Apply CI workaround and re-enable ping tests.

Ref actions/runner-images#11614

.github/workflows/main.yml

@@ -63,6 +63,13 @@ jobs:
         run: |
           sudo apt update
           sudo apt install -y libxml2-dev libxslt-dev
+      - name: Enable unprivileged ping sockets
+        # actions/runner-images#11614
+        if: matrix.platform == 'ubuntu-latest'
+        shell: bash
+        run: |
+          echo 'net.ipv4.ping_group_range = 0 2147483647' | sudo tee -a /etc/sysctl.conf
+          sudo sysctl -p
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
@@ -85,6 +92,13 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - name: Enable unprivileged ping sockets
+        # actions/runner-images#11614
+        if: matrix.platform == 'ubuntu-latest'
+        shell: bash
+        run: |
+          echo 'net.ipv4.ping_group_range = 0 2147483647' | sudo tee -a /etc/sysctl.conf
+          sudo sysctl -p
       - name: Setup Python
         uses: actions/setup-python@v4
         with:

conftest.py

@@ -26,21 +26,6 @@ def old_ping_exception():
     return sys.version_info < (3, 10)
 
 
-def broken_actions_runner():
-    """
-    Is unprivileged ICMP unavailable?
-
-    Since Dec 2024, GitHub Actions runners no longer seem
-    to be able to allow unprivileged ICMP.
-
-    actions/runner-images#11614
-    """
-    return bool(os.environ.get('GITHUB_ACTIONS')) and (
-        # Unfortunately, `os.environ['RUNNER_OS']` doesn't work
-        platform.system() == 'Linux'
-    )
-
-
 collect_ignore = (
     [
         'jaraco/net/devices/linux.py',
@@ -55,7 +40,7 @@ def broken_actions_runner():
     + [
         'jaraco/net/icmp.py',
     ]
-    * (old_ping_exception() or broken_actions_runner())
+    * old_ping_exception()
 )