libchat6/inc/lc6_common.h

#ifndef LC6_COMMON_H
#define LC6_COMMON_H

#include <pthread.h>
#include <sys/param.h>
#include <arpa/inet.h>
#include <sodium.h>

#include "../inc/libchat6.h"
#include "../inc/lc6_helpers.h"

#ifdef LC6_DEBUG
#include "../inc/lc6_debug.h"
#endif

#define LC6_CRYPTO_HASHLEN crypto_generichash_BYTES
#define LC6_CRYPTO_HASHSIGNLEN (crypto_secretbox_NONCEBYTES+crypto_box_MACBYTES+crypto_generichash_BYTES)
#define LC6_CRYPTO_PUBLEN crypto_kx_PUBLICKEYBYTES
#define LC6_CRYPTO_PRIVLEN crypto_kx_SECRETKEYBYTES
#define LC6_CRYPTO_RXLEN crypto_kx_SESSIONKEYBYTES
#define LC6_CRYPTO_TXLEN crypto_kx_SESSIONKEYBYTES

#define LC6_EVENT_MAXPEERS_OUT 5
#define LC6_EVENT_MAXPEERS_IN  5

typedef struct LC6_NODE {
	unsigned char *pub_key;
	unsigned char *priv_key;
} LC6_NODE;

typedef struct LC6_PEER {
	int sock;
	LC6_NODE keys;
	unsigned char bufi[65536];
	unsigned char bufo[65536];
} LC6_PEER;

typedef struct LC6_USER {
	struct LC6_USER *prev;
	struct LC6_USER *next;
	unsigned char nickname[256];
	unsigned char pub_key[LC6_CRYPTO_PUBLEN];
	unsigned char priv_key[LC6_CRYPTO_PRIVLEN];
	uint8_t status;
} LC6_USER;

typedef struct LC6_FRIEND {
	struct LC6_FRIEND *prev;
	struct LC6_FRIEND *next;
	unsigned char nickname[256];
	unsigned char pub_key[LC6_CRYPTO_PUBLEN];
	unsigned char key_rx[LC6_CRYPTO_RXLEN];
	unsigned char key_tx[LC6_CRYPTO_TXLEN];
	uint8_t status;
} LC6_FRIEND;

typedef struct LC6_MSG_TLV {
	int type;
	int length;
	unsigned char *value;
} LC6_MSG_TLV;

typedef struct LC6_MSG {
	uint64_t timestamp;
	int type;
	LC6_MSG_TLV **tlv;
} LC6_MSG;

enum LC6_MSG_TYPE_ENUM {
	LC6_MSG_TYPE_CLIENT_ONLINE,
	LC6_MSG_TYPE_CLIENT_UPDATE,
	LC6_MSG_TYPE_CLIENT_OFFLINE,
	LC6_MSG_TYPE_KEEPALIVE_REQUEST,
	LC6_MSG_TYPE_KEEPALIVE_RESPONSE,
	LC6_MSG_TYPE_FRIEND_REQUEST,
	LC6_MSG_TYPE_FRIEND_RESPONSE,
	LC6_MSG_TYPE_MESSAGE_SEND,
	LC6_MSG_TYPE_MESSAGE_RECV,
	LC6_MSG_TYPE_MESSAGE_READ,
	LC6_MSG_TYPE_NEIGHBOURS_REQUEST,
	LC6_MSG_TYPE_NEIGHBOURS_RESPONSE
};

enum LC6_MSG_TLV_ENUM {
	LC6_MSG_TLV_NICKNAME,
	LC6_MSG_TLV_KEY,
	LC6_MSG_TLV_NONCE,
	LC6_MSG_TLV_ICON,
	LC6_MSG_TLV_METRIC,
	LC6_MSG_TLV_MSGID,
	LC6_MSG_TLV_CHATID,
	LC6_MSG_TLV_NEIGHBOUR
};

enum LC6_MSG_TLV_TYPE_ENUM {
	LC6_MSG_TLV_TYPE_UTF8,
	LC6_MSG_TLV_TYPE_BINARY,
	LC6_MSG_TLV_TYPE_INTEGER,
	LC6_MSG_TLV_TYPE_UUID,
	LC6_MSG_TLV_TYPE_IPPORT
};
	

#define LC6_CONFIG_BOOTSTRAP "bootstrap.bin"
#define LC6_CONFIG_USER      "user.bin"
#define LC6_CONFIG_FRIEND    "friends.bin"
#define LC6_CONFIG_MAXLEN    50

typedef struct LC6_IPADDR {
	uint8_t af;
	union addr {
		uint32_t inet;
		unsigned char inet6[16];
	} addr;
} LC6_IPADDR;

typedef struct LC6_BOOTSTRAP {
	struct LC6_BOOTSTRAP *prev;
	struct LC6_BOOTSTRAP *next;
	uint64_t last_contact;
	uint8_t  hardcoded;
	LC6_IPADDR ip;
} LC6_BOOTSTRAP;

typedef struct LC6_CTX {
	char path[MAXPATHLEN-LC6_CONFIG_MAXLEN];
	LIBCHAT_CB *callback;
	LC6_USER *user;
	LC6_NODE *node;
	LC6_FRIEND *friend;
	LC6_BOOTSTRAP *bootstrap;
	pthread_t ev_thread;
} LC6_CTX;

extern int LC6_MSG_TLV_TYPE_INT[8];
extern unsigned char LC6_MSG_TYPE_STR[13][30];
extern unsigned char LC6_MSG_TLV_STR[8][20];

#endif