1 /* 2 * hci.h 3 * 4 * Created by Matthias Ringwald on 4/29/09. 5 * 6 */ 7 8 #pragma once 9 10 #include "hci_cmds.h" 11 #include "utils.h" 12 #include "hci_transport.h" 13 #include "bt_control.h" 14 15 #include <stdint.h> 16 #include <stdlib.h> 17 #include <stdarg.h> 18 19 /** 20 * Connection State 21 */ 22 typedef enum { 23 SEND_NEGATIVE_LINK_KEY_REQUEST = 1 << 0, 24 SEND_PIN_CODE_RESPONSE = 1 << 1 25 } hci_connection_flags_t; 26 27 typedef enum { 28 SENT_CREATE_CONNECTION = 1, 29 RECEIVED_CONNECTION_REQUEST, 30 ACCEPTED_CONNECTION_REQUEST, 31 REJECTED_CONNECTION_REQUEST, 32 OPEN, 33 SENT_DISCONNECT 34 } CONNECTION_STATE; 35 36 typedef struct { 37 // linked list - assert: first field 38 linked_item_t item; 39 40 // remote side 41 bd_addr_t address; 42 43 // module handle 44 hci_con_handle_t con_handle; 45 46 // state 47 CONNECTION_STATE state; 48 49 // errands 50 hci_connection_flags_t flags; 51 52 // timer 53 timer_t timeout; 54 struct timeval timestamp; 55 56 } hci_connection_t; 57 58 /** 59 * main data structure 60 */ 61 typedef struct { 62 // transport component with configuration 63 hci_transport_t * hci_transport; 64 void * config; 65 66 // hardware power controller 67 bt_control_t * control; 68 69 // list of existing baseband connections 70 linked_list_t connections; 71 72 // single buffer for HCI Command assembly 73 uint8_t * hci_cmd_buffer; 74 75 /* host to controller flow control */ 76 uint8_t num_cmd_packets; 77 uint8_t num_acl_packets; 78 79 /* callback to L2CAP layer */ 80 void (*event_packet_handler)(uint8_t *packet, uint16_t size); 81 void (*acl_packet_handler) (uint8_t *packet, uint16_t size); 82 83 /* hci state machine */ 84 HCI_STATE state; 85 uint8_t substate; 86 uint8_t cmds_ready; 87 88 } hci_stack_t; 89 90 // set up HCI 91 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control); 92 93 void hci_register_event_packet_handler(void (*handler)(uint8_t *packet, uint16_t size)); 94 95 void hci_register_acl_packet_handler (void (*handler)(uint8_t *packet, uint16_t size)); 96 97 // power control 98 int hci_power_control(HCI_POWER_MODE mode); 99 100 /** 101 * run the hci control loop once 102 */ 103 void hci_run(); 104 105 // create and send hci command packets based on a template and a list of parameters 106 int hci_send_cmd(hci_cmd_t *cmd, ...); 107 108 // send complete CMD packet 109 int hci_send_cmd_packet(uint8_t *packet, int size); 110 111 // send ACL packet 112 int hci_send_acl_packet(uint8_t *packet, int size); 113 114 // 115 void hci_emit_state(); 116 void hci_emit_connection_complete(hci_connection_t *conn); 117 void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 118