onfigure_warp_doh_and_exclude_ipv6

actions/prepare/action.yml

@@ -123,11 +123,26 @@ runs:
         echo 'spalloc_port = 22244' >> ~/.${{ inputs.cfg_file }}.cfg
         echo 'version = 5' >> ~/.${{ inputs.cfg_file }}.cfg
 
-    - name: Run prefer IPv4 script
+    - name: install_warp_on_debian
       shell: bash
       if: runner.os == 'Linux'
       run: |
         curl -fsSL https://pkg.cloudflareclient.com/pubkey.gpg | sudo gpg --yes --dearmor --output /usr/share/keyrings/cloudflare-warp-archive-keyring.gpg
         echo "deb [arch=amd64 signed-by=/usr/share/keyrings/cloudflare-warp-archive-keyring.gpg] https://pkg.cloudflareclient.com/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/cloudflare-client.list
         sudo apt-get update
         sudo apt-get install -y cloudflare-warp
+
+    - name: configure_warp_doh_and_exclude_ipv6
+      shell: bash
+      if: runner.os == 'Linux'
+      run: |
+        echo 'Beginning configuration of the Cloudflare WARP client with DNS-over-HTTPS and IPv6 exclusion...'
+        echo 'Initiating client registration with Cloudflare...'
+        warp-cli --accept-tos registration new
+        echo 'Configuring WARP to operate in DNS-over-HTTPS mode (warp+doh)...'
+        warp-cli --accept-tos mode warp+doh
+        echo 'Excluding IPv6 traffic from WARP by configuring it as a split tunnel...'
+        warp-cli --accept-tos add-excluded-route '::/0' # Exclude IPv6, forcing IPv4 resolution
+        # `tunnel ip add` does not work with IP ranges, see https://community.cloudflare.com/t/cant-cidr-for-split-tunnling/630834
+        echo 'Establishing WARP connection...'
+        warp-cli --accept-tos connect