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The server doesn't need a restart when regex are changed

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This commit is contained in:
nik012003
2022-06-18 11:10:23 +02:00
committed by DomySh
parent a53184c7a0
commit da3e06a5e0
3 changed files with 83 additions and 32 deletions
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94
backend/proxy/proxy.cpp
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@@ -2,6 +2,8 @@
#include <cstddef>
#include <iostream>
#include <string>
#include <csignal>
#include <fstream>
#include <boost/regex.hpp>
#include <boost/shared_ptr.hpp>
@@ -36,6 +38,7 @@ unhexlify(InputIterator first, InputIterator last, OutputIterator ascii) {
}
vector<pair<string,boost::regex>> regex_s_c_w, regex_c_s_w, regex_s_c_b, regex_c_s_b;
const char* config_file;
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
@@ -315,19 +318,74 @@ void push_regex(char* arg, bool case_sensitive, vector<pair<string,boost::regex>
if (case_sensitive){
boost::regex regex(reinterpret_cast<char*>(expr),
reinterpret_cast<char*>(expr) + expr_len);
cout << "Added case sensitive regex " << expr << endl;
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);
cout << "Added case insensitive regex " << expr << endl;
v.push_back(make_pair(string(arg), regex));
}
}
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);
}
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;
}
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;
}
}
}
}
}
void signal_handler(int signal_num)
{
if (signal_num == SIGUSR1){
cout << "Updating configurtation" << endl;
update_regex();
}
}
int main(int argc, char* argv[])
{
if (argc < 5)
if (argc < 6)
{
std::cerr << "usage: tcpproxy_server <local host ip> <local port> <forward host ip> <forward port> 0C..... 1S....." << std::endl;
std::cerr << "usage: tcpproxy_server <local host ip> <local port> <forward host ip> <forward port> <config_file>" << std::endl;
return 1;
}
@@ -335,32 +393,12 @@ int main(int argc, char* argv[])
const unsigned short forward_port = static_cast<unsigned short>(::atoi(argv[4]));
const std::string local_host = argv[1];
const std::string forward_host = argv[3];
for (int i=5;i<argc;i++){
if (strlen(argv[i]) >= 2){
bool case_sensitive = true;
if(argv[i][0] == '0'){
case_sensitive = false;
}
switch(argv[i][1]){
case 'C': { // Client to server Blacklist
push_regex(argv[i], case_sensitive, regex_c_s_b);
break;
}
case 'c': { // Client to server Whitelist
push_regex(argv[i], case_sensitive, regex_c_s_w);
break;
}
case 'S': { // Server to client Blacklist
push_regex(argv[i], case_sensitive, regex_s_c_b);
break;
}
case 's': { // Server to client Whitelist
push_regex(argv[i], case_sensitive, regex_s_c_w);
break;
}
}
}
}
signal(SIGUSR1, signal_handler);\
config_file = argv[5];
update_regex();
boost::asio::io_service ios;