replaced string for hash in 25segBuffer

include/station_utils.h

@@ -1,17 +1,17 @@
 /* Copyright (C) 2025 Ricardo Guzman - CA2RXU
- * 
+ *
  * This file is part of LoRa APRS iGate.
- * 
+ *
  * LoRa APRS iGate is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or 
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- * 
+ *
  * LoRa APRS iGate is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public License
  * along with LoRa APRS iGate. If not, see <https://www.gnu.org/licenses/>.
  */
@@ -37,8 +37,7 @@ namespace STATION_Utils {
     void deleteNotHeard();
     void updateLastHeard(const String& station);
     bool wasHeard(const String& station);
-    void clean25SegBuffer();
+    bool isIn25SegHashBuffer(const String& station, const String& textMessage);
-    bool check25SegBuffer(const String& station, const String& textMessage);
     void processOutputPacketBufferUltraEcoMode();
     void processOutputPacketBuffer();
     void addToOutputPacketBuffer(const String& packet, bool flag = false);

src/LoRa_APRS_iGate.cpp

@@ -188,7 +188,6 @@ void loop() {
             }
 
             if (Config.loramodule.txActive && (Config.digi.mode == 2 || Config.digi.mode == 3 || backupDigiMode)) { // If Digi enabled
-                STATION_Utils::clean25SegBuffer();
                 DIGI_Utils::processLoRaPacket(packet); // Send received packet to Digi
             }
 

src/digi_utils.cpp

@@ -149,28 +149,28 @@ namespace DIGI_Utils {
         if (Sender == stationCallsign) return;          // Avoid listening to self packets
         if (!thirdPartyPacket && Config.tacticalCallsign == "" && !Utils::callsignIsValid(Sender)) return;  // No thirdParty + no tactical y no valid callsign
 
-        if (STATION_Utils::check25SegBuffer(Sender, temp.substring(temp.indexOf(":") + 2))) {
+        if (STATION_Utils::isIn25SegHashBuffer(Sender, temp.substring(temp.indexOf(":") + 2))) return;
-            STATION_Utils::updateLastHeard(Sender);
-            Utils::typeOfPacket(temp, 2);               // Digi
-            bool queryMessage = false;
-            int doubleColonIndex = temp.indexOf("::");
-            if (doubleColonIndex > 10) {                // it's a message
-                String AddresseeAndMessage  = temp.substring(doubleColonIndex + 2);
-                String Addressee            = AddresseeAndMessage.substring(0, AddresseeAndMessage.indexOf(":"));
-                Addressee.trim();
-                if (Addressee == stationCallsign) {     // it's a message for me!
-                    queryMessage = APRS_IS_Utils::processReceivedLoRaMessage(Sender, AddresseeAndMessage, thirdPartyPacket);
-                }
-            }
-            if (queryMessage) return;                   // answer should not be repeated.
 
-            String loraPacket = generateDigipeatedPacket(packet.substring(3), thirdPartyPacket);
+        STATION_Utils::updateLastHeard(Sender);
-            if (loraPacket != "") {
+        Utils::typeOfPacket(temp, 2);               // Digi
-                STATION_Utils::addToOutputPacketBuffer(loraPacket);
+        bool queryMessage = false;
-                if (Config.digi.ecoMode != 1) displayToggle(true);
+        int doubleColonIndex = temp.indexOf("::");
-                lastScreenOn = millis();
+        if (doubleColonIndex > 10) {                // it's a message
+            String AddresseeAndMessage  = temp.substring(doubleColonIndex + 2);
+            String Addressee            = AddresseeAndMessage.substring(0, AddresseeAndMessage.indexOf(":"));
+            Addressee.trim();
+            if (Addressee == stationCallsign) {     // it's a message for me!
+                queryMessage = APRS_IS_Utils::processReceivedLoRaMessage(Sender, AddresseeAndMessage, thirdPartyPacket);
             }
         }
+        if (queryMessage) return;                   // answer should not be repeated.
+
+        String loraPacket = generateDigipeatedPacket(packet.substring(3), thirdPartyPacket);
+        if (loraPacket != "") {
+            STATION_Utils::addToOutputPacketBuffer(loraPacket);
+            if (Config.digi.ecoMode != 1) displayToggle(true);
+            lastScreenOn = millis();
+        }
     }
 
 }

src/station_utils.cpp

@@ -1,17 +1,17 @@
 /* Copyright (C) 2025 Ricardo Guzman - CA2RXU
- * 
+ *
  * This file is part of LoRa APRS iGate.
- * 
+ *
  * LoRa APRS iGate is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or 
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- * 
+ *
  * LoRa APRS iGate is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public License
  * along with LoRa APRS iGate. If not, see <https://www.gnu.org/licenses/>.
  */
@@ -45,12 +45,10 @@ std::vector<OutputPacketBuffer> outputPacketBuffer;
 
 struct Packet25SegBuffer {
     uint32_t    receivedTime;
-    String      station;
+    uint32_t    hash;
-    String      payload;
 };
 std::vector<Packet25SegBuffer>  packet25SegBuffer;
 
-
 bool saveNewDigiEcoModeConfig   = false;
 bool packetIsBeacon             = false;
 
@@ -166,18 +164,33 @@ namespace STATION_Utils {
         return false;
     }
 
-    void clean25SegBuffer() {
+    void clean25SegHashBuffer() {
-        if (!packet25SegBuffer.empty() && (millis() - packet25SegBuffer[0].receivedTime) >  25 * 1000) packet25SegBuffer.erase(packet25SegBuffer.begin());
+        uint32_t currentTime = millis();
-    }
+        for (int i = packet25SegBuffer.size() - 1; i >= 0; i--) {
-
+            if ((currentTime - packet25SegBuffer[i].receivedTime) > 25 * 1000) {
-    bool check25SegBuffer(const String& station, const String& textMessage) {
+                packet25SegBuffer.erase(packet25SegBuffer.begin() + i);
-        if (!packet25SegBuffer.empty()) {
-            for (int i = 0; i < packet25SegBuffer.size(); i++) {
-                if (packet25SegBuffer[i].station == station && packet25SegBuffer[i].payload == textMessage) return false;
             }
         }
-        packet25SegBuffer.emplace_back(Packet25SegBuffer{millis(), station, textMessage});
+    }
-        return true;
+
+    uint32_t makeHash(const String& station, const String& payload) {   // DJB2 Hash
+        uint32_t h = 5381;
+        for (size_t i = 0; i < station.length(); i++)
+            h = ((h << 5) + h) + station[i];
+        for (size_t i = 0; i < payload.length(); i++)
+            h = ((h << 5) + h) + payload[i];
+        return h;
+    }
+
+    bool isIn25SegHashBuffer(const String& station, const String& textMessage) {
+        uint32_t newHash = makeHash(station, textMessage);
+        uint32_t currentTime = millis();
+        clean25SegHashBuffer();
+        for (int i = 0; i < packet25SegBuffer.size(); i++) {
+            if (packet25SegBuffer[i].hash == newHash) return true;
+        }
+        packet25SegBuffer.push_back({currentTime, newHash});
+        return false;
     }
 
     void processOutputPacketBufferUltraEcoMode() {