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godot/modules/upnp/upnp.cpp
Alistair Leslie-Hughes 767bfec8b6 Use local variable to stop memory leak. 
I've change the urls variable to be a local, instead of manually allocating it all the time.
This is only used locally and was causing a memory leak because FreeUPNPUrls gave the impression it free it.

1. FreeUPNPUrls doesn't free the pointer passed in, that's up to caller.
2. The second if(!urls) produced dead code as we checked the pointer just after allocation.
2024-04-05 09:13:27 +11:00

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/**************************************************************************/
/* upnp.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "upnp.h"
#include <miniwget.h>
#include <upnpcommands.h>
#include <stdlib.h>
bool UPNP::is_common_device(const String &dev) const {
return dev.is_empty() ||
dev.find("InternetGatewayDevice") >= 0 ||
dev.find("WANIPConnection") >= 0 ||
dev.find("WANPPPConnection") >= 0 ||
dev.find("rootdevice") >= 0;
}
int UPNP::discover(int timeout, int ttl, const String &device_filter) {
ERR_FAIL_COND_V_MSG(timeout < 0, UPNP_RESULT_INVALID_PARAM, "The response's wait time can't be negative.");
ERR_FAIL_COND_V_MSG(ttl < 0 || ttl > 255, UPNP_RESULT_INVALID_PARAM, "The time-to-live must be set between 0 and 255 (inclusive).");
devices.clear();
int error = 0;
struct UPNPDev *devlist;
CharString cs = discover_multicast_if.utf8();
const char *m_if = cs.length() ? cs.get_data() : nullptr;
if (is_common_device(device_filter)) {
devlist = upnpDiscover(timeout, m_if, nullptr, discover_local_port, discover_ipv6, ttl, &error);
} else {
devlist = upnpDiscoverAll(timeout, m_if, nullptr, discover_local_port, discover_ipv6, ttl, &error);
}
if (error != UPNPDISCOVER_SUCCESS) {
switch (error) {
case UPNPDISCOVER_SOCKET_ERROR:
return UPNP_RESULT_SOCKET_ERROR;
case UPNPDISCOVER_MEMORY_ERROR:
return UPNP_RESULT_MEM_ALLOC_ERROR;
default:
return UPNP_RESULT_UNKNOWN_ERROR;
}
}
if (!devlist) {
return UPNP_RESULT_NO_DEVICES;
}
struct UPNPDev *dev = devlist;
while (dev) {
if (device_filter.is_empty() || strstr(dev->st, device_filter.utf8().get_data())) {
add_device_to_list(dev, devlist);
}
dev = dev->pNext;
}
freeUPNPDevlist(devlist);
return UPNP_RESULT_SUCCESS;
}
void UPNP::add_device_to_list(UPNPDev *dev, UPNPDev *devlist) {
Ref<UPNPDevice> new_device;
new_device.instantiate();
new_device->set_description_url(dev->descURL);
new_device->set_service_type(dev->st);
parse_igd(new_device, devlist);
devices.push_back(new_device);
}
char *UPNP::load_description(const String &url, int *size, int *status_code) const {
return (char *)miniwget(url.utf8().get_data(), size, 0, status_code);
}
void UPNP::parse_igd(Ref<UPNPDevice> dev, UPNPDev *devlist) {
int size = 0;
int status_code = -1;
char *xml = load_description(dev->get_description_url(), &size, &status_code);
if (status_code != 200) {
dev->set_igd_status(UPNPDevice::IGD_STATUS_HTTP_ERROR);
return;
}
if (!xml || size < 1) {
dev->set_igd_status(UPNPDevice::IGD_STATUS_HTTP_EMPTY);
return;
}
struct UPNPUrls urls = {};
struct IGDdatas data;
parserootdesc(xml, size, &data);
free(xml);
xml = nullptr;
GetUPNPUrls(&urls, &data, dev->get_description_url().utf8().get_data(), 0);
char addr[16];
int i = UPNP_GetValidIGD(devlist, &urls, &data, (char *)&addr, 16);
if (i != 1) {
FreeUPNPUrls(&urls);
switch (i) {
case 0:
dev->set_igd_status(UPNPDevice::IGD_STATUS_NO_IGD);
return;
case 2:
dev->set_igd_status(UPNPDevice::IGD_STATUS_DISCONNECTED);
return;
case 3:
dev->set_igd_status(UPNPDevice::IGD_STATUS_UNKNOWN_DEVICE);
return;
default:
dev->set_igd_status(UPNPDevice::IGD_STATUS_UNKNOWN_ERROR);
return;
}
}
if (urls.controlURL[0] == '\0') {
FreeUPNPUrls(&urls);
dev->set_igd_status(UPNPDevice::IGD_STATUS_INVALID_CONTROL);
return;
}
dev->set_igd_control_url(urls.controlURL);
dev->set_igd_service_type(data.first.servicetype);
dev->set_igd_our_addr(addr);
dev->set_igd_status(UPNPDevice::IGD_STATUS_OK);
FreeUPNPUrls(&urls);
}
int UPNP::upnp_result(int in) {
switch (in) {
case UPNPCOMMAND_SUCCESS:
return UPNP_RESULT_SUCCESS;
case UPNPCOMMAND_UNKNOWN_ERROR:
return UPNP_RESULT_UNKNOWN_ERROR;
case UPNPCOMMAND_INVALID_ARGS:
return UPNP_RESULT_INVALID_ARGS;
case UPNPCOMMAND_HTTP_ERROR:
return UPNP_RESULT_HTTP_ERROR;
case UPNPCOMMAND_INVALID_RESPONSE:
return UPNP_RESULT_INVALID_RESPONSE;
case UPNPCOMMAND_MEM_ALLOC_ERROR:
return UPNP_RESULT_MEM_ALLOC_ERROR;
case 402:
return UPNP_RESULT_INVALID_ARGS;
case 403:
return UPNP_RESULT_NOT_AUTHORIZED;
case 501:
return UPNP_RESULT_ACTION_FAILED;
case 606:
return UPNP_RESULT_NOT_AUTHORIZED;
case 714:
return UPNP_RESULT_NO_SUCH_ENTRY_IN_ARRAY;
case 715:
return UPNP_RESULT_SRC_IP_WILDCARD_NOT_PERMITTED;
case 716:
return UPNP_RESULT_EXT_PORT_WILDCARD_NOT_PERMITTED;
case 718:
return UPNP_RESULT_CONFLICT_WITH_OTHER_MAPPING;
case 724:
return UPNP_RESULT_SAME_PORT_VALUES_REQUIRED;
case 725:
return UPNP_RESULT_ONLY_PERMANENT_LEASE_SUPPORTED;
case 726:
return UPNP_RESULT_REMOTE_HOST_MUST_BE_WILDCARD;
case 727:
return UPNP_RESULT_EXT_PORT_MUST_BE_WILDCARD;
case 728:
return UPNP_RESULT_NO_PORT_MAPS_AVAILABLE;
case 729:
return UPNP_RESULT_CONFLICT_WITH_OTHER_MECHANISM;
case 732:
return UPNP_RESULT_INT_PORT_WILDCARD_NOT_PERMITTED;
case 733:
return UPNP_RESULT_INCONSISTENT_PARAMETERS;
}
return UPNP_RESULT_UNKNOWN_ERROR;
}
int UPNP::get_device_count() const {
return devices.size();
}
Ref<UPNPDevice> UPNP::get_device(int index) const {
ERR_FAIL_INDEX_V(index, devices.size(), nullptr);
return devices.get(index);
}
void UPNP::add_device(Ref<UPNPDevice> device) {
ERR_FAIL_NULL(device);
devices.push_back(device);
}
void UPNP::set_device(int index, Ref<UPNPDevice> device) {
ERR_FAIL_INDEX(index, devices.size());
ERR_FAIL_NULL(device);
devices.set(index, device);
}
void UPNP::remove_device(int index) {
ERR_FAIL_INDEX(index, devices.size());
devices.remove_at(index);
}
void UPNP::clear_devices() {
devices.clear();
}
Ref<UPNPDevice> UPNP::get_gateway() const {
ERR_FAIL_COND_V_MSG(devices.is_empty(), nullptr, "Couldn't find any UPNPDevices.");
for (int i = 0; i < devices.size(); i++) {
Ref<UPNPDevice> dev = get_device(i);
if (dev != nullptr && dev->is_valid_gateway()) {
return dev;
}
}
return nullptr;
}
void UPNP::set_discover_multicast_if(const String &m_if) {
discover_multicast_if = m_if;
}
String UPNP::get_discover_multicast_if() const {
return discover_multicast_if;
}
void UPNP::set_discover_local_port(int port) {
discover_local_port = port;
}
int UPNP::get_discover_local_port() const {
return discover_local_port;
}
void UPNP::set_discover_ipv6(bool ipv6) {
discover_ipv6 = ipv6;
}
bool UPNP::is_discover_ipv6() const {
return discover_ipv6;
}
String UPNP::query_external_address() const {
Ref<UPNPDevice> dev = get_gateway();
if (dev == nullptr) {
return "";
}
return dev->query_external_address();
}
int UPNP::add_port_mapping(int port, int port_internal, String desc, String proto, int duration) const {
Ref<UPNPDevice> dev = get_gateway();
if (dev == nullptr) {
return UPNP_RESULT_NO_GATEWAY;
}
return dev->add_port_mapping(port, port_internal, desc, proto, duration);
}
int UPNP::delete_port_mapping(int port, String proto) const {
Ref<UPNPDevice> dev = get_gateway();
if (dev == nullptr) {
return UPNP_RESULT_NO_GATEWAY;
}
return dev->delete_port_mapping(port, proto);
}
void UPNP::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_device_count"), &UPNP::get_device_count);
ClassDB::bind_method(D_METHOD("get_device", "index"), &UPNP::get_device);
ClassDB::bind_method(D_METHOD("add_device", "device"), &UPNP::add_device);
ClassDB::bind_method(D_METHOD("set_device", "index", "device"), &UPNP::set_device);
ClassDB::bind_method(D_METHOD("remove_device", "index"), &UPNP::remove_device);
ClassDB::bind_method(D_METHOD("clear_devices"), &UPNP::clear_devices);
ClassDB::bind_method(D_METHOD("get_gateway"), &UPNP::get_gateway);
ClassDB::bind_method(D_METHOD("discover", "timeout", "ttl", "device_filter"), &UPNP::discover, DEFVAL(2000), DEFVAL(2), DEFVAL("InternetGatewayDevice"));
ClassDB::bind_method(D_METHOD("query_external_address"), &UPNP::query_external_address);
ClassDB::bind_method(D_METHOD("add_port_mapping", "port", "port_internal", "desc", "proto", "duration"), &UPNP::add_port_mapping, DEFVAL(0), DEFVAL(""), DEFVAL("UDP"), DEFVAL(0));
ClassDB::bind_method(D_METHOD("delete_port_mapping", "port", "proto"), &UPNP::delete_port_mapping, DEFVAL("UDP"));
ClassDB::bind_method(D_METHOD("set_discover_multicast_if", "m_if"), &UPNP::set_discover_multicast_if);
ClassDB::bind_method(D_METHOD("get_discover_multicast_if"), &UPNP::get_discover_multicast_if);
ADD_PROPERTY(PropertyInfo(Variant::STRING, "discover_multicast_if"), "set_discover_multicast_if", "get_discover_multicast_if");
ClassDB::bind_method(D_METHOD("set_discover_local_port", "port"), &UPNP::set_discover_local_port);
ClassDB::bind_method(D_METHOD("get_discover_local_port"), &UPNP::get_discover_local_port);
ADD_PROPERTY(PropertyInfo(Variant::INT, "discover_local_port", PROPERTY_HINT_RANGE, "0,65535"), "set_discover_local_port", "get_discover_local_port");
ClassDB::bind_method(D_METHOD("set_discover_ipv6", "ipv6"), &UPNP::set_discover_ipv6);
ClassDB::bind_method(D_METHOD("is_discover_ipv6"), &UPNP::is_discover_ipv6);
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "discover_ipv6"), "set_discover_ipv6", "is_discover_ipv6");
BIND_ENUM_CONSTANT(UPNP_RESULT_SUCCESS);
BIND_ENUM_CONSTANT(UPNP_RESULT_NOT_AUTHORIZED);
BIND_ENUM_CONSTANT(UPNP_RESULT_PORT_MAPPING_NOT_FOUND);
BIND_ENUM_CONSTANT(UPNP_RESULT_INCONSISTENT_PARAMETERS);
BIND_ENUM_CONSTANT(UPNP_RESULT_NO_SUCH_ENTRY_IN_ARRAY);
BIND_ENUM_CONSTANT(UPNP_RESULT_ACTION_FAILED);
BIND_ENUM_CONSTANT(UPNP_RESULT_SRC_IP_WILDCARD_NOT_PERMITTED);
BIND_ENUM_CONSTANT(UPNP_RESULT_EXT_PORT_WILDCARD_NOT_PERMITTED);
BIND_ENUM_CONSTANT(UPNP_RESULT_INT_PORT_WILDCARD_NOT_PERMITTED);
BIND_ENUM_CONSTANT(UPNP_RESULT_REMOTE_HOST_MUST_BE_WILDCARD);
BIND_ENUM_CONSTANT(UPNP_RESULT_EXT_PORT_MUST_BE_WILDCARD);
BIND_ENUM_CONSTANT(UPNP_RESULT_NO_PORT_MAPS_AVAILABLE);
BIND_ENUM_CONSTANT(UPNP_RESULT_CONFLICT_WITH_OTHER_MECHANISM);
BIND_ENUM_CONSTANT(UPNP_RESULT_CONFLICT_WITH_OTHER_MAPPING);
BIND_ENUM_CONSTANT(UPNP_RESULT_SAME_PORT_VALUES_REQUIRED);
BIND_ENUM_CONSTANT(UPNP_RESULT_ONLY_PERMANENT_LEASE_SUPPORTED);
BIND_ENUM_CONSTANT(UPNP_RESULT_INVALID_GATEWAY);
BIND_ENUM_CONSTANT(UPNP_RESULT_INVALID_PORT);
BIND_ENUM_CONSTANT(UPNP_RESULT_INVALID_PROTOCOL);
BIND_ENUM_CONSTANT(UPNP_RESULT_INVALID_DURATION);
BIND_ENUM_CONSTANT(UPNP_RESULT_INVALID_ARGS);
BIND_ENUM_CONSTANT(UPNP_RESULT_INVALID_RESPONSE);
BIND_ENUM_CONSTANT(UPNP_RESULT_INVALID_PARAM);
BIND_ENUM_CONSTANT(UPNP_RESULT_HTTP_ERROR);
BIND_ENUM_CONSTANT(UPNP_RESULT_SOCKET_ERROR);
BIND_ENUM_CONSTANT(UPNP_RESULT_MEM_ALLOC_ERROR);
BIND_ENUM_CONSTANT(UPNP_RESULT_NO_GATEWAY);
BIND_ENUM_CONSTANT(UPNP_RESULT_NO_DEVICES);
BIND_ENUM_CONSTANT(UPNP_RESULT_UNKNOWN_ERROR);
}
UPNP::UPNP() {
}
UPNP::~UPNP() {
}
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