Increase FBP hop limit to 20

docs/hdstack.md

@@ -116,9 +116,9 @@ worker 5 -> 54400..54499
 The generated ranges must fit within the UDP port range and must not collide
 with configured bridge, external OpenBridge or reporting ports.
 
-The internal worker path consumes one additional FBP hop. FreeDMR therefore
-accepts a maximum of 11 FBP hops before discarding traffic; this ceiling applies
-to all FBP relationships rather than being a special HDStack exception.
+The internal worker path consumes one additional FBP hop. FreeDMR accepts a
+maximum of 20 FBP hops before discarding traffic; this ceiling applies to all
+FBP relationships rather than being a special HDStack exception.
 
 Workers connect to the aggregator over generated loopback FBP v5 links with
 FBCP enabled. FBP v5 preserves origin metadata and carries unit data as well as

docs/release-notes-v1.5.0.md

@@ -77,8 +77,8 @@ backing up the surrounding FreeDMR configuration.
 ## Compatibility
 
 FBP v5 and OBP v1 remain distinct supported peer protocols. The HDStack
-internal topology uses FBP v5/FBCP and consumes one additional FBP hop; the
-accepted maximum is therefore 11 hops for all FBP relationships.
+internal topology uses FBP v5/FBCP and consumes one additional FBP hop. The
+accepted maximum is 20 hops for all FBP relationships.
 
 The tagged container build publishes `latest`, the tag-specific
 `v1.5.0-with-proxy` image and `development-latest` through the existing release

hblink.py

@@ -52,7 +52,7 @@ import pickle
 from reporting_const import *
 
 MAX_OPTIONS_LENGTH = 255
-MAX_FBP_HOPS = 11
+MAX_FBP_HOPS = 20
 
 # The module needs logging logging, but handlers, etc. are controlled by the parent
 import logging

tests/test_udp_blackbox_harness.py

@@ -1571,7 +1571,7 @@ class UdpBlackBoxHarnessTest(unittest.TestCase):
         self.assertEqual(quench.packet[4:7], bytes_3(91))
         self.assertEqual(quench.packet[7:11], bytes_4(stream_id))
 
-    def test_fbp_eleven_hops_is_accepted(self):
+    def test_fbp_twenty_hops_is_accepted(self):
         require_udp_integration_enabled()
 
         stream_id = 0x01020310
@@ -1593,7 +1593,7 @@ class UdpBlackBoxHarnessTest(unittest.TestCase):
                     ),
                     source_server=9991,
                     source_rptr=1001,
-                    hops=10,
+                    hops=19,
                 )
                 captured = master_b.recv(timeout=2.0)
             finally:
@@ -1624,7 +1624,7 @@ class UdpBlackBoxHarnessTest(unittest.TestCase):
                     ),
                     source_server=9991,
                     source_rptr=1001,
-                    hops=11,
+                    hops=20,
                 )
                 quench = fbp_peer.recv_opcode(b"BCSQ", timeout=2.0)
                 with self.assertRaises(socket.timeout):