negotiate.h

Go to the documentation of this file.

 
#pragma once
 
#include <ascii-chat/asciichat_errno.h>
#include <ascii-chat/discovery/session.h>
#include "nat.h"
#include <ascii-chat/platform/socket.h>
#include <stdbool.h>
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef enum {
  NEGOTIATE_STATE_INIT,          
  NEGOTIATE_STATE_DETECTING_NAT, 
  NEGOTIATE_STATE_WAITING_PEER,  
  NEGOTIATE_STATE_COMPARING,     
  NEGOTIATE_STATE_WE_HOST,       
  NEGOTIATE_STATE_THEY_HOST,     
  NEGOTIATE_STATE_FAILED,        
  NEGOTIATE_STATE_COMPLETE       
} negotiate_state_t;
 
typedef struct {
  // Session info
  uint8_t session_id[16];
  uint8_t participant_id[16];
  bool is_initiator; 
 
  // NAT qualities
  nat_quality_t our_quality;  
  nat_quality_t peer_quality; 
  bool peer_quality_received; 
 
  // State
  negotiate_state_t state;
  asciichat_error_t error;
 
  // Result
  bool we_are_host;        
  char host_address[64];   
  uint16_t host_port;      
  uint8_t connection_type; 
} negotiate_ctx_t;
 
void negotiate_init(negotiate_ctx_t *ctx, const uint8_t session_id[16], const uint8_t participant_id[16],
                    bool is_initiator);
 
asciichat_error_t negotiate_start_detection(negotiate_ctx_t *ctx, const char *stun_server, uint16_t local_port);
 
asciichat_error_t negotiate_receive_peer_quality(negotiate_ctx_t *ctx, const acip_nat_quality_t *peer_quality);
 
asciichat_error_t negotiate_determine_result(negotiate_ctx_t *ctx);
 
negotiate_state_t negotiate_get_state(const negotiate_ctx_t *ctx);
 
bool negotiate_is_complete(const negotiate_ctx_t *ctx);
 
asciichat_error_t negotiate_get_error(const negotiate_ctx_t *ctx);
 
asciichat_error_t negotiate_elect_future_host(const acip_nat_quality_t collected_quality[],
                                              const uint8_t participant_ids[][16], size_t num_participants,
                                              uint8_t out_future_host_id[16]);
 
#ifdef __cplusplus
}
#endif