mirror of
https://github.com/transmission/transmission
synced 2024-12-26 01:27:28 +00:00
504 lines
14 KiB
C
504 lines
14 KiB
C
/******************************************************************************
|
|
* $Id$
|
|
*
|
|
* Copyright (c) 2005-2008 Transmission authors and contributors
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*****************************************************************************/
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h> /* unlink, stat */
|
|
|
|
#include <event.h> /* struct evbuffer */
|
|
|
|
#include "transmission.h"
|
|
#include "session.h"
|
|
#include "bencode.h"
|
|
#include "crypto.h" /* tr_sha1 */
|
|
#include "metainfo.h"
|
|
#include "platform.h"
|
|
#include "utils.h"
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
static char*
|
|
getTorrentFilename( const tr_session * session,
|
|
const tr_info * inf )
|
|
{
|
|
return tr_strdup_printf( "%s%c%s.%16.16s.torrent",
|
|
tr_getTorrentDir( session ),
|
|
TR_PATH_DELIMITER,
|
|
inf->name,
|
|
inf->hashString );
|
|
}
|
|
|
|
static char*
|
|
getOldTorrentFilename( const tr_session * session,
|
|
const tr_info * inf )
|
|
{
|
|
char * ret;
|
|
struct evbuffer * buf = tr_getBuffer( );
|
|
|
|
evbuffer_add_printf( buf, "%s%c%s", tr_getTorrentDir( session ),
|
|
TR_PATH_DELIMITER,
|
|
inf->hashString );
|
|
if( session->tag )
|
|
evbuffer_add_printf( buf, "-%s", session->tag );
|
|
|
|
ret = tr_strndup( EVBUFFER_DATA( buf ), EVBUFFER_LENGTH( buf ) );
|
|
tr_releaseBuffer( buf );
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
tr_metainfoMigrate( tr_session * session,
|
|
tr_info * inf )
|
|
{
|
|
struct stat new_sb;
|
|
char * name = getTorrentFilename( session, inf );
|
|
|
|
if( stat( name, &new_sb ) || ( ( new_sb.st_mode & S_IFMT ) != S_IFREG ) )
|
|
{
|
|
char * old_name = getOldTorrentFilename( session, inf );
|
|
size_t contentLen;
|
|
uint8_t * content;
|
|
|
|
tr_mkdirp( tr_getTorrentDir( session ), 0777 );
|
|
if( ( content = tr_loadFile( old_name, &contentLen ) ) )
|
|
{
|
|
FILE * out;
|
|
errno = 0;
|
|
out = fopen( name, "wb+" );
|
|
if( !out )
|
|
{
|
|
tr_nerr( inf->name, _( "Couldn't create \"%1$s\": %2$s" ),
|
|
name, tr_strerror( errno ) );
|
|
}
|
|
else
|
|
{
|
|
if( fwrite( content, sizeof( uint8_t ), contentLen, out )
|
|
== contentLen )
|
|
{
|
|
tr_free( inf->torrent );
|
|
inf->torrent = tr_strdup( name );
|
|
tr_sessionSetTorrentFile( session, inf->hashString, name );
|
|
unlink( old_name );
|
|
}
|
|
fclose( out );
|
|
}
|
|
}
|
|
|
|
tr_free( content );
|
|
tr_free( old_name );
|
|
}
|
|
|
|
tr_free( name );
|
|
}
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
static int
|
|
getfile( char ** setme,
|
|
const char * root,
|
|
tr_benc * path )
|
|
{
|
|
int err;
|
|
|
|
if( !tr_bencIsList( path ) )
|
|
{
|
|
err = TR_EINVALID;
|
|
}
|
|
else
|
|
{
|
|
struct evbuffer * buf = tr_getBuffer( );
|
|
int n = tr_bencListSize( path );
|
|
int i;
|
|
|
|
evbuffer_add( buf, root, strlen( root ) );
|
|
for( i = 0; i < n; ++i )
|
|
{
|
|
const char * str;
|
|
if( tr_bencGetStr( tr_bencListChild( path, i ), &str )
|
|
&& strcmp( str, ".." ) )
|
|
{
|
|
evbuffer_add( buf, TR_PATH_DELIMITER_STR, 1 );
|
|
evbuffer_add( buf, str, strlen( str ) );
|
|
}
|
|
}
|
|
|
|
*setme = tr_strndup( EVBUFFER_DATA( buf ), EVBUFFER_LENGTH( buf ) );
|
|
/* fprintf( stderr, "[%s]\n", *setme ); */
|
|
tr_releaseBuffer( buf );
|
|
err = 0;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static const char*
|
|
parseFiles( tr_info * inf,
|
|
tr_benc * files,
|
|
const tr_benc * length )
|
|
{
|
|
int64_t len;
|
|
|
|
inf->totalSize = 0;
|
|
|
|
if( tr_bencIsList( files ) ) /* multi-file mode */
|
|
{
|
|
tr_file_index_t i;
|
|
|
|
inf->isMultifile = 1;
|
|
inf->fileCount = tr_bencListSize( files );
|
|
inf->files = tr_new0( tr_file, inf->fileCount );
|
|
|
|
for( i = 0; i < inf->fileCount; ++i )
|
|
{
|
|
tr_benc * file;
|
|
tr_benc * path;
|
|
|
|
file = tr_bencListChild( files, i );
|
|
if( !tr_bencIsDict( file ) )
|
|
return "files";
|
|
|
|
if( !tr_bencDictFindList( file, "path.utf-8", &path ) )
|
|
if( !tr_bencDictFindList( file, "path", &path ) )
|
|
return "path";
|
|
|
|
if( getfile( &inf->files[i].name, inf->name, path ) )
|
|
return "path";
|
|
|
|
if( !tr_bencDictFindInt( file, "length", &len ) )
|
|
return "length";
|
|
|
|
inf->files[i].length = len;
|
|
inf->totalSize += len;
|
|
}
|
|
}
|
|
else if( tr_bencGetInt( length, &len ) ) /* single-file mode */
|
|
{
|
|
inf->isMultifile = 0;
|
|
inf->fileCount = 1;
|
|
inf->files = tr_new0( tr_file, 1 );
|
|
inf->files[0].name = tr_strdup( inf->name );
|
|
inf->files[0].length = len;
|
|
inf->totalSize += len;
|
|
}
|
|
else
|
|
{
|
|
return "length";
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static char *
|
|
announceToScrape( const char * announce )
|
|
{
|
|
char * scrape = NULL;
|
|
const char * s;
|
|
|
|
/* To derive the scrape URL use the following steps:
|
|
* Begin with the announce URL. Find the last '/' in it.
|
|
* If the text immediately following that '/' isn't 'announce'
|
|
* it will be taken as a sign that that tracker doesn't support
|
|
* the scrape convention. If it does, substitute 'scrape' for
|
|
* 'announce' to find the scrape page. */
|
|
if( ( ( s =
|
|
strrchr( announce, '/' ) ) ) && !strncmp( ++s, "announce", 8 ) )
|
|
{
|
|
struct evbuffer * buf = tr_getBuffer( );
|
|
evbuffer_add( buf, announce, s - announce );
|
|
evbuffer_add( buf, "scrape", 6 );
|
|
evbuffer_add_printf( buf, "%s", s + 8 );
|
|
scrape = tr_strdup( EVBUFFER_DATA( buf ) );
|
|
tr_releaseBuffer( buf );
|
|
}
|
|
|
|
return scrape;
|
|
}
|
|
|
|
static const char*
|
|
getannounce( tr_info * inf,
|
|
tr_benc * meta )
|
|
{
|
|
const char * str;
|
|
tr_tracker_info * trackers = NULL;
|
|
int trackerCount = 0;
|
|
tr_benc * tiers;
|
|
|
|
/* Announce-list */
|
|
if( tr_bencDictFindList( meta, "announce-list", &tiers ) )
|
|
{
|
|
int n;
|
|
int i, j;
|
|
const int numTiers = tr_bencListSize( tiers );
|
|
|
|
n = 0;
|
|
for( i = 0; i < numTiers; ++i )
|
|
n += tr_bencListSize( tr_bencListChild( tiers, i ) );
|
|
|
|
trackers = tr_new0( tr_tracker_info, n );
|
|
trackerCount = 0;
|
|
|
|
for( i = 0; i < numTiers; ++i )
|
|
{
|
|
tr_benc * tier = tr_bencListChild( tiers, i );
|
|
const int tierSize = tr_bencListSize( tier );
|
|
for( j = 0; j < tierSize; ++j )
|
|
{
|
|
if( tr_bencGetStr( tr_bencListChild( tier, j ), &str ) )
|
|
{
|
|
char * url = tr_strstrip( tr_strdup( str ) );
|
|
if( tr_httpIsValidURL( url ) )
|
|
{
|
|
tr_tracker_info * t = trackers + trackerCount++;
|
|
t->tier = i;
|
|
t->announce = tr_strdup( url );
|
|
t->scrape = announceToScrape( url );
|
|
}
|
|
tr_free( url );
|
|
}
|
|
}
|
|
}
|
|
|
|
/* did we use any of the tiers? */
|
|
if( !trackerCount )
|
|
{
|
|
tr_free( trackers );
|
|
trackers = NULL;
|
|
}
|
|
}
|
|
|
|
/* Regular announce value */
|
|
if( !trackerCount
|
|
&& tr_bencDictFindStr( meta, "announce", &str ) )
|
|
{
|
|
char * url = tr_strstrip( tr_strdup( str ) );
|
|
if( tr_httpIsValidURL( url ) )
|
|
{
|
|
trackers = tr_new0( tr_tracker_info, 1 );
|
|
trackers[trackerCount].tier = 0;
|
|
trackers[trackerCount].announce = tr_strdup( url );
|
|
trackers[trackerCount++].scrape = announceToScrape( url );
|
|
/*fprintf( stderr, "single announce: [%s]\n", url );*/
|
|
}
|
|
tr_free( url );
|
|
}
|
|
|
|
inf->trackers = trackers;
|
|
inf->trackerCount = trackerCount;
|
|
|
|
return inf->trackerCount ? NULL : "announce";
|
|
}
|
|
|
|
static void
|
|
geturllist( tr_info * inf,
|
|
tr_benc * meta )
|
|
{
|
|
tr_benc * urls;
|
|
|
|
if( tr_bencDictFindList( meta, "url-list", &urls ) )
|
|
{
|
|
int i;
|
|
const char * url;
|
|
const int n = tr_bencListSize( urls );
|
|
|
|
inf->webseedCount = 0;
|
|
inf->webseeds = tr_new0( char*, n );
|
|
|
|
for( i = 0; i < n; ++i )
|
|
if( tr_bencGetStr( tr_bencListChild( urls, i ), &url ) )
|
|
inf->webseeds[inf->webseedCount++] = tr_strdup( url );
|
|
}
|
|
}
|
|
|
|
static const char*
|
|
tr_metainfoParseImpl( const tr_session * session,
|
|
tr_info * inf,
|
|
const tr_benc * meta_in )
|
|
{
|
|
int64_t i;
|
|
size_t raw_len;
|
|
const char * str;
|
|
const uint8_t * raw;
|
|
tr_benc * beInfo;
|
|
tr_benc * meta = (tr_benc *) meta_in;
|
|
|
|
/* info_hash: urlencoded 20-byte SHA1 hash of the value of the info key
|
|
* from the Metainfo file. Note that the value will be a bencoded
|
|
* dictionary, given the definition of the info key above. */
|
|
if( !tr_bencDictFindDict( meta, "info", &beInfo ) )
|
|
return "info";
|
|
else
|
|
{
|
|
int len;
|
|
char * bstr = tr_bencSave( beInfo, &len );
|
|
tr_sha1( inf->hash, bstr, len, NULL );
|
|
tr_sha1_to_hex( inf->hashString, inf->hash );
|
|
tr_free( bstr );
|
|
}
|
|
|
|
/* name */
|
|
if( !tr_bencDictFindStr( beInfo, "name.utf-8", &str ) )
|
|
if( !tr_bencDictFindStr( beInfo, "name", &str ) )
|
|
str = "";
|
|
if( !str || !*str )
|
|
return "name";
|
|
tr_free( inf->name );
|
|
inf->name = tr_strdup( str );
|
|
|
|
/* comment */
|
|
if( !tr_bencDictFindStr( meta, "comment.utf-8", &str ) )
|
|
if( !tr_bencDictFindStr( meta, "comment", &str ) )
|
|
str = "";
|
|
tr_free( inf->comment );
|
|
inf->comment = tr_strdup( str );
|
|
|
|
/* created by */
|
|
if( !tr_bencDictFindStr( meta, "created by.utf-8", &str ) )
|
|
if( !tr_bencDictFindStr( meta, "created by", &str ) )
|
|
str = "";
|
|
tr_free( inf->creator );
|
|
inf->creator = tr_strdup( str );
|
|
|
|
/* creation date */
|
|
if( !tr_bencDictFindInt( meta, "creation date", &i ) )
|
|
i = 0;
|
|
inf->dateCreated = i;
|
|
|
|
/* private */
|
|
if( !tr_bencDictFindInt( beInfo, "private", &i ) )
|
|
if( !tr_bencDictFindInt( meta, "private", &i ) )
|
|
i = 0;
|
|
inf->isPrivate = i != 0;
|
|
|
|
/* piece length */
|
|
if( !tr_bencDictFindInt( beInfo, "piece length", &i ) || ( i < 1 ) )
|
|
return "piece length";
|
|
inf->pieceSize = i;
|
|
|
|
/* pieces */
|
|
if( !tr_bencDictFindRaw( beInfo, "pieces", &raw,
|
|
&raw_len ) || ( raw_len % SHA_DIGEST_LENGTH ) )
|
|
return "pieces";
|
|
inf->pieceCount = raw_len / SHA_DIGEST_LENGTH;
|
|
inf->pieces = tr_new0( tr_piece, inf->pieceCount );
|
|
for( i = 0; i < inf->pieceCount; ++i )
|
|
memcpy( inf->pieces[i].hash, &raw[i * SHA_DIGEST_LENGTH],
|
|
SHA_DIGEST_LENGTH );
|
|
|
|
/* files */
|
|
if( ( str =
|
|
parseFiles( inf,
|
|
tr_bencDictFind( beInfo,
|
|
"files" ),
|
|
tr_bencDictFind( beInfo, "length" ) ) ) )
|
|
return str;
|
|
if( !inf->fileCount || !inf->totalSize )
|
|
return "files";
|
|
if( (uint64_t) inf->pieceCount !=
|
|
( inf->totalSize + inf->pieceSize - 1 ) / inf->pieceSize )
|
|
return "files";
|
|
|
|
/* get announce or announce-list */
|
|
if( ( str = getannounce( inf, meta ) ) )
|
|
return str;
|
|
|
|
/* get the url-list */
|
|
geturllist( inf, meta );
|
|
|
|
/* filename of Transmission's copy */
|
|
tr_free( inf->torrent );
|
|
inf->torrent = getTorrentFilename( session, inf );
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
tr_metainfoParse( const tr_session * session,
|
|
tr_info * inf,
|
|
const tr_benc * meta_in )
|
|
{
|
|
const char * badTag = tr_metainfoParseImpl( session, inf, meta_in );
|
|
|
|
if( badTag )
|
|
{
|
|
tr_nerr( inf->name, _( "Invalid metadata entry \"%s\"" ), badTag );
|
|
tr_metainfoFree( inf );
|
|
return TR_EINVALID;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
tr_metainfoFree( tr_info * inf )
|
|
{
|
|
tr_file_index_t ff;
|
|
int i;
|
|
|
|
for( i = 0; i < inf->webseedCount; ++i )
|
|
tr_free( inf->webseeds[i] );
|
|
|
|
for( ff = 0; ff < inf->fileCount; ++ff )
|
|
tr_free( inf->files[ff].name );
|
|
|
|
tr_free( inf->webseeds );
|
|
tr_free( inf->pieces );
|
|
tr_free( inf->files );
|
|
tr_free( inf->comment );
|
|
tr_free( inf->creator );
|
|
tr_free( inf->torrent );
|
|
tr_free( inf->name );
|
|
|
|
for( i = 0; i < inf->trackerCount; ++i )
|
|
{
|
|
tr_free( inf->trackers[i].announce );
|
|
tr_free( inf->trackers[i].scrape );
|
|
}
|
|
tr_free( inf->trackers );
|
|
|
|
memset( inf, '\0', sizeof( tr_info ) );
|
|
}
|
|
|
|
void
|
|
tr_metainfoRemoveSaved( const tr_session * session,
|
|
const tr_info * inf )
|
|
{
|
|
char * filename;
|
|
|
|
filename = getTorrentFilename( session, inf );
|
|
unlink( filename );
|
|
tr_free( filename );
|
|
|
|
filename = getOldTorrentFilename( session, inf );
|
|
unlink( filename );
|
|
tr_free( filename );
|
|
}
|
|
|