first implementation

signaling/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "signaling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+tonic = "0.11"
+prost = "0.12"
+serde = { version = "1" }
+tokio = { version = "1.0", features = ["macros", "rt-multi-thread"] }
+
+[build-dependencies]
+tonic-build = "0.11"
+
+[dev-dependencies]
+serde_json = "1"

signaling/build.rs

@@ -0,0 +1,21 @@
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    tonic_build::configure()
+        .type_attribute(
+            "Message",
+            "#[derive(serde::Deserialize, serde::Serialize)]\n#[serde(tag = \"type\")]",
+        )
+        .type_attribute(
+            "SignalingMessage",
+            "#[derive(serde::Deserialize, serde::Serialize)]\n#[serde(default)]",
+        )
+        .type_attribute(
+            "SDPMessage",
+            "#[derive(serde::Deserialize, serde::Serialize)]",
+        )
+        .type_attribute(
+            "ICECandidate",
+            "#[derive(serde::Deserialize, serde::Serialize)]",
+        )
+        .compile(&["proto/signaling.proto"], &["proto"])?;
+    Ok(())
+}

signaling/proto/signaling.proto

@@ -0,0 +1,44 @@
+syntax = "proto3";
+
+package signaling;
+
+option go_package = "git.jeffthecoder.xyz/public/chat-signaling-server/pkg/proto/signaling";
+
+import "google/protobuf/empty.proto";
+
+enum SDPMessageKind {
+  Video = 0;
+  Audio = 1;
+  VideoAudio = 2;
+  Data = 3;
+}
+
+message SDPMessage {
+  string SDP = 1;
+  SDPMessageKind Kind = 2;
+  string Sender = 3;
+}
+
+message ICECandidate {
+  string Candidate = 1;
+  string Sender = 2;
+}
+
+message SignalingMessage {
+  string Room = 1;
+  string Sender = 2;
+  optional string Receiver = 3;
+  oneof Message {
+    google.protobuf.Empty Bootstrap = 10;
+    google.protobuf.Empty DiscoverRequest = 11;
+    google.protobuf.Empty DiscoverResponse = 12;
+
+    SDPMessage SessionOffer = 13;
+    SDPMessage SessionAnswer = 14;
+    ICECandidate ICECandidate = 15;
+  };
+}
+
+service Signaling {
+  rpc Biu(stream SignalingMessage) returns (stream SignalingMessage);
+}

signaling/src/lib.rs

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+tonic::include_proto!("signaling"); // The string specified here must match the proto package name
+
+#[cfg(test)]
+mod test {
+    #[test]
+    fn serde_serialization() {
+        println!(
+            "{}",
+            serde_json::to_string(&crate::SignalingMessage {
+                message: Some(crate::signaling_message::Message::Bootstrap(())),
+                ..Default::default()
+            })
+            .unwrap()
+        );
+
+        println!(
+            "{}",
+            serde_json::to_string(&crate::SignalingMessage {
+                message: Some(crate::signaling_message::Message::SessionOffer(
+                    crate::SdpMessage {
+                        ..Default::default()
+                    }
+                )),
+                ..Default::default()
+            })
+            .unwrap()
+        );
+    }
+}