shared_source/c_tcl_base_7_5_w_mods/tcliosock.c

/* $Header$ */
/* 
 * tclIOSock.c --
 *
 *      Common routines used by all socket based channel types.
 *
 * 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: tcliosock.c,v 1.1.1.1 2001/06/13 04:42:17 dtashley Exp $
 */

#include "tclInt.h"
#include "tclPort.h"

/*
 *---------------------------------------------------------------------------
 *
 * TclSockGetPort --
 *
 *      Maps from a string, which could be a service name, to a port.
 *      Used by socket creation code to get port numbers and resolve
 *      registered service names to port numbers.
 *
 * Results:
 *      A standard Tcl result.  On success, the port number is returned
 *      in portPtr. On failure, an error message is left in the interp's
 *      result.
 *
 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

int
TclSockGetPort(interp, string, proto, portPtr)
    Tcl_Interp *interp;
    char *string;               /* Integer or service name */
    char *proto;                /* "tcp" or "udp", typically */
    int *portPtr;               /* Return port number */
{
    struct servent *sp;         /* Protocol info for named services */
    Tcl_DString ds;
    char *native;

    if (Tcl_GetInt(NULL, string, portPtr) != TCL_OK) {
        /*
         * Don't bother translating 'proto' to native.
         */
         
        native = Tcl_UtfToExternalDString(NULL, string, -1, &ds);
        sp = getservbyname(native, proto);              /* INTL: Native. */
        Tcl_DStringFree(&ds);
        if (sp != NULL) {
            *portPtr = ntohs((unsigned short) sp->s_port);
            return TCL_OK;
        }
    }
    if (Tcl_GetInt(interp, string, portPtr) != TCL_OK) {
        return TCL_ERROR;
    }
    if (*portPtr > 0xFFFF) {
        Tcl_AppendResult(interp, "couldn't open socket: port number too high",
                (char *) NULL);
        return TCL_ERROR;
    }
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TclSockMinimumBuffers --
 *
 *      Ensure minimum buffer sizes (non zero).
 *
 * Results:
 *      A standard Tcl result.
 *
 * Side effects:
 *      Sets SO_SNDBUF and SO_RCVBUF sizes.
 *
 *----------------------------------------------------------------------
 */

int
TclSockMinimumBuffers(sock, size)
    int sock;                   /* Socket file descriptor */
    int size;                   /* Minimum buffer size */
{
    int current;
    /*
     * Should be socklen_t, but HP10.20 (g)cc chokes
     */
    size_t len;

    len = sizeof(int);
    getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&current, &len);
    if (current < size) {
        len = sizeof(int);
        setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&size, len);
    }
    len = sizeof(int);
    getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&current, &len);
    if (current < size) {
        len = sizeof(int);
        setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&size, len);
    }
    return TCL_OK;
}

/* End of tcliosock.c */
1	dashley	71	/* $Header$ */
2			/*
3			* tclIOSock.c --
4			*
5			* Common routines used by all socket based channel types.
6			*
7			* Copyright (c) 1995-1997 Sun Microsystems, Inc.
8			*
9			* See the file "license.terms" for information on usage and redistribution
10			* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
11			*
12			* RCS: @(#) $Id: tcliosock.c,v 1.1.1.1 2001/06/13 04:42:17 dtashley Exp $
13			*/
14
15			#include "tclInt.h"
16			#include "tclPort.h"
17
18			/*
19			*---------------------------------------------------------------------------
20			*
21			* TclSockGetPort --
22			*
23			* Maps from a string, which could be a service name, to a port.
24			* Used by socket creation code to get port numbers and resolve
25			* registered service names to port numbers.
26			*
27			* Results:
28			* A standard Tcl result. On success, the port number is returned
29			* in portPtr. On failure, an error message is left in the interp's
30			* result.
31			*
32			* Side effects:
33			* None.
34			*
35			*---------------------------------------------------------------------------
36			*/
37
38			int
39			TclSockGetPort(interp, string, proto, portPtr)
40			Tcl_Interp *interp;
41			char string; / Integer or service name */
42			char proto; / "tcp" or "udp", typically */
43			int portPtr; / Return port number */
44			{
45			struct servent sp; / Protocol info for named services */
46			Tcl_DString ds;
47			char *native;
48
49			if (Tcl_GetInt(NULL, string, portPtr) != TCL_OK) {
50			/*
51			* Don't bother translating 'proto' to native.
52			*/
53
54			native = Tcl_UtfToExternalDString(NULL, string, -1, &ds);
55			sp = getservbyname(native, proto); /* INTL: Native. */
56			Tcl_DStringFree(&ds);
57			if (sp != NULL) {
58			*portPtr = ntohs((unsigned short) sp->s_port);
59			return TCL_OK;
60			}
61			}
62			if (Tcl_GetInt(interp, string, portPtr) != TCL_OK) {
63			return TCL_ERROR;
64			}
65			if (*portPtr > 0xFFFF) {
66			Tcl_AppendResult(interp, "couldn't open socket: port number too high",
67			(char *) NULL);
68			return TCL_ERROR;
69			}
70			return TCL_OK;
71			}
72
73			/*
74			*----------------------------------------------------------------------
75			*
76			* TclSockMinimumBuffers --
77			*
78			* Ensure minimum buffer sizes (non zero).
79			*
80			* Results:
81			* A standard Tcl result.
82			*
83			* Side effects:
84			* Sets SO_SNDBUF and SO_RCVBUF sizes.
85			*
86			*----------------------------------------------------------------------
87			*/
88
89			int
90			TclSockMinimumBuffers(sock, size)
91			int sock; /* Socket file descriptor */
92			int size; /* Minimum buffer size */
93			{
94			int current;
95			/*
96			* Should be socklen_t, but HP10.20 (g)cc chokes
97			*/
98			size_t len;
99
100			len = sizeof(int);
101			getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&current, &len);
102			if (current < size) {
103			len = sizeof(int);
104			setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&size, len);
105			}
106			len = sizeof(int);
107			getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&current, &len);
108			if (current < size) {
109			len = sizeof(int);
110			setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&size, len);
111			}
112			return TCL_OK;
113			}
114
115			/* End of tcliosock.c */