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#ifndef __NET_UDP_TUNNEL_WRAPPER_H
#define __NET_UDP_TUNNEL_WRAPPER_H
#include <linux/version.h>
#include <linux/kconfig.h>
#include <net/addrconf.h>
#include <net/dst_metadata.h>
#include <linux/netdev_features.h>
#ifdef USE_UPSTREAM_TUNNEL
#include_next <net/udp_tunnel.h>
#else
#include <net/ip_tunnels.h>
#include <net/udp.h>
struct udp_port_cfg {
u8 family;
/* Used only for kernel-created sockets */
union {
struct in_addr local_ip;
#if IS_ENABLED(CONFIG_IPV6)
struct in6_addr local_ip6;
#endif
};
union {
struct in_addr peer_ip;
#if IS_ENABLED(CONFIG_IPV6)
struct in6_addr peer_ip6;
#endif
};
__be16 local_udp_port;
__be16 peer_udp_port;
unsigned int use_udp_checksums:1,
use_udp6_tx_checksums:1,
use_udp6_rx_checksums:1,
ipv6_v6only:1;
};
#define udp_sock_create4 rpl_udp_sock_create4
int rpl_udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp);
#define udp_sock_create6 rpl_udp_sock_create6
#if IS_ENABLED(CONFIG_IPV6)
int rpl_udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp);
#else
static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp)
{
return -EPFNOSUPPORT;
}
#endif
#define udp_sock_create rpl_udp_sock_create
static inline int udp_sock_create(struct net *net,
struct udp_port_cfg *cfg,
struct socket **sockp)
{
if (cfg->family == AF_INET)
return udp_sock_create4(net, cfg, sockp);
if (cfg->family == AF_INET6)
return udp_sock_create6(net, cfg, sockp);
return -EPFNOSUPPORT;
}
typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb);
typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk);
typedef struct sk_buff **(*udp_tunnel_gro_receive_t)(struct sock *sk,
struct sk_buff **head,
struct sk_buff *skb);
typedef int (*udp_tunnel_gro_complete_t)(struct sock *sk, struct sk_buff *skb,
int nhoff);
struct udp_tunnel_sock_cfg {
void *sk_user_data; /* user data used by encap_rcv call back */
/* Used for setting up udp_sock fields, see udp.h for details */
__u8 encap_type;
udp_tunnel_encap_rcv_t encap_rcv;
udp_tunnel_encap_destroy_t encap_destroy;
#ifdef HAVE_UDP_TUNNEL_SOCK_CFG_GRO_RECEIVE
udp_tunnel_gro_receive_t gro_receive;
udp_tunnel_gro_complete_t gro_complete;
#endif
};
/* Setup the given (UDP) sock to receive UDP encapsulated packets */
#define setup_udp_tunnel_sock rpl_setup_udp_tunnel_sock
void rpl_setup_udp_tunnel_sock(struct net *net, struct socket *sock,
struct udp_tunnel_sock_cfg *sock_cfg);
/* Transmit the skb using UDP encapsulation. */
#define udp_tunnel_xmit_skb rpl_udp_tunnel_xmit_skb
void rpl_udp_tunnel_xmit_skb(struct rtable *rt,
struct sock *sk, struct sk_buff *skb,
__be32 src, __be32 dst, __u8 tos, __u8 ttl,
__be16 df, __be16 src_port, __be16 dst_port,
bool xnet, bool nocheck);
#define udp_tunnel_sock_release rpl_udp_tunnel_sock_release
void rpl_udp_tunnel_sock_release(struct socket *sock);
#define udp_tunnel_encap_enable rpl_udp_tunnel_encap_enable
static inline void udp_tunnel_encap_enable(struct socket *sock)
{
#if IS_ENABLED(CONFIG_IPV6)
if (sock->sk->sk_family == PF_INET6)
#ifdef HAVE_IPV6_STUB
ipv6_stub->udpv6_encap_enable();
#else
udpv6_encap_enable();
#endif
else
#endif
udp_encap_enable();
}
#if IS_ENABLED(CONFIG_IPV6)
#define udp_tunnel6_xmit_skb rpl_udp_tunnel6_xmit_skb
int rpl_udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb,
struct net_device *dev, struct in6_addr *saddr,
struct in6_addr *daddr,
__u8 prio, __u8 ttl, __be32 label, __be16 src_port,
__be16 dst_port, bool nocheck);
#endif
static inline void udp_tunnel_gro_complete(struct sk_buff *skb, int nhoff)
{
struct udphdr *uh;
uh = (struct udphdr *)(skb->data + nhoff - sizeof(struct udphdr));
skb_shinfo(skb)->gso_type |= uh->check ?
SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
}
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,7,0)
/* this is to handle the return type change in handle-offload
* functions.
*/
static inline int
rpl_udp_tunnel_handle_offloads(struct sk_buff *skb, bool udp_csum,
bool is_vxlan)
{
if (skb_is_gso(skb) && skb_is_encapsulated(skb)) {
return -ENOSYS;
}
return udp_tunnel_handle_offloads(skb, udp_csum);
}
#else
void ovs_udp_gso(struct sk_buff *skb);
void ovs_udp_csum_gso(struct sk_buff *skb);
static inline int rpl_udp_tunnel_handle_offloads(struct sk_buff *skb,
bool udp_csum,
bool is_vxlan)
{
int type = 0;
void (*fix_segment)(struct sk_buff *);
if (skb_is_gso(skb) && skb_is_encapsulated(skb)) {
return -ENOSYS;
}
type |= udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
if (!udp_csum)
fix_segment = ovs_udp_gso;
else
fix_segment = ovs_udp_csum_gso;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
if (!is_vxlan)
type = 0;
#endif
return ovs_iptunnel_handle_offloads(skb, udp_csum, type, fix_segment);
}
#endif
#define udp_tunnel_handle_offloads rpl_udp_tunnel_handle_offloads
static inline void ovs_udp_tun_rx_dst(struct ip_tunnel_info *info,
struct sk_buff *skb,
unsigned short family,
__be16 flags, __be64 tunnel_id, int md_size)
{
if (family == AF_INET)
ovs_ip_tun_rx_dst(info, skb, flags, tunnel_id, md_size);
else
ovs_ipv6_tun_rx_dst(info, skb, flags, tunnel_id, md_size);
info->key.tp_src = udp_hdr(skb)->source;
info->key.tp_dst = udp_hdr(skb)->dest;
if (udp_hdr(skb)->check)
info->key.tun_flags |= TUNNEL_CSUM;
}
#endif
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