Receive udp packet in simulink

Good morning for everyone. I have a problem with simulink and c++ aplication. I send UDP packets (structure with int variables) from the c++ application to the simulink. I receive the packet and then I use an unpack(int32 unpacking) packet to descompose it. The problem is that if I send the number 5 I want to get the number 5 but I get different values (I think it is similar to bits but I don`t know).

Thank you for all.