1 #include <linux/module.h>
2 #include <linux/errno.h>
3 #include <linux/socket.h>
5 #include <linux/types.h>
6 #include <linux/kernel.h>
9 #include <net/udp_tunnel.h>
10 #include <net/net_namespace.h>
11 #include <net/netns/generic.h>
12 #include <net/ip6_tunnel.h>
13 #include <net/ip6_checksum.h>
15 int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
16 struct socket **sockp)
18 struct sockaddr_in6 udp6_addr = {};
20 struct socket *sock = NULL;
22 err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock);
26 if (cfg->ipv6_v6only) {
29 err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
30 (char *) &val, sizeof(val));
34 if (cfg->bind_ifindex) {
35 err = kernel_setsockopt(sock, SOL_SOCKET, SO_BINDTOIFINDEX,
36 (void *)&cfg->bind_ifindex,
37 sizeof(cfg->bind_ifindex));
42 udp6_addr.sin6_family = AF_INET6;
43 memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
44 sizeof(udp6_addr.sin6_addr));
45 udp6_addr.sin6_port = cfg->local_udp_port;
46 err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
51 if (cfg->peer_udp_port) {
52 memset(&udp6_addr, 0, sizeof(udp6_addr));
53 udp6_addr.sin6_family = AF_INET6;
54 memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
55 sizeof(udp6_addr.sin6_addr));
56 udp6_addr.sin6_port = cfg->peer_udp_port;
57 err = kernel_connect(sock,
58 (struct sockaddr *)&udp6_addr,
59 sizeof(udp6_addr), 0);
64 udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
65 udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
72 kernel_sock_shutdown(sock, SHUT_RDWR);
78 EXPORT_SYMBOL_GPL(udp_sock_create6);
80 int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
82 struct net_device *dev, struct in6_addr *saddr,
83 struct in6_addr *daddr,
84 __u8 prio, __u8 ttl, __be32 label,
85 __be16 src_port, __be16 dst_port, bool nocheck)
90 __skb_push(skb, sizeof(*uh));
91 skb_reset_transport_header(skb);
95 uh->source = src_port;
97 uh->len = htons(skb->len);
99 skb_dst_set(skb, dst);
101 udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
103 __skb_push(skb, sizeof(*ip6h));
104 skb_reset_network_header(skb);
105 ip6h = ipv6_hdr(skb);
106 ip6_flow_hdr(ip6h, prio, label);
107 ip6h->payload_len = htons(skb->len);
108 ip6h->nexthdr = IPPROTO_UDP;
109 ip6h->hop_limit = ttl;
110 ip6h->daddr = *daddr;
111 ip6h->saddr = *saddr;
113 ip6tunnel_xmit(sk, skb, dev);
116 EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
118 MODULE_LICENSE("GPL");