authentication and start of connection

ssh-transport/src/channel.rs

@@ -0,0 +1,40 @@
+use tracing::debug;
+
+use crate::packet::Packet;
+use crate::parse::Parser;
+use crate::Result;
+use crate::client_error;
+
+pub(crate) struct ServerChannelsState {}
+
+impl ServerChannelsState {
+    pub(crate) fn new() -> Self {
+        ServerChannelsState {}
+    }
+
+    pub(crate) fn on_packet(&mut self, packet_type: u8, mut payload: Parser<'_>) -> Result<()> {
+        match packet_type {
+            Packet::SSH_MSG_CHANNEL_OPEN => {
+                // <https://datatracker.ietf.org/doc/html/rfc4254#section-5.1>
+                let channel_type = payload.utf8_string()?;
+                let sender_channel = payload.u32()?;
+                let initial_window_size = payload.u32()?;
+                let max_packet_size = payload.u32()?;
+
+                debug!(?channel_type, ?sender_channel, "Opening channel");
+
+                match channel_type {
+                    "session" => {
+                        todo!("open session")
+                    }
+                    _ => todo!("response with SSH_MSG_CHANNEL_OPEN_FAILURE"),
+                }
+            }
+            _ => {
+                todo!("{packet_type}");
+            }
+        }
+
+        Ok(())
+    }
+}