NAT64 socket-based IPv4 forwarding for the native platform. More...

#include "contiki.h"
#include "nat64.h"
#include "nat64-platform.h"
#include "nat64-tcp.h"
#include "sys/platform.h"
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#include "sys/log.h"

Functions
static uint8_t	errno_to_icmp6_code (int err)
	Map a Linux errno to an ICMPv6 Destination Unreachable code.

static void	expire_session (struct nat64_session *s)
	Reap an expired session, notifying its peer if applicable.

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.

bool	nat64_platform_init (void)
	Initialize the platform layer.

bool	nat64_is_enabled (void)
	Check whether the NAT64 gateway has been enabled at runtime.

Detailed Description

NAT64 socket-based IPv4 forwarding for the native platform.

Implements the platform layer (nat64-platform.h) using BSD sockets on Linux/macOS. Each NAT64 session owns one non-blocking socket (UDP, TCP, or unprivileged ICMP) that is registered with the native main-loop select callback. Inbound data is delivered to the protocol-agnostic core via nat64_udp_input / nat64_tcp_data_in / nat64_icmp_input, and socket-level errors are translated into ICMPv6 Destination Unreachable codes returned to the IoT node.

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

Definition in file nat64-sock.c.

Functions

Detailed Description