Provides access to fields in an IPv4 header. Further, you can see any following IP Options by using pkt.Layer3; see the Layers Decode page.
| Instance Variables | |
| version | ip.version -> anInteger |
| IP Version, 4 for IPv4 | |
| hdr_len | ip.hdr_len -> anInteger |
| IP Header Length, in 4-byte units | |
| traffic_class | ip.traffic_class -> anInteger |
| Originally IPv4 Type-Of-Service, now used for DSCP and ECN. (Traffic Class is its IPv6 name) | |
| pkt_len | ip.pkt_len -> anInteger |
| Total Length of IP packet | |
| ident | ip.iden t-> anInteger |
| IP Identification | |
| rf? | ip.rf? -> true or false |
| True if 'Reserved' IP flag is 1 | |
| df? | ip.df? -> true or false |
| True if 'Don't Fragment' IP flag is 1 | |
| mf? | ip.mf? -> true or false |
| True if 'More Fragments' IP flag is 1 | |
| frag_offset | ip.frag_offset -> anInteger |
| Fragment Offset, in 8-byte units | |
| ttl | ip.ttl -> anInteger |
| IP Time to Live (TTL) | |
| proto | ip.proto -> anInteger |
| IP Protocol, e.g. 6 = TCP, 17 = UDP, 1 = ICMP | |
| hdr_checksum | ip.hdr_checksum -> anInteger |
| IP Header Checksum | |
| src_prefix | ip.src_prefix -> anIPprefix |
| IPv4 source address | |
| dst_prefix | ip.dst_prefix -> anIPprefix |
| IPv4 destination address | |
| Class set Methods | |
| traffic_class= | ip.traffic_class = anInteger |
| Sets the traffic_class value in an IP | |
| ttl= | ip.ttl = anInteger |
| Sets the Time to Live (TTL) in an IP | |
| src_prefix= | ip.src_prefix = anIPprefix |
| Sets the IPv4 source address in an IP | |
| dst_prefix= | ip.dst_prefix = anIPprefix |
| Sets the IPv4 destination address in an IP | |
Nevil Brownlee
Thu, 20 Nov 08 (CST)