1.7 KiB
PR_NewTCPSocket
Creates a new IPv4 TCP socket.
Syntax
#include <prio.h>
PRFileDesc* PR_NewTCPSocket(void);
Returns
The function returns one of the following values:
- Upon successful completion, a pointer to the {ref}
PRFileDescobject created for the newly opened IPv4 TCP socket. - If the creation of a new TCP socket failed,
NULL.
Description
TCP (Transmission Control Protocol) is a connection-oriented, reliable
byte-stream protocol of the TCP/IP protocol suite. {ref}PR_NewTCPSocket
creates a new IPv4 TCP socket. A TCP connection is established by a
passive socket (the server) accepting a connection setup request from an
active socket (the client). Typically, the server binds its socket to a
well-known port with {ref}PR_Bind, calls {ref}PR_Listen to start listening
for connection setup requests, and calls {ref}PR_Accept to accept a
connection. The client makes a connection request using {ref}PR_Connect.
After a connection is established, the client and server may send and
receive data between each other. To receive data, one can call
{ref}PR_Read or {ref}PR_Recv. To send data, one can call {ref}PR_Write,
{ref}PR_Writev, {ref}PR_Send, or {ref}PR_TransmitFile. {ref}PR_AcceptRead is
suitable for use by the server to accept a new client connection and
read the client's first request in one function call.
A TCP connection can be shut down by {ref}PR_Shutdown, and the sockets
should be closed by {ref}PR_Close.
See Also
{ref}PR_NewTCPSocket is deprecated because it is hardcoded to create an
IPv4 TCP socket. New code should use {ref}PR_OpenTCPSocket instead, which
allows the address family (IPv4 or IPv6) of the new TCP socket to be
specified.