diff options
Diffstat (limited to 'nuttx/net/iob/iob_dump.c')
| -rw-r--r-- | nuttx/net/iob/iob_dump.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/nuttx/net/iob/iob_dump.c b/nuttx/net/iob/iob_dump.c new file mode 100644 index 000000000..ee7cda4e3 --- /dev/null +++ b/nuttx/net/iob/iob_dump.c @@ -0,0 +1,180 @@ +/**************************************************************************** + * net/iob/iob_dump.c + * + * Copyright (C) 2014 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "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 + * COPYRIGHT OWNER OR CONTRIBUTORS 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <debug.h> + +#include <nuttx/net/iob.h> + +#ifdef CONFIG_DEBUG + +/**************************************************************************** + * Pre-processor definitions + ****************************************************************************/ + + #ifndef MIN +# define MIN(a,b) ((a) < (b) ? (a) : (b)) +#endif + +/* Select the lowest level debug interface available */ + +#ifdef CONFIG_CPP_HAVE_VARARGS +# ifdef CONFIG_ARCH_LOWPUTC +# define message(format, ...) lowsyslog(format, ##__VA_ARGS__) +# else +# define message(format, ...) syslog(format, ##__VA_ARGS__) +# endif +#else +# ifdef CONFIG_ARCH_LOWPUTC +# define message lowsyslog +# else +# define message syslog +# endif +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: iob_dump + * + * Description: + * Dump the contents of a I/O buffer chain + * + ****************************************************************************/ + +void iob_dump(FAR const char *msg, FAR struct iob_s *iob, unsigned int len, + unsigned int offset) +{ + FAR struct iob_s *head; + uint8_t data[32]; + unsigned int maxlen; + unsigned int nbytes; + unsigned int lndx; + unsigned int cndx; + + head = iob; + message("%s: iob=%p pktlen=%d\n", msg, head, head->io_pktlen); + + /* Check if the offset is beyond the data in the I/O buffer chain */ + + if (offset > head->io_pktlen) + { + ndbg("ERROR: offset is past the end of data: %u > %u\n", + offset, head->io_pktlen); + return; + } + + /* Dump I/O buffer headers */ + + for (; iob; iob = iob->io_flink) + { + message(" iob=%p len=%d offset=%d\n", iob, iob->io_len, iob->io_offset); + } + + /* Get the amount of data to be displayed, limited by the amount that we + * have beyond the offset. + */ + + maxlen = head->io_pktlen - offset; + len = MIN(len, maxlen); + + /* Then beginning printing with the buffer containing the offset in groups + * of 32 bytes. + */ + + for (lndx = 0; lndx < len; lndx += 32, offset += 32) + { + /* Copy 32-bytes into our local buffer from the current offset */ + + nbytes = iob_copyout(data, head, 32, offset); + + /* Make sure that we have something to print */ + + if (nbytes > 0) + { + message(" %04x: ", offset); + + for (cndx = 0; cndx < 32; cndx++) + { + if (cndx == 16) + { + message(" "); + } + + if ((lndx + cndx) < len) + { + message("%02x", data[cndx]); + } + else + { + message(" "); + } + } + + message(" "); + for (cndx = 0; cndx < 32; cndx++) + { + if (cndx == 16) + { + message(" "); + } + + if ((lndx + cndx) < len) + { + if (data[cndx] >= 0x20 && data[cndx] < 0x7f) + { + message("%c", data[cndx]); + } + else + { + message("."); + } + } + } + + message("\n"); + } + } +} + +#endif /* CONFIG_DEBUG */ |