= POLLIN;
845 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
846 pfds[i].events |= POLLOUT;
850 ret = poll(pfds, num, timeout);
855 flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno));
856 /* To avoid CPU hogging in case it's bad, which it
863 for(sk = sockets; sk != NULL; sk = next)
866 for(i = 0; i < num; i++)
868 if(pfds[i].fd == sk->fd)
876 if(pfds[i].revents & POLLIN)
879 if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0)
881 if(sk->errcb != NULL)
882 sk->errcb(sk, errno, sk->data);
884 newsk = newsock(sk->type);
886 newsk->family = sk->family;
887 newsk->state = SOCK_EST;
888 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
889 newsk->remotelen = sslen;
890 if(ss.ss_family == PF_UNIX)
892 if(sk->acceptcb != NULL)
893 sk->acceptcb(sk, newsk, sk->data);
896 if(pfds[i].revents & POLLERR)
898 retlen = sizeof(ret);
899 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
900 if(sk->errcb != NULL)
901 sk->errcb(sk, ret, sk->data);
906 if(pfds[i].revents & POLLERR)
908 retlen = sizeof(ret);
909 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
910 if(sk->conncb != NULL)
911 sk->conncb(sk, ret, sk->data);
915 if(pfds[i].revents & (POLLIN | POLLOUT))
917 sk->state = SOCK_EST;
918 if(sk->conncb != NULL)
919 sk->conncb(sk, 0, sk->data);
923 if(pfds[i].revents & POLLERR)
925 retlen = sizeof(ret);
926 getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
927 if(sk->errcb != NULL)
928 sk->errcb(sk, ret, sk->data);
932 if(pfds[i].revents & POLLIN)
934 if(pfds[i].revents & POLLOUT)
936 if(sockqueuesize(sk) > 0)
941 if(pfds[i].revents & POLLNVAL)
943 flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd);
944 sk->state = SOCK_STL;
948 if(pfds[i].revents & POLLHUP)
950 if(sk->errcb != NULL)
951 sk->errcb(sk, 0, sk->data);
958 for(sk = sockets; sk != NULL; sk = next)
961 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
966 if(sk->close && (sockqueuesize(sk) == 0))
968 if(sk->state == SOCK_STL)
977 int socksettos(struct socket *sk, int tos)
981 if(sk->family == AF_UNIX)
982 return(0); /* Unix sockets are always perfect. :) */
983 if(sk->family == AF_INET)
990 case SOCK_TOS_MINCOST:
993 case SOCK_TOS_MAXREL:
999 case SOCK_TOS_MINDELAY:
1003 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
1006 if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0)
1008 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
1013 if(sk->family == AF_INET6)
1019 case SOCK_TOS_MINCOST:
1020 buf = confgetint("net", "diffserv-mincost");
1022 case SOCK_TOS_MAXREL:
1023 buf = confgetint("net", "diffserv-maxrel");
1025 case SOCK_TOS_MAXTP:
1026 buf = confgetint("net", "diffserv-maxtp");
1028 case SOCK_TOS_MINDELAY:
1029 buf = confgetint("net", "diffserv-mindelay");
1032 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
1036 On Linux, the API IPv6 flow label management doesn't seem to
1037 be entirely complete, so I guess this will have to wait.
1039 if(setsockopt(...) < 0)
1041 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
1047 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
1054 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
1056 struct sockaddr_storage addr;
1060 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
1062 static char buf[80];
1064 struct sockaddr_in *ipv4;
1068 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
1071 data->callback(NULL, 0, data->data);
1073 ipv4 = (struct sockaddr_in *)&data->addr;
1074 memcpy(&ipv4->sin_addr, buf, 4);
1075 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
1079 data->callback(NULL, 0, data->data);
1085 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
1092 struct resolvedata *rdata;
1093 struct sockaddr_in ipv4;
1099 if((p = strchr(addr, ':')) != NULL)
1104 ipv4.sin_family = AF_INET;
1105 ipv4.sin_port = htons(port);
1106 if(inet_aton(addr, &ipv4.sin_addr))
1108 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
1110 sigemptyset(&sigset);
1111 sigaddset(&sigset, SIGCHLD);
1112 sigprocmask(SIG_BLOCK, &sigset, NULL);
1113 if((pipe(pfd) < 0) || ((child = fork()) < 0))
1115 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1120 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1121 for(i = 3; i < FD_SETSIZE; i++)
1126 signal(SIGALRM, SIG_DFL);
1128 if((he = gethostbyname(addr)) == NULL)
1130 write(pfd[1], he->h_addr_list[0], 4);
1134 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1135 rdata = smalloc(sizeof(*rdata));
1137 rdata->callback = callback;
1139 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1140 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1141 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1148 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1151 struct sockaddr_storage name;
1154 if((sk->state == SOCK_STL) || (sk->fd < 0))
1157 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1159 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno));
1162 *namebuf = memcpy(smalloc(len), &name, len);
1168 static void sethostaddr(struct sockaddr *dst, struct sockaddr *src)
1170 if(dst->sa_family != src->sa_family)
1172 flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family);
1175 switch(src->sa_family)
1178 ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr;
1181 ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr;
1184 flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family);
1189 static int makepublic(struct sockaddr *addr)
1193 struct sockaddr *pname;
1195 if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0)
1197 flog(LOG_ERR, "could not get public address: %s", strerror(errno));
1202 sethostaddr(addr, pname);
1207 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1210 struct sockaddr *name;
1212 switch(confgetint("net", "mode"))
1216 if((sk->state == SOCK_STL) || (sk->fd < 0))
1221 if(!sockgetlocalname(sk, &name, &len))
1228 flog(LOG_ERR, "could not get remotely accessible name by any means");
1234 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1240 int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf)
1242 struct sockaddr *name1, *name2;
1243 socklen_t len1, len2;
1245 if(sk->family != sk2->family)
1247 flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family);
1250 if(sockgetremotename(sk, &name1, &len1))
1252 if(sockgetremotename(sk2, &name2, &len2)) {
1256 sethostaddr(name1, name2);
1263 int addreq(struct sockaddr *x, struct sockaddr *y)
1265 struct sockaddr_un *u1, *u2;
1266 struct sockaddr_in *n1, *n2;
1268 struct sockaddr_in6 *s1, *s2;
1271 if(x->sa_family != y->sa_family)
1273 switch(x->sa_family) {
1275 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1276 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1280 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1281 if(n1->sin_port != n2->sin_port)
1283 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1288 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1289 if(s1->sin6_port != s2->sin6_port)
1291 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1299 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1301 struct sockaddr_in *ipv4;
1303 struct sockaddr_in6 *ipv6;
1305 static char *ret = NULL;
1311 switch(arg->sa_family)
1314 ret = sstrdup("Unix socket");
1317 ipv4 = (struct sockaddr_in *)arg;
1318 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1320 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1324 ipv6 = (struct sockaddr_in6 *)arg;
1325 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1327 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
1331 errno = EPFNOSUPPORT;
1340 * It was very nice to use this, but it seems
1341 * to mess things up, so I guess it has to go... :-(
1344 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1346 struct sockaddr *arg;
1348 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1349 * lowercase letters to 1, so I do this
1351 struct sockaddr_in *ipv4;
1354 arg = *(struct sockaddr **)(args[0]);
1355 arglen = *(socklen_t *)(args[1]);
1356 switch(arg->sa_family)
1359 UNIX = (struct sockaddr_un *)arg;
1360 ret = fprintf(stream, "%s", UNIX->sun_path);
1363 ipv4 = (struct sockaddr_in *)arg;
1364 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1368 errno = EPFNOSUPPORT;
1374 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1377 argtypes[0] = PA_POINTER;
1379 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1380 * be an int, so I guess this should be
1386 static int init(int hup)
1391 if(register_printf_function('N', formataddress, formataddress_arginfo))
1393 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1401 static void terminate(void)
1403 while(sockets != NULL)
1404 unlinksock(sockets);
1407 static struct module me =
1415 .terminate = terminate