mirror of
https://github.com/transmission/transmission
synced 2024-12-26 17:47:37 +00:00
3374ce9a32
Adds announce list, support for code 301/302 redirect, improvements to mac inspector, better queueing with errors, random extra wait of up to a minute between announces, and other changes.
497 lines
16 KiB
C
497 lines
16 KiB
C
/******************************************************************************
|
|
* $Id$
|
|
*
|
|
* Copyright (c) 2005-2006 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 "transmission.h"
|
|
|
|
#define TORRENT_MAX_SIZE (5*1024*1024)
|
|
|
|
/***********************************************************************
|
|
* Local prototypes
|
|
**********************************************************************/
|
|
static int getannounce( tr_info_t * inf, benc_val_t * meta );
|
|
#define strcatUTF8( dst, src) _strcatUTF8( (dst), sizeof( dst ) - 1, (src) )
|
|
static void _strcatUTF8( char *, int, char * );
|
|
|
|
/***********************************************************************
|
|
* tr_metainfoParse
|
|
***********************************************************************
|
|
*
|
|
**********************************************************************/
|
|
int tr_metainfoParse( tr_info_t * inf, const char * path,
|
|
const char * savedHash, int saveCopy )
|
|
{
|
|
FILE * file;
|
|
char * buf;
|
|
benc_val_t meta, * beInfo, * list, * val;
|
|
int i;
|
|
struct stat sb;
|
|
|
|
assert( NULL == path || NULL == savedHash );
|
|
/* if savedHash isn't null, saveCopy should be false */
|
|
assert( NULL == savedHash || !saveCopy );
|
|
|
|
if( NULL != savedHash )
|
|
{
|
|
snprintf( inf->torrent, MAX_PATH_LENGTH, "%s/%s",
|
|
tr_getTorrentsDirectory(), savedHash );
|
|
path = inf->torrent;
|
|
}
|
|
|
|
if( stat( path, &sb ) )
|
|
{
|
|
tr_err( "Could not stat file (%s)", path );
|
|
return 1;
|
|
}
|
|
if( ( sb.st_mode & S_IFMT ) != S_IFREG )
|
|
{
|
|
tr_err( "Not a regular file (%s)", path );
|
|
return 1;
|
|
}
|
|
if( sb.st_size > TORRENT_MAX_SIZE )
|
|
{
|
|
tr_err( "Torrent file is too big (%d bytes)", (int)sb.st_size );
|
|
return 1;
|
|
}
|
|
|
|
/* Load the torrent file into our buffer */
|
|
file = fopen( path, "rb" );
|
|
if( !file )
|
|
{
|
|
tr_err( "Could not open file (%s)", path );
|
|
return 1;
|
|
}
|
|
buf = malloc( sb.st_size );
|
|
fseek( file, 0, SEEK_SET );
|
|
if( fread( buf, sb.st_size, 1, file ) != 1 )
|
|
{
|
|
tr_err( "Read error (%s)", path );
|
|
free( buf );
|
|
fclose( file );
|
|
return 1;
|
|
}
|
|
fclose( file );
|
|
|
|
/* Parse bencoded infos */
|
|
if( tr_bencLoad( buf, sb.st_size, &meta, NULL ) )
|
|
{
|
|
tr_err( "Error while parsing bencoded data" );
|
|
free( buf );
|
|
return 1;
|
|
}
|
|
|
|
/* Get info hash */
|
|
if( !( beInfo = tr_bencDictFind( &meta, "info" ) ) )
|
|
{
|
|
tr_err( "Could not find \"info\" dictionary" );
|
|
tr_bencFree( &meta );
|
|
free( buf );
|
|
return 1;
|
|
}
|
|
SHA1( (uint8_t *) beInfo->begin,
|
|
(long) beInfo->end - (long) beInfo->begin, inf->hash );
|
|
for( i = 0; i < SHA_DIGEST_LENGTH; i++ )
|
|
{
|
|
sprintf( inf->hashString + i * 2, "%02x", inf->hash[i] );
|
|
}
|
|
|
|
if( saveCopy )
|
|
{
|
|
/* Save a copy of the torrent file in the private torrent directory */
|
|
snprintf( inf->torrent, MAX_PATH_LENGTH, "%s/%s",
|
|
tr_getTorrentsDirectory(), inf->hashString );
|
|
file = fopen( inf->torrent, "wb" );
|
|
if( !file )
|
|
{
|
|
tr_err( "Could not open file (%s) (%s)",
|
|
inf->torrent, strerror(errno) );
|
|
tr_bencFree( &meta );
|
|
free( buf );
|
|
return 1;
|
|
}
|
|
fseek( file, 0, SEEK_SET );
|
|
if( fwrite( buf, sb.st_size, 1, file ) != 1 )
|
|
{
|
|
tr_err( "Write error (%s)", inf->torrent );
|
|
tr_bencFree( &meta );
|
|
free( buf );
|
|
fclose( file );
|
|
return 1;
|
|
}
|
|
fclose( file );
|
|
}
|
|
else
|
|
{
|
|
snprintf( inf->torrent, MAX_PATH_LENGTH, "%s", path );
|
|
}
|
|
|
|
/* We won't need this anymore */
|
|
free( buf );
|
|
|
|
/* Comment info */
|
|
if( ( val = tr_bencDictFind( &meta, "comment.utf-8" ) ) || ( val = tr_bencDictFind( &meta, "comment" ) ) )
|
|
{
|
|
strcatUTF8( inf->comment, val->val.s.s );
|
|
}
|
|
|
|
/* Creator info */
|
|
if( ( val = tr_bencDictFind( &meta, "created by.utf-8" ) ) || ( val = tr_bencDictFind( &meta, "created by" ) ) )
|
|
{
|
|
strcatUTF8( inf->creator, val->val.s.s );
|
|
}
|
|
|
|
/* Date created */
|
|
if( ( val = tr_bencDictFind( &meta, "creation date" ) ) )
|
|
{
|
|
inf->dateCreated = val->val.i;
|
|
}
|
|
else
|
|
{
|
|
inf->dateCreated = 0;
|
|
}
|
|
|
|
/* Private torrent */
|
|
if( ( val = tr_bencDictFind( beInfo, "private" ) ) && TYPE_INT == val->type )
|
|
{
|
|
inf->privateTorrent = val->val.i;
|
|
}
|
|
|
|
/* Piece length */
|
|
if( !( val = tr_bencDictFind( beInfo, "piece length" ) ) )
|
|
{
|
|
tr_err( "No \"piece length\" entry" );
|
|
tr_bencFree( &meta );
|
|
return 1;
|
|
}
|
|
inf->pieceSize = val->val.i;
|
|
|
|
/* Hashes */
|
|
val = tr_bencDictFind( beInfo, "pieces" );
|
|
if( val->val.s.i % SHA_DIGEST_LENGTH )
|
|
{
|
|
tr_err( "Invalid \"piece\" string (size is %d)", val->val.s.i );
|
|
tr_bencFree( &meta );
|
|
return 1;
|
|
}
|
|
inf->pieceCount = val->val.s.i / SHA_DIGEST_LENGTH;
|
|
inf->pieces = (uint8_t *) val->val.s.s; /* Ugly, but avoids a memcpy */
|
|
val->val.s.s = NULL;
|
|
|
|
/* TODO add more tests so we don't crash on weird files */
|
|
|
|
inf->totalSize = 0;
|
|
if( ( list = tr_bencDictFind( beInfo, "files" ) ) )
|
|
{
|
|
/* Multi-file mode */
|
|
int j;
|
|
|
|
val = tr_bencDictFind( beInfo, "name.utf-8" );
|
|
if( NULL == val )
|
|
{
|
|
val = tr_bencDictFind( beInfo, "name" );
|
|
}
|
|
strcatUTF8( inf->name, val->val.s.s );
|
|
|
|
inf->multifile = 1;
|
|
inf->fileCount = list->val.l.count;
|
|
inf->files = calloc( inf->fileCount * sizeof( tr_file_t ), 1 );
|
|
|
|
for( i = 0; i < list->val.l.count; i++ )
|
|
{
|
|
val = tr_bencDictFind( &list->val.l.vals[i], "path.utf-8" );
|
|
if( NULL == val )
|
|
{
|
|
val = tr_bencDictFind( &list->val.l.vals[i], "path" );
|
|
}
|
|
strcatUTF8( inf->files[i].name, inf->name );
|
|
for( j = 0; j < val->val.l.count; j++ )
|
|
{
|
|
strcatUTF8( inf->files[i].name, "/" );
|
|
strcatUTF8( inf->files[i].name,
|
|
val->val.l.vals[j].val.s.s );
|
|
}
|
|
val = tr_bencDictFind( &list->val.l.vals[i], "length" );
|
|
inf->files[i].length = val->val.i;
|
|
inf->totalSize += val->val.i;
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
/* Single-file mode */
|
|
inf->multifile = 0;
|
|
inf->fileCount = 1;
|
|
inf->files = calloc( sizeof( tr_file_t ), 1 );
|
|
|
|
val = tr_bencDictFind( beInfo, "name.utf-8" );
|
|
if( NULL == val )
|
|
{
|
|
val = tr_bencDictFind( beInfo, "name" );
|
|
}
|
|
strcatUTF8( inf->files[0].name, val->val.s.s );
|
|
strcatUTF8( inf->name, val->val.s.s );
|
|
|
|
val = tr_bencDictFind( beInfo, "length" );
|
|
inf->files[0].length = val->val.i;
|
|
inf->totalSize += val->val.i;
|
|
}
|
|
|
|
if( (uint64_t) inf->pieceCount !=
|
|
( inf->totalSize + inf->pieceSize - 1 ) / inf->pieceSize )
|
|
{
|
|
tr_err( "Size of hashes and files don't match" );
|
|
tr_metainfoFree( inf );
|
|
tr_bencFree( &meta );
|
|
return 1;
|
|
}
|
|
|
|
/* get announce or announce-list */
|
|
if( getannounce( inf, &meta ) )
|
|
{
|
|
tr_metainfoFree( inf );
|
|
tr_bencFree( &meta );
|
|
return 1;
|
|
}
|
|
|
|
tr_bencFree( &meta );
|
|
return 0;
|
|
}
|
|
|
|
void tr_metainfoFree( tr_info_t * inf )
|
|
{
|
|
int ii, jj;
|
|
|
|
free( inf->pieces );
|
|
free( inf->files );
|
|
|
|
for( ii = 0; ii < inf->trackerTiers; ii++ )
|
|
{
|
|
for( jj = 0; jj < inf->trackerList[ii].count; jj++ )
|
|
{
|
|
free( inf->trackerList[ii].list[jj].address );
|
|
free( inf->trackerList[ii].list[jj].announce );
|
|
}
|
|
free( inf->trackerList[ii].list );
|
|
}
|
|
free( inf->trackerList );
|
|
}
|
|
|
|
static int getannounce( tr_info_t * inf, benc_val_t * meta )
|
|
{
|
|
benc_val_t * val, * subval, * urlval;
|
|
char * address, * announce;
|
|
int ii, jj, port, random;
|
|
tr_tracker_info_t * sublist;
|
|
int subcount;
|
|
void * swapping;
|
|
|
|
/* Announce-list */
|
|
val = tr_bencDictFind( meta, "announce-list" );
|
|
if( NULL != val && TYPE_LIST == val->type && 0 < val->val.l.count )
|
|
{
|
|
inf->trackerTiers = 0;
|
|
inf->trackerList = calloc( sizeof( inf->trackerList[0] ),
|
|
val->val.l.count );
|
|
|
|
/* iterate through the announce-list's tiers */
|
|
for( ii = 0; ii < val->val.l.count; ii++ )
|
|
{
|
|
subval = &val->val.l.vals[ii];
|
|
if( TYPE_LIST != subval->type || 0 >= subval->val.l.count )
|
|
{
|
|
continue;
|
|
}
|
|
subcount = 0;
|
|
sublist = calloc( sizeof( sublist[0] ), subval->val.l.count );
|
|
|
|
/* iterate through the tier's items */
|
|
for( jj = 0; jj < subval->val.l.count; jj++ )
|
|
{
|
|
urlval = &subval->val.l.vals[jj];
|
|
if( TYPE_STR != urlval->type ||
|
|
tr_httpParseUrl( urlval->val.s.s, urlval->val.s.i,
|
|
&address, &port, &announce ) )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
/* place the item info in a random location in the sublist */
|
|
random = tr_rand( subcount + 1 );
|
|
if( random != subcount )
|
|
{
|
|
sublist[subcount] = sublist[random];
|
|
}
|
|
sublist[random].address = address;
|
|
sublist[random].port = port;
|
|
sublist[random].announce = announce;
|
|
subcount++;
|
|
}
|
|
|
|
/* just use sublist as is if it's full */
|
|
if( subcount == subval->val.l.count )
|
|
{
|
|
inf->trackerList[inf->trackerTiers].list = sublist;
|
|
inf->trackerList[inf->trackerTiers].count = subcount;
|
|
inf->trackerTiers++;
|
|
}
|
|
/* if we skipped some of the tier's items then trim the sublist */
|
|
else if( 0 < subcount )
|
|
{
|
|
inf->trackerList[inf->trackerTiers].list = calloc( sizeof( sublist[0] ), subcount );
|
|
memcpy( inf->trackerList[inf->trackerTiers].list, sublist,
|
|
sizeof( sublist[0] ) * subcount );
|
|
inf->trackerList[inf->trackerTiers].count = subcount;
|
|
inf->trackerTiers++;
|
|
free( sublist );
|
|
}
|
|
/* drop the whole sublist if we didn't use any items at all */
|
|
else
|
|
{
|
|
free( sublist );
|
|
}
|
|
}
|
|
|
|
/* did we use any of the tiers? */
|
|
if( 0 == inf->trackerTiers )
|
|
{
|
|
tr_inf( "No valid entries in \"announce-list\"" );
|
|
free( inf->trackerList );
|
|
inf->trackerList = NULL;
|
|
}
|
|
/* trim unused sublist pointers */
|
|
else if( inf->trackerTiers < val->val.l.count )
|
|
{
|
|
swapping = inf->trackerList;
|
|
inf->trackerList = calloc( sizeof( inf->trackerList[0] ),
|
|
inf->trackerTiers );
|
|
memcpy( inf->trackerList, swapping,
|
|
sizeof( inf->trackerList[0] ) * inf->trackerTiers );
|
|
free( swapping );
|
|
}
|
|
}
|
|
|
|
/* Regular announce value */
|
|
if( 0 == inf->trackerTiers )
|
|
{
|
|
val = tr_bencDictFind( meta, "announce" );
|
|
if( NULL == val || TYPE_STR != val->type )
|
|
{
|
|
tr_err( "No \"announce\" entry" );
|
|
return 1;
|
|
}
|
|
|
|
if( tr_httpParseUrl( val->val.s.s, val->val.s.i,
|
|
&address, &port, &announce ) )
|
|
{
|
|
tr_err( "Invalid announce URL (%s)", val->val.s.s );
|
|
return 1;
|
|
}
|
|
|
|
sublist = calloc( sizeof( sublist[0] ), 1 );
|
|
sublist[0].address = address;
|
|
sublist[0].port = port;
|
|
sublist[0].announce = announce;
|
|
inf->trackerList = calloc( sizeof( inf->trackerList[0] ), 1 );
|
|
inf->trackerList[0].list = sublist;
|
|
inf->trackerList[0].count = 1;
|
|
inf->trackerTiers = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void tr_metainfoRemoveSaved( const char * hashString )
|
|
{
|
|
char file[MAX_PATH_LENGTH];
|
|
|
|
snprintf( file, MAX_PATH_LENGTH, "%s/%s",
|
|
tr_getTorrentsDirectory(), hashString );
|
|
unlink(file);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* strcatUTF8
|
|
***********************************************************************
|
|
* According to the official specification, all strings in the torrent
|
|
* file are supposed to be UTF-8 encoded. However, there are
|
|
* non-compliant torrents around... If we encounter an invalid UTF-8
|
|
* character, we assume it is ISO 8859-1 and convert it to UTF-8.
|
|
**********************************************************************/
|
|
#define WANTBYTES( want, got ) \
|
|
if( (want) > (got) ) { return; } else { (got) -= (want); }
|
|
static void _strcatUTF8( char * s, int len, char * append )
|
|
{
|
|
char * p;
|
|
|
|
/* Go to the end of the destination string */
|
|
while( s[0] )
|
|
{
|
|
s++;
|
|
len--;
|
|
}
|
|
|
|
/* Now start appending, converting on the fly if necessary */
|
|
for( p = append; p[0]; )
|
|
{
|
|
if( !( p[0] & 0x80 ) )
|
|
{
|
|
/* ASCII character */
|
|
WANTBYTES( 1, len );
|
|
*(s++) = *(p++);
|
|
continue;
|
|
}
|
|
|
|
if( ( p[0] & 0xE0 ) == 0xC0 && ( p[1] & 0xC0 ) == 0x80 )
|
|
{
|
|
/* 2-bytes UTF-8 character */
|
|
WANTBYTES( 2, len );
|
|
*(s++) = *(p++); *(s++) = *(p++);
|
|
continue;
|
|
}
|
|
|
|
if( ( p[0] & 0xF0 ) == 0xE0 && ( p[1] & 0xC0 ) == 0x80 &&
|
|
( p[2] & 0xC0 ) == 0x80 )
|
|
{
|
|
/* 3-bytes UTF-8 character */
|
|
WANTBYTES( 3, len );
|
|
*(s++) = *(p++); *(s++) = *(p++);
|
|
*(s++) = *(p++);
|
|
continue;
|
|
}
|
|
|
|
if( ( p[0] & 0xF8 ) == 0xF0 && ( p[1] & 0xC0 ) == 0x80 &&
|
|
( p[2] & 0xC0 ) == 0x80 && ( p[3] & 0xC0 ) == 0x80 )
|
|
{
|
|
/* 4-bytes UTF-8 character */
|
|
WANTBYTES( 4, len );
|
|
*(s++) = *(p++); *(s++) = *(p++);
|
|
*(s++) = *(p++); *(s++) = *(p++);
|
|
continue;
|
|
}
|
|
|
|
/* ISO 8859-1 -> UTF-8 conversion */
|
|
WANTBYTES( 2, len );
|
|
*(s++) = 0xC0 | ( ( *p & 0xFF ) >> 6 );
|
|
*(s++) = 0x80 | ( *(p++) & 0x3F );
|
|
}
|
|
}
|