C++ UDP Json tryParse object

JCommand.hpp

/*
  from: https://github.com/matutter/AirRocks-FlightController
	JCommand -
	SHOULD be the main JSON parsing type
	WILL be exception safe
	boost causes hangs and weird assemlber errors, v8 embedding is worse...
	i NEED c++11 support... next time its going to be an Intel Edison

*/
#ifndef JSON_COMMAND_T
#define JSON_COMMAND_T

//#include "../Includes.hpp"
#include <sstream>
#include <exception>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>

class JCommand {
public:
	boost::property_tree::ptree obj;
	JCommand() {}

	std::string Action() {
		try {
			std::string s;
			s = this->obj.get<std::string>("action");
			return s;
		}catch(std::exception const& e) {}
		return "err";
	}

	std::string Name() {
		try {
			return this->obj.get<std::string>("name");
		}catch(std::exception const& e) {}
		return "err";
	}

	char Val_t() {
		try {
			return this->obj.get<char>("val_t");
		}catch(std::exception const& e) {}
		return 0;		
	}

	float Value() {
		try {
			switch( this->Val_t() ) {
				case 'f':
					return this->obj.get<float>("value");
				case 0:
					return (float)-1.0f;
			}
		}catch(std::exception const& e) {}
		return (float)-1.0f;
	}

	bool tryParse(std::string s) {
		std::stringstream ss;
		ss << s;
		try {
			boost::property_tree::read_json(ss,this->obj);
			return true;
		}
		catch( std::exception const& e ) {}
		return false;
	}

};
#endif

send_dgram.js

var PORT = 5000;
var HOST = '0.0.0.0';
var dgram = require('dgram');
var obj = {
	action: 'setABC' /* MUST HAVE a string for the command map */
  , val_t : 'f'      /* MUST HAVE a SINGLE, leave null( or (int)0) for no value */
  , value : '0.022'  /* the data described by the val_t */
}

var message = new Buffer(JSON.stringify( obj ));
var client = dgram.createSocket('udp4');

client.send(message, 0, message.length, PORT, HOST, function(err, bytes) {
    if (err) throw err;
    console.log('UDP message sent to ' + HOST +':'+ PORT);
    client.close();
});

socketListener.cpp

/* 
  compile with g++ 4.6 or newer
  NOTE: ignore swap{b} Assembler error
*/

#include <iostream>
#include <cstring>

#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdint.h>

#include "JCommand.hpp"

#define NOENT_SOCKET_ERR 0
#define BIND_SOCKET_ERR 0
#define UDP_BUF_SIZE  2048
#define PORT 5000

using namespace std;



int main(int argc, char const *argv[])
{
	int soc, ret;
	struct sockaddr_in address;

	if ((soc = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
		throw NOENT_SOCKET_ERR;
	}

	/*on stack zero out*/
	memset((char *)&address, 0, sizeof(address));
	address.sin_family      = AF_INET;
	address.sin_addr.s_addr = htonl(INADDR_ANY); // htn long
	address.sin_port        = htons(PORT);// htn short endianess is the same?

	if (bind(soc, (struct sockaddr *)&address, sizeof(address)) < 0) {
		throw( BIND_SOCKET_ERR );	
	}

	cout << inet_ntoa( address.sin_addr ) << ":" << htons(address.sin_port)<<" "<< address.sin_port << endl;


	for(;;) {
		cout << "waiting on data..." << endl;
		char data[UDP_BUF_SIZE];
		struct sockaddr_in client;
		socklen_t addrlen = sizeof(client); 
		int length = recvfrom(soc, data, UDP_BUF_SIZE, 0, (struct sockaddr *)&client, &addrlen);
		JCommand jcom;

		if( jcom.tryParse( data ) ) {
			cout << jcom.Action() << endl;
			cout << jcom.Value() << endl;
		}
	}


	return 0;
}