855 					 struct udphdr *uh,  in __udp4_lib_err_encap()  argument
882 	sk = __udp4_lib_lookup(net, iph->daddr, uh->source,  in __udp4_lib_err_encap()
883 			       iph->saddr, uh->dest, skb->dev->ifindex, 0, NULL);  in __udp4_lib_err_encap()
920 	struct udphdr *uh;  in udp_err()  local
925 	uh = (struct udphdr *)(skb->data + (iph->ihl << 2));  in udp_err()
926 	sk = __udp4_lib_lookup(net, iph->daddr, uh->dest,  in udp_err()
927 			       iph->saddr, uh->source, skb->dev->ifindex,  in udp_err()
933 			sk = __udp4_lib_err_encap(net, iph, uh, sk, skb, info);  in udp_err()
990 			udp_sk(sk)->encap_err_rcv(sk, skb, err, uh->dest, info,  in udp_err()
991 						  (u8 *)(uh+1));  in udp_err()
998 		ip_icmp_error(sk, skb, err, uh->dest, info, (u8 *)(uh+1));  in udp_err()
1029 	struct udphdr *uh = udp_hdr(skb);  in udp4_hwcsum()  local
1041 		uh->check = ~csum_tcpudp_magic(src, dst, len,  in udp4_hwcsum()
1059 		uh->check = csum_tcpudp_magic(src, dst, len, IPPROTO_UDP, csum);  in udp4_hwcsum()
1060 		if (uh->check == 0)  in udp4_hwcsum()
1061 			uh->check = CSUM_MANGLED_0;  in udp4_hwcsum()
1072 	struct udphdr *uh = udp_hdr(skb);  in udp_set_csum()  local
1075 		uh->check = 0;  in udp_set_csum()
1077 		uh->check = ~udp_v4_check(len, saddr, daddr, 0);  in udp_set_csum()
1079 		uh->check = 0;  in udp_set_csum()
1080 		uh->check = udp_v4_check(len, saddr, daddr, lco_csum(skb));  in udp_set_csum()
1081 		if (uh->check == 0)  in udp_set_csum()
1082 			uh->check = CSUM_MANGLED_0;  in udp_set_csum()
1087 		uh->check = ~udp_v4_check(len, saddr, daddr, 0);  in udp_set_csum()
1097 	struct udphdr *uh;  in udp_send_skb()  local
1102 	datalen = len - sizeof(*uh);  in udp_send_skb()
1107 	uh = udp_hdr(skb);  in udp_send_skb()
1108 	uh->source = inet_sk(sk)->inet_sport;  in udp_send_skb()
1109 	uh->dest = fl4->fl4_dport;  in udp_send_skb()
1110 	uh->len = htons(len);  in udp_send_skb()
1111 	uh->check = 0;  in udp_send_skb()
1155 	uh->check = csum_tcpudp_magic(fl4->saddr, fl4->daddr, len,  in udp_send_skb()
1157 	if (uh->check == 0)  in udp_send_skb()
1158 		uh->check = CSUM_MANGLED_0;  in udp_send_skb()
2457 				    struct udphdr  *uh,  in __udp4_lib_mcast_deliver()  argument
2462 	unsigned short hnum = ntohs(uh->dest);  in __udp4_lib_mcast_deliver()
2487 		if (!__udp_is_mcast_sock(net, sk, uh->dest, daddr,  in __udp4_lib_mcast_deliver()
2488 					 uh->source, saddr, dif, sdif, hnum))  in __udp4_lib_mcast_deliver()
2528 static inline int udp4_csum_init(struct sk_buff *skb, struct udphdr *uh)  in udp4_csum_init()  argument
2535 	err = (__force int)skb_checksum_init_zero_check(skb, IPPROTO_UDP, uh->check,  in udp4_csum_init()
2559 			       struct udphdr *uh)  in udp_unicast_rcv_skb()  argument
2563 	if (inet_get_convert_csum(sk) && uh->check)  in udp_unicast_rcv_skb()
2587 	struct udphdr *uh;  in udp_rcv()  local
2599 	uh   = udp_hdr(skb);  in udp_rcv()
2600 	ulen = ntohs(uh->len);  in udp_rcv()
2607 	if (ulen < sizeof(*uh))  in udp_rcv()
2614 		uh = udp_hdr(skb);  in udp_rcv()
2617 	if (udp4_csum_init(skb, uh))  in udp_rcv()
2620 	sk = inet_steal_sock(net, skb, sizeof(struct udphdr), saddr, uh->source, daddr, uh->dest,  in udp_rcv()
2632 		ret = udp_unicast_rcv_skb(sk, skb, uh);  in udp_rcv()
2639 		return __udp4_lib_mcast_deliver(net, skb, uh, saddr, daddr);  in udp_rcv()
2641 	sk = __udp4_lib_lookup_skb(skb, uh->source, uh->dest);  in udp_rcv()
2643 		return udp_unicast_rcv_skb(sk, skb, uh);  in udp_rcv()
2667 			    &saddr, ntohs(uh->source),  in udp_rcv()
2669 			    &daddr, ntohs(uh->dest));  in udp_rcv()
2679 			    &saddr, ntohs(uh->source), &daddr, ntohs(uh->dest),  in udp_rcv()
2757 	const struct udphdr *uh;  in udp_v4_early_demux()  local
2769 	uh = udp_hdr(skb);  in udp_v4_early_demux()
2782 		sk = __udp4_lib_mcast_demux_lookup(net, uh->dest, iph->daddr,  in udp_v4_early_demux()
2783 						   uh->source, iph->saddr,  in udp_v4_early_demux()
2786 		sk = __udp4_lib_demux_lookup(net, uh->dest, iph->daddr,  in udp_v4_early_demux()
2787 					     uh->source, iph->saddr, dif, sdif);  in udp_v4_early_demux()