From: Arnaldo Carvalho de Melo Date: Wed, 14 Dec 2005 07:16:16 +0000 (-0800) Subject: [DCCP]: Introduce dccp_ipv4_af_ops X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=57cca05af1e20fdc65b55be52c042c234f86c866;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [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: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- diff --git a/net/dccp/input.c b/net/dccp/input.c index 3454d5941900..c81488fa293e 100644 --- a/net/dccp/input.c +++ b/net/dccp/input.c @@ -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 */ diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 1ac3e30ae791..0ce7d0fe5ee7 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -607,6 +607,15 @@ out: 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 @@ do_time_wait: 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; diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c index 1393461898bb..c7ff80cf53a0 100644 --- a/net/dccp/minisocks.c +++ b/net/dccp/minisocks.c @@ -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; diff --git a/net/dccp/output.c b/net/dccp/output.c index 74ff87025878..f35880503bb8 100644 --- a/net/dccp/output.c +++ b/net/dccp/output.c @@ -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) ? diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 8a6b2a9e4581..7b30c12147c2 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -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;