Hi, The logical sum of TCP flags value should work. e.g., flag = tcp.TCP_SYN | tcp.TCP_FIN
- The definitions of TCP flags: https://github.com/osrg/ryu/blob/e3ebed794332ca23a0f67580fd3230612d9d7b07/ryu/lib/packet/tcp.py#L42 Regards, Iwase 2019年12月3日(火) 9:33 Walaa Muhayya <walaa.muha...@gmail.com>: > Hi , > I want to match certain TCP flags such as SYN, FYN in each TCP connection > sent between host and destination. In RYU source code for openFlow13 what > should exactly modify? > Actually, in the switch feature class I do: > > match = parse.OFPMatch(eth_type=2048, eth_type=0x0800, ip_proto=6, > tcp_flags=3) > In Packet-In class I just extract the tcp.tcp packet from the original > data. Then, I print its result to see what its contents are. Thus, I didn`t > find the flags except an ACK flag. > > However, In general, What should I modify in the code to print in the > controller side each SYN and FIN flags for every TCP connection sent > between two hosts? > If you do a simple code example for me will be so appreciated. > > Thank you > _______________________________________________ > Ryu-devel mailing list > Ryu-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/ryu-devel >
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