FreeCalypso > hg > freecalypso-tools

annotate rvinterf/libprint/hexdump.c @ 953:ab54957dbe35

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libpwon: implement -Petmoff mode
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 07 Jun 2023 20:06:12 +0000
parents 65953c172f24
children
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928
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1 /*
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2 * The function contained in this module implements hex dump functionality:
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3 * an arbitrary binary packet is dumped in hex, line by line, calling an output
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4 * function for each line.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <stdio.h>
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9 #include <string.h>
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10 #include <strings.h>
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11
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12 void
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13 packet_hex_dump(src, srclen, outfunc)
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14 u_char *src;
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15 unsigned srclen;
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16 void (*outfunc)();
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17 {
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18 u_char *sp = src;
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19 unsigned remain = srclen;
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20 unsigned offset = 0;
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21 unsigned chunk;
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22 char line[80], *dp;
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23 int i, c;
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24
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25 while (remain) {
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26 sprintf(line, "%04X: ", offset);
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27 dp = line + 7;
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28 chunk = remain;
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29 if (chunk > 16)
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30 chunk = 16;
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31 for (i = 0; i < 16; i++) {
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32 if (i < chunk)
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33 sprintf(dp, "%02X ", sp[i]);
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34 else
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35 strcpy(dp, " ");
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36 dp += 3;
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37 if (i == 7 || i == 15)
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38 *dp++ = ' ';
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39 }
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40 for (i = 0; i < chunk; i++) {
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41 c = sp[i];
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42 if (c < ' ' || c > '~')
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43 c = '.';
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44 *dp++ = c;
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45 }
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46 *dp = '\0';
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47 outfunc(line);
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48 sp += chunk;
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49 remain -= chunk;
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50 offset += chunk;
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51 }
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52 }