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	/* $Header$ */
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 */