Andrew,
I have a few follow up questions on the stated behavior.
1. Does the behavior you outlined about hitting special-case "-1" entries
apply to UDP traffic as well if the ACL rule is stateful?
2. What happens when ACL config is modified while traffic is flowing? Would
the packets continue to hit the special-case "-1" session until the session
is timed out and re-claimed? If that's true, then packets would continue to
sneak through even when a user modifies the ACL from Permit+Reflect to
Deny.
3. And regarding the special-case "-1" lookups, I assume a stateful ACL hit
would result in the creation of such a session and subsequent packets would
by-pass ACL rules and continue to be served by special-case "-1".
thanks
Venkat
On Tue, Sep 15, 2020 at 2:01 AM Andrew 👽 Yourtchenko <ayour...@gmail.com>
wrote:
> Hi Venkat,
>
> Before doing ACL checks, acl-plugin checks the establshed sessions on
> the given interface.
>
> If an already established session is hit the action is set to "3" and
> no further ACL check is done, which is what you see in your output.
>
> For that case, the ACL# in the trace is a special-case "-1", same as
> lc_index-1 - because we actually never get it to ACL lookup so do not
> need it; and the rule# is the session index; and the trace_bits tells
> us that this session is classifed to use timeout type "3", which is
> defined in acl_timeout_e as "ACL_TIMEOUT_TCP_TRANSIENT" - which makes
> sense, since you are sending the packets in one direction and thus the
> session never establishes and the timeout type never changes to
> "TCP_IDLE".
>
> Of the packets you sent in total, 15002 packets had hit the ACL#3
> rule and caused the sessions to be created. The rest of the packets
> had hit the established session entries and this is one of those that
> you have captured.
>
> At the time of taking the outputs the traffic was stopped and the
> sessions were deleted by idle timeout (which for the transient state
> is short).
>
> Does this make sense ?
>
> --a
>
>
>
>
> On 9/14/20, Venkat <venkat.dabb...@gmail.com> wrote:
> > Hello Andrew,
> >
> > I am doing a simple test by sending TCP flows from Trex traffic
> generator.
> > Traffic source is 16.0.0.1-16.0.0.100 and destination is
> > 48.0.0.1-48.0.0.100.
> > I am sending TCP traffic with CPS=50 from 100 clients to 100 servers via
> > Trex http profile.
> >
> > I have a reflective ACL to permit the flow for the above src and dst.
> > I expect the packet to hit acl index 3 rule 0 and get permitted.
> > However, I see the following match in the packet trace which doesn't seem
> > like it is hitting acl index 3 and rule 0 but hitting some other acl
> index
> > (acl -1 and lc_index -1).
> > What is the behavior here? Please provide some context here..
> >
> > 03:47:03:874624: acl-plugin-in-ip4-fa
> >
> > acl-plugin: lc_index: -1, sw_if_index 1, next index 1, action: 3, match:
> acl
> > -1 rule 13309 trace_bits 80010303
> >
> > pkt info 0000000000000000 0000000000000000 0000000000000000
> 4300003043000010
> > 0001010600502d14 0310ffff00000000
> >
> > lc_index 0 l3 ip4 16.0.0.67 -> 48.0.0.67 l4 lsb_of_sw_if_index 1 proto 6
> > l4_is_input 1 l4_slow_path 0 l4_flags 0x01 port 11540 -> 80 tcp flags
> > (valid) 10 rsvd 0
> >
> > DBGvpp# show acl-plugin acl
> >
> > acl-index 0 count 2 tag
> > {99998-sra-inbound-sasefwpro-nags-explicit-deny-99998}
> >
> > 0: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 0 sport 0 dport 0
> >
> > 1: ipv6 deny src ::/0 dst ::/0 proto 0 sport 0 dport 0
> >
> > applied inbound on sw_if_index: 1
> >
> > applied outbound on sw_if_index:
> >
> > used in lookup context index: 1
> >
> > acl-index 1 count 6 tag
> > {99999-sra-inbound-sasefwpro-sase-default-fw-profile}
> >
> > 0: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 6 sport 0-65535
> > dport 0-65535
> >
> > 1: ipv6 permit+reflect src ::/0 dst ::/0 proto 6 sport 0-65535 dport
> > 0-65535
> >
> > 2: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 17 sport
> 0-65535
> > dport 0-65535
> >
> > 3: ipv6 permit+reflect src ::/0 dst ::/0 proto 17 sport 0-65535 dport
> > 0-65535
> >
> > 4: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535
> > dport 0-65535
> >
> > 5: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535
> > dport 0-65535
> >
> > applied inbound on sw_if_index: 1
> >
> > applied outbound on sw_if_index:
> >
> > used in lookup context index: 1
> >
> > acl-index 2 count 6 tag
> > {99999-sra-outbound-sasefwpro-sase-default-fw-profile}
> >
> > 0: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 6 sport 0-65535 dport
> > 0-65535
> >
> > 1: ipv6 deny src ::/0 dst ::/0 proto 6 sport 0-65535 dport 0-65535
> >
> > 2: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 17 sport 0-65535 dport
> > 0-65535
> >
> > 3: ipv6 deny src ::/0 dst ::/0 proto 17 sport 0-65535 dport 0-65535
> >
> > 4: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 dport
> > 0-65535
> >
> > 5: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 dport
> > 0-65535
> >
> > applied inbound on sw_if_index:
> >
> > applied outbound on sw_if_index: 1
> >
> > used in lookup context index: 0
> >
> > acl-index 3 count 1 tag {100-allow-48}
> >
> > 0: ipv4 permit+reflect src 16.0.0.0/16 dst 48.0.0.0/16 proto 0 sport 0
> dport
> > 0
> >
> > applied inbound on sw_if_index: 1
> >
> > used in lookup context index: 1
> >
> > DBGvpp#
> >
> > DBGvpp# show acl-plugin tables
> >
> > Stats counters enabled for interface ACLs: 0
> >
> > Mask-type entries:
> >
> > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000 0800ffffffffffff refcount 4
> >
> > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 000000ff00000000 0e00ffffffffffff refcount 24
> >
> > 2: 0000000000000000 0000000000000000 0000000000000000 0000ffff0000ffff
> > 0000000000000000 0800ffffffffffff refcount 2
> >
> > Mask-ready ACL representations
> >
> > acl-index 0 bitmask-ready layout
> >
> > applied lc_index list: 1
> >
> > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000 0000000000000000 base mask index 0 acl 0 rule 0 action 0
> >
> > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000 0800000000000000 base mask index 0 acl 0 rule 1 action 0
> >
> > acl-index 1 bitmask-ready layout
> >
> > applied lc_index list: 1
> >
> > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000600000000 0200000100000000 base mask index 1 acl 1 rule 0 action 2
> >
> > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000600000000 0a00000100000000 base mask index 1 acl 1 rule 1 action 2
> >
> > 2: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000001100000000 0200000100000000 base mask index 1 acl 1 rule 2 action 2
> >
> > 3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000001100000000 0a00000100000000 base mask index 1 acl 1 rule 3 action 2
> >
> > 4: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000100000000 0200000100000000 base mask index 1 acl 1 rule 4 action 2
> >
> > 5: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000100000000 0200000100000000 base mask index 1 acl 1 rule 5 action 2
> >
> > acl-index 2 bitmask-ready layout
> >
> > applied lc_index list: 0
> >
> > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000600000000 0200000100000000 base mask index 1 acl 2 rule 0 action 0
> >
> > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000600000000 0a00000100000000 base mask index 1 acl 2 rule 1 action 0
> >
> > 2: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000001100000000 0200000100000000 base mask index 1 acl 2 rule 2 action 0
> >
> > 3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000001100000000 0a00000100000000 base mask index 1 acl 2 rule 3 action 0
> >
> > 4: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000100000000 0200000100000000 base mask index 1 acl 2 rule 4 action 0
> >
> > 5: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> > 0000000100000000 0200000100000000 base mask index 1 acl 2 rule 5 action 0
> >
> > acl-index 3 bitmask-ready layout
> >
> > applied lc_index list: 1
> >
> > 0: 0000000000000000 0000000000000000 0000000000000000 0000003000000010
> > 0000000000000000 0000000200000000 base mask index 2 acl 3 rule 0 action 2
> >
> > Applied lookup entries for lookup contexts
> >
> > lc_index 0:
> >
> > applied acls: 2
> >
> > applied mask info entries:
> >
> > 0: mask type index 1 first rule index 0 num_entries 6 max_collisions 2
> >
> > lookup applied entries:
> >
> > 0: acl 2 rule 0 action 0 bitmask-ready rule 0 mask type index: 1
> > colliding_rules: 1 collision_head_ae_idx 0 hitcount 0 acl_pos: 0
> >
> > 0: acl 2 ace 0 acl pos 0 pae index: 0
> >
> > 1: acl 2 rule 1 action 0 bitmask-ready rule 1 mask type index: 1
> > colliding_rules: 1 collision_head_ae_idx 1 hitcount 0 acl_pos: 0
> >
> > 0: acl 2 ace 1 acl pos 0 pae index: 1
> >
> > 2: acl 2 rule 2 action 0 bitmask-ready rule 2 mask type index: 1
> > colliding_rules: 1 collision_head_ae_idx 2 hitcount 0 acl_pos: 0
> >
> > 0: acl 2 ace 2 acl pos 0 pae index: 2
> >
> > 3: acl 2 rule 3 action 0 bitmask-ready rule 3 mask type index: 1
> > colliding_rules: 1 collision_head_ae_idx 3 hitcount 0 acl_pos: 0
> >
> > 0: acl 2 ace 3 acl pos 0 pae index: 3
> >
> > 4: acl 2 rule 4 action 0 bitmask-ready rule 4 mask type index: 1
> > colliding_rules: 2 collision_head_ae_idx 4 hitcount 0 acl_pos: 0
> >
> > 0: acl 2 ace 4 acl pos 0 pae index: 4
> >
> > 1: acl 2 ace 5 acl pos 0 pae index: 5
> >
> > 5: acl 2 rule 5 action 0 bitmask-ready rule 5 mask type index: 1
> > colliding_rules: 0 collision_head_ae_idx 4 hitcount 0 acl_pos: 0
> >
> > lc_index 1:
> >
> > applied acls: 3, 0, 1
> >
> > applied mask info entries:
> >
> > 0: mask type index 2 first rule index 0 num_entries 1 max_collisions 1
> >
> > 1: mask type index 0 first rule index 1 num_entries 2 max_collisions 1
> >
> > 2: mask type index 1 first rule index 3 num_entries 6 max_collisions 2
> >
> > lookup applied entries:
> >
> > 0: acl 3 rule 0 action 2 bitmask-ready rule 0 mask type index: 2
> > colliding_rules: 1 collision_head_ae_idx 0 hitcount 150001 acl_pos: 0
> >
> > 0: acl 3 ace 0 acl pos 0 pae index: 0
> >
> > 1: acl 0 rule 0 action 0 bitmask-ready rule 0 mask type index: 0
> > colliding_rules: 1 collision_head_ae_idx 1 hitcount 0 acl_pos: 1
> >
> > 0: acl 0 ace 0 acl pos 1 pae index: 1
> >
> > 2: acl 0 rule 1 action 0 bitmask-ready rule 1 mask type index: 0
> > colliding_rules: 1 collision_head_ae_idx 2 hitcount 0 acl_pos: 1
> >
> > 0: acl 0 ace 1 acl pos 1 pae index: 2
> >
> > 3: acl 1 rule 0 action 2 bitmask-ready rule 0 mask type index: 1
> > colliding_rules: 1 collision_head_ae_idx 3 hitcount 0 acl_pos: 2
> >
> > 0: acl 1 ace 0 acl pos 2 pae index: 3
> >
> > 4: acl 1 rule 1 action 2 bitmask-ready rule 1 mask type index: 1
> > colliding_rules: 1 collision_head_ae_idx 4 hitcount 0 acl_pos: 2
> >
> > 0: acl 1 ace 1 acl pos 2 pae index: 4
> >
> > 5: acl 1 rule 2 action 2 bitmask-ready rule 2 mask type index: 1
> > colliding_rules: 1 collision_head_ae_idx 5 hitcount 0 acl_pos: 2
> >
> > 0: acl 1 ace 2 acl pos 2 pae index: 5
> >
> > 6: acl 1 rule 3 action 2 bitmask-ready rule 3 mask type index: 1
> > colliding_rules: 1 collision_head_ae_idx 6 hitcount 0 acl_pos: 2
> >
> > 0: acl 1 ace 3 acl pos 2 pae index: 6
> >
> > 7: acl 1 rule 4 action 2 bitmask-ready rule 4 mask type index: 1
> > colliding_rules: 2 collision_head_ae_idx 7 hitcount 0 acl_pos: 2
> >
> > 0: acl 1 ace 4 acl pos 2 pae index: 7
> >
> > 1: acl 1 ace 5 acl pos 2 pae index: 8
> >
> > 8: acl 1 rule 5 action 2 bitmask-ready rule 5 mask type index: 1
> > colliding_rules: 0 collision_head_ae_idx 7 hitcount 0 acl_pos: 2
> >
> > ACL lookup hash table:
> >
> > Hash table ACL plugin rule lookup bihash
> >
> > 13 active elements 13 active buckets
> >
> > 1 free lists
> >
> > 0 linear search buckets
> >
> > arena: base 7f7377ff0000, next 80d00
> >
> > used 527616 b (0 Mbytes) of 67108864 b (64 Mbytes)
> >
> > DBGvpp# show acl-plugin sessions
> >
> > Sessions total: add 150002 - del 150002 = 0
> >
> > Sessions active: add 150002 - deact 150002 = 0
> >
> > Sessions being purged: deact 150002 - del 150002 = 0
> >
> > now: 38259162493998 clocks per second: 2500000000
> >
> > Per-thread data:
> >
> > Thread #0:
> >
> > connection add/del stats:
> >
> > sw_if_index 0: add 0 - del 0 = 0; epoch chg: 0
> >
> > sw_if_index 1: add 150002 - del 150002 = 0; epoch chg: 0
> >
> > sw_if_index 2: add 0 - del 0 = 0; epoch chg: 0
> >
> > sw_if_index 3: add 0 - del 0 = 0; epoch chg: 0
> >
> > sw_if_index 4: add 0 - del 0 = 0; epoch chg: 0
> >
> > sw_if_index 5: add 0 - del 0 = 0; epoch chg: 0
> >
> > sw_if_index 6: add 0 - del 0 = 0; epoch chg: 0
> >
> > sw_if_index 7: add 0 - del 0 = 0; epoch chg: 0
> >
> > sw_if_index 8: add 0 - del 0 = 0; epoch chg: 0
> >
> > sw_if_index 9: add 0 - del 0 = 0; epoch chg: 0
> >
> > connection timeout type lists:
> >
> > fa_conn_list_head[0]: -1
> >
> > fa_conn_list_head[1]: -1
> >
> > fa_conn_list_head[2]: -1
> >
> > fa_conn_list_head[3]: -1
> >
> > fa_conn_list_head[4]: -1
> >
> > Next expiry time: 0
> >
> > Requeue until time: 0
> >
> > Current time wait interval: 0
> >
> > Count of deleted sessions: 150002
> >
> > Delete already deleted: 0
> >
> > Session timers restarted: 150750
> >
> > Swipe until this time: 0
> >
> > sw_if_index serviced bitmap: 2
> >
> > pending clear intfc bitmap :
> >
> > clear in progress: 0
> >
> > interrupt is pending: 0
> >
> > interrupt is needed: 0
> >
> > interrupt is unwanted: 0
> >
> > interrupt generation: 14572
> >
> > received session change requests: 0
> >
> > sent session change requests: 0
> >
> > Conn cleaner thread counters:
> >
> > 33: delete_by_sw_index events
> >
> > 30: delete_by_sw_index handled ok
> >
> > 0: unknown events received
> >
> > 0: session idle timers restarted
> >
> > 14567: event wait with timeout called
> >
> > 5: event wait w/o timeout called
> >
> > 14571: total event cycles
> >
> > Interrupt generation: 14572
> >
> > Sessions per interval: min 1 max 100 increment: 100 ms current: 500 ms
> >
> > Reclassify sessions: 0
> >
> > IPv6 Session lookup hash table:
> >
> > Hash table ACL plugin FA IPv6 session bihash
> >
> > [empty, uninitialized]
> >
> > IPv4 Session lookup hash table:
> >
> > Hash table ACL plugin FA IPv4 session bihash
> >
> > 0 active elements 0 active buckets
> >
> > 5 free lists
> >
> > [len 1] 51199 free elts
> >
> > [len 2] 4504 free elts
> >
> > [len 4] 373 free elts
> >
> > [len 8] 9 free elts
> >
> > [len 16] 1 free elts
> >
> > 0 linear search buckets
> >
> > arena: base 7f5abb720000, next 7b84c0
> >
> > used 8094912 b (7 Mbytes) of 1073741824 b (1024 Mbytes)
> >
> > DBGvpp# show nat44 addresses
> >
> > NAT44 pool addresses:
> >
> > 172.24.114.39
> >
> > tenant VRF independent
> >
> > 0 busy udp ports
> >
> > 15001 busy tcp ports
> >
> > 0 busy icmp ports
> >
> > NAT44 twice-nat pool addresses:
> >
> > 10.40.1.254
> >
> > tenant VRF independent
> >
> > 0 busy udp ports
> >
> > 0 busy tcp ports
> >
> > 0 busy icmp ports
> >
> > DBGvpp#
> >
> > Packet 50
> >
> > 03:47:03:874592: dpdk-input
> >
> > lan-ens6 rx queue 0
> >
> > buffer 0x8b222: current data 0, length 54, buffer-pool 0, ref-count 1,
> > totlen-nifb 0, trace handle 0x31
> >
> > ext-hdr-valid
> >
> > l4-cksum-computed l4-cksum-correct
> >
> > PKT MBUF: port 0, nb_segs 1, pkt_len 54
> >
> > buf_len 2176, data_len 54, ol_flags 0x0, data_off 128, phys_addr
> 0x6fec8900
> >
> > packet_type 0x110 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
> >
> > rss 0x3aa73aa7 fdir.hi 0x0 fdir.lo 0x3aa73aa7
> >
> > Packet Types
> >
> > RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers
> >
> > RTE_PTYPE_L4_TCP (0x0100) TCP packet
> >
> > IP4: 02:85:36:20:e4:87 -> 02:2e:53:e6:4f:e1
> >
> > TCP: 16.0.0.67 -> 48.0.0.67
> >
> > tos 0x00, ttl 128, length 40, checksum 0x80f9
> >
> > fragment id 0x7951
> >
> > TCP: 11540 -> 80
> >
> > seq. 0x181a45db ack 0x181af226
> >
> > flags 0x10 ACK, tcp header: 20 bytes
> >
> > window 32768, checksum 0x59b4
> >
> > 03:47:03:874606: ethernet-input
> >
> > frame: flags 0x3, hw-if-index 1, sw-if-index 1
> >
> > IP4: 02:85:36:20:e4:87 -> 02:2e:53:e6:4f:e1
> >
> > 03:47:03:874620: ip4-input-no-checksum
> >
> > TCP: 16.0.0.67 -> 48.0.0.67
> >
> > tos 0x00, ttl 128, length 40, checksum 0x80f9
> >
> > fragment id 0x7951
> >
> > TCP: 11540 -> 80
> >
> > seq. 0x181a45db ack 0x181af226
> >
> > flags 0x10 ACK, tcp header: 20 bytes
> >
> > window 32768, checksum 0x59b4
> >
> > 03:47:03:874624: acl-plugin-in-ip4-fa
> >
> > acl-plugin: lc_index: -1, sw_if_index 1, next index 1, action: 3, match:
> acl
> > -1 rule 13309 trace_bits 80010303
> >
> > pkt info 0000000000000000 0000000000000000 0000000000000000
> 4300003043000010
> > 0001010600502d14 0310ffff00000000
> >
> > lc_index 0 l3 ip4 16.0.0.67 -> 48.0.0.67 l4 lsb_of_sw_if_index 1 proto 6
> > l4_is_input 1 l4_slow_path 0 l4_flags 0x01 port 11540 -> 80 tcp flags
> > (valid) 10 rsvd 0
> >
> > 03:47:03:874634: ip4-lookup
> >
> > fib 0 dpo-idx 53 flow hash: 0x00000000
> >
> > TCP: 16.0.0.67 -> 48.0.0.67
> >
> > tos 0x00, ttl 128, length 40, checksum 0x80f9
> >
> > fragment id 0x7951
> >
> > TCP: 11540 -> 80
> >
> > seq. 0x181a45db ack 0x181af226
> >
> > flags 0x10 ACK, tcp header: 20 bytes
> >
> > window 32768, checksum 0x59b4
> >
> > 03:47:03:874639: ip4-load-balance
> >
> > fib 0 dpo-idx 14 flow hash: 0x00000000
> >
> > TCP: 16.0.0.67 -> 48.0.0.67
> >
> > tos 0x00, ttl 128, length 40, checksum 0x80f9
> >
> > fragment id 0x7951
> >
> > TCP: 11540 -> 80
> >
> > seq. 0x181a45db ack 0x181af226
> >
> > flags 0x10 ACK, tcp header: 20 bytes
> >
> > window 32768, checksum 0x59b4
> >
> > 03:47:03:874655: ip4-rewrite
> >
> > tx_sw_if_index 2 dpo-idx 14 : ipv4 via 172.24.115.166 wan-ens7: mtu:9000
> > 02fcbaad303302c6e54357a50800 flow hash: 0x00000000
> >
> > 00000000:
> 02fcbaad303302c6e54357a5080045000028795100007f0681f9100000433000
> >
> > 00000020: 00432d140050181a45db181af2265010800059b400002a2a2a2a2a2a
> >
> > 03:47:03:874660: nat44-ed-in2out-output
> >
> > NAT44_IN2OUT_ED_FAST_PATH: sw_if_index 1, next index 0, session 34066
> >
> > 03:47:03:874681: wan-ens7-output
> >
> > wan-ens7 l4-cksum-computed l4-cksum-correct natted l2_hdr_offset_valid
> > l3_hdr_offset_valid
> >
> > IP4: 02:c6:e5:43:57:a5 -> 02:fc:ba:ad:30:33
> >
> > TCP: 172.24.114.39 -> 48.0.0.67
> >
> > tos 0x00, ttl 127, length 40, checksum 0x73fc
> >
> > fragment id 0x7951
> >
> > TCP: 8447 -> 80
> >
> > seq. 0x181a45db ack 0x181af226
> >
> > flags 0x10 ACK, tcp header: 20 bytes
> >
> > window 32768, checksum 0x57cc
> >
> > 03:47:03:874685: wan-ens7-tx
> >
> > wan-ens7 tx queue 0
> >
> > buffer 0x8b222: current data 0, length 54, buffer-pool 0, ref-count 1,
> > totlen-nifb 0, trace handle 0x31
> >
> > ext-hdr-valid
> >
> > l4-cksum-computed l4-cksum-correct natted l2-hdr-offset 0 l3-hdr-offset
> 14
> >
> > PKT MBUF: port 0, nb_segs 1, pkt_len 54
> >
> > buf_len 2176, data_len 54, ol_flags 0x0, data_off 128, phys_addr
> 0x6fec8900
> >
> > packet_type 0x110 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
> >
> > rss 0x3aa73aa7 fdir.hi 0x0 fdir.lo 0x3aa73aa7
> >
> > Packet Types
> >
> > RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers
> >
> > RTE_PTYPE_L4_TCP (0x0100) TCP packet
> >
> > IP4: 02:c6:e5:43:57:a5 -> 02:fc:ba:ad:30:33
> >
> > TCP: 172.24.114.39 -> 48.0.0.67
> >
> > tos 0x00, ttl 127, length 40, checksum 0x73fc
> >
> > fragment id 0x7951
> >
> > TCP: 8447 -> 80
> >
> > seq. 0x181a45db ack 0x181af226
> >
> > flags 0x10 ACK, tcp header: 20 bytes
> >
> > window 32768, checksum 0x57cc
> >
>
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