485 lines
15 KiB
C
485 lines
15 KiB
C
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/******************************************************************************
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*
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* Copyright (C) 1999-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/*****************************************************************************
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*
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* This file contains collection of utility functions used the RFCOMM unit
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*
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*****************************************************************************/
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#include "bt_target.h"
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#include "gki.h"
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#include "btm_api.h"
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#include "btm_int.h"
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#include "rfcdefs.h"
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#include "port_api.h"
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#include "port_ext.h"
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#include "port_int.h"
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#include "rfc_int.h"
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#include "btu.h"
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#include "bt_defs.h"
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#include <string.h>
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/*******************************************************************************
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**
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** Function rfc_calc_fcs
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**
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** Description Reversed CRC Table , 8-bit, poly=0x07
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** (GSM 07.10 TS 101 369 V6.3.0)
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*******************************************************************************/
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static const UINT8 rfc_crctable[] =
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{
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0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75, 0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
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0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69, 0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
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0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D, 0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
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0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51, 0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
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0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05, 0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
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0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19, 0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
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0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D, 0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
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0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21, 0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
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0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95, 0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
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0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89, 0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
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0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD, 0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
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0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1, 0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
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0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5, 0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
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0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9, 0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
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0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD, 0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
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0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
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};
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/*******************************************************************************
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**
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** Function rfc_calc_fcs
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**
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** Description This function calculate FCS for the RFCOMM frame
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** (GSM 07.10 TS 101 369 V6.3.0)
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**
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** Input len - number of bytes in the message
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** p - points to message
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**
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*******************************************************************************/
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UINT8 rfc_calc_fcs (UINT16 len, UINT8 *p)
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{
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UINT8 fcs = 0xFF;
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while (len--)
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{
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fcs = rfc_crctable[fcs ^ *p++];
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}
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/* Ones compliment */
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return (0xFF - fcs);
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}
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/*******************************************************************************
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**
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** Function rfc_check_fcs
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**
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** Description This function checks FCS for the RFCOMM frame
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** (GSM 07.10 TS 101 369 V6.3.0)
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**
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** Input len - number of bytes in the message
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** p - points to message
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** received_fcs - received FCS
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**
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*******************************************************************************/
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BOOLEAN rfc_check_fcs (UINT16 len, UINT8 *p, UINT8 received_fcs)
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{
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UINT8 fcs = 0xFF;
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while (len--)
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{
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fcs = rfc_crctable[fcs ^ *p++];
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}
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/* Ones compliment */
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fcs = rfc_crctable[fcs ^ received_fcs];
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/*0xCF is the reversed order of 11110011.*/
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return (fcs == 0xCF);
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}
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/*******************************************************************************
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**
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** Function rfc_alloc_multiplexer_channel
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**
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** Description This function returns existing or new control block for
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** the BD_ADDR.
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**
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*******************************************************************************/
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tRFC_MCB *rfc_alloc_multiplexer_channel (BD_ADDR bd_addr, BOOLEAN is_initiator)
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{
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int i, j;
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tRFC_MCB *p_mcb = NULL;
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RFCOMM_TRACE_DEBUG("rfc_alloc_multiplexer_channel: bd_addr:%02x:%02x:%02x:%02x:%02x:%02x",
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bd_addr[0], bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5]);
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RFCOMM_TRACE_DEBUG("rfc_alloc_multiplexer_channel:is_initiator:%d", is_initiator);
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for (i = 0; i < MAX_BD_CONNECTIONS; i++)
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{
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RFCOMM_TRACE_DEBUG("rfc_alloc_multiplexer_channel rfc_cb.port.rfc_mcb[%d].state:%d",
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i, rfc_cb.port.rfc_mcb[i].state);
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RFCOMM_TRACE_DEBUG("(rfc_cb.port.rfc_mcb[i].bd_addr:%02x:%02x:%02x:%02x:%02x:%02x",
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rfc_cb.port.rfc_mcb[i].bd_addr[0], rfc_cb.port.rfc_mcb[i].bd_addr[1],
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rfc_cb.port.rfc_mcb[i].bd_addr[2], rfc_cb.port.rfc_mcb[i].bd_addr[3],
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rfc_cb.port.rfc_mcb[i].bd_addr[4], rfc_cb.port.rfc_mcb[i].bd_addr[5]);
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if ((rfc_cb.port.rfc_mcb[i].state != RFC_MX_STATE_IDLE)
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&& (!memcmp (rfc_cb.port.rfc_mcb[i].bd_addr, bd_addr, BD_ADDR_LEN)))
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{
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/* Multiplexer channel found do not change anything */
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/* If there was an inactivity timer running stop it now */
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if (rfc_cb.port.rfc_mcb[i].state == RFC_MX_STATE_CONNECTED)
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rfc_timer_stop (&rfc_cb.port.rfc_mcb[i]);
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RFCOMM_TRACE_DEBUG("rfc_alloc_multiplexer_channel:is_initiator:%d, found, state:%d, p_mcb:%p",
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is_initiator, rfc_cb.port.rfc_mcb[i].state, &rfc_cb.port.rfc_mcb[i]);
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return (&rfc_cb.port.rfc_mcb[i]);
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}
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}
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/* connection with bd_addr does not exist */
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for (i = 0, j = rfc_cb.rfc.last_mux + 1; i < MAX_BD_CONNECTIONS; i++, j++)
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{
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if (j >= MAX_BD_CONNECTIONS)
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j = 0;
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p_mcb = &rfc_cb.port.rfc_mcb[j];
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if (rfc_cb.port.rfc_mcb[j].state == RFC_MX_STATE_IDLE)
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{
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/* New multiplexer control block */
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memset (p_mcb, 0, sizeof (tRFC_MCB));
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memcpy (p_mcb->bd_addr, bd_addr, BD_ADDR_LEN);
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RFCOMM_TRACE_DEBUG("rfc_alloc_multiplexer_channel:is_initiator:%d, create new p_mcb:%p, index:%d",
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is_initiator, &rfc_cb.port.rfc_mcb[j], j);
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GKI_init_q(&p_mcb->cmd_q);
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p_mcb->is_initiator = is_initiator;
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rfc_timer_start (p_mcb, RFC_MCB_INIT_INACT_TIMER);
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rfc_cb.rfc.last_mux = (UINT8) j;
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return (p_mcb);
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}
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}
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return (NULL);
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}
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/*******************************************************************************
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**
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** Function rfc_release_multiplexer_channel
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**
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** Description This function returns existing or new control block for
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** the BD_ADDR.
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**
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*******************************************************************************/
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void rfc_release_multiplexer_channel (tRFC_MCB *p_mcb)
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{
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void *p_buf;
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rfc_timer_stop (p_mcb);
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while ((p_buf = GKI_dequeue(&p_mcb->cmd_q)) != NULL)
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GKI_freebuf(p_buf);
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memset (p_mcb, 0, sizeof (tRFC_MCB));
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p_mcb->state = RFC_MX_STATE_IDLE;
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}
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/*******************************************************************************
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**
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** Function rfc_timer_start
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**
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** Description Start RFC Timer
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**
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*******************************************************************************/
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void rfc_timer_start (tRFC_MCB *p_mcb, UINT16 timeout)
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{
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TIMER_LIST_ENT *p_tle = &p_mcb->tle;
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RFCOMM_TRACE_EVENT ("rfc_timer_start - timeout:%d", timeout);
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p_tle->param = (UINT32)p_mcb;
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btu_start_timer (p_tle, BTU_TTYPE_RFCOMM_MFC, timeout);
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}
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/*******************************************************************************
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**
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** Function rfc_timer_stop
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**
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** Description Stop RFC Timer
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**
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*******************************************************************************/
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void rfc_timer_stop (tRFC_MCB *p_mcb)
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{
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RFCOMM_TRACE_EVENT ("rfc_timer_stop");
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btu_stop_timer (&p_mcb->tle);
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}
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/*******************************************************************************
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**
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** Function rfc_port_timer_start
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**
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** Description Start RFC Timer
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**
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*******************************************************************************/
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void rfc_port_timer_start (tPORT *p_port, UINT16 timeout)
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{
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TIMER_LIST_ENT *p_tle = &p_port->rfc.tle;
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RFCOMM_TRACE_EVENT ("rfc_port_timer_start - timeout:%d", timeout);
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p_tle->param = (UINT32)p_port;
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btu_start_timer (p_tle, BTU_TTYPE_RFCOMM_PORT, timeout);
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}
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/*******************************************************************************
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**
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** Function rfc_port_timer_stop
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**
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** Description Stop RFC Timer
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**
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*******************************************************************************/
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void rfc_port_timer_stop (tPORT *p_port)
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{
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RFCOMM_TRACE_EVENT ("rfc_port_timer_stop");
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btu_stop_timer (&p_port->rfc.tle);
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}
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/*******************************************************************************
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**
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** Function rfc_check_mcb_active
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**
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** Description Check if there are any opened ports on the MCB if not
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** start MCB Inact timer.
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**
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** Returns void
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**
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*******************************************************************************/
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void rfc_check_mcb_active (tRFC_MCB *p_mcb)
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{
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UINT16 i;
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for (i = 0; i < RFCOMM_MAX_DLCI; i++)
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{
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if (p_mcb->port_inx[i] != 0)
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{
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p_mcb->is_disc_initiator = FALSE;
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return;
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}
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}
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/* The last port was DISCed. On the client side start disconnecting Mx */
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/* On the server side start inactivity timer */
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if (p_mcb->is_disc_initiator)
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{
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p_mcb->is_disc_initiator = FALSE;
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rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CLOSE_REQ, NULL);
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}
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else
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rfc_timer_start (p_mcb, RFC_MCB_RELEASE_INACT_TIMER);
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}
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/*******************************************************************************
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**
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** Function rfcomm_process_timeout
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**
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** Description The function called every second to check RFCOMM timers
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**
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** Returns void
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**
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*******************************************************************************/
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void rfcomm_process_timeout (TIMER_LIST_ENT *p_tle)
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{
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switch (p_tle->event)
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{
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case BTU_TTYPE_RFCOMM_MFC:
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rfc_mx_sm_execute ((tRFC_MCB *)p_tle->param, RFC_EVENT_TIMEOUT, NULL);
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||
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|
break;
|
||
|
|
|
||
|
|
case BTU_TTYPE_RFCOMM_PORT:
|
||
|
|
rfc_port_sm_execute ((tPORT *)p_tle->param, RFC_EVENT_TIMEOUT, NULL);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
**
|
||
|
|
** Function rfc_sec_check_complete
|
||
|
|
**
|
||
|
|
** Description The function called when Security Manager finishes
|
||
|
|
** verification of the service side connection
|
||
|
|
**
|
||
|
|
** Returns void
|
||
|
|
**
|
||
|
|
*******************************************************************************/
|
||
|
|
void rfc_sec_check_complete (BD_ADDR bd_addr, tBT_TRANSPORT transport, void *p_ref_data, UINT8 res)
|
||
|
|
{
|
||
|
|
tPORT *p_port = (tPORT *)p_ref_data;
|
||
|
|
UNUSED(bd_addr);
|
||
|
|
UNUSED(transport);
|
||
|
|
|
||
|
|
/* Verify that PORT is still waiting for Security to complete */
|
||
|
|
if (!p_port->in_use
|
||
|
|
|| ((p_port->rfc.state != RFC_STATE_ORIG_WAIT_SEC_CHECK)
|
||
|
|
&& (p_port->rfc.state != RFC_STATE_TERM_WAIT_SEC_CHECK)))
|
||
|
|
return;
|
||
|
|
|
||
|
|
rfc_port_sm_execute ((tPORT *)p_ref_data, RFC_EVENT_SEC_COMPLETE, &res);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
**
|
||
|
|
** Function rfc_port_closed
|
||
|
|
**
|
||
|
|
** Description The function is called when port is released based on the
|
||
|
|
** event received from the lower layer, typically L2CAP
|
||
|
|
** connection down, DISC, or DM frame.
|
||
|
|
**
|
||
|
|
** Returns void
|
||
|
|
**
|
||
|
|
*******************************************************************************/
|
||
|
|
void rfc_port_closed (tPORT *p_port)
|
||
|
|
{
|
||
|
|
tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
|
||
|
|
|
||
|
|
RFCOMM_TRACE_DEBUG ("rfc_port_closed");
|
||
|
|
|
||
|
|
rfc_port_timer_stop (p_port);
|
||
|
|
|
||
|
|
p_port->rfc.state = RFC_STATE_CLOSED;
|
||
|
|
|
||
|
|
/* If multiplexer channel was up mark it as down */
|
||
|
|
if (p_mcb)
|
||
|
|
{
|
||
|
|
p_mcb->port_inx[p_port->dlci] = 0;
|
||
|
|
|
||
|
|
/* If there are no more ports opened on this MCB release it */
|
||
|
|
rfc_check_mcb_active (p_mcb);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Notify port that RFC connection is gone */
|
||
|
|
port_rfc_closed (p_port, PORT_CLOSED);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
**
|
||
|
|
** Function rfc_inc_credit
|
||
|
|
**
|
||
|
|
** Description The function is called when a credit is received in a UIH
|
||
|
|
** frame. It increments the TX credit count, and if data
|
||
|
|
** flow had halted, it restarts it.
|
||
|
|
**
|
||
|
|
** Returns void
|
||
|
|
**
|
||
|
|
*******************************************************************************/
|
||
|
|
void rfc_inc_credit (tPORT *p_port, UINT8 credit)
|
||
|
|
{
|
||
|
|
if (p_port->rfc.p_mcb->flow == PORT_FC_CREDIT)
|
||
|
|
{
|
||
|
|
p_port->credit_tx += credit;
|
||
|
|
|
||
|
|
RFCOMM_TRACE_EVENT ("rfc_inc_credit:%d", p_port->credit_tx);
|
||
|
|
|
||
|
|
if (p_port->tx.peer_fc == TRUE)
|
||
|
|
PORT_FlowInd(p_port->rfc.p_mcb, p_port->dlci, TRUE);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
**
|
||
|
|
** Function rfc_dec_credit
|
||
|
|
**
|
||
|
|
** Description The function is called when a UIH frame of user data is
|
||
|
|
** sent. It decrements the credit count. If credit count
|
||
|
|
** Reaches zero, peer_fc is set.
|
||
|
|
**
|
||
|
|
** Returns void
|
||
|
|
**
|
||
|
|
*******************************************************************************/
|
||
|
|
void rfc_dec_credit (tPORT *p_port)
|
||
|
|
{
|
||
|
|
if (p_port->rfc.p_mcb->flow == PORT_FC_CREDIT)
|
||
|
|
{
|
||
|
|
if (p_port->credit_tx > 0)
|
||
|
|
p_port->credit_tx--;
|
||
|
|
|
||
|
|
if (p_port->credit_tx == 0)
|
||
|
|
p_port->tx.peer_fc = TRUE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
**
|
||
|
|
** Function rfc_check_send_cmd
|
||
|
|
**
|
||
|
|
** Description This function is called to send an RFCOMM command message
|
||
|
|
** or to handle the RFCOMM command message queue.
|
||
|
|
**
|
||
|
|
** Returns void
|
||
|
|
**
|
||
|
|
*******************************************************************************/
|
||
|
|
void rfc_check_send_cmd(tRFC_MCB *p_mcb, BT_HDR *p_buf)
|
||
|
|
{
|
||
|
|
BT_HDR *p;
|
||
|
|
|
||
|
|
/* if passed a buffer queue it */
|
||
|
|
if (p_buf != NULL)
|
||
|
|
{
|
||
|
|
GKI_enqueue(&p_mcb->cmd_q, p_buf);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* handle queue if L2CAP not congested */
|
||
|
|
while (p_mcb->l2cap_congested == FALSE)
|
||
|
|
{
|
||
|
|
if ((p = (BT_HDR *) GKI_dequeue(&p_mcb->cmd_q)) == NULL)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
L2CA_DataWrite (p_mcb->lcid, p);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|