add network to guest to make it accessible via IP (#239)

* add network card with dhcp ip

README.md

@@ -243,10 +243,11 @@ TD, PID: 111924, SSH : ssh -p 10022 root@localhost
         ```console
         Id   Name                                                        State
         ---------------------------------------------------------------------------
-        1    tdvirsh-trust_domain-f7210c2b-2657-4f30-adf3-639b573ea39f   running (ssh:32855, cid:3)
+        1    tdvirsh-trust_domain-f7210c2b-2657-4f30-adf3-639b573ea39f   running (ip:192.168.122.212, hostfwd:32855, cid:3)
         ```
 
-        NOTE: `32855` in `ssh:32855` is the port number a user can use to connect to the TD via `ssh`.
+        NOTE: `32855` in `hostfwd:32855` is the port number a user can use to connect to the TD via `ssh -p 32855 root@localhost`.
+              You can also connect to the guest using its IP address : `ssh [email protected]`.
 
    * A TD can be removed with the following command:
 

guest-tools/regular_vm.xml.template

@@ -36,6 +36,11 @@
       </backingStore>
       <target dev="vda" bus="virtio"/>
     </disk>
+    <interface type='network'>
+      <source network='default'/>
+      <model type='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
+    </interface>
     <console type='pty'>
       <target type='virtio' port='1'/>
     </console>

guest-tools/tdvirsh

@@ -172,7 +172,16 @@ print_all() {
                     --hmp info qtree 2>&1 |
                     awk '/guest-cid/ {print $3}'
                      )
-            extra_info="(ssh:$host_port, cid:${guest_cid})"
+            host_ip=$(
+               virsh domifaddr ${td_domain} 2>&1 |
+                    awk '/vnet/ {print $4}'
+                     )
+            if [[ "${host_ip}" != */* ]]; then
+                host_ip="unknown"
+            else
+                host_ip="${host_ip%/*}"
+            fi
+            extra_info="(ip:${host_ip}, hostfwd:$host_port, cid:${guest_cid})"
         fi
         echo "$line $extra_info"
     done < <(virsh "list --all")

guest-tools/trust_domain-sb.xml.template

@@ -40,6 +40,11 @@
       </backingStore>
       <target dev="vda" bus="virtio"/>
     </disk>
+    <interface type='network'>
+      <source network='default'/>
+      <model type='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
+    </interface>
     <console type='pty'>
       <target type='virtio' port='1'/>
     </console>

guest-tools/trust_domain.xml.template

@@ -40,6 +40,11 @@
       </backingStore>
       <target dev="vda" bus="virtio"/>
     </disk>
+    <interface type='network'>
+      <source network='default'/>
+      <model type='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
+    </interface>
     <console type='pty'>
       <target type='virtio' port='1'/>
     </console>