From 6372b6448c0dc3c4d421afa599586934915216a6 Mon Sep 17 00:00:00 2001
From: Richard Whitehouse <github@richardwhiuk.com>
Date: Sun, 29 Oct 2017 12:02:39 +0000
Subject: [PATCH] Support Allow header

---
 src/codec.rs  | 2 +-
 src/parser.rs | 9 ++++++++-
 src/types.rs  | 1 +
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/codec.rs b/src/codec.rs
index 044f2cf..7fa20c0 100644
--- a/src/codec.rs
+++ b/src/codec.rs
@@ -428,7 +428,7 @@ mod tests {
             io::write_all(socket,
                           "MESSAGE sip:test.com \
                            SIP/2.0\r\nAccept:text/plain\r\nAccept-Encoding:*\r\nAccept-Language:\
-                           en-gb\r\nAlert-Info:<http://www.example.com/sounds/moo.wav>\r\nVia: \
+                           en-gb\r\nAlert-Info:<http://www.example.com/sounds/moo.wav>\r\nAllow:MESSAGE\r\nVia: \
                            localhost\r\n\r\n")
         });
 
diff --git a/src/parser.rs b/src/parser.rs
index 3f8b08e..fa4051d 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -577,10 +577,17 @@ named!(alert_info_header<Vec<AlertParam>>, preceded!(
 		tag!(b","),
 		alert_param)));
 
+named!(allow_header<Vec<Method>>, preceded!(
+	tag!(b"Allow:"),
+	separated_nonempty_list!(
+		tag!(b","),
+		method)));
+
 named!(pub header<Header>, alt!(
 // RFC 3261 Headers
 	accept_header => { |a| Header::Accept(a) } |
 	accept_encoding_header => { |a| Header::AcceptEncoding(a) } |
 	accept_language_header => { |a| Header::AcceptLanguage(a) } |
-	alert_info_header => { |a| Header::AlertInfo(a) }
+	alert_info_header => { |a| Header::AlertInfo(a) } |
+	allow_header => { |a| Header::Allow(a) }
 ));
diff --git a/src/types.rs b/src/types.rs
index 467ca98..cc3c842 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -191,6 +191,7 @@ pub enum Header {
     AcceptEncoding(Vec<Encoding>),
     AcceptLanguage(Vec<Language>),
     AlertInfo(Vec<AlertParam>),
+    Allow(Vec<Method>),
     From(Uri),
     To(Uri),
     Extension { name: String, value: String },
-- 
2.34.1