Hi Marcelo, There is a "wildcards" field on struct ofp_match. You should take care the "wildcards" field if you intend to ignore some fields. If no wildcards are set, it means exact match over the entire 11-tuple(10-tuple/12-tuple). Hope it helps
Regards, MinChi -----Original Message----- From: nox-dev-boun...@noxrepo.org [mailto:nox-dev-boun...@noxrepo.org] On Behalf Of Marcelo Ribeiro Nascimento Sent: Monday, April 26, 2010 10:44 PM To: nox-dev@noxrepo.org Subject: [nox-dev] Installing flows by NOX Hi all, I have recently started working with NOX development and I am facing problems installing flows by NOX into switch table. I would like to install a flow to forward UDP packets with a specific IP destination address (i.e. 192.168.0.1) to controller. My problem is: I don't care about the others fields (vlanid, port_in, dl_src, dl_dst and so on), so how should I fill the struct ofp_match? My code is bellow: ofp_flow_mod* ofm; size_t size = sizeof *ofm + sizeof(ofp_action_output); boost::shared_array<char> raw_of(new char[size]); ofm = (ofp_flow_mod*) raw_of.get(); ofm->header.version = OFP_VERSION; ofm->header.type = OFPT_FLOW_MOD; ofm->header.length = htons(size); ofm->header.xid = 0; std::memset(&(ofm->match), 0, sizeof(struct ofp_match)); ofm->match.dl_type = ethernet::IP; /* IP Protocol*/ ofm->match.nw_proto = 0x11; /* UDP IP Protocol*/ ofm->match.nw_dst = inet_addr("192.168.0.1"); /* Dest. IP Addr */ ofm->cookie = htonl(0); ofm->out_port = OFPP_NONE; ofm->command = htons(OFPFC_ADD); ofm->buffer_id = htonl(UINT32_MAX); ofm->idle_timeout = htons(OFP_FLOW_PERMANENT); ofm->hard_timeout = htons(OFP_FLOW_PERMANENT); ofm->priority = htons(OFP_DEFAULT_PRIORITY); ofm->flags = htons(ofd_flow_mod_flags()); ofp_action_output& action = *((ofp_action_output*) ofm->actions); memset(&action, 0, sizeof(ofp_action_output)); action.type = htons(OFPAT_OUTPUT); action.len = htons(sizeof(ofp_action_output)); action.port = htons(OFPP_CONTROLLER); action.max_len = htons(ETH_DATA_LEN); /*Send up to 1500 bytes*/ send_openflow_command(dj.datapath_id, &ofm->header, true); This code doesn't work. That packets are forwarded to controller but with reason OFPR_NO_MATCH. NOX message: 00637|my_program|INFO:handle_packet_in: A packet has been received (port: 1, reason: 0, len=200, buf_size=128) The output of "dpctl dump-flows" command: #./dpctl dump-flows unix:/var/run/sp0.sock stats_reply (xid=0xd14d1b1c): flags=none type=1(flow) cookie=0, duration_sec=4s, duration_nsec=857000000s, table_id=0, priority=65535, n_packets=0, n_bytes=0, idle_timeout=0, hard_timout=0, udp, in_port=0, dl_vlan=0, dl_vlan_pcp=0, dl_src=00:00:00:00:00:00, dl_dst=00:00:00:00:00:00,nw_src=0.0.0.0, nw_dst=192.168.0.1, nw_tos=0x00, tp_src=0, tp_dst=0, actions=CONTROLLER:1500 I think the problem is the fields filled with ZERO. When I set the flow by dpctl, it seems to work! But in this case I don't know how to specify max_len and ZERO bytes are sent to controller. #./dpctl add-flow unix:/var/run/dp0.sock dl_type=0x0800,nw_proto=0x11,nw_dst=192.168.0.1,actions=CONTROLLER #./dpctl dump-flows unix:/var/run/sp0.sock stats_reply (xid=0x96173c8e): flags=none type=1(flow) cookie=0, duration_src=2s, durations_nsec=800000000s, table_id=1, priority=32768, n_packets=0, n_bytes=0, idle_timoue=60, hard_timout=0, upd, nw_dst=192.168.0.1, actions=CONTROLLER:all Unlike the flow installed by NOX, here I have the fields that were specified only. NOX messages: 00463|my_program|INFO:handle_packet_in: A packet has been received (port: 1, reason: 1, len=200, buf_size=0) 00464|flow|ERR:Packet length 0 less than minimum Ethernet packet 14: port0100:vlanffff:pcp:0 mac00:00:00:00:00:00->00:00:00:00:00:00 proto0000 ip0.0.0.0->0.0.0.0 port0->0 I would be very grateful for any help! Best Regards, Marcelo _______________________________________________ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org _______________________________________________ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
