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incubator-nuttx/net/bluetooth/bluetooth_sockif.c

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/****************************************************************************
* net/bluetooth/bluetooth_sockif.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <socket/socket.h>
#include <netpacket/bluetooth.h>
#include <nuttx/net/net.h>
#include <nuttx/net/radiodev.h>
#include <nuttx/net/bluetooth.h>
#include <nuttx/wireless/bluetooth/bt_hci.h>
#include "bluetooth/bluetooth.h"
#ifdef CONFIG_NET_BLUETOOTH
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int bluetooth_setup(FAR struct socket *psock);
static sockcaps_t bluetooth_sockcaps(FAR struct socket *psock);
static void bluetooth_addref(FAR struct socket *psock);
static int bluetooth_bind(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen);
static int bluetooth_getsockname(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR socklen_t *addrlen);
static int bluetooth_getpeername(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR socklen_t *addrlen);
static int bluetooth_connect(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen);
static int bluetooth_close(FAR struct socket *psock);
/* Protocol Specific Interfaces */
static int bluetooth_l2cap_bind(FAR struct socket *psock,
FAR const struct sockaddr_l2 *addr, socklen_t addrlen);
static int bluetooth_hci_bind(FAR struct socket *psock,
FAR const struct sockaddr_hci *addr,
socklen_t addrlen);
/****************************************************************************
* Public Data
****************************************************************************/
const struct sock_intf_s g_bluetooth_sockif =
{
bluetooth_setup, /* si_setup */
bluetooth_sockcaps, /* si_sockcaps */
bluetooth_addref, /* si_addref */
bluetooth_bind, /* si_bind */
bluetooth_getsockname, /* si_getsockname */
bluetooth_getpeername, /* si_getpeername */
NULL, /* si_listen */
bluetooth_connect, /* si_connect */
NULL, /* si_accept */
NULL, /* si_poll */
bluetooth_sendmsg, /* si_sendmsg */
bluetooth_recvmsg, /* si_recvmsg */
bluetooth_close /* si_close */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: bluetooth_sockif_alloc
*
* Description:
* Allocate and attach a PF_BLUETOOTH connection structure.
*
* Assumptions:
* The network is locked
*
****************************************************************************/
static int bluetooth_sockif_alloc(FAR struct socket *psock)
{
/* Allocate the packet socket connection structure and save in the new
* socket instance.
*/
FAR struct bluetooth_conn_s *conn = bluetooth_conn_alloc();
if (conn == NULL)
{
/* Failed to reserve a connection structure */
return -ENOMEM;
}
/* Set the reference count on the connection structure. This reference
* count will be incremented only if the socket is dup'ed
*/
DEBUGASSERT(conn->bc_crefs == 0);
conn->bc_crefs = 1;
/* Save the pre-allocated connection in the socket structure */
psock->s_conn = conn;
return OK;
}
/****************************************************************************
* Name: bluetooth_setup
*
* Description:
* Called for socket() to verify that the provided socket type and
* protocol are usable by this address family. Perform any family-
* specific socket fields.
*
* Input Parameters:
* psock A pointer to a user allocated socket structure to be
* initialized.
*
* Returned Value:
* Zero (OK) is returned on success. Otherwise, a negated errno value is
* returned.
*
****************************************************************************/
static int bluetooth_setup(FAR struct socket *psock)
{
/* Allocate the appropriate connection structure. This reserves the
* connection structure, it is unallocated at this point. It will not
* actually be initialized until the socket is connected.
*
* SOCK_RAW and SOCK_CTRL are supported
*/
if (psock->s_type == SOCK_RAW || psock->s_type == SOCK_CTRL)
{
return bluetooth_sockif_alloc(psock);
}
else
{
return -EPROTONOSUPPORT;
}
}
/****************************************************************************
* Name: bluetooth_sockcaps
*
* Description:
* Return the bit encoded capabilities of this socket.
*
* Input Parameters:
* psock - Socket structure of the socket whose capabilities are being
* queried.
*
* Returned Value:
* The set of socket capabilities is returned.
*
****************************************************************************/
static sockcaps_t bluetooth_sockcaps(FAR struct socket *psock)
{
return 0;
}
/****************************************************************************
* Name: bluetooth_addref
*
* Description:
* Increment the reference count on the underlying connection structure.
*
* Input Parameters:
* psock - Socket structure of the socket whose reference count will be
* incremented.
*
* Returned Value:
* None
*
****************************************************************************/
static void bluetooth_addref(FAR struct socket *psock)
{
FAR struct bluetooth_conn_s *conn;
DEBUGASSERT(psock->s_type == SOCK_RAW || psock->s_type == SOCK_CTRL);
conn = psock->s_conn;
DEBUGASSERT(conn->bc_crefs > 0 && conn->bc_crefs < 255);
conn->bc_crefs++;
}
/****************************************************************************
* Name: bluetooth_connect
*
* Description:
* bluetooth_connect() connects the local socket referred to by the
* structure 'psock' to the address specified by 'addr'. The addrlen
* argument specifies the size of 'addr'. The format of the address in
* 'addr' is determined by the address space of the socket 'psock'.
*
* Generally, connection-based protocol sockets may successfully
* bluetooth_connect() only once; connectionless protocol sockets may use
* bluetooth_connect() multiple times to change their association.
* Connectionless sockets may dissolve the association by connecting to
* an address with the bt_family member of sockaddr set to AF_UNSPEC.
*
* Input Parameters:
* psock Pointer to a socket structure initialized by psock_socket()
* addr Server address (form depends on type of socket)
* addrlen Length of actual 'addr'
*
* Returned Value:
* 0 on success; a negated errno value on failure. See connect() for the
* list of appropriate errno values to be returned.
*
****************************************************************************/
static int bluetooth_connect(FAR struct socket *psock,
FAR const struct sockaddr *addr,
socklen_t addrlen)
{
FAR struct bluetooth_conn_s *conn;
FAR struct sockaddr_l2 *btaddr;
int ret = OK;
conn = psock->s_conn;
/* Verify the address family */
if (addr->sa_family == AF_BLUETOOTH)
{
/* Verify the Protocol */
if (psock->s_proto != BTPROTO_L2CAP)
{
return -EPFNOSUPPORT;
}
/* Save the "connection" address */
btaddr = (FAR struct sockaddr_l2 *)addr;
memcpy(&conn->bc_raddr, &btaddr->l2_bdaddr, sizeof(bt_addr_t));
conn->bc_channel = btaddr->l2_cid;
conn->bc_proto = psock->s_proto;
}
else
{
/* The specified address is not a valid address for the address family
* of the specified socket.
*/
ret = -EAFNOSUPPORT;
}
return ret;
}
/****************************************************************************
* Name: bluetooth_bind
*
* Description:
* bluetooth_bind() gives the socket 'psock' the local address 'addr'.
* 'addr' is 'addrlen' bytes long. Traditionally, this is called
* "assigning a name to a socket." When a socket is created with
* socket(), it exists in a name space (address family) but has no name
* assigned.
*
* Input Parameters:
* psock Socket structure of the socket to bind
* addr Socket local address
* addrlen Length of 'addr'
*
* Returned Value:
* 0 on success; A negated errno value is returned on failure. See
* bind() for a list a appropriate error values.
*
****************************************************************************/
static int bluetooth_bind(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen)
{
/* Verify that a valid address has been provided */
if (addr->sa_family != AF_BLUETOOTH)
{
nerr("ERROR: Invalid family: %u\n", addr->sa_family);
return -EBADF;
}
switch (psock->s_proto)
{
case BTPROTO_L2CAP:
{
FAR const struct sockaddr_l2 *iaddr;
if (addrlen < sizeof(struct sockaddr_l2))
{
nerr("ERROR: Invalid address length: %zu < %zu\n",
(size_t)addrlen, sizeof(struct sockaddr_l2));
return -EBADF;
}
iaddr = (FAR const struct sockaddr_l2 *)addr;
return bluetooth_l2cap_bind(psock, iaddr, addrlen);
}
case BTPROTO_HCI:
{
FAR const struct sockaddr_hci *hciaddr;
if (addrlen < sizeof(struct sockaddr_hci))
{
nerr("ERROR: Invalid address length: %zu < %zu\n",
(size_t)addrlen, sizeof(struct sockaddr_hci));
return -EBADF;
}
hciaddr = (FAR const struct sockaddr_hci *)addr;
return bluetooth_hci_bind(psock, hciaddr, addrlen);
}
default:
return -EPFNOSUPPORT;
}
return OK;
}
/****************************************************************************
* Name: bluetooth_l2cap_bind
*
* Description:
* bluetooth_bind() gives the socket 'psock' the local address 'iaddr'.
* 'iaddr' is 'addrlen' bytes long. Traditionally, this is called
* "assigning a name to a socket." When a socket is created with
* socket(), it exists in a name space (address family) but has no name
* assigned.
*
* Input Parameters:
* psock Socket structure of the socket to bind
* iaddr Socket local address
* addrlen Length of 'addr'
*
* Returned Value:
* 0 on success; A negated errno value is returned on failure. See
* bind() for a list a appropriate error values.
*
****************************************************************************/
static int bluetooth_l2cap_bind(FAR struct socket *psock,
FAR const struct sockaddr_l2 *iaddr,
socklen_t addrlen)
{
FAR struct radio_driver_s *radio;
FAR struct bluetooth_conn_s *conn;
/* Bind a PF_BLUETOOTH socket to an network device.
*
* SOCK_RAW and SOCK_CTRL are supported
*/
if (psock == NULL || psock->s_conn == NULL ||
(psock->s_type != SOCK_RAW && psock->s_type != SOCK_CTRL))
{
nerr("ERROR: Invalid socket type: %u\n", psock->s_type);
return -EBADF;
}
conn = psock->s_conn;
/* Verify that the socket is not already bound. */
if (_SS_ISBOUND(conn->bc_conn.s_flags))
{
nerr("ERROR: Already bound\n");
return -EINVAL;
}
/* Very that some address was provided.
*
* REVISIT: Currently and explicit address must be assigned. Should we
* support some moral equivalent to INADDR_ANY?
*/
conn->bc_proto = psock->s_proto;
/* Find the device associated with the requested address */
radio = bluetooth_find_device(conn, &iaddr->l2_bdaddr);
if (radio == NULL)
{
nerr("ERROR: No radio at this address\n");
return -ENODEV;
}
/* Save the address as the socket's local address */
memcpy(&conn->bc_laddr, &iaddr->l2_bdaddr, sizeof(bt_addr_t));
return OK;
}
/****************************************************************************
* Name: bluetooth_l2cap_bind
*
* Description:
* bluetooth_bind() gives the socket 'psock' the local address 'hciaddr'.
* 'hciaddr' is 'addrlen' bytes long. Traditionally, this is called
* "assigning a name to a socket." When a socket is created with
* socket(), it exists in a name space (address family) but has no name
* assigned.
*
* Input Parameters:
* psock Socket structure of the socket to bind
* hciaddr Socket local address
* addrlen Length of 'addr'
*
* Returned Value:
* 0 on success; A negated errno value is returned on failure. See
* bind() for a list a appropriate error values.
*
****************************************************************************/
static int bluetooth_hci_bind(FAR struct socket *psock,
FAR const struct sockaddr_hci *hciaddr,
socklen_t addrlen)
{
FAR struct bluetooth_conn_s *conn;
/* Bind a PF_BLUETOOTH socket to an network device.
*
* SOCK_RAW and SOCK_CTRL are supported
*/
if (psock == NULL || psock->s_conn == NULL ||
(psock->s_type != SOCK_RAW && psock->s_type != SOCK_CTRL))
{
nerr("ERROR: Invalid socket type: %u\n", psock->s_type);
return -EBADF;
}
conn = psock->s_conn;
/* Verify that the socket is not already bound. */
if (_SS_ISBOUND(conn->bc_conn.s_flags))
{
nerr("ERROR: Already bound\n");
return -EINVAL;
}
conn->bc_proto = psock->s_proto;
conn->bc_channel = hciaddr->hci_channel;
conn->bc_ldev = hciaddr->hci_dev;
return OK;
}
/****************************************************************************
* Name: bluetooth_getsockname
*
* Description:
* The bluetooth_getsockname() function retrieves the locally-bound name of
* the specified packet socket, stores this address in the sockaddr
* structure pointed to by the 'addr' argument, and stores the length of
* this address in the object pointed to by the 'addrlen' argument.
*
* If the actual length of the address is greater than the length of the
* supplied sockaddr structure, the stored address will be truncated.
*
* If the socket has not been bound to a local name, the value stored in
* the object pointed to by address is unspecified.
*
* Input Parameters:
* psock Socket structure of the socket to be queried
* addr sockaddr structure to receive data [out]
* addrlen Length of sockaddr structure [in/out]
*
* Returned Value:
* On success, 0 is returned, the 'addr' argument points to the address
* of the socket, and the 'addrlen' argument points to the length of the
* address. Otherwise, a negated errno value is returned. See
* getsockname() for the list of appropriate error numbers.
*
****************************************************************************/
static int bluetooth_getsockname(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR
socklen_t *addrlen)
{
FAR struct bluetooth_conn_s *conn;
FAR struct sockaddr_l2 tmp;
socklen_t copylen;
conn = psock->s_conn;
/* Create a copy of the full address on the stack */
tmp.l2_family = AF_BLUETOOTH;
memcpy(&tmp.l2_bdaddr, &conn->bc_laddr, sizeof(bt_addr_t));
/* Copy to the user buffer, truncating if necessary */
copylen = sizeof(struct sockaddr_l2);
if (copylen > *addrlen)
{
copylen = *addrlen;
}
memcpy(addr, &tmp, copylen);
/* Return the actual size transferred */
*addrlen = copylen;
return OK;
}
/****************************************************************************
* Name: bluetooth_getpeername
*
* Description:
* The bluetooth_getpeername() function retrieves the remote-connected name
* of the specified local socket, stores this address in the sockaddr
* structure pointed to by the 'addr' argument, and stores the length of
* this address in the object pointed to by the 'addrlen' argument.
*
* If the actual length of the address is greater than the length of the
* supplied sockaddr structure, the stored address will be truncated.
*
* If the socket has not been bound to a local name, the value stored in
* the object pointed to by address is unspecified.
*
* Parameters:
* psock Socket structure of the socket to be queried
* addr sockaddr structure to receive data [out]
* addrlen Length of sockaddr structure [in/out]
*
* Returned Value:
* On success, 0 is returned, the 'addr' argument points to the address
* of the socket, and the 'addrlen' argument points to the length of the
* address. Otherwise, a negated errno value is returned. See
* getpeername() for the list of appropriate error numbers.
*
****************************************************************************/
static int bluetooth_getpeername(FAR struct socket *psock,
FAR struct sockaddr *addr,
FAR socklen_t *addrlen)
{
FAR struct bluetooth_conn_s *conn;
FAR struct sockaddr_l2 tmp;
socklen_t copylen;
if (psock->s_proto != BTPROTO_L2CAP)
{
return -EPFNOSUPPORT;
}
conn = psock->s_conn;
/* Create a copy of the full address on the stack */
tmp.l2_family = AF_BLUETOOTH;
memcpy(&tmp.l2_bdaddr, &conn->bc_raddr, sizeof(bt_addr_t));
/* Copy to the user buffer, truncating if necessary */
copylen = sizeof(struct sockaddr_l2);
if (copylen > *addrlen)
{
copylen = *addrlen;
}
memcpy(addr, &tmp, copylen);
/* Return the actual size transferred */
*addrlen = copylen;
return OK;
}
/****************************************************************************
* Name: bluetooth_close
*
* Description:
* Performs the close operation on a PF_BLUETOOTH socket instance
*
* Input Parameters:
* psock Socket instance
*
* Returned Value:
* 0 on success; a negated errno value is returned on any failure.
*
* Assumptions:
*
****************************************************************************/
static int bluetooth_close(FAR struct socket *psock)
{
/* Perform some pre-close operations for the PF_BLUETOOTH address type */
switch (psock->s_type)
{
/* SOCK_RAW and SOCK_CTRL are supported */
case SOCK_RAW:
case SOCK_CTRL:
{
FAR struct bluetooth_conn_s *conn = psock->s_conn;
/* Is this the last reference to the connection structure (there
* could be more if the socket was dup'ed).
*/
if (conn->bc_crefs <= 1)
{
/* Yes... free the connection structure */
conn->bc_crefs = 0; /* No more references on the connection */
bluetooth_conn_free(psock->s_conn); /* Free network resources */
}
else
{
/* No.. Just decrement the reference count */
conn->bc_crefs--;
}
return OK;
}
default:
return -EBADF;
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
#endif /* CONFIG_NET_BLUETOOTH */
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