/[dtapublic]/projs/trunk/shared_source/c_tcl_base_7_5_w_mods/tcliosock.c
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Revision 44 - (hide annotations) (download)
Fri Oct 14 02:09:58 2016 UTC (7 years, 9 months ago) by dashley
File MIME type: text/plain
File size: 3385 byte(s)
Rename for reorganization.
1 dashley 25 /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tcliosock.c,v 1.1.1.1 2001/06/13 04:42:17 dtashley Exp $ */
2    
3     /*
4     * tclIOSock.c --
5     *
6     * Common routines used by all socket based channel types.
7     *
8     * Copyright (c) 1995-1997 Sun Microsystems, Inc.
9     *
10     * See the file "license.terms" for information on usage and redistribution
11     * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
12     *
13     * RCS: @(#) $Id: tcliosock.c,v 1.1.1.1 2001/06/13 04:42:17 dtashley Exp $
14     */
15    
16     #include "tclInt.h"
17     #include "tclPort.h"
18    
19     /*
20     *---------------------------------------------------------------------------
21     *
22     * TclSockGetPort --
23     *
24     * Maps from a string, which could be a service name, to a port.
25     * Used by socket creation code to get port numbers and resolve
26     * registered service names to port numbers.
27     *
28     * Results:
29     * A standard Tcl result. On success, the port number is returned
30     * in portPtr. On failure, an error message is left in the interp's
31     * result.
32     *
33     * Side effects:
34     * None.
35     *
36     *---------------------------------------------------------------------------
37     */
38    
39     int
40     TclSockGetPort(interp, string, proto, portPtr)
41     Tcl_Interp *interp;
42     char *string; /* Integer or service name */
43     char *proto; /* "tcp" or "udp", typically */
44     int *portPtr; /* Return port number */
45     {
46     struct servent *sp; /* Protocol info for named services */
47     Tcl_DString ds;
48     char *native;
49    
50     if (Tcl_GetInt(NULL, string, portPtr) != TCL_OK) {
51     /*
52     * Don't bother translating 'proto' to native.
53     */
54    
55     native = Tcl_UtfToExternalDString(NULL, string, -1, &ds);
56     sp = getservbyname(native, proto); /* INTL: Native. */
57     Tcl_DStringFree(&ds);
58     if (sp != NULL) {
59     *portPtr = ntohs((unsigned short) sp->s_port);
60     return TCL_OK;
61     }
62     }
63     if (Tcl_GetInt(interp, string, portPtr) != TCL_OK) {
64     return TCL_ERROR;
65     }
66     if (*portPtr > 0xFFFF) {
67     Tcl_AppendResult(interp, "couldn't open socket: port number too high",
68     (char *) NULL);
69     return TCL_ERROR;
70     }
71     return TCL_OK;
72     }
73    
74     /*
75     *----------------------------------------------------------------------
76     *
77     * TclSockMinimumBuffers --
78     *
79     * Ensure minimum buffer sizes (non zero).
80     *
81     * Results:
82     * A standard Tcl result.
83     *
84     * Side effects:
85     * Sets SO_SNDBUF and SO_RCVBUF sizes.
86     *
87     *----------------------------------------------------------------------
88     */
89    
90     int
91     TclSockMinimumBuffers(sock, size)
92     int sock; /* Socket file descriptor */
93     int size; /* Minimum buffer size */
94     {
95     int current;
96     /*
97     * Should be socklen_t, but HP10.20 (g)cc chokes
98     */
99     size_t len;
100    
101     len = sizeof(int);
102     getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&current, &len);
103     if (current < size) {
104     len = sizeof(int);
105     setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&size, len);
106     }
107     len = sizeof(int);
108     getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&current, &len);
109     if (current < size) {
110     len = sizeof(int);
111     setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&size, len);
112     }
113     return TCL_OK;
114     }
115    
116    
117     /* $History: tcliosock.c $
118     *
119     * ***************** Version 1 *****************
120     * User: Dtashley Date: 1/02/01 Time: 1:33a
121     * Created in $/IjuScripter, IjuConsole/Source/Tcl Base
122     * Initial check-in.
123     */
124    
125     /* End of TCLIOSOCK.C */

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