/**************************************************************************** * net/bluetooth/bluetooth.h * * Copyright (C) 2018 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ #ifndef _NET_BLUETOOTH_BLUETOOTH_H #define _NET_BLUETOOTH_BLUETOOTH_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #ifdef CONFIG_NET_BLUETOOTH /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Allocate a new Bluetooth socket data callback */ #define bluetooth_callback_alloc(dev,conn) \ devif_callback_alloc(dev, &conn->list) #define bluetooth_callback_free(dev,conn,cb) \ devif_conn_callback_free(dev, cb, &conn->list) /* Memory Pools */ #define BLUETOOTH_POOL_PREALLOCATED 0 #define BLUETOOTH_POOL_DYNAMIC 1 /**************************************************************************** * Public Type Definitions ****************************************************************************/ /* Used for containing and queuing IOBs along with information about the * source of the frame. */ struct iob_s; /* Forward reference */ struct bluetooth_container_s { FAR struct bluetooth_container_s *bn_flink; /* Supports a singly linked list */ FAR struct iob_s *bn_iob; /* Contained IOB */ bt_addr_t bn_raddr; /* Source address of the packet */ uint8_t bn_channel; /* Source channel of the packet */ uint8_t bn_pool; /* See BLUETOOTH_POOL_* definitions */ }; /* Representation of a Bluetooth socket connection */ struct devif_callback_s; /* Forward reference */ struct bluetooth_conn_s { dq_entry_t bc_node; /* Supports a double linked list */ bt_addr_t bc_laddr; /* Locally bound / source address. * Necessary only to support multiple * Bluetooth devices */ bt_addr_t bc_raddr; /* Connected remote address */ uint8_t bc_channel; /* Connection channel */ uint8_t bc_crefs; /* Reference counts on this instance */ #if CONFIG_NET_BLUETOOTH_BACKLOG > 0 uint8_t bc_backlog; /* Number of frames in RX queue */ #endif /* Queue of incoming packets */ FAR struct bluetooth_container_s *bc_rxhead; FAR struct bluetooth_container_s *bc_rxtail; /* This is a list of Bluetooth callbacks. Each callback represents * a thread that is stalled, waiting for a device-specific event. */ FAR struct devif_callback_s *list; }; /**************************************************************************** * Public Data ****************************************************************************/ #ifdef __cplusplus # define EXTERN extern "C" extern "C" { #else # define EXTERN extern #endif /* The Bluetooth socket interface */ EXTERN const struct sock_intf_s g_bluetooth_sockif; /**************************************************************************** * Public Function Prototypes ****************************************************************************/ struct bluetooth_frame_meta_s; /* Forward reference */ struct radio_driver_s; /* Forward reference */ struct net_driver_s; /* Forward reference */ struct socket; /* Forward reference */ struct sockaddr; /* Forward reference */ /**************************************************************************** * Name: bluetooth_initialize() * * Description: * Initialize the Bluetooth socket support. Called once and only * from the network initialization logic. * * Assumptions: * Called early in the initialization sequence * ****************************************************************************/ void bluetooth_initialize(void); /**************************************************************************** * Name: bluetooth_conn_initialize * * Description: * Initialize the Bluetooth connection structure allocator. Called * once and only from bluetooth_initialize(). * * Assumptions: * Called early in the initialization sequence * ****************************************************************************/ void bluetooth_conn_initialize(void); /**************************************************************************** * Name: bluetooth_conn_alloc() * * Description: * Allocate a new, uninitialized Bluetooth socket connection * structure. This is normally something done by the implementation of * the socket() API * ****************************************************************************/ FAR struct bluetooth_conn_s *bluetooth_conn_alloc(void); /**************************************************************************** * Name: bluetooth_conn_free() * * Description: * Free a Bluetooth socket connection structure that is no longer in * use. This should be done by the implementation of close(). * ****************************************************************************/ void bluetooth_conn_free(FAR struct bluetooth_conn_s *conn); /**************************************************************************** * Name: bluetooth_conn_active() * * Description: * Find a connection structure that is the appropriate * connection to be used with the provided Ethernet header * * Assumptions: * This function is called from network logic at with the network locked. * ****************************************************************************/ FAR struct bluetooth_conn_s * bluetooth_conn_active(FAR const struct bluetooth_frame_meta_s *meta); /**************************************************************************** * Name: bluetooth_conn_next() * * Description: * Traverse the list of allocated Bluetooth connections * * Assumptions: * This function is called from network logic at with the network locked. * ****************************************************************************/ FAR struct bluetooth_conn_s * bluetooth_conn_next(FAR struct bluetooth_conn_s *conn); /**************************************************************************** * Name: bluetooth_input * * Description: * Handle incoming Bluetooth input * * This function is called when the radio device driver has received an * frame from the network. The frame from the device driver must be * provided in by the IOB frame argument of the function call: * * - The frame data is in the IOB io_data[] buffer, * - The length of the frame is in the IOB io_len field, and * - The offset past and radio MAC header is provided in the io_offset * field. * * The frame argument may refer to a single frame (a list of length one) * or may it be the head of a list of multiple frames. * * - The io_flink field points to the next frame in the list (if enable) * - The last frame in the list will have io_flink == NULL. * * Input Parameters: * radio The radio network driver interface. * framelist - The head of an incoming list of frames. Normally this * would be a single frame. A list may be provided if * appropriate, however. * meta - Meta data characterizing the received frame. * * If there are multiple frames in the list, this metadata * must apply to all of the frames in the list. * * Returned Value: * OK The Bluetooth has been processed and can be deleted * ERROR Hold the Bluetooth and try again later. There is a listening * socket but no recv in place to catch the Bluetooth yet. * Useful when a packet arrives before a recv call is in place. * * Assumptions: * Called from the network diver with the network locked. * ****************************************************************************/ /* bluetooth_input() is prototyped in include/nuttx/net/bluetooth.h */ /**************************************************************************** * Name: bluetooth_callback * * Description: * Inform the application holding the Bluetooth socket of a change in state. * * Returned Value: * OK if Bluetooth has been processed, otherwise ERROR. * * Assumptions: * This function is called from network logic at with the network locked. * ****************************************************************************/ uint16_t bluetooth_callback(FAR struct radio_driver_s *radio, FAR struct bluetooth_conn_s *conn, uint16_t flags); /**************************************************************************** * Name: bluetooth_recvfrom * * Description: * Implements the socket recvfrom interface for the case of the AF_INET * and AF_INET6 address families. bluetooth_recvfrom() receives messages from * a socket, and may be used to receive data on a socket whether or not it * is connection-oriented. * * If 'from' is not NULL, and the underlying protocol provides the source * address, this source address is filled in. The argument 'fromlen' is * initialized to the size of the buffer associated with from, and * modified on return to indicate the actual size of the address stored * there. * * Input Parameters: * psock A pointer to a NuttX-specific, internal socket structure * buf Buffer to receive data * len Length of buffer * flags Receive flags * from Address of source (may be NULL) * fromlen The length of the address structure * * Returned Value: * On success, returns the number of characters received. If no data is * available to be received and the peer has performed an orderly shutdown, * recv() will return 0. Otherwise, on errors, a negated errno value is * returned (see recvfrom() for the list of appropriate error values). * ****************************************************************************/ ssize_t bluetooth_recvfrom(FAR struct socket *psock, FAR void *buf, size_t len, int flags, FAR struct sockaddr *from, FAR socklen_t *fromlen); /**************************************************************************** * Name: bluetooth_find_device * * Description: * Select the network driver to use with the Bluetooth transaction. * * Input Parameters: * conn - Bluetooth connection structure (not currently used). * addr - The address to match the devices assigned address * * Returned Value: * A pointer to the network driver to use. NULL is returned on any * failure. * ****************************************************************************/ FAR struct radio_driver_s * bluetooth_find_device(FAR struct bluetooth_conn_s *conn, FAR const bt_addr_t *addr); /**************************************************************************** * Name: bluetooth_poll * * Description: * Poll a Bluetooth "connection" structure for availability of TX data * * Input Parameters: * dev - The device driver structure to use in the send operation * conn - The Bluetooth "connection" to poll for TX data * * Returned Value: * None * * Assumptions: * Called from the network device interface (devif) with the network * locked. * ****************************************************************************/ void bluetooth_poll(FAR struct net_driver_s *dev, FAR struct bluetooth_conn_s *conn); /**************************************************************************** * Name: psock_bluetooth_sendto * * Description: * If sendto() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET) * socket, the parameters to and 'tolen' are ignored (and the error EISCONN * may be returned when they are not NULL and 0), and the error ENOTCONN is * returned when the socket was not actually connected. * * Input Parameters: * psock A pointer to a NuttX-specific, internal socket structure * buf Data to send * len Length of data to send * flags Send flags * to Address of recipient * tolen The length of the address structure * * Returned Value: * On success, returns the number of characters sent. On error, * a negated errno value is retruend. See sendto() for the complete list * of return values. * ****************************************************************************/ ssize_t psock_bluetooth_sendto(FAR struct socket *psock, FAR const void *buf, size_t len, int flags, FAR const struct sockaddr *to, socklen_t tolen); /**************************************************************************** * Name: bluetooth_container_initialize * * Description: * This function initializes the container allocator. This function must * be called early in the initialization sequence before any socket * activity. * * Input Parameters: * None * * Returned Value: * None * * Assumptions: * Called early in the initialization sequence * ****************************************************************************/ void bluetooth_container_initialize(void); /**************************************************************************** * Name: bluetooth_container_allocate * * Description: * The bluetooth_container_allocate function will get a free continer * for use by the recvfrom() logic. * * This function will first attempt to allocate from the g_free_container * list. If that the list is empty, then the meta-data structure will be * allocated from the dynamic memory pool. * * Input Parameters: * None * * Returned Value: * A reference to the allocated container structure. All user fields in this * structure have been zeroed. On a failure to allocate, NULL is * returned. * * Assumptions: * The caller has locked the network. * ****************************************************************************/ FAR struct bluetooth_container_s *bluetooth_container_allocate(void); /**************************************************************************** * Name: bluetooth_container_free * * Description: * The bluetooth_container_free function will return a container structure * to the free list of containers if it was a pre-allocated container * structure. If the container structure was allocated dynamically it will * be deallocated. * * Input Parameters: * container - container structure to free * * Returned Value: * None * * Assumptions: * The caller has locked the network. * ****************************************************************************/ void bluetooth_container_free(FAR struct bluetooth_container_s *container); #undef EXTERN #ifdef __cplusplus } #endif #endif /* CONFIG_NET_BLUETOOTH */ #endif /* _NET_BLUETOOTH_BLUETOOTH_H */