# zx_socket_create

## NAME

socket_create - create a socket

## SYNOPSIS

```
#include <zircon/syscalls.h>

zx_status_t zx_socket_create(uint32_t options,
                             zx_handle_t* out0, zx_handle_t* out1);

```

## DESCRIPTION

**socket_create**() creates a socket, a connected pair of
bidirectional stream transports, that can move only data, and that
have a maximum capacity.

Data written to one handle may be read from the opposite.

The *options* must set either the **ZX_SOCKET_STREAM** or
**ZX_SOCKET_DATAGRAM** flag.

The **ZX_SOCKET_HAS_CONTROL** flag may be set to enable the
socket control plane.

The **ZX_SOCKET_HAS_ACCEPT** flag may be set to enable transfer
of sockets over this socket via **socket_share**() and **socket_accept**().

## RIGHTS

TODO(ZX-2399)

## RETURN VALUE

**socket_create**() returns **ZX_OK** on success. In the event of
failure, one of the following values is returned.

## ERRORS

**ZX_ERR_INVALID_ARGS**  *out0* or *out1* is an invalid pointer or NULL or
*options* is any value other than **ZX_SOCKET_STREAM** or **ZX_SOCKET_DATAGRAM**.

**ZX_ERR_NO_MEMORY**  Failure due to lack of memory.
There is no good way for userspace to handle this (unlikely) error.
In a future build this error will no longer occur.

## LIMITATIONS

The maximum capacity is not currently set-able.

## SEE ALSO

[socket_accept](socket_accept.md),
[socket_read](socket_read.md),
[socket_share](socket_share.md),
[socket_write](socket_write.md).