/[dtapublic]/projs/trunk/shared_source/c_tcl_base_7_5_w_mods/tcliosock.c
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Revision 71 - (show annotations) (download)
Sat Nov 5 11:07:06 2016 UTC (7 years ago) by dashley
File MIME type: text/plain
File size: 2941 byte(s)
Set EOL properties appropriately to facilitate simultaneous Linux and Windows development.
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 */

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