diff --git a/talk/base/asyncpacketsocket.h b/talk/base/asyncpacketsocket.h
index 29ab55f..d9e1bff 100644
--- a/talk/base/asyncpacketsocket.h
+++ b/talk/base/asyncpacketsocket.h
@@ -28,6 +28,7 @@
 #ifndef TALK_BASE_ASYNCPACKETSOCKET_H_
 #define TALK_BASE_ASYNCPACKETSOCKET_H_
 
+#include "talk/base/buffer.h"
 #include "talk/base/dscp.h"
 #include "talk/base/sigslot.h"
 #include "talk/base/socket.h"
@@ -35,6 +36,29 @@
 
 namespace talk_base {
 
+// This structure holds the info needed to update the packet send time header
+// extension, including the information needed to update the authentication tag
+// after changing the value.
+struct PacketTimeUpdateParams {
+  PacketTimeUpdateParams()
+      : rtp_sendtime_extension_id(-1), srtp_auth_tag_len(-1),
+        srtp_packet_index(-1) {
+  }
+
+  int rtp_sendtime_extension_id;  // extension header id present in packet.
+  Buffer srtp_auth_key;           // Authentication key.
+  int srtp_auth_tag_len;          // Authentication tag length.
+  int64 srtp_packet_index;        // Required for Rtp Packet authentication.
+};
+
+// This structure holds meta information for the packet which is about to send
+// over network.
+struct PacketOptions {
+  PacketOptions() : dscp(DSCP_NO_CHANGE) {}
+  DiffServCodePoint dscp;
+  PacketTimeUpdateParams packet_time_params;
+};
+
 // This structure will have the information about when packet is actually
 // received by socket.
 struct PacketTime {