[DCCP]: Move dccp_v4_{init,destroy}_sock to the core

Removing one more ipv6 uses ipv4 stuff case in dccp land.

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

1 files changed, 102 insertions, 0 deletions

diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 6403e9306dd..1c32def2653 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -97,6 +97,108 @@ const char *dccp_state_name(const int state)
 
 EXPORT_SYMBOL_GPL(dccp_state_name);
 
+int dccp_init_sock(struct sock *sk)
+{
+	struct dccp_sock *dp = dccp_sk(sk);
+	struct inet_connection_sock *icsk = inet_csk(sk);
+	static int dccp_ctl_socket_init = 1;
+
+	dccp_options_init(&dp->dccps_options);
+	do_gettimeofday(&dp->dccps_epoch);
+
+	/*
+	 * FIXME: We're hardcoding the CCID, and doing this at this point makes
+	 * the listening (master) sock get CCID control blocks, which is not
+	 * necessary, but for now, to not mess with the test userspace apps,
+	 * lets leave it here, later the real solution is to do this in a
+	 * setsockopt(CCIDs-I-want/accept). -acme
+	 */
+	if (likely(!dccp_ctl_socket_init)) {
+		int rc = dccp_feat_init(sk);
+
+		if (rc)
+			return rc;
+
+		if (dp->dccps_options.dccpo_send_ack_vector) {
+			dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL);
+			if (dp->dccps_hc_rx_ackvec == NULL)
+				return -ENOMEM;
+		}
+		dp->dccps_hc_rx_ccid =
+				ccid_hc_rx_new(dp->dccps_options.dccpo_rx_ccid,
+					       sk, GFP_KERNEL);
+		dp->dccps_hc_tx_ccid =
+				ccid_hc_tx_new(dp->dccps_options.dccpo_tx_ccid,
+					       sk, GFP_KERNEL);
+	    	if (unlikely(dp->dccps_hc_rx_ccid == NULL ||
+			     dp->dccps_hc_tx_ccid == NULL)) {
+			ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
+			ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
+			if (dp->dccps_options.dccpo_send_ack_vector) {
+				dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
+				dp->dccps_hc_rx_ackvec = NULL;
+			}
+			dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
+			return -ENOMEM;
+		}
+	} else {
+		/* control socket doesn't need feat nego */
+		INIT_LIST_HEAD(&dp->dccps_options.dccpo_pending);
+		INIT_LIST_HEAD(&dp->dccps_options.dccpo_conf);
+		dccp_ctl_socket_init = 0;
+	}
+
+	dccp_init_xmit_timers(sk);
+	icsk->icsk_rto		= DCCP_TIMEOUT_INIT;
+	sk->sk_state		= DCCP_CLOSED;
+	sk->sk_write_space	= dccp_write_space;
+	icsk->icsk_sync_mss	= dccp_sync_mss;
+	dp->dccps_mss_cache	= 536;
+	dp->dccps_role		= DCCP_ROLE_UNDEFINED;
+	dp->dccps_service	= DCCP_SERVICE_INVALID_VALUE;
+	dp->dccps_l_ack_ratio	= dp->dccps_r_ack_ratio = 1;
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(dccp_init_sock);
+
+int dccp_destroy_sock(struct sock *sk)
+{
+	struct dccp_sock *dp = dccp_sk(sk);
+
+	/*
+	 * DCCP doesn't use sk_write_queue, just sk_send_head
+	 * for retransmissions
+	 */
+	if (sk->sk_send_head != NULL) {
+		kfree_skb(sk->sk_send_head);
+		sk->sk_send_head = NULL;
+	}
+
+	/* Clean up a referenced DCCP bind bucket. */
+	if (inet_csk(sk)->icsk_bind_hash != NULL)
+		inet_put_port(&dccp_hashinfo, sk);
+
+	kfree(dp->dccps_service_list);
+	dp->dccps_service_list = NULL;
+
+	if (dp->dccps_options.dccpo_send_ack_vector) {
+		dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
+		dp->dccps_hc_rx_ackvec = NULL;
+	}
+	ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
+	ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
+	dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
+
+	/* clean up feature negotiation state */
+	dccp_feat_clean(sk);
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(dccp_destroy_sock);
+
 static inline int dccp_listen_start(struct sock *sk)
 {
 	struct dccp_sock *dp = dccp_sk(sk);