[dua] completely remove DUA features and configurations (openthread#13191)

This commit removes the OPENTHREAD_CONFIG_TMF_PROXY_DUA_ENABLE feature
and all associated code, tests, CLI commands, and harness references.

Changes:
- Removed OPENTHREAD_CONFIG_TMF_PROXY_DUA_ENABLE definition and all
  assert/preprocessor checks.
- Completely deleted dua_manager.cpp and dua_manager.hpp.
- Removed DUA registration notifying and request URI paths.
- Cleaned up all references to Domain Unicast Address (DUA) across
  child management, notifier, time ticker, and MLE.
- Removed DUA commands and logic from the CLI and Python cert tests
  (including packet verifier).
- Verified that the entire codebase compiles clean and all tests
  successfully pass using the Nexus test suite.

Author: jwhui

.github/workflows/otci.yml

@@ -80,7 +80,7 @@ jobs:
         PYTHONPATH=./tests/scripts/thread-cert pytype tools/otci
     - name: Build
       run: |
-        ./script/cmake-build simulation -DOT_THREAD_VERSION=1.4 -DOT_DUA=ON -DOT_MLR=ON -DOT_BACKBONE_ROUTER=ON \
+        ./script/cmake-build simulation -DOT_THREAD_VERSION=1.4 -DOT_MLR=ON -DOT_BACKBONE_ROUTER=ON \
         -DOT_CSL_RECEIVER=ON -DOT_SIMULATION_VIRTUAL_TIME=${VIRTUAL_TIME}
     - name: Install OTCI Python Library
       run: |

script/test

@@ -350,7 +350,6 @@ do_build_otbr_docker()
         "-DOT_SRP_CLIENT=ON"
         "-DOT_FULL_LOGS=ON"
         "-DOT_UPTIME=ON"
-        "-DOTBR_DUA_ROUTING=ON"
         "-DOTBR_DHCP6_PD=ON"
     )
     local args=(

src/cli/README.md

@@ -50,7 +50,6 @@ Done
 - [discover](#discover-channel)
 - [dns](#dns-config)
 - [domainname](#domainname)
-- [dua](#dua-iid)
 - [eidcache](#eidcache)
 - [eui64](#eui64)
 - [extaddr](#extaddr)
@@ -174,30 +173,6 @@ BBR Primary: None
 Done
 ```
 
-### bbr mgmt dua \<status\|coap-code\> [meshLocalIid]
-
-Configure the response status for DUA.req with meshLocalIid in payload. Without meshLocalIid, simply respond any coming DUA.req next with the specified status or COAP code.
-
-Only for testing/reference device.
-
-known status value:
-
-- 0: ST_DUA_SUCCESS
-- 1: ST_DUA_REREGISTER
-- 2: ST_DUA_INVALID
-- 3: ST_DUA_DUPLICATE
-- 4: ST_DUA_NO_RESOURCES
-- 5: ST_DUA_BBR_NOT_PRIMARY
-- 6: ST_DUA_GENERAL_FAILURE
-- 160: COAP code 5.00
-
-```bash
-> bbr mgmt dua 1 2f7c235e5025a2fd
-Done
-> bbr mgmt dua 160
-Done
-```
-
 ### bbr mgmt mlr listener
 
 Show the Multicast Listeners.
@@ -1959,34 +1934,6 @@ Set the Thread Domain Name for Thread 1.2 device.
 Done
 ```
 
-### dua iid
-
-Get the Interface Identifier manually specified for Thread Domain Unicast Address on Thread 1.2 device.
-
-```bash
-> dua iid
-0004000300020001
-Done
-```
-
-### dua iid \<iid\>
-
-Set the Interface Identifier manually specified for Thread Domain Unicast Address on Thread 1.2 device.
-
-```bash
-> dua iid 0004000300020001
-Done
-```
-
-### dua iid clear
-
-Clear the Interface Identifier manually specified for Thread Domain Unicast Address on Thread 1.2 device.
-
-```bash
-> dua iid clear
-Done
-```
-
 ### eidcache
 
 Print the EID-to-RLOC cache entries.

src/core/BUILD.gn

@@ -690,8 +690,6 @@ openthread_core_files = [
   "thread/csl_tx_scheduler.hpp",
   "thread/discover_scanner.cpp",
   "thread/discover_scanner.hpp",
-  "thread/dua_manager.cpp",
-  "thread/dua_manager.hpp",
   "thread/energy_scan_server.cpp",
   "thread/energy_scan_server.hpp",
   "thread/indirect_sender.cpp",

src/core/CMakeLists.txt

@@ -237,7 +237,6 @@ set(COMMON_SOURCES
     thread/child_table.cpp
     thread/csl_tx_scheduler.cpp
     thread/discover_scanner.cpp
-    thread/dua_manager.cpp
     thread/energy_scan_server.cpp
     thread/indirect_sender.cpp
     thread/key_manager.cpp

src/core/backbone_router/bbr_leader.cpp

@@ -208,10 +208,6 @@ void Leader::UpdateBackboneRouterPrimary(void)
     Get<Mlr::Manager>().HandleBackboneRouterPrimaryUpdate(event);
 #endif
 
-#if OPENTHREAD_FTD && OPENTHREAD_CONFIG_TMF_PROXY_DUA_ENABLE
-    Get<DuaManager>().HandleBackboneRouterPrimaryUpdate(event);
-#endif
-
 exit:
     OT_UNUSED_VARIABLE(event);
 }
@@ -253,10 +249,6 @@ void Leader::UpdateDomainPrefixConfig(void)
     Get<Local>().HandleDomainPrefixUpdate(event);
 #endif
 
-#if OPENTHREAD_FTD && OPENTHREAD_CONFIG_TMF_PROXY_DUA_ENABLE
-    Get<DuaManager>().HandleDomainPrefixUpdate(event);
-#endif
-
 exit:
     OT_UNUSED_VARIABLE(event);
 }

src/core/backbone_router/bbr_manager.hpp

@@ -47,7 +47,6 @@
 #include "common/locator.hpp"
 #include "common/non_copyable.hpp"
 #include "net/netif.hpp"
-#include "thread/dua_manager.hpp"
 #include "thread/mlr_types.hpp"
 #include "thread/network_data.hpp"
 #include "thread/tmf.hpp"

src/core/common/notifier.cpp

@@ -143,9 +143,6 @@ void Notifier::EmitEvents(void)
 #if OPENTHREAD_CONFIG_MLR_ENABLE || (OPENTHREAD_FTD && OPENTHREAD_CONFIG_TMF_PROXY_MLR_ENABLE)
     Get<Mlr::Manager>().HandleNotifierEvents(events);
 #endif
-#if OPENTHREAD_FTD && OPENTHREAD_CONFIG_TMF_PROXY_DUA_ENABLE
-    Get<DuaManager>().HandleNotifierEvents(events);
-#endif
 #if OPENTHREAD_CONFIG_RADIO_LINK_TREL_ENABLE
     Get<Trel::Link>().HandleNotifierEvents(events);
 #endif

src/core/common/time_ticker.cpp

@@ -104,13 +104,6 @@ void TimeTicker::HandleTimer(void)
     }
 #endif
 
-#if OPENTHREAD_FTD && OPENTHREAD_CONFIG_TMF_PROXY_DUA_ENABLE
-    if (mReceivers & Mask(kDuaManager))
-    {
-        Get<DuaManager>().HandleTimeTick();
-    }
-#endif
-
     if (mReceivers & Mask(kIp6Mpl))
     {
         Get<Ip6::Mpl>().HandleTimeTick();

src/core/common/time_ticker.hpp

@@ -66,7 +66,6 @@ class TimeTicker : public InstanceLocator, private NonCopyable
         kAddressResolver,        ///< `AddressResolver`
         kChildSupervisor,        ///< `ChildSupervisor`
         kIp6FragmentReassembler, ///< `Ip6::Ip6` (handling of fragmented messages)
-        kDuaManager,             ///< `DuaManager`
         kNetworkDataNotifier,    ///< `NetworkData::Notifier`
         kIp6Mpl,                 ///< `Ip6::Mpl`
         kBbrLocal,               ///< `BackboneRouter::Local`