From c60d0de919965901b8ef35fbc314b14bafd3c729 Mon Sep 17 00:00:00 2001
From: jani <jani>
Date: Mon, 24 Mar 2003 10:54:03 +0000
Subject: [PATCH] Add sio.h containing interface to platform specific serial
 layer.Make slipif use it instead of defining extern functions.This is in
 preparation for PPP

---
 src/include/lwip/sio.h | 40 ++++++++++++++++++++++++++++++++++++++++
 src/netif/slipif.c     |  6 +-----
 2 files changed, 41 insertions(+), 5 deletions(-)
 create mode 100644 src/include/lwip/sio.h

diff --git a/src/include/lwip/sio.h b/src/include/lwip/sio.h
new file mode 100644
index 00000000..50e5996b
--- /dev/null
+++ b/src/include/lwip/sio.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ */
+
+/*
+ * This is the interface to the platform specific serial IO module
+ * It needs to be implemented by those platforms which need SLIP or PPP
+ * This is still preliminary and will surely be extended for PPP
+ */
+
+#include "arch/cc.h"
+
+void * sio_open(u8_t);
+void sio_send(u8_t, void*);
+u8_t sio_recv(void *);
diff --git a/src/netif/slipif.c b/src/netif/slipif.c
index ef43a04d..498ec58e 100644
--- a/src/netif/slipif.c
+++ b/src/netif/slipif.c
@@ -42,6 +42,7 @@
 #include "lwip/pbuf.h"
 #include "lwip/sys.h"
 #include "lwip/stats.h"
+#include "lwip/sio.h"
 
 #define SLIP_END     0300
 #define SLIP_ESC     0333
@@ -50,11 +51,6 @@
 
 #define MAX_SIZE     1500
 
-/* Low level serial functions */
-extern void sio_send(u8_t, void*);
-extern u8_t sio_recv(void *);
-extern void * sio_open(u8_t);
-
 /**
  * Send a pbuf doing the necessary SLIP encapsulation
  *