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69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/*
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* Copyright (c) 2010, Oracle America, Inc.
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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 provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <alloca.h>
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#include <errno.h>
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#include <stdio.h>
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#include <netdb.h>
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#include <string.h>
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#include <rpc/rpc.h>
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#include <rpc/clnt.h>
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#include <rpc/pmap_clnt.h>
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#include <sys/socket.h>
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int
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getrpcport (const char *host, u_long prognum, u_long versnum, u_int proto)
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{
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struct sockaddr_in addr;
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struct hostent hostbuf, *hp;
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size_t buflen;
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char *buffer;
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int herr;
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buflen = 1024;
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buffer = __alloca (buflen);
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while (__gethostbyname_r (host, &hostbuf, buffer, buflen, &hp, &herr) != 0
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|| hp == NULL)
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if (herr != NETDB_INTERNAL || errno != ERANGE)
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return 0;
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else
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{
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/* Enlarge the buffer. */
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buflen *= 2;
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buffer = __alloca (buflen);
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}
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memcpy ((char *) &addr.sin_addr, hp->h_addr, hp->h_length);
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addr.sin_family = AF_INET;
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addr.sin_port = 0;
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return pmap_getport (&addr, prognum, versnum, proto);
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}
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