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/* Copyright (C) 2017 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.
*/
use std::os::raw::c_int;
use crate::dns::dns::*;
use crate::dns::log::*;
use crate::lua::*;
#[no_mangle]
pub extern "C" fn rs_dns_lua_get_tx_id(clua: &mut CLuaState, tx: &mut DNSTransaction) {
let lua = LuaState { lua: clua };
lua.pushinteger(tx.tx_id() as i64);
}
#[no_mangle]
pub extern "C" fn rs_dns_lua_get_rrname(clua: &mut CLuaState, tx: &mut DNSTransaction) -> c_int {
let lua = LuaState { lua: clua };
if let Some(request) = &tx.request {
if let Some(query) = request.queries.first() {
lua.pushstring(&String::from_utf8_lossy(&query.name));
return 1;
}
} else if let Some(response) = &tx.response {
if let Some(query) = response.queries.first() {
lua.pushstring(&String::from_utf8_lossy(&query.name));
return 1;
}
}
return 0;
}
#[no_mangle]
pub extern "C" fn rs_dns_lua_get_rcode(clua: &mut CLuaState, tx: &mut DNSTransaction) -> c_int {
let lua = LuaState { lua: clua };
let rcode = tx.rcode();
if rcode > 0 {
lua.pushstring(&dns_rcode_string(rcode));
return 1;
}
return 0;
}
#[no_mangle]
pub extern "C" fn rs_dns_lua_get_query_table(
clua: &mut CLuaState, tx: &mut DNSTransaction,
) -> c_int {
let lua = LuaState { lua: clua };
let mut i: i64 = 0;
// Create table now to be consistent with C that always returns
// table even in the absence of any authorities.
lua.newtable();
// We first look in the request for queries. However, if there is
// no request, check the response for queries.
if let Some(request) = &tx.request {
for query in &request.queries {
lua.pushinteger(i);
i += 1;
lua.newtable();
lua.pushstring("type");
lua.pushstring(&dns_rrtype_string(query.rrtype));
lua.settable(-3);
lua.pushstring("rrname");
lua.pushstring(&String::from_utf8_lossy(&query.name));
lua.settable(-3);
lua.settable(-3);
}
} else if let Some(response) = &tx.response {
for query in &response.queries {
lua.pushinteger(i);
i += 1;
lua.newtable();
lua.pushstring("type");
lua.pushstring(&dns_rrtype_string(query.rrtype));
lua.settable(-3);
lua.pushstring("rrname");
lua.pushstring(&String::from_utf8_lossy(&query.name));
lua.settable(-3);
lua.settable(-3);
}
}
// Again, always return 1 to be consistent with C, even if the
// table is empty.
return 1;
}
#[no_mangle]
pub extern "C" fn rs_dns_lua_get_answer_table(
clua: &mut CLuaState, tx: &mut DNSTransaction,
) -> c_int {
let lua = LuaState { lua: clua };
let mut i: i64 = 0;
// Create table now to be consistent with C that always returns
// table even in the absence of any authorities.
lua.newtable();
if let Some(response) = &tx.response {
for answer in &response.answers {
lua.pushinteger(i);
i += 1;
lua.newtable();
lua.pushstring("type");
lua.pushstring(&dns_rrtype_string(answer.rrtype));
lua.settable(-3);
lua.pushstring("ttl");
lua.pushinteger(answer.ttl as i64);
lua.settable(-3);
lua.pushstring("rrname");
lua.pushstring(&String::from_utf8_lossy(&answer.name));
lua.settable(-3);
// All rdata types are pushed to "addr" for backwards compatibility
match answer.data {
DNSRData::A(ref bytes) | DNSRData::AAAA(ref bytes) => {
if !bytes.is_empty() {
lua.pushstring("addr");
lua.pushstring(&dns_print_addr(bytes));
lua.settable(-3);
}
}
DNSRData::CNAME(ref bytes)
| DNSRData::MX(ref bytes)
| DNSRData::NS(ref bytes)
| DNSRData::TXT(ref bytes)
| DNSRData::NULL(ref bytes)
| DNSRData::PTR(ref bytes)
| DNSRData::Unknown(ref bytes) => {
if !bytes.is_empty() {
lua.pushstring("addr");
lua.pushstring(&String::from_utf8_lossy(bytes));
lua.settable(-3);
}
}
DNSRData::SOA(ref soa) => {
if !soa.mname.is_empty() {
lua.pushstring("addr");
lua.pushstring(&String::from_utf8_lossy(&soa.mname));
lua.settable(-3);
}
}
DNSRData::SSHFP(ref sshfp) => {
lua.pushstring("addr");
lua.pushstring(&String::from_utf8_lossy(&sshfp.fingerprint));
lua.settable(-3);
}
DNSRData::SRV(ref srv) => {
lua.pushstring("addr");
lua.pushstring(&String::from_utf8_lossy(&srv.target));
lua.settable(-3);
}
}
lua.settable(-3);
}
}
// Again, always return 1 to be consistent with C, even if the
// table is empty.
return 1;
}
#[no_mangle]
pub extern "C" fn rs_dns_lua_get_authority_table(
clua: &mut CLuaState, tx: &mut DNSTransaction,
) -> c_int {
let lua = LuaState { lua: clua };
let mut i: i64 = 0;
// Create table now to be consistent with C that always returns
// table even in the absence of any authorities.
lua.newtable();
if let Some(response) = &tx.response {
for answer in &response.authorities {
lua.pushinteger(i);
i += 1;
lua.newtable();
lua.pushstring("type");
lua.pushstring(&dns_rrtype_string(answer.rrtype));
lua.settable(-3);
lua.pushstring("ttl");
lua.pushinteger(answer.ttl as i64);
lua.settable(-3);
lua.pushstring("rrname");
lua.pushstring(&String::from_utf8_lossy(&answer.name));
lua.settable(-3);
lua.settable(-3);
}
}
// Again, always return 1 to be consistent with C, even if the
// table is empty.
return 1;
}
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