Revert "Merge pull request #4370 from nymtech/jon/reply-on-ipr-version-incompat"

This reverts commit a8dc703399, reversing
changes made to e09986e505.

common/ip-packet-requests/src/lib.rs

@@ -1,7 +1,319 @@
-pub mod request;
-pub mod response;
+use std::net::IpAddr;
 
-pub const CURRENT_VERSION: u8 = 2;
+use nym_sphinx::addressing::clients::Recipient;
+use serde::{Deserialize, Serialize};
+
+pub const CURRENT_VERSION: u8 = 1;
+
+fn generate_random() -> u64 {
+    use rand::RngCore;
+    let mut rng = rand::rngs::OsRng;
+    rng.next_u64()
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct IpPacketRequest {
+    pub version: u8,
+    pub data: IpPacketRequestData,
+}
+
+impl IpPacketRequest {
+    pub fn new_static_connect_request(
+        ip: IpAddr,
+        reply_to: Recipient,
+        reply_to_hops: Option<u8>,
+        reply_to_avg_mix_delays: Option<f64>,
+    ) -> (Self, u64) {
+        let request_id = generate_random();
+        (
+            Self {
+                version: CURRENT_VERSION,
+                data: IpPacketRequestData::StaticConnect(StaticConnectRequest {
+                    request_id,
+                    ip,
+                    reply_to,
+                    reply_to_hops,
+                    reply_to_avg_mix_delays,
+                }),
+            },
+            request_id,
+        )
+    }
+
+    pub fn new_dynamic_connect_request(
+        reply_to: Recipient,
+        reply_to_hops: Option<u8>,
+        reply_to_avg_mix_delays: Option<f64>,
+    ) -> (Self, u64) {
+        let request_id = generate_random();
+        (
+            Self {
+                version: CURRENT_VERSION,
+                data: IpPacketRequestData::DynamicConnect(DynamicConnectRequest {
+                    request_id,
+                    reply_to,
+                    reply_to_hops,
+                    reply_to_avg_mix_delays,
+                }),
+            },
+            request_id,
+        )
+    }
+
+    pub fn new_ip_packet(ip_packet: bytes::Bytes) -> Self {
+        Self {
+            version: CURRENT_VERSION,
+            data: IpPacketRequestData::Data(DataRequest { ip_packet }),
+        }
+    }
+
+    pub fn id(&self) -> Option<u64> {
+        match &self.data {
+            IpPacketRequestData::StaticConnect(request) => Some(request.request_id),
+            IpPacketRequestData::DynamicConnect(request) => Some(request.request_id),
+            IpPacketRequestData::Data(_) => None,
+        }
+    }
+
+    pub fn recipient(&self) -> Option<&Recipient> {
+        match &self.data {
+            IpPacketRequestData::StaticConnect(request) => Some(&request.reply_to),
+            IpPacketRequestData::DynamicConnect(request) => Some(&request.reply_to),
+            IpPacketRequestData::Data(_) => None,
+        }
+    }
+
+    pub fn to_bytes(&self) -> Result<Vec<u8>, bincode::Error> {
+        use bincode::Options;
+        make_bincode_serializer().serialize(self)
+    }
+
+    pub fn from_reconstructed_message(
+        message: &nym_sphinx::receiver::ReconstructedMessage,
+    ) -> Result<Self, bincode::Error> {
+        use bincode::Options;
+        make_bincode_serializer().deserialize(&message.message)
+    }
+}
+
+#[allow(clippy::large_enum_variant)]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+pub enum IpPacketRequestData {
+    StaticConnect(StaticConnectRequest),
+    DynamicConnect(DynamicConnectRequest),
+    Data(DataRequest),
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+pub struct StaticConnectRequest {
+    pub request_id: u64,
+    pub ip: IpAddr,
+    // The nym-address the response should be sent back to
+    pub reply_to: Recipient,
+    // The number of mix node hops that responses should take, in addition to the entry and exit
+    // node. Zero means only client -> entry -> exit -> client.
+    pub reply_to_hops: Option<u8>,
+    // The average delay at each mix node, in milliseconds. Currently this is not supported by the
+    // ip packet router.
+    pub reply_to_avg_mix_delays: Option<f64>,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+pub struct DynamicConnectRequest {
+    pub request_id: u64,
+    // The nym-address the response should be sent back to
+    pub reply_to: Recipient,
+    // The number of mix node hops that responses should take, in addition to the entry and exit
+    // node. Zero means only client -> entry -> exit -> client.
+    pub reply_to_hops: Option<u8>,
+    // The average delay at each mix node, in milliseconds. Currently this is not supported by the
+    // ip packet router.
+    pub reply_to_avg_mix_delays: Option<f64>,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+pub struct DataRequest {
+    pub ip_packet: bytes::Bytes,
+}
+
+// ---
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct IpPacketResponse {
+    pub version: u8,
+    pub data: IpPacketResponseData,
+}
+
+impl IpPacketResponse {
+    pub fn new_static_connect_success(request_id: u64, reply_to: Recipient) -> Self {
+        Self {
+            version: CURRENT_VERSION,
+            data: IpPacketResponseData::StaticConnect(StaticConnectResponse {
+                request_id,
+                reply_to,
+                reply: StaticConnectResponseReply::Success,
+            }),
+        }
+    }
+
+    pub fn new_static_connect_failure(
+        request_id: u64,
+        reply_to: Recipient,
+        reason: StaticConnectFailureReason,
+    ) -> Self {
+        Self {
+            version: CURRENT_VERSION,
+            data: IpPacketResponseData::StaticConnect(StaticConnectResponse {
+                request_id,
+                reply_to,
+                reply: StaticConnectResponseReply::Failure(reason),
+            }),
+        }
+    }
+
+    pub fn new_dynamic_connect_success(request_id: u64, reply_to: Recipient, ip: IpAddr) -> Self {
+        Self {
+            version: CURRENT_VERSION,
+            data: IpPacketResponseData::DynamicConnect(DynamicConnectResponse {
+                request_id,
+                reply_to,
+                reply: DynamicConnectResponseReply::Success(DynamicConnectSuccess { ip }),
+            }),
+        }
+    }
+
+    pub fn new_dynamic_connect_failure(
+        request_id: u64,
+        reply_to: Recipient,
+        reason: DynamicConnectFailureReason,
+    ) -> Self {
+        Self {
+            version: CURRENT_VERSION,
+            data: IpPacketResponseData::DynamicConnect(DynamicConnectResponse {
+                request_id,
+                reply_to,
+                reply: DynamicConnectResponseReply::Failure(reason),
+            }),
+        }
+    }
+
+    pub fn new_ip_packet(ip_packet: bytes::Bytes) -> Self {
+        Self {
+            version: CURRENT_VERSION,
+            data: IpPacketResponseData::Data(DataResponse { ip_packet }),
+        }
+    }
+
+    pub fn id(&self) -> Option<u64> {
+        match &self.data {
+            IpPacketResponseData::StaticConnect(response) => Some(response.request_id),
+            IpPacketResponseData::DynamicConnect(response) => Some(response.request_id),
+            IpPacketResponseData::Data(_) => None,
+        }
+    }
+
+    pub fn recipient(&self) -> Option<&Recipient> {
+        match &self.data {
+            IpPacketResponseData::StaticConnect(response) => Some(&response.reply_to),
+            IpPacketResponseData::DynamicConnect(response) => Some(&response.reply_to),
+            IpPacketResponseData::Data(_) => None,
+        }
+    }
+
+    pub fn to_bytes(&self) -> Result<Vec<u8>, bincode::Error> {
+        use bincode::Options;
+        make_bincode_serializer().serialize(self)
+    }
+
+    pub fn from_reconstructed_message(
+        message: &nym_sphinx::receiver::ReconstructedMessage,
+    ) -> Result<Self, bincode::Error> {
+        use bincode::Options;
+        make_bincode_serializer().deserialize(&message.message)
+    }
+}
+
+#[allow(clippy::large_enum_variant)]
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub enum IpPacketResponseData {
+    StaticConnect(StaticConnectResponse),
+    DynamicConnect(DynamicConnectResponse),
+    Data(DataResponse),
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct StaticConnectResponse {
+    pub request_id: u64,
+    pub reply_to: Recipient,
+    pub reply: StaticConnectResponseReply,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub enum StaticConnectResponseReply {
+    Success,
+    Failure(StaticConnectFailureReason),
+}
+
+impl StaticConnectResponseReply {
+    pub fn is_success(&self) -> bool {
+        match self {
+            StaticConnectResponseReply::Success => true,
+            StaticConnectResponseReply::Failure(_) => false,
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, thiserror::Error)]
+pub enum StaticConnectFailureReason {
+    #[error("requested ip address is already in use")]
+    RequestedIpAlreadyInUse,
+    #[error("requested nym-address is already in use")]
+    RequestedNymAddressAlreadyInUse,
+    #[error("{0}")]
+    Other(String),
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct DynamicConnectResponse {
+    pub request_id: u64,
+    pub reply_to: Recipient,
+    pub reply: DynamicConnectResponseReply,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub enum DynamicConnectResponseReply {
+    Success(DynamicConnectSuccess),
+    Failure(DynamicConnectFailureReason),
+}
+
+impl DynamicConnectResponseReply {
+    pub fn is_success(&self) -> bool {
+        match self {
+            DynamicConnectResponseReply::Success(_) => true,
+            DynamicConnectResponseReply::Failure(_) => false,
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct DynamicConnectSuccess {
+    pub ip: IpAddr,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, thiserror::Error)]
+pub enum DynamicConnectFailureReason {
+    #[error("requested nym-address is already in use")]
+    RequestedNymAddressAlreadyInUse,
+    #[error("no available ip address")]
+    NoAvailableIp,
+    #[error("{0}")]
+    Other(String),
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct DataResponse {
+    pub ip_packet: bytes::Bytes,
+}
 
 fn make_bincode_serializer() -> impl bincode::Options {
     use bincode::Options;
@@ -9,3 +321,63 @@ fn make_bincode_serializer() -> impl bincode::Options {
         .with_big_endian()
         .with_varint_encoding()
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn check_size_of_request() {
+        let connect = IpPacketRequest {
+            version: 4,
+            data: IpPacketRequestData::StaticConnect(
+                StaticConnectRequest {
+                    request_id: 123,
+                    ip: IpAddr::from([10, 0, 0, 1]),
+                    reply_to: Recipient::try_from_base58_string("D1rrpsysCGCYXy9saP8y3kmNpGtJZUXN9SvFoUcqAsM9.9Ssso1ea5NfkbMASdiseDSjTN1fSWda5SgEVjdSN4CvV@GJqd3ZxpXWSNxTfx7B1pPtswpetH4LnJdFeLeuY5KUuN").unwrap(),
+                    reply_to_hops: None,
+                    reply_to_avg_mix_delays: None,
+                },
+            )
+        };
+        assert_eq!(connect.to_bytes().unwrap().len(), 107);
+    }
+
+    #[test]
+    fn check_size_of_data() {
+        let data = IpPacketRequest {
+            version: 4,
+            data: IpPacketRequestData::Data(DataRequest {
+                ip_packet: bytes::Bytes::from(vec![1u8; 32]),
+            }),
+        };
+        assert_eq!(data.to_bytes().unwrap().len(), 35);
+    }
+
+    #[test]
+    fn serialize_and_deserialize_data_request() {
+        let data = IpPacketRequest {
+            version: 4,
+            data: IpPacketRequestData::Data(DataRequest {
+                ip_packet: bytes::Bytes::from(vec![1, 2, 4, 2, 5]),
+            }),
+        };
+
+        let serialized = data.to_bytes().unwrap();
+        let deserialized = IpPacketRequest::from_reconstructed_message(
+            &nym_sphinx::receiver::ReconstructedMessage {
+                message: serialized,
+                sender_tag: None,
+            },
+        )
+        .unwrap();
+
+        assert_eq!(deserialized.version, 4);
+        assert_eq!(
+            deserialized.data,
+            IpPacketRequestData::Data(DataRequest {
+                ip_packet: bytes::Bytes::from(vec![1, 2, 4, 2, 5]),
+            })
+        );
+    }
+}

common/ip-packet-requests/src/request.rs

@@ -1,221 +0,0 @@
-use std::net::IpAddr;
-
-use nym_sphinx::addressing::clients::Recipient;
-use serde::{Deserialize, Serialize};
-
-use crate::{make_bincode_serializer, CURRENT_VERSION};
-
-fn generate_random() -> u64 {
-    use rand::RngCore;
-    let mut rng = rand::rngs::OsRng;
-    rng.next_u64()
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct IpPacketRequest {
-    pub version: u8,
-    pub data: IpPacketRequestData,
-}
-
-impl IpPacketRequest {
-    pub fn new_static_connect_request(
-        ip: IpAddr,
-        reply_to: Recipient,
-        reply_to_hops: Option<u8>,
-        reply_to_avg_mix_delays: Option<f64>,
-    ) -> (Self, u64) {
-        let request_id = generate_random();
-        (
-            Self {
-                version: CURRENT_VERSION,
-                data: IpPacketRequestData::StaticConnect(StaticConnectRequest {
-                    request_id,
-                    ip,
-                    reply_to,
-                    reply_to_hops,
-                    reply_to_avg_mix_delays,
-                }),
-            },
-            request_id,
-        )
-    }
-
-    pub fn new_dynamic_connect_request(
-        reply_to: Recipient,
-        reply_to_hops: Option<u8>,
-        reply_to_avg_mix_delays: Option<f64>,
-    ) -> (Self, u64) {
-        let request_id = generate_random();
-        (
-            Self {
-                version: CURRENT_VERSION,
-                data: IpPacketRequestData::DynamicConnect(DynamicConnectRequest {
-                    request_id,
-                    reply_to,
-                    reply_to_hops,
-                    reply_to_avg_mix_delays,
-                }),
-            },
-            request_id,
-        )
-    }
-
-    pub fn new_disconnect_request(reply_to: Recipient) -> (Self, u64) {
-        let request_id = generate_random();
-        (
-            Self {
-                version: CURRENT_VERSION,
-                data: IpPacketRequestData::Disconnect(DisconnectRequest {
-                    request_id,
-                    reply_to,
-                }),
-            },
-            request_id,
-        )
-    }
-
-    pub fn new_ip_packet(ip_packet: bytes::Bytes) -> Self {
-        Self {
-            version: CURRENT_VERSION,
-            data: IpPacketRequestData::Data(DataRequest { ip_packet }),
-        }
-    }
-
-    pub fn id(&self) -> Option<u64> {
-        match &self.data {
-            IpPacketRequestData::StaticConnect(request) => Some(request.request_id),
-            IpPacketRequestData::DynamicConnect(request) => Some(request.request_id),
-            IpPacketRequestData::Disconnect(request) => Some(request.request_id),
-            IpPacketRequestData::Data(_) => None,
-        }
-    }
-
-    pub fn recipient(&self) -> Option<&Recipient> {
-        match &self.data {
-            IpPacketRequestData::StaticConnect(request) => Some(&request.reply_to),
-            IpPacketRequestData::DynamicConnect(request) => Some(&request.reply_to),
-            IpPacketRequestData::Disconnect(request) => Some(&request.reply_to),
-            IpPacketRequestData::Data(_) => None,
-        }
-    }
-
-    pub fn to_bytes(&self) -> Result<Vec<u8>, bincode::Error> {
-        use bincode::Options;
-        make_bincode_serializer().serialize(self)
-    }
-
-    pub fn from_reconstructed_message(
-        message: &nym_sphinx::receiver::ReconstructedMessage,
-    ) -> Result<Self, bincode::Error> {
-        use bincode::Options;
-        make_bincode_serializer().deserialize(&message.message)
-    }
-}
-
-#[allow(clippy::large_enum_variant)]
-#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
-pub enum IpPacketRequestData {
-    StaticConnect(StaticConnectRequest),
-    DynamicConnect(DynamicConnectRequest),
-    Disconnect(DisconnectRequest),
-    Data(DataRequest),
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
-pub struct StaticConnectRequest {
-    pub request_id: u64,
-    pub ip: IpAddr,
-    // The nym-address the response should be sent back to
-    pub reply_to: Recipient,
-    // The number of mix node hops that responses should take, in addition to the entry and exit
-    // node. Zero means only client -> entry -> exit -> client.
-    pub reply_to_hops: Option<u8>,
-    // The average delay at each mix node, in milliseconds. Currently this is not supported by the
-    // ip packet router.
-    pub reply_to_avg_mix_delays: Option<f64>,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
-pub struct DynamicConnectRequest {
-    pub request_id: u64,
-    // The nym-address the response should be sent back to
-    pub reply_to: Recipient,
-    // The number of mix node hops that responses should take, in addition to the entry and exit
-    // node. Zero means only client -> entry -> exit -> client.
-    pub reply_to_hops: Option<u8>,
-    // The average delay at each mix node, in milliseconds. Currently this is not supported by the
-    // ip packet router.
-    pub reply_to_avg_mix_delays: Option<f64>,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
-pub struct DisconnectRequest {
-    pub request_id: u64,
-    // The nym-address the response should be sent back to
-    pub reply_to: Recipient,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
-pub struct DataRequest {
-    pub ip_packet: bytes::Bytes,
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn check_size_of_request() {
-        let connect = IpPacketRequest {
-            version: 4,
-            data: IpPacketRequestData::StaticConnect(
-                StaticConnectRequest {
-                    request_id: 123,
-                    ip: IpAddr::from([10, 0, 0, 1]),
-                    reply_to: Recipient::try_from_base58_string("D1rrpsysCGCYXy9saP8y3kmNpGtJZUXN9SvFoUcqAsM9.9Ssso1ea5NfkbMASdiseDSjTN1fSWda5SgEVjdSN4CvV@GJqd3ZxpXWSNxTfx7B1pPtswpetH4LnJdFeLeuY5KUuN").unwrap(),
-                    reply_to_hops: None,
-                    reply_to_avg_mix_delays: None,
-                },
-            )
-        };
-        assert_eq!(connect.to_bytes().unwrap().len(), 107);
-    }
-
-    #[test]
-    fn check_size_of_data() {
-        let data = IpPacketRequest {
-            version: 4,
-            data: IpPacketRequestData::Data(DataRequest {
-                ip_packet: bytes::Bytes::from(vec![1u8; 32]),
-            }),
-        };
-        assert_eq!(data.to_bytes().unwrap().len(), 35);
-    }
-
-    #[test]
-    fn serialize_and_deserialize_data_request() {
-        let data = IpPacketRequest {
-            version: 4,
-            data: IpPacketRequestData::Data(DataRequest {
-                ip_packet: bytes::Bytes::from(vec![1, 2, 4, 2, 5]),
-            }),
-        };
-
-        let serialized = data.to_bytes().unwrap();
-        let deserialized = IpPacketRequest::from_reconstructed_message(
-            &nym_sphinx::receiver::ReconstructedMessage {
-                message: serialized,
-                sender_tag: None,
-            },
-        )
-        .unwrap();
-
-        assert_eq!(deserialized.version, 4);
-        assert_eq!(
-            deserialized.data,
-            IpPacketRequestData::Data(DataRequest {
-                ip_packet: bytes::Bytes::from(vec![1, 2, 4, 2, 5]),
-            })
-        );
-    }
-}

common/ip-packet-requests/src/response.rs

@@ -1,262 +0,0 @@
-use std::net::IpAddr;
-
-use nym_sphinx::addressing::clients::Recipient;
-use serde::{Deserialize, Serialize};
-
-use crate::{make_bincode_serializer, CURRENT_VERSION};
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct IpPacketResponse {
-    pub version: u8,
-    pub data: IpPacketResponseData,
-}
-
-impl IpPacketResponse {
-    pub fn new_static_connect_success(request_id: u64, reply_to: Recipient) -> Self {
-        Self {
-            version: CURRENT_VERSION,
-            data: IpPacketResponseData::StaticConnect(StaticConnectResponse {
-                request_id,
-                reply_to,
-                reply: StaticConnectResponseReply::Success,
-            }),
-        }
-    }
-
-    pub fn new_static_connect_failure(
-        request_id: u64,
-        reply_to: Recipient,
-        reason: StaticConnectFailureReason,
-    ) -> Self {
-        Self {
-            version: CURRENT_VERSION,
-            data: IpPacketResponseData::StaticConnect(StaticConnectResponse {
-                request_id,
-                reply_to,
-                reply: StaticConnectResponseReply::Failure(reason),
-            }),
-        }
-    }
-
-    pub fn new_dynamic_connect_success(request_id: u64, reply_to: Recipient, ip: IpAddr) -> Self {
-        Self {
-            version: CURRENT_VERSION,
-            data: IpPacketResponseData::DynamicConnect(DynamicConnectResponse {
-                request_id,
-                reply_to,
-                reply: DynamicConnectResponseReply::Success(DynamicConnectSuccess { ip }),
-            }),
-        }
-    }
-
-    pub fn new_dynamic_connect_failure(
-        request_id: u64,
-        reply_to: Recipient,
-        reason: DynamicConnectFailureReason,
-    ) -> Self {
-        Self {
-            version: CURRENT_VERSION,
-            data: IpPacketResponseData::DynamicConnect(DynamicConnectResponse {
-                request_id,
-                reply_to,
-                reply: DynamicConnectResponseReply::Failure(reason),
-            }),
-        }
-    }
-
-    pub fn new_ip_packet(ip_packet: bytes::Bytes) -> Self {
-        Self {
-            version: CURRENT_VERSION,
-            data: IpPacketResponseData::Data(DataResponse { ip_packet }),
-        }
-    }
-
-    pub fn new_version_mismatch(
-        request_id: u64,
-        reply_to: Recipient,
-        request_version: u8,
-        our_version: u8,
-    ) -> Self {
-        Self {
-            version: CURRENT_VERSION,
-            data: IpPacketResponseData::Error(ErrorResponse {
-                request_id,
-                reply_to,
-                reply: ErrorResponseReply::VersionMismatch {
-                    request_version,
-                    response_version: our_version,
-                },
-            }),
-        }
-    }
-
-    pub fn new_data_error_response(reply_to: Recipient, reply: ErrorResponseReply) -> Self {
-        Self {
-            version: CURRENT_VERSION,
-            data: IpPacketResponseData::Error(ErrorResponse {
-                request_id: 0,
-                reply_to,
-                reply,
-            }),
-        }
-    }
-
-    pub fn id(&self) -> Option<u64> {
-        match &self.data {
-            IpPacketResponseData::StaticConnect(response) => Some(response.request_id),
-            IpPacketResponseData::DynamicConnect(response) => Some(response.request_id),
-            IpPacketResponseData::Disconnect(response) => Some(response.request_id),
-            IpPacketResponseData::Data(_) => None,
-            IpPacketResponseData::Error(response) => Some(response.request_id),
-        }
-    }
-
-    pub fn recipient(&self) -> Option<&Recipient> {
-        match &self.data {
-            IpPacketResponseData::StaticConnect(response) => Some(&response.reply_to),
-            IpPacketResponseData::DynamicConnect(response) => Some(&response.reply_to),
-            IpPacketResponseData::Disconnect(response) => Some(&response.reply_to),
-            IpPacketResponseData::Data(_) => None,
-            IpPacketResponseData::Error(response) => Some(&response.reply_to),
-        }
-    }
-
-    pub fn to_bytes(&self) -> Result<Vec<u8>, bincode::Error> {
-        use bincode::Options;
-        make_bincode_serializer().serialize(self)
-    }
-
-    pub fn from_reconstructed_message(
-        message: &nym_sphinx::receiver::ReconstructedMessage,
-    ) -> Result<Self, bincode::Error> {
-        use bincode::Options;
-        make_bincode_serializer().deserialize(&message.message)
-    }
-}
-
-#[allow(clippy::large_enum_variant)]
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub enum IpPacketResponseData {
-    StaticConnect(StaticConnectResponse),
-    DynamicConnect(DynamicConnectResponse),
-    Disconnect(DisconnectResponse),
-    Data(DataResponse),
-    Error(ErrorResponse),
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct StaticConnectResponse {
-    pub request_id: u64,
-    pub reply_to: Recipient,
-    pub reply: StaticConnectResponseReply,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub enum StaticConnectResponseReply {
-    Success,
-    Failure(StaticConnectFailureReason),
-}
-
-impl StaticConnectResponseReply {
-    pub fn is_success(&self) -> bool {
-        match self {
-            StaticConnectResponseReply::Success => true,
-            StaticConnectResponseReply::Failure(_) => false,
-        }
-    }
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize, thiserror::Error)]
-pub enum StaticConnectFailureReason {
-    #[error("requested ip address is already in use")]
-    RequestedIpAlreadyInUse,
-    #[error("requested nym-address is already in use")]
-    RequestedNymAddressAlreadyInUse,
-    #[error("{0}")]
-    Other(String),
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct DynamicConnectResponse {
-    pub request_id: u64,
-    pub reply_to: Recipient,
-    pub reply: DynamicConnectResponseReply,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub enum DynamicConnectResponseReply {
-    Success(DynamicConnectSuccess),
-    Failure(DynamicConnectFailureReason),
-}
-
-impl DynamicConnectResponseReply {
-    pub fn is_success(&self) -> bool {
-        match self {
-            DynamicConnectResponseReply::Success(_) => true,
-            DynamicConnectResponseReply::Failure(_) => false,
-        }
-    }
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct DynamicConnectSuccess {
-    pub ip: IpAddr,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize, thiserror::Error)]
-pub enum DynamicConnectFailureReason {
-    #[error("requested nym-address is already in use")]
-    RequestedNymAddressAlreadyInUse,
-    #[error("no available ip address")]
-    NoAvailableIp,
-    #[error("{0}")]
-    Other(String),
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct DisconnectResponse {
-    pub request_id: u64,
-    pub reply_to: Recipient,
-    pub reply: DisconnectResponseReply,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub enum DisconnectResponseReply {
-    Success,
-    Failure(DisconnectFailureReason),
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize, thiserror::Error)]
-pub enum DisconnectFailureReason {
-    #[error("requested nym-address is not currently connected")]
-    RequestedNymAddressNotConnected,
-    #[error("{0}")]
-    Other(String),
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct DataResponse {
-    pub ip_packet: bytes::Bytes,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct ErrorResponse {
-    pub request_id: u64,
-    pub reply_to: Recipient,
-    pub reply: ErrorResponseReply,
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize, thiserror::Error)]
-pub enum ErrorResponseReply {
-    #[error("{msg}")]
-    Generic { msg: String },
-    #[error(
-        "version mismatch: response is v{request_version} and response is v{response_version}"
-    )]
-    VersionMismatch {
-        request_version: u8,
-        response_version: u8,
-    },
-    #[error("destination failed exit policy filter check: {dst}")]
-    ExitPolicyFilterCheckFailed { dst: String },
-}

service-providers/ip-packet-router/src/error.rs

@@ -57,6 +57,13 @@ pub enum IpPacketRouterError {
     #[error("the provided socket address, '{addr}' is not covered by the exit policy!")]
     AddressNotCoveredByExitPolicy { addr: SocketAddr },
 
+    // #[error("the provided ip address, '{ip}' is not covered by the exit policy!")]
+    // IpNotCoveredByExitPolicy { ip: IpAddr },
+    #[error("failed filter check: '{addr}'")]
+    AddressFailedFilterCheck { addr: SocketAddr },
+
+    // #[error("failed filter check: '{ip}'")]
+    // IpFailedFilterCheck { ip: IpAddr },
     #[error("failed to apply the exit policy: {source}")]
     ExitPolicyFailure {
         #[from]

service-providers/ip-packet-router/src/mixnet_listener.rs

@@ -5,11 +5,8 @@ use std::{
 
 use futures::StreamExt;
 use nym_ip_packet_requests::{
-    request::{IpPacketRequest, IpPacketRequestData},
-    response::{
-        DynamicConnectFailureReason, ErrorResponseReply, IpPacketResponse,
-        StaticConnectFailureReason,
-    },
+    DynamicConnectFailureReason, IpPacketRequest, IpPacketRequestData, IpPacketResponse,
+    StaticConnectFailureReason,
 };
 use nym_sdk::mixnet::{MixnetMessageSender, Recipient};
 use nym_sphinx::receiver::ReconstructedMessage;
@@ -99,17 +96,13 @@ impl ConnectedClients {
         self.clients.contains_key(ip)
     }
 
-    fn get_client_from_ip_mut(&mut self, ip: &IpAddr) -> Option<&mut ConnectedClient> {
-        self.clients.get_mut(ip)
-    }
-
     fn is_nym_address_connected(&self, nym_address: &Recipient) -> bool {
         self.clients
             .values()
             .any(|client| client.nym_address == *nym_address)
     }
 
-    fn lookup_ip_from_nym_address(&self, nym_address: &Recipient) -> Option<IpAddr> {
+    fn get_ip(&self, nym_address: &Recipient) -> Option<IpAddr> {
         self.clients.iter().find_map(|(ip, client)| {
             if client.nym_address == *nym_address {
                 Some(*ip)
@@ -119,7 +112,7 @@ impl ConnectedClients {
         })
     }
 
-    fn lookup_client_from_nym_address(&self, nym_address: &Recipient) -> Option<&ConnectedClient> {
+    fn get_client_by_nym_address(&self, nym_address: &Recipient) -> Option<&ConnectedClient> {
         self.clients
             .values()
             .find(|client| client.nym_address == *nym_address)
@@ -185,17 +178,11 @@ pub(crate) struct ConnectedClient {
     pub(crate) last_activity: std::time::Instant,
 }
 
-impl ConnectedClient {
-    fn update_activity(&mut self) {
-        self.last_activity = std::time::Instant::now();
-    }
-}
-
 #[cfg(target_os = "linux")]
 impl MixnetListener {
     async fn on_static_connect_request(
         &mut self,
-        connect_request: nym_ip_packet_requests::request::StaticConnectRequest,
+        connect_request: nym_ip_packet_requests::StaticConnectRequest,
     ) -> Result<Option<IpPacketResponse>> {
         log::info!(
             "Received static connect request from {sender_address}",
@@ -257,7 +244,7 @@ impl MixnetListener {
 
     async fn on_dynamic_connect_request(
         &mut self,
-        connect_request: nym_ip_packet_requests::request::DynamicConnectRequest,
+        connect_request: nym_ip_packet_requests::DynamicConnectRequest,
     ) -> Result<Option<IpPacketResponse>> {
         log::info!(
             "Received dynamic connect request from {sender_address}",
@@ -273,7 +260,7 @@ impl MixnetListener {
         // TODO: this is problematic. Until we sign connect requests this means you can spam people
         // with return traffic
 
-        if let Some(existing_ip) = self.connected_clients.lookup_ip_from_nym_address(&reply_to) {
+        if let Some(existing_ip) = self.connected_clients.get_ip(&reply_to) {
             log::info!("Found existing client for nym address");
             if self
                 .connected_clients
@@ -305,17 +292,9 @@ impl MixnetListener {
         )))
     }
 
-    fn on_disconnect_request(
-        &self,
-        _disconnect_request: nym_ip_packet_requests::request::DisconnectRequest,
-    ) -> Result<Option<IpPacketResponse>> {
-        log::info!("Received disconnect request: not implemented, dropping");
-        Ok(None)
-    }
-
     async fn on_data_request(
         &mut self,
-        data_request: nym_ip_packet_requests::request::DataRequest,
+        data_request: nym_ip_packet_requests::DataRequest,
     ) -> Result<Option<IpPacketResponse>> {
         log::trace!("Received data request");
 
@@ -336,60 +315,30 @@ impl MixnetListener {
         let dst_str = dst.map_or(dst_addr.to_string(), |dst| dst.to_string());
         log::info!("Received packet: {packet_type}: {src_addr} -> {dst_str}");
 
-        if let Some(connected_client) = self.connected_clients.get_client_from_ip_mut(&src_addr) {
-            // Keep track of activity so we can disconnect inactive clients
-            connected_client.update_activity();
-
-            // For packets without a port, use 0.
-            let dst = dst.unwrap_or_else(|| SocketAddr::new(dst_addr, 0));
-
-            // Filter check
-            if self.request_filter.check_address(&dst).await {
-                // Forward the packet to the TUN device where it will be routed out to the internet
-                self.tun_writer
-                    .write_all(&data_request.ip_packet)
-                    .await
-                    .map_err(|_| IpPacketRouterError::FailedToWritePacketToTun)?;
-                Ok(None)
-            } else {
-                log::info!("Denied filter check: {dst}");
-                Ok(Some(IpPacketResponse::new_data_error_response(
-                    connected_client.nym_address,
-                    ErrorResponseReply::ExitPolicyFilterCheckFailed {
-                        dst: dst.to_string(),
-                    },
-                )))
-            }
-        } else {
-            // If the client is not connected, just drop the packet silently
+        // Check if there is a connected client for this src_addr. If there is, update the last activity time
+        // for the client. If there isn't, drop the packet.
+        if self.connected_clients.update_activity(&src_addr).is_err() {
             log::info!("Dropping packet: no connected client for {src_addr}");
-            Ok(None)
+            return Ok(None);
         }
+
+        // Filter check
+        let dst = dst.unwrap_or_else(|| SocketAddr::new(dst_addr, 0));
+        if !self.request_filter.check_address(&dst).await {
+            log::info!("Denied filter check: {dst}");
+            // TODO: we could consider sending back a response here
+            return Err(IpPacketRouterError::AddressFailedFilterCheck { addr: dst });
+        }
+
+        // TODO: consider changing from Vec<u8> to bytes::Bytes?
+        let packet = data_request.ip_packet;
+        self.tun_writer
+            .write_all(&packet)
+            .await
+            .map_err(|_| IpPacketRouterError::FailedToWritePacketToTun)?;
+
+        Ok(None)
     }
-
-    fn on_version_mismatch(
-        &self,
-        version: u8,
-        reconstructed: &ReconstructedMessage,
-    ) -> Result<Option<IpPacketResponse>> {
-        // If it's possible to parse, do so and return back a response, otherwise just drop
-        let (id, recipient) = IpPacketRequest::from_reconstructed_message(reconstructed)
-            .ok()
-            .and_then(|request| {
-                request
-                    .recipient()
-                    .map(|recipient| (request.id().unwrap_or(0), *recipient))
-            })
-            .ok_or(IpPacketRouterError::InvalidPacketVersion(version))?;
-
-        Ok(Some(IpPacketResponse::new_version_mismatch(
-            id,
-            recipient,
-            version,
-            nym_ip_packet_requests::CURRENT_VERSION,
-        )))
-    }
-
     async fn on_reconstructed_message(
         &mut self,
         reconstructed: ReconstructedMessage,
@@ -404,8 +353,8 @@ impl MixnetListener {
             // The idea is that in the future we can add logic here to parse older versions to stay
             // backwards compatible.
             if *version != nym_ip_packet_requests::CURRENT_VERSION {
-                log::info!("Received packet with invalid version: v{version}");
-                return self.on_version_mismatch(*version, &reconstructed);
+                log::warn!("Received packet with invalid version");
+                return Err(IpPacketRouterError::InvalidPacketVersion(*version));
             }
         }
 
@@ -419,9 +368,6 @@ impl MixnetListener {
             IpPacketRequestData::DynamicConnect(connect_request) => {
                 self.on_dynamic_connect_request(connect_request).await
             }
-            IpPacketRequestData::Disconnect(disconnect_request) => {
-                self.on_disconnect_request(disconnect_request)
-            }
             IpPacketRequestData::Data(data_request) => self.on_data_request(data_request).await,
         }
     }
@@ -442,7 +388,7 @@ impl MixnetListener {
         // We could avoid this lookup if we check this when we create the response.
         let mix_hops = self
             .connected_clients
-            .lookup_client_from_nym_address(recipient)
+            .get_client_by_nym_address(recipient)
             .and_then(|c| c.mix_hops);
 
         let input_message = create_input_message(*recipient, response_packet, mix_hops);

service-providers/ip-packet-router/src/tun_listener.rs

@@ -1,4 +1,4 @@
-use nym_ip_packet_requests::response::IpPacketResponse;
+use nym_ip_packet_requests::IpPacketResponse;
 use nym_sdk::mixnet::MixnetMessageSender;
 use nym_task::TaskClient;
 #[cfg(target_os = "linux")]