Configure network via VM configuration file. Fixes #478 #418

README.md

@@ -603,12 +603,30 @@ In the example above:
 -   Port 8123 on the host is forwarded to port 8123 on the guest.
 -   Port 8888 on the host is forwarded to port 80 on the guest.
 
+# Disable networking
+
+To completely disable all network interfaces in a guest VM add this additional
+line to your virtual machine configuration:
+
+-   `network="none"`
+
+# Restricted networking
+
+You can isolate the guest from the host (and broader network) using the restrict
+option, which will restrict networking to just the guest and any virtual devices.
+
+This can be used to prevent software running inside the guest from phoning home
+while still providing a network inside the guest. Add this additional line to
+your virtual machine configuration:
+
+-   `network="restrict"`
+
 # Bridged networking
 
 Connect your virtual machine to a preconfigured network bridge. Add an
 additional line to your virtual machine configuration
 
--   `bridge="br0"`
+-   `network="br0"`
 
 # USB redirection
 

quickemu

@@ -992,11 +992,26 @@ function vm_boot() {
     echo "WARNING! Unknown mouse value: '${MOUSE}; Fallback to ps2'"
   fi
 
+  # $bridge backwards compatibility for Quickemu <= 4.0
   if [ -n "${bridge}" ]; then
-    # Enable bridge mode networking
+    network="${bridge}"
+  fi
+
+  if [ "${network}" == "none" ]; then
+    # Disbale all networking
+    echo " - Network:  Disabled"
+    args+=(-nic none)
+  elif [ "${network}" == "restrict" ]; then
+    echo " - Network:  Restricted (${NET_DEVICE})"
     # shellcheck disable=SC2054,SC2206
-    args+=(-nic bridge,br=${bridge},model=virtio-net-pci)
+    args+=(-device ${NET_DEVICE},netdev=nic -netdev ${NET},restrict=y,id=nic)
+  elif [ -n "${network}" ]; then
+    # Enable bridge mode networking
+    echo " - Network:  Bridged (${network})"
+    # shellcheck disable=SC2054,SC2206
+    args+=(-nic bridge,br=${network},model=virtio-net-pci)
   else
+    echo " - Network:  User (${NET_DEVICE})"
     # shellcheck disable=SC2054,SC2206
     args+=(-device ${NET_DEVICE},netdev=nic -netdev ${NET},id=nic)
   fi
@@ -1394,7 +1409,6 @@ function monitor_send_cmd {
 
 # Lowercase variables are used in the VM config file only
 boot="efi"
-bridge=""
 cpu_cores=""
 disk_img=""
 disk_size=""
@@ -1405,6 +1419,7 @@ guest_os="linux"
 img=""
 iso=""
 macos_release=""
+network=""
 port_forwards=()
 preallocation="off"
 ram=""