/* * Copyright (c) 2002, 2025, Oracle and/or its affiliates. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ /* Copyright 1993, 1994, 1998 The Open Group Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of the copyright holders shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from the copyright holders. * Copyright 1993, 1994 NCR Corporation - Dayton, Ohio, USA * * All Rights Reserved * * Permission to use, copy, modify, and distribute this software and its * documentation for any purpose and without fee is hereby granted, provided * that the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name NCR not be used in advertising * or publicity pertaining to distribution of the software without specific, * written prior permission. NCR makes no representations about the * suitability of this software for any purpose. It is provided "as is" * without express or implied warranty. * * NCR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN * NO EVENT SHALL NCR BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #ifdef XTHREADS #include #endif #ifndef WIN32 #if defined(TCPCONN) || defined(UNIXCONN) #include #include #include #endif #if defined(TCPCONN) || defined(UNIXCONN) #define X_INCLUDE_NETDB_H #define XOS_USE_NO_LOCKING #include #endif #ifdef UNIXCONN #include #include #endif #ifndef NO_TCP_H #if defined(linux) || defined(__GLIBC__) #include #endif /* osf */ #if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) #include #include #endif /* __NetBSD__ || __OpenBSD__ || __FreeBSD__ || __DragonFly__ */ #include #endif /* !NO_TCP_H */ #include #if defined(SVR4) || defined(__SVR4) #include #endif #include #else /* !WIN32 */ #include #include #include #undef close #define close closesocket #define ECONNREFUSED WSAECONNREFUSED #define EADDRINUSE WSAEADDRINUSE #define EPROTOTYPE WSAEPROTOTYPE #undef EWOULDBLOCK #define EWOULDBLOCK WSAEWOULDBLOCK #define EINPROGRESS WSAEINPROGRESS #undef EINTR #define EINTR WSAEINTR #define X_INCLUDE_NETDB_H #define XOS_USE_MTSAFE_NETDBAPI #include #endif /* WIN32 */ #if defined(SO_DONTLINGER) && defined(SO_LINGER) #undef SO_DONTLINGER #endif /* others don't need this */ #define SocketInitOnce() /**/ #ifdef __linux__ #define HAVE_ABSTRACT_SOCKETS #endif #define MIN_BACKLOG 128 #ifdef SOMAXCONN #if SOMAXCONN > MIN_BACKLOG #define BACKLOG SOMAXCONN #endif #endif #ifndef BACKLOG #define BACKLOG MIN_BACKLOG #endif #if defined(IPv6) && !defined(AF_INET6) #error "Cannot build IPv6 support without AF_INET6" #endif /* Temporary workaround for consumers whose configure scripts were generated with pre-1.6 versions of xtrans.m4 */ #if defined(IPv6) && !defined(HAVE_GETADDRINFO) #define HAVE_GETADDRINFO #endif /* * This is the Socket implementation of the X Transport service layer * * This file contains the implementation for both the UNIX and INET domains, * and can be built for either one, or both. * */ typedef struct _Sockettrans2dev { const char *transname; int family; int devcotsname; int devcltsname; int protocol; } Sockettrans2dev; /* As documented in the X(7) man page: * tcp TCP over IPv4 or IPv6 * inet TCP over IPv4 only * inet6 TCP over IPv6 only * unix UNIX Domain Sockets (same host only) * local Platform preferred local connection method */ static Sockettrans2dev Sockettrans2devtab[] = { #ifdef TCPCONN {"inet",AF_INET,SOCK_STREAM,SOCK_DGRAM,0}, #ifndef IPv6 {"tcp",AF_INET,SOCK_STREAM,SOCK_DGRAM,0}, #else /* IPv6 */ {"tcp",AF_INET6,SOCK_STREAM,SOCK_DGRAM,0}, {"tcp",AF_INET,SOCK_STREAM,SOCK_DGRAM,0}, /* fallback */ {"inet6",AF_INET6,SOCK_STREAM,SOCK_DGRAM,0}, #endif #endif /* TCPCONN */ #ifdef UNIXCONN {"unix",AF_UNIX,SOCK_STREAM,SOCK_DGRAM,0}, #if !defined(LOCALCONN) {"local",AF_UNIX,SOCK_STREAM,SOCK_DGRAM,0}, #endif /* !LOCALCONN */ #endif /* UNIXCONN */ }; #define NUMSOCKETFAMILIES (sizeof(Sockettrans2devtab)/sizeof(Sockettrans2dev)) #ifdef TCPCONN static int TRANS(SocketINETClose) (XtransConnInfo ciptr); #endif static int is_numeric (const char *str) { int i; for (i = 0; i < (int) strlen (str); i++) if (!isdigit (str[i])) return (0); return (1); } #ifdef UNIXCONN #define UNIX_PATH "/tmp/.X11-unix/X" #define UNIX_DIR "/tmp/.X11-unix" #endif /* UNIXCONN */ #define PORTBUFSIZE 32 #ifndef MAXHOSTNAMELEN #define MAXHOSTNAMELEN 255 #endif #if defined(HAVE_SOCKLEN_T) || defined(IPv6) # define SOCKLEN_T socklen_t #elif defined(SVR4) || defined(__SVR4) # define SOCKLEN_T size_t #else # define SOCKLEN_T int #endif /* * These are some utility function used by the real interface function below. */ static int TRANS(SocketSelectFamily) (int first, const char *family) { int i; prmsg (3,"SocketSelectFamily(%s)\n", family); for (i = first + 1; i < (int)NUMSOCKETFAMILIES; i++) { if (!strcmp (family, Sockettrans2devtab[i].transname)) return i; } return (first == -1 ? -2 : -1); } /* * This function gets the local address of the socket and stores it in the * XtransConnInfo structure for the connection. */ static int TRANS(SocketINETGetAddr) (XtransConnInfo ciptr) { #ifdef HAVE_STRUCT_SOCKADDR_STORAGE struct sockaddr_storage sockname; #else struct sockaddr_in sockname; #endif void *socknamePtr = &sockname; SOCKLEN_T namelen = sizeof(sockname); prmsg (3,"SocketINETGetAddr(%p)\n", (void *) ciptr); memset(socknamePtr, 0, namelen); if (getsockname (ciptr->fd,(struct sockaddr *) socknamePtr, (void *)&namelen) < 0) { #ifdef WIN32 errno = WSAGetLastError(); #endif prmsg (1,"SocketINETGetAddr: getsockname() failed: %d\n", EGET()); return -1; } /* * Everything looks good: fill in the XtransConnInfo structure. */ if ((ciptr->addr = malloc (namelen)) == NULL) { prmsg (1, "SocketINETGetAddr: Can't allocate space for the addr\n"); return -1; } ciptr->family = ((struct sockaddr *)socknamePtr)->sa_family; ciptr->addrlen = namelen; memcpy (ciptr->addr, socknamePtr, ciptr->addrlen); return 0; } /* * This function gets the remote address of the socket and stores it in the * XtransConnInfo structure for the connection. */ static int TRANS(SocketINETGetPeerAddr) (XtransConnInfo ciptr) { #ifdef HAVE_STRUCT_SOCKADDR_STORAGE struct sockaddr_storage sockname; #else struct sockaddr_in sockname; #endif void *socknamePtr = &sockname; SOCKLEN_T namelen = sizeof(sockname); memset(socknamePtr, 0, namelen); prmsg (3,"SocketINETGetPeerAddr(%p)\n", (void *) ciptr); if (getpeername (ciptr->fd, (struct sockaddr *) socknamePtr, (void *)&namelen) < 0) { #ifdef WIN32 errno = WSAGetLastError(); #endif prmsg (1,"SocketINETGetPeerAddr: getpeername() failed: %d\n", EGET()); return -1; } /* * Everything looks good: fill in the XtransConnInfo structure. */ if ((ciptr->peeraddr = malloc (namelen)) == NULL) { prmsg (1, "SocketINETGetPeerAddr: Can't allocate space for the addr\n"); return -1; } ciptr->peeraddrlen = namelen; memcpy (ciptr->peeraddr, socknamePtr, ciptr->peeraddrlen); return 0; } static XtransConnInfo TRANS(SocketOpen) (int i, int type) { XtransConnInfo ciptr; prmsg (3,"SocketOpen(%d,%d)\n", i, type); if ((ciptr = calloc (1, sizeof(struct _XtransConnInfo))) == NULL) { prmsg (1, "SocketOpen: malloc failed\n"); return NULL; } ciptr->fd = socket(Sockettrans2devtab[i].family, type, Sockettrans2devtab[i].protocol); #ifndef WIN32 #if !defined(USE_POLL) if (ciptr->fd >= sysconf(_SC_OPEN_MAX)) { prmsg (2, "SocketOpen: socket() returned out of range fd %d\n", ciptr->fd); close (ciptr->fd); ciptr->fd = -1; } #endif #endif if (ciptr->fd < 0) { #ifdef WIN32 errno = WSAGetLastError(); #endif prmsg (2, "SocketOpen: socket() failed for %s\n", Sockettrans2devtab[i].transname); free (ciptr); return NULL; } #ifdef TCP_NODELAY if (Sockettrans2devtab[i].family == AF_INET #ifdef IPv6 || Sockettrans2devtab[i].family == AF_INET6 #endif ) { /* * turn off TCP coalescence for INET sockets */ int tmp = 1; setsockopt (ciptr->fd, IPPROTO_TCP, TCP_NODELAY, (char *) &tmp, sizeof (int)); } #endif /* * Some systems provide a really small default buffer size for * UNIX sockets. Bump it up a bit such that large transfers don't * proceed at glacial speed. */ #ifdef SO_SNDBUF if (Sockettrans2devtab[i].family == AF_UNIX) { SOCKLEN_T len = sizeof (int); int val; if (getsockopt (ciptr->fd, SOL_SOCKET, SO_SNDBUF, (char *) &val, &len) == 0 && val < 64 * 1024) { val = 64 * 1024; setsockopt (ciptr->fd, SOL_SOCKET, SO_SNDBUF, (char *) &val, sizeof (int)); } } #endif return ciptr; } static XtransConnInfo TRANS(SocketReopen) (int i _X_UNUSED, int type, int fd, const char *port) { XtransConnInfo ciptr; int portlen; struct sockaddr *addr; size_t addrlen; prmsg (3,"SocketReopen(%d,%d,%s)\n", type, fd, port); if (port == NULL) { prmsg (1, "SocketReopen: port was null!\n"); return NULL; } portlen = strlen(port) + 1; // include space for trailing null #ifdef SOCK_MAXADDRLEN if (portlen < 0 || portlen > (SOCK_MAXADDRLEN + 2)) { prmsg (1, "SocketReopen: invalid portlen %d\n", portlen); return NULL; } if (portlen < 14) portlen = 14; #else if (portlen < 0 || portlen > 14) { prmsg (1, "SocketReopen: invalid portlen %d\n", portlen); return NULL; } #endif /*SOCK_MAXADDRLEN*/ if ((ciptr = calloc (1, sizeof(struct _XtransConnInfo))) == NULL) { prmsg (1, "SocketReopen: malloc(ciptr) failed\n"); return NULL; } ciptr->fd = fd; addrlen = portlen + offsetof(struct sockaddr, sa_data); if ((addr = calloc (1, addrlen)) == NULL) { prmsg (1, "SocketReopen: malloc(addr) failed\n"); free (ciptr); return NULL; } ciptr->addr = (char *) addr; ciptr->addrlen = addrlen; if ((ciptr->peeraddr = calloc (1, addrlen)) == NULL) { prmsg (1, "SocketReopen: malloc(portaddr) failed\n"); free (addr); free (ciptr); return NULL; } ciptr->peeraddrlen = addrlen; /* Initialize ciptr structure as if it were a normally-opened unix socket */ ciptr->flags = TRANS_LOCAL | TRANS_NOUNLINK; #ifdef BSD44SOCKETS addr->sa_len = addrlen; #endif addr->sa_family = AF_UNIX; #if defined(HAVE_STRLCPY) || defined(HAS_STRLCPY) strlcpy(addr->sa_data, port, portlen); #else strncpy(addr->sa_data, port, portlen); #endif ciptr->family = AF_UNIX; memcpy(ciptr->peeraddr, ciptr->addr, addrlen); ciptr->port = rindex(addr->sa_data, ':'); if (ciptr->port == NULL) { if (is_numeric(addr->sa_data)) { ciptr->port = addr->sa_data; } } else if (ciptr->port[0] == ':') { ciptr->port++; } /* port should now point to portnum or NULL */ return ciptr; } /* * These functions are the interface supplied in the Xtransport structure */ static XtransConnInfo TRANS(SocketOpenCOTSServer) (Xtransport *thistrans, const char *protocol, const char *host, const char *port) { XtransConnInfo ciptr = NULL; int i = -1; prmsg (2,"SocketOpenCOTSServer(%s,%s,%s)\n", protocol, host, port); SocketInitOnce(); while ((i = TRANS(SocketSelectFamily) (i, thistrans->TransName)) >= 0) { if ((ciptr = TRANS(SocketOpen) ( i, Sockettrans2devtab[i].devcotsname)) != NULL) break; } if (i < 0) { if (i == -1) { if (errno == EAFNOSUPPORT) { thistrans->flags |= TRANS_NOLISTEN; prmsg (1,"SocketOpenCOTSServer: Socket for %s unsupported on this system.\n", thistrans->TransName); } else { prmsg (1,"SocketOpenCOTSServer: Unable to open socket for %s\n", thistrans->TransName); } } else { prmsg (1,"SocketOpenCOTSServer: Unable to determine socket type for %s\n", thistrans->TransName); } return NULL; } /* * Using this prevents the bind() check for an existing server listening * on the same port, but it is required for other reasons. */ #ifdef SO_REUSEADDR /* * SO_REUSEADDR only applied to AF_INET && AF_INET6 */ if (Sockettrans2devtab[i].family == AF_INET #ifdef IPv6 || Sockettrans2devtab[i].family == AF_INET6 #endif ) { int one = 1; setsockopt (ciptr->fd, SOL_SOCKET, SO_REUSEADDR, (char *) &one, sizeof (int)); } #endif #ifdef IPV6_V6ONLY if (Sockettrans2devtab[i].family == AF_INET6) { int one = 1; setsockopt(ciptr->fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(int)); } #endif /* Save the index for later use */ ciptr->index = i; return ciptr; } static XtransConnInfo TRANS(SocketReopenCOTSServer) (Xtransport *thistrans, int fd, const char *port) { XtransConnInfo ciptr; int i = -1; prmsg (2, "SocketReopenCOTSServer(%d, %s)\n", fd, port); SocketInitOnce(); while ((i = TRANS(SocketSelectFamily) (i, thistrans->TransName)) >= 0) { if ((ciptr = TRANS(SocketReopen) ( i, Sockettrans2devtab[i].devcotsname, fd, port)) != NULL) break; } if (i < 0) { if (i == -1) prmsg (1,"SocketReopenCOTSServer: Unable to open socket for %s\n", thistrans->TransName); else prmsg (1,"SocketReopenCOTSServer: Unable to determine socket type for %s\n", thistrans->TransName); return NULL; } /* Save the index for later use */ ciptr->index = i; return ciptr; } static int TRANS(SocketSetOption) (XtransConnInfo ciptr, int option, int arg) { prmsg (2,"SocketSetOption(%d,%d,%d)\n", ciptr->fd, option, arg); return -1; } #ifdef UNIXCONN static int set_sun_path(const char *port, const char *upath, char *path, int abstract) { struct sockaddr_un s; ssize_t maxlen = sizeof(s.sun_path) - 1; const char *at = ""; if (!port || !*port || !path) return -1; #ifdef HAVE_ABSTRACT_SOCKETS if (port[0] == '@') upath = ""; else if (abstract) at = "@"; #endif if (*port == '/') /* a full pathname */ upath = ""; if ((ssize_t)(strlen(at) + strlen(upath) + strlen(port)) > maxlen) return -1; snprintf(path, sizeof(s.sun_path), "%s%s%s", at, upath, port); return 0; } #endif static int TRANS(SocketCreateListener) (XtransConnInfo ciptr, struct sockaddr *sockname, int socknamelen, unsigned int flags) { SOCKLEN_T namelen = socknamelen; int fd = ciptr->fd; int retry; prmsg (3, "SocketCreateListener(%p,%d)\n", (void *) ciptr, fd); if (Sockettrans2devtab[ciptr->index].family == AF_INET #ifdef IPv6 || Sockettrans2devtab[ciptr->index].family == AF_INET6 #endif ) retry = 20; else retry = 0; while (bind (fd, sockname, namelen) < 0) { if (errno == EADDRINUSE) { if (flags & ADDR_IN_USE_ALLOWED) break; else return TRANS_ADDR_IN_USE; } if (retry-- == 0) { prmsg (1, "SocketCreateListener: failed to bind listener\n"); close (fd); return TRANS_CREATE_LISTENER_FAILED; } #ifdef SO_REUSEADDR sleep (1); #else sleep (10); #endif /* SO_REUSEDADDR */ } if (Sockettrans2devtab[ciptr->index].family == AF_INET #ifdef IPv6 || Sockettrans2devtab[ciptr->index].family == AF_INET6 #endif ) { #ifdef SO_DONTLINGER setsockopt (fd, SOL_SOCKET, SO_DONTLINGER, (char *) NULL, 0); #else #ifdef SO_LINGER { static int linger[2] = { 0, 0 }; setsockopt (fd, SOL_SOCKET, SO_LINGER, (char *) linger, sizeof (linger)); } #endif #endif } if (listen (fd, BACKLOG) < 0) { prmsg (1, "SocketCreateListener: listen() failed\n"); close (fd); return TRANS_CREATE_LISTENER_FAILED; } /* Set a flag to indicate that this connection is a listener */ ciptr->flags = 1 | (ciptr->flags & TRANS_KEEPFLAGS); return 0; } #ifdef TCPCONN static int TRANS(SocketINETCreateListener) (XtransConnInfo ciptr, const char *port, unsigned int flags) { #ifdef HAVE_STRUCT_SOCKADDR_STORAGE struct sockaddr_storage sockname; #else struct sockaddr_in sockname; #endif unsigned short sport; SOCKLEN_T namelen = sizeof(sockname); int status; long tmpport; #ifdef XTHREADS_NEEDS_BYNAMEPARAMS _Xgetservbynameparams sparams; #endif struct servent *servp; char portbuf[PORTBUFSIZE]; prmsg (2, "SocketINETCreateListener(%s)\n", port); /* * X has a well known port, that is transport dependent. It is easier * to handle it here, than try and come up with a transport independent * representation that can be passed in and resolved the usual way. * * The port that is passed here is really a string containing the idisplay * from ConnectDisplay(). */ if (is_numeric (port)) { /* fixup the server port address */ tmpport = X_TCP_PORT + strtol (port, (char**)NULL, 10); snprintf (portbuf, sizeof(portbuf), "%lu", tmpport); port = portbuf; } if (port && *port) { /* Check to see if the port string is just a number (handles X11) */ if (!is_numeric (port)) { if ((servp = _XGetservbyname (port,"tcp",sparams)) == NULL) { prmsg (1, "SocketINETCreateListener: Unable to get service for %s\n", port); return TRANS_CREATE_LISTENER_FAILED; } /* we trust getservbyname to return a valid number */ sport = servp->s_port; } else { tmpport = strtol (port, (char**)NULL, 10); /* * check that somehow the port address isn't negative or in * the range of reserved port addresses. This can happen and * be very bad if the server is suid-root and the user does * something (dumb) like `X :60049`. */ if (tmpport < 1024 || tmpport > USHRT_MAX) return TRANS_CREATE_LISTENER_FAILED; sport = (unsigned short) tmpport; } } else sport = 0; memset(&sockname, 0, sizeof(sockname)); if (Sockettrans2devtab[ciptr->index].family == AF_INET) { namelen = sizeof (struct sockaddr_in); #ifdef BSD44SOCKETS ((struct sockaddr_in *)&sockname)->sin_len = namelen; #endif ((struct sockaddr_in *)&sockname)->sin_family = AF_INET; ((struct sockaddr_in *)&sockname)->sin_port = htons(sport); ((struct sockaddr_in *)&sockname)->sin_addr.s_addr = htonl(INADDR_ANY); } else { #ifdef IPv6 namelen = sizeof (struct sockaddr_in6); #ifdef SIN6_LEN ((struct sockaddr_in6 *)&sockname)->sin6_len = sizeof(sockname); #endif ((struct sockaddr_in6 *)&sockname)->sin6_family = AF_INET6; ((struct sockaddr_in6 *)&sockname)->sin6_port = htons(sport); ((struct sockaddr_in6 *)&sockname)->sin6_addr = in6addr_any; #else prmsg (1, "SocketINETCreateListener: unsupported address family %d\n", Sockettrans2devtab[ciptr->index].family); return TRANS_CREATE_LISTENER_FAILED; #endif } if ((status = TRANS(SocketCreateListener) (ciptr, (struct sockaddr *) &sockname, namelen, flags)) < 0) { prmsg (1, "SocketINETCreateListener: ...SocketCreateListener() failed\n"); return status; } if (TRANS(SocketINETGetAddr) (ciptr) < 0) { prmsg (1, "SocketINETCreateListener: ...SocketINETGetAddr() failed\n"); return TRANS_CREATE_LISTENER_FAILED; } return 0; } #endif /* TCPCONN */ #ifdef UNIXCONN static int TRANS(SocketUNIXCreateListener) (XtransConnInfo ciptr, const char *port, unsigned int flags) { struct sockaddr_un sockname; int namelen; int oldUmask; int status; unsigned int mode; char tmpport[108]; int abstract = 0; #ifdef HAVE_ABSTRACT_SOCKETS abstract = ciptr->transptr->flags & TRANS_ABSTRACT; #endif prmsg (2, "SocketUNIXCreateListener(%s)\n", port ? port : "NULL"); /* Make sure the directory is created */ oldUmask = umask (0); #ifdef UNIX_DIR #ifdef HAS_STICKY_DIR_BIT mode = 01777; #else mode = 0777; #endif if (!abstract && trans_mkdir(UNIX_DIR, mode) == -1) { prmsg (1, "SocketUNIXCreateListener: mkdir(%s) failed, errno = %d\n", UNIX_DIR, errno); (void) umask (oldUmask); return TRANS_CREATE_LISTENER_FAILED; } #endif memset(&sockname, 0, sizeof(sockname)); sockname.sun_family = AF_UNIX; if (!(port && *port)) { snprintf (tmpport, sizeof(tmpport), "%s%ld", UNIX_PATH, (long)getpid()); port = tmpport; } if (set_sun_path(port, UNIX_PATH, sockname.sun_path, abstract) != 0) { prmsg (1, "SocketUNIXCreateListener: path too long\n"); return TRANS_CREATE_LISTENER_FAILED; } #if defined(BSD44SOCKETS) sockname.sun_len = strlen(sockname.sun_path); #endif #if defined(BSD44SOCKETS) || defined(SUN_LEN) namelen = SUN_LEN(&sockname); #else namelen = strlen(sockname.sun_path) + offsetof(struct sockaddr_un, sun_path); #endif if (abstract) { sockname.sun_path[0] = '\0'; namelen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&sockname.sun_path[1]); } else unlink (sockname.sun_path); if ((status = TRANS(SocketCreateListener) (ciptr, (struct sockaddr *) &sockname, namelen, flags)) < 0) { prmsg (1, "SocketUNIXCreateListener: ...SocketCreateListener() failed\n"); (void) umask (oldUmask); return status; } /* * Now that the listener is esablished, create the addr info for * this connection. getpeername() doesn't work for UNIX Domain Sockets * on some systems (hpux at least), so we will just do it manually, instead * of calling something like TRANS(SocketUNIXGetAddr). */ namelen = sizeof (sockname); /* this will always make it the same size */ if ((ciptr->addr = malloc (namelen)) == NULL) { prmsg (1, "SocketUNIXCreateListener: Can't allocate space for the addr\n"); (void) umask (oldUmask); return TRANS_CREATE_LISTENER_FAILED; } if (abstract) sockname.sun_path[0] = '@'; ciptr->family = sockname.sun_family; ciptr->addrlen = namelen; memcpy (ciptr->addr, &sockname, ciptr->addrlen); (void) umask (oldUmask); return 0; } static int TRANS(SocketUNIXResetListener) (XtransConnInfo ciptr) { /* * See if the unix domain socket has disappeared. If it has, recreate it. */ struct sockaddr_un *unsock = (struct sockaddr_un *) ciptr->addr; struct stat statb; int status = TRANS_RESET_NOOP; unsigned int mode; int abstract = 0; #ifdef HAVE_ABSTRACT_SOCKETS abstract = ciptr->transptr->flags & TRANS_ABSTRACT; #endif prmsg (3, "SocketUNIXResetListener(%p,%d)\n", (void *) ciptr, ciptr->fd); if (!abstract && ( stat (unsock->sun_path, &statb) == -1 || ((statb.st_mode & S_IFMT) != #if !defined(S_IFSOCK) S_IFIFO #else S_IFSOCK #endif ))) { int oldUmask = umask (0); #ifdef UNIX_DIR #ifdef HAS_STICKY_DIR_BIT mode = 01777; #else mode = 0777; #endif if (trans_mkdir(UNIX_DIR, mode) == -1) { prmsg (1, "SocketUNIXResetListener: mkdir(%s) failed, errno = %d\n", UNIX_DIR, errno); (void) umask (oldUmask); return TRANS_RESET_FAILURE; } #endif close (ciptr->fd); unlink (unsock->sun_path); if ((ciptr->fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) { TRANS(FreeConnInfo) (ciptr); (void) umask (oldUmask); return TRANS_RESET_FAILURE; } if (bind (ciptr->fd, (struct sockaddr *) unsock, ciptr->addrlen) < 0) { close (ciptr->fd); TRANS(FreeConnInfo) (ciptr); return TRANS_RESET_FAILURE; } if (listen (ciptr->fd, BACKLOG) < 0) { close (ciptr->fd); TRANS(FreeConnInfo) (ciptr); (void) umask (oldUmask); return TRANS_RESET_FAILURE; } umask (oldUmask); status = TRANS_RESET_NEW_FD; } return status; } #endif /* UNIXCONN */ #ifdef TCPCONN static XtransConnInfo TRANS(SocketINETAccept) (XtransConnInfo ciptr, int *status) { XtransConnInfo newciptr; struct sockaddr_in sockname; SOCKLEN_T namelen = sizeof(sockname); prmsg (2, "SocketINETAccept(%p,%d)\n", (void *) ciptr, ciptr->fd); if ((newciptr = calloc (1, sizeof(struct _XtransConnInfo))) == NULL) { prmsg (1, "SocketINETAccept: malloc failed\n"); *status = TRANS_ACCEPT_BAD_MALLOC; return NULL; } if ((newciptr->fd = accept (ciptr->fd, (struct sockaddr *) &sockname, (void *)&namelen)) < 0) { #ifdef WIN32 errno = WSAGetLastError(); #endif prmsg (1, "SocketINETAccept: accept() failed\n"); free (newciptr); *status = TRANS_ACCEPT_FAILED; return NULL; } #ifdef TCP_NODELAY { /* * turn off TCP coalescence for INET sockets */ int tmp = 1; setsockopt (newciptr->fd, IPPROTO_TCP, TCP_NODELAY, (char *) &tmp, sizeof (int)); } #endif /* * Get this address again because the transport may give a more * specific address now that a connection is established. */ if (TRANS(SocketINETGetAddr) (newciptr) < 0) { prmsg (1, "SocketINETAccept: ...SocketINETGetAddr() failed:\n"); close (newciptr->fd); free (newciptr); *status = TRANS_ACCEPT_MISC_ERROR; return NULL; } if (TRANS(SocketINETGetPeerAddr) (newciptr) < 0) { prmsg (1, "SocketINETAccept: ...SocketINETGetPeerAddr() failed:\n"); close (newciptr->fd); if (newciptr->addr) free (newciptr->addr); free (newciptr); *status = TRANS_ACCEPT_MISC_ERROR; return NULL; } *status = 0; return newciptr; } #endif /* TCPCONN */ #ifdef UNIXCONN static XtransConnInfo TRANS(SocketUNIXAccept) (XtransConnInfo ciptr, int *status) { XtransConnInfo newciptr; struct sockaddr_un sockname; SOCKLEN_T namelen = sizeof sockname; prmsg (2, "SocketUNIXAccept(%p,%d)\n", (void *) ciptr, ciptr->fd); if ((newciptr = calloc (1, sizeof(struct _XtransConnInfo))) == NULL) { prmsg (1, "SocketUNIXAccept: malloc() failed\n"); *status = TRANS_ACCEPT_BAD_MALLOC; return NULL; } if ((newciptr->fd = accept (ciptr->fd, (struct sockaddr *) &sockname, (void *)&namelen)) < 0) { prmsg (1, "SocketUNIXAccept: accept() failed\n"); free (newciptr); *status = TRANS_ACCEPT_FAILED; return NULL; } ciptr->addrlen = namelen; /* * Get the socket name and the peer name from the listener socket, * since this is unix domain. */ if ((newciptr->addr = malloc (ciptr->addrlen)) == NULL) { prmsg (1, "SocketUNIXAccept: Can't allocate space for the addr\n"); close (newciptr->fd); free (newciptr); *status = TRANS_ACCEPT_BAD_MALLOC; return NULL; } /* * if the socket is abstract, we already modified the address to have a * @ instead of the initial NUL, so no need to do that again here. */ newciptr->addrlen = ciptr->addrlen; memcpy (newciptr->addr, ciptr->addr, newciptr->addrlen); if ((newciptr->peeraddr = malloc (ciptr->addrlen)) == NULL) { prmsg (1, "SocketUNIXAccept: Can't allocate space for the addr\n"); close (newciptr->fd); if (newciptr->addr) free (newciptr->addr); free (newciptr); *status = TRANS_ACCEPT_BAD_MALLOC; return NULL; } newciptr->peeraddrlen = ciptr->addrlen; memcpy (newciptr->peeraddr, ciptr->addr, newciptr->addrlen); newciptr->family = AF_UNIX; *status = 0; return newciptr; } #endif /* UNIXCONN */ static int TRANS(SocketBytesReadable) (XtransConnInfo ciptr, BytesReadable_t *pend) { prmsg (2,"SocketBytesReadable(%p,%d,%p)\n", (void *) ciptr, ciptr->fd, (void *) pend); #ifdef WIN32 { int ret = ioctlsocket ((SOCKET) ciptr->fd, FIONREAD, (u_long *) pend); if (ret == SOCKET_ERROR) errno = WSAGetLastError(); return ret; } #else return ioctl (ciptr->fd, FIONREAD, (char *) pend); #endif /* WIN32 */ } #if XTRANS_SEND_FDS static void appendFd(struct _XtransConnFd **prev, int fd, int do_close) { struct _XtransConnFd *cf, *new; new = malloc (sizeof (struct _XtransConnFd)); if (!new) { /* XXX mark connection as broken */ close(fd); return; } new->next = 0; new->fd = fd; new->do_close = do_close; /* search to end of list */ for (; (cf = *prev); prev = &(cf->next)); *prev = new; } static int removeFd(struct _XtransConnFd **prev) { struct _XtransConnFd *cf; int fd; if ((cf = *prev)) { *prev = cf->next; fd = cf->fd; free(cf); } else fd = -1; return fd; } static void discardFd(struct _XtransConnFd **prev, struct _XtransConnFd *upto, int do_close) { struct _XtransConnFd *cf, *next; for (cf = *prev; cf != upto; cf = next) { next = cf->next; if (do_close || cf->do_close) close(cf->fd); free(cf); } *prev = upto; } static void cleanupFds(XtransConnInfo ciptr) { /* Clean up the send list but don't close the fds */ discardFd(&ciptr->send_fds, NULL, 0); /* Clean up the recv list and *do* close the fds */ discardFd(&ciptr->recv_fds, NULL, 1); } static int nFd(struct _XtransConnFd **prev) { struct _XtransConnFd *cf; int n = 0; for (cf = *prev; cf; cf = cf->next) n++; return n; } static int TRANS(SocketRecvFd) (XtransConnInfo ciptr) { prmsg (2, "SocketRecvFd(%d)\n", ciptr->fd); return removeFd(&ciptr->recv_fds); } static int TRANS(SocketSendFd) (XtransConnInfo ciptr, int fd, int do_close) { appendFd(&ciptr->send_fds, fd, do_close); return 0; } static int TRANS(SocketRecvFdInvalid)(XtransConnInfo ciptr) { errno = EINVAL; return -1; } static int TRANS(SocketSendFdInvalid)(XtransConnInfo ciptr, int fd, int do_close) { errno = EINVAL; return -1; } #define MAX_FDS 128 union fd_pass { struct cmsghdr cmsghdr; char buf[CMSG_SPACE(MAX_FDS * sizeof(int))]; }; #endif /* XTRANS_SEND_FDS */ static int TRANS(SocketRead) (XtransConnInfo ciptr, char *buf, int size) { prmsg (2,"SocketRead(%d,%p,%d)\n", ciptr->fd, (void *) buf, size); #if defined(WIN32) { int ret = recv ((SOCKET)ciptr->fd, buf, size, 0); #ifdef WIN32 if (ret == SOCKET_ERROR) errno = WSAGetLastError(); #endif return ret; } #else #if XTRANS_SEND_FDS { struct iovec iov = { .iov_base = buf, .iov_len = size }; union fd_pass cmsgbuf; struct msghdr msg = { .msg_name = NULL, .msg_namelen = 0, .msg_iov = &iov, .msg_iovlen = 1, .msg_control = cmsgbuf.buf, .msg_controllen = CMSG_LEN(MAX_FDS * sizeof(int)) }; size = recvmsg(ciptr->fd, &msg, 0); if (size >= 0) { struct cmsghdr *hdr; for (hdr = CMSG_FIRSTHDR(&msg); hdr; hdr = CMSG_NXTHDR(&msg, hdr)) { if (hdr->cmsg_level == SOL_SOCKET && hdr->cmsg_type == SCM_RIGHTS) { int nfd = (hdr->cmsg_len - CMSG_LEN(0)) / sizeof (int); int i; int *fd = (int *) CMSG_DATA(hdr); for (i = 0; i < nfd; i++) appendFd(&ciptr->recv_fds, fd[i], 0); } } } return size; } #else return read(ciptr->fd, buf, size); #endif /* XTRANS_SEND_FDS */ #endif /* WIN32 */ } static int TRANS(SocketReadv) (XtransConnInfo ciptr, struct iovec *buf, int size) { prmsg (2,"SocketReadv(%d,%p,%d)\n", ciptr->fd, (void *) buf, size); #if XTRANS_SEND_FDS { union fd_pass cmsgbuf; struct msghdr msg = { .msg_name = NULL, .msg_namelen = 0, .msg_iov = buf, .msg_iovlen = size, .msg_control = cmsgbuf.buf, .msg_controllen = CMSG_LEN(MAX_FDS * sizeof(int)) }; size = recvmsg(ciptr->fd, &msg, 0); if (size >= 0) { struct cmsghdr *hdr; for (hdr = CMSG_FIRSTHDR(&msg); hdr; hdr = CMSG_NXTHDR(&msg, hdr)) { if (hdr->cmsg_level == SOL_SOCKET && hdr->cmsg_type == SCM_RIGHTS) { int nfd = (hdr->cmsg_len - CMSG_LEN(0)) / sizeof (int); int i; int *fd = (int *) CMSG_DATA(hdr); for (i = 0; i < nfd; i++) appendFd(&ciptr->recv_fds, fd[i], 0); } } } return size; } #else return READV (ciptr, buf, size); #endif } static int TRANS(SocketWritev) (XtransConnInfo ciptr, struct iovec *buf, int size) { prmsg (2,"SocketWritev(%d,%p,%d)\n", ciptr->fd, (void *) buf, size); #if XTRANS_SEND_FDS if (ciptr->send_fds) { union fd_pass cmsgbuf; int nfd = nFd(&ciptr->send_fds); struct _XtransConnFd *cf = ciptr->send_fds; struct msghdr msg = { .msg_name = NULL, .msg_namelen = 0, .msg_iov = buf, .msg_iovlen = size, .msg_control = cmsgbuf.buf, .msg_controllen = CMSG_LEN(nfd * sizeof(int)) }; struct cmsghdr *hdr = CMSG_FIRSTHDR(&msg); int i; int *fds; hdr->cmsg_len = msg.msg_controllen; hdr->cmsg_level = SOL_SOCKET; hdr->cmsg_type = SCM_RIGHTS; fds = (int *) CMSG_DATA(hdr); /* Set up fds */ for (i = 0; i < nfd; i++) { fds[i] = cf->fd; cf = cf->next; } i = sendmsg(ciptr->fd, &msg, 0); if (i > 0) discardFd(&ciptr->send_fds, cf, 0); return i; } #endif return WRITEV (ciptr, buf, size); } static int TRANS(SocketWrite) (XtransConnInfo ciptr, const char *buf, int size) { prmsg (2,"SocketWrite(%d,%p,%d)\n", ciptr->fd, (const void *) buf, size); #if defined(WIN32) { int ret = send ((SOCKET)ciptr->fd, buf, size, 0); #ifdef WIN32 if (ret == SOCKET_ERROR) errno = WSAGetLastError(); #endif return ret; } #else #if XTRANS_SEND_FDS if (ciptr->send_fds) { struct iovec iov; iov.iov_base = (void *) buf; iov.iov_len = size; return TRANS(SocketWritev)(ciptr, &iov, 1); } #endif /* XTRANS_SEND_FDS */ return write (ciptr->fd, buf, size); #endif /* WIN32 */ } static int TRANS(SocketDisconnect) (XtransConnInfo ciptr) { prmsg (2,"SocketDisconnect(%p,%d)\n", (void *) ciptr, ciptr->fd); #ifdef WIN32 { int ret = shutdown (ciptr->fd, 2); if (ret == SOCKET_ERROR) errno = WSAGetLastError(); return ret; } #else return shutdown (ciptr->fd, 2); /* disallow further sends and receives */ #endif } #ifdef TCPCONN static int TRANS(SocketINETClose) (XtransConnInfo ciptr) { prmsg (2,"SocketINETClose(%p,%d)\n", (void *) ciptr, ciptr->fd); #ifdef WIN32 { int ret = close (ciptr->fd); if (ret == SOCKET_ERROR) errno = WSAGetLastError(); return ret; } #else return close (ciptr->fd); #endif } #endif /* TCPCONN */ #ifdef UNIXCONN static int TRANS(SocketUNIXClose) (XtransConnInfo ciptr) { /* * If this is the server side, then once the socket is closed, * it must be unlinked to completely close it */ struct sockaddr_un *sockname = (struct sockaddr_un *) ciptr->addr; int ret; prmsg (2,"SocketUNIXClose(%p,%d)\n", (void *) ciptr, ciptr->fd); #if XTRANS_SEND_FDS cleanupFds(ciptr); #endif ret = close(ciptr->fd); if (ciptr->flags && sockname && sockname->sun_family == AF_UNIX && sockname->sun_path[0]) { if (!(ciptr->flags & TRANS_NOUNLINK || ciptr->transptr->flags & TRANS_ABSTRACT)) unlink (sockname->sun_path); } return ret; } static int TRANS(SocketUNIXCloseForCloning) (XtransConnInfo ciptr) { /* * Don't unlink path. */ int ret; prmsg (2,"SocketUNIXCloseForCloning(%p,%d)\n", (void *) ciptr, ciptr->fd); #if XTRANS_SEND_FDS cleanupFds(ciptr); #endif ret = close(ciptr->fd); return ret; } #endif /* UNIXCONN */ #ifdef TCPCONN static const char* tcp_nolisten[] = { "inet", #ifdef IPv6 "inet6", #endif NULL }; static Xtransport TRANS(SocketTCPFuncs) = { /* Socket Interface */ "tcp", TRANS_ALIAS, tcp_nolisten, TRANS(SocketOpenCOTSServer), TRANS(SocketReopenCOTSServer), TRANS(SocketSetOption), TRANS(SocketINETCreateListener), NULL, /* ResetListener */ TRANS(SocketINETAccept), TRANS(SocketBytesReadable), TRANS(SocketRead), TRANS(SocketWrite), TRANS(SocketReadv), TRANS(SocketWritev), #if XTRANS_SEND_FDS TRANS(SocketSendFdInvalid), TRANS(SocketRecvFdInvalid), #endif TRANS(SocketDisconnect), TRANS(SocketINETClose), TRANS(SocketINETClose), }; static Xtransport TRANS(SocketINETFuncs) = { /* Socket Interface */ "inet", 0, NULL, TRANS(SocketOpenCOTSServer), TRANS(SocketReopenCOTSServer), TRANS(SocketSetOption), TRANS(SocketINETCreateListener), NULL, /* ResetListener */ TRANS(SocketINETAccept), TRANS(SocketBytesReadable), TRANS(SocketRead), TRANS(SocketWrite), TRANS(SocketReadv), TRANS(SocketWritev), #if XTRANS_SEND_FDS TRANS(SocketSendFdInvalid), TRANS(SocketRecvFdInvalid), #endif TRANS(SocketDisconnect), TRANS(SocketINETClose), TRANS(SocketINETClose), }; #ifdef IPv6 static Xtransport TRANS(SocketINET6Funcs) = { /* Socket Interface */ "inet6", 0, NULL, TRANS(SocketOpenCOTSServer), TRANS(SocketReopenCOTSServer), TRANS(SocketSetOption), TRANS(SocketINETCreateListener), NULL, /* ResetListener */ TRANS(SocketINETAccept), TRANS(SocketBytesReadable), TRANS(SocketRead), TRANS(SocketWrite), TRANS(SocketReadv), TRANS(SocketWritev), #if XTRANS_SEND_FDS TRANS(SocketSendFdInvalid), TRANS(SocketRecvFdInvalid), #endif TRANS(SocketDisconnect), TRANS(SocketINETClose), TRANS(SocketINETClose), }; #endif /* IPv6 */ #endif /* TCPCONN */ #ifdef UNIXCONN #if !defined(LOCALCONN) static Xtransport TRANS(SocketLocalFuncs) = { /* Socket Interface */ "local", #ifdef HAVE_ABSTRACT_SOCKETS TRANS_ABSTRACT, #else 0, #endif NULL, TRANS(SocketOpenCOTSServer), TRANS(SocketReopenCOTSServer), TRANS(SocketSetOption), TRANS(SocketUNIXCreateListener), TRANS(SocketUNIXResetListener), TRANS(SocketUNIXAccept), TRANS(SocketBytesReadable), TRANS(SocketRead), TRANS(SocketWrite), TRANS(SocketReadv), TRANS(SocketWritev), #if XTRANS_SEND_FDS TRANS(SocketSendFd), TRANS(SocketRecvFd), #endif TRANS(SocketDisconnect), TRANS(SocketUNIXClose), TRANS(SocketUNIXCloseForCloning), }; #endif /* !LOCALCONN */ # if !defined(LOCALCONN) static const char* unix_nolisten[] = { "local" , NULL }; # endif static Xtransport TRANS(SocketUNIXFuncs) = { /* Socket Interface */ "unix", #if !defined(LOCALCONN) && !defined(HAVE_ABSTRACT_SOCKETS) TRANS_ALIAS, #else 0, #endif #if !defined(LOCALCONN) unix_nolisten, #else NULL, #endif TRANS(SocketOpenCOTSServer), TRANS(SocketReopenCOTSServer), TRANS(SocketSetOption), TRANS(SocketUNIXCreateListener), TRANS(SocketUNIXResetListener), TRANS(SocketUNIXAccept), TRANS(SocketBytesReadable), TRANS(SocketRead), TRANS(SocketWrite), TRANS(SocketReadv), TRANS(SocketWritev), #if XTRANS_SEND_FDS TRANS(SocketSendFd), TRANS(SocketRecvFd), #endif TRANS(SocketDisconnect), TRANS(SocketUNIXClose), TRANS(SocketUNIXCloseForCloning), }; #endif /* UNIXCONN */