660 					 struct udphdr *uh,  in __udp4_lib_err_encap()  argument
688 	sk = __udp4_lib_lookup(net, iph->daddr, uh->source,  in __udp4_lib_err_encap()
689 			       iph->saddr, uh->dest, skb->dev->ifindex, 0,  in __udp4_lib_err_encap()
724 	struct udphdr *uh = (struct udphdr *)(skb->data+(iph->ihl<<2));  in __udp4_lib_err()  local
733 	sk = __udp4_lib_lookup(net, iph->daddr, uh->dest,  in __udp4_lib_err()
734 			       iph->saddr, uh->source, skb->dev->ifindex,  in __udp4_lib_err()
740 			sk = __udp4_lib_err_encap(net, iph, uh, udptable, sk, skb,  in __udp4_lib_err()
798 			udp_sk(sk)->encap_err_rcv(sk, skb, err, uh->dest, info,  in __udp4_lib_err()
799 						  (u8 *)(uh+1));  in __udp4_lib_err()
806 		ip_icmp_error(sk, skb, err, uh->dest, info, (u8 *)(uh+1));  in __udp4_lib_err()
843 	struct udphdr *uh = udp_hdr(skb);  in udp4_hwcsum()  local
855 		uh->check = ~csum_tcpudp_magic(src, dst, len,  in udp4_hwcsum()
873 		uh->check = csum_tcpudp_magic(src, dst, len, IPPROTO_UDP, csum);  in udp4_hwcsum()
874 		if (uh->check == 0)  in udp4_hwcsum()
875 			uh->check = CSUM_MANGLED_0;  in udp4_hwcsum()
886 	struct udphdr *uh = udp_hdr(skb);  in udp_set_csum()  local
889 		uh->check = 0;  in udp_set_csum()
891 		uh->check = ~udp_v4_check(len, saddr, daddr, 0);  in udp_set_csum()
893 		uh->check = 0;  in udp_set_csum()
894 		uh->check = udp_v4_check(len, saddr, daddr, lco_csum(skb));  in udp_set_csum()
895 		if (uh->check == 0)  in udp_set_csum()
896 			uh->check = CSUM_MANGLED_0;  in udp_set_csum()
901 		uh->check = ~udp_v4_check(len, saddr, daddr, 0);  in udp_set_csum()
911 	struct udphdr *uh;  in udp_send_skb()  local
916 	int datalen = len - sizeof(*uh);  in udp_send_skb()
922 	uh = udp_hdr(skb);  in udp_send_skb()
923 	uh->source = inet->inet_sport;  in udp_send_skb()
924 	uh->dest = fl4->fl4_dport;  in udp_send_skb()
925 	uh->len = htons(len);  in udp_send_skb()
926 	uh->check = 0;  in udp_send_skb()
976 	uh->check = csum_tcpudp_magic(fl4->saddr, fl4->daddr, len,  in udp_send_skb()
978 	if (uh->check == 0)  in udp_send_skb()
979 		uh->check = CSUM_MANGLED_0;  in udp_send_skb()
2249 				    struct udphdr  *uh,  in __udp4_lib_mcast_deliver()  argument
2255 	unsigned short hnum = ntohs(uh->dest);  in __udp4_lib_mcast_deliver()
2274 		if (!__udp_is_mcast_sock(net, sk, uh->dest, daddr,  in __udp4_lib_mcast_deliver()
2275 					 uh->source, saddr, dif, sdif, hnum))  in __udp4_lib_mcast_deliver()
2318 static inline int udp4_csum_init(struct sk_buff *skb, struct udphdr *uh,  in udp4_csum_init()  argument
2327 		err = udplite_checksum_init(skb, uh);  in udp4_csum_init()
2340 	err = (__force int)skb_checksum_init_zero_check(skb, proto, uh->check,  in udp4_csum_init()
2364 			       struct udphdr *uh)  in udp_unicast_rcv_skb()  argument
2368 	if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk))  in udp_unicast_rcv_skb()
2389 	struct udphdr *uh;  in __udp4_lib_rcv()  local
2405 	uh   = udp_hdr(skb);  in __udp4_lib_rcv()
2406 	ulen = ntohs(uh->len);  in __udp4_lib_rcv()
2415 		if (ulen < sizeof(*uh) || pskb_trim_rcsum(skb, ulen))  in __udp4_lib_rcv()
2417 		uh = udp_hdr(skb);  in __udp4_lib_rcv()
2420 	if (udp4_csum_init(skb, uh, proto))  in __udp4_lib_rcv()
2423 	sk = inet_steal_sock(net, skb, sizeof(struct udphdr), saddr, uh->source, daddr, uh->dest,  in __udp4_lib_rcv()
2435 		ret = udp_unicast_rcv_skb(sk, skb, uh);  in __udp4_lib_rcv()
2442 		return __udp4_lib_mcast_deliver(net, skb, uh,  in __udp4_lib_rcv()
2445 	sk = __udp4_lib_lookup_skb(skb, uh->source, uh->dest, udptable);  in __udp4_lib_rcv()
2447 		return udp_unicast_rcv_skb(sk, skb, uh);  in __udp4_lib_rcv()
2472 			    &saddr, ntohs(uh->source),  in __udp4_lib_rcv()
2474 			    &daddr, ntohs(uh->dest));  in __udp4_lib_rcv()
2485 			    &saddr, ntohs(uh->source), &daddr, ntohs(uh->dest),  in __udp4_lib_rcv()
2564 	const struct udphdr *uh;  in udp_v4_early_demux()  local
2576 	uh = udp_hdr(skb);  in udp_v4_early_demux()
2589 		sk = __udp4_lib_mcast_demux_lookup(net, uh->dest, iph->daddr,  in udp_v4_early_demux()
2590 						   uh->source, iph->saddr,  in udp_v4_early_demux()
2593 		sk = __udp4_lib_demux_lookup(net, uh->dest, iph->daddr,  in udp_v4_early_demux()
2594 					     uh->source, iph->saddr, dif, sdif);  in udp_v4_early_demux()