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(libc.info)Transferring Data

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Transferring Data
-----------------

   Once a socket has been connected to a peer, you can use the ordinary
`read' and `write' operations (Note: I/O Primitives) to transfer
data.  A socket is a two-way communications channel, so read and write
operations can be performed at either end.

   There are also some I/O modes that are specific to socket operations.
In order to specify these modes, you must use the `recv' and `send'
functions instead of the more generic `read' and `write' functions.
The `recv' and `send' functions take an additional argument which you
can use to specify various flags to control special I/O modes.  For
example, you can specify the `MSG_OOB' flag to read or write
out-of-band data, the `MSG_PEEK' flag to peek at input, or the
`MSG_DONTROUTE' flag to control inclusion of routing information on
output.

Sending Data

Sending data with `send'.

Receiving Data

Reading data with `recv'.

Socket Data Options

Using `send' and `recv'.