add static declaration
Merge branch 'master' of https://github.com/fengjingchao/peer_server
Merge branch 'master' of https://github.com/fengjingchao/peer_server
Merge branch 'master' of https://github.com/fengjingchao/peer_server
add tcp send part and tests
Merge pull request #4 from yifan-gu/master

add tcp send part, and tests