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/* Copyright (C) 2014 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Eric Leblond <eric@regit.org>
*
*/
#include "suricata-common.h"
#include "detect.h"
#include "pkt-var.h"
#include "conf.h"
#include "threads.h"
#include "threadvars.h"
#include "tm-threads.h"
#include "util-print.h"
#include "util-unittest.h"
#include "util-debug.h"
#include "output.h"
#include "app-layer.h"
#include "app-layer-parser.h"
#include "util-privs.h"
#include "util-buffer.h"
#include "util-proto-name.h"
#include "util-logopenfile.h"
#include "util-time.h"
#include "rust.h"
#ifdef HAVE_LUA
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include "util-lua.h"
#include "util-lua-common.h"
#include "util-lua-dns.h"
static int DnsGetDnsRrname(lua_State *luastate)
{
if (!(LuaStateNeedProto(luastate, ALPROTO_DNS)))
return LuaCallbackError(luastate, "error: protocol not dns");
RSDNSTransaction *tx = LuaStateGetTX(luastate);
if (tx == NULL) {
return LuaCallbackError(luastate, "internal error: no tx");
}
return rs_dns_lua_get_rrname(luastate, tx);
}
static int DnsGetTxid(lua_State *luastate)
{
if (!(LuaStateNeedProto(luastate, ALPROTO_DNS)))
return LuaCallbackError(luastate, "error: protocol not dns");
RSDNSTransaction *tx = LuaStateGetTX(luastate);
if (tx == NULL) {
return LuaCallbackError(luastate, "internal error: no tx");
}
rs_dns_lua_get_tx_id(luastate, tx);
return 1;
}
static int DnsGetRcode(lua_State *luastate)
{
if (!(LuaStateNeedProto(luastate, ALPROTO_DNS)))
return LuaCallbackError(luastate, "error: protocol not dns");
RSDNSTransaction *tx = LuaStateGetTX(luastate);
if (tx == NULL) {
return LuaCallbackError(luastate, "internal error: no tx");
}
return rs_dns_lua_get_rcode(luastate, tx);
}
static int DnsGetRecursionDesired(lua_State *luastate)
{
if (!(LuaStateNeedProto(luastate, ALPROTO_DNS)))
return LuaCallbackError(luastate, "error: protocol not dns");
RSDNSTransaction *tx = LuaStateGetTX(luastate);
if (tx == NULL) {
return LuaCallbackError(luastate, "internal error: no tx");
}
uint16_t flags = rs_dns_tx_get_response_flags(tx);
int recursion_desired = flags & 0x0080 ? 1 : 0;
lua_pushboolean(luastate, recursion_desired);
return 1;
}
static int DnsGetQueryTable(lua_State *luastate)
{
if (!(LuaStateNeedProto(luastate, ALPROTO_DNS)))
return LuaCallbackError(luastate, "error: protocol not dns");
RSDNSTransaction *tx = LuaStateGetTX(luastate);
if (tx == NULL) {
return LuaCallbackError(luastate, "internal error: no tx");
}
return rs_dns_lua_get_query_table(luastate, tx);
}
static int DnsGetAnswerTable(lua_State *luastate)
{
if (!(LuaStateNeedProto(luastate, ALPROTO_DNS)))
return LuaCallbackError(luastate, "error: protocol not dns");
RSDNSTransaction *tx = LuaStateGetTX(luastate);
return rs_dns_lua_get_answer_table(luastate, tx);
}
static int DnsGetAuthorityTable(lua_State *luastate)
{
if (!(LuaStateNeedProto(luastate, ALPROTO_DNS)))
return LuaCallbackError(luastate, "error: protocol not dns");
RSDNSTransaction *tx = LuaStateGetTX(luastate);
return rs_dns_lua_get_authority_table(luastate, tx);
}
/** \brief register http lua extensions in a luastate */
int LuaRegisterDnsFunctions(lua_State *luastate)
{
/* registration of the callbacks */
lua_pushcfunction(luastate, DnsGetDnsRrname);
lua_setglobal(luastate, "DnsGetDnsRrname");
lua_pushcfunction(luastate, DnsGetQueryTable);
lua_setglobal(luastate, "DnsGetQueries");
lua_pushcfunction(luastate, DnsGetAnswerTable);
lua_setglobal(luastate, "DnsGetAnswers");
lua_pushcfunction(luastate, DnsGetAuthorityTable);
lua_setglobal(luastate, "DnsGetAuthorities");
lua_pushcfunction(luastate, DnsGetTxid);
lua_setglobal(luastate, "DnsGetTxid");
lua_pushcfunction(luastate, DnsGetRcode);
lua_setglobal(luastate, "DnsGetRcode");
lua_pushcfunction(luastate, DnsGetRecursionDesired);
lua_setglobal(luastate, "DnsGetRecursionDesired");
return 0;
}
#endif /* HAVE_LUA */
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