PR_RecvFrom
Receives bytes from a socket and stores the sending peer’s address.
Syntax
#include <prio.h>
PRInt32 PR_RecvFrom(
PRFileDesc *fd,
void *buf,
PRInt32 amount,
PRIntn flags,
PRNetAddr *addr,
PRIntervalTime timeout);
Parameters
The function has the following parameters:
fd
A pointer to a PRFileDesc object representing a socket.
buf
A pointer to a buffer containing the data received.
amount
The size of
buf
(in bytes).flags
This obsolete parameter must always be zero.
addr
A pointer to the PRNetAddr object that will be filled in with the address of the sending peer on return.
timeout
A value of type PRIntervalTime specifying the time limit for completion of the receive operation.
Returns
The function returns one of the following values:
A positive number indicates the number of bytes actually received.
The value 0 means the network connection is closed.
The value -1 indicates a failure. The reason for the failure can be obtained by calling PR_GetError.
Description
PR_RecvFrom receives up to a specified number of bytes from socket,
which may or may not be connected. The operation blocks until one or
more bytes are transferred, a timeout has occurred, or there is an
error. No more than amount
bytes will be transferred.
PR_RecvFrom is usually used with a UDP socket.