Merge branch 'master' into online-player-listonline-player-list

Conflicts:
	src/net/tmwa/chathandler.cpp

1 files changed, 0 insertions, 117 deletions

diff --git a/libs/enet/design.txt b/libs/enet/design.txt
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-* Why ENet?
-
-    ENet evolved specifically as a UDP networking layer for the multiplayer 
-first person shooter Cube. Cube necessitated low latency communcation with
-data sent out very frequently, so TCP was an unsuitable choice due to its
-high latency and stream orientation. UDP, however, lacks many sometimes 
-necessary features from TCP such as reliability, sequencing, unrestricted
-packet sizes, and connection management. So UDP by itself was not suitable
-as a network protocol either. No suitable freely available networking 
-libraries existed at the time of ENet's creation to fill this niche.
-
-    UDP and TCP could have been used together in Cube to benefit somewhat
-from both of their features, however, the resulting combinations of protocols
-still leaves much to be desired. TCP lacks multiple streams of communication
-without resorting to opening many sockets and complicates delineation of 
-packets due to its buffering behavior. UDP lacks sequencing, connection 
-management, management of bandwidth resources, and imposes limitations on
-the size of packets. A significant investment is required to integrate these 
-two protocols, and the end result is worse off in features and performance 
-than the uniform protocol presented by ENet.
-
-    ENet thus attempts to address these issues and provide a single, uniform
-protocol layered over UDP to the developer with the best features of UDP and 
-TCP as well as some useful features neither provide, with a much cleaner 
-integration than any resulting from a mixture of UDP and TCP.
-
-* Connection management
-
-    ENet provides a simple connection interface over which to communicate
-with a foreign host. The liveness of the connection is actively monitored
-by pinging the foreign host at frequent intervals, and also monitors the
-network conditions from the local host to the foreign host such as the
-mean round trip time and packet loss in this fashion.
-
-* Sequencing
-    
-    Rather than a single byte stream that complicates the delineation 
-of packets, ENet presents connections as multiple, properly sequenced packet
-streams that simplify the transfer of various types of data.
-
-    ENet provides sequencing for all packets by assigning to each sent 
-packet a sequence number that is incremented as packets are sent. ENet 
-guarentees that no packet with a higher sequence number will be delivered 
-before a packet with a lower sequence number, thus ensuring packets are 
-delivered exactly in the order they are sent. 
-
-    For unreliable packets, ENet will simply discard the lower sequence 
-number packet if a packet with a higher sequence number has already been 
-delivered. This allows the packets to be dispatched immediately as they
-arrive, and reduce latency of unreliable packets to an absolute minimum.
-For reliable packets, if a higher sequence number packet arrives, but the 
-preceding packets in the sequence have not yet arrived, ENet will stall 
-delivery of the higher sequence number packets until its predecessors
-have arrived.
-
-* Channels
-
-    Since ENet will stall delivery of reliable packets to ensure proper
-sequencing, and consequently any packets of higher sequence number whether 
-reliable or unreliable, in the event the reliable packet's predecessors 
-have not yet arrived, this can introduce latency into the delivery of other 
-packets which may not need to be as strictly ordered with respect to the 
-packet that stalled their delivery.
-
-    To combat this latency and reduce the ordering restrictions on packets,
-ENet provides multiple channels of communication over a given connection.
-Each channel is independently sequenced, and so the delivery status of
-a packet in one channel will not stall the delivery of other packets
-in another channel.
-
-* Reliability
-
-    ENet provides optional reliability of packet delivery by ensuring the 
-foreign host acknowledges receipt of all reliable packets. ENet will attempt 
-to resend the packet up to a reasonable amount of times, if no acknowledgement
-of the packet's receipt happens within a specified timeout. Retry timeouts
-are progressive and become more lenient with every failed attempt to allow
-for temporary turbulence in network conditions.
-
-* Fragmentation and reassembly
-
-    ENet will send and deliver packets regardless of size. Large packets are
-fragmented into many smaller packets of suitable size, and reassembled on
-the foreign host to recover the original packet for delivery. The process
-is entirely transparent to the developer.
-
-* Aggregation
-
-    ENet aggregates all protocol commands, including acknowledgements and
-packet transfer, into larger protocol packets to ensure the proper utilization
-of the connection and to limit the opportunities for packet loss that might
-otherwise result in further delivery latency.
-
-* Adaptability
-
-    ENet provides an in-flight data window for reliable packets to ensure
-connections are not overwhelmed by volumes of packets. It also provides a
-static bandwidth allocation mechanism to ensure the total volume of packets
-sent and received to a host don't exceed the host's capabilities. Further,
-ENet also provides a dynamic throttle that responds to deviations from normal
-network connections to rectify various types of network congestion by further
-limiting the volume of packets sent.
-
-* Portability
-    
-    ENet works on Windows and any other Unix or Unix-like platform providing
-a BSD sockets interface. The library has a small and stable code base that
-can easily be extended to support other platforms and integrates easily.
-
-* Freedom
-
-    ENet demands no royalties and doesn't carry a viral license that would
-restrict you in how you might use it in your programs. ENet is licensed under
-a short-and-sweet MIT-style license, which gives you the freedom to do anything 
-you want with it (well, almost anything).
-
-