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46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
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/*
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* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <ac/socket.h>
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/* Return a pair of descriptors that are connected to each other. The
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* 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 fds[1] will be readable on fds[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( int fds[2] )
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{
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struct sockaddr_in si;
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int rc, len = sizeof(si);
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int fd;
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fd = socket( AF_INET, SOCK_DGRAM, 0 );
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if (fd < 0)
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return fd;
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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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if ( rc = bind( fd, (struct sockaddr *)&si, len ) )
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{
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fail: tcp_close(fd);
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return rc;
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}
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if ( rc = getsockname( fd, (struct sockaddr *)&si, &len ) )
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goto fail;
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if ( rc = connect( fd, (struct sockaddr *)&si, len ) )
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goto fail;
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fds[0] = fds[1] = fd;
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return 0;
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}
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