As an experiment, you could start to add "printk"s to the kernel module. That's what I'd do next while debugging the problem.
On Tue, Jan 10, 2012 at 05:10:38PM -0500, Aaron Rosen wrote: > I'm not sure if this helps eliminate anything but I just tried this in > mininet and the same thing occurs there if dl_src/nw_src == > dl_dst/nw_dst . > > Thanks, > > Aaron > > > #packet that goes in > 14:02:47.309736 06:3b:31:b8:d5:a2 (oui Unknown) > ca:05:25:be:fd:70 > (oui Unknown), ethertype IPv4 (0x0800), length 74: 10.0.0.10.39458 > > 10.0.0.11.5004: Flags [S], seq 3794257069, win 5840, options [mss > 1460,sackOK,TS val 47077922 ecr 0,nop,wscale 9], length 0 > > > #flow_mod > cookie=0, duration_sec=50s, duration_nsec=950000000s, table_id=1, > priority=65535, n_packets=1, n_bytes=74, > idle_timeout=100,hard_timeout=0,tcp,in_port=2,dl_vlan=0xffff,dl_vlan_pcp=0x00,dl_src=06:3b:31:b8:d5:a2,dl_dst=ca:05:25:be:fd:70,nw_src=10.0.0.10,nw_dst=10.0.0.11,nw_tos=0x00,tp_src=39458,tp_dst=5004,actions=mod_dl_src:06:3b:31:b8:d5:a2,mod_dl_dst:06:3b:31:b8:d5:a2,mod_nw_src:10.0.0.10,mod_nw_dst:10.0.0.10,mod_tp_dst:9877,IN_PORT > > > #packet is not returned. > > > On Tue, Jan 10, 2012 at 3:02 PM, Aaron Rosen <aro...@clemson.edu> wrote: > > Here are lines (154-158) from here http://codepad.org/APdmOTGN (more debug) > > > > Thanks, > > > > Aaron > > > > Jan 10 14:46:07 localhost ovs-vswitchd: 04385|dpif|DBG|system@dp0: miss > > upcall: > > Jan 10 14:46:07 localhost ovs-vswitchd: > > in_port(0),eth(src=00:1f:29:32:92:4d,dst=00:1b:21:6a:85:88),eth_type(0x0800),ipv4(src=10.0.0.10,dst=10.0.0.13,proto=6,tos=0,ttl=64,frag=no),tcp(src=38710,dst=5004) > > Jan 10 14:46:07 localhost ovs-vswitchd: 00:1f:29:32:92:4d > > > 00:1b:21:6a:85:88, ethertype IPv4 (0x0800), length 74: 10.0.0.10.38710 > > > 10.0.0.13.5004: S 3410511224:3410511224(0) win 14600 <mss > > 1460,sackOK,timestamp 9255759 0,nop,wscale 6> > > Jan 10 14:46:07 localhost ovs-vswitchd: 04386|dpif|DBG|system@dp0: execute > > set(eth(src=00:1f:29:32:92:4d,dst=00:1f:29:32:92:4d)),set(ipv4(src=10.0.0.10,dst=10.0.0.10,proto=6,tos=0,ttl=64,frag=no)),set(tcp(src=38710,dst=9877)),0 > > on packet 00:1f:29:32:92:4d > 00:1b:21:6a:85:88, ethertype IPv4 (0x0800), > > length 74: 10.0.0.10.38710 > 10.0.0.13.5004: S 3410511224:3410511224(0) win > > 14600 <mss 1460,sackOK,timestamp 9255759 0,nop,wscale 6> > > Jan 10 14:46:07 localhost ovs-vswitchd: 04387|dpif|DBG|system@dp0: > > put[create][modify] > > in_port(0),eth(src=00:1f:29:32:92:4d,dst=00:1b:21:6a:85:88),eth_type(0x0800),ipv4(src=10.0.0.10,dst=10.0.0.13,proto=6,tos=0,ttl=64,frag=no),tcp(src=38710,dst=5004), > > actions:set(eth(src=00:1f:29:32:92:4d,dst=00:1f:29:32:92:4d)),set(ipv4(src=10.0.0.10,dst=10.0.0.10,proto=6,tos=0,ttl=64,frag=no)),set(tcp(src=38710,dst=9877)),0 > > > > > > > > On Tue, Jan 10, 2012 at 1:39 PM, Ben Pfaff <b...@nicira.com> wrote: > >> > >> I'd expect such packets to show up in tcpdump in any case. > >> > >> On Tue, Jan 10, 2012 at 01:35:48PM -0500, Aaron Rosen wrote: > >> > I'd be curious what the expected behavior should be if linux sees a > >> > packet > >> > arriving on an interface matching it's dl_src/src_ip. (Since this should > >> > have probably gone through lo ). > >> > > >> > I also enabled log_martians and it's not saying anything about this. > >> > > >> > Thanks, > >> > > >> > Aaron > >> > > >> > On Tue, Jan 10, 2012 at 1:32 PM, Aaron Rosen <aro...@clemson.edu> wrote: > >> > > >> > > These packets are the normal SYN packets to initial a TCP connection. > >> > > > >> > > The weird thing though is if I use this flow_mod it works fine: > >> > > ?(using a > >> > > fake ip/mac as the response). > >> > > > >> > > ?cookie=0x0, duration=6.622s, table=0, n_packets=93776, > >> > > n_bytes=6191149, > >> > > > >> > > idle_timeout=100,priority=65535,tcp,in_port=65534,vlan_tci=0x0000,dl_src=00:1f:29:32:92:4d,dl_dst=00:1b:21:6a:85:88,nw_src=10.0.0.10,nw_dst=10.0.0.13,nw_tos=0,tp_src=53641,tp_dst=5004 > >> > > > >> > > actions=mod_dl_src:66:f3:43:38:f4:a2,mod_dl_dst:00:1f:29:32:92:4d,mod_nw_src:10.0.0.100,mod_nw_dst:10.0.0.10,mod_tp_dst:9877,IN_PORT > >> > > > >> > > > >> > > Then on return packets for that I have this: (so the client is tricked > >> > > in > >> > > to connecting to 10.0.0.100 which is really it's self. Though I don't > >> > > want > >> > > to have to rely on having an extra IP to do this. > >> > > > >> > > ?cookie=0x0, duration=6.622s, table=0, n_packets=143378, > >> > > n_bytes=158529948, > >> > > > >> > > idle_timeout=100,tcp,in_port=65534,dl_src=00:1f:29:32:92:4d,nw_src=10.0.0.10,nw_dst=10.0.0.100,tp_src=9877,tp_dst=53641 > >> > > > >> > > actions=mod_dl_src:00:1b:21:6a:85:88,mod_dl_dst:00:1f:29:32:92:4d,mod_nw_dst:10.0.0.10,mod_nw_src:10.0.0.13,mod_tp_src:5004,IN_PORT > >> > > > >> > > > >> > > > >> > > On Tue, Jan 10, 2012 at 1:21 PM, Ben Pfaff <b...@nicira.com> wrote: > >> > > > >> > >> The datapath actions look like what I'd expect to see. ?I'd expect > >> > >> the > >> > >> modified packets to show up in tcpdump. ?I see that there are only > >> > >> two > >> > >> such packets over an 18-second period. ?Can you send them faster? ?It > >> > >> looks like the second packet didn't get caught by the kernel flow > >> > >> ("used:never") so both packets were actually processed in userspace; > >> > >> perhaps there is a bug in the userspace processing, which is > >> > >> currently > >> > >> in transition. > >> > >> > >> > >> On Tue, Jan 10, 2012 at 01:12:59PM -0500, Aaron Rosen wrote: > >> > >> > pg46 openvswitch # ovs-ofctl dump-flows dp0 > >> > >> > NXST_FLOW reply (xid=0x4): > >> > >> > # Removed other flows here for paste... > >> > >> > ?cookie=0x0, duration=18.467s, table=0, n_packets=2, n_bytes=148, > >> > >> > > >> > >> > >> > >> idle_timeout=100,priority=65535,tcp,in_port=65534,vlan_tci=0x0000,dl_src=00:1f:29:32:92:4d,dl_dst=00:1b:21:6a:85:88,nw_src=10.0.0.10,nw_dst=10.0.0.13,nw_tos=0,tp_src=58209,tp_dst=5004 > >> > >> > > >> > >> > >> > >> actions=mod_dl_src:00:1f:29:32:92:4d,mod_dl_dst:00:1f:29:32:92:4d,mod_nw_src:10.0.0.10,mod_nw_dst:10.0.0.10,mod_tp_dst:9877,IN_PORT > >> > >> > * > >> > >> > * > >> > >> > pg46 openvswitch # ovs-dpctl dump-flows dp0 > >> > >> > > >> > >> > >> > >> in_port(0),eth(src=00:1f:29:32:92:4d,dst=00:1b:21:6a:85:88),eth_type(0x0800),ipv4(src=10.0.0.10,dst=10.0.0.13,proto=6,tos=0,ttl=64,frag=no),tcp(src=58209,dst=5004), > >> > >> > packets:0, bytes:0, used:never, > >> > >> > > >> > >> > >> > >> actions:set(eth(src=00:1f:29:32:92:4d,dst=00:1f:29:32:92:4d)),set(ipv4(src=10.0.0.10,dst=10.0.0.10,proto=6,tos=0,ttl=64,frag=no)),set(tcp(src=58209,dst=9877)),0 > >> > >> > > >> > >> > > >> > >> > pg46 openvswitch # ovs-appctl -t ovs-vswitchd ?ofproto/trace dp0 > >> > >> > > >> > >> > >> > >> 'in_port(0),eth(src=00:1f:29:32:92:4d,dst=00:1b:21:6a:85:88),eth_type(0x0800),ipv4(src=10.0.0.10,dst=10.0.0.13,proto=6,tos=0,ttl=64,frag=no),tcp(src=58209,dst=5004)' > >> > >> > Flow: priority0:tunnel0:in_portfffe:tci(0) > >> > >> > mac00:1f:29:32:92:4d->00:1b:21:6a:85:88 type0800 proto6 tos0 ttl64 > >> > >> > ip10.0.0.10->10.0.0.13 port58209->5004 > >> > >> > Rule: table=0 cookie=0 > >> > >> > > >> > >> > >> > >> priority=65535,tcp,in_port=65534,vlan_tci=0x0000,dl_src=00:1f:29:32:92:4d,dl_dst=00:1b:21:6a:85:88,nw_src=10.0.0.10,nw_dst=10.0.0.13,nw_tos=0,tp_src=58209,tp_dst=5004 > >> > >> > OpenFlow > >> > >> > > >> > >> > >> > >> actions=mod_dl_src:00:1f:29:32:92:4d,mod_dl_dst:00:1f:29:32:92:4d,mod_nw_src:10.0.0.10,mod_nw_dst:10.0.0.10,mod_tp_dst:9877,IN_PORT > >> > >> > > >> > >> > Final flow: priority0:tunnel0:in_portfffe:tci(0) > >> > >> > mac00:1f:29:32:92:4d->00:1f:29:32:92:4d type0800 proto6 tos0 ttl64 > >> > >> > ip10.0.0.10->10.0.0.10 port58209->9877 > >> > >> > Datapath actions: > >> > >> > > >> > >> > >> > >> set(eth(src=00:1f:29:32:92:4d,dst=00:1f:29:32:92:4d)),set(ipv4(src=10.0.0.10,dst=10.0.0.10,proto=6,tos=0,ttl=64,frag=no)),set(tcp(src=58209,dst=9877)),0 > >> > >> > > >> > >> > > >> > >> > On Tue, Jan 10, 2012 at 12:28 PM, Ben Pfaff <b...@nicira.com> wrote: > >> > >> > > On Tue, Jan 10, 2012 at 12:15:39PM -0500, Aaron Rosen wrote: > >> > >> > >> Hello, > >> > >> > >> > >> > >> > >> I have a quick question about what could be happening to these > >> > >> packets. > >> > >> > >> > >> > >> > >> I start a tcp connection 10.0.0.10 > 10.0.0.13: > >> > >> > >> > >> > >> > >> 12:02:55.961344 00:1f:29:32:92:4d (oui Unknown) > > >> > >> > >> 00:1b:21:6a:85:88 > >> > >> > >> (oui Unknown), ethertype IPv4 (0x0800), length 74: > >> > >> > >> 10.0.0.10.50490 > > >> > >> > >> 10.0.0.13.5004: S > >> > >> > >> > >> > >> > >> Then the following flow entry is installed in order to handle > >> > >> > >> this > >> > >> flow: > >> > >> > >> > >> > >> > >> ?cookie=0x0, duration=4.55s, table=0, n_packets=1, n_bytes=74, > >> > >> > >> > >> > >> > > >> > >> > >> > >> idle_timeout=10,priority=65535,tcp,in_port=65534,vlan_tci=0x0000,dl_src=00:1f:29:32:92:4d,dl_dst=00:1b:21:6a:85:88,nw_src=10.0.0.10,nw_dst=10.0.0.13,nw_tos=0,tp_src=50490,tp_dst=5004 > >> > >> > >> > >> > >> > > >> > >> > >> > >> actions=mod_dl_src:00:1f:29:32:92:4d,mod_dl_dst:00:1f:29:32:92:4d,mod_nw_src:10.0.0.10,mod_nw_dst:10.0.0.10,mod_tp_dst:9877,IN_PORT > >> > >> > >> > >> > >> > >> > >> > >> > >> Though, I never see these packets come back in on the interface > >> > >> > >> that > >> > >> > >> it went out on. > >> > >> > > > >> > >> > > What does "ovs-appctl ofproto/trace" or "ovs-dpctl dump-flows" > >> > >> > > show > >> > >> > > happening to the packets? > >> > >> > > >> > >> > > >> > >> > > >> > >> > -- > >> > >> > Aaron O. Rosen > >> > >> > Masters Student - Network Communication > >> > >> > 306B Fluor Daniel > >> > >> > >> > > > >> > > > >> > > > >> > > -- > >> > > Aaron O. Rosen > >> > > Masters Student - Network Communication > >> > > 306B Fluor Daniel > >> > > > >> > > > >> > > > >> > > >> > > >> > -- > >> > Aaron O. Rosen > >> > Masters Student - Network Communication > >> > 306B Fluor Daniel > > > > > > > > > > -- > > Aaron O. Rosen > > Masters Student - Network Communication > > 306B Fluor Daniel > > > > > > > > -- > Aaron O. Rosen > Masters Student - Network Communication > 306B Fluor Daniel _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
