#include <sys/socket.h>
#include <netinet/in.h>
#include <stdlib.h>
#include "parser.h"

// 8 octets min (struct pointer 4 octets), 1024 octets max 
typedef struct packet {
	unsigned char magic; // 95 (si autre, ignorer)
	unsigned char version; // 1 (si autre, ignorer)
	short length; // 1020 max
	char *body;
} packet;

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

// 2 octets min, 258 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;

// 20 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[16];
} 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[16];
} 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[16];
	char *data;
} node_state;

// 2 octets min, 258 ocets max (unsigned char 0 -> 255)
typedef struct warning {
	unsigned char type;
	unsigned char length;
	char *message;
} warning;

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;


// creer un tlv
int build_tlv(tlv *tlv, cmd_token token);

// creer un tlv specifique
int build_pad1(tlv *tlv);
int build_padn(tlv *tlv, size_t len);
int build_neighbour_req(tlv *tlv);
int build_neighbour(tlv *tlv, struct in6_addr ip, short seqno);
int build_network_hash(tlv *tlv, char *network_hash);
int build_network_state_req(tlv *tlv);
int build_node_hash(tlv *tlv, long node_id, short seqno, char *node_hash);
int build_node_state_req(tlv *tlv, long node_id);
int build_node_state(tlv *tlv, long node_id, short seqno, char *node_hash, char *data);
int build_warning(tlv *tlv, char *message);