M tamaki
mbed base bard check program for BlueTooth USB dongle module (3 switches, 6 leds, I2C LCD, A/D)
Fork of
BTstack
by 
Norimasa Okamoto
BTstack/l2cap.c@0:1ed23ab1345f, 2012-06-26 (annotated)
- Committer:
- va009039
- Date:
- Tue Jun 26 14:27:45 2012 +0000
- Revision:
- 0:1ed23ab1345f
fix overflow spp_service_buffer
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| va009039 | 0:1ed23ab1345f | 1 | /* |
| va009039 | 0:1ed23ab1345f | 2 | * Copyright (C) 2009-2012 by Matthias Ringwald |
| va009039 | 0:1ed23ab1345f | 3 | * |
| va009039 | 0:1ed23ab1345f | 4 | * Redistribution and use in source and binary forms, with or without |
| va009039 | 0:1ed23ab1345f | 5 | * modification, are permitted provided that the following conditions |
| va009039 | 0:1ed23ab1345f | 6 | * are met: |
| va009039 | 0:1ed23ab1345f | 7 | * |
| va009039 | 0:1ed23ab1345f | 8 | * 1. Redistributions of source code must retain the above copyright |
| va009039 | 0:1ed23ab1345f | 9 | * notice, this list of conditions and the following disclaimer. |
| va009039 | 0:1ed23ab1345f | 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| va009039 | 0:1ed23ab1345f | 11 | * notice, this list of conditions and the following disclaimer in the |
| va009039 | 0:1ed23ab1345f | 12 | * documentation and/or other materials provided with the distribution. |
| va009039 | 0:1ed23ab1345f | 13 | * 3. Neither the name of the copyright holders nor the names of |
| va009039 | 0:1ed23ab1345f | 14 | * contributors may be used to endorse or promote products derived |
| va009039 | 0:1ed23ab1345f | 15 | * from this software without specific prior written permission. |
| va009039 | 0:1ed23ab1345f | 16 | * 4. Any redistribution, use, or modification is done solely for |
| va009039 | 0:1ed23ab1345f | 17 | * personal benefit and not for any commercial purpose or for |
| va009039 | 0:1ed23ab1345f | 18 | * monetary gain. |
| va009039 | 0:1ed23ab1345f | 19 | * |
| va009039 | 0:1ed23ab1345f | 20 | * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS |
| va009039 | 0:1ed23ab1345f | 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| va009039 | 0:1ed23ab1345f | 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| va009039 | 0:1ed23ab1345f | 23 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS |
| va009039 | 0:1ed23ab1345f | 24 | * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| va009039 | 0:1ed23ab1345f | 25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| va009039 | 0:1ed23ab1345f | 26 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| va009039 | 0:1ed23ab1345f | 27 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| va009039 | 0:1ed23ab1345f | 28 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| va009039 | 0:1ed23ab1345f | 29 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF |
| va009039 | 0:1ed23ab1345f | 30 | * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| va009039 | 0:1ed23ab1345f | 31 | * SUCH DAMAGE. |
| va009039 | 0:1ed23ab1345f | 32 | * |
| va009039 | 0:1ed23ab1345f | 33 | * Please inquire about commercial licensing options at btstack@ringwald.ch |
| va009039 | 0:1ed23ab1345f | 34 | * |
| va009039 | 0:1ed23ab1345f | 35 | */ |
| va009039 | 0:1ed23ab1345f | 36 | |
| va009039 | 0:1ed23ab1345f | 37 | /* |
| va009039 | 0:1ed23ab1345f | 38 | * l2cap.c |
| va009039 | 0:1ed23ab1345f | 39 | * |
| va009039 | 0:1ed23ab1345f | 40 | * Logical Link Control and Adaption Protocl (L2CAP) |
| va009039 | 0:1ed23ab1345f | 41 | * |
| va009039 | 0:1ed23ab1345f | 42 | * Created by Matthias Ringwald on 5/16/09. |
| va009039 | 0:1ed23ab1345f | 43 | */ |
| va009039 | 0:1ed23ab1345f | 44 | |
| va009039 | 0:1ed23ab1345f | 45 | #include "l2cap.h" |
| va009039 | 0:1ed23ab1345f | 46 | #include "hci.h" |
| va009039 | 0:1ed23ab1345f | 47 | #include "hci_dump.h" |
| va009039 | 0:1ed23ab1345f | 48 | #include "debug.h" |
| va009039 | 0:1ed23ab1345f | 49 | #include "btstack_memory.h" |
| va009039 | 0:1ed23ab1345f | 50 | |
| va009039 | 0:1ed23ab1345f | 51 | #include <stdarg.h> |
| va009039 | 0:1ed23ab1345f | 52 | #include <string.h> |
| va009039 | 0:1ed23ab1345f | 53 | |
| va009039 | 0:1ed23ab1345f | 54 | #include <stdio.h> |
| va009039 | 0:1ed23ab1345f | 55 | |
| va009039 | 0:1ed23ab1345f | 56 | // nr of buffered acl packets in outgoing queue to get max performance |
| va009039 | 0:1ed23ab1345f | 57 | #define NR_BUFFERED_ACL_PACKETS 3 |
| va009039 | 0:1ed23ab1345f | 58 | |
| va009039 | 0:1ed23ab1345f | 59 | // used to cache l2cap rejects, echo, and informational requests |
| va009039 | 0:1ed23ab1345f | 60 | #define NR_PENDING_SIGNALING_RESPONSES 3 |
| va009039 | 0:1ed23ab1345f | 61 | |
| va009039 | 0:1ed23ab1345f | 62 | // offsets for L2CAP SIGNALING COMMANDS |
| va009039 | 0:1ed23ab1345f | 63 | #define L2CAP_SIGNALING_COMMAND_CODE_OFFSET 0 |
| va009039 | 0:1ed23ab1345f | 64 | #define L2CAP_SIGNALING_COMMAND_SIGID_OFFSET 1 |
| va009039 | 0:1ed23ab1345f | 65 | #define L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET 2 |
| va009039 | 0:1ed23ab1345f | 66 | #define L2CAP_SIGNALING_COMMAND_DATA_OFFSET 4 |
| va009039 | 0:1ed23ab1345f | 67 | |
| va009039 | 0:1ed23ab1345f | 68 | static void null_packet_handler(void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); |
| va009039 | 0:1ed23ab1345f | 69 | static void l2cap_packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size); |
| va009039 | 0:1ed23ab1345f | 70 | |
| va009039 | 0:1ed23ab1345f | 71 | // used to cache l2cap rejects, echo, and informational requests |
| va009039 | 0:1ed23ab1345f | 72 | static l2cap_signaling_response_t signaling_responses[NR_PENDING_SIGNALING_RESPONSES]; |
| va009039 | 0:1ed23ab1345f | 73 | static int signaling_responses_pending; |
| va009039 | 0:1ed23ab1345f | 74 | |
| va009039 | 0:1ed23ab1345f | 75 | static linked_list_t l2cap_channels = NULL; |
| va009039 | 0:1ed23ab1345f | 76 | static linked_list_t l2cap_services = NULL; |
| va009039 | 0:1ed23ab1345f | 77 | static void (*packet_handler) (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) = null_packet_handler; |
| va009039 | 0:1ed23ab1345f | 78 | static int new_credits_blocked = 0; |
| va009039 | 0:1ed23ab1345f | 79 | |
| va009039 | 0:1ed23ab1345f | 80 | static btstack_packet_handler_t attribute_protocol_packet_handler = NULL; |
| va009039 | 0:1ed23ab1345f | 81 | static btstack_packet_handler_t security_protocol_packet_handler = NULL; |
| va009039 | 0:1ed23ab1345f | 82 | |
| va009039 | 0:1ed23ab1345f | 83 | // prototypes |
| va009039 | 0:1ed23ab1345f | 84 | static void l2cap_finialize_channel_close(l2cap_channel_t *channel); |
| va009039 | 0:1ed23ab1345f | 85 | static l2cap_service_t * l2cap_get_service(uint16_t psm); |
| va009039 | 0:1ed23ab1345f | 86 | static void l2cap_emit_channel_opened(l2cap_channel_t *channel, uint8_t status); |
| va009039 | 0:1ed23ab1345f | 87 | static void l2cap_emit_channel_closed(l2cap_channel_t *channel); |
| va009039 | 0:1ed23ab1345f | 88 | static void l2cap_emit_connection_request(l2cap_channel_t *channel); |
| va009039 | 0:1ed23ab1345f | 89 | static int l2cap_channel_ready_for_open(l2cap_channel_t *channel); |
| va009039 | 0:1ed23ab1345f | 90 | |
| va009039 | 0:1ed23ab1345f | 91 | |
| va009039 | 0:1ed23ab1345f | 92 | void l2cap_init(){ |
| va009039 | 0:1ed23ab1345f | 93 | new_credits_blocked = 0; |
| va009039 | 0:1ed23ab1345f | 94 | signaling_responses_pending = 0; |
| va009039 | 0:1ed23ab1345f | 95 | |
| va009039 | 0:1ed23ab1345f | 96 | l2cap_channels = NULL; |
| va009039 | 0:1ed23ab1345f | 97 | l2cap_services = NULL; |
| va009039 | 0:1ed23ab1345f | 98 | |
| va009039 | 0:1ed23ab1345f | 99 | packet_handler = null_packet_handler; |
| va009039 | 0:1ed23ab1345f | 100 | |
| va009039 | 0:1ed23ab1345f | 101 | // |
| va009039 | 0:1ed23ab1345f | 102 | // register callback with HCI |
| va009039 | 0:1ed23ab1345f | 103 | // |
| va009039 | 0:1ed23ab1345f | 104 | hci_register_packet_handler(&l2cap_packet_handler); |
| va009039 | 0:1ed23ab1345f | 105 | hci_connectable_control(0); // no services yet |
| va009039 | 0:1ed23ab1345f | 106 | } |
| va009039 | 0:1ed23ab1345f | 107 | |
| va009039 | 0:1ed23ab1345f | 108 | |
| va009039 | 0:1ed23ab1345f | 109 | /** Register L2CAP packet handlers */ |
| va009039 | 0:1ed23ab1345f | 110 | static void null_packet_handler(void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ |
| va009039 | 0:1ed23ab1345f | 111 | } |
| va009039 | 0:1ed23ab1345f | 112 | void l2cap_register_packet_handler(void (*handler)(void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)){ |
| va009039 | 0:1ed23ab1345f | 113 | packet_handler = handler; |
| va009039 | 0:1ed23ab1345f | 114 | } |
| va009039 | 0:1ed23ab1345f | 115 | |
| va009039 | 0:1ed23ab1345f | 116 | // notify client/protocol handler |
| va009039 | 0:1ed23ab1345f | 117 | void l2cap_dispatch(l2cap_channel_t *channel, uint8_t type, uint8_t * data, uint16_t size){ |
| va009039 | 0:1ed23ab1345f | 118 | if (channel->packet_handler) { |
| va009039 | 0:1ed23ab1345f | 119 | (* (channel->packet_handler))(type, channel->local_cid, data, size); |
| va009039 | 0:1ed23ab1345f | 120 | } else { |
| va009039 | 0:1ed23ab1345f | 121 | (*packet_handler)(channel->connection, type, channel->local_cid, data, size); |
| va009039 | 0:1ed23ab1345f | 122 | } |
| va009039 | 0:1ed23ab1345f | 123 | } |
| va009039 | 0:1ed23ab1345f | 124 | |
| va009039 | 0:1ed23ab1345f | 125 | void l2cap_emit_channel_opened(l2cap_channel_t *channel, uint8_t status) { |
| va009039 | 0:1ed23ab1345f | 126 | uint8_t event[21]; |
| va009039 | 0:1ed23ab1345f | 127 | event[0] = L2CAP_EVENT_CHANNEL_OPENED; |
| va009039 | 0:1ed23ab1345f | 128 | event[1] = sizeof(event) - 2; |
| va009039 | 0:1ed23ab1345f | 129 | event[2] = status; |
| va009039 | 0:1ed23ab1345f | 130 | bt_flip_addr(&event[3], channel->address); |
| va009039 | 0:1ed23ab1345f | 131 | bt_store_16(event, 9, channel->handle); |
| va009039 | 0:1ed23ab1345f | 132 | bt_store_16(event, 11, channel->psm); |
| va009039 | 0:1ed23ab1345f | 133 | bt_store_16(event, 13, channel->local_cid); |
| va009039 | 0:1ed23ab1345f | 134 | bt_store_16(event, 15, channel->remote_cid); |
| va009039 | 0:1ed23ab1345f | 135 | bt_store_16(event, 17, channel->local_mtu); |
| va009039 | 0:1ed23ab1345f | 136 | bt_store_16(event, 19, channel->remote_mtu); |
| va009039 | 0:1ed23ab1345f | 137 | hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 138 | l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 139 | } |
| va009039 | 0:1ed23ab1345f | 140 | |
| va009039 | 0:1ed23ab1345f | 141 | void l2cap_emit_channel_closed(l2cap_channel_t *channel) { |
| va009039 | 0:1ed23ab1345f | 142 | uint8_t event[4]; |
| va009039 | 0:1ed23ab1345f | 143 | event[0] = L2CAP_EVENT_CHANNEL_CLOSED; |
| va009039 | 0:1ed23ab1345f | 144 | event[1] = sizeof(event) - 2; |
| va009039 | 0:1ed23ab1345f | 145 | bt_store_16(event, 2, channel->local_cid); |
| va009039 | 0:1ed23ab1345f | 146 | hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 147 | l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 148 | } |
| va009039 | 0:1ed23ab1345f | 149 | |
| va009039 | 0:1ed23ab1345f | 150 | void l2cap_emit_connection_request(l2cap_channel_t *channel) { |
| va009039 | 0:1ed23ab1345f | 151 | uint8_t event[16]; |
| va009039 | 0:1ed23ab1345f | 152 | event[0] = L2CAP_EVENT_INCOMING_CONNECTION; |
| va009039 | 0:1ed23ab1345f | 153 | event[1] = sizeof(event) - 2; |
| va009039 | 0:1ed23ab1345f | 154 | bt_flip_addr(&event[2], channel->address); |
| va009039 | 0:1ed23ab1345f | 155 | bt_store_16(event, 8, channel->handle); |
| va009039 | 0:1ed23ab1345f | 156 | bt_store_16(event, 10, channel->psm); |
| va009039 | 0:1ed23ab1345f | 157 | bt_store_16(event, 12, channel->local_cid); |
| va009039 | 0:1ed23ab1345f | 158 | bt_store_16(event, 14, channel->remote_cid); |
| va009039 | 0:1ed23ab1345f | 159 | hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 160 | l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 161 | } |
| va009039 | 0:1ed23ab1345f | 162 | |
| va009039 | 0:1ed23ab1345f | 163 | static void l2cap_emit_service_registered(void *connection, uint8_t status, uint16_t psm){ |
| va009039 | 0:1ed23ab1345f | 164 | uint8_t event[5]; |
| va009039 | 0:1ed23ab1345f | 165 | event[0] = L2CAP_EVENT_SERVICE_REGISTERED; |
| va009039 | 0:1ed23ab1345f | 166 | event[1] = sizeof(event) - 2; |
| va009039 | 0:1ed23ab1345f | 167 | event[2] = status; |
| va009039 | 0:1ed23ab1345f | 168 | bt_store_16(event, 3, psm); |
| va009039 | 0:1ed23ab1345f | 169 | hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 170 | (*packet_handler)(connection, HCI_EVENT_PACKET, 0, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 171 | } |
| va009039 | 0:1ed23ab1345f | 172 | |
| va009039 | 0:1ed23ab1345f | 173 | void l2cap_emit_credits(l2cap_channel_t *channel, uint8_t credits) { |
| va009039 | 0:1ed23ab1345f | 174 | // track credits |
| va009039 | 0:1ed23ab1345f | 175 | channel->packets_granted += credits; |
| va009039 | 0:1ed23ab1345f | 176 | // log_info("l2cap_emit_credits for cid %u, credits given: %u (+%u)\n", channel->local_cid, channel->packets_granted, credits); |
| va009039 | 0:1ed23ab1345f | 177 | |
| va009039 | 0:1ed23ab1345f | 178 | uint8_t event[5]; |
| va009039 | 0:1ed23ab1345f | 179 | event[0] = L2CAP_EVENT_CREDITS; |
| va009039 | 0:1ed23ab1345f | 180 | event[1] = sizeof(event) - 2; |
| va009039 | 0:1ed23ab1345f | 181 | bt_store_16(event, 2, channel->local_cid); |
| va009039 | 0:1ed23ab1345f | 182 | event[4] = credits; |
| va009039 | 0:1ed23ab1345f | 183 | hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 184 | l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event)); |
| va009039 | 0:1ed23ab1345f | 185 | } |
| va009039 | 0:1ed23ab1345f | 186 | |
| va009039 | 0:1ed23ab1345f | 187 | void l2cap_block_new_credits(uint8_t blocked){ |
| va009039 | 0:1ed23ab1345f | 188 | new_credits_blocked = blocked; |
| va009039 | 0:1ed23ab1345f | 189 | } |
| va009039 | 0:1ed23ab1345f | 190 | |
| va009039 | 0:1ed23ab1345f | 191 | void l2cap_hand_out_credits(void){ |
| va009039 | 0:1ed23ab1345f | 192 | |
| va009039 | 0:1ed23ab1345f | 193 | if (new_credits_blocked) return; // we're told not to. used by daemon |
| va009039 | 0:1ed23ab1345f | 194 | |
| va009039 | 0:1ed23ab1345f | 195 | linked_item_t *it; |
| va009039 | 0:1ed23ab1345f | 196 | for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){ |
| va009039 | 0:1ed23ab1345f | 197 | if (!hci_number_free_acl_slots()) return; |
| va009039 | 0:1ed23ab1345f | 198 | l2cap_channel_t * channel = (l2cap_channel_t *) it; |
| va009039 | 0:1ed23ab1345f | 199 | if (channel->state != L2CAP_STATE_OPEN) continue; |
| va009039 | 0:1ed23ab1345f | 200 | if (hci_number_outgoing_packets(channel->handle) < NR_BUFFERED_ACL_PACKETS && channel->packets_granted == 0) { |
| va009039 | 0:1ed23ab1345f | 201 | l2cap_emit_credits(channel, 1); |
| va009039 | 0:1ed23ab1345f | 202 | } |
| va009039 | 0:1ed23ab1345f | 203 | } |
| va009039 | 0:1ed23ab1345f | 204 | } |
| va009039 | 0:1ed23ab1345f | 205 | |
| va009039 | 0:1ed23ab1345f | 206 | l2cap_channel_t * l2cap_get_channel_for_local_cid(uint16_t local_cid){ |
| va009039 | 0:1ed23ab1345f | 207 | linked_item_t *it; |
| va009039 | 0:1ed23ab1345f | 208 | for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){ |
| va009039 | 0:1ed23ab1345f | 209 | l2cap_channel_t * channel = (l2cap_channel_t *) it; |
| va009039 | 0:1ed23ab1345f | 210 | if ( channel->local_cid == local_cid) { |
| va009039 | 0:1ed23ab1345f | 211 | return channel; |
| va009039 | 0:1ed23ab1345f | 212 | } |
| va009039 | 0:1ed23ab1345f | 213 | } |
| va009039 | 0:1ed23ab1345f | 214 | return NULL; |
| va009039 | 0:1ed23ab1345f | 215 | } |
| va009039 | 0:1ed23ab1345f | 216 | |
| va009039 | 0:1ed23ab1345f | 217 | int l2cap_can_send_packet_now(uint16_t local_cid){ |
| va009039 | 0:1ed23ab1345f | 218 | l2cap_channel_t *channel = l2cap_get_channel_for_local_cid(local_cid); |
| va009039 | 0:1ed23ab1345f | 219 | if (!channel) return 0; |
| va009039 | 0:1ed23ab1345f | 220 | if (!channel->packets_granted) return 0; |
| va009039 | 0:1ed23ab1345f | 221 | return hci_can_send_packet_now(HCI_ACL_DATA_PACKET); |
| va009039 | 0:1ed23ab1345f | 222 | } |
| va009039 | 0:1ed23ab1345f | 223 | |
| va009039 | 0:1ed23ab1345f | 224 | uint16_t l2cap_get_remote_mtu_for_local_cid(uint16_t local_cid){ |
| va009039 | 0:1ed23ab1345f | 225 | l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(local_cid); |
| va009039 | 0:1ed23ab1345f | 226 | if (channel) { |
| va009039 | 0:1ed23ab1345f | 227 | return channel->remote_mtu; |
| va009039 | 0:1ed23ab1345f | 228 | } |
| va009039 | 0:1ed23ab1345f | 229 | return 0; |
| va009039 | 0:1ed23ab1345f | 230 | } |
| va009039 | 0:1ed23ab1345f | 231 | |
| va009039 | 0:1ed23ab1345f | 232 | int l2cap_send_signaling_packet(hci_con_handle_t handle, L2CAP_SIGNALING_COMMANDS cmd, uint8_t identifier, ...){ |
| va009039 | 0:1ed23ab1345f | 233 | |
| va009039 | 0:1ed23ab1345f | 234 | if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){ |
| va009039 | 0:1ed23ab1345f | 235 | log_info("l2cap_send_signaling_packet, cannot send\n"); |
| va009039 | 0:1ed23ab1345f | 236 | return BTSTACK_ACL_BUFFERS_FULL; |
| va009039 | 0:1ed23ab1345f | 237 | } |
| va009039 | 0:1ed23ab1345f | 238 | |
| va009039 | 0:1ed23ab1345f | 239 | // log_info("l2cap_send_signaling_packet type %u\n", cmd); |
| va009039 | 0:1ed23ab1345f | 240 | uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer(); |
| va009039 | 0:1ed23ab1345f | 241 | va_list argptr; |
| va009039 | 0:1ed23ab1345f | 242 | va_start(argptr, identifier); |
| va009039 | 0:1ed23ab1345f | 243 | uint16_t len = l2cap_create_signaling_internal(acl_buffer, handle, cmd, identifier, argptr); |
| va009039 | 0:1ed23ab1345f | 244 | va_end(argptr); |
| va009039 | 0:1ed23ab1345f | 245 | // log_info("l2cap_send_signaling_packet con %u!\n", handle); |
| va009039 | 0:1ed23ab1345f | 246 | return hci_send_acl_packet(acl_buffer, len); |
| va009039 | 0:1ed23ab1345f | 247 | } |
| va009039 | 0:1ed23ab1345f | 248 | |
| va009039 | 0:1ed23ab1345f | 249 | uint8_t *l2cap_get_outgoing_buffer(void){ |
| va009039 | 0:1ed23ab1345f | 250 | return hci_get_outgoing_acl_packet_buffer() + COMPLETE_L2CAP_HEADER; // 8 bytes |
| va009039 | 0:1ed23ab1345f | 251 | } |
| va009039 | 0:1ed23ab1345f | 252 | |
| va009039 | 0:1ed23ab1345f | 253 | int l2cap_send_prepared(uint16_t local_cid, uint16_t len){ |
| va009039 | 0:1ed23ab1345f | 254 | |
| va009039 | 0:1ed23ab1345f | 255 | if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){ |
| va009039 | 0:1ed23ab1345f | 256 | log_info("l2cap_send_internal cid %u, cannot send\n", local_cid); |
| va009039 | 0:1ed23ab1345f | 257 | return BTSTACK_ACL_BUFFERS_FULL; |
| va009039 | 0:1ed23ab1345f | 258 | } |
| va009039 | 0:1ed23ab1345f | 259 | |
| va009039 | 0:1ed23ab1345f | 260 | l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(local_cid); |
| va009039 | 0:1ed23ab1345f | 261 | if (!channel) { |
| va009039 | 0:1ed23ab1345f | 262 | log_error("l2cap_send_internal no channel for cid %u\n", local_cid); |
| va009039 | 0:1ed23ab1345f | 263 | return -1; // TODO: define error |
| va009039 | 0:1ed23ab1345f | 264 | } |
| va009039 | 0:1ed23ab1345f | 265 | |
| va009039 | 0:1ed23ab1345f | 266 | if (channel->packets_granted == 0){ |
| va009039 | 0:1ed23ab1345f | 267 | log_error("l2cap_send_internal cid %u, no credits!\n", local_cid); |
| va009039 | 0:1ed23ab1345f | 268 | return -1; // TODO: define error |
| va009039 | 0:1ed23ab1345f | 269 | } |
| va009039 | 0:1ed23ab1345f | 270 | |
| va009039 | 0:1ed23ab1345f | 271 | --channel->packets_granted; |
| va009039 | 0:1ed23ab1345f | 272 | |
| va009039 | 0:1ed23ab1345f | 273 | log_debug("l2cap_send_internal cid %u, handle %u, 1 credit used, credits left %u;\n", |
| va009039 | 0:1ed23ab1345f | 274 | local_cid, channel->handle, channel->packets_granted); |
| va009039 | 0:1ed23ab1345f | 275 | |
| va009039 | 0:1ed23ab1345f | 276 | uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer(); |
| va009039 | 0:1ed23ab1345f | 277 | |
| va009039 | 0:1ed23ab1345f | 278 | // 0 - Connection handle : PB=10 : BC=00 |
| va009039 | 0:1ed23ab1345f | 279 | bt_store_16(acl_buffer, 0, channel->handle | (2 << 12) | (0 << 14)); |
| va009039 | 0:1ed23ab1345f | 280 | // 2 - ACL length |
| va009039 | 0:1ed23ab1345f | 281 | bt_store_16(acl_buffer, 2, len + 4); |
| va009039 | 0:1ed23ab1345f | 282 | // 4 - L2CAP packet length |
| va009039 | 0:1ed23ab1345f | 283 | bt_store_16(acl_buffer, 4, len + 0); |
| va009039 | 0:1ed23ab1345f | 284 | // 6 - L2CAP channel DEST |
| va009039 | 0:1ed23ab1345f | 285 | bt_store_16(acl_buffer, 6, channel->remote_cid); |
| va009039 | 0:1ed23ab1345f | 286 | // send |
| va009039 | 0:1ed23ab1345f | 287 | int err = hci_send_acl_packet(acl_buffer, len+8); |
| va009039 | 0:1ed23ab1345f | 288 | |
| va009039 | 0:1ed23ab1345f | 289 | l2cap_hand_out_credits(); |
| va009039 | 0:1ed23ab1345f | 290 | |
| va009039 | 0:1ed23ab1345f | 291 | return err; |
| va009039 | 0:1ed23ab1345f | 292 | } |
| va009039 | 0:1ed23ab1345f | 293 | |
| va009039 | 0:1ed23ab1345f | 294 | int l2cap_send_prepared_connectionless(uint16_t handle, uint16_t cid, uint16_t len){ |
| va009039 | 0:1ed23ab1345f | 295 | |
| va009039 | 0:1ed23ab1345f | 296 | if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){ |
| va009039 | 0:1ed23ab1345f | 297 | log_info("l2cap_send_prepared_to_handle cid %u, cannot send\n", cid); |
| va009039 | 0:1ed23ab1345f | 298 | return BTSTACK_ACL_BUFFERS_FULL; |
| va009039 | 0:1ed23ab1345f | 299 | } |
| va009039 | 0:1ed23ab1345f | 300 | |
| va009039 | 0:1ed23ab1345f | 301 | log_debug("l2cap_send_prepared_to_handle cid %u, handle %u\n", cid, handle); |
| va009039 | 0:1ed23ab1345f | 302 | |
| va009039 | 0:1ed23ab1345f | 303 | uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer(); |
| va009039 | 0:1ed23ab1345f | 304 | |
| va009039 | 0:1ed23ab1345f | 305 | // 0 - Connection handle : PB=10 : BC=00 |
| va009039 | 0:1ed23ab1345f | 306 | bt_store_16(acl_buffer, 0, handle | (2 << 12) | (0 << 14)); |
| va009039 | 0:1ed23ab1345f | 307 | // 2 - ACL length |
| va009039 | 0:1ed23ab1345f | 308 | bt_store_16(acl_buffer, 2, len + 4); |
| va009039 | 0:1ed23ab1345f | 309 | // 4 - L2CAP packet length |
| va009039 | 0:1ed23ab1345f | 310 | bt_store_16(acl_buffer, 4, len + 0); |
| va009039 | 0:1ed23ab1345f | 311 | // 6 - L2CAP channel DEST |
| va009039 | 0:1ed23ab1345f | 312 | bt_store_16(acl_buffer, 6, cid); |
| va009039 | 0:1ed23ab1345f | 313 | // send |
| va009039 | 0:1ed23ab1345f | 314 | int err = hci_send_acl_packet(acl_buffer, len+8); |
| va009039 | 0:1ed23ab1345f | 315 | |
| va009039 | 0:1ed23ab1345f | 316 | l2cap_hand_out_credits(); |
| va009039 | 0:1ed23ab1345f | 317 | |
| va009039 | 0:1ed23ab1345f | 318 | return err; |
| va009039 | 0:1ed23ab1345f | 319 | } |
| va009039 | 0:1ed23ab1345f | 320 | |
| va009039 | 0:1ed23ab1345f | 321 | int l2cap_send_internal(uint16_t local_cid, uint8_t *data, uint16_t len){ |
| va009039 | 0:1ed23ab1345f | 322 | |
| va009039 | 0:1ed23ab1345f | 323 | if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){ |
| va009039 | 0:1ed23ab1345f | 324 | log_info("l2cap_send_internal cid %u, cannot send\n", local_cid); |
| va009039 | 0:1ed23ab1345f | 325 | return BTSTACK_ACL_BUFFERS_FULL; |
| va009039 | 0:1ed23ab1345f | 326 | } |
| va009039 | 0:1ed23ab1345f | 327 | |
| va009039 | 0:1ed23ab1345f | 328 | uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer(); |
| va009039 | 0:1ed23ab1345f | 329 | |
| va009039 | 0:1ed23ab1345f | 330 | memcpy(&acl_buffer[8], data, len); |
| va009039 | 0:1ed23ab1345f | 331 | |
| va009039 | 0:1ed23ab1345f | 332 | return l2cap_send_prepared(local_cid, len); |
| va009039 | 0:1ed23ab1345f | 333 | } |
| va009039 | 0:1ed23ab1345f | 334 | |
| va009039 | 0:1ed23ab1345f | 335 | int l2cap_send_connectionless(uint16_t handle, uint16_t cid, uint8_t *data, uint16_t len){ |
| va009039 | 0:1ed23ab1345f | 336 | |
| va009039 | 0:1ed23ab1345f | 337 | if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)){ |
| va009039 | 0:1ed23ab1345f | 338 | log_info("l2cap_send_internal cid %u, cannot send\n", cid); |
| va009039 | 0:1ed23ab1345f | 339 | return BTSTACK_ACL_BUFFERS_FULL; |
| va009039 | 0:1ed23ab1345f | 340 | } |
| va009039 | 0:1ed23ab1345f | 341 | |
| va009039 | 0:1ed23ab1345f | 342 | uint8_t *acl_buffer = hci_get_outgoing_acl_packet_buffer(); |
| va009039 | 0:1ed23ab1345f | 343 | |
| va009039 | 0:1ed23ab1345f | 344 | memcpy(&acl_buffer[8], data, len); |
| va009039 | 0:1ed23ab1345f | 345 | |
| va009039 | 0:1ed23ab1345f | 346 | return l2cap_send_prepared_connectionless(handle, cid, len); |
| va009039 | 0:1ed23ab1345f | 347 | } |
| va009039 | 0:1ed23ab1345f | 348 | |
| va009039 | 0:1ed23ab1345f | 349 | static inline void channelStateVarSetFlag(l2cap_channel_t *channel, L2CAP_CHANNEL_STATE_VAR flag){ |
| va009039 | 0:1ed23ab1345f | 350 | channel->state_var = (L2CAP_CHANNEL_STATE_VAR) (channel->state_var | flag); |
| va009039 | 0:1ed23ab1345f | 351 | } |
| va009039 | 0:1ed23ab1345f | 352 | |
| va009039 | 0:1ed23ab1345f | 353 | static inline void channelStateVarClearFlag(l2cap_channel_t *channel, L2CAP_CHANNEL_STATE_VAR flag){ |
| va009039 | 0:1ed23ab1345f | 354 | channel->state_var = (L2CAP_CHANNEL_STATE_VAR) (channel->state_var & ~flag); |
| va009039 | 0:1ed23ab1345f | 355 | } |
| va009039 | 0:1ed23ab1345f | 356 | |
| va009039 | 0:1ed23ab1345f | 357 | |
| va009039 | 0:1ed23ab1345f | 358 | |
| va009039 | 0:1ed23ab1345f | 359 | // MARK: L2CAP_RUN |
| va009039 | 0:1ed23ab1345f | 360 | // process outstanding signaling tasks |
| va009039 | 0:1ed23ab1345f | 361 | void l2cap_run(void){ |
| va009039 | 0:1ed23ab1345f | 362 | |
| va009039 | 0:1ed23ab1345f | 363 | // check pending signaling responses |
| va009039 | 0:1ed23ab1345f | 364 | while (signaling_responses_pending){ |
| va009039 | 0:1ed23ab1345f | 365 | |
| va009039 | 0:1ed23ab1345f | 366 | if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)) break; |
| va009039 | 0:1ed23ab1345f | 367 | |
| va009039 | 0:1ed23ab1345f | 368 | hci_con_handle_t handle = signaling_responses[0].handle; |
| va009039 | 0:1ed23ab1345f | 369 | uint8_t sig_id = signaling_responses[0].sig_id; |
| va009039 | 0:1ed23ab1345f | 370 | uint16_t infoType = signaling_responses[0].data; // INFORMATION_REQUEST |
| va009039 | 0:1ed23ab1345f | 371 | uint16_t result = signaling_responses[0].data; // CONNECTION_REQUEST |
| va009039 | 0:1ed23ab1345f | 372 | |
| va009039 | 0:1ed23ab1345f | 373 | switch (signaling_responses[0].code){ |
| va009039 | 0:1ed23ab1345f | 374 | case CONNECTION_REQUEST: |
| va009039 | 0:1ed23ab1345f | 375 | l2cap_send_signaling_packet(handle, CONNECTION_RESPONSE, sig_id, 0, 0, result, 0); |
| va009039 | 0:1ed23ab1345f | 376 | break; |
| va009039 | 0:1ed23ab1345f | 377 | case ECHO_REQUEST: |
| va009039 | 0:1ed23ab1345f | 378 | l2cap_send_signaling_packet(handle, ECHO_RESPONSE, sig_id, 0, NULL); |
| va009039 | 0:1ed23ab1345f | 379 | break; |
| va009039 | 0:1ed23ab1345f | 380 | case INFORMATION_REQUEST: |
| va009039 | 0:1ed23ab1345f | 381 | if (infoType == 2) { |
| va009039 | 0:1ed23ab1345f | 382 | uint32_t features = 0; |
| va009039 | 0:1ed23ab1345f | 383 | // extended features request supported, however no features present |
| va009039 | 0:1ed23ab1345f | 384 | l2cap_send_signaling_packet(handle, INFORMATION_RESPONSE, sig_id, infoType, 0, 4, &features); |
| va009039 | 0:1ed23ab1345f | 385 | } else { |
| va009039 | 0:1ed23ab1345f | 386 | // all other types are not supported |
| va009039 | 0:1ed23ab1345f | 387 | l2cap_send_signaling_packet(handle, INFORMATION_RESPONSE, sig_id, infoType, 1, 0, NULL); |
| va009039 | 0:1ed23ab1345f | 388 | } |
| va009039 | 0:1ed23ab1345f | 389 | break; |
| va009039 | 0:1ed23ab1345f | 390 | default: |
| va009039 | 0:1ed23ab1345f | 391 | // should not happen |
| va009039 | 0:1ed23ab1345f | 392 | break; |
| va009039 | 0:1ed23ab1345f | 393 | } |
| va009039 | 0:1ed23ab1345f | 394 | |
| va009039 | 0:1ed23ab1345f | 395 | // remove first item |
| va009039 | 0:1ed23ab1345f | 396 | signaling_responses_pending--; |
| va009039 | 0:1ed23ab1345f | 397 | int i; |
| va009039 | 0:1ed23ab1345f | 398 | for (i=0; i < signaling_responses_pending; i++){ |
| va009039 | 0:1ed23ab1345f | 399 | memcpy(&signaling_responses[i], &signaling_responses[i+1], sizeof(l2cap_signaling_response_t)); |
| va009039 | 0:1ed23ab1345f | 400 | } |
| va009039 | 0:1ed23ab1345f | 401 | } |
| va009039 | 0:1ed23ab1345f | 402 | |
| va009039 | 0:1ed23ab1345f | 403 | uint8_t config_options[4]; |
| va009039 | 0:1ed23ab1345f | 404 | linked_item_t *it; |
| va009039 | 0:1ed23ab1345f | 405 | linked_item_t *next; |
| va009039 | 0:1ed23ab1345f | 406 | for (it = (linked_item_t *) l2cap_channels; it ; it = next){ |
| va009039 | 0:1ed23ab1345f | 407 | next = it->next; // cache next item as current item might get freed |
| va009039 | 0:1ed23ab1345f | 408 | |
| va009039 | 0:1ed23ab1345f | 409 | if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) break; |
| va009039 | 0:1ed23ab1345f | 410 | if (!hci_can_send_packet_now(HCI_ACL_DATA_PACKET)) break; |
| va009039 | 0:1ed23ab1345f | 411 | |
| va009039 | 0:1ed23ab1345f | 412 | l2cap_channel_t * channel = (l2cap_channel_t *) it; |
| va009039 | 0:1ed23ab1345f | 413 | |
| va009039 | 0:1ed23ab1345f | 414 | // log_info("l2cap_run: state %u, var 0x%02x\n", channel->state, channel->state_var); |
| va009039 | 0:1ed23ab1345f | 415 | |
| va009039 | 0:1ed23ab1345f | 416 | |
| va009039 | 0:1ed23ab1345f | 417 | switch (channel->state){ |
| va009039 | 0:1ed23ab1345f | 418 | |
| va009039 | 0:1ed23ab1345f | 419 | case L2CAP_STATE_WILL_SEND_CREATE_CONNECTION: |
| va009039 | 0:1ed23ab1345f | 420 | // send connection request - set state first |
| va009039 | 0:1ed23ab1345f | 421 | channel->state = L2CAP_STATE_WAIT_CONNECTION_COMPLETE; |
| va009039 | 0:1ed23ab1345f | 422 | // BD_ADDR, Packet_Type, Page_Scan_Repetition_Mode, Reserved, Clock_Offset, Allow_Role_Switch |
| va009039 | 0:1ed23ab1345f | 423 | hci_send_cmd(&hci_create_connection, channel->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); |
| va009039 | 0:1ed23ab1345f | 424 | break; |
| va009039 | 0:1ed23ab1345f | 425 | |
| va009039 | 0:1ed23ab1345f | 426 | case L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_DECLINE: |
| va009039 | 0:1ed23ab1345f | 427 | l2cap_send_signaling_packet(channel->handle, CONNECTION_RESPONSE, channel->remote_sig_id, 0, 0, channel->reason, 0); |
| va009039 | 0:1ed23ab1345f | 428 | // discard channel - l2cap_finialize_channel_close without sending l2cap close event |
| va009039 | 0:1ed23ab1345f | 429 | linked_list_remove(&l2cap_channels, (linked_item_t *) channel); // -- remove from list |
| va009039 | 0:1ed23ab1345f | 430 | btstack_memory_l2cap_channel_free(channel); |
| va009039 | 0:1ed23ab1345f | 431 | break; |
| va009039 | 0:1ed23ab1345f | 432 | |
| va009039 | 0:1ed23ab1345f | 433 | case L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_ACCEPT: |
| va009039 | 0:1ed23ab1345f | 434 | channel->state = L2CAP_STATE_CONFIG; |
| va009039 | 0:1ed23ab1345f | 435 | channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ); |
| va009039 | 0:1ed23ab1345f | 436 | l2cap_send_signaling_packet(channel->handle, CONNECTION_RESPONSE, channel->remote_sig_id, channel->local_cid, channel->remote_cid, 0, 0); |
| va009039 | 0:1ed23ab1345f | 437 | break; |
| va009039 | 0:1ed23ab1345f | 438 | |
| va009039 | 0:1ed23ab1345f | 439 | case L2CAP_STATE_WILL_SEND_CONNECTION_REQUEST: |
| va009039 | 0:1ed23ab1345f | 440 | // success, start l2cap handshake |
| va009039 | 0:1ed23ab1345f | 441 | channel->local_sig_id = l2cap_next_sig_id(); |
| va009039 | 0:1ed23ab1345f | 442 | channel->state = L2CAP_STATE_WAIT_CONNECT_RSP; |
| va009039 | 0:1ed23ab1345f | 443 | l2cap_send_signaling_packet( channel->handle, CONNECTION_REQUEST, channel->local_sig_id, channel->psm, channel->local_cid); |
| va009039 | 0:1ed23ab1345f | 444 | break; |
| va009039 | 0:1ed23ab1345f | 445 | |
| va009039 | 0:1ed23ab1345f | 446 | case L2CAP_STATE_CONFIG: |
| va009039 | 0:1ed23ab1345f | 447 | if (channel->state_var & L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP){ |
| va009039 | 0:1ed23ab1345f | 448 | channelStateVarClearFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP); |
| va009039 | 0:1ed23ab1345f | 449 | channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SENT_CONF_RSP); |
| va009039 | 0:1ed23ab1345f | 450 | l2cap_send_signaling_packet(channel->handle, CONFIGURE_RESPONSE, channel->remote_sig_id, channel->remote_cid, 0, 0, 0, NULL); |
| va009039 | 0:1ed23ab1345f | 451 | } |
| va009039 | 0:1ed23ab1345f | 452 | else if (channel->state_var & L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ){ |
| va009039 | 0:1ed23ab1345f | 453 | channelStateVarClearFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ); |
| va009039 | 0:1ed23ab1345f | 454 | channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SENT_CONF_REQ); |
| va009039 | 0:1ed23ab1345f | 455 | channel->local_sig_id = l2cap_next_sig_id(); |
| va009039 | 0:1ed23ab1345f | 456 | config_options[0] = 1; // MTU |
| va009039 | 0:1ed23ab1345f | 457 | config_options[1] = 2; // len param |
| va009039 | 0:1ed23ab1345f | 458 | bt_store_16( (uint8_t*)&config_options, 2, channel->local_mtu); |
| va009039 | 0:1ed23ab1345f | 459 | l2cap_send_signaling_packet(channel->handle, CONFIGURE_REQUEST, channel->local_sig_id, channel->remote_cid, 0, 4, &config_options); |
| va009039 | 0:1ed23ab1345f | 460 | } |
| va009039 | 0:1ed23ab1345f | 461 | if (l2cap_channel_ready_for_open(channel)){ |
| va009039 | 0:1ed23ab1345f | 462 | channel->state = L2CAP_STATE_OPEN; |
| va009039 | 0:1ed23ab1345f | 463 | l2cap_emit_channel_opened(channel, 0); // success |
| va009039 | 0:1ed23ab1345f | 464 | l2cap_emit_credits(channel, 1); |
| va009039 | 0:1ed23ab1345f | 465 | } |
| va009039 | 0:1ed23ab1345f | 466 | break; |
| va009039 | 0:1ed23ab1345f | 467 | |
| va009039 | 0:1ed23ab1345f | 468 | case L2CAP_STATE_WILL_SEND_DISCONNECT_RESPONSE: |
| va009039 | 0:1ed23ab1345f | 469 | l2cap_send_signaling_packet( channel->handle, DISCONNECTION_RESPONSE, channel->remote_sig_id, channel->local_cid, channel->remote_cid); |
| va009039 | 0:1ed23ab1345f | 470 | l2cap_finialize_channel_close(channel); // -- remove from list |
| va009039 | 0:1ed23ab1345f | 471 | break; |
| va009039 | 0:1ed23ab1345f | 472 | |
| va009039 | 0:1ed23ab1345f | 473 | case L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST: |
| va009039 | 0:1ed23ab1345f | 474 | channel->local_sig_id = l2cap_next_sig_id(); |
| va009039 | 0:1ed23ab1345f | 475 | channel->state = L2CAP_STATE_WAIT_DISCONNECT; |
| va009039 | 0:1ed23ab1345f | 476 | l2cap_send_signaling_packet( channel->handle, DISCONNECTION_REQUEST, channel->local_sig_id, channel->remote_cid, channel->local_cid); |
| va009039 | 0:1ed23ab1345f | 477 | break; |
| va009039 | 0:1ed23ab1345f | 478 | default: |
| va009039 | 0:1ed23ab1345f | 479 | break; |
| va009039 | 0:1ed23ab1345f | 480 | } |
| va009039 | 0:1ed23ab1345f | 481 | } |
| va009039 | 0:1ed23ab1345f | 482 | } |
| va009039 | 0:1ed23ab1345f | 483 | |
| va009039 | 0:1ed23ab1345f | 484 | uint16_t l2cap_max_mtu(void){ |
| va009039 | 0:1ed23ab1345f | 485 | return hci_max_acl_data_packet_length() - L2CAP_HEADER_SIZE; |
| va009039 | 0:1ed23ab1345f | 486 | } |
| va009039 | 0:1ed23ab1345f | 487 | |
| va009039 | 0:1ed23ab1345f | 488 | // open outgoing L2CAP channel |
| va009039 | 0:1ed23ab1345f | 489 | void l2cap_create_channel_internal(void * connection, btstack_packet_handler_t packet_handler, |
| va009039 | 0:1ed23ab1345f | 490 | bd_addr_t address, uint16_t psm, uint16_t mtu){ |
| va009039 | 0:1ed23ab1345f | 491 | |
| va009039 | 0:1ed23ab1345f | 492 | // alloc structure |
| va009039 | 0:1ed23ab1345f | 493 | l2cap_channel_t * chan = (l2cap_channel_t*) btstack_memory_l2cap_channel_get(); |
| va009039 | 0:1ed23ab1345f | 494 | if (!chan) { |
| va009039 | 0:1ed23ab1345f | 495 | // emit error event |
| va009039 | 0:1ed23ab1345f | 496 | l2cap_channel_t dummy_channel; |
| va009039 | 0:1ed23ab1345f | 497 | BD_ADDR_COPY(dummy_channel.address, address); |
| va009039 | 0:1ed23ab1345f | 498 | dummy_channel.psm = psm; |
| va009039 | 0:1ed23ab1345f | 499 | l2cap_emit_channel_opened(&dummy_channel, BTSTACK_MEMORY_ALLOC_FAILED); |
| va009039 | 0:1ed23ab1345f | 500 | return; |
| va009039 | 0:1ed23ab1345f | 501 | } |
| va009039 | 0:1ed23ab1345f | 502 | // limit local mtu to max acl packet length |
| va009039 | 0:1ed23ab1345f | 503 | if (mtu > l2cap_max_mtu()) { |
| va009039 | 0:1ed23ab1345f | 504 | mtu = l2cap_max_mtu(); |
| va009039 | 0:1ed23ab1345f | 505 | } |
| va009039 | 0:1ed23ab1345f | 506 | |
| va009039 | 0:1ed23ab1345f | 507 | // fill in |
| va009039 | 0:1ed23ab1345f | 508 | BD_ADDR_COPY(chan->address, address); |
| va009039 | 0:1ed23ab1345f | 509 | chan->psm = psm; |
| va009039 | 0:1ed23ab1345f | 510 | chan->handle = 0; |
| va009039 | 0:1ed23ab1345f | 511 | chan->connection = connection; |
| va009039 | 0:1ed23ab1345f | 512 | chan->packet_handler = packet_handler; |
| va009039 | 0:1ed23ab1345f | 513 | chan->remote_mtu = L2CAP_MINIMAL_MTU; |
| va009039 | 0:1ed23ab1345f | 514 | chan->local_mtu = mtu; |
| va009039 | 0:1ed23ab1345f | 515 | chan->packets_granted = 0; |
| va009039 | 0:1ed23ab1345f | 516 | |
| va009039 | 0:1ed23ab1345f | 517 | // set initial state |
| va009039 | 0:1ed23ab1345f | 518 | chan->state = L2CAP_STATE_WILL_SEND_CREATE_CONNECTION; |
| va009039 | 0:1ed23ab1345f | 519 | chan->state_var = L2CAP_CHANNEL_STATE_VAR_NONE; |
| va009039 | 0:1ed23ab1345f | 520 | chan->remote_sig_id = L2CAP_SIG_ID_INVALID; |
| va009039 | 0:1ed23ab1345f | 521 | chan->local_sig_id = L2CAP_SIG_ID_INVALID; |
| va009039 | 0:1ed23ab1345f | 522 | |
| va009039 | 0:1ed23ab1345f | 523 | // add to connections list |
| va009039 | 0:1ed23ab1345f | 524 | linked_list_add(&l2cap_channels, (linked_item_t *) chan); |
| va009039 | 0:1ed23ab1345f | 525 | |
| va009039 | 0:1ed23ab1345f | 526 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 527 | } |
| va009039 | 0:1ed23ab1345f | 528 | |
| va009039 | 0:1ed23ab1345f | 529 | void l2cap_disconnect_internal(uint16_t local_cid, uint8_t reason){ |
| va009039 | 0:1ed23ab1345f | 530 | // find channel for local_cid |
| va009039 | 0:1ed23ab1345f | 531 | l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(local_cid); |
| va009039 | 0:1ed23ab1345f | 532 | if (channel) { |
| va009039 | 0:1ed23ab1345f | 533 | channel->state = L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST; |
| va009039 | 0:1ed23ab1345f | 534 | } |
| va009039 | 0:1ed23ab1345f | 535 | // process |
| va009039 | 0:1ed23ab1345f | 536 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 537 | } |
| va009039 | 0:1ed23ab1345f | 538 | |
| va009039 | 0:1ed23ab1345f | 539 | static void l2cap_handle_connection_failed_for_addr(bd_addr_t address, uint8_t status){ |
| va009039 | 0:1ed23ab1345f | 540 | linked_item_t *it = (linked_item_t *) &l2cap_channels; |
| va009039 | 0:1ed23ab1345f | 541 | while (it->next){ |
| va009039 | 0:1ed23ab1345f | 542 | l2cap_channel_t * channel = (l2cap_channel_t *) it->next; |
| va009039 | 0:1ed23ab1345f | 543 | if ( ! BD_ADDR_CMP( channel->address, address) ){ |
| va009039 | 0:1ed23ab1345f | 544 | if (channel->state == L2CAP_STATE_WAIT_CONNECTION_COMPLETE || channel->state == L2CAP_STATE_WILL_SEND_CREATE_CONNECTION) { |
| va009039 | 0:1ed23ab1345f | 545 | // failure, forward error code |
| va009039 | 0:1ed23ab1345f | 546 | l2cap_emit_channel_opened(channel, status); |
| va009039 | 0:1ed23ab1345f | 547 | // discard channel |
| va009039 | 0:1ed23ab1345f | 548 | it->next = it->next->next; |
| va009039 | 0:1ed23ab1345f | 549 | btstack_memory_l2cap_channel_free(channel); |
| va009039 | 0:1ed23ab1345f | 550 | } |
| va009039 | 0:1ed23ab1345f | 551 | } else { |
| va009039 | 0:1ed23ab1345f | 552 | it = it->next; |
| va009039 | 0:1ed23ab1345f | 553 | } |
| va009039 | 0:1ed23ab1345f | 554 | } |
| va009039 | 0:1ed23ab1345f | 555 | } |
| va009039 | 0:1ed23ab1345f | 556 | |
| va009039 | 0:1ed23ab1345f | 557 | static void l2cap_handle_connection_success_for_addr(bd_addr_t address, hci_con_handle_t handle){ |
| va009039 | 0:1ed23ab1345f | 558 | linked_item_t *it; |
| va009039 | 0:1ed23ab1345f | 559 | for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){ |
| va009039 | 0:1ed23ab1345f | 560 | l2cap_channel_t * channel = (l2cap_channel_t *) it; |
| va009039 | 0:1ed23ab1345f | 561 | if ( ! BD_ADDR_CMP( channel->address, address) ){ |
| va009039 | 0:1ed23ab1345f | 562 | if (channel->state == L2CAP_STATE_WAIT_CONNECTION_COMPLETE || channel->state == L2CAP_STATE_WILL_SEND_CREATE_CONNECTION) { |
| va009039 | 0:1ed23ab1345f | 563 | // success, start l2cap handshake |
| va009039 | 0:1ed23ab1345f | 564 | channel->state = L2CAP_STATE_WILL_SEND_CONNECTION_REQUEST; |
| va009039 | 0:1ed23ab1345f | 565 | channel->handle = handle; |
| va009039 | 0:1ed23ab1345f | 566 | channel->local_cid = l2cap_next_local_cid(); |
| va009039 | 0:1ed23ab1345f | 567 | } |
| va009039 | 0:1ed23ab1345f | 568 | } |
| va009039 | 0:1ed23ab1345f | 569 | } |
| va009039 | 0:1ed23ab1345f | 570 | // process |
| va009039 | 0:1ed23ab1345f | 571 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 572 | } |
| va009039 | 0:1ed23ab1345f | 573 | |
| va009039 | 0:1ed23ab1345f | 574 | void l2cap_event_handler( uint8_t *packet, uint16_t size ){ |
| va009039 | 0:1ed23ab1345f | 575 | |
| va009039 | 0:1ed23ab1345f | 576 | bd_addr_t address; |
| va009039 | 0:1ed23ab1345f | 577 | hci_con_handle_t handle; |
| va009039 | 0:1ed23ab1345f | 578 | l2cap_channel_t * channel; |
| va009039 | 0:1ed23ab1345f | 579 | linked_item_t *it; |
| va009039 | 0:1ed23ab1345f | 580 | int hci_con_used; |
| va009039 | 0:1ed23ab1345f | 581 | |
| va009039 | 0:1ed23ab1345f | 582 | switch(packet[0]){ |
| va009039 | 0:1ed23ab1345f | 583 | |
| va009039 | 0:1ed23ab1345f | 584 | // handle connection complete events |
| va009039 | 0:1ed23ab1345f | 585 | case HCI_EVENT_CONNECTION_COMPLETE: |
| va009039 | 0:1ed23ab1345f | 586 | bt_flip_addr(address, &packet[5]); |
| va009039 | 0:1ed23ab1345f | 587 | if (packet[2] == 0){ |
| va009039 | 0:1ed23ab1345f | 588 | handle = READ_BT_16(packet, 3); |
| va009039 | 0:1ed23ab1345f | 589 | l2cap_handle_connection_success_for_addr(address, handle); |
| va009039 | 0:1ed23ab1345f | 590 | } else { |
| va009039 | 0:1ed23ab1345f | 591 | l2cap_handle_connection_failed_for_addr(address, packet[2]); |
| va009039 | 0:1ed23ab1345f | 592 | } |
| va009039 | 0:1ed23ab1345f | 593 | break; |
| va009039 | 0:1ed23ab1345f | 594 | |
| va009039 | 0:1ed23ab1345f | 595 | // handle successful create connection cancel command |
| va009039 | 0:1ed23ab1345f | 596 | case HCI_EVENT_COMMAND_COMPLETE: |
| va009039 | 0:1ed23ab1345f | 597 | if ( COMMAND_COMPLETE_EVENT(packet, hci_create_connection_cancel) ) { |
| va009039 | 0:1ed23ab1345f | 598 | if (packet[5] == 0){ |
| va009039 | 0:1ed23ab1345f | 599 | bt_flip_addr(address, &packet[6]); |
| va009039 | 0:1ed23ab1345f | 600 | // CONNECTION TERMINATED BY LOCAL HOST (0X16) |
| va009039 | 0:1ed23ab1345f | 601 | l2cap_handle_connection_failed_for_addr(address, 0x16); |
| va009039 | 0:1ed23ab1345f | 602 | } |
| va009039 | 0:1ed23ab1345f | 603 | } |
| va009039 | 0:1ed23ab1345f | 604 | l2cap_run(); // try sending signaling packets first |
| va009039 | 0:1ed23ab1345f | 605 | break; |
| va009039 | 0:1ed23ab1345f | 606 | |
| va009039 | 0:1ed23ab1345f | 607 | case HCI_EVENT_COMMAND_STATUS: |
| va009039 | 0:1ed23ab1345f | 608 | l2cap_run(); // try sending signaling packets first |
| va009039 | 0:1ed23ab1345f | 609 | break; |
| va009039 | 0:1ed23ab1345f | 610 | |
| va009039 | 0:1ed23ab1345f | 611 | // handle disconnection complete events |
| va009039 | 0:1ed23ab1345f | 612 | case HCI_EVENT_DISCONNECTION_COMPLETE: |
| va009039 | 0:1ed23ab1345f | 613 | // send l2cap disconnect events for all channels on this handle |
| va009039 | 0:1ed23ab1345f | 614 | handle = READ_BT_16(packet, 3); |
| va009039 | 0:1ed23ab1345f | 615 | it = (linked_item_t *) &l2cap_channels; |
| va009039 | 0:1ed23ab1345f | 616 | while (it->next){ |
| va009039 | 0:1ed23ab1345f | 617 | l2cap_channel_t * channel = (l2cap_channel_t *) it->next; |
| va009039 | 0:1ed23ab1345f | 618 | if ( channel->handle == handle ){ |
| va009039 | 0:1ed23ab1345f | 619 | // update prev item before free'ing next element - don't call l2cap_finalize_channel_close |
| va009039 | 0:1ed23ab1345f | 620 | it->next = it->next->next; |
| va009039 | 0:1ed23ab1345f | 621 | l2cap_emit_channel_closed(channel); |
| va009039 | 0:1ed23ab1345f | 622 | btstack_memory_l2cap_channel_free(channel); |
| va009039 | 0:1ed23ab1345f | 623 | } else { |
| va009039 | 0:1ed23ab1345f | 624 | it = it->next; |
| va009039 | 0:1ed23ab1345f | 625 | } |
| va009039 | 0:1ed23ab1345f | 626 | } |
| va009039 | 0:1ed23ab1345f | 627 | break; |
| va009039 | 0:1ed23ab1345f | 628 | |
| va009039 | 0:1ed23ab1345f | 629 | case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: |
| va009039 | 0:1ed23ab1345f | 630 | l2cap_run(); // try sending signaling packets first |
| va009039 | 0:1ed23ab1345f | 631 | l2cap_hand_out_credits(); |
| va009039 | 0:1ed23ab1345f | 632 | break; |
| va009039 | 0:1ed23ab1345f | 633 | |
| va009039 | 0:1ed23ab1345f | 634 | // HCI Connection Timeouts |
| va009039 | 0:1ed23ab1345f | 635 | case L2CAP_EVENT_TIMEOUT_CHECK: |
| va009039 | 0:1ed23ab1345f | 636 | handle = READ_BT_16(packet, 2); |
| va009039 | 0:1ed23ab1345f | 637 | if (hci_authentication_active_for_handle(handle)) break; |
| va009039 | 0:1ed23ab1345f | 638 | hci_con_used = 0; |
| va009039 | 0:1ed23ab1345f | 639 | for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){ |
| va009039 | 0:1ed23ab1345f | 640 | channel = (l2cap_channel_t *) it; |
| va009039 | 0:1ed23ab1345f | 641 | if (channel->handle == handle) { |
| va009039 | 0:1ed23ab1345f | 642 | hci_con_used = 1; |
| va009039 | 0:1ed23ab1345f | 643 | } |
| va009039 | 0:1ed23ab1345f | 644 | } |
| va009039 | 0:1ed23ab1345f | 645 | if (hci_con_used) break; |
| va009039 | 0:1ed23ab1345f | 646 | if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) break; |
| va009039 | 0:1ed23ab1345f | 647 | hci_send_cmd(&hci_disconnect, handle, 0x13); // remote closed connection |
| va009039 | 0:1ed23ab1345f | 648 | break; |
| va009039 | 0:1ed23ab1345f | 649 | |
| va009039 | 0:1ed23ab1345f | 650 | case DAEMON_EVENT_HCI_PACKET_SENT: |
| va009039 | 0:1ed23ab1345f | 651 | for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){ |
| va009039 | 0:1ed23ab1345f | 652 | channel = (l2cap_channel_t *) it; |
| va009039 | 0:1ed23ab1345f | 653 | if (channel->packet_handler) { |
| va009039 | 0:1ed23ab1345f | 654 | (* (channel->packet_handler))(HCI_EVENT_PACKET, channel->local_cid, packet, size); |
| va009039 | 0:1ed23ab1345f | 655 | } |
| va009039 | 0:1ed23ab1345f | 656 | } |
| va009039 | 0:1ed23ab1345f | 657 | if (attribute_protocol_packet_handler) { |
| va009039 | 0:1ed23ab1345f | 658 | (*attribute_protocol_packet_handler)(HCI_EVENT_PACKET, 0, packet, size); |
| va009039 | 0:1ed23ab1345f | 659 | } |
| va009039 | 0:1ed23ab1345f | 660 | if (security_protocol_packet_handler) { |
| va009039 | 0:1ed23ab1345f | 661 | (*security_protocol_packet_handler)(HCI_EVENT_PACKET, 0, packet, size); |
| va009039 | 0:1ed23ab1345f | 662 | } |
| va009039 | 0:1ed23ab1345f | 663 | break; |
| va009039 | 0:1ed23ab1345f | 664 | |
| va009039 | 0:1ed23ab1345f | 665 | default: |
| va009039 | 0:1ed23ab1345f | 666 | break; |
| va009039 | 0:1ed23ab1345f | 667 | } |
| va009039 | 0:1ed23ab1345f | 668 | |
| va009039 | 0:1ed23ab1345f | 669 | // pass on |
| va009039 | 0:1ed23ab1345f | 670 | (*packet_handler)(NULL, HCI_EVENT_PACKET, 0, packet, size); |
| va009039 | 0:1ed23ab1345f | 671 | } |
| va009039 | 0:1ed23ab1345f | 672 | |
| va009039 | 0:1ed23ab1345f | 673 | static void l2cap_handle_disconnect_request(l2cap_channel_t *channel, uint16_t identifier){ |
| va009039 | 0:1ed23ab1345f | 674 | channel->remote_sig_id = identifier; |
| va009039 | 0:1ed23ab1345f | 675 | channel->state = L2CAP_STATE_WILL_SEND_DISCONNECT_RESPONSE; |
| va009039 | 0:1ed23ab1345f | 676 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 677 | } |
| va009039 | 0:1ed23ab1345f | 678 | |
| va009039 | 0:1ed23ab1345f | 679 | static void l2cap_register_signaling_response(hci_con_handle_t handle, uint8_t code, uint8_t sig_id, uint16_t data){ |
| va009039 | 0:1ed23ab1345f | 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 | 0:1ed23ab1345f | 681 | if (signaling_responses_pending < NR_PENDING_SIGNALING_RESPONSES) { |
| va009039 | 0:1ed23ab1345f | 682 | signaling_responses[signaling_responses_pending].handle = handle; |
| va009039 | 0:1ed23ab1345f | 683 | signaling_responses[signaling_responses_pending].code = code; |
| va009039 | 0:1ed23ab1345f | 684 | signaling_responses[signaling_responses_pending].sig_id = sig_id; |
| va009039 | 0:1ed23ab1345f | 685 | signaling_responses[signaling_responses_pending].data = data; |
| va009039 | 0:1ed23ab1345f | 686 | signaling_responses_pending++; |
| va009039 | 0:1ed23ab1345f | 687 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 688 | } |
| va009039 | 0:1ed23ab1345f | 689 | } |
| va009039 | 0:1ed23ab1345f | 690 | |
| va009039 | 0:1ed23ab1345f | 691 | static void l2cap_handle_connection_request(hci_con_handle_t handle, uint8_t sig_id, uint16_t psm, uint16_t source_cid){ |
| va009039 | 0:1ed23ab1345f | 692 | |
| va009039 | 0:1ed23ab1345f | 693 | // log_info("l2cap_handle_connection_request for handle %u, psm %u cid %u\n", handle, psm, source_cid); |
| va009039 | 0:1ed23ab1345f | 694 | l2cap_service_t *service = l2cap_get_service(psm); |
| va009039 | 0:1ed23ab1345f | 695 | if (!service) { |
| va009039 | 0:1ed23ab1345f | 696 | // 0x0002 PSM not supported |
| va009039 | 0:1ed23ab1345f | 697 | l2cap_register_signaling_response(handle, CONNECTION_REQUEST, sig_id, 0x0002); |
| va009039 | 0:1ed23ab1345f | 698 | return; |
| va009039 | 0:1ed23ab1345f | 699 | } |
| va009039 | 0:1ed23ab1345f | 700 | |
| va009039 | 0:1ed23ab1345f | 701 | hci_connection_t * hci_connection = connection_for_handle( handle ); |
| va009039 | 0:1ed23ab1345f | 702 | if (!hci_connection) { |
| va009039 | 0:1ed23ab1345f | 703 | // |
| va009039 | 0:1ed23ab1345f | 704 | log_error("no hci_connection for handle %u\n", handle); |
| va009039 | 0:1ed23ab1345f | 705 | return; |
| va009039 | 0:1ed23ab1345f | 706 | } |
| va009039 | 0:1ed23ab1345f | 707 | // alloc structure |
| va009039 | 0:1ed23ab1345f | 708 | // log_info("l2cap_handle_connection_request register channel\n"); |
| va009039 | 0:1ed23ab1345f | 709 | l2cap_channel_t * channel = (l2cap_channel_t*) btstack_memory_l2cap_channel_get(); |
| va009039 | 0:1ed23ab1345f | 710 | if (!channel){ |
| va009039 | 0:1ed23ab1345f | 711 | // 0x0004 No resources available |
| va009039 | 0:1ed23ab1345f | 712 | l2cap_register_signaling_response(handle, CONNECTION_REQUEST, sig_id, 0x0004); |
| va009039 | 0:1ed23ab1345f | 713 | return; |
| va009039 | 0:1ed23ab1345f | 714 | } |
| va009039 | 0:1ed23ab1345f | 715 | |
| va009039 | 0:1ed23ab1345f | 716 | // fill in |
| va009039 | 0:1ed23ab1345f | 717 | BD_ADDR_COPY(channel->address, hci_connection->address); |
| va009039 | 0:1ed23ab1345f | 718 | channel->psm = psm; |
| va009039 | 0:1ed23ab1345f | 719 | channel->handle = handle; |
| va009039 | 0:1ed23ab1345f | 720 | channel->connection = service->connection; |
| va009039 | 0:1ed23ab1345f | 721 | channel->packet_handler = service->packet_handler; |
| va009039 | 0:1ed23ab1345f | 722 | channel->local_cid = l2cap_next_local_cid(); |
| va009039 | 0:1ed23ab1345f | 723 | channel->remote_cid = source_cid; |
| va009039 | 0:1ed23ab1345f | 724 | channel->local_mtu = service->mtu; |
| va009039 | 0:1ed23ab1345f | 725 | channel->remote_mtu = L2CAP_DEFAULT_MTU; |
| va009039 | 0:1ed23ab1345f | 726 | channel->packets_granted = 0; |
| va009039 | 0:1ed23ab1345f | 727 | channel->remote_sig_id = sig_id; |
| va009039 | 0:1ed23ab1345f | 728 | |
| va009039 | 0:1ed23ab1345f | 729 | // limit local mtu to max acl packet length |
| va009039 | 0:1ed23ab1345f | 730 | if (channel->local_mtu > l2cap_max_mtu()) { |
| va009039 | 0:1ed23ab1345f | 731 | channel->local_mtu = l2cap_max_mtu(); |
| va009039 | 0:1ed23ab1345f | 732 | } |
| va009039 | 0:1ed23ab1345f | 733 | |
| va009039 | 0:1ed23ab1345f | 734 | // set initial state |
| va009039 | 0:1ed23ab1345f | 735 | channel->state = L2CAP_STATE_WAIT_CLIENT_ACCEPT_OR_REJECT; |
| va009039 | 0:1ed23ab1345f | 736 | channel->state_var = L2CAP_CHANNEL_STATE_VAR_NONE; |
| va009039 | 0:1ed23ab1345f | 737 | |
| va009039 | 0:1ed23ab1345f | 738 | // add to connections list |
| va009039 | 0:1ed23ab1345f | 739 | linked_list_add(&l2cap_channels, (linked_item_t *) channel); |
| va009039 | 0:1ed23ab1345f | 740 | |
| va009039 | 0:1ed23ab1345f | 741 | // emit incoming connection request |
| va009039 | 0:1ed23ab1345f | 742 | l2cap_emit_connection_request(channel); |
| va009039 | 0:1ed23ab1345f | 743 | } |
| va009039 | 0:1ed23ab1345f | 744 | |
| va009039 | 0:1ed23ab1345f | 745 | void l2cap_accept_connection_internal(uint16_t local_cid){ |
| va009039 | 0:1ed23ab1345f | 746 | l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(local_cid); |
| va009039 | 0:1ed23ab1345f | 747 | if (!channel) { |
| va009039 | 0:1ed23ab1345f | 748 | log_error("l2cap_accept_connection_internal called but local_cid 0x%x not found", local_cid); |
| va009039 | 0:1ed23ab1345f | 749 | return; |
| va009039 | 0:1ed23ab1345f | 750 | } |
| va009039 | 0:1ed23ab1345f | 751 | |
| va009039 | 0:1ed23ab1345f | 752 | channel->state = L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_ACCEPT; |
| va009039 | 0:1ed23ab1345f | 753 | |
| va009039 | 0:1ed23ab1345f | 754 | // process |
| va009039 | 0:1ed23ab1345f | 755 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 756 | } |
| va009039 | 0:1ed23ab1345f | 757 | |
| va009039 | 0:1ed23ab1345f | 758 | void l2cap_decline_connection_internal(uint16_t local_cid, uint8_t reason){ |
| va009039 | 0:1ed23ab1345f | 759 | l2cap_channel_t * channel = l2cap_get_channel_for_local_cid( local_cid); |
| va009039 | 0:1ed23ab1345f | 760 | if (!channel) { |
| va009039 | 0:1ed23ab1345f | 761 | log_error( "l2cap_decline_connection_internal called but local_cid 0x%x not found", local_cid); |
| va009039 | 0:1ed23ab1345f | 762 | return; |
| va009039 | 0:1ed23ab1345f | 763 | } |
| va009039 | 0:1ed23ab1345f | 764 | channel->state = L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_DECLINE; |
| va009039 | 0:1ed23ab1345f | 765 | channel->reason = reason; |
| va009039 | 0:1ed23ab1345f | 766 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 767 | } |
| va009039 | 0:1ed23ab1345f | 768 | |
| va009039 | 0:1ed23ab1345f | 769 | void l2cap_signaling_handle_configure_request(l2cap_channel_t *channel, uint8_t *command){ |
| va009039 | 0:1ed23ab1345f | 770 | |
| va009039 | 0:1ed23ab1345f | 771 | channel->remote_sig_id = command[L2CAP_SIGNALING_COMMAND_SIGID_OFFSET]; |
| va009039 | 0:1ed23ab1345f | 772 | |
| va009039 | 0:1ed23ab1345f | 773 | // accept the other's configuration options |
| va009039 | 0:1ed23ab1345f | 774 | uint16_t end_pos = 4 + READ_BT_16(command, L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET); |
| va009039 | 0:1ed23ab1345f | 775 | uint16_t pos = 8; |
| va009039 | 0:1ed23ab1345f | 776 | while (pos < end_pos){ |
| va009039 | 0:1ed23ab1345f | 777 | uint8_t type = command[pos++]; |
| va009039 | 0:1ed23ab1345f | 778 | uint8_t length = command[pos++]; |
| va009039 | 0:1ed23ab1345f | 779 | // MTU { type(8): 1, len(8):2, MTU(16) } |
| va009039 | 0:1ed23ab1345f | 780 | if ((type & 0x7f) == 1 && length == 2){ |
| va009039 | 0:1ed23ab1345f | 781 | channel->remote_mtu = READ_BT_16(command, pos); |
| va009039 | 0:1ed23ab1345f | 782 | // log_info("l2cap cid %u, remote mtu %u\n", channel->local_cid, channel->remote_mtu); |
| va009039 | 0:1ed23ab1345f | 783 | } |
| va009039 | 0:1ed23ab1345f | 784 | pos += length; |
| va009039 | 0:1ed23ab1345f | 785 | } |
| va009039 | 0:1ed23ab1345f | 786 | } |
| va009039 | 0:1ed23ab1345f | 787 | |
| va009039 | 0:1ed23ab1345f | 788 | static int l2cap_channel_ready_for_open(l2cap_channel_t *channel){ |
| va009039 | 0:1ed23ab1345f | 789 | // log_info("l2cap_channel_ready_for_open 0x%02x\n", channel->state_var); |
| va009039 | 0:1ed23ab1345f | 790 | if ((channel->state_var & L2CAP_CHANNEL_STATE_VAR_RCVD_CONF_RSP) == 0) return 0; |
| va009039 | 0:1ed23ab1345f | 791 | if ((channel->state_var & L2CAP_CHANNEL_STATE_VAR_SENT_CONF_RSP) == 0) return 0; |
| va009039 | 0:1ed23ab1345f | 792 | return 1; |
| va009039 | 0:1ed23ab1345f | 793 | } |
| va009039 | 0:1ed23ab1345f | 794 | |
| va009039 | 0:1ed23ab1345f | 795 | |
| va009039 | 0:1ed23ab1345f | 796 | void l2cap_signaling_handler_channel(l2cap_channel_t *channel, uint8_t *command){ |
| va009039 | 0:1ed23ab1345f | 797 | |
| va009039 | 0:1ed23ab1345f | 798 | uint8_t code = command[L2CAP_SIGNALING_COMMAND_CODE_OFFSET]; |
| va009039 | 0:1ed23ab1345f | 799 | uint8_t identifier = command[L2CAP_SIGNALING_COMMAND_SIGID_OFFSET]; |
| va009039 | 0:1ed23ab1345f | 800 | uint16_t result = 0; |
| va009039 | 0:1ed23ab1345f | 801 | |
| va009039 | 0:1ed23ab1345f | 802 | log_info("L2CAP signaling handler code %u, state %u\n", code, channel->state); |
| va009039 | 0:1ed23ab1345f | 803 | |
| va009039 | 0:1ed23ab1345f | 804 | // handle DISCONNECT REQUESTS seperately |
| va009039 | 0:1ed23ab1345f | 805 | if (code == DISCONNECTION_REQUEST){ |
| va009039 | 0:1ed23ab1345f | 806 | switch (channel->state){ |
| va009039 | 0:1ed23ab1345f | 807 | case L2CAP_STATE_CONFIG: |
| va009039 | 0:1ed23ab1345f | 808 | case L2CAP_STATE_OPEN: |
| va009039 | 0:1ed23ab1345f | 809 | case L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST: |
| va009039 | 0:1ed23ab1345f | 810 | case L2CAP_STATE_WAIT_DISCONNECT: |
| va009039 | 0:1ed23ab1345f | 811 | l2cap_handle_disconnect_request(channel, identifier); |
| va009039 | 0:1ed23ab1345f | 812 | break; |
| va009039 | 0:1ed23ab1345f | 813 | |
| va009039 | 0:1ed23ab1345f | 814 | default: |
| va009039 | 0:1ed23ab1345f | 815 | // ignore in other states |
| va009039 | 0:1ed23ab1345f | 816 | break; |
| va009039 | 0:1ed23ab1345f | 817 | } |
| va009039 | 0:1ed23ab1345f | 818 | return; |
| va009039 | 0:1ed23ab1345f | 819 | } |
| va009039 | 0:1ed23ab1345f | 820 | |
| va009039 | 0:1ed23ab1345f | 821 | // @STATEMACHINE(l2cap) |
| va009039 | 0:1ed23ab1345f | 822 | switch (channel->state) { |
| va009039 | 0:1ed23ab1345f | 823 | |
| va009039 | 0:1ed23ab1345f | 824 | case L2CAP_STATE_WAIT_CONNECT_RSP: |
| va009039 | 0:1ed23ab1345f | 825 | switch (code){ |
| va009039 | 0:1ed23ab1345f | 826 | case CONNECTION_RESPONSE: |
| va009039 | 0:1ed23ab1345f | 827 | result = READ_BT_16 (command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+4); |
| va009039 | 0:1ed23ab1345f | 828 | switch (result) { |
| va009039 | 0:1ed23ab1345f | 829 | case 0: |
| va009039 | 0:1ed23ab1345f | 830 | // successful connection |
| va009039 | 0:1ed23ab1345f | 831 | channel->remote_cid = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET); |
| va009039 | 0:1ed23ab1345f | 832 | channel->state = L2CAP_STATE_CONFIG; |
| va009039 | 0:1ed23ab1345f | 833 | channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ); |
| va009039 | 0:1ed23ab1345f | 834 | break; |
| va009039 | 0:1ed23ab1345f | 835 | case 1: |
| va009039 | 0:1ed23ab1345f | 836 | // connection pending. get some coffee |
| va009039 | 0:1ed23ab1345f | 837 | break; |
| va009039 | 0:1ed23ab1345f | 838 | default: |
| va009039 | 0:1ed23ab1345f | 839 | // channel closed |
| va009039 | 0:1ed23ab1345f | 840 | channel->state = L2CAP_STATE_CLOSED; |
| va009039 | 0:1ed23ab1345f | 841 | |
| va009039 | 0:1ed23ab1345f | 842 | // map l2cap connection response result to BTstack status enumeration |
| va009039 | 0:1ed23ab1345f | 843 | l2cap_emit_channel_opened(channel, L2CAP_CONNECTION_RESPONSE_RESULT_SUCCESSFUL + result); |
| va009039 | 0:1ed23ab1345f | 844 | |
| va009039 | 0:1ed23ab1345f | 845 | // drop link key if security block |
| va009039 | 0:1ed23ab1345f | 846 | if (L2CAP_CONNECTION_RESPONSE_RESULT_SUCCESSFUL + result == L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_SECURITY){ |
| va009039 | 0:1ed23ab1345f | 847 | hci_drop_link_key_for_bd_addr(&channel->address); |
| va009039 | 0:1ed23ab1345f | 848 | } |
| va009039 | 0:1ed23ab1345f | 849 | |
| va009039 | 0:1ed23ab1345f | 850 | // discard channel |
| va009039 | 0:1ed23ab1345f | 851 | linked_list_remove(&l2cap_channels, (linked_item_t *) channel); |
| va009039 | 0:1ed23ab1345f | 852 | btstack_memory_l2cap_channel_free(channel); |
| va009039 | 0:1ed23ab1345f | 853 | break; |
| va009039 | 0:1ed23ab1345f | 854 | } |
| va009039 | 0:1ed23ab1345f | 855 | break; |
| va009039 | 0:1ed23ab1345f | 856 | |
| va009039 | 0:1ed23ab1345f | 857 | default: |
| va009039 | 0:1ed23ab1345f | 858 | //@TODO: implement other signaling packets |
| va009039 | 0:1ed23ab1345f | 859 | break; |
| va009039 | 0:1ed23ab1345f | 860 | } |
| va009039 | 0:1ed23ab1345f | 861 | break; |
| va009039 | 0:1ed23ab1345f | 862 | |
| va009039 | 0:1ed23ab1345f | 863 | case L2CAP_STATE_CONFIG: |
| va009039 | 0:1ed23ab1345f | 864 | switch (code) { |
| va009039 | 0:1ed23ab1345f | 865 | case CONFIGURE_REQUEST: |
| va009039 | 0:1ed23ab1345f | 866 | channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_RCVD_CONF_REQ); |
| va009039 | 0:1ed23ab1345f | 867 | channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP); |
| va009039 | 0:1ed23ab1345f | 868 | l2cap_signaling_handle_configure_request(channel, command); |
| va009039 | 0:1ed23ab1345f | 869 | break; |
| va009039 | 0:1ed23ab1345f | 870 | case CONFIGURE_RESPONSE: |
| va009039 | 0:1ed23ab1345f | 871 | channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_RCVD_CONF_RSP); |
| va009039 | 0:1ed23ab1345f | 872 | break; |
| va009039 | 0:1ed23ab1345f | 873 | default: |
| va009039 | 0:1ed23ab1345f | 874 | break; |
| va009039 | 0:1ed23ab1345f | 875 | } |
| va009039 | 0:1ed23ab1345f | 876 | if (l2cap_channel_ready_for_open(channel)){ |
| va009039 | 0:1ed23ab1345f | 877 | // for open: |
| va009039 | 0:1ed23ab1345f | 878 | channel->state = L2CAP_STATE_OPEN; |
| va009039 | 0:1ed23ab1345f | 879 | l2cap_emit_channel_opened(channel, 0); |
| va009039 | 0:1ed23ab1345f | 880 | l2cap_emit_credits(channel, 1); |
| va009039 | 0:1ed23ab1345f | 881 | } |
| va009039 | 0:1ed23ab1345f | 882 | break; |
| va009039 | 0:1ed23ab1345f | 883 | |
| va009039 | 0:1ed23ab1345f | 884 | case L2CAP_STATE_WAIT_DISCONNECT: |
| va009039 | 0:1ed23ab1345f | 885 | switch (code) { |
| va009039 | 0:1ed23ab1345f | 886 | case DISCONNECTION_RESPONSE: |
| va009039 | 0:1ed23ab1345f | 887 | l2cap_finialize_channel_close(channel); |
| va009039 | 0:1ed23ab1345f | 888 | break; |
| va009039 | 0:1ed23ab1345f | 889 | default: |
| va009039 | 0:1ed23ab1345f | 890 | //@TODO: implement other signaling packets |
| va009039 | 0:1ed23ab1345f | 891 | break; |
| va009039 | 0:1ed23ab1345f | 892 | } |
| va009039 | 0:1ed23ab1345f | 893 | break; |
| va009039 | 0:1ed23ab1345f | 894 | |
| va009039 | 0:1ed23ab1345f | 895 | case L2CAP_STATE_CLOSED: |
| va009039 | 0:1ed23ab1345f | 896 | // @TODO handle incoming requests |
| va009039 | 0:1ed23ab1345f | 897 | break; |
| va009039 | 0:1ed23ab1345f | 898 | |
| va009039 | 0:1ed23ab1345f | 899 | case L2CAP_STATE_OPEN: |
| va009039 | 0:1ed23ab1345f | 900 | //@TODO: implement other signaling packets, e.g. re-configure |
| va009039 | 0:1ed23ab1345f | 901 | break; |
| va009039 | 0:1ed23ab1345f | 902 | default: |
| va009039 | 0:1ed23ab1345f | 903 | break; |
| va009039 | 0:1ed23ab1345f | 904 | } |
| va009039 | 0:1ed23ab1345f | 905 | // log_info("new state %u\n", channel->state); |
| va009039 | 0:1ed23ab1345f | 906 | } |
| va009039 | 0:1ed23ab1345f | 907 | |
| va009039 | 0:1ed23ab1345f | 908 | |
| va009039 | 0:1ed23ab1345f | 909 | void l2cap_signaling_handler_dispatch( hci_con_handle_t handle, uint8_t * command){ |
| va009039 | 0:1ed23ab1345f | 910 | |
| va009039 | 0:1ed23ab1345f | 911 | // get code, signalind identifier and command len |
| va009039 | 0:1ed23ab1345f | 912 | uint8_t code = command[L2CAP_SIGNALING_COMMAND_CODE_OFFSET]; |
| va009039 | 0:1ed23ab1345f | 913 | uint8_t sig_id = command[L2CAP_SIGNALING_COMMAND_SIGID_OFFSET]; |
| va009039 | 0:1ed23ab1345f | 914 | |
| va009039 | 0:1ed23ab1345f | 915 | // not for a particular channel, and not CONNECTION_REQUEST, ECHO_[REQUEST|RESPONSE], INFORMATION_REQUEST |
| va009039 | 0:1ed23ab1345f | 916 | if (code < 1 || code == ECHO_RESPONSE || code > INFORMATION_REQUEST){ |
| va009039 | 0:1ed23ab1345f | 917 | return; |
| va009039 | 0:1ed23ab1345f | 918 | } |
| va009039 | 0:1ed23ab1345f | 919 | |
| va009039 | 0:1ed23ab1345f | 920 | // general commands without an assigned channel |
| va009039 | 0:1ed23ab1345f | 921 | switch(code) { |
| va009039 | 0:1ed23ab1345f | 922 | |
| va009039 | 0:1ed23ab1345f | 923 | case CONNECTION_REQUEST: { |
| va009039 | 0:1ed23ab1345f | 924 | uint16_t psm = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET); |
| va009039 | 0:1ed23ab1345f | 925 | uint16_t source_cid = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+2); |
| va009039 | 0:1ed23ab1345f | 926 | l2cap_handle_connection_request(handle, sig_id, psm, source_cid); |
| va009039 | 0:1ed23ab1345f | 927 | return; |
| va009039 | 0:1ed23ab1345f | 928 | } |
| va009039 | 0:1ed23ab1345f | 929 | |
| va009039 | 0:1ed23ab1345f | 930 | case ECHO_REQUEST: |
| va009039 | 0:1ed23ab1345f | 931 | l2cap_register_signaling_response(handle, code, sig_id, 0); |
| va009039 | 0:1ed23ab1345f | 932 | return; |
| va009039 | 0:1ed23ab1345f | 933 | |
| va009039 | 0:1ed23ab1345f | 934 | case INFORMATION_REQUEST: { |
| va009039 | 0:1ed23ab1345f | 935 | uint16_t infoType = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET); |
| va009039 | 0:1ed23ab1345f | 936 | l2cap_register_signaling_response(handle, code, sig_id, infoType); |
| va009039 | 0:1ed23ab1345f | 937 | return; |
| va009039 | 0:1ed23ab1345f | 938 | } |
| va009039 | 0:1ed23ab1345f | 939 | |
| va009039 | 0:1ed23ab1345f | 940 | default: |
| va009039 | 0:1ed23ab1345f | 941 | break; |
| va009039 | 0:1ed23ab1345f | 942 | } |
| va009039 | 0:1ed23ab1345f | 943 | |
| va009039 | 0:1ed23ab1345f | 944 | |
| va009039 | 0:1ed23ab1345f | 945 | // Get potential destination CID |
| va009039 | 0:1ed23ab1345f | 946 | uint16_t dest_cid = READ_BT_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET); |
| va009039 | 0:1ed23ab1345f | 947 | |
| va009039 | 0:1ed23ab1345f | 948 | // Find channel for this sig_id and connection handle |
| va009039 | 0:1ed23ab1345f | 949 | linked_item_t *it; |
| va009039 | 0:1ed23ab1345f | 950 | for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){ |
| va009039 | 0:1ed23ab1345f | 951 | l2cap_channel_t * channel = (l2cap_channel_t *) it; |
| va009039 | 0:1ed23ab1345f | 952 | if (channel->handle == handle) { |
| va009039 | 0:1ed23ab1345f | 953 | if (code & 1) { |
| va009039 | 0:1ed23ab1345f | 954 | // match odd commands (responses) by previous signaling identifier |
| va009039 | 0:1ed23ab1345f | 955 | if (channel->local_sig_id == sig_id) { |
| va009039 | 0:1ed23ab1345f | 956 | l2cap_signaling_handler_channel(channel, command); |
| va009039 | 0:1ed23ab1345f | 957 | break; |
| va009039 | 0:1ed23ab1345f | 958 | } |
| va009039 | 0:1ed23ab1345f | 959 | } else { |
| va009039 | 0:1ed23ab1345f | 960 | // match even commands (requests) by local channel id |
| va009039 | 0:1ed23ab1345f | 961 | if (channel->local_cid == dest_cid) { |
| va009039 | 0:1ed23ab1345f | 962 | l2cap_signaling_handler_channel(channel, command); |
| va009039 | 0:1ed23ab1345f | 963 | break; |
| va009039 | 0:1ed23ab1345f | 964 | } |
| va009039 | 0:1ed23ab1345f | 965 | } |
| va009039 | 0:1ed23ab1345f | 966 | } |
| va009039 | 0:1ed23ab1345f | 967 | } |
| va009039 | 0:1ed23ab1345f | 968 | } |
| va009039 | 0:1ed23ab1345f | 969 | |
| va009039 | 0:1ed23ab1345f | 970 | void l2cap_acl_handler( uint8_t *packet, uint16_t size ){ |
| va009039 | 0:1ed23ab1345f | 971 | |
| va009039 | 0:1ed23ab1345f | 972 | // Get Channel ID |
| va009039 | 0:1ed23ab1345f | 973 | uint16_t channel_id = READ_L2CAP_CHANNEL_ID(packet); |
| va009039 | 0:1ed23ab1345f | 974 | hci_con_handle_t handle = READ_ACL_CONNECTION_HANDLE(packet); |
| va009039 | 0:1ed23ab1345f | 975 | |
| va009039 | 0:1ed23ab1345f | 976 | switch (channel_id) { |
| va009039 | 0:1ed23ab1345f | 977 | |
| va009039 | 0:1ed23ab1345f | 978 | case L2CAP_CID_SIGNALING: { |
| va009039 | 0:1ed23ab1345f | 979 | |
| va009039 | 0:1ed23ab1345f | 980 | uint16_t command_offset = 8; |
| va009039 | 0:1ed23ab1345f | 981 | while (command_offset < size) { |
| va009039 | 0:1ed23ab1345f | 982 | |
| va009039 | 0:1ed23ab1345f | 983 | // handle signaling commands |
| va009039 | 0:1ed23ab1345f | 984 | l2cap_signaling_handler_dispatch(handle, &packet[command_offset]); |
| va009039 | 0:1ed23ab1345f | 985 | |
| va009039 | 0:1ed23ab1345f | 986 | // increment command_offset |
| va009039 | 0:1ed23ab1345f | 987 | command_offset += L2CAP_SIGNALING_COMMAND_DATA_OFFSET + READ_BT_16(packet, command_offset + L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET); |
| va009039 | 0:1ed23ab1345f | 988 | } |
| va009039 | 0:1ed23ab1345f | 989 | break; |
| va009039 | 0:1ed23ab1345f | 990 | } |
| va009039 | 0:1ed23ab1345f | 991 | |
| va009039 | 0:1ed23ab1345f | 992 | case L2CAP_CID_ATTRIBUTE_PROTOCOL: |
| va009039 | 0:1ed23ab1345f | 993 | if (attribute_protocol_packet_handler) { |
| va009039 | 0:1ed23ab1345f | 994 | (*attribute_protocol_packet_handler)(ATT_DATA_PACKET, handle, &packet[COMPLETE_L2CAP_HEADER], size-COMPLETE_L2CAP_HEADER); |
| va009039 | 0:1ed23ab1345f | 995 | } |
| va009039 | 0:1ed23ab1345f | 996 | break; |
| va009039 | 0:1ed23ab1345f | 997 | |
| va009039 | 0:1ed23ab1345f | 998 | case L2CAP_CID_SECURITY_MANAGER_PROTOCOL: |
| va009039 | 0:1ed23ab1345f | 999 | if (security_protocol_packet_handler) { |
| va009039 | 0:1ed23ab1345f | 1000 | (*security_protocol_packet_handler)(SM_DATA_PACKET, handle, &packet[COMPLETE_L2CAP_HEADER], size-COMPLETE_L2CAP_HEADER); |
| va009039 | 0:1ed23ab1345f | 1001 | } |
| va009039 | 0:1ed23ab1345f | 1002 | break; |
| va009039 | 0:1ed23ab1345f | 1003 | |
| va009039 | 0:1ed23ab1345f | 1004 | default: { |
| va009039 | 0:1ed23ab1345f | 1005 | // Find channel for this channel_id and connection handle |
| va009039 | 0:1ed23ab1345f | 1006 | l2cap_channel_t * channel = l2cap_get_channel_for_local_cid(channel_id); |
| va009039 | 0:1ed23ab1345f | 1007 | if (channel) { |
| va009039 | 0:1ed23ab1345f | 1008 | l2cap_dispatch(channel, L2CAP_DATA_PACKET, &packet[COMPLETE_L2CAP_HEADER], size-COMPLETE_L2CAP_HEADER); |
| va009039 | 0:1ed23ab1345f | 1009 | } |
| va009039 | 0:1ed23ab1345f | 1010 | break; |
| va009039 | 0:1ed23ab1345f | 1011 | } |
| va009039 | 0:1ed23ab1345f | 1012 | } |
| va009039 | 0:1ed23ab1345f | 1013 | |
| va009039 | 0:1ed23ab1345f | 1014 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 1015 | } |
| va009039 | 0:1ed23ab1345f | 1016 | |
| va009039 | 0:1ed23ab1345f | 1017 | static void l2cap_packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ |
| va009039 | 0:1ed23ab1345f | 1018 | switch (packet_type) { |
| va009039 | 0:1ed23ab1345f | 1019 | case HCI_EVENT_PACKET: |
| va009039 | 0:1ed23ab1345f | 1020 | l2cap_event_handler(packet, size); |
| va009039 | 0:1ed23ab1345f | 1021 | break; |
| va009039 | 0:1ed23ab1345f | 1022 | case HCI_ACL_DATA_PACKET: |
| va009039 | 0:1ed23ab1345f | 1023 | l2cap_acl_handler(packet, size); |
| va009039 | 0:1ed23ab1345f | 1024 | break; |
| va009039 | 0:1ed23ab1345f | 1025 | default: |
| va009039 | 0:1ed23ab1345f | 1026 | break; |
| va009039 | 0:1ed23ab1345f | 1027 | } |
| va009039 | 0:1ed23ab1345f | 1028 | } |
| va009039 | 0:1ed23ab1345f | 1029 | |
| va009039 | 0:1ed23ab1345f | 1030 | // finalize closed channel - l2cap_handle_disconnect_request & DISCONNECTION_RESPONSE |
| va009039 | 0:1ed23ab1345f | 1031 | void l2cap_finialize_channel_close(l2cap_channel_t *channel){ |
| va009039 | 0:1ed23ab1345f | 1032 | channel->state = L2CAP_STATE_CLOSED; |
| va009039 | 0:1ed23ab1345f | 1033 | l2cap_emit_channel_closed(channel); |
| va009039 | 0:1ed23ab1345f | 1034 | // discard channel |
| va009039 | 0:1ed23ab1345f | 1035 | linked_list_remove(&l2cap_channels, (linked_item_t *) channel); |
| va009039 | 0:1ed23ab1345f | 1036 | btstack_memory_l2cap_channel_free(channel); |
| va009039 | 0:1ed23ab1345f | 1037 | } |
| va009039 | 0:1ed23ab1345f | 1038 | |
| va009039 | 0:1ed23ab1345f | 1039 | l2cap_service_t * l2cap_get_service(uint16_t psm){ |
| va009039 | 0:1ed23ab1345f | 1040 | linked_item_t *it; |
| va009039 | 0:1ed23ab1345f | 1041 | |
| va009039 | 0:1ed23ab1345f | 1042 | // close open channels |
| va009039 | 0:1ed23ab1345f | 1043 | for (it = (linked_item_t *) l2cap_services; it ; it = it->next){ |
| va009039 | 0:1ed23ab1345f | 1044 | l2cap_service_t * service = ((l2cap_service_t *) it); |
| va009039 | 0:1ed23ab1345f | 1045 | if ( service->psm == psm){ |
| va009039 | 0:1ed23ab1345f | 1046 | return service; |
| va009039 | 0:1ed23ab1345f | 1047 | }; |
| va009039 | 0:1ed23ab1345f | 1048 | } |
| va009039 | 0:1ed23ab1345f | 1049 | return NULL; |
| va009039 | 0:1ed23ab1345f | 1050 | } |
| va009039 | 0:1ed23ab1345f | 1051 | |
| va009039 | 0:1ed23ab1345f | 1052 | void l2cap_register_service_internal(void *connection, btstack_packet_handler_t packet_handler, uint16_t psm, uint16_t mtu){ |
| va009039 | 0:1ed23ab1345f | 1053 | // check for alread registered psm |
| va009039 | 0:1ed23ab1345f | 1054 | // TODO: emit error event |
| va009039 | 0:1ed23ab1345f | 1055 | l2cap_service_t *service = l2cap_get_service(psm); |
| va009039 | 0:1ed23ab1345f | 1056 | if (service) { |
| va009039 | 0:1ed23ab1345f | 1057 | log_error("l2cap_register_service_internal: PSM %u already registered\n", psm); |
| va009039 | 0:1ed23ab1345f | 1058 | l2cap_emit_service_registered(connection, L2CAP_SERVICE_ALREADY_REGISTERED, psm); |
| va009039 | 0:1ed23ab1345f | 1059 | return; |
| va009039 | 0:1ed23ab1345f | 1060 | } |
| va009039 | 0:1ed23ab1345f | 1061 | |
| va009039 | 0:1ed23ab1345f | 1062 | // alloc structure |
| va009039 | 0:1ed23ab1345f | 1063 | // TODO: emit error event |
| va009039 | 0:1ed23ab1345f | 1064 | service = (l2cap_service_t *) btstack_memory_l2cap_service_get(); |
| va009039 | 0:1ed23ab1345f | 1065 | if (!service) { |
| va009039 | 0:1ed23ab1345f | 1066 | log_error("l2cap_register_service_internal: no memory for l2cap_service_t\n"); |
| va009039 | 0:1ed23ab1345f | 1067 | l2cap_emit_service_registered(connection, BTSTACK_MEMORY_ALLOC_FAILED, psm); |
| va009039 | 0:1ed23ab1345f | 1068 | return; |
| va009039 | 0:1ed23ab1345f | 1069 | } |
| va009039 | 0:1ed23ab1345f | 1070 | |
| va009039 | 0:1ed23ab1345f | 1071 | // fill in |
| va009039 | 0:1ed23ab1345f | 1072 | service->psm = psm; |
| va009039 | 0:1ed23ab1345f | 1073 | service->mtu = mtu; |
| va009039 | 0:1ed23ab1345f | 1074 | service->connection = connection; |
| va009039 | 0:1ed23ab1345f | 1075 | service->packet_handler = packet_handler; |
| va009039 | 0:1ed23ab1345f | 1076 | |
| va009039 | 0:1ed23ab1345f | 1077 | // add to services list |
| va009039 | 0:1ed23ab1345f | 1078 | linked_list_add(&l2cap_services, (linked_item_t *) service); |
| va009039 | 0:1ed23ab1345f | 1079 | |
| va009039 | 0:1ed23ab1345f | 1080 | // enable page scan |
| va009039 | 0:1ed23ab1345f | 1081 | hci_connectable_control(1); |
| va009039 | 0:1ed23ab1345f | 1082 | |
| va009039 | 0:1ed23ab1345f | 1083 | // done |
| va009039 | 0:1ed23ab1345f | 1084 | l2cap_emit_service_registered(connection, 0, psm); |
| va009039 | 0:1ed23ab1345f | 1085 | } |
| va009039 | 0:1ed23ab1345f | 1086 | |
| va009039 | 0:1ed23ab1345f | 1087 | void l2cap_unregister_service_internal(void *connection, uint16_t psm){ |
| va009039 | 0:1ed23ab1345f | 1088 | l2cap_service_t *service = l2cap_get_service(psm); |
| va009039 | 0:1ed23ab1345f | 1089 | if (!service) return; |
| va009039 | 0:1ed23ab1345f | 1090 | linked_list_remove(&l2cap_services, (linked_item_t *) service); |
| va009039 | 0:1ed23ab1345f | 1091 | btstack_memory_l2cap_service_free(service); |
| va009039 | 0:1ed23ab1345f | 1092 | |
| va009039 | 0:1ed23ab1345f | 1093 | // disable page scan when no services registered |
| va009039 | 0:1ed23ab1345f | 1094 | if (!linked_list_empty(&l2cap_services)) return; |
| va009039 | 0:1ed23ab1345f | 1095 | hci_connectable_control(0); |
| va009039 | 0:1ed23ab1345f | 1096 | } |
| va009039 | 0:1ed23ab1345f | 1097 | |
| va009039 | 0:1ed23ab1345f | 1098 | // |
| va009039 | 0:1ed23ab1345f | 1099 | void l2cap_close_connection(void *connection){ |
| va009039 | 0:1ed23ab1345f | 1100 | linked_item_t *it; |
| va009039 | 0:1ed23ab1345f | 1101 | |
| va009039 | 0:1ed23ab1345f | 1102 | // close open channels - note to myself: no channel is freed, so no new for fancy iterator tricks |
| va009039 | 0:1ed23ab1345f | 1103 | l2cap_channel_t * channel; |
| va009039 | 0:1ed23ab1345f | 1104 | for (it = (linked_item_t *) l2cap_channels; it ; it = it->next){ |
| va009039 | 0:1ed23ab1345f | 1105 | channel = (l2cap_channel_t *) it; |
| va009039 | 0:1ed23ab1345f | 1106 | if (channel->connection == connection) { |
| va009039 | 0:1ed23ab1345f | 1107 | channel->state = L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST; |
| va009039 | 0:1ed23ab1345f | 1108 | } |
| va009039 | 0:1ed23ab1345f | 1109 | } |
| va009039 | 0:1ed23ab1345f | 1110 | |
| va009039 | 0:1ed23ab1345f | 1111 | // unregister services |
| va009039 | 0:1ed23ab1345f | 1112 | it = (linked_item_t *) &l2cap_services; |
| va009039 | 0:1ed23ab1345f | 1113 | while (it->next) { |
| va009039 | 0:1ed23ab1345f | 1114 | l2cap_service_t * service = (l2cap_service_t *) it->next; |
| va009039 | 0:1ed23ab1345f | 1115 | if (service->connection == connection){ |
| va009039 | 0:1ed23ab1345f | 1116 | it->next = it->next->next; |
| va009039 | 0:1ed23ab1345f | 1117 | btstack_memory_l2cap_service_free(service); |
| va009039 | 0:1ed23ab1345f | 1118 | } else { |
| va009039 | 0:1ed23ab1345f | 1119 | it = it->next; |
| va009039 | 0:1ed23ab1345f | 1120 | } |
| va009039 | 0:1ed23ab1345f | 1121 | } |
| va009039 | 0:1ed23ab1345f | 1122 | |
| va009039 | 0:1ed23ab1345f | 1123 | // process |
| va009039 | 0:1ed23ab1345f | 1124 | l2cap_run(); |
| va009039 | 0:1ed23ab1345f | 1125 | } |
| va009039 | 0:1ed23ab1345f | 1126 | |
| va009039 | 0:1ed23ab1345f | 1127 | // Bluetooth 4.0 - allows to register handler for Attribute Protocol and Security Manager Protocol |
| va009039 | 0:1ed23ab1345f | 1128 | void l2cap_register_fixed_channel(btstack_packet_handler_t packet_handler, uint16_t channel_id) { |
| va009039 | 0:1ed23ab1345f | 1129 | switch(channel_id){ |
| va009039 | 0:1ed23ab1345f | 1130 | case L2CAP_CID_ATTRIBUTE_PROTOCOL: |
| va009039 | 0:1ed23ab1345f | 1131 | attribute_protocol_packet_handler = packet_handler; |
| va009039 | 0:1ed23ab1345f | 1132 | break; |
| va009039 | 0:1ed23ab1345f | 1133 | case L2CAP_CID_SECURITY_MANAGER_PROTOCOL: |
| va009039 | 0:1ed23ab1345f | 1134 | security_protocol_packet_handler = packet_handler; |
| va009039 | 0:1ed23ab1345f | 1135 | break; |
| va009039 | 0:1ed23ab1345f | 1136 | } |
| va009039 | 0:1ed23ab1345f | 1137 | } |
| va009039 | 0:1ed23ab1345f | 1138 |