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Threading python partialy fixed

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This commit is contained in:
DomySh
2022-06-18 20:29:52 +02:00
parent 621f8e4129
commit 2332a4f5f7
5 changed files with 250 additions and 193 deletions
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67
backend/proxy/__init__.py
View File

@@ -1,8 +1,8 @@
from signal import SIGUSR1
from signal import SIGUSR1, SIGUSR2
from secrets import token_urlsafe
from kthread import KThread
import re, os
from ctypes import CDLL, c_char_p, c_int, c_ushort
from threading import Thread
from ctypes import CDLL, POINTER, c_char_p, c_int, c_ushort, CFUNCTYPE, c_void_p, byref
#c++ -o proxy proxy.cpp
@@ -42,46 +42,44 @@ class Proxy:
if not os.path.exists(config_file_path):
self.config_file_path = config_file_path
self.lib = CDLL(os.path.join(os.path.dirname(os.path.abspath(__file__)),"./proxy.so"))
self.lib.proxy_start.restype = c_int
#char* local_host_p, unsigned short local_port, char* forward_host_p, unsigned short forward_port, char* config_file_p
self.lib.proxy_start.argtypes = [c_char_p, c_ushort, c_char_p, c_ushort, c_char_p]
self.lib.start_proxy.restype = c_int
#char* local_host_p, unsigned short local_port, char* forward_host_p, unsigned short forward_port, char* config_file_p, void (*incrementCallback_p)(const char *)
self.lib.start_proxy.argtypes = [c_char_p, c_ushort, c_char_p, c_ushort, c_char_p, POINTER(c_int), c_void_p]
def start(self, in_pause=False):
if self.process is None:
filter_map = self.compile_filters()
filters_codes = list(filter_map.keys()) if not in_pause else []
self.filter_map = self.compile_filters()
filters_codes = list(self.filter_map.keys()) if not in_pause else []
self.__write_config(filters_codes)
self.process = Thread(
target=self.lib.proxy_start,
@CFUNCTYPE(None, c_char_p)
def callback_wrap(regex):
filter = self.filter_map[regex.decode()]
filter.blocked+=1
print(self.filter_map)
if self.callback_blocked_update:
self.callback_blocked_update(self.filter_map[regex.decode()])
status_code = c_int(1)
self.process = KThread(
target=self.lib.start_proxy,
args=(self.public_host.encode(), self.public_port,
self.internal_host.encode(), self.internal_port,
self.config_file_path.encode()
self.config_file_path.encode(),
byref(status_code), callback_wrap
),
)
#for stdout_line in iter(self.process.stdout.readline, ""):
# if stdout_line.startswith("BLOCKED"):
# regex_id = stdout_line.split()[1]
# filter_map[regex_id].blocked+=1
# if self.callback_blocked_update: self.callback_blocked_update(filter_map[regex_id])
#self.process.stdout.close()
)
self.process.start()
return self.process.wait()
self.process.join()
self.__delete_config()
return status_code.value
def stop(self):
if self.process:
self.process.terminate()
try:
self.process.wait(timeout=3)
return True
except Exception:
self.process.kill()
return False
finally:
self.process = None
if self.process.is_alive():
os.kill(self.process.native_id,SIGUSR2)
self.process = None
return True
def restart(self, in_pause=False):
@@ -93,7 +91,10 @@ class Proxy:
with open(self.config_file_path,'w') as config_file:
for line in filters_codes:
config_file.write(line + '\n')
def __delete_config(self):
os.remove(self.config_file_path)
def reload(self):
if self.isactive():
filter_map = self.compile_filters()
@@ -102,7 +103,9 @@ class Proxy:
self.trigger_reload_config()
def isactive(self):
return True if self.process else False
if self.process and not self.process.is_alive():
self.process = None
return not self.process is None
def trigger_reload_config(self):
os.kill(self.process.native_id, SIGUSR1)

371
backend/proxy/proxy.cpp
View File

@@ -4,6 +4,7 @@
#include <string>
#include <csignal>
#include <fstream>
#include <unistd.h>
#include <boost/regex.hpp>
#include <boost/shared_ptr.hpp>
@@ -11,13 +12,14 @@
#include <boost/bind.hpp>
#include <boost/asio.hpp>
#include <boost/thread/mutex.hpp>
#include <map>
#include <cctype> // is*
//#define DEBUG
using namespace std;
#define DEBUG
int to_int(int c) {
if (not isxdigit(c)) return -1; // error: non-hexadecimal digit found
if (isdigit(c)) return c - '0';
@@ -37,8 +39,94 @@ unhexlify(InputIterator first, InputIterator last, OutputIterator ascii) {
return 0;
}
vector<pair<string,boost::regex>> regex_s_c_w, regex_c_s_w, regex_s_c_b, regex_c_s_b;
string config_file;
namespace tcp_proxy{
class acceptor;
};
struct regex_filter_table{
vector<pair<string,boost::regex>>
regex_s_c_w, regex_c_s_w, regex_s_c_b, regex_c_s_b;
};
struct regex_proxy{
string config_file;
tcp_proxy::acceptor *acceptor;
int* status_code;
regex_filter_table filter_tab;
void (*incrementCallback)(const char *) = nullptr;
};
map<pid_t, regex_proxy*> proxy_map;
auto firewall(){
return proxy_map[gettid()];
}
void push_regex(char* arg, bool case_sensitive, vector<pair<string,boost::regex>> &v){
size_t expr_len = (strlen(arg)-2)/2;
char expr[expr_len];
unhexlify(arg+2, arg+strlen(arg)-1, expr);
if (case_sensitive){
boost::regex regex(reinterpret_cast<char*>(expr),
reinterpret_cast<char*>(expr) + expr_len);
#ifdef DEBUG
cout << "Added case sensitive regex " << expr << endl;
#endif
v.push_back(make_pair(string(arg), regex));
} else {
boost::regex regex(reinterpret_cast<char*>(expr),
reinterpret_cast<char*>(expr) + expr_len, boost::regex::icase);
#ifdef DEBUG
cout << "Added case insensitive regex " << expr << endl;
#endif
v.push_back(make_pair(string(arg), regex));
}
}
void update_regex(){
fstream fd;
fd.open(firewall()->config_file,ios::in);
if (!fd.is_open()){
std::cerr << "Error: config file couln't be opened" << std::endl;
*(firewall()->status_code) = 2;
return;
}
firewall()->filter_tab.regex_s_c_w.clear();
firewall()->filter_tab.regex_c_s_w.clear();
firewall()->filter_tab.regex_s_c_b.clear();
firewall()->filter_tab.regex_c_s_b.clear();
string line;
while(getline(fd, line)){
char tp[line.length() +1];
strcpy(tp, line.c_str());
if (strlen(tp) >= 2){
bool case_sensitive = true;
if(tp[0] == '0'){
case_sensitive = false;
}
switch(tp[1]){
case 'C': { // Client to server Blacklist
push_regex(tp, case_sensitive, firewall()->filter_tab.regex_c_s_b);
break;
}
case 'c': { // Client to server Whitelist
push_regex(tp, case_sensitive, firewall()->filter_tab.regex_c_s_w);
break;
}
case 'S': { // Server to client Blacklist
push_regex(tp, case_sensitive, firewall()->filter_tab.regex_s_c_b);
break;
}
case 's': { // Server to client Whitelist
push_regex(tp, case_sensitive, firewall()->filter_tab.regex_s_c_w);
break;
}
}
}
}
}
bool filter_data(unsigned char* data, const size_t& bytes_transferred, vector<pair<string,boost::regex>> const &blacklist, vector<pair<string,boost::regex>> const &whitelist){
#ifdef DEBUG
@@ -52,7 +140,7 @@ bool filter_data(unsigned char* data, const size_t& bytes_transferred, vector<pa
boost::cmatch what;
if (boost::regex_match(reinterpret_cast<const char*>(data),
reinterpret_cast<const char*>(data) + bytes_transferred, what, ele.second)){
cout << "BLOCKED " << ele.first << endl;
if (firewall()->incrementCallback != nullptr) firewall()->incrementCallback(ele.first.c_str());
return false;
}
}
@@ -60,7 +148,7 @@ bool filter_data(unsigned char* data, const size_t& bytes_transferred, vector<pa
boost::cmatch what;
if (!boost::regex_match(reinterpret_cast<const char*>(data),
reinterpret_cast<const char*>(data) + bytes_transferred, what, ele.second)){
cout << "BLOCKED " << ele.first << endl;
if (firewall()->incrementCallback != nullptr) firewall()->incrementCallback(ele.first.c_str());
return false;
}
}
@@ -74,13 +162,10 @@ namespace tcp_proxy
{
namespace ip = boost::asio::ip;
typedef ip::tcp::socket socket_type;
class bridge : public boost::enable_shared_from_this<bridge>
{
public:
typedef ip::tcp::socket socket_type;
typedef boost::shared_ptr<bridge> ptr_type;
bridge(boost::asio::io_service& ios)
: downstream_socket_(ios),
upstream_socket_ (ios)
@@ -88,13 +173,11 @@ namespace tcp_proxy
socket_type& downstream_socket()
{
// Client socket
return downstream_socket_;
}
socket_type& upstream_socket()
{
// Remote server socket
return upstream_socket_;
}
@@ -134,8 +217,6 @@ namespace tcp_proxy
close();
}
private:
/*
Section A: Remote Server --> Proxy --> Client
Process data recieved from remote sever then send to client.
@@ -147,7 +228,7 @@ namespace tcp_proxy
{
if (!error)
{
if (filter_data(upstream_data_, bytes_transferred, regex_s_c_b, regex_s_c_w)){
if (filter_data(upstream_data_, bytes_transferred, firewall()->filter_tab.regex_s_c_b, firewall()->filter_tab.regex_s_c_w)){
async_write(downstream_socket_,
boost::asio::buffer(upstream_data_,bytes_transferred),
boost::bind(&bridge::handle_downstream_write,
@@ -190,7 +271,7 @@ namespace tcp_proxy
{
if (!error)
{
if (filter_data(downstream_data_, bytes_transferred, regex_c_s_b, regex_c_s_w)){
if (filter_data(downstream_data_, bytes_transferred, firewall()->filter_tab.regex_c_s_b, firewall()->filter_tab.regex_c_s_w)){
async_write(upstream_socket_,
boost::asio::buffer(downstream_data_,bytes_transferred),
boost::bind(&bridge::handle_upstream_write,
@@ -242,181 +323,155 @@ namespace tcp_proxy
enum { max_data_length = 8192 }; //8KB
unsigned char downstream_data_[max_data_length];
unsigned char upstream_data_ [max_data_length];
boost::mutex mutex_;
public:
class acceptor
{
public:
acceptor(boost::asio::io_service& io_service,
const std::string& local_host, unsigned short local_port,
const std::string& upstream_host, unsigned short upstream_port)
: io_service_(io_service),
localhost_address(boost::asio::ip::address_v4::from_string(local_host)),
acceptor_(io_service_,ip::tcp::endpoint(localhost_address,local_port)),
upstream_port_(upstream_port),
upstream_host_(upstream_host)
{}
bool accept_connections()
{
try
{
session_ = boost::shared_ptr<bridge>(new bridge(io_service_));
acceptor_.async_accept(session_->downstream_socket(),
boost::bind(&acceptor::handle_accept,
this,
boost::asio::placeholders::error));
}
catch(std::exception& e)
{
std::cerr << "acceptor exception: " << e.what() << std::endl;
return false;
}
return true;
}
private:
void handle_accept(const boost::system::error_code& error)
{
if (!error)
{
session_->start(upstream_host_,upstream_port_);
if (!accept_connections())
{
std::cerr << "Failure during call to accept." << std::endl;
}
}
else
{
std::cerr << "Error: " << error.message() << std::endl;
}
}
boost::asio::io_service& io_service_;
ip::address_v4 localhost_address;
ip::tcp::acceptor acceptor_;
ptr_type session_;
unsigned short upstream_port_;
std::string upstream_host_;
};
};
}
class acceptor
{
public:
void push_regex(char* arg, bool case_sensitive, vector<pair<string,boost::regex>> &v){
size_t expr_len = (strlen(arg)-2)/2;
char expr[expr_len];
unhexlify(arg+2, arg+strlen(arg)-1, expr);
if (case_sensitive){
boost::regex regex(reinterpret_cast<char*>(expr),
reinterpret_cast<char*>(expr) + expr_len);
#ifdef DEBUG
cout << "Added case sensitive regex " << expr << endl;
#endif
v.push_back(make_pair(string(arg), regex));
} else {
boost::regex regex(reinterpret_cast<char*>(expr),
reinterpret_cast<char*>(expr) + expr_len, boost::regex::icase);
#ifdef DEBUG
cout << "Added case insensitive regex " << expr << endl;
#endif
v.push_back(make_pair(string(arg), regex));
}
}
acceptor(boost::asio::io_service& io_service,
const std::string& local_host, unsigned short local_port,
const std::string& upstream_host, unsigned short upstream_port)
: io_service_(io_service),
localhost_address(boost::asio::ip::address_v4::from_string(local_host)),
acceptor_(io_service_,ip::tcp::endpoint(localhost_address,local_port)),
upstream_port_(upstream_port),
upstream_host_(upstream_host)
{
boost::asio::socket_base::reuse_address option(true);
acceptor_.set_option(option);
}
void update_regex(){
fstream fd;
fd.open(config_file,ios::in);
if (!fd.is_open()){
std::cerr << "Error: config file couln't be opened" << std::endl;
exit(1);
}
bool accept_connections()
{
try
{
session_ = boost::shared_ptr<bridge>(new bridge(io_service_));
regex_s_c_w.clear();
regex_c_s_w.clear();
regex_s_c_b.clear();
regex_c_s_b.clear();
string line;
while(getline(fd, line)){
char tp[line.length() +1];
strcpy(tp, line.c_str());
if (strlen(tp) >= 2){
bool case_sensitive = true;
if(tp[0] == '0'){
case_sensitive = false;
acceptor_.async_accept(session_->downstream_socket(),
boost::bind(&acceptor::handle_accept,
this,
boost::asio::placeholders::error));
}
switch(tp[1]){
case 'C': { // Client to server Blacklist
push_regex(tp, case_sensitive, regex_c_s_b);
break;
}
case 'c': { // Client to server Whitelist
push_regex(tp, case_sensitive, regex_c_s_w);
break;
}
case 'S': { // Server to client Blacklist
push_regex(tp, case_sensitive, regex_s_c_b);
break;
}
case 's': { // Server to client Whitelist
push_regex(tp, case_sensitive, regex_s_c_w);
break;
catch(std::exception& e)
{
std::cerr << "acceptor exception: " << e.what() << std::endl;
return false;
}
return true;
}
void close(){
cout << "acceptor 1: " << endl;
acceptor_.close();
cout << "acceptor 2: " << endl;
acceptor_.cancel();
cout << "acceptor 3: " << endl;
session_->close();
cout << "acceptor 4: " << endl;
}
private:
void handle_accept(const boost::system::error_code& error)
{
if (!error)
{
session_->start(upstream_host_,upstream_port_);
if (!accept_connections())
{
std::cerr << "Failure during call to accept." << std::endl;
}
}
else
{
std::cerr << "Error: " << error.message() << std::endl;
}
}
}
boost::asio::io_service& io_service_;
ip::address_v4 localhost_address;
ip::tcp::acceptor acceptor_;
boost::shared_ptr<bridge> session_;
unsigned short upstream_port_;
std::string upstream_host_;
};
}
void signal_handler(int signal_num)
{
static void signal_handler(int signal_num){
if (signal_num == SIGUSR1){
#ifdef DEBUG
cout << "Updating configurtation" << endl;
cout << "Updating configurtation: " << gettid() << endl;
#endif
update_regex();
}else if(signal_num == SIGUSR2){
#ifdef DEBUG
cout << "Killed: " << gettid() << endl;
#endif
*(firewall()->status_code) = 0;
#ifdef DEBUG
cout << "Exiting PT1: " << gettid() << endl;
#endif
proxy_map.erase(gettid());
#ifdef DEBUG
cout << "Exiting PT2: " << gettid() << endl;
#endif
//firewall()->acceptor->close();
#ifdef DEBUG
cout << "Exiting PT3: " << gettid() << endl;
#endif
}
}
extern "C" int start_proxy(char* local_host_p, unsigned short local_port, char* forward_host_p, unsigned short forward_port, char* config_file_p, int pid)
{
const std::string local_host = local_host_p;
const std::string forward_host = forward_host_p;
config_file = config_file_p;
extern "C" void start_proxy(
char* local_host,unsigned short local_port,
char* forward_host, unsigned short forward_port,
char* config_file, int* status_code, void (*incrementCallback)(const char *)
){
#ifdef DEBUG
cout << "Starting: " << gettid() << endl;
#endif
regex_proxy tmp;
proxy_map[gettid()] = &tmp;
tmp.config_file = config_file;
tmp.status_code = status_code;
tmp.incrementCallback = incrementCallback;
update_regex();
signal(SIGUSR1, signal_handler);
boost::asio::io_service ios;
signal(SIGUSR1, signal_handler);
signal(SIGUSR2, signal_handler);
try
{
tcp_proxy::bridge::acceptor acceptor(ios,
local_host, local_port,
forward_host, forward_port);
tcp_proxy::acceptor acceptor(ios,
local_host, local_port,
forward_host, forward_port);
firewall()->acceptor = &acceptor;
acceptor.accept_connections();
ios.run();
}
catch(std::exception& e)
{
std::cerr << "Error: " << e.what() << std::endl;
return 1;
*(firewall()->status_code) = 1;
proxy_map.erase(gettid());
return;
}
return 0;
#ifdef DEBUG
cout << "Exiting: " << gettid() << endl;
#endif
*(firewall()->status_code) = 0;
proxy_map.erase(gettid());
}
/*

BIN
backend/proxy/proxy.so
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Binary file not shown.