How to read data into a variable (let it be an integer unsigned type, 2 bytes in size)?

Question

C++ / C#

Suppose you need to read data into a variable (let it be an unsigned integer type, 2 bytes in size).
How correct is it to do this:

unsigned short int packet_size = 0; //2 байта
recv(sockfd,(char*)&packet_size,2,MSG_WAITALL); //читаем в переменную

and can there be pitfalls?

Thanks in advance.

Answer 1

Among the pitfalls may be the following:
1 The socket must be opened before and closed after
2 Calling recv with the MSG_WAITALL parameter is blocking, i.e. if only one byte arrives, then the calling thread will be blocked until the next
3 byte order arrives. Most likely it will be LE, but you never know...
4 Data is accepted from any source. If you need otherwise - recvfrom(...)
5 Under Windows, there are restrictions on the operation of sockets