542 lines
22 KiB
C++
542 lines
22 KiB
C++
/// \file controller.cpp
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/// Contains all code for the controller executable.
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <sstream>
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#include <vector>
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#include <map>
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#include <set>
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#include <cstdlib>
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#include <queue>
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#include <cmath>
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#include <ctime>
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#include <cstdio>
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#include <climits>
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#include <cstring>
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#include <unistd.h>
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#include <getopt.h>
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#include <set>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <signal.h>
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#include <sstream>
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#include <openssl/md5.h>
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#include <mist/config.h>
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#include <mist/socket.h>
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#include <mist/http_parser.h>
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#include <mist/procs.h>
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#include <mist/auth.h>
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#define UPLINK_INTERVAL 30
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#define COMPILED_USERNAME ""
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#define COMPILED_PASSWORD ""
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namespace Connector{
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std::map<std::string, int> lastBuffer; ///< Last moment of contact with all buffers.
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Auth keychecker; ///< Checks key authorization.
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/// Wrapper function for openssl MD5 implementation
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std::string md5(std::string input){
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char tmp[3];
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std::string ret;
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const unsigned char * res = MD5((const unsigned char*)input.c_str(), input.length(), 0);
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for (int i = 0; i < 16; ++i){
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snprintf(tmp, 3, "%02x", res[i]);
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ret += tmp;
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}
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return ret;
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}
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JSON::Value Storage; ///< Global storage of data.
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void WriteFile( std::string Filename, std::string contents ) {
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std::ofstream File;
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File.open( Filename.c_str( ) );
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File << contents << std::endl;
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File.close( );
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}
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class ConnectedUser{
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public:
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Socket::Connection C;
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HTTP::Parser H;
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bool Authorized;
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bool clientMode;
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int logins;
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std::string Username;
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ConnectedUser(Socket::Connection c){
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C = c;
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H.Clean();
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logins = 0;
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Authorized = false;
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clientMode = false;
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}
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};
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void Log(std::string kind, std::string message){
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//if last log message equals this one, do not log.
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if (Storage["log"].size() > 0){
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JSON::ArrIter it = Storage["log"].ArrEnd() - 1;
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if ((*it)[2] == message){return;}
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}
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JSON::Value m;
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m.append((long long int)time(0));
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m.append(kind);
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m.append(message);
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Storage["log"].append(m);
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Storage["log"].shrink(100);//limit to 100 log messages
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std::cout << "[" << kind << "] " << message << std::endl;
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}
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void Authorize( JSON::Value & Request, JSON::Value & Response, ConnectedUser & conn ) {
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time_t Time = time(0);
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tm * TimeInfo = localtime(&Time);
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std::stringstream Date;
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std::string retval;
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Date << TimeInfo->tm_mday << "-" << TimeInfo->tm_mon << "-" << TimeInfo->tm_year + 1900;
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std::string Challenge = md5( Date.str().c_str() + conn.C.getHost() );
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if( Request.isMember( "authorize" ) ) {
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std::string UserID = Request["authorize"]["username"];
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if (Storage["account"].isMember(UserID)){
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if (md5(Storage["account"][UserID]["password"].asString() + Challenge) == Request["authorize"]["password"].asString()){
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Response["authorize"]["status"] = "OK";
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conn.Username = UserID;
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conn.Authorized = true;
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return;
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}
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}
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if (UserID != ""){
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if (Request["authorize"]["password"].asString() != "" && md5(Storage["account"][UserID]["password"].asString()) != Request["authorize"]["password"].asString()){
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Log("AUTH", "Failed login attempt "+UserID+" @ "+conn.C.getHost());
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}
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}
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conn.logins++;
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}
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conn.Username = "";
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conn.Authorized = false;
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Response["authorize"]["status"] = "CHALL";
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Response["authorize"]["challenge"] = Challenge;
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return;
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}
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void CheckProtocols(JSON::Value & p){
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static std::map<std::string, std::string> current_connectors;
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std::map<std::string, std::string> new_connectors;
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std::map<std::string, std::string>::iterator iter;
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std::string tmp;
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JSON::Value counter = (long long int)0;
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//collect object type
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for (JSON::ObjIter jit = p.ObjBegin(); jit != p.ObjEnd(); jit++){
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if (!jit->second.isMember("connector") || jit->second["connector"].asString() == ""){continue;}
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if (!jit->second.isMember("port") || jit->second["port"].asInt() == 0){continue;}
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tmp = "MistConn";
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tmp += jit->second["connector"].asString();
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tmp += " -n -p ";
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tmp += jit->second["port"].asString();
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if (jit->second.isMember("interface") && jit->second["interface"].asString() != "" && jit->second["interface"].asString() != "0.0.0.0"){
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tmp += " -i ";
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tmp += jit->second["interface"].asString();
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}
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if (jit->second.isMember("username") && jit->second["username"].asString() != "" && jit->second["username"].asString() != "root"){
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tmp += " -u ";
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tmp += jit->second["username"].asString();
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}
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counter = counter.asInt() + 1;
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new_connectors[std::string("Conn")+counter.asString()] = tmp;
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}
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//collect array type
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for (JSON::ArrIter ait = p.ArrBegin(); ait != p.ArrEnd(); ait++){
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if (!(*ait).isMember("connector") || (*ait)["connector"].asString() == ""){continue;}
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if (!(*ait).isMember("port") || (*ait)["port"].asInt() == 0){continue;}
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tmp = "MistConn";
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tmp += (*ait)["connector"].asString();
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tmp += " -n -p ";
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tmp += (*ait)["port"].asString();
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if ((*ait).isMember("interface") && (*ait)["interface"].asString() != "" && (*ait)["interface"].asString() != "0.0.0.0"){
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tmp += " -i ";
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tmp += (*ait)["interface"].asString();
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}
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if ((*ait).isMember("username") && (*ait)["username"].asString() != "" && (*ait)["username"].asString() != "root"){
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tmp += " -u ";
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tmp += (*ait)["username"].asString();
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}
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counter = counter.asInt() + 1;
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new_connectors[std::string("Conn")+counter.asString()] = tmp;
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(*ait)["online"] = Util::Procs::isActive(std::string("Conn")+counter.asString());
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}
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//shut down deleted/changed connectors
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for (iter = current_connectors.begin(); iter != current_connectors.end(); iter++){
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if (new_connectors.count(iter->first) != 1 || new_connectors[iter->first] != iter->second){
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Log("CONF", "Stopping connector: " + iter->second);
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Util::Procs::Stop(iter->first);
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}
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}
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//start up new/changed connectors
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for (iter = new_connectors.begin(); iter != new_connectors.end(); iter++){
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if (current_connectors.count(iter->first) != 1 || current_connectors[iter->first] != iter->second || !Util::Procs::isActive(iter->first)){
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Log("CONF", "Starting connector: " + iter->second);
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Util::Procs::Start(iter->first, iter->second);
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}
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}
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//store new state
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current_connectors = new_connectors;
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}
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void CheckConfig(JSON::Value & in, JSON::Value & out){
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for (JSON::ObjIter jit = in.ObjBegin(); jit != in.ObjEnd(); jit++){
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if (out.isMember(jit->first)){
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if (jit->second != out[jit->first]){
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if (jit->first != "time"){
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Log("CONF", std::string("Updated configuration value ")+jit->first);
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}
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}
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}else{
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Log("CONF", std::string("New configuration value ")+jit->first);
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}
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}
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for (JSON::ObjIter jit = out.ObjBegin(); jit != out.ObjEnd(); jit++){
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if (!in.isMember(jit->first)){
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Log("CONF", std::string("Deleted configuration value ")+jit->first);
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}
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}
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out = in;
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out["version"] = PACKAGE_VERSION;
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}
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bool streamsEqual(JSON::Value & one, JSON::Value & two){
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if (one["channel"]["URL"] != two["channel"]["URL"]){return false;}
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if (one["preset"]["cmd"] != two["preset"]["cmd"]){return false;}
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return true;
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}
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void startStream(std::string name, JSON::Value & data){
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std::string URL = data["channel"]["URL"];
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std::string preset = data["preset"]["cmd"];
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std::string cmd1, cmd2, cmd3;
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if (URL.substr(0, 4) == "push"){
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std::string pusher = URL.substr(7);
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cmd2 = "MistBuffer -s "+name+" "+pusher;
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Util::Procs::Start(name, cmd2);
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Log("BUFF", "(re)starting stream buffer "+name+" for push data from "+pusher);
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}else{
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if (URL.substr(0, 1) == "/"){
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struct stat fileinfo;
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if (stat(URL.c_str(), &fileinfo) != 0 || S_ISDIR(fileinfo.st_mode)){
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Log("BUFF", "*Not* starting stream "+name+"! File not found: "+URL);
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return;
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}
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cmd1 = "cat "+URL;
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}else{
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cmd1 = "ffmpeg -re -async 2 -i "+URL+" "+preset+" -f flv -";
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cmd2 = "MistFLV2DTSC";
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}
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cmd3 = "MistBuffer -s "+name;
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if (cmd2 != ""){
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Util::Procs::Start(name, cmd1, cmd2, cmd3);
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Log("BUFF", "(re)starting stream buffer "+name+" for ffmpeg data: "+cmd1);
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}else{
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Util::Procs::Start(name, cmd1, cmd3);
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Log("BUFF", "(re)starting stream buffer "+name+" using input file "+URL);
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}
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}
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}
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void CheckStats(JSON::Value & stats){
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unsigned int currTime = time(0);
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for (JSON::ObjIter jit = stats.ObjBegin(); jit != stats.ObjEnd(); jit++){
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if (currTime - lastBuffer[jit->first] > 120){
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stats.removeMember(jit->first);
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return;
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}
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}
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}
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void CheckAllStreams(JSON::Value & data){
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unsigned int currTime = time(0);
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bool changed = false;
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for (JSON::ObjIter jit = data.ObjBegin(); jit != data.ObjEnd(); jit++){
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if (!Util::Procs::isActive(jit->first)){
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startStream(jit->first, jit->second);
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}
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if (currTime - lastBuffer[jit->first] > 5){
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if (jit->second["online"].asInt() != 0){changed = true;}
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jit->second["online"] = 0;
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}else{
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if (jit->second["online"].asInt() != 1){changed = true;}
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jit->second["online"] = 1;
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}
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}
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if (changed){
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WriteFile("/tmp/mist/streamlist", Storage.toString());
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}
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}
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void CheckStreams(JSON::Value & in, JSON::Value & out){
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bool changed = false;
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for (JSON::ObjIter jit = in.ObjBegin(); jit != in.ObjEnd(); jit++){
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if (out.isMember(jit->first)){
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if (!streamsEqual(jit->second, out[jit->first])){
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Log("STRM", std::string("Updated stream ")+jit->first);
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changed = true;
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Util::Procs::Stop(jit->first);
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startStream(jit->first, jit->second);
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}
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}else{
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Log("STRM", std::string("New stream ")+jit->first);
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changed = true;
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startStream(jit->first, jit->second);
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}
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}
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for (JSON::ObjIter jit = out.ObjBegin(); jit != out.ObjEnd(); jit++){
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if (!in.isMember(jit->first)){
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Log("STRM", std::string("Deleted stream ")+jit->first);
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changed = true;
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Util::Procs::Stop(jit->first);
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}
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}
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out = in;
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if (changed){
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WriteFile("/tmp/mist/streamlist", Storage.toString());
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}
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}
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}; //Connector namespace
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int main(int argc, char ** argv){
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Connector::Storage = JSON::fromFile("config.json");
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JSON::Value stored_port = JSON::fromString("{\"long\":\"port\", \"short\":\"p\", \"arg\":\"integer\", \"help\":\"TCP port to listen on.\"}");
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stored_port["default"] = Connector::Storage["config"]["controller"]["port"];
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if (!stored_port["default"]){stored_port["default"] = 4242;}
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JSON::Value stored_interface = JSON::fromString("{\"long\":\"interface\", \"short\":\"i\", \"arg\":\"string\", \"help\":\"Interface address to listen on, or 0.0.0.0 for all available interfaces.\"}");
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stored_interface["default"] = Connector::Storage["config"]["controller"]["interface"];
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if (!stored_interface["default"]){stored_interface["default"] = "0.0.0.0";}
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JSON::Value stored_user = JSON::fromString("{\"long\":\"username\", \"short\":\"u\", \"arg\":\"string\", \"help\":\"Username to drop privileges to, or root to not drop provileges.\"}");
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stored_user["default"] = Connector::Storage["config"]["controller"]["username"];
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if (!stored_user["default"]){stored_user["default"] = "root";}
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Util::Config conf = Util::Config(argv[0], PACKAGE_VERSION);
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conf.addOption("listen_port", stored_port);
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conf.addOption("listen_interface", stored_interface);
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conf.addOption("username", stored_user);
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conf.addOption("daemonize", JSON::fromString("{\"long\":\"daemon\", \"short\":\"d\", \"default\":1, \"long_off\":\"nodaemon\", \"short_off\":\"n\", \"help\":\"Whether or not to daemonize the process after starting.\"}"));
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conf.addOption("account", JSON::fromString("{\"long\":\"account\", \"short\":\"a\", \"arg\":\"string\" \"default\":\"\", \"help\":\"A username:password string to create a new account with.\"}"));
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conf.addOption("uplink", JSON::fromString("{\"default\":0, \"help\":\"Enable MistSteward uplink.\", \"short\":\"U\", \"long\":\"uplink\"}"));
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conf.parseArgs(argc, argv);
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std::string account = conf.getString("account");
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if (account.size() > 0){
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size_t colon = account.find(':');
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if (colon != std::string::npos && colon != 0 && colon != account.size()){
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std::string uname = account.substr(0, colon);
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std::string pword = account.substr(colon + 1, std::string::npos);
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Connector::Log("CONF", "Created account "+uname+" through commandline option");
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Connector::Storage["account"][uname]["password"] = Connector::md5(pword);
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}
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}
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time_t lastuplink = 0;
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time_t processchecker = 0;
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Socket::Server API_Socket = Socket::Server(conf.getInteger("listen_port"), conf.getString("listen_interface"), true);
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mkdir("/tmp/mist", S_IRWXU | S_IRWXG | S_IRWXO);//attempt to create /tmp/mist/ - ignore failures
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Socket::Server Stats_Socket = Socket::Server("/tmp/mist/statistics", true);
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conf.activate();
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Socket::Connection Incoming;
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std::vector< Connector::ConnectedUser > users;
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std::vector<Socket::Connection> buffers;
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JSON::Value Request;
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JSON::Value Response;
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std::string jsonp;
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Connector::ConnectedUser * uplink = 0;
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Connector::Log("CONF", "Controller started");
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conf.activate();
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while (API_Socket.connected() && conf.is_active){
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usleep(100000); //sleep for 100 ms - prevents 100% CPU time
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if (time(0) - processchecker > 10){
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processchecker = time(0);
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Connector::CheckProtocols(Connector::Storage["config"]["protocols"]);
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Connector::CheckAllStreams(Connector::Storage["streams"]);
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Connector::CheckStats(Connector::Storage["statistics"]);
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}
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if (conf.getBool("uplink") && time(0) - lastuplink > UPLINK_INTERVAL){
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lastuplink = time(0);
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bool gotUplink = false;
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if (users.size() > 0){
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for( std::vector< Connector::ConnectedUser >::iterator it = users.end() - 1; it >= users.begin(); it--) {
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if (!it->C.connected()){
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it->C.close();
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users.erase(it);
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break;
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}
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if (it->clientMode){uplink = &*it; gotUplink = true;}
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}
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}
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if (!gotUplink){
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Incoming = Socket::Connection("gearbox.ddvtech.com", 4242, true);
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if (Incoming.connected()){
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users.push_back(Incoming);
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users.back().clientMode = true;
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uplink = &users.back();
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gotUplink = true;
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}
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}
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if (gotUplink){
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Response.null(); //make sure no data leaks from previous requests
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Response["config"] = Connector::Storage["config"];
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Response["streams"] = Connector::Storage["streams"];
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Response["log"] = Connector::Storage["log"];
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Response["statistics"] = Connector::Storage["statistics"];
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Response["now"] = (unsigned int)lastuplink;
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uplink->H.Clean();
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uplink->H.SetBody("command="+HTTP::Parser::urlencode(Response.toString()));
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uplink->H.BuildRequest();
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uplink->C.Send(uplink->H.BuildResponse("200", "OK"));
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uplink->H.Clean();
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//Connector::Log("UPLK", "Sending server data to uplink.");
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}else{
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Connector::Log("UPLK", "Could not connect to uplink.");
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}
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}
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Incoming = API_Socket.accept(true);
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if (Incoming.connected()){users.push_back(Incoming);}
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Incoming = Stats_Socket.accept(true);
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if (Incoming.connected()){buffers.push_back(Incoming);}
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if (buffers.size() > 0){
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for( std::vector< Socket::Connection >::iterator it = buffers.begin(); it != buffers.end(); it++) {
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if (!it->connected()){
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it->close();
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buffers.erase(it);
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break;
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}
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if (it->spool()){
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size_t newlines = it->Received().find("\n\n");
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while (newlines != std::string::npos){
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Request = JSON::fromString(it->Received().substr(0, newlines));
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if (Request.isMember("totals") && Request["totals"].isMember("buffer")){
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std::string thisbuffer = Request["totals"]["buffer"];
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Connector::lastBuffer[thisbuffer] = time(0);
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Connector::Storage["statistics"][thisbuffer]["curr"] = Request["curr"];
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std::stringstream st;
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st << Request["totals"]["now"].asInt();
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std::string nowstr = st.str();
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Connector::Storage["statistics"][thisbuffer]["totals"][nowstr] = Request["totals"];
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Connector::Storage["statistics"][thisbuffer]["totals"].shrink(600);//limit to 10 minutes of data
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for (JSON::ObjIter jit = Request["log"].ObjBegin(); jit != Request["log"].ObjEnd(); jit++){
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Connector::Storage["statistics"][thisbuffer]["log"].append(jit->second);
|
|
Connector::Storage["statistics"][thisbuffer]["log"].shrink(1000);//limit to 1000 users per buffer
|
|
}
|
|
}
|
|
it->Received().erase(0, newlines+2);
|
|
newlines = it->Received().find("\n\n");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (users.size() > 0){
|
|
for( std::vector< Connector::ConnectedUser >::iterator it = users.begin(); it != users.end(); it++) {
|
|
if (!it->C.connected() || it->logins > 3){
|
|
it->C.close();
|
|
users.erase(it);
|
|
break;
|
|
}
|
|
if (it->C.spool()){
|
|
if (it->H.Read(it->C.Received())){
|
|
Response.null(); //make sure no data leaks from previous requests
|
|
if (it->clientMode){
|
|
// In clientMode, requests are reversed. These are connections we initiated to GearBox.
|
|
// They are assumed to be authorized, but authorization to gearbox is still done.
|
|
// This authorization uses the compiled-in username and password (account).
|
|
Request = JSON::fromString(it->H.body);
|
|
if (Request["authorize"]["status"] != "OK"){
|
|
if (Request["authorize"].isMember("challenge")){
|
|
it->logins++;
|
|
if (it->logins > 2){
|
|
Connector::Log("UPLK", "Max login attempts passed - dropping connection to uplink.");
|
|
it->C.close();
|
|
}else{
|
|
Response["config"] = Connector::Storage["config"];
|
|
Response["streams"] = Connector::Storage["streams"];
|
|
Response["log"] = Connector::Storage["log"];
|
|
Response["statistics"] = Connector::Storage["statistics"];
|
|
Response["authorize"]["username"] = COMPILED_USERNAME;
|
|
Connector::Log("UPLK", "Responding to login challenge: " + Request["authorize"]["challenge"].asString());
|
|
Response["authorize"]["password"] = Connector::md5(COMPILED_PASSWORD + Request["authorize"]["challenge"].asString());
|
|
it->H.Clean();
|
|
it->H.SetBody("command="+HTTP::Parser::urlencode(Response.toString()));
|
|
it->H.BuildRequest();
|
|
it->C.Send(it->H.BuildResponse("200", "OK"));
|
|
it->H.Clean();
|
|
Connector::Log("UPLK", "Attempting login to uplink.");
|
|
}
|
|
}
|
|
}else{
|
|
if (Request.isMember("config")){Connector::CheckConfig(Request["config"], Connector::Storage["config"]);}
|
|
if (Request.isMember("streams")){Connector::CheckStreams(Request["streams"], Connector::Storage["streams"]);}
|
|
if (Request.isMember("clearstatlogs")){
|
|
Connector::Storage["log"].null();
|
|
Connector::Storage["statistics"].null();
|
|
}
|
|
}
|
|
}else{
|
|
Request = JSON::fromString(it->H.GetVar("command"));
|
|
Authorize(Request, Response, (*it));
|
|
if (it->Authorized){
|
|
//Parse config and streams from the request.
|
|
if (Request.isMember("config")){Connector::CheckConfig(Request["config"], Connector::Storage["config"]);}
|
|
if (Request.isMember("streams")){Connector::CheckStreams(Request["streams"], Connector::Storage["streams"]);}
|
|
if (Request.isMember("save")){
|
|
Connector::WriteFile("config.json", Connector::Storage.toString());
|
|
Connector::Log("CONF", "Config written to file on request through API");
|
|
}
|
|
//sent current configuration, no matter if it was changed or not
|
|
//Response["streams"] = Storage["streams"];
|
|
Response["config"] = Connector::Storage["config"];
|
|
Response["streams"] = Connector::Storage["streams"];
|
|
//add required data to the current unix time to the config, for syncing reasons
|
|
Response["config"]["time"] = (long long int)time(0);
|
|
if (!Response["config"].isMember("serverid")){Response["config"]["serverid"] = "";}
|
|
//sent any available logs and statistics
|
|
Response["log"] = Connector::Storage["log"];
|
|
Response["statistics"] = Connector::Storage["statistics"];
|
|
//clear log and statistics if requested
|
|
if (Request.isMember("clearstatlogs")){
|
|
Connector::Storage["log"].null();
|
|
Connector::Storage["statistics"].null();
|
|
}
|
|
}
|
|
jsonp = "";
|
|
if (it->H.GetVar("callback") != ""){jsonp = it->H.GetVar("callback");}
|
|
if (it->H.GetVar("jsonp") != ""){jsonp = it->H.GetVar("jsonp");}
|
|
it->H.Clean();
|
|
it->H.protocol = "HTTP/1.0";
|
|
it->H.SetHeader("Content-Type", "text/javascript");
|
|
if (jsonp == ""){
|
|
it->H.SetBody(Response.toString()+"\n\n");
|
|
}else{
|
|
it->H.SetBody(jsonp+"("+Response.toString()+");\n\n");
|
|
}
|
|
it->C.Send(it->H.BuildResponse("200", "OK"));
|
|
it->H.Clean();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
API_Socket.close();
|
|
Connector::Log("CONF", "Controller shutting down");
|
|
Util::Procs::StopAll();
|
|
Connector::WriteFile("config.json", Connector::Storage.toString());
|
|
std::cout << "Killed all processes, wrote config to disk. Exiting." << std::endl;
|
|
return 0;
|
|
}
|