On 2014年11月19日 21:20, Salaheddine ZERKANE wrote: > Hello, > > I am a phd student working in SDN security and new in RYU, Could you please > help me to find out if it is possible to create rules in RYUusing matching on > TCP Flags such as : RST, FIN, SYNAck, etc. and if RYUsupports a parsing of > packet-in by thesetcpflags? If it is the case how please?
> RST, FIN, SYNAck, etc. and if RYUsupports a parsing of packet-in by > thesetcpflags? Is possible. Ryu can generate a corresponding python object from a sequence of bytes of the packet. The following URL has describes how to use. http://osrg.github.io/ryu-book/en/html/packet_lib.html#analysis-of-packet-parse Of course, this feature also supports tcp. http://ryu.readthedocs.org/en/latest/library_packet_ref.html#ryu.lib.packet.tcp.tcp And I wrote a simple sample code. Please try the following. sample.py ----------------------------------------------------------- from ryu.lib.packet.packet import Packet from ryu.lib.packet import ethernet from ryu.lib.packet import tcp from ryu.lib.packet import ipv4 from ryu.lib.packet import packet_utils # Generation of Packets (Serialization) pkt = Packet() pkt.add_protocol(ethernet.ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2048)) pkt.add_protocol(ipv4.ipv4(tos=32, proto=6, src='192.168.10.10', dst='192.168.20.20', ttl=64)) pkt.add_protocol(tcp.tcp(dst_port=2222, bits=0b001100, option=str('\\x00' * 4), src_port=11111)) pkt.add_protocol('\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\t\\n\\x0b\\x0c\\r\\x0e\\x0f\\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17\\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f') pkt.serialize() bin_packet = pkt.data # Analysis of Packet (Parse) pkt = Packet(data=bin_packet) pkt_tcp = pkt.get_protocol(tcp.tcp) print pkt_tcp # show TCP Flags (6bits) print pkt_tcp.bits ----------------------------------------------------------- xxx@xxx:xxx/ryu/ $ python sample.py tcp(ack=0,bits=12,csum=57105,dst_port=2222,offset=9,option=bytearray(b'\\x00\\x00\\x00\\x00'),seq=0,src_port=11111,urgent=0,window_size=0) 12 thanks > > Thanks and regards, > > > > *Meilleures salutations,* > > *Salaheddine ZERKANE* > > > > {P} > > > > Doctorant > Cubiq > > {T} > > > > +33 (0) 2 56 35 82 11 > > > > http://signature.b-com.com/logo-bleu.gif <http://www.b-com.com/> > > > > ZAC DES CHAMPS BLANCS > BÂT. A · 13 RUE CLAUDE CHAPPE > 35510 CESSON-SÉVIGNÉ (FRance) > > > > > > > > > > > > ------------------------------------------------------------------------------ > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > from Actuate! Instantly Supercharge Your Business Reports and Dashboards > with Interactivity, Sharing, Native Excel Exports, App Integration & more > Get technology previously reserved for billion-dollar corporations, FREE > http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk > > > > _______________________________________________ > Ryu-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ryu-devel > ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Ryu-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ryu-devel
