mirror of
https://github.com/transmission/transmission
synced 2024-12-24 08:43:27 +00:00
517 lines
16 KiB
C
517 lines
16 KiB
C
/*
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* This file Copyright (C) 2008 Charles Kerr <charles@rebelbase.com>
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2(b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h> /* printf */
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#include <stdlib.h> /* exit, atoi */
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#include <string.h> /* strcmp */
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#include <fcntl.h> /* open */
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#include <signal.h>
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#include <unistd.h> /* daemon */
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#include <libtransmission/transmission.h>
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#include <libtransmission/bencode.h>
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#include <libtransmission/rpcimpl.h>
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#include <libtransmission/tr-getopt.h>
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#include <libtransmission/utils.h>
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#include <libtransmission/version.h>
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#define MY_NAME "transmission-daemon"
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static int closing = FALSE;
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static tr_session * mySession = NULL;
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static char * myConfigFilename = NULL;
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#define KEY_BLOCKLIST "blocklist-enabled"
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#define KEY_DOWNLOAD_DIR "download-dir"
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#define KEY_ENCRYPTION "encryption"
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#define KEY_LAZY_BITFIELD "lazy-bitfield-enabled"
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#define KEY_PEER_LIMIT "max-peers-global"
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#define KEY_PEER_PORT "peer-port"
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#define KEY_PORT_FORWARDING "port-forwarding-enabled"
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#define KEY_PEX_ENABLED "pex-enabled"
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#define KEY_AUTH_REQUIRED "rpc-authentication-required"
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#define KEY_USERNAME "rpc-username"
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#define KEY_PASSWORD "rpc-password"
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#define KEY_WHITELIST "rpc-whitelist"
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#define KEY_WHITELIST_ENABLED "rpc-whitelist-enabled"
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#define KEY_RPC_PORT "rpc-port"
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#define KEY_DSPEED "download-limit"
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#define KEY_DSPEED_ENABLED "download-limit-enabled"
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#define KEY_USPEED "upload-limit"
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#define KEY_USPEED_ENABLED "upload-limit-enabled"
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#define CONFIG_FILE "settings.json"
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/***
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**** Config File
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***/
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static void
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replaceInt( tr_benc * dict,
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const char * key,
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int64_t value )
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{
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tr_bencDictRemove( dict, key );
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tr_bencDictAddInt( dict, key, value );
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}
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static void
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replaceStr( tr_benc * dict,
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const char * key,
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const char* value )
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{
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tr_bencDictRemove( dict, key );
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tr_bencDictAddStr( dict, key, value );
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}
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static void
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saveState( tr_session * s )
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{
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int i, n = 0;
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char * strs[4];
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tr_benc d;
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if( tr_bencLoadJSONFile( myConfigFilename, &d ) )
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tr_bencInitDict( &d, 16 );
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replaceInt( &d, KEY_BLOCKLIST, tr_blocklistIsEnabled( s ) );
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replaceStr( &d, KEY_DOWNLOAD_DIR, tr_sessionGetDownloadDir( s ) );
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replaceInt( &d, KEY_PEER_LIMIT, tr_sessionGetPeerLimit( s ) );
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replaceInt( &d, KEY_PEER_PORT, tr_sessionGetPeerPort( s ) );
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replaceInt( &d, KEY_PORT_FORWARDING,
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tr_sessionIsPortForwardingEnabled( s ) );
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replaceInt( &d, KEY_PEX_ENABLED, tr_sessionIsPexEnabled( s ) );
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replaceStr( &d, KEY_USERNAME, strs[n++] =
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tr_sessionGetRPCUsername(
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s ) );
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replaceStr( &d, KEY_PASSWORD, strs[n++] =
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tr_sessionGetRPCPassword(
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s ) );
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replaceStr( &d, KEY_WHITELIST, strs[n++] = tr_sessionGetRPCWhitelist( s ) );
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replaceInt( &d, KEY_RPC_PORT, tr_sessionGetRPCPort( s ) );
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replaceInt( &d, KEY_AUTH_REQUIRED, tr_sessionIsRPCPasswordEnabled( s ) );
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replaceInt( &d, KEY_DSPEED,
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tr_sessionGetSpeedLimit( s, TR_DOWN ) );
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replaceInt( &d, KEY_DSPEED_ENABLED,
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tr_sessionIsSpeedLimitEnabled( s, TR_DOWN ) );
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replaceInt( &d, KEY_USPEED, tr_sessionGetSpeedLimit( s, TR_UP ) );
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replaceInt( &d, KEY_USPEED_ENABLED,
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tr_sessionIsSpeedLimitEnabled( s, TR_UP ) );
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replaceInt( &d, KEY_ENCRYPTION, tr_sessionGetEncryption( s ) );
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tr_bencSaveJSONFile( myConfigFilename, &d );
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tr_bencFree( &d );
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tr_ninf( MY_NAME, "saved \"%s\"", myConfigFilename );
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for( i = 0; i < n; ++i )
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tr_free( strs[i] );
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}
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static void
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getConfigInt( tr_benc * dict,
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const char * key,
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int * setme,
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int defaultVal )
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{
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if( *setme < 0 )
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{
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int64_t i;
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if( tr_bencDictFindInt( dict, key, &i ) )
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*setme = i;
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else
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*setme = defaultVal;
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}
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}
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static void
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getConfigStr( tr_benc * dict,
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const char * key,
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const char ** setme,
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const char * defaultVal )
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{
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if( !*setme )
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{
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const char * s;
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if( tr_bencDictFindStr( dict, key, &s ) )
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*setme = s;
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else
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*setme = defaultVal;
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}
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}
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/**
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* @param port port number, or -1 if not set in the command line
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* @param auth TRUE, FALSE, or -1 if not set on the command line
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* @param blocklist TRUE, FALSE, or -1 if not set on the command line
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*/
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static void
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session_init( const char * configDir,
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const char * downloadDir,
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int rpcPort,
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const char * whitelist,
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int authRequired,
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const char * username,
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const char * password,
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int blocklistEnabled )
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{
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char * mycwd;
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tr_benc state, *dict = NULL;
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int peerPort = -1, peers = -1;
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int whitelistEnabled = -1;
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int pexEnabled = -1;
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int fwdEnabled = -1;
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int upLimit = -1, upLimited = -1, downLimit = -1,
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downLimited = -1;
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int encryption = -1;
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int useLazyBitfield = -1;
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tr_ctor * ctor;
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tr_torrent ** torrents;
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if( !tr_bencLoadJSONFile( myConfigFilename, &state ) )
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dict = &state;
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/***
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**** Decide on which values to pass into tr_sessionInitFull().
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**** The command-line arguments are given precedence and
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**** the state file from the previous session is used as a fallback.
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**** If neither of those can be found, the TR_DEFAULT fields are used .
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***/
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mycwd = tr_getcwd( );
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getConfigStr( dict, KEY_DOWNLOAD_DIR, &downloadDir, mycwd );
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getConfigInt( dict, KEY_PEX_ENABLED, &pexEnabled,
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TR_DEFAULT_PEX_ENABLED );
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getConfigInt( dict, KEY_PORT_FORWARDING, &fwdEnabled,
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TR_DEFAULT_PORT_FORWARDING_ENABLED );
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getConfigInt( dict, KEY_PEER_PORT, &peerPort,
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TR_DEFAULT_PORT );
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getConfigInt( dict, KEY_DSPEED, &downLimit, 100 );
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getConfigInt( dict, KEY_DSPEED_ENABLED, &downLimited, FALSE );
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getConfigInt( dict, KEY_USPEED, &upLimit, 100 );
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getConfigInt( dict, KEY_USPEED_ENABLED, &upLimited, FALSE );
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getConfigInt( dict, KEY_LAZY_BITFIELD, &useLazyBitfield,
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TR_DEFAULT_LAZY_BITFIELD_ENABLED );
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getConfigInt( dict, KEY_PEER_LIMIT, &peers,
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TR_DEFAULT_GLOBAL_PEER_LIMIT );
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getConfigInt( dict, KEY_BLOCKLIST, &blocklistEnabled,
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TR_DEFAULT_BLOCKLIST_ENABLED );
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getConfigInt( dict, KEY_RPC_PORT, &rpcPort,
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TR_DEFAULT_RPC_PORT );
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getConfigInt( dict, KEY_WHITELIST_ENABLED, &whitelistEnabled,
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TR_DEFAULT_RPC_WHITELIST_ENABLED );
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getConfigStr( dict, KEY_WHITELIST, &whitelist,
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TR_DEFAULT_RPC_WHITELIST );
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getConfigInt( dict, KEY_AUTH_REQUIRED, &authRequired, FALSE );
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getConfigStr( dict, KEY_USERNAME, &username, NULL );
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getConfigStr( dict, KEY_PASSWORD, &password, NULL );
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getConfigInt( dict, KEY_ENCRYPTION, &encryption,
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TR_DEFAULT_ENCRYPTION );
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/***
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****
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***/
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/* start the session */
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mySession = tr_sessionInitFull( configDir, "daemon", downloadDir,
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pexEnabled, fwdEnabled, peerPort,
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encryption,
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useLazyBitfield,
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upLimited, upLimit,
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downLimited, downLimit,
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peers,
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TR_MSG_INF, 0,
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blocklistEnabled,
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TR_DEFAULT_PEER_SOCKET_TOS,
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TRUE, rpcPort,
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whitelistEnabled, whitelist,
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authRequired, username, password,
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TR_DEFAULT_PROXY_ENABLED,
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TR_DEFAULT_PROXY,
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TR_DEFAULT_PROXY_PORT,
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TR_DEFAULT_PROXY_TYPE,
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TR_DEFAULT_PROXY_AUTH_ENABLED,
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TR_DEFAULT_PROXY_USERNAME,
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TR_DEFAULT_PROXY_PASSWORD );
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if( authRequired )
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tr_ninf( MY_NAME, "requiring authentication" );
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/* load the torrents */
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ctor = tr_ctorNew( mySession );
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torrents = tr_sessionLoadTorrents( mySession, ctor, NULL );
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tr_free( torrents );
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tr_ctorFree( ctor );
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if( dict )
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tr_bencFree( &state );
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tr_free( mycwd );
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}
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static const char *
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getUsage( void )
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{
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return "Transmission " LONG_VERSION_STRING
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" http://www.transmissionbt.com/\n"
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"A fast and easy BitTorrent client\n"
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"\n"
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MY_NAME " is a headless Transmission session\n"
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"that can be controlled via transmission-remote or Clutch.\n"
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"\n"
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"Usage: " MY_NAME " [options]";
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}
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static const struct tr_option options[] =
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{
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{ 'a', "allowed",
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"Allowed IP addresses. (Default: " TR_DEFAULT_RPC_WHITELIST ")", "a",
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1, "<list>" },
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{ 'b', "blocklist", "Enable peer blocklists",
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"b", 0, NULL },
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{ 'B', "no-blocklist", "Disable peer blocklists",
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"B", 0, NULL },
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{ 'f', "foreground", "Run in the foreground instead of daemonizing",
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"f", 0, NULL },
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{ 'g', "config-dir", "Where to look for configuration files",
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"g", 1, "<path>" },
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{ 'p', "port",
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"RPC port (Default: " TR_DEFAULT_RPC_PORT_STR ")", "p",
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1, "<port>" },
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{ 't', "auth", "Require authentication",
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"t", 0, NULL },
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{ 'T', "no-auth", "Don't require authentication",
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"T", 0, NULL },
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{ 'u', "username", "Set username for authentication",
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"u", 1, "<username>" },
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{ 'v', "password", "Set password for authentication",
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"v", 1, "<password>" },
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{ 'w', "download-dir", "Where to save downloaded data",
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"w", 1, "<path>" },
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{ 0, NULL, NULL,
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NULL, 0, NULL }
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};
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static void
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showUsage( void )
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{
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tr_getopt_usage( MY_NAME, getUsage( ), options );
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exit( 0 );
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}
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static void
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readargs( int argc,
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const char ** argv,
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int * nofork,
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const char ** configDir,
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const char ** downloadDir,
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int * rpcPort,
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const char ** whitelist,
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int * authRequired,
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const char ** username,
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const char ** password,
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int * blocklistEnabled )
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{
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int c;
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const char * optarg;
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while( ( c = tr_getopt( getUsage( ), argc, argv, options, &optarg ) ) )
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{
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switch( c )
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{
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case 'a':
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*whitelist = optarg; break;
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case 'b':
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*blocklistEnabled = 1; break;
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case 'B':
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*blocklistEnabled = 0; break;
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case 'f':
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*nofork = 1; break;
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case 'g':
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*configDir = optarg; break;
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case 'p':
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*rpcPort = atoi( optarg ); break;
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case 't':
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*authRequired = TRUE; break;
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case 'T':
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*authRequired = FALSE; break;
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case 'u':
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*username = optarg; break;
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case 'v':
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*password = optarg; break;
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case 'w':
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*downloadDir = optarg; break;
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default:
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showUsage( ); break;
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}
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}
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}
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static void
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gotsig( int sig UNUSED )
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{
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closing = TRUE;
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}
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#if !defined( WIN32 )
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#if !defined( HAVE_DAEMON )
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static int
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daemon( int nochdir,
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int noclose )
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{
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switch( fork( ) )
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{
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case 0:
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break;
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case - 1:
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tr_nerr( MY_NAME, "Error daemonizing (fork)! %d - %s", errno,
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strerror(
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errno ) );
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return -1;
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default:
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_exit( 0 );
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}
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if( setsid( ) < 0 )
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{
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tr_nerr( MY_NAME, "Error daemonizing (setsid)! %d - %s", errno,
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strerror(
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errno ) );
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return -1;
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}
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switch( fork( ) )
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{
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case 0:
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break;
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case - 1:
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tr_nerr( MY_NAME, "Error daemonizing (fork2)! %d - %s", errno,
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strerror(
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errno ) );
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return -1;
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default:
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_exit( 0 );
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}
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if( !nochdir && 0 > chdir( "/" ) )
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{
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tr_nerr( MY_NAME, "Error daemonizing (chdir)! %d - %s", errno,
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strerror(
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errno ) );
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return -1;
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}
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if( !noclose )
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{
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int fd;
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if( ( ( fd = open( "/dev/null", O_RDONLY ) ) ) != 0 )
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{
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dup2( fd, 0 );
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close( fd );
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}
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if( ( ( fd = open( "/dev/null", O_WRONLY ) ) ) != 1 )
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{
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dup2( fd, 1 );
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close( fd );
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}
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if( ( ( fd = open( "/dev/null", O_WRONLY ) ) ) != 2 )
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{
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dup2( fd, 2 );
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close( fd );
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}
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}
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return 0;
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}
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#endif
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#endif
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int
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main( int argc,
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char ** argv )
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{
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int nofork = 0;
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int rpcPort = -1;
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int authRequired = -1;
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int blocklistEnabled = -1;
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char * freeme = NULL;
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const char * configDir = NULL;
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const char * downloadDir = NULL;
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const char * whitelist = NULL;
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const char * username = NULL;
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const char * password = NULL;
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signal( SIGINT, gotsig );
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signal( SIGTERM, gotsig );
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#ifndef WIN32
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signal( SIGQUIT, gotsig );
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signal( SIGPIPE, SIG_IGN );
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signal( SIGHUP, SIG_IGN );
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#endif
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readargs( argc, (const char**)argv, &nofork, &configDir, &downloadDir,
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&rpcPort, &whitelist, &authRequired, &username, &password,
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&blocklistEnabled );
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if( configDir == NULL )
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configDir = getenv( "TRANSMISSION_HOME" );
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if( configDir == NULL )
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configDir = freeme = tr_strdup_printf( "%s-daemon",
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tr_getDefaultConfigDir( ) );
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myConfigFilename = tr_buildPath( configDir, CONFIG_FILE, NULL );
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#ifndef WIN32
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if( !nofork )
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{
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if( 0 > daemon( 1, 0 ) )
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{
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fprintf( stderr, "failed to daemonize: %s\n", strerror( errno ) );
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exit( 1 );
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}
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}
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#endif
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session_init( configDir, downloadDir,
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rpcPort, whitelist, authRequired, username, password,
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blocklistEnabled );
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while( !closing )
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tr_wait( 1000 ); /* sleep one second */
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saveState( mySession );
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printf( "Closing transmission session..." );
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tr_sessionClose( mySession );
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printf( " done.\n" );
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tr_free( freeme );
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tr_free( myConfigFilename );
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return 0;
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}
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