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78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
/* $Id: natpmpc.c,v 1.13 2012/08/21 17:23:38 nanard Exp $ */
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/* libnatpmp
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Copyright (c) 2007-2011, Thomas BERNARD
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All rights reserved.
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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 met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "natpmp.h"
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// Additional binding code in C to make this more convenient to call from
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// Haskell. libnatpmp expects that code which uses it to select() on an
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// internal socket, which we don't want to expose to the Haskell bindings user.
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//
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// This is mostly an adaptation of the code in the demo natpmpc.c to use the
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// select() loop.
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int readNatResponseSynchronously(natpmp_t* natpmp, natpmpresp_t * response)
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{
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fd_set fds;
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struct timeval timeout;
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int r;
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int sav_errno;
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do {
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FD_ZERO(&fds);
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FD_SET(natpmp->s, &fds);
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getnatpmprequesttimeout(natpmp, &timeout);
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r = select(FD_SETSIZE, &fds, NULL, NULL, &timeout);
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sav_errno = errno;
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if(r<0) {
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fprintf(stderr, "select(): errno=%d '%s'\n",
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sav_errno, strerror(sav_errno));
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return 1;
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}
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r = readnatpmpresponseorretry(natpmp, response);
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sav_errno = errno;
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/* printf("readnatpmpresponseorretry returned %d (%s)\n", */
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/* r, r==0?"OK":(r==NATPMP_TRYAGAIN?"TRY AGAIN":"FAILED")); */
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if(r<0 && r!=NATPMP_TRYAGAIN) {
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#ifdef ENABLE_STRNATPMPERR
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fprintf(stderr, "readnatpmpresponseorretry() failed : %s\n",
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strnatpmperr(r));
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#endif
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fprintf(stderr, " errno=%d '%s'\n",
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sav_errno, strerror(sav_errno));
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}
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} while(r==NATPMP_TRYAGAIN);
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return r;
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}
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