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mistserver/src/controller.cpp

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/// \file controller.cpp
/// Contains all code for the controller executable.
#include <iostream>
#include <vector>
#include <sys/stat.h>
#include <mist/config.h>
#include <mist/socket.h>
#include <mist/http_parser.h>
#include <mist/procs.h>
#include <mist/auth.h>
#include <mist/timing.h>
#include "controller_storage.h"
#include "controller_connectors.h"
#include "controller_streams.h"
#include "controller_capabilities.h"
#include "server.html.h"
#define UPLINK_INTERVAL 30
#define COMPILED_USERNAME ""
#define COMPILED_PASSWORD ""
namespace Controller {
Secure::Auth keychecker; ///< Checks key authorization.
class ConnectedUser{
public:
Socket::Connection C;
HTTP::Parser H;
bool Authorized;
bool clientMode;
int logins;
std::string Username;
ConnectedUser(Socket::Connection c){
C = c;
H.Clean();
logins = 0;
Authorized = false;
clientMode = false;
}
};
void Authorize(JSON::Value & Request, JSON::Value & Response, ConnectedUser & conn){
time_t Time = time(0);
tm * TimeInfo = localtime( &Time);
std::stringstream Date;
std::string retval;
Date << TimeInfo->tm_mday << "-" << TimeInfo->tm_mon << "-" << TimeInfo->tm_year + 1900;
std::string Challenge = Secure::md5(Date.str().c_str() + conn.C.getHost());
if (Request.isMember("authorize")){
std::string UserID = Request["authorize"]["username"];
if (Storage["account"].isMember(UserID)){
if (Secure::md5(Storage["account"][UserID]["password"].asString() + Challenge) == Request["authorize"]["password"].asString()){
Response["authorize"]["status"] = "OK";
conn.Username = UserID;
conn.Authorized = true;
return;
}
}
if (UserID != ""){
if (Request["authorize"]["password"].asString() != ""
&& Secure::md5(Storage["account"][UserID]["password"].asString()) != Request["authorize"]["password"].asString()){
Log("AUTH", "Failed login attempt " + UserID + " @ " + conn.C.getHost());
}
}
conn.logins++;
}
conn.Username = "";
conn.Authorized = false;
Response["authorize"]["status"] = "CHALL";
Response["authorize"]["challenge"] = Challenge;
return;
}
void CheckConfig(JSON::Value & in, JSON::Value & out){
for (JSON::ObjIter jit = in.ObjBegin(); jit != in.ObjEnd(); jit++){
if (out.isMember(jit->first)){
if (jit->second != out[jit->first]){
if (jit->first != "time"){
Log("CONF", std::string("Updated configuration value ") + jit->first);
}
}
}else{
Log("CONF", std::string("New configuration value ") + jit->first);
}
}
for (JSON::ObjIter jit = out.ObjBegin(); jit != out.ObjEnd(); jit++){
if ( !in.isMember(jit->first)){
Log("CONF", std::string("Deleted configuration value ") + jit->first);
}
}
out = in;
}
void CheckStats(JSON::Value & stats){
long long int currTime = Util::epoch();
for (JSON::ObjIter jit = stats.ObjBegin(); jit != stats.ObjEnd(); jit++){
if (currTime - lastBuffer[jit->first] > 120){
stats.removeMember(jit->first);
return;
}else{
if (jit->second.isMember("curr") && jit->second["curr"].size() > 0){
for (JSON::ObjIter u_it = jit->second["curr"].ObjBegin(); u_it != jit->second["curr"].ObjEnd(); ++u_it){
if (u_it->second.isMember("now") && u_it->second["now"].asInt() < currTime - 3){
jit->second["log"].append(u_it->second);
jit->second["curr"].removeMember(u_it->first);
if ( !jit->second["curr"].size()){
break;
}
u_it = jit->second["curr"].ObjBegin();
}
}
}
}
}
}
} //Controller namespace
int main(int argc, char ** argv){
Controller::Storage = JSON::fromFile("config.json");
JSON::Value stored_port = JSON::fromString("{\"long\":\"port\", \"short\":\"p\", \"arg\":\"integer\", \"help\":\"TCP port to listen on.\"}");
stored_port["default"] = Controller::Storage["config"]["controller"]["port"];
if ( !stored_port["default"]){
stored_port["default"] = 4242;
}
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.\"}");
stored_interface["default"] = Controller::Storage["config"]["controller"]["interface"];
if ( !stored_interface["default"]){
stored_interface["default"] = "0.0.0.0";
}
JSON::Value stored_user = JSON::fromString(
"{\"long\":\"username\", \"short\":\"u\", \"arg\":\"string\", \"help\":\"Username to drop privileges to, or root to not drop provileges.\"}");
stored_user["default"] = Controller::Storage["config"]["controller"]["username"];
if ( !stored_user["default"]){
stored_user["default"] = "root";
}
Util::Config conf = Util::Config(argv[0], PACKAGE_VERSION " / " RELEASE);
conf.addOption("listen_port", stored_port);
conf.addOption("listen_interface", stored_interface);
conf.addOption("username", stored_user);
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.\"}"));
conf.addOption("account",
JSON::fromString(
"{\"long\":\"account\", \"short\":\"a\", \"arg\":\"string\" \"default\":\"\", \"help\":\"A username:password string to create a new account with.\"}"));
conf.addOption("uplink", JSON::fromString("{\"default\":0, \"help\":\"Enable MistSteward uplink.\", \"short\":\"U\", \"long\":\"uplink\"}"));
conf.parseArgs(argc, argv);
std::string account = conf.getString("account");
if (account.size() > 0){
size_t colon = account.find(':');
if (colon != std::string::npos && colon != 0 && colon != account.size()){
std::string uname = account.substr(0, colon);
std::string pword = account.substr(colon + 1, std::string::npos);
Controller::Log("CONF", "Created account " + uname + " through commandline option");
Controller::Storage["account"][uname]["password"] = Secure::md5(pword);
}
}
time_t lastuplink = 0;
time_t processchecker = 0;
Socket::Server API_Socket = Socket::Server(conf.getInteger("listen_port"), conf.getString("listen_interface"), true);
mkdir("/tmp/mist", S_IRWXU | S_IRWXG | S_IRWXO); //attempt to create /tmp/mist/ - ignore failures
Socket::Server Stats_Socket = Socket::Server("/tmp/mist/statistics", true);
conf.activate();
Socket::Connection Incoming;
std::vector<Controller::ConnectedUser> users;
std::vector<Socket::Connection> buffers;
JSON::Value Request;
JSON::Value Response;
std::string jsonp;
Controller::ConnectedUser * uplink = 0;
Controller::Log("CONF", "Controller started");
conf.activate();
while (API_Socket.connected() && conf.is_active){
usleep(10000); //sleep for 10 ms - prevents 100% CPU time
if (Util::epoch() - processchecker > 10){
processchecker = Util::epoch();
Controller::CheckProtocols(Controller::Storage["config"]["protocols"]);
Controller::CheckAllStreams(Controller::Storage["streams"]);
Controller::CheckStats(Controller::Storage["statistics"]);
}
if (conf.getBool("uplink") && Util::epoch() - lastuplink > UPLINK_INTERVAL){
lastuplink = Util::epoch();
bool gotUplink = false;
if (users.size() > 0){
for (std::vector<Controller::ConnectedUser>::iterator it = users.end() - 1; it >= users.begin(); it--){
if ( !it->C.connected()){
it->C.close();
users.erase(it);
break;
}
if (it->clientMode){
uplink = & *it;
gotUplink = true;
}
}
}
if ( !gotUplink){
Incoming = Socket::Connection("gearbox.ddvtech.com", 4242, true);
if (Incoming.connected()){
users.push_back((Controller::ConnectedUser)Incoming);
users.back().clientMode = true;
uplink = &users.back();
gotUplink = true;
}
}
if (gotUplink){
Response.null(); //make sure no data leaks from previous requests
Response["config"] = Controller::Storage["config"];
Response["streams"] = Controller::Storage["streams"];
Response["log"] = Controller::Storage["log"];
Response["statistics"] = Controller::Storage["statistics"];
Response["now"] = (unsigned int)lastuplink;
uplink->H.Clean();
uplink->H.SetBody("command=" + HTTP::Parser::urlencode(Response.toString()));
uplink->H.BuildRequest();
uplink->C.Send(uplink->H.BuildResponse("200", "OK"));
uplink->H.Clean();
//Controller::Log("UPLK", "Sending server data to uplink.");
}else{
Controller::Log("UPLK", "Could not connect to uplink.");
}
}
Incoming = API_Socket.accept(true);
if (Incoming.connected()){
users.push_back((Controller::ConnectedUser)Incoming);
}
Incoming = Stats_Socket.accept(true);
if (Incoming.connected()){
buffers.push_back(Incoming);
}
if (buffers.size() > 0){
for (std::vector<Socket::Connection>::iterator it = buffers.begin(); it != buffers.end(); it++){
if ( !it->connected()){
it->close();
buffers.erase(it);
break;
}
if (it->spool()){
while (it->Received().size()){
it->Received().get().resize(it->Received().get().size() - 1);
Request = JSON::fromString(it->Received().get());
it->Received().get().clear();
if (Request.isMember("buffer")){
std::string thisbuffer = Request["buffer"];
Controller::lastBuffer[thisbuffer] = Util::epoch();
//if metadata is available, store it
if (Request.isMember("meta")){
Controller::Storage["streams"][thisbuffer]["meta"] = Request["meta"];
}
if (Request.isMember("totals")){
Controller::Storage["statistics"][thisbuffer]["curr"] = Request["curr"];
std::string nowstr = Request["totals"]["now"].asString();
Controller::Storage["statistics"][thisbuffer]["totals"][nowstr] = Request["totals"];
Controller::Storage["statistics"][thisbuffer]["totals"][nowstr].removeMember("now");
Controller::Storage["statistics"][thisbuffer]["totals"].shrink(600); //limit to 10 minutes of data
for (JSON::ObjIter jit = Request["log"].ObjBegin(); jit != Request["log"].ObjEnd(); jit++){
Controller::Storage["statistics"][thisbuffer]["log"].append(jit->second);
Controller::Storage["statistics"][thisbuffer]["log"].shrink(1000); //limit to 1000 users per buffer
}
}
}
if (Request.isMember("vod")){
std::string thisfile = Request["vod"]["filename"];
for (JSON::ObjIter oit = Controller::Storage["streams"].ObjBegin(); oit != Controller::Storage["streams"].ObjEnd(); ++oit){
if (oit->second["channel"]["URL"].asString() == thisfile){
Controller::lastBuffer[oit->first] = Util::epoch();
if (Request["vod"].isMember("meta")){
Controller::Storage["streams"][oit->first]["meta"] = Request["vod"]["meta"];
}
JSON::Value sockit = (long long int)it->getSocket();
std::string nowstr = Request["vod"]["now"].asString();
Controller::Storage["statistics"][oit->first]["curr"][sockit.asString()] = Request["vod"];
Controller::Storage["statistics"][oit->first]["curr"][sockit.asString()].removeMember("meta");
JSON::Value nowtotal;
for (JSON::ObjIter u_it = Controller::Storage["statistics"][oit->first]["curr"].ObjBegin();
u_it != Controller::Storage["statistics"][oit->first]["curr"].ObjEnd(); ++u_it){
nowtotal["up"] = nowtotal["up"].asInt() + u_it->second["up"].asInt();
nowtotal["down"] = nowtotal["down"].asInt() + u_it->second["down"].asInt();
nowtotal["count"] = nowtotal["count"].asInt() + 1;
}
Controller::Storage["statistics"][oit->first]["totals"][nowstr] = nowtotal;
Controller::Storage["statistics"][oit->first]["totals"].shrink(600);
}
}
}
}
}
}
}
if (users.size() > 0){
for (std::vector<Controller::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() || it->C.Received().size()){
if ( *(it->C.Received().get().rbegin()) != '\n'){
std::string tmp = it->C.Received().get();
it->C.Received().get().clear();
if (it->C.Received().size()){
it->C.Received().get().insert(0, tmp);
}else{
it->C.Received().append(tmp);
}
continue;
}
if (it->H.Read(it->C.Received().get())){
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){
Controller::Log("UPLK", "Max login attempts passed - dropping connection to uplink.");
it->C.close();
}else{
Response["config"] = Controller::Storage["config"];
Response["streams"] = Controller::Storage["streams"];
Response["log"] = Controller::Storage["log"];
Response["statistics"] = Controller::Storage["statistics"];
Response["authorize"]["username"] = COMPILED_USERNAME;
Controller::checkCapable(Response["capabilities"]);
Controller::Log("UPLK", "Responding to login challenge: " + Request["authorize"]["challenge"].asString());
Response["authorize"]["password"] = Secure::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();
Controller::Log("UPLK", "Attempting login to uplink.");
}
}
}else{
if (Request.isMember("config")){
Controller::CheckConfig(Request["config"], Controller::Storage["config"]);
}
if (Request.isMember("streams")){
Controller::CheckStreams(Request["streams"], Controller::Storage["streams"]);
}
if (Request.isMember("clearstatlogs")){
Controller::Storage["log"].null();
Controller::Storage["statistics"].null();
}
}
}else{
Request = JSON::fromString(it->H.GetVar("command"));
if ( !Request.isObject() && it->H.url != "/api"){
it->H.Clean();
it->H.SetHeader("Content-Type", "text/html");
it->H.SetHeader("X-Info", "To force an API response, request the file /api");
it->H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver + "/" RELEASE);
it->H.SetBody(std::string((char*)server_html, (size_t)server_html_len));
it->C.Send(it->H.BuildResponse("200", "OK"));
it->H.Clean();
}else{
Authorize(Request, Response, ( *it));
if (it->Authorized){
//Parse config and streams from the request.
if (Request.isMember("config")){
Controller::CheckConfig(Request["config"], Controller::Storage["config"]);
}
if (Request.isMember("streams")){
Controller::CheckStreams(Request["streams"], Controller::Storage["streams"]);
}
if (Request.isMember("capabilities")){
Controller::checkCapable(Response["capabilities"]);
}
if (Request.isMember("save")){
Controller::WriteFile("config.json", Controller::Storage.toString());
Controller::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"] = Controller::Storage["config"];
Response["config"]["version"] = PACKAGE_VERSION "/" + Util::Config::libver + "/" RELEASE;
Response["streams"] = Controller::Storage["streams"];
//add required data to the current unix time to the config, for syncing reasons
Response["config"]["time"] = Util::epoch();
if ( !Response["config"].isMember("serverid")){
Response["config"]["serverid"] = "";
}
//sent any available logs and statistics
Response["log"] = Controller::Storage["log"];
Response["statistics"] = Controller::Storage["statistics"];
//clear log and statistics if requested
if (Request.isMember("clearstatlogs")){
Controller::Storage["log"].null();
Controller::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.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();
Controller::Log("CONF", "Controller shutting down");
Util::Procs::StopAll();
Controller::WriteFile("config.json", Controller::Storage.toString());
std::cout << "Killed all processes, wrote config to disk. Exiting." << std::endl;
return 0;
}
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