327 lines
9.3 KiB
C
327 lines
9.3 KiB
C
#ifndef __KERNEL__
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include <uthash/utstring.h>
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#include "log.h"
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static const char hex_asc[] = "0123456789abcdef";
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#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
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#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
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char* IHW_bin2hex(char *p, const unsigned char *cp, int count)
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{
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while (count) {
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unsigned char c = *cp++;
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/* put lowercase hex digits */
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*p++ = 0x20 | hex_asc[c >> 4];
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*p++ = 0x20 | hex_asc[c & 0xf];
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count--;
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}
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return p;
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}
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/**
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* hex_to_bin - convert a hex digit to its real value
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* @ch: ascii character represents hex digit
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*
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* hex_to_bin() converts one hex digit to its actual value or -1 in case of bad
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* input.
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*/
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int hex_to_bin(char ch)
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{
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if((ch >= '0') && (ch <= '9'))
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{
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return ch - '0';
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}
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ch = tolower(ch);
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if((ch >= 'a') && (ch <= 'f'))
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{
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return ch - 'a' + 10;
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}
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return -1;
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}
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/**
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* hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
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* @buf: data blob to dump
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* @len: number of bytes in the @buf
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* @rowsize: number of bytes to print per line; must be 16 or 32
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* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
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* @linebuf: where to put the converted data
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* @linebuflen: total size of @linebuf, including space for terminating NUL
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* @ascii: include ASCII after the hex output
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*
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* hex_dump_to_buffer() works on one "line" of output at a time, i.e.,
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* 16 or 32 bytes of input data converted to hex + ASCII output.
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*
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* Given a buffer of u8 data, hex_dump_to_buffer() converts the input data
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* to a hex + ASCII dump at the supplied memory location.
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* The converted output is always NUL-terminated.
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*
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* E.g.:
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* hex_dump_to_buffer(frame->data, frame->len, 16, 1,
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* linebuf, sizeof(linebuf), true);
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*
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* example output buffer:
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* 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO
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*/
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void hex_dump_to_buffer(const void* buf, int len, int rowsize,
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int groupsize, char* linebuf, size_t linebuflen,
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int ascii)
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{
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const unsigned char* ptr = (const unsigned char *)buf;
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unsigned char ch;
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int j, lx = 0;
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int ascii_column;
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if(rowsize != 16 && rowsize != 32)
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{
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rowsize = 16;
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}
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if(!len)
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{
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goto nil;
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}
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if(len > rowsize) /* limit to one line at a time */
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{
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len = rowsize;
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}
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if((len % groupsize) != 0) /* no mixed size output */
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{
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groupsize = 1;
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}
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switch(groupsize)
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{
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case 8:
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{
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const unsigned long long* ptr8 = (const unsigned long long *)buf;
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int ngroups = len / groupsize;
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for(j = 0; j < ngroups; j++)
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lx += snprintf(linebuf + lx, linebuflen - lx,
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"%s%16.16llx", j ? " " : "",
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(unsigned long long) * (ptr8 + j));
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ascii_column = 17 * ngroups + 2;
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break;
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}
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case 4:
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{
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const unsigned int* ptr4 = (const unsigned int *)buf;
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int ngroups = len / groupsize;
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for(j = 0; j < ngroups; j++)
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lx += snprintf(linebuf + lx, linebuflen - lx,
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"%s%8.8x", j ? " " : "", *(ptr4 + j));
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ascii_column = 9 * ngroups + 2;
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break;
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}
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case 2:
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{
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const unsigned short* ptr2 = (const unsigned short *)buf;
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int ngroups = len / groupsize;
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for(j = 0; j < ngroups; j++)
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lx += snprintf(linebuf + lx, linebuflen - lx,
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"%s%4.4x", j ? " " : "", *(ptr2 + j));
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ascii_column = 5 * ngroups + 2;
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break;
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}
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default:
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for(j = 0; (j < len) && (lx + 3) <= linebuflen; j++)
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{
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ch = ptr[j];
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linebuf[lx++] = hex_asc_hi(ch);
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linebuf[lx++] = hex_asc_lo(ch);
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linebuf[lx++] = ' ';
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}
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if(j)
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{
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lx--;
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}
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ascii_column = 3 * rowsize + 2;
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break;
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}
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if(!ascii)
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{
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goto nil;
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}
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while(lx < (linebuflen - 1) && lx < (ascii_column - 1))
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{
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linebuf[lx++] = ' ';
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}
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for(j = 0; (j < len) && (lx + 2) < linebuflen; j++)
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{
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ch = ptr[j];
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linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.';
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}
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nil:
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linebuf[lx++] = '\0';
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}
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/**
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* print_hex_dump - print a text hex dump to syslog for a binary blob of data
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* @level: kernel log level (e.g. KERN_DEBUG)
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* @prefix_str: string to prefix each line with;
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* caller supplies trailing spaces for alignment if desired
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* @prefix_type: controls whether prefix of an offset, address, or none
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* is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE)
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* @rowsize: number of bytes to print per line; must be 16 or 32
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* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
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* @buf: data blob to dump
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* @len: number of bytes in the @buf
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* @ascii: include ASCII after the hex output
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*
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* Given a buffer of u8 data, print_hex_dump() prints a hex + ASCII dump
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* to the kernel log at the specified kernel log level, with an optional
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* leading prefix.
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*
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* print_hex_dump() works on one "line" of output at a time, i.e.,
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* 16 or 32 bytes of input data converted to hex + ASCII output.
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* print_hex_dump() iterates over the entire input @buf, breaking it into
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* "line size" chunks to format and print.
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*
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* E.g.:
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* print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_ADDRESS,
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* 16, 1, frame->data, frame->len, true);
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*
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* Example output using %DUMP_PREFIX_OFFSET and 1-byte mode:
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* 0009ab42: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO
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* Example output using %DUMP_PREFIX_ADDRESS and 4-byte mode:
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* ffffffff88089af0: 73727170 77767574 7b7a7978 7f7e7d7c pqrstuvwxyz{|}~.
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*/
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void print_hex_dump(const char* prefix_str, int prefix_type,
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int rowsize, int groupsize,
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const void* buf, int len, int ascii)
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{
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const unsigned char* ptr = (const unsigned char *)buf;
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int i, remaining = len;
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unsigned char linebuf[32 * 3 + 2 + 32 + 1];
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if(rowsize != 16 && rowsize != 32)
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{
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rowsize = 16;
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}
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for(i = 0; i < len; i += rowsize)
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{
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int linelen = MIN(remaining, rowsize);
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remaining -= rowsize;
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hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
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(char *)linebuf, sizeof(linebuf), ascii);
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switch(prefix_type)
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{
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case DUMP_PREFIX_ADDRESS:
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print("%s%p: %s\n",
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prefix_str, ptr + i, linebuf);
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break;
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case DUMP_PREFIX_OFFSET:
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print("%s%.8x: %s\n", prefix_str, i, linebuf);
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break;
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default:
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print("%s%.8x: %s\n", prefix_str, i, linebuf);
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break;
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}
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}
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print("%s", "\n");
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}
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/**
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* print_hex_dump_bytes - shorthand form of print_hex_dump() with default params
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* @prefix_str: string to prefix each line with;
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* caller supplies trailing spaces for alignment if desired
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* @prefix_type: controls whether prefix of an offset, address, or none
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* is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE)
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* @buf: data blob to dump
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* @len: number of bytes in the @buf
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*
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* Calls print_hex_dump(), with log level of KERN_DEBUG,
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* rowsize of 16, groupsize of 1, and ASCII output included.
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*/
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void print_hex_dump_bytes(const char* prefix_str, int prefix_type,
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const void* buf, int len)
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{
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print_hex_dump(prefix_str, prefix_type, 16, 1,
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buf, len, 1);
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}
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const char* format_hex_buf(const char* prefix_str, int prefix_type,
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int rowsize, int groupsize,
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const void* buf, int len, int ascii)
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{
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UT_string* pLogStr = NULL;
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const char* pFormatStr;
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const unsigned char* ptr = (const unsigned char *)buf;
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int i, remaining = len;
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unsigned char linebuf[32 * 3 + 2 + 32 + 1];
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if(rowsize != 16 && rowsize != 32)
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{
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rowsize = 16;
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}
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utstring_new(pLogStr);
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for(i = 0; i < len; i += rowsize)
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{
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int linelen = MIN(remaining, rowsize);
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remaining -= rowsize;
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hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
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(char *)linebuf, sizeof(linebuf), ascii);
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switch(prefix_type)
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{
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case DUMP_PREFIX_ADDRESS:
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utstring_printf(pLogStr, "%s%p: %s\n",
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prefix_str, ptr + i, linebuf);
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break;
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case DUMP_PREFIX_OFFSET:
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utstring_printf(pLogStr, "%s%.8x: %s\n",
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prefix_str, i, linebuf);
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break;
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default:
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utstring_printf(pLogStr, "%s%.8x: %s\n",
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prefix_str, i, linebuf);
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break;
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}
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}
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pFormatStr = strdup(utstring_body(pLogStr));
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utstring_free(pLogStr);
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return pFormatStr;
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}
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#endif
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