/* * csconndi.c -- low level connection maker for CSDPS * * (c) Copyright 1990-1994 Adobe Systems Incorporated. * All rights reserved. * * Permission to use, copy, modify, distribute, and sublicense this software * and its documentation for any purpose and without fee is hereby granted, * provided that the above copyright notices appear in all copies and that * both those copyright notices and this permission notice appear in * supporting documentation and that the name of Adobe Systems Incorporated * not be used in advertising or publicity pertaining to distribution of the * software without specific, written prior permission. No trademark license * to use the Adobe trademarks is hereby granted. If the Adobe trademark * "Display PostScript"(tm) is used to describe this software, its * functionality or for any other purpose, such use shall be limited to a * statement that this software works in conjunction with the Display * PostScript system. Proper trademark attribution to reflect Adobe's * ownership of the trademark shall be given whenever any such reference to * the Display PostScript system is made. * * ADOBE MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THE SOFTWARE FOR * ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY. * ADOBE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NON- INFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL ADOBE BE LIABLE * TO YOU OR ANY OTHER PARTY FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE, STRICT LIABILITY OR ANY OTHER ACTION ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ADOBE WILL NOT * PROVIDE ANY TRAINING OR OTHER SUPPORT FOR THE SOFTWARE. * * Adobe, PostScript, and Display PostScript are trademarks of Adobe Systems * Incorporated which may be registered in certain jurisdictions * * Portions Copyright 1989 Massachusetts Institute of Technology * * 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, 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. * * Author: Adobe Systems Incorporated and MIT X Consortium */ /* $XFree86: xc/lib/dps/csconndi.c,v 1.11tsi Exp $ */ #if defined(sun) && !defined(SVR4) #define memmove(t,f,c) bcopy(f,t,c) #endif #define NEED_EVENTS #include <stdio.h> #include <stdlib.h> #include <X11/Xos.h> /* Include this first so that Xasync.h, included from Xlibint.h, can find the definition of NOFILE */ #include <sys/param.h> #include <X11/Xlibint.h> #include "Xlibnet.h" /* New for R5, delete for R4 */ #include <arpa/inet.h> #ifndef hpux /* HP doesn't include Xauth.h :-( */ #include <X11/Xauth.h> #else #define FamilyLocal (256) #endif #include <ctype.h> #ifdef DNETCONN #include <netdnet/dn.h> #include <netdnet/dnetdb.h> #endif #include <netdb.h> #include "DPSCAPproto.h" #include "cslibint.h" #include "dpsassert.h" #if defined(hpux) || defined(AIXV3) #define SELECT_TYPE int * #else #define SELECT_TYPE fd_set * #endif #ifndef _XANYSET #define _XANYSET N_XANYSET #endif /* _XANYSET */ #ifndef X_CONNECTION_RETRIES /* number retries on ECONNREFUSED */ #define X_CONNECTION_RETRIES 5 #endif #define CONN_PARAMS char *, int , int , int *, int *, char ** #ifdef DNETCONN static int MakeDECnetConnection(CONN_PARAMS); #endif #ifdef UNIXCONN static int MakeUNIXSocketConnection(CONN_PARAMS); #endif #ifdef TCPCONN static int MakeTCPConnection(CONN_PARAMS); #endif #ifdef STREAMSCONN extern int _XMakeStreamsConnection(CONN_PARAMS); #endif /* This global controls the size of the output socket buffer. Zero means to use the system default size. */ int gNXSndBufSize = 0; static char *copystring (char *src, int len) { char *dst = Xmalloc (len + 1); if (dst) { strncpy (dst, src, len); dst[len] = '\0'; } return dst; } /* * Attempts to connect to agent, given name. Returns file descriptor * (network socket) or -1 if connection fails. Names may be of the * following format: * * [hostname] : [:] agentnumber * * 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 DPSCAPConnect( char *display_name, char **fullnamep, /* RETURN */ int *dpynump, /* 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 iagent; /* required display number */ int (*connfunc)(CONN_PARAMS); /* 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 port number. This field is required. * Zero is acceptable as a port number, meaning use the default. */ 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; iagent = atoi (pdpynum); /* * At this point, we know the following information: * * phostname hostname string or NULL * iagent agent port 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 = N_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 #ifndef ultrix /* Ultrix has a nasty bug in getservbyname(); if the name passed to it is not in the services list it seg faults! *sigh* So, we don't ever look in the services info for ultrix... */ if (iagent == 0) { /* find service default, if one's defined */ struct servent *serventInfo; if ((serventInfo = getservbyname(DPS_NX_SERV_NAME, (char *) NULL)) != NULL) { if (strcmp("tcp", serventInfo->s_proto) != 0) { DPSWarnProc(NULL, "Services database specifies a protocol other than tcp. Using default port.\n"); } else /* extract the port number */ iagent = ntohs(serventInfo->s_port); } } #endif /* ultrix */ /* * 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, iagent, 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 #if defined(O_NONBLOCK) (void) fcntl (fd, F_SETFL, O_NONBLOCK); #elif defined(FNDELAY) (void) fcntl (fd, F_SETFL, FNDELAY); #else (void) fcntl (fd, F_SETFL, O_NDELAY); #endif /* O_NONBLOCK/FNDELAY */ #endif /* FIOSNBIO */ (void) fcntl (fd, F_SETFD, 1); /* * Build the expanded display name: * * [host] : [:] agent \0 */ len = ((phostname ? strlen(phostname) : 0) + 1 + (dnet ? 1 : 0) + strlen(pdpynum) + 1); *fullnamep = (char *) Xmalloc (len); if (!*fullnamep) goto bad; sprintf (*fullnamep, "%s%s%d", (phostname ? phostname : ""), (dnet ? "::" : ":"), iagent); *dpynump = iagent; 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); 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 <sys/socket.h> #ifndef hpux #ifdef apollo /* nest if(n)defs because makedepend is broken */ #ifndef NO_TCP_H #include <netinet/tcp.h> #endif /* NO_TCP_H */ #else /* apollo */ #include <netinet/tcp.h> #endif /* apollo */ #endif #endif /* NEED_BSDISH */ #ifdef DNETCONN static int MakeDECnetConnection (phostname, iagent, retries, familyp, saddrlenp, saddrp) char *phostname; int iagent; 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, "DPS$EXECUTIVE_%d", iagent); /* * 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; memmove(dnaddr.a_addr, np->n_addr, np->n_length); } *saddrlenp = sizeof (struct dn_naddr); *saddrp = Xmalloc (*saddrlenp); if (!*saddrp) { (void) close (fd); return -1; } memmove (*saddrp, (char *)&dnaddr, *saddrlenp); return fd; } #endif /* DNETCONN */ #ifdef UNIXCONN #ifndef X_NO_SYS_UN #include <sys/un.h> #endif #ifndef CSDPS_UNIX_PATH #ifdef hpux #define CSDPS_UNIX_DIR "/usr/spool/sockets/DPSNX" #define CSDPS_UNIX_PATH "/usr/spool/sockets/DPSNX/" #else #define CSDPS_UNIX_DIR "/tmp/.DPSNX-unix" #define CSDPS_UNIX_PATH "/tmp/.DPSNX-unix/AGENT" #endif #endif static int MakeUNIXSocketConnection ( char *phostname, int iagent, 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 */ int port = (iagent == 0) ? CSDPSPORT : iagent; unaddr.sun_family = AF_UNIX; sprintf (unaddr.sun_path, "%s_%d", CSDPS_UNIX_PATH, port); addr = (struct sockaddr *) &unaddr; addrlen = strlen(unaddr.sun_path) + sizeof(unaddr.sun_family); /* * Open the network connection. */ do { if ((fd = socket ((int) addr->sa_family, SOCK_STREAM, 0)) < 0) { return -1; } if (gNXSndBufSize > 0) setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &gNXSndBufSize, sizeof(gNXSndBufSize)); if (connect (fd, addr, addrlen) < 0) { int olderrno = errno; (void) close (fd); 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 ( char *phostname, int iagent, 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) N_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; memmove ((char *)&t, (char *)hp->h_addr, sizeof(t)); inaddr.sin_addr = t; } #else memmove ((char *)&inaddr.sin_addr, (char *)hp->h_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 = (iagent == 0) ? CSDPSPORT : iagent; 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, (char *)&tmp, sizeof (int)); } #endif if (gNXSndBufSize > 0) len = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &gNXSndBufSize, sizeof(gNXSndBufSize)); /* * 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; memmove (*saddrp, cp, len); *familyp = FamilyInternet; } else { *saddrlenp = 0; } } return fd; } #undef INVALID_INETADDR #endif /* TCPCONN */ /***************************************************************************** * * * Connection Utility Routines * * * *****************************************************************************/ /* * Disconnect from server. */ int N_XDisconnectDisplay (int server) { (void) close(server); return 0; } #include <stddef.h> /* * This is an OS dependent routine which: * 1) returns as soon as the connection can be written on.... * 2) if the connection can be read, must enqueue events and handle errors, * until the connection is writable. */ void N_XWaitForWritable(Display *dpy) { unsigned long r_mask[MSKCNT]; unsigned long w_mask[MSKCNT]; int nfound; CLEARBITS(r_mask); CLEARBITS(w_mask); while (1) { BITSET(r_mask, dpy->fd); BITSET(w_mask, dpy->fd); do { nfound = select (dpy->fd + 1, (SELECT_TYPE) r_mask, (SELECT_TYPE) w_mask, (SELECT_TYPE) NULL, (struct timeval *) NULL); if (nfound < 0 && errno != EINTR) _XIOError(dpy); } while (nfound <= 0); if (_XANYSET(r_mask)) { char buf[BUFSIZE]; long pend_not_register; register long pend; register xEvent *ev; /* find out how much data can be read */ if (BytesReadable(dpy->fd, (char *) &pend_not_register) < 0) _XIOError(dpy); pend = pend_not_register; /* must read at least one xEvent; if none is pending, then we'll just block waiting for it */ if (pend < SIZEOF(xEvent)) pend = SIZEOF(xEvent); /* but we won't read more than the max buffer size */ if (pend > BUFSIZE) pend = BUFSIZE; /* round down to an integral number of XReps */ pend = (pend / SIZEOF(xEvent)) * SIZEOF(xEvent); N_XRead (dpy, buf, pend); /* no space between comma and type or else macro will die */ STARTITERATE (ev,xEvent, buf, (pend > 0), (pend -= SIZEOF(xEvent))) { if (ev->u.u.type == X_Error) _XError (dpy, (xError *) ev); else /* it's an event packet; die */ DPSFatalProc((DPSContext)0, "N_XWaitForWritable read bogus X event"); } ENDITERATE } if (_XANYSET(w_mask)) return; } } void N_XWaitForReadable(Display *dpy) { unsigned long r_mask[MSKCNT]; int result; CLEARBITS(r_mask); do { BITSET(r_mask, dpy->fd); result = select(dpy->fd + 1, (SELECT_TYPE) r_mask, (SELECT_TYPE) NULL, (SELECT_TYPE) NULL, (struct timeval *) NULL); if (result == -1 && errno != EINTR) _XIOError(dpy); } while (result <= 0); } #ifdef XXX static int padlength[4] = {0, 3, 2, 1}; /* make sure auth is multiple of 4 */ _XSendClientPrefix ( Display *dpy, xConnClientPrefix *client, /* contains count for auth_* */ char *auth_proto, /* NOT null-terminated */ char char *auth_string) /* NOT null-terminated */ { int auth_length = client->nbytesAuthProto; int auth_strlen = client->nbytesAuthString; char padbuf[3]; /* for padding to 4x bytes */ int pad; struct iovec iovarray[5], *iov = iovarray; int niov = 0; #define add_to_iov(b,l) \ { iov->iov_base = (b); iov->iov_len = (l); iov++, niov++; } add_to_iov ((caddr_t) client, SIZEOF(xConnClientPrefix)); /* * write authorization protocol name and data */ if (auth_length > 0) { add_to_iov (auth_proto, auth_length); pad = padlength [auth_length & 3]; if (pad) add_to_iov (padbuf, pad); } if (auth_strlen > 0) { add_to_iov (auth_string, auth_strlen); pad = padlength [auth_strlen & 3]; if (pad) add_to_iov (padbuf, pad); } #undef add_to_iov (void) WritevToServer (dpy->fd, iovarray, niov); return; } #endif /* XXX */