net/packet: generate ICMP destination unreachable packets

Updates tailscale/corp#34257 Signed-off-by: Fran Bull <fran@tailscale.com>
2026-07-20 07:33:00 -07:00
parent f65372c9ba
commit 8df4816be4
4 changed files with 261 additions and 0 deletions
@@ -52,6 +52,11 @@ type ICMP6Code uint8

 const (
 	ICMP6NoCode ICMP6Code = 0
+
+	// ICMP6AddressUnreachable is the code used with ICMP6Unreachable to
+	// indicate that the destination address could not be reached. It is
+	// the IPv6 equivalent of ICMP4HostUnreachable.
+	ICMP6AddressUnreachable ICMP6Code = 3
 )

 // ICMP6Header is an IPv4+ICMPv4 header.