1 /** @file 2 * @brief Internal APIs for Bluetooth L2CAP BR/EDR handling. 3 */ 4 5 /* 6 * Copyright (c) 2015-2016 Intel Corporation 7 * 8 * SPDX-License-Identifier: Apache-2.0 9 */ 10 11 #include <zephyr/bluetooth/l2cap.h> 12 #include <zephyr/sys/iterable_sections.h> 13 #include "l2cap_br_interface.h" 14 15 #define BT_L2CAP_CID_BR_SIG 0x0001 16 #define BT_L2CAP_CID_BR_SMP 0x0007 17 #define BT_L2CAP_PSM_RFCOMM 0x0003 18 19 struct bt_l2cap_hdr { 20 uint16_t len; 21 uint16_t cid; 22 } __packed; 23 24 struct bt_l2cap_sig_hdr { 25 uint8_t code; 26 uint8_t ident; 27 uint16_t len; 28 } __packed; 29 30 #define BT_L2CAP_REJ_NOT_UNDERSTOOD 0x0000 31 #define BT_L2CAP_REJ_MTU_EXCEEDED 0x0001 32 #define BT_L2CAP_REJ_INVALID_CID 0x0002 33 34 #define BT_L2CAP_CMD_REJECT 0x01 35 struct bt_l2cap_cmd_reject { 36 uint16_t reason; 37 uint8_t data[0]; 38 } __packed; 39 40 struct bt_l2cap_cmd_reject_cid_data { 41 uint16_t scid; 42 uint16_t dcid; 43 } __packed; 44 45 #define BT_L2CAP_CONN_REQ 0x02 46 struct bt_l2cap_conn_req { 47 uint16_t psm; 48 uint16_t scid; 49 } __packed; 50 51 /* command statuses in response */ 52 #define BT_L2CAP_CS_NO_INFO 0x0000 53 #define BT_L2CAP_CS_AUTHEN_PEND 0x0001 54 55 /* valid results in conn response on BR/EDR */ 56 #define BT_L2CAP_BR_SUCCESS 0x0000 57 #define BT_L2CAP_BR_PENDING 0x0001 58 #define BT_L2CAP_BR_ERR_PSM_NOT_SUPP 0x0002 59 #define BT_L2CAP_BR_ERR_SEC_BLOCK 0x0003 60 #define BT_L2CAP_BR_ERR_NO_RESOURCES 0x0004 61 #define BT_L2CAP_BR_ERR_INVALID_SCID 0x0006 62 #define BT_L2CAP_BR_ERR_SCID_IN_USE 0x0007 63 64 #define BT_L2CAP_CONN_RSP 0x03 65 struct bt_l2cap_conn_rsp { 66 uint16_t dcid; 67 uint16_t scid; 68 uint16_t result; 69 uint16_t status; 70 } __packed; 71 72 #define BT_L2CAP_CONF_SUCCESS 0x0000 73 #define BT_L2CAP_CONF_UNACCEPT 0x0001 74 #define BT_L2CAP_CONF_REJECT 0x0002 75 #define BT_L2CAP_CONF_UNKNOWN_OPT 0x0003 76 #define BT_L2CAP_CONF_PENDING 0x0004 77 #define BT_L2CAP_CONF_FLOW_SPEC_REJECT 0x0005 78 79 #define BT_L2CAP_CONF_FLAGS_C BIT(0) 80 #define BT_L2CAP_CONF_FLAGS_MASK BT_L2CAP_CONF_FLAGS_C 81 82 #define BT_L2CAP_CONF_REQ 0x04 83 struct bt_l2cap_conf_req { 84 uint16_t dcid; 85 uint16_t flags; 86 uint8_t data[0]; 87 } __packed; 88 89 #define BT_L2CAP_CONF_RSP 0x05 90 struct bt_l2cap_conf_rsp { 91 uint16_t scid; 92 uint16_t flags; 93 uint16_t result; 94 uint8_t data[0]; 95 } __packed; 96 97 /* Option type used by MTU config request data */ 98 #define BT_L2CAP_CONF_OPT_MTU 0x01 99 #define BT_L2CAP_CONF_OPT_FLUSH_TIMEOUT 0x02 100 #define BT_L2CAP_CONF_OPT_QOS 0x03 101 #define BT_L2CAP_CONF_OPT_RET_FC 0x04 102 #define BT_L2CAP_CONF_OPT_FCS 0x05 103 #define BT_L2CAP_CONF_OPT_EXT_FLOW_SPEC 0x06 104 #define BT_L2CAP_CONF_OPT_EXT_WIN_SIZE 0x07 105 106 /* Options bits selecting most significant bit (hint) in type field */ 107 #define BT_L2CAP_CONF_HINT 0x80 108 #define BT_L2CAP_CONF_MASK 0x7f 109 110 struct bt_l2cap_conf_opt { 111 uint8_t type; 112 uint8_t len; 113 uint8_t data[0]; 114 } __packed; 115 116 struct bt_l2cap_conf_opt_mtu { 117 uint16_t mtu; 118 } __packed; 119 120 struct bt_l2cap_conf_opt_flush_timeout { 121 uint16_t timeout; 122 } __packed; 123 124 #define BT_L2CAP_QOS_TYPE_NO_TRAFFIC 0x00 125 #define BT_L2CAP_QOS_TYPE_BEST_EFFORT 0x01 126 #define BT_L2CAP_QOS_TYPE_GUARANTEED 0x02 127 struct bt_l2cap_conf_opt_qos { 128 uint8_t flags; 129 uint8_t service_type; 130 uint32_t token_rate; 131 uint32_t token_bucket_size; 132 uint32_t peak_bandwidth; 133 uint32_t latency; 134 uint32_t delay_variation; 135 } __packed; 136 137 #define BT_L2CAP_RET_FC_MODE_BASIC 0x00 138 #define BT_L2CAP_RET_FC_MODE_RET 0x01 139 #define BT_L2CAP_RET_FC_MODE_FC 0x02 140 #define BT_L2CAP_RET_FC_MODE_ENH_RET 0x03 141 #define BT_L2CAP_RET_FC_MODE_STREAM 0x04 142 struct bt_l2cap_conf_opt_ret_fc { 143 uint8_t mode; 144 uint8_t tx_windows_size; 145 uint8_t max_transmit; 146 uint16_t retransmission_timeout; 147 uint16_t monitor_timeout; 148 uint16_t mps; 149 } __packed; 150 151 #define BT_L2CAP_FCS_TYPE_NO 0x00 152 #define BT_L2CAP_FCS_TYPE_16BIT 0x01 153 struct bt_l2cap_conf_opt_fcs { 154 uint8_t type; 155 } __packed; 156 157 #define BT_L2CAP_DISCONN_REQ 0x06 158 struct bt_l2cap_disconn_req { 159 uint16_t dcid; 160 uint16_t scid; 161 } __packed; 162 163 #define BT_L2CAP_DISCONN_RSP 0x07 164 struct bt_l2cap_disconn_rsp { 165 uint16_t dcid; 166 uint16_t scid; 167 } __packed; 168 169 #define BT_L2CAP_INFO_FEAT_MASK 0x0002 170 #define BT_L2CAP_INFO_FIXED_CHAN 0x0003 171 172 #define BT_L2CAP_INFO_REQ 0x0a 173 struct bt_l2cap_info_req { 174 uint16_t type; 175 } __packed; 176 177 /* info result */ 178 #define BT_L2CAP_INFO_SUCCESS 0x0000 179 #define BT_L2CAP_INFO_NOTSUPP 0x0001 180 181 #define BT_L2CAP_INFO_RSP 0x0b 182 struct bt_l2cap_info_rsp { 183 uint16_t type; 184 uint16_t result; 185 uint8_t data[0]; 186 } __packed; 187 188 #define BR_CHAN(_ch) CONTAINER_OF(_ch, struct bt_l2cap_br_chan, chan) 189 190 /* Add channel to the connection */ 191 void bt_l2cap_chan_add(struct bt_conn *conn, struct bt_l2cap_chan *chan, 192 bt_l2cap_chan_destroy_t destroy); 193 194 /* Remove channel from the connection */ 195 void bt_l2cap_chan_remove(struct bt_conn *conn, struct bt_l2cap_chan *chan); 196 197 /* Delete channel */ 198 void bt_l2cap_br_chan_del(struct bt_l2cap_chan *chan); 199 200 const char *bt_l2cap_chan_state_str(bt_l2cap_chan_state_t state); 201 202 #if defined(CONFIG_BT_L2CAP_LOG_LEVEL_DBG) 203 void bt_l2cap_br_chan_set_state_debug(struct bt_l2cap_chan *chan, 204 bt_l2cap_chan_state_t state, 205 const char *func, int line); 206 #define bt_l2cap_br_chan_set_state(_chan, _state) \ 207 bt_l2cap_br_chan_set_state_debug(_chan, _state, __func__, __LINE__) 208 #else 209 void bt_l2cap_br_chan_set_state(struct bt_l2cap_chan *chan, 210 bt_l2cap_chan_state_t state); 211 #endif /* CONFIG_BT_L2CAP_LOG_LEVEL_DBG */ 212 213 /* Prepare an L2CAP PDU to be sent over a connection */ 214 struct net_buf *bt_l2cap_create_pdu_timeout(struct net_buf_pool *pool, 215 size_t reserve, 216 k_timeout_t timeout); 217 218 #define bt_l2cap_create_pdu(_pool, _reserve) \ 219 bt_l2cap_create_pdu_timeout(_pool, _reserve, K_FOREVER) 220
