[DCCP]: Don't use necessarily the same CCID for tx and rx

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/dccp.h

@@ -330,7 +330,8 @@ static inline unsigned int dccp_hdr_len(const struct sk_buff *skb)
   */
 struct dccp_options {
 	__u64	dccpo_sequence_window;
-	__u8	dccpo_ccid;
+	__u8	dccpo_rx_ccid;
+	__u8	dccpo_tx_ccid;
 	__u8	dccpo_send_ack_vector;
 	__u8	dccpo_send_ndp_count;
 };

net/dccp/ipv4.c

@@ -1241,9 +1241,9 @@ static int dccp_v4_init_sock(struct sock *sk)
 	 * setsockopt(CCIDs-I-want/accept). -acme
 	 */
 	if (likely(!dccp_ctl_socket_init)) {
-		dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+		dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_rx_ccid,
 						 sk);
-		dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+		dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_tx_ccid,
 						 sk);
 	    	if (dp->dccps_hc_rx_ccid == NULL ||
 		    dp->dccps_hc_tx_ccid == NULL) {

net/dccp/options.c

@@ -25,7 +25,8 @@
 /* stores the default values for new connection. may be changed with sysctl */
 static const struct dccp_options dccpo_default_values = {
 	.dccpo_sequence_window	  = DCCPF_INITIAL_SEQUENCE_WINDOW,
-	.dccpo_ccid		  = DCCPF_INITIAL_CCID,
+	.dccpo_rx_ccid		  = DCCPF_INITIAL_CCID,
+	.dccpo_tx_ccid		  = DCCPF_INITIAL_CCID,
 	.dccpo_send_ack_vector	  = DCCPF_INITIAL_SEND_ACK_VECTOR,
 	.dccpo_send_ndp_count	  = DCCPF_INITIAL_SEND_NDP_COUNT,
 };