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Reference for unit 'Sockets' (#rtl)

fprecv

Receive data on socket

Declaration

Source position: socketsh.inc line 157

function fprecv(

s: cint;

buf: pointer;

len: size_t;

flags: cint

Description

fpRecv reads at most len bytes from socket S into address buf. The socket must be in a connected state. Flags can be one of the following:

1: Process out-of band data.
4: Bypass routing, use a direct interface.
??: Wait for full request or report an error.

The functions returns the number of bytes actually read from the socket, or -1 if a detectable error occurred.

Errors

Errors are reported in SocketError, and include the following:

ESockEBADF: The socket descriptor is invalid.
ESockENOTCONN: The socket isn't connected.
ESockENOTSOCK: The descriptor is not a socket.
ESockEFAULT: The address is outside your address space.
ESockEMSGSIZE: The message cannot be sent atomically.
ESockEWOULDBLOCK: The requested operation would block the process.
ESockENOBUFS: The system doesn't have enough free buffers available.

See also

Send data through socket