mirror of
https://github.com/meshtastic/firmware.git
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GUVWAF
GitHub
commit
d8e644191b
@ -3,8 +3,8 @@
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#include "NodeDB.h"
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#include "SPILock.h"
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#include "configuration.h"
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#include "main.h"
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#include "error.h"
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#include "main.h"
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#include "mesh-pb-constants.h"
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#include <pb_decode.h>
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#include <pb_encode.h>
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@ -134,29 +134,29 @@ ErrorCode RadioLibInterface::send(MeshPacket *p)
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#endif
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// Sometimes when testing it is useful to be able to never turn on the xmitter
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// Sometimes when testing it is useful to be able to never turn on the xmitter
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#ifndef LORA_DISABLE_SENDING
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printPacket("enqueuing for send", p);
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printPacket("enqueuing for send", p);
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LOG_DEBUG("txGood=%d,rxGood=%d,rxBad=%d\n", txGood, rxGood, rxBad);
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ErrorCode res = txQueue.enqueue(p) ? ERRNO_OK : ERRNO_UNKNOWN;
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if (res != ERRNO_OK) { // we weren't able to queue it, so we must drop it to prevent leaks
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packetPool.release(p);
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return res;
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}
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// set (random) transmit delay to let others reconfigure their radio,
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// to avoid collisions and implement timing-based flooding
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// LOG_DEBUG("Set random delay before transmitting.\n");
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setTransmitDelay();
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LOG_DEBUG("txGood=%d,rxGood=%d,rxBad=%d\n", txGood, rxGood, rxBad);
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ErrorCode res = txQueue.enqueue(p) ? ERRNO_OK : ERRNO_UNKNOWN;
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if (res != ERRNO_OK) { // we weren't able to queue it, so we must drop it to prevent leaks
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packetPool.release(p);
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return res;
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}
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// set (random) transmit delay to let others reconfigure their radio,
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// to avoid collisions and implement timing-based flooding
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// LOG_DEBUG("Set random delay before transmitting.\n");
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setTransmitDelay();
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return res;
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#else
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packetPool.release(p);
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return ERRNO_DISABLED;
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#endif
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}
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}
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QueueStatus RadioLibInterface::getQueueStatus()
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{
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@ -169,246 +169,247 @@ QueueStatus RadioLibInterface::getQueueStatus()
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return qs;
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}
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bool RadioLibInterface::canSleep()
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{
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bool res = txQueue.empty();
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if (!res) // only print debug messages if we are vetoing sleep
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LOG_DEBUG("radio wait to sleep, txEmpty=%d\n", res);
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bool RadioLibInterface::canSleep()
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{
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bool res = txQueue.empty();
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if (!res) // only print debug messages if we are vetoing sleep
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LOG_DEBUG("radio wait to sleep, txEmpty=%d\n", res);
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return res;
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}
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return res;
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}
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/** Attempt to cancel a previously sent packet. Returns true if a packet was found we could cancel */
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bool RadioLibInterface::cancelSending(NodeNum from, PacketId id)
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{
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auto p = txQueue.remove(from, id);
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if (p)
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packetPool.release(p); // free the packet we just removed
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/** Attempt to cancel a previously sent packet. Returns true if a packet was found we could cancel */
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bool RadioLibInterface::cancelSending(NodeNum from, PacketId id)
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{
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auto p = txQueue.remove(from, id);
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if (p)
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packetPool.release(p); // free the packet we just removed
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bool result = (p != NULL);
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LOG_DEBUG("cancelSending id=0x%x, removed=%d\n", id, result);
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return result;
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}
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bool result = (p != NULL);
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LOG_DEBUG("cancelSending id=0x%x, removed=%d\n", id, result);
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return result;
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}
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/** radio helper thread callback.
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We never immediately transmit after any operation (either Rx or Tx). Instead we should wait a random multiple of
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'slotTimes' (see definition in RadioInterface.h) taken from a contention window (CW) to lower the chance of collision.
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The CW size is determined by setTransmitDelay() and depends either on the current channel utilization or SNR in case
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of a flooding message. After this, we perform channel activity detection (CAD) and reset the transmit delay if it is
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currently active.
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*/
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void RadioLibInterface::onNotify(uint32_t notification)
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{
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switch (notification) {
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case ISR_TX:
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handleTransmitInterrupt();
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startReceive();
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// LOG_DEBUG("tx complete - starting timer\n");
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startTransmitTimer();
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break;
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case ISR_RX:
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handleReceiveInterrupt();
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startReceive();
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// LOG_DEBUG("rx complete - starting timer\n");
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startTransmitTimer();
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break;
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case TRANSMIT_DELAY_COMPLETED:
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// LOG_DEBUG("delay done\n");
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/** radio helper thread callback.
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We never immediately transmit after any operation (either Rx or Tx). Instead we should wait a random multiple of
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'slotTimes' (see definition in RadioInterface.h) taken from a contention window (CW) to lower the chance of collision.
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The CW size is determined by setTransmitDelay() and depends either on the current channel utilization or SNR in case
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of a flooding message. After this, we perform channel activity detection (CAD) and reset the transmit delay if it is
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currently active.
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*/
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void RadioLibInterface::onNotify(uint32_t notification)
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{
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switch (notification) {
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case ISR_TX:
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handleTransmitInterrupt();
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startReceive();
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// LOG_DEBUG("tx complete - starting timer\n");
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startTransmitTimer();
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break;
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case ISR_RX:
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handleReceiveInterrupt();
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startReceive();
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// LOG_DEBUG("rx complete - starting timer\n");
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startTransmitTimer();
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break;
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case TRANSMIT_DELAY_COMPLETED:
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// LOG_DEBUG("delay done\n");
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// If we are not currently in receive mode, then restart the random delay (this can happen if the main thread
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// has placed the unit into standby) FIXME, how will this work if the chipset is in sleep mode?
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if (!txQueue.empty()) {
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if (!canSendImmediately()) {
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// LOG_DEBUG("Currently Rx/Tx-ing: set random delay\n");
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setTransmitDelay(); // currently Rx/Tx-ing: reset random delay
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// If we are not currently in receive mode, then restart the random delay (this can happen if the main thread
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// has placed the unit into standby) FIXME, how will this work if the chipset is in sleep mode?
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if (!txQueue.empty()) {
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if (!canSendImmediately()) {
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// LOG_DEBUG("Currently Rx/Tx-ing: set random delay\n");
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setTransmitDelay(); // currently Rx/Tx-ing: reset random delay
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} else {
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if (isChannelActive()) { // check if there is currently a LoRa packet on the channel
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// LOG_DEBUG("Channel is active: set random delay\n");
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setTransmitDelay(); // reset random delay
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} else {
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if (isChannelActive()) { // check if there is currently a LoRa packet on the channel
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// LOG_DEBUG("Channel is active: set random delay\n");
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setTransmitDelay(); // reset random delay
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} else {
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// Send any outgoing packets we have ready
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MeshPacket *txp = txQueue.dequeue();
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assert(txp);
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startSend(txp);
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// Send any outgoing packets we have ready
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MeshPacket *txp = txQueue.dequeue();
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assert(txp);
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startSend(txp);
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// Packet has been sent, count it toward our TX airtime utilization.
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uint32_t xmitMsec = getPacketTime(txp);
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airTime->logAirtime(TX_LOG, xmitMsec);
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}
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// Packet has been sent, count it toward our TX airtime utilization.
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uint32_t xmitMsec = getPacketTime(txp);
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airTime->logAirtime(TX_LOG, xmitMsec);
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}
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} else {
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// LOG_DEBUG("done with txqueue\n");
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}
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break;
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default:
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assert(0); // We expected to receive a valid notification from the ISR
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}
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}
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void RadioLibInterface::setTransmitDelay()
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{
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MeshPacket *p = txQueue.getFront();
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// We want all sending/receiving to be done by our daemon thread.
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// We use a delay here because this packet might have been sent in response to a packet we just received.
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// So we want to make sure the other side has had a chance to reconfigure its radio.
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/* We assume if rx_snr = 0 and rx_rssi = 0, the packet was generated locally.
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* This assumption is valid because of the offset generated by the radio to account for the noise
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* floor.
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*/
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if (p->rx_snr == 0 && p->rx_rssi == 0) {
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startTransmitTimer(true);
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} else {
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// If there is a SNR, start a timer scaled based on that SNR.
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LOG_DEBUG("rx_snr found. hop_limit:%d rx_snr:%f\n", p->hop_limit, p->rx_snr);
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startTransmitTimerSNR(p->rx_snr);
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// LOG_DEBUG("done with txqueue\n");
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}
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break;
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default:
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assert(0); // We expected to receive a valid notification from the ISR
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}
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}
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void RadioLibInterface::setTransmitDelay()
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{
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MeshPacket *p = txQueue.getFront();
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// We want all sending/receiving to be done by our daemon thread.
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// We use a delay here because this packet might have been sent in response to a packet we just received.
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// So we want to make sure the other side has had a chance to reconfigure its radio.
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/* We assume if rx_snr = 0 and rx_rssi = 0, the packet was generated locally.
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* This assumption is valid because of the offset generated by the radio to account for the noise
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* floor.
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*/
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if (p->rx_snr == 0 && p->rx_rssi == 0) {
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startTransmitTimer(true);
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} else {
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// If there is a SNR, start a timer scaled based on that SNR.
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LOG_DEBUG("rx_snr found. hop_limit:%d rx_snr:%f\n", p->hop_limit, p->rx_snr);
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startTransmitTimerSNR(p->rx_snr);
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}
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}
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void RadioLibInterface::startTransmitTimer(bool withDelay)
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{
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// If we have work to do and the timer wasn't already scheduled, schedule it now
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if (!txQueue.empty()) {
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uint32_t delay = !withDelay ? 1 : getTxDelayMsec();
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// LOG_DEBUG("xmit timer %d\n", delay);
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notifyLater(delay, TRANSMIT_DELAY_COMPLETED, false); // This will implicitly enable
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}
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}
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void RadioLibInterface::startTransmitTimerSNR(float snr)
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{
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// If we have work to do and the timer wasn't already scheduled, schedule it now
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if (!txQueue.empty()) {
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uint32_t delay = getTxDelayMsecWeighted(snr);
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// LOG_DEBUG("xmit timer %d\n", delay);
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notifyLater(delay, TRANSMIT_DELAY_COMPLETED, false); // This will implicitly enable
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}
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}
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void RadioLibInterface::handleTransmitInterrupt()
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{
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// LOG_DEBUG("handling lora TX interrupt\n");
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// This can be null if we forced the device to enter standby mode. In that case
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// ignore the transmit interrupt
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if (sendingPacket)
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completeSending();
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}
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void RadioLibInterface::completeSending()
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{
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// We are careful to clear sending packet before calling printPacket because
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// that can take a long time
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auto p = sendingPacket;
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sendingPacket = NULL;
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if (p) {
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txGood++;
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printPacket("Completed sending", p);
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// We are done sending that packet, release it
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packetPool.release(p);
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// LOG_DEBUG("Done with send\n");
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}
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}
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void RadioLibInterface::handleReceiveInterrupt()
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{
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uint32_t xmitMsec;
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// when this is called, we should be in receive mode - if we are not, just jump out instead of bombing. Possible Race
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// Condition?
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if (!isReceiving) {
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LOG_DEBUG("*** WAS_ASSERT *** handleReceiveInterrupt called when not in receive mode\n");
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return;
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}
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void RadioLibInterface::startTransmitTimer(bool withDelay)
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{
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// If we have work to do and the timer wasn't already scheduled, schedule it now
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if (!txQueue.empty()) {
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uint32_t delay = !withDelay ? 1 : getTxDelayMsec();
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// LOG_DEBUG("xmit timer %d\n", delay);
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notifyLater(delay, TRANSMIT_DELAY_COMPLETED, false); // This will implicitly enable
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}
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}
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isReceiving = false;
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void RadioLibInterface::startTransmitTimerSNR(float snr)
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{
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// If we have work to do and the timer wasn't already scheduled, schedule it now
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if (!txQueue.empty()) {
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uint32_t delay = getTxDelayMsecWeighted(snr);
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// LOG_DEBUG("xmit timer %d\n", delay);
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notifyLater(delay, TRANSMIT_DELAY_COMPLETED, false); // This will implicitly enable
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}
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}
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// read the number of actually received bytes
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size_t length = iface->getPacketLength();
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void RadioLibInterface::handleTransmitInterrupt()
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{
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// LOG_DEBUG("handling lora TX interrupt\n");
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// This can be null if we forced the device to enter standby mode. In that case
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// ignore the transmit interrupt
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if (sendingPacket)
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completeSending();
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}
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xmitMsec = getPacketTime(length);
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void RadioLibInterface::completeSending()
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{
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// We are careful to clear sending packet before calling printPacket because
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// that can take a long time
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auto p = sendingPacket;
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sendingPacket = NULL;
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int state = iface->readData(radiobuf, length);
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if (state != RADIOLIB_ERR_NONE) {
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LOG_ERROR("ignoring received packet due to error=%d\n", state);
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rxBad++;
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if (p) {
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txGood++;
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printPacket("Completed sending", p);
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airTime->logAirtime(RX_ALL_LOG, xmitMsec);
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// We are done sending that packet, release it
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packetPool.release(p);
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// LOG_DEBUG("Done with send\n");
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}
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}
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} else {
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// Skip the 4 headers that are at the beginning of the rxBuf
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int32_t payloadLen = length - sizeof(PacketHeader);
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const uint8_t *payload = radiobuf + sizeof(PacketHeader);
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void RadioLibInterface::handleReceiveInterrupt()
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{
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uint32_t xmitMsec;
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// when this is called, we should be in receive mode - if we are not, just jump out instead of bombing. Possible Race Condition?
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if (!isReceiving) {
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LOG_DEBUG("*** WAS_ASSERT *** handleReceiveInterrupt called when not in receive mode\n");
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return;
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}
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isReceiving = false;
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// read the number of actually received bytes
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size_t length = iface->getPacketLength();
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xmitMsec = getPacketTime(length);
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int state = iface->readData(radiobuf, length);
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if (state != RADIOLIB_ERR_NONE) {
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LOG_ERROR("ignoring received packet due to error=%d\n", state);
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// check for short packets
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if (payloadLen < 0) {
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LOG_WARN("ignoring received packet too short\n");
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rxBad++;
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airTime->logAirtime(RX_ALL_LOG, xmitMsec);
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} else {
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// Skip the 4 headers that are at the beginning of the rxBuf
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int32_t payloadLen = length - sizeof(PacketHeader);
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const uint8_t *payload = radiobuf + sizeof(PacketHeader);
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// check for short packets
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if (payloadLen < 0) {
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LOG_WARN("ignoring received packet too short\n");
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rxBad++;
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airTime->logAirtime(RX_ALL_LOG, xmitMsec);
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} else {
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const PacketHeader *h = (PacketHeader *)radiobuf;
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rxGood++;
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// altered packet with "from == 0" can do Remote Node Administration without permission
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if (h->from == 0) {
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LOG_WARN("ignoring received packet without sender\n");
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return;
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}
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// Note: we deliver _all_ packets to our router (i.e. our interface is intentionally promiscuous).
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// This allows the router and other apps on our node to sniff packets (usually routing) between other
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// nodes.
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MeshPacket *mp = packetPool.allocZeroed();
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mp->from = h->from;
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mp->to = h->to;
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mp->id = h->id;
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mp->channel = h->channel;
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assert(HOP_MAX <= PACKET_FLAGS_HOP_MASK); // If hopmax changes, carefully check this code
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mp->hop_limit = h->flags & PACKET_FLAGS_HOP_MASK;
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mp->want_ack = !!(h->flags & PACKET_FLAGS_WANT_ACK_MASK);
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addReceiveMetadata(mp);
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mp->which_payload_variant = MeshPacket_encrypted_tag; // Mark that the payload is still encrypted at this point
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assert(((uint32_t)payloadLen) <= sizeof(mp->encrypted.bytes));
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memcpy(mp->encrypted.bytes, payload, payloadLen);
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mp->encrypted.size = payloadLen;
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printPacket("Lora RX", mp);
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airTime->logAirtime(RX_LOG, xmitMsec);
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deliverToReceiver(mp);
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}
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}
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}
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/** start an immediate transmit */
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void RadioLibInterface::startSend(MeshPacket * txp)
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{
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printPacket("Starting low level send", txp);
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if (disabled || !config.lora.tx_enabled) {
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LOG_WARN("startSend is dropping tx packet because we are disabled\n");
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packetPool.release(txp);
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} else {
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setStandby(); // Cancel any already in process receives
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configHardwareForSend(); // must be after setStandby
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size_t numbytes = beginSending(txp);
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int res = iface->startTransmit(radiobuf, numbytes);
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if (res != RADIOLIB_ERR_NONE) {
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LOG_ERROR("startTransmit failed, error=%d\n", res);
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RECORD_CRITICALERROR(CriticalErrorCode_RADIO_SPI_BUG);
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// This send failed, but make sure to 'complete' it properly
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completeSending();
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startReceive(); // Restart receive mode (because startTransmit failed to put us in xmit mode)
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const PacketHeader *h = (PacketHeader *)radiobuf;
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rxGood++;
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// altered packet with "from == 0" can do Remote Node Administration without permission
|
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if (h->from == 0) {
|
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LOG_WARN("ignoring received packet without sender\n");
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return;
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}
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|
||||
// Must be done AFTER, starting transmit, because startTransmit clears (possibly stale) interrupt pending register
|
||||
// bits
|
||||
enableInterrupt(isrTxLevel0);
|
||||
// Note: we deliver _all_ packets to our router (i.e. our interface is intentionally promiscuous).
|
||||
// This allows the router and other apps on our node to sniff packets (usually routing) between other
|
||||
// nodes.
|
||||
MeshPacket *mp = packetPool.allocZeroed();
|
||||
|
||||
mp->from = h->from;
|
||||
mp->to = h->to;
|
||||
mp->id = h->id;
|
||||
mp->channel = h->channel;
|
||||
assert(HOP_MAX <= PACKET_FLAGS_HOP_MASK); // If hopmax changes, carefully check this code
|
||||
mp->hop_limit = h->flags & PACKET_FLAGS_HOP_MASK;
|
||||
mp->want_ack = !!(h->flags & PACKET_FLAGS_WANT_ACK_MASK);
|
||||
|
||||
addReceiveMetadata(mp);
|
||||
|
||||
mp->which_payload_variant = MeshPacket_encrypted_tag; // Mark that the payload is still encrypted at this point
|
||||
assert(((uint32_t)payloadLen) <= sizeof(mp->encrypted.bytes));
|
||||
memcpy(mp->encrypted.bytes, payload, payloadLen);
|
||||
mp->encrypted.size = payloadLen;
|
||||
|
||||
printPacket("Lora RX", mp);
|
||||
|
||||
airTime->logAirtime(RX_LOG, xmitMsec);
|
||||
|
||||
deliverToReceiver(mp);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/** start an immediate transmit */
|
||||
void RadioLibInterface::startSend(MeshPacket *txp)
|
||||
{
|
||||
printPacket("Starting low level send", txp);
|
||||
if (disabled || !config.lora.tx_enabled) {
|
||||
LOG_WARN("startSend is dropping tx packet because we are disabled\n");
|
||||
packetPool.release(txp);
|
||||
} else {
|
||||
setStandby(); // Cancel any already in process receives
|
||||
|
||||
configHardwareForSend(); // must be after setStandby
|
||||
|
||||
size_t numbytes = beginSending(txp);
|
||||
|
||||
int res = iface->startTransmit(radiobuf, numbytes);
|
||||
if (res != RADIOLIB_ERR_NONE) {
|
||||
LOG_ERROR("startTransmit failed, error=%d\n", res);
|
||||
RECORD_CRITICALERROR(CriticalErrorCode_RADIO_SPI_BUG);
|
||||
|
||||
// This send failed, but make sure to 'complete' it properly
|
||||
completeSending();
|
||||
startReceive(); // Restart receive mode (because startTransmit failed to put us in xmit mode)
|
||||
}
|
||||
|
||||
// Must be done AFTER, starting transmit, because startTransmit clears (possibly stale) interrupt pending register
|
||||
// bits
|
||||
enableInterrupt(isrTxLevel0);
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user