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 struct net_device *dev;
37 dev = dev_get_by_index(net, cfg->bind_ifindex);
43 err = kernel_setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE,
44 dev->name, strlen(dev->name) + 1);
51 udp6_addr.sin6_family = AF_INET6;
52 memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
53 sizeof(udp6_addr.sin6_addr));
54 udp6_addr.sin6_port = cfg->local_udp_port;
55 err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
60 if (cfg->peer_udp_port) {
61 memset(&udp6_addr, 0, sizeof(udp6_addr));
62 udp6_addr.sin6_family = AF_INET6;
63 memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
64 sizeof(udp6_addr.sin6_addr));
65 udp6_addr.sin6_port = cfg->peer_udp_port;
66 err = kernel_connect(sock,
67 (struct sockaddr *)&udp6_addr,
68 sizeof(udp6_addr), 0);
73 udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
74 udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
81 kernel_sock_shutdown(sock, SHUT_RDWR);
87 EXPORT_SYMBOL_GPL(udp_sock_create6);
89 int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
91 struct net_device *dev, struct in6_addr *saddr,
92 struct in6_addr *daddr,
93 __u8 prio, __u8 ttl, __be32 label,
94 __be16 src_port, __be16 dst_port, bool nocheck)
99 __skb_push(skb, sizeof(*uh));
100 skb_reset_transport_header(skb);
104 uh->source = src_port;
106 uh->len = htons(skb->len);
108 skb_dst_set(skb, dst);
110 udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
112 __skb_push(skb, sizeof(*ip6h));
113 skb_reset_network_header(skb);
114 ip6h = ipv6_hdr(skb);
115 ip6_flow_hdr(ip6h, prio, label);
116 ip6h->payload_len = htons(skb->len);
117 ip6h->nexthdr = IPPROTO_UDP;
118 ip6h->hop_limit = ttl;
119 ip6h->daddr = *daddr;
120 ip6h->saddr = *saddr;
122 ip6tunnel_xmit(sk, skb, dev);
125 EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
127 MODULE_LICENSE("GPL");