[DCCP]: Add test function for data packets
This adds a function which returns `true' when an skb contains one of the packet
types specified in [RFC 4340, 7.7] as `data packet'.
NB - Resisted the temptation to define
int dccp_non_data_packet(skb) { return !dccp_data_packet(skb); },
since maybe someone will define new packet types.
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
---
net/dccp/dccp.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -321,6 +321,7 @@ struct dccp_skb_cb {
#define DCCP_SKB_CB(__skb) ((struct dccp_skb_cb *)&((__skb)->cb[0]))
+/* RFC 4340, sec. 7.7 */
static inline int dccp_non_data_packet(const struct sk_buff *skb)
{
const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
@@ -333,6 +334,17 @@ static inline int dccp_non_data_packet(c
type == DCCP_PKT_SYNCACK;
}
+/* RFC 4340, sec. 7.7 */
+static inline int dccp_data_packet(const struct sk_buff *skb)
+{
+ const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
+
+ return type == DCCP_PKT_DATA ||
+ type == DCCP_PKT_DATAACK ||
+ type == DCCP_PKT_REQUEST ||
+ type == DCCP_PKT_RESPONSE;
+}
+
static inline int dccp_packet_without_ack(const struct sk_buff *skb)
{
const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
-
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