From 2aa028facb7ccbe48e85c8c444501cc3fb38ef24 Mon Sep 17 00:00:00 2001
From: Audrius Butkevicius <audrius.butkevicius@gmail.com>
Date: Sat, 31 Oct 2015 15:36:08 +0000
Subject: [PATCH] Add user-agent header, capitalize headers as others seems to
 do it (fixes #2422)

---
 lib/upnp/upnp.go | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/upnp/upnp.go b/lib/upnp/upnp.go
index f8e4cf9e..6031d146 100644
--- a/lib/upnp/upnp.go
+++ b/lib/upnp/upnp.go
@@ -158,10 +158,11 @@ func discover(intf *net.Interface, deviceType string, timeout time.Duration, res
 	ssdp := &net.UDPAddr{IP: []byte{239, 255, 255, 250}, Port: 1900}
 
 	tpl := `M-SEARCH * HTTP/1.1
-Host: 239.255.255.250:1900
-St: %s
-Man: "ssdp:discover"
-Mx: %d
+HOST: 239.255.255.250:1900
+ST: %s
+MAN: "ssdp:discover"
+MX: %d
+USER-AGENT: syncthing/1.0
 
 `
 	searchStr := fmt.Sprintf(tpl, deviceType, timeout/time.Second)