asio_kcp - a fast and reliable udp framework.

This framework will be the fastest protocal for pvp game.

kcp - a A Fast and Reliable ARQ Protocol (Can use with UDP)

website of kcp: https://github.com/skywind3000/kcp

This project wrap kcp by boost asio. Making it easy to use.

Feature

• Using in realtime pvp game that need miniest network delay. For example, the multiplayer first person shooting game.
• Reliable UDP protocal.
• Minimize delay. And the worst delay should be good. 3 or more times better than enet when worst network lag happen.
• Has good performace in wifi and phone network(3G, 4G).
• Extra using 20% ~ 50% network flow for speed improvement.

Bench mark

worst network lag happen:
asio: 10:51.21
291  295   269   268   231   195   249   230   225   204

enet: 10:51.21
1563   1520    1470    1482    1438    1454    1412    1637    1588    1540

You can see the bench mark test result at here

Or you can see the bench mark detail log at bench_mark folder.

client_lib

Feature:

• Do not using boost. And do not using feature of c++11
• It's implement by original thread and socket.
• client_lib_usage

Recommend: use Dockerfile to compiling the server and client.

• Please read the doc: docker/docker_readme.md

### Or create compiling env yourself
* I using gcc 4.8 * Other version of gcc that support c++11 should be OK. You can compile asio_kcp as verifying.

• I using boost 1.58

  • Other version of boost should be OK. You can compile asio_kcp as verifying.

• Build g2log

  • download g2log from official website
  • • or using the package in third_party folder.
  • cope g2log folder to third_party folder
  • $ cd third_party/g2log/ && mkdir build && cd build && cmake .. && make

• Build muduo

  • $ cd third_party/
  • $ git clone https://github.com/chenshuo/muduo.git
  • • or using the package in third_party folder. third_party folder.
  • $ cd muduo
  • compile on OSX: $ patch -p1 < MacOSX.diff
    • edit muduo/CMakeLists.txt.
      • find set(CXX_FLAGS then add 2 new line:
        • -D__GXX_EXPERIMENTAL_CXX0X__
        • -std=c++11
      • comment -march=native
      • comment set(CMAKE_CXX_COMPILER "clang++")
      • comment -Werror
      • uncomment -DMUDUO_STD_STRING
  • compile on linux:
    • edit muduo/CMakeLists.txt.
      • find set(CXX_FLAGS then add 2 new line:
        • -D__GXX_EXPERIMENTAL_CXX0X__
        • -std=c++11
      • uncomment -DMUDUO_STD_STRING
      • comment -Werror
  • modify muduo/base/LogStream.h kSmallBuffer = 4000 -> kSmallBuffer = 4000*4
  • adding VERBOSE=1 to "make" in muduo/build.sh will show detail of compiling.
  • $ CC=gcc CXX=g++ BUILD_DIR=./build BUILD_TYPE=release BUILD_NO_EXAMPLES=1 . ./build.sh

• modify the BOOST_LIB_PATH and BOOST_INC_PATH in allmake.sh

• do compiling at project root folder: $ . allmake.sh

The third_party folder should like below,

▾ third_party/
  ▾ g2log/
    ▸ build/
    ▸ src/
    ▸ test_example/
    ▸ test_performance/
    ▸ test_unit/
      CMakeLists.txt
  ▸ muduo/

Compile unit test

• download gtest from website
  • or just use the package in third_party folder.
• unpack the gtest-1.7.0.zip. coping gtest-1.7.0 folder to asio_kcp/third_party/
• $ cd gtest-1.7.0 && ./configure && make
• download googlemock from https://googlemock.googlecode.com/files/gmock-1.7.0.zip
  • or just use the package in third_party folder.
• unpack the gmock-1.7.0.zip. coping gmock-1.7.0 folder to asio_kcp/third_party/
• $ cd gmock-1.7.0 && ./configure && make
• back to asio_kcp folder then $ . utest_make.sh
• $ ./asio_kcp_utest/asio_kcp_utest

The third_party folder should like below,

▾ third_party/
  ▸ g2log/
  ▸ gmock-1.7.0/
  ▸ gtest-1.7.0/
  ▸ muduo/

Run example test

filter the verbose log from asio timer

./server/server 0.0.0.0 12345 2>&1 | grep --line-buffered -v -e deadline_timer -e "ec=system:0$" -e "|$" >>bserver.txt

filter all asio log

./client_with_asio/client_with_asio 23425 127.0.0.1 12345 500 2>/dev/null

run bench mark test of kcp.

• Server on your server

git checkout kcp_bench_mark_test
read the readme.md in this branch. and do compiling thing.
then run server on your server:
  ./server/server 0.0.0.0 12345 2>&1 | grep --line-buffered -v -e deadline_timer -e "ec=system:0$" -e "|$" >>bserver.txt

• run client on your client computer

git checkout kcp_bench_mark_test
read the readme.md in this branch. and do compiling thing.
./client_with_asio/client_with_asio 23445 120.26.200.117 12345 500 2>/dev/null
# Note: changing the ip and port to your server which is running the asio_kcp_server

how to test 3G/4G

• if you want to test the 3G/4G. you can share the wifi on your phone by using wiless AP. Making your client computer connect to this wifi.
• run client on your client computer (Note: changing the ip and port to your server)

Centos 6.5 install help:

boost http://www.boost.org/doc/libs/1_58_0/more/getting_started/unix-variants.html

• $ yum -y install python-devel
• $ tar jxvf boost_1_58_0.tar.bz2
• $ cd boost_1_58_0
• $ ./bootstrap.sh
• $ sudo ./b2 install --build-type=complete --layout=tagged

error when running server

/usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found

• strings /usr/lib64/libstdc++.so.6 | grep GLIBC // check the GLIBCXX_3.4.15. It is not in it.
• sudo find / -name "libstdc++.so*" 2>/dev/null // find the latest libstdc++.so It should be /usr/local/lib64/libstdc++.so.6.0.18
• sudo rm /usr/lib64/libstdc++.so.6
• sudo cp /usr/local/lib64/libstdc++.so.6.0.18 /usr/lib64/
• sudo ln -s /usr/lib64/libstdc++.so.6.0.18 /usr/lib64/libstdc++.so.6
• sudo vim /etc/ld.so.conf // add a new line: /usr/lib64
• sudo ldconfig // all ok

OSX install help

gcc 4.8

• install port if do not have one: https://www.macports.org/install.php
• port search gcc # show gcc version
• sudo /opt/local/bin/port install gcc48
• sudo /opt/local/bin/port select --set gcc mp-gcc48
• last step, close old shell, open a new shell.

https://apple.stackexchange.com/questions/118830/install-gcc-to-mac-via-terminal

http://www.tuicool.com/articles/reqiY3

boost 1.58

• https://stackoverflow.com/questions/104322/how-do-you-install-boost-on-macos