Added a handler that writes inbound plain text packets to the TUN device

diff --git a/src/frontends/android/jni/libandroidbridge/backend/android_service.c b/src/frontends/android/jni/libandroidbridge/backend/android_service.c
index bd28e7d..417a8aa 100644 (file)
--- a/src/frontends/android/jni/libandroidbridge/backend/android_service.c
+++ b/src/frontends/android/jni/libandroidbridge/backend/android_service.c
@@ -15,6 +15,8 @@
  * for more details.
  */
 
+#include <unistd.h>
+
 #include "android_service.h"
 #include "../charonservice.h"
 #include "../vpnservice_builder.h"
@@ -80,6 +82,35 @@ static void send_esp(void *data, esp_packet_t *packet)
 }
 
 /**
+ * Inbound callback
+ */
+static void deliver_plain(private_android_service_t *this,
+                                                 ip_packet_t *packet)
+{
+       chunk_t encoding;
+       ssize_t len;
+
+       encoding = packet->get_encoding(packet);
+
+       this->lock->read_lock(this->lock);
+       if (this->tunfd < 0)
+       {       /* the TUN device is already closed */
+               this->lock->unlock(this->lock);
+               packet->destroy(packet);
+               return;
+       }
+       len = write(this->tunfd, encoding.ptr, encoding.len);
+       this->lock->unlock(this->lock);
+
+       if (len < 0 || len != encoding.len)
+       {
+               DBG1(DBG_DMN, "failed to write packet to TUN device: %s",
+                        strerror(errno));
+       }
+       packet->destroy(packet);
+}
+
+/**
  * Receiver callback
  */
 static void receiver_esp_cb(void *data, packet_t *packet)
@@ -179,6 +210,8 @@ static bool setup_tun_device(private_android_service_t *this,
 
        charon->receiver->add_esp_cb(charon->receiver,
                                                                (receiver_esp_cb_t)receiver_esp_cb, NULL);
+       ipsec->processor->register_inbound(ipsec->processor,
+                                                                         (ipsec_inbound_cb_t)deliver_plain, this);
        ipsec->processor->register_outbound(ipsec->processor,
                                                                           (ipsec_outbound_cb_t)send_esp, NULL);
 
@@ -204,6 +237,8 @@ static void close_tun_device(private_android_service_t *this)
 
        ipsec->processor->unregister_outbound(ipsec->processor,
                                                                                 (ipsec_outbound_cb_t)send_esp);
+       ipsec->processor->unregister_inbound(ipsec->processor,
+                                                                               (ipsec_inbound_cb_t)deliver_plain);
        charon->receiver->del_esp_cb(charon->receiver,
                                                                (receiver_esp_cb_t)receiver_esp_cb);
        close(tunfd);