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LibCore+RequestServer: Add support for SOCKS5 proxies

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This commit is contained in:
Ali Mohammad Pur 2022-04-06 04:14:18 +04:30 • committed by Andreas Kling
parent bd5403adf1
commit cd9d740107
6 changed files with 470 additions and 15 deletions
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9
Userland/Services/RequestServer/ConnectionCache.cpp
View file

@ -6,11 +6,12 @@
#include "ConnectionCache.h"
#include <AK/Debug.h>
#include <AK/Find.h>
#include <LibCore/EventLoop.h>
namespace RequestServer::ConnectionCache {
HashMap<ConnectionKey, NonnullOwnPtr<NonnullOwnPtrVector<Connection<Core::Stream::TCPSocket>>>> g_tcp_connection_cache {};
HashMap<ConnectionKey, NonnullOwnPtr<NonnullOwnPtrVector<Connection<Core::Stream::TCPSocket, Core::Stream::Socket>>>> g_tcp_connection_cache {};
HashMap<ConnectionKey, NonnullOwnPtr<NonnullOwnPtrVector<Connection<TLS::TLSv12>>>> g_tls_connection_cache {};
void request_did_finish(URL const& url, Core::Stream::Socket const* socket)
@ -22,9 +23,9 @@ void request_did_finish(URL const& url, Core::Stream::Socket const* socket)
dbgln_if(REQUESTSERVER_DEBUG, "Request for {} finished", url);
ConnectionKey key { url.host(), url.port_or_default() };
ConnectionKey partial_key { url.host(), url.port_or_default() };
auto fire_off_next_job = [&](auto& cache) {
auto it = cache.find(key);
auto it = find_if(cache.begin(), cache.end(), [&](auto& connection) { return connection.key.hostname == partial_key.hostname && connection.key.port == partial_key.port; });
if (it == cache.end()) {
dbgln("Request for URL {} finished, but we don't own that!", url);
return;
@ -72,7 +73,7 @@ void request_did_finish(URL const& url, Core::Stream::Socket const* socket)
if (is<Core::Stream::BufferedSocket<TLS::TLSv12>>(socket))
fire_off_next_job(g_tls_connection_cache);
else if (is<Core::Stream::BufferedSocket<Core::Stream::TCPSocket>>(socket))
else if (is<Core::Stream::BufferedSocket<Core::Stream::Socket>>(socket))
fire_off_next_job(g_tcp_connection_cache);
else
dbgln("Unknown socket {} finished for URL {}", socket, url);

55
Userland/Services/RequestServer/ConnectionCache.h
View file

@ -15,6 +15,7 @@
#include <LibCore/ElapsedTimer.h>
#include <LibCore/EventLoop.h>
#include <LibCore/NetworkJob.h>
#include <LibCore/SOCKSProxyClient.h>
#include <LibCore/Timer.h>
#include <LibTLS/TLSv12.h>
@ -29,7 +30,31 @@ enum class CacheLevel {
namespace RequestServer::ConnectionCache {
template<typename Socket>
struct Proxy {
Core::ProxyData data;
OwnPtr<Core::SOCKSProxyClient> proxy_client_storage {};
template<typename SocketType, typename StorageType, typename... Args>
ErrorOr<NonnullOwnPtr<StorageType>> tunnel(URL const& url, Args&&... args)
{
if (data.type == Core::ProxyData::Direct) {
return TRY(SocketType::connect(url.host(), url.port_or_default(), forward<Args>(args)...));
}
if (data.type == Core::ProxyData::SOCKS5) {
if constexpr (requires { SocketType::connect(declval<String>(), *proxy_client_storage, forward<Args>(args)...); }) {
proxy_client_storage = TRY(Core::SOCKSProxyClient::connect(data.host_ipv4, data.port, Core::SOCKSProxyClient::Version::V5, url.host(), url.port_or_default()));
return TRY(SocketType::connect(url.host(), *proxy_client_storage, forward<Args>(args)...));
} else if constexpr (IsSame<SocketType, Core::Stream::TCPSocket>) {
return TRY(Core::SOCKSProxyClient::connect(data.host_ipv4, data.port, Core::SOCKSProxyClient::Version::V5, url.host(), url.port_or_default()));
} else {
return Error::from_string_literal("SOCKS5 not supported for this socket type");
}
}
VERIFY_NOT_REACHED();
}
};
template<typename Socket, typename SocketStorageType = Socket>
struct Connection {
struct JobData {
Function<void(Core::Stream::Socket&)> start {};
@ -64,19 +89,22 @@ struct Connection {
};
using QueueType = Vector<JobData>;
using SocketType = Socket;
using StorageType = SocketStorageType;
NonnullOwnPtr<Core::Stream::BufferedSocket<Socket>> socket;
NonnullOwnPtr<Core::Stream::BufferedSocket<SocketStorageType>> socket;
QueueType request_queue;
NonnullRefPtr<Core::Timer> removal_timer;
bool has_started { false };
URL current_url {};
Core::ElapsedTimer timer {};
JobData job_data {};
Proxy proxy {};
};
struct ConnectionKey {
String hostname;
u16 port { 0 };
Core::ProxyData proxy_data {};
bool operator==(ConnectionKey const&) const = default;
};
@ -87,13 +115,13 @@ template<>
struct AK::Traits<RequestServer::ConnectionCache::ConnectionKey> : public AK::GenericTraits<RequestServer::ConnectionCache::ConnectionKey> {
static u32 hash(RequestServer::ConnectionCache::ConnectionKey const& key)
{
return pair_int_hash(key.hostname.hash(), key.port);
return pair_int_hash(pair_int_hash(key.proxy_data.host_ipv4, key.proxy_data.port), pair_int_hash(key.hostname.hash(), key.port));
}
};
namespace RequestServer::ConnectionCache {
extern HashMap<ConnectionKey, NonnullOwnPtr<NonnullOwnPtrVector<Connection<Core::Stream::TCPSocket>>>> g_tcp_connection_cache;
extern HashMap<ConnectionKey, NonnullOwnPtr<NonnullOwnPtrVector<Connection<Core::Stream::TCPSocket, Core::Stream::Socket>>>> g_tcp_connection_cache;
extern HashMap<ConnectionKey, NonnullOwnPtr<NonnullOwnPtrVector<Connection<TLS::TLSv12>>>> g_tls_connection_cache;
void request_did_finish(URL const&, Core::Stream::Socket const*);
@ -106,10 +134,12 @@ template<typename T>
ErrorOr<void> recreate_socket_if_needed(T& connection, URL const& url)
{
using SocketType = typename T::SocketType;
using SocketStorageType = typename T::StorageType;
if (!connection.socket->is_open() || connection.socket->is_eof()) {
// Create another socket for the connection.
auto set_socket = [&](auto socket) -> ErrorOr<void> {
connection.socket = TRY(Core::Stream::BufferedSocket<SocketType>::create(move(socket)));
connection.socket = TRY(Core::Stream::BufferedSocket<SocketStorageType>::create(move(socket)));
return {};
};
@ -132,19 +162,21 @@ ErrorOr<void> recreate_socket_if_needed(T& connection, URL const& url)
return connection.job_data.provide_client_certificates();
return {};
});
TRY(set_socket(TRY(SocketType::connect(url.host(), url.port_or_default(), move(options)))));
TRY(set_socket(TRY((connection.proxy.template tunnel<SocketType, SocketStorageType>(url, move(options))))));
} else {
TRY(set_socket(TRY(SocketType::connect(url.host(), url.port_or_default()))));
TRY(set_socket(TRY((connection.proxy.template tunnel<SocketType, SocketStorageType>(url)))));
}
dbgln_if(REQUESTSERVER_DEBUG, "Creating a new socket for {} -> {}", url, connection.socket);
}
return {};
}
decltype(auto) get_or_create_connection(auto& cache, URL const& url, auto& job)
decltype(auto) get_or_create_connection(auto& cache, URL const& url, auto& job, Core::ProxyData proxy_data = {})
{
using CacheEntryType = RemoveCVReference<decltype(*cache.begin()->value)>;
auto& sockets_for_url = *cache.ensure({ url.host(), url.port_or_default() }, [] { return make<CacheEntryType>(); });
auto& sockets_for_url = *cache.ensure({ url.host(), url.port_or_default(), proxy_data }, [] { return make<CacheEntryType>(); });
Proxy proxy { proxy_data };
using ReturnType = decltype(&sockets_for_url[0]);
auto it = sockets_for_url.find_if([](auto& connection) { return connection->request_queue.is_empty(); });
@ -152,7 +184,7 @@ decltype(auto) get_or_create_connection(auto& cache, URL const& url, auto& job)
auto failed_to_find_a_socket = it.is_end();
if (failed_to_find_a_socket && sockets_for_url.size() < ConnectionCache::MaxConcurrentConnectionsPerURL) {
using ConnectionType = RemoveCVReference<decltype(cache.begin()->value->at(0))>;
auto connection_result = ConnectionType::SocketType::connect(url.host(), url.port_or_default());
auto connection_result = proxy.tunnel<typename ConnectionType::SocketType, typename ConnectionType::StorageType>(url);
if (connection_result.is_error()) {
dbgln("ConnectionCache: Connection to {} failed: {}", url, connection_result.error());
Core::deferred_invoke([&job] {
@ -160,7 +192,7 @@ decltype(auto) get_or_create_connection(auto& cache, URL const& url, auto& job)
});
return ReturnType { nullptr };
}
auto socket_result = Core::Stream::BufferedSocket<typename ConnectionType::SocketType>::create(connection_result.release_value());
auto socket_result = Core::Stream::BufferedSocket<typename ConnectionType::StorageType>::create(connection_result.release_value());
if (socket_result.is_error()) {
dbgln("ConnectionCache: Failed to make a buffered socket for {}: {}", url, socket_result.error());
Core::deferred_invoke([&job] {
@ -172,6 +204,7 @@ decltype(auto) get_or_create_connection(auto& cache, URL const& url, auto& job)
socket_result.release_value(),
typename ConnectionType::QueueType {},
Core::Timer::create_single_shot(ConnectionKeepAliveTimeMilliseconds, nullptr)));
sockets_for_url.last().proxy = move(proxy);
did_add_new_connection = true;
}
size_t index;