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86 lines
2.2 KiB
86 lines
2.2 KiB
16 years ago
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/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
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It is considered beerware. Prost. Skol. Cheers or whatever.
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$id$ */
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#ifndef __OT_LIVESYNC_H__
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#define __OT_LIVESYNC_H__
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#include "io.h"
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#include "trackerlogic.h"
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/*
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Syncing is done as udp packets in the multicast domain 224.23.42.N port 9696
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Each tracker should join the multicast group and send its live sync packets
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to that group, using a ttl of 1
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Format of a live sync packet is straight forward and depends on N:
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For N == 1: (simple tracker2tracker sync)
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0x0000 0x04 id of tracker instance
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[ 0x0004 0x14 info_hash
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0x0018 0x04 peer's ipv4 address
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0x001c 0x02 peer's port
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0x0020 0x02 peer flags v1 ( SEEDING = 0x80, COMPLETE = 0x40, STOPPED = 0x20 )
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]*
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For N == 2: (aggregator syncs)
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0x0000 0x04 id of tracker instance
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[ 0x0004 0x14 info_hash
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0x0018 0x01 number of peers
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[ 0x0019 0x04 peer's ipv4 address
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0x001a 0x02 peer's port
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0x0021 0x02 peer flags v1 ( SEEDING = 0x80, COMPLETE = 0x40, STOPPED = 0x20 )
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]+
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]*
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*/
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#ifdef WANT_SYNC_LIVE
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#define LIVESYNC_PORT 9696
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#define LIVESYNC_MCASTDOMAIN_1 224,23,42,1
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#define LIVESYNC_MCASTDOMAIN_2 224,23,42,2
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extern char groupip_1[4];
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extern char groupip_2[4];
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extern int64 g_livesync_socket;
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#define LIVESYNC_BUFFINSIZE (256*256)
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#define LIVESYNC_BUFFSIZE 1504
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#define LIVESYNC_BUFFWATER (sizeof(ot_peer)+sizeof(ot_hash))
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#define LIVESYNC_MAXDELAY 15
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void livesync_init();
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void livesync_deinit();
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/* Join multicast group for listening and create sending socket */
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void livesync_bind_mcast( char *ip, uint16_t port );
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/* Inform live sync about whats going on. */
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void livesync_tell( ot_hash * const info_hash, const ot_peer * const peer, const uint8_t peerflag );
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/* Tickle the live sync module from time to time, so no events get
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stuck when there's not enough traffic to fill udp packets fast
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enough */
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void livesync_ticker( );
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/* Handle an incoming live sync packet */
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void handle_livesync( const int64 serversocket );
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#else
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/* If no syncing is required, save calling code from #ifdef
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constructions */
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#define livesync_init()
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#define livesync_ticker()
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#define handle_livesync(a)
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#endif
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#endif
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