static int LuaGetFlowvar(lua_State *luastate)
{
uint16_t idx;
int id;
Flow *f;
FlowVar *fv;
DetectLuaData *ld;
/* need lua data for id -> idx conversion */
lua_pushlightuserdata(luastate, (void *)&luaext_key_ld);
lua_gettable(luastate, LUA_REGISTRYINDEX);
ld = lua_touserdata(luastate, -1);
SCLogDebug("ld %p", ld);
if (ld == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "internal error: no ld");
return 2;
}
/* need flow and lock hint */
f = LuaStateGetFlow(luastate);
if (f == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "no flow");
return 2;
}
/* need flowvar idx */
if (!lua_isnumber(luastate, 1)) {
lua_pushnil(luastate);
lua_pushstring(luastate, "1st arg not a number");
return 2;
}
id = lua_tonumber(luastate, 1);
if (id < 0 || id >= DETECT_LUAJIT_MAX_FLOWVARS) {
lua_pushnil(luastate);
lua_pushstring(luastate, "flowvar id out of range");
return 2;
}
idx = ld->flowvar[id];
if (idx == 0) {
lua_pushnil(luastate);
lua_pushstring(luastate, "flowvar id uninitialized");
return 2;
}
fv = FlowVarGet(f, idx);
if (fv == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "no flow var");
return 2;
}
LuaPushStringBuffer(luastate, (const uint8_t *)fv->data.fv_str.value,
(size_t)fv->data.fv_str.value_len);
return 1;
}
/** \internal
* \brief Wrapper for getting AppLayerProto info into a lua script
* \retval cnt number of items placed on the stack
*/
static int LuaCallbackStatsFlow(lua_State *luastate)
{
int r = 0;
Flow *f = LuaStateGetFlow(luastate);
if (f == NULL)
return LuaCallbackError(luastate, "internal error: no flow");
r = LuaCallbackStatsPushToStackFromFlow(luastate, f);
return r;
}
/** \internal
* \brief Wrapper for getting ts info into a lua script
* \retval cnt number of items placed on the stack
*/
static int LuaCallbackFlowTimeString(lua_State *luastate)
{
int r = 0;
Flow *flow = LuaStateGetFlow(luastate);
if (flow == NULL)
return LuaCallbackError(luastate, "internal error: no flow");
r = LuaCallbackTimeStringPushToStackFromFlow(luastate, flow);
return r;
}
int LuaStateNeedProto(lua_State *luastate, AppProto alproto)
{
AppProto flow_alproto = 0;
Flow *flow = LuaStateGetFlow(luastate);
if (flow == NULL)
return LuaCallbackError(luastate, "internal error: no flow");
flow_alproto = flow->alproto;
return (alproto == flow_alproto);
}
static int TlsGetSNI(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_TLS)))
return LuaCallbackError(luastate, "error: protocol not tls");
int lock_hint = 0;
Flow *f = LuaStateGetFlow(luastate, &lock_hint);
if (f == NULL)
return LuaCallbackError(luastate, "internal error: no flow");
if (lock_hint == LUA_FLOW_NOT_LOCKED_BY_PARENT) {
FLOWLOCK_RDLOCK(f);
r = GetSNI(luastate, f);
FLOWLOCK_UNLOCK(f);
} else {
r = GetSNI(luastate, f);
}
return r;
}
static int LuaDecrFlowint(lua_State *luastate)
{
uint16_t idx;
int id;
Flow *f;
FlowVar *fv;
DetectLuaData *ld;
int flow_lock = 0;
uint32_t number;
/* need luajit data for id -> idx conversion */
lua_pushlightuserdata(luastate, (void *)&luaext_key_ld);
lua_gettable(luastate, LUA_REGISTRYINDEX);
ld = lua_touserdata(luastate, -1);
SCLogDebug("ld %p", ld);
if (ld == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "internal error: no ld");
return 2;
}
/* need flow and lock hint */
f = LuaStateGetFlow(luastate, &flow_lock);
if (f == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "no flow");
return 2;
}
/* need flowint idx */
if (!lua_isnumber(luastate, 1)) {
SCLogDebug("1st arg not a number");
lua_pushnil(luastate);
lua_pushstring(luastate, "1st arg not a number");
return 2;
}
id = lua_tonumber(luastate, 1);
if (id < 0 || id >= DETECT_LUAJIT_MAX_FLOWINTS) {
SCLogDebug("id %d", id);
lua_pushnil(luastate);
lua_pushstring(luastate, "flowint id out of range");
return 2;
}
idx = ld->flowint[id];
if (idx == 0) {
SCLogDebug("idx %u", idx);
lua_pushnil(luastate);
lua_pushstring(luastate, "flowint id uninitialized");
return 2;
}
/* lookup var */
if (flow_lock == LUA_FLOW_NOT_LOCKED_BY_PARENT)
FLOWLOCK_RDLOCK(f);
fv = FlowVarGet(f, idx);
if (fv == NULL) {
number = 0;
} else {
number = fv->data.fv_int.value;
if (number > 0)
number--;
}
FlowVarAddIntNoLock(f, idx, number);
if (flow_lock == LUA_FLOW_NOT_LOCKED_BY_PARENT)
FLOWLOCK_UNLOCK(f);
/* return value through luastate, as a luanumber */
lua_pushnumber(luastate, (lua_Number)number);
SCLogDebug("decremented flow:%p idx:%u value:%u", f, idx, number);
return 1;
}
int LuaSetFlowint(lua_State *luastate)
{
uint16_t idx;
int id;
Flow *f;
DetectEngineThreadCtx *det_ctx;
DetectLuaData *ld;
int flow_lock = 0;
uint32_t number;
lua_Number luanumber;
/* need luajit data for id -> idx conversion */
lua_pushlightuserdata(luastate, (void *)&luaext_key_ld);
lua_gettable(luastate, LUA_REGISTRYINDEX);
ld = lua_touserdata(luastate, -1);
SCLogDebug("ld %p", ld);
if (ld == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "internal error: no ld");
return 2;
}
/* need det_ctx */
lua_pushlightuserdata(luastate, (void *)&luaext_key_det_ctx);
lua_gettable(luastate, LUA_REGISTRYINDEX);
det_ctx = lua_touserdata(luastate, -1);
SCLogDebug("det_ctx %p", det_ctx);
if (det_ctx == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "internal error: no det_ctx");
return 2;
}
/* need flow and lock hint */
f = LuaStateGetFlow(luastate, &flow_lock);
if (f == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "no flow");
return 2;
}
/* need flowint idx */
if (!lua_isnumber(luastate, 1)) {
lua_pushnil(luastate);
lua_pushstring(luastate, "1st arg not a number");
return 2;
}
id = lua_tonumber(luastate, 1);
if (id < 0 || id >= DETECT_LUAJIT_MAX_FLOWVARS) {
lua_pushnil(luastate);
lua_pushstring(luastate, "flowint id out of range");
return 2;
}
if (!lua_isnumber(luastate, 2)) {
lua_pushnil(luastate);
lua_pushstring(luastate, "2nd arg not a number");
return 2;
}
luanumber = lua_tonumber(luastate, 2);
if (luanumber < 0 || id > (double)UINT_MAX) {
lua_pushnil(luastate);
lua_pushstring(luastate, "value out of range, value must be unsigned 32bit int");
return 2;
}
number = (uint32_t)luanumber;
idx = ld->flowint[id];
if (idx == 0) {
lua_pushnil(luastate);
lua_pushstring(luastate, "flowint id uninitialized");
return 2;
}
if (flow_lock == LUA_FLOW_NOT_LOCKED_BY_PARENT)
FlowVarAddInt(f, idx, number);
else
FlowVarAddIntNoLock(f, idx, number);
SCLogDebug("stored flow:%p idx:%u value:%u", f, idx, number);
return 0;
}
int LuaSetFlowvar(lua_State *luastate)
{
uint16_t idx;
int id;
Flow *f;
const char *str;
int len;
uint8_t *buffer;
DetectEngineThreadCtx *det_ctx;
DetectLuaData *ld;
int flow_lock = 0;
/* need luajit data for id -> idx conversion */
lua_pushlightuserdata(luastate, (void *)&luaext_key_ld);
lua_gettable(luastate, LUA_REGISTRYINDEX);
ld = lua_touserdata(luastate, -1);
SCLogDebug("ld %p", ld);
if (ld == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "internal error: no ld");
return 2;
}
/* need det_ctx */
lua_pushlightuserdata(luastate, (void *)&luaext_key_det_ctx);
lua_gettable(luastate, LUA_REGISTRYINDEX);
det_ctx = lua_touserdata(luastate, -1);
SCLogDebug("det_ctx %p", det_ctx);
if (det_ctx == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "internal error: no det_ctx");
return 2;
}
/* need flow and lock hint */
f = LuaStateGetFlow(luastate, &flow_lock);
if (f == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "no flow");
return 2;
}
/* need flowvar idx */
if (!lua_isnumber(luastate, 1)) {
lua_pushnil(luastate);
lua_pushstring(luastate, "1st arg not a number");
return 2;
}
id = lua_tonumber(luastate, 1);
if (id < 0 || id >= DETECT_LUAJIT_MAX_FLOWVARS) {
lua_pushnil(luastate);
lua_pushstring(luastate, "flowvar id out of range");
return 2;
}
if (!lua_isstring(luastate, 2)) {
lua_pushnil(luastate);
lua_pushstring(luastate, "2nd arg not a string");
return 2;
}
str = lua_tostring(luastate, 2);
if (str == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "null string");
return 2;
}
if (!lua_isnumber(luastate, 3)) {
lua_pushnil(luastate);
lua_pushstring(luastate, "3rd arg not a number");
return 2;
}
len = lua_tonumber(luastate, 3);
if (len < 0 || len > 0xffff) {
lua_pushnil(luastate);
lua_pushstring(luastate, "len out of range: max 64k");
return 2;
}
idx = ld->flowvar[id];
if (idx == 0) {
lua_pushnil(luastate);
lua_pushstring(luastate, "flowvar id uninitialized");
return 2;
}
buffer = SCMalloc(len+1);
if (unlikely(buffer == NULL)) {
lua_pushnil(luastate);
lua_pushstring(luastate, "out of memory");
return 2;
}
memcpy(buffer, str, len);
buffer[len] = '\0';
if (flow_lock == LUA_FLOW_NOT_LOCKED_BY_PARENT)
FlowVarAddStr(f, idx, buffer, len);
else
FlowVarAddStrNoLock(f, idx, buffer, len);
//SCLogInfo("stored:");
//PrintRawDataFp(stdout,buffer,len);
return 0;
}
static int LuaGetFlowint(lua_State *luastate)
{
uint16_t idx;
int id;
Flow *f;
FlowVar *fv;
DetectLuaData *ld;
uint32_t number;
/* need lua data for id -> idx conversion */
lua_pushlightuserdata(luastate, (void *)&luaext_key_ld);
lua_gettable(luastate, LUA_REGISTRYINDEX);
ld = lua_touserdata(luastate, -1);
SCLogDebug("ld %p", ld);
if (ld == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "internal error: no ld");
return 2;
}
/* need flow and lock hint */
f = LuaStateGetFlow(luastate);
if (f == NULL) {
lua_pushnil(luastate);
lua_pushstring(luastate, "no flow");
return 2;
}
/* need flowint idx */
if (!lua_isnumber(luastate, 1)) {
SCLogDebug("1st arg not a number");
lua_pushnil(luastate);
lua_pushstring(luastate, "1st arg not a number");
return 2;
}
id = lua_tonumber(luastate, 1);
if (id < 0 || id >= DETECT_LUAJIT_MAX_FLOWINTS) {
SCLogDebug("id %d", id);
lua_pushnil(luastate);
lua_pushstring(luastate, "flowint id out of range");
return 2;
}
idx = ld->flowint[id];
if (idx == 0) {
SCLogDebug("idx %u", idx);
lua_pushnil(luastate);
lua_pushstring(luastate, "flowint id uninitialized");
return 2;
}
/* lookup var */
fv = FlowVarGet(f, idx);
if (fv == NULL) {
SCLogDebug("fv NULL");
lua_pushnil(luastate);
lua_pushstring(luastate, "no flow var");
return 2;
}
number = fv->data.fv_int.value;
/* return value through luastate, as a luanumber */
lua_pushnumber(luastate, (lua_Number)number);
SCLogDebug("retrieved flow:%p idx:%u value:%u", f, idx, number);
return 1;
}
