1 files changed, 35 insertions, 0 deletions
diff --git a/sip/src/transport/udp.rs b/sip/src/transport/udp.rs
new file mode 100644
index 0000000..c0d7829
--- /dev/null
+++ b/sip/src/transport/udp.rs
@@ -0,0 +1,35 @@
+use super::Transport;
+use crate::encoding::Message;
+use anyhow::{anyhow, Result};
+use log::debug;
+use std::str::FromStr;
+use tokio::net::UdpSocket;
+
+pub struct UdpTransport {
+    sock: UdpSocket,
+}
+
+impl UdpTransport {
+    pub async fn new(sock: UdpSocket) -> Result<Self> {
+        Ok(Self { sock })
+    }
+}
+impl Transport for UdpTransport {
+    async fn recv(&self) -> Result<Message> {
+        let mut buf = [0; 1024];
+        let size = self.sock.recv(&mut buf).await?;
+        let message = String::from_utf8(buf[..size].to_vec())?;
+        let (head, body) = message
+            .split_once("\r\n\r\n")
+            .ok_or(anyhow!("header end missing"))?;
+        debug!("<- {head}\n\n{body}");
+        let mut mesg = Message::from_str(head.trim_end())?;
+        *mesg.body_mut() = body.to_string();
+        Ok(mesg)
+    }
+    async fn send(&self, request: Message) -> Result<()> {
+        debug!("-> {request}");
+        self.sock.send(format!("{request}").as_bytes()).await?;
+        Ok(())
+    }
+}