diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ant/ant_encryption/ant_encrypt_negotiation_slave.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ant/ant_encryption/ant_encrypt_negotiation_slave.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ant/ant_encryption/ant_encrypt_negotiation_slave.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ant/ant_encryption/ant_encrypt_negotiation_slave.c new file mode 100644 index 0000000..715fe14 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ant/ant_encryption/ant_encrypt_negotiation_slave.c @@ -0,0 +1,185 @@ +/** + * Copyright (c) 2015 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include "sdk_common.h" +#if NRF_MODULE_ENABLED(ANT_ENCRYPT_NEGOTIATION_SLAVE) +#include <stdlib.h> +#include <string.h> +#include "ant_encrypt_config.h" +#include "ant_interface.h" +#include "ant_parameters.h" +#include "nrf_error.h" +#include "app_error.h" + +#include "ant_encrypt_negotiation_slave.h" + +/** Number of supported channels. */ +#define NUMBER_OF_CHANNELS (NRF_SDH_ANT_TOTAL_CHANNELS_ALLOCATED) + +/** Flag to block other channels from attempting to enable encryption while + * another encryption is in the process. + */ +static volatile bool m_can_enable_crypto = true; + +/** Array to keep track of which channels are currently tracking. */ +static ant_encrypt_tracking_state_t m_encrypt_channel_states[NUMBER_OF_CHANNELS]; + +/** Array for the slave channels' encryption settings. */ +static ant_encrypt_channel_settings_t m_slave_channel_conf[MAX_ANT_CHANNELS]; + + + +void ant_channel_encryp_tracking_state_set(uint8_t channel_number, + ant_encrypt_tracking_state_t state) +{ + m_encrypt_channel_states[channel_number] = state; +} + + +void ant_channel_encryp_negotiation_slave_init(void) +{ + for (uint32_t channel = 0; channel < NUMBER_OF_CHANNELS; channel++) + { + ant_channel_encryp_tracking_state_set(channel, ANT_ENC_CHANNEL_STAT_TRACKING_UNSUPPORTED); + } + + m_can_enable_crypto = true; +} + + +ant_encrypt_tracking_state_t ant_channel_encryp_tracking_state_get(uint8_t channel_number) +{ + return m_encrypt_channel_states[channel_number]; +} + + +void ant_slave_channel_encrypt_config(uint8_t channel_number, + ant_encrypt_channel_settings_t const * const p_crypto_config) +{ + memcpy(&m_slave_channel_conf[channel_number], p_crypto_config, + sizeof(ant_encrypt_channel_settings_t)); +} + + +/**@brief Function for handling ANT RX channel events. + * + * @param[in] p_event_message_buffer The ANT event message buffer. + */ +static void ant_slave_encrypt_try_enable(uint8_t ant_channel, + uint8_t ant_message_id) +{ + uint32_t err_code; + ant_encrypt_tracking_state_t track_stat; + + + switch (ant_message_id) + { + // Broadcast data received. + case MESG_BROADCAST_DATA_ID: + + track_stat = ant_channel_encryp_tracking_state_get(ant_channel); + // If the encryption has not yet been negotiated for this channel and another channel + // is not currently trying to enable encryption, enable encryption + if ((track_stat != ANT_ENC_CHANNEL_STAT_TRACKING_DECRYPTED) + && (track_stat != ANT_ENC_CHANNEL_STAT_NEGOTIATING) + && m_can_enable_crypto) + { + // Block other channels from trying to enable encryption until this channel + // is finished + m_can_enable_crypto = false; + ant_channel_encryp_tracking_state_set(ant_channel, + ANT_ENC_CHANNEL_STAT_NEGOTIATING); + + // Enable encryption on ant_channel + err_code = + ant_channel_encrypt_config_perform(ant_channel, + &m_slave_channel_conf[ant_channel]); + APP_ERROR_CHECK(err_code); + } + break; + + default: + break; + } +} + + +void ant_slave_encrypt_negotiation(ant_evt_t * p_ant_evt) +{ + ant_encrypt_tracking_state_t track_state = + ant_channel_encryp_tracking_state_get(p_ant_evt->channel); + + if (track_state == ANT_ENC_CHANNEL_STAT_TRACKING_UNSUPPORTED) + return; + + switch (p_ant_evt->event) + { + case EVENT_RX_FAIL_GO_TO_SEARCH: + if (track_state == ANT_ENC_CHANNEL_STAT_NEGOTIATING) + { + m_can_enable_crypto = true; + } + + ant_channel_encryp_tracking_state_set(p_ant_evt->channel, + ANT_ENC_CHANNEL_STAT_NOT_TRACKING); + break; + + case EVENT_RX: + ant_slave_encrypt_try_enable(p_ant_evt->channel, + p_ant_evt->message.ANT_MESSAGE_ucMesgID); + break; + + case EVENT_ENCRYPT_NEGOTIATION_SUCCESS: + m_can_enable_crypto = true; + ant_channel_encryp_tracking_state_set(p_ant_evt->channel, + ANT_ENC_CHANNEL_STAT_TRACKING_DECRYPTED); + break; + + case EVENT_ENCRYPT_NEGOTIATION_FAIL: + m_can_enable_crypto = true; + ant_channel_encryp_tracking_state_set(p_ant_evt->channel, + ANT_ENC_CHANNEL_STAT_TRACKING_ENCRYPTED); + break; + + default: + break; + } +} + +#endif // NRF_MODULE_ENABLED(ANT_ENCRYPT_NEGOTIATION_SLAVE) |