From 694d6ae32fbed0a62bc9d73f279db205815681e3 Mon Sep 17 00:00:00 2001 From: Julian Elischer Date: Wed, 30 Sep 2020 13:03:15 -0700 Subject: Use the ICMP error response facility Add code in IPv6 to send ICMP packets while processing extension headers. Add some accounting in processing IPV6 Extension headers which allows us to report meaningful information back in ICMP parameter problem packets. IPv4 also needs to send a message when an unsupported protocol is requested. Add some tests to generate both ipv4 and ipv6 packets with various errors and check the responses. Add some new checkers and cleanup some inconsistencies in the messages in that file. Add new error types for the ICMPv4/6 generators. Fix a bug in the ICMPv4 generator that stopped it from generating "Unknown protocol" messages. Updates #2211 PiperOrigin-RevId: 334661716 --- pkg/tcpip/header/ipv6.go | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'pkg/tcpip/header/ipv6.go') diff --git a/pkg/tcpip/header/ipv6.go b/pkg/tcpip/header/ipv6.go index 0761a1807..ef454b313 100644 --- a/pkg/tcpip/header/ipv6.go +++ b/pkg/tcpip/header/ipv6.go @@ -34,6 +34,9 @@ const ( hopLimit = 7 v6SrcAddr = 8 v6DstAddr = v6SrcAddr + IPv6AddressSize + + // IPv6FixedHeaderSize is the size of the fixed header. + IPv6FixedHeaderSize = v6DstAddr + IPv6AddressSize ) // IPv6Fields contains the fields of an IPv6 packet. It is used to describe the @@ -69,7 +72,7 @@ type IPv6 []byte const ( // IPv6MinimumSize is the minimum size of a valid IPv6 packet. - IPv6MinimumSize = 40 + IPv6MinimumSize = IPv6FixedHeaderSize // IPv6AddressSize is the size, in bytes, of an IPv6 address. IPv6AddressSize = 16 -- cgit v1.2.3