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