From 7d7d72e53cdb4995f46c2907d2a85ddb8e99f02f Mon Sep 17 00:00:00 2001
From: Yves Junqueira <yves.junqueira@gmail.com>
Date: Thu, 19 Jan 2012 22:50:33 +0100
Subject: [PATCH] Move bencode-related methods to the bencode pkg.

This will allow a separation of the dht package.
---
 addresses.go | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 addresses.go

diff --git a/addresses.go b/addresses.go
new file mode 100644
index 0000000..6092098
--- /dev/null
+++ b/addresses.go
@@ -0,0 +1,23 @@
+package bencode
+
+import "fmt"
+
+// These are not strictly bencode features, but often needed by both DHT and
+// Torrent clients.
+
+func BinaryToDottedPort(port string) string {
+	return fmt.Sprintf("%d.%d.%d.%d:%d", port[0], port[1], port[2], port[3],
+		(uint16(port[4])<<8)|uint16(port[5]))
+}
+
+// 97.98.99.100:25958 becames "abcdef".
+func DottedPortToBinary(b string) string {
+	a := make([]byte, 6, 6)
+	var c uint16
+
+	fmt.Sscanf(b, "%d.%d.%d.%d:%d", &a[0], &a[1], &a[2], &a[3], &c)
+	a[4] = uint8(c >> 8)
+	a[5] = uint8(c)
+
+	return string(a)
+}