Thanks Kyriakos Zarifis I think this is you mean http://noxrepo.org/manual/core-api.html -------------------------------------------------------------------------------------------------------------- // only call on TCP packets Packet_expr expr; uint32_t val = ethernet::IP; expr.set_field(Packet_expr::DL_TYPE, &val); val = ip_::proto::TCP; expr.set_field(Packet_expr::NW_PROTO, &val); register_handler_on_match(100, expr, boost::bind(&Example::tcp_packet_handler, this, _1));
---------------------------------------------------------------------------------------------------------------- I got it, but about the nox have pure filter for python? And in pyswitch.py, I print the ' forward_l2_packet() ' -> ' actions ' , I get this " [[0,[0,1]]] " And same to ' forward_l2_packet() ' -> ' packet.type ' , I get this " 2054 " So, what it mean about the information? Thanks a lot. 在 2010年5月3日上午6:41，Kyriakos Zarifis <[email protected]> 寫道： > Hi, > it is mentioned somewhere in the specification that if there are no actions > specified for a flow entry, a matching packet is dropped. > So you would need to describe your flow (set nw_proto, ip_proto, dst_port), > and leave the action set empty. Give that a try.. > > 2010/5/2 曾毓元 <[email protected]> >> >> Thank you Kyriakos Zarifis >> >> About the pyswitch.py information that I try to understand his function >> work. >> And the core.py, there have a lot of function can use. >> But I have no idea about the "actions". In the spec that has this >> structure >> >> >> ------------------------------------------------------------------------------------------------------------------ >> enum ofp_action_type { >> OFPAT_OUTPUT, /* Output to switch port. */ >> OFPAT_SET_VLAN_VID, /* Set the 802.1q VLAN id. */ >> OFPAT_SET_VLAN_PCP, /* Set the 802.1q priority. */ >> OFPAT_STRIP_VLAN, /* Strip the 802.1q header. */ >> OFPAT_SET_DL_SRC, /* Ethernet source address. */ >> OFPAT_SET_DL_DST, /* Ethernet destination address. */ >> OFPAT_SET_NW_SRC, /* IP source address. */ >> OFPAT_SET_NW_DST, /* IP destination address. */ >> OFPAT_SET_NW_TOS, /* IP ToS (DSCP field, 6 bits). */ >> OFPAT_SET_TP_SRC, /* TCP/UDP source port. */ >> OFPAT_SET_TP_DST, /* TCP/UDP destination port. */ >> OFPAT_ENQUEUE, /* Output to queue. */ >> OFPAT_VENDOR = 0xffff >> }; >> >> ------------------------------------------------------------------------------------------------------------------- >> >> If I want to filter TCP or port 22 >> how to do that? >> >> >> >> 2010/4/28 Kyriakos Zarifis <[email protected]>: >> > Hi, >> > >> > in order to see an example of setting up flows programmatically through >> > a >> > NOX component written in python, you can look at >> > /src/nox/coreapps/examples/pyswitch.py >> > The idea is that you need to construct the openflow packet manually, >> > filling >> > out the flow description and the actions, and then send it to the >> > desired >> > switch >> > When you say "add/delete/drop" flows, you actually cover 2 disparate >> > things: >> > add/delete refers to the type of the OF message (add/delete flow entry), >> > but >> > dropping a flow is described in the 'action' part (drop is an action, >> > like >> > 'forward to port 1, or send to controller). These are described in >> > openflow's specification. >> > >> > It's a good idea to use wireshark with the OF dissector plugin, in order >> > to >> > monitor the packet you construct, and also see what the ones send out >> > by, >> > e.g. pyswitch, look like. >> > >> > (the process is the same in a C++ component, just the API differs a bit. >> > Also you can manually setup flows using the 'dpctl' tool, but I'm >> > assuming >> > you were asking how one does it using NOX) >> > >> > On Wed, Apr 28, 2010 at 12:08 AM, 曾毓元 <[email protected]> wrote: >> >> >> >> Dear all: >> >> Sorry to bother you. >> >> I want to try to do the table control, like add/delete/drop flows >> >> But, I don't know how to start it. >> >> >> >> Have any manner can provide? >> >> or sample source code? >> >> >> >> >> >> Regards >> >> Ian >> >> >> >> _______________________________________________ >> >> nox-dev mailing list >> >> [email protected] >> >> http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org >> > >> > > > _______________________________________________ nox-dev mailing list [email protected] http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
