/**************************************************************************** * net/bluetooth/bluetooth.h * * 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. * ****************************************************************************/ #ifndef __NET_BLUETOOTH_BLUETOOTH_H #define __NET_BLUETOOTH_BLUETOOTH_H /**************************************************************************** * Included Files ****************************************************************************/ #include #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->bc_conn.list, &conn->bc_conn.list_tail) #define bluetooth_callback_free(dev,conn,cb) \ devif_conn_callback_free(dev, cb, &conn->bc_conn.list, &conn->bc_conn.list_tail) /* 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 { /* Common prologue of all connection structures. */ struct socket_conn_s bc_conn; /* Bluetooth-specific content follows. */ 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_ldev; /* Locally bound device */ 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 uint8_t bc_proto; /* Protocol */ /* Queue of incoming packets */ FAR struct bluetooth_container_s *bc_rxhead; FAR struct bluetooth_container_s *bc_rxtail; }; /**************************************************************************** * 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_recvmsg * * Description: * Implements the socket recvfrom interface for the case of the AF_INET * and AF_INET6 address families. bluetooth_recvmsg() receives messages * from a socket, and may be used to receive data on a socket whether or * not it is connection-oriented. * * If msg_name is not NULL, and the underlying protocol provides the source * address, this source address is filled in. The argument 'msg_namelen' is * initialized to the size of the buffer associated with msg_name, 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 * msg Buffer to receive data * flags Receive flags * * 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, * recvmsg() will return 0. Otherwise, on errors, a negated errno value is * returned (see recvmsg() for the list of appropriate error values). * ****************************************************************************/ ssize_t bluetooth_recvmsg(FAR struct socket *psock, FAR struct msghdr *msg, int flags); /**************************************************************************** * 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: bluetooth_sendmsg * * Description: * If sendmsg() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET) * socket, the parameters msg_name and msg_namelen 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 * msg data to send * flags Send flags * * Returned Value: * On success, returns the number of characters sent. On error, * a negated errno value is returned. See sendmsg() for the complete list * of return values. * ****************************************************************************/ ssize_t bluetooth_sendmsg(FAR struct socket *psock, FAR struct msghdr *msg, int flags); /**************************************************************************** * 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 container * 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 */