diff --git a/src/connection.c b/src/connection.c
new file mode 100644
index 0000000..a35e322
--- /dev/null
+++ b/src/connection.c
@@ -0,0 +1,46 @@
+/*
+ * Connection management functions
+ *
+ * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <common/compat.h>
+#include <common/config.h>
+
+#include <types/connection.h>
+#include <types/stream_interface.h>
+
+/* I/O callback for fd-based connections. It calls the read/write handlers
+ * provided by the connection's sock_ops, which must be valid. It returns
+ * FD_WAIT_*.
+ */
+int conn_fd_handler(int fd)
+{
+	struct stream_interface *si = fdtab[fd].owner;
+	int ret = 0;
+
+	if (!si)
+		return ret;
+
+	if (si->conn.flags & CO_FL_ERROR)
+		return ret;
+
+	if (fdtab[fd].ev & (FD_POLL_IN | FD_POLL_HUP | FD_POLL_ERR))
+		if (!si->conn.data->read(fd))
+			ret |= FD_WAIT_READ;
+
+	if (si->conn.flags & CO_FL_ERROR)
+		return ret;
+
+	if (fdtab[fd].ev & (FD_POLL_OUT | FD_POLL_ERR))
+		if (!si->conn.data->write(fd))
+			ret |= FD_WAIT_WRITE;
+
+	return ret;
+}