1 Jul 2002 15:54
kern/17448: ICMP needs frag ignored for IPv6 mapped IPv4 addresses
<rb-netbsd <at> bigscarychildren.net>
2002-07-01 13:54:28 GMT
2002-07-01 13:54:28 GMT
>Number: 17448 >Category: kern >Synopsis: ICMP needs frag ignored for IPv6 mapped IPv4 addresses >Confidential: no >Severity: serious >Priority: medium >Responsible: kern-bug-people >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Mon Jul 01 06:55:01 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Rick Byers >Release: NetBSD 1.6_BETA4 [June 26, 2002] >Organization: >Environment: System: NetBSD pbrane.Apenheul.BigScaryChildren.net 1.6_BETA4 NetBSD 1.6_BETA4 (PBRANE) #11: Sun Jun 30 17:40:57 EDT 2002 rick <at> pbrane.Apenheul.BigScaryChildren.net:/usr/src/sys/arch/i386/compile/PBRANE i386 Architecture: i386 Machine: i386 >Description: IPv6 packets with IPv4 addresses (::ffff:*) are sent using the IPv6 stack. However, when an IPv4 ICMP needs-frag packet arrives, we only check the IPv4 TCP tcbtable for matching connections (tcp_subr.c rev 1.127 line 1430). When no matching PCB is found, the ICMP message is just ignored. This results in PMTU discovery failing badly whenever an IPv6(Continue reading)
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