Allow interface roaming. Currently only tested with static/udp configuration

3 files changed, 37 insertions, 0 deletions

diff --git a/main/openvpn/src/openvpn/init.c b/main/openvpn/src/openvpn/init.c
index c39646de..a866b7d6 100644
--- a/main/openvpn/src/openvpn/init.c
+++ b/main/openvpn/src/openvpn/init.c
@@ -3209,6 +3209,20 @@ management_show_net_callback (void *arg, const int msglevel)
 #endif
 }
 
+#ifdef TARGET_ANDROID
+int
+managmenet_callback_network_change (void *arg)
+{
+  struct context *c = (struct context *) arg;
+  if (!c->c2.link_socket)
+    return -1;
+  if (c->c2.link_socket->sd == SOCKET_UNDEFINED)
+    return -1;
+
+  return c->c2.link_socket->sd;
+}
+#endif
+
 #endif
 
 void
@@ -3224,6 +3238,9 @@ init_management_callback_p2p (struct context *c)
       cb.show_net = management_show_net_callback;
       cb.proxy_cmd = management_callback_proxy_cmd;
       cb.remote_cmd = management_callback_remote_cmd;
+#ifdef TARGET_ANDROID
+      cb.network_change = managmenet_callback_network_change;
+#endif
       management_set_callback (management, &cb);
     }
 #endif
diff --git a/main/openvpn/src/openvpn/manage.c b/main/openvpn/src/openvpn/manage.c
index 561c252b..855ed042 100644
--- a/main/openvpn/src/openvpn/manage.c
+++ b/main/openvpn/src/openvpn/manage.c
@@ -1105,6 +1105,19 @@ man_remote (struct management *man, const char **p)
     }
 }
 
+#ifdef TARGET_ANDROID
+static void
+man_network_change (struct management *man)
+{
+  if (man->persist.callback.network_change)
+    {
+      int fd = (*man->persist.callback.network_change)(man->persist.callback.arg);
+      man->connection.fdtosend = fd;
+        msg (M_CLIENT, "PROTECTFD: fd '%d' sent to be protected", fd);
+    }
+}
+#endif
+
 static void
 man_dispatch_command (struct management *man, struct status_output *so, const char **p, const int nparms)
 {
@@ -1148,6 +1161,10 @@ man_dispatch_command (struct management *man, struct status_output *so, const ch
       if (man_need (man, p, 1, 0))
 	man_signal (man, p[1]);
     }
+  else if (streq (p[0], "network-change"))
+    {
+        man_network_change(man);
+    }
   else if (streq (p[0], "load-stats"))
     {
       man_load_stats (man);
diff --git a/main/openvpn/src/openvpn/manage.h b/main/openvpn/src/openvpn/manage.h
index 1c8dda69..c48875c7 100644
--- a/main/openvpn/src/openvpn/manage.h
+++ b/main/openvpn/src/openvpn/manage.h
@@ -173,6 +173,9 @@ struct management_callback
 #endif
   bool (*proxy_cmd) (void *arg, const char **p);
   bool (*remote_cmd) (void *arg, const char **p);
+#ifdef TARGET_ANDROID
+  int (*network_change) (void *arg);
+#endif
 };
 
 /*