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 udp6_addr.sin6_family = AF_INET6;
46 memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
47 sizeof(udp6_addr.sin6_addr));
48 udp6_addr.sin6_port = cfg->peer_udp_port;
49 err = kernel_connect(sock,
50 (struct sockaddr *)&udp6_addr,
51 sizeof(udp6_addr), 0);
56 udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
57 udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
64 kernel_sock_shutdown(sock, SHUT_RDWR);
70 EXPORT_SYMBOL_GPL(udp_sock_create6);
72 int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
74 struct net_device *dev, struct in6_addr *saddr,
75 struct in6_addr *daddr,
76 __u8 prio, __u8 ttl, __be32 label,
77 __be16 src_port, __be16 dst_port, bool nocheck)
82 __skb_push(skb, sizeof(*uh));
83 skb_reset_transport_header(skb);
87 uh->source = src_port;
89 uh->len = htons(skb->len);
91 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
92 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
94 skb_dst_set(skb, dst);
96 udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
98 __skb_push(skb, sizeof(*ip6h));
99 skb_reset_network_header(skb);
100 ip6h = ipv6_hdr(skb);
101 ip6_flow_hdr(ip6h, prio, label);
102 ip6h->payload_len = htons(skb->len);
103 ip6h->nexthdr = IPPROTO_UDP;
104 ip6h->hop_limit = ttl;
105 ip6h->daddr = *daddr;
106 ip6h->saddr = *saddr;
108 ip6tunnel_xmit(sk, skb, dev);
111 EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
113 MODULE_LICENSE("GPL");