[23248] Fix DS initialization on "any" if no interfaces are available (backport #5850)

src/cpp/rtps/participant/RTPSParticipantImpl.cpp

@@ -2888,6 +2888,13 @@ bool RTPSParticipantImpl::did_mutation_took_place_on_meta(
             if (locals.empty())
             {
                 IPFinder::getIP4Address(&locals);
+                // If no local interfaces found, use localhost
+                if (locals.empty())
+                {
+                    Locator_t loc_lo;
+                    IPLocator::setIPv4(loc_lo, "127.0.0.1");
+                    locals.push_back(loc_lo);
+                }
             }
 
             // add a locator for each local

test/dds/communication/CMakeLists.txt

@@ -120,6 +120,7 @@ list(APPEND TEST_DEFINITIONS
 
 
 list(APPEND XML_CONFIGURATION_FILES
+    ds_client.xml
     simple_reliable_profile.xml
     simple_besteffort_profile.xml
     simple_reliable_zerocopy_profile.xml

test/dds/communication/ds_client.xml

@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<dds xmlns="http://www.eprosima.com">
+    <profiles>
+        <transport_descriptors>
+            <transport_descriptor>
+                <transport_id>udp_transport</transport_id>
+                <type>UDPv4</type>
+            </transport_descriptor>
+        </transport_descriptors>
+
+        <participant profile_name="Client" is_default_profile="true">
+            <rtps>
+                <useBuiltinTransports>false</useBuiltinTransports>
+                <userTransports>
+                    <transport_id>udp_transport</transport_id>
+                </userTransports>
+                <builtin>
+                    <discovery_config>
+                        <discoveryProtocol>CLIENT</discoveryProtocol>
+                        <discoveryServersList>
+                            <RemoteServer prefix="44.53.00.5f.45.50.52.4f.53.49.4d.41">
+                                <metatrafficUnicastLocatorList>
+                                    <locator>
+                                        <udpv4>
+                                            <address>${SERVER_IP}</address>
+                                            <port>11811</port>
+                                        </udpv4>
+                                    </locator>
+                                </metatrafficUnicastLocatorList>
+                            </RemoteServer>
+                        </discoveryServersList>
+                    </discovery_config>
+
+                    <metatrafficUnicastLocatorList>
+                        <locator>
+                            <udpv4>
+                                <port>17401</port>
+                            </udpv4>
+                        </locator>
+                    </metatrafficUnicastLocatorList>
+                </builtin>
+
+                <defaultUnicastLocatorList>
+                    <locator>
+                        <udpv4>
+                            <port>17400</port>
+                        </udpv4>
+                    </locator>
+                </defaultUnicastLocatorList>
+            </rtps>
+        </participant>
+
+        <data_writer profile_name="simple_publisher_profile" is_default_profile="true">
+            <qos>
+                <reliability>
+                    <kind>RELIABLE</kind>
+                </reliability>
+                <data_sharing>
+                    <kind>OFF</kind>
+                </data_sharing>
+            </qos>
+        </data_writer>
+        <data_reader profile_name="simple_subscriber_profile" is_default_profile="true">
+            <qos>
+                <reliability>
+                    <kind>RELIABLE</kind>
+                </reliability>
+                <data_sharing>
+                    <kind>OFF</kind>
+                </data_sharing>
+            </qos>
+        </data_reader>
+
+    </profiles>
+</dds>

test/dds/communication/dyn_network/CMakeLists.txt

@@ -59,3 +59,11 @@ configure_file(launch_subscriber.bash
 add_test(NAME dds.communication.dynamic_interfaces
          COMMAND ${DOCKER_EXECUTABLE} compose -f ${CMAKE_CURRENT_BINARY_DIR}/dynamic_interfaces.compose.yml up
          WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
+
+configure_file(ds_init_no_interfaces.compose.yml
+         ${CMAKE_CURRENT_BINARY_DIR}/ds_init_no_interfaces.compose.yml @ONLY)
+configure_file(launch_ds_no_interfaces.bash
+         ${CMAKE_CURRENT_BINARY_DIR}/launch_ds_no_interfaces.bash @ONLY)
+add_test(NAME dds.commmunication.ds_init_with_no_interfaces
+         COMMAND ${DOCKER_EXECUTABLE} compose -f ${CMAKE_CURRENT_BINARY_DIR}/ds_init_no_interfaces.compose.yml up --exit-code-from server-pub-sub
+         WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})

test/dds/communication/dyn_network/Dockerfile

@@ -25,3 +25,17 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 # Install apt dependencies
 RUN apt-get update && apt-get install --yes net-tools && rm -rf /var/lib/apt/lists/*
+
+FROM ubuntu:$ubuntu_version AS ubuntu-cli
+
+# Needed for a dependency that forces to set timezone
+ENV TZ=Europe/Madrid
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+# Avoids using interactions during building
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install apt dependencies
+RUN apt-get update && apt-get install --yes python3 python3-pip && rm -rf /var/lib/apt/lists/*
+
+RUN pip3 install psutil

test/dds/communication/dyn_network/ds_init_no_interfaces.compose.yml

@@ -0,0 +1,30 @@
+# Copyright 2025 Proyectos y Sistemas de Mantenimiento SL (eProsima).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+services:
+  server-pub-sub:
+    build: .
+    image: ubuntu-cli:22.04
+    volumes:
+      - @PROJECT_BINARY_DIR@:@PROJECT_BINARY_DIR@
+      - @fastcdr_LIB_DIR@:@fastcdr_LIB_DIR@
+      - @CMAKE_INSTALL_PREFIX@:@CMAKE_INSTALL_PREFIX@
+      @TINYXML2_LIB_DIR_COMPOSE_VOLUME@
+    environment:
+      # Load also fastdds libraries to run the CLI
+      LD_LIBRARY_PATH: @PROJECT_BINARY_DIR@/src/cpp:@fastcdr_LIB_DIR@@TINYXML2_LIB_DIR_COMPOSE_LD_LIBRARY_PATH@:@CMAKE_INSTALL_PREFIX@/lib:$LD_LIBRARY_PATH
+      SERVER_IP: 127.0.0.1
+    working_dir: @PROJECT_BINARY_DIR@/test/dds/communication
+    command: @SHELL_EXECUTABLE@ "dyn_network/launch_ds_no_interfaces.bash"
+    network_mode: none

test/dds/communication/dyn_network/launch_ds_no_interfaces.bash

@@ -0,0 +1,54 @@
+# Copyright 2025 Proyectos y Sistemas de Mantenimiento SL (eProsima).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#!/bin/bash
+
+set -e
+
+PREFIX="@CMAKE_INSTALL_PREFIX@"
+EXAMPLE_DIR="@PROJECT_BINARY_DIR@/test/dds/communication"
+export EXAMPLE_DIR
+
+echo "[INFO] Starting discovery server"
+"$PREFIX/bin/fastdds" discovery -i 0 -l 0.0.0.0 &
+SERVER_PID=$!
+
+
+# Publisher
+echo "[INFO] Starting publisher"
+"$EXAMPLE_DIR/DDSCommunicationPublisher" \
+  --xmlfile "$EXAMPLE_DIR/ds_client.xml" \
+  --wait 1 --samples 10 --loops 1 --seed 0 --magic T &
+PUB_PID=$!
+
+# Subscriber
+echo "[INFO] Starting subscriber"
+"$EXAMPLE_DIR/DDSCommunicationSubscriber" \
+  --xmlfile "$EXAMPLE_DIR/ds_client.xml" \
+  --samples 10 --seed 0 --magic T --rescan 2 &
+SUB_PID=$!
+
+sleep 15
+# Discovery server process must still be running
+if ! kill "$SERVER_PID" 2>/dev/null; then
+    echo "[ERROR] Discover server ended unexpectedly"
+    exit 1
+else
+    echo "[INFO] Manually killing discovery server. Server execution successful"
+fi
+
+# PUBLISHER and SUBSCRIBER processes must end gracefully
+wait $PUB_PID
+wait $SUB_PID
+echo "[INFO] Test completed successfully"