[ipa] Make sending of ID REQ public...

Make sending of the ID Request message public. We are going
to use this in the BSC NAT code to ask for querying the BSC.
diff --git a/openbsc/src/input/ipaccess.c b/openbsc/src/input/ipaccess.c
index 6c7ab03..7fc7578 100644
--- a/openbsc/src/input/ipaccess.c
+++ b/openbsc/src/input/ipaccess.c
@@ -170,6 +170,11 @@
 	return write(fd, id_ack, sizeof(id_ack));
 }
 
+int ipaccess_send_id_req(int fd)
+{
+	return write(fd, id_req, sizeof(id_req));
+}
+
 /* base handling of the ip.access protocol */
 int ipaccess_rcvmsg_base(struct msgb *msg,
 			 struct bsc_fd *bfd)
@@ -536,7 +541,7 @@
 	}
 
 	/* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */
-	ret = write(bfd->fd, id_req, sizeof(id_req));
+	ret = ipaccess_send_id_req(bfd->fd);
 
         return ret;
 	//return e1inp_line_register(line);