_ _ __ _ _ _ _ _ _ _ _| | |___ ___ / _| |_ __| |_ ___ _ _| |_ __ __ _ __| |_ | ' \ || | | (_- SHOUTcast DNAS. Click on Edit Config in the menu bar, and a text editor will appear with the configuration file for the SHOUTcast server. When finished, save your changes, and kill the GUI server. You have to restart the DNAS for changes to take effect. Unix: Edit the sc_serv.conf file in the text editor of your choice. Tom would prefer you use Emacs, because it makes Justin really mad. Justin would prefer you use vi, because he thinks Tom suffers from some vicious malaise. You'll probably be lame and end up using Pico. There's additional documentation available on the parameters on shoutcast.com in the documentation section. Running / Shutdown: WINDOWS: The SHOUTcast DNAS installer creates shortcuts under Start Menu -> Programs -> SHOUTcast DNAS to launch either the console or GUI version of the DNAS. To launch via command line, cd to the directory the DNAS is installed in, and run sc_serv_cons.exe sc_serv.ini. To shutdown, click Kill Server in the GUI version, or press Ctrl-C on the keyboard in the console version. UNIX: Under Unix, cd to the directory where you unpacked the SHOUTcast server, and type ./sc_serv to start the server. You can start the server in the background by entering ./sc_serv &. If you want to stop the server, send a TERM or INT signal by issuing a ctrl-C if the server is in the foreground, or a kill -TERM if the server is running in the background. Signals support is included on UNIX. Issuing a SIGHUP (kill -HUP) will force the DNAS to close and re-open the logfiles (useful for logfile rotation.) Also, SIGWINCH (kill -WINCH) will reload the following config file items (and, specifically, NOT items which aren't listed here) and start again: "Password" "LogFile" "RelayServer" "RelayPort" "PublicServer" "RealTime" "ScreenLog" "IntroFile" "AutoDumpUsers" "DestIP" "SrcIP" "AutoDumpSourceTime" "BackupFile" "Yport" "BanFile" "RipFile" "AdminPassword" "AllowRelay" "AllowPublicRelay" "ListenerTimer" "WebLog" "TchLog" "Sleep" "Unique" "ContentDir" "W3CLog" "W3CEnable" "CleanXML" "RIPOnly" If you intend on broadcasting to more than 64 listeners, you may also want to look into unlimiting the descriptors allocated to your shell. The commands limit, ulimit, and unlimit may be of some assistance to you. Tech Notes / How it Works: As of SHOUTcast 1.6.0, there are two modes of operation. The DNAS's primary function is as a live-broadcast repeater. It receives data from a broadcaster, notifies the SHOUTcast directory when requested to by the client, and repeats the broadcast audio data from the source to the listeners. It attempts to do this rather efficiently. The second mode of operation is on-demand content streaming. If you place .MP3 files in the content directory, SHOUTcast will send these streams to listeners along with a small amount of protection keeping them from being able to save the stream as it comes in (unlike web servers). An example of on-demand streaming and how it works: Assuming you've installed the DNAS in /usr/local/shoutcast, and have copied a valid MP3 file named music.mp3 into /usr/local/shoutcast/content, you would place a URL link on a web page as follows: Music Now, although there is no file called music.pls in the content directory, when a WEB BROWSER (NOT WINAMP) connects to the DNAS and requests music.pls, the DNAS will check to make sure a file called music.mp3 exists in the content directory, and if so, auto-generate a playlist for the browser to hand off to the player for streaming. The server runs under many operating systems. It's a threaded, multi-processor aware application. Memory use is static (meaning it won't change over time), and dependent upon the number of listeners configured. CPU usage of the DNAS is very low -- we've broadcasted 24kbps on a single 300mhz processor to over 600 listeners. The DNAS server runs (as of this release) on Windows Server 2003, XP, 2000, Windows NT 4/3, Windows 98, Windows 95, FreeBSD, Linux (glibc), MacOS X, and Sparc Solaris. Remote Administration: Remote administration is handled by connecting to the server with a web browser. Point your browser to http://your.servers.ip.address:port/ and log in with the admin password you have specified in the config file. XML Statistics: The SHOUTcast DNAS provides an internal mechanism for providing statistics to external applications via XML, which is useful for providing live information on your DNAS embedded in other webpages via PHP, Perl, or other methods which can implement XML. Accessing this data is a bit tricky, so it's briefly explained here: XML pages should be called via: http://yourip:port/admin.cgi?pass=yourpass&mode=viewxml&page=0 http://yourip:port/admin.cgi?pass=yourpass&mode=viewxml&page=1 ... Where: Page 0 is all DNAS data Page 1 is only Main data Page 2 is only Webdata Table Page 3 is only Listener Table Page 4 is only Songhistory Table Your XML parser MUST send a User-Agent: HTTP header containing the word "Mozilla" in order for the DNAS to recognize it as something other than a listener. A sample PHP script for getting XML data from a SHOUTcast DNAS is available at http://beta.shoutcast.com/~tpepper/grabxml.phps. It should be fairly painless to induce what should be done differently for other implementations of middleware. Quick Statistics: To snag a quick list of listener counts, server state, bitrate, and current title, use the URL http://yourip:port/7.html How to Choose Your Maximum Listeners Value: All listeners are only able to listen at what their connections can support. For most users on the net, when you consider modem/PPP overhead, internet congestion, and the fact that most modems out there are around 33.6kbps, it makes sense to use 24kbps for most public streaming. Even though, theoretically, 33.6 users should be able to listen at 32kbps, with overhead it becomes impossible. Anyone with a 56k modem sending to an upstream server is affected by the asymmetric nature of 56k modems. That is, the fastest a 56k modem can download data as fast as 53kbps, the upload data is at most 31.2kbps. Sorry, no 56 or 32kbps streams are servable over a 56k modem. You cannot serve more users that you have available bandwidth. If you're running the SHOUTcast server over a modem link at any speed, the most you can muster is one user at 24 or 32kbps. Attempting to serve more users than you have bandwidth only causes skippage. Shell sysadmins will be *very* unhappy if you consume their available bandwidth and server CPU without their consent. SHOUTcast is a highly demanding program of bandwidth. A T1 line can only theoretically support about 60 listeners if no other traffic is on that T1. Additionally, each listener takes up a thread on the server operating system, which can slow some operating systems if allowed to expand beyond the limits of the system. If you throw up a SHOUTcast server unbeknownst to the sysadmin with 50+ maximum users, you had better be prepared to face the consequences of your actions. As a fellow sysadmin, I offer this to you as your ONLY WARNING. Pick a smart number of maxusers for your server. Calculate by taking the available bandwidth you have, multiplying by 0.9 to account for overhead, and dividing by the bitrate you want to serve at. For example, an ADSL connection @ 768kbps upstream * 0.9 / 24kbps ~= 29 maximum users. Again, set this number too high, and when you reach the limit of bandwidth ALL the streams will start to skip. License: SHOUTCAST SERVER(TM) SHOUTCAST(TM), all versions, are copyright protected and are the property of Nullsoft, Inc. Until further notice, this software may be used for personal or commercial purposes for free and need not be registered with Nullsoft, Inc., or its parent company, America Online, Inc. SHOUTCAST(TM) may not be copied, sold, distributed or used in any other manner without the express written consent of Nullsoft, Inc. To the maximum extent permitted by law, Nullsoft, Inc. disclaims all warranties regarding this software, express or implied, including but not limited to warranties of merchantability and fitness for a particular purpose. In no event shall Nullsoft, Inc. be liable for consequential, special, incidental or indirect damages arising out of the use or inability to use this software even if Nullsoft, Inc. is aware of the possibility of such damages or a known defect. By using this software, you are agreeing to the above terms. Additional Terms of Use information is available at: http://www.shoutcast.com/disclaimer.phtml Version History: v1.9.5 (December 27, 2004) * bugfixes - fixed "/content/" exploit v1.9.4 (March 17, 2004) * bugfixes - fixed buffer overrun vulnerability for users who knew DJ / Admin Password - fixed icq/irc/aim parsing so yp handles spaces in the field - fixed listen playlist generator to handle video sources correctly - servers can now relay NSV video content from one another v1.9.2 (November 25, 2002) * new features - sc_serv now recognizes content-types other than Audio/MPEG. We've been sending it all sorts of things. Rudimentary, DNAS 3.x will be the real launch vehicle for different media types. - Development support for authentication servers. Using auth will preclude you being able to use the SHOUTcast directory, since listeners need authorization to listen to your server. Ask in the mailing list for information on testing this new undocumented featureset. - Since bugtraq apparently feels unix admins aren't capable of demonstrating enough self-control to mark their logfiles as private, the server no longer logs the correct password alongside the submitted password on a failed broadcaster connect. * new bugfixes - Fixed overflow exploit where if no broadcast was currently active on the server and attacker knew the broadcast password to the server, the server could be coredumped. v1.8.9 (March 15, 2002) * new features - w3c logfile support. w3c logfiles allow providers to use tools like analog and webtrends to track their station statistics. it also permits companies like Arbitron and Measurecast to officially track your station metrics. - DNAS can now run in reserved-IP only mode. This means both that your server will only accept connections from Reserved IP addresses, and also that it will force this server into private-only mode. Servers in reserved-IP mode will not be listed on the SHOUTcast directory, but are still compatible when using downstream public relay servers to cluster. - XML can be changed with a conf line item to remove linefeeds and spacing which confuses some XML parsers (i.e. Flash). The default leaves it in "pretty" mode. - Public servers now provide cumulative metrics back to the SHOUTcast directory. These values are used to make the statistics on SHOUTcast (i.e. http://shoutcast.com/ttsl.html) more accurate. - XML now contains two new listener items, POINTER and UID, for ShoutClub's tools - XML now contains STREAMSTATUS for noting active source connection - New HTTP pages, title or title.html and listen.m3u - Streamrippers are now denied connections * new config items - W3CLog -- Use this item to define the name of the file for w3c logfiles. - W3CEnable -- Use this item to turn W3C logging on or off. - CleanXML -- Use this item to strip linefeeds and spacing from XML files. - RIPOnly -- Use this item to only allow IP addresses in the Reserved IP list to connect/relay. Setting this item to yes forces this server to not list in the SHOUTcast directory (PublicServer=never) * bugfixes - Fixed sc_serv.ini so Content dir doesn't have trailing slash (fixes on-demand serving) - Average Listening Time no longer includes relay connections v1.8.8 (January 16, 2002) * internal release only v1.8.7 (December 12, 2001) * internal release only v1.8.6 (November 2, 2001) * internal release only v1.8.5 (October 18, 2001) * internal release only v1.8.4 (September 15, 2001) * internal release only v1.8.3 (August 7, 2001) * bugfixes - Fixed buffer overrun issue on nasty implementations of vsprintf() on some OS's - Fixed buffer overrun issue with XML Page generator, when under a DoS Attack. - Fixed buffer overrun issue with GUI logging function when under a DoS Attack. v1.8.2 (July 23, 2001) * new features (trying to remember...) - Automatic full server redirection for clusters - On-demand content can now be from any specified directory - On-demand content now supports subdirectories * new config items - ContentDir -- Allows you to specify the source directory for on-demand streams * bugfixes - Fixed rare bug where losing DNS of yp server caused multiple-day loss of contact to yp - XML header change (more compatible. yay.) - uh, some other stuff we did in february that I don't remember. v1.8.0 (January 4, 2001) * new features - internal buffer size now 1 meg -- better resiliency for bad connections - initial buffer fill size now larger -- no waits for fast connects - far better international language support - new web logs now approved for Arbitron ratings - buffer position now tracked in admin page (entries that are always at zero are recording or relaying your stream. should nominally sit around 128,000) - Solaris build now even more optimized, we've pushed 500Mbps on one box with this build. - Title updates should now be much more closely synchronized with the change in the audio stream. * new config items (none) * bugfixes - Windows sleep granularity fixed. No more skipping on high bitrate streams. Sorry. - XML and HTML pages now correctly encode high-byte characters. You need to upgrade to DSP 1.8.0 for international titling to work correctly. - Good tweaks in good places, smarter net delivery, smarter buffering. v1.7.1 (August 29, 2000) * new features (none) * new config items - Unique -- Allows variable substitution in mass configuration setups - Include -- Reads additional configuration file * bugfixes - Average Listener Time now calculated only for listeners connected longer than one minute, and includes current listeners in calculated value - Average Listener Time no longer returns negative values on very short connects - Windows version no longer experiences heavy skipping (1.7.0 bug) - Fixed rare condition where "zombie" listeners took up listener slots v1.7.0 (August 14, 2000) * new features - New XML pages for subsets of shoutcast statistics data. See XML section. - Average Listener Time now listed on status page - New logging system tracks individual listener events, and assigns unique ID for every connected socket for easier tracking. - DNAS should now be MUCH more optimized for high-bandwidth delivery (listener impact on CPU is now linear instead of geometric) * new config items - WebLog (Yes/No, default No) - display http:// requests in log - TchLog (Yes/No, default Yes) - display yp touches - Sleep (value) - tweakable parameter for high-traffic SHOUTcast servers -- adjusts sleep granularity. - CpuCount (value) - tweakable parameter for high-traffic SHOUTcast servers -- adjusts client threads. * bugfixes - All non-ASCII characters are now properly encoded for XML - YP now receives average listener time data (for ratings) v1.666.1 (June 12 2000) * bug fixes - Occasional CPU full load issue at idle, and during client connections (a thread-safe sleep() would sure be nice. way to track it down, tag.) v1.666.0 (June 6 2000) * new features - ListenerTimer config item will force-disconnect listeners active for the number of minutes specified - AllowRelay config item will permit or deny other servers from relaying - AllowPublicRelay config item allows relaying, but forces relays to treat server as non-public - Ban / Reserve IP lists now available to add on-the-fly - Initial stream backpositioning set at 32k (faster sync-up for listeners with faster connections) - Taillog via HTML admin now available regardless of disk logging setting * bugfixes - XML now displays appropriately URL-encoded data for all wacky characters - Linux SIGSEGV errors fixed. No, really, I mean it. - Taillog now handled internally via circular buffer because Linux pukes when more than one thread is accessing a file a lot - Relay lock fixed - On-demand content delivery fixed for Linux v1.6.0rc2 (May 16 2000) * new features - Reported listener count only tracks unique IPs (cuts down on fake entries) - Upon NAK from yp, server will now attempt to speak to yp again on a source disconnect/reconnect, instead of total server restart * bugfixes - SPARC solaris sleep isn't thread-safe, fixed - Fixed bug where servers occasionally locked in listener thread and listener count skyrocketed - Fixed Linux web-admin SIGSEGV bug - Fixed taillog SIGSEGV bug v1.6.0b1 (Feb 16 2000) * new features: - XML status page [http://server:port/admin.cgi?pass=(passwd)&mode=viewxml] - on-demand content serving (prevents save-to-disk in Winamp, etc.) example included: [http://server:port/content/scpromo.mp3] (open in Winamp) - on-demand content playlist generator (for direct URL linking) example included: [http://server:port/content/scpromo.pls] (open in IE) * bugfixes: - yp bug where losing connection with yp would leave server out of directory until sc_serv restart - fixed obscure bug in client thread which would occasionally freeze clients v1.5.0 (Jan 20 2000) - Complete rewrite of source - Now 4 thread model instead of n+3, much more efficient - Fixed annoying year 2000 log display anomaly (thank you tm struct) - Code no longer leaky on any supported OS to best of our knowledge - No more wierd signals sneaking in and killing sc_serv on Solaris - Addition of IRC, AIM, and ICQ flags for directory - Addition of Bans via web interface -- kick and ban the bastards - Addition of Reserved connects -- always permit connects by IP - Low-bandwidth status report for Palm VII (http://server/7.html) - New hyperleet web interface (thanks for the help Steve) - Last n songs integrated into web interface (1-20) - Admin and Broadcast passwords can optionally be different (hello live365) - Listener list (http) now sorted by connect time - (fixed 1.3.0b1 gui display bug, taillog now persistent) - removal of usage graph (it was crappy) - removal of telnet log interface (use http, please) - Top secret credits page (happy hunting) - Tom has new kick-ass girlfriend (Nullsoft is in bloom) - Tag now highly eligible bachelor