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Commit 57cca05a authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by David S. Miller
Browse files

[DCCP]: Introduce dccp_ipv4_af_ops 



And make the core DCCP code AF agnostic, just like TCP, now its time
to work on net/dccp/ipv6.c, we are close to the end!

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent af05dc93

net/dccp/input.c

+3 −2
Original line number Diff line number Diff line
@@ -329,7 +329,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk, 
		dccp_set_state(sk, DCCP_PARTOPEN);



		/* Make sure socket is routed, for correct metrics. */

		inet_sk_rebuild_header(sk);

		icsk->icsk_af_ops->rebuild_header(sk);



		if (!sock_flag(sk, SOCK_DEAD)) {

			sk->sk_state_change(sk);
@@ -444,7 +444,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb, 
	 */

	if (sk->sk_state == DCCP_LISTEN) {

		if (dh->dccph_type == DCCP_PKT_REQUEST) {

			if (dccp_v4_conn_request(sk, skb) < 0)

			if (inet_csk(sk)->icsk_af_ops->conn_request(sk,

								    skb) < 0)

				return 1;



			/* FIXME: do congestion control initialization */

net/dccp/ipv4.c

+23 −0
Original line number Diff line number Diff line
@@ -607,6 +607,15 @@ void dccp_v4_err(struct sk_buff *skb, u32 info) 
	sock_put(sk);

}



/* This routine computes an IPv4 DCCP checksum. */

static void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)

{

	const struct inet_sock *inet = inet_sk(sk);

	struct dccp_hdr *dh = dccp_hdr(skb);



	dh->dccph_checksum = dccp_v4_checksum(skb, inet->saddr, inet->daddr);

}



int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code)

{

	struct sk_buff *skb;
@@ -1195,6 +1204,19 @@ int dccp_v4_rcv(struct sk_buff *skb) 
	goto no_dccp_socket;

}



struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {

	.queue_xmit	= ip_queue_xmit,

	.send_check	= dccp_v4_send_check,

	.rebuild_header	= inet_sk_rebuild_header,

	.conn_request	= dccp_v4_conn_request,

	.syn_recv_sock	= dccp_v4_request_recv_sock,

	.net_header_len	= sizeof(struct iphdr),

	.setsockopt	= ip_setsockopt,

	.getsockopt	= ip_getsockopt,

	.addr2sockaddr	= inet_csk_addr2sockaddr,

	.sockaddr_len	= sizeof(struct sockaddr_in),

};



static int dccp_v4_init_sock(struct sock *sk)

{

	struct dccp_sock *dp = dccp_sk(sk);
@@ -1240,6 +1262,7 @@ static int dccp_v4_init_sock(struct sock *sk) 
	inet_csk(sk)->icsk_rto = DCCP_TIMEOUT_INIT;

	sk->sk_state = DCCP_CLOSED;

	sk->sk_write_space = dccp_write_space;

	inet_csk(sk)->icsk_af_ops = &dccp_ipv4_af_ops;

	dp->dccps_mss_cache = 536;

	dp->dccps_role = DCCP_ROLE_UNDEFINED;

	dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;

net/dccp/minisocks.c

+1 −1
Original line number Diff line number Diff line
@@ -214,7 +214,7 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb, 
		goto drop;

	}



	child = dccp_v4_request_recv_sock(sk, skb, req, NULL);

	child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL);

	if (child == NULL)

		goto listen_overflow;

net/dccp/output.c

+6 −8
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb) 
{

	if (likely(skb != NULL)) {

		const struct inet_sock *inet = inet_sk(sk);

		const struct inet_connection_sock *icsk = inet_csk(sk);

		struct dccp_sock *dp = dccp_sk(sk);

		struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);

		struct dccp_hdr *dh;
@@ -108,8 +109,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb) 
			break;

		}



		dh->dccph_checksum = dccp_v4_checksum(skb, inet->saddr,

						      inet->daddr);

		icsk->icsk_af_ops->send_check(sk, skb->len, skb);



		if (set_ack)

			dccp_event_ack_sent(sk);
@@ -117,7 +117,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb) 
		DCCP_INC_STATS(DCCP_MIB_OUTSEGS);



		memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));

		err = ip_queue_xmit(skb, 0);

		err = icsk->icsk_af_ops->queue_xmit(skb, 0);

		if (err <= 0)

			return err;
@@ -135,16 +135,14 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb) 
unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)

{

	struct dccp_sock *dp = dccp_sk(sk);

	int mss_now;



	/*

	 * FIXME: we really should be using the af_specific thing to support

	 * 	  IPv6.

	 * mss_now = pmtu - tp->af_specific->net_header_len -

	 * 	     sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext);

	 */

	mss_now = pmtu - sizeof(struct iphdr) - sizeof(struct dccp_hdr) -

		  sizeof(struct dccp_hdr_ext);

	int mss_now = (pmtu - inet_csk(sk)->icsk_af_ops->net_header_len -

		       sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext));



	/* Now subtract optional transport overhead */

	mss_now -= dp->dccps_ext_header_len;
@@ -266,7 +264,7 @@ int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo) 


int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb)

{

	if (inet_sk_rebuild_header(sk) != 0)

	if (inet_csk(sk)->icsk_af_ops->rebuild_header(sk) != 0)

		return -EHOSTUNREACH; /* Routing failure or similar. */



	return dccp_transmit_skb(sk, (skb_cloned(skb) ?

net/dccp/proto.c

+6 −3
Original line number Diff line number Diff line
@@ -254,7 +254,9 @@ int dccp_setsockopt(struct sock *sk, int level, int optname, 
	int val;



	if (level != SOL_DCCP)

		return ip_setsockopt(sk, level, optname, optval, optlen);

		return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level,

							     optname, optval,

							     optlen);



	if (optlen < sizeof(int))

		return -EINVAL;
@@ -320,8 +322,9 @@ int dccp_getsockopt(struct sock *sk, int level, int optname, 
	int val, len;



	if (level != SOL_DCCP)

		return ip_getsockopt(sk, level, optname, optval, optlen);



		return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level,

							     optname, optval,

							     optlen);

	if (get_user(len, optlen))

		return -EFAULT;