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https://github.com/zephyrproject-rtos/zephyr
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33c50f332b
This patch adds support for the ATT fixed channel. A dedicated att.c file is added to handle the ATT protocol handling. Change-Id: I2e481f56168b6f1b4c564f10d25dee0a85fb968f Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/* att.c - Attribute protocol handling */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <nanokernel.h>
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#include <toolchain.h>
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#include <string.h>
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#include <errno.h>
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#include <misc/byteorder.h>
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#include <bluetooth/hci.h>
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#include <bluetooth/bluetooth.h>
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#include "hci_core.h"
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#include "conn.h"
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#include "l2cap.h"
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#include "att.h"
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static void send_err_rsp(struct bt_conn *conn, uint8_t req, uint16_t handle,
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uint8_t err)
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{
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struct bt_att_error_rsp *rsp;
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struct bt_att_hdr *hdr;
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struct bt_buf *buf;
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buf = bt_l2cap_create_pdu(conn, BT_L2CAP_CID_ATT,
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sizeof(*hdr) + sizeof(*rsp));
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if (!buf)
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return;
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hdr = (void *)bt_buf_add(buf, sizeof(*hdr));
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hdr->code = BT_ATT_ERROR_RSP;
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rsp = (void *)bt_buf_add(buf, sizeof(*rsp));
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rsp->request = req;
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rsp->handle = sys_cpu_to_le16(handle);
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rsp->error = err;
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bt_conn_send(conn, buf);
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}
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void bt_att_recv(struct bt_conn *conn, struct bt_buf *buf)
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{
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struct bt_att_hdr *hdr = (void *)buf->data;
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if (buf->len < sizeof(*hdr)) {
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BT_ERR("Too small ATT PDU received\n");
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goto done;
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}
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BT_DBG("Received ATT code %u len %u\n", buf->len);
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bt_buf_pull(buf, sizeof*hdr);
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switch (hdr->code) {
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default:
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BT_DBG("Unhandled ATT code %u\n", hdr->code);
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send_err_rsp(conn, hdr->code, 0, BT_ATT_ERR_NOT_SUPPORTED);
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break;
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}
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done:
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bt_buf_put(buf);
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}
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