Autotrade

void clif_parse_WantToConnection(int fd, TBL_PC* sd)
{
    int cmd, account_id, char_id, login_id1, sex;
    unsigned int client_tick; //The client tick is a tick, therefore it needs be unsigned. [Skotlex]
    int packet_ver;    // 5: old, 6: 7july04, 7: 13july04, 8: 26july04, 9: 9aug04/16aug04/17aug04, 10: 6sept04, 11: 21sept04, 12: 18oct04, 13: 25oct04 (by [Yor])

    if (sd) {
        ShowError("clif_parse_WantToConnection : invalid request (character already logged in)?\n");
        return;
    }

    // Only valid packet version get here
    packet_ver = clif_guess_PacketVer(fd, 1, NULL);

    cmd = RFIFOW(fd,0);
    account_id  = RFIFOL(fd, packet_db[packet_ver][cmd].pos[0]);
    char_id     = RFIFOL(fd, packet_db[packet_ver][cmd].pos[1]);
    login_id1   = RFIFOL(fd, packet_db[packet_ver][cmd].pos[2]);
    client_tick = RFIFOL(fd, packet_db[packet_ver][cmd].pos[3]);
    sex         = RFIFOB(fd, packet_db[packet_ver][cmd].pos[4]);

    if( packet_ver < 5 || // reject really old client versions
            (packet_ver <= 9 && (battle_config.packet_ver_flag & 1) == 0) || // older than 6sept04
            (packet_ver > 9 && (battle_config.packet_ver_flag & 1<<(packet_ver-9)) == 0)) // version not allowed
    {// packet version rejected
        ShowInfo("Rejected connection attempt, forbidden packet version (AID/CID: '"CL_WHITE"%d/%d"CL_RESET"', Packet Ver: '"CL_WHITE"%d"CL_RESET"', IP: '"CL_WHITE"%s"CL_RESET"').\n", account_id, char_id, packet_ver, ip2str(session[fd]->client_addr, NULL));
        WFIFOHEAD(fd,packet_len(0x6a));
        WFIFOW(fd,0) = 0x6a;
        WFIFOB(fd,2) = 5; // Your Game's EXE file is not the latest version
        WFIFOSET(fd,packet_len(0x6a));
        clif_setwaitclose(fd);
        return;
    } else if( map_knowsaccount(account_id) )
    {// double login
        ShowError("clif_parse_WantToConnection: double login attempt AID/CID: %d/%d, rejecting...\n", account_id, char_id);
        WFIFOHEAD(fd,packet_len(0x6a));
        WFIFOW(fd,0) = 0x6a;
        WFIFOB(fd,2) = 3; // Rejected by server
        WFIFOSET(fd,packet_len(0x6a));
        clif_setwaitclose(fd);
        return;
    }
    else
    {// packet version accepted
        struct block_list* bl;
        if( (bl=map_id2bl(account_id)) != NULL && bl->type != BL_PC )
        {// non-player object already has that id
            ShowError("clif_parse_WantToConnection: a non-player object already has id %d, please increase the starting account number\n", account_id);
            WFIFOHEAD(fd,packet_len(0x6a));
            WFIFOW(fd,0) = 0x6a;
            WFIFOB(fd,2) = 3; // Rejected by server
            WFIFOSET(fd,packet_len(0x6a));
            clif_setwaitclose(fd);
            return;
        }
    }

    CREATE(sd, TBL_PC, 1);
    sd->fd = fd;
    sd->packet_ver = packet_ver;
    session[fd]->session_data = sd;

    pc_setnewpc(sd, account_id, char_id, login_id1, client_tick, sex, fd);

#if PACKETVER < 8
    WFIFOHEAD(fd,4);
    WFIFOL(fd,0) = sd->bl.id;
    WFIFOSET(fd,4);
#else
    WFIFOHEAD(fd,packet_len(0x283));
    WFIFOW(fd,0) = 0x283;
    WFIFOL(fd,2) = sd->bl.id;
    WFIFOSET(fd,packet_len(0x283));
#endif

    chrif_authreq(sd);

#define PACKETVER    7