trafgen: proto: Add ICMPv6 header generation

Support for generating simple ICMPv6 headers using the 'icmp6()/icmpv6()'
trafgen generation function.

Fields supported:

  mtype  Message type (default: 0)
         Supported keywords: echorequest, echoreply
  code   Code (default: 0)
  csum   Message checksum (calculated by default)

Examples:

  { eth(), ipv6(daddr=::1), icmpv6(echorequest), 42, 42, 0, 0  }'

If not explicitely specified, the lower header is initialized as Ethernet.

Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 25 insertions, 0 deletions

diff --git a/trafgen.8 b/trafgen.8
index c81fecb..3075daa 100644
--- a/trafgen.8
+++ b/trafgen.8
@@ -498,6 +498,31 @@ By default, if the lower level header is Ethernet, its EtherType field is set to
 By default, if the lower level header is Ethernet, its EtherType field is set to
 0x86DD (IPv6).
 
+.I ICMPv6
+:
+.B icmp6|icmpv6(mtype=<number>, echorequest, echoreply, code=<number>,
+.B csum=<number>)
+.sp
+.in +4
+.B mtype
+- Message type (default: 0)
+.sp
+.B code
+- Code (default: 0)
+.sp
+.B echorequest
+- ICMPv6 echo (ping) request
+.sp
+.B echoreply
+- ICMPv6 echo (ping) reply
+.sp
+.B csum
+- Message checksum (calculated by default)
+.in -4
+.sp
+By default, if the lower level header is IPv6, its Next Header field is set to
+58 (ICMPv6).
+
 .I UDP
 :
 .B udp(sp=<number>, dp=<number>, len=<number>, csum=<number>)