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79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 1998-2015 The OpenLDAP Foundation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#include "portable.h"
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#include <ac/socket.h>
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#include <ac/unistd.h>
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#include <lutil.h>
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/* Return a pair of socket descriptors that are connected to each other.
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* The returned descriptors are suitable for use with select(). The two
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* descriptors may or may not be identical; the function may return
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* the same descriptor number in both slots. It is guaranteed that
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* data written on sds[1] will be readable on sds[0]. The returned
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* descriptors may be datagram oriented, so data should be written
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* in reasonably small pieces and read all at once. On Unix systems
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* this function is best implemented using a single pipe() call.
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*/
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int lutil_pair( ber_socket_t sds[2] )
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{
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#ifdef USE_PIPE
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return pipe( sds );
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#else
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struct sockaddr_in si;
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int rc;
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ber_socklen_t len = sizeof(si);
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ber_socket_t sd;
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sd = socket( AF_INET, SOCK_DGRAM, 0 );
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if ( sd == AC_SOCKET_INVALID ) {
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return sd;
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}
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(void) memset( (void*) &si, '\0', len );
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si.sin_family = AF_INET;
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si.sin_port = 0;
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si.sin_addr.s_addr = htonl( INADDR_LOOPBACK );
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rc = bind( sd, (struct sockaddr *)&si, len );
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if ( rc == AC_SOCKET_ERROR ) {
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tcp_close(sd);
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return rc;
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}
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rc = getsockname( sd, (struct sockaddr *)&si, &len );
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if ( rc == AC_SOCKET_ERROR ) {
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tcp_close(sd);
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return rc;
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}
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rc = connect( sd, (struct sockaddr *)&si, len );
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if ( rc == AC_SOCKET_ERROR ) {
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tcp_close(sd);
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return rc;
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}
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sds[0] = sd;
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#if !HAVE_WINSOCK
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sds[1] = dup( sds[0] );
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#else
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sds[1] = sds[0];
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#endif
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return 0;
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#endif
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}
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