/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef H_L2CAP_PRIV_
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#define H_L2CAP_PRIV_
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#include "ble_l2cap_coc_priv.h"
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#include "host/ble_l2cap.h"
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#include <inttypes.h>
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#include "stats/stats.h"
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#include "os/queue.h"
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#include "os/os_mbuf.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct ble_hs_conn;
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struct hci_data_hdr;
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STATS_SECT_START(ble_l2cap_stats)
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STATS_SECT_ENTRY(chan_create)
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STATS_SECT_ENTRY(chan_delete)
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STATS_SECT_ENTRY(update_init)
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STATS_SECT_ENTRY(update_rx)
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STATS_SECT_ENTRY(update_fail)
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STATS_SECT_ENTRY(proc_timeout)
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STATS_SECT_ENTRY(sig_tx)
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STATS_SECT_ENTRY(sig_rx)
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STATS_SECT_ENTRY(sm_tx)
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STATS_SECT_ENTRY(sm_rx)
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STATS_SECT_END
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extern STATS_SECT_DECL(ble_l2cap_stats) ble_l2cap_stats;
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extern struct os_mempool ble_l2cap_chan_pool;
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/* This is nimble specific; packets sent to the black hole CID do not elicit
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* an "invalid CID" response.
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*/
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#define BLE_L2CAP_CID_BLACK_HOLE 0xffff
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#define BLE_L2CAP_HDR_SZ 4
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typedef uint8_t ble_l2cap_chan_flags;
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typedef int ble_l2cap_rx_fn(struct ble_l2cap_chan *chan);
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struct ble_l2cap_chan {
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SLIST_ENTRY(ble_l2cap_chan) next;
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uint16_t conn_handle;
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uint16_t dcid;
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uint16_t scid;
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/* Unions just to avoid confusion on MPS/MTU.
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* In CoC context, L2CAP MTU is MPS
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*/
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union {
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uint16_t my_mtu;
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uint16_t my_coc_mps;
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};
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union {
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uint16_t peer_mtu;
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uint16_t peer_coc_mps;
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};
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ble_l2cap_chan_flags flags;
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struct os_mbuf *rx_buf;
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uint16_t rx_len; /* Length of current reassembled rx packet. */
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ble_l2cap_rx_fn *rx_fn;
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#if MYNEWT_VAL(BLE_L2CAP_COC_MAX_NUM) != 0
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uint16_t psm;
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struct ble_l2cap_coc_endpoint coc_rx;
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struct ble_l2cap_coc_endpoint coc_tx;
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uint16_t initial_credits;
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ble_l2cap_event_fn *cb;
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void *cb_arg;
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#endif
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};
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struct ble_l2cap_hdr {
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uint16_t len;
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uint16_t cid;
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};
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typedef int ble_l2cap_tx_fn(struct ble_hs_conn *conn,
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struct ble_l2cap_chan *chan);
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#define BLE_L2CAP_CHAN_F_TXED_MTU 0x01 /* We have sent our MTU. */
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#define BLE_L2CAP_CHAN_F_DISCONNECTING 0x02 /* We have sent L2CAP Disconnect. */
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SLIST_HEAD(ble_l2cap_chan_list, ble_l2cap_chan);
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int ble_l2cap_parse_hdr(struct os_mbuf *om, int off,
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struct ble_l2cap_hdr *l2cap_hdr);
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struct os_mbuf *ble_l2cap_prepend_hdr(struct os_mbuf *om, uint16_t cid,
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uint16_t len);
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struct ble_l2cap_chan *ble_l2cap_chan_alloc(uint16_t conn_handle);
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void ble_l2cap_chan_free(struct ble_hs_conn *conn, struct ble_l2cap_chan *chan);
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bool ble_l2cap_is_mtu_req_sent(const struct ble_l2cap_chan *chan);
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int ble_l2cap_rx(struct ble_hs_conn *conn,
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struct hci_data_hdr *hci_hdr,
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struct os_mbuf *om,
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ble_l2cap_rx_fn **out_rx_cb,
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int *out_reject_cid);
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int ble_l2cap_tx(struct ble_hs_conn *conn, struct ble_l2cap_chan *chan,
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struct os_mbuf *txom);
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void ble_l2cap_remove_rx(struct ble_hs_conn *conn, struct ble_l2cap_chan *chan);
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int ble_l2cap_init(void);
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/* Below experimental API is available when BLE_VERSION >= 52 */
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int ble_l2cap_enhanced_connect(uint16_t conn_handle,
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uint16_t psm, uint16_t mtu,
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uint8_t num, struct os_mbuf *sdu_rx[],
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ble_l2cap_event_fn *cb, void *cb_arg);
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int ble_l2cap_reconfig(struct ble_l2cap_chan *chans[], uint8_t num, uint16_t new_mtu);
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#ifdef __cplusplus
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}
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#endif
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#endif
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