1 files changed, 39 insertions, 0 deletions
diff --git a/sip/src/encoding/method.rs b/sip/src/encoding/method.rs
new file mode 100644
index 0000000..6d38cab
--- /dev/null
+++ b/sip/src/encoding/method.rs
@@ -0,0 +1,39 @@
+use anyhow::bail;
+use std::{fmt::Display, str::FromStr};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Method {
+    Register,
+    Invite,
+    Ack,
+    Options,
+    Cancel,
+    Bye,
+}
+
+impl Display for Method {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(match self {
+            Method::Register => "REGISTER",
+            Method::Invite => "INVITE",
+            Method::Ack => "ACK",
+            Method::Options => "OPTIONS",
+            Method::Cancel => "CANCEL",
+            Method::Bye => "BYE",
+        })
+    }
+}
+impl FromStr for Method {
+    type Err = anyhow::Error;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(match s {
+            "REGISTER" => Method::Register,
+            "INVITE" => Method::Invite,
+            "ACK" => Method::Ack,
+            "OPTIONS" => Method::Options,
+            "CANCEL" => Method::Cancel,
+            "BYE" => Method::Bye,
+            _ => bail!("unknown method"),
+        })
+    }
+}