exthdr: Implement SCTP Chunk matching

Extend exthdr expression to support scanning through SCTP packet chunks
and matching on fixed fields' values.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Florian Westphal <fw@strlen.de>

1 files changed, 155 insertions, 0 deletions

diff --git a/tests/py/inet/sctp.t.payload b/tests/py/inet/sctp.t.payload
index ecfcc725..9c4854cf 100644
--- a/tests/py/inet/sctp.t.payload
+++ b/tests/py/inet/sctp.t.payload
@@ -274,3 +274,158 @@ inet test-inet input
   [ payload load 4b @ transport header + 4 => reg 1 ]
   [ lookup reg 1 set __set%d 0x1 ]
 
+# sctp chunk data exists
+ip
+  [ exthdr load 1b @ 0 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk init exists
+ip
+  [ exthdr load 1b @ 1 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk init-ack exists
+ip
+  [ exthdr load 1b @ 2 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk sack exists
+ip
+  [ exthdr load 1b @ 3 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk heartbeat exists
+ip
+  [ exthdr load 1b @ 4 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk heartbeat-ack exists
+ip
+  [ exthdr load 1b @ 5 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk abort exists
+ip
+  [ exthdr load 1b @ 6 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk shutdown exists
+ip
+  [ exthdr load 1b @ 7 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk shutdown-ack exists
+ip
+  [ exthdr load 1b @ 8 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk error exists
+ip
+  [ exthdr load 1b @ 9 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk cookie-echo exists
+ip
+  [ exthdr load 1b @ 10 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk cookie-ack exists
+ip
+  [ exthdr load 1b @ 11 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk ecne exists
+ip
+  [ exthdr load 1b @ 12 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk cwr exists
+ip
+  [ exthdr load 1b @ 13 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk shutdown-complete exists
+ip
+  [ exthdr load 1b @ 14 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk asconf-ack exists
+ip
+  [ exthdr load 1b @ 128 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk forward-tsn exists
+ip
+  [ exthdr load 1b @ 192 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk asconf exists
+ip
+  [ exthdr load 1b @ 193 + 0 present => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+
+# sctp chunk data type 0
+ip
+  [ exthdr load 1b @ 0 + 0 => reg 1 ]
+  [ cmp eq reg 1 0x00000000 ]
+
+# sctp chunk init flags 23
+ip
+  [ exthdr load 1b @ 1 + 1 => reg 1 ]
+  [ cmp eq reg 1 0x00000017 ]
+
+# sctp chunk init-ack length 42
+ip
+  [ exthdr load 2b @ 2 + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00002a00 ]
+
+# sctp chunk data stream 1337
+ip
+  [ exthdr load 2b @ 0 + 8 => reg 1 ]
+  [ cmp eq reg 1 0x00003905 ]
+
+# sctp chunk init initial-tsn 5
+ip
+  [ exthdr load 4b @ 1 + 16 => reg 1 ]
+  [ cmp eq reg 1 0x05000000 ]
+
+# sctp chunk init-ack num-outbound-streams 3
+ip
+  [ exthdr load 2b @ 2 + 12 => reg 1 ]
+  [ cmp eq reg 1 0x00000300 ]
+
+# sctp chunk sack a-rwnd 1
+ip
+  [ exthdr load 4b @ 3 + 8 => reg 1 ]
+  [ cmp eq reg 1 0x01000000 ]
+
+# sctp chunk shutdown cum-tsn-ack 65535
+ip
+  [ exthdr load 4b @ 7 + 4 => reg 1 ]
+  [ cmp eq reg 1 0xffff0000 ]
+
+# sctp chunk ecne lowest-tsn 5
+ip
+  [ exthdr load 4b @ 12 + 4 => reg 1 ]
+  [ cmp eq reg 1 0x05000000 ]
+
+# sctp chunk cwr lowest-tsn 8
+ip
+  [ exthdr load 4b @ 13 + 4 => reg 1 ]
+  [ cmp eq reg 1 0x08000000 ]
+
+# sctp chunk asconf-ack seqno 12345
+ip
+  [ exthdr load 4b @ 128 + 4 => reg 1 ]
+  [ cmp eq reg 1 0x39300000 ]
+
+# sctp chunk forward-tsn new-cum-tsn 31337
+ip
+  [ exthdr load 4b @ 192 + 4 => reg 1 ]
+  [ cmp eq reg 1 0x697a0000 ]
+
+# sctp chunk asconf seqno 12345
+ip
+  [ exthdr load 4b @ 193 + 4 => reg 1 ]
+  [ cmp eq reg 1 0x39300000 ]
+