Norimasa Okamoto / Mbed 2 deprecated F401RE-BTstack_example

BTstack for Nucleo F401RE/FRDM-KL46Z example program

Dependencies:   F401RE-USBHost mbed

The usage is the same as KL46Z-BTstack_example.
使い方はKL46Z-BTstack_exampleと同じです。
/media/uploads/va009039/f401re-btstack.jpg

BTstack/l2cap.c@0:a05a07cd6fdf, 2014-06-09 (annotated)

Committer:
va009039
Date:
Mon Jun 09 09:03:25 2014 +0000
Revision:
0:a05a07cd6fdf
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 0:a05a07cd6fdf 1 /*
va009039 0:a05a07cd6fdf 2 * Copyright (C) 2009-2012 by Matthias Ringwald
va009039 0:a05a07cd6fdf 3 *
va009039 0:a05a07cd6fdf 4 * Redistribution and use in source and binary forms, with or without
va009039 0:a05a07cd6fdf 5 * modification, are permitted provided that the following conditions
va009039 0:a05a07cd6fdf 6 * are met:
va009039 0:a05a07cd6fdf 7 *
va009039 0:a05a07cd6fdf 8 * 1. Redistributions of source code must retain the above copyright
va009039 0:a05a07cd6fdf 9 * notice, this list of conditions and the following disclaimer.
va009039 0:a05a07cd6fdf 10 * 2. Redistributions in binary form must reproduce the above copyright
va009039 0:a05a07cd6fdf 11 * notice, this list of conditions and the following disclaimer in the
va009039 0:a05a07cd6fdf 12 * documentation and/or other materials provided with the distribution.
va009039 0:a05a07cd6fdf 13 * 3. Neither the name of the copyright holders nor the names of
va009039 0:a05a07cd6fdf 14 * contributors may be used to endorse or promote products derived
va009039 0:a05a07cd6fdf 15 * from this software without specific prior written permission.
va009039 0:a05a07cd6fdf 16 * 4. Any redistribution, use, or modification is done solely for
va009039 0:a05a07cd6fdf 17 * personal benefit and not for any commercial purpose or for
va009039 0:a05a07cd6fdf 18 * monetary gain.
va009039 0:a05a07cd6fdf 19 *
va009039 0:a05a07cd6fdf 20 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
va009039 0:a05a07cd6fdf 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
va009039 0:a05a07cd6fdf 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
va009039 0:a05a07cd6fdf 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
va009039 0:a05a07cd6fdf 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
va009039 0:a05a07cd6fdf 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
va009039 0:a05a07cd6fdf 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
va009039 0:a05a07cd6fdf 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
va009039 0:a05a07cd6fdf 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
va009039 0:a05a07cd6fdf 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
va009039 0:a05a07cd6fdf 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
va009039 0:a05a07cd6fdf 31 * SUCH DAMAGE.
va009039 0:a05a07cd6fdf 32 *
va009039 0:a05a07cd6fdf 33 * Please inquire about commercial licensing options at btstack@ringwald.ch
va009039 0:a05a07cd6fdf 34 *
va009039 0:a05a07cd6fdf 35 */
va009039 0:a05a07cd6fdf 36
va009039 0:a05a07cd6fdf 37 /*
va009039 0:a05a07cd6fdf 38 * l2cap.c
va009039 0:a05a07cd6fdf 39 *
va009039 0:a05a07cd6fdf 40 * Logical Link Control and Adaption Protocl (L2CAP)
va009039 0:a05a07cd6fdf 41 *
va009039 0:a05a07cd6fdf 42 * Created by Matthias Ringwald on 5/16/09.
va009039 0:a05a07cd6fdf 43 */
va009039 0:a05a07cd6fdf 44
va009039 0:a05a07cd6fdf 45 #include "l2cap.h"
va009039 0:a05a07cd6fdf 46 #include "hci.h"
va009039 0:a05a07cd6fdf 47 #include "hci_dump.h"
va009039 0:a05a07cd6fdf 48 #include "debug.h"
va009039 0:a05a07cd6fdf 49 #include "btstack_memory.h"
va009039 0:a05a07cd6fdf 50
va009039 0:a05a07cd6fdf 51 #include <stdarg.h>
va009039 0:a05a07cd6fdf 52 #include <string.h>
va009039 0:a05a07cd6fdf 53
va009039 0:a05a07cd6fdf 54 #include <stdio.h>
va009039 0:a05a07cd6fdf 55
va009039 0:a05a07cd6fdf 56 // nr of buffered acl packets in outgoing queue to get max performance
va009039 0:a05a07cd6fdf 57 #define NR_BUFFERED_ACL_PACKETS 3
va009039 0:a05a07cd6fdf 58
va009039 0:a05a07cd6fdf 59 // used to cache l2cap rejects, echo, and informational requests
va009039 0:a05a07cd6fdf 60 #define NR_PENDING_SIGNALING_RESPONSES 3
va009039 0:a05a07cd6fdf 61
va009039 0:a05a07cd6fdf 62 // offsets for L2CAP SIGNALING COMMANDS
va009039 0:a05a07cd6fdf 63 #define L2CAP_SIGNALING_COMMAND_CODE_OFFSET 0
va009039 0:a05a07cd6fdf 64 #define L2CAP_SIGNALING_COMMAND_SIGID_OFFSET 1
va009039 0:a05a07cd6fdf 65 #define L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET 2
va009039 0:a05a07cd6fdf 66 #define L2CAP_SIGNALING_COMMAND_DATA_OFFSET 4
va009039 0:a05a07cd6fdf 67
va009039 0:a05a07cd6fdf 68 static void null_packet_handler(void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
va009039 0:a05a07cd6fdf 69 static void l2cap_packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size);
va009039 0:a05a07cd6fdf 70
va009039 0:a05a07cd6fdf 71 // used to cache l2cap rejects, echo, and informational requests
va009039 0:a05a07cd6fdf 72 static l2cap_signaling_response_t signaling_responses[NR_PENDING_SIGNALING_RESPONSES];
va009039 0:a05a07cd6fdf 73 static int signaling_responses_pending;
va009039 0:a05a07cd6fdf 74
va009039 0:a05a07cd6fdf 75 static linked_list_t l2cap_channels = NULL;
va009039 0:a05a07cd6fdf 76 static linked_list_t l2cap_services = NULL;
va009039 0:a05a07cd6fdf 77 static void (*packet_handler) (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) = null_packet_handler;
va009039 0:a05a07cd6fdf 78 static int new_credits_blocked = 0;
va009039 0:a05a07cd6fdf 79
va009039 0:a05a07cd6fdf 80 static btstack_packet_handler_t attribute_protocol_packet_handler = NULL;
va009039 0:a05a07cd6fdf 81 static btstack_packet_handler_t security_protocol_packet_handler = NULL;
va009039 0:a05a07cd6fdf 82
va009039 0:a05a07cd6fdf 83 // prototypes
va009039 0:a05a07cd6fdf 84 static void l2cap_finialize_channel_close(l2cap_channel_t *channel);
va009039 0:a05a07cd6fdf 85 static l2cap_service_t * l2cap_get_service(uint16_t psm);
va009039 0:a05a07cd6fdf 86 static void l2cap_emit_channel_opened(l2cap_channel_t *channel, uint8_t status);
va009039 0:a05a07cd6fdf 87 static void l2cap_emit_channel_closed(l2cap_channel_t *channel);
va009039 0:a05a07cd6fdf 88 static void l2cap_emit_connection_request(l2cap_channel_t *channel);
va009039 0:a05a07cd6fdf 89 static int l2cap_channel_ready_for_open(l2cap_channel_t *channel);
va009039 0:a05a07cd6fdf 90
va009039 0:a05a07cd6fdf 91
va009039 0:a05a07cd6fdf 92 void l2cap_init(){
va009039 0:a05a07cd6fdf 93 new_credits_blocked = 0;
va009039 0:a05a07cd6fdf 94 signaling_responses_pending = 0;
va009039 0:a05a07cd6fdf 95
va009039 0:a05a07cd6fdf 96 l2cap_channels = NULL;
va009039 0:a05a07cd6fdf 97 l2cap_services = NULL;
va009039 0:a05a07cd6fdf 98
va009039 0:a05a07cd6fdf 99 packet_handler = null_packet_handler;
va009039 0:a05a07cd6fdf 100
va009039 0:a05a07cd6fdf 101 //
va009039 0:a05a07cd6fdf 102 // register callback with HCI
va009039 0:a05a07cd6fdf 103 //
va009039 0:a05a07cd6fdf 104 hci_register_packet_handler(&l2cap_packet_handler);
va009039 0:a05a07cd6fdf 105 hci_connectable_control(0); // no services yet
va009039 0:a05a07cd6fdf 106 }
va009039 0:a05a07cd6fdf 107
va009039 0:a05a07cd6fdf 108
va009039 0:a05a07cd6fdf 109 /** Register L2CAP packet handlers */
va009039 0:a05a07cd6fdf 110 static void null_packet_handler(void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
va009039 0:a05a07cd6fdf 111 }
va009039 0:a05a07cd6fdf 112 void l2cap_register_packet_handler(void (*handler)(void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)){
va009039 0:a05a07cd6fdf 113 packet_handler = handler;
va009039 0:a05a07cd6fdf 114 }
va009039 0:a05a07cd6fdf 115
va009039 0:a05a07cd6fdf 116 // notify client/protocol handler
va009039 0:a05a07cd6fdf 117 void l2cap_dispatch(l2cap_channel_t *channel, uint8_t type, uint8_t * data, uint16_t size){
va009039 0:a05a07cd6fdf 118 if (channel->packet_handler) {
va009039 0:a05a07cd6fdf 119 (* (channel->packet_handler))(type, channel->local_cid, data, size);
va009039 0:a05a07cd6fdf 120 } else {
va009039 0:a05a07cd6fdf 121 (*packet_handler)(channel->connection, type, channel->local_cid, data, size);
va009039 0:a05a07cd6fdf 122 }
va009039 0:a05a07cd6fdf 123 }
va009039 0:a05a07cd6fdf 124
va009039 0:a05a07cd6fdf 125 void l2cap_emit_channel_opened(l2cap_channel_t *channel, uint8_t status) {
va009039 0:a05a07cd6fdf 126 uint8_t event[21];
va009039 0:a05a07cd6fdf 127 event[0] = L2CAP_EVENT_CHANNEL_OPENED;
va009039 0:a05a07cd6fdf 128 event[1] = sizeof(event) - 2;
va009039 0:a05a07cd6fdf 129 event[2] = status;
va009039 0:a05a07cd6fdf 130 bt_flip_addr(&event[3], channel->address);
va009039 0:a05a07cd6fdf 131 bt_store_16(event, 9, channel->handle);
va009039 0:a05a07cd6fdf 132 bt_store_16(event, 11, channel->psm);
va009039 0:a05a07cd6fdf 133 bt_store_16(event, 13, channel->local_cid);
va009039 0:a05a07cd6fdf 134 bt_store_16(event, 15, channel->remote_cid);
va009039 0:a05a07cd6fdf 135 bt_store_16(event, 17, channel->local_mtu);
va009039 0:a05a07cd6fdf 136 bt_store_16(event, 19, channel->remote_mtu);
va009039 0:a05a07cd6fdf 137 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
va009039 0:a05a07cd6fdf 138 l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event));
va009039 0:a05a07cd6fdf 139 }
va009039 0:a05a07cd6fdf 140
va009039 0:a05a07cd6fdf 141 void l2cap_emit_channel_closed(l2cap_channel_t *channel) {
va009039 0:a05a07cd6fdf 142 uint8_t event[4];
va009039 0:a05a07cd6fdf 143 event[0] = L2CAP_EVENT_CHANNEL_CLOSED;
va009039 0:a05a07cd6fdf 144 event[1] = sizeof(event) - 2;
va009039 0:a05a07cd6fdf 145 bt_store_16(event, 2, channel->local_cid);
va009039 0:a05a07cd6fdf 146 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
va009039 0:a05a07cd6fdf 147 l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event));
va009039 0:a05a07cd6fdf 148 }
va009039 0:a05a07cd6fdf 149
va009039 0:a05a07cd6fdf 150 void l2cap_emit_connection_request(l2cap_channel_t *channel) {
va009039 0:a05a07cd6fdf 151 uint8_t event[16];
va009039 0:a05a07cd6fdf 152 event[0] = L2CAP_EVENT_INCOMING_CONNECTION;
va009039 0:a05a07cd6fdf 153 event[1] = sizeof(event) - 2;
va009039 0:a05a07cd6fdf 154 bt_flip_addr(&event[2], channel->address);
va009039 0:a05a07cd6fdf 155 bt_store_16(event, 8, channel->handle);
va009039 0:a05a07cd6fdf 156 bt_store_16(event, 10, channel->psm);
va009039 0:a05a07cd6fdf 157 bt_store_16(event, 12, channel->local_cid);
va009039 0:a05a07cd6fdf 158 bt_store_16(event, 14, channel->remote_cid);
va009039 0:a05a07cd6fdf 159 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
va009039 0:a05a07cd6fdf 160 l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event));
va009039 0:a05a07cd6fdf 161 }
va009039 0:a05a07cd6fdf 162
va009039 0:a05a07cd6fdf 163 static void l2cap_emit_service_registered(void *connection, uint8_t status, uint16_t psm){
va009039 0:a05a07cd6fdf 164 uint8_t event[5];
va009039 0:a05a07cd6fdf 165 event[0] = L2CAP_EVENT_SERVICE_REGISTERED;
va009039 0:a05a07cd6fdf 166 event[1] = sizeof(event) - 2;
va009039 0:a05a07cd6fdf 167 event[2] = status;
va009039 0:a05a07cd6fdf 168 bt_store_16(event, 3, psm);
va009039 0:a05a07cd6fdf 169 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
va009039 0:a05a07cd6fdf 170 (*packet_handler)(connection, HCI_EVENT_PACKET, 0, event, sizeof(event));
va009039 0:a05a07cd6fdf 171 }
va009039 0:a05a07cd6fdf 172
va009039 0:a05a07cd6fdf 173 void l2cap_emit_credits(l2cap_channel_t *channel, uint8_t credits) {
va009039 0:a05a07cd6fdf 174 // track credits
va009039 0:a05a07cd6fdf 175 channel->packets_granted += credits;
va009039 0:a05a07cd6fdf 176 // log_info("l2cap_emit_credits for cid %u, credits given: %u (+%u)\n", channel->local_cid, channel->packets_granted, credits);
va009039 0:a05a07cd6fdf 177
va009039 0:a05a07cd6fdf 178 uint8_t event[5];
va009039 0:a05a07cd6fdf 179 event[0] = L2CAP_EVENT_CREDITS;
va009039 0:a05a07cd6fdf 180 event[1] = sizeof(event) - 2;
va009039 0:a05a07cd6fdf 181 bt_store_16(event, 2, channel->local_cid);
va009039 0:a05a07cd6fdf 182 event[4] = credits;
va009039 0:a05a07cd6fdf 183 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
va009039 0:a05a07cd6fdf 184 l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event));
va009039 0:a05a07cd6fdf 185 }
va009039 0:a05a07cd6fdf 186
va009039 0:a05a07cd6fdf 187 void l2cap_block_new_credits(uint8_t blocked){
va009039 0:a05a07cd6fdf 188 new_credits_blocked = blocked;
va009039 0:a05a07cd6fdf 189 }
va009039 0:a05a07cd6fdf 190
va009039 0:a05a07cd6fdf 191 void l2cap_hand_out_credits(void){
va009039 0:a05a07cd6fdf 192
va009039 0:a05a07cd6fdf 193 if (new_credits_blocked) return; // we're told not to. used by daemon
va009039 0:a05a07cd6fdf 194
va009039 0:a05a07cd6fdf 195 linked_item_t *it;
va009039 0:a05a07cd6fdf 196 for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){
va009039 0:a05a07cd6fdf 197 if (!hci_number_free_acl_slots()) return;
va009039 0:a05a07cd6fdf 198 l2cap_channel_t * channel = (l2cap_channel_t *) it;
va009039 0:a05a07cd6fdf 199 if (channel->state != L2CAP_STATE_OPEN) continue;
va009039 0:a05a07cd6fdf 200 if (hci_number_outgoing_packets(channel->handle) < NR_BUFFERED_ACL_PACKETS && channel->packets_granted == 0) {
va009039 0:a05a07cd6fdf 201 l2cap_emit_credits(channel, 1);
va009039 0:a05a07cd6fdf 202 }
va009039 0:a05a07cd6fdf 203 }
va009039 0:a05a07cd6fdf 204 }
va009039 0:a05a07cd6fdf 205
va009039 0:a05a07cd6fdf 206 l2cap_channel_t * l2cap_get_channel_for_local_cid(uint16_t local_cid){
va009039 0:a05a07cd6fdf 207 linked_item_t *it;
va009039 0:a05a07cd6fdf 208 for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){
va009039 0:a05a07cd6fdf 209 l2cap_channel_t * channel = (l2cap_channel_t *) it;
va009039 0:a05a07cd6fdf 210 if ( channel->local_cid == local_cid) {
va009039 0:a05a07cd6fdf 211 return channel;
va009039 0:a05a07cd6fdf 212 }
va009039 0:a05a07cd6fdf 213 }
va009039 0:a05a07cd6fdf 214 return NULL;
va009039 0:a05a07cd6fdf 215 }
va009039 0:a05a07cd6fdf 216
va009039 0:a05a07cd6fdf 217 int l2cap_can_send_packet_now(uint16_t local_cid){
va009039 0:a05a07cd6fdf 218 l2cap_channel_t *channel = l2cap_get_channel_for_local_cid(local_cid);
va009039 0:a05a07cd6fdf 219 if (!channel) return 0;
va009039 0:a05a07cd6fdf 220 if (!channel->packets_granted) return 0;
va009039 0:a05a07cd6fdf 221 return hci_can_send_packet_now(HCI_ACL_DATA_PACKET);
va009039 0:a05a07cd6fdf 222 }
va009039 0:a05a07cd6fdf 223
va009039 0:a05a07cd6fdf 224 uint16_t l2cap_get_remote_mtu_for_local_cid(uint16_t local_cid){
va009039 0:a05a07cd6fdf 225 l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(local_cid);
va009039 0:a05a07cd6fdf 226 if (channel) {
va009039 0:a05a07cd6fdf 227 return channel->remote_mtu;
va009039 0:a05a07cd6fdf 228 }
va009039 0:a05a07cd6fdf 229 return 0;
va009039 0:a05a07cd6fdf 230 }
va009039 0:a05a07cd6fdf 231
va009039 0:a05a07cd6fdf 232 int l2cap_send_signaling_packet(hci_con_handle_t handle, L2CAP_SIGNALING_COMMANDS cmd, uint8_t identifier, ...){
va009039 0:a05a07cd6fdf 233
va009039 0:a05a07cd6fdf 234 if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){
va009039 0:a05a07cd6fdf 235 log_info("l2cap_send_signaling_packet, cannot send\n");
va009039 0:a05a07cd6fdf 236 return BTSTACK_ACL_BUFFERS_FULL;
va009039 0:a05a07cd6fdf 237 }
va009039 0:a05a07cd6fdf 238
va009039 0:a05a07cd6fdf 239 // log_info("l2cap_send_signaling_packet type %u\n", cmd);
va009039 0:a05a07cd6fdf 240 uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer();
va009039 0:a05a07cd6fdf 241 va_list argptr;
va009039 0:a05a07cd6fdf 242 va_start(argptr, identifier);
va009039 0:a05a07cd6fdf 243 uint16_t len = l2cap_create_signaling_internal(acl_buffer, handle, cmd, identifier, argptr);
va009039 0:a05a07cd6fdf 244 va_end(argptr);
va009039 0:a05a07cd6fdf 245 // log_info("l2cap_send_signaling_packet con %u!\n", handle);
va009039 0:a05a07cd6fdf 246 return hci_send_acl_packet(acl_buffer, len);
va009039 0:a05a07cd6fdf 247 }
va009039 0:a05a07cd6fdf 248
va009039 0:a05a07cd6fdf 249 uint8_t *l2cap_get_outgoing_buffer(void){
va009039 0:a05a07cd6fdf 250 return hci_get_outgoing_acl_packet_buffer() + COMPLETE_L2CAP_HEADER; // 8 bytes
va009039 0:a05a07cd6fdf 251 }
va009039 0:a05a07cd6fdf 252
va009039 0:a05a07cd6fdf 253 int l2cap_send_prepared(uint16_t local_cid, uint16_t len){
va009039 0:a05a07cd6fdf 254
va009039 0:a05a07cd6fdf 255 if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){
va009039 0:a05a07cd6fdf 256 log_info("l2cap_send_internal cid %u, cannot send\n", local_cid);
va009039 0:a05a07cd6fdf 257 return BTSTACK_ACL_BUFFERS_FULL;
va009039 0:a05a07cd6fdf 258 }
va009039 0:a05a07cd6fdf 259
va009039 0:a05a07cd6fdf 260 l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(local_cid);
va009039 0:a05a07cd6fdf 261 if (!channel) {
va009039 0:a05a07cd6fdf 262 log_error("l2cap_send_internal no channel for cid %u\n", local_cid);
va009039 0:a05a07cd6fdf 263 return -1; // TODO: define error
va009039 0:a05a07cd6fdf 264 }
va009039 0:a05a07cd6fdf 265
va009039 0:a05a07cd6fdf 266 if (channel->packets_granted == 0){
va009039 0:a05a07cd6fdf 267 log_error("l2cap_send_internal cid %u, no credits!\n", local_cid);
va009039 0:a05a07cd6fdf 268 return -1; // TODO: define error
va009039 0:a05a07cd6fdf 269 }
va009039 0:a05a07cd6fdf 270
va009039 0:a05a07cd6fdf 271 --channel->packets_granted;
va009039 0:a05a07cd6fdf 272
va009039 0:a05a07cd6fdf 273 log_debug("l2cap_send_internal cid %u, handle %u, 1 credit used, credits left %u;\n",
va009039 0:a05a07cd6fdf 274 local_cid, channel->handle, channel->packets_granted);
va009039 0:a05a07cd6fdf 275
va009039 0:a05a07cd6fdf 276 uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer();
va009039 0:a05a07cd6fdf 277
va009039 0:a05a07cd6fdf 278 // 0 - Connection handle : PB=10 : BC=00
va009039 0:a05a07cd6fdf 279 bt_store_16(acl_buffer, 0, channel->handle | (2 << 12) | (0 << 14));
va009039 0:a05a07cd6fdf 280 // 2 - ACL length
va009039 0:a05a07cd6fdf 281 bt_store_16(acl_buffer, 2, len + 4);
va009039 0:a05a07cd6fdf 282 // 4 - L2CAP packet length
va009039 0:a05a07cd6fdf 283 bt_store_16(acl_buffer, 4, len + 0);
va009039 0:a05a07cd6fdf 284 // 6 - L2CAP channel DEST
va009039 0:a05a07cd6fdf 285 bt_store_16(acl_buffer, 6, channel->remote_cid);
va009039 0:a05a07cd6fdf 286 // send
va009039 0:a05a07cd6fdf 287 int err = hci_send_acl_packet(acl_buffer, len+8);
va009039 0:a05a07cd6fdf 288
va009039 0:a05a07cd6fdf 289 l2cap_hand_out_credits();
va009039 0:a05a07cd6fdf 290
va009039 0:a05a07cd6fdf 291 return err;
va009039 0:a05a07cd6fdf 292 }
va009039 0:a05a07cd6fdf 293
va009039 0:a05a07cd6fdf 294 int l2cap_send_prepared_connectionless(uint16_t handle, uint16_t cid, uint16_t len){
va009039 0:a05a07cd6fdf 295
va009039 0:a05a07cd6fdf 296 if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){
va009039 0:a05a07cd6fdf 297 log_info("l2cap_send_prepared_to_handle cid %u, cannot send\n", cid);
va009039 0:a05a07cd6fdf 298 return BTSTACK_ACL_BUFFERS_FULL;
va009039 0:a05a07cd6fdf 299 }
va009039 0:a05a07cd6fdf 300
va009039 0:a05a07cd6fdf 301 log_debug("l2cap_send_prepared_to_handle cid %u, handle %u\n", cid, handle);
va009039 0:a05a07cd6fdf 302
va009039 0:a05a07cd6fdf 303 uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer();
va009039 0:a05a07cd6fdf 304
va009039 0:a05a07cd6fdf 305 // 0 - Connection handle : PB=10 : BC=00
va009039 0:a05a07cd6fdf 306 bt_store_16(acl_buffer, 0, handle | (2 << 12) | (0 << 14));
va009039 0:a05a07cd6fdf 307 // 2 - ACL length
va009039 0:a05a07cd6fdf 308 bt_store_16(acl_buffer, 2, len + 4);
va009039 0:a05a07cd6fdf 309 // 4 - L2CAP packet length
va009039 0:a05a07cd6fdf 310 bt_store_16(acl_buffer, 4, len + 0);
va009039 0:a05a07cd6fdf 311 // 6 - L2CAP channel DEST
va009039 0:a05a07cd6fdf 312 bt_store_16(acl_buffer, 6, cid);
va009039 0:a05a07cd6fdf 313 // send
va009039 0:a05a07cd6fdf 314 int err = hci_send_acl_packet(acl_buffer, len+8);
va009039 0:a05a07cd6fdf 315
va009039 0:a05a07cd6fdf 316 l2cap_hand_out_credits();
va009039 0:a05a07cd6fdf 317
va009039 0:a05a07cd6fdf 318 return err;
va009039 0:a05a07cd6fdf 319 }
va009039 0:a05a07cd6fdf 320
va009039 0:a05a07cd6fdf 321 int l2cap_send_internal(uint16_t local_cid, uint8_t *data, uint16_t len){
va009039 0:a05a07cd6fdf 322
va009039 0:a05a07cd6fdf 323 if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){
va009039 0:a05a07cd6fdf 324 log_info("l2cap_send_internal cid %u, cannot send\n", local_cid);
va009039 0:a05a07cd6fdf 325 return BTSTACK_ACL_BUFFERS_FULL;
va009039 0:a05a07cd6fdf 326 }
va009039 0:a05a07cd6fdf 327
va009039 0:a05a07cd6fdf 328 uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer();
va009039 0:a05a07cd6fdf 329
va009039 0:a05a07cd6fdf 330 memcpy(&acl_buffer[8], data, len);
va009039 0:a05a07cd6fdf 331
va009039 0:a05a07cd6fdf 332 return l2cap_send_prepared(local_cid, len);
va009039 0:a05a07cd6fdf 333 }
va009039 0:a05a07cd6fdf 334
va009039 0:a05a07cd6fdf 335 int l2cap_send_connectionless(uint16_t handle, uint16_t cid, uint8_t *data, uint16_t len){
va009039 0:a05a07cd6fdf 336
va009039 0:a05a07cd6fdf 337 if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){
va009039 0:a05a07cd6fdf 338 log_info("l2cap_send_internal cid %u, cannot send\n", cid);
va009039 0:a05a07cd6fdf 339 return BTSTACK_ACL_BUFFERS_FULL;
va009039 0:a05a07cd6fdf 340 }
va009039 0:a05a07cd6fdf 341
va009039 0:a05a07cd6fdf 342 uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer();
va009039 0:a05a07cd6fdf 343
va009039 0:a05a07cd6fdf 344 memcpy(&acl_buffer[8], data, len);
va009039 0:a05a07cd6fdf 345
va009039 0:a05a07cd6fdf 346 return l2cap_send_prepared_connectionless(handle, cid, len);
va009039 0:a05a07cd6fdf 347 }
va009039 0:a05a07cd6fdf 348
va009039 0:a05a07cd6fdf 349 static inline void channelStateVarSetFlag(l2cap_channel_t *channel, L2CAP_CHANNEL_STATE_VAR flag){
va009039 0:a05a07cd6fdf 350 channel->state_var = (L2CAP_CHANNEL_STATE_VAR) (channel->state_var | flag);
va009039 0:a05a07cd6fdf 351 }
va009039 0:a05a07cd6fdf 352
va009039 0:a05a07cd6fdf 353 static inline void channelStateVarClearFlag(l2cap_channel_t *channel, L2CAP_CHANNEL_STATE_VAR flag){
va009039 0:a05a07cd6fdf 354 channel->state_var = (L2CAP_CHANNEL_STATE_VAR) (channel->state_var & ~flag);
va009039 0:a05a07cd6fdf 355 }
va009039 0:a05a07cd6fdf 356
va009039 0:a05a07cd6fdf 357
va009039 0:a05a07cd6fdf 358
va009039 0:a05a07cd6fdf 359 // MARK: L2CAP_RUN
va009039 0:a05a07cd6fdf 360 // process outstanding signaling tasks
va009039 0:a05a07cd6fdf 361 void l2cap_run(void){
va009039 0:a05a07cd6fdf 362
va009039 0:a05a07cd6fdf 363 // check pending signaling responses
va009039 0:a05a07cd6fdf 364 while (signaling_responses_pending){
va009039 0:a05a07cd6fdf 365
va009039 0:a05a07cd6fdf 366 if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)) break;
va009039 0:a05a07cd6fdf 367
va009039 0:a05a07cd6fdf 368 hci_con_handle_t handle = signaling_responses[0].handle;
va009039 0:a05a07cd6fdf 369 uint8_t sig_id = signaling_responses[0].sig_id;
va009039 0:a05a07cd6fdf 370 uint16_t infoType = signaling_responses[0].data; // INFORMATION_REQUEST
va009039 0:a05a07cd6fdf 371 uint16_t result = signaling_responses[0].data; // CONNECTION_REQUEST
va009039 0:a05a07cd6fdf 372
va009039 0:a05a07cd6fdf 373 switch (signaling_responses[0].code){
va009039 0:a05a07cd6fdf 374 case CONNECTION_REQUEST:
va009039 0:a05a07cd6fdf 375 l2cap_send_signaling_packet(handle, CONNECTION_RESPONSE, sig_id, 0, 0, result, 0);
va009039 0:a05a07cd6fdf 376 break;
va009039 0:a05a07cd6fdf 377 case ECHO_REQUEST:
va009039 0:a05a07cd6fdf 378 l2cap_send_signaling_packet(handle, ECHO_RESPONSE, sig_id, 0, NULL);
va009039 0:a05a07cd6fdf 379 break;
va009039 0:a05a07cd6fdf 380 case INFORMATION_REQUEST:
va009039 0:a05a07cd6fdf 381 if (infoType == 2) {
va009039 0:a05a07cd6fdf 382 uint32_t features = 0;
va009039 0:a05a07cd6fdf 383 // extended features request supported, however no features present
va009039 0:a05a07cd6fdf 384 l2cap_send_signaling_packet(handle, INFORMATION_RESPONSE, sig_id, infoType, 0, 4, &features);
va009039 0:a05a07cd6fdf 385 } else {
va009039 0:a05a07cd6fdf 386 // all other types are not supported
va009039 0:a05a07cd6fdf 387 l2cap_send_signaling_packet(handle, INFORMATION_RESPONSE, sig_id, infoType, 1, 0, NULL);
va009039 0:a05a07cd6fdf 388 }
va009039 0:a05a07cd6fdf 389 break;
va009039 0:a05a07cd6fdf 390 default:
va009039 0:a05a07cd6fdf 391 // should not happen
va009039 0:a05a07cd6fdf 392 break;
va009039 0:a05a07cd6fdf 393 }
va009039 0:a05a07cd6fdf 394
va009039 0:a05a07cd6fdf 395 // remove first item
va009039 0:a05a07cd6fdf 396 signaling_responses_pending--;
va009039 0:a05a07cd6fdf 397 int i;
va009039 0:a05a07cd6fdf 398 for (i=0; i < signaling_responses_pending; i++){
va009039 0:a05a07cd6fdf 399 memcpy(&signaling_responses[i], &signaling_responses[i+1], sizeof(l2cap_signaling_response_t));
va009039 0:a05a07cd6fdf 400 }
va009039 0:a05a07cd6fdf 401 }
va009039 0:a05a07cd6fdf 402
va009039 0:a05a07cd6fdf 403 uint8_t config_options[4];
va009039 0:a05a07cd6fdf 404 linked_item_t *it;
va009039 0:a05a07cd6fdf 405 linked_item_t *next;
va009039 0:a05a07cd6fdf 406 for (it = (linked_item_t *) l2cap_channels; it ; it = next){
va009039 0:a05a07cd6fdf 407 next = it->next; // cache next item as current item might get freed
va009039 0:a05a07cd6fdf 408
va009039 0:a05a07cd6fdf 409 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) break;
va009039 0:a05a07cd6fdf 410 if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)) break;
va009039 0:a05a07cd6fdf 411
va009039 0:a05a07cd6fdf 412 l2cap_channel_t * channel = (l2cap_channel_t *) it;
va009039 0:a05a07cd6fdf 413
va009039 0:a05a07cd6fdf 414 // log_info("l2cap_run: state %u, var 0x%02x\n", channel->state, channel->state_var);
va009039 0:a05a07cd6fdf 415
va009039 0:a05a07cd6fdf 416
va009039 0:a05a07cd6fdf 417 switch (channel->state){
va009039 0:a05a07cd6fdf 418
va009039 0:a05a07cd6fdf 419 case L2CAP_STATE_WILL_SEND_CREATE_CONNECTION:
va009039 0:a05a07cd6fdf 420 // send connection request - set state first
va009039 0:a05a07cd6fdf 421 channel->state = L2CAP_STATE_WAIT_CONNECTION_COMPLETE;
va009039 0:a05a07cd6fdf 422 // BD_ADDR, Packet_Type, Page_Scan_Repetition_Mode, Reserved, Clock_Offset, Allow_Role_Switch
va009039 0:a05a07cd6fdf 423 hci_send_cmd(&hci_create_connection, channel->address, hci_usable_acl_packet_types(), 0, 0, 0, 1);
va009039 0:a05a07cd6fdf 424 break;
va009039 0:a05a07cd6fdf 425
va009039 0:a05a07cd6fdf 426 case L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_DECLINE:
va009039 0:a05a07cd6fdf 427 l2cap_send_signaling_packet(channel->handle, CONNECTION_RESPONSE, channel->remote_sig_id, 0, 0, channel->reason, 0);
va009039 0:a05a07cd6fdf 428 // discard channel - l2cap_finialize_channel_close without sending l2cap close event
va009039 0:a05a07cd6fdf 429 linked_list_remove(&l2cap_channels, (linked_item_t *) channel); // -- remove from list
va009039 0:a05a07cd6fdf 430 btstack_memory_l2cap_channel_free(channel);
va009039 0:a05a07cd6fdf 431 break;
va009039 0:a05a07cd6fdf 432
va009039 0:a05a07cd6fdf 433 case L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_ACCEPT:
va009039 0:a05a07cd6fdf 434 channel->state = L2CAP_STATE_CONFIG;
va009039 0:a05a07cd6fdf 435 channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ);
va009039 0:a05a07cd6fdf 436 l2cap_send_signaling_packet(channel->handle, CONNECTION_RESPONSE, channel->remote_sig_id, channel->local_cid, channel->remote_cid, 0, 0);
va009039 0:a05a07cd6fdf 437 break;
va009039 0:a05a07cd6fdf 438
va009039 0:a05a07cd6fdf 439 case L2CAP_STATE_WILL_SEND_CONNECTION_REQUEST:
va009039 0:a05a07cd6fdf 440 // success, start l2cap handshake
va009039 0:a05a07cd6fdf 441 channel->local_sig_id = l2cap_next_sig_id();
va009039 0:a05a07cd6fdf 442 channel->state = L2CAP_STATE_WAIT_CONNECT_RSP;
va009039 0:a05a07cd6fdf 443 l2cap_send_signaling_packet( channel->handle, CONNECTION_REQUEST, channel->local_sig_id, channel->psm, channel->local_cid);
va009039 0:a05a07cd6fdf 444 break;
va009039 0:a05a07cd6fdf 445
va009039 0:a05a07cd6fdf 446 case L2CAP_STATE_CONFIG:
va009039 0:a05a07cd6fdf 447 if (channel->state_var & L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP){
va009039 0:a05a07cd6fdf 448 channelStateVarClearFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP);
va009039 0:a05a07cd6fdf 449 channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SENT_CONF_RSP);
va009039 0:a05a07cd6fdf 450 l2cap_send_signaling_packet(channel->handle, CONFIGURE_RESPONSE, channel->remote_sig_id, channel->remote_cid, 0, 0, 0, NULL);
va009039 0:a05a07cd6fdf 451 }
va009039 0:a05a07cd6fdf 452 else if (channel->state_var & L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ){
va009039 0:a05a07cd6fdf 453 channelStateVarClearFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ);
va009039 0:a05a07cd6fdf 454 channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SENT_CONF_REQ);
va009039 0:a05a07cd6fdf 455 channel->local_sig_id = l2cap_next_sig_id();
va009039 0:a05a07cd6fdf 456 config_options[0] = 1; // MTU
va009039 0:a05a07cd6fdf 457 config_options[1] = 2; // len param
va009039 0:a05a07cd6fdf 458 bt_store_16( (uint8_t*)&config_options, 2, channel->local_mtu);
va009039 0:a05a07cd6fdf 459 l2cap_send_signaling_packet(channel->handle, CONFIGURE_REQUEST, channel->local_sig_id, channel->remote_cid, 0, 4, &config_options);
va009039 0:a05a07cd6fdf 460 }
va009039 0:a05a07cd6fdf 461 if (l2cap_channel_ready_for_open(channel)){
va009039 0:a05a07cd6fdf 462 channel->state = L2CAP_STATE_OPEN;
va009039 0:a05a07cd6fdf 463 l2cap_emit_channel_opened(channel, 0); // success
va009039 0:a05a07cd6fdf 464 l2cap_emit_credits(channel, 1);
va009039 0:a05a07cd6fdf 465 }
va009039 0:a05a07cd6fdf 466 break;
va009039 0:a05a07cd6fdf 467
va009039 0:a05a07cd6fdf 468 case L2CAP_STATE_WILL_SEND_DISCONNECT_RESPONSE:
va009039 0:a05a07cd6fdf 469 l2cap_send_signaling_packet( channel->handle, DISCONNECTION_RESPONSE, channel->remote_sig_id, channel->local_cid, channel->remote_cid);
va009039 0:a05a07cd6fdf 470 l2cap_finialize_channel_close(channel); // -- remove from list
va009039 0:a05a07cd6fdf 471 break;
va009039 0:a05a07cd6fdf 472
va009039 0:a05a07cd6fdf 473 case L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST:
va009039 0:a05a07cd6fdf 474 channel->local_sig_id = l2cap_next_sig_id();
va009039 0:a05a07cd6fdf 475 channel->state = L2CAP_STATE_WAIT_DISCONNECT;
va009039 0:a05a07cd6fdf 476 l2cap_send_signaling_packet( channel->handle, DISCONNECTION_REQUEST, channel->local_sig_id, channel->remote_cid, channel->local_cid);
va009039 0:a05a07cd6fdf 477 break;
va009039 0:a05a07cd6fdf 478 default:
va009039 0:a05a07cd6fdf 479 break;
va009039 0:a05a07cd6fdf 480 }
va009039 0:a05a07cd6fdf 481 }
va009039 0:a05a07cd6fdf 482 }
va009039 0:a05a07cd6fdf 483
va009039 0:a05a07cd6fdf 484 uint16_t l2cap_max_mtu(void){
va009039 0:a05a07cd6fdf 485 return hci_max_acl_data_packet_length() - L2CAP_HEADER_SIZE;
va009039 0:a05a07cd6fdf 486 }
va009039 0:a05a07cd6fdf 487
va009039 0:a05a07cd6fdf 488 // open outgoing L2CAP channel
va009039 0:a05a07cd6fdf 489 void l2cap_create_channel_internal(void * connection, btstack_packet_handler_t packet_handler,
va009039 0:a05a07cd6fdf 490 bd_addr_t address, uint16_t psm, uint16_t mtu){
va009039 0:a05a07cd6fdf 491
va009039 0:a05a07cd6fdf 492 // alloc structure
va009039 0:a05a07cd6fdf 493 l2cap_channel_t * chan = (l2cap_channel_t*) btstack_memory_l2cap_channel_get();
va009039 0:a05a07cd6fdf 494 if (!chan) {
va009039 0:a05a07cd6fdf 495 // emit error event
va009039 0:a05a07cd6fdf 496 l2cap_channel_t dummy_channel;
va009039 0:a05a07cd6fdf 497 BD_ADDR_COPY(dummy_channel.address, address);
va009039 0:a05a07cd6fdf 498 dummy_channel.psm = psm;
va009039 0:a05a07cd6fdf 499 l2cap_emit_channel_opened(&dummy_channel, BTSTACK_MEMORY_ALLOC_FAILED);
va009039 0:a05a07cd6fdf 500 return;
va009039 0:a05a07cd6fdf 501 }
va009039 0:a05a07cd6fdf 502 // limit local mtu to max acl packet length
va009039 0:a05a07cd6fdf 503 if (mtu > l2cap_max_mtu()) {
va009039 0:a05a07cd6fdf 504 mtu = l2cap_max_mtu();
va009039 0:a05a07cd6fdf 505 }
va009039 0:a05a07cd6fdf 506
va009039 0:a05a07cd6fdf 507 // fill in
va009039 0:a05a07cd6fdf 508 BD_ADDR_COPY(chan->address, address);
va009039 0:a05a07cd6fdf 509 chan->psm = psm;
va009039 0:a05a07cd6fdf 510 chan->handle = 0;
va009039 0:a05a07cd6fdf 511 chan->connection = connection;
va009039 0:a05a07cd6fdf 512 chan->packet_handler = packet_handler;
va009039 0:a05a07cd6fdf 513 chan->remote_mtu = L2CAP_MINIMAL_MTU;
va009039 0:a05a07cd6fdf 514 chan->local_mtu = mtu;
va009039 0:a05a07cd6fdf 515 chan->packets_granted = 0;
va009039 0:a05a07cd6fdf 516
va009039 0:a05a07cd6fdf 517 // set initial state
va009039 0:a05a07cd6fdf 518 chan->state = L2CAP_STATE_WILL_SEND_CREATE_CONNECTION;
va009039 0:a05a07cd6fdf 519 chan->state_var = L2CAP_CHANNEL_STATE_VAR_NONE;
va009039 0:a05a07cd6fdf 520 chan->remote_sig_id = L2CAP_SIG_ID_INVALID;
va009039 0:a05a07cd6fdf 521 chan->local_sig_id = L2CAP_SIG_ID_INVALID;
va009039 0:a05a07cd6fdf 522
va009039 0:a05a07cd6fdf 523 // add to connections list
va009039 0:a05a07cd6fdf 524 linked_list_add(&l2cap_channels, (linked_item_t *) chan);
va009039 0:a05a07cd6fdf 525
va009039 0:a05a07cd6fdf 526 l2cap_run();
va009039 0:a05a07cd6fdf 527 }
va009039 0:a05a07cd6fdf 528
va009039 0:a05a07cd6fdf 529 void l2cap_disconnect_internal(uint16_t local_cid, uint8_t reason){
va009039 0:a05a07cd6fdf 530 // find channel for local_cid
va009039 0:a05a07cd6fdf 531 l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(local_cid);
va009039 0:a05a07cd6fdf 532 if (channel) {
va009039 0:a05a07cd6fdf 533 channel->state = L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST;
va009039 0:a05a07cd6fdf 534 }
va009039 0:a05a07cd6fdf 535 // process
va009039 0:a05a07cd6fdf 536 l2cap_run();
va009039 0:a05a07cd6fdf 537 }
va009039 0:a05a07cd6fdf 538
va009039 0:a05a07cd6fdf 539 static void l2cap_handle_connection_failed_for_addr(bd_addr_t address, uint8_t status){
va009039 0:a05a07cd6fdf 540 linked_item_t *it = (linked_item_t *) &l2cap_channels;
va009039 0:a05a07cd6fdf 541 while (it->next){
va009039 0:a05a07cd6fdf 542 l2cap_channel_t * channel = (l2cap_channel_t *) it->next;
va009039 0:a05a07cd6fdf 543 if ( ! BD_ADDR_CMP( channel->address, address) ){
va009039 0:a05a07cd6fdf 544 if (channel->state == L2CAP_STATE_WAIT_CONNECTION_COMPLETE || channel->state == L2CAP_STATE_WILL_SEND_CREATE_CONNECTION) {
va009039 0:a05a07cd6fdf 545 // failure, forward error code
va009039 0:a05a07cd6fdf 546 l2cap_emit_channel_opened(channel, status);
va009039 0:a05a07cd6fdf 547 // discard channel
va009039 0:a05a07cd6fdf 548 it->next = it->next->next;
va009039 0:a05a07cd6fdf 549 btstack_memory_l2cap_channel_free(channel);
va009039 0:a05a07cd6fdf 550 }
va009039 0:a05a07cd6fdf 551 } else {
va009039 0:a05a07cd6fdf 552 it = it->next;
va009039 0:a05a07cd6fdf 553 }
va009039 0:a05a07cd6fdf 554 }
va009039 0:a05a07cd6fdf 555 }
va009039 0:a05a07cd6fdf 556
va009039 0:a05a07cd6fdf 557 static void l2cap_handle_connection_success_for_addr(bd_addr_t address, hci_con_handle_t handle){
va009039 0:a05a07cd6fdf 558 linked_item_t *it;
va009039 0:a05a07cd6fdf 559 for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){
va009039 0:a05a07cd6fdf 560 l2cap_channel_t * channel = (l2cap_channel_t *) it;
va009039 0:a05a07cd6fdf 561 if ( ! BD_ADDR_CMP( channel->address, address) ){
va009039 0:a05a07cd6fdf 562 if (channel->state == L2CAP_STATE_WAIT_CONNECTION_COMPLETE || channel->state == L2CAP_STATE_WILL_SEND_CREATE_CONNECTION) {
va009039 0:a05a07cd6fdf 563 // success, start l2cap handshake
va009039 0:a05a07cd6fdf 564 channel->state = L2CAP_STATE_WILL_SEND_CONNECTION_REQUEST;
va009039 0:a05a07cd6fdf 565 channel->handle = handle;
va009039 0:a05a07cd6fdf 566 channel->local_cid = l2cap_next_local_cid();
va009039 0:a05a07cd6fdf 567 }
va009039 0:a05a07cd6fdf 568 }
va009039 0:a05a07cd6fdf 569 }
va009039 0:a05a07cd6fdf 570 // process
va009039 0:a05a07cd6fdf 571 l2cap_run();
va009039 0:a05a07cd6fdf 572 }
va009039 0:a05a07cd6fdf 573
va009039 0:a05a07cd6fdf 574 void l2cap_event_handler( uint8_t *packet, uint16_t size ){
va009039 0:a05a07cd6fdf 575
va009039 0:a05a07cd6fdf 576 bd_addr_t address;
va009039 0:a05a07cd6fdf 577 hci_con_handle_t handle;
va009039 0:a05a07cd6fdf 578 l2cap_channel_t * channel;
va009039 0:a05a07cd6fdf 579 linked_item_t *it;
va009039 0:a05a07cd6fdf 580 int hci_con_used;
va009039 0:a05a07cd6fdf 581
va009039 0:a05a07cd6fdf 582 switch(packet[0]){
va009039 0:a05a07cd6fdf 583
va009039 0:a05a07cd6fdf 584 // handle connection complete events
va009039 0:a05a07cd6fdf 585 case HCI_EVENT_CONNECTION_COMPLETE:
va009039 0:a05a07cd6fdf 586 bt_flip_addr(address, &packet[5]);
va009039 0:a05a07cd6fdf 587 if (packet[2] == 0){
va009039 0:a05a07cd6fdf 588 handle = READ_BT_16(packet, 3);
va009039 0:a05a07cd6fdf 589 l2cap_handle_connection_success_for_addr(address, handle);
va009039 0:a05a07cd6fdf 590 } else {
va009039 0:a05a07cd6fdf 591 l2cap_handle_connection_failed_for_addr(address, packet[2]);
va009039 0:a05a07cd6fdf 592 }
va009039 0:a05a07cd6fdf 593 break;
va009039 0:a05a07cd6fdf 594
va009039 0:a05a07cd6fdf 595 // handle successful create connection cancel command
va009039 0:a05a07cd6fdf 596 case HCI_EVENT_COMMAND_COMPLETE:
va009039 0:a05a07cd6fdf 597 if ( COMMAND_COMPLETE_EVENT(packet, hci_create_connection_cancel) ) {
va009039 0:a05a07cd6fdf 598 if (packet[5] == 0){
va009039 0:a05a07cd6fdf 599 bt_flip_addr(address, &packet[6]);
va009039 0:a05a07cd6fdf 600 // CONNECTION TERMINATED BY LOCAL HOST (0X16)
va009039 0:a05a07cd6fdf 601 l2cap_handle_connection_failed_for_addr(address, 0x16);
va009039 0:a05a07cd6fdf 602 }
va009039 0:a05a07cd6fdf 603 }
va009039 0:a05a07cd6fdf 604 l2cap_run(); // try sending signaling packets first
va009039 0:a05a07cd6fdf 605 break;
va009039 0:a05a07cd6fdf 606
va009039 0:a05a07cd6fdf 607 case HCI_EVENT_COMMAND_STATUS:
va009039 0:a05a07cd6fdf 608 l2cap_run(); // try sending signaling packets first
va009039 0:a05a07cd6fdf 609 break;
va009039 0:a05a07cd6fdf 610
va009039 0:a05a07cd6fdf 611 // handle disconnection complete events
va009039 0:a05a07cd6fdf 612 case HCI_EVENT_DISCONNECTION_COMPLETE:
va009039 0:a05a07cd6fdf 613 // send l2cap disconnect events for all channels on this handle
va009039 0:a05a07cd6fdf 614 handle = READ_BT_16(packet, 3);
va009039 0:a05a07cd6fdf 615 it = (linked_item_t *) &l2cap_channels;
va009039 0:a05a07cd6fdf 616 while (it->next){
va009039 0:a05a07cd6fdf 617 l2cap_channel_t * channel = (l2cap_channel_t *) it->next;
va009039 0:a05a07cd6fdf 618 if ( channel->handle == handle ){
va009039 0:a05a07cd6fdf 619 // update prev item before free'ing next element - don't call l2cap_finalize_channel_close
va009039 0:a05a07cd6fdf 620 it->next = it->next->next;
va009039 0:a05a07cd6fdf 621 l2cap_emit_channel_closed(channel);
va009039 0:a05a07cd6fdf 622 btstack_memory_l2cap_channel_free(channel);
va009039 0:a05a07cd6fdf 623 } else {
va009039 0:a05a07cd6fdf 624 it = it->next;
va009039 0:a05a07cd6fdf 625 }
va009039 0:a05a07cd6fdf 626 }
va009039 0:a05a07cd6fdf 627 break;
va009039 0:a05a07cd6fdf 628
va009039 0:a05a07cd6fdf 629 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:
va009039 0:a05a07cd6fdf 630 l2cap_run(); // try sending signaling packets first
va009039 0:a05a07cd6fdf 631 l2cap_hand_out_credits();
va009039 0:a05a07cd6fdf 632 break;
va009039 0:a05a07cd6fdf 633
va009039 0:a05a07cd6fdf 634 // HCI Connection Timeouts
va009039 0:a05a07cd6fdf 635 case L2CAP_EVENT_TIMEOUT_CHECK:
va009039 0:a05a07cd6fdf 636 handle = READ_BT_16(packet, 2);
va009039 0:a05a07cd6fdf 637 if (hci_authentication_active_for_handle(handle)) break;
va009039 0:a05a07cd6fdf 638 hci_con_used = 0;
va009039 0:a05a07cd6fdf 639 for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){
va009039 0:a05a07cd6fdf 640 channel = (l2cap_channel_t *) it;
va009039 0:a05a07cd6fdf 641 if (channel->handle == handle) {
va009039 0:a05a07cd6fdf 642 hci_con_used = 1;
va009039 0:a05a07cd6fdf 643 }
va009039 0:a05a07cd6fdf 644 }
va009039 0:a05a07cd6fdf 645 if (hci_con_used) break;
va009039 0:a05a07cd6fdf 646 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) break;
va009039 0:a05a07cd6fdf 647 hci_send_cmd(&hci_disconnect, handle, 0x13); // remote closed connection
va009039 0:a05a07cd6fdf 648 break;
va009039 0:a05a07cd6fdf 649
va009039 0:a05a07cd6fdf 650 case DAEMON_EVENT_HCI_PACKET_SENT:
va009039 0:a05a07cd6fdf 651 for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){
va009039 0:a05a07cd6fdf 652 channel = (l2cap_channel_t *) it;
va009039 0:a05a07cd6fdf 653 if (channel->packet_handler) {
va009039 0:a05a07cd6fdf 654 (* (channel->packet_handler))(HCI_EVENT_PACKET, channel->local_cid, packet, size);
va009039 0:a05a07cd6fdf 655 }
va009039 0:a05a07cd6fdf 656 }
va009039 0:a05a07cd6fdf 657 if (attribute_protocol_packet_handler) {
va009039 0:a05a07cd6fdf 658 (*attribute_protocol_packet_handler)(HCI_EVENT_PACKET, 0, packet, size);
va009039 0:a05a07cd6fdf 659 }
va009039 0:a05a07cd6fdf 660 if (security_protocol_packet_handler) {
va009039 0:a05a07cd6fdf 661 (*security_protocol_packet_handler)(HCI_EVENT_PACKET, 0, packet, size);
va009039 0:a05a07cd6fdf 662 }
va009039 0:a05a07cd6fdf 663 break;
va009039 0:a05a07cd6fdf 664
va009039 0:a05a07cd6fdf 665 default:
va009039 0:a05a07cd6fdf 666 break;
va009039 0:a05a07cd6fdf 667 }
va009039 0:a05a07cd6fdf 668
va009039 0:a05a07cd6fdf 669 // pass on
va009039 0:a05a07cd6fdf 670 (*packet_handler)(NULL, HCI_EVENT_PACKET, 0, packet, size);
va009039 0:a05a07cd6fdf 671 }
va009039 0:a05a07cd6fdf 672
va009039 0:a05a07cd6fdf 673 static void l2cap_handle_disconnect_request(l2cap_channel_t *channel, uint16_t identifier){
va009039 0:a05a07cd6fdf 674 channel->remote_sig_id = identifier;
va009039 0:a05a07cd6fdf 675 channel->state = L2CAP_STATE_WILL_SEND_DISCONNECT_RESPONSE;
va009039 0:a05a07cd6fdf 676 l2cap_run();
va009039 0:a05a07cd6fdf 677 }
va009039 0:a05a07cd6fdf 678
va009039 0:a05a07cd6fdf 679 static void l2cap_register_signaling_response(hci_con_handle_t handle, uint8_t code, uint8_t sig_id, uint16_t data){
va009039 0:a05a07cd6fdf 680 // Vol 3, Part A, 4.3: "The DCID and SCID fields shall be ignored when the result field indi- cates the connection was refused."
va009039 0:a05a07cd6fdf 681 if (signaling_responses_pending < NR_PENDING_SIGNALING_RESPONSES) {
va009039 0:a05a07cd6fdf 682 signaling_responses[signaling_responses_pending].handle = handle;
va009039 0:a05a07cd6fdf 683 signaling_responses[signaling_responses_pending].code = code;
va009039 0:a05a07cd6fdf 684 signaling_responses[signaling_responses_pending].sig_id = sig_id;
va009039 0:a05a07cd6fdf 685 signaling_responses[signaling_responses_pending].data = data;
va009039 0:a05a07cd6fdf 686 signaling_responses_pending++;
va009039 0:a05a07cd6fdf 687 l2cap_run();
va009039 0:a05a07cd6fdf 688 }
va009039 0:a05a07cd6fdf 689 }
va009039 0:a05a07cd6fdf 690
va009039 0:a05a07cd6fdf 691 static void l2cap_handle_connection_request(hci_con_handle_t handle, uint8_t sig_id, uint16_t psm, uint16_t source_cid){
va009039 0:a05a07cd6fdf 692
va009039 0:a05a07cd6fdf 693 // log_info("l2cap_handle_connection_request for handle %u, psm %u cid %u\n", handle, psm, source_cid);
va009039 0:a05a07cd6fdf 694 l2cap_service_t *service = l2cap_get_service(psm);
va009039 0:a05a07cd6fdf 695 if (!service) {
va009039 0:a05a07cd6fdf 696 // 0x0002 PSM not supported
va009039 0:a05a07cd6fdf 697 l2cap_register_signaling_response(handle, CONNECTION_REQUEST, sig_id, 0x0002);
va009039 0:a05a07cd6fdf 698 return;
va009039 0:a05a07cd6fdf 699 }
va009039 0:a05a07cd6fdf 700
va009039 0:a05a07cd6fdf 701 hci_connection_t * hci_connection = connection_for_handle( handle );
va009039 0:a05a07cd6fdf 702 if (!hci_connection) {
va009039 0:a05a07cd6fdf 703 //
va009039 0:a05a07cd6fdf 704 log_error("no hci_connection for handle %u\n", handle);
va009039 0:a05a07cd6fdf 705 return;
va009039 0:a05a07cd6fdf 706 }
va009039 0:a05a07cd6fdf 707 // alloc structure
va009039 0:a05a07cd6fdf 708 // log_info("l2cap_handle_connection_request register channel\n");
va009039 0:a05a07cd6fdf 709 l2cap_channel_t * channel = (l2cap_channel_t*) btstack_memory_l2cap_channel_get();
va009039 0:a05a07cd6fdf 710 if (!channel){
va009039 0:a05a07cd6fdf 711 // 0x0004 No resources available
va009039 0:a05a07cd6fdf 712 l2cap_register_signaling_response(handle, CONNECTION_REQUEST, sig_id, 0x0004);
va009039 0:a05a07cd6fdf 713 return;
va009039 0:a05a07cd6fdf 714 }
va009039 0:a05a07cd6fdf 715
va009039 0:a05a07cd6fdf 716 // fill in
va009039 0:a05a07cd6fdf 717 BD_ADDR_COPY(channel->address, hci_connection->address);
va009039 0:a05a07cd6fdf 718 channel->psm = psm;
va009039 0:a05a07cd6fdf 719 channel->handle = handle;
va009039 0:a05a07cd6fdf 720 channel->connection = service->connection;
va009039 0:a05a07cd6fdf 721 channel->packet_handler = service->packet_handler;
va009039 0:a05a07cd6fdf 722 channel->local_cid = l2cap_next_local_cid();
va009039 0:a05a07cd6fdf 723 channel->remote_cid = source_cid;
va009039 0:a05a07cd6fdf 724 channel->local_mtu = service->mtu;
va009039 0:a05a07cd6fdf 725 channel->remote_mtu = L2CAP_DEFAULT_MTU;
va009039 0:a05a07cd6fdf 726 channel->packets_granted = 0;
va009039 0:a05a07cd6fdf 727 channel->remote_sig_id = sig_id;
va009039 0:a05a07cd6fdf 728
va009039 0:a05a07cd6fdf 729 // limit local mtu to max acl packet length
va009039 0:a05a07cd6fdf 730 if (channel->local_mtu > l2cap_max_mtu()) {
va009039 0:a05a07cd6fdf 731 channel->local_mtu = l2cap_max_mtu();
va009039 0:a05a07cd6fdf 732 }
va009039 0:a05a07cd6fdf 733
va009039 0:a05a07cd6fdf 734 // set initial state
va009039 0:a05a07cd6fdf 735 channel->state = L2CAP_STATE_WAIT_CLIENT_ACCEPT_OR_REJECT;
va009039 0:a05a07cd6fdf 736 channel->state_var = L2CAP_CHANNEL_STATE_VAR_NONE;
va009039 0:a05a07cd6fdf 737
va009039 0:a05a07cd6fdf 738 // add to connections list
va009039 0:a05a07cd6fdf 739 linked_list_add(&l2cap_channels, (linked_item_t *) channel);
va009039 0:a05a07cd6fdf 740
va009039 0:a05a07cd6fdf 741 // emit incoming connection request
va009039 0:a05a07cd6fdf 742 l2cap_emit_connection_request(channel);
va009039 0:a05a07cd6fdf 743 }
va009039 0:a05a07cd6fdf 744
va009039 0:a05a07cd6fdf 745 void l2cap_accept_connection_internal(uint16_t local_cid){
va009039 0:a05a07cd6fdf 746 l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(local_cid);
va009039 0:a05a07cd6fdf 747 if (!channel) {
va009039 0:a05a07cd6fdf 748 log_error("l2cap_accept_connection_internal called but local_cid 0x%x not found", local_cid);
va009039 0:a05a07cd6fdf 749 return;
va009039 0:a05a07cd6fdf 750 }
va009039 0:a05a07cd6fdf 751
va009039 0:a05a07cd6fdf 752 channel->state = L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_ACCEPT;
va009039 0:a05a07cd6fdf 753
va009039 0:a05a07cd6fdf 754 // process
va009039 0:a05a07cd6fdf 755 l2cap_run();
va009039 0:a05a07cd6fdf 756 }
va009039 0:a05a07cd6fdf 757
va009039 0:a05a07cd6fdf 758 void l2cap_decline_connection_internal(uint16_t local_cid, uint8_t reason){
va009039 0:a05a07cd6fdf 759 l2cap_channel_t * channel = l2cap_get_channel_for_local_cid( local_cid);
va009039 0:a05a07cd6fdf 760 if (!channel) {
va009039 0:a05a07cd6fdf 761 log_error( "l2cap_decline_connection_internal called but local_cid 0x%x not found", local_cid);
va009039 0:a05a07cd6fdf 762 return;
va009039 0:a05a07cd6fdf 763 }
va009039 0:a05a07cd6fdf 764 channel->state = L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_DECLINE;
va009039 0:a05a07cd6fdf 765 channel->reason = reason;
va009039 0:a05a07cd6fdf 766 l2cap_run();
va009039 0:a05a07cd6fdf 767 }
va009039 0:a05a07cd6fdf 768
va009039 0:a05a07cd6fdf 769 void l2cap_signaling_handle_configure_request(l2cap_channel_t *channel, uint8_t *command){
va009039 0:a05a07cd6fdf 770
va009039 0:a05a07cd6fdf 771 channel->remote_sig_id = command[L2CAP_SIGNALING_COMMAND_SIGID_OFFSET];
va009039 0:a05a07cd6fdf 772
va009039 0:a05a07cd6fdf 773 // accept the other's configuration options
va009039 0:a05a07cd6fdf 774 uint16_t end_pos = 4 + READ_BT_16(command, L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET);
va009039 0:a05a07cd6fdf 775 uint16_t pos = 8;
va009039 0:a05a07cd6fdf 776 while (pos < end_pos){
va009039 0:a05a07cd6fdf 777 uint8_t type = command[pos++];
va009039 0:a05a07cd6fdf 778 uint8_t length = command[pos++];
va009039 0:a05a07cd6fdf 779 // MTU { type(8): 1, len(8):2, MTU(16) }
va009039 0:a05a07cd6fdf 780 if ((type & 0x7f) == 1 && length == 2){
va009039 0:a05a07cd6fdf 781 channel->remote_mtu = READ_BT_16(command, pos);
va009039 0:a05a07cd6fdf 782 // log_info("l2cap cid %u, remote mtu %u\n", channel->local_cid, channel->remote_mtu);
va009039 0:a05a07cd6fdf 783 }
va009039 0:a05a07cd6fdf 784 pos += length;
va009039 0:a05a07cd6fdf 785 }
va009039 0:a05a07cd6fdf 786 }
va009039 0:a05a07cd6fdf 787
va009039 0:a05a07cd6fdf 788 static int l2cap_channel_ready_for_open(l2cap_channel_t *channel){
va009039 0:a05a07cd6fdf 789 // log_info("l2cap_channel_ready_for_open 0x%02x\n", channel->state_var);
va009039 0:a05a07cd6fdf 790 if ((channel->state_var & L2CAP_CHANNEL_STATE_VAR_RCVD_CONF_RSP) == 0) return 0;
va009039 0:a05a07cd6fdf 791 if ((channel->state_var & L2CAP_CHANNEL_STATE_VAR_SENT_CONF_RSP) == 0) return 0;
va009039 0:a05a07cd6fdf 792 return 1;
va009039 0:a05a07cd6fdf 793 }
va009039 0:a05a07cd6fdf 794
va009039 0:a05a07cd6fdf 795
va009039 0:a05a07cd6fdf 796 void l2cap_signaling_handler_channel(l2cap_channel_t *channel, uint8_t *command){
va009039 0:a05a07cd6fdf 797
va009039 0:a05a07cd6fdf 798 uint8_t code = command[L2CAP_SIGNALING_COMMAND_CODE_OFFSET];
va009039 0:a05a07cd6fdf 799 uint8_t identifier = command[L2CAP_SIGNALING_COMMAND_SIGID_OFFSET];
va009039 0:a05a07cd6fdf 800 uint16_t result = 0;
va009039 0:a05a07cd6fdf 801
va009039 0:a05a07cd6fdf 802 log_info("L2CAP signaling handler code %u, state %u\n", code, channel->state);
va009039 0:a05a07cd6fdf 803
va009039 0:a05a07cd6fdf 804 // handle DISCONNECT REQUESTS seperately
va009039 0:a05a07cd6fdf 805 if (code == DISCONNECTION_REQUEST){
va009039 0:a05a07cd6fdf 806 switch (channel->state){
va009039 0:a05a07cd6fdf 807 case L2CAP_STATE_CONFIG:
va009039 0:a05a07cd6fdf 808 case L2CAP_STATE_OPEN:
va009039 0:a05a07cd6fdf 809 case L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST:
va009039 0:a05a07cd6fdf 810 case L2CAP_STATE_WAIT_DISCONNECT:
va009039 0:a05a07cd6fdf 811 l2cap_handle_disconnect_request(channel, identifier);
va009039 0:a05a07cd6fdf 812 break;
va009039 0:a05a07cd6fdf 813
va009039 0:a05a07cd6fdf 814 default:
va009039 0:a05a07cd6fdf 815 // ignore in other states
va009039 0:a05a07cd6fdf 816 break;
va009039 0:a05a07cd6fdf 817 }
va009039 0:a05a07cd6fdf 818 return;
va009039 0:a05a07cd6fdf 819 }
va009039 0:a05a07cd6fdf 820
va009039 0:a05a07cd6fdf 821 // @STATEMACHINE(l2cap)
va009039 0:a05a07cd6fdf 822 switch (channel->state) {
va009039 0:a05a07cd6fdf 823
va009039 0:a05a07cd6fdf 824 case L2CAP_STATE_WAIT_CONNECT_RSP:
va009039 0:a05a07cd6fdf 825 switch (code){
va009039 0:a05a07cd6fdf 826 case CONNECTION_RESPONSE:
va009039 0:a05a07cd6fdf 827 result = READ_BT_16 (command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+4);
va009039 0:a05a07cd6fdf 828 switch (result) {
va009039 0:a05a07cd6fdf 829 case 0:
va009039 0:a05a07cd6fdf 830 // successful connection
va009039 0:a05a07cd6fdf 831 channel->remote_cid = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET);
va009039 0:a05a07cd6fdf 832 channel->state = L2CAP_STATE_CONFIG;
va009039 0:a05a07cd6fdf 833 channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ);
va009039 0:a05a07cd6fdf 834 break;
va009039 0:a05a07cd6fdf 835 case 1:
va009039 0:a05a07cd6fdf 836 // connection pending. get some coffee
va009039 0:a05a07cd6fdf 837 break;
va009039 0:a05a07cd6fdf 838 default:
va009039 0:a05a07cd6fdf 839 // channel closed
va009039 0:a05a07cd6fdf 840 channel->state = L2CAP_STATE_CLOSED;
va009039 0:a05a07cd6fdf 841
va009039 0:a05a07cd6fdf 842 // map l2cap connection response result to BTstack status enumeration
va009039 0:a05a07cd6fdf 843 l2cap_emit_channel_opened(channel, L2CAP_CONNECTION_RESPONSE_RESULT_SUCCESSFUL + result);
va009039 0:a05a07cd6fdf 844
va009039 0:a05a07cd6fdf 845 // drop link key if security block
va009039 0:a05a07cd6fdf 846 if (L2CAP_CONNECTION_RESPONSE_RESULT_SUCCESSFUL + result == L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_SECURITY){
va009039 0:a05a07cd6fdf 847 hci_drop_link_key_for_bd_addr(&channel->address);
va009039 0:a05a07cd6fdf 848 }
va009039 0:a05a07cd6fdf 849
va009039 0:a05a07cd6fdf 850 // discard channel
va009039 0:a05a07cd6fdf 851 linked_list_remove(&l2cap_channels, (linked_item_t *) channel);
va009039 0:a05a07cd6fdf 852 btstack_memory_l2cap_channel_free(channel);
va009039 0:a05a07cd6fdf 853 break;
va009039 0:a05a07cd6fdf 854 }
va009039 0:a05a07cd6fdf 855 break;
va009039 0:a05a07cd6fdf 856
va009039 0:a05a07cd6fdf 857 default:
va009039 0:a05a07cd6fdf 858 //@TODO: implement other signaling packets
va009039 0:a05a07cd6fdf 859 break;
va009039 0:a05a07cd6fdf 860 }
va009039 0:a05a07cd6fdf 861 break;
va009039 0:a05a07cd6fdf 862
va009039 0:a05a07cd6fdf 863 case L2CAP_STATE_CONFIG:
va009039 0:a05a07cd6fdf 864 switch (code) {
va009039 0:a05a07cd6fdf 865 case CONFIGURE_REQUEST:
va009039 0:a05a07cd6fdf 866 channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_RCVD_CONF_REQ);
va009039 0:a05a07cd6fdf 867 channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP);
va009039 0:a05a07cd6fdf 868 l2cap_signaling_handle_configure_request(channel, command);
va009039 0:a05a07cd6fdf 869 break;
va009039 0:a05a07cd6fdf 870 case CONFIGURE_RESPONSE:
va009039 0:a05a07cd6fdf 871 channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_RCVD_CONF_RSP);
va009039 0:a05a07cd6fdf 872 break;
va009039 0:a05a07cd6fdf 873 default:
va009039 0:a05a07cd6fdf 874 break;
va009039 0:a05a07cd6fdf 875 }
va009039 0:a05a07cd6fdf 876 if (l2cap_channel_ready_for_open(channel)){
va009039 0:a05a07cd6fdf 877 // for open:
va009039 0:a05a07cd6fdf 878 channel->state = L2CAP_STATE_OPEN;
va009039 0:a05a07cd6fdf 879 l2cap_emit_channel_opened(channel, 0);
va009039 0:a05a07cd6fdf 880 l2cap_emit_credits(channel, 1);
va009039 0:a05a07cd6fdf 881 }
va009039 0:a05a07cd6fdf 882 break;
va009039 0:a05a07cd6fdf 883
va009039 0:a05a07cd6fdf 884 case L2CAP_STATE_WAIT_DISCONNECT:
va009039 0:a05a07cd6fdf 885 switch (code) {
va009039 0:a05a07cd6fdf 886 case DISCONNECTION_RESPONSE:
va009039 0:a05a07cd6fdf 887 l2cap_finialize_channel_close(channel);
va009039 0:a05a07cd6fdf 888 break;
va009039 0:a05a07cd6fdf 889 default:
va009039 0:a05a07cd6fdf 890 //@TODO: implement other signaling packets
va009039 0:a05a07cd6fdf 891 break;
va009039 0:a05a07cd6fdf 892 }
va009039 0:a05a07cd6fdf 893 break;
va009039 0:a05a07cd6fdf 894
va009039 0:a05a07cd6fdf 895 case L2CAP_STATE_CLOSED:
va009039 0:a05a07cd6fdf 896 // @TODO handle incoming requests
va009039 0:a05a07cd6fdf 897 break;
va009039 0:a05a07cd6fdf 898
va009039 0:a05a07cd6fdf 899 case L2CAP_STATE_OPEN:
va009039 0:a05a07cd6fdf 900 //@TODO: implement other signaling packets, e.g. re-configure
va009039 0:a05a07cd6fdf 901 break;
va009039 0:a05a07cd6fdf 902 default:
va009039 0:a05a07cd6fdf 903 break;
va009039 0:a05a07cd6fdf 904 }
va009039 0:a05a07cd6fdf 905 // log_info("new state %u\n", channel->state);
va009039 0:a05a07cd6fdf 906 }
va009039 0:a05a07cd6fdf 907
va009039 0:a05a07cd6fdf 908
va009039 0:a05a07cd6fdf 909 void l2cap_signaling_handler_dispatch( hci_con_handle_t handle, uint8_t * command){
va009039 0:a05a07cd6fdf 910
va009039 0:a05a07cd6fdf 911 // get code, signalind identifier and command len
va009039 0:a05a07cd6fdf 912 uint8_t code = command[L2CAP_SIGNALING_COMMAND_CODE_OFFSET];
va009039 0:a05a07cd6fdf 913 uint8_t sig_id = command[L2CAP_SIGNALING_COMMAND_SIGID_OFFSET];
va009039 0:a05a07cd6fdf 914
va009039 0:a05a07cd6fdf 915 // not for a particular channel, and not CONNECTION_REQUEST, ECHO_[REQUEST|RESPONSE], INFORMATION_REQUEST
va009039 0:a05a07cd6fdf 916 if (code < 1 || code == ECHO_RESPONSE || code > INFORMATION_REQUEST){
va009039 0:a05a07cd6fdf 917 return;
va009039 0:a05a07cd6fdf 918 }
va009039 0:a05a07cd6fdf 919
va009039 0:a05a07cd6fdf 920 // general commands without an assigned channel
va009039 0:a05a07cd6fdf 921 switch(code) {
va009039 0:a05a07cd6fdf 922
va009039 0:a05a07cd6fdf 923 case CONNECTION_REQUEST: {
va009039 0:a05a07cd6fdf 924 uint16_t psm = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET);
va009039 0:a05a07cd6fdf 925 uint16_t source_cid = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+2);
va009039 0:a05a07cd6fdf 926 l2cap_handle_connection_request(handle, sig_id, psm, source_cid);
va009039 0:a05a07cd6fdf 927 return;
va009039 0:a05a07cd6fdf 928 }
va009039 0:a05a07cd6fdf 929
va009039 0:a05a07cd6fdf 930 case ECHO_REQUEST:
va009039 0:a05a07cd6fdf 931 l2cap_register_signaling_response(handle, code, sig_id, 0);
va009039 0:a05a07cd6fdf 932 return;
va009039 0:a05a07cd6fdf 933
va009039 0:a05a07cd6fdf 934 case INFORMATION_REQUEST: {
va009039 0:a05a07cd6fdf 935 uint16_t infoType = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET);
va009039 0:a05a07cd6fdf 936 l2cap_register_signaling_response(handle, code, sig_id, infoType);
va009039 0:a05a07cd6fdf 937 return;
va009039 0:a05a07cd6fdf 938 }
va009039 0:a05a07cd6fdf 939
va009039 0:a05a07cd6fdf 940 default:
va009039 0:a05a07cd6fdf 941 break;
va009039 0:a05a07cd6fdf 942 }
va009039 0:a05a07cd6fdf 943
va009039 0:a05a07cd6fdf 944
va009039 0:a05a07cd6fdf 945 // Get potential destination CID
va009039 0:a05a07cd6fdf 946 uint16_t dest_cid = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET);
va009039 0:a05a07cd6fdf 947
va009039 0:a05a07cd6fdf 948 // Find channel for this sig_id and connection handle
va009039 0:a05a07cd6fdf 949 linked_item_t *it;
va009039 0:a05a07cd6fdf 950 for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){
va009039 0:a05a07cd6fdf 951 l2cap_channel_t * channel = (l2cap_channel_t *) it;
va009039 0:a05a07cd6fdf 952 if (channel->handle == handle) {
va009039 0:a05a07cd6fdf 953 if (code & 1) {
va009039 0:a05a07cd6fdf 954 // match odd commands (responses) by previous signaling identifier
va009039 0:a05a07cd6fdf 955 if (channel->local_sig_id == sig_id) {
va009039 0:a05a07cd6fdf 956 l2cap_signaling_handler_channel(channel, command);
va009039 0:a05a07cd6fdf 957 break;
va009039 0:a05a07cd6fdf 958 }
va009039 0:a05a07cd6fdf 959 } else {
va009039 0:a05a07cd6fdf 960 // match even commands (requests) by local channel id
va009039 0:a05a07cd6fdf 961 if (channel->local_cid == dest_cid) {
va009039 0:a05a07cd6fdf 962 l2cap_signaling_handler_channel(channel, command);
va009039 0:a05a07cd6fdf 963 break;
va009039 0:a05a07cd6fdf 964 }
va009039 0:a05a07cd6fdf 965 }
va009039 0:a05a07cd6fdf 966 }
va009039 0:a05a07cd6fdf 967 }
va009039 0:a05a07cd6fdf 968 }
va009039 0:a05a07cd6fdf 969
va009039 0:a05a07cd6fdf 970 void l2cap_acl_handler( uint8_t *packet, uint16_t size ){
va009039 0:a05a07cd6fdf 971
va009039 0:a05a07cd6fdf 972 // Get Channel ID
va009039 0:a05a07cd6fdf 973 uint16_t channel_id = READ_L2CAP_CHANNEL_ID(packet);
va009039 0:a05a07cd6fdf 974 hci_con_handle_t handle = READ_ACL_CONNECTION_HANDLE(packet);
va009039 0:a05a07cd6fdf 975
va009039 0:a05a07cd6fdf 976 switch (channel_id) {
va009039 0:a05a07cd6fdf 977
va009039 0:a05a07cd6fdf 978 case L2CAP_CID_SIGNALING: {
va009039 0:a05a07cd6fdf 979
va009039 0:a05a07cd6fdf 980 uint16_t command_offset = 8;
va009039 0:a05a07cd6fdf 981 while (command_offset < size) {
va009039 0:a05a07cd6fdf 982
va009039 0:a05a07cd6fdf 983 // handle signaling commands
va009039 0:a05a07cd6fdf 984 l2cap_signaling_handler_dispatch(handle, &packet[command_offset]);
va009039 0:a05a07cd6fdf 985
va009039 0:a05a07cd6fdf 986 // increment command_offset
va009039 0:a05a07cd6fdf 987 command_offset += L2CAP_SIGNALING_COMMAND_DATA_OFFSET + READ_BT_16(packet, command_offset + L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET);
va009039 0:a05a07cd6fdf 988 }
va009039 0:a05a07cd6fdf 989 break;
va009039 0:a05a07cd6fdf 990 }
va009039 0:a05a07cd6fdf 991
va009039 0:a05a07cd6fdf 992 case L2CAP_CID_ATTRIBUTE_PROTOCOL:
va009039 0:a05a07cd6fdf 993 if (attribute_protocol_packet_handler) {
va009039 0:a05a07cd6fdf 994 (*attribute_protocol_packet_handler)(ATT_DATA_PACKET, handle, &packet[COMPLETE_L2CAP_HEADER], size-COMPLETE_L2CAP_HEADER);
va009039 0:a05a07cd6fdf 995 }
va009039 0:a05a07cd6fdf 996 break;
va009039 0:a05a07cd6fdf 997
va009039 0:a05a07cd6fdf 998 case L2CAP_CID_SECURITY_MANAGER_PROTOCOL:
va009039 0:a05a07cd6fdf 999 if (security_protocol_packet_handler) {
va009039 0:a05a07cd6fdf 1000 (*security_protocol_packet_handler)(SM_DATA_PACKET, handle, &packet[COMPLETE_L2CAP_HEADER], size-COMPLETE_L2CAP_HEADER);
va009039 0:a05a07cd6fdf 1001 }
va009039 0:a05a07cd6fdf 1002 break;
va009039 0:a05a07cd6fdf 1003
va009039 0:a05a07cd6fdf 1004 default: {
va009039 0:a05a07cd6fdf 1005 // Find channel for this channel_id and connection handle
va009039 0:a05a07cd6fdf 1006 l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(channel_id);
va009039 0:a05a07cd6fdf 1007 if (channel) {
va009039 0:a05a07cd6fdf 1008 l2cap_dispatch(channel, L2CAP_DATA_PACKET, &packet[COMPLETE_L2CAP_HEADER], size-COMPLETE_L2CAP_HEADER);
va009039 0:a05a07cd6fdf 1009 }
va009039 0:a05a07cd6fdf 1010 break;
va009039 0:a05a07cd6fdf 1011 }
va009039 0:a05a07cd6fdf 1012 }
va009039 0:a05a07cd6fdf 1013
va009039 0:a05a07cd6fdf 1014 l2cap_run();
va009039 0:a05a07cd6fdf 1015 }
va009039 0:a05a07cd6fdf 1016
va009039 0:a05a07cd6fdf 1017 static void l2cap_packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){
va009039 0:a05a07cd6fdf 1018 switch (packet_type) {
va009039 0:a05a07cd6fdf 1019 case HCI_EVENT_PACKET:
va009039 0:a05a07cd6fdf 1020 l2cap_event_handler(packet, size);
va009039 0:a05a07cd6fdf 1021 break;
va009039 0:a05a07cd6fdf 1022 case HCI_ACL_DATA_PACKET:
va009039 0:a05a07cd6fdf 1023 l2cap_acl_handler(packet, size);
va009039 0:a05a07cd6fdf 1024 break;
va009039 0:a05a07cd6fdf 1025 default:
va009039 0:a05a07cd6fdf 1026 break;
va009039 0:a05a07cd6fdf 1027 }
va009039 0:a05a07cd6fdf 1028 }
va009039 0:a05a07cd6fdf 1029
va009039 0:a05a07cd6fdf 1030 // finalize closed channel - l2cap_handle_disconnect_request & DISCONNECTION_RESPONSE
va009039 0:a05a07cd6fdf 1031 void l2cap_finialize_channel_close(l2cap_channel_t *channel){
va009039 0:a05a07cd6fdf 1032 channel->state = L2CAP_STATE_CLOSED;
va009039 0:a05a07cd6fdf 1033 l2cap_emit_channel_closed(channel);
va009039 0:a05a07cd6fdf 1034 // discard channel
va009039 0:a05a07cd6fdf 1035 linked_list_remove(&l2cap_channels, (linked_item_t *) channel);
va009039 0:a05a07cd6fdf 1036 btstack_memory_l2cap_channel_free(channel);
va009039 0:a05a07cd6fdf 1037 }
va009039 0:a05a07cd6fdf 1038
va009039 0:a05a07cd6fdf 1039 l2cap_service_t * l2cap_get_service(uint16_t psm){
va009039 0:a05a07cd6fdf 1040 linked_item_t *it;
va009039 0:a05a07cd6fdf 1041
va009039 0:a05a07cd6fdf 1042 // close open channels
va009039 0:a05a07cd6fdf 1043 for (it = (linked_item_t *) l2cap_services; it ; it = it->next){
va009039 0:a05a07cd6fdf 1044 l2cap_service_t * service = ((l2cap_service_t *) it);
va009039 0:a05a07cd6fdf 1045 if ( service->psm == psm){
va009039 0:a05a07cd6fdf 1046 return service;
va009039 0:a05a07cd6fdf 1047 };
va009039 0:a05a07cd6fdf 1048 }
va009039 0:a05a07cd6fdf 1049 return NULL;
va009039 0:a05a07cd6fdf 1050 }
va009039 0:a05a07cd6fdf 1051
va009039 0:a05a07cd6fdf 1052 void l2cap_register_service_internal(void *connection, btstack_packet_handler_t packet_handler, uint16_t psm, uint16_t mtu){
va009039 0:a05a07cd6fdf 1053 // check for alread registered psm
va009039 0:a05a07cd6fdf 1054 // TODO: emit error event
va009039 0:a05a07cd6fdf 1055 l2cap_service_t *service = l2cap_get_service(psm);
va009039 0:a05a07cd6fdf 1056 if (service) {
va009039 0:a05a07cd6fdf 1057 log_error("l2cap_register_service_internal: PSM %u already registered\n", psm);
va009039 0:a05a07cd6fdf 1058 l2cap_emit_service_registered(connection, L2CAP_SERVICE_ALREADY_REGISTERED, psm);
va009039 0:a05a07cd6fdf 1059 return;
va009039 0:a05a07cd6fdf 1060 }
va009039 0:a05a07cd6fdf 1061
va009039 0:a05a07cd6fdf 1062 // alloc structure
va009039 0:a05a07cd6fdf 1063 // TODO: emit error event
va009039 0:a05a07cd6fdf 1064 service = (l2cap_service_t *) btstack_memory_l2cap_service_get();
va009039 0:a05a07cd6fdf 1065 if (!service) {
va009039 0:a05a07cd6fdf 1066 log_error("l2cap_register_service_internal: no memory for l2cap_service_t\n");
va009039 0:a05a07cd6fdf 1067 l2cap_emit_service_registered(connection, BTSTACK_MEMORY_ALLOC_FAILED, psm);
va009039 0:a05a07cd6fdf 1068 return;
va009039 0:a05a07cd6fdf 1069 }
va009039 0:a05a07cd6fdf 1070
va009039 0:a05a07cd6fdf 1071 // fill in
va009039 0:a05a07cd6fdf 1072 service->psm = psm;
va009039 0:a05a07cd6fdf 1073 service->mtu = mtu;
va009039 0:a05a07cd6fdf 1074 service->connection = connection;
va009039 0:a05a07cd6fdf 1075 service->packet_handler = packet_handler;
va009039 0:a05a07cd6fdf 1076
va009039 0:a05a07cd6fdf 1077 // add to services list
va009039 0:a05a07cd6fdf 1078 linked_list_add(&l2cap_services, (linked_item_t *) service);
va009039 0:a05a07cd6fdf 1079
va009039 0:a05a07cd6fdf 1080 // enable page scan
va009039 0:a05a07cd6fdf 1081 hci_connectable_control(1);
va009039 0:a05a07cd6fdf 1082
va009039 0:a05a07cd6fdf 1083 // done
va009039 0:a05a07cd6fdf 1084 l2cap_emit_service_registered(connection, 0, psm);
va009039 0:a05a07cd6fdf 1085 }
va009039 0:a05a07cd6fdf 1086
va009039 0:a05a07cd6fdf 1087 void l2cap_unregister_service_internal(void *connection, uint16_t psm){
va009039 0:a05a07cd6fdf 1088 l2cap_service_t *service = l2cap_get_service(psm);
va009039 0:a05a07cd6fdf 1089 if (!service) return;
va009039 0:a05a07cd6fdf 1090 linked_list_remove(&l2cap_services, (linked_item_t *) service);
va009039 0:a05a07cd6fdf 1091 btstack_memory_l2cap_service_free(service);
va009039 0:a05a07cd6fdf 1092
va009039 0:a05a07cd6fdf 1093 // disable page scan when no services registered
va009039 0:a05a07cd6fdf 1094 if (!linked_list_empty(&l2cap_services)) return;
va009039 0:a05a07cd6fdf 1095 hci_connectable_control(0);
va009039 0:a05a07cd6fdf 1096 }
va009039 0:a05a07cd6fdf 1097
va009039 0:a05a07cd6fdf 1098 //
va009039 0:a05a07cd6fdf 1099 void l2cap_close_connection(void *connection){
va009039 0:a05a07cd6fdf 1100 linked_item_t *it;
va009039 0:a05a07cd6fdf 1101
va009039 0:a05a07cd6fdf 1102 // close open channels - note to myself: no channel is freed, so no new for fancy iterator tricks
va009039 0:a05a07cd6fdf 1103 l2cap_channel_t * channel;
va009039 0:a05a07cd6fdf 1104 for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){
va009039 0:a05a07cd6fdf 1105 channel = (l2cap_channel_t *) it;
va009039 0:a05a07cd6fdf 1106 if (channel->connection == connection) {
va009039 0:a05a07cd6fdf 1107 channel->state = L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST;
va009039 0:a05a07cd6fdf 1108 }
va009039 0:a05a07cd6fdf 1109 }
va009039 0:a05a07cd6fdf 1110
va009039 0:a05a07cd6fdf 1111 // unregister services
va009039 0:a05a07cd6fdf 1112 it = (linked_item_t *) &l2cap_services;
va009039 0:a05a07cd6fdf 1113 while (it->next) {
va009039 0:a05a07cd6fdf 1114 l2cap_service_t * service = (l2cap_service_t *) it->next;
va009039 0:a05a07cd6fdf 1115 if (service->connection == connection){
va009039 0:a05a07cd6fdf 1116 it->next = it->next->next;
va009039 0:a05a07cd6fdf 1117 btstack_memory_l2cap_service_free(service);
va009039 0:a05a07cd6fdf 1118 } else {
va009039 0:a05a07cd6fdf 1119 it = it->next;
va009039 0:a05a07cd6fdf 1120 }
va009039 0:a05a07cd6fdf 1121 }
va009039 0:a05a07cd6fdf 1122
va009039 0:a05a07cd6fdf 1123 // process
va009039 0:a05a07cd6fdf 1124 l2cap_run();
va009039 0:a05a07cd6fdf 1125 }
va009039 0:a05a07cd6fdf 1126
va009039 0:a05a07cd6fdf 1127 // Bluetooth 4.0 - allows to register handler for Attribute Protocol and Security Manager Protocol
va009039 0:a05a07cd6fdf 1128 void l2cap_register_fixed_channel(btstack_packet_handler_t packet_handler, uint16_t channel_id) {
va009039 0:a05a07cd6fdf 1129 switch(channel_id){
va009039 0:a05a07cd6fdf 1130 case L2CAP_CID_ATTRIBUTE_PROTOCOL:
va009039 0:a05a07cd6fdf 1131 attribute_protocol_packet_handler = packet_handler;
va009039 0:a05a07cd6fdf 1132 break;
va009039 0:a05a07cd6fdf 1133 case L2CAP_CID_SECURITY_MANAGER_PROTOCOL:
va009039 0:a05a07cd6fdf 1134 security_protocol_packet_handler = packet_handler;
va009039 0:a05a07cd6fdf 1135 break;
va009039 0:a05a07cd6fdf 1136 }
va009039 0:a05a07cd6fdf 1137 }
va009039 0:a05a07cd6fdf 1138