## Making New Objects

Many of python-libtrace's classes have a new-instance function, so you can create a new object; this is most useful for handling encapsulated packets. These methods take a single argument, which may be an existing object or a byte array. In most cases the argument will be something you have unpacked from an incoming package. This allows you to work on encapsulated packets, e.g.

for pkt in trace:
trans = pkt.transport
if trans.proto != 41: # IPv6 over IPv4
continue
ip6 = ip6.new(trans)
... # Process the encapsulated IPv6 packet

Class Methods
ip() | ip(object or byte array) -> anIP
| Makes a new IP (IPv4) object
ip6() | ip6bject or byte array) -> anIP6
| Makes a new IP6 (IPv6) object
tcp() | tcp(object or byte array) -> aTCP
| Makes a new TCP object
udp() | udp(object or byte array) -> aUDPP
| Makes a new UDP object
icmp() | icmp(object or byte array) -> anICMP
| Makes a new ICMP object
icmp6() | icmp6(object or byte array) -> anICMP
| Makes a new ICMPv6 object

Nevil Brownlee
Mon, 27 Jan 14 (NZDT)