Source Port

A source port is a software project based on the source code of a computer game's engine that allows the game to be played on operating systems or computing platforms with which the game was not originally compatible. Source ports are created by fans after the original developer hands over the maintenance support for a game by releasing its source code to the public. The term was coined after the release of the source code to Doom. Due to copyright issues concerning the sound library used by original DOS version, id Software released only the source code to the Linux version of the game. Since the majority of Doom players were DOS users the first step for a fan project was to port the Linux source code to DOS. A legitimate source port includes only the engine portion of the game and require that the data files of the game in question already be present on users' systems. Source ports are in no way meant to encourage copyright infringement of software.

Source ports do not change the original gameplay as such projects are by definition mods. However many source ports add support for gameplay mods, which is usually optional (e.g. DarkPlaces consists of a source port engine and a gameplay mod that are even distributed separately). While the primary goal of any source port is compatibility with newer hardware, many projects support other enhancements. Common examples of additions include support for higher video resolutions and different aspect ratios, hardware accelerated renderers (OpenGL and/or Direct3D), enhanced input support (including the ability to map controls onto additional input devices), 3D character models (in case of 2.5D games), higher resolution textures, support to replace MIDI with digital audio (MP3, Ogg Vorbis, etc.), and enhanced multiplayer support using the Internet.

Several source ports have been created for various games specifically to address online multiplayer support. Most older games were not created to take advantage of the Internet and the low latency, high bandwidth Internet connections available to computer gamers today. Furthermore, old games may use outdated network protocols to create multiplayer connections, such as IPX protocol, instead of Internet Protocol. Another problem was games that required a specific IP address for connecting with another player. This requirement made it difficult to quickly find a group of strangers to play with — the way that online games are most commonly played today. To address this shortcoming, specific source ports such as Skulltag added "lobbies", which are basically integrated chat rooms in which players can meet and post the location of games they are hosting or may wish to join. Similar facilities may be found in newer games and online game services such as Valve's Steam, Blizzard's battle.net, and Gamespy Arcade.

Read more about Source Port:  List of Source Ports

Other articles related to "source port, source, port, ports, source ports":

List of Source Ports
... Arx Libertatis Call to Power II Apolyton Civilization Site Call to Power II Source Code Project Descent DXX-Rebirth Descent II DXX-Rebirth D2X-XL Doom/Doom II See Doom source port for a detailed list ... Duke Nukem 3D EDuke32 icculus.org/duke3d JFDuke3D Rancidmeat Port xDuke Port FreeSpace 2 FreeSpace 2 Source Code Project icculus.org/freespace2 Heretic ZDoom Doomsday ...
Network Address Translation - Implementation - Translation of The Endpoint
... sent to external hosts actually contain the external IP address and port information of the NAT device instead of internal host IPs or port numbers ... sends a packet to the external network, the NAT device replaces the internal IP address in the source field of the packet header (sender's address) with ... PAT may then assign the connection a port number from a pool of available ports, inserting this port number in the source port field (much like the post office box number ...
Network Address Translation - Implementation - Establishing Two-Way Communication
... Every TCP and UDP packet contains both a source IP address and source port number as well as a destination IP address and destination port number ... The port address/IP address pair forms a socket ... In particular, the source port and source IP address form the source socket ...
DNS Spoofing - Prevention and Mitigation
... As stated above, source port randomization for DNS requests, combined with the use of cryptographically-secure random numbers for selecting both the source port and the 16-bit cryptographic nonce ... other gateway devices that perform network address translation (NAT), or more specifically, port address translation (PAT), often rewrite source ports in order to track connection ... When modifying source ports, PAT devices typically remove source port randomness implemented by nameservers and stub resolvers ...

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