Add network configuration check and report to ros2doctor

ros2doctor/package.xml

@@ -9,7 +9,7 @@
 
   <depend>ros2cli</depend>
 
-  <exec_depend>python3-numpy</exec_depend>
+  <exec_depend>ifcfg_vendor</exec_depend>
   <exec_depend>python3-rosdistro-modules</exec_depend>
 
   <test_depend>ament_copyright</test_depend>

ros2doctor/ros2doctor/api/format.py

@@ -0,0 +1,20 @@
+# Copyright 2019 Open Source Robotics Foundation, Inc.
+#
+# 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.
+
+
+def print_term(k, v):
+    """Print term only if it exists."""
+    if v:
+        # TODO(clairewang): 20 padding needs to be dynamically set
+        print('{:20}: {}'.format(k, v))

ros2doctor/ros2doctor/api/network.py

@@ -0,0 +1,60 @@
+# Copyright 2019 Open Source Robotics Foundation, Inc.
+#
+# 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.
+
+import os
+import sys
+
+import ifcfg
+
+from ros2doctor.api.format import print_term
+
+
+def _is_unix_like_platform():
+    """Return True if conforms to UNIX/POSIX-style APIs."""
+    return os.name == 'posix'
+
+
+def check_network_config_helper():
+    """Check if loopback and multicast IP addresses are found."""
+    has_loopback, has_non_loopback, has_multicast = False, False, False
+    for name, iface in ifcfg.interfaces().items():
+        flags = iface.get('flags')
+        if 'LOOPBACK' in flags:
+            has_loopback = True
+        else:
+            has_non_loopback = True
+        if 'MULTICAST' in flags:
+            has_multicast = True
+    return has_loopback, has_non_loopback, has_multicast
+
+
+def check_network_config():
+    """Conduct network checks and output error/warning messages."""
+    has_loopback, has_non_loopback, has_multicast = check_network_config_helper()
+    if not has_loopback:
+        sys.stderr.write('ERROR: No loopback IP address is found.\n')
+    if not has_non_loopback:
+        sys.stderr.write('WARNING: Only loopback IP address is found.\n')
+    if not has_multicast:
+        sys.stderr.write('WARNING: No multicast IP address is found.\n')
+    return has_loopback and has_non_loopback and has_multicast
+
+
+def print_network():
+    """Print all system and ROS network information."""
+    print('NETWORK CONFIGURATION')
+    for name, iface in ifcfg.interfaces().items():
+        for k, v in iface.items():
+            print_term(k, v)
+    print('\n')

ros2doctor/ros2doctor/api/platform.py

@@ -16,6 +16,8 @@
 import platform
 import sys
 
+from ros2doctor.api.format import print_term
+
 import rosdistro
 
 
@@ -24,37 +26,38 @@ def print_platform_info():
     platform_name = platform.system()
     # platform info
     print('PLATFORM INFORMATION')
-    print('system               : ', platform_name)
-    print('Platform Info        : ', platform.platform())
+    print_term('system', platform_name)
+    print_term('platform info', platform.platform())
     if platform_name == 'Darwin':
-        print('Mac OS version       : ', platform.mac_ver())
-    print('release              : ', platform.release())
-    print('processor            : ', platform.processor())
+        print_term('mac OS version', platform.mac_ver())
+    print_term('release', platform.release())
+    print_term('processor', platform.processor())
 
     # python info
     print('PYTHON INFORMATION')
-    print('version              : ', platform.python_version())
-    print('compiler             : ', platform.python_compiler())
-    print('build                : ', platform.python_build())
+    print_term('version', platform.python_version())
+    print_term('compiler', platform.python_compiler())
+    print_term('build', platform.python_build())
+    print('\n')
 
 
 def check_platform_helper():
     """Check ROS_DISTRO related environment variables and distribution name."""
     distro_name = os.environ.get('ROS_DISTRO')
     if not distro_name:
-        sys.stderr.write('WARNING: ROS_DISTRO is not set.')
+        sys.stderr.write('WARNING: ROS_DISTRO is not set.\n')
         return
     else:
         distro_name = distro_name.lower()
     u = rosdistro.get_index_url()
     if not u:
-        sys.stderr.write('WARNING: Unable to access ROSDISTRO_INDEX_URL\
-            or DEFAULT_INDEX_URL.')
+        sys.stderr.write('WARNING: Unable to access ROSDISTRO_INDEX_URL '
+                         'or DEFAULT_INDEX_URL.\n')
         return
     i = rosdistro.get_index(u)
     distro_info = i.distributions.get(distro_name)
     if not distro_info:
-        sys.stderr.write("WARNING: Distribution name '%s' is not found" % distro_name)
+        sys.stderr.write("WARNING: Distribution name '%s' is not found\n" % distro_name)
         return
     distro_data = rosdistro.get_distribution(i, distro_name).get_data()
     return distro_name, distro_info, distro_data
@@ -68,10 +71,11 @@ def print_ros2_info():
     distro_name, distro_info, distro_data = distros
 
     print('ROS INFORMATION')
-    print('distribution name    : ', distro_name)
-    print('distribution type    : ', distro_info.get('distribution_type'))
-    print('distribution status  : ', distro_info.get('distribution_status'))
-    print('release platforms    : ', distro_data.get('release_platforms'))
+    print_term('distribution name', distro_name)
+    print_term('distribution type', distro_info.get('distribution_type'))
+    print_term('distribution status', distro_info.get('distribution_status'))
+    print_term('release platforms', distro_data.get('release_platforms'))
+    print('\n')
 
 
 def check_platform():
@@ -84,15 +88,13 @@ def check_platform():
 
     # check distro status
     if distro_info.get('distribution_status') == 'prerelease':
-        sys.stderr.write('WARNING: Distribution is not fully supported or tested.\
-            To get more stable features,\
-                Download a stable version at\
-                    https://index.ros.org/doc/ros2/Installation/')
+        sys.stderr.write('WARNING: Distribution is not fully supported or tested. '
+                         'To get more stable features, download a stable version at '
+                         'https://index.ros.org/doc/ros2/Installation/\n')
     elif distro_info.get('distribution_status') == 'end-of-life':
-        sys.stderr.write('WARNING: Distribution is no longer supported or deprecated.\
-            To get the latest features,\
-                Download the latest version at\
-                    https://index.ros.org/doc/ros2/Installation/')
+        sys.stderr.write('WARNING: Distribution is no longer supported or deprecated. '
+                         'To get the latest features, download the latest version at '
+                         'https://index.ros.org/doc/ros2/Installation/')
     else:
         passed = True
     return passed

ros2doctor/ros2doctor/command/doctor.py

@@ -41,6 +41,6 @@ def main(self, *, parser, args):
 
 
 class WtfCommand(DoctorCommand):
-    """Add `wtf` as alias to `doctor`."""
+    """Use `wtf` as alias to `doctor`."""
 
     pass

ros2doctor/setup.py

@@ -32,10 +32,12 @@
         ],
         'ros2doctor.checks': [
             'check_platform = ros2doctor.api.platform:check_platform',
+            'check_network_config = ros2doctor.api.network:check_network_config',
         ],
         'ros2doctor.report': [
             'report_platform = ros2doctor.api.platform:print_platform_info',
             'report_ros_distro = ros2doctor.api.platform:print_ros2_info',
+            'report_network_config = ros2doctor.api.network:print_network',
         ],
     }
 )