changes...

src/rmc/message.rs

@@ -0,0 +1,61 @@
+use std::io;
+use std::io::{Read, Seek};
+use log::error;
+use crate::endianness::{IS_BIG_ENDIAN, ReadExtensions};
+use crate::rmc::response::{ErrorCode, RMCResponseResult};
+
+#[derive(Debug)]
+pub struct RMCMessage{
+    pub protocol_id: u16,
+    pub call_id: u32,
+    pub method_id: u32,
+
+    pub rest_of_data: Vec<u8>
+}
+
+impl RMCMessage{
+    pub fn new(stream: &mut (impl Seek + Read)) -> io::Result<Self>{
+        let size: u32 = stream.read_struct(IS_BIG_ENDIAN)?;
+
+        let mut header_size = 1 + 4 + 4;
+
+        let protocol_id: u8 = stream.read_struct(IS_BIG_ENDIAN)?;
+        let protocol_id= protocol_id & (!0x80);
+
+        let protocol_id: u16 = match protocol_id{
+            0x7F => {
+                header_size += 2;
+                stream.read_struct(IS_BIG_ENDIAN)?
+            },
+            _ => protocol_id as u16
+        };
+
+        let call_id = stream.read_struct(IS_BIG_ENDIAN)?;
+        let method_id = stream.read_struct(IS_BIG_ENDIAN)?;
+
+        let mut rest_of_data = Vec::new();
+
+        stream.read_to_end(&mut rest_of_data)?;
+
+        if header_size + rest_of_data.len() != size as usize {
+            error!("received incorrect rmc packet: expected size {} but found {}", size, header_size + rest_of_data.len());
+        }
+
+
+
+        //stream.
+        Ok(Self{
+            protocol_id,
+            method_id,
+            call_id,
+            rest_of_data
+        })
+    }
+
+    pub fn error_result_with_code(&self, error_code: ErrorCode) -> RMCResponseResult{
+        RMCResponseResult::Error {
+            call_id: self.call_id,
+            error_code
+        }
+    }
+}