167 lines
4.1 KiB
C
167 lines
4.1 KiB
C
/*****************************************************************************
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*
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* NCSA DTM version 2.3
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* May 1, 1992
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*
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* NCSA DTM Version 2.3 source code and documentation are in the public
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* domain. Specifically, we give to the public domain all rights for future
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* licensing of the source code, all resale rights, and all publishing rights.
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*
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* We ask, but do not require, that the following message be included in all
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* derived works:
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*
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* Portions developed at the National Center for Supercomputing Applications at
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* the University of Illinois at Urbana-Champaign.
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*
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* THE UNIVERSITY OF ILLINOIS GIVES NO WARRANTY, EXPRESSED OR IMPLIED, FOR THE
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* SOFTWARE AND/OR DOCUMENTATION PROVIDED, INCLUDING, WITHOUT LIMITATION,
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* WARRANTY OF MERCHANTABILITY AND WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE
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*
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*****************************************************************************/
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/*********************************************************************
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**
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** $Header: /X11/mosaic/cvsroot/xmosaic3/libdtm/ninit.c,v 1.2 1995/10/13 06:33:18 spowers Exp $
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**
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**********************************************************************/
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/*
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#ifdef RCSLOG
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$Log: ninit.c,v $
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Revision 1.2 1995/10/13 06:33:18 spowers
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Solaris support added.
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Revision 1.1.1.1 1995/01/11 00:03:01 alanb
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New CVS source tree, Mosaic 2.5 beta 4
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* Revision 2.5 1994/12/29 23:40:06 alanb
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* I'm committing with a new symbolic revision number.
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*
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* Revision 1.1.1.1 1994/12/28 21:37:32 alanb
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*
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* Revision 1.1.1.1 1993/07/04 00:03:13 marca
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* Mosaic for X version 2 distribution
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*
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* Revision 1.1 1993/01/18 21:50:31 marca
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* I think I got it now.
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*
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* Revision 1.7 92/04/30 20:25:27 jplevyak
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* Changed Version to 2.3.
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*
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#endif
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*/
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/*
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Purpose : Functions to initialise name server address, fd and to
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to return it.
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*/
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#include <stdlib.h>
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#include <sys/types.h>
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#ifdef _ARCH_MSDOS
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#include <nmpcip.h>
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#else
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#endif
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#include <stdio.h>
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#include <string.h>
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#include "dtmnserv.h"
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#include "dtmint.h"
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#include "debug.h"
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static struct sockaddr_in nsaddr ; /* name server's address */
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static int nssockfd = -1 ; /* name server's socket */
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static char nameserver[ MAX132 ] ;
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/*
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name server address -
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dotted decimal: port number
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*/
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/*
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Function to initialise the name server's address by
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looking up the environment variable.
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Return values : DTMERROR on error.
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DTM_OK on success.
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Notes :
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Environment variable format :
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DTM_NAMESERVER=nethostid:portid
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e.g. DTM_NAMESERVER=141.142.221.66:9900
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*/
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#ifdef DTM_PROTOTYPES
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int dtm_ninit(void )
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#else
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int dtm_ninit()
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#endif
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{
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char *p ;
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DBGFLOW( "dtm_ninit called\n" );
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if( (p = getenv( DTM_NAMESERVER )) == NULL ) {
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DTMerrno = DTMENV ;
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DTMERR( "dtm_ninit: Env not setup" );
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return DTMERROR ;
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}
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/* Initialise name server's address, used in send() */
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strncpy( nameserver, p, MAX132 );
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DBGINT( "dtm_ninit: Nameserver is %s\n", nameserver );
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nsaddr.sin_family = AF_INET ;
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{
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char *portstr;
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portstr = strchr( p, ':' );
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if ( portstr == NULL ) {
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DTMerrno = DTMADDR;
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return DTMERROR;
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}
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*portstr++ = '\0';
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nsaddr.sin_addr.s_addr = inet_addr( p ) ;
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nsaddr.sin_port = (unsigned short)atol( portstr ) ;
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DBGMSG1("dtm_ninit: Nethostid = %x\n", ntohl( nsaddr.sin_addr.s_addr) );
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DBGMSG1("dtm_ninit: Portid = %d\n", ntohs( nsaddr.sin_port) );
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}
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/* Acquire socket to be used for sending to name server */
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if( (nssockfd = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP )) == -1 ){
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DTMerrno = DTMSOCK ;
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DBGFLOW( "dtm_ninit: Socket call fails" );
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return DTMERROR;
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}
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return DTM_OK;
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}
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/*
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Function to return name server's address and associated socket fd.
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*/
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#ifdef DTM_PROTOTYPES
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char *dtm_get_naddr(struct sockaddr_in *addr,int *sockfd )
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#else
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char *dtm_get_naddr( addr, sockfd )
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struct sockaddr_in *addr ;
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int *sockfd ;
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#endif
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{
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if( nssockfd < 0 ) if ( dtm_ninit() == DTMERROR)
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return (char *) DTMERROR;
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*addr = nsaddr ;
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*sockfd = nssockfd ;
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return (nssockfd < 0) ? NULL : nameserver ;
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}
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