The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that: (1) source code distributions |
| 7 | * retain the above copyright notice and this paragraph in its entirety, (2) |
| 8 | * distributions including binary code include the above copyright notice and |
| 9 | * this paragraph in its entirety in the documentation or other materials |
| 10 | * provided with the distribution, and (3) all advertising materials mentioning |
| 11 | * features or use of this software display the following acknowledgement: |
| 12 | * ``This product includes software developed by the University of California, |
| 13 | * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| 14 | * the University nor the names of its contributors may be used to endorse |
| 15 | * or promote products derived from this software without specific prior |
| 16 | * written permission. |
| 17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| 18 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 20 | */ |
| 21 | |
| 22 | #ifndef lint |
| 23 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 24 | "@(#) $Header: /tcpdump/master/tcpdump/util.c,v 1.109 2007-01-29 09:59:42 hannes Exp $ (LBL)"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 25 | #endif |
| 26 | |
| 27 | #ifdef HAVE_CONFIG_H |
| 28 | #include "config.h" |
| 29 | #endif |
| 30 | |
| 31 | #include <tcpdump-stdinc.h> |
| 32 | |
| 33 | #include <sys/stat.h> |
| 34 | |
| 35 | #include <errno.h> |
| 36 | #ifdef HAVE_FCNTL_H |
| 37 | #include <fcntl.h> |
| 38 | #endif |
| 39 | #include <pcap.h> |
| 40 | #include <stdio.h> |
| 41 | #include <stdarg.h> |
| 42 | #include <stdlib.h> |
| 43 | #include <string.h> |
| 44 | |
| 45 | #include "interface.h" |
| 46 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 47 | char * ts_format(register int, register int); |
| 48 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 49 | /* |
| 50 | * Print out a null-terminated filename (or other ascii string). |
| 51 | * If ep is NULL, assume no truncation check is needed. |
| 52 | * Return true if truncated. |
| 53 | */ |
| 54 | int |
| 55 | fn_print(register const u_char *s, register const u_char *ep) |
| 56 | { |
| 57 | register int ret; |
| 58 | register u_char c; |
| 59 | |
| 60 | ret = 1; /* assume truncated */ |
| 61 | while (ep == NULL || s < ep) { |
| 62 | c = *s++; |
| 63 | if (c == '\0') { |
| 64 | ret = 0; |
| 65 | break; |
| 66 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 67 | if (!ND_ISASCII(c)) { |
| 68 | c = ND_TOASCII(c); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 69 | putchar('M'); |
| 70 | putchar('-'); |
| 71 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 72 | if (!ND_ISPRINT(c)) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 73 | c ^= 0x40; /* DEL to ?, others to alpha */ |
| 74 | putchar('^'); |
| 75 | } |
| 76 | putchar(c); |
| 77 | } |
| 78 | return(ret); |
| 79 | } |
| 80 | |
| 81 | /* |
| 82 | * Print out a counted filename (or other ascii string). |
| 83 | * If ep is NULL, assume no truncation check is needed. |
| 84 | * Return true if truncated. |
| 85 | */ |
| 86 | int |
| 87 | fn_printn(register const u_char *s, register u_int n, |
| 88 | register const u_char *ep) |
| 89 | { |
| 90 | register u_char c; |
| 91 | |
| 92 | while (n > 0 && (ep == NULL || s < ep)) { |
| 93 | n--; |
| 94 | c = *s++; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 95 | if (!ND_ISASCII(c)) { |
| 96 | c = ND_TOASCII(c); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 97 | putchar('M'); |
| 98 | putchar('-'); |
| 99 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 100 | if (!ND_ISPRINT(c)) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 101 | c ^= 0x40; /* DEL to ?, others to alpha */ |
| 102 | putchar('^'); |
| 103 | } |
| 104 | putchar(c); |
| 105 | } |
| 106 | return (n == 0) ? 0 : 1; |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * Print out a null-padded filename (or other ascii string). |
| 111 | * If ep is NULL, assume no truncation check is needed. |
| 112 | * Return true if truncated. |
| 113 | */ |
| 114 | int |
| 115 | fn_printzp(register const u_char *s, register u_int n, |
| 116 | register const u_char *ep) |
| 117 | { |
| 118 | register int ret; |
| 119 | register u_char c; |
| 120 | |
| 121 | ret = 1; /* assume truncated */ |
| 122 | while (n > 0 && (ep == NULL || s < ep)) { |
| 123 | n--; |
| 124 | c = *s++; |
| 125 | if (c == '\0') { |
| 126 | ret = 0; |
| 127 | break; |
| 128 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 129 | if (!ND_ISASCII(c)) { |
| 130 | c = ND_TOASCII(c); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 131 | putchar('M'); |
| 132 | putchar('-'); |
| 133 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 134 | if (!ND_ISPRINT(c)) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 135 | c ^= 0x40; /* DEL to ?, others to alpha */ |
| 136 | putchar('^'); |
| 137 | } |
| 138 | putchar(c); |
| 139 | } |
| 140 | return (n == 0) ? 0 : ret; |
| 141 | } |
| 142 | |
| 143 | /* |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 144 | * Format the timestamp |
| 145 | */ |
| 146 | char * |
| 147 | ts_format(register int sec, register int usec) |
| 148 | { |
| 149 | static char buf[sizeof("00:00:00.000000")]; |
| 150 | (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d.%06u", |
| 151 | sec / 3600, (sec % 3600) / 60, sec % 60, usec); |
| 152 | |
| 153 | return buf; |
| 154 | } |
| 155 | |
| 156 | /* |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 157 | * Print the timestamp |
| 158 | */ |
| 159 | void |
| 160 | ts_print(register const struct timeval *tvp) |
| 161 | { |
| 162 | register int s; |
| 163 | struct tm *tm; |
| 164 | time_t Time; |
| 165 | static unsigned b_sec; |
| 166 | static unsigned b_usec; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 167 | int d_usec; |
| 168 | int d_sec; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 169 | |
| 170 | switch (tflag) { |
| 171 | |
| 172 | case 0: /* Default */ |
| 173 | s = (tvp->tv_sec + thiszone) % 86400; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 174 | (void)printf("%s ", ts_format(s, tvp->tv_usec)); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 175 | break; |
| 176 | |
| 177 | case 1: /* No time stamp */ |
| 178 | break; |
| 179 | |
| 180 | case 2: /* Unix timeval style */ |
| 181 | (void)printf("%u.%06u ", |
| 182 | (unsigned)tvp->tv_sec, |
| 183 | (unsigned)tvp->tv_usec); |
| 184 | break; |
| 185 | |
| 186 | case 3: /* Microseconds since previous packet */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 187 | case 5: /* Microseconds since first packet */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 188 | if (b_sec == 0) { |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 189 | /* init timestamp for first packet */ |
| 190 | b_usec = tvp->tv_usec; |
| 191 | b_sec = tvp->tv_sec; |
| 192 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 193 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 194 | d_usec = tvp->tv_usec - b_usec; |
| 195 | d_sec = tvp->tv_sec - b_sec; |
| 196 | |
| 197 | while (d_usec < 0) { |
| 198 | d_usec += 1000000; |
| 199 | d_sec--; |
| 200 | } |
| 201 | |
| 202 | (void)printf("%s ", ts_format(d_sec, d_usec)); |
| 203 | |
| 204 | if (tflag == 3) { /* set timestamp for last packet */ |
| 205 | b_sec = tvp->tv_sec; |
| 206 | b_usec = tvp->tv_usec; |
| 207 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 208 | break; |
| 209 | |
| 210 | case 4: /* Default + Date*/ |
| 211 | s = (tvp->tv_sec + thiszone) % 86400; |
| 212 | Time = (tvp->tv_sec + thiszone) - s; |
| 213 | tm = gmtime (&Time); |
| 214 | if (!tm) |
| 215 | printf("Date fail "); |
| 216 | else |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 217 | printf("%04d-%02d-%02d %s ", |
| 218 | tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday, |
| 219 | ts_format(s, tvp->tv_usec)); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 220 | break; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /* |
| 225 | * Print a relative number of seconds (e.g. hold time, prune timer) |
| 226 | * in the form 5m1s. This does no truncation, so 32230861 seconds |
| 227 | * is represented as 1y1w1d1h1m1s. |
| 228 | */ |
| 229 | void |
| 230 | relts_print(int secs) |
| 231 | { |
| 232 | static const char *lengths[] = {"y", "w", "d", "h", "m", "s"}; |
| 233 | static const int seconds[] = {31536000, 604800, 86400, 3600, 60, 1}; |
| 234 | const char **l = lengths; |
| 235 | const int *s = seconds; |
| 236 | |
| 237 | if (secs == 0) { |
| 238 | (void)printf("0s"); |
| 239 | return; |
| 240 | } |
| 241 | if (secs < 0) { |
| 242 | (void)printf("-"); |
| 243 | secs = -secs; |
| 244 | } |
| 245 | while (secs > 0) { |
| 246 | if (secs >= *s) { |
| 247 | (void)printf("%d%s", secs / *s, *l); |
| 248 | secs -= (secs / *s) * *s; |
| 249 | } |
| 250 | s++; |
| 251 | l++; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * this is a generic routine for printing unknown data; |
| 257 | * we pass on the linefeed plus indentation string to |
| 258 | * get a proper output - returns 0 on error |
| 259 | */ |
| 260 | |
| 261 | int |
| 262 | print_unknown_data(const u_char *cp,const char *ident,int len) |
| 263 | { |
| 264 | if (len < 0) { |
| 265 | printf("%sDissector error: print_unknown_data called with negative length", |
| 266 | ident); |
| 267 | return(0); |
| 268 | } |
| 269 | if (snapend - cp < len) |
| 270 | len = snapend - cp; |
| 271 | if (len < 0) { |
| 272 | printf("%sDissector error: print_unknown_data called with pointer past end of packet", |
| 273 | ident); |
| 274 | return(0); |
| 275 | } |
| 276 | hex_print(ident,cp,len); |
| 277 | return(1); /* everything is ok */ |
| 278 | } |
| 279 | |
| 280 | /* |
| 281 | * Convert a token value to a string; use "fmt" if not found. |
| 282 | */ |
| 283 | const char * |
| 284 | tok2strbuf(register const struct tok *lp, register const char *fmt, |
| 285 | register int v, char *buf, size_t bufsize) |
| 286 | { |
| 287 | if (lp != NULL) { |
| 288 | while (lp->s != NULL) { |
| 289 | if (lp->v == v) |
| 290 | return (lp->s); |
| 291 | ++lp; |
| 292 | } |
| 293 | } |
| 294 | if (fmt == NULL) |
| 295 | fmt = "#%d"; |
| 296 | |
| 297 | (void)snprintf(buf, bufsize, fmt, v); |
| 298 | return (const char *)buf; |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * Convert a token value to a string; use "fmt" if not found. |
| 303 | */ |
| 304 | const char * |
| 305 | tok2str(register const struct tok *lp, register const char *fmt, |
| 306 | register int v) |
| 307 | { |
| 308 | static char buf[4][128]; |
| 309 | static int idx = 0; |
| 310 | char *ret; |
| 311 | |
| 312 | ret = buf[idx]; |
| 313 | idx = (idx+1) & 3; |
| 314 | return tok2strbuf(lp, fmt, v, ret, sizeof(buf[0])); |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * Convert a bit token value to a string; use "fmt" if not found. |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 319 | * this is useful for parsing bitfields, the output strings are seperated |
| 320 | * if the s field is positive. |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 321 | */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 322 | static char * |
| 323 | bittok2str_internal(register const struct tok *lp, register const char *fmt, |
| 324 | register int v, register int sep) |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 325 | { |
| 326 | static char buf[256]; /* our stringbuffer */ |
| 327 | int buflen=0; |
| 328 | register int rotbit; /* this is the bit we rotate through all bitpositions */ |
| 329 | register int tokval; |
| 330 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 331 | while (lp != NULL && lp->s != NULL) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 332 | tokval=lp->v; /* load our first value */ |
| 333 | rotbit=1; |
| 334 | while (rotbit != 0) { |
| 335 | /* |
| 336 | * lets AND the rotating bit with our token value |
| 337 | * and see if we have got a match |
| 338 | */ |
| 339 | if (tokval == (v&rotbit)) { |
| 340 | /* ok we have found something */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 341 | buflen+=snprintf(buf+buflen, sizeof(buf)-buflen, "%s%s", |
| 342 | lp->s, sep ? ", " : ""); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 343 | break; |
| 344 | } |
| 345 | rotbit=rotbit<<1; /* no match - lets shift and try again */ |
| 346 | } |
| 347 | lp++; |
| 348 | } |
| 349 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 350 | /* user didn't want string seperation - no need to cut off trailing seperators */ |
| 351 | if (!sep) { |
| 352 | return (buf); |
| 353 | } |
| 354 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 355 | if (buflen != 0) { /* did we find anything */ |
| 356 | /* yep, set the the trailing zero 2 bytes before to eliminate the last comma & whitespace */ |
| 357 | buf[buflen-2] = '\0'; |
| 358 | return (buf); |
| 359 | } |
| 360 | else { |
| 361 | /* bummer - lets print the "unknown" message as advised in the fmt string if we got one */ |
| 362 | if (fmt == NULL) |
| 363 | fmt = "#%d"; |
| 364 | (void)snprintf(buf, sizeof(buf), fmt, v); |
| 365 | return (buf); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | /* |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 370 | * Convert a bit token value to a string; use "fmt" if not found. |
| 371 | * this is useful for parsing bitfields, the output strings are not seperated. |
| 372 | */ |
| 373 | char * |
| 374 | bittok2str_nosep(register const struct tok *lp, register const char *fmt, |
| 375 | register int v) |
| 376 | { |
| 377 | return (bittok2str_internal(lp, fmt, v, 0)); |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * Convert a bit token value to a string; use "fmt" if not found. |
| 382 | * this is useful for parsing bitfields, the output strings are comma seperated. |
| 383 | */ |
| 384 | char * |
| 385 | bittok2str(register const struct tok *lp, register const char *fmt, |
| 386 | register int v) |
| 387 | { |
| 388 | return (bittok2str_internal(lp, fmt, v, 1)); |
| 389 | } |
| 390 | |
| 391 | /* |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 392 | * Convert a value to a string using an array; the macro |
| 393 | * tok2strary() in <interface.h> is the public interface to |
| 394 | * this function and ensures that the second argument is |
| 395 | * correct for bounds-checking. |
| 396 | */ |
| 397 | const char * |
| 398 | tok2strary_internal(register const char **lp, int n, register const char *fmt, |
| 399 | register int v) |
| 400 | { |
| 401 | static char buf[128]; |
| 402 | |
| 403 | if (v >= 0 && v < n && lp[v] != NULL) |
| 404 | return lp[v]; |
| 405 | if (fmt == NULL) |
| 406 | fmt = "#%d"; |
| 407 | (void)snprintf(buf, sizeof(buf), fmt, v); |
| 408 | return (buf); |
| 409 | } |
| 410 | |
| 411 | /* |
| 412 | * Convert a 32-bit netmask to prefixlen if possible |
| 413 | * the function returns the prefix-len; if plen == -1 |
| 414 | * then conversion was not possible; |
| 415 | */ |
| 416 | |
| 417 | int |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 418 | mask2plen(u_int32_t mask) |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 419 | { |
| 420 | u_int32_t bitmasks[33] = { |
| 421 | 0x00000000, |
| 422 | 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000, |
| 423 | 0xf8000000, 0xfc000000, 0xfe000000, 0xff000000, |
| 424 | 0xff800000, 0xffc00000, 0xffe00000, 0xfff00000, |
| 425 | 0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000, |
| 426 | 0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000, |
| 427 | 0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00, |
| 428 | 0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0, |
| 429 | 0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff |
| 430 | }; |
| 431 | int prefix_len = 32; |
| 432 | |
| 433 | /* let's see if we can transform the mask into a prefixlen */ |
| 434 | while (prefix_len >= 0) { |
| 435 | if (bitmasks[prefix_len] == mask) |
| 436 | break; |
| 437 | prefix_len--; |
| 438 | } |
| 439 | return (prefix_len); |
| 440 | } |
| 441 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 442 | #ifdef INET6 |
| 443 | int |
| 444 | mask62plen(const u_char *mask) |
| 445 | { |
| 446 | u_char bitmasks[9] = { |
| 447 | 0x00, |
| 448 | 0x80, 0xc0, 0xe0, 0xf0, |
| 449 | 0xf8, 0xfc, 0xfe, 0xff |
| 450 | }; |
| 451 | int byte; |
| 452 | int cidr_len = 0; |
| 453 | |
| 454 | for (byte = 0; byte < 16; byte++) { |
| 455 | u_int bits; |
| 456 | |
| 457 | for (bits = 0; bits < (sizeof (bitmasks) / sizeof (bitmasks[0])); bits++) { |
| 458 | if (mask[byte] == bitmasks[bits]) { |
| 459 | cidr_len += bits; |
| 460 | break; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | if (mask[byte] != 0xff) |
| 465 | break; |
| 466 | } |
| 467 | return (cidr_len); |
| 468 | } |
| 469 | #endif /* INET6 */ |
| 470 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 471 | /* VARARGS */ |
| 472 | void |
| 473 | error(const char *fmt, ...) |
| 474 | { |
| 475 | va_list ap; |
| 476 | |
| 477 | (void)fprintf(stderr, "%s: ", program_name); |
| 478 | va_start(ap, fmt); |
| 479 | (void)vfprintf(stderr, fmt, ap); |
| 480 | va_end(ap); |
| 481 | if (*fmt) { |
| 482 | fmt += strlen(fmt); |
| 483 | if (fmt[-1] != '\n') |
| 484 | (void)fputc('\n', stderr); |
| 485 | } |
| 486 | exit(1); |
| 487 | /* NOTREACHED */ |
| 488 | } |
| 489 | |
| 490 | /* VARARGS */ |
| 491 | void |
| 492 | warning(const char *fmt, ...) |
| 493 | { |
| 494 | va_list ap; |
| 495 | |
| 496 | (void)fprintf(stderr, "%s: WARNING: ", program_name); |
| 497 | va_start(ap, fmt); |
| 498 | (void)vfprintf(stderr, fmt, ap); |
| 499 | va_end(ap); |
| 500 | if (*fmt) { |
| 501 | fmt += strlen(fmt); |
| 502 | if (fmt[-1] != '\n') |
| 503 | (void)fputc('\n', stderr); |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | /* |
| 508 | * Copy arg vector into a new buffer, concatenating arguments with spaces. |
| 509 | */ |
| 510 | char * |
| 511 | copy_argv(register char **argv) |
| 512 | { |
| 513 | register char **p; |
| 514 | register u_int len = 0; |
| 515 | char *buf; |
| 516 | char *src, *dst; |
| 517 | |
| 518 | p = argv; |
| 519 | if (*p == 0) |
| 520 | return 0; |
| 521 | |
| 522 | while (*p) |
| 523 | len += strlen(*p++) + 1; |
| 524 | |
| 525 | buf = (char *)malloc(len); |
| 526 | if (buf == NULL) |
| 527 | error("copy_argv: malloc"); |
| 528 | |
| 529 | p = argv; |
| 530 | dst = buf; |
| 531 | while ((src = *p++) != NULL) { |
| 532 | while ((*dst++ = *src++) != '\0') |
| 533 | ; |
| 534 | dst[-1] = ' '; |
| 535 | } |
| 536 | dst[-1] = '\0'; |
| 537 | |
| 538 | return buf; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * On Windows, we need to open the file in binary mode, so that |
| 543 | * we get all the bytes specified by the size we get from "fstat()". |
| 544 | * On UNIX, that's not necessary. O_BINARY is defined on Windows; |
| 545 | * we define it as 0 if it's not defined, so it does nothing. |
| 546 | */ |
| 547 | #ifndef O_BINARY |
| 548 | #define O_BINARY 0 |
| 549 | #endif |
| 550 | |
| 551 | char * |
| 552 | read_infile(char *fname) |
| 553 | { |
| 554 | register int i, fd, cc; |
| 555 | register char *cp; |
| 556 | struct stat buf; |
| 557 | |
| 558 | fd = open(fname, O_RDONLY|O_BINARY); |
| 559 | if (fd < 0) |
| 560 | error("can't open %s: %s", fname, pcap_strerror(errno)); |
| 561 | |
| 562 | if (fstat(fd, &buf) < 0) |
| 563 | error("can't stat %s: %s", fname, pcap_strerror(errno)); |
| 564 | |
| 565 | cp = malloc((u_int)buf.st_size + 1); |
| 566 | if (cp == NULL) |
| 567 | error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1, |
| 568 | fname, pcap_strerror(errno)); |
| 569 | cc = read(fd, cp, (u_int)buf.st_size); |
| 570 | if (cc < 0) |
| 571 | error("read %s: %s", fname, pcap_strerror(errno)); |
| 572 | if (cc != buf.st_size) |
| 573 | error("short read %s (%d != %d)", fname, cc, (int)buf.st_size); |
| 574 | |
| 575 | close(fd); |
| 576 | /* replace "# comment" with spaces */ |
| 577 | for (i = 0; i < cc; i++) { |
| 578 | if (cp[i] == '#') |
| 579 | while (i < cc && cp[i] != '\n') |
| 580 | cp[i++] = ' '; |
| 581 | } |
| 582 | cp[cc] = '\0'; |
| 583 | return (cp); |
| 584 | } |
| 585 | |
| 586 | void |
| 587 | safeputs(const char *s, int maxlen) |
| 588 | { |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 589 | int idx = 0; |
| 590 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 591 | while (*s && idx < maxlen) { |
| 592 | safeputchar(*s); |
| 593 | idx++; |
| 594 | s++; |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | void |
| 599 | safeputchar(int c) |
| 600 | { |
| 601 | unsigned char ch; |
| 602 | |
| 603 | ch = (unsigned char)(c & 0xff); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 604 | if (ch < 0x80 && ND_ISPRINT(ch)) |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 605 | printf("%c", ch); |
| 606 | else |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 607 | printf("\\0x%02x", ch); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 608 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 609 | |
| 610 | #ifdef LBL_ALIGN |
| 611 | /* |
| 612 | * Some compilers try to optimize memcpy(), using the alignment constraint |
| 613 | * on the argument pointer type. by using this function, we try to avoid the |
| 614 | * optimization. |
| 615 | */ |
| 616 | void |
| 617 | unaligned_memcpy(void *p, const void *q, size_t l) |
| 618 | { |
| 619 | memcpy(p, q, l); |
| 620 | } |
| 621 | |
| 622 | /* As with memcpy(), so with memcmp(). */ |
| 623 | int |
| 624 | unaligned_memcmp(const void *p, const void *q, size_t l) |
| 625 | { |
| 626 | return (memcmp(p, q, l)); |
| 627 | } |
| 628 | #endif |