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[/] [or1k/] [trunk/] [insight/] [tcl/] [generic/] [tclIOSock.c] - Blame information for rev 578

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Line No. Rev Author Line
1 578 markom
/*
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 * tclIOSock.c --
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 *
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 *      Common routines used by all socket based channel types.
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 *
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 * Copyright (c) 1995 Sun Microsystems, Inc.
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 *
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 * See the file "license.terms" for information on usage and redistribution
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 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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 *
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 * RCS: @(#) $Id: tclIOSock.c,v 1.1.1.1 2002-01-16 10:25:27 markom Exp $
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 */
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#include "tclInt.h"
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#include "tclPort.h"
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/*
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 *----------------------------------------------------------------------
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 *
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 * TclSockGetPort --
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 *
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 *      Maps from a string, which could be a service name, to a port.
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 *      Used by socket creation code to get port numbers and resolve
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 *      registered service names to port numbers.
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 *
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 * Results:
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 *      A standard Tcl result.  On success, the port number is
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 *      returned in portPtr. On failure, an error message is left in
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 *      interp->result.
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 *
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 * Side effects:
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 *      None.
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 *
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 *----------------------------------------------------------------------
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 */
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int
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TclSockGetPort(interp, string, proto, portPtr)
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    Tcl_Interp *interp;
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    char *string;               /* Integer or service name */
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    char *proto;                /* "tcp" or "udp", typically */
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    int *portPtr;               /* Return port number */
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{
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    struct servent *sp;         /* Protocol info for named services */
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    if (Tcl_GetInt(interp, string, portPtr) != TCL_OK) {
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        sp = getservbyname(string, proto);
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        if (sp != NULL) {
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            *portPtr = ntohs((unsigned short) sp->s_port);
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            Tcl_ResetResult(interp);    /* clear error message */
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            return TCL_OK;
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        }
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        return TCL_ERROR;
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    }
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    if (Tcl_GetInt(interp, string, portPtr) != TCL_OK) {
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        return TCL_ERROR;
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    }
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    if (*portPtr > 0xFFFF) {
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        Tcl_AppendResult(interp, "couldn't open socket: port number too high",
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                (char *) NULL);
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        return TCL_ERROR;
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    }
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    return TCL_OK;
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}
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/*
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 *----------------------------------------------------------------------
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 *
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 * TclSockMinimumBuffers --
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 *
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 *      Ensure minimum buffer sizes (non zero).
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 *
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 * Results:
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 *      A standard Tcl result.
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 *
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 * Side effects:
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 *      Sets SO_SNDBUF and SO_RCVBUF sizes.
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 *
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 *----------------------------------------------------------------------
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 */
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int
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TclSockMinimumBuffers(sock, size)
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    int sock;                   /* Socket file descriptor */
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    int size;                   /* Minimum buffer size */
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{
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    int current;
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    int len;
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    len = sizeof(int);
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    getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&current, &len);
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    if (current < size) {
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        len = sizeof(int);
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        setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&size, len);
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    }
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    len = sizeof(int);
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    getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&current, &len);
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    if (current < size) {
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        len = sizeof(int);
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        setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&size, len);
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    }
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    return TCL_OK;
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}

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