/*
   Copyright (c)  2014 IOnU Security Inc. All rights reserved
   Created March 2014 by Kendrick Webster
 
   K2Client/proxy.h - interface for K2Proxy adapter
 
   Description: Clients behind firewalls that block UDP traffic
   will fall back on using an HTTP/TCP proxy.  This module provides
   low-level support for sending and receiving datagrams via K2Proxy.
*/
#pragma once
#include <stdint.h>

// start (or re-initialize) the proxy module's thread(s) ... begins listening ...
// packets received from the K2Proxy at <proxy_addr> are sent to the <onPacketReceived> callback
void proxy_start(const struct sockaddr_in* proxy_addr, const char* proxy_host, const char* urn,
                 void (*onPacketReceived)(uint8_t* buf, size_t len));

// send a UDP packet via the K2Proxy at proxy_start(<proxy_addr>)
// packet will be dropped if <is_proxy_session_active> isn't TRUE
void proxy_send(const uint8_t* buf, unsigned int len);

// stop the proxy module's thread(s)
void proxy_stop(void);


// read-only by other modules, indicates that a proxy session is currently active
// (thus calling proxy_send() will work)
extern volatile int is_proxy_session_active;