net/ipv6/ip6_udp_tunnel.c

2 // SPDX-License-Identifier: GPL-2.0-only
6 #include <linux/udp.h>
10 #include <net/udp.h>
28 	if (cfg->ipv6_v6only) {  in udp_sock_create6()
29 		err = ip6_sock_set_v6only(sock->sk);  in udp_sock_create6()
33 	if (cfg->bind_ifindex) {  in udp_sock_create6()
34 		err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true);  in udp_sock_create6()
40 	memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,  in udp_sock_create6()
42 	udp6_addr.sin6_port = cfg->local_udp_port;  in udp_sock_create6()
48 	if (cfg->peer_udp_port) {  in udp_sock_create6()
51 		memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,  in udp_sock_create6()
53 		udp6_addr.sin6_port = cfg->peer_udp_port;  in udp_sock_create6()
61 	udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);  in udp_sock_create6()
62 	udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);  in udp_sock_create6()
92 	uh->dest = dst_port;  in udp_tunnel6_xmit_skb()
93 	uh->source = src_port;  in udp_tunnel6_xmit_skb()
95 	uh->len = htons(skb->len);  in udp_tunnel6_xmit_skb()
99 	udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);  in udp_tunnel6_xmit_skb()
105 	ip6h->payload_len = htons(skb->len);  in udp_tunnel6_xmit_skb()
106 	ip6h->nexthdr     = IPPROTO_UDP;  in udp_tunnel6_xmit_skb()
107 	ip6h->hop_limit   = ttl;  in udp_tunnel6_xmit_skb()
108 	ip6h->daddr	  = *daddr;  in udp_tunnel6_xmit_skb()
109 	ip6h->saddr	  = *saddr;  in udp_tunnel6_xmit_skb()
117  *      udp_tunnel6_dst_lookup - perform route lookup on UDP tunnel
125  *      @sport: UDP source port
126  *      @dport: UDP destination port
129  *      This function performs a route lookup on a UDP tunnel
156 	fl6.flowi6_mark = skb->mark;  in udp_tunnel6_dst_lookup()
159 	fl6.daddr = key->u.ipv6.dst;  in udp_tunnel6_dst_lookup()
160 	fl6.saddr = key->u.ipv6.src;  in udp_tunnel6_dst_lookup()
163 	fl6.flowlabel = ip6_make_flowinfo(dsfield, key->label);  in udp_tunnel6_dst_lookup()
165 	dst = ipv6_stub->ipv6_dst_lookup_flow(net, sock->sk, &fl6,  in udp_tunnel6_dst_lookup()
169 		return ERR_PTR(-ENETUNREACH);  in udp_tunnel6_dst_lookup()
171 	if (dst->dev == dev) { /* is this necessary? */  in udp_tunnel6_dst_lookup()
174 		return ERR_PTR(-ELOOP);  in udp_tunnel6_dst_lookup()
185 MODULE_DESCRIPTION("IPv6 Foo over UDP tunnel driver");