#include <sys/socket.h>
#include <netinet/in.h>

typedef union tlv {
	pad1 *pad1;
	padn *padn;
	neighbour_req *neighbour_req;
	neighbour *neighbour;
	network_hash *network_hash;
	network_state_req *network_state_req;
	node_hash *node_hash;
	node_state_req *node_state_req;
	node_state *node_state;
	warning *warning;
} tlv;


// 1 octet
typedef struct pad1 {
	unsigned unsigned char type;
} pad1;

// 2 octets min, 257 octets max (unsigned char 0 -> 255)
typedef struct padn {
	unsigned char type;
	unsigned char length;
	char *mbz;
} padn;

// 2 octets
typedef struct neighbour_req {
	unsigned char type;
	unsigned char length;
} neighbour_req;

// 132 octets
typedef struct neighbour {
	unsigned char type;
	unsigned char length;
	struct in6_addr ip;
	short port;
} neighbour;

// 18 octets
typedef struct network_hash {
	unsigned char type;
	unsigned char length;
	char *network_hash;
} network_hash;

// 2 octets
typedef struct network_state_req {
	unsigned char type;
	unsigned char length;
} network_state_req;

// 28 octets
typedef struct node_hash {
	unsigned char type;
	unsigned char length;
	long node_id;
	short seqno;
	char *node_hash;
} node_hash;

// 10 octets
typedef struct node_state_req {
	unsigned char type;
	unsigned char length;
	long node_id;
} node_state_req;

// 28 octets min, 220 octets max (data 0 -> 192)
typedef struct node_state {
	unsigned char type;
	unsigned char length;
	long node_id;
	short seqno;
	char *node_hash;
	char *data;
} node_state;

// 2 octets min, 257 ocets max (unsigned char 0 -> 255)
typedef struct warning {
	unsigned char type;
	unsigned char length;
	char *message;
} warning;