584 					 struct udphdr *uh,  in __udp4_lib_err_encap()  argument
600 	sk = __udp4_lib_lookup(net, iph->daddr, uh->source,  in __udp4_lib_err_encap()
601 			       iph->saddr, uh->dest, skb->dev->ifindex, 0,  in __udp4_lib_err_encap()
636 	struct udphdr *uh = (struct udphdr *)(skb->data+(iph->ihl<<2));  in __udp4_lib_err()  local
645 	sk = __udp4_lib_lookup(net, iph->daddr, uh->dest,  in __udp4_lib_err()
646 			       iph->saddr, uh->source, skb->dev->ifindex,  in __udp4_lib_err()
652 			sk = __udp4_lib_err_encap(net, iph, uh, udptable, skb,  in __udp4_lib_err()
714 		ip_icmp_error(sk, skb, err, uh->dest, info, (u8 *)(uh+1));  in __udp4_lib_err()
751 	struct udphdr *uh = udp_hdr(skb);  in udp4_hwcsum()  local
763 		uh->check = ~csum_tcpudp_magic(src, dst, len,  in udp4_hwcsum()
781 		uh->check = csum_tcpudp_magic(src, dst, len, IPPROTO_UDP, csum);  in udp4_hwcsum()
782 		if (uh->check == 0)  in udp4_hwcsum()
783 			uh->check = CSUM_MANGLED_0;  in udp4_hwcsum()
794 	struct udphdr *uh = udp_hdr(skb);  in udp_set_csum()  local
797 		uh->check = 0;  in udp_set_csum()
799 		uh->check = ~udp_v4_check(len, saddr, daddr, 0);  in udp_set_csum()
801 		uh->check = 0;  in udp_set_csum()
802 		uh->check = udp_v4_check(len, saddr, daddr, lco_csum(skb));  in udp_set_csum()
803 		if (uh->check == 0)  in udp_set_csum()
804 			uh->check = CSUM_MANGLED_0;  in udp_set_csum()
809 		uh->check = ~udp_v4_check(len, saddr, daddr, 0);  in udp_set_csum()
819 	struct udphdr *uh;  in udp_send_skb()  local
824 	int datalen = len - sizeof(*uh);  in udp_send_skb()
830 	uh = udp_hdr(skb);  in udp_send_skb()
831 	uh->source = inet->inet_sport;  in udp_send_skb()
832 	uh->dest = fl4->fl4_dport;  in udp_send_skb()
833 	uh->len = htons(len);  in udp_send_skb()
834 	uh->check = 0;  in udp_send_skb()
885 	uh->check = csum_tcpudp_magic(fl4->saddr, fl4->daddr, len,  in udp_send_skb()
887 	if (uh->check == 0)  in udp_send_skb()
888 		uh->check = CSUM_MANGLED_0;  in udp_send_skb()
2139 				    struct udphdr  *uh,  in __udp4_lib_mcast_deliver()  argument
2145 	unsigned short hnum = ntohs(uh->dest);  in __udp4_lib_mcast_deliver()
2164 		if (!__udp_is_mcast_sock(net, sk, uh->dest, daddr,  in __udp4_lib_mcast_deliver()
2165 					 uh->source, saddr, dif, sdif, hnum))  in __udp4_lib_mcast_deliver()
2208 static inline int udp4_csum_init(struct sk_buff *skb, struct udphdr *uh,  in udp4_csum_init()  argument
2217 		err = udplite_checksum_init(skb, uh);  in udp4_csum_init()
2230 	err = (__force int)skb_checksum_init_zero_check(skb, proto, uh->check,  in udp4_csum_init()
2254 			       struct udphdr *uh)  in udp_unicast_rcv_skb()  argument
2258 	if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk))  in udp_unicast_rcv_skb()
2279 	struct udphdr *uh;  in __udp4_lib_rcv()  local
2291 	uh   = udp_hdr(skb);  in __udp4_lib_rcv()
2292 	ulen = ntohs(uh->len);  in __udp4_lib_rcv()
2301 		if (ulen < sizeof(*uh) || pskb_trim_rcsum(skb, ulen))  in __udp4_lib_rcv()
2303 		uh = udp_hdr(skb);  in __udp4_lib_rcv()
2306 	if (udp4_csum_init(skb, uh, proto))  in __udp4_lib_rcv()
2317 		ret = udp_unicast_rcv_skb(sk, skb, uh);  in __udp4_lib_rcv()
2323 		return __udp4_lib_mcast_deliver(net, skb, uh,  in __udp4_lib_rcv()
2326 	sk = __udp4_lib_lookup_skb(skb, uh->source, uh->dest, udptable);  in __udp4_lib_rcv()
2328 		return udp_unicast_rcv_skb(sk, skb, uh);  in __udp4_lib_rcv()
2351 			    &saddr, ntohs(uh->source),  in __udp4_lib_rcv()
2353 			    &daddr, ntohs(uh->dest));  in __udp4_lib_rcv()
2363 			    &saddr, ntohs(uh->source), &daddr, ntohs(uh->dest),  in __udp4_lib_rcv()
2434 	const struct udphdr *uh;  in udp_v4_early_demux()  local
2446 	uh = udp_hdr(skb);  in udp_v4_early_demux()
2459 		sk = __udp4_lib_mcast_demux_lookup(net, uh->dest, iph->daddr,  in udp_v4_early_demux()
2460 						   uh->source, iph->saddr,  in udp_v4_early_demux()
2463 		sk = __udp4_lib_demux_lookup(net, uh->dest, iph->daddr,  in udp_v4_early_demux()
2464 					     uh->source, iph->saddr, dif, sdif);  in udp_v4_early_demux()