Article View: comp.bugs.4bsd
Article #13194.3BSD dropping IP options
From: David P. Zimmerman
Date: Mon, 02 Jan 1989 07:08
Date: Mon, 02 Jan 1989 07:08
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Why does 4.3BSD drop the IP options on an ICMP reflection? See /sys/netinet/ip_icmp.c:icmp_reflect() for context. Really makes it hard to get a route recording ICMP echo to work, and I'm about ready to dive in and change things to meet the ICMP RFC standard. RFC792 says that turning an ICMP echo into an echo reply involves simply reversing the source and destination addresses, changing the ICMP type code to 0, and recomputing the checksum. Fixed in 4.4...? David -- David P. Zimmerman, the Dorm Networking Pilot Project, the UUCP Project, etc dpz@dorm.rutgers.edu rutgers!dpz dpzimmerman@zodiac.bitnet
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arc1-ca.pugleaf.net!utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!elbereth.rutgers.edu!dorm.rutgers.edu!dpzShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!elbereth.rutgers.edu!dorm.rutgers.edu!dpz From: dpz@dorm.rutgers.edu (David P. Zimmerman) Newsgroups: comp.bugs.4bsd Subject: 4.3BSD dropping IP options Message-ID: <Jan.2.02.08.14.1989.12820@dorm.rutgers.edu> Date: 2 Jan 89 07:08:15 GMT Organization: Rutgers University Lines: 17