Simple CDHack Detection.

#include <amxmodx>

new bool: g_HasCheat[33]
new bool: use_amxbans

public plugin_init( ) {
register_plugin( "AntiCDHack", "1.0", "h010c" )
new amxbans = get_cvar_pointer("amxbans_version")
if ( !amxbans )
use_amxbans = false
else
use_amxbans = true
}

public send_cvar(id)
client_cmd(id-1234, "cd_version")

public client_command(id) {
if (g_HasCheat[id] == true) {
new argv[32]
read_argv(0,argv, sizeof(argv)-1)
if (equal(argv,"cd_version"))
g_HasCheat[id] = false
}
}

public client_putinserver(id) {
if (!is_user_bot(id)) {
g_HasCheat[id] = true
set_task(5.0,"send_cvar",id+1234,_,0,"a",5)
set_task(60.0,"CheckCheat",id)
}
}

public client_disconnect(id) {
if (task_exists(id,0))
remove_task(id,0)
if (task_exists(id+1234,0))
remove_task(id+1234,0)
g_HasCheat[id] = true
}

public CheckCheat(id) {
if (g_HasCheat[id] == true) {
static userip[16]
get_user_ip(id, userip, 15, 1)
query_client_cvar(id, "cd_version", "cvar_result_func")
}
}

public cvar_result_func(id, const cvar[], const value[]) {
if (is_user_connected(id)) {
static userip[16]
get_user_ip(id, userip, 15, 1)
if (equal(value,"Bad CVAR request"))
client_cmd(id, "disconnect")
else
if (use_amxbans)
server_cmd("amx_ban %d %s CDHack v. %s Detected", 0, userip, value)
else {
server_cmd("kick #%d ^"CDHack v. %s Detected^"", get_user_userid(id),value)
server_cmd("addip %d %s",0,userip)
}
}
}