1 files changed, 12 insertions, 0 deletions
diff --git a/lib/util.js b/lib/util.js
index 4fdbc24..731cc82 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -266,3 +266,15 @@ u.truncate = function (str, len) {
   str = String(str)
   return str.length > len ? str.substr(0, len) + '...' : str
 }
+
+u.extractHostPort = function (id, addr) {
+  var i = addr.lastIndexOf(':' + id)
+  if (i > -1 && addr.length === i + id.length + 1) {
+    return addr.substr(0, i)
+  }
+  var m = /^(?:net|onion):([^~;]*(?::[0-9]*)?)~shs:([0-9a-zA-Z/=+]{44})$/.exec(addr)
+  if (m && id === '@' + m[2] + '.ed25519') {
+    return m[1]
+  }
+  return addr
+}