166 lines
5.1 KiB
C
166 lines
5.1 KiB
C
/****************************************************************************
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* net/iob/iob_dump.c
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <debug.h>
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#include <nuttx/net/iob.h>
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#ifdef CONFIG_DEBUG_FEATURES
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/****************************************************************************
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* Pre-processor definitions
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****************************************************************************/
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#ifndef MIN
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# define MIN(a,b) ((a) < (b) ? (a) : (b))
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: iob_dump
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*
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* Description:
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* Dump the contents of a I/O buffer chain
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*
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****************************************************************************/
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void iob_dump(FAR const char *msg, FAR struct iob_s *iob, unsigned int len,
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unsigned int offset)
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{
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FAR struct iob_s *head;
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uint8_t data[32];
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unsigned int maxlen;
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unsigned int nbytes;
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unsigned int lndx;
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unsigned int cndx;
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head = iob;
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syslog(LOG_DEBUG, "%s: iob=%p pktlen=%d\n", msg, head, head->io_pktlen);
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/* Check if the offset is beyond the data in the I/O buffer chain */
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if (offset > head->io_pktlen)
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{
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nerr("ERROR: offset is past the end of data: %u > %u\n",
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offset, head->io_pktlen);
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return;
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}
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/* Dump I/O buffer headers */
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for (; iob; iob = iob->io_flink)
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{
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syslog(LOG_DEBUG, " iob=%p len=%d offset=%d\n",
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iob, iob->io_len, iob->io_offset);
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}
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/* Get the amount of data to be displayed, limited by the amount that we
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* have beyond the offset.
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*/
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maxlen = head->io_pktlen - offset;
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len = MIN(len, maxlen);
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/* Then beginning printing with the buffer containing the offset in groups
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* of 32 bytes.
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*/
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for (lndx = 0; lndx < len; lndx += 32, offset += 32)
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{
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/* Copy 32-bytes into our local buffer from the current offset */
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nbytes = iob_copyout(data, head, 32, offset);
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/* Make sure that we have something to print */
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if (nbytes > 0)
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{
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syslog(LOG_DEBUG, " %04x: ", offset);
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for (cndx = 0; cndx < 32; cndx++)
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{
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if (cndx == 16)
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{
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syslog(LOG_DEBUG, " ");
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}
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if ((lndx + cndx) < len)
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{
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syslog(LOG_DEBUG, "%02x", data[cndx]);
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}
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else
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{
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syslog(LOG_DEBUG, " ");
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}
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}
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syslog(LOG_DEBUG, " ");
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for (cndx = 0; cndx < 32; cndx++)
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{
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if (cndx == 16)
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{
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syslog(LOG_DEBUG, " ");
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}
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if ((lndx + cndx) < len)
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{
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if (data[cndx] >= 0x20 && data[cndx] < 0x7f)
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{
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syslog(LOG_DEBUG, "%c", data[cndx]);
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}
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else
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{
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syslog(LOG_DEBUG, ".");
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}
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}
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}
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syslog(LOG_DEBUG, "\n");
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}
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}
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}
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#endif /* CONFIG_DEBUG_FEATURES */
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