URL
https://opencores.org/ocsvn/or1k_old/or1k_old/trunk
Subversion Repositories or1k_old
[/] [or1k_old/] [trunk/] [insight/] [tcl/] [unix/] [tclUnixChan.c] - Rev 578
Go to most recent revision | Compare with Previous | Blame | View Log
/* * tclUnixChan.c * * Common channel driver for Unix channels based on files, command * pipes and TCP sockets. * * Copyright (c) 1995-1997 Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclUnixChan.c,v 1.1.1.1 2002-01-16 10:25:37 markom Exp $ */ #include "tclInt.h" /* Internal definitions for Tcl. */ #include "tclPort.h" /* Portability features for Tcl. */ /* * sys/ioctl.h has already been included by tclPort.h. Including termios.h * or termio.h causes a bunch of warning messages because some duplicate * (but not contradictory) #defines exist in termios.h and/or termio.h */ #undef NL0 #undef NL1 #undef CR0 #undef CR1 #undef CR2 #undef CR3 #undef TAB0 #undef TAB1 #undef TAB2 #undef XTABS #undef BS0 #undef BS1 #undef FF0 #undef FF1 #undef ECHO #undef NOFLSH #undef TOSTOP #undef FLUSHO #undef PENDIN #ifdef USE_TERMIOS # include <termios.h> #else /* !USE_TERMIOS */ #ifdef USE_TERMIO # include <termio.h> #else /* !USE_TERMIO */ #ifdef USE_SGTTY # include <sgtty.h> #endif /* USE_SGTTY */ #endif /* !USE_TERMIO */ #endif /* !USE_TERMIOS */ /* * The following structure is used to set or get the serial port * attributes in a platform-independant manner. */ typedef struct TtyAttrs { int baud; int parity; int data; int stop; } TtyAttrs; /* * This structure describes per-instance state of a file based channel. */ typedef struct FileState { Tcl_Channel channel; /* Channel associated with this file. */ int fd; /* File handle. */ int validMask; /* OR'ed combination of TCL_READABLE, * TCL_WRITABLE, or TCL_EXCEPTION: indicates * which operations are valid on the file. */ struct FileState *nextPtr; /* Pointer to next file in list of all * file channels. */ } FileState; /* * List of all file channels currently open. */ static FileState *firstFilePtr = NULL; /* * This structure describes per-instance state of a tcp based channel. */ typedef struct TcpState { Tcl_Channel channel; /* Channel associated with this file. */ int fd; /* The socket itself. */ int flags; /* ORed combination of the bitfields * defined below. */ Tcl_TcpAcceptProc *acceptProc; /* Proc to call on accept. */ ClientData acceptProcData; /* The data for the accept proc. */ } TcpState; /* * These bits may be ORed together into the "flags" field of a TcpState * structure. */ #define TCP_ASYNC_SOCKET (1<<0) /* Asynchronous socket. */ #define TCP_ASYNC_CONNECT (1<<1) /* Async connect in progress. */ /* * The following defines the maximum length of the listen queue. This is * the number of outstanding yet-to-be-serviced requests for a connection * on a server socket, more than this number of outstanding requests and * the connection request will fail. */ #ifndef SOMAXCONN #define SOMAXCONN 100 #endif #if (SOMAXCONN < 100) #undef SOMAXCONN #define SOMAXCONN 100 #endif /* * The following defines how much buffer space the kernel should maintain * for a socket. */ #define SOCKET_BUFSIZE 4096 /* * Static routines for this file: */ static TcpState * CreateSocket _ANSI_ARGS_((Tcl_Interp *interp, int port, char *host, int server, char *myaddr, int myport, int async)); static int CreateSocketAddress _ANSI_ARGS_( (struct sockaddr_in *sockaddrPtr, char *host, int port)); static int FileBlockModeProc _ANSI_ARGS_(( ClientData instanceData, int mode)); static int FileCloseProc _ANSI_ARGS_((ClientData instanceData, Tcl_Interp *interp)); static int FileGetHandleProc _ANSI_ARGS_((ClientData instanceData, int direction, ClientData *handlePtr)); static int FileInputProc _ANSI_ARGS_((ClientData instanceData, char *buf, int toRead, int *errorCode)); static int FileOutputProc _ANSI_ARGS_(( ClientData instanceData, char *buf, int toWrite, int *errorCode)); static int FileSeekProc _ANSI_ARGS_((ClientData instanceData, long offset, int mode, int *errorCode)); static void FileWatchProc _ANSI_ARGS_((ClientData instanceData, int mask)); static void TcpAccept _ANSI_ARGS_((ClientData data, int mask)); static int TcpBlockModeProc _ANSI_ARGS_((ClientData data, int mode)); static int TcpCloseProc _ANSI_ARGS_((ClientData instanceData, Tcl_Interp *interp)); static int TcpGetHandleProc _ANSI_ARGS_((ClientData instanceData, int direction, ClientData *handlePtr)); static int TcpGetOptionProc _ANSI_ARGS_((ClientData instanceData, Tcl_Interp *interp, char *optionName, Tcl_DString *dsPtr)); static int TcpInputProc _ANSI_ARGS_((ClientData instanceData, char *buf, int toRead, int *errorCode)); static int TcpOutputProc _ANSI_ARGS_((ClientData instanceData, char *buf, int toWrite, int *errorCode)); static void TcpWatchProc _ANSI_ARGS_((ClientData instanceData, int mask)); static int TtyParseMode _ANSI_ARGS_((Tcl_Interp *interp, CONST char *mode, int *speedPtr, int *parityPtr, int *dataPtr, int *stopPtr)); static void TtyGetAttributes _ANSI_ARGS_((int fd, TtyAttrs *ttyPtr)); static int TtyGetOptionProc _ANSI_ARGS_((ClientData instanceData, Tcl_Interp *interp, char *optionName, Tcl_DString *dsPtr)); static void TtyInit _ANSI_ARGS_((int fd)); static void TtySetAttributes _ANSI_ARGS_((int fd, TtyAttrs *ttyPtr)); static int TtySetOptionProc _ANSI_ARGS_((ClientData instanceData, Tcl_Interp *interp, char *optionName, char *value)); static int WaitForConnect _ANSI_ARGS_((TcpState *statePtr, int *errorCodePtr)); /* * This structure describes the channel type structure for file based IO: */ static Tcl_ChannelType fileChannelType = { "file", /* Type name. */ FileBlockModeProc, /* Set blocking/nonblocking mode.*/ FileCloseProc, /* Close proc. */ FileInputProc, /* Input proc. */ FileOutputProc, /* Output proc. */ FileSeekProc, /* Seek proc. */ NULL, /* Set option proc. */ NULL, /* Get option proc. */ FileWatchProc, /* Initialize notifier. */ FileGetHandleProc, /* Get OS handles out of channel. */ }; /* * This structure describes the channel type structure for serial IO. * Note that this type is a subclass of the "file" type. */ static Tcl_ChannelType ttyChannelType = { "tty", /* Type name. */ FileBlockModeProc, /* Set blocking/nonblocking mode.*/ FileCloseProc, /* Close proc. */ FileInputProc, /* Input proc. */ FileOutputProc, /* Output proc. */ NULL, /* Seek proc. */ TtySetOptionProc, /* Set option proc. */ TtyGetOptionProc, /* Get option proc. */ FileWatchProc, /* Initialize notifier. */ FileGetHandleProc, /* Get OS handles out of channel. */ }; /* * This structure describes the channel type structure for TCP socket * based IO: */ static Tcl_ChannelType tcpChannelType = { "tcp", /* Type name. */ TcpBlockModeProc, /* Set blocking/nonblocking mode.*/ TcpCloseProc, /* Close proc. */ TcpInputProc, /* Input proc. */ TcpOutputProc, /* Output proc. */ NULL, /* Seek proc. */ NULL, /* Set option proc. */ TcpGetOptionProc, /* Get option proc. */ TcpWatchProc, /* Initialize notifier. */ TcpGetHandleProc, /* Get OS handles out of channel. */ }; /* *---------------------------------------------------------------------- * * FileBlockModeProc -- * * Helper procedure to set blocking and nonblocking modes on a * file based channel. Invoked by generic IO level code. * * Results: * 0 if successful, errno when failed. * * Side effects: * Sets the device into blocking or non-blocking mode. * *---------------------------------------------------------------------- */ /* ARGSUSED */ static int FileBlockModeProc(instanceData, mode) ClientData instanceData; /* File state. */ int mode; /* The mode to set. Can be one of * TCL_MODE_BLOCKING or * TCL_MODE_NONBLOCKING. */ { FileState *fsPtr = (FileState *) instanceData; int curStatus; #ifndef USE_FIONBIO curStatus = fcntl(fsPtr->fd, F_GETFL); if (mode == TCL_MODE_BLOCKING) { curStatus &= (~(O_NONBLOCK)); } else { curStatus |= O_NONBLOCK; } if (fcntl(fsPtr->fd, F_SETFL, curStatus) < 0) { return errno; } curStatus = fcntl(fsPtr->fd, F_GETFL); #else if (mode == TCL_MODE_BLOCKING) { curStatus = 0; } else { curStatus = 1; } if (ioctl(fsPtr->fd, (int) FIONBIO, &curStatus) < 0) { return errno; } #endif return 0; } /* *---------------------------------------------------------------------- * * FileInputProc -- * * This procedure is invoked from the generic IO level to read * input from a file based channel. * * Results: * The number of bytes read is returned or -1 on error. An output * argument contains a POSIX error code if an error occurs, or zero. * * Side effects: * Reads input from the input device of the channel. * *---------------------------------------------------------------------- */ static int FileInputProc(instanceData, buf, toRead, errorCodePtr) ClientData instanceData; /* File state. */ char *buf; /* Where to store data read. */ int toRead; /* How much space is available * in the buffer? */ int *errorCodePtr; /* Where to store error code. */ { FileState *fsPtr = (FileState *) instanceData; int bytesRead; /* How many bytes were actually * read from the input device? */ *errorCodePtr = 0; /* * Assume there is always enough input available. This will block * appropriately, and read will unblock as soon as a short read is * possible, if the channel is in blocking mode. If the channel is * nonblocking, the read will never block. */ bytesRead = read(fsPtr->fd, buf, (size_t) toRead); if (bytesRead > -1) { return bytesRead; } *errorCodePtr = errno; return -1; } /* *---------------------------------------------------------------------- * * FileOutputProc-- * * This procedure is invoked from the generic IO level to write * output to a file channel. * * Results: * The number of bytes written is returned or -1 on error. An * output argument contains a POSIX error code if an error occurred, * or zero. * * Side effects: * Writes output on the output device of the channel. * *---------------------------------------------------------------------- */ static int FileOutputProc(instanceData, buf, toWrite, errorCodePtr) ClientData instanceData; /* File state. */ char *buf; /* The data buffer. */ int toWrite; /* How many bytes to write? */ int *errorCodePtr; /* Where to store error code. */ { FileState *fsPtr = (FileState *) instanceData; int written; *errorCodePtr = 0; written = write(fsPtr->fd, buf, (size_t) toWrite); if (written > -1) { return written; } *errorCodePtr = errno; return -1; } /* *---------------------------------------------------------------------- * * FileCloseProc -- * * This procedure is called from the generic IO level to perform * channel-type-specific cleanup when a file based channel is closed. * * Results: * 0 if successful, errno if failed. * * Side effects: * Closes the device of the channel. * *---------------------------------------------------------------------- */ static int FileCloseProc(instanceData, interp) ClientData instanceData; /* File state. */ Tcl_Interp *interp; /* For error reporting - unused. */ { FileState *fsPtr = (FileState *) instanceData; FileState **nextPtrPtr; int errorCode = 0; Tcl_DeleteFileHandler(fsPtr->fd); if (!TclInExit() || ((fsPtr->fd != 0) && (fsPtr->fd != 1) && (fsPtr->fd != 2))) { if (close(fsPtr->fd) < 0) { errorCode = errno; } } for (nextPtrPtr = &firstFilePtr; (*nextPtrPtr) != NULL; nextPtrPtr = &((*nextPtrPtr)->nextPtr)) { if ((*nextPtrPtr) == fsPtr) { (*nextPtrPtr) = fsPtr->nextPtr; break; } } ckfree((char *) fsPtr); return errorCode; } /* *---------------------------------------------------------------------- * * FileSeekProc -- * * This procedure is called by the generic IO level to move the * access point in a file based channel. * * Results: * -1 if failed, the new position if successful. An output * argument contains the POSIX error code if an error occurred, * or zero. * * Side effects: * Moves the location at which the channel will be accessed in * future operations. * *---------------------------------------------------------------------- */ static int FileSeekProc(instanceData, offset, mode, errorCodePtr) ClientData instanceData; /* File state. */ long offset; /* Offset to seek to. */ int mode; /* Relative to where * should we seek? Can be * one of SEEK_START, * SEEK_SET or SEEK_END. */ int *errorCodePtr; /* To store error code. */ { FileState *fsPtr = (FileState *) instanceData; int newLoc; newLoc = lseek(fsPtr->fd, offset, mode); *errorCodePtr = (newLoc == -1) ? errno : 0; return newLoc; } /* *---------------------------------------------------------------------- * * FileWatchProc -- * * Initialize the notifier to watch the fd from this channel. * * Results: * None. * * Side effects: * Sets up the notifier so that a future event on the channel will * be seen by Tcl. * *---------------------------------------------------------------------- */ static void FileWatchProc(instanceData, mask) ClientData instanceData; /* The file state. */ int mask; /* Events of interest; an OR-ed * combination of TCL_READABLE, * TCL_WRITABLE and TCL_EXCEPTION. */ { FileState *fsPtr = (FileState *) instanceData; /* * Make sure we only register for events that are valid on this file. * Note that we are passing Tcl_NotifyChannel directly to * Tcl_CreateFileHandler with the channel pointer as the client data. */ mask &= fsPtr->validMask; if (mask) { Tcl_CreateFileHandler(fsPtr->fd, mask, (Tcl_FileProc *) Tcl_NotifyChannel, (ClientData) fsPtr->channel); } else { Tcl_DeleteFileHandler(fsPtr->fd); } } /* *---------------------------------------------------------------------- * * FileGetHandleProc -- * * Called from Tcl_GetChannelFile to retrieve OS handles from * a file based channel. * * Results: * Returns TCL_OK with the fd in handlePtr, or TCL_ERROR if * there is no handle for the specified direction. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int FileGetHandleProc(instanceData, direction, handlePtr) ClientData instanceData; /* The file state. */ int direction; /* TCL_READABLE or TCL_WRITABLE */ ClientData *handlePtr; /* Where to store the handle. */ { FileState *fsPtr = (FileState *) instanceData; if (direction & fsPtr->validMask) { *handlePtr = (ClientData) fsPtr->fd; return TCL_OK; } else { return TCL_ERROR; } } /* *---------------------------------------------------------------------- * * TtySetOptionProc -- * * Sets an option on a channel. * * Results: * A standard Tcl result. Also sets interp->result on error if * interp is not NULL. * * Side effects: * May modify an option on a device. * Sets Error message if needed (by calling Tcl_BadChannelOption). * *---------------------------------------------------------------------- */ static int TtySetOptionProc(instanceData, interp, optionName, value) ClientData instanceData; /* File state. */ Tcl_Interp *interp; /* For error reporting - can be NULL. */ char *optionName; /* Which option to set? */ char *value; /* New value for option. */ { FileState *fsPtr = (FileState *) instanceData; unsigned int len; TtyAttrs tty; len = strlen(optionName); if ((len > 1) && (strncmp(optionName, "-mode", len) == 0)) { if (TtyParseMode(interp, value, &tty.baud, &tty.parity, &tty.data, &tty.stop) != TCL_OK) { return TCL_ERROR; } /* * system calls results should be checked there. -- dl */ TtySetAttributes(fsPtr->fd, &tty); return TCL_OK; } else { return Tcl_BadChannelOption(interp, optionName, "mode"); } } /* *---------------------------------------------------------------------- * * TtyGetOptionProc -- * * Gets a mode associated with an IO channel. If the optionName arg * is non NULL, retrieves the value of that option. If the optionName * arg is NULL, retrieves a list of alternating option names and * values for the given channel. * * Results: * A standard Tcl result. Also sets the supplied DString to the * string value of the option(s) returned. * * Side effects: * The string returned by this function is in static storage and * may be reused at any time subsequent to the call. * Sets Error message if needed (by calling Tcl_BadChannelOption). * *---------------------------------------------------------------------- */ static int TtyGetOptionProc(instanceData, interp, optionName, dsPtr) ClientData instanceData; /* File state. */ Tcl_Interp *interp; /* For error reporting - can be NULL. */ char *optionName; /* Option to get. */ Tcl_DString *dsPtr; /* Where to store value(s). */ { FileState *fsPtr = (FileState *) instanceData; unsigned int len; char buf[32]; TtyAttrs tty; if (optionName == NULL) { Tcl_DStringAppendElement(dsPtr, "-mode"); len = 0; } else { len = strlen(optionName); } if ((len == 0) || ((len > 1) && (strncmp(optionName, "-mode", len) == 0))) { TtyGetAttributes(fsPtr->fd, &tty); sprintf(buf, "%d,%c,%d,%d", tty.baud, tty.parity, tty.data, tty.stop); Tcl_DStringAppendElement(dsPtr, buf); return TCL_OK; } else { return Tcl_BadChannelOption(interp, optionName, "mode"); } } #undef DIRECT_BAUD #ifdef B4800 # if (B4800 == 4800) # define DIRECT_BAUD # endif #endif #ifdef DIRECT_BAUD # define TtyGetSpeed(baud) ((unsigned) (baud)) # define TtyGetBaud(speed) ((int) (speed)) #else static struct {int baud; unsigned long speed;} speeds[] = { #ifdef B0 {0, B0}, #endif #ifdef B50 {50, B50}, #endif #ifdef B75 {75, B75}, #endif #ifdef B110 {110, B110}, #endif #ifdef B134 {134, B134}, #endif #ifdef B150 {150, B150}, #endif #ifdef B200 {200, B200}, #endif #ifdef B300 {300, B300}, #endif #ifdef B600 {600, B600}, #endif #ifdef B1200 {1200, B1200}, #endif #ifdef B1800 {1800, B1800}, #endif #ifdef B2400 {2400, B2400}, #endif #ifdef B4800 {4800, B4800}, #endif #ifdef B9600 {9600, B9600}, #endif #ifdef B14400 {14400, B14400}, #endif #ifdef B19200 {19200, B19200}, #endif #ifdef EXTA {19200, EXTA}, #endif #ifdef B28800 {28800, B28800}, #endif #ifdef B38400 {38400, B38400}, #endif #ifdef EXTB {38400, EXTB}, #endif #ifdef B57600 {57600, B57600}, #endif #ifdef _B57600 {57600, _B57600}, #endif #ifdef B76800 {76800, B76800}, #endif #ifdef B115200 {115200, B115200}, #endif #ifdef _B115200 {115200, _B115200}, #endif #ifdef B153600 {153600, B153600}, #endif #ifdef B230400 {230400, B230400}, #endif #ifdef B307200 {307200, B307200}, #endif #ifdef B460800 {460800, B460800}, #endif {-1, 0} }; /* *--------------------------------------------------------------------------- * * TtyGetSpeed -- * * Given a baud rate, get the mask value that should be stored in * the termios, termio, or sgttyb structure in order to select that * baud rate. * * Results: * As above. * * Side effects: * None. * *--------------------------------------------------------------------------- */ static unsigned long TtyGetSpeed(baud) int baud; /* The baud rate to look up. */ { int bestIdx, bestDiff, i, diff; bestIdx = 0; bestDiff = 1000000; /* * If the baud rate does not correspond to one of the known mask values, * choose the mask value whose baud rate is closest to the specified * baud rate. */ for (i = 0; speeds[i].baud >= 0; i++) { diff = speeds[i].baud - baud; if (diff < 0) { diff = -diff; } if (diff < bestDiff) { bestIdx = i; bestDiff = diff; } } return speeds[bestIdx].speed; } /* *--------------------------------------------------------------------------- * * TtyGetBaud -- * * Given a speed mask value from a termios, termio, or sgttyb * structure, get the baus rate that corresponds to that mask value. * * Results: * As above. If the mask value was not recognized, 0 is returned. * * Side effects: * None. * *--------------------------------------------------------------------------- */ static int TtyGetBaud(speed) unsigned long speed; /* Speed mask value to look up. */ { int i; for (i = 0; speeds[i].baud >= 0; i++) { if (speeds[i].speed == speed) { return speeds[i].baud; } } return 0; } #endif /* !DIRECT_BAUD */ /* *--------------------------------------------------------------------------- * * TtyInit -- * * Given file descriptor that refers to a serial port, * initialize the serial port to a set of sane values so that * Tcl can talk to a device located on the serial port. * * Results: * None. * * Side effects: * Serial device initialized. * *--------------------------------------------------------------------------- */ static void TtyInit(fd) int fd; /* Open file descriptor for serial port to * be initialized. */ { #ifdef USE_TERMIOS struct termios termios; tcgetattr(fd, &termios); termios.c_iflag = IGNBRK; termios.c_oflag = 0; termios.c_lflag = 0; termios.c_cflag |= CREAD; termios.c_cc[VMIN] = 60; termios.c_cc[VTIME] = 2; tcsetattr(fd, TCSANOW, &termios); #else /* !USE_TERMIOS */ #ifdef USE_TERMIO struct termio termio; ioctl(fd, TCGETA, &termio); termio.c_iflag = IGNBRK; termio.c_oflag = 0; termio.c_lflag = 0; termio.c_cflag |= CREAD; termio.c_cc[VMIN] = 60; termio.c_cc[VTIME] = 2; ioctl(fd, TCSETAW, &termio); #else /* !USE_TERMIO */ #ifdef USE_SGTTY struct sgttyb sgttyb; ioctl(fd, TIOCGETP, &sgttyb); sgttyb.sg_flags &= (EVENP | ODDP); sgttyb.sg_flags |= RAW; ioctl(fd, TIOCSETP, &sgttyb); #endif /* USE_SGTTY */ #endif /* !USE_TERMIO */ #endif /* !USE_TERMIOS */ } /* *--------------------------------------------------------------------------- * * TtyGetAttributes -- * * Get the current attributes of the specified serial device. * * Results: * None. * * Side effects: * None. * *--------------------------------------------------------------------------- */ static void TtyGetAttributes(fd, ttyPtr) int fd; /* Open file descriptor for serial port to * be queried. */ TtyAttrs *ttyPtr; /* Buffer filled with serial port * attributes. */ { #ifdef USE_TERMIOS int parity, data; struct termios termios; tcgetattr(fd, &termios); ttyPtr->baud = TtyGetBaud(cfgetospeed(&termios)); parity = 'n'; #ifdef PAREXT switch ((int) (termios.c_cflag & (PARENB | PARODD | PAREXT))) { case PARENB : parity = 'e'; break; case PARENB | PARODD : parity = 'o'; break; case PARENB | PAREXT : parity = 's'; break; case PARENB | PARODD | PAREXT : parity = 'm'; break; } #else /* !PAREXT */ switch ((int) (termios.c_cflag & (PARENB | PARODD))) { case PARENB : parity = 'e'; break; case PARENB | PARODD : parity = 'o'; break; } #endif /* !PAREXT */ ttyPtr->parity = parity; data = termios.c_cflag & CSIZE; ttyPtr->data = (data == CS5) ? 5 : (data == CS6) ? 6 : (data == CS7) ? 7 : 8; ttyPtr->stop = (termios.c_cflag & CSTOPB) ? 2 : 1; #else /* !USE_TERMIOS */ #ifdef USE_TERMIO int parity, data; struct termio termio; ioctl(fd, TCGETA, &termio); ttyPtr->baud = TtyGetBaud(termio.c_cflag & CBAUD); parity = 'n'; switch (termio.c_cflag & (PARENB | PARODD | PAREXT)) { case PARENB : parity = 'e'; break; case PARENB | PARODD : parity = 'o'; break; case PARENB | PAREXT : parity = 's'; break; case PARENB | PARODD | PAREXT : parity = 'm'; break; } ttyPtr->parity = parity; data = termio.c_cflag & CSIZE; ttyPtr->data = (data == CS5) ? 5 : (data == CS6) ? 6 : (data == CS7) ? 7 : 8; ttyPtr->stop = (termio.c_cflag & CSTOPB) ? 2 : 1; #else /* !USE_TERMIO */ #ifdef USE_SGTTY int parity; struct sgttyb sgttyb; ioctl(fd, TIOCGETP, &sgttyb); ttyPtr->baud = TtyGetBaud(sgttyb.sg_ospeed); parity = 'n'; if (sgttyb.sg_flags & EVENP) { parity = 'e'; } else if (sgttyb.sg_flags & ODDP) { parity = 'o'; } ttyPtr->parity = parity; ttyPtr->data = (sgttyb.sg_flags & (EVENP | ODDP)) ? 7 : 8; ttyPtr->stop = 1; #else /* !USE_SGTTY */ ttyPtr->baud = 0; ttyPtr->parity = 'n'; ttyPtr->data = 0; ttyPtr->stop = 0; #endif /* !USE_SGTTY */ #endif /* !USE_TERMIO */ #endif /* !USE_TERMIOS */ } /* *--------------------------------------------------------------------------- * * TtySetAttributes -- * * Set the current attributes of the specified serial device. * * Results: * None. * * Side effects: * None. * *--------------------------------------------------------------------------- */ static void TtySetAttributes(fd, ttyPtr) int fd; /* Open file descriptor for serial port to * be modified. */ TtyAttrs *ttyPtr; /* Buffer containing new attributes for * serial port. */ { #ifdef USE_TERMIOS int parity, data, flag; struct termios termios; tcgetattr(fd, &termios); cfsetospeed(&termios, TtyGetSpeed(ttyPtr->baud)); cfsetispeed(&termios, TtyGetSpeed(ttyPtr->baud)); flag = 0; parity = ttyPtr->parity; if (parity != 'n') { flag |= PARENB; #ifdef PAREXT termios.c_cflag &= ~PAREXT; if ((parity == 'm') || (parity == 's')) { flag |= PAREXT; } #endif if ((parity == 'm') || (parity == 'o')) { flag |= PARODD; } } data = ttyPtr->data; flag |= (data == 5) ? CS5 : (data == 6) ? CS6 : (data == 7) ? CS7 : CS8; if (ttyPtr->stop == 2) { flag |= CSTOPB; } termios.c_cflag &= ~(PARENB | PARODD | CSIZE | CSTOPB); termios.c_cflag |= flag; tcsetattr(fd, TCSANOW, &termios); #else /* !USE_TERMIOS */ #ifdef USE_TERMIO int parity, data, flag; struct termio termio; ioctl(fd, TCGETA, &termio); termio.c_cflag &= ~CBAUD; termio.c_cflag |= TtyGetSpeed(ttyPtr->baud); flag = 0; parity = ttyPtr->parity; if (parity != 'n') { flag |= PARENB; if ((parity == 'm') || (parity == 's')) { flag |= PAREXT; } if ((parity == 'm') || (parity == 'o')) { flag |= PARODD; } } data = ttyPtr->data; flag |= (data == 5) ? CS5 : (data == 6) ? CS6 : (data == 7) ? CS7 : CS8; if (ttyPtr->stop == 2) { flag |= CSTOPB; } termio.c_cflag &= ~(PARENB | PARODD | PAREXT | CSIZE | CSTOPB); termio.c_cflag |= flag; ioctl(fd, TCSETAW, &termio); #else /* !USE_TERMIO */ #ifdef USE_SGTTY int parity; struct sgttyb sgttyb; ioctl(fd, TIOCGETP, &sgttyb); sgttyb.sg_ospeed = TtyGetSpeed(ttyPtr->baud); sgttyb.sg_ispeed = TtyGetSpeed(ttyPtr->baud); parity = ttyPtr->parity; if (parity == 'e') { sgttyb.sg_flags &= ~ODDP; sgttyb.sg_flags |= EVENP; } else if (parity == 'o') { sgttyb.sg_flags &= ~EVENP; sgttyb.sg_flags |= ODDP; } ioctl(fd, TIOCSETP, &sgttyb); #endif /* USE_SGTTY */ #endif /* !USE_TERMIO */ #endif /* !USE_TERMIOS */ } /* *--------------------------------------------------------------------------- * * TtyParseMode -- * * Parse the "-mode" argument to the fconfigure command. The argument * is of the form baud,parity,data,stop. * * Results: * The return value is TCL_OK if the argument was successfully * parsed, TCL_ERROR otherwise. If TCL_ERROR is returned, an * error message is left in interp->result (if interp is non-NULL). * * Side effects: * None. * *--------------------------------------------------------------------------- */ static int TtyParseMode(interp, mode, speedPtr, parityPtr, dataPtr, stopPtr) Tcl_Interp *interp; /* If non-NULL, interp for error return. */ CONST char *mode; /* Mode string to be parsed. */ int *speedPtr; /* Filled with baud rate from mode string. */ int *parityPtr; /* Filled with parity from mode string. */ int *dataPtr; /* Filled with data bits from mode string. */ int *stopPtr; /* Filled with stop bits from mode string. */ { int i, end; char parity; static char *bad = "bad value for -mode"; i = sscanf(mode, "%d,%c,%d,%d%n", speedPtr, &parity, dataPtr, stopPtr, &end); if ((i != 4) || (mode[end] != '\0')) { if (interp != NULL) { Tcl_AppendResult(interp, bad, ": should be baud,parity,data,stop", NULL); } return TCL_ERROR; } if (strchr("noems", parity) == NULL) { if (interp != NULL) { Tcl_AppendResult(interp, bad, " parity: should be n, o, e, m, or s", NULL); } return TCL_ERROR; } *parityPtr = parity; if ((*dataPtr < 5) || (*dataPtr > 8)) { if (interp != NULL) { Tcl_AppendResult(interp, bad, " data: should be 5, 6, 7, or 8", NULL); } return TCL_ERROR; } if ((*stopPtr < 0) || (*stopPtr > 2)) { if (interp != NULL) { Tcl_AppendResult(interp, bad, " stop: should be 1 or 2", NULL); } return TCL_ERROR; } return TCL_OK; } /* *---------------------------------------------------------------------- * * TclpOpenFileChannel -- * * Open an file based channel on Unix systems. * * Results: * The new channel or NULL. If NULL, the output argument * errorCodePtr is set to a POSIX error and an error message is * left in interp->result if interp is not NULL. * * Side effects: * May open the channel and may cause creation of a file on the * file system. * *---------------------------------------------------------------------- */ Tcl_Channel TclpOpenFileChannel(interp, fileName, modeString, permissions) Tcl_Interp *interp; /* Interpreter for error reporting; * can be NULL. */ char *fileName; /* Name of file to open. */ char *modeString; /* A list of POSIX open modes or * a string such as "rw". */ int permissions; /* If the open involves creating a * file, with what modes to create * it? */ { int fd, seekFlag, mode, channelPermissions; FileState *fsPtr; char *nativeName, channelName[20]; Tcl_DString buffer; Tcl_ChannelType *channelTypePtr; mode = TclGetOpenMode(interp, modeString, &seekFlag); if (mode == -1) { return NULL; } switch (mode & (O_RDONLY | O_WRONLY | O_RDWR)) { case O_RDONLY: channelPermissions = TCL_READABLE; break; case O_WRONLY: channelPermissions = TCL_WRITABLE; break; case O_RDWR: channelPermissions = (TCL_READABLE | TCL_WRITABLE); break; default: /* * This may occurr if modeString was "", for example. */ panic("TclpOpenFileChannel: invalid mode value"); return NULL; } nativeName = Tcl_TranslateFileName(interp, fileName, &buffer); if (nativeName == NULL) { return NULL; } fd = open(nativeName, mode, permissions); /* * If nativeName is not NULL, the buffer is valid and we must free * the storage. */ Tcl_DStringFree(&buffer); if (fd < 0) { if (interp != (Tcl_Interp *) NULL) { Tcl_AppendResult(interp, "couldn't open \"", fileName, "\": ", Tcl_PosixError(interp), (char *) NULL); } return NULL; } /* * Set close-on-exec flag on the fd so that child processes will not * inherit this fd. */ fcntl(fd, F_SETFD, FD_CLOEXEC); sprintf(channelName, "file%d", fd); fsPtr = (FileState *) ckalloc((unsigned) sizeof(FileState)); fsPtr->nextPtr = firstFilePtr; firstFilePtr = fsPtr; fsPtr->validMask = channelPermissions | TCL_EXCEPTION; fsPtr->fd = fd; if (isatty(fd)) { /* * Initialize the serial port to a set of sane parameters. * Especially important if the remote device is set to echo and * the serial port driver was also set to echo -- as soon as a char * were sent to the serial port, the remote device would echo it, * then the serial driver would echo it back to the device, etc. */ TtyInit(fd); channelTypePtr = &ttyChannelType; } else { channelTypePtr = &fileChannelType; } fsPtr->channel = Tcl_CreateChannel(channelTypePtr, channelName, (ClientData) fsPtr, channelPermissions); if (seekFlag) { if (Tcl_Seek(fsPtr->channel, 0, SEEK_END) < 0) { if (interp != (Tcl_Interp *) NULL) { Tcl_AppendResult(interp, "couldn't seek to end of file on \"", channelName, "\": ", Tcl_PosixError(interp), NULL); } Tcl_Close(NULL, fsPtr->channel); return NULL; } } if (channelTypePtr == &ttyChannelType) { /* * Gotcha. Most modems need a "\r" at the end of the command * sequence. If you just send "at\n", the modem will not respond * with "OK" because it never got a "\r" to actually invoke the * command. So, by default, newlines are translated to "\r\n" on * output to avoid "bug" reports that the serial port isn't working. */ if (Tcl_SetChannelOption(interp, fsPtr->channel, "-translation", "auto crlf") != TCL_OK) { Tcl_Close(NULL, fsPtr->channel); return NULL; } } return fsPtr->channel; } /* *---------------------------------------------------------------------- * * Tcl_MakeFileChannel -- * * Makes a Tcl_Channel from an existing OS level file handle. * * Results: * The Tcl_Channel created around the preexisting OS level file handle. * * Side effects: * None. * *---------------------------------------------------------------------- */ Tcl_Channel Tcl_MakeFileChannel(handle, mode) ClientData handle; /* OS level handle. */ int mode; /* ORed combination of TCL_READABLE and * TCL_WRITABLE to indicate file mode. */ { FileState *fsPtr; char channelName[20]; int fd = (int) handle; if (mode == 0) { return NULL; } sprintf(channelName, "file%d", fd); /* * Look to see if a channel with this fd and the same mode already exists. * If the fd is used, but the mode doesn't match, return NULL. */ for (fsPtr = firstFilePtr; fsPtr != NULL; fsPtr = fsPtr->nextPtr) { if (fsPtr->fd == fd) { return (mode == fsPtr->validMask) ? fsPtr->channel : NULL; } } fsPtr = (FileState *) ckalloc((unsigned) sizeof(FileState)); fsPtr->nextPtr = firstFilePtr; firstFilePtr = fsPtr; fsPtr->fd = fd; fsPtr->validMask = mode | TCL_EXCEPTION; fsPtr->channel = Tcl_CreateChannel(&fileChannelType, channelName, (ClientData) fsPtr, mode); return fsPtr->channel; } /* *---------------------------------------------------------------------- * * TcpBlockModeProc -- * * This procedure is invoked by the generic IO level to set blocking * and nonblocking mode on a TCP socket based channel. * * Results: * 0 if successful, errno when failed. * * Side effects: * Sets the device into blocking or nonblocking mode. * *---------------------------------------------------------------------- */ /* ARGSUSED */ static int TcpBlockModeProc(instanceData, mode) ClientData instanceData; /* Socket state. */ int mode; /* The mode to set. Can be one of * TCL_MODE_BLOCKING or * TCL_MODE_NONBLOCKING. */ { TcpState *statePtr = (TcpState *) instanceData; int setting; #ifndef USE_FIONBIO setting = fcntl(statePtr->fd, F_GETFL); if (mode == TCL_MODE_BLOCKING) { statePtr->flags &= (~(TCP_ASYNC_SOCKET)); setting &= (~(O_NONBLOCK)); } else { statePtr->flags |= TCP_ASYNC_SOCKET; setting |= O_NONBLOCK; } if (fcntl(statePtr->fd, F_SETFL, setting) < 0) { return errno; } #endif #ifdef USE_FIONBIO if (mode == TCL_MODE_BLOCKING) { statePtr->flags &= (~(TCP_ASYNC_SOCKET)); setting = 0; if (ioctl(statePtr->fd, (int) FIONBIO, &setting) == -1) { return errno; } } else { statePtr->flags |= TCP_ASYNC_SOCKET; setting = 1; if (ioctl(statePtr->fd, (int) FIONBIO, &setting) == -1) { return errno; } } #endif return 0; } /* *---------------------------------------------------------------------- * * WaitForConnect -- * * Waits for a connection on an asynchronously opened socket to * be completed. * * Results: * None. * * Side effects: * The socket is connected after this function returns. * *---------------------------------------------------------------------- */ static int WaitForConnect(statePtr, errorCodePtr) TcpState *statePtr; /* State of the socket. */ int *errorCodePtr; /* Where to store errors? */ { int timeOut; /* How long to wait. */ int state; /* Of calling TclWaitForFile. */ int flags; /* fcntl flags for the socket. */ /* * If an asynchronous connect is in progress, attempt to wait for it * to complete before reading. */ if (statePtr->flags & TCP_ASYNC_CONNECT) { if (statePtr->flags & TCP_ASYNC_SOCKET) { timeOut = 0; } else { timeOut = -1; } errno = 0; state = TclUnixWaitForFile(statePtr->fd, TCL_WRITABLE | TCL_EXCEPTION, timeOut); if (!(statePtr->flags & TCP_ASYNC_SOCKET)) { #ifndef USE_FIONBIO flags = fcntl(statePtr->fd, F_GETFL); flags &= (~(O_NONBLOCK)); (void) fcntl(statePtr->fd, F_SETFL, flags); #endif #ifdef USE_FIONBIO flags = 0; (void) ioctl(statePtr->fd, FIONBIO, &flags); #endif } if (state & TCL_EXCEPTION) { return -1; } if (state & TCL_WRITABLE) { statePtr->flags &= (~(TCP_ASYNC_CONNECT)); } else if (timeOut == 0) { *errorCodePtr = errno = EWOULDBLOCK; return -1; } } return 0; } /* *---------------------------------------------------------------------- * * TcpInputProc -- * * This procedure is invoked by the generic IO level to read input * from a TCP socket based channel. * * NOTE: We cannot share code with FilePipeInputProc because here * we must use recv to obtain the input from the channel, not read. * * Results: * The number of bytes read is returned or -1 on error. An output * argument contains the POSIX error code on error, or zero if no * error occurred. * * Side effects: * Reads input from the input device of the channel. * *---------------------------------------------------------------------- */ /* ARGSUSED */ static int TcpInputProc(instanceData, buf, bufSize, errorCodePtr) ClientData instanceData; /* Socket state. */ char *buf; /* Where to store data read. */ int bufSize; /* How much space is available * in the buffer? */ int *errorCodePtr; /* Where to store error code. */ { TcpState *statePtr = (TcpState *) instanceData; int bytesRead, state; *errorCodePtr = 0; state = WaitForConnect(statePtr, errorCodePtr); if (state != 0) { return -1; } bytesRead = recv(statePtr->fd, buf, bufSize, 0); if (bytesRead > -1) { return bytesRead; } if (errno == ECONNRESET) { /* * Turn ECONNRESET into a soft EOF condition. */ return 0; } *errorCodePtr = errno; return -1; } /* *---------------------------------------------------------------------- * * TcpOutputProc -- * * This procedure is invoked by the generic IO level to write output * to a TCP socket based channel. * * NOTE: We cannot share code with FilePipeOutputProc because here * we must use send, not write, to get reliable error reporting. * * Results: * The number of bytes written is returned. An output argument is * set to a POSIX error code if an error occurred, or zero. * * Side effects: * Writes output on the output device of the channel. * *---------------------------------------------------------------------- */ static int TcpOutputProc(instanceData, buf, toWrite, errorCodePtr) ClientData instanceData; /* Socket state. */ char *buf; /* The data buffer. */ int toWrite; /* How many bytes to write? */ int *errorCodePtr; /* Where to store error code. */ { TcpState *statePtr = (TcpState *) instanceData; int written; int state; /* Of waiting for connection. */ *errorCodePtr = 0; state = WaitForConnect(statePtr, errorCodePtr); if (state != 0) { return -1; } written = send(statePtr->fd, buf, toWrite, 0); if (written > -1) { return written; } *errorCodePtr = errno; return -1; } /* *---------------------------------------------------------------------- * * TcpCloseProc -- * * This procedure is invoked by the generic IO level to perform * channel-type-specific cleanup when a TCP socket based channel * is closed. * * Results: * 0 if successful, the value of errno if failed. * * Side effects: * Closes the socket of the channel. * *---------------------------------------------------------------------- */ /* ARGSUSED */ static int TcpCloseProc(instanceData, interp) ClientData instanceData; /* The socket to close. */ Tcl_Interp *interp; /* For error reporting - unused. */ { TcpState *statePtr = (TcpState *) instanceData; int errorCode = 0; /* * Delete a file handler that may be active for this socket if this * is a server socket - the file handler was created automatically * by Tcl as part of the mechanism to accept new client connections. * Channel handlers are already deleted in the generic IO channel * closing code that called this function, so we do not have to * delete them here. */ Tcl_DeleteFileHandler(statePtr->fd); if (close(statePtr->fd) < 0) { errorCode = errno; } ckfree((char *) statePtr); return errorCode; } /* *---------------------------------------------------------------------- * * TcpGetOptionProc -- * * Computes an option value for a TCP socket based channel, or a * list of all options and their values. * * Note: This code is based on code contributed by John Haxby. * * Results: * A standard Tcl result. The value of the specified option or a * list of all options and their values is returned in the * supplied DString. Sets Error message if needed. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int TcpGetOptionProc(instanceData, interp, optionName, dsPtr) ClientData instanceData; /* Socket state. */ Tcl_Interp *interp; /* For error reporting - can be NULL. */ char *optionName; /* Name of the option to * retrieve the value for, or * NULL to get all options and * their values. */ Tcl_DString *dsPtr; /* Where to store the computed * value; initialized by caller. */ { TcpState *statePtr = (TcpState *) instanceData; struct sockaddr_in sockname; struct sockaddr_in peername; struct hostent *hostEntPtr; int size = sizeof(struct sockaddr_in); size_t len = 0; char buf[128]; if (optionName != (char *) NULL) { len = strlen(optionName); } if ((len == 0) || ((len > 1) && (optionName[1] == 'p') && (strncmp(optionName, "-peername", len) == 0))) { if (getpeername(statePtr->fd, (struct sockaddr *) &peername, &size) >= 0) { if (len == 0) { Tcl_DStringAppendElement(dsPtr, "-peername"); Tcl_DStringStartSublist(dsPtr); } Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr)); hostEntPtr = gethostbyaddr((char *) &(peername.sin_addr), sizeof(peername.sin_addr), AF_INET); if (hostEntPtr != (struct hostent *) NULL) { Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name); } else { Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr)); } sprintf(buf, "%d", ntohs(peername.sin_port)); Tcl_DStringAppendElement(dsPtr, buf); if (len == 0) { Tcl_DStringEndSublist(dsPtr); } else { return TCL_OK; } } else { /* * getpeername failed - but if we were asked for all the options * (len==0), don't flag an error at that point because it could * be an fconfigure request on a server socket. (which have * no peer). same must be done on win&mac. */ if (len) { if (interp) { Tcl_AppendResult(interp, "can't get peername: ", Tcl_PosixError(interp), (char *) NULL); } return TCL_ERROR; } } } if ((len == 0) || ((len > 1) && (optionName[1] == 's') && (strncmp(optionName, "-sockname", len) == 0))) { if (getsockname(statePtr->fd, (struct sockaddr *) &sockname, &size) >= 0) { if (len == 0) { Tcl_DStringAppendElement(dsPtr, "-sockname"); Tcl_DStringStartSublist(dsPtr); } Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr)); hostEntPtr = gethostbyaddr((char *) &(sockname.sin_addr), sizeof(sockname.sin_addr), AF_INET); if (hostEntPtr != (struct hostent *) NULL) { Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name); } else { Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr)); } sprintf(buf, "%d", ntohs(sockname.sin_port)); Tcl_DStringAppendElement(dsPtr, buf); if (len == 0) { Tcl_DStringEndSublist(dsPtr); } else { return TCL_OK; } } else { if (interp) { Tcl_AppendResult(interp, "can't get sockname: ", Tcl_PosixError(interp), (char *) NULL); } return TCL_ERROR; } } if (len > 0) { return Tcl_BadChannelOption(interp, optionName, "peername sockname"); } return TCL_OK; } /* *---------------------------------------------------------------------- * * TcpWatchProc -- * * Initialize the notifier to watch the fd from this channel. * * Results: * None. * * Side effects: * Sets up the notifier so that a future event on the channel will * be seen by Tcl. * *---------------------------------------------------------------------- */ static void TcpWatchProc(instanceData, mask) ClientData instanceData; /* The socket state. */ int mask; /* Events of interest; an OR-ed * combination of TCL_READABLE, * TCL_WRITABLE and TCL_EXCEPTION. */ { TcpState *statePtr = (TcpState *) instanceData; /* * Make sure we don't mess with server sockets since they will never * be readable or writable at the Tcl level. This keeps Tcl scripts * from interfering with the -accept behavior. */ if (!statePtr->acceptProc) { if (mask) { Tcl_CreateFileHandler(statePtr->fd, mask, (Tcl_FileProc *) Tcl_NotifyChannel, (ClientData) statePtr->channel); } else { Tcl_DeleteFileHandler(statePtr->fd); } } } /* *---------------------------------------------------------------------- * * TcpGetHandleProc -- * * Called from Tcl_GetChannelFile to retrieve OS handles from inside * a TCP socket based channel. * * Results: * Returns TCL_OK with the fd in handlePtr, or TCL_ERROR if * there is no handle for the specified direction. * * Side effects: * None. * *---------------------------------------------------------------------- */ /* ARGSUSED */ static int TcpGetHandleProc(instanceData, direction, handlePtr) ClientData instanceData; /* The socket state. */ int direction; /* Not used. */ ClientData *handlePtr; /* Where to store the handle. */ { TcpState *statePtr = (TcpState *) instanceData; *handlePtr = (ClientData)statePtr->fd; return TCL_OK; } /* *---------------------------------------------------------------------- * * CreateSocket -- * * This function opens a new socket in client or server mode * and initializes the TcpState structure. * * Results: * Returns a new TcpState, or NULL with an error in interp->result, * if interp is not NULL. * * Side effects: * Opens a socket. * *---------------------------------------------------------------------- */ static TcpState * CreateSocket(interp, port, host, server, myaddr, myport, async) Tcl_Interp *interp; /* For error reporting; can be NULL. */ int port; /* Port number to open. */ char *host; /* Name of host on which to open port. * NULL implies INADDR_ANY */ int server; /* 1 if socket should be a server socket, * else 0 for a client socket. */ char *myaddr; /* Optional client-side address */ int myport; /* Optional client-side port */ int async; /* If nonzero and creating a client socket, * attempt to do an async connect. Otherwise * do a synchronous connect or bind. */ { int status, sock, asyncConnect, curState, origState; struct sockaddr_in sockaddr; /* socket address */ struct sockaddr_in mysockaddr; /* Socket address for client */ TcpState *statePtr; sock = -1; origState = 0; if (! CreateSocketAddress(&sockaddr, host, port)) { goto addressError; } if ((myaddr != NULL || myport != 0) && ! CreateSocketAddress(&mysockaddr, myaddr, myport)) { goto addressError; } sock = socket(AF_INET, SOCK_STREAM, 0); if (sock < 0) { goto addressError; } /* * Set the close-on-exec flag so that the socket will not get * inherited by child processes. */ fcntl(sock, F_SETFD, FD_CLOEXEC); /* * Set kernel space buffering */ TclSockMinimumBuffers(sock, SOCKET_BUFSIZE); asyncConnect = 0; status = 0; if (server) { /* * Set up to reuse server addresses automatically and bind to the * specified port. */ status = 1; (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &status, sizeof(status)); status = bind(sock, (struct sockaddr *) &sockaddr, sizeof(struct sockaddr)); if (status != -1) { status = listen(sock, SOMAXCONN); } } else { if (myaddr != NULL || myport != 0) { curState = 1; (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &curState, sizeof(curState)); status = bind(sock, (struct sockaddr *) &mysockaddr, sizeof(struct sockaddr)); if (status < 0) { goto bindError; } } /* * Attempt to connect. The connect may fail at present with an * EINPROGRESS but at a later time it will complete. The caller * will set up a file handler on the socket if she is interested in * being informed when the connect completes. */ if (async) { #ifndef USE_FIONBIO origState = fcntl(sock, F_GETFL); curState = origState | O_NONBLOCK; status = fcntl(sock, F_SETFL, curState); #endif #ifdef USE_FIONBIO curState = 1; status = ioctl(sock, FIONBIO, &curState); #endif } else { status = 0; } if (status > -1) { status = connect(sock, (struct sockaddr *) &sockaddr, sizeof(sockaddr)); if (status < 0) { if (errno == EINPROGRESS) { asyncConnect = 1; status = 0; } } } } bindError: if (status < 0) { if (interp != NULL) { Tcl_AppendResult(interp, "couldn't open socket: ", Tcl_PosixError(interp), (char *) NULL); } if (sock != -1) { close(sock); } return NULL; } /* * Allocate a new TcpState for this socket. */ statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState)); statePtr->flags = 0; if (asyncConnect) { statePtr->flags = TCP_ASYNC_CONNECT; } statePtr->fd = sock; return statePtr; addressError: if (sock != -1) { close(sock); } if (interp != NULL) { Tcl_AppendResult(interp, "couldn't open socket: ", Tcl_PosixError(interp), (char *) NULL); } return NULL; } /* *---------------------------------------------------------------------- * * CreateSocketAddress -- * * This function initializes a sockaddr structure for a host and port. * * Results: * 1 if the host was valid, 0 if the host could not be converted to * an IP address. * * Side effects: * Fills in the *sockaddrPtr structure. * *---------------------------------------------------------------------- */ static int CreateSocketAddress(sockaddrPtr, host, port) struct sockaddr_in *sockaddrPtr; /* Socket address */ char *host; /* Host. NULL implies INADDR_ANY */ int port; /* Port number */ { struct hostent *hostent; /* Host database entry */ struct in_addr addr; /* For 64/32 bit madness */ (void) memset((VOID *) sockaddrPtr, '\0', sizeof(struct sockaddr_in)); sockaddrPtr->sin_family = AF_INET; sockaddrPtr->sin_port = htons((unsigned short) (port & 0xFFFF)); if (host == NULL) { addr.s_addr = INADDR_ANY; } else { addr.s_addr = inet_addr(host); if (addr.s_addr == -1) { hostent = gethostbyname(host); if (hostent != NULL) { memcpy((VOID *) &addr, (VOID *) hostent->h_addr_list[0], (size_t) hostent->h_length); } else { #ifdef EHOSTUNREACH errno = EHOSTUNREACH; #else #ifdef ENXIO errno = ENXIO; #endif #endif return 0; /* error */ } } } /* * NOTE: On 64 bit machines the assignment below is rumored to not * do the right thing. Please report errors related to this if you * observe incorrect behavior on 64 bit machines such as DEC Alphas. * Should we modify this code to do an explicit memcpy? */ sockaddrPtr->sin_addr.s_addr = addr.s_addr; return 1; /* Success. */ } /* *---------------------------------------------------------------------- * * Tcl_OpenTcpClient -- * * Opens a TCP client socket and creates a channel around it. * * Results: * The channel or NULL if failed. An error message is returned * in the interpreter on failure. * * Side effects: * Opens a client socket and creates a new channel. * *---------------------------------------------------------------------- */ Tcl_Channel Tcl_OpenTcpClient(interp, port, host, myaddr, myport, async) Tcl_Interp *interp; /* For error reporting; can be NULL. */ int port; /* Port number to open. */ char *host; /* Host on which to open port. */ char *myaddr; /* Client-side address */ int myport; /* Client-side port */ int async; /* If nonzero, attempt to do an * asynchronous connect. Otherwise * we do a blocking connect. */ { TcpState *statePtr; char channelName[20]; /* * Create a new client socket and wrap it in a channel. */ statePtr = CreateSocket(interp, port, host, 0, myaddr, myport, async); if (statePtr == NULL) { return NULL; } statePtr->acceptProc = NULL; statePtr->acceptProcData = (ClientData) NULL; sprintf(channelName, "sock%d", statePtr->fd); statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE)); if (Tcl_SetChannelOption(interp, statePtr->channel, "-translation", "auto crlf") == TCL_ERROR) { Tcl_Close((Tcl_Interp *) NULL, statePtr->channel); return NULL; } return statePtr->channel; } /* *---------------------------------------------------------------------- * * Tcl_MakeTcpClientChannel -- * * Creates a Tcl_Channel from an existing client TCP socket. * * Results: * The Tcl_Channel wrapped around the preexisting TCP socket. * * Side effects: * None. * *---------------------------------------------------------------------- */ Tcl_Channel Tcl_MakeTcpClientChannel(sock) ClientData sock; /* The socket to wrap up into a channel. */ { TcpState *statePtr; char channelName[20]; statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState)); statePtr->fd = (int) sock; statePtr->acceptProc = NULL; statePtr->acceptProcData = (ClientData) NULL; sprintf(channelName, "sock%d", statePtr->fd); statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE)); if (Tcl_SetChannelOption((Tcl_Interp *) NULL, statePtr->channel, "-translation", "auto crlf") == TCL_ERROR) { Tcl_Close((Tcl_Interp *) NULL, statePtr->channel); return NULL; } return statePtr->channel; } /* *---------------------------------------------------------------------- * * Tcl_OpenTcpServer -- * * Opens a TCP server socket and creates a channel around it. * * Results: * The channel or NULL if failed. If an error occurred, an * error message is left in interp->result if interp is * not NULL. * * Side effects: * Opens a server socket and creates a new channel. * *---------------------------------------------------------------------- */ Tcl_Channel Tcl_OpenTcpServer(interp, port, myHost, acceptProc, acceptProcData) Tcl_Interp *interp; /* For error reporting - may be * NULL. */ int port; /* Port number to open. */ char *myHost; /* Name of local host. */ Tcl_TcpAcceptProc *acceptProc; /* Callback for accepting connections * from new clients. */ ClientData acceptProcData; /* Data for the callback. */ { TcpState *statePtr; char channelName[20]; /* * Create a new client socket and wrap it in a channel. */ statePtr = CreateSocket(interp, port, myHost, 1, NULL, 0, 0); if (statePtr == NULL) { return NULL; } statePtr->acceptProc = acceptProc; statePtr->acceptProcData = acceptProcData; /* * Set up the callback mechanism for accepting connections * from new clients. */ Tcl_CreateFileHandler(statePtr->fd, TCL_READABLE, TcpAccept, (ClientData) statePtr); sprintf(channelName, "sock%d", statePtr->fd); statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, (ClientData) statePtr, 0); return statePtr->channel; } /* *---------------------------------------------------------------------- * * TcpAccept -- * Accept a TCP socket connection. This is called by the event loop. * * Results: * None. * * Side effects: * Creates a new connection socket. Calls the registered callback * for the connection acceptance mechanism. * *---------------------------------------------------------------------- */ /* ARGSUSED */ static void TcpAccept(data, mask) ClientData data; /* Callback token. */ int mask; /* Not used. */ { TcpState *sockState; /* Client data of server socket. */ int newsock; /* The new client socket */ TcpState *newSockState; /* State for new socket. */ struct sockaddr_in addr; /* The remote address */ int len; /* For accept interface */ char channelName[20]; sockState = (TcpState *) data; len = sizeof(struct sockaddr_in); newsock = accept(sockState->fd, (struct sockaddr *)&addr, &len); if (newsock < 0) { return; } /* * Set close-on-exec flag to prevent the newly accepted socket from * being inherited by child processes. */ (void) fcntl(newsock, F_SETFD, FD_CLOEXEC); newSockState = (TcpState *) ckalloc((unsigned) sizeof(TcpState)); newSockState->flags = 0; newSockState->fd = newsock; newSockState->acceptProc = (Tcl_TcpAcceptProc *) NULL; newSockState->acceptProcData = (ClientData) NULL; sprintf(channelName, "sock%d", newsock); newSockState->channel = Tcl_CreateChannel(&tcpChannelType, channelName, (ClientData) newSockState, (TCL_READABLE | TCL_WRITABLE)); Tcl_SetChannelOption((Tcl_Interp *) NULL, newSockState->channel, "-translation", "auto crlf"); if (sockState->acceptProc != (Tcl_TcpAcceptProc *) NULL) { (sockState->acceptProc) (sockState->acceptProcData, newSockState->channel, inet_ntoa(addr.sin_addr), ntohs(addr.sin_port)); } } /* *---------------------------------------------------------------------- * * TclGetDefaultStdChannel -- * * Creates channels for standard input, standard output or standard * error output if they do not already exist. * * Results: * Returns the specified default standard channel, or NULL. * * Side effects: * May cause the creation of a standard channel and the underlying * file. * *---------------------------------------------------------------------- */ Tcl_Channel TclGetDefaultStdChannel(type) int type; /* One of TCL_STDIN, TCL_STDOUT, TCL_STDERR. */ { Tcl_Channel channel = NULL; int fd = 0; /* Initializations needed to prevent */ int mode = 0; /* compiler warning (used before set). */ char *bufMode = NULL; switch (type) { case TCL_STDIN: if ((lseek(0, (off_t) 0, SEEK_CUR) == -1) && (errno == EBADF)) { return (Tcl_Channel) NULL; } fd = 0; mode = TCL_READABLE; bufMode = "line"; break; case TCL_STDOUT: if ((lseek(1, (off_t) 0, SEEK_CUR) == -1) && (errno == EBADF)) { return (Tcl_Channel) NULL; } fd = 1; mode = TCL_WRITABLE; bufMode = "line"; break; case TCL_STDERR: if ((lseek(2, (off_t) 0, SEEK_CUR) == -1) && (errno == EBADF)) { return (Tcl_Channel) NULL; } fd = 2; mode = TCL_WRITABLE; bufMode = "none"; break; default: panic("TclGetDefaultStdChannel: Unexpected channel type"); break; } channel = Tcl_MakeFileChannel((ClientData) fd, mode); /* * Set up the normal channel options for stdio handles. */ Tcl_SetChannelOption(NULL, channel, "-translation", "auto"); Tcl_SetChannelOption(NULL, channel, "-buffering", bufMode); return channel; } /* *---------------------------------------------------------------------- * * Tcl_GetOpenFile -- * * Given a name of a channel registered in the given interpreter, * returns a FILE * for it. * * Results: * A standard Tcl result. If the channel is registered in the given * interpreter and it is managed by the "file" channel driver, and * it is open for the requested mode, then the output parameter * filePtr is set to a FILE * for the underlying file. On error, the * filePtr is not set, TCL_ERROR is returned and an error message is * left in interp->result. * * Side effects: * May invoke fdopen to create the FILE * for the requested file. * *---------------------------------------------------------------------- */ int Tcl_GetOpenFile(interp, string, forWriting, checkUsage, filePtr) Tcl_Interp *interp; /* Interpreter in which to find file. */ char *string; /* String that identifies file. */ int forWriting; /* 1 means the file is going to be used * for writing, 0 means for reading. */ int checkUsage; /* 1 means verify that the file was opened * in a mode that allows the access specified * by "forWriting". Ignored, we always * check that the channel is open for the * requested mode. */ ClientData *filePtr; /* Store pointer to FILE structure here. */ { Tcl_Channel chan; int chanMode; Tcl_ChannelType *chanTypePtr; ClientData data; int fd; FILE *f; chan = Tcl_GetChannel(interp, string, &chanMode); if (chan == (Tcl_Channel) NULL) { return TCL_ERROR; } if ((forWriting) && ((chanMode & TCL_WRITABLE) == 0)) { Tcl_AppendResult(interp, "\"", string, "\" wasn't opened for writing", (char *) NULL); return TCL_ERROR; } else if ((!(forWriting)) && ((chanMode & TCL_READABLE) == 0)) { Tcl_AppendResult(interp, "\"", string, "\" wasn't opened for reading", (char *) NULL); return TCL_ERROR; } /* * We allow creating a FILE * out of file based, pipe based and socket * based channels. We currently do not allow any other channel types, * because it is likely that stdio will not know what to do with them. */ chanTypePtr = Tcl_GetChannelType(chan); if ((chanTypePtr == &fileChannelType) || (chanTypePtr == &tcpChannelType) || (strcmp(chanTypePtr->typeName, "pipe") == 0)) { if (Tcl_GetChannelHandle(chan, (forWriting ? TCL_WRITABLE : TCL_READABLE), (ClientData*) &data) == TCL_OK) { fd = (int) data; /* * The call to fdopen below is probably dangerous, since it will * truncate an existing file if the file is being opened * for writing.... */ f = fdopen(fd, (forWriting ? "w" : "r")); if (f == NULL) { Tcl_AppendResult(interp, "cannot get a FILE * for \"", string, "\"", (char *) NULL); return TCL_ERROR; } *filePtr = (ClientData) f; return TCL_OK; } } Tcl_AppendResult(interp, "\"", string, "\" cannot be used to get a FILE *", (char *) NULL); return TCL_ERROR; } /* *---------------------------------------------------------------------- * * TclUnixWaitForFile -- * * This procedure waits synchronously for a file to become readable * or writable, with an optional timeout. * * Results: * The return value is an OR'ed combination of TCL_READABLE, * TCL_WRITABLE, and TCL_EXCEPTION, indicating the conditions * that are present on file at the time of the return. This * procedure will not return until either "timeout" milliseconds * have elapsed or at least one of the conditions given by mask * has occurred for file (a return value of 0 means that a timeout * occurred). No normal events will be serviced during the * execution of this procedure. * * Side effects: * Time passes. * *---------------------------------------------------------------------- */ int TclUnixWaitForFile(fd, mask, timeout) int fd; /* Handle for file on which to wait. */ int mask; /* What to wait for: OR'ed combination of * TCL_READABLE, TCL_WRITABLE, and * TCL_EXCEPTION. */ int timeout; /* Maximum amount of time to wait for one * of the conditions in mask to occur, in * milliseconds. A value of 0 means don't * wait at all, and a value of -1 means * wait forever. */ { Tcl_Time abortTime, now; struct timeval blockTime, *timeoutPtr; int index, bit, numFound, result = 0; static fd_mask readyMasks[3*MASK_SIZE]; /* This array reflects the readable/writable * conditions that were found to exist by the * last call to select. */ /* * If there is a non-zero finite timeout, compute the time when * we give up. */ if (timeout > 0) { TclpGetTime(&now); abortTime.sec = now.sec + timeout/1000; abortTime.usec = now.usec + (timeout%1000)*1000; if (abortTime.usec >= 1000000) { abortTime.usec -= 1000000; abortTime.sec += 1; } timeoutPtr = &blockTime; } else if (timeout == 0) { timeoutPtr = &blockTime; blockTime.tv_sec = 0; blockTime.tv_usec = 0; } else { timeoutPtr = NULL; } /* * Initialize the ready masks and compute the mask offsets. */ if (fd >= FD_SETSIZE) { panic("TclWaitForFile can't handle file id %d", fd); } memset((VOID *) readyMasks, 0, 3*MASK_SIZE*sizeof(fd_mask)); index = fd/(NBBY*sizeof(fd_mask)); bit = 1 << (fd%(NBBY*sizeof(fd_mask))); /* * Loop in a mini-event loop of our own, waiting for either the * file to become ready or a timeout to occur. */ while (1) { if (timeout > 0) { blockTime.tv_sec = abortTime.sec - now.sec; blockTime.tv_usec = abortTime.usec - now.usec; if (blockTime.tv_usec < 0) { blockTime.tv_sec -= 1; blockTime.tv_usec += 1000000; } if (blockTime.tv_sec < 0) { blockTime.tv_sec = 0; blockTime.tv_usec = 0; } } /* * Set the appropriate bit in the ready masks for the fd. */ if (mask & TCL_READABLE) { readyMasks[index] |= bit; } if (mask & TCL_WRITABLE) { (readyMasks+MASK_SIZE)[index] |= bit; } if (mask & TCL_EXCEPTION) { (readyMasks+2*(MASK_SIZE))[index] |= bit; } /* * Wait for the event or a timeout. */ numFound = select(fd+1, (SELECT_MASK *) &readyMasks[0], (SELECT_MASK *) &readyMasks[MASK_SIZE], (SELECT_MASK *) &readyMasks[2*MASK_SIZE], timeoutPtr); if (numFound == 1) { if (readyMasks[index] & bit) { result |= TCL_READABLE; } if ((readyMasks+MASK_SIZE)[index] & bit) { result |= TCL_WRITABLE; } if ((readyMasks+2*(MASK_SIZE))[index] & bit) { result |= TCL_EXCEPTION; } result &= mask; if (result) { break; } } if (timeout == 0) { break; } /* * The select returned early, so we need to recompute the timeout. */ TclpGetTime(&now); if ((abortTime.sec < now.sec) || ((abortTime.sec == now.sec) && (abortTime.usec <= now.usec))) { break; } } return result; }
Go to most recent revision | Compare with Previous | Blame | View Log