nat64-platform.h File Reference

NAT64 platform interface — socket-based. More...

#include <stdbool.h>
#include <stdint.h>
#include "net/ipv6/uip.h"
#include "sys/timer.h"

Go to the source code of this file.

Data Structures
struct	nat64_session
	A NAT64 session binding an IoT node's IPv6 flow to an IPv4 socket. More...

Enumerations
enum	nat64_session_proto
	Transport protocol tracked by a NAT64 session. More...
enum	nat64_tcp_state { NAT64_TCP_CONNECTING , NAT64_TCP_ESTABLISHED , NAT64_TCP_CLOSING }
	TCP connection state within the NAT64 splice proxy. More...

Functions
bool	nat64_platform_init (void)
	Initialize the platform layer.
bool	nat64_is_enabled (void)
	Check whether the NAT64 gateway has been enabled at runtime.
int	nat64_platform_udp_send (const uip_ip4addr_t *dst, uint16_t dstport, const uip_ip6addr_t *ip6_src, uint16_t srcport, const uint8_t *payload, uint16_t len)
	Forward a UDP payload to an IPv4 server.
struct nat64_session *	nat64_platform_tcp_connect (const uip_ip4addr_t *dst, uint16_t dstport, const uip_ip6addr_t *ip6_src, uint16_t srcport, uint32_t peer_isn)
	Initiate a TCP connection to an IPv4 server.
int	nat64_platform_tcp_send (struct nat64_session *s, const uint8_t *data, uint16_t len)
	Send data on an established TCP session.
void	nat64_platform_tcp_close (struct nat64_session *s)
	Half-close a TCP session (send FIN).
void	nat64_platform_tcp_destroy (struct nat64_session *s)
	Fully tear down a TCP session.
void	nat64_platform_tcp_abort (struct nat64_session *s)
	Abort a TCP session by sending RST upstream.
int	nat64_platform_icmp_send (const uip_ip4addr_t *dst, const uip_ip6addr_t *ip6_src, uint16_t identifier, const uint8_t *icmp_pkt, uint16_t icmp_len)
	Forward an ICMPv4 Echo Request to an IPv4 destination.

Detailed Description

NAT64 platform interface — socket-based.

Defines the session structure shared between the protocol-agnostic core and the platform layer, plus the small set of "send to IPv4" entry points the core invokes to forward packets out. The session struct is exposed (rather than opaque) so that nat64.c and nat64-tcp.c can read the address/port fields directly without accessor overhead, while the platform layer remains the sole owner of the file descriptor and connection state.

Author

Nicolas Tsiftes nicol.nosp@m.as.t.nosp@m.sifte.nosp@m.s@ri.nosp@m..se

Definition in file nat64-platform.h.