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| author |   John Rutherford <john.rutherford@dektech.com.au> | 2019-08-07 12:52:29 +1000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-08-08 22:11:39 -0700 |
| commit | 6c9081a3915dc0782a8f1424343b794f2cf53d9c (patch) | |
| tree | f4f751d693daadfe7794648c529958b1da1b7b5b /net/tipc/core.h | |
| parent | Merge branch 'flow_offload-add-indr-block-in-nf_table_offload' (diff) | |
| download | linux-dev-6c9081a3915dc0782a8f1424343b794f2cf53d9c.tar.xz linux-dev-6c9081a3915dc0782a8f1424343b794f2cf53d9c.zip | |
tipc: add loopback device tracking
Since node internal messages are passed directly to the socket, it is not
possible to observe those messages via tcpdump or wireshark.
We now remedy this by making it possible to clone such messages and send
the clones to the loopback interface. The clones are dropped at reception
and have no functional role except making the traffic visible.
The feature is enabled if network taps are active for the loopback device.
pcap filtering restrictions require the messages to be presented to the
receiving side of the loopback device.
v3 - Function dev_nit_active used to check for network taps.
- Procedure netif_rx_ni used to send cloned messages to loopback device.
Signed-off-by: John Rutherford <john.rutherford@dektech.com.au>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/core.h')
| -rw-r--r-- | net/tipc/core.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/tipc/core.h b/net/tipc/core.h index 7a68e1b6a066..60d829581068 100644 --- a/net/tipc/core.h +++ b/net/tipc/core.h @@ -125,6 +125,9 @@ struct tipc_net { /* Cluster capabilities */ u16 capabilities; + + /* Tracing of node internal messages */ + struct packet_type loopback_pt; }; static inline struct tipc_net *tipc_net(struct net *net) |