/* * 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 2007/07/10 15:04:23 duncan 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; CONST 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; socklen_t len; len = sizeof(int); getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)¤t, &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 *)¤t, &len); if (current < size) { len = sizeof(int); setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&size, len); } return TCL_OK; }