578 lines
16 KiB
C
578 lines
16 KiB
C
/****************************************************************************
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* net/bluetooth/bluetooth_sendmsg.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include <netpacket/bluetooth.h>
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#include <arch/irq.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/radiodev.h>
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#include <nuttx/net/bluetooth.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/ip.h>
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#include <nuttx/wireless/bluetooth/bt_hci.h>
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#include "utils/utils.h"
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#include "netdev/netdev.h"
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#include "devif/devif.h"
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#include "socket/socket.h"
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#include "bluetooth/bluetooth.h"
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#ifdef CONFIG_NET_BLUETOOTH
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure holds the state of the send operation until it can be
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* operated upon from the event handler.
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*/
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struct bluetooth_sendto_s
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{
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FAR struct socket *is_sock; /* Points to the parent socket structure */
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FAR struct devif_callback_s *is_cb; /* Reference to callback instance */
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bt_addr_t is_destaddr; /* Frame destination address */
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uint16_t is_channel; /* Frame destination channel */
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sem_t is_sem; /* Used to wake up the waiting thread */
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FAR const uint8_t *is_buffer; /* User buffer of data to send */
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size_t is_buflen; /* Number of bytes in the is_buffer */
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ssize_t is_sent; /* The number of bytes sent (or error) */
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: bluetooth_sendto_eventhandler
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****************************************************************************/
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static uint16_t bluetooth_sendto_eventhandler(FAR struct net_driver_s *dev,
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FAR void *pvconn,
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FAR void *pvpriv,
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uint16_t flags)
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{
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FAR struct radio_driver_s *radio;
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FAR struct bluetooth_sendto_s *pstate;
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struct bluetooth_frame_meta_s meta;
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FAR struct iob_s *iob;
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int hdrlen;
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int ret;
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DEBUGASSERT(pvpriv != NULL && dev != NULL);
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/* Ignore polls from non Bluetooth network drivers */
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if (dev->d_lltype != NET_LL_BLUETOOTH)
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{
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return flags;
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}
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/* Make sure that this is the driver to which the socket is connected. */
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#warning Missing logic
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pstate = (FAR struct bluetooth_sendto_s *)pvpriv;
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radio = (FAR struct radio_driver_s *)dev;
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ninfo("flags: %04x sent: %zd\n", flags, pstate->is_sent);
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if (pstate != NULL && (flags & BLUETOOTH_POLL) != 0)
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{
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/* Initialize the meta data */
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BLUETOOTH_ADDRCOPY(&meta.bm_raddr, &pstate->is_destaddr);
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meta.bm_channel = pstate->is_channel;
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meta.bm_proto = pstate->is_sock->s_proto;
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/* Get the Bluetooth MAC header length */
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hdrlen = radio->r_get_mhrlen(radio, &meta);
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if (hdrlen < 0)
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{
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nerr("ERROR: Failed to get header length: %d\n", hdrlen);
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ret = hdrlen;
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goto errout;
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}
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/* Verify that the user buffer can fit within the frame with this
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* MAC header.
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*/
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DEBUGASSERT(BLUETOOTH_MAX_FRAMELEN <= CONFIG_IOB_BUFSIZE);
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if (pstate->is_buflen + hdrlen > BLUETOOTH_MAX_FRAMELEN)
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{
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nerr("ERROR: User buffer will not fit into the frame: %u > %u\n",
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(unsigned int)(pstate->is_buflen + hdrlen),
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(unsigned int)CONFIG_IOB_BUFSIZE);
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ret = -E2BIG;
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goto errout;
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}
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/* Allocate an IOB to hold the frame data */
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iob = net_ioballoc(false, IOBUSER_NET_SOCK_BLUETOOTH);
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if (iob == NULL)
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{
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nwarn("WARNING: Failed to allocate IOB\n");
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return flags;
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}
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/* Initialize the IOB */
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iob->io_offset = hdrlen;
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iob->io_len = pstate->is_buflen + hdrlen;
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iob->io_pktlen = pstate->is_buflen + hdrlen;
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/* Copy the user data into the IOB */
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memcpy(&iob->io_data[hdrlen], pstate->is_buffer, pstate->is_buflen);
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/* And submit the IOB to the network driver */
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ret = radio->r_req_data(radio, &meta, iob);
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if (ret < 0)
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{
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nerr("ERROR: r_req_data() failed: %d\n", ret);
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goto errout;
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}
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/* Save the successful result */
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pstate->is_sent = pstate->is_buflen;
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/* Don't allow any further call backs. */
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pstate->is_cb->flags = 0;
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pstate->is_cb->priv = NULL;
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pstate->is_cb->event = NULL;
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/* Wake up the waiting thread */
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nxsem_post(&pstate->is_sem);
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}
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return flags;
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errout:
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/* Don't allow any further call backs. */
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pstate->is_cb->flags = 0;
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pstate->is_cb->priv = NULL;
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pstate->is_cb->event = NULL;
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pstate->is_sent = ret;
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/* Wake up the waiting thread */
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nxsem_post(&pstate->is_sem);
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return flags;
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}
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/****************************************************************************
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* Name: bluetooth_sendto
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*
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* Description:
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* If sendto() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET)
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* socket, the parameters to and 'tolen' are ignored (and the error EISCONN
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* may be returned when they are not NULL and 0), and the error ENOTCONN is
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* returned when the socket was not actually connected.
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*
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* Input Parameters:
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* psock A pointer to a NuttX-specific, internal socket structure
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* buf Data to send
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* len Length of data to send
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* flags Send flags
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* to Address of recipient
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* tolen The length of the address structure
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*
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* Returned Value:
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* On success, returns the number of characters sent. On error,
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* a negated errno value is retruend. See sendto() for the complete list
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* of return values.
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*
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****************************************************************************/
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static ssize_t bluetooth_sendto(FAR struct socket *psock,
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FAR const void *buf, size_t len, int flags,
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FAR const struct sockaddr *to,
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socklen_t tolen)
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{
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FAR struct radio_driver_s *radio;
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FAR struct bluetooth_conn_s *conn;
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struct bluetooth_sendto_s state;
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int ret = OK;
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/* Only SOCK_RAW is supported */
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if (psock->s_type != SOCK_RAW)
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{
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/* EDESTADDRREQ. Signifies that the socket is not connection-mode and
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* no peer address is set.
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*/
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return -EDESTADDRREQ;
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}
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/* Verify that the sockfd corresponds to valid, allocated socket */
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if (psock == NULL || psock->s_conn == NULL)
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{
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return -EBADF;
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}
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conn = (FAR struct bluetooth_conn_s *)psock->s_conn;
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/* Verify that the address is large enough to be a valid PF_BLUETOOTH
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* address.
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*/
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if (tolen < sizeof(bt_addr_t))
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{
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return -EDESTADDRREQ;
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}
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/* Get the device driver that will service this transfer */
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if (psock->s_proto == BTPROTO_L2CAP)
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{
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radio = bluetooth_find_device(conn, &conn->bc_laddr);
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if (radio == NULL)
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{
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return -ENODEV;
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}
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}
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else if (psock->s_proto == BTPROTO_HCI)
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{
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/* TODO: should actually look among BT devices */
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radio =
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(FAR struct radio_driver_s *)netdev_findbyindex(conn->bc_ldev + 1);
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DEBUGASSERT(radio->r_dev.d_lltype == NET_LL_BLUETOOTH);
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if (radio == NULL)
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{
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return -ENODEV;
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}
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}
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else
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{
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return -EOPNOTSUPP;
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}
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/* Perform the send operation */
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/* Initialize the state structure. This is done with the network locked
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* because we don't want anything to happen until we are ready.
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*/
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net_lock();
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memset(&state, 0, sizeof(struct bluetooth_sendto_s));
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/* This semaphore is used for signaling and, hence, should not have
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* priority inheritance enabled.
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*/
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nxsem_init(&state.is_sem, 0, 0); /* Doesn't really fail */
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nxsem_set_protocol(&state.is_sem, SEM_PRIO_NONE);
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state.is_sock = psock; /* Socket descriptor to use */
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state.is_buflen = len; /* Number of bytes to send */
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state.is_buffer = buf; /* Buffer to send from */
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/* Copy the destination address */
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if (psock->s_proto == BTPROTO_L2CAP)
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{
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FAR struct sockaddr_l2 *destaddr = (FAR struct sockaddr_l2 *)to;
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memcpy(&state.is_destaddr, &destaddr->l2_bdaddr,
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sizeof(bt_addr_t));
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}
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else if (psock->s_proto == BTPROTO_HCI)
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{
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FAR struct sockaddr_hci *destaddr = (FAR struct sockaddr_hci *)to;
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state.is_channel = destaddr->hci_channel;
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}
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else
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{
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ret = -EOPNOTSUPP;
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goto err_with_net;
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}
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if (len > 0)
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{
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/* Allocate resource to receive a callback */
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state.is_cb = bluetooth_callback_alloc(&radio->r_dev, conn);
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if (state.is_cb)
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{
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/* Set up the callback in the connection */
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state.is_cb->flags = PKT_POLL;
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state.is_cb->priv = (FAR void *)&state;
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state.is_cb->event = bluetooth_sendto_eventhandler;
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/* Notify the device driver that new TX data is available. */
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netdev_txnotify_dev(&radio->r_dev);
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/* Wait for the send to complete or an error to occur.
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* net_lockedwait will also terminate if a signal is received.
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*/
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ret = net_lockedwait(&state.is_sem);
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/* Make sure that no further events are processed */
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bluetooth_callback_free(&radio->r_dev, conn, state.is_cb);
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}
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}
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nxsem_destroy(&state.is_sem);
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net_unlock();
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/* Check for a errors, Errors are signaled by negative errno values
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* for the send length
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*/
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if (state.is_sent < 0)
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{
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return state.is_sent;
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}
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/* If net_lockedwait failed, then we were probably reawakened by a signal.
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* In this case, net_lockedwait will have returned negated errno
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* appropriately.
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*/
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if (ret < 0)
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{
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return ret;
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}
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/* Return the number of bytes actually sent */
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return state.is_sent;
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err_with_net:
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nxsem_destroy(&state.is_sem);
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net_unlock();
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return ret;
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}
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/****************************************************************************
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* Name: bluetooth_l2cap_send
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*
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* Description:
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* Socket send() method for the PF_BLUETOOTH socket over BTPROTO_L2CAP.
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*
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* Input Parameters:
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* psock An instance of the internal socket structure.
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* buf Data to send
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* len Length of data to send
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* flags Send flags
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*
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* Returned Value:
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* On success, returns the number of characters sent. On error, a negated
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* errno value is returned (see send() for the list of appropriate error
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* values.
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*
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****************************************************************************/
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static ssize_t bluetooth_l2cap_send(FAR struct socket *psock,
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FAR const void *buf,
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size_t len, int flags)
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{
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struct sockaddr_l2 to;
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FAR struct bluetooth_conn_s *conn;
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ssize_t ret;
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conn = (FAR struct bluetooth_conn_s *)psock->s_conn;
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DEBUGASSERT(conn != NULL);
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if (!_SS_ISCONNECTED(psock->s_flags))
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{
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ret = -ENOTCONN;
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}
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else
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{
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to.l2_family = AF_BLUETOOTH;
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memcpy(&to.l2_bdaddr, &conn->bc_raddr, sizeof(bt_addr_t));
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to.l2_cid = conn->bc_channel;
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/* Then perform the send() as sendto() */
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ret = bluetooth_sendto(psock, buf, len, flags,
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(FAR const struct sockaddr *)&to,
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sizeof(struct sockaddr_l2));
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}
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return ret;
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}
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/****************************************************************************
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* Name: bluetooth_hci_send
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*
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* Description:
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* Socket send() method for the PF_BLUETOOTH socket over BTPROTO_HCI.
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*
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* Input Parameters:
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* psock An instance of the internal socket structure.
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* buf Data to send
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* len Length of data to send
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* flags Send flags
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*
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* Returned Value:
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* On success, returns the number of characters sent. On error, a negated
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* errno value is returned (see send() for the list of appropriate error
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* values.
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*
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****************************************************************************/
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static ssize_t bluetooth_hci_send(FAR struct socket *psock,
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FAR const void *buf,
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size_t len, int flags)
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{
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/* We only support sendto() for HCI sockets */
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return -EPFNOSUPPORT;
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}
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/****************************************************************************
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* Name: bluetooth_send
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*
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* Description:
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* Socket send() method for the PF_BLUETOOTH socket.
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*
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* Input Parameters:
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* psock An instance of the internal socket structure.
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* buf Data to send
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* len Length of data to send
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* flags Send flags
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*
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* Returned Value:
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* On success, returns the number of characters sent. On error, a negated
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* errno value is returned (see send() for the list of appropriate error
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* values.
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*
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****************************************************************************/
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static ssize_t bluetooth_send(FAR struct socket *psock, FAR const void *buf,
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size_t len, int flags)
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{
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ssize_t ret;
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DEBUGASSERT(psock != NULL || buf != NULL);
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/* Only SOCK_RAW is supported */
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if (psock->s_type == SOCK_RAW)
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{
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switch (psock->s_proto)
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{
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case BTPROTO_L2CAP:
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{
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ret = bluetooth_l2cap_send(psock, buf, len, flags);
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break;
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}
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case BTPROTO_HCI:
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{
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ret = bluetooth_hci_send(psock, buf, len, flags);
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break;
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}
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default:
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ret = -EPFNOSUPPORT;
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}
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}
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else
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{
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ret = -EINVAL;
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}
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return ret;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: bluetooth_sendmsg
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*
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* Description:
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* If sendmsg() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET)
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* socket, the parameters 'msg_name' and 'msg_namelen' are ignored (and the
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* error EISCONN may be returned when they are not NULL and 0), and the
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* error ENOTCONN is returned when the socket was not actually connected.
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*
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* Input Parameters:
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* psock A pointer to a NuttX-specific, internal socket structure
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* msg data to send
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* flags Send flags
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*
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* Returned Value:
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* On success, returns the number of characters sent. On error,
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* a negated errno value is returned. See sendmsg() for the complete list
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* of return values.
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*
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****************************************************************************/
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ssize_t bluetooth_sendmsg(FAR struct socket *psock, FAR struct msghdr *msg,
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int flags)
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{
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FAR const void *buf = msg->msg_iov->iov_base;
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size_t len = msg->msg_iov->iov_len;
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FAR const struct sockaddr *to = msg->msg_name;
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socklen_t tolen = msg->msg_namelen;
|
|
|
|
/* Validity check, only single iov supported */
|
|
|
|
if (msg->msg_iovlen != 1)
|
|
{
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
return to ? bluetooth_sendto(psock, buf, len, flags, to, tolen) :
|
|
bluetooth_send(psock, buf, len, flags);
|
|
}
|
|
|
|
#endif /* CONFIG_NET_BLUETOOTH */
|