/* ****************************************************** * * * A spy program to reveal X11 traffic * * * * James Peterson, 1988 * * Copyright (C) 1988 MCC * * 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 MCC not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. MCC makes no * representations about the suitability of this software for any purpose. It * is provided "as is" without express or implied warranty. * * MCC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL MCC 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. * * * * * Copyright 2002 Sun Microsystems, Inc. All rights reserved. * * 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, and/or sell copies of the Software, and to permit persons * to whom the Software is furnished to do so, provided that the above * copyright notice(s) and this permission notice appear in all copies of * the Software and that both the above copyright notice(s) and this * permission notice appear in supporting documentation. * * 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 * OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR * HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR 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. * * Except as contained in this notice, the name of a copyright holder * shall not be used in advertising or otherwise to promote the sale, use * or other dealings in this Software without prior written authorization * of the copyright holder. * ***************************************************** */ #include "scope.h" #include #include #include #ifdef SYSV #define bzero(s,l) memset(s, 0, l) #define bcopy(s,d,l) memmove(d,s,l) #endif /* ********************************************** */ /* */ /* ********************************************** */ #define DefaultPort 6000 static char ServerHostName[MAXHOSTNAMELEN]; long ServerBasePort = DefaultPort; static long ServerInPort = 1; static long ServerOutPort = 0; static long ServerDisplay = 0; #ifdef USE_XTRANS #undef DNETCONN #undef DNETSVR4 #endif #ifdef DNETCONN #include #include int decnet_in = 0; int decnet_out = 0; int decnet_server = 0; #endif #ifdef DNETSVR4 #include extern struct hostent *(*dnet_gethostbyname)(); extern int (*dnet_gethostname)(); short initialize_libdni(); int decnet_in = 0; int decnet_out = 0; int decnet_server = 0; #endif static FD ConnectToClient(FD ConnectionSocket); static FD ConnectToServer(int report); static void SetUpStdin(void); /* ********************************************** */ /* */ /* */ /* ********************************************** */ static short GetServerport () { short port; enterprocedure("GetServerport"); #if defined(DNETCONN) || defined(DNETSVR4) if (decnet_server) { port = ServerDisplay + ServerOutPort; return(port); } #endif port = ServerBasePort + ServerOutPort + ServerDisplay; debug(4,(stderr, "Server service is on port %d\n", port)); return(port); } static short GetScopePort () { short port; enterprocedure("GetScopePort"); #if defined(DNETCONN) || defined(DNETSVR4) if (decnet_in) { port = ServerInPort + ServerDisplay; return(port); } #endif port = ServerBasePort + ServerInPort + ServerDisplay; debug(4,(stderr, "scope service is on port %d\n", port)); return(port); } /* ********************************************** */ /* */ /* ********************************************** */ static void Usage() { fprintf(stderr, "Usage: xscope\n"); fprintf(stderr, " [-h]\n"); fprintf(stderr, " [-i]\n"); fprintf(stderr, " [-o]\n"); fprintf(stderr, " [-d]\n"); fprintf(stderr, " [-v] -- verbose output\n"); #ifdef RAW_MODE fprintf(stderr, " [-r] -- raw output\n"); #endif fprintf(stderr, " [-q] -- quiet output\n"); fprintf(stderr, " [-D]\n"); exit(1); } static void ScanArgs(argc, argv) int argc; char **argv; { #if defined(DNETCONN) || defined(DNETSVR4) char *ss; #endif Verbose = 1 /* default verbose-ness level */; #ifdef RAW_MODE Raw = 0 ; #endif /* Scan argument list */ while (--argc > 0) { ++argv; if (**argv == '-') switch (*++*argv) { /* debug levels: 2 - trace each procedure entry 4 - I/O, connections 8 - Scope internals 16 - Message protocol 32 - 64 - malloc 128 - 256 - really low level */ case 'D': debuglevel = atoi(++*argv); if (debuglevel == 0) debuglevel = 255; debuglevel |= 1; Verbose = 7; debug(1,(stderr, "debuglevel = %d\n", debuglevel)); break; case 'q': /* quiet mode */ Verbose = 0; debug(1,(stderr, "Verbose = %d\n", Verbose)); break; case 'v': /* verbose mode */ Verbose = atoi(++*argv); debug(1,(stderr, "Verbose = %d\n", Verbose)); break; #ifdef RAW_MODE case 'r': /* raw mode */ Raw = 1 ; debug(1,(stderr, "Raw = %d\n", Raw)); break; #endif case 'o': ServerOutPort = atoi(++*argv); if (ServerOutPort <= 0) ServerOutPort = 0; debug(1,(stderr, "ServerOutPort = %d\n", ServerOutPort)); break; case 'd': ServerDisplay = atoi(++*argv); if (ServerDisplay <= 0) ServerDisplay = 0; debug(1,(stderr, "ServerDisplay=%d\n", ServerDisplay)); break; case 'i': #if defined(DNETCONN) || defined(DNETSVR4) if (ss = (char *)strchr(*argv,':')) { decnet_in = 1; *ss = NULL; } #endif ServerInPort = atoi(++*argv); if (ServerInPort <= 0) ServerInPort = 0; debug(1,(stderr, "ServerInPort = %d\n", ServerInPort)); break; case 'h': #if defined(DNETCONN) || defined(DNETSVR4) if (ss = (char *)strchr(*argv,':')) { decnet_server = 1; *ss = NULL; strcpy(ServerHostName,++*argv); break; } #endif if (++*argv != NULL && **argv != '\0' && (strlen(*argv) < sizeof(ServerHostName))) strcpy(ServerHostName, *argv); debug(1,(stderr, "ServerHostName=%s\n", ServerHostName)); break; default: fprintf(stderr, "Unknown option %c\n", **argv); Usage(); break; } else { /* file argument to scope -- error */ Usage(); } } /* check for different port numbers or different machines */ if (ServerInPort == ServerOutPort) if (ServerHostName[0] == '\0') { fprintf(stderr, "Can't have xscope on same port as server (%d)\n", ServerInPort); Usage(); } } /* ********************************************** */ /* */ /* ********************************************** */ main(argc, argv) int argc; char **argv; { ScanArgs(argc, argv); InitializeFD(); InitializeX11(); SetUpStdin(); #if defined(DNETCONN) || defined(DNETSVR4) if (decnet_in) SetUpDECnetConnection(GetScopePort()); else SetUpConnectionSocket(GetScopePort()); #else SetUpConnectionSocket(GetScopePort()); SetSignalHandling(); #endif return MainLoop(); } void TimerExpired() { debug(16,(stderr, "Timer tick\n")); } /* ********************************************** */ /* */ /* ********************************************** */ /* here is where we would add code to allow control from the keyboard. We would want to read a command and interpret it. Possibilties: (a) verbose level setting (b) reset time (c) save X requests to a file. (d) replay X requests from a file. (e) allow fake events, errors to be generated. */ static void ReadStdin(fd) FD fd; { char buf[2048]; long n; enterprocedure("ReadStdin"); n = read(fd, buf, 2048); debug(4,(stderr, "read %d bytes from stdin\n", n)); } static void SetUpStdin() { enterprocedure("SetUpStdin"); UsingFD(fileno(stdin), ReadStdin, NULL); } /* ************************************************************ */ /* */ /* */ /* ************************************************************ */ /* xscope is really meant to look at one client at a time. However, it can easily handle multiple clients and servers. To do so, we need to have a pair of FDs: one for the client and one for the server for that client. If either goes away, so does the other. We need to be able to identify the other FD of a pair, so that if we get input from one, we can write it to the other. */ struct fdinfo { Boolean Server; long ClientNumber; FD pair; }; static long ClientNumber = 0; static struct fdinfo FDinfo[StaticMaxFD]; static void SetUpPair(client, server) FD client; FD server; { if (client >= 0) { ClientNumber += 1; FDinfo[client].Server = false; FDinfo[client].pair = server; FDinfo[client].ClientNumber = ClientNumber; if (server >= 0) { FDinfo[server].Server = true; FDinfo[server].pair = client; FDinfo[server].ClientNumber = FDinfo[client].ClientNumber; } } else if (server >= 0) { close(server); NotUsingFD(server); } } static void CloseConnection(fd) FD fd; { debug(4,(stderr, "close %d and %d\n", fd, FDPair(fd))); StopClientConnection(ServerHalf(fd)); StopServerConnection(ClientHalf(fd)); #ifdef USE_XTRANS _X11TransClose(GetXTransConnInfo(fd)); _X11TransClose(GetXTransConnInfo(FDPair(fd))); #else close(fd); close(FDPair(fd)); #endif NotUsingFD(fd); NotUsingFD(FDPair(fd)); } /* ************************************************************ */ FD FDPair(fd) FD fd; { return(FDinfo[fd].pair); } FD ClientHalf(fd) FD fd; { if (FDinfo[fd].Server) return(FDinfo[fd].pair); return(fd); } FD ServerHalf(fd) FD fd; { if (FDinfo[fd].Server) return(fd); return(FDinfo[fd].pair); } char *ClientName (fd) FD fd; { static char name[12]; if (ClientNumber <= 1) return(""); sprintf(name, " %d", FDinfo[fd].ClientNumber); return(name); } /* ********************************************** */ /* */ /* ********************************************** */ /* when we get data from a client, we read it in, copy it to the server for this client, then dump it to the client. Note, we don't have to have a server, if there isn't one. */ static void DataFromClient(fd) FD fd; { unsigned char buf[2048]; long n; FD ServerFD; enterprocedure("DataFromClient"); n = read(fd, (char *)buf, 2048); debug(4,(stderr, "read %d bytes from Client%s\n", n, ClientName(fd))); if (n < 0) { PrintTime(); perror("Client --> read error:"); CloseConnection(fd); return; } if (n == 0) { PrintTime(); fprintf(stdout, "Client%s --> EOF\n", ClientName(fd)); CloseConnection(fd); return; } ServerFD = FDPair(fd); if (ServerFD < 0) { ServerFD = ConnectToServer(false); SetUpPair(fd, ServerFD); } /* write bytes from client to server, allow for server to fail */ if (ServerFD >= 0) { long BytesToWrite = n; unsigned char *p = buf; while (BytesToWrite > 0) { int n1 = write (ServerFD, (char *)p, (int)BytesToWrite); debug(4,(stderr, "write %d bytes to Server%s\n", n1, ClientName(fd))); if (n1 > 0) { BytesToWrite -= n1; p += n1; } /* B U G : 4156754 Write may fail with an error code of EAGAIN if BytesToWrite is less than PIPE_BUF, but bigger than available free space. This error says, wait and try again till PIPE is flushed and has more free space. */ else if (errno == EAGAIN) { /* Wait for some time and try again */ sleep (1); } else { perror("Error on write to Server"); CloseConnection(fd); BytesToWrite = 0; } } } /* also report the bytes to standard out */ ReportFromClient(fd, buf, n); } /* ********************************************** */ /* */ /* ********************************************** */ /* similar situation for the server, but note that if there is no client, we close the connection down -- don't need a server with no client. */ static void DataFromServer(fd) FD fd; { unsigned char buf[2048]; long n; FD ClientFD; enterprocedure("DataFromServer"); n = read(fd, (char *)buf, 2048); debug(4,(stderr, "read %d bytes from Server%s\n", n, ClientName(fd))); if (n < 0) { PrintTime(); perror("read error <- Server"); CloseConnection(fd); return; } if (n == 0) { PrintTime(); fprintf(stdout, "EOF <-- Server%s\n", ClientName(fd)); CloseConnection(fd); return; } ClientFD = FDPair(fd); if (ClientFD < 0) { CloseConnection(fd); return; } /* write bytes from server to client, allow for client to fail */ { long BytesToWrite = n; unsigned char *p = buf; while (BytesToWrite > 0) { int n1 = write (ClientFD, (char *)p, (int)BytesToWrite); debug(4,(stderr, "write %d bytes to Client%s\n", n1, ClientName(fd))); if (n1 > 0) { BytesToWrite -= n1; p += n1; } /* B U G : 4156754 Write may fail with an error code of EAGAIN if BytesToWrite is less than PIPE_BUF, but bigger than available free space. This error says, wait and try again till PIPE is flushed and has more free space. */ else if (errno == EAGAIN) { /* Wait for some time and try again */ sleep (1); } else { perror("Error on write to Client"); CloseConnection(fd); BytesToWrite = 0; } } } /* also report the bytes to standard out */ ReportFromServer(fd, buf, n); } /* ************************************************************ */ /* */ /* Create New Connection to a client program and to Server */ /* */ /* ************************************************************ */ #include /* needed by sys/socket.h and netinet/in.h */ #include /* for struct iovec, used by socket.h */ #include /* for AF_INET, SOCK_STREAM, ... */ #include /* for FIONCLEX, FIONBIO, ... */ #include /* struct sockaddr_in */ #include /* struct servent * and struct hostent * */ #include /* for EINTR, EADDRINUSE, ... */ extern int errno; static int ON = 1 /* used in ioctl */ ; void NewConnection(fd) FD fd; { FD ServerFD = -1; FD ClientFD = -1; #ifdef DNETCONN if (decnet_in) ClientFD = ConnectToDECnetClient(fd); else ClientFD = ConnectToClient(fd); if (decnet_server) ServerFD = ConnectToDECnetServer(true); else ServerFD = ConnectToServer(true); #endif #ifdef DNETSVR4 ClientFD = ConnectToClient(fd); if (decnet_server) { if (!initialize_libdni()) { fprintf(stderr,"Unable to open libdni.so\n"); exit(0); } ServerFD = ConnectToDECnetSVR4Server(true); } else ServerFD = ConnectToServer(true); #endif #if !(defined(DNETCONN)) && !(defined(DNETSVR4)) ClientFD = ConnectToClient(fd); ServerFD = ConnectToServer(true); #endif SetUpPair(ClientFD, ServerFD); } /* ************************************************************ */ static FD ConnectToClient(ConnectionSocket) FD ConnectionSocket; { FD ClientFD; XtransConnInfo trans_conn = NULL; #ifdef USE_XTRANS XtransConnInfo listen_conn; int status; #else struct sockaddr_in from; int len = sizeof (from); #endif enterprocedure("ConnectToClient"); #ifdef USE_XTRANS listen_conn = GetXTransConnInfo(ConnectionSocket); if ((trans_conn = _X11TransAccept (listen_conn, &status)) == NULL) { debug(4,(stderr, "Failed to accept connection\n")); return -1; } _X11TransSetOption(trans_conn, TRANS_NONBLOCKING, 1); ClientFD = _X11TransGetConnectionNumber(trans_conn); #else ClientFD = accept(ConnectionSocket, (struct sockaddr *)&from, &len); #endif debug(4,(stderr, "Connect To Client: FD %d\n", ClientFD)); if (ClientFD < 0 && errno == EWOULDBLOCK) { debug(4,(stderr, "Almost blocked accepting FD %d\n", ClientFD)); panic("Can't connect to Client"); } if (ClientFD < 0) { debug(4,(stderr, "NewConnection: error %d\n", errno)); panic("Can't connect to Client"); } UsingFD(ClientFD, DataFromClient, trans_conn); #ifndef USE_XTRANS ioctl(ClientFD, FIOCLEX, 0); ioctl(ClientFD, FIONBIO, &ON); #endif StartClientConnection(ClientFD); return(ClientFD); } /* ************************************************************ */ /* */ /* */ /* ************************************************************ */ static FD ConnectToServer(report) Boolean report; { FD ServerFD; XtransConnInfo trans_conn = NULL; /* transport connection object */ #ifdef USE_XTRANS char address[256]; int connect_stat; extern long ServerBasePort; #else struct sockaddr_in sin; struct hostent *hp; #endif short port; enterprocedure("ConnectToServer"); /* determine the host machine for this process */ if (ServerHostName[0] == '\0') (void) gethostname(ServerHostName, sizeof (ServerHostName)); debug(4,(stderr, "try to connect on %s\n", ServerHostName)); port = GetServerport (); if (port == ScopePort && strcmp(ServerHostName, ScopeHost) == 0) { char error_message[100]; sprintf(error_message, "Trying to attach to myself: %s,%d\n", ServerHostName, port); panic(error_message); } #ifdef USE_XTRANS snprintf (address, sizeof(address), "%s:%d", ServerHostName, port - ServerBasePort); if ( (trans_conn = _X11TransOpenCOTSClient(address)) == NULL ) { debug(1,(stderr, "OpenCOTSClient failed\n")); panic("Can't open connection to Server"); } if ((connect_stat = _X11TransConnect(trans_conn,address)) < 0 ) { _X11TransClose(trans_conn); trans_conn = NULL; debug(1,(stderr, "TransConnect failed\n")); panic("Can't open connection to Server"); } ServerFD = _X11TransGetConnectionNumber(trans_conn); #else /* establish a socket to the name server for this host */ bzero((char *)&sin, sizeof(sin)); ServerFD = socket(AF_INET, SOCK_STREAM, 0); if (ServerFD < 0) { perror("socket() to Server failed"); debug(1,(stderr, "socket failed\n")); panic("Can't open connection to Server"); } (void) setsockopt(ServerFD, SOL_SOCKET, SO_REUSEADDR, (char *) NULL, 0); (void) setsockopt(ServerFD, SOL_SOCKET, SO_USELOOPBACK,(char *) NULL, 0); #ifdef SO_DONTLINGER (void) setsockopt(ServerFD, SOL_SOCKET, SO_DONTLINGER, (char *) NULL, 0); #endif hp = gethostbyname(ServerHostName); if (hp == 0) { perror("gethostbyname failed"); debug(1,(stderr, "gethostbyname failed for %s\n", ServerHostName)); panic("Can't open connection to Server"); } sin.sin_family = AF_INET; bcopy((char *)hp->h_addr, (char *)&sin.sin_addr, hp->h_length); sin.sin_port = htons (port); /* ******************************************************** */ /* try to connect to Server */ if (connect(ServerFD, (struct sockaddr *)&sin, sizeof(sin)) < 0) { debug(4,(stderr, "connect returns errno of %d\n", errno)); if (errno != 0) if (report) perror("connect"); switch (errno) { case ECONNREFUSED: /* experience says this is because there is no Server to connect to */ close(ServerFD); debug(1,(stderr, "No Server\n")); if (report) warn("Can't open connection to Server"); return(-1); default: close(ServerFD); panic("Can't open connection to Server"); } } #endif debug(4,(stderr, "Connect To Server: FD %d\n", ServerFD)); if (ServerFD >= 0) { UsingFD(ServerFD, DataFromServer, trans_conn); StartServerConnection(ServerFD); } return(ServerFD); } #ifdef DNETSVR4 FD ConnectToDECnetSVR4Server(report) Boolean report; { FD ServerFD; struct sockaddr_dn sdn; struct hostent *hp; enterprocedure("ConnectToServer"); /* establish a socket to the name server for this host */ ServerFD = socket(AF_DECnet, SOCK_STREAM, 0); if (ServerFD < 0) { perror("socket() to Server failed"); debug(1,(stderr, "socket failed\n")); panic("Can't open connection to Server"); } (void) setsockopt(ServerFD, SOL_SOCKET, SO_REUSEADDR, (char *) NULL, 0); (void) setsockopt(ServerFD, SOL_SOCKET, SO_USELOOPBACK,(char *) NULL, 0); /* determine the host machine for this process */ initialize_libdni(); if (ServerHostName[0] == '\0') (dnet_gethostname)(ServerHostName); debug(4,(stderr, "try to connect on %s\n", ServerHostName)); hp = (struct hostent *)(dnet_gethostbyname)(ServerHostName); if (hp == 0) { perror("gethostbyname failed"); debug(1,(stderr, "gethostbyname failed for %s\n", ServerHostName)); panic("Can't open connection to Server"); } sdn.sdn_family = AF_DECnet; sdn.sdn_format = DNADDR_FMT1; sdn.sdn_port = 0; sprintf (sdn.sdn_name, "X$X%d", GetServerport() ); sdn.sdn_namelen = strlen(sdn.sdn_name); sdn.sdn_addr = *(u_short *)hp->h_addr_list[0]; /* ******************************************************** */ /* try to connect to Server */ if (connect(ServerFD, (struct sockaddr *)&sdn, sizeof(sdn)) < 0) { debug(4,(stderr, "connect returns errno of %d\n", errno)); if (errno != 0) if (report) perror("connect"); switch (errno) { case ECONNREFUSED: /* experience says this is because there is no Server to connect to */ close(ServerFD); debug(1,(stderr, "No Server\n")); if (report) warn("Can't open connection to Server"); return(-1); default: close(ServerFD); panic("Can't open connection to Server"); } } debug(4,(stderr, "Connect To Server: FD %d\n", ServerFD)); if (ServerFD >= 0) { UsingFD(ServerFD, DataFromServer, NULL); StartServerConnection(ServerFD); } return(ServerFD); } #endif /* ********************************************** */ /* */ /* ********************************************** */ #ifdef DNETCONN FD ConnectToDECnetClient(fd) FD fd; { struct ses_io_type sesopts; static SessionData sd= {0, {0, ""}}; if (ioctl(fd, SES_ACCEPT, &sd) < 0) { fprintf(stderr,"xscope: dni: SES_ACCEPT failed\n"); exit(-1); } UsingFD(fd, DataFromClient, NULL); StartClientConnection(fd); /* unlike sockets, dni consumes the fd on which it was listening */ /* in order to accept new logical link requests using the same name */ /* we must re-open the logical link device and re-supply the */ /* appropriate access control information */ SetUpDECnetConnection(GetScopePort()); return(fd); } FD ConnectToDECnetServer(report) Boolean report; { FD fd; OpenBlock opblk; struct ses_io_type sesopts; struct nodeent *np; if ((fd = open("/dev/dni", O_RDWR)) < 0) { fprintf(stderr,"xscope: dni: open failed\n"); exit(-1); } if (ioctl(fd, SES_GET_LINK, 0)) { fprintf(stderr,"xscope: dni: can't get link\n"); exit(-1); } /* set nonblocking here since dni can't handle fcntls */ sesopts.io_flags = SES_IO_NBIO; sesopts.io_io_signal = sesopts.io_int_signal = 0; if (ioctl(fd, SES_IO_TYPE, &sesopts) < 0) { fprintf(stderr,"xscope: dni: ioctl failed\n"); exit(-1); } strncpy(opblk.op_node_name,ServerHostName , 6); /* dni server name */ opblk.op_node_name[6] = '\0'; sprintf(opblk.op_task_name, "X$X%d", GetServerport()); opblk.op_userid[0] = '\0'; /* No one checks our id */ opblk.op_object_nbr = 0; /* Any fields not used */ opblk.op_account[0] = '\0'; /* should be set to zero */ opblk.op_password[0] = '\0'; opblk.op_opt_data.im_length = 0; if (ioctl(fd, SES_LINK_ACCESS, &opblk) == -1) { fprintf(stderr,"xscope: dni: cannot connect to server\n"); exit(-1); } UsingFD(fd, DataFromServer, NULL); StartServerConnection(fd); return(fd); } #endif