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https://github.com/meshtastic/firmware.git
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585805c3b9
* Set `hop_start` in header to determine how many hops each packet traveled * Set hopLimit of response according to hops used by request * Identify neighbors based on `hopStart` and `hopLimit` * NeighborInfo: get all packets and assume a default broadcast interval * Add fail-safe in case node in between is running modified firmware * Add `viaMQTT` and `hopsAway` to NodeInfo * Replace `HOP_RELIABLE` with hopStart for repeated packet --------- Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
67 lines
2.7 KiB
C++
67 lines
2.7 KiB
C++
#include "RoutingModule.h"
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#include "MeshService.h"
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#include "NodeDB.h"
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#include "Router.h"
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#include "configuration.h"
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#include "main.h"
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RoutingModule *routingModule;
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bool RoutingModule::handleReceivedProtobuf(const meshtastic_MeshPacket &mp, meshtastic_Routing *r)
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{
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printPacket("Routing sniffing", &mp);
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router->sniffReceived(&mp, r);
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// FIXME - move this to a non promsicious PhoneAPI module?
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// Note: we are careful not to send back packets that started with the phone back to the phone
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if ((mp.to == NODENUM_BROADCAST || mp.to == nodeDB.getNodeNum()) && (mp.from != 0)) {
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printPacket("Delivering rx packet", &mp);
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service.handleFromRadio(&mp);
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}
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return false; // Let others look at this message also if they want
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}
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meshtastic_MeshPacket *RoutingModule::allocReply()
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{
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if (config.device.role == meshtastic_Config_DeviceConfig_Role_REPEATER)
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return NULL;
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assert(currentRequest);
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// We only consider making replies if the request was a legit routing packet (not just something we were sniffing)
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if (currentRequest->decoded.portnum == meshtastic_PortNum_ROUTING_APP) {
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assert(0); // 1.2 refactoring fixme, Not sure if anything needs this yet?
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// return allocDataProtobuf(u);
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}
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return NULL;
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}
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void RoutingModule::sendAckNak(meshtastic_Routing_Error err, NodeNum to, PacketId idFrom, ChannelIndex chIndex, uint8_t hopStart,
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uint8_t hopLimit)
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{
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auto p = allocAckNak(err, to, idFrom, chIndex, hopStart, hopLimit);
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router->sendLocal(p); // we sometimes send directly to the local node
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}
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uint8_t RoutingModule::getHopLimitForResponse(uint8_t hopStart, uint8_t hopLimit)
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{
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if (hopStart != 0) {
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// Hops used by the request. If somebody in between running modified firmware modified it, ignore it
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uint8_t hopsUsed = hopStart < hopLimit ? config.lora.hop_limit : hopStart - hopLimit;
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if (hopsUsed > config.lora.hop_limit) {
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return hopsUsed; // If the request used more hops than the limit, use the same amount of hops
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} else if (hopsUsed + 2 < config.lora.hop_limit) {
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return hopsUsed + 2; // Use only the amount of hops needed with some margin as the way back may be different
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}
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}
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return config.lora.hop_limit; // Use the default hop limit
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}
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RoutingModule::RoutingModule() : ProtobufModule("routing", meshtastic_PortNum_ROUTING_APP, &meshtastic_Routing_msg)
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{
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isPromiscuous = true;
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encryptedOk = config.device.rebroadcast_mode != meshtastic_Config_DeviceConfig_RebroadcastMode_LOCAL_ONLY &&
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config.device.rebroadcast_mode != meshtastic_Config_DeviceConfig_RebroadcastMode_KNOWN_ONLY;
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}
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