payload: add DCCP packet type definitions

# nft describe dccp type
payload expression, datatype dccp_pkttype (DCCP packet type) (basetype integer), 4 bits

pre-defined symbolic constants:
	request                       	0x0
	response                      	0x1
	data                          	0x2
	ack                           	0x3
	dataack                       	0x4
	closereq                      	0x5
	close                         	0x6
	reset                         	0x7
	sync                          	0x8
	syncack                       	0x9

Signed-off-by: Patrick McHardy <kaber@trash.net>

2 files changed, 30 insertions, 0 deletions

diff --git a/src/parser.y b/src/parser.y
index 419dcd72..3004cb25 100644
--- a/src/parser.y
+++ b/src/parser.y
@@ -1439,6 +1439,7 @@ dccp_hdr_expr		:	DCCP	dccp_hdr_field
 
 dccp_hdr_field		:	SPORT		{ $$ = DCCPHDR_SPORT; }
 			|	DPORT		{ $$ = DCCPHDR_DPORT; }
+			|	TYPE		{ $$ = DCCPHDR_TYPE; }
 			;
 
 sctp_hdr_expr		:	SCTP	sctp_hdr_field
diff --git a/src/payload.c b/src/payload.c
index f41d4c17..944fed1b 100644
--- a/src/payload.c
+++ b/src/payload.c
@@ -691,6 +691,33 @@ const struct payload_desc payload_tcp = {
  * DCCP
  */
 
+static const struct symbol_table dccp_pkttype_tbl = {
+	.symbols	= {
+		SYMBOL("request",	DCCP_PKT_REQUEST),
+		SYMBOL("response",	DCCP_PKT_RESPONSE),
+		SYMBOL("data",		DCCP_PKT_DATA),
+		SYMBOL("ack",		DCCP_PKT_ACK),
+		SYMBOL("dataack",	DCCP_PKT_DATAACK),
+		SYMBOL("closereq",	DCCP_PKT_CLOSEREQ),
+		SYMBOL("close",		DCCP_PKT_CLOSE),
+		SYMBOL("reset",		DCCP_PKT_RESET),
+		SYMBOL("sync",		DCCP_PKT_SYNC),
+		SYMBOL("syncack",	DCCP_PKT_SYNCACK),
+		SYMBOL_LIST_END
+	},
+};
+
+static const struct datatype dccp_pkttype_type = {
+	.type		= TYPE_DCCP_PKTTYPE,
+	.name		= "dccp_pkttype",
+	.desc		= "DCCP packet type",
+	.byteorder	= BYTEORDER_INVALID,
+	.size		= 4,
+	.basetype	= &integer_type,
+	.sym_tbl	= &dccp_pkttype_tbl,
+};
+
+
 #define DCCPHDR_FIELD(__name, __member) \
 	HDR_FIELD(__name, struct dccp_hdr, __member)
 
@@ -700,6 +727,7 @@ const struct payload_desc payload_dccp = {
 	.templates	= {
 		[DCCPHDR_SPORT]		= INET_SERVICE("sport", struct dccp_hdr, dccph_sport),
 		[DCCPHDR_DPORT]		= INET_SERVICE("dport", struct dccp_hdr, dccph_dport),
+		[DCCPHDR_TYPE]		= HDR_BITFIELD("type", &dccp_pkttype_type, 67, 4),
 	},
 };
 
@@ -925,6 +953,7 @@ static void __init payload_init(void)
 {
 	datatype_register(&icmp_type_type);
 	datatype_register(&tcp_flag_type);
+	datatype_register(&dccp_pkttype_type);
 	datatype_register(&arpop_type);
 	datatype_register(&ethertype_type);
 }