[Solved] differences of n in TCP and UDP?

Question

Both read and write return the number of bytes read/written, or -1 on error.

Note, that to be able to invoke read/write on a UDP socket (or, more generally, on a datagram socket) you have to invoke connect on it beforehand to specify the peer address.

Accepted Answer

Both read and write return the number of bytes read/written, or -1 on error.

Note, that to be able to invoke read/write on a UDP socket (or, more generally, on a datagram socket) you have to invoke connect on it beforehand to specify the peer address.