But this also means that our recvfrom wrapper makes invalid memory accesses.
Here is a proposed patch:
2009-12-10 Bruno Haible<address@hidden>
* lib/recvfrom.c (rpl_recvfrom): Allow the from argument to be NULL.
--- lib/recvfrom.c.orig 2009-12-11 00:33:28.000000000 +0100
+++ lib/recvfrom.c 2009-12-11 00:14:22.000000000 +0100
@@ -1,6 +1,6 @@
/* recvfrom.c --- wrappers for Windows recvfrom function
- Copyright (C) 2008 Free Software Foundation, Inc.
+ Copyright (C) 2008-2009 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -32,7 +32,7 @@
rpl_recvfrom (int fd, void *buf, int len, int flags, struct sockaddr *from,
int *fromlen)
{
- int frombufsize = *fromlen;
+ int frombufsize = (from != NULL ? *fromlen : 0);
SOCKET sock = FD_TO_SOCKET (fd);
int r = recvfrom (sock, buf, len, flags, from, fromlen);
@@ -41,7 +41,7 @@
/* Winsock recvfrom() only returns a valid 'from' when the socket is
connectionless. POSIX gives a valid 'from' for all types of sockets. */
- else if (*fromlen == frombufsize)
+ else if (from != NULL&& *fromlen == frombufsize)
rpl_getpeername (fd, from, fromlen);