include/ascii-chat/discovery/session.h

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/* Storage capacities in elements; text buffers include the terminating NUL. */
 
#include <ascii-chat/network/acip/acds_sizes.h>
#include <ascii-chat/crypto/sizes.h>
#include <ascii-chat/common.h>
#pragma once

 
#include <stdint.h>
#include <stdbool.h>
#include "../discovery/strings.h"


typedef struct {
  uint8_t participant_id[SESSION_ID_SIZE];          
  uint8_t identity_pubkey[ED25519_PUBLIC_KEY_SIZE]; 
  uint64_t joined_at;                               
} participant_t;

typedef struct {
  uint8_t participant_id[SESSION_ID_SIZE]; 
  uint8_t nat_quality_tier;                
  uint16_t upload_kbps;                    
  uint32_t rtt_to_acds_ns;                 
  uint8_t connection_type;                 
} host_lost_candidate_t;

typedef struct session_entry {
  char session_string[SESSION_STRING_BUFFER_SIZE]; 
  uint8_t session_id[SESSION_ID_SIZE];             
 
  uint8_t host_pubkey[ED25519_PUBLIC_KEY_SIZE]; 
  uint8_t capabilities;                         
  uint8_t max_participants;                     
  uint8_t current_participants;                 
 
  char password_hash[ACIP_PASSWORD_HASH_SIZE]; 
  bool has_password;                           
  bool expose_ip_publicly; 
  uint8_t session_type;    
 
  uint64_t created_at;       
  uint64_t expires_at;       
  uint64_t last_activity_at; 
 
  // Server connection information (where clients should connect)
  char server_address[ACIP_ADDRESS_SIZE]; 
  uint16_t server_port;                   
 
  // Discovery mode host negotiation fields
  uint8_t initiator_id[SESSION_ID_SIZE];        
  bool host_established;                        
  uint8_t host_participant_id[SESSION_ID_SIZE]; 
  char host_address[ACIP_ADDRESS_SIZE];         
  uint16_t host_port;                           
  uint8_t host_connection_type;                 
 
  // Host migration state (when host disconnects)
  bool in_migration;           
  uint64_t migration_start_ns; 
  host_lost_candidate_t *migration_candidates[MAX_SESSION_PARTICIPANTS]; 
 
  participant_t *participants[MAX_SESSION_PARTICIPANTS]; 
} session_entry_t;

void session_entry_destroy(session_entry_t *entry);