ref: 5f5c771752a80dcd64e684b1f10b45f297763d1f
src/libs/mynewt-nimble/apps/bttester/src/l2cap.c
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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. */ /* l2cap.c - Bluetooth L2CAP Tester */ /* * Copyright (c) 2016 Intel Corporation * * SPDX-License-Identifier: Apache-2.0 */ #include "syscfg/syscfg.h" #if MYNEWT_VAL(BLE_L2CAP_COC_MAX_NUM) #include "console/console.h" #include "host/ble_gap.h" #include "host/ble_l2cap.h" #include "../../../nimble/host/src/ble_l2cap_priv.h" #include "bttester.h" #define CONTROLLER_INDEX 0 #define CHANNELS MYNEWT_VAL(BLE_L2CAP_COC_MAX_NUM) #define TESTER_COC_MTU MYNEWT_VAL(BTTESTER_L2CAP_COC_MTU) #define TESTER_COC_BUF_COUNT (3 * MYNEWT_VAL(BLE_L2CAP_COC_MAX_NUM)) static os_membuf_t tester_sdu_coc_mem[ OS_MEMPOOL_SIZE(TESTER_COC_BUF_COUNT, TESTER_COC_MTU) ]; struct os_mbuf_pool sdu_os_mbuf_pool; static struct os_mempool sdu_coc_mbuf_mempool; static struct channel { uint8_t chan_id; /* Internal number that identifies L2CAP channel. */ uint8_t state; struct ble_l2cap_chan *chan; } channels[CHANNELS]; static uint8_t recv_cb_buf[TESTER_COC_MTU + sizeof(struct l2cap_data_received_ev)]; static struct channel *get_free_channel(void) { uint8_t i; struct channel *chan; for (i = 0; i < CHANNELS; i++) { if (channels[i].state) { continue; } chan = &channels[i]; chan->chan_id = i; return chan; } return NULL; } struct channel *find_channel(struct ble_l2cap_chan *chan) { int i; for (i = 0; i < CHANNELS; ++i) { if (channels[i].chan == chan) { return &channels[i]; } } return NULL; } struct channel *get_channel(uint8_t chan_id) { if (chan_id >= CHANNELS) { return NULL; } return &channels[chan_id]; } static void tester_l2cap_coc_recv(struct ble_l2cap_chan *chan, struct os_mbuf *sdu) { SYS_LOG_DBG("LE CoC SDU received, chan: 0x%08lx, data len %d", (uint32_t) chan, OS_MBUF_PKTLEN(sdu)); os_mbuf_free_chain(sdu); sdu = os_mbuf_get_pkthdr(&sdu_os_mbuf_pool, 0); assert(sdu != NULL); ble_l2cap_recv_ready(chan, sdu); } static void recv_cb(uint16_t conn_handle, struct ble_l2cap_chan *chan, struct os_mbuf *buf, void *arg) { struct l2cap_data_received_ev *ev = (void *) recv_cb_buf; struct channel *channel = find_channel(chan); assert(channel != NULL); ev->chan_id = channel->chan_id; ev->data_length = OS_MBUF_PKTLEN(buf); if (ev->data_length > TESTER_COC_MTU) { SYS_LOG_ERR("Too large sdu received, truncating data"); ev->data_length = TESTER_COC_MTU; } os_mbuf_copydata(buf, 0, ev->data_length, ev->data); tester_send(BTP_SERVICE_ID_L2CAP, L2CAP_EV_DATA_RECEIVED, CONTROLLER_INDEX, recv_cb_buf, sizeof(*ev) + ev->data_length); tester_l2cap_coc_recv(chan, buf); } static void unstalled_cb(uint16_t conn_handle, struct ble_l2cap_chan *chan, int status, void *arg) { if (status) { tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_SEND_DATA, CONTROLLER_INDEX, BTP_STATUS_FAILED); } else { tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_SEND_DATA, CONTROLLER_INDEX, BTP_STATUS_SUCCESS); } } static void reconfigured_ev(uint16_t conn_handle, struct ble_l2cap_chan *chan, struct ble_l2cap_chan_info *chan_info, int status) { struct l2cap_reconfigured_ev ev; struct channel *channel; if (status != 0) { return; } channel = find_channel(chan); assert(channel != NULL); ev.chan_id = channel->chan_id; ev.peer_mtu = chan_info->peer_coc_mtu; ev.peer_mps = chan_info->peer_l2cap_mtu; ev.our_mtu = chan_info->our_coc_mtu; ev.our_mps = chan_info->our_l2cap_mtu; tester_send(BTP_SERVICE_ID_L2CAP, L2CAP_EV_RECONFIGURED, CONTROLLER_INDEX, (uint8_t *) &ev, sizeof(ev)); } static void connected_cb(uint16_t conn_handle, struct ble_l2cap_chan *chan, struct ble_l2cap_chan_info *chan_info, void *arg) { struct l2cap_connected_ev ev; struct ble_gap_conn_desc desc; struct channel *channel = find_channel(chan); if (channel == NULL) { channel = get_free_channel(); } ev.chan_id = channel->chan_id; ev.psm = chan_info->psm; ev.peer_mtu = chan_info->peer_coc_mtu; ev.peer_mps = chan_info->peer_l2cap_mtu; ev.our_mtu = chan_info->our_coc_mtu; ev.our_mps = chan_info->our_l2cap_mtu; channel->state = 1; channel->chan = chan; if (!ble_gap_conn_find(conn_handle, &desc)) { ev.address_type = desc.peer_ota_addr.type; memcpy(ev.address, desc.peer_ota_addr.val, sizeof(ev.address)); } tester_send(BTP_SERVICE_ID_L2CAP, L2CAP_EV_CONNECTED, CONTROLLER_INDEX, (uint8_t *) &ev, sizeof(ev)); } static void disconnected_cb(uint16_t conn_handle, struct ble_l2cap_chan *chan, struct ble_l2cap_chan_info *chan_info, void *arg) { struct l2cap_disconnected_ev ev; struct ble_gap_conn_desc desc; struct channel *channel; memset(&ev, 0, sizeof(struct l2cap_disconnected_ev)); channel = find_channel(chan); assert(channel != NULL); channel->state = 0; channel->chan = chan; ev.chan_id = channel->chan_id; ev.psm = chan_info->psm; if (!ble_gap_conn_find(conn_handle, &desc)) { ev.address_type = desc.peer_ota_addr.type; memcpy(ev.address, desc.peer_ota_addr.val, sizeof(ev.address)); } tester_send(BTP_SERVICE_ID_L2CAP, L2CAP_EV_DISCONNECTED, CONTROLLER_INDEX, (uint8_t *) &ev, sizeof(ev)); } static int accept_cb(uint16_t conn_handle, uint16_t peer_mtu, struct ble_l2cap_chan *chan) { struct os_mbuf *sdu_rx; SYS_LOG_DBG("LE CoC accepting, chan: 0x%08lx, peer_mtu %d", (uint32_t) chan, peer_mtu); sdu_rx = os_mbuf_get_pkthdr(&sdu_os_mbuf_pool, 0); if (!sdu_rx) { return BLE_HS_ENOMEM; } ble_l2cap_recv_ready(chan, sdu_rx); return 0; } static int tester_l2cap_event(struct ble_l2cap_event *event, void *arg) { struct ble_l2cap_chan_info chan_info; int accept_response; switch (event->type) { case BLE_L2CAP_EVENT_COC_CONNECTED: if (ble_l2cap_get_chan_info(event->connect.chan, &chan_info)) { assert(0); } if (event->connect.status) { console_printf("LE COC error: %d\n", event->connect.status); disconnected_cb(event->connect.conn_handle, event->connect.chan, &chan_info, arg); return 0; } console_printf("LE COC connected, conn: %d, chan: 0x%08lx, " "psm: 0x%02x, scid: 0x%04x, dcid: 0x%04x, " "our_mps: %d, our_mtu: %d, peer_mps: %d, " "peer_mtu: %d\n", event->connect.conn_handle, (uint32_t) event->connect.chan, chan_info.psm, chan_info.scid, chan_info.dcid, chan_info.our_l2cap_mtu, chan_info.our_coc_mtu, chan_info.peer_l2cap_mtu, chan_info.peer_coc_mtu); connected_cb(event->connect.conn_handle, event->connect.chan, &chan_info, arg); return 0; case BLE_L2CAP_EVENT_COC_DISCONNECTED: if (ble_l2cap_get_chan_info(event->disconnect.chan, &chan_info)) { assert(0); } console_printf("LE CoC disconnected, chan: 0x%08lx\n", (uint32_t) event->disconnect.chan); disconnected_cb(event->disconnect.conn_handle, event->disconnect.chan, &chan_info, arg); return 0; case BLE_L2CAP_EVENT_COC_ACCEPT: accept_response = POINTER_TO_INT(arg); if (accept_response) { return accept_response; } console_printf("LE CoC accept, chan: 0x%08lx, handle: %u, sdu_size: %u\n", (uint32_t) event->accept.chan, event->accept.conn_handle, event->accept.peer_sdu_size); return accept_cb(event->accept.conn_handle, event->accept.peer_sdu_size, event->accept.chan); case BLE_L2CAP_EVENT_COC_DATA_RECEIVED: console_printf("LE CoC data received, chan: 0x%08lx, handle: %u, sdu_len: %u\n", (uint32_t) event->receive.chan, event->receive.conn_handle, OS_MBUF_PKTLEN(event->receive.sdu_rx)); recv_cb(event->receive.conn_handle, event->receive.chan, event->receive.sdu_rx, arg); return 0; case BLE_L2CAP_EVENT_COC_TX_UNSTALLED: console_printf("LE CoC tx unstalled, chan: 0x%08lx, handle: %u, status: %d\n", (uint32_t) event->tx_unstalled.chan, event->tx_unstalled.conn_handle, event->tx_unstalled.status); unstalled_cb(event->tx_unstalled.conn_handle, event->tx_unstalled.chan, event->tx_unstalled.status, arg); return 0; case BLE_L2CAP_EVENT_COC_RECONFIG_COMPLETED: if (ble_l2cap_get_chan_info(event->reconfigured.chan, &chan_info)) { assert(0); } console_printf("LE CoC reconfigure completed status 0x%02x, " "chan: 0x%08lx\n", event->reconfigured.status, (uint32_t) event->reconfigured.chan); if (event->reconfigured.status == 0) { console_printf("\t our_mps: %d our_mtu %d\n", chan_info.our_l2cap_mtu, chan_info.our_coc_mtu); } reconfigured_ev(event->reconfigured.conn_handle, event->reconfigured.chan, &chan_info, event->reconfigured.status); return 0; case BLE_L2CAP_EVENT_COC_PEER_RECONFIGURED: if (ble_l2cap_get_chan_info(event->reconfigured.chan, &chan_info)) { assert(0); } console_printf("LE CoC peer reconfigured status 0x%02x, " "chan: 0x%08lx\n", event->reconfigured.status, (uint32_t) event->reconfigured.chan); if (event->reconfigured.status == 0) { console_printf("\t peer_mps: %d peer_mtu %d\n", chan_info.peer_l2cap_mtu, chan_info.peer_coc_mtu); } reconfigured_ev(event->reconfigured.conn_handle, event->reconfigured.chan, &chan_info, event->reconfigured.status); return 0; default: return 0; } } static void connect(uint8_t *data, uint16_t len) { const struct l2cap_connect_cmd *cmd = (void *) data; uint8_t rp_buf[sizeof(struct l2cap_connect_rp) + cmd->num]; struct l2cap_connect_rp *rp = (void *) rp_buf; struct ble_gap_conn_desc desc; struct channel *chan; struct os_mbuf *sdu_rx[cmd->num]; ble_addr_t *addr = (void *) data; uint16_t mtu = htole16(cmd->mtu); int rc; int i; SYS_LOG_DBG("connect: type: %d addr: %s", addr->type, bt_hex(addr->val, 6)); if (mtu == 0 || mtu > TESTER_COC_MTU) { mtu = TESTER_COC_MTU; } rc = ble_gap_conn_find_by_addr(addr, &desc); if (rc) { SYS_LOG_ERR("GAP conn find failed"); goto fail; } rp->num = cmd->num; for (i = 0; i < cmd->num; i++) { chan = get_free_channel(); if (!chan) { SYS_LOG_ERR("No free channels"); goto fail; } rp->chan_ids[i] = chan->chan_id; sdu_rx[i] = os_mbuf_get_pkthdr(&sdu_os_mbuf_pool, 0); if (sdu_rx[i] == NULL) { SYS_LOG_ERR("Failed to alloc buf"); goto fail; } } if (cmd->num == 1) { rc = ble_l2cap_connect(desc.conn_handle, htole16(cmd->psm), mtu, sdu_rx[0], tester_l2cap_event, NULL); } else if (cmd->num > 1) { rc = ble_l2cap_enhanced_connect(desc.conn_handle, htole16(cmd->psm), mtu, cmd->num, sdu_rx, tester_l2cap_event, NULL); } else { SYS_LOG_ERR("Invalid 'num' parameter value"); goto fail; } if (rc) { SYS_LOG_ERR("L2CAP connect failed\n"); goto fail; } tester_send(BTP_SERVICE_ID_L2CAP, L2CAP_CONNECT, CONTROLLER_INDEX, (uint8_t *) rp, sizeof(rp_buf)); return; fail: tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_CONNECT, CONTROLLER_INDEX, BTP_STATUS_FAILED); } static void disconnect(const uint8_t *data, uint16_t len) { const struct l2cap_disconnect_cmd *cmd = (void *) data; struct channel *chan; uint8_t status; int err; SYS_LOG_DBG(""); chan = get_channel(cmd->chan_id); assert(chan != NULL); err = ble_l2cap_disconnect(chan->chan); if (err) { status = BTP_STATUS_FAILED; goto rsp; } status = BTP_STATUS_SUCCESS; rsp: tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_DISCONNECT, CONTROLLER_INDEX, status); } static void send_data(const uint8_t *data, uint16_t len) { const struct l2cap_send_data_cmd *cmd = (void *) data; struct os_mbuf *sdu_tx = NULL; int rc; uint16_t data_len = sys_le16_to_cpu(cmd->data_len); struct channel *chan = get_channel(cmd->chan_id); SYS_LOG_DBG("cmd->chan_id=%d", cmd->chan_id); if (!chan) { SYS_LOG_ERR("Invalid channel\n"); goto fail; } /* FIXME: For now, fail if data length exceeds buffer length */ if (data_len > TESTER_COC_MTU) { SYS_LOG_ERR("Data length exceeds buffer length"); goto fail; } sdu_tx = os_mbuf_get_pkthdr(&sdu_os_mbuf_pool, 0); if (sdu_tx == NULL) { SYS_LOG_ERR("No memory in the test sdu pool\n"); goto fail; } os_mbuf_append(sdu_tx, cmd->data, data_len); /* ble_l2cap_send takes ownership of the sdu */ rc = ble_l2cap_send(chan->chan, sdu_tx); if (rc == 0 || rc == BLE_HS_ESTALLED) { tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_SEND_DATA, CONTROLLER_INDEX, BTP_STATUS_SUCCESS); return; } SYS_LOG_ERR("Unable to send data: %d", rc); os_mbuf_free_chain(sdu_tx); fail: tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_SEND_DATA, CONTROLLER_INDEX, BTP_STATUS_FAILED); } static int l2cap_coc_err2hs_err(uint16_t coc_err) { switch (coc_err) { case BLE_L2CAP_COC_ERR_UNKNOWN_LE_PSM: return BLE_HS_ENOTSUP; case BLE_L2CAP_COC_ERR_NO_RESOURCES: return BLE_HS_ENOMEM; case BLE_L2CAP_COC_ERR_INSUFFICIENT_AUTHEN: return BLE_HS_EAUTHEN; case BLE_L2CAP_COC_ERR_INSUFFICIENT_AUTHOR: return BLE_HS_EAUTHOR; case BLE_L2CAP_COC_ERR_INSUFFICIENT_ENC: return BLE_HS_EENCRYPT; case BLE_L2CAP_COC_ERR_INSUFFICIENT_KEY_SZ: return BLE_HS_EENCRYPT_KEY_SZ; case BLE_L2CAP_COC_ERR_UNACCEPTABLE_PARAMETERS: return BLE_HS_EINVAL; default: return 0; } } static void listen(const uint8_t *data, uint16_t len) { const struct l2cap_listen_cmd *cmd = (void *) data; uint16_t mtu = htole16(cmd->mtu); uint16_t rsp = htole16(cmd->response); int rc; SYS_LOG_DBG(""); if (mtu == 0 || mtu > TESTER_COC_MTU) { mtu = TESTER_COC_MTU; } rsp = l2cap_coc_err2hs_err(rsp); /* TODO: Handle cmd->transport flag */ rc = ble_l2cap_create_server(cmd->psm, mtu, tester_l2cap_event, INT_TO_POINTER(rsp)); if (rc) { goto fail; } tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_LISTEN, CONTROLLER_INDEX, BTP_STATUS_SUCCESS); return; fail: tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_LISTEN, CONTROLLER_INDEX, BTP_STATUS_FAILED); } static void reconfigure(const uint8_t *data, uint16_t len) { const struct l2cap_reconfigure_cmd *cmd = (void *) data; uint16_t mtu = htole16(cmd->mtu); struct ble_gap_conn_desc desc; ble_addr_t *addr = (void *) data; struct ble_l2cap_chan *chans[cmd->num]; struct channel *channel; int rc; int i; SYS_LOG_DBG(""); if (mtu == 0 || mtu > TESTER_COC_MTU) { mtu = TESTER_COC_MTU; } rc = ble_gap_conn_find_by_addr(addr, &desc); if (rc) { SYS_LOG_ERR("GAP conn find failed"); goto fail; } for (i = 0; i < cmd->num; ++i) { channel = get_channel(cmd->idxs[i]); if (channel == NULL) { goto fail; } chans[i] = channel->chan; } rc = ble_l2cap_reconfig(chans, cmd->num, mtu); if (rc) { goto fail; } tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_RECONFIGURE, CONTROLLER_INDEX, BTP_STATUS_SUCCESS); return; fail: tester_rsp(BTP_SERVICE_ID_L2CAP, L2CAP_RECONFIGURE, CONTROLLER_INDEX, BTP_STATUS_FAILED); } static void supported_commands(uint8_t *data, uint16_t len) { uint8_t cmds[1]; struct l2cap_read_supported_commands_rp *rp = (void *) cmds; memset(cmds, 0, sizeof(cmds)); tester_set_bit(cmds, L2CAP_READ_SUPPORTED_COMMANDS); tester_set_bit(cmds, L2CAP_CONNECT); tester_set_bit(cmds, L2CAP_DISCONNECT); tester_set_bit(cmds, L2CAP_LISTEN); tester_set_bit(cmds, L2CAP_SEND_DATA); tester_set_bit(cmds, L2CAP_RECONFIGURE); tester_send(BTP_SERVICE_ID_L2CAP, L2CAP_READ_SUPPORTED_COMMANDS, CONTROLLER_INDEX, (uint8_t *) rp, sizeof(cmds)); } void tester_handle_l2cap(uint8_t opcode, uint8_t index, uint8_t *data, uint16_t len) { switch (opcode) { case L2CAP_READ_SUPPORTED_COMMANDS: supported_commands(data, len); return; case L2CAP_CONNECT: connect(data, len); return; case L2CAP_DISCONNECT: disconnect(data, len); return; case L2CAP_SEND_DATA: send_data(data, len); return; case L2CAP_LISTEN: listen(data, len); return; case L2CAP_RECONFIGURE: reconfigure(data, len); return; default: tester_rsp(BTP_SERVICE_ID_L2CAP, opcode, index, BTP_STATUS_UNKNOWN_CMD); return; } } uint8_t tester_init_l2cap(void) { int rc; /* For testing we want to support all the available channels */ rc = os_mempool_init(&sdu_coc_mbuf_mempool, TESTER_COC_BUF_COUNT, TESTER_COC_MTU, tester_sdu_coc_mem, "tester_coc_sdu_pool"); assert(rc == 0); rc = os_mbuf_pool_init(&sdu_os_mbuf_pool, &sdu_coc_mbuf_mempool, TESTER_COC_MTU, TESTER_COC_BUF_COUNT); assert(rc == 0); return BTP_STATUS_SUCCESS; } uint8_t tester_unregister_l2cap(void) { return BTP_STATUS_SUCCESS; } #endif |