An open and free bittorrent tracker https://erdgeist.org/gitweb/opentracker
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opentracker/trackerlogic.h

81 lines
2.4 KiB

#ifndef __TRACKERLOGIC_H__
#define __TRACKERLOGIC_H__
#include <sys/types.h>
#include <sys/time.h>
/* Should be called BYTE, WORD, DWORD - but some OSs already have that and there's no #iftypedef */
/* They mark memory used as data instead of integer or human readable string -
they should be cast before used as integer/text */
typedef unsigned char ot_byte;
typedef unsigned short ot_word;
typedef unsigned long ot_dword;
typedef ot_byte ot_hash[20];
typedef ot_dword ot_ip;
typedef time_t ot_time;
#define MEMMOVE memmove
#define BZERO bzero
#define FORMAT_FIXED_STRING sprintf
#define FORMAT_FORMAT_STRING sprintf
#define BINARY_FIND binary_search
// We maintain a list of 256 pointers to sorted list of ot_torrent structs
// Sort key is, of course, its hash
// This list points to 9 pools of peers each grouped in five-minute-intervals
// thus achieving a timeout of 2700s or 45 minutes
// These pools are sorted by its binary content
#define OT_POOLS_COUNT 9
#define OT_POOLS_TIMEOUT 300
#define NOW (time(NULL)/OT_POOLS_TIMEOUT)
typedef struct ot_vector {
void *data;
size_t size;
size_t space;
} *ot_vector;
typedef struct ot_peer {
ot_ip ip;
ot_dword port_flags;
} *ot_peer;
static const ot_byte PEER_FLAG_SEEDING = 0x80;
typedef struct ot_peerlist {
ot_time base;
unsigned long seed_count[ OT_POOLS_COUNT ];
struct ot_vector peers[ OT_POOLS_COUNT ];
} *ot_peerlist;
typedef struct ot_torrent {
ot_hash hash;
ot_peerlist peer_list;
} *ot_torrent;
void *map_file( char *file_name, size_t map_size );
void unmap_file( char *file_name, void *map, size_t mapped_size, unsigned long real_size );
// This behaves quite like bsearch but allows to find
// the insertion point for inserts after unsuccessful searches
// in this case exactmatch is 0 on exit
//
void *binary_search( const void *key, const void *base,
const unsigned long member_count, const unsigned long member_size,
int (*compar) (const void *, const void *),
int *exactmatch );
//
// Exported functions
//
int init_logic( char *chdir_directory );
void deinit_logic( );
ot_torrent add_peer_to_torrent( ot_hash *hash, ot_peer peer );
size_t return_peers_for_torrent( ot_torrent torrent, unsigned long amount, char *reply );
#endif