c++ refactoring, init pypi projects, gh action added
This commit is contained in:
Domingo Dirutigliano
@@ -17,181 +17,61 @@ using Tins::TCPIP::Stream;
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using Tins::TCPIP::StreamFollower;
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using namespace std;
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#ifndef NETFILTER_CLASSES_HPP
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#define NETFILTER_CLASSES_HPP
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typedef Tins::TCPIP::StreamIdentifier stream_id;
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typedef map<stream_id, hs_stream_t*> matching_map;
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#ifndef NETFILTER_CLASS_CPP
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#define NETFILTER_CLASS_CPP
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/* Considering to use unorder_map using this hash of stream_id
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typedef int QueueCallbackFunction(const nlmsghdr *, const mnl_socket*, void *);
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namespace std {
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template<>
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struct hash<stream_id> {
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size_t operator()(const stream_id& sid) const
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{
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return std::hash<std::uint32_t>()(sid.max_address[0] + sid.max_address[1] + sid.max_address[2] + sid.max_address[3] + sid.max_address_port + sid.min_address[0] + sid.min_address[1] + sid.min_address[2] + sid.min_address[3] + sid.min_address_port);
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}
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};
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}
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*/
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#ifdef DEBUG
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ostream& operator<<(ostream& os, const Tins::TCPIP::StreamIdentifier::address_type &sid){
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bool first_print = false;
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for (auto ele: sid){
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if (first_print || ele){
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first_print = true;
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os << (int)ele << ".";
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}
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}
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return os;
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}
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ostream& operator<<(ostream& os, const stream_id &sid){
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os << sid.max_address << ":" << sid.max_address_port << " -> " << sid.min_address << ":" << sid.min_address_port;
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return os;
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}
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#endif
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struct packet_info;
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struct tcp_stream_tmp {
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bool matching_has_been_called = false;
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bool result;
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packet_info *pkt_info;
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struct nfqueue_execution_data_tmp{
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mnl_socket* nl = nullptr;
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function<QueueCallbackFunction> queue_cb = nullptr;
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void *data = nullptr;
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};
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struct stream_ctx {
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matching_map in_hs_streams;
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matching_map out_hs_streams;
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hs_scratch_t* in_scratch = nullptr;
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hs_scratch_t* out_scratch = nullptr;
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u_int16_t latest_config_ver = 0;
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StreamFollower follower;
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mnl_socket* nl;
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tcp_stream_tmp tcp_match_util;
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class NfQueueExecutor {
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private:
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size_t BUF_SIZE = 0xffff + (MNL_SOCKET_BUFFER_SIZE/2);
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char *queue_msg_buffer = nullptr;
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QueueCallbackFunction * _queue_callback_hook = nullptr;
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public:
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void clean_scratches(){
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if (out_scratch != nullptr){
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hs_free_scratch(out_scratch);
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out_scratch = nullptr;
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}
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if (in_scratch != nullptr){
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hs_free_scratch(in_scratch);
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in_scratch = nullptr;
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}
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}
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unsigned int portid;
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u_int16_t queue_num;
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mnl_socket* nl = nullptr;
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void clean_stream_by_id(stream_id sid){
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.clean_stream_by_id] Cleaning stream context of " << sid << endl;
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#endif
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auto stream_search = in_hs_streams.find(sid);
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hs_stream_t* stream_match;
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if (stream_search != in_hs_streams.end()){
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stream_match = stream_search->second;
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if (hs_close_stream(stream_match, in_scratch, nullptr, nullptr) != HS_SUCCESS) {
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cerr << "[error] [NetfilterQueue.clean_stream_by_id] Error closing the stream matcher (hs)" << endl;
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throw invalid_argument("Cannot close stream match on hyperscan");
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}
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in_hs_streams.erase(stream_search);
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}
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stream_search = out_hs_streams.find(sid);
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if (stream_search != out_hs_streams.end()){
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stream_match = stream_search->second;
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if (hs_close_stream(stream_match, out_scratch, nullptr, nullptr) != HS_SUCCESS) {
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cerr << "[error] [NetfilterQueue.clean_stream_by_id] Error closing the stream matcher (hs)" << endl;
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throw invalid_argument("Cannot close stream match on hyperscan");
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}
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out_hs_streams.erase(stream_search);
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}
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}
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void clean(){
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.clean] Cleaning stream context" << endl;
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#endif
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if (in_scratch){
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for(auto ele: in_hs_streams){
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if (hs_close_stream(ele.second, in_scratch, nullptr, nullptr) != HS_SUCCESS) {
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cerr << "[error] [NetfilterQueue.clean_stream_by_id] Error closing the stream matcher (hs)" << endl;
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throw invalid_argument("Cannot close stream match on hyperscan");
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}
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}
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in_hs_streams.clear();
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}
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NfQueueExecutor(u_int16_t queue_num, QueueCallbackFunction* queue_cb): queue_num(queue_num), _queue_callback_hook(queue_cb){
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nl = mnl_socket_open(NETLINK_NETFILTER);
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if (out_scratch){
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for(auto ele: out_hs_streams){
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if (hs_close_stream(ele.second, out_scratch, nullptr, nullptr) != HS_SUCCESS) {
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cerr << "[error] [NetfilterQueue.clean_stream_by_id] Error closing the stream matcher (hs)" << endl;
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throw invalid_argument("Cannot close stream match on hyperscan");
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}
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}
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out_hs_streams.clear();
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}
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clean_scratches();
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}
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};
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if (nl == nullptr) { throw runtime_error( "mnl_socket_open" );}
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struct packet_info {
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string packet;
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string payload;
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stream_id sid;
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bool is_input;
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bool is_tcp;
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stream_ctx* sctx;
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};
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typedef bool NetFilterQueueCallback(packet_info &);
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template <NetFilterQueueCallback callback_func>
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class NetfilterQueue {
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public:
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size_t BUF_SIZE = 0xffff + (MNL_SOCKET_BUFFER_SIZE/2);
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char *buf = nullptr;
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unsigned int portid;
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u_int16_t queue_num;
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stream_ctx sctx;
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NetfilterQueue(u_int16_t queue_num): queue_num(queue_num) {
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sctx.nl = mnl_socket_open(NETLINK_NETFILTER);
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if (sctx.nl == nullptr) { throw runtime_error( "mnl_socket_open" );}
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if (mnl_socket_bind(sctx.nl, 0, MNL_SOCKET_AUTOPID) < 0) {
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mnl_socket_close(sctx.nl);
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if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
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mnl_socket_close(nl);
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throw runtime_error( "mnl_socket_bind" );
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}
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portid = mnl_socket_get_portid(sctx.nl);
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portid = mnl_socket_get_portid(nl);
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buf = (char*) malloc(BUF_SIZE);
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queue_msg_buffer = (char*) malloc(BUF_SIZE);
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if (!buf) {
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mnl_socket_close(sctx.nl);
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if (!queue_msg_buffer) {
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mnl_socket_close(nl);
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throw runtime_error( "allocate receive buffer" );
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}
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if (send_config_cmd(NFQNL_CFG_CMD_BIND) < 0) {
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if (_send_config_cmd(NFQNL_CFG_CMD_BIND) < 0) {
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_clear();
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throw runtime_error( "mnl_socket_send" );
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}
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//TEST if BIND was successful
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if (send_config_cmd(NFQNL_CFG_CMD_NONE) < 0) { // SEND A NONE cmmand to generate an error meessage
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if (_send_config_cmd(NFQNL_CFG_CMD_NONE) < 0) { // SEND A NONE cmmand to generate an error meessage
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_clear();
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throw runtime_error( "mnl_socket_send" );
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}
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if (recv_packet() == -1) { //RECV the error message
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if (_recv_packet() == -1) { //RECV the error message
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_clear();
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throw runtime_error( "mnl_socket_recvfrom" );
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}
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struct nlmsghdr *nlh = (struct nlmsghdr *) buf;
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struct nlmsghdr *nlh = (struct nlmsghdr *) queue_msg_buffer;
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if (nlh->nlmsg_type != NLMSG_ERROR) {
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_clear();
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@@ -210,71 +90,32 @@ class NetfilterQueue {
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}
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//END TESTING BIND
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nlh = nfq_nlmsg_put(buf, NFQNL_MSG_CONFIG, queue_num);
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nlh = nfq_nlmsg_put(queue_msg_buffer, NFQNL_MSG_CONFIG, queue_num);
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nfq_nlmsg_cfg_put_params(nlh, NFQNL_COPY_PACKET, 0xffff);
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mnl_attr_put_u32(nlh, NFQA_CFG_FLAGS, htonl(NFQA_CFG_F_GSO));
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mnl_attr_put_u32(nlh, NFQA_CFG_MASK, htonl(NFQA_CFG_F_GSO));
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if (mnl_socket_sendto(sctx.nl, nlh, nlh->nlmsg_len) < 0) {
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if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
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_clear();
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throw runtime_error( "mnl_socket_send" );
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}
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}
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static void on_data_recv(Stream& stream, stream_ctx* sctx, string data) {
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sctx->tcp_match_util.matching_has_been_called = true;
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bool result = callback_func(*sctx->tcp_match_util.pkt_info);
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.on_data_recv] result: " << result << endl;
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#endif
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if (!result){
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.on_data_recv] Stream matched, removing all data about it" << endl;
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#endif
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sctx->clean_stream_by_id(sctx->tcp_match_util.pkt_info->sid);
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stream.ignore_client_data();
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stream.ignore_server_data();
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}
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sctx->tcp_match_util.result = result;
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}
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NfQueueExecutor(u_int16_t queue_num): NfQueueExecutor(queue_num, nullptr) {}
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//Input data filtering
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static void on_client_data(Stream& stream, stream_ctx* sctx) {
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on_data_recv(stream, sctx, string(stream.client_payload().begin(), stream.client_payload().end()));
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}
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// --- Functions to be implemented by the user
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//Server data filtering
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static void on_server_data(Stream& stream, stream_ctx* sctx) {
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on_data_recv(stream, sctx, string(stream.server_payload().begin(), stream.server_payload().end()));
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}
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virtual void before_loop() {
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// Do nothing by default
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}
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static void on_new_stream(Stream& stream, stream_ctx* sctx) {
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.on_new_stream] New stream detected" << endl;
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#endif
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if (stream.is_partial_stream()) {
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.on_new_stream] Partial stream detected, skipping" << endl;
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#endif
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return;
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}
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stream.auto_cleanup_payloads(true);
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stream.client_data_callback(bind(on_client_data, placeholders::_1, sctx));
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stream.server_data_callback(bind(on_server_data, placeholders::_1, sctx));
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stream.stream_closed_callback(bind(on_stream_close, placeholders::_1, sctx));
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}
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// A stream was terminated. The second argument is the reason why it was terminated
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static void on_stream_close(Stream& stream, stream_ctx* sctx) {
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stream_id stream_id = stream_id::make_identifier(stream);
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.on_stream_close] Stream terminated, deleting all data" << endl;
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#endif
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sctx->clean_stream_by_id(stream_id);
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}
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virtual void * callback_data_fetch(){
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return nullptr;
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}
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// --- End of functions to be implemented by the user
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void run(){
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/*
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@@ -283,18 +124,21 @@ class NetfilterQueue {
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* in this information, so turn it off.
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*/
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int ret = 1;
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mnl_socket_setsockopt(sctx.nl, NETLINK_NO_ENOBUFS, &ret, sizeof(int));
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mnl_socket_setsockopt(nl, NETLINK_NO_ENOBUFS, &ret, sizeof(int));
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sctx.follower.new_stream_callback(bind(on_new_stream, placeholders::_1, &sctx));
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sctx.follower.stream_termination_callback(bind(on_stream_close, placeholders::_1, &sctx));
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before_loop();
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for (;;) {
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ret = recv_packet();
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ret = _recv_packet();
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if (ret == -1) {
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throw runtime_error( "mnl_socket_recvfrom" );
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}
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ret = mnl_cb_run(buf, ret, 0, portid, queue_cb, &sctx);
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nfqueue_execution_data_tmp data = {
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nl: nl,
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queue_cb: _queue_callback_hook,
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data: callback_data_fetch()
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};
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ret = mnl_cb_run(queue_msg_buffer, ret, 0, portid, _real_queue_cb, &data);
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if (ret < 0){
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throw runtime_error( "mnl_cb_run" );
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}
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@@ -302,170 +146,46 @@ class NetfilterQueue {
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}
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~NetfilterQueue() {
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.~NetfilterQueue] Destructor called" << endl;
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#endif
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send_config_cmd(NFQNL_CFG_CMD_UNBIND);
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~NfQueueExecutor() {
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_send_config_cmd(NFQNL_CFG_CMD_UNBIND);
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_clear();
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}
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private:
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private:
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ssize_t send_config_cmd(nfqnl_msg_config_cmds cmd){
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struct nlmsghdr *nlh = nfq_nlmsg_put(buf, NFQNL_MSG_CONFIG, queue_num);
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static int _real_queue_cb(const nlmsghdr *nlh, void *data_ptr) {
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nfqueue_execution_data_tmp* info = (nfqueue_execution_data_tmp*) data_ptr;
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if (info->queue_cb == nullptr) return MNL_CB_OK;
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return info->queue_cb(nlh, info->nl, info->data);
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}
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inline void _clear(){
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if (queue_msg_buffer != nullptr) {
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free(queue_msg_buffer);
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queue_msg_buffer = nullptr;
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}
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mnl_socket_close(nl);
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nl = nullptr;
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}
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inline ssize_t _send_config_cmd(nfqnl_msg_config_cmds cmd){
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struct nlmsghdr *nlh = nfq_nlmsg_put(queue_msg_buffer, NFQNL_MSG_CONFIG, queue_num);
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nfq_nlmsg_cfg_put_cmd(nlh, AF_INET, cmd);
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return mnl_socket_sendto(sctx.nl, nlh, nlh->nlmsg_len);
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return mnl_socket_sendto(nl, nlh, nlh->nlmsg_len);
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}
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ssize_t recv_packet(){
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return mnl_socket_recvfrom(sctx.nl, buf, BUF_SIZE);
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inline ssize_t _recv_packet(){
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return mnl_socket_recvfrom(nl, queue_msg_buffer, BUF_SIZE);
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}
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void _clear(){
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if (buf != nullptr) {
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free(buf);
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buf = nullptr;
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}
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mnl_socket_close(sctx.nl);
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sctx.nl = nullptr;
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sctx.clean();
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}
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template<typename T>
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static void build_verdict(T packet, uint8_t *payload, uint16_t plen, nlmsghdr *nlh_verdict, nfqnl_msg_packet_hdr *ph, stream_ctx* sctx, bool is_input){
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Tins::TCP* tcp = packet.template find_pdu<Tins::TCP>();
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if (tcp){
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Tins::PDU* application_layer = tcp->inner_pdu();
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u_int16_t payload_size = 0;
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if (application_layer != nullptr){
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payload_size = application_layer->size();
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}
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packet_info pktinfo{
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packet: string(payload, payload+plen),
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payload: string(payload+plen - payload_size, payload+plen),
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sid: stream_id::make_identifier(packet),
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is_input: is_input,
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is_tcp: true,
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sctx: sctx,
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};
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sctx->tcp_match_util.matching_has_been_called = false;
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sctx->tcp_match_util.pkt_info = &pktinfo;
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#ifdef DEBUG
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cerr << "[DEBUG] [NetfilterQueue.build_verdict] TCP Packet received " << packet.src_addr() << ":" << tcp->sport() << " -> " << packet.dst_addr() << ":" << tcp->dport() << " thr: " << this_thread::get_id() << ", sending to libtins StreamFollower" << endl;
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#endif
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sctx->follower.process_packet(packet);
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#ifdef DEBUG
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if (sctx->tcp_match_util.matching_has_been_called){
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cerr << "[DEBUG] [NetfilterQueue.build_verdict] StreamFollower has called matching functions" << endl;
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}else{
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cerr << "[DEBUG] [NetfilterQueue.build_verdict] StreamFollower has NOT called matching functions" << endl;
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}
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#endif
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if (sctx->tcp_match_util.matching_has_been_called && !sctx->tcp_match_util.result){
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Tins::PDU* data_layer = tcp->release_inner_pdu();
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if (data_layer != nullptr){
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delete data_layer;
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}
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tcp->set_flag(Tins::TCP::FIN,1);
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tcp->set_flag(Tins::TCP::ACK,1);
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tcp->set_flag(Tins::TCP::SYN,0);
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nfq_nlmsg_verdict_put_pkt(nlh_verdict, packet.serialize().data(), packet.size());
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}
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nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_ACCEPT );
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}else{
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Tins::UDP* udp = packet.template find_pdu<Tins::UDP>();
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if (!udp){
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throw invalid_argument("Only TCP and UDP are supported");
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}
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Tins::PDU* application_layer = udp->inner_pdu();
|
||||
u_int16_t payload_size = 0;
|
||||
if (application_layer != nullptr){
|
||||
payload_size = application_layer->size();
|
||||
}
|
||||
if((udp->inner_pdu() == nullptr)){
|
||||
nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_ACCEPT );
|
||||
}
|
||||
packet_info pktinfo{
|
||||
packet: string(payload, payload+plen),
|
||||
payload: string(payload+plen - payload_size, payload+plen),
|
||||
sid: stream_id::make_identifier(packet),
|
||||
is_input: is_input,
|
||||
is_tcp: false,
|
||||
sctx: sctx,
|
||||
};
|
||||
if (callback_func(pktinfo)){
|
||||
nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_ACCEPT );
|
||||
}else{
|
||||
nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_DROP );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int queue_cb(const nlmsghdr *nlh, void *data_ptr)
|
||||
{
|
||||
stream_ctx* sctx = (stream_ctx*)data_ptr;
|
||||
|
||||
//Extract attributes from the nlmsghdr
|
||||
nlattr *attr[NFQA_MAX+1] = {};
|
||||
|
||||
if (nfq_nlmsg_parse(nlh, attr) < 0) {
|
||||
perror("problems parsing");
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
if (attr[NFQA_PACKET_HDR] == nullptr) {
|
||||
fputs("metaheader not set\n", stderr);
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
if (attr[NFQA_MARK] == nullptr) {
|
||||
fputs("mark not set\n", stderr);
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
//Get Payload
|
||||
uint16_t plen = mnl_attr_get_payload_len(attr[NFQA_PAYLOAD]);
|
||||
uint8_t *payload = (uint8_t *)mnl_attr_get_payload(attr[NFQA_PAYLOAD]);
|
||||
|
||||
//Return result to the kernel
|
||||
struct nfqnl_msg_packet_hdr *ph = (nfqnl_msg_packet_hdr*) mnl_attr_get_payload(attr[NFQA_PACKET_HDR]);
|
||||
struct nfgenmsg *nfg = (nfgenmsg *)mnl_nlmsg_get_payload(nlh);
|
||||
char buf[MNL_SOCKET_BUFFER_SIZE];
|
||||
struct nlmsghdr *nlh_verdict;
|
||||
struct nlattr *nest;
|
||||
|
||||
nlh_verdict = nfq_nlmsg_put(buf, NFQNL_MSG_VERDICT, ntohs(nfg->res_id));
|
||||
|
||||
bool is_input = ntohl(mnl_attr_get_u32(attr[NFQA_MARK])) & 0x1; // == 0x1337 that is odd
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.queue_cb] Packet received" << endl;
|
||||
cerr << "[DEBUG] [NetfilterQueue.queue_cb] Packet ID: " << ntohl(ph->packet_id) << endl;
|
||||
cerr << "[DEBUG] [NetfilterQueue.queue_cb] Payload size: " << plen << endl;
|
||||
cerr << "[DEBUG] [NetfilterQueue.queue_cb] Is input: " << is_input << endl;
|
||||
#endif
|
||||
|
||||
// Check IP protocol version
|
||||
if ( (payload[0] & 0xf0) == 0x40 ){
|
||||
build_verdict(Tins::IP(payload, plen), payload, plen, nlh_verdict, ph, sctx, is_input);
|
||||
}else{
|
||||
build_verdict(Tins::IPv6(payload, plen), payload, plen, nlh_verdict, ph, sctx, is_input);
|
||||
}
|
||||
|
||||
nest = mnl_attr_nest_start(nlh_verdict, NFQA_CT);
|
||||
mnl_attr_put_u32(nlh_verdict, CTA_MARK, htonl(42));
|
||||
mnl_attr_nest_end(nlh_verdict, nest);
|
||||
|
||||
if (mnl_socket_sendto(sctx->nl, nlh_verdict, nlh_verdict->nlmsg_len) < 0) {
|
||||
throw runtime_error( "mnl_socket_send" );
|
||||
}
|
||||
|
||||
return MNL_CB_OK;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
template <NetFilterQueueCallback func>
|
||||
|
||||
template <typename Executor, typename = enable_if_t<is_base_of_v<NfQueueExecutor, Executor>>>
|
||||
class NFQueueSequence{
|
||||
|
||||
private:
|
||||
vector<NetfilterQueue<func> *> nfq;
|
||||
vector<Executor *> nfq;
|
||||
uint16_t _init;
|
||||
uint16_t _end;
|
||||
vector<thread> threads;
|
||||
@@ -474,7 +194,7 @@ class NFQueueSequence{
|
||||
|
||||
NFQueueSequence(uint16_t seq_len){
|
||||
if (seq_len <= 0) throw invalid_argument("seq_len <= 0");
|
||||
nfq = vector<NetfilterQueue<func>*>(seq_len);
|
||||
nfq = vector<Executor*>(seq_len);
|
||||
_init = QUEUE_BASE_NUM;
|
||||
while(nfq[0] == nullptr){
|
||||
if (_init+seq_len-1 >= 65536){
|
||||
@@ -482,7 +202,7 @@ class NFQueueSequence{
|
||||
}
|
||||
for (int i=0;i<seq_len;i++){
|
||||
try{
|
||||
nfq[i] = new NetfilterQueue<func>(_init+i);
|
||||
nfq[i] = new Executor(_init+i);
|
||||
}catch(const invalid_argument e){
|
||||
for(int j = 0; j < i; j++) {
|
||||
delete nfq[j];
|
||||
@@ -499,7 +219,9 @@ class NFQueueSequence{
|
||||
void start(){
|
||||
if (threads.size() != 0) throw runtime_error("NFQueueSequence: already started!");
|
||||
for (int i=0;i<nfq.size();i++){
|
||||
threads.push_back(thread(&NetfilterQueue<func>::run, nfq[i]));
|
||||
threads.push_back(thread([executor = nfq[i]](){
|
||||
executor->run();
|
||||
}));
|
||||
}
|
||||
}
|
||||
|
||||
@@ -524,4 +246,4 @@ class NFQueueSequence{
|
||||
}
|
||||
};
|
||||
|
||||
#endif // NETFILTER_CLASSES_HPP
|
||||
#endif // NETFILTER_CLASS_CPP
|
||||
20
backend/binsrc/nfproxy-tun.cpp
Normal file
20
backend/binsrc/nfproxy-tun.cpp
Normal file
@@ -0,0 +1,20 @@
|
||||
#include "proxytun/proxytun.cpp"
|
||||
#include "utils.hpp"
|
||||
#include <iostream>
|
||||
#include <syncstream>
|
||||
|
||||
using namespace std;
|
||||
|
||||
int main(int argc, char *argv[]){
|
||||
int n_of_threads = 1;
|
||||
char * n_threads_str = getenv("NTHREADS");
|
||||
if (n_threads_str != nullptr) n_of_threads = ::atoi(n_threads_str);
|
||||
if(n_of_threads <= 0) n_of_threads = 1;
|
||||
|
||||
NFQueueSequence<SocketTunnelQueue> queues(n_of_threads);
|
||||
queues.start();
|
||||
|
||||
osyncstream(cout) << "QUEUES " << queues.init() << " " << queues.end() << endl;
|
||||
cerr << "[info] [main] Queues: " << queues.init() << ":" << queues.end() << " threads assigned: " << n_of_threads << endl;
|
||||
|
||||
}
|
||||
@@ -1,12 +1,11 @@
|
||||
#include "classes/regex_rules.cpp"
|
||||
#include "regex/regex_rules.cpp"
|
||||
#include "regex/regexfilter.cpp"
|
||||
#include "classes/netfilter.cpp"
|
||||
#include "utils.hpp"
|
||||
#include <syncstream>
|
||||
#include <iostream>
|
||||
|
||||
using namespace std;
|
||||
|
||||
shared_ptr<RegexRules> regex_config;
|
||||
|
||||
void config_updater (){
|
||||
string line;
|
||||
while (true){
|
||||
@@ -33,124 +32,15 @@ void config_updater (){
|
||||
try{
|
||||
regex_config.reset(new RegexRules(raw_rules, regex_config->stream_mode()));
|
||||
cerr << "[info] [updater] Config update done to ver "<< regex_config->ver() << endl;
|
||||
cout << "ACK OK" << endl;
|
||||
osyncstream(cout) << "ACK OK" << endl;
|
||||
}catch(const std::exception& e){
|
||||
cerr << "[error] [updater] Failed to build new configuration!" << endl;
|
||||
cout << "ACK FAIL " << e.what() << endl;
|
||||
osyncstream(cout) << "ACK FAIL " << e.what() << endl;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void inline scratch_setup(regex_ruleset &conf, hs_scratch_t* & scratch){
|
||||
if (scratch == nullptr && conf.hs_db != nullptr){
|
||||
if (hs_alloc_scratch(conf.hs_db, &scratch) != HS_SUCCESS) {
|
||||
throw invalid_argument("Cannot alloc scratch");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct matched_data{
|
||||
unsigned int matched = 0;
|
||||
bool has_matched = false;
|
||||
};
|
||||
|
||||
|
||||
bool filter_callback(packet_info& info){
|
||||
shared_ptr<RegexRules> conf = regex_config;
|
||||
auto current_version = conf->ver();
|
||||
if (current_version != info.sctx->latest_config_ver){
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Configuration has changed (" << current_version << "!=" << info.sctx->latest_config_ver << "), cleaning scratch spaces" << endl;
|
||||
#endif
|
||||
info.sctx->clean();
|
||||
info.sctx->latest_config_ver = current_version;
|
||||
}
|
||||
scratch_setup(conf->input_ruleset, info.sctx->in_scratch);
|
||||
scratch_setup(conf->output_ruleset, info.sctx->out_scratch);
|
||||
|
||||
hs_database_t* regex_matcher = info.is_input ? conf->input_ruleset.hs_db : conf->output_ruleset.hs_db;
|
||||
if (regex_matcher == nullptr){
|
||||
return true;
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Matching packet with " << (info.is_input ? "input" : "output") << " ruleset" << endl;
|
||||
#endif
|
||||
|
||||
matched_data match_res;
|
||||
hs_error_t err;
|
||||
hs_scratch_t* scratch_space = info.is_input ? info.sctx->in_scratch: info.sctx->out_scratch;
|
||||
auto match_func = [](unsigned int id, auto from, auto to, auto flags, auto ctx){
|
||||
auto res = (matched_data*)ctx;
|
||||
res->has_matched = true;
|
||||
res->matched = id;
|
||||
return -1; // Stop matching
|
||||
};
|
||||
hs_stream_t* stream_match;
|
||||
if (conf->stream_mode()){
|
||||
matching_map* match_map = info.is_input ? &info.sctx->in_hs_streams : &info.sctx->out_hs_streams;
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Dumping match_map " << match_map << endl;
|
||||
for (auto ele: *match_map){
|
||||
cerr << "[DEBUG] [filter_callback] " << ele.first << " -> " << ele.second << endl;
|
||||
}
|
||||
cerr << "[DEBUG] [filter_callback] End of match_map" << endl;
|
||||
#endif
|
||||
auto stream_search = match_map->find(info.sid);
|
||||
|
||||
if (stream_search == match_map->end()){
|
||||
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Creating new stream matcher for " << info.sid << endl;
|
||||
#endif
|
||||
if (hs_open_stream(regex_matcher, 0, &stream_match) != HS_SUCCESS) {
|
||||
cerr << "[error] [filter_callback] Error opening the stream matcher (hs)" << endl;
|
||||
throw invalid_argument("Cannot open stream match on hyperscan");
|
||||
}
|
||||
if (info.is_tcp){
|
||||
match_map->insert_or_assign(info.sid, stream_match);
|
||||
}
|
||||
}else{
|
||||
stream_match = stream_search->second;
|
||||
}
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Matching as a stream" << endl;
|
||||
#endif
|
||||
err = hs_scan_stream(
|
||||
stream_match,info.payload.c_str(), info.payload.length(),
|
||||
0, scratch_space, match_func, &match_res
|
||||
);
|
||||
}else{
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Matching as a block" << endl;
|
||||
#endif
|
||||
err = hs_scan(
|
||||
regex_matcher,info.payload.c_str(), info.payload.length(),
|
||||
0, scratch_space, match_func, &match_res
|
||||
);
|
||||
}
|
||||
if (
|
||||
!info.is_tcp && conf->stream_mode() &&
|
||||
hs_close_stream(stream_match, scratch_space, nullptr, nullptr) != HS_SUCCESS
|
||||
){
|
||||
cerr << "[error] [filter_callback] Error closing the stream matcher (hs)" << endl;
|
||||
throw invalid_argument("Cannot close stream match on hyperscan");
|
||||
}
|
||||
if (err != HS_SUCCESS && err != HS_SCAN_TERMINATED) {
|
||||
cerr << "[error] [filter_callback] Error while matching the stream (hs)" << endl;
|
||||
throw invalid_argument("Error while matching the stream with hyperscan");
|
||||
}
|
||||
if (match_res.has_matched){
|
||||
auto rules_vector = info.is_input ? conf->input_ruleset.regexes : conf->output_ruleset.regexes;
|
||||
stringstream msg;
|
||||
msg << "BLOCKED " << rules_vector[match_res.matched] << "\n";
|
||||
cout << msg.str() << flush;
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[]){
|
||||
int n_of_threads = 1;
|
||||
char * n_threads_str = getenv("NTHREADS");
|
||||
@@ -165,10 +55,10 @@ int main(int argc, char *argv[]){
|
||||
|
||||
regex_config.reset(new RegexRules(stream_mode));
|
||||
|
||||
NFQueueSequence<filter_callback> queues(n_of_threads);
|
||||
NFQueueSequence<RegexQueue> queues(n_of_threads);
|
||||
queues.start();
|
||||
|
||||
cout << "QUEUES " << queues.init() << " " << queues.end() << endl;
|
||||
osyncstream(cout) << "QUEUES " << queues.init() << " " << queues.end() << endl;
|
||||
cerr << "[info] [main] Queues: " << queues.init() << ":" << queues.end() << " threads assigned: " << n_of_threads << " stream mode: " << stream_mode << endl;
|
||||
|
||||
config_updater();
|
||||
|
||||
142
backend/binsrc/proxytun/proxytun.cpp
Normal file
142
backend/binsrc/proxytun/proxytun.cpp
Normal file
@@ -0,0 +1,142 @@
|
||||
#ifndef PROXY_TUNNEL_CPP
|
||||
#define PROXY_TUNNEL_CPP
|
||||
|
||||
#include <linux/netfilter/nfnetlink_queue.h>
|
||||
#include <libnetfilter_queue/libnetfilter_queue.h>
|
||||
#include <linux/netfilter/nfnetlink_conntrack.h>
|
||||
#include <tins/tins.h>
|
||||
#include <tins/tcp_ip/stream_follower.h>
|
||||
#include <tins/tcp_ip/stream_identifier.h>
|
||||
#include <libmnl/libmnl.h>
|
||||
#include <linux/netfilter.h>
|
||||
#include <linux/netfilter/nfnetlink.h>
|
||||
#include <linux/types.h>
|
||||
#include <stdexcept>
|
||||
#include <iostream>
|
||||
#include "../classes/netfilter.cpp"
|
||||
#include <functional>
|
||||
|
||||
using Tins::TCPIP::Stream;
|
||||
using Tins::TCPIP::StreamFollower;
|
||||
using namespace std;
|
||||
|
||||
typedef Tins::TCPIP::StreamIdentifier stream_id;
|
||||
|
||||
class SocketTunnelQueue: public NfQueueExecutor {
|
||||
public:
|
||||
|
||||
StreamFollower follower;
|
||||
|
||||
void before_loop() override {
|
||||
follower.new_stream_callback(bind(on_new_stream, placeholders::_1));
|
||||
follower.stream_termination_callback(bind(on_stream_close, placeholders::_1));
|
||||
}
|
||||
|
||||
void * callback_data_fetch() override{
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
static bool filter_action(){
|
||||
return true;
|
||||
}
|
||||
|
||||
static void on_data_recv(Stream& stream, string data, bool is_input) {
|
||||
bool result = filter_action();
|
||||
if (!result){
|
||||
stream.ignore_client_data();
|
||||
stream.ignore_server_data();
|
||||
}
|
||||
}
|
||||
|
||||
//Input data filtering
|
||||
static void on_client_data(Stream& stream) {
|
||||
on_data_recv(stream, string(stream.client_payload().begin(), stream.client_payload().end()), true);
|
||||
}
|
||||
|
||||
//Server data filtering
|
||||
static void on_server_data(Stream& stream) {
|
||||
on_data_recv(stream, string(stream.server_payload().begin(), stream.server_payload().end()), false);
|
||||
}
|
||||
|
||||
|
||||
// A stream was terminated. The second argument is the reason why it was terminated
|
||||
static void on_stream_close(Stream& stream) {
|
||||
stream_id stream_id = stream_id::make_identifier(stream);
|
||||
}
|
||||
|
||||
static void on_new_stream(Stream& stream) {
|
||||
stream.auto_cleanup_payloads(true);
|
||||
if (stream.is_partial_stream()) {
|
||||
return;
|
||||
}
|
||||
stream.client_data_callback(bind(on_client_data, placeholders::_1));
|
||||
stream.server_data_callback(bind(on_server_data, placeholders::_1));
|
||||
stream.stream_closed_callback(bind(on_stream_close, placeholders::_1));
|
||||
}
|
||||
|
||||
|
||||
template<typename T>
|
||||
static void build_verdict(T packet, uint8_t *payload, uint16_t plen, nlmsghdr *nlh_verdict, nfqnl_msg_packet_hdr *ph){
|
||||
sctx->tcp_match_util.matching_has_been_called = false;
|
||||
sctx->follower.process_packet(packet);
|
||||
if (sctx->tcp_match_util.matching_has_been_called && !sctx->tcp_match_util.result){
|
||||
Tins::PDU* data_layer = tcp->release_inner_pdu();
|
||||
if (data_layer != nullptr){
|
||||
delete data_layer;
|
||||
}
|
||||
tcp->set_flag(Tins::TCP::FIN,1);
|
||||
tcp->set_flag(Tins::TCP::ACK,1);
|
||||
tcp->set_flag(Tins::TCP::SYN,0);
|
||||
nfq_nlmsg_verdict_put_pkt(nlh_verdict, packet.serialize().data(), packet.size());
|
||||
}
|
||||
nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_ACCEPT );
|
||||
}
|
||||
|
||||
static int queue_cb(const nlmsghdr *nlh, const mnl_socket* nl, void *data_ptr) {
|
||||
|
||||
//Extract attributes from the nlmsghdr
|
||||
nlattr *attr[NFQA_MAX+1] = {};
|
||||
|
||||
if (nfq_nlmsg_parse(nlh, attr) < 0) {
|
||||
perror("problems parsing");
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
if (attr[NFQA_PACKET_HDR] == nullptr) {
|
||||
fputs("metaheader not set\n", stderr);
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
//Get Payload
|
||||
uint16_t plen = mnl_attr_get_payload_len(attr[NFQA_PAYLOAD]);
|
||||
uint8_t *payload = (uint8_t *)mnl_attr_get_payload(attr[NFQA_PAYLOAD]);
|
||||
|
||||
//Return result to the kernel
|
||||
struct nfqnl_msg_packet_hdr *ph = (nfqnl_msg_packet_hdr*) mnl_attr_get_payload(attr[NFQA_PACKET_HDR]);
|
||||
struct nfgenmsg *nfg = (nfgenmsg *)mnl_nlmsg_get_payload(nlh);
|
||||
char buf[MNL_SOCKET_BUFFER_SIZE];
|
||||
struct nlmsghdr *nlh_verdict;
|
||||
|
||||
nlh_verdict = nfq_nlmsg_put(buf, NFQNL_MSG_VERDICT, ntohs(nfg->res_id));
|
||||
|
||||
// Check IP protocol version
|
||||
if ( (payload[0] & 0xf0) == 0x40 ){
|
||||
build_verdict(Tins::IP(payload, plen), payload, plen, nlh_verdict, ph);
|
||||
}else{
|
||||
build_verdict(Tins::IPv6(payload, plen), payload, plen, nlh_verdict, ph);
|
||||
}
|
||||
|
||||
if (mnl_socket_sendto(nl, nlh_verdict, nlh_verdict->nlmsg_len) < 0) {
|
||||
throw runtime_error( "mnl_socket_send" );
|
||||
}
|
||||
|
||||
return MNL_CB_OK;
|
||||
}
|
||||
|
||||
SocketTunnelQueue(int queue) : NfQueueExecutor(queue, &queue_cb) {}
|
||||
|
||||
~SocketTunnelQueue() {
|
||||
// TODO
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
#endif // PROXY_TUNNEL_CPP
|
||||
@@ -1,15 +1,16 @@
|
||||
#ifndef REGEX_FILTER_CPP
|
||||
#define REGEX_FILTER_CPP
|
||||
|
||||
#include <iostream>
|
||||
#include <cstring>
|
||||
#include <sstream>
|
||||
#include "../utils.hpp"
|
||||
#include <vector>
|
||||
#include <hs.h>
|
||||
#include <memory>
|
||||
|
||||
using namespace std;
|
||||
|
||||
#ifndef REGEX_FILTER_HPP
|
||||
#define REGEX_FILTER_HPP
|
||||
|
||||
enum FilterDirection{ CTOS, STOC };
|
||||
|
||||
struct decoded_regex {
|
||||
@@ -170,5 +171,20 @@ class RegexRules{
|
||||
}
|
||||
};
|
||||
|
||||
#endif // REGEX_FILTER_HPP
|
||||
shared_ptr<RegexRules> regex_config;
|
||||
|
||||
void inline scratch_setup(regex_ruleset &conf, hs_scratch_t* & scratch){
|
||||
if (scratch == nullptr && conf.hs_db != nullptr){
|
||||
if (hs_alloc_scratch(conf.hs_db, &scratch) != HS_SUCCESS) {
|
||||
throw invalid_argument("Cannot alloc scratch");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct matched_data{
|
||||
unsigned int matched = 0;
|
||||
bool has_matched = false;
|
||||
};
|
||||
|
||||
#endif // REGEX_FILTER_CPP
|
||||
|
||||
321
backend/binsrc/regex/regexfilter.cpp
Normal file
321
backend/binsrc/regex/regexfilter.cpp
Normal file
@@ -0,0 +1,321 @@
|
||||
#ifndef REGEX_FILTER_CLASS_CPP
|
||||
#define REGEX_FILTER_CLASS_CPP
|
||||
|
||||
#include <linux/netfilter/nfnetlink_queue.h>
|
||||
#include <libnetfilter_queue/libnetfilter_queue.h>
|
||||
#include <linux/netfilter/nfnetlink_conntrack.h>
|
||||
#include <tins/tins.h>
|
||||
#include <tins/tcp_ip/stream_follower.h>
|
||||
#include <tins/tcp_ip/stream_identifier.h>
|
||||
#include <libmnl/libmnl.h>
|
||||
#include <linux/netfilter.h>
|
||||
#include <linux/netfilter/nfnetlink.h>
|
||||
#include <linux/types.h>
|
||||
#include <stdexcept>
|
||||
#include <thread>
|
||||
#include <hs.h>
|
||||
#include <syncstream>
|
||||
#include <iostream>
|
||||
#include "../classes/netfilter.cpp"
|
||||
#include "stream_ctx.cpp"
|
||||
#include "regex_rules.cpp"
|
||||
|
||||
using Tins::TCPIP::Stream;
|
||||
using Tins::TCPIP::StreamFollower;
|
||||
using namespace std;
|
||||
|
||||
class RegexQueue: public NfQueueExecutor {
|
||||
public:
|
||||
stream_ctx sctx;
|
||||
|
||||
void before_loop() override {
|
||||
sctx.follower.new_stream_callback(bind(on_new_stream, placeholders::_1, &sctx));
|
||||
sctx.follower.stream_termination_callback(bind(on_stream_close, placeholders::_1, &sctx));
|
||||
}
|
||||
|
||||
void * callback_data_fetch() override{
|
||||
return &sctx;
|
||||
}
|
||||
|
||||
static bool filter_action(packet_info& info){
|
||||
shared_ptr<RegexRules> conf = regex_config;
|
||||
auto current_version = conf->ver();
|
||||
if (current_version != info.sctx->latest_config_ver){
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Configuration has changed (" << current_version << "!=" << info.sctx->latest_config_ver << "), cleaning scratch spaces" << endl;
|
||||
#endif
|
||||
info.sctx->clean();
|
||||
info.sctx->latest_config_ver = current_version;
|
||||
}
|
||||
scratch_setup(conf->input_ruleset, info.sctx->in_scratch);
|
||||
scratch_setup(conf->output_ruleset, info.sctx->out_scratch);
|
||||
|
||||
hs_database_t* regex_matcher = info.is_input ? conf->input_ruleset.hs_db : conf->output_ruleset.hs_db;
|
||||
if (regex_matcher == nullptr){
|
||||
return true;
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Matching packet with " << (info.is_input ? "input" : "output") << " ruleset" << endl;
|
||||
#endif
|
||||
|
||||
matched_data match_res;
|
||||
hs_error_t err;
|
||||
hs_scratch_t* scratch_space = info.is_input ? info.sctx->in_scratch: info.sctx->out_scratch;
|
||||
auto match_func = [](unsigned int id, auto from, auto to, auto flags, auto ctx){
|
||||
auto res = (matched_data*)ctx;
|
||||
res->has_matched = true;
|
||||
res->matched = id;
|
||||
return -1; // Stop matching
|
||||
};
|
||||
hs_stream_t* stream_match;
|
||||
if (conf->stream_mode()){
|
||||
matching_map* match_map = info.is_input ? &info.sctx->in_hs_streams : &info.sctx->out_hs_streams;
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Dumping match_map " << match_map << endl;
|
||||
for (auto ele: *match_map){
|
||||
cerr << "[DEBUG] [filter_callback] " << ele.first << " -> " << ele.second << endl;
|
||||
}
|
||||
cerr << "[DEBUG] [filter_callback] End of match_map" << endl;
|
||||
#endif
|
||||
auto stream_search = match_map->find(info.sid);
|
||||
|
||||
if (stream_search == match_map->end()){
|
||||
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Creating new stream matcher for " << info.sid << endl;
|
||||
#endif
|
||||
if (hs_open_stream(regex_matcher, 0, &stream_match) != HS_SUCCESS) {
|
||||
cerr << "[error] [filter_callback] Error opening the stream matcher (hs)" << endl;
|
||||
throw invalid_argument("Cannot open stream match on hyperscan");
|
||||
}
|
||||
if (info.is_tcp){
|
||||
match_map->insert_or_assign(info.sid, stream_match);
|
||||
}
|
||||
}else{
|
||||
stream_match = stream_search->second;
|
||||
}
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Matching as a stream" << endl;
|
||||
#endif
|
||||
err = hs_scan_stream(
|
||||
stream_match,info.payload.c_str(), info.payload.length(),
|
||||
0, scratch_space, match_func, &match_res
|
||||
);
|
||||
}else{
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [filter_callback] Matching as a block" << endl;
|
||||
#endif
|
||||
err = hs_scan(
|
||||
regex_matcher,info.payload.c_str(), info.payload.length(),
|
||||
0, scratch_space, match_func, &match_res
|
||||
);
|
||||
}
|
||||
if (
|
||||
!info.is_tcp && conf->stream_mode() &&
|
||||
hs_close_stream(stream_match, scratch_space, nullptr, nullptr) != HS_SUCCESS
|
||||
){
|
||||
cerr << "[error] [filter_callback] Error closing the stream matcher (hs)" << endl;
|
||||
throw invalid_argument("Cannot close stream match on hyperscan");
|
||||
}
|
||||
if (err != HS_SUCCESS && err != HS_SCAN_TERMINATED) {
|
||||
cerr << "[error] [filter_callback] Error while matching the stream (hs)" << endl;
|
||||
throw invalid_argument("Error while matching the stream with hyperscan");
|
||||
}
|
||||
if (match_res.has_matched){
|
||||
auto rules_vector = info.is_input ? conf->input_ruleset.regexes : conf->output_ruleset.regexes;
|
||||
stringstream msg;
|
||||
msg << "BLOCKED " << rules_vector[match_res.matched] << "\n";
|
||||
osyncstream(cout) << msg.str() << flush;
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static void on_data_recv(Stream& stream, stream_ctx* sctx, string data) {
|
||||
sctx->tcp_match_util.matching_has_been_called = true;
|
||||
bool result = filter_action(*sctx->tcp_match_util.pkt_info);
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.on_data_recv] result: " << result << endl;
|
||||
#endif
|
||||
if (!result){
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.on_data_recv] Stream matched, removing all data about it" << endl;
|
||||
#endif
|
||||
sctx->clean_stream_by_id(sctx->tcp_match_util.pkt_info->sid);
|
||||
stream.ignore_client_data();
|
||||
stream.ignore_server_data();
|
||||
}
|
||||
sctx->tcp_match_util.result = result;
|
||||
}
|
||||
|
||||
//Input data filtering
|
||||
static void on_client_data(Stream& stream, stream_ctx* sctx) {
|
||||
on_data_recv(stream, sctx, string(stream.client_payload().begin(), stream.client_payload().end()));
|
||||
}
|
||||
|
||||
//Server data filtering
|
||||
static void on_server_data(Stream& stream, stream_ctx* sctx) {
|
||||
on_data_recv(stream, sctx, string(stream.server_payload().begin(), stream.server_payload().end()));
|
||||
}
|
||||
|
||||
|
||||
// A stream was terminated. The second argument is the reason why it was terminated
|
||||
static void on_stream_close(Stream& stream, stream_ctx* sctx) {
|
||||
stream_id stream_id = stream_id::make_identifier(stream);
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.on_stream_close] Stream terminated, deleting all data" << endl;
|
||||
#endif
|
||||
sctx->clean_stream_by_id(stream_id);
|
||||
}
|
||||
|
||||
static void on_new_stream(Stream& stream, stream_ctx* sctx) {
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.on_new_stream] New stream detected" << endl;
|
||||
#endif
|
||||
stream.auto_cleanup_payloads(true);
|
||||
if (stream.is_partial_stream()) {
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.on_new_stream] Partial stream detected, skipping" << endl;
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
stream.client_data_callback(bind(on_client_data, placeholders::_1, sctx));
|
||||
stream.server_data_callback(bind(on_server_data, placeholders::_1, sctx));
|
||||
stream.stream_closed_callback(bind(on_stream_close, placeholders::_1, sctx));
|
||||
}
|
||||
|
||||
|
||||
template<typename T>
|
||||
static void build_verdict(T packet, uint8_t *payload, uint16_t plen, nlmsghdr *nlh_verdict, nfqnl_msg_packet_hdr *ph, stream_ctx* sctx, bool is_input){
|
||||
Tins::TCP* tcp = packet.template find_pdu<Tins::TCP>();
|
||||
|
||||
if (tcp){
|
||||
Tins::PDU* application_layer = tcp->inner_pdu();
|
||||
u_int16_t payload_size = 0;
|
||||
if (application_layer != nullptr){
|
||||
payload_size = application_layer->size();
|
||||
}
|
||||
packet_info pktinfo{
|
||||
packet: string(payload, payload+plen),
|
||||
payload: string(payload+plen - payload_size, payload+plen),
|
||||
sid: stream_id::make_identifier(packet),
|
||||
is_input: is_input,
|
||||
is_tcp: true,
|
||||
sctx: sctx,
|
||||
};
|
||||
sctx->tcp_match_util.matching_has_been_called = false;
|
||||
sctx->tcp_match_util.pkt_info = &pktinfo;
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.build_verdict] TCP Packet received " << packet.src_addr() << ":" << tcp->sport() << " -> " << packet.dst_addr() << ":" << tcp->dport() << " thr: " << this_thread::get_id() << ", sending to libtins StreamFollower" << endl;
|
||||
#endif
|
||||
sctx->follower.process_packet(packet);
|
||||
#ifdef DEBUG
|
||||
if (sctx->tcp_match_util.matching_has_been_called){
|
||||
cerr << "[DEBUG] [NetfilterQueue.build_verdict] StreamFollower has called matching functions" << endl;
|
||||
}else{
|
||||
cerr << "[DEBUG] [NetfilterQueue.build_verdict] StreamFollower has NOT called matching functions" << endl;
|
||||
}
|
||||
#endif
|
||||
if (sctx->tcp_match_util.matching_has_been_called && !sctx->tcp_match_util.result){
|
||||
Tins::PDU* data_layer = tcp->release_inner_pdu();
|
||||
if (data_layer != nullptr){
|
||||
delete data_layer;
|
||||
}
|
||||
tcp->set_flag(Tins::TCP::FIN,1);
|
||||
tcp->set_flag(Tins::TCP::ACK,1);
|
||||
tcp->set_flag(Tins::TCP::SYN,0);
|
||||
nfq_nlmsg_verdict_put_pkt(nlh_verdict, packet.serialize().data(), packet.size());
|
||||
}
|
||||
nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_ACCEPT );
|
||||
}else{
|
||||
Tins::UDP* udp = packet.template find_pdu<Tins::UDP>();
|
||||
if (!udp){
|
||||
throw invalid_argument("Only TCP and UDP are supported");
|
||||
}
|
||||
Tins::PDU* application_layer = udp->inner_pdu();
|
||||
u_int16_t payload_size = 0;
|
||||
if (application_layer != nullptr){
|
||||
payload_size = application_layer->size();
|
||||
}
|
||||
if((udp->inner_pdu() == nullptr)){
|
||||
nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_ACCEPT );
|
||||
}
|
||||
packet_info pktinfo{
|
||||
packet: string(payload, payload+plen),
|
||||
payload: string(payload+plen - payload_size, payload+plen),
|
||||
sid: stream_id::make_identifier(packet),
|
||||
is_input: is_input,
|
||||
is_tcp: false,
|
||||
sctx: sctx,
|
||||
};
|
||||
if (filter_action(pktinfo)){
|
||||
nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_ACCEPT );
|
||||
}else{
|
||||
nfq_nlmsg_verdict_put(nlh_verdict, ntohl(ph->packet_id), NF_DROP );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int queue_cb(const nlmsghdr *nlh, const mnl_socket* nl, void *data_ptr) {
|
||||
|
||||
stream_ctx* sctx = (stream_ctx*)data_ptr;
|
||||
|
||||
//Extract attributes from the nlmsghdr
|
||||
nlattr *attr[NFQA_MAX+1] = {};
|
||||
|
||||
if (nfq_nlmsg_parse(nlh, attr) < 0) {
|
||||
perror("problems parsing");
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
if (attr[NFQA_PACKET_HDR] == nullptr) {
|
||||
fputs("metaheader not set\n", stderr);
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
if (attr[NFQA_MARK] == nullptr) {
|
||||
fputs("mark not set\n", stderr);
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
//Get Payload
|
||||
uint16_t plen = mnl_attr_get_payload_len(attr[NFQA_PAYLOAD]);
|
||||
uint8_t *payload = (uint8_t *)mnl_attr_get_payload(attr[NFQA_PAYLOAD]);
|
||||
|
||||
//Return result to the kernel
|
||||
struct nfqnl_msg_packet_hdr *ph = (nfqnl_msg_packet_hdr*) mnl_attr_get_payload(attr[NFQA_PACKET_HDR]);
|
||||
struct nfgenmsg *nfg = (nfgenmsg *)mnl_nlmsg_get_payload(nlh);
|
||||
char buf[MNL_SOCKET_BUFFER_SIZE];
|
||||
struct nlmsghdr *nlh_verdict;
|
||||
|
||||
nlh_verdict = nfq_nlmsg_put(buf, NFQNL_MSG_VERDICT, ntohs(nfg->res_id));
|
||||
|
||||
bool is_input = ntohl(mnl_attr_get_u32(attr[NFQA_MARK])) & 0x1; // == 0x1337 that is odd
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.queue_cb] Packet received" << endl;
|
||||
cerr << "[DEBUG] [NetfilterQueue.queue_cb] Packet ID: " << ntohl(ph->packet_id) << endl;
|
||||
cerr << "[DEBUG] [NetfilterQueue.queue_cb] Payload size: " << plen << endl;
|
||||
cerr << "[DEBUG] [NetfilterQueue.queue_cb] Is input: " << is_input << endl;
|
||||
#endif
|
||||
|
||||
// Check IP protocol version
|
||||
if ( (payload[0] & 0xf0) == 0x40 ){
|
||||
build_verdict(Tins::IP(payload, plen), payload, plen, nlh_verdict, ph, sctx, is_input);
|
||||
}else{
|
||||
build_verdict(Tins::IPv6(payload, plen), payload, plen, nlh_verdict, ph, sctx, is_input);
|
||||
}
|
||||
|
||||
if (mnl_socket_sendto(nl, nlh_verdict, nlh_verdict->nlmsg_len) < 0) {
|
||||
throw runtime_error( "mnl_socket_send" );
|
||||
}
|
||||
|
||||
return MNL_CB_OK;
|
||||
}
|
||||
|
||||
RegexQueue(int queue) : NfQueueExecutor(queue, &queue_cb) {}
|
||||
|
||||
~RegexQueue() {
|
||||
sctx.clean();
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
#endif // REGEX_FILTER_CLASS_CPP
|
||||
143
backend/binsrc/regex/stream_ctx.cpp
Normal file
143
backend/binsrc/regex/stream_ctx.cpp
Normal file
@@ -0,0 +1,143 @@
|
||||
|
||||
#ifndef STREAM_CTX_CPP
|
||||
#define STREAM_CTX_CPP
|
||||
|
||||
#include <iostream>
|
||||
#include <hs.h>
|
||||
#include <tins/tcp_ip/stream_follower.h>
|
||||
#include <tins/tcp_ip/stream_identifier.h>
|
||||
|
||||
using Tins::TCPIP::Stream;
|
||||
using Tins::TCPIP::StreamFollower;
|
||||
using namespace std;
|
||||
|
||||
typedef Tins::TCPIP::StreamIdentifier stream_id;
|
||||
typedef map<stream_id, hs_stream_t*> matching_map;
|
||||
|
||||
/* Considering to use unorder_map using this hash of stream_id
|
||||
|
||||
namespace std {
|
||||
template<>
|
||||
struct hash<stream_id> {
|
||||
size_t operator()(const stream_id& sid) const
|
||||
{
|
||||
return std::hash<std::uint32_t>()(sid.max_address[0] + sid.max_address[1] + sid.max_address[2] + sid.max_address[3] + sid.max_address_port + sid.min_address[0] + sid.min_address[1] + sid.min_address[2] + sid.min_address[3] + sid.min_address_port);
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
*/
|
||||
|
||||
#ifdef DEBUG
|
||||
ostream& operator<<(ostream& os, const Tins::TCPIP::StreamIdentifier::address_type &sid){
|
||||
bool first_print = false;
|
||||
for (auto ele: sid){
|
||||
if (first_print || ele){
|
||||
first_print = true;
|
||||
os << (int)ele << ".";
|
||||
}
|
||||
}
|
||||
return os;
|
||||
}
|
||||
|
||||
ostream& operator<<(ostream& os, const stream_id &sid){
|
||||
os << sid.max_address << ":" << sid.max_address_port << " -> " << sid.min_address << ":" << sid.min_address_port;
|
||||
return os;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
struct packet_info;
|
||||
|
||||
struct tcp_stream_tmp {
|
||||
bool matching_has_been_called = false;
|
||||
bool result;
|
||||
packet_info *pkt_info;
|
||||
};
|
||||
|
||||
struct stream_ctx {
|
||||
matching_map in_hs_streams;
|
||||
matching_map out_hs_streams;
|
||||
hs_scratch_t* in_scratch = nullptr;
|
||||
hs_scratch_t* out_scratch = nullptr;
|
||||
u_int16_t latest_config_ver = 0;
|
||||
StreamFollower follower;
|
||||
tcp_stream_tmp tcp_match_util;
|
||||
|
||||
void clean_scratches(){
|
||||
if (out_scratch != nullptr){
|
||||
hs_free_scratch(out_scratch);
|
||||
out_scratch = nullptr;
|
||||
}
|
||||
if (in_scratch != nullptr){
|
||||
hs_free_scratch(in_scratch);
|
||||
in_scratch = nullptr;
|
||||
}
|
||||
}
|
||||
|
||||
void clean_stream_by_id(stream_id sid){
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.clean_stream_by_id] Cleaning stream context of " << sid << endl;
|
||||
#endif
|
||||
auto stream_search = in_hs_streams.find(sid);
|
||||
hs_stream_t* stream_match;
|
||||
if (stream_search != in_hs_streams.end()){
|
||||
stream_match = stream_search->second;
|
||||
if (hs_close_stream(stream_match, in_scratch, nullptr, nullptr) != HS_SUCCESS) {
|
||||
cerr << "[error] [NetfilterQueue.clean_stream_by_id] Error closing the stream matcher (hs)" << endl;
|
||||
throw invalid_argument("Cannot close stream match on hyperscan");
|
||||
}
|
||||
in_hs_streams.erase(stream_search);
|
||||
}
|
||||
|
||||
stream_search = out_hs_streams.find(sid);
|
||||
if (stream_search != out_hs_streams.end()){
|
||||
stream_match = stream_search->second;
|
||||
if (hs_close_stream(stream_match, out_scratch, nullptr, nullptr) != HS_SUCCESS) {
|
||||
cerr << "[error] [NetfilterQueue.clean_stream_by_id] Error closing the stream matcher (hs)" << endl;
|
||||
throw invalid_argument("Cannot close stream match on hyperscan");
|
||||
}
|
||||
out_hs_streams.erase(stream_search);
|
||||
}
|
||||
}
|
||||
|
||||
void clean(){
|
||||
|
||||
#ifdef DEBUG
|
||||
cerr << "[DEBUG] [NetfilterQueue.clean] Cleaning stream context" << endl;
|
||||
#endif
|
||||
|
||||
if (in_scratch){
|
||||
for(auto ele: in_hs_streams){
|
||||
if (hs_close_stream(ele.second, in_scratch, nullptr, nullptr) != HS_SUCCESS) {
|
||||
cerr << "[error] [NetfilterQueue.clean_stream_by_id] Error closing the stream matcher (hs)" << endl;
|
||||
throw invalid_argument("Cannot close stream match on hyperscan");
|
||||
}
|
||||
}
|
||||
in_hs_streams.clear();
|
||||
}
|
||||
|
||||
if (out_scratch){
|
||||
for(auto ele: out_hs_streams){
|
||||
if (hs_close_stream(ele.second, out_scratch, nullptr, nullptr) != HS_SUCCESS) {
|
||||
cerr << "[error] [NetfilterQueue.clean_stream_by_id] Error closing the stream matcher (hs)" << endl;
|
||||
throw invalid_argument("Cannot close stream match on hyperscan");
|
||||
}
|
||||
}
|
||||
out_hs_streams.clear();
|
||||
}
|
||||
clean_scratches();
|
||||
}
|
||||
};
|
||||
|
||||
struct packet_info {
|
||||
string packet;
|
||||
string payload;
|
||||
stream_id sid;
|
||||
bool is_input;
|
||||
bool is_tcp;
|
||||
stream_ctx* sctx;
|
||||
};
|
||||
|
||||
|
||||
#endif // STREAM_CTX_CPP
|
||||
@@ -4,5 +4,3 @@ chown nobody -R /execute/
|
||||
|
||||
exec capsh --caps="cap_net_admin+eip cap_setpcap,cap_setuid,cap_setgid+ep" \
|
||||
--keep=1 --user=nobody --addamb=cap_net_admin -- -c "python3 /execute/app.py DOCKER"
|
||||
|
||||
|
||||
|
||||
0
backend/modules/nfproxy/__init__.py
Normal file
0
backend/modules/nfproxy/__init__.py
Normal file
171
backend/modules/nfproxy/firegex.py
Normal file
171
backend/modules/nfproxy/firegex.py
Normal file
@@ -0,0 +1,171 @@
|
||||
from modules.nfregex.nftables import FiregexTables
|
||||
from utils import run_func
|
||||
from modules.nfregex.models import Service, Regex
|
||||
import re
|
||||
import os
|
||||
import asyncio
|
||||
import traceback
|
||||
from utils import DEBUG
|
||||
from fastapi import HTTPException
|
||||
|
||||
nft = FiregexTables()
|
||||
|
||||
class RegexFilter:
|
||||
def __init__(
|
||||
self, regex,
|
||||
is_case_sensitive=True,
|
||||
input_mode=False,
|
||||
output_mode=False,
|
||||
blocked_packets=0,
|
||||
id=None,
|
||||
update_func = None
|
||||
):
|
||||
self.regex = regex
|
||||
self.is_case_sensitive = is_case_sensitive
|
||||
if input_mode == output_mode:
|
||||
input_mode = output_mode = True # (False, False) == (True, True)
|
||||
self.input_mode = input_mode
|
||||
self.output_mode = output_mode
|
||||
self.blocked = blocked_packets
|
||||
self.id = id
|
||||
self.update_func = update_func
|
||||
self.compiled_regex = self.compile()
|
||||
|
||||
@classmethod
|
||||
def from_regex(cls, regex:Regex, update_func = None):
|
||||
return cls(
|
||||
id=regex.id, regex=regex.regex, is_case_sensitive=regex.is_case_sensitive,
|
||||
blocked_packets=regex.blocked_packets,
|
||||
input_mode = regex.mode in ["C","B"], output_mode=regex.mode in ["S","B"],
|
||||
update_func = update_func
|
||||
)
|
||||
def compile(self):
|
||||
if isinstance(self.regex, str):
|
||||
self.regex = self.regex.encode()
|
||||
if not isinstance(self.regex, bytes):
|
||||
raise Exception("Invalid Regex Paramether")
|
||||
re.compile(self.regex) # raise re.error if it's invalid!
|
||||
case_sensitive = "1" if self.is_case_sensitive else "0"
|
||||
if self.input_mode:
|
||||
yield case_sensitive + "C" + self.regex.hex()
|
||||
if self.output_mode:
|
||||
yield case_sensitive + "S" + self.regex.hex()
|
||||
|
||||
async def update(self):
|
||||
if self.update_func:
|
||||
await run_func(self.update_func, self)
|
||||
|
||||
class FiregexInterceptor:
|
||||
|
||||
def __init__(self):
|
||||
self.srv:Service
|
||||
self.filter_map_lock:asyncio.Lock
|
||||
self.filter_map: dict[str, RegexFilter]
|
||||
self.regex_filters: set[RegexFilter]
|
||||
self.update_config_lock:asyncio.Lock
|
||||
self.process:asyncio.subprocess.Process
|
||||
self.update_task: asyncio.Task
|
||||
self.ack_arrived = False
|
||||
self.ack_status = None
|
||||
self.ack_fail_what = ""
|
||||
self.ack_lock = asyncio.Lock()
|
||||
|
||||
@classmethod
|
||||
async def start(cls, srv: Service):
|
||||
self = cls()
|
||||
self.srv = srv
|
||||
self.filter_map_lock = asyncio.Lock()
|
||||
self.update_config_lock = asyncio.Lock()
|
||||
queue_range = await self._start_binary()
|
||||
self.update_task = asyncio.create_task(self.update_blocked())
|
||||
nft.add(self.srv, queue_range)
|
||||
if not self.ack_lock.locked():
|
||||
await self.ack_lock.acquire()
|
||||
return self
|
||||
|
||||
async def _start_binary(self):
|
||||
proxy_binary_path = os.path.join(os.path.dirname(os.path.abspath(__file__)),"../cppqueue")
|
||||
self.process = await asyncio.create_subprocess_exec(
|
||||
proxy_binary_path,
|
||||
stdout=asyncio.subprocess.PIPE, stdin=asyncio.subprocess.PIPE,
|
||||
env={"MATCH_MODE": "stream" if self.srv.proto == "tcp" else "block", "NTHREADS": os.getenv("NTHREADS","1")},
|
||||
)
|
||||
line_fut = self.process.stdout.readuntil()
|
||||
try:
|
||||
line_fut = await asyncio.wait_for(line_fut, timeout=3)
|
||||
except asyncio.TimeoutError:
|
||||
self.process.kill()
|
||||
raise Exception("Invalid binary output")
|
||||
line = line_fut.decode()
|
||||
if line.startswith("QUEUES "):
|
||||
params = line.split()
|
||||
return (int(params[1]), int(params[2]))
|
||||
else:
|
||||
self.process.kill()
|
||||
raise Exception("Invalid binary output")
|
||||
|
||||
async def update_blocked(self):
|
||||
try:
|
||||
while True:
|
||||
line = (await self.process.stdout.readuntil()).decode()
|
||||
if DEBUG:
|
||||
print(line)
|
||||
if line.startswith("BLOCKED "):
|
||||
regex_id = line.split()[1]
|
||||
async with self.filter_map_lock:
|
||||
if regex_id in self.filter_map:
|
||||
self.filter_map[regex_id].blocked+=1
|
||||
await self.filter_map[regex_id].update()
|
||||
if line.startswith("ACK "):
|
||||
self.ack_arrived = True
|
||||
self.ack_status = line.split()[1].upper() == "OK"
|
||||
if not self.ack_status:
|
||||
self.ack_fail_what = " ".join(line.split()[2:])
|
||||
self.ack_lock.release()
|
||||
except asyncio.CancelledError:
|
||||
pass
|
||||
except asyncio.IncompleteReadError:
|
||||
pass
|
||||
except Exception:
|
||||
traceback.print_exc()
|
||||
|
||||
async def stop(self):
|
||||
self.update_task.cancel()
|
||||
if self.process and self.process.returncode is None:
|
||||
self.process.kill()
|
||||
|
||||
async def _update_config(self, filters_codes):
|
||||
async with self.update_config_lock:
|
||||
self.process.stdin.write((" ".join(filters_codes)+"\n").encode())
|
||||
await self.process.stdin.drain()
|
||||
try:
|
||||
async with asyncio.timeout(3):
|
||||
await self.ack_lock.acquire()
|
||||
except TimeoutError:
|
||||
pass
|
||||
if not self.ack_arrived or not self.ack_status:
|
||||
raise HTTPException(status_code=500, detail=f"NFQ error: {self.ack_fail_what}")
|
||||
|
||||
|
||||
async def reload(self, filters:list[RegexFilter]):
|
||||
async with self.filter_map_lock:
|
||||
self.filter_map = self.compile_filters(filters)
|
||||
filters_codes = self.get_filter_codes()
|
||||
await self._update_config(filters_codes)
|
||||
|
||||
def get_filter_codes(self):
|
||||
filters_codes = list(self.filter_map.keys())
|
||||
filters_codes.sort(key=lambda a: self.filter_map[a].blocked, reverse=True)
|
||||
return filters_codes
|
||||
|
||||
def compile_filters(self, filters:list[RegexFilter]):
|
||||
res = {}
|
||||
for filter_obj in filters:
|
||||
try:
|
||||
raw_filters = filter_obj.compile()
|
||||
for filter in raw_filters:
|
||||
res[filter] = filter_obj
|
||||
except Exception:
|
||||
pass
|
||||
return res
|
||||
|
||||
119
backend/modules/nfproxy/firewall.py
Normal file
119
backend/modules/nfproxy/firewall.py
Normal file
@@ -0,0 +1,119 @@
|
||||
import asyncio
|
||||
from modules.nfregex.firegex import FiregexInterceptor, RegexFilter
|
||||
from modules.nfregex.nftables import FiregexTables, FiregexFilter
|
||||
from modules.nfregex.models import Regex, Service
|
||||
from utils.sqlite import SQLite
|
||||
|
||||
class STATUS:
|
||||
STOP = "stop"
|
||||
ACTIVE = "active"
|
||||
|
||||
nft = FiregexTables()
|
||||
|
||||
|
||||
class ServiceManager:
|
||||
def __init__(self, srv: Service, db):
|
||||
self.srv = srv
|
||||
self.db = db
|
||||
self.status = STATUS.STOP
|
||||
self.filters: dict[int, FiregexFilter] = {}
|
||||
self.lock = asyncio.Lock()
|
||||
self.interceptor = None
|
||||
|
||||
async def _update_filters_from_db(self):
|
||||
regexes = [
|
||||
Regex.from_dict(ele) for ele in
|
||||
self.db.query("SELECT * FROM regexes WHERE service_id = ? AND active=1;", self.srv.id)
|
||||
]
|
||||
#Filter check
|
||||
old_filters = set(self.filters.keys())
|
||||
new_filters = set([f.id for f in regexes])
|
||||
#remove old filters
|
||||
for f in old_filters:
|
||||
if f not in new_filters:
|
||||
del self.filters[f]
|
||||
#add new filters
|
||||
for f in new_filters:
|
||||
if f not in old_filters:
|
||||
filter = [ele for ele in regexes if ele.id == f][0]
|
||||
self.filters[f] = RegexFilter.from_regex(filter, self._stats_updater)
|
||||
if self.interceptor:
|
||||
await self.interceptor.reload(self.filters.values())
|
||||
|
||||
def __update_status_db(self, status):
|
||||
self.db.query("UPDATE services SET status = ? WHERE service_id = ?;", status, self.srv.id)
|
||||
|
||||
async def next(self,to):
|
||||
async with self.lock:
|
||||
if (self.status, to) == (STATUS.ACTIVE, STATUS.STOP):
|
||||
await self.stop()
|
||||
self._set_status(to)
|
||||
# PAUSE -> ACTIVE
|
||||
elif (self.status, to) == (STATUS.STOP, STATUS.ACTIVE):
|
||||
await self.restart()
|
||||
|
||||
def _stats_updater(self,filter:RegexFilter):
|
||||
self.db.query("UPDATE regexes SET blocked_packets = ? WHERE regex_id = ?;", filter.blocked, filter.id)
|
||||
|
||||
def _set_status(self,status):
|
||||
self.status = status
|
||||
self.__update_status_db(status)
|
||||
|
||||
async def start(self):
|
||||
if not self.interceptor:
|
||||
nft.delete(self.srv)
|
||||
self.interceptor = await FiregexInterceptor.start(self.srv)
|
||||
await self._update_filters_from_db()
|
||||
self._set_status(STATUS.ACTIVE)
|
||||
|
||||
async def stop(self):
|
||||
nft.delete(self.srv)
|
||||
if self.interceptor:
|
||||
await self.interceptor.stop()
|
||||
self.interceptor = None
|
||||
|
||||
async def restart(self):
|
||||
await self.stop()
|
||||
await self.start()
|
||||
|
||||
async def update_filters(self):
|
||||
async with self.lock:
|
||||
await self._update_filters_from_db()
|
||||
|
||||
class FirewallManager:
|
||||
def __init__(self, db:SQLite):
|
||||
self.db = db
|
||||
self.service_table: dict[str, ServiceManager] = {}
|
||||
self.lock = asyncio.Lock()
|
||||
|
||||
async def close(self):
|
||||
for key in list(self.service_table.keys()):
|
||||
await self.remove(key)
|
||||
|
||||
async def remove(self,srv_id):
|
||||
async with self.lock:
|
||||
if srv_id in self.service_table:
|
||||
await self.service_table[srv_id].next(STATUS.STOP)
|
||||
del self.service_table[srv_id]
|
||||
|
||||
async def init(self):
|
||||
nft.init()
|
||||
await self.reload()
|
||||
|
||||
async def reload(self):
|
||||
async with self.lock:
|
||||
for srv in self.db.query('SELECT * FROM services;'):
|
||||
srv = Service.from_dict(srv)
|
||||
if srv.id in self.service_table:
|
||||
continue
|
||||
self.service_table[srv.id] = ServiceManager(srv, self.db)
|
||||
await self.service_table[srv.id].next(srv.status)
|
||||
|
||||
def get(self,srv_id) -> ServiceManager:
|
||||
if srv_id in self.service_table:
|
||||
return self.service_table[srv_id]
|
||||
else:
|
||||
raise ServiceNotFoundException()
|
||||
|
||||
class ServiceNotFoundException(Exception):
|
||||
pass
|
||||
30
backend/modules/nfproxy/models.py
Normal file
30
backend/modules/nfproxy/models.py
Normal file
@@ -0,0 +1,30 @@
|
||||
import base64
|
||||
|
||||
class Service:
|
||||
def __init__(self, service_id: str, status: str, port: int, name: str, proto: str, ip_int: str, **other):
|
||||
self.id = service_id
|
||||
self.status = status
|
||||
self.port = port
|
||||
self.name = name
|
||||
self.proto = proto
|
||||
self.ip_int = ip_int
|
||||
|
||||
@classmethod
|
||||
def from_dict(cls, var: dict):
|
||||
return cls(**var)
|
||||
|
||||
|
||||
class Regex:
|
||||
def __init__(self, regex_id: int, regex: bytes, mode: str, service_id: str, blocked_packets: int, is_case_sensitive: bool, active: bool, **other):
|
||||
self.regex = regex
|
||||
self.mode = mode
|
||||
self.service_id = service_id
|
||||
self.blocked_packets = blocked_packets
|
||||
self.id = regex_id
|
||||
self.is_case_sensitive = is_case_sensitive
|
||||
self.active = active
|
||||
|
||||
@classmethod
|
||||
def from_dict(cls, var: dict):
|
||||
var['regex'] = base64.b64decode(var['regex'])
|
||||
return cls(**var)
|
||||
105
backend/modules/nfproxy/nftables.py
Normal file
105
backend/modules/nfproxy/nftables.py
Normal file
@@ -0,0 +1,105 @@
|
||||
from modules.nfregex.models import Service
|
||||
from utils import ip_parse, ip_family, NFTableManager, nftables_int_to_json
|
||||
|
||||
class FiregexFilter:
|
||||
def __init__(self, proto:str, port:int, ip_int:str, target:str, id:int):
|
||||
self.id = id
|
||||
self.target = target
|
||||
self.proto = proto
|
||||
self.port = int(port)
|
||||
self.ip_int = str(ip_int)
|
||||
|
||||
def __eq__(self, o: object) -> bool:
|
||||
if isinstance(o, FiregexFilter) or isinstance(o, Service):
|
||||
return self.port == o.port and self.proto == o.proto and ip_parse(self.ip_int) == ip_parse(o.ip_int)
|
||||
return False
|
||||
|
||||
class FiregexTables(NFTableManager):
|
||||
input_chain = "nfproxy_input"
|
||||
output_chain = "nfproxy_output"
|
||||
|
||||
def __init__(self):
|
||||
super().__init__([
|
||||
{"add":{"chain":{
|
||||
"family":"inet",
|
||||
"table":self.table_name,
|
||||
"name":self.input_chain,
|
||||
"type":"filter",
|
||||
"hook":"prerouting",
|
||||
"prio":-150,
|
||||
"policy":"accept"
|
||||
}}},
|
||||
{"add":{"chain":{
|
||||
"family":"inet",
|
||||
"table":self.table_name,
|
||||
"name":self.output_chain,
|
||||
"type":"filter",
|
||||
"hook":"postrouting",
|
||||
"prio":-150,
|
||||
"policy":"accept"
|
||||
}}}
|
||||
],[
|
||||
{"flush":{"chain":{"table":self.table_name,"family":"inet", "name":self.input_chain}}},
|
||||
{"delete":{"chain":{"table":self.table_name,"family":"inet", "name":self.input_chain}}},
|
||||
{"flush":{"chain":{"table":self.table_name,"family":"inet", "name":self.output_chain}}},
|
||||
{"delete":{"chain":{"table":self.table_name,"family":"inet", "name":self.output_chain}}},
|
||||
])
|
||||
|
||||
def add(self, srv:Service, queue_range):
|
||||
|
||||
for ele in self.get():
|
||||
if ele.__eq__(srv): return
|
||||
|
||||
init, end = queue_range
|
||||
if init > end: init, end = end, init
|
||||
self.cmd(
|
||||
{ "insert":{ "rule": {
|
||||
"family": "inet",
|
||||
"table": self.table_name,
|
||||
"chain": self.output_chain,
|
||||
"expr": [
|
||||
{'match': {'left': {'payload': {'protocol': ip_family(srv.ip_int), 'field': 'saddr'}}, 'op': '==', 'right': nftables_int_to_json(srv.ip_int)}},
|
||||
{'match': {"left": { "payload": {"protocol": str(srv.proto), "field": "sport"}}, "op": "==", "right": int(srv.port)}},
|
||||
{"queue": {"num": str(init) if init == end else {"range":[init, end] }, "flags": ["bypass"]}}
|
||||
]
|
||||
}}},
|
||||
{"insert":{"rule":{
|
||||
"family": "inet",
|
||||
"table": self.table_name,
|
||||
"chain": self.input_chain,
|
||||
"expr": [
|
||||
{'match': {'left': {'payload': {'protocol': ip_family(srv.ip_int), 'field': 'daddr'}}, 'op': '==', 'right': nftables_int_to_json(srv.ip_int)}},
|
||||
{'match': {"left": { "payload": {"protocol": str(srv.proto), "field": "dport"}}, "op": "==", "right": int(srv.port)}},
|
||||
{"queue": {"num": str(init) if init == end else {"range":[init, end] }, "flags": ["bypass"]}}
|
||||
]
|
||||
}}}
|
||||
)
|
||||
|
||||
|
||||
def get(self) -> list[FiregexFilter]:
|
||||
res = []
|
||||
for filter in self.list_rules(tables=[self.table_name], chains=[self.input_chain,self.output_chain]):
|
||||
ip_int = None
|
||||
if isinstance(filter["expr"][0]["match"]["right"],str):
|
||||
ip_int = str(ip_parse(filter["expr"][0]["match"]["right"]))
|
||||
else:
|
||||
ip_int = f'{filter["expr"][0]["match"]["right"]["prefix"]["addr"]}/{filter["expr"][0]["match"]["right"]["prefix"]["len"]}'
|
||||
res.append(FiregexFilter(
|
||||
target=filter["chain"],
|
||||
id=int(filter["handle"]),
|
||||
proto=filter["expr"][1]["match"]["left"]["payload"]["protocol"],
|
||||
port=filter["expr"][1]["match"]["right"],
|
||||
ip_int=ip_int
|
||||
))
|
||||
return res
|
||||
|
||||
def delete(self, srv:Service):
|
||||
for filter in self.get():
|
||||
if filter.__eq__(srv):
|
||||
self.cmd({ "delete":{ "rule": {
|
||||
"family": "inet",
|
||||
"table": self.table_name,
|
||||
"chain": filter.target,
|
||||
"handle": filter.id
|
||||
}}})
|
||||
|
||||
@@ -19,7 +19,7 @@ ON_DOCKER = "DOCKER" in sys.argv
|
||||
DEBUG = "DEBUG" in sys.argv
|
||||
FIREGEX_PORT = int(os.getenv("PORT","4444"))
|
||||
JWT_ALGORITHM: str = "HS256"
|
||||
API_VERSION = "3.0.0"
|
||||
API_VERSION = "{{VERSION_PLACEHOLDER}}" if "{" not in "{{VERSION_PLACEHOLDER}}" else "0.0.0"
|
||||
|
||||
PortType = Annotated[int, Path(gt=0, lt=65536)]
|
||||
|
||||
|
||||
Reference in New Issue
Block a user