/* * $Header: /deneb/src0/johani/scix-0.96/src/RCS/Xlibsocket.c,v 1.3 90/03/18 14:46:51 johani Exp $ * * The contents of this file are borrowed almost entirely from: * * $XConsortium: XConnDis.c,v 11.65 89/12/09 19:10:20 rws Exp $ * * Copyright 1989 Massachusetts Institute of Technology * * 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 of M.I.T. not be used in advertising * or publicity pertaining to distribution of the software without specific, * written prior permission. M.I.T. makes no representations about the * suitability of this software for any purpose. It is provided "as is" * without express or implied warranty. * * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T. * 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. * * * This file contains operating system dependencies. */ #define NEED_EVENTS #include #include #include /* johani: was local "Xlibint.h" */ #include #include #ifdef DNETCONN #include #include #endif #ifndef X_CONNECTION_RETRIES /* number retries on ECONNREFUSED */ #define X_CONNECTION_RETRIES 5 #endif #ifdef DNETCONN static int MakeDECnetConnection(); #endif #ifdef UNIXCONN static int MakeUNIXSocketConnection(); #endif #ifdef TCPCONN static int MakeTCPConnection(); #endif #ifdef STREAMSCONN extern int _XMakeStreamsConnection(); #endif static char *copystring (src, len) char *src; int len; { char *dst = Xmalloc (len + 1); if (dst) { strncpy (dst, src, len); dst[len] = '\0'; } return dst; } /* * _XGetHostname - similar to gethostname but allows special processing. */ int _XGetHostname (buf, maxlen) char *buf; int maxlen; { int len; #ifdef hpux /* stupid makedepend [need if] */ #define NEED_UTSNAME #endif #ifdef USG #define NEED_UTSNAME #endif #ifdef NEED_UTSNAME #include /* * same host name crock as in server and xinit. */ struct utsname name; uname (&name); len = strlen (name.nodename); if (len >= maxlen) len = maxlen - 1; strncpy (buf, name.nodename, len); buf[len] = '\0'; #else buf[0] = '\0'; (void) gethostname (buf, maxlen); buf [maxlen - 1] = '\0'; len = strlen(buf); #endif /* hpux */ return len; } /* * Attempts to connect to server, given display name. Returns file descriptor * (network socket) or -1 if connection fails. Display names may be of the * following format: * * [hostname] : [:] displaynumber [.screennumber] * * The second colon indicates a DECnet style name. No hostname is interpretted * as the most efficient local connection to a server on the same machine. * This is usually: * * o shared memory * o local stream * o UNIX domain socket * o TCP to local host */ int _XConnectDisplay (display_name, fullnamep, dpynump, screenp, familyp, saddrlenp, saddrp) char *display_name; char **fullnamep; /* RETURN */ int *dpynump; /* RETURN */ int *screenp; /* RETURN */ int *familyp; /* RETURN */ int *saddrlenp; /* RETURN */ char **saddrp; /* RETURN, freed by caller */ { char *lastp, *p; /* char pointers */ char *phostname = NULL; /* start of host of display */ char *pdpynum = NULL; /* start of dpynum of display */ char *pscrnum = NULL; /* start of screen of display */ Bool dnet = False; /* if true, then DECnet format */ int idisplay; /* required display number */ int iscreen = 0; /* optional screen number */ int (*connfunc)(); /* method to create connection */ int fd = -1; /* file descriptor to return */ int len; /* length tmp variable */ p = display_name; *saddrlenp = 0; /* set so that we can clear later */ *saddrp = NULL; /* * Step 1, find the hostname. This is delimited by the required * first colon. */ for (lastp = p; *p && *p != ':'; p++) ; if (!*p) return -1; /* must have a colon */ if (p != lastp) { /* no hostname given */ phostname = copystring (lastp, p - lastp); if (!phostname) goto bad; /* no memory */ } /* * Step 2, see if this is a DECnet address by looking for the optional * second colon. */ if (p[1] == ':') { /* then DECnet format */ dnet = True; p++; } /* * see if we're allowed to have a DECnet address */ #ifndef DNETCONN if (dnet) goto bad; #endif /* * Step 3, find the display number. This field is required and is * delimited either by a nul or a period, depending on whether or not * a screen number is present. */ for (lastp = ++p; *p && isascii(*p) && isdigit(*p); p++) ; if ((p == lastp) || /* required field */ (*p != '\0' && *p != '.') || /* invalid non-digit terminator */ !(pdpynum = copystring (lastp, p - lastp))) /* no memory */ goto bad; idisplay = atoi (pdpynum); /* * Step 4, find the screen number. This field is optional. It is * present only if the display number was followed by a period (which * we've already verified is the only non-nul character). */ if (*p) { for (lastp = ++p; *p && isascii(*p) && isdigit (*p); p++) ; if (*p || /* non-digits */ !(pscrnum = copystring (lastp, p - lastp))) /* no memory */ goto bad; iscreen = atoi (lastp); } /* * At this point, we know the following information: * * phostname hostname string or NULL * idisplay display number * iscreen screen number * dnet DECnet boolean * * We can now decide which transport to use based on the ConnectionFlags * build parameter the hostname string. If phostname is NULL or equals * the string "local", then choose the best transport. If phostname * is "unix", then choose BSD UNIX domain sockets (if configured). * * First, choose default transports: DECnet else (TCP or STREAMS) */ #ifdef DNETCONN if (dnet) connfunc = MakeDECnetConnection; else #endif #ifdef TCPCONN connfunc = MakeTCPConnection; #else #ifdef STREAMSCONN connfunc = _XMakeStreamsConnection; #else connfunc = NULL; #endif #endif #ifdef UNIXCONN /* * Now that the defaults have been established, see if we have any * special names that we have to override: * * :N => if UNIXCONN then unix-domain-socket * ::N => if UNIXCONN then unix-domain-socket * unix:N => if UNIXCONN then unix-domain-socket * * Note that if UNIXCONN isn't defined, then we can use the default * transport connection function set above. */ if (!phostname) { connfunc = MakeUNIXSocketConnection; } else if (strcmp (phostname, "unix") == 0) { connfunc = MakeUNIXSocketConnection; } #endif if (!connfunc) goto bad; #ifdef UNIXCONN #define LOCALCONNECTION (!phostname || connfunc == MakeUNIXSocketConnection) #else #define LOCALCONNECTION (!phostname) #endif if (LOCALCONNECTION) { /* * Get the auth info for local hosts so that it doesn't have to be * repeated everywhere; the particular values in these fields are * not part of the protocol. */ char hostnamebuf[256]; int len = _XGetHostname (hostnamebuf, sizeof hostnamebuf); *familyp = FamilyLocal; if (len > 0) { *saddrp = Xmalloc (len + 1); if (*saddrp) { strcpy (*saddrp, hostnamebuf); *saddrlenp = len; } else { *saddrlenp = 0; } } } #undef LOCALCONNECTION /* * Make the connection, also need to get the auth address info for * non-local connections. Do retries in case server host has hit its * backlog (which, unfortunately, isn't distinguishable from there not * being a server listening at all, which is why we have to not retry * too many times). */ if ((fd = (*connfunc) (phostname, idisplay, X_CONNECTION_RETRIES, familyp, saddrlenp, saddrp)) < 0) goto bad; /* * Set the connection non-blocking since we use select() to block; also * set close-on-exec so that programs that fork() doesn't get confused. */ #ifdef FIOSNBIO { int arg = 1; ioctl (fd, FIOSNBIO, &arg); } #else (void) fcntl (fd, F_SETFL, FNDELAY); #endif /* FIOSNBIO */ (void) fcntl (fd, F_SETFD, 1); /* * Build the expanded display name: * * [host] : [:] dpy . scr \0 */ len = ((phostname ? strlen(phostname) : 0) + 1 + (dnet ? 1 : 0) + strlen(pdpynum) + 1 + (pscrnum ? strlen(pscrnum) : 1) + 1); *fullnamep = (char *) Xmalloc (len); if (!*fullnamep) goto bad; sprintf (*fullnamep, "%s%s%d.%d", (phostname ? phostname : ""), (dnet ? "::" : ":"), idisplay, iscreen); *dpynump = idisplay; *screenp = iscreen; if (phostname) Xfree (phostname); if (pdpynum) Xfree (pdpynum); if (pscrnum) Xfree (pscrnum); return fd; /* * error return; make sure everything is cleaned up. */ bad: if (fd >= 0) (void) close (fd); if (*saddrp) { Xfree (*saddrp); *saddrp = NULL; } *saddrlenp = 0; if (phostname) Xfree (phostname); if (pdpynum) Xfree (pdpynum); if (pscrnum) Xfree (pscrnum); return -1; } /***************************************************************************** * * * Make Connection Routines * * * *****************************************************************************/ #ifdef DNETCONN /* stupid makedepend */ #define NEED_BSDISH #endif #ifdef UNIXCONN #define NEED_BSDISH #endif #ifdef TCPCONN #define NEED_BSDISH #endif #ifdef NEED_BSDISH /* makedepend can't handle #if */ /* * 4.2bsd-based systems */ #include #ifndef hpux #ifdef apollo /* nest if(n)defs because makedepend is broken */ #ifndef NO_TCP_H #include #endif /* NO_TCP_H */ #else /* apollo */ #include #endif /* apollo */ #endif void bcopy(); #endif /* NEED_BSDISH */ #ifdef DNETCONN static int MakeDECnetConnection (phostname, idisplay, retries, familyp, saddrlenp, saddrp) char *phostname; int idisplay; int retries; int *familyp; /* RETURN */ int *saddrlenp; /* RETURN */ char **saddrp; /* RETURN */ { int fd; char objname[20]; extern int dnet_conn(); struct dn_naddr *dnaddrp, dnaddr; struct nodeent *np; if (!phostname) phostname = "0"; /* * build the target object name. */ sprintf (objname, "X$X%d", idisplay); /* * Attempt to open the DECnet connection, return -1 if fails; ought to * do some retries here.... */ if ((fd = dnet_conn (phostname, objname, SOCK_STREAM, 0, 0, 0, 0)) < 0) { return -1; } *familyp = FamilyDECnet; if (dnaddrp = dnet_addr (phostname)) { /* stolen from xhost */ dnaddr = *dnaddrp; } else { if ((np = getnodebyname (phostname)) == NULL) { (void) close (fd); return -1; } dnaddr.a_len = np->n_length; bcopy (np->n_addr, dnaddr.a_addr, np->n_length); } *saddrlenp = sizeof (struct dn_naddr); *saddrp = Xmalloc (*saddrlenp); if (!*saddrp) { (void) close (fd); return -1; } bcopy ((char *)&dnaddr, *saddrp, *saddrlenp); return fd; } #endif /* DNETCONN */ #ifdef UNIXCONN #include #ifndef X_UNIX_PATH #ifdef hpux #define X_UNIX_PATH "/usr/spool/sockets/X11/" #define OLD_UNIX_PATH "/tmp/.X11-unix/X" #else #define X_UNIX_PATH "/tmp/.X11-unix/X" #endif #endif /* X_UNIX_PATH */ static int MakeUNIXSocketConnection (phostname, idisplay, retries, familyp, saddrlenp, saddrp) char *phostname; int idisplay; int retries; int *familyp; /* RETURN */ int *saddrlenp; /* RETURN */ char **saddrp; /* RETURN */ { struct sockaddr_un unaddr; /* UNIX socket data block */ struct sockaddr *addr; /* generic socket pointer */ int addrlen; /* length of addr */ int fd; /* socket file descriptor */ #ifdef hpux /* this is disgusting */ struct sockaddr_un ounaddr; /* UNIX socket data block */ struct sockaddr *oaddr; /* generic socket pointer */ int oaddrlen; /* length of addr */ #endif unaddr.sun_family = AF_UNIX; sprintf (unaddr.sun_path, "%s%d", X_UNIX_PATH, idisplay); addr = (struct sockaddr *) &unaddr; addrlen = strlen(unaddr.sun_path) + sizeof(unaddr.sun_family); #ifdef hpux /* this is disgusting */ ounaddr.sun_family = AF_UNIX; sprintf (ounaddr.sun_path, "%s%d", OLD_UNIX_PATH, idisplay); oaddr = (struct sockaddr *) &ounaddr; oaddrlen = strlen(ounaddr.sun_path) + sizeof(ounaddr.sun_family); #endif /* * Open the network connection. */ do { if ((fd = socket ((int) addr->sa_family, SOCK_STREAM, 0)) < 0) { return -1; } if (connect (fd, addr, addrlen) < 0) { int olderrno = errno; (void) close (fd); #ifdef hpux /* this is disgusting */ if (olderrno == ENOENT) { fd = socket ((int) oaddr->sa_family, SOCK_STREAM, 0); if (fd >= 0) { if (connect (fd, oaddr, oaddrlen) >= 0) break; olderrno = errno; (void) close (fd); } } #endif if (olderrno != ENOENT || retries <= 0) { errno = olderrno; return -1; } sleep (1); } else { break; } } while (retries-- > 0); /* * Don't need to get auth info since we're local */ return fd; } #endif /* UNIXCONN */ #ifdef TCPCONN static int MakeTCPConnection (phostname, idisplay, retries, familyp, saddrlenp, saddrp) char *phostname; int idisplay; int retries; int *familyp; /* RETURN */ int *saddrlenp; /* RETURN */ char **saddrp; /* RETURN */ { char hostnamebuf[256]; /* tmp space */ unsigned long hostinetaddr; /* result of inet_addr of arpa addr */ struct sockaddr_in inaddr; /* IP socket */ struct sockaddr *addr; /* generic socket pointer */ int addrlen; /* length of addr */ struct hostent *hp; /* entry in hosts table */ char *cp; /* character pointer iterator */ int fd; /* file descriptor to return */ int len; /* length tmp variable */ #define INVALID_INETADDR ((unsigned long) -1) if (!phostname) { hostnamebuf[0] = '\0'; (void) _XGetHostname (hostnamebuf, sizeof hostnamebuf); phostname = hostnamebuf; } /* * if numeric host name then try to parse it as such; do the number * first because some systems return garbage instead of INVALID_INETADDR */ if (isascii(phostname[0]) && isdigit(phostname[0])) { hostinetaddr = inet_addr (phostname); } else { hostinetaddr = INVALID_INETADDR; } /* * try numeric */ if (hostinetaddr == INVALID_INETADDR) { if ((hp = gethostbyname(phostname)) == NULL) { /* No such host! */ return -1; } if (hp->h_addrtype != AF_INET) { /* is IP host? */ /* Not an Internet host! */ return -1; } /* Set up the socket data. */ inaddr.sin_family = hp->h_addrtype; #if defined(CRAY) && defined(OLDTCP) /* Only Cray UNICOS3 and UNICOS4 will define this */ { long t; bcopy ((char *)hp->h_addr, (char *)&t, sizeof(t)); inaddr.sin_addr = t; } #else bcopy ((char *)hp->h_addr, (char *)&inaddr.sin_addr, sizeof(inaddr.sin_addr)); #endif /* CRAY and OLDTCP */ } else { #if defined(CRAY) && defined(OLDTCP) /* Only Cray UNICOS3 and UNICOS4 will define this */ inaddr.sin_addr = hostinetaddr; #else inaddr.sin_addr.s_addr = hostinetaddr; #endif /* CRAY and OLDTCP */ inaddr.sin_family = AF_INET; } addr = (struct sockaddr *) &inaddr; addrlen = sizeof (struct sockaddr_in); inaddr.sin_port = X_TCP_PORT + idisplay; inaddr.sin_port = htons (inaddr.sin_port); /* may be funky macro */ /* * Open the network connection. */ do { if ((fd = socket ((int) addr->sa_family, SOCK_STREAM, 0)) < 0) { return -1; } /* * turn off TCP coalescence */ #ifdef TCP_NODELAY { int tmp = 1; setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &tmp, sizeof (int)); } #endif /* * connect to the socket; if there is no X server or if the backlog has * been reached, then ECONNREFUSED will be returned. */ if (connect (fd, addr, addrlen) < 0) { int olderrno = errno; (void) close (fd); if (olderrno != ECONNREFUSED || retries <= 0) { errno = olderrno; return -1; } sleep (1); } else { break; } } while (retries-- > 0); /* * Success! So, save the auth information */ #ifdef CRAY #ifdef OLDTCP len = sizeof(inaddr.sin_addr); #else len = SIZEOF_in_addr; #endif /* OLDTCP */ cp = (char *) &inaddr.sin_addr; #else /* else not CRAY */ len = sizeof(inaddr.sin_addr.s_addr); cp = (char *) &inaddr.sin_addr.s_addr; #endif /* CRAY */ /* * We are special casing the BSD hack localhost address * 127.0.0.1, since this address shouldn't be copied to * other machines. So, we simply omit generating the auth info * since we set it to the local machine before calling this routine! */ if (!((len == 4) && (cp[0] == 127) && (cp[1] == 0) && (cp[2] == 0) && (cp[3] == 1))) { *saddrp = Xmalloc (len); if (*saddrp) { *saddrlenp = len; bcopy (cp, *saddrp, len); *familyp = FamilyInternet; } else { *saddrlenp = 0; } } return fd; } #undef INVALID_INETADDR #endif /* TCPCONN */ /***************************************************************************** * * * Connection Utility Routines * * * *****************************************************************************/ /* * Disconnect from server. */ int _XDisconnectDisplay (server) int server; { (void) close(server); return 0; }