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erdgeist
parent
21b5baf0c1
commit
5168a3314c
470
proxy.c
470
proxy.c
@ -4,6 +4,7 @@
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$Id$ */
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/* System */
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <arpa/inet.h>
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@ -14,6 +15,7 @@
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#include <stdio.h>
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#include <pwd.h>
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#include <ctype.h>
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#include <pthread.h>
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/* Libowfat */
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#include "socket.h"
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@ -26,30 +28,59 @@
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/* Opentracker */
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#include "trackerlogic.h"
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#include "ot_vector.h"
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#include "ot_mutex.h"
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#include "ot_livesync.h"
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#include "ot_stats.h"
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ot_ip6 g_serverip;
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uint16_t g_serverport = 9009;
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uint32_t g_tracker_id;
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char groupip_1[4] = { 224,0,23,5 };
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char groupip_1[4] = { 224,0,23,5 };
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int g_self_pipe[2];
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/* If you have more than 10 peers, don't use this proxy
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Use 20 slots for 10 peers to have room for 10 incoming connection slots
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*/
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#define MAX_PEERS 20
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#define LIVESYNC_INCOMING_BUFFSIZE (256*256)
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#define STREAMSYNC_OUTGOING_BUFFSIZE (256*256)
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#define LIVESYNC_OUTGOING_BUFFSIZE_PEERS 1480
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#define LIVESYNC_OUTGOING_WATERMARK_PEERS (sizeof(ot_peer)+sizeof(ot_hash))
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enum { OT_SYNC_PEER };
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/* The amount of time a complete sync cycle should take */
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#define OT_SYNC_INTERVAL_MINUTES 2
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/* For outgoing packets */
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static int64 g_socket_in = -1;
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/* So after each bucket wait 1 / OT_BUCKET_COUNT intervals */
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#define OT_SYNC_SLEEP ( ( ( OT_SYNC_INTERVAL_MINUTES ) * 60 * 1000000 ) / ( OT_BUCKET_COUNT ) )
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enum { OT_SYNC_PEER };
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enum { FLAG_SERVERSOCKET = 1 };
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/* For incoming packets */
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static int64 g_socket_out = -1;
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static int64 g_socket_in = -1;
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static uint8_t g_inbuffer[LIVESYNC_INCOMING_BUFFSIZE];
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/* For outgoing packets */
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static int64 g_socket_out = -1;
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//static uint8_t g_outbuffer[STREAMSYNC_OUTGOING_BUFFSIZE];
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static void * livesync_worker( void * args );
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static void * streamsync_worker( void * args );
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void exerr( char * message ) {
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fprintf( stderr, "%s\n", message );
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exit( 111 );
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}
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void stats_issue_event( ot_status_event event, PROTO_FLAG proto, uintptr_t event_data ) {
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(void) event;
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(void) proto;
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(void) event_data;
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}
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void livesync_bind_mcast( ot_ip6 ip, uint16_t port) {
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char tmpip[4] = {0,0,0,0};
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char *v4ip;
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@ -80,16 +111,6 @@ void livesync_bind_mcast( ot_ip6 ip, uint16_t port) {
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socket_mcloop4(g_socket_out, 1);
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}
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static ot_vector all_torrents[OT_BUCKET_COUNT];
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ot_vector *mutex_bucket_lock_by_hash( ot_hash hash ) {
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return all_torrents + ( uint32_read_big( (char*)hash ) >> OT_BUCKET_COUNT_SHIFT );
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}
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ot_vector *mutex_bucket_lock( int bucket ) {
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return all_torrents + bucket;
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}
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#define mutex_bucket_unlock_by_hash(A,B)
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#define mutex_bucket_unlock(A)
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size_t add_peer_to_torrent_proxy( ot_hash hash, ot_peer *peer ) {
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int exactmatch;
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ot_torrent *torrent;
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@ -106,6 +127,7 @@ size_t add_peer_to_torrent_proxy( ot_hash hash, ot_peer *peer ) {
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if( !( torrent->peer_list = malloc( sizeof (ot_peerlist) ) ) ) {
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vector_remove_torrent( torrents_list, torrent );
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mutex_bucket_unlock_by_hash( hash, 0 );
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return -1;
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}
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@ -114,8 +136,10 @@ size_t add_peer_to_torrent_proxy( ot_hash hash, ot_peer *peer ) {
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/* Check for peer in torrent */
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peer_dest = vector_find_or_insert_peer( &(torrent->peer_list->peers), peer, &exactmatch );
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if( !peer_dest ) return -1;
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if( !peer_dest ) {
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mutex_bucket_unlock_by_hash( hash, 0 );
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return -1;
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}
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/* Tell peer that it's fresh */
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OT_PEERTIME( peer ) = 0;
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@ -126,6 +150,7 @@ size_t add_peer_to_torrent_proxy( ot_hash hash, ot_peer *peer ) {
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torrent->peer_list->seed_count++;
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}
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memcpy( peer_dest, peer, sizeof(ot_peer) );
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mutex_bucket_unlock_by_hash( hash, 0 );
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return 0;
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}
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@ -143,6 +168,7 @@ size_t remove_peer_from_torrent_proxy( ot_hash hash, ot_peer *peer ) {
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}
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}
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mutex_bucket_unlock_by_hash( hash, 0 );
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return 0;
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}
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@ -182,16 +208,243 @@ int usage( char *self ) {
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return 0;
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}
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static uint32_t peer_counts[1024];
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#ifdef WANT_SCROOOOOOOLL
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static char*to_hex(char*d,uint8_t*s){char*m="0123456789ABCDEF";char *t=d;char*e=d+40;while(d<e){*d++=m[*s>>4];*d++=m[*s++&15];}*d=0;return t;}
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#endif
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enum {
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FLAG_OUTGOING = 0x80,
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FLAG_DISCONNECTED = 0x00,
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FLAG_CONNECTING = 0x01,
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FLAG_WAITTRACKERID = 0x02,
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FLAG_CONNECTED = 0x03,
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FLAG_MASK = 0x07
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};
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#define PROXYPEER_NEEDSCONNECT(flag) ((flag)==FLAG_OUTGOING)
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#define PROXYPEER_SETDISCONNECTED(flag) (flag)=(((flag)&FLAG_OUTGOING)|FLAG_DISCONNECTED)
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#define PROXYPEER_SETCONNECTING(flag) (flag)=(((flag)&FLAG_OUTGOING)|FLAG_CONNECTING)
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#define PROXYPEER_SETWAITTRACKERID(flag) (flag)=(((flag)&FLAG_OUTGOING)|FLAG_WAITTRACKERID)
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#define PROXYPEER_SETCONNECTED(flag) (flag)=(((flag)&FLAG_OUTGOING)|FLAG_CONNECTED)
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typedef struct {
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int state; /* Whether we want to connect, how far our handshake is, etc. */
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ot_ip6 ip; /* The peer to connect to */
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uint16_t port; /* The peers port */
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uint8_t *indata; /* Any data not processed yet */
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size_t indata_length; /* Length of unprocessed data */
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uint32_t tracker_id; /* How the other end greeted */
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int64 fd; /* A file handle, if connected, <= 0 is disconnected (0 initially, -1 else) */
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io_batch outdata; /* The iobatch containing our sync data */
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} proxy_peer;
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/* Number of connections to peers
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* If a peer's IP is set, we try to reconnect, when the connection drops
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* If we already have a connected tracker_id in our records for an _incoming_ connection, drop it
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* Multiple connections to/from the same ip are okay, if tracker_id doesn't match
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* Reconnect attempts occur only twice a minute
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*/
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static int g_connection_count;
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static ot_time g_connection_reconn;
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static proxy_peer g_connections[MAX_PEERS];
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static void handle_reconnects( void ) {
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int i;
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for( i=0; i<g_connection_count; ++i )
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if( PROXYPEER_NEEDSCONNECT( g_connections[i].state ) ) {
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int64 newfd = socket_tcp6( );
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if( newfd < 0 ) continue; /* No socket for you */
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io_fd(newfd);
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if( socket_bind6_reuse(newfd,g_serverip,g_serverport,0) ) {
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io_close( newfd );
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continue;
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}
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if( socket_connect6(newfd,g_connections[i].ip,g_connections[i].port,0) == -1 &&
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errno != EINPROGRESS && errno != EWOULDBLOCK ) {
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close(newfd);
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continue;
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}
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io_wantwrite(newfd); /* So we will be informed when it is connected */
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io_setcookie(newfd,g_connections+i);
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/* Prepare connection info block */
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free( g_connections[i].indata );
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g_connections[i].indata = 0;
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g_connections[i].indata_length = 0;
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g_connections[i].fd = newfd;
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g_connections[i].tracker_id = 0;
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iob_reset( &g_connections[i].outdata );
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PROXYPEER_SETCONNECTING( g_connections[i].state );
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}
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g_connection_reconn = time(NULL) + 30;
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}
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/* Handle incoming connection requests, check against whitelist */
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static void handle_accept( int64 serversocket ) {
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int64 newfd;
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ot_ip6 ip;
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uint16 port;
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while( ( newfd = socket_accept6( serversocket, ip, &port, NULL ) ) != -1 ) {
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/* XXX some access control */
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/* Put fd into a non-blocking mode */
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io_nonblock( newfd );
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if( !io_fd( newfd ) )
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io_close( newfd );
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else {
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/* Find a new home for our incoming connection */
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int i;
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for( i=0; i<MAX_PEERS; ++i )
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if( g_connections[i].state == FLAG_DISCONNECTED )
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break;
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if( i == MAX_PEERS ) {
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fprintf( stderr, "No room for incoming connection." );
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close( newfd );
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continue;
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}
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/* Prepare connection info block */
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free( g_connections[i].indata );
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g_connections[i].indata = 0;
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g_connections[i].indata_length = 0;
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g_connections[i].port = port;
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g_connections[i].fd = newfd;
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g_connections[i].tracker_id = 0;
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iob_reset( &g_connections[i].outdata );
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g_connections[i].tracker_id = 0;
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PROXYPEER_SETCONNECTING( g_connections[i].state );
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io_setcookie( newfd, g_connections + i );
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/* We expect the connecting side to begin with its tracker_id */
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io_wantread( newfd );
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}
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}
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return;
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}
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/* New sync data on the stream */
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static void handle_read( int64 peersocket ) {
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uint32_t tracker_id;
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proxy_peer *peer = io_getcookie( peersocket );
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if( !peer ) {
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/* Can't happen ;) */
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close( peersocket );
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return;
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}
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switch( peer->state & FLAG_MASK ) {
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case FLAG_DISCONNECTED: break; /* Shouldnt happen */
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case FLAG_CONNECTING:
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case FLAG_WAITTRACKERID:
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/* We want at least the first four bytes to come at once, to avoid keeping extra states (for now) */
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if( io_tryread( peersocket, &tracker_id, sizeof( tracker_id ) ) != sizeof( tracker_id ) )
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goto close_socket;
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/* See, if we already have a connection to that peer */
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for( i=0; i<MAX_PEERS; ++i )
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if( ( g_connections[i].state & FLAG_MASK ) == FLAG_CONNECTED &&
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g_connections[i].tracker_id == tracker_id )
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goto close_socket;
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/* Also no need for soliloquy */
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if( tracker_id == g_tracker_id )
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goto close_socket;
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/* The new connection is good, send our tracker_id on incoming connections */
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if( peer->state == FLAG_CONNECTING )
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io_trywrite( peersocket, (void*)&g_tracker_id, sizeof( g_tracker_id ) );
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peer->tracker_id = tracker_id;
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PROXYPEER_SETCONNECTED( peer->state );
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break;
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close_socket:
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io_close( peersocket );
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PROXYPEER_SETDISCONNECTED( peer->state );
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break;
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case FLAG_CONNECTED:
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break;
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}
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}
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/* Can write new sync data to the stream */
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static void handle_write( int64 peersocket ) {
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proxy_peer *peer = io_getcookie( peersocket );
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if( !peer ) {
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/* Can't happen ;) */
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close( peersocket );
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return;
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}
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switch( peer->state & FLAG_MASK ) {
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case FLAG_DISCONNECTED: break; /* Shouldnt happen */
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case FLAG_CONNECTING:
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io_trywrite( peersocket, (void*)&g_tracker_id, sizeof( g_tracker_id ) );
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PROXYPEER_SETWAITTRACKERID( peer->state );
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io_dontwantwrite( peersocket );
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io_wantread( peersocket );
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break;
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case FLAG_CONNECTED:
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switch( iob_send( peersocket, &peer->outdata ) ) {
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case 0: /* all data sent */
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io_dontwantwrite( peersocket );
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break;
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case -3: /* an error occured */
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io_close( peersocket );
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PROXYPEER_SETDISCONNECTED( peer->state );
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iob_reset( &peer->outdata );
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free( peer->indata );
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default: /* Normal operation or eagain */
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break;
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}
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break;
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default:
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break;
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}
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return;
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}
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static void server_mainloop() {
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int64 sock;
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tai6464 now;
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while(1) {
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/* See, if we need to connect to anyone */
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if( time(NULL) > g_connection_reconn )
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handle_reconnects( );
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/* Wait for io events until next approx reconn check time */
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taia_now( &now );
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taia_addsec( &now, &now, 30 );
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io_waituntil( now );
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/* Loop over readable sockets */
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while( ( sock = io_canread( ) ) != -1 ) {
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const void *cookie = io_getcookie( sock );
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if( (uintptr_t)cookie == FLAG_SERVERSOCKET )
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handle_accept( sock );
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else
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handle_read( sock );
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}
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/* Loop over writable sockets */
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while( ( sock = io_canwrite( ) ) != -1 )
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handle_write( sock );
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}
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}
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int main( int argc, char **argv ) {
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static pthread_t sync_in_thread_id;
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static pthread_t sync_out_thread_id;
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ot_ip6 serverip;
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uint16_t tmpport;
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int scanon = 1, bound = 0;
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time_t next_dump = time(NULL)+1;
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srandom( time(NULL) );
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g_tracker_id = random();
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@ -199,7 +452,7 @@ int main( int argc, char **argv ) {
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while( scanon ) {
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switch( getopt( argc, argv, ":i:p:vh" ) ) {
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case -1: scanon = 0; break;
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case 'i':
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case 'S':
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if( !scan_ip6( optarg, serverip )) { usage( argv[0] ); exit( 1 ); }
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break;
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case 'p':
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@ -211,7 +464,144 @@ int main( int argc, char **argv ) {
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}
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if( !bound ) exerr( "No port bound." );
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pthread_create( &sync_in_thread_id, NULL, livesync_worker, NULL );
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pthread_create( &sync_out_thread_id, NULL, streamsync_worker, NULL );
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server_mainloop();
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return 0;
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}
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static void * streamsync_worker( void * args ) {
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(void)args;
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while( 1 ) {
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int bucket;
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/* For each bucket... */
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for( bucket=0; bucket<OT_BUCKET_COUNT; ++bucket ) {
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/* Get exclusive access to that bucket */
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ot_vector *torrents_list = mutex_bucket_lock( bucket );
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size_t tor_offset, count_def = 0, count_one = 0, count_two = 0, count_peers = 0;
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size_t mem, mem_a = 0, mem_b = 0;
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uint8_t *ptr, *ptr_a, *ptr_b, *ptr_c;
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/* For each torrent in this bucket.. */
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for( tor_offset=0; tor_offset<torrents_list->size; ++tor_offset ) {
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/* Address torrents members */
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ot_peerlist *peer_list = ( ((ot_torrent*)(torrents_list->data))[tor_offset] ).peer_list;
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switch( peer_list->peer_count ) {
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case 2: count_two++; break;
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case 1: count_one++; break;
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case 0: break;
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default:
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count_peers += peer_list->peer_count;
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count_def += 1 + ( peer_list->peer_count >> 8 );
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}
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}
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/* Maximal memory requirement: max 3 blocks, max torrents * 20 + max peers * 7 */
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mem = 3 * ( 4 + 1 + 1 + 2 ) + ( count_one + count_two ) * 19 + count_def * 20 +
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( count_one + 2 * count_two + count_peers ) * 7;
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ptr = ptr_a = ptr_b = ptr_c = malloc( mem );
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if( !ptr ) goto unlock_continue;
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if( count_one > 8 ) {
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mem_a = 4 + 1 + 1 + 2 + count_one * ( 19 + 7 );
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ptr_b += mem_a; ptr_c += mem_a;
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memcpy( ptr_a, &g_tracker_id, sizeof(g_tracker_id)); /* Offset 0: the tracker ID */
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ptr_a[4] = 1; /* Offset 4: packet type 1 */
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ptr_a[5] = (bucket << 8) >> OT_BUCKET_COUNT_BITS; /* Offset 5: the shared prefix */
|
||||
ptr_a[6] = count_one >> 8;
|
||||
ptr_a[7] = count_one & 255;
|
||||
ptr_a += 8;
|
||||
} else {
|
||||
count_def += count_one;
|
||||
count_peers += count_one;
|
||||
}
|
||||
|
||||
if( count_two > 8 ) {
|
||||
mem_b = 4 + 1 + 1 + 2 + count_two * ( 19 + 14 );
|
||||
ptr_c += mem_b;
|
||||
memcpy( ptr_b, &g_tracker_id, sizeof(g_tracker_id)); /* Offset 0: the tracker ID */
|
||||
ptr_b[4] = 2; /* Offset 4: packet type 2 */
|
||||
ptr_b[5] = (bucket << 8) >> OT_BUCKET_COUNT_BITS; /* Offset 5: the shared prefix */
|
||||
ptr_b[6] = count_two >> 8;
|
||||
ptr_b[7] = count_two & 255;
|
||||
ptr_b += 8;
|
||||
} else {
|
||||
count_def += count_two;
|
||||
count_peers += 2 * count_two;
|
||||
}
|
||||
|
||||
if( count_def ) {
|
||||
memcpy( ptr_c, &g_tracker_id, sizeof(g_tracker_id)); /* Offset 0: the tracker ID */
|
||||
ptr_c[4] = 0; /* Offset 4: packet type 0 */
|
||||
ptr_c[5] = (bucket << 8) >> OT_BUCKET_COUNT_BITS; /* Offset 5: the shared prefix */
|
||||
ptr_c[6] = count_def >> 8;
|
||||
ptr_c[7] = count_def & 255;
|
||||
ptr_c += 8;
|
||||
}
|
||||
|
||||
/* For each torrent in this bucket.. */
|
||||
for( tor_offset=0; tor_offset<torrents_list->size; ++tor_offset ) {
|
||||
/* Address torrents members */
|
||||
ot_torrent *torrent = ((ot_torrent*)(torrents_list->data)) + tor_offset;
|
||||
ot_peerlist *peer_list = torrent->peer_list;
|
||||
ot_peer *peers = (ot_peer*)(peer_list->peers.data);
|
||||
uint8_t **dst;
|
||||
int multi = 0;
|
||||
switch( peer_list->peer_count ) {
|
||||
case 0: continue;
|
||||
case 1: dst = mem_a ? &ptr_a : &ptr_c; break;
|
||||
case 2: dst = mem_b ? &ptr_b : &ptr_c; break;
|
||||
default: dst = &ptr_c; multi = 1; break;
|
||||
}
|
||||
|
||||
do {
|
||||
size_t i, pc = peer_list->peer_count;
|
||||
if( pc > 255 ) pc = 255;
|
||||
memcpy( *dst, torrent->hash + 1, sizeof( ot_hash ) - 1);
|
||||
*dst += sizeof( ot_hash ) - 1;
|
||||
if( multi ) *(*dst)++ = pc;
|
||||
for( i=0; i < pc; ++i ) {
|
||||
memcpy( *dst, peers++, OT_IP_SIZE + 3 );
|
||||
*dst += OT_IP_SIZE + 3;
|
||||
}
|
||||
peer_list->peer_count -= pc;
|
||||
} while( peer_list->peer_count );
|
||||
free_peerlist(peer_list);
|
||||
}
|
||||
|
||||
free( torrents_list->data );
|
||||
memset( torrents_list, 0, sizeof(*torrents_list ) );
|
||||
unlock_continue:
|
||||
mutex_bucket_unlock( bucket, 0 );
|
||||
|
||||
if( ptr ) {
|
||||
int i;
|
||||
|
||||
if( ptr_b > ptr_c ) ptr_c = ptr_b;
|
||||
if( ptr_a > ptr_c ) ptr_c = ptr_a;
|
||||
mem = ptr_c - ptr;
|
||||
|
||||
for( i=0; i<g_connection_count; ++i ) {
|
||||
if( g_connections[i].fd != -1 ) {
|
||||
void *tmp = malloc( mem );
|
||||
if( tmp )
|
||||
if( !iob_addbuf_free( &g_connections[i].outdata, tmp, mem ) )
|
||||
free( tmp );
|
||||
}
|
||||
}
|
||||
|
||||
free( ptr );
|
||||
}
|
||||
usleep( OT_SYNC_SLEEP );
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void * livesync_worker( void * args ) {
|
||||
(void)args;
|
||||
while( 1 ) {
|
||||
ot_ip6 in_ip; uint16_t in_port;
|
||||
size_t datalen = socket_recv4(g_socket_in, (char*)g_inbuffer, LIVESYNC_INCOMING_BUFFSIZE, 12+(char*)in_ip, &in_port);
|
||||
@ -223,7 +613,6 @@ int main( int argc, char **argv ) {
|
||||
/* drop packet coming from ourselves */
|
||||
continue;
|
||||
}
|
||||
|
||||
switch( uint32_read_big( sizeof( g_tracker_id ) + (char*)g_inbuffer ) ) {
|
||||
case OT_SYNC_PEER:
|
||||
livesync_handle_peersync( datalen );
|
||||
@ -232,37 +621,6 @@ int main( int argc, char **argv ) {
|
||||
fprintf( stderr, "Received an unknown live sync packet type %u.\n", uint32_read_big( sizeof( g_tracker_id ) + (char*)g_inbuffer ) );
|
||||
break;
|
||||
}
|
||||
if( time(NULL) > next_dump ) {
|
||||
int bucket, i;
|
||||
/* For each bucket... */
|
||||
for( bucket=0; bucket<OT_BUCKET_COUNT; ++bucket ) {
|
||||
/* Get exclusive access to that bucket */
|
||||
ot_vector *torrents_list = mutex_bucket_lock( bucket );
|
||||
size_t tor_offset;
|
||||
|
||||
/* For each torrent in this bucket.. */
|
||||
for( tor_offset=0; tor_offset<torrents_list->size; ++tor_offset ) {
|
||||
/* Address torrents members */
|
||||
ot_peerlist *peer_list = ( ((ot_torrent*)(torrents_list->data))[tor_offset] ).peer_list;
|
||||
#ifdef WANT_SCROOOOOOOLL
|
||||
ot_hash *hash =&( ((ot_torrent*)(torrents_list->data))[tor_offset] ).hash;
|
||||
char hash_out[41];
|
||||
to_hex(hash_out,*hash);
|
||||
printf( "%s %08zd\n", hash_out, peer_list->peer_count );
|
||||
#endif
|
||||
if(peer_list->peer_count<1024) peer_counts[peer_list->peer_count]++; else peer_counts[1023]++;
|
||||
free_peerlist(peer_list);
|
||||
}
|
||||
free( torrents_list->data );
|
||||
memset( torrents_list, 0, sizeof(*torrents_list ) );
|
||||
}
|
||||
for( i=1023; i>=0; --i )
|
||||
if( peer_counts[i] ) {
|
||||
printf( "%d:%d ", i, peer_counts[i] );
|
||||
peer_counts[i] = 0;
|
||||
}
|
||||
printf( "\n" );
|
||||
next_dump = time(NULL) + 1;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user