1 files changed, 20 insertions, 0 deletions
diff --git a/src/net/host.h b/src/net/host.h
new file mode 100644
index 000000000..c96a7b434
--- /dev/null
+++ b/src/net/host.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <string>
+
+namespace net
+{
+    /*!
+    * \brief Canonicalize a hostname by converting letters to lowercase.
+    *
+    * \param host Hostname to canonicalize in-place.
+    */
+    inline void canonicalize_host(std::string& host) noexcept
+    {
+        for (char& c : host)
+        {
+            if ('A' <= c && c <= 'Z')
+                c = static_cast<char>(c - 'A' + 'a');
+        }
+    }
+}