Stacksrv is an implementation of a stack which works through TCP and meets the following requirements:

1. stack should have POP and PUSH operations
2. POP should block until stack has data
3. stack should work through TCP with protocol:
   • first bit of an incoming message determines the command (0 for POP and 1 for PUSH)
   • next 7 bits determines size of a payload (for PUSH only)
   • following bytes is a payload.