This would on NetBSD prevent UDP replies > 1432 bytes in size
transported over IPv4, because an IPv6 control message is applied
on an IPv4 socket, which will subsequently be refused.  Therefore,
apply that control mssage only on IPv6 sockets.
This commit is contained in:
he 2018-10-18 14:30:54 +00:00
parent 006e901ca7
commit 47fdcb82ac

View File

@ -1,4 +1,4 @@
/* $NetBSD: socket.c,v 1.23 2018/08/13 08:46:53 christos Exp $ */
/* $NetBSD: socket.c,v 1.24 2018/10/18 14:30:54 he Exp $ */
/*
* Copyright (C) 2004-2018 Internet Systems Consortium, Inc. ("ISC")
@ -1548,7 +1548,8 @@ build_msghdr_send(isc__socket_t *sock, isc_socketevent_t *dev,
#if defined(IPV6_USE_MIN_MTU)
if ((sock->type == isc_sockettype_udp) &&
((dev->attributes & ISC_SOCKEVENTATTR_USEMINMTU) != 0))
((dev->attributes & ISC_SOCKEVENTATTR_USEMINMTU) != 0) &&
(sock->pf == AF_INET6))
{
int use_min_mtu = 1; /* -1, 0, 1 */