--- /dev/null
+/*
+ * Copyright (c) 2001-2004 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.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_DEBUG_H__
+#define __LWIP_DEBUG_H__
+
+#include "lwip/arch.h"
+
+/** lower two bits indicate debug level
+ * - 0 off
+ * - 1 warning
+ * - 2 serious
+ * - 3 severe
+ */
+#define LWIP_DBG_LEVEL_OFF 0x00
+#define LWIP_DBG_LEVEL_WARNING 0x01 /* bad checksums, dropped packets, ... */
+#define LWIP_DBG_LEVEL_SERIOUS 0x02 /* memory allocation failures, ... */
+#define LWIP_DBG_LEVEL_SEVERE 0x03
+#define LWIP_DBG_MASK_LEVEL 0x03
+
+/** flag for LWIP_DEBUGF to enable that debug message */
+#define LWIP_DBG_ON 0x80U
+/** flag for LWIP_DEBUGF to disable that debug message */
+#define LWIP_DBG_OFF 0x00U
+
+/** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */
+#define LWIP_DBG_TRACE 0x40U
+/** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */
+#define LWIP_DBG_STATE 0x20U
+/** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */
+#define LWIP_DBG_FRESH 0x10U
+/** flag for LWIP_DEBUGF to halt after printing this debug message */
+#define LWIP_DBG_HALT 0x08U
+
+#ifndef LWIP_NOASSERT
+#define LWIP_ASSERT(x,y) do { if(!(y)) LWIP_PLATFORM_ASSERT(x); } while(0)
+#else /* LWIP_NOASSERT */
+#define LWIP_ASSERT(x,y)
+#endif /* LWIP_NOASSERT */
+
+/** print "m" message only if "e" is true, and execute "h" expression */
+#ifndef LWIP_ERROR
+#define LWIP_ERROR(m,e,h) do { if (!(e)) { LWIP_PLATFORM_ASSERT(m); h;}} while(0)
+#endif /* LWIP_ERROR */
+
+#ifdef LWIP_DEBUG
+/** print debug message only if debug message type is enabled...
+ * AND is of correct type AND is at least LWIP_DBG_LEVEL
+ */
+#define LWIP_DEBUGF(debug,x) do { \
+ if ( \
+ ((debug) & LWIP_DBG_ON) && \
+ ((debug) & LWIP_DBG_TYPES_ON) && \
+ ((s16_t)((debug) & LWIP_DBG_MASK_LEVEL) >= LWIP_DBG_MIN_LEVEL)) { \
+ LWIP_PLATFORM_DIAG(x); \
+ if ((debug) & LWIP_DBG_HALT) { \
+ while(1); \
+ } \
+ } \
+ } while(0)
+
+#else /* LWIP_DEBUG */
+#define LWIP_DEBUGF(debug,x)
+#endif /* LWIP_DEBUG */
+
+#endif /* __LWIP_DEBUG_H__ */
+
