Hi all, I have some questions about parsing a packet.
Logically, when a packet comes into the controller, first, the ethernet header needs to be parsed, if it can’t be deliverd in L2, then parse the IP header, and then, TCP/UDP/ICMP header. Right? 0.from nox.lib.packet.ethernet import *ethernet* from nox.lib.packet.ipv4 import *ipv4* from nox.lib.packet.icmp import *icmp* In packet_in_callback function, 1. if packet.parsed == True learn_and_forward_l2_packet (if failed, move to step 2) 2. if packet.type == ethernet.IP_TYPE parse the IP header (How to call the “parse” method in ipv4 class?) learn_and_forward_l3_packet Questions: 1. When a packet coming into the controller, by default, it would be parsed by *ethernet *first? 2. Could you give an example how to parse a packet header by *ipv4*? Correct me if anything wrong above. Thank you very much. Looking forward to your reply. Weiyun
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