44 static inline __sum16 dccp_v6_csum_finish(struct sk_buff *skb,  in dccp_v6_csum_finish()  argument
48 	return csum_ipv6_magic(saddr, daddr, skb->len, IPPROTO_DCCP, skb->csum);  in dccp_v6_csum_finish()
51 static inline void dccp_v6_send_check(struct sock *sk, struct sk_buff *skb)  in dccp_v6_send_check()  argument
54 	struct dccp_hdr *dh = dccp_hdr(skb);  in dccp_v6_send_check()
56 	dccp_csum_outgoing(skb);  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()
60 static inline __u64 dccp_v6_init_sequence(struct sk_buff *skb)  in dccp_v6_init_sequence()  argument
62 	return secure_dccpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32,  in dccp_v6_init_sequence()
63 					     ipv6_hdr(skb)->saddr.s6_addr32,  in dccp_v6_init_sequence()
64 					     dccp_hdr(skb)->dccph_dport,  in dccp_v6_init_sequence()
65 					     dccp_hdr(skb)->dccph_sport     );  in dccp_v6_init_sequence()
69 static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,  in dccp_v6_err()  argument
72 	const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data;  in dccp_v6_err()
73 	const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset);  in dccp_v6_err()
79 	struct net *net = dev_net(skb->dev);  in dccp_v6_err()
81 	if (skb->len < offset + sizeof(*dh) ||  in dccp_v6_err()
82 	    skb->len < offset + __dccp_basic_hdr_len(dh)) {  in dccp_v6_err()
83 		ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev),  in dccp_v6_err()
91 					inet6_iif(skb));  in dccp_v6_err()
94 		ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev),  in dccp_v6_err()
127 			dst->ops->redirect(dst, sk, skb);  in dccp_v6_err()
188 	struct sk_buff *skb;  in dccp_v6_send_response()  local
216 	skb = dccp_make_response(sk, dst, req);  in dccp_v6_send_response()
217 	if (skb != NULL) {  in dccp_v6_send_response()
218 		struct dccp_hdr *dh = dccp_hdr(skb);  in dccp_v6_send_response()
220 		dh->dccph_checksum = dccp_v6_csum_finish(skb,  in dccp_v6_send_response()
225 		err = ip6_xmit(sk, skb, &fl6, rcu_dereference(np->opt),  in dccp_v6_send_response()
245 	struct sk_buff *skb;  in dccp_v6_ctl_send_reset()  local
257 	skb = dccp_ctl_make_reset(ctl_sk, rxskb);  in dccp_v6_ctl_send_reset()
258 	if (skb == NULL)  in dccp_v6_ctl_send_reset()
262 	dccp_hdr(skb)->dccph_checksum = dccp_v6_csum_finish(skb, &rxip6h->saddr,  in dccp_v6_ctl_send_reset()
271 	fl6.fl6_dport = dccp_hdr(skb)->dccph_dport;  in dccp_v6_ctl_send_reset()
272 	fl6.fl6_sport = dccp_hdr(skb)->dccph_sport;  in dccp_v6_ctl_send_reset()
278 		skb_dst_set(skb, dst);  in dccp_v6_ctl_send_reset()
279 		ip6_xmit(ctl_sk, skb, &fl6, NULL, 0);  in dccp_v6_ctl_send_reset()
285 	kfree_skb(skb);  in dccp_v6_ctl_send_reset()
298 static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)  in dccp_v6_conn_request()  argument
304 	const __be32 service = dccp_hdr_request(skb)->dccph_req_service;  in dccp_v6_conn_request()
305 	struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);  in dccp_v6_conn_request()
307 	if (skb->protocol == htons(ETH_P_IP))  in dccp_v6_conn_request()
308 		return dccp_v4_conn_request(sk, skb);  in dccp_v6_conn_request()
310 	if (!ipv6_unicast_destination(skb))  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()
342 	ireq->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr;  in dccp_v6_conn_request()
343 	ireq->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;  in dccp_v6_conn_request()
346 	if (ipv6_opt_accepted(sk, skb, IP6CB(skb)) ||  in dccp_v6_conn_request()
349 		atomic_inc(&skb->users);  in dccp_v6_conn_request()
350 		ireq->pktopts = skb;  in dccp_v6_conn_request()
357 		ireq->ir_iif = inet6_iif(skb);  in dccp_v6_conn_request()
368 	dreq->dreq_iss	   = dccp_v6_init_sequence(skb);  in dccp_v6_conn_request()
386 					      struct sk_buff *skb,  in dccp_v6_request_recv_sock()  argument
400 	if (skb->protocol == htons(ETH_P_IP)) {  in dccp_v6_request_recv_sock()
404 		newsk = dccp_v4_request_recv_sock(sk, skb, req, dst,  in dccp_v6_request_recv_sock()
422 		newnp->mcast_oif   = inet6_iif(skb);  in dccp_v6_request_recv_sock()
423 		newnp->mcast_hops  = ipv6_hdr(skb)->hop_limit;  in dccp_v6_request_recv_sock()
452 	newsk = dccp_create_openreq_child(sk, req, skb);  in dccp_v6_request_recv_sock()
488 	newnp->mcast_oif  = inet6_iif(skb);  in dccp_v6_request_recv_sock()
489 	newnp->mcast_hops = ipv6_hdr(skb)->hop_limit;  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
559 	if (skb->protocol == htons(ETH_P_IP))  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()
588 		opt_skb = skb_clone(skb, GFP_ATOMIC);  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()
638 	kfree_skb(skb);  in dccp_v6_do_rcv()
642 static int dccp_v6_rcv(struct sk_buff *skb)  in dccp_v6_rcv()  argument
650 	if (dccp_invalid_packet(skb))  in dccp_v6_rcv()
654 	if (dccp_v6_csum_finish(skb, &ipv6_hdr(skb)->saddr,  in dccp_v6_rcv()
655 				     &ipv6_hdr(skb)->daddr)) {  in dccp_v6_rcv()
660 	dh = dccp_hdr(skb);  in dccp_v6_rcv()
662 	DCCP_SKB_CB(skb)->dccpd_seq  = dccp_hdr_seq(dh);  in dccp_v6_rcv()
663 	DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;  in dccp_v6_rcv()
665 	if (dccp_packet_without_ack(skb))  in dccp_v6_rcv()
666 		DCCP_SKB_CB(skb)->dccpd_ack_seq = DCCP_PKT_WITHOUT_ACK_SEQ;  in dccp_v6_rcv()
668 		DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb);  in dccp_v6_rcv()
671 	sk = __inet6_lookup_skb(&dccp_hashinfo, skb,  in dccp_v6_rcv()
673 				inet6_iif(skb));  in dccp_v6_rcv()
702 		nsk = dccp_check_req(sk, skb, req);  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()
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()
736 	if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))  in dccp_v6_rcv()
745 		DCCP_SKB_CB(skb)->dccpd_reset_code =  in dccp_v6_rcv()
747 		dccp_v6_ctl_send_reset(sk, skb);  in dccp_v6_rcv()
751 	kfree_skb(skb);  in dccp_v6_rcv()