/**
* Handle a connection attempt from a player :
* - check the crc
* - check server/user password (TODO)
* - check if the player is already connected (TODO)
* - initialize the player, add it to the pool
* - notify the player if he has been accepted (or not TODO)
* - notify the other players (TODO)
* - move the player to the default channel (TODO)
*
* @param data the connection packet
* @param len the length of the connection packet
* @param cli_addr the adress of the client
* @param cli_len the length of cli_addr
*/
void handle_player_connect(char *data, unsigned int len, struct sockaddr_in *cli_addr, unsigned int cli_len, struct server *s)
{
struct player *pl, *tmp_pl;
char password[30];
char login[30];
struct registration *r;
size_t iter;
/* Check crc */
if (!packet_check_crc(data, len, 16))
return;
/* Check if the IP is banned */
if (get_ban_by_ip(s, cli_addr->sin_addr) != NULL) {
server_refuse_connection_ban(cli_addr, cli_len, s);
logger(LOG_INFO, "PLAYER BANNED TRIED TO CONNECT");
return;
}
/* If registered, check if player exists, else check server password */
bzero(password, 30 * sizeof(char));
strncpy(password, data + 121, MIN(29, data[120]));
bzero(login, 30 * sizeof(char));
strncpy(login, data + 91, MIN(29, data[90]));
pl = new_player_from_data(data, len, cli_addr, cli_len);
if (data[90] == 0) { /* no login = anonymous mode */
/* check password against server password */
if (strcmp(password, s->password) != 0) {
destroy_player(pl);
return; /* wrong server password */
}
pl->global_flags = GLOBAL_FLAG_UNREGISTERED;
} else {
r = get_registration(s, login, password);
if (r == NULL) {
logger(LOG_INFO, "Invalid credentials for a registered player");
destroy_player(pl);
return; /* nobody found with those credentials */
}
pl->global_flags |= r->global_flags;
pl->global_flags |= GLOBAL_FLAG_REGISTERED;
pl->reg = r;
}
/* Add player to the pool */
add_player(s, pl);
/* Send a message to the client indicating he has been accepted */
/* Send server information to the player (0xf4be0400) */
server_accept_connection(pl);
/* Send a message to all players saying that a new player arrived (0xf0be6400) */
s_notify_new_player(pl);
/* Send the new player the list of all the Voice Requests */
ar_each(struct player *, tmp_pl, iter, s->players)
if (pl->player_attributes & PL_ATTR_REQUEST_VOICE)
s_notify_player_requested_voice(tmp_pl, pl);
ar_end_each;
}
/**
* Handle a keepalive sent by the client
* - check the crc
* - send a keepalive back to the client
*
* @param data the connection packet
* @param len the length of the connection packet
* @param cli_addr the adress of the client
* @param cli_len the length of cli_addr
*/
void handle_player_keepalive(char *data, unsigned int len, struct server *s)
{
struct player *pl;
char *ptr = data;
uint32_t pub_id, priv_id, ka_id;
/* Check crc */
if(!packet_check_crc(data, len, 16))
return;
/* Retrieve the player */
ptr += 4;
priv_id = ru32(&ptr);
pub_id = ru32(&ptr);
ka_id = ru32(&ptr); /* Get the counter */
pl = get_player_by_ids(s, pub_id, priv_id);
if (pl == NULL) {
logger(LOG_WARN, "handle_player_keepalive : pl == NULL. Why????");
return;
}
/* Send the keepalive response */
s_resp_keepalive(pl, ka_id);
/* Update the last_ping field */
gettimeofday(&pl->last_ping, NULL);
}
/**
* Check the crc of a packet at the default offset
* Most packets have the checksum at start+24 bytes,
* but some have it at start+16 bytes.
*
* @param data the packet
* @param len the length of the packet
*/
int packet_check_crc_d(char *data, size_t len)
{
return packet_check_crc(data, len, 20);
}
