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#include <nbase.h>
#include "nse_lua.h"
#include "MACLookup.h"
#include "services.h"
#include "protocols.h"
static inline u8 nibble(char hex) {
return (hex & 0xf) + ((hex & 0x40) ? 9 : 0);
}
static int l_mac2corp (lua_State *L)
{
size_t len = 0;
u8 prefix[6] = {0}; // allow a whole MAC addr.
size_t i = 0;
size_t j = 0;
const char *buf = luaL_checklstring(L, 1, &len);
if (len == 6) {
// Option 1: 6-byte raw MAC
lua_pushstring(L, MACPrefix2Corp((u8 *)buf));
return 1;
}
// Try for hex string.
for (i = 0; i + 1 < len && j < 6; i+=2 ) {
if (buf[i] == ':' && i + 2 < len) {
i++;
}
if (isxdigit(buf[i]) && isxdigit(buf[i+1])) {
prefix[j++] = (nibble(buf[i]) << 4) + nibble(buf[i+1]);
}
else {
break;
}
}
// Require exactly 6 bytes result and used the whole input
if (j == 6 && i >= len) {
lua_pushstring(L, MACPrefix2Corp(prefix));
return 1;
}
return luaL_error(L, "Expected a 6-byte MAC address");
}
static int l_getservbyport (lua_State *L)
{
const struct nservent *serv = NULL;
static const u16 proto[] = {IPPROTO_TCP, IPPROTO_UDP, IPPROTO_SCTP};
static const char * op[] = {"tcp", "udp", "sctp"};
lua_Integer port = luaL_checkinteger(L, 1);
int i = luaL_checkoption(L, 2, NULL, op);
if (port < 0 || port > 0xffff) {
return luaL_error(L, "Port number out of range");
}
serv = nmap_getservbyport((u16) port, proto[i]);
if (serv == NULL) {
lua_pushnil(L);
}
else {
lua_pushstring(L, serv->s_name);
}
return 1;
}
static int l_getprotbynum (lua_State *L)
{
const struct nprotoent *proto = NULL;
lua_Integer num = luaL_checkinteger(L, 1);
if (num < 0 || num > 0xff) {
return luaL_error(L, "Protocol number out of range");
}
proto = nmap_getprotbynum(num);
if (proto == NULL) {
lua_pushnil(L);
}
else {
lua_pushstring(L, proto->p_name);
}
return 1;
}
static int l_getprotbyname (lua_State *L)
{
const struct nprotoent *proto = NULL;
const char *name = luaL_checkstring(L, 1);
proto = nmap_getprotbyname(name);
if (proto == NULL) {
lua_pushnil(L);
}
else {
lua_pushinteger(L, proto->p_proto);
}
return 1;
}
LUALIB_API int luaopen_db (lua_State *L)
{
static const luaL_Reg dblib [] = {
{"mac2corp", l_mac2corp},
{"getservbyport", l_getservbyport},
{"getprotbynum", l_getprotbynum},
{"getprotbyname", l_getprotbyname},
{NULL, NULL}
};
luaL_newlib(L, dblib);
return 1;
}
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