[IPTABLES][PATCHv2] xt_sctp: support a couple of new chunk types

[IPTABLES][PATCHv2] xt_sctp: support a couple of new chunk types

[Yuxuan Luo]

There are new chunks added in Linux SCTP not being traced by iptables.

This patch introduces the following chunks for tracing:
I_DATA, I_FORWARD_TSN (RFC8260), RE_CONFIG(RFC6525) and PAD(RFC4820)

Signed-off-by: Yuxuan Luo <luoyuxuan.carl@gmail.com>
---
 extensions/libxt_sctp.c   | 4 ++++
 extensions/libxt_sctp.man | 4 +++-
 extensions/libxt_sctp.t   | 4 ++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/extensions/libxt_sctp.c b/extensions/libxt_sctp.c
index a4c5415f..3fb6cf1a 100644
--- a/extensions/libxt_sctp.c
+++ b/extensions/libxt_sctp.c
@@ -112,9 +112,13 @@ static const struct sctp_chunk_names sctp_chunk_names[]
     { .name = "ECN_ECNE",	.chunk_type = 12,  .valid_flags = "--------", .nftname = "ecne" },
     { .name = "ECN_CWR",	.chunk_type = 13,  .valid_flags = "--------", .nftname = "cwr" },
     { .name = "SHUTDOWN_COMPLETE", .chunk_type = 14,  .valid_flags = "-------T", .nftname = "shutdown-complete" },
+    { .name = "I_DATA",		.chunk_type = 64,   .valid_flags = "----IUBE", .nftname = "i-data"},
+    { .name = "RE_CONFIG",	.chunk_type = 130,  .valid_flags = "--------", .nftname = "re-config"},
+    { .name = "PAD",		.chunk_type = 132,  .valid_flags = "--------", .nftname = "pad"},
     { .name = "ASCONF",		.chunk_type = 193,  .valid_flags = "--------", .nftname = "asconf" },
     { .name = "ASCONF_ACK",	.chunk_type = 128,  .valid_flags = "--------", .nftname = "asconf-ack" },
     { .name = "FORWARD_TSN",	.chunk_type = 192,  .valid_flags = "--------", .nftname = "forward-tsn" },
+    { .name = "I_FORWARD_TSN",	.chunk_type = 194,  .valid_flags = "--------", .nftname = "i-forward-tsn" },
 };
 
 static void
diff --git a/extensions/libxt_sctp.man b/extensions/libxt_sctp.man
index 3e5ffa09..06da04f8 100644
--- a/extensions/libxt_sctp.man
+++ b/extensions/libxt_sctp.man
@@ -19,12 +19,14 @@ Match if any of the given chunk types is present with given flags.
 only
 Match if only the given chunk types are present with given flags and none are missing.
 
-Chunk types: DATA INIT INIT_ACK SACK HEARTBEAT HEARTBEAT_ACK ABORT SHUTDOWN SHUTDOWN_ACK ERROR COOKIE_ECHO COOKIE_ACK ECN_ECNE ECN_CWR SHUTDOWN_COMPLETE ASCONF ASCONF_ACK FORWARD_TSN
+Chunk types: DATA INIT INIT_ACK SACK HEARTBEAT HEARTBEAT_ACK ABORT SHUTDOWN SHUTDOWN_ACK ERROR COOKIE_ECHO COOKIE_ACK ECN_ECNE ECN_CWR SHUTDOWN_COMPLETE I_DATA RE_CONFIG PAD ASCONF ASCONF_ACK FORWARD_TSN I_FORWARD_TSN
 
 chunk type            available flags      
 .br
 DATA                  I U B E i u b e
 .br
+I_DATA                I U B E i u b e
+.br
 ABORT                 T t                 
 .br
 SHUTDOWN_COMPLETE     T t                 
diff --git a/extensions/libxt_sctp.t b/extensions/libxt_sctp.t
index 4016e4fb..6f04f1db 100644
--- a/extensions/libxt_sctp.t
+++ b/extensions/libxt_sctp.t
@@ -27,3 +27,7 @@
 -p sctp -m sctp --chunk-types all ASCONF_ACK;=;OK
 -p sctp -m sctp --chunk-types all FORWARD_TSN;=;OK
 -p sctp -m sctp --chunk-types all SHUTDOWN_COMPLETE;=;OK
+-p sctp -m sctp --chunk-types all I_DATA;=;OK
+-p sctp -m sctp --chunk-types all RE_CONFIG;=;OK
+-p sctp -m sctp --chunk-types all PAD;=;OK
+-p sctp -m sctp --chunk-types all I_FORWARD_FSN;=;OK
-- 
2.31.1