diff --git a/src/client.rs b/src/client.rs
index 7f4d1271d..23d61a953 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -6,7 +6,7 @@ use alloc::vec::Vec;
 use coap_lite::{
     block_handler::{extending_splice, BlockValue},
     error::HandlingError,
-    CoapOption, CoapRequest, CoapResponse, MessageClass, MessageType, ObserveOption, Packet,
+    CoapOption, CoapRequest, CoapResponse, MessageClass, MessageType, ObserveOption, Packet as Message,
     RequestType as Method, ResponseType as Status,
 };
 use core::mem;
@@ -37,6 +37,12 @@ use tokio::{
 use url::Url;
 const DEFAULT_RECEIVE_TIMEOUT_SECONDS: u64 = 2; // 2s
 
+#[derive(Debug, Clone)]
+pub struct Packet {
+    pub address: Option<SocketAddr>,
+    pub message: Message,
+}
+
 #[derive(Debug)]
 pub enum ObserveMessage {
     Terminate,
@@ -49,7 +55,7 @@ use async_trait::async_trait;
 /// timeouts and retries do not need to be implemented by the transport
 /// if confirmable messages are sent
 pub trait ClientTransport: Send + Sync {
-    async fn recv(&self, buf: &mut [u8]) -> std::io::Result<usize>;
+    async fn recv(&self, buf: &mut [u8]) -> std::io::Result<(usize, Option<SocketAddr>)>;
     async fn send(&self, buf: &[u8]) -> std::io::Result<usize>;
 }
 
@@ -60,9 +66,11 @@ trait TransportExt {
 impl<T: ClientTransport> TransportExt for T {
     async fn receive_packet(&self) -> IoResult<Option<Packet>> {
         let mut buf = [0; 1500];
-        let nread = self.recv(&mut buf).await?;
-        let parse_opt = Packet::from_bytes(&buf[..nread]).ok();
-        return Ok(parse_opt);
+        let (nread, address) = self.recv(&mut buf).await?;
+        return match Message::from_bytes(&buf[..nread]).ok() {
+            Some(message) => Ok(Some(Packet {address, message})),
+            None => Ok(None),
+        }
     }
 }
 
@@ -163,16 +171,16 @@ async fn receive_loop<T: ClientTransport + 'static>(
             transport_instance.send(&ack).await?;
         }
 
-        let MessageClass::Response(_) = packet.header.code else {
+        let MessageClass::Response(_) = packet.message.header.code else {
             continue;
         };
 
-        let token = packet.get_token();
+        let token = packet.message.get_token();
         let Some(sender) = transport_sync.get_sender(token).await else {
             info!("received unexpected response for token {:?}", &token);
             continue;
         };
-        match packet.header.code {
+        match packet.message.header.code {
             MessageClass::Response(_) => {}
             m => {
                 debug!("unknown message type {}", m);
@@ -191,16 +199,16 @@ async fn receive_loop<T: ClientTransport + 'static>(
 }
 
 pub fn parse_for_ack(packet: &Packet) -> Option<Vec<u8>> {
-    match (packet.header.get_type(), packet.header.code) {
+    match (packet.message.header.get_type(), packet.message.header.code) {
         (MessageType::Confirmable, MessageClass::Response(_)) => Some(make_ack(packet)),
         _ => None,
     }
 }
 
 pub fn make_ack(packet: &Packet) -> Vec<u8> {
-    let mut ack = Packet::new();
+    let mut ack = Message::new();
     ack.header.set_type(MessageType::Acknowledgement);
-    ack.header.message_id = packet.header.message_id;
+    ack.header.message_id = packet.message.header.message_id;
     ack.header.code = MessageClass::Empty;
     return ack.to_bytes().unwrap();
 }
@@ -226,9 +234,9 @@ impl<T: ClientTransport> Clone for CoapClientTransport<T> {
 
 impl<T: ClientTransport> CoapClientTransport<T> {
     pub const DEFAULT_NUM_RETRIES: usize = 5;
-    async fn establish_receiver_for(&self, msg: &Packet) -> UnboundedReceiver<IoResult<Packet>> {
+    async fn establish_receiver_for(&self, packet: &Packet) -> UnboundedReceiver<IoResult<Packet>> {
         let (tx, rx) = unbounded_channel();
-        let token = msg.get_token().to_owned();
+        let token = packet.message.get_token().to_owned();
         self.synchronizer.set_sender(token, tx).await;
         return rx;
     }
@@ -249,8 +257,8 @@ impl<T: ClientTransport> CoapClientTransport<T> {
         return res;
     }
 
-    fn encode_packet(packet: &Packet) -> IoResult<Vec<u8>> {
-        packet
+    fn encode_message(message: &Message) -> IoResult<Vec<u8>> {
+        message
             .to_bytes()
             .map_err(|e| std::io::Error::new(ErrorKind::InvalidData, e.to_string()))
     }
@@ -260,7 +268,7 @@ impl<T: ClientTransport> CoapClientTransport<T> {
         msg: &Packet,
         receiver: &mut UnboundedReceiver<IoResult<Packet>>,
     ) -> IoResult<Packet> {
-        let bytes = Self::encode_packet(msg)?;
+        let bytes = Self::encode_message(&msg.message)?;
         self.transport.send(&bytes).await?;
         let try_receive: Result<Option<Result<Packet, Error>>, tokio::time::error::Elapsed> =
             timeout(self.timeout, receiver.recv()).await;
@@ -275,7 +283,7 @@ impl<T: ClientTransport> CoapClientTransport<T> {
         packet: &Packet,
         receiver: &mut UnboundedReceiver<IoResult<Packet>>,
     ) -> IoResult<Packet> {
-        if packet.header.get_type() == MessageType::Confirmable {
+        if packet.message.header.get_type() == MessageType::Confirmable {
             return self.try_send_confirmable_message(&packet, receiver).await;
         } else {
             return self
@@ -289,7 +297,7 @@ impl<T: ClientTransport> CoapClientTransport<T> {
         let result = self
             .do_request_response_for_packet_inner(packet, &mut receiver)
             .await;
-        self.synchronizer.remove_sender(packet.get_token()).await;
+        self.synchronizer.remove_sender(packet.message.get_token()).await;
         result
     }
 
@@ -309,11 +317,11 @@ pub struct UdpTransport {
 }
 #[async_trait]
 impl ClientTransport for UdpTransport {
-    async fn recv(&self, buf: &mut [u8]) -> std::io::Result<usize> {
-        self.socket
+    async fn recv(&self, buf: &mut [u8]) -> std::io::Result<(usize, Option<SocketAddr>)> {
+        let (read, addr) = self.socket
             .recv_from(buf)
-            .await
-            .map(|(recv_size, _addr)| recv_size)
+            .await?;
+        return Ok((read, Some(addr)));
     }
     async fn send(&self, buf: &[u8]) -> std::io::Result<usize> {
         self.socket.send_to(buf, self.peer_addr).await
@@ -481,7 +489,7 @@ impl UdpCoAPClient {
     ///   client.send_all_coap(&request, segment).await.unwrap();
     ///   loop {
     ///      let recv_packet = receiver.receive().await.unwrap();
-    ///      assert_eq!(recv_packet.payload, b"test-echo".to_vec());
+    ///      assert_eq!(recv_packet.message.payload, b"test-echo".to_vec());
     ///   }
     /// }
     /// ```
@@ -591,7 +599,7 @@ impl<T: ClientTransport + 'static> CoAPClient<T> {
     }
 
     /// Execute a single request (GET, POST, PUT, DELETE) with a coap url and a specfic timeout
-    /// using udp   
+    /// using udp
     pub async fn request_with_timeout(
         url: &str,
         method: Method,
@@ -619,7 +627,7 @@ impl<T: ClientTransport + 'static> CoAPClient<T> {
         self.receive(&mut request).await
     }
 
-    pub async fn observe<H: FnMut(Packet) + Send + 'static>(
+    pub async fn observe<H: FnMut(Message) + Send + 'static>(
         &self,
         resource_path: &str,
         handler: H,
@@ -634,7 +642,7 @@ impl<T: ClientTransport + 'static> CoAPClient<T> {
     /// Observe a resource with the handler and specified timeout using the given transport.
     /// Use the oneshot sender to cancel observation. If this sender is dropped without explicitly
     /// cancelling it, the observation will continue forever.
-    pub async fn observe_with_timeout<H: FnMut(Packet) + Send + 'static>(
+    pub async fn observe_with_timeout<H: FnMut(Message) + Send + 'static>(
         &mut self,
         resource_path: &str,
         handler: H,
@@ -651,7 +659,7 @@ impl<T: ClientTransport + 'static> CoAPClient<T> {
     /// Use this method if you need to set some specific options in your
     /// requests. This method will add observe flags and a message id as a fallback
     /// Use this method if you plan on re-using the same client for requests
-    pub async fn observe_with<H: FnMut(Packet) + Send + 'static>(
+    pub async fn observe_with<H: FnMut(Message) + Send + 'static>(
         &self,
         request: CoapRequest<SocketAddr>,
         mut handler: H,
@@ -723,17 +731,17 @@ impl<T: ClientTransport + 'static> CoAPClient<T> {
 
         let _ = self
             .transport
-            .do_request_response_for_packet(&deregister_packet.message)
+            .do_request_response_for_packet(&Packet {address:None, message: deregister_packet.message})
             .await;
     }
 
-    async fn receive_and_handle_message_observe<H: FnMut(Packet) + Send + 'static>(
+    async fn receive_and_handle_message_observe<H: FnMut(Message) + Send + 'static>(
         socket_result: IoResult<Packet>,
         handler: &mut H,
     ) {
         match socket_result {
             Ok(packet) => {
-                handler(packet);
+                handler(packet.message);
             }
             Err(e) => match e.kind() {
                 ErrorKind::WouldBlock => {
@@ -755,9 +763,9 @@ impl<T: ClientTransport + 'static> CoAPClient<T> {
     ) -> IoResult<CoapResponse> {
         let response = self
             .transport
-            .do_request_response_for_packet(&request.message)
+            .do_request_response_for_packet(&Packet {address:None, message:request.message.to_owned()})
             .await?;
-        Ok(CoapResponse { message: response })
+        Ok(CoapResponse { message: response.message })
     }
 
     /// low-level method to send a a request supporting block1 option based on
@@ -1214,7 +1222,7 @@ mod test {
 
     #[async_trait]
     impl ClientTransport for FaultyUdp {
-        async fn recv(&self, buf: &mut [u8]) -> std::io::Result<usize> {
+        async fn recv(&self, buf: &mut [u8]) -> std::io::Result<(usize, Option<SocketAddr>)> {
             self.udp.recv(buf).await
         }
 
@@ -1381,7 +1389,7 @@ mod test {
     }
     #[async_trait]
     impl ClientTransport for FaultyReceiver {
-        async fn recv(&self, buf: &mut [u8]) -> std::io::Result<usize> {
+        async fn recv(&self, buf: &mut [u8]) -> std::io::Result<(usize, Option<SocketAddr>)> {
             let mut mutex = self.should_fail.lock().await;
             tokio::select! {
                 e = mutex.deref_mut() => {
diff --git a/src/dtls.rs b/src/dtls.rs
index aee905d07..43282f0fe 100644
--- a/src/dtls.rs
+++ b/src/dtls.rs
@@ -42,13 +42,13 @@ pub struct DtlsResponse {
 
 #[async_trait]
 impl ClientTransport for DtlsConnection {
-    async fn recv(&self, buf: &mut [u8]) -> IoResult<usize> {
+    async fn recv(&self, buf: &mut [u8]) -> IoResult<(usize, Option<SocketAddr>)> {
         let read = self
             .conn
             .read(buf, None)
             .await
             .map_err(|e| Error::new(ErrorKind::Other, e))?;
-        return Ok(read);
+        return Ok((read, self.conn.remote_addr()));
     }
 
     async fn send(&self, buf: &[u8]) -> IoResult<usize> {
@@ -108,7 +108,7 @@ pub struct DtlsConnection {
 }
 
 impl DtlsConnection {
-    /// Creates a new DTLS connection from a given connection. This connection can be  
+    /// Creates a new DTLS connection from a given connection. This connection can be
     /// a tokio UDP socket or a user-created struct implementing Conn, Send, and Sync
     ///
     ///
@@ -187,7 +187,7 @@ mod test {
     use rcgen::KeyPair;
     use std::fs::File;
     use std::io::{BufReader, Read};
-    use std::net::{SocketAddr, ToSocketAddrs};
+    use std::net::{IpAddr, Ipv4Addr, SocketAddr, ToSocketAddrs};
     use std::sync::atomic::AtomicBool;
     use tokio::sync::mpsc;
     use tokio::time::sleep;
@@ -635,7 +635,7 @@ mod test {
             todo!("not needed");
         }
         fn remote_addr(&self) -> Option<SocketAddr> {
-            todo!("not needed")
+            Some(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), 0))
         }
         async fn close(&self) -> WebrtcResult<()> {
             Ok(self.0.close().await?)
diff --git a/src/server.rs b/src/server.rs
index 4689cbfe9..38ad2fd34 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -817,7 +817,7 @@ pub mod test {
         let mut receiver = client.create_receiver_for(&request).await;
         client.send_all_coap(&request, segment).await.unwrap();
         let recv_packet = receiver.receive().await.unwrap();
-        assert_eq!(recv_packet.payload, b"test-echo".to_vec());
+        assert_eq!(recv_packet.message.payload, b"test-echo".to_vec());
     }
 
     //This test right now does not work on windows
@@ -872,7 +872,7 @@ pub mod test {
         let mut receiver = client.create_receiver_for(&request).await;
         client.send_all_coap(&request, segment).await.unwrap();
         let recv_packet = receiver.receive().await.unwrap();
-        assert_eq!(recv_packet.payload, b"test-echo".to_vec());
+        assert_eq!(recv_packet.message.payload, b"test-echo".to_vec());
     }
 
     #[test]