Provides access to fields in an (IPv4) 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 ->anIP for types 3, 4, 5, 11 and 12, otherwise aByteArray |
| Most ICMP messages carry some content from the packet that triggered them; icmp.payload returns as much as it can of the triggering packet | |
The content of an (IPv4) ICMP header varies depending on its type field. python-libtrace decodes the following types ...
| Echo Request (type 8) and Echo Reply (type 0) | |
| ident | icmp.echo.ident -> anInteger |
| Echo identifier | |
| sequence | icmp.echo.sequence -> anInteger |
| Echo sequence number | |
| Redirect (type 5) | |
| gateway | icmp.redirect.gateway -> anIPprefix |
| Returns IPv4 address of the gateway | |
Nevil Brownlee
Sat, 22 Oct 16 (NZDT)