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Dependencies:   FatFileSystem TB6612FNG2 mbed

BTstack/l2cap_signaling.c@0:de03cbbcd0ff, 2015-11-30 (annotated)

Committer:
mbed_Cookbook_SE
Date:
Mon Nov 30 09:32:15 2015 +0000
Revision:
0:de03cbbcd0ff
??

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_Cookbook_SE 0:de03cbbcd0ff 1 /*
mbed_Cookbook_SE 0:de03cbbcd0ff 2 * Copyright (C) 2009-2012 by Matthias Ringwald
mbed_Cookbook_SE 0:de03cbbcd0ff 3 *
mbed_Cookbook_SE 0:de03cbbcd0ff 4 * Redistribution and use in source and binary forms, with or without
mbed_Cookbook_SE 0:de03cbbcd0ff 5 * modification, are permitted provided that the following conditions
mbed_Cookbook_SE 0:de03cbbcd0ff 6 * are met:
mbed_Cookbook_SE 0:de03cbbcd0ff 7 *
mbed_Cookbook_SE 0:de03cbbcd0ff 8 * 1. Redistributions of source code must retain the above copyright
mbed_Cookbook_SE 0:de03cbbcd0ff 9 * notice, this list of conditions and the following disclaimer.
mbed_Cookbook_SE 0:de03cbbcd0ff 10 * 2. Redistributions in binary form must reproduce the above copyright
mbed_Cookbook_SE 0:de03cbbcd0ff 11 * notice, this list of conditions and the following disclaimer in the
mbed_Cookbook_SE 0:de03cbbcd0ff 12 * documentation and/or other materials provided with the distribution.
mbed_Cookbook_SE 0:de03cbbcd0ff 13 * 3. Neither the name of the copyright holders nor the names of
mbed_Cookbook_SE 0:de03cbbcd0ff 14 * contributors may be used to endorse or promote products derived
mbed_Cookbook_SE 0:de03cbbcd0ff 15 * from this software without specific prior written permission.
mbed_Cookbook_SE 0:de03cbbcd0ff 16 * 4. Any redistribution, use, or modification is done solely for
mbed_Cookbook_SE 0:de03cbbcd0ff 17 * personal benefit and not for any commercial purpose or for
mbed_Cookbook_SE 0:de03cbbcd0ff 18 * monetary gain.
mbed_Cookbook_SE 0:de03cbbcd0ff 19 *
mbed_Cookbook_SE 0:de03cbbcd0ff 20 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
mbed_Cookbook_SE 0:de03cbbcd0ff 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
mbed_Cookbook_SE 0:de03cbbcd0ff 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
mbed_Cookbook_SE 0:de03cbbcd0ff 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
mbed_Cookbook_SE 0:de03cbbcd0ff 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
mbed_Cookbook_SE 0:de03cbbcd0ff 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
mbed_Cookbook_SE 0:de03cbbcd0ff 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
mbed_Cookbook_SE 0:de03cbbcd0ff 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
mbed_Cookbook_SE 0:de03cbbcd0ff 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_Cookbook_SE 0:de03cbbcd0ff 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
mbed_Cookbook_SE 0:de03cbbcd0ff 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
mbed_Cookbook_SE 0:de03cbbcd0ff 31 * SUCH DAMAGE.
mbed_Cookbook_SE 0:de03cbbcd0ff 32 *
mbed_Cookbook_SE 0:de03cbbcd0ff 33 * Please inquire about commercial licensing options at btstack@ringwald.ch
mbed_Cookbook_SE 0:de03cbbcd0ff 34 *
mbed_Cookbook_SE 0:de03cbbcd0ff 35 */
mbed_Cookbook_SE 0:de03cbbcd0ff 36
mbed_Cookbook_SE 0:de03cbbcd0ff 37 /*
mbed_Cookbook_SE 0:de03cbbcd0ff 38 * l2cap_signaling.h
mbed_Cookbook_SE 0:de03cbbcd0ff 39 *
mbed_Cookbook_SE 0:de03cbbcd0ff 40 * Created by Matthias Ringwald on 7/23/09.
mbed_Cookbook_SE 0:de03cbbcd0ff 41 */
mbed_Cookbook_SE 0:de03cbbcd0ff 42
mbed_Cookbook_SE 0:de03cbbcd0ff 43 #include "l2cap_signaling.h"
mbed_Cookbook_SE 0:de03cbbcd0ff 44
mbed_Cookbook_SE 0:de03cbbcd0ff 45 #include <string.h>
mbed_Cookbook_SE 0:de03cbbcd0ff 46
mbed_Cookbook_SE 0:de03cbbcd0ff 47 static char *l2cap_signaling_commands_format[] = {
mbed_Cookbook_SE 0:de03cbbcd0ff 48 "D", // 0x01 command reject: reason {cmd not understood (0), sig MTU exceeded (2:max sig MTU), invalid CID (4:req CID)}, data len, data
mbed_Cookbook_SE 0:de03cbbcd0ff 49 "22", // 0x02 connection request: PSM, Source CID
mbed_Cookbook_SE 0:de03cbbcd0ff 50 "2222", // 0x03 connection response: Dest CID, Source CID, Result, Status
mbed_Cookbook_SE 0:de03cbbcd0ff 51 "22D", // 0x04 config request: Dest CID, Flags, Configuration options
mbed_Cookbook_SE 0:de03cbbcd0ff 52 "222D", // 0x05 config response: Source CID, Flags, Result, Configuration options
mbed_Cookbook_SE 0:de03cbbcd0ff 53 "22", // 0x06 disconection request: Dest CID, Source CID
mbed_Cookbook_SE 0:de03cbbcd0ff 54 "22", // 0x07 disconection response: Dest CID, Source CID
mbed_Cookbook_SE 0:de03cbbcd0ff 55 "D", // 0x08 echo request: Data
mbed_Cookbook_SE 0:de03cbbcd0ff 56 "D", // 0x09 echo response: Data
mbed_Cookbook_SE 0:de03cbbcd0ff 57 "2", // 0x0a information request: InfoType {1=Connectionless MTU, 2=Extended features supported}
mbed_Cookbook_SE 0:de03cbbcd0ff 58 "22D", // 0x0b information response: InfoType, Result, Data
mbed_Cookbook_SE 0:de03cbbcd0ff 59 };
mbed_Cookbook_SE 0:de03cbbcd0ff 60
mbed_Cookbook_SE 0:de03cbbcd0ff 61 uint8_t sig_seq_nr = 0xff;
mbed_Cookbook_SE 0:de03cbbcd0ff 62 uint16_t source_cid = 0x40;
mbed_Cookbook_SE 0:de03cbbcd0ff 63
mbed_Cookbook_SE 0:de03cbbcd0ff 64 uint8_t l2cap_next_sig_id(void){
mbed_Cookbook_SE 0:de03cbbcd0ff 65 if (sig_seq_nr == 0xff) {
mbed_Cookbook_SE 0:de03cbbcd0ff 66 sig_seq_nr = 1;
mbed_Cookbook_SE 0:de03cbbcd0ff 67 } else {
mbed_Cookbook_SE 0:de03cbbcd0ff 68 sig_seq_nr++;
mbed_Cookbook_SE 0:de03cbbcd0ff 69 }
mbed_Cookbook_SE 0:de03cbbcd0ff 70 return sig_seq_nr;
mbed_Cookbook_SE 0:de03cbbcd0ff 71 }
mbed_Cookbook_SE 0:de03cbbcd0ff 72
mbed_Cookbook_SE 0:de03cbbcd0ff 73 uint16_t l2cap_next_local_cid(void){
mbed_Cookbook_SE 0:de03cbbcd0ff 74 return source_cid++;
mbed_Cookbook_SE 0:de03cbbcd0ff 75 }
mbed_Cookbook_SE 0:de03cbbcd0ff 76
mbed_Cookbook_SE 0:de03cbbcd0ff 77 uint16_t l2cap_create_signaling_internal(uint8_t * acl_buffer, hci_con_handle_t handle, L2CAP_SIGNALING_COMMANDS cmd, uint8_t identifier, va_list argptr){
mbed_Cookbook_SE 0:de03cbbcd0ff 78
mbed_Cookbook_SE 0:de03cbbcd0ff 79 // 0 - Connection handle : PB=10 : BC=00
mbed_Cookbook_SE 0:de03cbbcd0ff 80 bt_store_16(acl_buffer, 0, handle | (2 << 12) | (0 << 14));
mbed_Cookbook_SE 0:de03cbbcd0ff 81 // 6 - L2CAP channel = 1
mbed_Cookbook_SE 0:de03cbbcd0ff 82 bt_store_16(acl_buffer, 6, 1);
mbed_Cookbook_SE 0:de03cbbcd0ff 83 // 8 - Code
mbed_Cookbook_SE 0:de03cbbcd0ff 84 acl_buffer[8] = cmd;
mbed_Cookbook_SE 0:de03cbbcd0ff 85 // 9 - id (!= 0 sequentially)
mbed_Cookbook_SE 0:de03cbbcd0ff 86 acl_buffer[9] = identifier;
mbed_Cookbook_SE 0:de03cbbcd0ff 87
mbed_Cookbook_SE 0:de03cbbcd0ff 88 // 12 - L2CAP signaling parameters
mbed_Cookbook_SE 0:de03cbbcd0ff 89 uint16_t pos = 12;
mbed_Cookbook_SE 0:de03cbbcd0ff 90 const char *format = l2cap_signaling_commands_format[cmd-1];
mbed_Cookbook_SE 0:de03cbbcd0ff 91 uint16_t word;
mbed_Cookbook_SE 0:de03cbbcd0ff 92 uint8_t * ptr;
mbed_Cookbook_SE 0:de03cbbcd0ff 93 while (*format) {
mbed_Cookbook_SE 0:de03cbbcd0ff 94 switch(*format) {
mbed_Cookbook_SE 0:de03cbbcd0ff 95 case '1': // 8 bit value
mbed_Cookbook_SE 0:de03cbbcd0ff 96 case '2': // 16 bit value
mbed_Cookbook_SE 0:de03cbbcd0ff 97 word = va_arg(argptr, int);
mbed_Cookbook_SE 0:de03cbbcd0ff 98 // minimal va_arg is int: 2 bytes on 8+16 bit CPUs
mbed_Cookbook_SE 0:de03cbbcd0ff 99 acl_buffer[pos++] = word & 0xff;
mbed_Cookbook_SE 0:de03cbbcd0ff 100 if (*format == '2') {
mbed_Cookbook_SE 0:de03cbbcd0ff 101 acl_buffer[pos++] = word >> 8;
mbed_Cookbook_SE 0:de03cbbcd0ff 102 }
mbed_Cookbook_SE 0:de03cbbcd0ff 103 break;
mbed_Cookbook_SE 0:de03cbbcd0ff 104 case 'D': // variable data. passed: len, ptr
mbed_Cookbook_SE 0:de03cbbcd0ff 105 word = va_arg(argptr, int);
mbed_Cookbook_SE 0:de03cbbcd0ff 106 ptr = va_arg(argptr, uint8_t *);
mbed_Cookbook_SE 0:de03cbbcd0ff 107 memcpy(&acl_buffer[pos], ptr, word);
mbed_Cookbook_SE 0:de03cbbcd0ff 108 pos += word;
mbed_Cookbook_SE 0:de03cbbcd0ff 109 break;
mbed_Cookbook_SE 0:de03cbbcd0ff 110 default:
mbed_Cookbook_SE 0:de03cbbcd0ff 111 break;
mbed_Cookbook_SE 0:de03cbbcd0ff 112 }
mbed_Cookbook_SE 0:de03cbbcd0ff 113 format++;
mbed_Cookbook_SE 0:de03cbbcd0ff 114 };
mbed_Cookbook_SE 0:de03cbbcd0ff 115 va_end(argptr);
mbed_Cookbook_SE 0:de03cbbcd0ff 116
mbed_Cookbook_SE 0:de03cbbcd0ff 117 // Fill in various length fields: it's the number of bytes following for ACL lenght and l2cap parameter length
mbed_Cookbook_SE 0:de03cbbcd0ff 118 // - the l2cap payload length is counted after the following channel id (only payload)
mbed_Cookbook_SE 0:de03cbbcd0ff 119
mbed_Cookbook_SE 0:de03cbbcd0ff 120 // 2 - ACL length
mbed_Cookbook_SE 0:de03cbbcd0ff 121 bt_store_16(acl_buffer, 2, pos - 4);
mbed_Cookbook_SE 0:de03cbbcd0ff 122 // 4 - L2CAP packet length
mbed_Cookbook_SE 0:de03cbbcd0ff 123 bt_store_16(acl_buffer, 4, pos - 6 - 2);
mbed_Cookbook_SE 0:de03cbbcd0ff 124 // 10 - L2CAP signaling parameter length
mbed_Cookbook_SE 0:de03cbbcd0ff 125 bt_store_16(acl_buffer, 10, pos - 12);
mbed_Cookbook_SE 0:de03cbbcd0ff 126
mbed_Cookbook_SE 0:de03cbbcd0ff 127 return pos;
mbed_Cookbook_SE 0:de03cbbcd0ff 128 }