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