ip6_udp_tunnel.c revision fd384412e199b62c3ddaabd18dce86d0e164c5b9 
1#include <linux/module.h>
2#include <linux/errno.h>
3#include <linux/socket.h>
4#include <linux/udp.h>
5#include <linux/types.h>
6#include <linux/kernel.h>
7#include <linux/in6.h>
8#include <net/udp.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>
14
15int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
16		     struct socket **sockp)
17{
18	struct sockaddr_in6 udp6_addr;
19	int err;
20	struct socket *sock = NULL;
21
22	err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock);
23	if (err < 0)
24		goto error;
25
26	sk_change_net(sock->sk, net);
27
28	udp6_addr.sin6_family = AF_INET6;
29	memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
30	       sizeof(udp6_addr.sin6_addr));
31	udp6_addr.sin6_port = cfg->local_udp_port;
32	err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
33			  sizeof(udp6_addr));
34	if (err < 0)
35		goto error;
36
37	if (cfg->peer_udp_port) {
38		udp6_addr.sin6_family = AF_INET6;
39		memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
40		       sizeof(udp6_addr.sin6_addr));
41		udp6_addr.sin6_port = cfg->peer_udp_port;
42		err = kernel_connect(sock,
43				     (struct sockaddr *)&udp6_addr,
44				     sizeof(udp6_addr), 0);
45	}
46	if (err < 0)
47		goto error;
48
49	udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
50	udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
51
52	*sockp = sock;
53	return 0;
54
55error:
56	if (sock) {
57		kernel_sock_shutdown(sock, SHUT_RDWR);
58		sk_release_kernel(sock->sk);
59	}
60	*sockp = NULL;
61	return err;
62}
63EXPORT_SYMBOL_GPL(udp_sock_create6);
64