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));
35 udp6_addr.sin6_family = AF_INET6;
36 memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
37 sizeof(udp6_addr.sin6_addr));
38 udp6_addr.sin6_port = cfg->local_udp_port;
39 err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
44 if (cfg->peer_udp_port) {
45 memset(&udp6_addr, 0, sizeof(udp6_addr));
46 udp6_addr.sin6_family = AF_INET6;
47 memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
48 sizeof(udp6_addr.sin6_addr));
49 udp6_addr.sin6_port = cfg->peer_udp_port;
50 err = kernel_connect(sock,
51 (struct sockaddr *)&udp6_addr,
52 sizeof(udp6_addr), 0);
57 udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
58 udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
65 kernel_sock_shutdown(sock, SHUT_RDWR);
71 EXPORT_SYMBOL_GPL(udp_sock_create6);
73 int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
75 struct net_device *dev, struct in6_addr *saddr,
76 struct in6_addr *daddr,
77 __u8 prio, __u8 ttl, __be32 label,
78 __be16 src_port, __be16 dst_port, bool nocheck)
83 __skb_push(skb, sizeof(*uh));
84 skb_reset_transport_header(skb);
88 uh->source = src_port;
90 uh->len = htons(skb->len);
92 skb_dst_set(skb, dst);
94 udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
96 __skb_push(skb, sizeof(*ip6h));
97 skb_reset_network_header(skb);
99 ip6_flow_hdr(ip6h, prio, label);
100 ip6h->payload_len = htons(skb->len);
101 ip6h->nexthdr = IPPROTO_UDP;
102 ip6h->hop_limit = ttl;
103 ip6h->daddr = *daddr;
104 ip6h->saddr = *saddr;
106 ip6tunnel_xmit(sk, skb, dev);
109 EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
111 MODULE_LICENSE("GPL");