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opentracker – An open and free bittorrent tracker
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opentracker/ot_udp.c

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Have an own file handle udp requests.
17 years ago
/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
Introduce some kind of versioning
17 years ago
It is considered beerware. Prost. Skol. Cheers or whatever.
Whitespace fixes
16 years ago
Introduce some kind of versioning
17 years ago
$id$ */
Have an own file handle udp requests.
17 years ago
/* System */
#include <string.h>
Missing newline warning, missing include fixed
17 years ago
#include <arpa/inet.h>
Prepare udp connection id generation and checking
17 years ago
#include <stdio.h>
Have an own file handle udp requests.
17 years ago
/* Libowfat */
#include "socket.h"
#include "io.h"
/* Opentracker */
#include "trackerlogic.h"
#include "ot_udp.h"
#include "ot_stats.h"
Prepare udp connection id generation and checking
17 years ago
static const uint8_t g_static_connid[8] = { 0x23, 0x42, 0x05, 0x17, 0xde, 0x41, 0x50, 0xff };
V6
16 years ago
static void udp_make_connectionid( uint32_t * connid, const ot_ip6 remoteip ) {
Prepare udp connection id generation and checking
17 years ago
/* Touch unused variable */
Introduce some kind of versioning
17 years ago
(void)remoteip;
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17 years ago
/* Use a static secret for now */
V6
16 years ago
memcpy( connid, g_static_connid, 8 );
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17 years ago
}
Have an own file handle udp requests.
17 years ago
/* UDP implementation according to http://xbtt.sourceforge.net/udp_tracker_protocol.html */
V6
16 years ago
void handle_udp6( int64 serversocket, struct ot_workstruct *ws ) {
ot_ip6 remoteip;
* http and udp routines now use thread local buffers passed in workstruct containers. In other words they do not use static_buffer anymore and are considered to be thread safe. * the new workstruct also introduces a well defined buffer and result passing path * a new function scan_find_keywords is a wrapper around scan_urlencoded_query that maps keys in url to values passed in an array of ot_keywords structs * this new function cleans up much of url parameter parsing work, where read_ptr and write_ptr have been introduced rather than the confusing char *c, *data variables * I now use memcmp instead of byte_diff to allow compiler to optimize constant size string compares * got rid of UTORRENT_1600_WORKAROUND * livesync_ticker is now only called from one (currently main) thread to avoid race conditions
16 years ago
uint32_t *inpacket = (uint32_t*)ws->inbuf;
uint32_t *outpacket = (uint32_t*)ws->outbuf;
V6
16 years ago
uint32_t numwant, left, event, scopeid;
Drop ot_{byte,word,dword} and use uint{8,16,32}_t, also simplify includes
17 years ago
uint16_t port, remoteport;
Add comments, rename our struct http_data h to cookie, all clientsockets to sock, all size_t from socket_recvs to byte_count. Make signal handler set default handler for the second SIGINT
16 years ago
size_t byte_count, scrape_count;
Have an own file handle udp requests.
17 years ago
Add comments, rename our struct http_data h to cookie, all clientsockets to sock, all size_t from socket_recvs to byte_count. Make signal handler set default handler for the second SIGINT
16 years ago
byte_count = socket_recv6( serversocket, ws->inbuf, G_INBUF_SIZE, remoteip, &remoteport, &scopeid );
Have an own file handle udp requests.
17 years ago
V6
16 years ago
stats_issue_event( EVENT_ACCEPT, FLAG_UDP, (uintptr_t)remoteip );
Add comments, rename our struct http_data h to cookie, all clientsockets to sock, all size_t from socket_recvs to byte_count. Make signal handler set default handler for the second SIGINT
16 years ago
stats_issue_event( EVENT_READ, FLAG_UDP, byte_count );
Have an own file handle udp requests.
17 years ago
** struct ot_workstruct gets ritcher (and will become even ritcher soon). This is where we encapsulate all per-request data from peer to hash to peer_id, so that it is available everywhere without passing hundreds of pointers down the stack. Most functions that do work down the stack now accept an ot_workstruct and some flags. So it can end up in the stats/event-handler where it will be the default parameter in the future. ** peer_id is now being copied by default and moved to ot_workstruct So it is available in stats and subsequent functions. ** sync scrape madness is gone SYNC_SCRAPE was intended to sync tracker state that would normally be lost on restarts i.e. downloaded counts per torrent. The way was to push it in the tracker cloud after finding all neighbouring trackers. This is madness. It never was tested and can be done per tracker by fetching stats/mode=statedump from time to time and starting opentracker with the -l option later. ** livesync thread has its own ot_workstruct now So it can behave like ot_udp and ot_http against trackerlogic.c and get rid of the first half of the embarrassing global variables. The sending half will be fixed soon [tm]. ** stats can log completed events The author recognizes the needs of original content distributors to keep track of the amount of times a work has been downloaded. While not feasible and used on openbittorrent and other open and anonymous tracker installations, a tracker user can now choose to send those events to syslog.
15 years ago
/* Initialise hash pointer */
ws->hash = NULL;
ws->peer_id = NULL;
Have an own file handle udp requests.
17 years ago
/* Minimum udp tracker packet size, also catches error */
Add comments, rename our struct http_data h to cookie, all clientsockets to sock, all size_t from socket_recvs to byte_count. Make signal handler set default handler for the second SIGINT
16 years ago
if( byte_count < 16 )
Have an own file handle udp requests.
17 years ago
return;
switch( ntohl( inpacket[2] ) ) {
case 0: /* This is a connect action */
Do not lock out well behaving clients
17 years ago
/* look for udp bittorrent magic id */
if( (ntohl(inpacket[0]) != 0x00000417) || (ntohl(inpacket[1]) != 0x27101980) )
return;
Prepare udp connection id generation and checking
17 years ago
outpacket[0] = 0;
outpacket[1] = inpacket[3];
udp_make_connectionid( outpacket + 2, remoteip );
Do not lock out well behaving clients
17 years ago
V6
16 years ago
socket_send6( serversocket, ws->outbuf, 16, remoteip, remoteport, 0 );
added live sync code added a config file parser added tracker id changed WANT_CLOSED_TRACKER and WANT_BLACKLIST into WANT_ACCESS_WHITE and WANT_ACCESS_BLACK changed WANT_TRACKER_SYNC to WANT_SYNC_BATCH and added WANT_SYNC_LIVE added an option to switch off fullscrapes cleaned up many internal hardcoded values, like PROTO_FLAG,
16 years ago
stats_issue_event( EVENT_CONNECT, FLAG_UDP, 16 );
Have an own file handle udp requests.
17 years ago
break;
case 1: /* This is an announce action */
/* Minimum udp announce packet size */
Add comments, rename our struct http_data h to cookie, all clientsockets to sock, all size_t from socket_recvs to byte_count. Make signal handler set default handler for the second SIGINT
16 years ago
if( byte_count < 98 )
Have an own file handle udp requests.
17 years ago
return;
/* We do only want to know, if it is zero */
left = inpacket[64/4] | inpacket[68/4];
Fix endianess issues, also obey number of peers requested in udp announces
17 years ago
numwant = ntohl( inpacket[92/4] );
if (numwant > 200) numwant = 200;
** struct ot_workstruct gets ritcher (and will become even ritcher soon). This is where we encapsulate all per-request data from peer to hash to peer_id, so that it is available everywhere without passing hundreds of pointers down the stack. Most functions that do work down the stack now accept an ot_workstruct and some flags. So it can end up in the stats/event-handler where it will be the default parameter in the future. ** peer_id is now being copied by default and moved to ot_workstruct So it is available in stats and subsequent functions. ** sync scrape madness is gone SYNC_SCRAPE was intended to sync tracker state that would normally be lost on restarts i.e. downloaded counts per torrent. The way was to push it in the tracker cloud after finding all neighbouring trackers. This is madness. It never was tested and can be done per tracker by fetching stats/mode=statedump from time to time and starting opentracker with the -l option later. ** livesync thread has its own ot_workstruct now So it can behave like ot_udp and ot_http against trackerlogic.c and get rid of the first half of the embarrassing global variables. The sending half will be fixed soon [tm]. ** stats can log completed events The author recognizes the needs of original content distributors to keep track of the amount of times a work has been downloaded. While not feasible and used on openbittorrent and other open and anonymous tracker installations, a tracker user can now choose to send those events to syslog.
15 years ago
event = ntohl( inpacket[80/4] );
port = *(uint16_t*)( ((char*)inpacket) + 96 );
ws->hash = (ot_hash*)( ((char*)inpacket) + 16 );
Have an own file handle udp requests.
17 years ago
** struct ot_workstruct gets ritcher (and will become even ritcher soon). This is where we encapsulate all per-request data from peer to hash to peer_id, so that it is available everywhere without passing hundreds of pointers down the stack. Most functions that do work down the stack now accept an ot_workstruct and some flags. So it can end up in the stats/event-handler where it will be the default parameter in the future. ** peer_id is now being copied by default and moved to ot_workstruct So it is available in stats and subsequent functions. ** sync scrape madness is gone SYNC_SCRAPE was intended to sync tracker state that would normally be lost on restarts i.e. downloaded counts per torrent. The way was to push it in the tracker cloud after finding all neighbouring trackers. This is madness. It never was tested and can be done per tracker by fetching stats/mode=statedump from time to time and starting opentracker with the -l option later. ** livesync thread has its own ot_workstruct now So it can behave like ot_udp and ot_http against trackerlogic.c and get rid of the first half of the embarrassing global variables. The sending half will be fixed soon [tm]. ** stats can log completed events The author recognizes the needs of original content distributors to keep track of the amount of times a work has been downloaded. While not feasible and used on openbittorrent and other open and anonymous tracker installations, a tracker user can now choose to send those events to syslog.
15 years ago
OT_SETIP( &ws->peer, remoteip );
OT_SETPORT( &ws->peer, &port );
OT_PEERFLAG( &ws->peer ) = 0;
Have an own file handle udp requests.
17 years ago
switch( event ) {
** struct ot_workstruct gets ritcher (and will become even ritcher soon). This is where we encapsulate all per-request data from peer to hash to peer_id, so that it is available everywhere without passing hundreds of pointers down the stack. Most functions that do work down the stack now accept an ot_workstruct and some flags. So it can end up in the stats/event-handler where it will be the default parameter in the future. ** peer_id is now being copied by default and moved to ot_workstruct So it is available in stats and subsequent functions. ** sync scrape madness is gone SYNC_SCRAPE was intended to sync tracker state that would normally be lost on restarts i.e. downloaded counts per torrent. The way was to push it in the tracker cloud after finding all neighbouring trackers. This is madness. It never was tested and can be done per tracker by fetching stats/mode=statedump from time to time and starting opentracker with the -l option later. ** livesync thread has its own ot_workstruct now So it can behave like ot_udp and ot_http against trackerlogic.c and get rid of the first half of the embarrassing global variables. The sending half will be fixed soon [tm]. ** stats can log completed events The author recognizes the needs of original content distributors to keep track of the amount of times a work has been downloaded. While not feasible and used on openbittorrent and other open and anonymous tracker installations, a tracker user can now choose to send those events to syslog.
15 years ago
case 1: OT_PEERFLAG( &ws->peer ) |= PEER_FLAG_COMPLETED; break;
case 3: OT_PEERFLAG( &ws->peer ) |= PEER_FLAG_STOPPED; break;
Have an own file handle udp requests.
17 years ago
default: break;
}
if( !left )
** struct ot_workstruct gets ritcher (and will become even ritcher soon). This is where we encapsulate all per-request data from peer to hash to peer_id, so that it is available everywhere without passing hundreds of pointers down the stack. Most functions that do work down the stack now accept an ot_workstruct and some flags. So it can end up in the stats/event-handler where it will be the default parameter in the future. ** peer_id is now being copied by default and moved to ot_workstruct So it is available in stats and subsequent functions. ** sync scrape madness is gone SYNC_SCRAPE was intended to sync tracker state that would normally be lost on restarts i.e. downloaded counts per torrent. The way was to push it in the tracker cloud after finding all neighbouring trackers. This is madness. It never was tested and can be done per tracker by fetching stats/mode=statedump from time to time and starting opentracker with the -l option later. ** livesync thread has its own ot_workstruct now So it can behave like ot_udp and ot_http against trackerlogic.c and get rid of the first half of the embarrassing global variables. The sending half will be fixed soon [tm]. ** stats can log completed events The author recognizes the needs of original content distributors to keep track of the amount of times a work has been downloaded. While not feasible and used on openbittorrent and other open and anonymous tracker installations, a tracker user can now choose to send those events to syslog.
15 years ago
OT_PEERFLAG( &ws->peer ) |= PEER_FLAG_SEEDING;
Have an own file handle udp requests.
17 years ago
outpacket[0] = htonl( 1 ); /* announce action */
outpacket[1] = inpacket[12/4];
** struct ot_workstruct gets ritcher (and will become even ritcher soon). This is where we encapsulate all per-request data from peer to hash to peer_id, so that it is available everywhere without passing hundreds of pointers down the stack. Most functions that do work down the stack now accept an ot_workstruct and some flags. So it can end up in the stats/event-handler where it will be the default parameter in the future. ** peer_id is now being copied by default and moved to ot_workstruct So it is available in stats and subsequent functions. ** sync scrape madness is gone SYNC_SCRAPE was intended to sync tracker state that would normally be lost on restarts i.e. downloaded counts per torrent. The way was to push it in the tracker cloud after finding all neighbouring trackers. This is madness. It never was tested and can be done per tracker by fetching stats/mode=statedump from time to time and starting opentracker with the -l option later. ** livesync thread has its own ot_workstruct now So it can behave like ot_udp and ot_http against trackerlogic.c and get rid of the first half of the embarrassing global variables. The sending half will be fixed soon [tm]. ** stats can log completed events The author recognizes the needs of original content distributors to keep track of the amount of times a work has been downloaded. While not feasible and used on openbittorrent and other open and anonymous tracker installations, a tracker user can now choose to send those events to syslog.
15 years ago
if( OT_PEERFLAG( &ws->peer ) & PEER_FLAG_STOPPED ) { /* Peer is gone. */
ws->reply = ws->outbuf;
ws->reply_size = remove_peer_from_torrent( FLAG_UDP, ws );
} else {
ws->reply = ws->outbuf + 8;
ws->reply_size = 8 + add_peer_to_torrent_and_return_peers( FLAG_UDP, ws, numwant );
}
Have an own file handle udp requests.
17 years ago
** struct ot_workstruct gets ritcher (and will become even ritcher soon). This is where we encapsulate all per-request data from peer to hash to peer_id, so that it is available everywhere without passing hundreds of pointers down the stack. Most functions that do work down the stack now accept an ot_workstruct and some flags. So it can end up in the stats/event-handler where it will be the default parameter in the future. ** peer_id is now being copied by default and moved to ot_workstruct So it is available in stats and subsequent functions. ** sync scrape madness is gone SYNC_SCRAPE was intended to sync tracker state that would normally be lost on restarts i.e. downloaded counts per torrent. The way was to push it in the tracker cloud after finding all neighbouring trackers. This is madness. It never was tested and can be done per tracker by fetching stats/mode=statedump from time to time and starting opentracker with the -l option later. ** livesync thread has its own ot_workstruct now So it can behave like ot_udp and ot_http against trackerlogic.c and get rid of the first half of the embarrassing global variables. The sending half will be fixed soon [tm]. ** stats can log completed events The author recognizes the needs of original content distributors to keep track of the amount of times a work has been downloaded. While not feasible and used on openbittorrent and other open and anonymous tracker installations, a tracker user can now choose to send those events to syslog.
15 years ago
socket_send6( serversocket, ws->outbuf, ws->reply_size, remoteip, remoteport, 0 );
stats_issue_event( EVENT_ANNOUNCE, FLAG_UDP, ws->reply_size );
Have an own file handle udp requests.
17 years ago
break;
case 2: /* This is a scrape action */
outpacket[0] = htonl( 2 ); /* scrape action */
outpacket[1] = inpacket[12/4];
Add comments, rename our struct http_data h to cookie, all clientsockets to sock, all size_t from socket_recvs to byte_count. Make signal handler set default handler for the second SIGINT
16 years ago
for( scrape_count = 0; ( scrape_count * 20 < byte_count - 16) && ( scrape_count <= 74 ); scrape_count++ )
return_udp_scrape_for_torrent( *(ot_hash*)( ((char*)inpacket) + 16 + 20 * scrape_count ), ((char*)outpacket) + 8 + 12 * scrape_count );
Have an own file handle udp requests.
17 years ago
Add comments, rename our struct http_data h to cookie, all clientsockets to sock, all size_t from socket_recvs to byte_count. Make signal handler set default handler for the second SIGINT
16 years ago
socket_send6( serversocket, ws->outbuf, 8 + 12 * scrape_count, remoteip, remoteport, 0 );
stats_issue_event( EVENT_SCRAPE, FLAG_UDP, scrape_count );
Have an own file handle udp requests.
17 years ago
break;
}
}
Introduce some kind of versioning
17 years ago
* opentracker now drops permissions in correct order and really chroots() if ran as root * lock passing between add_peer_to_torrent and return_peers_for_torrent is now avoided by providing a more general add_peer_to_torrent_and_return_peers function that can be used with NULL parameters to not return any peers (in sync case) * in order to keep a fast overview how many torrents opentracker maintains, every mutex_bucket_unlock operation expects an additional integer parameter that tells ot_mutex.c how many torrents have been added or removed. A function mutex_get_torrent_count has been introduced.
16 years ago
void udp_init( ) {
}
Introduce some kind of versioning
17 years ago
const char *g_version_udp_c = "$Source$: $Revision$\n";