51 static inline void dccp_v6_send_check(struct sock *sk, struct sk_buff *skb)  in dccp_v6_send_check()  argument
53 	struct ipv6_pinfo *np = inet6_sk(sk);  in dccp_v6_send_check()
57 	dh->dccph_checksum = dccp_v6_csum_finish(skb, &np->saddr, &sk->sk_v6_daddr);  in dccp_v6_send_check()
76 	struct sock *sk;  in dccp_v6_err()  local
88 	sk = __inet6_lookup_established(net, &dccp_hashinfo,  in dccp_v6_err()
93 	if (!sk) {  in dccp_v6_err()
99 	if (sk->sk_state == DCCP_TIME_WAIT) {  in dccp_v6_err()
100 		inet_twsk_put(inet_twsk(sk));  in dccp_v6_err()
104 	if (sk->sk_state == DCCP_NEW_SYN_RECV)  in dccp_v6_err()
105 		return dccp_req_err(sk, seq);  in dccp_v6_err()
107 	bh_lock_sock(sk);  in dccp_v6_err()
108 	if (sock_owned_by_user(sk))  in dccp_v6_err()
111 	if (sk->sk_state == DCCP_CLOSED)  in dccp_v6_err()
114 	dp = dccp_sk(sk);  in dccp_v6_err()
115 	if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_LISTEN) &&  in dccp_v6_err()
121 	np = inet6_sk(sk);  in dccp_v6_err()
124 		struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie);  in dccp_v6_err()
127 			dst->ops->redirect(dst, sk, skb);  in dccp_v6_err()
134 		if (!ip6_sk_accept_pmtu(sk))  in dccp_v6_err()
137 		if (sock_owned_by_user(sk))  in dccp_v6_err()
139 		if ((1 << sk->sk_state) & (DCCPF_LISTEN | DCCPF_CLOSED))  in dccp_v6_err()
142 		dst = inet6_csk_update_pmtu(sk, ntohl(info));  in dccp_v6_err()
146 		if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst))  in dccp_v6_err()
147 			dccp_sync_mss(sk, dst_mtu(dst));  in dccp_v6_err()
154 	switch (sk->sk_state) {  in dccp_v6_err()
158 		if (!sock_owned_by_user(sk)) {  in dccp_v6_err()
160 			sk->sk_err = err;  in dccp_v6_err()
165 			sk->sk_error_report(sk);  in dccp_v6_err()
166 			dccp_done(sk);  in dccp_v6_err()
168 			sk->sk_err_soft = err;  in dccp_v6_err()
172 	if (!sock_owned_by_user(sk) && np->recverr) {  in dccp_v6_err()
173 		sk->sk_err = err;  in dccp_v6_err()
174 		sk->sk_error_report(sk);  in dccp_v6_err()
176 		sk->sk_err_soft = err;  in dccp_v6_err()
179 	bh_unlock_sock(sk);  in dccp_v6_err()
180 	sock_put(sk);  in dccp_v6_err()
184 static int dccp_v6_send_response(const struct sock *sk, struct request_sock *req)  in dccp_v6_send_response()  argument
187 	struct ipv6_pinfo *np = inet6_sk(sk);  in dccp_v6_send_response()
209 	dst = ip6_dst_lookup_flow(sk, &fl6, final_p);  in dccp_v6_send_response()
216 	skb = dccp_make_response(sk, dst, req);  in dccp_v6_send_response()
225 		err = ip6_xmit(sk, skb, &fl6, rcu_dereference(np->opt),  in dccp_v6_send_response()
242 static void dccp_v6_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb)  in dccp_v6_ctl_send_reset()  argument
298 static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)  in dccp_v6_conn_request()  argument
303 	struct ipv6_pinfo *np = inet6_sk(sk);  in dccp_v6_conn_request()
308 		return dccp_v4_conn_request(sk, skb);  in dccp_v6_conn_request()
313 	if (dccp_bad_service_code(sk, service)) {  in dccp_v6_conn_request()
321 	if (inet_csk_reqsk_queue_is_full(sk))  in dccp_v6_conn_request()
324 	if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)  in dccp_v6_conn_request()
327 	req = inet_reqsk_alloc(&dccp6_request_sock_ops, sk, true);  in dccp_v6_conn_request()
331 	if (dccp_reqsk_init(req, dccp_sk(sk), skb))  in dccp_v6_conn_request()
335 	if (dccp_parse_options(sk, dreq, skb))  in dccp_v6_conn_request()
338 	if (security_inet_conn_request(sk, skb, req))  in dccp_v6_conn_request()
346 	if (ipv6_opt_accepted(sk, skb, IP6CB(skb)) ||  in dccp_v6_conn_request()
352 	ireq->ir_iif = sk->sk_bound_dev_if;  in dccp_v6_conn_request()
355 	if (!sk->sk_bound_dev_if &&  in dccp_v6_conn_request()
372 	if (dccp_v6_send_response(sk, req))  in dccp_v6_conn_request()
375 	inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);  in dccp_v6_conn_request()
385 static struct sock *dccp_v6_request_recv_sock(const struct sock *sk,  in dccp_v6_request_recv_sock()  argument
394 	const struct ipv6_pinfo *np = inet6_sk(sk);  in dccp_v6_request_recv_sock()
404 		newsk = dccp_v4_request_recv_sock(sk, skb, req, dst,  in dccp_v6_request_recv_sock()
441 	if (sk_acceptq_is_full(sk))  in dccp_v6_request_recv_sock()
447 		dst = inet6_csk_route_req(sk, &fl6, req, IPPROTO_DCCP);  in dccp_v6_request_recv_sock()
452 	newsk = dccp_create_openreq_child(sk, req, skb);  in dccp_v6_request_recv_sock()
512 	if (__inet_inherit_port(sk, newsk) < 0) {  in dccp_v6_request_recv_sock()
530 	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);  in dccp_v6_request_recv_sock()
534 	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);  in dccp_v6_request_recv_sock()
546 static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)  in dccp_v6_do_rcv()  argument
548 	struct ipv6_pinfo *np = inet6_sk(sk);  in dccp_v6_do_rcv()
560 		return dccp_v4_do_rcv(sk, skb);  in dccp_v6_do_rcv()
562 	if (sk_filter(sk, skb))  in dccp_v6_do_rcv()
590 	if (sk->sk_state == DCCP_OPEN) { /* Fast path */  in dccp_v6_do_rcv()
591 		if (dccp_rcv_established(sk, skb, dccp_hdr(skb), skb->len))  in dccp_v6_do_rcv()
625 	if (dccp_rcv_state_process(sk, skb, dccp_hdr(skb), skb->len))  in dccp_v6_do_rcv()
634 	dccp_v6_ctl_send_reset(sk, skb);  in dccp_v6_do_rcv()
645 	struct sock *sk;  in dccp_v6_rcv()  local
671 	sk = __inet6_lookup_skb(&dccp_hashinfo, skb,  in dccp_v6_rcv()
674 	if (!sk) {  in dccp_v6_rcv()
686 	if (sk->sk_state == DCCP_TIME_WAIT) {  in dccp_v6_rcv()
688 		inet_twsk_put(inet_twsk(sk));  in dccp_v6_rcv()
692 	if (sk->sk_state == DCCP_NEW_SYN_RECV) {  in dccp_v6_rcv()
693 		struct request_sock *req = inet_reqsk(sk);  in dccp_v6_rcv()
696 		sk = req->rsk_listener;  in dccp_v6_rcv()
697 		if (unlikely(sk->sk_state != DCCP_LISTEN)) {  in dccp_v6_rcv()
698 			inet_csk_reqsk_queue_drop_and_put(sk, req);  in dccp_v6_rcv()
701 		sock_hold(sk);  in dccp_v6_rcv()
702 		nsk = dccp_check_req(sk, skb, req);  in dccp_v6_rcv()
707 		if (nsk == sk) {  in dccp_v6_rcv()
709 		} else if (dccp_child_process(sk, nsk, skb)) {  in dccp_v6_rcv()
710 			dccp_v6_ctl_send_reset(sk, skb);  in dccp_v6_rcv()
713 			sock_put(sk);  in dccp_v6_rcv()
722 	min_cov = dccp_sk(sk)->dccps_pcrlen;  in dccp_v6_rcv()
730 	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))  in dccp_v6_rcv()
733 	return sk_receive_skb(sk, skb, 1) ? -1 : 0;  in dccp_v6_rcv()
747 		dccp_v6_ctl_send_reset(sk, skb);  in dccp_v6_rcv()
755 	sock_put(sk);  in dccp_v6_rcv()
759 static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,  in dccp_v6_connect()  argument
763 	struct inet_connection_sock *icsk = inet_csk(sk);  in dccp_v6_connect()
764 	struct inet_sock *inet = inet_sk(sk);  in dccp_v6_connect()
765 	struct ipv6_pinfo *np = inet6_sk(sk);  in dccp_v6_connect()
766 	struct dccp_sock *dp = dccp_sk(sk);  in dccp_v6_connect()
789 			flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);  in dccp_v6_connect()
812 			if (sk->sk_bound_dev_if &&  in dccp_v6_connect()
813 			    sk->sk_bound_dev_if != usin->sin6_scope_id)  in dccp_v6_connect()
816 			sk->sk_bound_dev_if = usin->sin6_scope_id;  in dccp_v6_connect()
820 		if (!sk->sk_bound_dev_if)  in dccp_v6_connect()
824 	sk->sk_v6_daddr = usin->sin6_addr;  in dccp_v6_connect()
834 		SOCK_DEBUG(sk, "connect: ipv4 mapped\n");  in dccp_v6_connect()
836 		if (__ipv6_only_sock(sk))  in dccp_v6_connect()
844 		sk->sk_backlog_rcv = dccp_v4_do_rcv;  in dccp_v6_connect()
846 		err = dccp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));  in dccp_v6_connect()
850 			sk->sk_backlog_rcv = dccp_v6_do_rcv;  in dccp_v6_connect()
853 		np->saddr = sk->sk_v6_rcv_saddr;  in dccp_v6_connect()
857 	if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr))  in dccp_v6_connect()
858 		saddr = &sk->sk_v6_rcv_saddr;  in dccp_v6_connect()
861 	fl6.daddr = sk->sk_v6_daddr;  in dccp_v6_connect()
863 	fl6.flowi6_oif = sk->sk_bound_dev_if;  in dccp_v6_connect()
866 	security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));  in dccp_v6_connect()
868 	opt = rcu_dereference_protected(np->opt, sock_owned_by_user(sk));  in dccp_v6_connect()
871 	dst = ip6_dst_lookup_flow(sk, &fl6, final_p);  in dccp_v6_connect()
879 		sk->sk_v6_rcv_saddr = *saddr;  in dccp_v6_connect()
886 	ip6_dst_store(sk, dst, NULL, NULL);  in dccp_v6_connect()
894 	dccp_set_state(sk, DCCP_REQUESTING);  in dccp_v6_connect()
895 	err = inet6_hash_connect(&dccp_death_row, sk);  in dccp_v6_connect()
900 						      sk->sk_v6_daddr.s6_addr32,  in dccp_v6_connect()
903 	err = dccp_connect(sk);  in dccp_v6_connect()
910 	dccp_set_state(sk, DCCP_CLOSED);  in dccp_v6_connect()
911 	__sk_dst_reset(sk);  in dccp_v6_connect()
914 	sk->sk_route_caps = 0;  in dccp_v6_connect()
959 static int dccp_v6_init_sock(struct sock *sk)  in dccp_v6_init_sock()  argument
962 	int err = dccp_init_sock(sk, dccp_v6_ctl_sock_initialized);  in dccp_v6_init_sock()
967 		inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops;  in dccp_v6_init_sock()
973 static void dccp_v6_destroy_sock(struct sock *sk)  in dccp_v6_destroy_sock()  argument
975 	dccp_destroy_sock(sk);  in dccp_v6_destroy_sock()
976 	inet6_destroy_sock(sk);  in dccp_v6_destroy_sock()