dccp ccid-2: Use existing function to test for data packets

This replaces a switch statement with a test, using the equivalent
function dccp_data_packet(skb).  It also doubles the range of the field
`rx_num_data_pkts' by changing the type from `int' to `u32', avoiding
signed/unsigned comparison with the u16 field `dccps_r_ack_ratio'.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>

diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index e96d5e8..7d91798 100644 (file)
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -627,18 +627,14 @@ static void ccid2_hc_tx_exit(struct sock *sk)
 
 static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
 {
-       const struct dccp_sock *dp = dccp_sk(sk);
        struct ccid2_hc_rx_sock *hc = ccid2_hc_rx_sk(sk);
 
-       switch (DCCP_SKB_CB(skb)->dccpd_type) {
-       case DCCP_PKT_DATA:
-       case DCCP_PKT_DATAACK:
-               hc->rx_data++;
-               if (hc->rx_data >= dp->dccps_r_ack_ratio) {
-                       dccp_send_ack(sk);
-                       hc->rx_data = 0;
-               }
-               break;
+       if (!dccp_data_packet(skb))
+               return;
+
+       if (++hc->rx_num_data_pkts >= dccp_sk(sk)->dccps_r_ack_ratio) {
+               dccp_send_ack(sk);
+               hc->rx_num_data_pkts = 0;
        }
 }
 

diff --git a/net/dccp/ccids/ccid2.h b/net/dccp/ccids/ccid2.h
index f17460a..da021eb 100644 (file)
--- a/net/dccp/ccids/ccid2.h
+++ b/net/dccp/ccids/ccid2.h
@@ -97,8 +97,12 @@ static inline u32 rfc3390_bytes_to_packets(const u32 smss)
        return smss <= 1095 ? 4 : (smss > 2190 ? 2 : 3);
 }
 
+/**
+ * struct ccid2_hc_rx_sock  -  Receiving end of CCID-2 half-connection
+ * @rx_num_data_pkts: number of data packets received since last feedback
+ */
 struct ccid2_hc_rx_sock {
-       int     rx_data;
+       u32     rx_num_data_pkts;
 };
 
 static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk)