Why not use libmysqlclient-dev ?

[oucboy]

I see that some interface of mysql has been moved to your project, i think it's better to use the library of mysql client.
BTW, the log file open and close each time it writes information, it's not necessary.

[hoterran]

where is interface of mysql？why use it？

[oucboy]

It is the interface of mysql client--mysqlclient library.
The library contains some interface you write them yourself again, such as uint2korr, net_field_length

[hoterran]

yeah，but other protocol unpack is simple， so i rewrite， you can see code is just 100+ lines。