|
|
|
/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
|
|
|
|
It is considered beerware. Prost. Skol. Cheers or whatever.
|
|
|
|
|
|
|
|
$id$ */
|
|
|
|
|
|
|
|
/* System */
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <sys/uio.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <pthread.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
|
|
|
|
/* Libowfat */
|
|
|
|
#include "socket.h"
|
|
|
|
#include "ndelay.h"
|
|
|
|
#include "byte.h"
|
|
|
|
#include "ip6.h"
|
|
|
|
|
|
|
|
/* Opentracker */
|
|
|
|
#include "trackerlogic.h"
|
|
|
|
#include "ot_livesync.h"
|
|
|
|
#include "ot_accesslist.h"
|
|
|
|
#include "ot_stats.h"
|
|
|
|
#include "ot_mutex.h"
|
|
|
|
|
|
|
|
#ifdef WANT_SYNC_LIVE
|
|
|
|
|
|
|
|
char groupip_1[4] = { 224,0,23,5 };
|
|
|
|
|
|
|
|
#define LIVESYNC_INCOMING_BUFFSIZE (256*256)
|
|
|
|
|
|
|
|
#define LIVESYNC_OUTGOING_BUFFSIZE_PEERS 1480
|
|
|
|
#define LIVESYNC_OUTGOING_WATERMARK_PEERS (sizeof(ot_peer)+sizeof(ot_hash))
|
|
|
|
|
|
|
|
#ifdef WANT_SYNC_SCRAPE
|
|
|
|
#define LIVESYNC_OUTGOING_BUFFSIZE_SCRAPE 1504
|
|
|
|
#define LIVESYNC_OUTGOING_WATERMARK_SCRAPE (sizeof(ot_hash)+sizeof(uint64_t)+sizeof(uint32_t))
|
|
|
|
#define LIVESYNC_OUTGOING_MAXPACKETS_SCRAPE 100
|
|
|
|
|
|
|
|
#define LIVESYNC_FIRST_BEACON_DELAY (30*60) /* seconds */
|
|
|
|
#define LIVESYNC_BEACON_INTERVAL 60 /* seconds */
|
|
|
|
#define LIVESYNC_INQUIRE_THRESH 0.75
|
|
|
|
#endif /* WANT_SYNC_SCRAPE */
|
|
|
|
|
|
|
|
#define LIVESYNC_MAXDELAY 15 /* seconds */
|
|
|
|
|
|
|
|
enum { OT_SYNC_PEER
|
|
|
|
#ifdef WANT_SYNC_SCRAPE
|
|
|
|
, OT_SYNC_SCRAPE_BEACON, OT_SYNC_SCRAPE_INQUIRE, OT_SYNC_SCRAPE_TELL
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Forward declaration */
|
|
|
|
static void * livesync_worker( void * args );
|
|
|
|
|
|
|
|
/* For outgoing packets */
|
|
|
|
static int64 g_socket_in = -1;
|
|
|
|
|
|
|
|
/* For incoming packets */
|
|
|
|
static int64 g_socket_out = -1;
|
|
|
|
static uint8_t g_inbuffer[LIVESYNC_INCOMING_BUFFSIZE];
|
|
|
|
|
|
|
|
static uint8_t g_peerbuffer_start[LIVESYNC_OUTGOING_BUFFSIZE_PEERS];
|
|
|
|
static uint8_t *g_peerbuffer_pos;
|
|
|
|
static uint8_t *g_peerbuffer_highwater = g_peerbuffer_start + LIVESYNC_OUTGOING_BUFFSIZE_PEERS - LIVESYNC_OUTGOING_WATERMARK_PEERS;
|
|
|
|
|
|
|
|
static ot_time g_next_packet_time;
|
|
|
|
|
|
|
|
#ifdef WANT_SYNC_SCRAPE
|
|
|
|
/* Live sync scrape buffers, states and timers */
|
|
|
|
static ot_time g_next_beacon_time;
|
|
|
|
static ot_time g_next_inquire_time;
|
|
|
|
|
|
|
|
static uint8_t g_scrapebuffer_start[LIVESYNC_OUTGOING_BUFFSIZE_SCRAPE];
|
|
|
|
static uint8_t *g_scrapebuffer_pos;
|
|
|
|
static uint8_t *g_scrapebuffer_highwater = g_scrapebuffer_start + LIVESYNC_OUTGOING_BUFFSIZE_SCRAPE - LIVESYNC_OUTGOING_WATERMARK_SCRAPE;
|
|
|
|
|
|
|
|
static size_t g_inquire_remote_count;
|
|
|
|
static uint32_t g_inquire_remote_host;
|
|
|
|
static int g_inquire_inprogress;
|
|
|
|
static int g_inquire_bucket;
|
|
|
|
#endif /* WANT_SYNC_SCRAPE */
|
|
|
|
|
|
|
|
static pthread_t thread_id;
|
|
|
|
void livesync_init( ) {
|
|
|
|
if( g_socket_in == -1 )
|
|
|
|
exerr( "No socket address for live sync specified." );
|
|
|
|
|
|
|
|
/* Prepare outgoing peers buffer */
|
|
|
|
g_peerbuffer_pos = g_peerbuffer_start;
|
|
|
|
memcpy( g_peerbuffer_pos, &g_tracker_id, sizeof( g_tracker_id ) );
|
|
|
|
uint32_pack_big( (char*)g_peerbuffer_pos + sizeof( g_tracker_id ), OT_SYNC_PEER);
|
|
|
|
g_peerbuffer_pos += sizeof( g_tracker_id ) + sizeof( uint32_t);
|
|
|
|
|
|
|
|
#ifdef WANT_SYNC_SCRAPE
|
|
|
|
/* Prepare outgoing scrape buffer */
|
|
|
|
g_scrapebuffer_pos = g_scrapebuffer_start;
|
|
|
|
memcpy( g_scrapebuffer_pos, &g_tracker_id, sizeof( g_tracker_id ) );
|
|
|
|
uint32_pack_big( (char*)g_scrapebuffer_pos + sizeof( g_tracker_id ), OT_SYNC_SCRAPE_TELL);
|
|
|
|
g_scrapebuffer_pos += sizeof( g_tracker_id ) + sizeof( uint32_t);
|
|
|
|
|
|
|
|
/* Wind up timers for inquires */
|
|
|
|
g_next_beacon_time = g_now_seconds + LIVESYNC_FIRST_BEACON_DELAY;
|
|
|
|
#endif /* WANT_SYNC_SCRAPE */
|
|
|
|
g_next_packet_time = g_now_seconds + LIVESYNC_MAXDELAY;
|
|
|
|
|
|
|
|
pthread_create( &thread_id, NULL, livesync_worker, NULL );
|
|
|
|
}
|
|
|
|
|
|
|
|
void livesync_deinit() {
|
|
|
|
if( g_socket_in != -1 )
|
|
|
|
close( g_socket_in );
|
|
|
|
if( g_socket_out != -1 )
|
|
|
|
close( g_socket_out );
|
|
|
|
|
|
|
|
pthread_cancel( thread_id );
|
|
|
|
}
|
|
|
|
|
|
|
|
void livesync_bind_mcast( ot_ip6 ip, uint16_t port) {
|
|
|
|
char tmpip[4] = {0,0,0,0};
|
|
|
|
char *v4ip;
|
|
|
|
|
|
|
|
if( !ip6_isv4mapped(ip))
|
|
|
|
exerr("v6 mcast support not yet available.");
|
|
|
|
v4ip = ip+12;
|
|
|
|
|
|
|
|
if( g_socket_in != -1 )
|
|
|
|
exerr("Error: Livesync listen ip specified twice.");
|
|
|
|
|
|
|
|
if( ( g_socket_in = socket_udp4( )) < 0)
|
|
|
|
exerr("Error: Cant create live sync incoming socket." );
|
|
|
|
ndelay_off(g_socket_in);
|
|
|
|
|
|
|
|
if( socket_bind4_reuse( g_socket_in, tmpip, port ) == -1 )
|
|
|
|
exerr("Error: Cant bind live sync incoming socket." );
|
|
|
|
|
|
|
|
if( socket_mcjoin4( g_socket_in, groupip_1, v4ip ) )
|
|
|
|
exerr("Error: Cant make live sync incoming socket join mcast group.");
|
|
|
|
|
|
|
|
if( ( g_socket_out = socket_udp4()) < 0)
|
|
|
|
exerr("Error: Cant create live sync outgoing socket." );
|
|
|
|
if( socket_bind4_reuse( g_socket_out, v4ip, port ) == -1 )
|
|
|
|
exerr("Error: Cant bind live sync outgoing socket." );
|
|
|
|
|
|
|
|
socket_mcttl4(g_socket_out, 1);
|
|
|
|
socket_mcloop4(g_socket_out, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void livesync_issue_peersync( ) {
|
|
|
|
socket_send4(g_socket_out, (char*)g_peerbuffer_start, g_peerbuffer_pos - g_peerbuffer_start,
|
|
|
|
groupip_1, LIVESYNC_PORT);
|
|
|
|
g_peerbuffer_pos = g_peerbuffer_start + sizeof( g_tracker_id ) + sizeof( uint32_t );
|
|
|
|
g_next_packet_time = g_now_seconds + LIVESYNC_MAXDELAY;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void livesync_handle_peersync( ssize_t datalen ) {
|
|
|
|
int off = sizeof( g_tracker_id ) + sizeof( uint32_t );
|
|
|
|
|
|
|
|
/* Now basic sanity checks have been done on the live sync packet
|
|
|
|
We might add more testing and logging. */
|
|
|
|
while( off + (ssize_t)sizeof( ot_hash ) + (ssize_t)sizeof( ot_peer ) <= datalen ) {
|
|
|
|
ot_peer *peer = (ot_peer*)(g_inbuffer + off + sizeof(ot_hash));
|
|
|
|
ot_hash *hash = (ot_hash*)(g_inbuffer + off);
|
|
|
|
|
|
|
|
if( !g_opentracker_running ) return;
|
|
|
|
|
|
|
|
if( OT_PEERFLAG(peer) & PEER_FLAG_STOPPED )
|
|
|
|
remove_peer_from_torrent( *hash, peer, NULL, FLAG_MCA );
|
|
|
|
else
|
|
|
|
add_peer_to_torrent( *hash, peer, FLAG_MCA );
|
|
|
|
|
|
|
|
off += sizeof( ot_hash ) + sizeof( ot_peer );
|
|
|
|
}
|
|
|
|
|
|
|
|
stats_issue_event(EVENT_SYNC, 0,
|
|
|
|
(datalen - sizeof( g_tracker_id ) - sizeof( uint32_t ) ) /
|
|
|
|
((ssize_t)sizeof( ot_hash ) + (ssize_t)sizeof( ot_peer )));
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef WANT_SYNC_SCRAPE
|
|
|
|
void livesync_issue_beacon( ) {
|
|
|
|
size_t torrent_count = mutex_get_torrent_count();
|
|
|
|
uint8_t beacon[ sizeof(g_tracker_id) + sizeof(uint32_t) + sizeof( uint64_t ) ];
|
|
|
|
|
|
|
|
memcpy( beacon, &g_tracker_id, sizeof( g_tracker_id ) );
|
|
|
|
uint32_pack_big( (char*)beacon + sizeof( g_tracker_id ), OT_SYNC_SCRAPE_BEACON);
|
|
|
|
uint32_pack_big( (char*)beacon + sizeof( g_tracker_id ) + sizeof(uint32_t), (uint32_t)((uint64_t)(torrent_count)>>32) );
|
|
|
|
uint32_pack_big( (char*)beacon + sizeof( g_tracker_id ) + 2 * sizeof(uint32_t), (uint32_t)torrent_count );
|
|
|
|
|
|
|
|
socket_send4(g_socket_out, (char*)beacon, sizeof(beacon), groupip_1, LIVESYNC_PORT);
|
|
|
|
}
|
|
|
|
|
|
|
|
void livesync_handle_beacon( ssize_t datalen ) {
|
|
|
|
size_t torrent_count_local, torrent_count_remote;
|
|
|
|
if( datalen != sizeof(g_tracker_id) + sizeof(uint32_t) + sizeof( uint64_t ) )
|
|
|
|
return;
|
|
|
|
torrent_count_local = mutex_get_torrent_count();
|
|
|
|
torrent_count_remote = (size_t)(((uint64_t)uint32_read_big((char*)g_inbuffer+sizeof( g_tracker_id ) + sizeof(uint32_t))) << 32);
|
|
|
|
torrent_count_remote |= (size_t)uint32_read_big((char*)g_inbuffer+sizeof( g_tracker_id ) + 2 * sizeof(uint32_t));
|
|
|
|
|
|
|
|
/* Empty tracker is useless */
|
|
|
|
if( !torrent_count_remote ) return;
|
|
|
|
|
|
|
|
if( ((double)torrent_count_local ) / ((double)torrent_count_remote) < LIVESYNC_INQUIRE_THRESH) {
|
|
|
|
if( !g_next_inquire_time ) {
|
|
|
|
g_next_inquire_time = g_now_seconds + 2 * LIVESYNC_BEACON_INTERVAL;
|
|
|
|
g_inquire_remote_count = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if( torrent_count_remote > g_inquire_remote_count ) {
|
|
|
|
g_inquire_remote_count = torrent_count_remote;
|
|
|
|
memcpy( &g_inquire_remote_host, g_inbuffer, sizeof( g_tracker_id ) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void livesync_issue_inquire( ) {
|
|
|
|
uint8_t inquire[ sizeof(g_tracker_id) + sizeof(uint32_t) + sizeof(g_tracker_id)];
|
|
|
|
|
|
|
|
memcpy( inquire, &g_tracker_id, sizeof( g_tracker_id ) );
|
|
|
|
uint32_pack_big( (char*)inquire + sizeof( g_tracker_id ), OT_SYNC_SCRAPE_INQUIRE);
|
|
|
|
memcpy( inquire + sizeof(g_tracker_id) + sizeof(uint32_t), &g_inquire_remote_host, sizeof( g_tracker_id ) );
|
|
|
|
|
|
|
|
socket_send4(g_socket_out, (char*)inquire, sizeof(inquire), groupip_1, LIVESYNC_PORT);
|
|
|
|
}
|
|
|
|
|
|
|
|
void livesync_handle_inquire( ssize_t datalen ) {
|
|
|
|
if( datalen != sizeof(g_tracker_id) + sizeof(uint32_t) + sizeof(g_tracker_id) )
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* If it isn't us, they're inquiring, ignore inquiry */
|
|
|
|
if( memcmp( &g_tracker_id, g_inbuffer, sizeof( g_tracker_id ) ) )
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* Start scrape tell on next ticker */
|
|
|
|
if( !g_inquire_inprogress ) {
|
|
|
|
g_inquire_inprogress = 1;
|
|
|
|
g_inquire_bucket = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void livesync_issue_tell( ) {
|
|
|
|
int packets_to_send = LIVESYNC_OUTGOING_MAXPACKETS_SCRAPE;
|
|
|
|
while( packets_to_send > 0 && g_inquire_bucket < OT_BUCKET_COUNT ) {
|
|
|
|
ot_vector *torrents_list = mutex_bucket_lock( g_inquire_bucket );
|
|
|
|
unsigned int j;
|
|
|
|
for( j=0; j<torrents_list->size; ++j ) {
|
|
|
|
ot_torrent *torrent = (ot_torrent*)(torrents_list->data) + j;
|
|
|
|
memcpy(g_scrapebuffer_pos, torrent->hash, sizeof(ot_hash));
|
|
|
|
g_scrapebuffer_pos += sizeof(ot_hash);
|
|
|
|
uint32_pack_big( (char*)g_scrapebuffer_pos , (uint32_t)(g_now_minutes - torrent->peer_list->base ));
|
|
|
|
uint32_pack_big( (char*)g_scrapebuffer_pos + 4, (uint32_t)((uint64_t)(torrent->peer_list->down_count)>>32) );
|
|
|
|
uint32_pack_big( (char*)g_scrapebuffer_pos + 8, (uint32_t)torrent->peer_list->down_count );
|
|
|
|
g_scrapebuffer_pos += 12;
|
|
|
|
|
|
|
|
if( g_scrapebuffer_pos >= g_scrapebuffer_highwater ) {
|
|
|
|
socket_send4(g_socket_out, (char*)g_scrapebuffer_start, g_scrapebuffer_pos - g_scrapebuffer_start, groupip_1, LIVESYNC_PORT);
|
|
|
|
g_scrapebuffer_pos = g_scrapebuffer_start + sizeof( g_tracker_id ) + sizeof( uint32_t);
|
|
|
|
--packets_to_send;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
mutex_bucket_unlock( g_inquire_bucket++, 0 );
|
|
|
|
if( !g_opentracker_running )
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if( g_inquire_bucket == OT_BUCKET_COUNT ) {
|
|
|
|
socket_send4(g_socket_out, (char*)g_scrapebuffer_start, g_scrapebuffer_pos - g_scrapebuffer_start, groupip_1, LIVESYNC_PORT);
|
|
|
|
g_inquire_inprogress = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void livesync_handle_tell( ssize_t datalen ) {
|
|
|
|
int off = sizeof( g_tracker_id ) + sizeof( uint32_t );
|
|
|
|
|
|
|
|
/* Some instance is in progress of telling. Our inquiry was successful.
|
|
|
|
Don't ask again until we see next beacon. */
|
|
|
|
g_next_inquire_time = 0;
|
|
|
|
|
|
|
|
/* Don't cause any new inquiries during another tracker's tell */
|
|
|
|
if( g_next_beacon_time - g_now_seconds < LIVESYNC_BEACON_INTERVAL )
|
|
|
|
g_next_beacon_time = g_now_seconds + LIVESYNC_BEACON_INTERVAL;
|
|
|
|
|
|
|
|
while( off + sizeof(ot_hash) + 12 <= (size_t)datalen ) {
|
|
|
|
ot_hash *hash = (ot_hash*)(g_inbuffer+off);
|
|
|
|
ot_vector *torrents_list = mutex_bucket_lock_by_hash(*hash);
|
|
|
|
size_t down_count_remote;
|
|
|
|
int exactmatch;
|
|
|
|
ot_torrent *torrent = vector_find_or_insert(torrents_list, hash, sizeof(ot_hash), OT_HASH_COMPARE_SIZE, &exactmatch);
|
|
|
|
|
|
|
|
if( !torrent ) {
|
|
|
|
mutex_bucket_unlock_by_hash( *hash, 0 );
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if( !exactmatch ) {
|
|
|
|
/* Create a new torrent entry, then */
|
|
|
|
memcpy( &torrent->hash, hash, sizeof(ot_hash));
|
|
|
|
|
|
|
|
if( !( torrent->peer_list = malloc( sizeof (ot_peerlist) ) ) ) {
|
|
|
|
vector_remove_torrent( torrents_list, torrent );
|
|
|
|
mutex_bucket_unlock_by_hash( *hash, 0 );
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
byte_zero( torrent->peer_list, sizeof( ot_peerlist ) );
|
|
|
|
torrent->peer_list->base = g_now_minutes - uint32_read_big((char*)g_inbuffer+off+sizeof(ot_hash));
|
|
|
|
}
|
|
|
|
|
|
|
|
down_count_remote = (size_t)(((uint64_t)uint32_read_big((char*)g_inbuffer+off+sizeof(ot_hash ) + sizeof(uint32_t))) << 32);
|
|
|
|
down_count_remote |= (size_t) uint32_read_big((char*)g_inbuffer+off+sizeof(ot_hash ) + 2 * sizeof(uint32_t));
|
|
|
|
|
|
|
|
if( down_count_remote > torrent->peer_list->down_count )
|
|
|
|
torrent->peer_list->down_count = down_count_remote;
|
|
|
|
/* else
|
|
|
|
We might think of sending a tell packet, if we have a much larger downloaded count
|
|
|
|
*/
|
|
|
|
|
|
|
|
mutex_bucket_unlock( g_inquire_bucket++, exactmatch?0:1 );
|
|
|
|
if( !g_opentracker_running )
|
|
|
|
return;
|
|
|
|
off += sizeof(ot_hash) + 12;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* WANT_SYNC_SCRAPE */
|
|
|
|
|
|
|
|
/* 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( ) {
|
|
|
|
|
|
|
|
/* livesync_issue_peersync sets g_next_packet_time */
|
|
|
|
if( g_now_seconds > g_next_packet_time &&
|
|
|
|
g_peerbuffer_pos > g_peerbuffer_start + sizeof( g_tracker_id ) )
|
|
|
|
livesync_issue_peersync();
|
|
|
|
|
|
|
|
#ifdef WANT_SYNC_SCRAPE
|
|
|
|
/* Send first beacon after running at least LIVESYNC_FIRST_BEACON_DELAY
|
|
|
|
seconds and not more often than every LIVESYNC_BEACON_INTERVAL seconds */
|
|
|
|
if( g_now_seconds > g_next_beacon_time ) {
|
|
|
|
livesync_issue_beacon( );
|
|
|
|
g_next_beacon_time = g_now_seconds + LIVESYNC_BEACON_INTERVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If we're interested in an inquiry and waited long enough to see all
|
|
|
|
tracker's beacons, go ahead and inquire */
|
|
|
|
if( g_next_inquire_time && g_now_seconds > g_next_inquire_time ) {
|
|
|
|
livesync_issue_inquire();
|
|
|
|
|
|
|
|
/* If packet gets lost, ask again after LIVESYNC_BEACON_INTERVAL */
|
|
|
|
g_next_inquire_time = g_now_seconds + LIVESYNC_BEACON_INTERVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If we're in process of telling, let's tell. */
|
|
|
|
if( g_inquire_inprogress )
|
|
|
|
livesync_issue_tell( );
|
|
|
|
|
|
|
|
#endif /* WANT_SYNC_SCRAPE */
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Inform live sync about whats going on. */
|
|
|
|
void livesync_tell( ot_hash const info_hash, const ot_peer * const peer ) {
|
|
|
|
|
|
|
|
memcpy( g_peerbuffer_pos, info_hash, sizeof(ot_hash) );
|
|
|
|
memcpy( g_peerbuffer_pos+sizeof(ot_hash), peer, sizeof(ot_peer) );
|
|
|
|
|
|
|
|
g_peerbuffer_pos += sizeof(ot_hash)+sizeof(ot_peer);
|
|
|
|
|
|
|
|
if( g_peerbuffer_pos >= g_peerbuffer_highwater )
|
|
|
|
livesync_issue_peersync();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void * livesync_worker( void * args ) {
|
|
|
|
ot_ip6 in_ip; uint16_t in_port;
|
|
|
|
ssize_t datalen;
|
|
|
|
|
|
|
|
(void)args;
|
|
|
|
|
|
|
|
memcpy( in_ip, V4mappedprefix, sizeof( V4mappedprefix ) );
|
|
|
|
|
|
|
|
while( 1 ) {
|
|
|
|
datalen = socket_recv4(g_socket_in, (char*)g_inbuffer, LIVESYNC_INCOMING_BUFFSIZE, 12+(char*)in_ip, &in_port);
|
|
|
|
|
|
|
|
/* Expect at least tracker id and packet type */
|
|
|
|
if( datalen <= (ssize_t)(sizeof( g_tracker_id ) + sizeof( uint32_t )) )
|
|
|
|
continue;
|
|
|
|
if( !accesslist_isblessed(in_ip, OT_PERMISSION_MAY_LIVESYNC))
|
|
|
|
continue;
|
|
|
|
if( !memcmp( g_inbuffer, &g_tracker_id, sizeof( g_tracker_id ) ) ) {
|
|
|
|
/* TODO: log packet coming from ourselves */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch( uint32_read_big( sizeof( g_tracker_id ) + (char*)g_inbuffer ) ) {
|
|
|
|
case OT_SYNC_PEER:
|
|
|
|
livesync_handle_peersync( datalen );
|
|
|
|
break;
|
|
|
|
#ifdef WANT_SYNC_SCRAPE
|
|
|
|
case OT_SYNC_SCRAPE_BEACON:
|
|
|
|
livesync_handle_beacon( datalen );
|
|
|
|
break;
|
|
|
|
case OT_SYNC_SCRAPE_INQUIRE:
|
|
|
|
livesync_handle_inquire( datalen );
|
|
|
|
break;
|
|
|
|
case OT_SYNC_SCRAPE_TELL:
|
|
|
|
livesync_handle_tell( datalen );
|
|
|
|
break;
|
|
|
|
#endif /* WANT_SYNC_SCRAPE */
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Never returns. */
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|
|
|
|
const char *g_version_livesync_c = "$Source$: $Revision$\n";
|