Userland support for VM interconnection

Change-Id: I699608f3072b39c8da1a7cc313bd0b736e90f225

rootdir/etc/init.goldfish.sh

@@ -45,3 +45,13 @@ esac
 # this line doesn't really do anything useful. however without it the
 # previous setprop doesn't seem to apply for some really odd reason
 setprop ro.qemu.init.completed 1
+
+# set up the second interface (for inter-emulator connections)
+# if required
+my_ip=`getprop net.shared_net_ip`
+case "$my_ip" in
+    "")
+    ;;
+    *) ifconfig eth1 "$my_ip" netmask 255.255.255.0 up
+    ;;
+esac

toolbox/route.c

@@ -80,7 +80,8 @@ int route_main(int argc, char *argv[])
 
         /* route add -net 192.168.1.2 netmask 255.255.255.0 gw 192.168.1.1 */
         if (argc > 7 && !strcmp(argv[2], "-net") &&
-            !strcmp(argv[4], "netmask") && !strcmp(argv[6], "gw")) {
+                !strcmp(argv[4], "netmask")) {
+            if (!strcmp(argv[6], "gw")) {
                 rt.rt_flags = RTF_UP | RTF_GATEWAY;
                 if (set_address(argv[3], &rt.rt_dst) &&
                     set_address(argv[5], &rt.rt_genmask) &&
@@ -88,6 +89,15 @@ int route_main(int argc, char *argv[])
                     errno = 0;
                 }
                 goto apply;
+            } else if (!strcmp(argv[6], "dev")) {
+                rt.rt_flags = RTF_UP;
+                rt.rt_dev = argv[7];
+                if (set_address(argv[3], &rt.rt_dst) &&
+                    set_address(argv[5], &rt.rt_genmask)) {
+                    errno = 0;
+                }
+                goto apply;
+            }
         }
     }