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 /** The Diffserv value to use on IPv6 connections when the
70 * minimize cost TOS value is used (see the TOS VALUES
72 {CONF_VAR_INT, "diffserv-mincost", {.num = 0}},
73 /** The Diffserv value to use on IPv6 connections when the
74 * maximize reliability TOS value is used (see the TOS VALUES
76 {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}},
77 /** The Diffserv value to use on IPv6 connections when the
78 * maximize throughput TOS value is used (see the TOS VALUES
80 {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}},
81 /** The Diffserv value to use on IPv6 connections when the
82 * minimize delay TOS value is used (see the TOS VALUES
84 {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}},
85 /** If enabled, the IP TOS interface will be used to set Diffserv
86 * codepoints on IPv4 sockets, by shifting the DSCP value two bits
87 * to the left (across the ECN bits). This may only work on
89 {CONF_VAR_BOOL, "dscp-tos", {.num = 0}},
93 static struct socket *sockets = NULL;
96 /* XXX: Get autoconf for all this... */
97 int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf)
99 struct sockaddr_in *ipv4;
100 struct configvar *var;
104 struct ifreq *ifr, req;
109 var = confgetvar("net", "visibleipv4");
110 if(var->val.ipv4.s_addr != 0)
112 ipv4 = smalloc(sizeof(*ipv4));
113 ipv4->sin_family = AF_INET;
114 ipv4->sin_addr.s_addr = var->val.ipv4.s_addr;
115 *addr = (struct sockaddr *)ipv4;
116 *lenbuf = sizeof(*ipv4);
119 if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL)
121 flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno));
126 if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
128 conf.ifc_buf = smalloc(conf.ifc_len = 65536);
129 if(ioctl(sock, SIOCGIFCONF, &conf) < 0)
135 bufend = ((char *)conf.ifc_buf) + conf.ifc_len;
137 for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++)
139 if(strcmp(ifr->ifr_name, pif))
141 memset(&req, 0, sizeof(req));
142 memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
143 if(ioctl(sock, SIOCGIFFLAGS, &req) < 0)
145 if(!(req.ifr_flags & IFF_UP))
147 flog(LOG_WARNING, "public interface is down");
150 if(ifr->ifr_addr.sa_family != AF_INET)
152 flog(LOG_WARNING, "address of the public interface is not AF_INET");
155 ipv4 = smalloc(sizeof(*ipv4));
156 memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr));
163 *addr = (struct sockaddr *)ipv4;
164 *lenbuf = sizeof(*ipv4);
173 static struct socket *newsock(int type)
177 new = smalloc(sizeof(*new));
178 memset(new, 0, sizeof(*new));
181 new->isrealsocket = 1;
195 new->outbuf.s.buf = NULL;
196 new->outbuf.s.bufsize = 0;
197 new->outbuf.s.datasize = 0;
198 new->inbuf.s.buf = NULL;
199 new->inbuf.s.bufsize = 0;
200 new->inbuf.s.datasize = 0;
203 new->outbuf.d.f = new->outbuf.d.l = NULL;
204 new->inbuf.d.f = new->inbuf.d.l = NULL;
211 new->acceptcb = NULL;
221 static struct socket *mksock(int domain, int type)
226 if((fd = socket(domain, type, 0)) < 0)
228 flog(LOG_CRIT, "could not create socket: %s", strerror(errno));
233 new->family = domain;
234 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
238 struct socket *wrapsock(int fd)
242 new = newsock(SOCK_STREAM);
244 new->state = SOCK_EST;
245 new->isrealsocket = 0;
246 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
250 static void unlinksock(struct socket *sk)
253 sk->prev->next = sk->next;
255 sk->next->prev = sk->prev;
262 void getsock(struct socket *sk)
267 void putsock(struct socket *sk)
269 struct dgrambuf *buf;
271 if(--(sk->refcount) == 0)
276 if(sk->outbuf.s.buf != NULL)
277 free(sk->outbuf.s.buf);
278 if(sk->inbuf.s.buf != NULL)
279 free(sk->inbuf.s.buf);
282 while((buf = sk->outbuf.d.f) != NULL)
284 sk->outbuf.d.f = buf->next;
289 while((buf = sk->inbuf.d.f) != NULL)
291 sk->inbuf.d.f = buf->next;
299 if(sk->remote != NULL)
305 void sockpushdata(struct socket *sk, void *buf, size_t size)
310 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1);
311 memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize);
312 memcpy(sk->inbuf.s.buf, buf, size);
313 sk->inbuf.s.datasize += size;
322 void *sockgetinbuf(struct socket *sk, size_t *size)
325 struct dgrambuf *dbuf;
330 if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0))
335 buf = sk->inbuf.s.buf;
336 *size = sk->inbuf.s.datasize;
337 sk->inbuf.s.buf = NULL;
338 sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0;
341 if((dbuf = sk->inbuf.d.f) == NULL)
343 sk->inbuf.d.f = dbuf->next;
344 if(dbuf->next == NULL)
345 sk->inbuf.d.l = NULL;
355 static void recvcmsg(struct socket *sk, struct msghdr *msg)
357 struct cmsghdr *cmsg;
359 for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg))
361 #if UNIX_AUTH_STYLE == 1
362 if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS))
365 if(sk->ucred.uid == -1)
367 cred = (struct ucred *)CMSG_DATA(cmsg);
368 sk->ucred.uid = cred->uid;
369 sk->ucred.gid = cred->gid;
376 static void sockrecv(struct socket *sk)
379 struct dgrambuf *dbuf;
384 memset(&msg, 0, sizeof(msg));
385 msg.msg_iov = &bufvec;
387 msg.msg_control = cbuf;
388 msg.msg_controllen = sizeof(cbuf);
392 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
393 /* SIOCINQ is Linux-specific AFAIK, but I really have no idea
394 * how to read the inqueue size on other OSs */
395 if(sk->isrealsocket) {
396 if(ioctl(sk->fd, SIOCINQ, &inq))
398 /* I don't really know what could go wrong here, so let's
399 * assume it's transient. */
400 flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd);
404 /* There are perils when trying to use SIOCINQ on files >2GiB... */
412 sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1);
415 bufvec.iov_base = sk->inbuf.s.buf + sk->inbuf.s.datasize;
416 bufvec.iov_len = inq;
417 ret = recvmsg(sk->fd, &msg, 0);
419 ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq);
420 msg.msg_controllen = 0;
425 if((errno == EINTR) || (errno == EAGAIN))
427 if(sk->errcb != NULL)
428 sk->errcb(sk, errno, sk->data);
432 if(msg.msg_flags & MSG_CTRUNC)
433 flog(LOG_DEBUG, "ancillary data was truncated");
438 if(sk->errcb != NULL)
439 sk->errcb(sk, 0, sk->data);
443 sk->inbuf.s.datasize += ret;
444 if(sk->readcb != NULL)
445 sk->readcb(sk, sk->data);
448 #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ)
449 if(ioctl(sk->fd, SIOCINQ, &inq))
451 /* I don't really know what could go wrong here, so let's
452 * assume it's transient. */
453 flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd);
459 dbuf = smalloc(sizeof(*dbuf));
460 dbuf->data = smalloc(inq);
461 dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage));
463 ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen);
465 msg.msg_name = dbuf->addr;
466 msg.msg_namelen = dbuf->addrlen;
467 bufvec.iov_base = dbuf->data;
468 bufvec.iov_len = inq;
469 ret = recvmsg(sk->fd, &msg, 0);
470 dbuf->addrlen = msg.msg_namelen;
476 if((errno == EINTR) || (errno == EAGAIN))
478 if(sk->errcb != NULL)
479 sk->errcb(sk, errno, sk->data);
483 if(msg.msg_flags & MSG_CTRUNC)
484 flog(LOG_DEBUG, "ancillary data was truncated");
487 /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't
488 * have EOF), but rather an empty packet. I don't know if any
489 * other potential DGRAM protocols might have an EOF
490 * condition, so let's play safe. */
496 if(!((sk->family == AF_INET) || (sk->family == AF_INET6)))
498 if(sk->errcb != NULL)
499 sk->errcb(sk, 0, sk->data);
504 dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen);
505 dbuf->data = srealloc(dbuf->data, dbuf->size = ret);
507 if(sk->inbuf.d.l != NULL)
508 sk->inbuf.d.l->next = dbuf;
510 sk->inbuf.d.f = dbuf;
511 sk->inbuf.d.l = dbuf;
512 if(sk->readcb != NULL)
513 sk->readcb(sk, sk->data);
518 static void sockflush(struct socket *sk)
521 struct dgrambuf *dbuf;
527 ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL);
529 ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize);
532 if((errno != EINTR) && (errno != EAGAIN))
534 if(sk->errcb != NULL)
535 sk->errcb(sk, errno, sk->data);
542 memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret);
543 if(sk->writecb != NULL)
544 sk->writecb(sk, sk->data);
548 dbuf = sk->outbuf.d.f;
549 if((sk->outbuf.d.f = dbuf->next) == NULL)
550 sk->outbuf.d.l = NULL;
551 sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen);
555 if(sk->writecb != NULL)
556 sk->writecb(sk, sk->data);
561 void closesock(struct socket *sk)
563 struct sockaddr_un *un;
565 if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX))
567 if((sk->state == SOCK_LST) && strchr(un->sun_path, '/'))
569 if(unlink(un->sun_path))
570 flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno));
573 sk->state = SOCK_STL;
579 void sockqueue(struct socket *sk, void *data, size_t size)
581 struct dgrambuf *new;
583 if(sk->state == SOCK_STL)
588 sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1);
589 memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size);
590 sk->outbuf.s.datasize += size;
593 if(sk->remote == NULL)
595 new = smalloc(sizeof(*new));
597 memcpy(new->data = smalloc(size), data, new->size = size);
598 memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen);
599 if(sk->outbuf.d.l == NULL)
601 sk->outbuf.d.l = sk->outbuf.d.f = new;
603 sk->outbuf.d.l->next = new;
604 sk->outbuf.d.l = new;
610 size_t sockgetdatalen(struct socket *sk)
618 ret = sk->inbuf.s.datasize;
622 for(b = sk->inbuf.d.f; b != NULL; b = b->next)
629 size_t sockqueuesize(struct socket *sk)
637 ret = sk->outbuf.s.datasize;
641 for(b = sk->outbuf.d.f; b != NULL; b = b->next)
649 * Seriously, I don't know if it's naughty or not to remove
650 * pre-existing Unix sockets.
652 static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen)
654 struct sockaddr_un *un;
657 if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX))
659 un = (struct sockaddr_un *)name;
660 if(stat(un->sun_path, &sb))
662 if(!S_ISSOCK(sb.st_mode))
664 if(unlink(un->sun_path))
666 if(bind(sk->fd, name, namelen) < 0)
672 * The difference between netcslisten() and netcslistenlocal() is that
673 * netcslistenlocal() always listens on the local host, instead of
674 * following proxy/passive mode directions. It is suitable for eg. the
675 * UI channel, while the file sharing networks should, naturally, use
676 * netcslisten() instead.
679 struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
684 /* I don't know if this is actually correct (it probably isn't),
685 * but since, at on least Linux systems, PF_* are specifically
686 * #define'd to their AF_* counterparts, it allows for a severely
687 * smoother implementation. If it breaks something on your
688 * platform, please tell me so.
690 if((sk = mksock(name->sa_family, type)) == NULL)
692 sk->state = SOCK_LST;
693 if(confgetint("net", "reuseaddr"))
696 setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf));
698 if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0)))
703 if(listen(sk->fd, 16) < 0)
713 struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data)
715 if(confgetint("net", "mode") == 1)
720 if(confgetint("net", "mode") == 0)
721 return(netcslistenlocal(type, name, namelen, func, data));
726 struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data)
728 struct sockaddr_in addr;
730 struct sockaddr_in6 addr6;
732 struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *);
736 csfunc = netcslistenlocal;
738 csfunc = netcslisten;
740 memset(&addr6, 0, sizeof(addr6));
741 addr6.sin6_family = AF_INET6;
742 addr6.sin6_port = htons(port);
743 addr6.sin6_addr = in6addr_any;
744 if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL)
746 if((ret == NULL) && (errno != EAFNOSUPPORT))
749 memset(&addr, 0, sizeof(addr));
750 addr.sin_family = AF_INET;
751 addr.sin_port = htons(port);
752 return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data));
755 struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen)
760 mode = confgetint("net", "mode");
761 if((mode == 0) || (mode == 1))
763 if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL)
765 if(bind(sk->fd, name, namelen) < 0)
770 sk->state = SOCK_EST;
777 struct socket *netdupsock(struct socket *sk)
779 struct socket *newsk;
781 newsk = newsock(sk->type);
782 if((newsk->fd = dup(sk->fd)) < 0)
784 flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno));
788 newsk->state = sk->state;
789 newsk->ignread = sk->ignread;
790 if(sk->remote != NULL)
791 memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen);
795 void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen)
797 if(sk->remote != NULL)
799 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
803 struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data)
808 mode = confgetint("net", "mode");
809 if((mode == 0) || (mode == 1))
811 if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL)
813 memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen);
814 if(!connect(sk->fd, addr, addrlen))
816 sk->state = SOCK_EST;
820 if(errno == EINPROGRESS)
822 sk->state = SOCK_SYN;
834 static void acceptunix(struct socket *sk)
839 #if UNIX_AUTH_STYLE == 1
840 if(setsockopt(sk->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0)
841 flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", sk->fd, strerror(errno));
842 #elif UNIX_AUTH_STYLE == 2
843 if(getpeereid(sk->fd, &sk->ucred.uid, &sk->ucred.gid) < 0)
845 flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", sk->fd, strerror(errno));
852 int pollsocks(int timeout)
857 fd_set rfds, wfds, efds;
858 struct socket *sk, *next, *newsk;
859 struct sockaddr_storage ss;
866 for(maxfd = 0, sk = sockets; sk != NULL; sk = sk->next)
868 if((sk->state == SOCK_STL) || (sk->fd < 0))
871 FD_SET(sk->fd, &rfds);
872 if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0))
873 FD_SET(sk->fd, &wfds);
874 FD_SET(sk->fd, &efds);
878 tv.tv_sec = timeout / 1000;
879 tv.tv_usec = (timeout % 1000) * 1000;
880 ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv);
885 flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno));
886 /* To avoid CPU hogging in case it's bad, which it
892 for(sk = sockets; sk != NULL; sk = next)
899 if(FD_ISSET(fd, &rfds))
902 if((newfd = accept(fd, (struct sockaddr *)&ss, &sslen)) < 0)
904 if(sk->errcb != NULL)
905 sk->errcb(sk, errno, sk->data);
907 newsk = newsock(sk->type);
909 newsk->family = sk->family;
910 newsk->state = SOCK_EST;
911 memcpy(newsk->remote = smalloc(sslen), &ss, sslen);
912 newsk->remotelen = sslen;
913 if(ss.ss_family == PF_UNIX)
915 if(sk->acceptcb != NULL)
916 sk->acceptcb(sk, newsk, sk->data);
919 if(FD_ISSET(fd, &efds))
921 retlen = sizeof(ret);
922 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
923 if(sk->errcb != NULL)
924 sk->errcb(sk, ret, sk->data);
929 if(FD_ISSET(fd, &efds))
931 retlen = sizeof(ret);
932 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
933 if(sk->conncb != NULL)
934 sk->conncb(sk, ret, sk->data);
938 if(FD_ISSET(fd, &rfds) || FD_ISSET(fd, &wfds))
940 sk->state = SOCK_EST;
941 if(sk->conncb != NULL)
942 sk->conncb(sk, 0, sk->data);
946 if(FD_ISSET(fd, &efds))
948 retlen = sizeof(ret);
949 getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen);
950 if(sk->errcb != NULL)
951 sk->errcb(sk, ret, sk->data);
955 if(FD_ISSET(fd, &rfds))
957 if(FD_ISSET(fd, &wfds))
959 if(sockqueuesize(sk) > 0)
965 for(sk = sockets; sk != NULL; sk = next)
968 if(sk->refcount == 1 && (sockqueuesize(sk) == 0))
973 if(sk->close && (sockqueuesize(sk) == 0))
975 if(sk->state == SOCK_STL)
984 int socksettos(struct socket *sk, int tos)
989 if(sk->family == AF_UNIX)
990 return(0); /* Unix sockets are always perfect. :) */
991 if(sk->family == AF_INET)
993 dscp2tos = confgetint("net", "dscp-tos");
999 case SOCK_TOS_MINCOST:
1001 buf = confgetint("net", "diffserv-mincost") << 2;
1005 case SOCK_TOS_MAXREL:
1007 buf = confgetint("net", "diffserv-maxrel") << 2;
1011 case SOCK_TOS_MAXTP:
1013 buf = confgetint("net", "diffserv-maxtp") << 2;
1017 case SOCK_TOS_MINDELAY:
1019 buf = confgetint("net", "diffserv-mindelay") << 2;
1024 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
1027 if(setsockopt(sk->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0)
1029 flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno));
1034 if(sk->family == AF_INET6)
1040 case SOCK_TOS_MINCOST:
1041 buf = confgetint("net", "diffserv-mincost");
1043 case SOCK_TOS_MAXREL:
1044 buf = confgetint("net", "diffserv-maxrel");
1046 case SOCK_TOS_MAXTP:
1047 buf = confgetint("net", "diffserv-maxtp");
1049 case SOCK_TOS_MINDELAY:
1050 buf = confgetint("net", "diffserv-mindelay");
1053 flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos);
1057 On Linux, the API IPv6 flow label management doesn't seem to
1058 be entirely complete, so I guess this will have to wait.
1060 if(setsockopt(...) < 0)
1062 flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno));
1068 flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family);
1075 void (*callback)(struct sockaddr *addr, int addrlen, void *data);
1077 struct sockaddr_storage addr;
1081 static void resolvecb(pid_t pid, int status, struct resolvedata *data)
1083 static char buf[80];
1085 struct sockaddr_in *ipv4;
1089 if((ret = read(data->fd, buf, sizeof(buf))) != 4)
1092 data->callback(NULL, 0, data->data);
1094 ipv4 = (struct sockaddr_in *)&data->addr;
1095 memcpy(&ipv4->sin_addr, buf, 4);
1096 data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data);
1100 data->callback(NULL, 0, data->data);
1106 int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data)
1113 struct resolvedata *rdata;
1114 struct sockaddr_in ipv4;
1120 if((p = strchr(addr, ':')) != NULL)
1125 ipv4.sin_family = AF_INET;
1126 ipv4.sin_port = htons(port);
1127 if(inet_aton(addr, &ipv4.sin_addr))
1129 callback((struct sockaddr *)&ipv4, sizeof(ipv4), data);
1131 sigemptyset(&sigset);
1132 sigaddset(&sigset, SIGCHLD);
1133 sigprocmask(SIG_BLOCK, &sigset, NULL);
1134 if((pipe(pfd) < 0) || ((child = fork()) < 0))
1136 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1141 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1142 for(i = 3; i < FD_SETSIZE; i++)
1147 signal(SIGALRM, SIG_DFL);
1149 if((he = gethostbyname(addr)) == NULL)
1151 write(pfd[1], he->h_addr_list[0], 4);
1155 fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK);
1156 rdata = smalloc(sizeof(*rdata));
1158 rdata->callback = callback;
1160 memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4));
1161 childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata);
1162 sigprocmask(SIG_UNBLOCK, &sigset, NULL);
1169 int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1172 struct sockaddr_storage name;
1175 if((sk->state == SOCK_STL) || (sk->fd < 0))
1178 if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0)
1180 flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno));
1183 *namebuf = memcpy(smalloc(len), &name, len);
1189 static void sethostaddr(struct sockaddr *dst, struct sockaddr *src)
1191 if(dst->sa_family != src->sa_family)
1193 flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family);
1196 switch(src->sa_family)
1199 ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr;
1202 ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr;
1205 flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family);
1210 static int makepublic(struct sockaddr *addr)
1214 struct sockaddr *pname;
1216 if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0)
1218 flog(LOG_ERR, "could not get public address: %s", strerror(errno));
1223 sethostaddr(addr, pname);
1228 int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf)
1231 struct sockaddr *name;
1233 switch(confgetint("net", "mode"))
1237 if((sk->state == SOCK_STL) || (sk->fd < 0))
1242 if(!sockgetlocalname(sk, &name, &len))
1249 flog(LOG_ERR, "could not get remotely accessible name by any means");
1255 flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode"));
1261 int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf)
1263 struct sockaddr *name1, *name2;
1264 socklen_t len1, len2;
1266 if(sk->family != sk2->family)
1268 flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family);
1271 if(sockgetremotename(sk, &name1, &len1))
1273 if(sockgetremotename(sk2, &name2, &len2)) {
1277 sethostaddr(name1, name2);
1284 int addreq(struct sockaddr *x, struct sockaddr *y)
1286 struct sockaddr_un *u1, *u2;
1287 struct sockaddr_in *n1, *n2;
1289 struct sockaddr_in6 *s1, *s2;
1292 if(x->sa_family != y->sa_family)
1294 switch(x->sa_family) {
1296 u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y;
1297 if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path)))
1301 n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y;
1302 if(n1->sin_port != n2->sin_port)
1304 if(n1->sin_addr.s_addr != n2->sin_addr.s_addr)
1309 s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y;
1310 if(s1->sin6_port != s2->sin6_port)
1312 if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr)))
1320 char *formataddress(struct sockaddr *arg, socklen_t arglen)
1322 struct sockaddr_in *ipv4;
1324 struct sockaddr_in6 *ipv6;
1326 static char *ret = NULL;
1332 switch(arg->sa_family)
1335 ret = sstrdup("Unix socket");
1338 ipv4 = (struct sockaddr_in *)arg;
1339 if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL)
1341 ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port));
1345 ipv6 = (struct sockaddr_in6 *)arg;
1346 if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL)
1348 ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port));
1352 errno = EPFNOSUPPORT;
1361 * It was very nice to use this, but it seems
1362 * to mess things up, so I guess it has to go... :-(
1365 static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args)
1367 struct sockaddr *arg;
1369 struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with
1370 * lowercase letters to 1, so I do this
1372 struct sockaddr_in *ipv4;
1375 arg = *(struct sockaddr **)(args[0]);
1376 arglen = *(socklen_t *)(args[1]);
1377 switch(arg->sa_family)
1380 UNIX = (struct sockaddr_un *)arg;
1381 ret = fprintf(stream, "%s", UNIX->sun_path);
1384 ipv4 = (struct sockaddr_in *)arg;
1385 ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port));
1389 errno = EPFNOSUPPORT;
1395 static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes)
1398 argtypes[0] = PA_POINTER;
1400 argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_
1401 * be an int, so I guess this should be
1407 static int init(int hup)
1412 if(register_printf_function('N', formataddress, formataddress_arginfo))
1414 flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno));
1422 static void terminate(void)
1424 while(sockets != NULL)
1425 unlinksock(sockets);
1428 static struct module me =
1436 .terminate = terminate