Mercurial > hg > octave-lojdl > gnulib-hg

annotate lib/recvfrom.c @ 12423:26b2c04c0bbf

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recvfrom: Allow NULL argument.
author Bruno Haible <bruno@clisp.org>
date Fri, 11 Dec 2009 01:31:21 +0100
parents e8d2c6fc33ad
children c2cbabec01dd
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1 /* recvfrom.c --- wrappers for Windows recvfrom function
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2
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3 Copyright (C) 2008-2009 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 /* Written by Paolo Bonzini */
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19
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20 #include <config.h>
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21
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22 #define WIN32_LEAN_AND_MEAN
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23 /* Get winsock2.h. */
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24 #include <sys/socket.h>
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25
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26 /* Get set_winsock_errno, FD_TO_SOCKET etc. */
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27 #include "w32sock.h"
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28
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29 #undef recvfrom
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30
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31 int
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32 rpl_recvfrom (int fd, void *buf, int len, int flags, struct sockaddr *from,
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33 int *fromlen)
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34 {
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35 int frombufsize = (from != NULL ? *fromlen : 0);
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36 SOCKET sock = FD_TO_SOCKET (fd);
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37 int r = recvfrom (sock, buf, len, flags, from, fromlen);
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38
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39 if (r < 0)
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40 set_winsock_errno ();
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41
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42 /* Winsock recvfrom() only returns a valid 'from' when the socket is
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43 connectionless. POSIX gives a valid 'from' for all types of sockets. */
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44 else if (from != NULL && *fromlen == frombufsize)
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45 rpl_getpeername (fd, from, fromlen);
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46
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47 return r;
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48 }