mirror of git://erdgeist.org/opentracker
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
1.8 KiB
72 lines
1.8 KiB
/* This software was written by Dirk Engling <erdgeist@erdgeist.org> |
|
It is considered beerware. Prost. Skol. Cheers or whatever. |
|
|
|
$id$ */ |
|
|
|
#ifndef __OT_LIVESYNC_H__ |
|
#define __OT_LIVESYNC_H__ |
|
|
|
#include "io.h" |
|
#include "trackerlogic.h" |
|
|
|
/* |
|
Syncing is done as udp packets in the multicast domain 224.0.42.5 port 9696 |
|
|
|
Each tracker should join the multicast group and send its live sync packets |
|
to that group, using a ttl of 1 |
|
|
|
Format of all sync packets is straight forward, packet type determines |
|
which kind of packet this is: |
|
|
|
0x0000 0x04 id of tracker instance |
|
0x0004 0x04 packet type |
|
|
|
######## |
|
######## PEER SYNC PROTOCOL ######## |
|
######## |
|
|
|
Each tracker instance accumulates announce requests until its buffer is |
|
full or a timeout is reached. Then it broadcasts its live sync packer: |
|
|
|
packet type SYNC_LIVE |
|
[ 0x0008 0x14 info_hash |
|
0x001c 0x04 peer's ipv4 address |
|
0x0020 0x02 peer's port |
|
0x0024 0x02 peer flags v1 ( SEEDING = 0x80, COMPLETE = 0x40, STOPPED = 0x20 ) |
|
]* |
|
|
|
*/ |
|
|
|
#ifdef WANT_SYNC_LIVE |
|
|
|
#define LIVESYNC_PORT 9696 |
|
|
|
void livesync_init(); |
|
void livesync_deinit(); |
|
|
|
/* Join multicast group for listening and create sending socket */ |
|
void livesync_bind_mcast( char *ip, uint16_t port ); |
|
|
|
/* Inform live sync about whats going on. */ |
|
void livesync_tell( struct ot_workstruct *ws ); |
|
|
|
/* Tickle the live sync module from time to time, so no events get |
|
stuck when there's not enough traffic to fill udp packets fast |
|
enough */ |
|
void livesync_ticker( ); |
|
|
|
/* Handle an incoming live sync packet */ |
|
void handle_livesync( const int64 sock ); |
|
|
|
#else |
|
|
|
/* If no syncing is required, save calling code from #ifdef |
|
constructions */ |
|
#define livesync_deinit() |
|
#define livesync_init() |
|
#define livesync_ticker() |
|
#define handle_livesync(a) |
|
|
|
#endif |
|
|
|
#endif
|
|
|