Provides access to fields in an (IPv6) ICMP header.
| Instance Variables | |
| type | icmp.type -> anInteger |
| ICMP message type | |
| code | icmp.code -> anInteger |
| ICMP message code | |
| checksum | icmp.checksum -> anInteger |
| ICMP checksum | |
| data | icmp.data -> aByteArray |
| All the ICMP bytes, i.e. header and payload. Use this if you need to work with some of the ICMP message types that python-libtrace doesn't decode fully | |
| payload | icmp.payload ->anIP6 for types 1, 2, 3 and 4, otherwise aCFFIarray |
| Some ICMP messages carry content from the packet that triggered them; icmp6.payload returns as much as it can of the triggering packet | |
The content of an (IPv6) ICMP header varies depending on its type field. python-libtrace decodes the following types ...
| Echo Request (type 128) and Echo Reply (type 129) | |
| ident | icmp6.echo.ident -> anInteger |
| Echo identifier | |
| sequence | icmp6.echo.sequence -> anInteger |
| Echo sequence number | |
| Packet too big (type 2) | |
| mtu | icmp6.toobig.mtu -> anInteger |
| MTU of link causing problem. Used as part of the Path MTU Discovery process | |
| Parameter problem (type 4) | |
| pointer | icmp6.param.pointer-> anInteger |
| Offset within the invoking packet where an error was detected | |
| Neighbour discovery (types 135-136), Redirect (type 137) | |
| target_prefix | icmp6.neighbour.target_prefix -> anIPprefix |
| IPv6 address of the solicitation's target | |
Nevil Brownlee
Fri, 28 Oct 16 (NZDT)