linux/net/ipv6/ip6_udp_tunnel.c

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/socket.h>
#include <linux/udp.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/in6.h>
#include <net/udp.h>
#include <net/udp_tunnel.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/ip6_tunnel.h>
#include <net/ip6_checksum.h>

int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
		     struct socket **sockp)
{ … }
EXPORT_SYMBOL_GPL(…);

int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
			 struct sk_buff *skb,
			 struct net_device *dev,
			 const struct in6_addr *saddr,
			 const struct in6_addr *daddr,
			 __u8 prio, __u8 ttl, __be32 label,
			 __be16 src_port, __be16 dst_port, bool nocheck)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 *      udp_tunnel6_dst_lookup - perform route lookup on UDP tunnel
 *      @skb: Packet for which lookup is done
 *      @dev: Tunnel device
 *      @net: Network namespace of tunnel device
 *      @sock: Socket which provides route info
 *      @oif: Index of the output interface
 *      @saddr: Memory to store the src ip address
 *      @key: Tunnel information
 *      @sport: UDP source port
 *      @dport: UDP destination port
 *      @dsfield: The traffic class field
 *      @dst_cache: The dst cache to use for lookup
 *      This function performs a route lookup on a UDP tunnel
 *
 *      It returns a valid dst pointer and stores src address to be used in
 *      tunnel in param saddr on success, else a pointer encoded error code.
 */

struct dst_entry *udp_tunnel6_dst_lookup(struct sk_buff *skb,
					 struct net_device *dev,
					 struct net *net,
					 struct socket *sock,
					 int oif,
					 struct in6_addr *saddr,
					 const struct ip_tunnel_key *key,
					 __be16 sport, __be16 dport, u8 dsfield,
					 struct dst_cache *dst_cache)
{ … }
EXPORT_SYMBOL_GPL(…);

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;