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authorrmax <rmax>2009-06-15 16:24:44 (GMT)
committerrmax <rmax>2009-06-15 16:24:44 (GMT)
commit0acb18f87feafbdd931076405ca98c3ce30deca5 (patch)
treebc0c063c253ee9081f495aaf6923eb1b284bd6a1
parentc664dc994a0c00a615120c01bda0f55ddd4e428f (diff)
downloadtcl-0acb18f87feafbdd931076405ca98c3ce30deca5.zip
tcl-0acb18f87feafbdd931076405ca98c3ce30deca5.tar.gz
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* unix/tclUnixPort.h: Move all socket-related code from tclUnixChan.c
* unix/tclUnixChan.c: to tclUnixSock.c. * unix/tclUnixSock.c:
-rw-r--r--ChangeLog6
-rw-r--r--unix/tclUnixChan.c1143
-rw-r--r--unix/tclUnixPort.h4
-rw-r--r--unix/tclUnixSock.c1152
4 files changed, 1163 insertions, 1142 deletions
diff --git a/ChangeLog b/ChangeLog
index 3e4ba6d..84b5b14 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-06-15 Reinhard Max <max@suse.de>
+
+ * unix/tclUnixPort.h: Move all socket-related code from tclUnixChan.c
+ * unix/tclUnixChan.c: to tclUnixSock.c.
+ * unix/tclUnixSock.c:
+
2009-06-15 Donal K. Fellows <dkf@users.sf.net>
* tools/tcltk-man2html.tcl (make-man-pages): [Patch 557486]: Apply
diff --git a/unix/tclUnixChan.c b/unix/tclUnixChan.c
index 29da9e4..d8eaccc 100644
--- a/unix/tclUnixChan.c
+++ b/unix/tclUnixChan.c
@@ -10,7 +10,7 @@
* 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 1.100 2009/04/10 21:40:55 dgp Exp $
+ * RCS: @(#) $Id: tclUnixChan.c,v 1.101 2009/06/15 16:24:45 rmax Exp $
*/
#include "tclInt.h" /* Internal definitions for Tcl. */
@@ -144,60 +144,9 @@ typedef struct TtyAttrs {
}
/*
- * 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 /* SOMAXCONN */
-
-#if (SOMAXCONN < 100)
-# undef SOMAXCONN
-# define SOMAXCONN 100
-#endif /* SOMAXCONN < 100 */
-
-/*
- * 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(Tcl_Interp *interp, int port,
- const char *host, int server, const char *myaddr,
- int myport, int async);
-static int CreateSocketAddress(struct sockaddr_in *sockaddrPtr,
- const char *host, int port, int willBind,
- const char **errorMsgPtr);
static int FileBlockModeProc(ClientData instanceData, int mode);
static int FileCloseProc(ClientData instanceData,
Tcl_Interp *interp);
@@ -214,23 +163,6 @@ static int FileTruncateProc(ClientData instanceData,
static Tcl_WideInt FileWideSeekProc(ClientData instanceData,
Tcl_WideInt offset, int mode, int *errorCode);
static void FileWatchProc(ClientData instanceData, int mask);
-static void TcpAccept(ClientData data, int mask);
-static int TcpBlockModeProc(ClientData data, int mode);
-static int TcpCloseProc(ClientData instanceData,
- Tcl_Interp *interp);
-static int TcpClose2Proc(ClientData instanceData,
- Tcl_Interp *interp,
- int flags);
-static int TcpGetHandleProc(ClientData instanceData,
- int direction, ClientData *handlePtr);
-static int TcpGetOptionProc(ClientData instanceData,
- Tcl_Interp *interp, const char *optionName,
- Tcl_DString *dsPtr);
-static int TcpInputProc(ClientData instanceData, char *buf,
- int toRead, int *errorCode);
-static int TcpOutputProc(ClientData instanceData,
- const char *buf, int toWrite, int *errorCode);
-static void TcpWatchProc(ClientData instanceData, int mask);
#ifdef SUPPORTS_TTY
static void TtyGetAttributes(int fd, TtyAttrs *ttyPtr);
static int TtyGetOptionProc(ClientData instanceData,
@@ -250,9 +182,6 @@ static int TtySetOptionProc(ClientData instanceData,
Tcl_Interp *interp, const char *optionName,
const char *value);
#endif /* SUPPORTS_TTY */
-static int WaitForConnect(TcpState *statePtr, int *errorCodePtr);
-static Tcl_Channel MakeTcpClientChannelMode(ClientData tcpSocket,
- int mode);
/*
* This structure describes the channel type structure for file based IO:
@@ -305,30 +234,6 @@ static Tcl_ChannelType ttyChannelType = {
};
#endif /* SUPPORTS_TTY */
-/*
- * This structure describes the channel type structure for TCP socket
- * based IO:
- */
-
-static Tcl_ChannelType tcpChannelType = {
- "tcp", /* Type name. */
- TCL_CHANNEL_VERSION_5, /* v5 channel */
- 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. */
- TcpClose2Proc, /* Close2 proc. */
- TcpBlockModeProc, /* Set blocking or non-blocking mode.*/
- NULL, /* flush proc. */
- NULL, /* handler proc. */
- NULL, /* wide seek proc. */
- NULL, /* thread action proc. */
- NULL, /* truncate proc. */
-};
/*
*----------------------------------------------------------------------
@@ -1773,7 +1678,7 @@ Tcl_MakeFileChannel(
if (getsockname(fd, (struct sockaddr *)&sockaddr, &sockaddrLen) == 0
&& sockaddrLen > 0
&& sockaddr.sa_family == AF_INET) {
- return MakeTcpClientChannelMode((ClientData) INT2PTR(fd), mode);
+ return TclpMakeTcpClientChannelMode((ClientData) INT2PTR(fd), mode);
} else {
channelTypePtr = &fileChannelType;
fsPtr = (FileState *) ckalloc((unsigned) sizeof(FileState));
@@ -1791,1048 +1696,6 @@ Tcl_MakeFileChannel(
/*
*----------------------------------------------------------------------
*
- * TcpBlockModeProc --
- *
- * This function 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(
- 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;
-
- if (mode == TCL_MODE_BLOCKING) {
- CLEAR_BITS(statePtr->flags, TCP_ASYNC_SOCKET);
- } else {
- SET_BITS(statePtr->flags, TCP_ASYNC_SOCKET);
- }
- if (TclUnixSetBlockingMode(statePtr->fd, mode) < 0) {
- return errno;
- }
- return 0;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * WaitForConnect --
- *
- * Wait for a connection on an asynchronously opened socket to be
- * completed. In nonblocking mode, just test if the connection
- * has completed without blocking.
- *
- * Results:
- * 0 if the connection has completed, -1 if still in progress
- * or there is an error.
- *
- *----------------------------------------------------------------------
- */
-
-static int
-WaitForConnect(
- TcpState *statePtr, /* State of the socket. */
- int *errorCodePtr) /* Where to store errors? */
-{
- int timeOut; /* How long to wait. */
- int state; /* Of calling TclWaitForFile. */
-
- /*
- * 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 (state & TCL_EXCEPTION) {
- return -1;
- }
- if (state & TCL_WRITABLE) {
- CLEAR_BITS(statePtr->flags, TCP_ASYNC_CONNECT);
- } else if (timeOut == 0) {
- *errorCodePtr = errno = EWOULDBLOCK;
- return -1;
- }
- }
- return 0;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TcpInputProc --
- *
- * This function 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(
- 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;
-
- *errorCodePtr = 0;
- if (WaitForConnect(statePtr, errorCodePtr) != 0) {
- return -1;
- }
- bytesRead = recv(statePtr->fd, buf, (size_t) 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 function 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(
- ClientData instanceData, /* Socket state. */
- const 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;
-
- *errorCodePtr = 0;
- if (WaitForConnect(statePtr, errorCodePtr) != 0) {
- return -1;
- }
- written = send(statePtr->fd, buf, (size_t) toWrite, 0);
- if (written > -1) {
- return written;
- }
- *errorCodePtr = errno;
- return -1;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TcpCloseProc --
- *
- * This function 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(
- 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;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TcpClose2Proc --
- *
- * This function is called by the generic IO level to perform the channel
- * type specific part of a half-close: namely, a shutdown() on a socket.
- *
- * Results:
- * 0 if successful, the value of errno if failed.
- *
- * Side effects:
- * Shuts down one side of the socket.
- *
- *----------------------------------------------------------------------
- */
-
-static int
-TcpClose2Proc(
- ClientData instanceData, /* The socket to close. */
- Tcl_Interp *interp, /* For error reporting. */
- int flags) /* Flags that indicate which side to close. */
-{
- TcpState *statePtr = (TcpState *) instanceData;
- int errorCode = 0;
- int sd;
-
- /*
- * Shutdown the OS socket handle.
- */
- switch(flags)
- {
- case TCL_CLOSE_READ:
- sd=SHUT_RD;
- break;
- case TCL_CLOSE_WRITE:
- sd=SHUT_WR;
- break;
- default:
- if (interp) {
- Tcl_AppendResult(interp, "Socket close2proc called bidirectionally", NULL);
- }
- return TCL_ERROR;
- }
- if (shutdown(statePtr->fd,sd)<0) {
- errorCode = errno;
- }
-
- 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(
- ClientData instanceData, /* Socket state. */
- Tcl_Interp *interp, /* For error reporting - can be NULL. */
- const 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;
- socklen_t size = sizeof(struct sockaddr_in);
- size_t len = 0;
- char buf[TCL_INTEGER_SPACE];
-
- if (optionName != NULL) {
- len = strlen(optionName);
- }
-
- if ((len > 1) && (optionName[1] == 'e') &&
- (strncmp(optionName, "-error", len) == 0)) {
- socklen_t optlen = sizeof(int);
- int err, ret;
-
- ret = getsockopt(statePtr->fd, SOL_SOCKET, SO_ERROR,
- (char *)&err, &optlen);
- if (ret < 0) {
- err = errno;
- }
- if (err != 0) {
- Tcl_DStringAppend(dsPtr, Tcl_ErrnoMsg(err), -1);
- }
- return TCL_OK;
- }
-
- 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 = TclpGetHostByAddr( /* INTL: Native. */
- (char *) &peername.sin_addr,
- sizeof(peername.sin_addr), AF_INET);
- if (hostEntPtr != NULL) {
- Tcl_DString ds;
-
- Tcl_ExternalToUtfDString(NULL, hostEntPtr->h_name, -1, &ds);
- Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds));
- Tcl_DStringFree(&ds);
- } else {
- Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr));
- }
- TclFormatInt(buf, 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), 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 = TclpGetHostByAddr( /* INTL: Native. */
- (char *) &sockname.sin_addr,
- sizeof(sockname.sin_addr), AF_INET);
- if (hostEntPtr != NULL) {
- Tcl_DString ds;
-
- Tcl_ExternalToUtfDString(NULL, hostEntPtr->h_name, -1, &ds);
- Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds));
- Tcl_DStringFree(&ds);
- } else {
- Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr));
- }
- TclFormatInt(buf, 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), 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(
- 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_GetChannelHandle 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(
- ClientData instanceData, /* The socket state. */
- int direction, /* Not used. */
- ClientData *handlePtr) /* Where to store the handle. */
-{
- TcpState *statePtr = (TcpState *) instanceData;
-
- *handlePtr = (ClientData) INT2PTR(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 the interp's result,
- * if interp is not NULL.
- *
- * Side effects:
- * Opens a socket.
- *
- *----------------------------------------------------------------------
- */
-
-static TcpState *
-CreateSocket(
- Tcl_Interp *interp, /* For error reporting; can be NULL. */
- int port, /* Port number to open. */
- const 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. */
- const 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 = 0, sock = -1;
- struct sockaddr_in sockaddr; /* socket address */
- struct sockaddr_in mysockaddr; /* Socket address for client */
- TcpState *statePtr;
- const char *errorMsg = NULL;
-
- if (!CreateSocketAddress(&sockaddr, host, port, 0, &errorMsg)) {
- goto error;
- }
- if ((myaddr != NULL || myport != 0) &&
- !CreateSocketAddress(&mysockaddr, myaddr, myport, 1, &errorMsg)) {
- goto error;
- }
-
- sock = socket(AF_INET, SOCK_STREAM, 0);
- if (sock < 0) {
- goto error;
- }
-
- /*
- * 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);
-
- status = 0;
- if (server) {
- /*
- * Set up to reuse server addresses automatically and bind to the
- * specified port.
- */
-
- int reuseaddr = 1;
- (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
- (char *) &reuseaddr, sizeof(reuseaddr));
- status = bind(sock, (struct sockaddr *) &sockaddr,
- sizeof(struct sockaddr));
- if (status != -1) {
- status = listen(sock, SOMAXCONN);
- }
- } else {
- if (myaddr != NULL || myport != 0) {
- int reuseaddr = 1;
- (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
- (char *) &reuseaddr, sizeof(reuseaddr));
- status = bind(sock, (struct sockaddr *) &mysockaddr,
- sizeof(struct sockaddr));
- if (status < 0) {
- goto error;
- }
- }
-
- /*
- * 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) {
- status = TclUnixSetBlockingMode(sock, TCL_MODE_NONBLOCKING);
- if (status < 0) {
- goto error;
- }
- }
-
- status = connect(sock, (struct sockaddr *) &sockaddr,
- sizeof(sockaddr));
- if (status < 0) {
- if (errno == EINPROGRESS) {
- status = 0;
- } else {
- goto error;
- }
- }
- if (async) {
- /*
- * Restore blocking mode.
- */
- status = TclUnixSetBlockingMode(sock, TCL_MODE_BLOCKING);
- }
- }
-
- if (status < 0) {
-error:
- if (interp != NULL) {
- Tcl_AppendResult(interp, "couldn't open socket: ",
- Tcl_PosixError(interp), NULL);
- if (errorMsg != NULL) {
- Tcl_AppendResult(interp, " (", errorMsg, ")", NULL);
- }
- }
- if (sock != -1) {
- close(sock);
- }
- return NULL;
- }
-
- /*
- * Allocate a new TcpState for this socket.
- */
-
- statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
- statePtr->flags = async ? TCP_ASYNC_CONNECT : 0;
- statePtr->fd = sock;
-
- return statePtr;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * 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(
- struct sockaddr_in *sockaddrPtr, /* Socket address */
- const char *host, /* Host. NULL implies INADDR_ANY */
- int port, /* Port number */
- int willBind, /* Is this an address to bind() to or
- * to connect() to? */
- const char **errorMsgPtr) /* Place to store the error message
- * detail, if available. */
-{
-#ifdef HAVE_GETADDRINFO
- struct addrinfo hints, *resPtr = NULL;
- char *native;
- Tcl_DString ds;
- int result;
-
- if (host == NULL) {
- sockaddrPtr->sin_family = AF_INET;
- sockaddrPtr->sin_addr.s_addr = INADDR_ANY;
- addPort:
- sockaddrPtr->sin_port = htons((unsigned short) (port & 0xFFFF));
- return 1;
- }
-
- (void) memset(&hints, 0, sizeof(struct addrinfo));
- hints.ai_family = AF_INET;
- hints.ai_socktype = SOCK_STREAM;
- if (willBind) {
- hints.ai_flags |= AI_PASSIVE;
- }
-
- /*
- * Note that getaddrinfo() *is* thread-safe. If a platform doesn't get
- * that right, it shouldn't use this part of the code.
- */
-
- native = Tcl_UtfToExternalDString(NULL, host, -1, &ds);
- result = getaddrinfo(native, NULL, &hints, &resPtr);
- Tcl_DStringFree(&ds);
- if (result == 0) {
- memcpy(sockaddrPtr, resPtr->ai_addr, sizeof(struct sockaddr_in));
- freeaddrinfo(resPtr);
- goto addPort;
- }
-
- /*
- * Ought to use gai_strerror() here...
- */
-
- switch (result) {
- case EAI_NONAME:
- case EAI_SERVICE:
-#if defined(EAI_ADDRFAMILY) && EAI_ADDRFAMILY != EAI_NONAME
- case EAI_ADDRFAMILY:
-#endif
-#if defined(EAI_NODATA) && EAI_NODATA != EAI_NONAME
- case EAI_NODATA:
-#endif
- *errorMsgPtr = gai_strerror(result);
- errno = EHOSTUNREACH;
- return 0;
- case EAI_SYSTEM:
- return 0;
- default:
- *errorMsgPtr = gai_strerror(result);
- errno = ENXIO;
- return 0;
- }
-#else /* !HAVE_GETADDRINFO */
- struct in_addr addr; /* For 64/32 bit madness */
-
- (void) memset(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 {
- struct hostent *hostent; /* Host database entry */
- Tcl_DString ds;
- const char *native;
-
- if (host == NULL) {
- native = NULL;
- } else {
- native = Tcl_UtfToExternalDString(NULL, host, -1, &ds);
- }
- addr.s_addr = inet_addr(native); /* INTL: Native. */
-
- /*
- * This is 0xFFFFFFFF to ensure that it compares as a 32bit -1 on
- * either 32 or 64 bits systems.
- */
-
- if (addr.s_addr == 0xFFFFFFFF) {
- hostent = TclpGetHostByName(native); /* INTL: Native. */
- if (hostent != NULL) {
- memcpy(&addr, hostent->h_addr_list[0],
- (size_t) hostent->h_length);
- } else {
-#ifdef EHOSTUNREACH
- errno = EHOSTUNREACH;
-#else /* !EHOSTUNREACH */
-#ifdef ENXIO
- errno = ENXIO;
-#endif /* ENXIO */
-#endif /* EHOSTUNREACH */
- if (native != NULL) {
- Tcl_DStringFree(&ds);
- }
- return 0; /* Error. */
- }
- }
- if (native != NULL) {
- Tcl_DStringFree(&ds);
- }
- }
-
- /*
- * 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. */
-#endif /* HAVE_GETADDRINFO */
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * 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(
- Tcl_Interp *interp, /* For error reporting; can be NULL. */
- int port, /* Port number to open. */
- const char *host, /* Host on which to open port. */
- const 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[16 + TCL_INTEGER_SPACE];
-
- /*
- * 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 = 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(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(
- ClientData sock) /* The socket to wrap up into a channel. */
-{
- return MakeTcpClientChannelMode(sock, (TCL_READABLE | TCL_WRITABLE));
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * MakeTcpClientChannelMode --
- *
- * Creates a Tcl_Channel from an existing client TCP socket
- * with given mode.
- *
- * Results:
- * The Tcl_Channel wrapped around the preexisting TCP socket.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
-static Tcl_Channel
-MakeTcpClientChannelMode(
- ClientData sock, /* The socket to wrap up into a channel. */
- int mode) /* ORed combination of TCL_READABLE and
- * TCL_WRITABLE to indicate file mode. */
-{
- TcpState *statePtr;
- char channelName[16 + TCL_INTEGER_SPACE];
-
- statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
- statePtr->fd = PTR2INT(sock);
- statePtr->flags = 0;
- statePtr->acceptProc = NULL;
- statePtr->acceptProcData = NULL;
-
- sprintf(channelName, "sock%d", statePtr->fd);
-
- statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName,
- (ClientData) statePtr, mode);
- if (Tcl_SetChannelOption(NULL, statePtr->channel, "-translation",
- "auto crlf") == TCL_ERROR) {
- Tcl_Close(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 the interp's result if interp is not NULL.
- *
- * Side effects:
- * Opens a server socket and creates a new channel.
- *
- *----------------------------------------------------------------------
- */
-
-Tcl_Channel
-Tcl_OpenTcpServer(
- Tcl_Interp *interp, /* For error reporting - may be NULL. */
- int port, /* Port number to open. */
- const 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[16 + TCL_INTEGER_SPACE];
-
- /*
- * 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(
- 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 */
- socklen_t len; /* For accept interface */
- char channelName[16 + TCL_INTEGER_SPACE];
-
- 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 = NULL;
- newSockState->acceptProcData = NULL;
-
- sprintf(channelName, "sock%d", newsock);
- newSockState->channel = Tcl_CreateChannel(&tcpChannelType, channelName,
- (ClientData) newSockState, (TCL_READABLE | TCL_WRITABLE));
-
- Tcl_SetChannelOption(NULL, newSockState->channel, "-translation",
- "auto crlf");
-
- if (sockState->acceptProc != NULL) {
- sockState->acceptProc(sockState->acceptProcData,
- newSockState->channel, inet_ntoa(addr.sin_addr),
- ntohs(addr.sin_port));
- }
-}
-
-/*
- *----------------------------------------------------------------------
- *
* TclpGetDefaultStdChannel --
*
* Creates channels for standard input, standard output or standard error
@@ -2983,7 +1846,7 @@ Tcl_GetOpenFile(
#ifdef SUPPORTS_TTY
|| (chanTypePtr == &ttyChannelType)
#endif /* SUPPORTS_TTY */
- || (chanTypePtr == &tcpChannelType)
+ || (strcmp(chanTypePtr->typeName, "tcp") == 0)
|| (strcmp(chanTypePtr->typeName, "pipe") == 0)) {
if (Tcl_GetChannelHandle(chan,
(forWriting ? TCL_WRITABLE : TCL_READABLE),
diff --git a/unix/tclUnixPort.h b/unix/tclUnixPort.h
index 4b7d20b..bc387ca 100644
--- a/unix/tclUnixPort.h
+++ b/unix/tclUnixPort.h
@@ -19,7 +19,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclUnixPort.h,v 1.68 2008/09/03 05:43:32 dgp Exp $
+ * RCS: @(#) $Id: tclUnixPort.h,v 1.69 2009/06/15 16:24:45 rmax Exp $
*/
#ifndef _TCLUNIXPORT
@@ -620,5 +620,7 @@ MODULE_SCOPE struct passwd* TclpGetPwUid(uid_t uid);
MODULE_SCOPE struct group* TclpGetGrGid(gid_t gid);
MODULE_SCOPE struct hostent* TclpGetHostByName(const char *name);
MODULE_SCOPE struct hostent* TclpGetHostByAddr(const char *addr, int length, int type);
+MODULE_SCOPE Tcl_Channel TclpMakeTcpClientChannelMode(ClientData tcpSocket, int mode);
+
#endif /* _TCLUNIXPORT */
diff --git a/unix/tclUnixSock.c b/unix/tclUnixSock.c
index cbfe546..4ed2392 100644
--- a/unix/tclUnixSock.c
+++ b/unix/tclUnixSock.c
@@ -8,12 +8,120 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclUnixSock.c,v 1.21 2008/04/27 22:21:35 dkf Exp $
+ * RCS: @(#) $Id: tclUnixSock.c,v 1.22 2009/06/15 16:24:45 rmax Exp $
*/
#include "tclInt.h"
/*
+ * Helper macros to make parts of this file clearer. The macros do exactly
+ * what they say on the tin. :-) They also only ever refer to their arguments
+ * once, and so can be used without regard to side effects.
+ */
+
+#define SET_BITS(var, bits) ((var) |= (bits))
+#define CLEAR_BITS(var, bits) ((var) &= ~(bits))
+
+/*
+ * 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 /* SOMAXCONN */
+
+#if (SOMAXCONN < 100)
+# undef SOMAXCONN
+# define SOMAXCONN 100
+#endif /* SOMAXCONN < 100 */
+
+/*
+ * 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(Tcl_Interp *interp, int port,
+ const char *host, int server, const char *myaddr,
+ int myport, int async);
+static int CreateSocketAddress(struct sockaddr_in *sockaddrPtr,
+ const char *host, int port, int willBind,
+ const char **errorMsgPtr);
+static void TcpAccept(ClientData data, int mask);
+static int TcpBlockModeProc(ClientData data, int mode);
+static int TcpCloseProc(ClientData instanceData,
+ Tcl_Interp *interp);
+static int TcpClose2Proc(ClientData instanceData,
+ Tcl_Interp *interp,
+ int flags);
+static int TcpGetHandleProc(ClientData instanceData,
+ int direction, ClientData *handlePtr);
+static int TcpGetOptionProc(ClientData instanceData,
+ Tcl_Interp *interp, const char *optionName,
+ Tcl_DString *dsPtr);
+static int TcpInputProc(ClientData instanceData, char *buf,
+ int toRead, int *errorCode);
+static int TcpOutputProc(ClientData instanceData,
+ const char *buf, int toWrite, int *errorCode);
+static void TcpWatchProc(ClientData instanceData, int mask);
+static int WaitForConnect(TcpState *statePtr, int *errorCodePtr);
+/*
+ * This structure describes the channel type structure for TCP socket
+ * based IO:
+ */
+
+static Tcl_ChannelType tcpChannelType = {
+ "tcp", /* Type name. */
+ TCL_CHANNEL_VERSION_5, /* v5 channel */
+ 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. */
+ TcpClose2Proc, /* Close2 proc. */
+ TcpBlockModeProc, /* Set blocking or non-blocking mode.*/
+ NULL, /* flush proc. */
+ NULL, /* handler proc. */
+ NULL, /* wide seek proc. */
+ NULL, /* thread action proc. */
+ NULL, /* truncate proc. */
+};
+
+
+/*
* The following variable holds the network name of this host.
*/
@@ -181,6 +289,1048 @@ TclpFinalizeSockets(void)
}
/*
+ *----------------------------------------------------------------------
+ *
+ * TcpBlockModeProc --
+ *
+ * This function 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(
+ 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;
+
+ if (mode == TCL_MODE_BLOCKING) {
+ CLEAR_BITS(statePtr->flags, TCP_ASYNC_SOCKET);
+ } else {
+ SET_BITS(statePtr->flags, TCP_ASYNC_SOCKET);
+ }
+ if (TclUnixSetBlockingMode(statePtr->fd, mode) < 0) {
+ return errno;
+ }
+ return 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * WaitForConnect --
+ *
+ * Wait for a connection on an asynchronously opened socket to be
+ * completed. In nonblocking mode, just test if the connection
+ * has completed without blocking.
+ *
+ * Results:
+ * 0 if the connection has completed, -1 if still in progress
+ * or there is an error.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+WaitForConnect(
+ TcpState *statePtr, /* State of the socket. */
+ int *errorCodePtr) /* Where to store errors? */
+{
+ int timeOut; /* How long to wait. */
+ int state; /* Of calling TclWaitForFile. */
+
+ /*
+ * 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 (state & TCL_EXCEPTION) {
+ return -1;
+ }
+ if (state & TCL_WRITABLE) {
+ CLEAR_BITS(statePtr->flags, TCP_ASYNC_CONNECT);
+ } else if (timeOut == 0) {
+ *errorCodePtr = errno = EWOULDBLOCK;
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TcpInputProc --
+ *
+ * This function 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(
+ 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;
+
+ *errorCodePtr = 0;
+ if (WaitForConnect(statePtr, errorCodePtr) != 0) {
+ return -1;
+ }
+ bytesRead = recv(statePtr->fd, buf, (size_t) 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 function 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(
+ ClientData instanceData, /* Socket state. */
+ const 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;
+
+ *errorCodePtr = 0;
+ if (WaitForConnect(statePtr, errorCodePtr) != 0) {
+ return -1;
+ }
+ written = send(statePtr->fd, buf, (size_t) toWrite, 0);
+ if (written > -1) {
+ return written;
+ }
+ *errorCodePtr = errno;
+ return -1;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TcpCloseProc --
+ *
+ * This function 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(
+ 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;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TcpClose2Proc --
+ *
+ * This function is called by the generic IO level to perform the channel
+ * type specific part of a half-close: namely, a shutdown() on a socket.
+ *
+ * Results:
+ * 0 if successful, the value of errno if failed.
+ *
+ * Side effects:
+ * Shuts down one side of the socket.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+TcpClose2Proc(
+ ClientData instanceData, /* The socket to close. */
+ Tcl_Interp *interp, /* For error reporting. */
+ int flags) /* Flags that indicate which side to close. */
+{
+ TcpState *statePtr = (TcpState *) instanceData;
+ int errorCode = 0;
+ int sd;
+
+ /*
+ * Shutdown the OS socket handle.
+ */
+ switch(flags)
+ {
+ case TCL_CLOSE_READ:
+ sd=SHUT_RD;
+ break;
+ case TCL_CLOSE_WRITE:
+ sd=SHUT_WR;
+ break;
+ default:
+ if (interp) {
+ Tcl_AppendResult(interp, "Socket close2proc called bidirectionally", NULL);
+ }
+ return TCL_ERROR;
+ }
+ if (shutdown(statePtr->fd,sd)<0) {
+ errorCode = errno;
+ }
+
+ 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(
+ ClientData instanceData, /* Socket state. */
+ Tcl_Interp *interp, /* For error reporting - can be NULL. */
+ const 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;
+ socklen_t size = sizeof(struct sockaddr_in);
+ size_t len = 0;
+ char buf[TCL_INTEGER_SPACE];
+
+ if (optionName != NULL) {
+ len = strlen(optionName);
+ }
+
+ if ((len > 1) && (optionName[1] == 'e') &&
+ (strncmp(optionName, "-error", len) == 0)) {
+ socklen_t optlen = sizeof(int);
+ int err, ret;
+
+ ret = getsockopt(statePtr->fd, SOL_SOCKET, SO_ERROR,
+ (char *)&err, &optlen);
+ if (ret < 0) {
+ err = errno;
+ }
+ if (err != 0) {
+ Tcl_DStringAppend(dsPtr, Tcl_ErrnoMsg(err), -1);
+ }
+ return TCL_OK;
+ }
+
+ 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 = TclpGetHostByAddr( /* INTL: Native. */
+ (char *) &peername.sin_addr,
+ sizeof(peername.sin_addr), AF_INET);
+ if (hostEntPtr != NULL) {
+ Tcl_DString ds;
+
+ Tcl_ExternalToUtfDString(NULL, hostEntPtr->h_name, -1, &ds);
+ Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds));
+ Tcl_DStringFree(&ds);
+ } else {
+ Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr));
+ }
+ TclFormatInt(buf, 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), 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 = TclpGetHostByAddr( /* INTL: Native. */
+ (char *) &sockname.sin_addr,
+ sizeof(sockname.sin_addr), AF_INET);
+ if (hostEntPtr != NULL) {
+ Tcl_DString ds;
+
+ Tcl_ExternalToUtfDString(NULL, hostEntPtr->h_name, -1, &ds);
+ Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds));
+ Tcl_DStringFree(&ds);
+ } else {
+ Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr));
+ }
+ TclFormatInt(buf, 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), 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(
+ 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_GetChannelHandle 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(
+ ClientData instanceData, /* The socket state. */
+ int direction, /* Not used. */
+ ClientData *handlePtr) /* Where to store the handle. */
+{
+ TcpState *statePtr = (TcpState *) instanceData;
+
+ *handlePtr = (ClientData) INT2PTR(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 the interp's result,
+ * if interp is not NULL.
+ *
+ * Side effects:
+ * Opens a socket.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static TcpState *
+CreateSocket(
+ Tcl_Interp *interp, /* For error reporting; can be NULL. */
+ int port, /* Port number to open. */
+ const 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. */
+ const 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 = 0, sock = -1;
+ struct sockaddr_in sockaddr; /* socket address */
+ struct sockaddr_in mysockaddr; /* Socket address for client */
+ TcpState *statePtr;
+ const char *errorMsg = NULL;
+
+ if (!CreateSocketAddress(&sockaddr, host, port, 0, &errorMsg)) {
+ goto error;
+ }
+ if ((myaddr != NULL || myport != 0) &&
+ !CreateSocketAddress(&mysockaddr, myaddr, myport, 1, &errorMsg)) {
+ goto error;
+ }
+
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ if (sock < 0) {
+ goto error;
+ }
+
+ /*
+ * 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);
+
+ status = 0;
+ if (server) {
+ /*
+ * Set up to reuse server addresses automatically and bind to the
+ * specified port.
+ */
+
+ int reuseaddr = 1;
+ (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
+ (char *) &reuseaddr, sizeof(reuseaddr));
+ status = bind(sock, (struct sockaddr *) &sockaddr,
+ sizeof(struct sockaddr));
+ if (status != -1) {
+ status = listen(sock, SOMAXCONN);
+ }
+ } else {
+ if (myaddr != NULL || myport != 0) {
+ int reuseaddr = 1;
+ (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
+ (char *) &reuseaddr, sizeof(reuseaddr));
+ status = bind(sock, (struct sockaddr *) &mysockaddr,
+ sizeof(struct sockaddr));
+ if (status < 0) {
+ goto error;
+ }
+ }
+
+ /*
+ * 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) {
+ status = TclUnixSetBlockingMode(sock, TCL_MODE_NONBLOCKING);
+ if (status < 0) {
+ goto error;
+ }
+ }
+
+ status = connect(sock, (struct sockaddr *) &sockaddr,
+ sizeof(sockaddr));
+ if (status < 0) {
+ if (errno == EINPROGRESS) {
+ status = 0;
+ } else {
+ goto error;
+ }
+ }
+ if (async) {
+ /*
+ * Restore blocking mode.
+ */
+ status = TclUnixSetBlockingMode(sock, TCL_MODE_BLOCKING);
+ }
+ }
+
+ if (status < 0) {
+error:
+ if (interp != NULL) {
+ Tcl_AppendResult(interp, "couldn't open socket: ",
+ Tcl_PosixError(interp), NULL);
+ if (errorMsg != NULL) {
+ Tcl_AppendResult(interp, " (", errorMsg, ")", NULL);
+ }
+ }
+ if (sock != -1) {
+ close(sock);
+ }
+ return NULL;
+ }
+
+ /*
+ * Allocate a new TcpState for this socket.
+ */
+
+ statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
+ statePtr->flags = async ? TCP_ASYNC_CONNECT : 0;
+ statePtr->fd = sock;
+
+ return statePtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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(
+ struct sockaddr_in *sockaddrPtr, /* Socket address */
+ const char *host, /* Host. NULL implies INADDR_ANY */
+ int port, /* Port number */
+ int willBind, /* Is this an address to bind() to or
+ * to connect() to? */
+ const char **errorMsgPtr) /* Place to store the error message
+ * detail, if available. */
+{
+#ifdef HAVE_GETADDRINFO
+ struct addrinfo hints, *resPtr = NULL;
+ char *native;
+ Tcl_DString ds;
+ int result;
+
+ if (host == NULL) {
+ sockaddrPtr->sin_family = AF_INET;
+ sockaddrPtr->sin_addr.s_addr = INADDR_ANY;
+ addPort:
+ sockaddrPtr->sin_port = htons((unsigned short) (port & 0xFFFF));
+ return 1;
+ }
+
+ (void) memset(&hints, 0, sizeof(struct addrinfo));
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+ if (willBind) {
+ hints.ai_flags |= AI_PASSIVE;
+ }
+
+ /*
+ * Note that getaddrinfo() *is* thread-safe. If a platform doesn't get
+ * that right, it shouldn't use this part of the code.
+ */
+
+ native = Tcl_UtfToExternalDString(NULL, host, -1, &ds);
+ result = getaddrinfo(native, NULL, &hints, &resPtr);
+ Tcl_DStringFree(&ds);
+ if (result == 0) {
+ memcpy(sockaddrPtr, resPtr->ai_addr, sizeof(struct sockaddr_in));
+ freeaddrinfo(resPtr);
+ goto addPort;
+ }
+
+ /*
+ * Ought to use gai_strerror() here...
+ */
+
+ switch (result) {
+ case EAI_NONAME:
+ case EAI_SERVICE:
+#if defined(EAI_ADDRFAMILY) && EAI_ADDRFAMILY != EAI_NONAME
+ case EAI_ADDRFAMILY:
+#endif
+#if defined(EAI_NODATA) && EAI_NODATA != EAI_NONAME
+ case EAI_NODATA:
+#endif
+ *errorMsgPtr = gai_strerror(result);
+ errno = EHOSTUNREACH;
+ return 0;
+ case EAI_SYSTEM:
+ return 0;
+ default:
+ *errorMsgPtr = gai_strerror(result);
+ errno = ENXIO;
+ return 0;
+ }
+#else /* !HAVE_GETADDRINFO */
+ struct in_addr addr; /* For 64/32 bit madness */
+
+ (void) memset(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 {
+ struct hostent *hostent; /* Host database entry */
+ Tcl_DString ds;
+ const char *native;
+
+ if (host == NULL) {
+ native = NULL;
+ } else {
+ native = Tcl_UtfToExternalDString(NULL, host, -1, &ds);
+ }
+ addr.s_addr = inet_addr(native); /* INTL: Native. */
+
+ /*
+ * This is 0xFFFFFFFF to ensure that it compares as a 32bit -1 on
+ * either 32 or 64 bits systems.
+ */
+
+ if (addr.s_addr == 0xFFFFFFFF) {
+ hostent = TclpGetHostByName(native); /* INTL: Native. */
+ if (hostent != NULL) {
+ memcpy(&addr, hostent->h_addr_list[0],
+ (size_t) hostent->h_length);
+ } else {
+#ifdef EHOSTUNREACH
+ errno = EHOSTUNREACH;
+#else /* !EHOSTUNREACH */
+#ifdef ENXIO
+ errno = ENXIO;
+#endif /* ENXIO */
+#endif /* EHOSTUNREACH */
+ if (native != NULL) {
+ Tcl_DStringFree(&ds);
+ }
+ return 0; /* Error. */
+ }
+ }
+ if (native != NULL) {
+ Tcl_DStringFree(&ds);
+ }
+ }
+
+ /*
+ * 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. */
+#endif /* HAVE_GETADDRINFO */
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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(
+ Tcl_Interp *interp, /* For error reporting; can be NULL. */
+ int port, /* Port number to open. */
+ const char *host, /* Host on which to open port. */
+ const 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[16 + TCL_INTEGER_SPACE];
+
+ /*
+ * 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 = 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(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(
+ ClientData sock) /* The socket to wrap up into a channel. */
+{
+ return TclpMakeTcpClientChannelMode(sock, (TCL_READABLE | TCL_WRITABLE));
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpMakeTcpClientChannelMode --
+ *
+ * Creates a Tcl_Channel from an existing client TCP socket
+ * with given mode.
+ *
+ * Results:
+ * The Tcl_Channel wrapped around the preexisting TCP socket.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Channel
+TclpMakeTcpClientChannelMode(
+ ClientData sock, /* The socket to wrap up into a channel. */
+ int mode) /* ORed combination of TCL_READABLE and
+ * TCL_WRITABLE to indicate file mode. */
+{
+ TcpState *statePtr;
+ char channelName[16 + TCL_INTEGER_SPACE];
+
+ statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
+ statePtr->fd = PTR2INT(sock);
+ statePtr->flags = 0;
+ statePtr->acceptProc = NULL;
+ statePtr->acceptProcData = NULL;
+
+ sprintf(channelName, "sock%d", statePtr->fd);
+
+ statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName,
+ (ClientData) statePtr, mode);
+ if (Tcl_SetChannelOption(NULL, statePtr->channel, "-translation",
+ "auto crlf") == TCL_ERROR) {
+ Tcl_Close(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 the interp's result if interp is not NULL.
+ *
+ * Side effects:
+ * Opens a server socket and creates a new channel.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Channel
+Tcl_OpenTcpServer(
+ Tcl_Interp *interp, /* For error reporting - may be NULL. */
+ int port, /* Port number to open. */
+ const 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[16 + TCL_INTEGER_SPACE];
+
+ /*
+ * 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(
+ 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 */
+ socklen_t len; /* For accept interface */
+ char channelName[16 + TCL_INTEGER_SPACE];
+
+ 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 = NULL;
+ newSockState->acceptProcData = NULL;
+
+ sprintf(channelName, "sock%d", newsock);
+ newSockState->channel = Tcl_CreateChannel(&tcpChannelType, channelName,
+ (ClientData) newSockState, (TCL_READABLE | TCL_WRITABLE));
+
+ Tcl_SetChannelOption(NULL, newSockState->channel, "-translation",
+ "auto crlf");
+
+ if (sockState->acceptProc != NULL) {
+ sockState->acceptProc(sockState->acceptProcData,
+ newSockState->channel, inet_ntoa(addr.sin_addr),
+ ntohs(addr.sin_port));
+ }
+}
+
+/*
* Local Variables:
* mode: c
* c-basic-offset: 4