/**************************************************************************** * net/bluetooth/bluetooth_sockif.c * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bluetooth/bluetooth.h" #ifdef CONFIG_NET_BLUETOOTH /**************************************************************************** * Private Function Prototypes ****************************************************************************/ static int bluetooth_setup(FAR struct socket *psock, int protocol); 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_listen(FAR struct socket *psock, int backlog); static int bluetooth_connect(FAR struct socket *psock, FAR const struct sockaddr *addr, socklen_t addrlen); static int bluetooth_accept(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen, FAR struct socket *newsock); static int bluetooth_poll_local(FAR struct socket *psock, FAR struct pollfd *fds, bool setup); 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 */ bluetooth_listen, /* si_listen */ bluetooth_connect, /* si_connect */ bluetooth_accept, /* si_accept */ bluetooth_poll_local, /* 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. * protocol (see sys/socket.h) * * Returned Value: * Zero (OK) is returned on success. Otherwise, a negated errno value is * returned. * ****************************************************************************/ static int bluetooth_setup(FAR struct socket *psock, int protocol) { /* 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. * * Only SOCK_RAW is supported */ if (psock->s_type == SOCK_RAW) { 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 cababilities 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 != NULL && psock->s_conn != NULL && psock->s_type == SOCK_RAW); conn = (FAR struct bluetooth_conn_s *)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; DEBUGASSERT(psock != NULL || addr != NULL); conn = (FAR struct bluetooth_conn_s *)psock->s_conn; DEBUGASSERT(conn != NULL); /* 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_accept * * Description: * The bluetooth_accept function is used with connection-based socket types * (SOCK_STREAM, SOCK_SEQPACKET and SOCK_RDM). It extracts the first * connection request on the queue of pending connections, creates a new * connected socket with mostly the same properties as 'sockfd', and * allocates a new socket descriptor for the socket, which is returned. The * newly created socket is no longer in the listening state. The original * socket 'sockfd' is unaffected by this call. Per file descriptor flags * are not inherited across an bluetooth_accept. * * The 'sockfd' argument is a socket descriptor that has been created with * socket(), bound to a local address with bind(), and is listening for * connections after a call to listen(). * * On return, the 'addr' structure is filled in with the address of the * connecting entity. The 'addrlen' argument initially contains the size * of the structure pointed to by 'addr'; on return it will contain the * actual length of the address returned. * * If no pending connections are present on the queue, and the socket is * not marked as non-blocking, bluetooth_accept blocks the caller until a * connection is present. If the socket is marked non-blocking and no * pending connections are present on the queue, bluetooth_accept returns * EAGAIN. * * Input Parameters: * psock Reference to the listening socket structure * addr Receives the address of the connecting client * addrlen Input: allocated size of 'addr', * Return: returned size of 'addr' * newsock Location to return the accepted socket information. * * Returned Value: * Returns 0 (OK) on success. On failure, it returns a negated errno * value. See accept() for a description of the appropriate error value. * * Assumptions: * The network is locked. * ****************************************************************************/ static int bluetooth_accept(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen, FAR struct socket *newsock) { return -EAFNOSUPPORT; } /**************************************************************************** * 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) { DEBUGASSERT(psock != NULL && addr != NULL); /* 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. * * Only SOCK_RAW is supported */ if (psock->s_type != SOCK_RAW) { nerr("ERROR: Invalid socket type: %u\n", psock->s_type); return -EBADF; } /* Verify that the socket is not already bound. */ if (_SS_ISBOUND(psock->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 = (FAR struct bluetooth_conn_s *)psock->s_conn; 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. * * Only SOCK_RAW is supported */ if (psock->s_type != SOCK_RAW) { nerr("ERROR: Invalid socket type: %u\n", psock->s_type); return -EBADF; } /* Verify that the socket is not already bound. */ if (_SS_ISBOUND(psock->s_flags)) { nerr("ERROR: Already bound\n"); return -EINVAL; } conn = (FAR struct bluetooth_conn_s *)psock->s_conn; 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; DEBUGASSERT(psock != NULL && addr != NULL && addrlen != NULL); conn = (FAR struct bluetooth_conn_s *)psock->s_conn; DEBUGASSERT(conn != NULL); /* 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; DEBUGASSERT(psock != NULL && addr != NULL && addrlen != NULL); if (psock->s_proto != BTPROTO_L2CAP) { return -EPFNOSUPPORT; } conn = (FAR struct bluetooth_conn_s *)psock->s_conn; DEBUGASSERT(conn != NULL); /* 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_listen * * Description: * To accept connections, a socket is first created with psock_socket(), a * willingness to accept incoming connections and a queue limit for * incoming connections are specified with psock_listen(), and then the * connections are accepted with psock_accept(). For the case of * PF_BLUETOOTH sockets, psock_listen() calls this function. The listen() * call does not apply only to PF_BLUETOOTH sockets. * * Input Parameters: * psock Reference to an internal, boound socket structure. * backlog The maximum length the queue of pending connections may grow. * If a connection request arrives with the queue full, the client * may receive an error with an indication of ECONNREFUSED or, * if the underlying protocol supports retransmission, the request * may be ignored so that retries succeed. * * Returned Value: * On success, zero is returned. On error, a negated errno value is * returned. See listen() for the set of appropriate error values. * ****************************************************************************/ int bluetooth_listen(FAR struct socket *psock, int backlog) { return -EOPNOTSUPP; } /**************************************************************************** * Name: bluetooth_poll * * Description: * The standard poll() operation redirects operations on socket descriptors * to net_poll which, indiectly, calls to function. * * Input Parameters: * psock - An instance of the internal socket structure. * fds - The structure describing the events to be monitored, OR NULL if * this is a request to stop monitoring events. * setup - true: Setup up the poll; false: Teardown the poll * * Returned Value: * 0: Success; Negated errno on failure * ****************************************************************************/ static int bluetooth_poll_local(FAR struct socket *psock, FAR struct pollfd *fds, bool setup) { /* We should need to support some kind of write ahead buffering for this * feature. */ #warning Missing logic return -ENOSYS; } /**************************************************************************** * 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) { /* Only SOCK_RAW is supported */ case SOCK_RAW: { 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 */