Updates to take out UDP and do this at the AX.25 level

CRAPRNIAC Protocol.md

@@ -1,4 +1,4 @@
-# CRAPRNIAC: Completely Ridiculous Amateur Protocol for Radio Node IP Auto-Configuration
+# CRAPRNIAC: Completely Ridiculous Amateur Protocol for Radio Node IP Address Configuration
 
 ## Status of this Memo
 
@@ -8,10 +8,9 @@ This document describes version 0.1a of CRAPRNIAC, a protocol designed to facili
 
 Existing service discovery and dynamic host configuration protocols for TCP/IP networks are not ideal for bandwidth-constrained, high-latency, and lossy VHF packet radio environments. CRAPRNIAC addresses this by defining a join-and-configure protocol between a "base station" and one or more "client stations" that aims to cut the chatter.
 
-The goal is to:
-- Minimize the number of packet exchanges required for a client to join a VHF packet network.
-- Allow manual or automatic IP configuration with a minimum of overhead.
-- Bring honor to you and your house.
+The goals are to:
+- Let a client discover a nearby base station, request an IP address, and join a packet network.
+- Bring honor to you and your house?
 
 ## 2. Protocol Overview
 
@@ -26,6 +25,8 @@ CRAPRNIAC defines four primary message types:
 
 Messages are transmitted as plain ASCII text using simple pipe-separated (`|`) fields, allowing easy parsing by humans and computers alike.
 
+The protocol is versioned and extensible to allow for a future in which this is relevant enough for there to be concern over compatibility.
+
 ## 3. Message Format
 
 Each CRAPRNIAC message is a single text string with the following general format:
@@ -93,26 +94,26 @@ Fields:
 
 ## 6. Design Considerations
 
-- **Minimal Airtime Usage:** Critical for low-bandwidth links.
-- **Human-Readable:** Easy troubleshooting with a dumb terminal.
-- **Flexibility:** Can extend in future versions with additional fields.
-- **Backward Compatibility:** Protocol version prefix allows for graceful upgrades.
+- Make it, despite its name, not crappy
 
 ## 7. Security Considerations
 
-The S in CRAPRNIAC stands for Security!
+That's what the 'S' in CRAPRNIAC stands for.
 
 ## 8. Other Considerations
 
-CRAPRNIAC will squat on whatever amateur frequencies operators choose.
+- CRAPRNIAC does not prescribe a particular lower-layer protocol, though it is designed with a working AX.25 stack in mind, whether that's a classic serial TNC, a more modern bluetooth doodad, or Direwolf with kissattach creating an ax0 interface. The example implementation uses UDP packets over IP over AX.25.
+- CRAPRNIAC will squat on an amateur frequency of the operator's choice.
 
 ## 9. Conclusion
 
-CRAPRNIAC provides a starting point for connecting TCP/IP stacks over slow amateur radio links. By limiting the number and length of transmissions required for negotiation, it offers networking over VHF that works like it smells.
+CRAPRNIAC provides a starting point for connecting TCP/IP stacks over slow amateur radio links. By limiting the number and length of transmissions required for negotiation, it offers networking over VHF that works as nice as it smells.
 
 ## 10. Further Development
 
-Future enhancements may include optional mesh extensions self-organizing slowness.
+- Future enhancements may include optional mesh extensions for self-organizing slowness.
+- A TLV protocol would be more compact. But why make it more efficient when the transmissions are literally slow enough to read with your eyes?
+
 
 ---
 

base_station/server.py

@@ -2,13 +2,11 @@ import socket
 import time
 import threading
 
-BROADCAST_IP = "127.0.0.1"
-PORT = 4444
-
-BEACON_INTERVAL = 10  # seconds
 BASE_CALLSIGN = "KI5QKX-10"
 NETWORK_NAME = "HAMNET-HOUSTON"
 
+BEACON_INTERVAL = 10  # seconds
+
 # Fake IP pool
 IP_POOL = [
     "44.127.254.12",
@@ -71,14 +69,14 @@ def handle_request(data, addr, sock):
 def beacon_loop(sock):
     while True:
         beacon = build_beacon().encode('utf-8')
-        sock.sendto(beacon, (BROADCAST_IP, PORT))
+        # Beacon to *broadcast* — here we'll just send to our own callsign for now
+        sock.sendto(beacon, ('CRAPR-0',))
         print(f"Sent beacon: {beacon.decode('utf-8')}")
         time.sleep(BEACON_INTERVAL)
 
 def main():
-    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-    # sock.bind((BROADCAST_IP, PORT))
+    sock = socket.socket(socket.AF_AX25, socket.SOCK_DGRAM)
+    sock.bind((BASE_CALLSIGN,))  # Bind to our station callsign
     
     print(f"Base Station {BASE_CALLSIGN} starting up on {NETWORK_NAME}...")
 

client_node/client.py

@@ -1,9 +1,6 @@
 import socket
 import time
 
-LISTEN_IP = "0.0.0.0"
-PORT = 4444
-
 CLIENT_CALLSIGN = "N0CALL-7"
 
 configured = False
@@ -33,9 +30,8 @@ def apply_network_config(assigned_ip, gateway, dns, lease_time):
 def main():
     global configured, lease_expiration
 
-    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-    sock.bind((LISTEN_IP, PORT))
+    sock = socket.socket(socket.AF_AX25, socket.SOCK_DGRAM)
+    sock.bind((CLIENT_CALLSIGN,))  # Bind to our own callsign
     
     print(f"Client {CLIENT_CALLSIGN} listening for CRAPRNIAC beacons...")
 
@@ -64,7 +60,7 @@ def main():
                 print(f"  Network: {network_name}")
                 print("Sending join request...")
                 request = build_request(network_name).encode('utf-8')
-                sock.sendto(request, addr)
+                sock.sendto(request, (base_callsign,))
         
         elif parts[1] == "CRAP_ACCEPT":
             client_callsign = parts[2]