Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1 | /* |
| 2 | * General purpose functions. |
| 3 | * |
Willy Tarreau | 348238b | 2010-01-18 15:05:57 +0100 | [diff] [blame] | 4 | * Copyright 2000-2010 Willy Tarreau <w@1wt.eu> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
Willy Tarreau | 2e74c3f | 2007-12-02 18:45:09 +0100 | [diff] [blame] | 13 | #include <ctype.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 14 | #include <netdb.h> |
Willy Tarreau | 9a7bea5 | 2012-04-27 11:16:50 +0200 | [diff] [blame] | 15 | #include <stdarg.h> |
Willy Tarreau | dd2f85e | 2012-09-02 22:34:23 +0200 | [diff] [blame] | 16 | #include <stdio.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 17 | #include <stdlib.h> |
| 18 | #include <string.h> |
Willy Tarreau | 127f966 | 2007-12-06 00:53:51 +0100 | [diff] [blame] | 19 | #include <sys/socket.h> |
| 20 | #include <sys/un.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 21 | #include <netinet/in.h> |
| 22 | #include <arpa/inet.h> |
| 23 | |
Willy Tarreau | e3ba5f0 | 2006-06-29 18:54:54 +0200 | [diff] [blame] | 24 | #include <common/config.h> |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 25 | #include <common/standard.h> |
Willy Tarreau | 45cb4fb | 2009-10-26 21:10:04 +0100 | [diff] [blame] | 26 | #include <eb32tree.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 27 | |
Willy Tarreau | 56adcf2 | 2012-12-23 18:00:29 +0100 | [diff] [blame] | 28 | /* enough to store NB_ITOA_STR integers of : |
Willy Tarreau | 72d759c | 2007-10-25 12:14:10 +0200 | [diff] [blame] | 29 | * 2^64-1 = 18446744073709551615 or |
| 30 | * -2^63 = -9223372036854775808 |
Willy Tarreau | e7239b5 | 2009-03-29 13:41:58 +0200 | [diff] [blame] | 31 | * |
| 32 | * The HTML version needs room for adding the 25 characters |
| 33 | * '<span class="rls"></span>' around digits at positions 3N+1 in order |
| 34 | * to add spacing at up to 6 positions : 18 446 744 073 709 551 615 |
Willy Tarreau | 72d759c | 2007-10-25 12:14:10 +0200 | [diff] [blame] | 35 | */ |
Willy Tarreau | 56adcf2 | 2012-12-23 18:00:29 +0100 | [diff] [blame] | 36 | char itoa_str[NB_ITOA_STR][171]; |
| 37 | int itoa_idx = 0; /* index of next itoa_str to use */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 38 | |
| 39 | /* |
William Lallemand | e7340ec | 2012-01-24 11:15:39 +0100 | [diff] [blame] | 40 | * unsigned long long ASCII representation |
| 41 | * |
| 42 | * return the last char '\0' or NULL if no enough |
| 43 | * space in dst |
| 44 | */ |
| 45 | char *ulltoa(unsigned long long n, char *dst, size_t size) |
| 46 | { |
| 47 | int i = 0; |
| 48 | char *res; |
| 49 | |
| 50 | switch(n) { |
| 51 | case 1ULL ... 9ULL: |
| 52 | i = 0; |
| 53 | break; |
| 54 | |
| 55 | case 10ULL ... 99ULL: |
| 56 | i = 1; |
| 57 | break; |
| 58 | |
| 59 | case 100ULL ... 999ULL: |
| 60 | i = 2; |
| 61 | break; |
| 62 | |
| 63 | case 1000ULL ... 9999ULL: |
| 64 | i = 3; |
| 65 | break; |
| 66 | |
| 67 | case 10000ULL ... 99999ULL: |
| 68 | i = 4; |
| 69 | break; |
| 70 | |
| 71 | case 100000ULL ... 999999ULL: |
| 72 | i = 5; |
| 73 | break; |
| 74 | |
| 75 | case 1000000ULL ... 9999999ULL: |
| 76 | i = 6; |
| 77 | break; |
| 78 | |
| 79 | case 10000000ULL ... 99999999ULL: |
| 80 | i = 7; |
| 81 | break; |
| 82 | |
| 83 | case 100000000ULL ... 999999999ULL: |
| 84 | i = 8; |
| 85 | break; |
| 86 | |
| 87 | case 1000000000ULL ... 9999999999ULL: |
| 88 | i = 9; |
| 89 | break; |
| 90 | |
| 91 | case 10000000000ULL ... 99999999999ULL: |
| 92 | i = 10; |
| 93 | break; |
| 94 | |
| 95 | case 100000000000ULL ... 999999999999ULL: |
| 96 | i = 11; |
| 97 | break; |
| 98 | |
| 99 | case 1000000000000ULL ... 9999999999999ULL: |
| 100 | i = 12; |
| 101 | break; |
| 102 | |
| 103 | case 10000000000000ULL ... 99999999999999ULL: |
| 104 | i = 13; |
| 105 | break; |
| 106 | |
| 107 | case 100000000000000ULL ... 999999999999999ULL: |
| 108 | i = 14; |
| 109 | break; |
| 110 | |
| 111 | case 1000000000000000ULL ... 9999999999999999ULL: |
| 112 | i = 15; |
| 113 | break; |
| 114 | |
| 115 | case 10000000000000000ULL ... 99999999999999999ULL: |
| 116 | i = 16; |
| 117 | break; |
| 118 | |
| 119 | case 100000000000000000ULL ... 999999999999999999ULL: |
| 120 | i = 17; |
| 121 | break; |
| 122 | |
| 123 | case 1000000000000000000ULL ... 9999999999999999999ULL: |
| 124 | i = 18; |
| 125 | break; |
| 126 | |
| 127 | case 10000000000000000000ULL ... ULLONG_MAX: |
| 128 | i = 19; |
| 129 | break; |
| 130 | } |
| 131 | if (i + 2 > size) // (i + 1) + '\0' |
| 132 | return NULL; // too long |
| 133 | res = dst + i + 1; |
| 134 | *res = '\0'; |
| 135 | for (; i >= 0; i--) { |
| 136 | dst[i] = n % 10ULL + '0'; |
| 137 | n /= 10ULL; |
| 138 | } |
| 139 | return res; |
| 140 | } |
| 141 | |
| 142 | /* |
| 143 | * unsigned long ASCII representation |
| 144 | * |
| 145 | * return the last char '\0' or NULL if no enough |
| 146 | * space in dst |
| 147 | */ |
| 148 | char *ultoa_o(unsigned long n, char *dst, size_t size) |
| 149 | { |
| 150 | int i = 0; |
| 151 | char *res; |
| 152 | |
| 153 | switch (n) { |
| 154 | case 0U ... 9UL: |
| 155 | i = 0; |
| 156 | break; |
| 157 | |
| 158 | case 10U ... 99UL: |
| 159 | i = 1; |
| 160 | break; |
| 161 | |
| 162 | case 100U ... 999UL: |
| 163 | i = 2; |
| 164 | break; |
| 165 | |
| 166 | case 1000U ... 9999UL: |
| 167 | i = 3; |
| 168 | break; |
| 169 | |
| 170 | case 10000U ... 99999UL: |
| 171 | i = 4; |
| 172 | break; |
| 173 | |
| 174 | case 100000U ... 999999UL: |
| 175 | i = 5; |
| 176 | break; |
| 177 | |
| 178 | case 1000000U ... 9999999UL: |
| 179 | i = 6; |
| 180 | break; |
| 181 | |
| 182 | case 10000000U ... 99999999UL: |
| 183 | i = 7; |
| 184 | break; |
| 185 | |
| 186 | case 100000000U ... 999999999UL: |
| 187 | i = 8; |
| 188 | break; |
| 189 | #if __WORDSIZE == 32 |
| 190 | |
| 191 | case 1000000000ULL ... ULONG_MAX: |
| 192 | i = 9; |
| 193 | break; |
| 194 | |
| 195 | #elif __WORDSIZE == 64 |
| 196 | |
| 197 | case 1000000000ULL ... 9999999999UL: |
| 198 | i = 9; |
| 199 | break; |
| 200 | |
| 201 | case 10000000000ULL ... 99999999999UL: |
| 202 | i = 10; |
| 203 | break; |
| 204 | |
| 205 | case 100000000000ULL ... 999999999999UL: |
| 206 | i = 11; |
| 207 | break; |
| 208 | |
| 209 | case 1000000000000ULL ... 9999999999999UL: |
| 210 | i = 12; |
| 211 | break; |
| 212 | |
| 213 | case 10000000000000ULL ... 99999999999999UL: |
| 214 | i = 13; |
| 215 | break; |
| 216 | |
| 217 | case 100000000000000ULL ... 999999999999999UL: |
| 218 | i = 14; |
| 219 | break; |
| 220 | |
| 221 | case 1000000000000000ULL ... 9999999999999999UL: |
| 222 | i = 15; |
| 223 | break; |
| 224 | |
| 225 | case 10000000000000000ULL ... 99999999999999999UL: |
| 226 | i = 16; |
| 227 | break; |
| 228 | |
| 229 | case 100000000000000000ULL ... 999999999999999999UL: |
| 230 | i = 17; |
| 231 | break; |
| 232 | |
| 233 | case 1000000000000000000ULL ... 9999999999999999999UL: |
| 234 | i = 18; |
| 235 | break; |
| 236 | |
| 237 | case 10000000000000000000ULL ... ULONG_MAX: |
| 238 | i = 19; |
| 239 | break; |
| 240 | |
| 241 | #endif |
| 242 | } |
| 243 | if (i + 2 > size) // (i + 1) + '\0' |
| 244 | return NULL; // too long |
| 245 | res = dst + i + 1; |
| 246 | *res = '\0'; |
| 247 | for (; i >= 0; i--) { |
| 248 | dst[i] = n % 10U + '0'; |
| 249 | n /= 10U; |
| 250 | } |
| 251 | return res; |
| 252 | } |
| 253 | |
| 254 | /* |
| 255 | * signed long ASCII representation |
| 256 | * |
| 257 | * return the last char '\0' or NULL if no enough |
| 258 | * space in dst |
| 259 | */ |
| 260 | char *ltoa_o(long int n, char *dst, size_t size) |
| 261 | { |
| 262 | char *pos = dst; |
| 263 | |
| 264 | if (n < 0) { |
| 265 | if (size < 3) |
| 266 | return NULL; // min size is '-' + digit + '\0' but another test in ultoa |
| 267 | *pos = '-'; |
| 268 | pos++; |
| 269 | dst = ultoa_o(-n, pos, size - 1); |
| 270 | } else { |
| 271 | dst = ultoa_o(n, dst, size); |
| 272 | } |
| 273 | return dst; |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | * signed long long ASCII representation |
| 278 | * |
| 279 | * return the last char '\0' or NULL if no enough |
| 280 | * space in dst |
| 281 | */ |
| 282 | char *lltoa(long long n, char *dst, size_t size) |
| 283 | { |
| 284 | char *pos = dst; |
| 285 | |
| 286 | if (n < 0) { |
| 287 | if (size < 3) |
| 288 | return NULL; // min size is '-' + digit + '\0' but another test in ulltoa |
| 289 | *pos = '-'; |
| 290 | pos++; |
| 291 | dst = ulltoa(-n, pos, size - 1); |
| 292 | } else { |
| 293 | dst = ulltoa(n, dst, size); |
| 294 | } |
| 295 | return dst; |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * write a ascii representation of a unsigned into dst, |
| 300 | * return a pointer to the last character |
| 301 | * Pad the ascii representation with '0', using size. |
| 302 | */ |
| 303 | char *utoa_pad(unsigned int n, char *dst, size_t size) |
| 304 | { |
| 305 | int i = 0; |
| 306 | char *ret; |
| 307 | |
| 308 | switch(n) { |
| 309 | case 0U ... 9U: |
| 310 | i = 0; |
| 311 | break; |
| 312 | |
| 313 | case 10U ... 99U: |
| 314 | i = 1; |
| 315 | break; |
| 316 | |
| 317 | case 100U ... 999U: |
| 318 | i = 2; |
| 319 | break; |
| 320 | |
| 321 | case 1000U ... 9999U: |
| 322 | i = 3; |
| 323 | break; |
| 324 | |
| 325 | case 10000U ... 99999U: |
| 326 | i = 4; |
| 327 | break; |
| 328 | |
| 329 | case 100000U ... 999999U: |
| 330 | i = 5; |
| 331 | break; |
| 332 | |
| 333 | case 1000000U ... 9999999U: |
| 334 | i = 6; |
| 335 | break; |
| 336 | |
| 337 | case 10000000U ... 99999999U: |
| 338 | i = 7; |
| 339 | break; |
| 340 | |
| 341 | case 100000000U ... 999999999U: |
| 342 | i = 8; |
| 343 | break; |
| 344 | |
| 345 | case 1000000000U ... 4294967295U: |
| 346 | i = 9; |
| 347 | break; |
| 348 | } |
| 349 | if (i + 2 > size) // (i + 1) + '\0' |
| 350 | return NULL; // too long |
| 351 | if (i < size) |
| 352 | i = size - 2; // padding - '\0' |
| 353 | |
| 354 | ret = dst + i + 1; |
| 355 | *ret = '\0'; |
| 356 | for (; i >= 0; i--) { |
| 357 | dst[i] = n % 10U + '0'; |
| 358 | n /= 10U; |
| 359 | } |
| 360 | return ret; |
| 361 | } |
| 362 | |
| 363 | /* |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 364 | * copies at most <size-1> chars from <src> to <dst>. Last char is always |
| 365 | * set to 0, unless <size> is 0. The number of chars copied is returned |
| 366 | * (excluding the terminating zero). |
| 367 | * This code has been optimized for size and speed : on x86, it's 45 bytes |
| 368 | * long, uses only registers, and consumes only 4 cycles per char. |
| 369 | */ |
| 370 | int strlcpy2(char *dst, const char *src, int size) |
| 371 | { |
| 372 | char *orig = dst; |
| 373 | if (size) { |
| 374 | while (--size && (*dst = *src)) { |
| 375 | src++; dst++; |
| 376 | } |
| 377 | *dst = 0; |
| 378 | } |
| 379 | return dst - orig; |
| 380 | } |
| 381 | |
| 382 | /* |
Willy Tarreau | 72d759c | 2007-10-25 12:14:10 +0200 | [diff] [blame] | 383 | * This function simply returns a locally allocated string containing |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 384 | * the ascii representation for number 'n' in decimal. |
| 385 | */ |
Emeric Brun | 3a7fce5 | 2010-01-04 14:54:38 +0100 | [diff] [blame] | 386 | char *ultoa_r(unsigned long n, char *buffer, int size) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 387 | { |
| 388 | char *pos; |
| 389 | |
Willy Tarreau | 72d759c | 2007-10-25 12:14:10 +0200 | [diff] [blame] | 390 | pos = buffer + size - 1; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 391 | *pos-- = '\0'; |
| 392 | |
| 393 | do { |
| 394 | *pos-- = '0' + n % 10; |
| 395 | n /= 10; |
Willy Tarreau | 72d759c | 2007-10-25 12:14:10 +0200 | [diff] [blame] | 396 | } while (n && pos >= buffer); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 397 | return pos + 1; |
| 398 | } |
| 399 | |
Willy Tarreau | 91092e5 | 2007-10-25 16:58:42 +0200 | [diff] [blame] | 400 | /* |
Willy Tarreau | e7239b5 | 2009-03-29 13:41:58 +0200 | [diff] [blame] | 401 | * This function simply returns a locally allocated string containing |
| 402 | * the ascii representation for number 'n' in decimal, formatted for |
| 403 | * HTML output with tags to create visual grouping by 3 digits. The |
| 404 | * output needs to support at least 171 characters. |
| 405 | */ |
| 406 | const char *ulltoh_r(unsigned long long n, char *buffer, int size) |
| 407 | { |
| 408 | char *start; |
| 409 | int digit = 0; |
| 410 | |
| 411 | start = buffer + size; |
| 412 | *--start = '\0'; |
| 413 | |
| 414 | do { |
| 415 | if (digit == 3 && start >= buffer + 7) |
| 416 | memcpy(start -= 7, "</span>", 7); |
| 417 | |
| 418 | if (start >= buffer + 1) { |
| 419 | *--start = '0' + n % 10; |
| 420 | n /= 10; |
| 421 | } |
| 422 | |
| 423 | if (digit == 3 && start >= buffer + 18) |
| 424 | memcpy(start -= 18, "<span class=\"rls\">", 18); |
| 425 | |
| 426 | if (digit++ == 3) |
| 427 | digit = 1; |
| 428 | } while (n && start > buffer); |
| 429 | return start; |
| 430 | } |
| 431 | |
| 432 | /* |
Willy Tarreau | 91092e5 | 2007-10-25 16:58:42 +0200 | [diff] [blame] | 433 | * This function simply returns a locally allocated string containing the ascii |
| 434 | * representation for number 'n' in decimal, unless n is 0 in which case it |
| 435 | * returns the alternate string (or an empty string if the alternate string is |
| 436 | * NULL). It use is intended for limits reported in reports, where it's |
| 437 | * desirable not to display anything if there is no limit. Warning! it shares |
| 438 | * the same vector as ultoa_r(). |
| 439 | */ |
| 440 | const char *limit_r(unsigned long n, char *buffer, int size, const char *alt) |
| 441 | { |
| 442 | return (n) ? ultoa_r(n, buffer, size) : (alt ? alt : ""); |
| 443 | } |
| 444 | |
Robert Tsai | 81ae195 | 2007-12-05 10:47:29 +0100 | [diff] [blame] | 445 | /* |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 446 | * Returns non-zero if character <s> is a hex digit (0-9, a-f, A-F), else zero. |
| 447 | * |
| 448 | * It looks like this one would be a good candidate for inlining, but this is |
| 449 | * not interesting because it around 35 bytes long and often called multiple |
| 450 | * times within the same function. |
| 451 | */ |
| 452 | int ishex(char s) |
| 453 | { |
| 454 | s -= '0'; |
| 455 | if ((unsigned char)s <= 9) |
| 456 | return 1; |
| 457 | s -= 'A' - '0'; |
| 458 | if ((unsigned char)s <= 5) |
| 459 | return 1; |
| 460 | s -= 'a' - 'A'; |
| 461 | if ((unsigned char)s <= 5) |
| 462 | return 1; |
| 463 | return 0; |
| 464 | } |
| 465 | |
Willy Tarreau | 2e74c3f | 2007-12-02 18:45:09 +0100 | [diff] [blame] | 466 | /* |
| 467 | * Checks <name> for invalid characters. Valid chars are [A-Za-z0-9_:.-]. If an |
| 468 | * invalid character is found, a pointer to it is returned. If everything is |
| 469 | * fine, NULL is returned. |
| 470 | */ |
| 471 | const char *invalid_char(const char *name) |
| 472 | { |
| 473 | if (!*name) |
| 474 | return name; |
| 475 | |
| 476 | while (*name) { |
Willy Tarreau | 88e0581 | 2010-03-03 00:16:00 +0100 | [diff] [blame] | 477 | if (!isalnum((int)(unsigned char)*name) && *name != '.' && *name != ':' && |
Willy Tarreau | 2e74c3f | 2007-12-02 18:45:09 +0100 | [diff] [blame] | 478 | *name != '_' && *name != '-') |
| 479 | return name; |
| 480 | name++; |
| 481 | } |
| 482 | return NULL; |
| 483 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 484 | |
| 485 | /* |
Krzysztof Piotr Oledzki | efe3b6f | 2008-05-23 23:49:32 +0200 | [diff] [blame] | 486 | * Checks <domainname> for invalid characters. Valid chars are [A-Za-z0-9_.-]. |
| 487 | * If an invalid character is found, a pointer to it is returned. |
| 488 | * If everything is fine, NULL is returned. |
| 489 | */ |
| 490 | const char *invalid_domainchar(const char *name) { |
| 491 | |
| 492 | if (!*name) |
| 493 | return name; |
| 494 | |
| 495 | while (*name) { |
Willy Tarreau | 88e0581 | 2010-03-03 00:16:00 +0100 | [diff] [blame] | 496 | if (!isalnum((int)(unsigned char)*name) && *name != '.' && |
Krzysztof Piotr Oledzki | efe3b6f | 2008-05-23 23:49:32 +0200 | [diff] [blame] | 497 | *name != '_' && *name != '-') |
| 498 | return name; |
| 499 | |
| 500 | name++; |
| 501 | } |
| 502 | |
| 503 | return NULL; |
| 504 | } |
| 505 | |
| 506 | /* |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 507 | * converts <str> to a struct sockaddr_storage* provided by the caller. The |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 508 | * caller must have zeroed <sa> first, and may have set sa->ss_family to force |
| 509 | * parse a specific address format. If the ss_family is 0 or AF_UNSPEC, then |
| 510 | * the function tries to guess the address family from the syntax. If the |
| 511 | * family is forced and the format doesn't match, an error is returned. The |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 512 | * string is assumed to contain only an address, no port. The address can be a |
| 513 | * dotted IPv4 address, an IPv6 address, a host name, or empty or "*" to |
| 514 | * indicate INADDR_ANY. NULL is returned if the host part cannot be resolved. |
| 515 | * The return address will only have the address family and the address set, |
| 516 | * all other fields remain zero. The string is not supposed to be modified. |
| 517 | * The IPv6 '::' address is IN6ADDR_ANY. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 518 | */ |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 519 | static struct sockaddr_storage *str2ip(const char *str, struct sockaddr_storage *sa) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 520 | { |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 521 | struct hostent *he; |
| 522 | |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 523 | /* Any IPv6 address */ |
| 524 | if (str[0] == ':' && str[1] == ':' && !str[2]) { |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 525 | if (!sa->ss_family || sa->ss_family == AF_UNSPEC) |
| 526 | sa->ss_family = AF_INET6; |
| 527 | else if (sa->ss_family != AF_INET6) |
| 528 | goto fail; |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 529 | return sa; |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 530 | } |
| 531 | |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 532 | /* Any address for the family, defaults to IPv4 */ |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 533 | if (!str[0] || (str[0] == '*' && !str[1])) { |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 534 | if (!sa->ss_family || sa->ss_family == AF_UNSPEC) |
| 535 | sa->ss_family = AF_INET; |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 536 | return sa; |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | /* check for IPv6 first */ |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 540 | if ((!sa->ss_family || sa->ss_family == AF_UNSPEC || sa->ss_family == AF_INET6) && |
| 541 | inet_pton(AF_INET6, str, &((struct sockaddr_in6 *)sa)->sin6_addr)) { |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 542 | sa->ss_family = AF_INET6; |
| 543 | return sa; |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | /* then check for IPv4 */ |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 547 | if ((!sa->ss_family || sa->ss_family == AF_UNSPEC || sa->ss_family == AF_INET) && |
| 548 | inet_pton(AF_INET, str, &((struct sockaddr_in *)sa)->sin_addr)) { |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 549 | sa->ss_family = AF_INET; |
| 550 | return sa; |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | /* try to resolve an IPv4/IPv6 hostname */ |
| 554 | he = gethostbyname(str); |
| 555 | if (he) { |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 556 | if (!sa->ss_family || sa->ss_family == AF_UNSPEC) |
| 557 | sa->ss_family = he->h_addrtype; |
| 558 | else if (sa->ss_family != he->h_addrtype) |
| 559 | goto fail; |
| 560 | |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 561 | switch (sa->ss_family) { |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 562 | case AF_INET: |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 563 | ((struct sockaddr_in *)sa)->sin_addr = *(struct in_addr *) *(he->h_addr_list); |
| 564 | return sa; |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 565 | case AF_INET6: |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 566 | ((struct sockaddr_in6 *)sa)->sin6_addr = *(struct in6_addr *) *(he->h_addr_list); |
| 567 | return sa; |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 568 | } |
David du Colombier | d5f4328 | 2011-03-17 10:40:16 +0100 | [diff] [blame] | 569 | } |
| 570 | #ifdef USE_GETADDRINFO |
| 571 | else { |
| 572 | struct addrinfo hints, *result; |
| 573 | |
| 574 | memset(&result, 0, sizeof(result)); |
| 575 | memset(&hints, 0, sizeof(hints)); |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 576 | hints.ai_family = sa->ss_family ? sa->ss_family : AF_UNSPEC; |
David du Colombier | d5f4328 | 2011-03-17 10:40:16 +0100 | [diff] [blame] | 577 | hints.ai_socktype = SOCK_DGRAM; |
| 578 | hints.ai_flags = AI_PASSIVE; |
| 579 | hints.ai_protocol = 0; |
| 580 | |
| 581 | if (getaddrinfo(str, NULL, &hints, &result) == 0) { |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 582 | if (!sa->ss_family || sa->ss_family == AF_UNSPEC) |
| 583 | sa->ss_family = result->ai_family; |
| 584 | else if (sa->ss_family != result->ai_family) |
| 585 | goto fail; |
| 586 | |
David du Colombier | d5f4328 | 2011-03-17 10:40:16 +0100 | [diff] [blame] | 587 | switch (result->ai_family) { |
| 588 | case AF_INET: |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 589 | memcpy((struct sockaddr_in *)sa, result->ai_addr, result->ai_addrlen); |
| 590 | return sa; |
David du Colombier | d5f4328 | 2011-03-17 10:40:16 +0100 | [diff] [blame] | 591 | case AF_INET6: |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 592 | memcpy((struct sockaddr_in6 *)sa, result->ai_addr, result->ai_addrlen); |
| 593 | return sa; |
David du Colombier | d5f4328 | 2011-03-17 10:40:16 +0100 | [diff] [blame] | 594 | } |
| 595 | } |
| 596 | |
Sean Carey | 58ea039 | 2013-02-15 23:39:18 +0100 | [diff] [blame] | 597 | if (result) |
| 598 | freeaddrinfo(result); |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 599 | } |
David du Colombier | d5f4328 | 2011-03-17 10:40:16 +0100 | [diff] [blame] | 600 | #endif |
| 601 | /* unsupported address family */ |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 602 | fail: |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 603 | return NULL; |
| 604 | } |
| 605 | |
| 606 | /* |
Willy Tarreau | d4448bc | 2013-02-20 15:55:15 +0100 | [diff] [blame] | 607 | * Converts <str> to a locally allocated struct sockaddr_storage *, and a port |
| 608 | * range or offset consisting in two integers that the caller will have to |
| 609 | * check to find the relevant input format. The following format are supported : |
| 610 | * |
| 611 | * String format | address | port | low | high |
| 612 | * addr | <addr> | 0 | 0 | 0 |
| 613 | * addr: | <addr> | 0 | 0 | 0 |
| 614 | * addr:port | <addr> | <port> | <port> | <port> |
| 615 | * addr:pl-ph | <addr> | <pl> | <pl> | <ph> |
| 616 | * addr:+port | <addr> | <port> | 0 | <port> |
| 617 | * addr:-port | <addr> |-<port> | <port> | 0 |
| 618 | * |
| 619 | * The detection of a port range or increment by the caller is made by |
| 620 | * comparing <low> and <high>. If both are equal, then port 0 means no port |
| 621 | * was specified. The caller may pass NULL for <low> and <high> if it is not |
| 622 | * interested in retrieving port ranges. |
| 623 | * |
| 624 | * Note that <addr> above may also be : |
| 625 | * - empty ("") => family will be AF_INET and address will be INADDR_ANY |
| 626 | * - "*" => family will be AF_INET and address will be INADDR_ANY |
| 627 | * - "::" => family will be AF_INET6 and address will be IN6ADDR_ANY |
| 628 | * - a host name => family and address will depend on host name resolving. |
| 629 | * |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 630 | * A prefix may be passed in before the address above to force the family : |
| 631 | * - "ipv4@" => force address to resolve as IPv4 and fail if not possible. |
| 632 | * - "ipv6@" => force address to resolve as IPv6 and fail if not possible. |
| 633 | * - "unix@" => force address to be a path to a UNIX socket even if the |
| 634 | * path does not start with a '/' |
| 635 | * |
Willy Tarreau | d4448bc | 2013-02-20 15:55:15 +0100 | [diff] [blame] | 636 | * Also note that in order to avoid any ambiguity with IPv6 addresses, the ':' |
| 637 | * is mandatory after the IP address even when no port is specified. NULL is |
| 638 | * returned if the address cannot be parsed. The <low> and <high> ports are |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 639 | * always initialized if non-null, even for non-IP families. |
Willy Tarreau | d393a62 | 2013-03-04 18:22:00 +0100 | [diff] [blame] | 640 | * |
| 641 | * If <pfx> is non-null, it is used as a string prefix before any path-based |
| 642 | * address (typically the path to a unix socket). |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 643 | */ |
Willy Tarreau | d393a62 | 2013-03-04 18:22:00 +0100 | [diff] [blame] | 644 | struct sockaddr_storage *str2sa_range(const char *str, int *low, int *high, char **err, const char *pfx) |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 645 | { |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 646 | static struct sockaddr_storage ss; |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 647 | struct sockaddr_storage *ret = NULL; |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 648 | char *back, *str2; |
Willy Tarreau | d4448bc | 2013-02-20 15:55:15 +0100 | [diff] [blame] | 649 | char *port1, *port2; |
| 650 | int portl, porth, porta; |
| 651 | |
| 652 | portl = porth = porta = 0; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 653 | |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 654 | str2 = back = strdup(str); |
Willy Tarreau | df350f1 | 2013-03-01 20:22:54 +0100 | [diff] [blame] | 655 | if (str2 == NULL) { |
| 656 | memprintf(err, "out of memory in '%s'\n", __FUNCTION__); |
Willy Tarreau | d5191e7 | 2010-02-09 20:50:45 +0100 | [diff] [blame] | 657 | goto out; |
Willy Tarreau | df350f1 | 2013-03-01 20:22:54 +0100 | [diff] [blame] | 658 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 659 | |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 660 | memset(&ss, 0, sizeof(ss)); |
| 661 | |
| 662 | if (strncmp(str2, "unix@", 5) == 0) { |
| 663 | str2 += 5; |
| 664 | ss.ss_family = AF_UNIX; |
| 665 | } |
| 666 | else if (strncmp(str2, "ipv4@", 5) == 0) { |
| 667 | str2 += 5; |
| 668 | ss.ss_family = AF_INET; |
| 669 | } |
| 670 | else if (strncmp(str2, "ipv6@", 5) == 0) { |
| 671 | str2 += 5; |
| 672 | ss.ss_family = AF_INET6; |
| 673 | } |
| 674 | else if (*str2 == '/') { |
| 675 | ss.ss_family = AF_UNIX; |
| 676 | } |
| 677 | else |
| 678 | ss.ss_family = AF_UNSPEC; |
| 679 | |
| 680 | if (ss.ss_family == AF_UNIX) { |
Willy Tarreau | 1558638 | 2013-03-04 19:48:14 +0100 | [diff] [blame] | 681 | int prefix_path_len; |
| 682 | int max_path_len; |
| 683 | |
| 684 | /* complete unix socket path name during startup or soft-restart is |
| 685 | * <unix_bind_prefix><path>.<pid>.<bak|tmp> |
| 686 | */ |
| 687 | prefix_path_len = pfx ? strlen(pfx) : 0; |
| 688 | max_path_len = (sizeof(((struct sockaddr_un *)&ss)->sun_path) - 1) - |
| 689 | (prefix_path_len ? prefix_path_len + 1 + 5 + 1 + 3 : 0); |
| 690 | |
| 691 | if (strlen(str2) > max_path_len) { |
| 692 | memprintf(err, "socket path '%s' too long (max %d)\n", str, max_path_len); |
| 693 | goto out; |
| 694 | } |
| 695 | |
Willy Tarreau | 1558638 | 2013-03-04 19:48:14 +0100 | [diff] [blame] | 696 | if (pfx) { |
| 697 | memcpy(((struct sockaddr_un *)&ss)->sun_path, pfx, prefix_path_len); |
| 698 | strcpy(((struct sockaddr_un *)&ss)->sun_path + prefix_path_len, str2); |
| 699 | } |
| 700 | else { |
| 701 | strcpy(((struct sockaddr_un *)&ss)->sun_path, str2); |
| 702 | } |
Willy Tarreau | 1558638 | 2013-03-04 19:48:14 +0100 | [diff] [blame] | 703 | } |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 704 | else { /* IPv4 and IPv6 */ |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 705 | port1 = strrchr(str2, ':'); |
| 706 | if (port1) |
| 707 | *port1++ = '\0'; |
| 708 | else |
| 709 | port1 = ""; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 710 | |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 711 | if (str2ip(str2, &ss) == NULL) { |
| 712 | memprintf(err, "invalid address: '%s' in '%s'\n", str2, str); |
| 713 | goto out; |
| 714 | } |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 715 | |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 716 | if (isdigit(*port1)) { /* single port or range */ |
| 717 | port2 = strchr(port1, '-'); |
| 718 | if (port2) |
| 719 | *port2++ = '\0'; |
| 720 | else |
| 721 | port2 = port1; |
| 722 | portl = atoi(port1); |
| 723 | porth = atoi(port2); |
| 724 | porta = portl; |
| 725 | } |
| 726 | else if (*port1 == '-') { /* negative offset */ |
| 727 | portl = atoi(port1 + 1); |
| 728 | porta = -portl; |
| 729 | } |
| 730 | else if (*port1 == '+') { /* positive offset */ |
| 731 | porth = atoi(port1 + 1); |
| 732 | porta = porth; |
| 733 | } |
| 734 | else if (*port1) { /* other any unexpected char */ |
| 735 | memprintf(err, "invalid character '%c' in port number '%s'\n", *port1, port1); |
| 736 | goto out; |
| 737 | } |
| 738 | set_host_port(&ss, porta); |
Willy Tarreau | e4c58c8 | 2013-03-06 15:28:17 +0100 | [diff] [blame] | 739 | } |
Willy Tarreau | fab5a43 | 2011-03-04 15:31:53 +0100 | [diff] [blame] | 740 | |
Willy Tarreau | c120c8d | 2013-03-10 19:27:44 +0100 | [diff] [blame] | 741 | ret = &ss; |
Willy Tarreau | d5191e7 | 2010-02-09 20:50:45 +0100 | [diff] [blame] | 742 | out: |
Willy Tarreau | d4448bc | 2013-02-20 15:55:15 +0100 | [diff] [blame] | 743 | if (low) |
| 744 | *low = portl; |
| 745 | if (high) |
| 746 | *high = porth; |
Willy Tarreau | 2470928 | 2013-03-10 21:32:12 +0100 | [diff] [blame^] | 747 | free(back); |
Willy Tarreau | d5191e7 | 2010-02-09 20:50:45 +0100 | [diff] [blame] | 748 | return ret; |
Willy Tarreau | c6f4ce8 | 2009-06-10 11:09:37 +0200 | [diff] [blame] | 749 | } |
| 750 | |
Willy Tarreau | 2937c0d | 2010-01-26 17:36:17 +0100 | [diff] [blame] | 751 | /* converts <str> to a struct in_addr containing a network mask. It can be |
| 752 | * passed in dotted form (255.255.255.0) or in CIDR form (24). It returns 1 |
| 753 | * if the conversion succeeds otherwise non-zero. |
| 754 | */ |
| 755 | int str2mask(const char *str, struct in_addr *mask) |
| 756 | { |
| 757 | if (strchr(str, '.') != NULL) { /* dotted notation */ |
| 758 | if (!inet_pton(AF_INET, str, mask)) |
| 759 | return 0; |
| 760 | } |
| 761 | else { /* mask length */ |
| 762 | char *err; |
| 763 | unsigned long len = strtol(str, &err, 10); |
| 764 | |
| 765 | if (!*str || (err && *err) || (unsigned)len > 32) |
| 766 | return 0; |
| 767 | if (len) |
| 768 | mask->s_addr = htonl(~0UL << (32 - len)); |
| 769 | else |
| 770 | mask->s_addr = 0; |
| 771 | } |
| 772 | return 1; |
| 773 | } |
| 774 | |
Willy Tarreau | c6f4ce8 | 2009-06-10 11:09:37 +0200 | [diff] [blame] | 775 | /* |
Willy Tarreau | d077a8e | 2007-05-08 18:28:09 +0200 | [diff] [blame] | 776 | * converts <str> to two struct in_addr* which must be pre-allocated. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 777 | * The format is "addr[/mask]", where "addr" cannot be empty, and mask |
| 778 | * is optionnal and either in the dotted or CIDR notation. |
| 779 | * Note: "addr" can also be a hostname. Returns 1 if OK, 0 if error. |
| 780 | */ |
Willy Tarreau | d077a8e | 2007-05-08 18:28:09 +0200 | [diff] [blame] | 781 | int str2net(const char *str, struct in_addr *addr, struct in_addr *mask) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 782 | { |
Willy Tarreau | 8aeae4a | 2007-06-17 11:42:08 +0200 | [diff] [blame] | 783 | __label__ out_free, out_err; |
| 784 | char *c, *s; |
| 785 | int ret_val; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 786 | |
Willy Tarreau | 8aeae4a | 2007-06-17 11:42:08 +0200 | [diff] [blame] | 787 | s = strdup(str); |
| 788 | if (!s) |
| 789 | return 0; |
| 790 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 791 | memset(mask, 0, sizeof(*mask)); |
| 792 | memset(addr, 0, sizeof(*addr)); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 793 | |
Willy Tarreau | 8aeae4a | 2007-06-17 11:42:08 +0200 | [diff] [blame] | 794 | if ((c = strrchr(s, '/')) != NULL) { |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 795 | *c++ = '\0'; |
| 796 | /* c points to the mask */ |
Willy Tarreau | 2937c0d | 2010-01-26 17:36:17 +0100 | [diff] [blame] | 797 | if (!str2mask(c, mask)) |
| 798 | goto out_err; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 799 | } |
| 800 | else { |
Willy Tarreau | ebd6160 | 2006-12-30 11:54:15 +0100 | [diff] [blame] | 801 | mask->s_addr = ~0U; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 802 | } |
Willy Tarreau | 8aeae4a | 2007-06-17 11:42:08 +0200 | [diff] [blame] | 803 | if (!inet_pton(AF_INET, s, addr)) { |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 804 | struct hostent *he; |
| 805 | |
Willy Tarreau | 8aeae4a | 2007-06-17 11:42:08 +0200 | [diff] [blame] | 806 | if ((he = gethostbyname(s)) == NULL) { |
| 807 | goto out_err; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 808 | } |
| 809 | else |
| 810 | *addr = *(struct in_addr *) *(he->h_addr_list); |
| 811 | } |
Willy Tarreau | 8aeae4a | 2007-06-17 11:42:08 +0200 | [diff] [blame] | 812 | |
| 813 | ret_val = 1; |
| 814 | out_free: |
| 815 | free(s); |
| 816 | return ret_val; |
| 817 | out_err: |
| 818 | ret_val = 0; |
| 819 | goto out_free; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 820 | } |
| 821 | |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 822 | |
| 823 | /* |
Willy Tarreau | 6d20e28 | 2012-04-27 22:49:47 +0200 | [diff] [blame] | 824 | * converts <str> to two struct in6_addr* which must be pre-allocated. |
| 825 | * The format is "addr[/mask]", where "addr" cannot be empty, and mask |
| 826 | * is an optionnal number of bits (128 being the default). |
| 827 | * Returns 1 if OK, 0 if error. |
| 828 | */ |
| 829 | int str62net(const char *str, struct in6_addr *addr, unsigned char *mask) |
| 830 | { |
| 831 | char *c, *s; |
| 832 | int ret_val = 0; |
| 833 | char *err; |
| 834 | unsigned long len = 128; |
| 835 | |
| 836 | s = strdup(str); |
| 837 | if (!s) |
| 838 | return 0; |
| 839 | |
| 840 | memset(mask, 0, sizeof(*mask)); |
| 841 | memset(addr, 0, sizeof(*addr)); |
| 842 | |
| 843 | if ((c = strrchr(s, '/')) != NULL) { |
| 844 | *c++ = '\0'; /* c points to the mask */ |
| 845 | if (!*c) |
| 846 | goto out_free; |
| 847 | |
| 848 | len = strtoul(c, &err, 10); |
| 849 | if ((err && *err) || (unsigned)len > 128) |
| 850 | goto out_free; |
| 851 | } |
| 852 | *mask = len; /* OK we have a valid mask in <len> */ |
| 853 | |
| 854 | if (!inet_pton(AF_INET6, s, addr)) |
| 855 | goto out_free; |
| 856 | |
| 857 | ret_val = 1; |
| 858 | out_free: |
| 859 | free(s); |
| 860 | return ret_val; |
| 861 | } |
| 862 | |
| 863 | |
| 864 | /* |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 865 | * Parse IPv4 address found in url. |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 866 | */ |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 867 | int url2ipv4(const char *addr, struct in_addr *dst) |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 868 | { |
| 869 | int saw_digit, octets, ch; |
| 870 | u_char tmp[4], *tp; |
| 871 | const char *cp = addr; |
| 872 | |
| 873 | saw_digit = 0; |
| 874 | octets = 0; |
| 875 | *(tp = tmp) = 0; |
| 876 | |
| 877 | while (*addr) { |
| 878 | unsigned char digit = (ch = *addr++) - '0'; |
| 879 | if (digit > 9 && ch != '.') |
| 880 | break; |
| 881 | if (digit <= 9) { |
| 882 | u_int new = *tp * 10 + digit; |
| 883 | if (new > 255) |
| 884 | return 0; |
| 885 | *tp = new; |
| 886 | if (!saw_digit) { |
| 887 | if (++octets > 4) |
| 888 | return 0; |
| 889 | saw_digit = 1; |
| 890 | } |
| 891 | } else if (ch == '.' && saw_digit) { |
| 892 | if (octets == 4) |
| 893 | return 0; |
| 894 | *++tp = 0; |
| 895 | saw_digit = 0; |
| 896 | } else |
| 897 | return 0; |
| 898 | } |
| 899 | |
| 900 | if (octets < 4) |
| 901 | return 0; |
| 902 | |
| 903 | memcpy(&dst->s_addr, tmp, 4); |
| 904 | return addr-cp-1; |
| 905 | } |
| 906 | |
| 907 | /* |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 908 | * Resolve destination server from URL. Convert <str> to a sockaddr_storage*. |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 909 | */ |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 910 | int url2sa(const char *url, int ulen, struct sockaddr_storage *addr) |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 911 | { |
| 912 | const char *curr = url, *cp = url; |
| 913 | int ret, url_code = 0; |
| 914 | unsigned int http_code = 0; |
| 915 | |
| 916 | /* Cleanup the room */ |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 917 | |
| 918 | /* FIXME: assume IPv4 only for now */ |
| 919 | ((struct sockaddr_in *)addr)->sin_family = AF_INET; |
| 920 | ((struct sockaddr_in *)addr)->sin_addr.s_addr = 0; |
| 921 | ((struct sockaddr_in *)addr)->sin_port = 0; |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 922 | |
| 923 | /* Firstly, try to find :// pattern */ |
| 924 | while (curr < url+ulen && url_code != 0x3a2f2f) { |
| 925 | url_code = ((url_code & 0xffff) << 8); |
| 926 | url_code += (unsigned char)*curr++; |
| 927 | } |
| 928 | |
| 929 | /* Secondly, if :// pattern is found, verify parsed stuff |
| 930 | * before pattern is matching our http pattern. |
| 931 | * If so parse ip address and port in uri. |
| 932 | * |
| 933 | * WARNING: Current code doesn't support dynamic async dns resolver. |
| 934 | */ |
| 935 | if (url_code == 0x3a2f2f) { |
| 936 | while (cp < curr - 3) |
| 937 | http_code = (http_code << 8) + *cp++; |
| 938 | http_code |= 0x20202020; /* Turn everything to lower case */ |
| 939 | |
| 940 | /* HTTP url matching */ |
| 941 | if (http_code == 0x68747470) { |
| 942 | /* We are looking for IP address. If you want to parse and |
Willy Tarreau | d4448bc | 2013-02-20 15:55:15 +0100 | [diff] [blame] | 943 | * resolve hostname found in url, you can use str2sa_range(), but |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 944 | * be warned this can slow down global daemon performances |
| 945 | * while handling lagging dns responses. |
| 946 | */ |
Cyril Bonté | 9ccf661 | 2012-10-24 23:47:47 +0200 | [diff] [blame] | 947 | ret = url2ipv4(curr, &((struct sockaddr_in *)addr)->sin_addr); |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 948 | if (!ret) |
| 949 | return -1; |
| 950 | curr += ret; |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 951 | ((struct sockaddr_in *)addr)->sin_port = (*curr == ':') ? str2uic(++curr) : 80; |
Cyril Bonté | 9ccf661 | 2012-10-24 23:47:47 +0200 | [diff] [blame] | 952 | ((struct sockaddr_in *)addr)->sin_port = htons(((struct sockaddr_in *)addr)->sin_port); |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 953 | } |
| 954 | return 0; |
| 955 | } |
| 956 | |
| 957 | return -1; |
| 958 | } |
| 959 | |
Willy Tarreau | 631f01c | 2011-09-05 00:36:48 +0200 | [diff] [blame] | 960 | /* Tries to convert a sockaddr_storage address to text form. Upon success, the |
| 961 | * address family is returned so that it's easy for the caller to adapt to the |
| 962 | * output format. Zero is returned if the address family is not supported. -1 |
| 963 | * is returned upon error, with errno set. AF_INET, AF_INET6 and AF_UNIX are |
| 964 | * supported. |
| 965 | */ |
| 966 | int addr_to_str(struct sockaddr_storage *addr, char *str, int size) |
| 967 | { |
| 968 | |
| 969 | void *ptr; |
| 970 | |
| 971 | if (size < 5) |
| 972 | return 0; |
| 973 | *str = '\0'; |
| 974 | |
| 975 | switch (addr->ss_family) { |
| 976 | case AF_INET: |
| 977 | ptr = &((struct sockaddr_in *)addr)->sin_addr; |
| 978 | break; |
| 979 | case AF_INET6: |
| 980 | ptr = &((struct sockaddr_in6 *)addr)->sin6_addr; |
| 981 | break; |
| 982 | case AF_UNIX: |
| 983 | memcpy(str, "unix", 5); |
| 984 | return addr->ss_family; |
| 985 | default: |
| 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | if (inet_ntop(addr->ss_family, ptr, str, size)) |
| 990 | return addr->ss_family; |
| 991 | |
| 992 | /* failed */ |
| 993 | return -1; |
| 994 | } |
| 995 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 996 | /* will try to encode the string <string> replacing all characters tagged in |
| 997 | * <map> with the hexadecimal representation of their ASCII-code (2 digits) |
| 998 | * prefixed by <escape>, and will store the result between <start> (included) |
| 999 | * and <stop> (excluded), and will always terminate the string with a '\0' |
| 1000 | * before <stop>. The position of the '\0' is returned if the conversion |
| 1001 | * completes. If bytes are missing between <start> and <stop>, then the |
| 1002 | * conversion will be incomplete and truncated. If <stop> <= <start>, the '\0' |
| 1003 | * cannot even be stored so we return <start> without writing the 0. |
| 1004 | * The input string must also be zero-terminated. |
| 1005 | */ |
| 1006 | const char hextab[16] = "0123456789ABCDEF"; |
| 1007 | char *encode_string(char *start, char *stop, |
| 1008 | const char escape, const fd_set *map, |
| 1009 | const char *string) |
| 1010 | { |
| 1011 | if (start < stop) { |
| 1012 | stop--; /* reserve one byte for the final '\0' */ |
| 1013 | while (start < stop && *string != '\0') { |
| 1014 | if (!FD_ISSET((unsigned char)(*string), map)) |
| 1015 | *start++ = *string; |
| 1016 | else { |
| 1017 | if (start + 3 >= stop) |
| 1018 | break; |
| 1019 | *start++ = escape; |
| 1020 | *start++ = hextab[(*string >> 4) & 15]; |
| 1021 | *start++ = hextab[*string & 15]; |
| 1022 | } |
| 1023 | string++; |
| 1024 | } |
| 1025 | *start = '\0'; |
| 1026 | } |
| 1027 | return start; |
| 1028 | } |
| 1029 | |
Willy Tarreau | bf9c2fc | 2011-05-31 18:06:18 +0200 | [diff] [blame] | 1030 | /* Decode an URL-encoded string in-place. The resulting string might |
| 1031 | * be shorter. If some forbidden characters are found, the conversion is |
| 1032 | * aborted, the string is truncated before the issue and non-zero is returned, |
| 1033 | * otherwise the operation returns non-zero indicating success. |
| 1034 | */ |
| 1035 | int url_decode(char *string) |
| 1036 | { |
| 1037 | char *in, *out; |
| 1038 | int ret = 0; |
| 1039 | |
| 1040 | in = string; |
| 1041 | out = string; |
| 1042 | while (*in) { |
| 1043 | switch (*in) { |
| 1044 | case '+' : |
| 1045 | *out++ = ' '; |
| 1046 | break; |
| 1047 | case '%' : |
| 1048 | if (!ishex(in[1]) || !ishex(in[2])) |
| 1049 | goto end; |
| 1050 | *out++ = (hex2i(in[1]) << 4) + hex2i(in[2]); |
| 1051 | in += 2; |
| 1052 | break; |
| 1053 | default: |
| 1054 | *out++ = *in; |
| 1055 | break; |
| 1056 | } |
| 1057 | in++; |
| 1058 | } |
| 1059 | ret = 1; /* success */ |
| 1060 | end: |
| 1061 | *out = 0; |
| 1062 | return ret; |
| 1063 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1064 | |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1065 | unsigned int str2ui(const char *s) |
| 1066 | { |
| 1067 | return __str2ui(s); |
| 1068 | } |
| 1069 | |
| 1070 | unsigned int str2uic(const char *s) |
| 1071 | { |
| 1072 | return __str2uic(s); |
| 1073 | } |
| 1074 | |
| 1075 | unsigned int strl2ui(const char *s, int len) |
| 1076 | { |
| 1077 | return __strl2ui(s, len); |
| 1078 | } |
| 1079 | |
| 1080 | unsigned int strl2uic(const char *s, int len) |
| 1081 | { |
| 1082 | return __strl2uic(s, len); |
| 1083 | } |
| 1084 | |
Willy Tarreau | 4ec83cd | 2010-10-15 23:19:55 +0200 | [diff] [blame] | 1085 | unsigned int read_uint(const char **s, const char *end) |
| 1086 | { |
| 1087 | return __read_uint(s, end); |
| 1088 | } |
| 1089 | |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1090 | /* This one is 7 times faster than strtol() on athlon with checks. |
| 1091 | * It returns the value of the number composed of all valid digits read, |
| 1092 | * and can process negative numbers too. |
| 1093 | */ |
| 1094 | int strl2ic(const char *s, int len) |
| 1095 | { |
| 1096 | int i = 0; |
Willy Tarreau | 3f0c976 | 2007-10-25 09:42:24 +0200 | [diff] [blame] | 1097 | int j, k; |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1098 | |
| 1099 | if (len > 0) { |
| 1100 | if (*s != '-') { |
| 1101 | /* positive number */ |
| 1102 | while (len-- > 0) { |
| 1103 | j = (*s++) - '0'; |
Willy Tarreau | 3f0c976 | 2007-10-25 09:42:24 +0200 | [diff] [blame] | 1104 | k = i * 10; |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1105 | if (j > 9) |
| 1106 | break; |
Willy Tarreau | 3f0c976 | 2007-10-25 09:42:24 +0200 | [diff] [blame] | 1107 | i = k + j; |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1108 | } |
| 1109 | } else { |
| 1110 | /* negative number */ |
| 1111 | s++; |
| 1112 | while (--len > 0) { |
| 1113 | j = (*s++) - '0'; |
Willy Tarreau | 3f0c976 | 2007-10-25 09:42:24 +0200 | [diff] [blame] | 1114 | k = i * 10; |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1115 | if (j > 9) |
| 1116 | break; |
Willy Tarreau | 3f0c976 | 2007-10-25 09:42:24 +0200 | [diff] [blame] | 1117 | i = k - j; |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1118 | } |
| 1119 | } |
| 1120 | } |
| 1121 | return i; |
| 1122 | } |
| 1123 | |
| 1124 | |
| 1125 | /* This function reads exactly <len> chars from <s> and converts them to a |
| 1126 | * signed integer which it stores into <ret>. It accurately detects any error |
| 1127 | * (truncated string, invalid chars, overflows). It is meant to be used in |
| 1128 | * applications designed for hostile environments. It returns zero when the |
| 1129 | * number has successfully been converted, non-zero otherwise. When an error |
| 1130 | * is returned, the <ret> value is left untouched. It is yet 5 to 40 times |
| 1131 | * faster than strtol(). |
| 1132 | */ |
| 1133 | int strl2irc(const char *s, int len, int *ret) |
| 1134 | { |
| 1135 | int i = 0; |
| 1136 | int j; |
| 1137 | |
| 1138 | if (!len) |
| 1139 | return 1; |
| 1140 | |
| 1141 | if (*s != '-') { |
| 1142 | /* positive number */ |
| 1143 | while (len-- > 0) { |
| 1144 | j = (*s++) - '0'; |
| 1145 | if (j > 9) return 1; /* invalid char */ |
| 1146 | if (i > INT_MAX / 10) return 1; /* check for multiply overflow */ |
| 1147 | i = i * 10; |
| 1148 | if (i + j < i) return 1; /* check for addition overflow */ |
| 1149 | i = i + j; |
| 1150 | } |
| 1151 | } else { |
| 1152 | /* negative number */ |
| 1153 | s++; |
| 1154 | while (--len > 0) { |
| 1155 | j = (*s++) - '0'; |
| 1156 | if (j > 9) return 1; /* invalid char */ |
| 1157 | if (i < INT_MIN / 10) return 1; /* check for multiply overflow */ |
| 1158 | i = i * 10; |
| 1159 | if (i - j > i) return 1; /* check for subtract overflow */ |
| 1160 | i = i - j; |
| 1161 | } |
| 1162 | } |
| 1163 | *ret = i; |
| 1164 | return 0; |
| 1165 | } |
| 1166 | |
| 1167 | |
| 1168 | /* This function reads exactly <len> chars from <s> and converts them to a |
| 1169 | * signed integer which it stores into <ret>. It accurately detects any error |
| 1170 | * (truncated string, invalid chars, overflows). It is meant to be used in |
| 1171 | * applications designed for hostile environments. It returns zero when the |
| 1172 | * number has successfully been converted, non-zero otherwise. When an error |
| 1173 | * is returned, the <ret> value is left untouched. It is about 3 times slower |
| 1174 | * than str2irc(). |
| 1175 | */ |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1176 | |
| 1177 | int strl2llrc(const char *s, int len, long long *ret) |
| 1178 | { |
| 1179 | long long i = 0; |
| 1180 | int j; |
| 1181 | |
| 1182 | if (!len) |
| 1183 | return 1; |
| 1184 | |
| 1185 | if (*s != '-') { |
| 1186 | /* positive number */ |
| 1187 | while (len-- > 0) { |
| 1188 | j = (*s++) - '0'; |
| 1189 | if (j > 9) return 1; /* invalid char */ |
| 1190 | if (i > LLONG_MAX / 10LL) return 1; /* check for multiply overflow */ |
| 1191 | i = i * 10LL; |
| 1192 | if (i + j < i) return 1; /* check for addition overflow */ |
| 1193 | i = i + j; |
| 1194 | } |
| 1195 | } else { |
| 1196 | /* negative number */ |
| 1197 | s++; |
| 1198 | while (--len > 0) { |
| 1199 | j = (*s++) - '0'; |
| 1200 | if (j > 9) return 1; /* invalid char */ |
| 1201 | if (i < LLONG_MIN / 10LL) return 1; /* check for multiply overflow */ |
| 1202 | i = i * 10LL; |
| 1203 | if (i - j > i) return 1; /* check for subtract overflow */ |
| 1204 | i = i - j; |
| 1205 | } |
| 1206 | } |
| 1207 | *ret = i; |
| 1208 | return 0; |
| 1209 | } |
| 1210 | |
Willy Tarreau | a0d37b6 | 2007-12-02 22:00:35 +0100 | [diff] [blame] | 1211 | /* This function parses a time value optionally followed by a unit suffix among |
| 1212 | * "d", "h", "m", "s", "ms" or "us". It converts the value into the unit |
| 1213 | * expected by the caller. The computation does its best to avoid overflows. |
| 1214 | * The value is returned in <ret> if everything is fine, and a NULL is returned |
| 1215 | * by the function. In case of error, a pointer to the error is returned and |
| 1216 | * <ret> is left untouched. Values are automatically rounded up when needed. |
| 1217 | */ |
| 1218 | const char *parse_time_err(const char *text, unsigned *ret, unsigned unit_flags) |
| 1219 | { |
| 1220 | unsigned imult, idiv; |
| 1221 | unsigned omult, odiv; |
| 1222 | unsigned value; |
| 1223 | |
| 1224 | omult = odiv = 1; |
| 1225 | |
| 1226 | switch (unit_flags & TIME_UNIT_MASK) { |
| 1227 | case TIME_UNIT_US: omult = 1000000; break; |
| 1228 | case TIME_UNIT_MS: omult = 1000; break; |
| 1229 | case TIME_UNIT_S: break; |
| 1230 | case TIME_UNIT_MIN: odiv = 60; break; |
| 1231 | case TIME_UNIT_HOUR: odiv = 3600; break; |
| 1232 | case TIME_UNIT_DAY: odiv = 86400; break; |
| 1233 | default: break; |
| 1234 | } |
| 1235 | |
| 1236 | value = 0; |
| 1237 | |
| 1238 | while (1) { |
| 1239 | unsigned int j; |
| 1240 | |
| 1241 | j = *text - '0'; |
| 1242 | if (j > 9) |
| 1243 | break; |
| 1244 | text++; |
| 1245 | value *= 10; |
| 1246 | value += j; |
| 1247 | } |
| 1248 | |
| 1249 | imult = idiv = 1; |
| 1250 | switch (*text) { |
| 1251 | case '\0': /* no unit = default unit */ |
| 1252 | imult = omult = idiv = odiv = 1; |
| 1253 | break; |
| 1254 | case 's': /* second = unscaled unit */ |
| 1255 | break; |
| 1256 | case 'u': /* microsecond : "us" */ |
| 1257 | if (text[1] == 's') { |
| 1258 | idiv = 1000000; |
| 1259 | text++; |
| 1260 | } |
| 1261 | break; |
| 1262 | case 'm': /* millisecond : "ms" or minute: "m" */ |
| 1263 | if (text[1] == 's') { |
| 1264 | idiv = 1000; |
| 1265 | text++; |
| 1266 | } else |
| 1267 | imult = 60; |
| 1268 | break; |
| 1269 | case 'h': /* hour : "h" */ |
| 1270 | imult = 3600; |
| 1271 | break; |
| 1272 | case 'd': /* day : "d" */ |
| 1273 | imult = 86400; |
| 1274 | break; |
| 1275 | default: |
| 1276 | return text; |
| 1277 | break; |
| 1278 | } |
| 1279 | |
| 1280 | if (omult % idiv == 0) { omult /= idiv; idiv = 1; } |
| 1281 | if (idiv % omult == 0) { idiv /= omult; omult = 1; } |
| 1282 | if (imult % odiv == 0) { imult /= odiv; odiv = 1; } |
| 1283 | if (odiv % imult == 0) { odiv /= imult; imult = 1; } |
| 1284 | |
| 1285 | value = (value * (imult * omult) + (idiv * odiv - 1)) / (idiv * odiv); |
| 1286 | *ret = value; |
| 1287 | return NULL; |
| 1288 | } |
Willy Tarreau | 6911fa4 | 2007-03-04 18:06:08 +0100 | [diff] [blame] | 1289 | |
Emeric Brun | 39132b2 | 2010-01-04 14:57:24 +0100 | [diff] [blame] | 1290 | /* this function converts the string starting at <text> to an unsigned int |
| 1291 | * stored in <ret>. If an error is detected, the pointer to the unexpected |
| 1292 | * character is returned. If the conversio is succesful, NULL is returned. |
| 1293 | */ |
| 1294 | const char *parse_size_err(const char *text, unsigned *ret) { |
| 1295 | unsigned value = 0; |
| 1296 | |
| 1297 | while (1) { |
| 1298 | unsigned int j; |
| 1299 | |
| 1300 | j = *text - '0'; |
| 1301 | if (j > 9) |
| 1302 | break; |
| 1303 | if (value > ~0U / 10) |
| 1304 | return text; |
| 1305 | value *= 10; |
| 1306 | if (value > (value + j)) |
| 1307 | return text; |
| 1308 | value += j; |
| 1309 | text++; |
| 1310 | } |
| 1311 | |
| 1312 | switch (*text) { |
| 1313 | case '\0': |
| 1314 | break; |
| 1315 | case 'K': |
| 1316 | case 'k': |
| 1317 | if (value > ~0U >> 10) |
| 1318 | return text; |
| 1319 | value = value << 10; |
| 1320 | break; |
| 1321 | case 'M': |
| 1322 | case 'm': |
| 1323 | if (value > ~0U >> 20) |
| 1324 | return text; |
| 1325 | value = value << 20; |
| 1326 | break; |
| 1327 | case 'G': |
| 1328 | case 'g': |
| 1329 | if (value > ~0U >> 30) |
| 1330 | return text; |
| 1331 | value = value << 30; |
| 1332 | break; |
| 1333 | default: |
| 1334 | return text; |
| 1335 | } |
| 1336 | |
| 1337 | *ret = value; |
| 1338 | return NULL; |
| 1339 | } |
| 1340 | |
Willy Tarreau | 946ba59 | 2009-05-10 15:41:18 +0200 | [diff] [blame] | 1341 | /* copies at most <n> characters from <src> and always terminates with '\0' */ |
| 1342 | char *my_strndup(const char *src, int n) |
| 1343 | { |
| 1344 | int len = 0; |
| 1345 | char *ret; |
| 1346 | |
| 1347 | while (len < n && src[len]) |
| 1348 | len++; |
| 1349 | |
| 1350 | ret = (char *)malloc(len + 1); |
| 1351 | if (!ret) |
| 1352 | return ret; |
| 1353 | memcpy(ret, src, len); |
| 1354 | ret[len] = '\0'; |
| 1355 | return ret; |
| 1356 | } |
| 1357 | |
Willy Tarreau | 482b00d | 2009-10-04 22:48:42 +0200 | [diff] [blame] | 1358 | /* This function returns the first unused key greater than or equal to <key> in |
| 1359 | * ID tree <root>. Zero is returned if no place is found. |
| 1360 | */ |
| 1361 | unsigned int get_next_id(struct eb_root *root, unsigned int key) |
| 1362 | { |
| 1363 | struct eb32_node *used; |
| 1364 | |
| 1365 | do { |
| 1366 | used = eb32_lookup_ge(root, key); |
| 1367 | if (!used || used->key > key) |
| 1368 | return key; /* key is available */ |
| 1369 | key++; |
| 1370 | } while (key); |
| 1371 | return key; |
| 1372 | } |
| 1373 | |
Willy Tarreau | 348238b | 2010-01-18 15:05:57 +0100 | [diff] [blame] | 1374 | /* This function compares a sample word possibly followed by blanks to another |
| 1375 | * clean word. The compare is case-insensitive. 1 is returned if both are equal, |
| 1376 | * otherwise zero. This intends to be used when checking HTTP headers for some |
| 1377 | * values. Note that it validates a word followed only by blanks but does not |
| 1378 | * validate a word followed by blanks then other chars. |
| 1379 | */ |
| 1380 | int word_match(const char *sample, int slen, const char *word, int wlen) |
| 1381 | { |
| 1382 | if (slen < wlen) |
| 1383 | return 0; |
| 1384 | |
| 1385 | while (wlen) { |
| 1386 | char c = *sample ^ *word; |
| 1387 | if (c && c != ('A' ^ 'a')) |
| 1388 | return 0; |
| 1389 | sample++; |
| 1390 | word++; |
| 1391 | slen--; |
| 1392 | wlen--; |
| 1393 | } |
| 1394 | |
| 1395 | while (slen) { |
| 1396 | if (*sample != ' ' && *sample != '\t') |
| 1397 | return 0; |
| 1398 | sample++; |
| 1399 | slen--; |
| 1400 | } |
| 1401 | return 1; |
| 1402 | } |
Willy Tarreau | 482b00d | 2009-10-04 22:48:42 +0200 | [diff] [blame] | 1403 | |
Willy Tarreau | d54bbdc | 2009-09-07 11:00:31 +0200 | [diff] [blame] | 1404 | /* Converts any text-formatted IPv4 address to a host-order IPv4 address. It |
| 1405 | * is particularly fast because it avoids expensive operations such as |
| 1406 | * multiplies, which are optimized away at the end. It requires a properly |
| 1407 | * formated address though (3 points). |
| 1408 | */ |
| 1409 | unsigned int inetaddr_host(const char *text) |
| 1410 | { |
| 1411 | const unsigned int ascii_zero = ('0' << 24) | ('0' << 16) | ('0' << 8) | '0'; |
| 1412 | register unsigned int dig100, dig10, dig1; |
| 1413 | int s; |
| 1414 | const char *p, *d; |
| 1415 | |
| 1416 | dig1 = dig10 = dig100 = ascii_zero; |
| 1417 | s = 24; |
| 1418 | |
| 1419 | p = text; |
| 1420 | while (1) { |
| 1421 | if (((unsigned)(*p - '0')) <= 9) { |
| 1422 | p++; |
| 1423 | continue; |
| 1424 | } |
| 1425 | |
| 1426 | /* here, we have a complete byte between <text> and <p> (exclusive) */ |
| 1427 | if (p == text) |
| 1428 | goto end; |
| 1429 | |
| 1430 | d = p - 1; |
| 1431 | dig1 |= (unsigned int)(*d << s); |
| 1432 | if (d == text) |
| 1433 | goto end; |
| 1434 | |
| 1435 | d--; |
| 1436 | dig10 |= (unsigned int)(*d << s); |
| 1437 | if (d == text) |
| 1438 | goto end; |
| 1439 | |
| 1440 | d--; |
| 1441 | dig100 |= (unsigned int)(*d << s); |
| 1442 | end: |
| 1443 | if (!s || *p != '.') |
| 1444 | break; |
| 1445 | |
| 1446 | s -= 8; |
| 1447 | text = ++p; |
| 1448 | } |
| 1449 | |
| 1450 | dig100 -= ascii_zero; |
| 1451 | dig10 -= ascii_zero; |
| 1452 | dig1 -= ascii_zero; |
| 1453 | return ((dig100 * 10) + dig10) * 10 + dig1; |
| 1454 | } |
| 1455 | |
| 1456 | /* |
| 1457 | * Idem except the first unparsed character has to be passed in <stop>. |
| 1458 | */ |
| 1459 | unsigned int inetaddr_host_lim(const char *text, const char *stop) |
| 1460 | { |
| 1461 | const unsigned int ascii_zero = ('0' << 24) | ('0' << 16) | ('0' << 8) | '0'; |
| 1462 | register unsigned int dig100, dig10, dig1; |
| 1463 | int s; |
| 1464 | const char *p, *d; |
| 1465 | |
| 1466 | dig1 = dig10 = dig100 = ascii_zero; |
| 1467 | s = 24; |
| 1468 | |
| 1469 | p = text; |
| 1470 | while (1) { |
| 1471 | if (((unsigned)(*p - '0')) <= 9 && p < stop) { |
| 1472 | p++; |
| 1473 | continue; |
| 1474 | } |
| 1475 | |
| 1476 | /* here, we have a complete byte between <text> and <p> (exclusive) */ |
| 1477 | if (p == text) |
| 1478 | goto end; |
| 1479 | |
| 1480 | d = p - 1; |
| 1481 | dig1 |= (unsigned int)(*d << s); |
| 1482 | if (d == text) |
| 1483 | goto end; |
| 1484 | |
| 1485 | d--; |
| 1486 | dig10 |= (unsigned int)(*d << s); |
| 1487 | if (d == text) |
| 1488 | goto end; |
| 1489 | |
| 1490 | d--; |
| 1491 | dig100 |= (unsigned int)(*d << s); |
| 1492 | end: |
| 1493 | if (!s || p == stop || *p != '.') |
| 1494 | break; |
| 1495 | |
| 1496 | s -= 8; |
| 1497 | text = ++p; |
| 1498 | } |
| 1499 | |
| 1500 | dig100 -= ascii_zero; |
| 1501 | dig10 -= ascii_zero; |
| 1502 | dig1 -= ascii_zero; |
| 1503 | return ((dig100 * 10) + dig10) * 10 + dig1; |
| 1504 | } |
| 1505 | |
| 1506 | /* |
| 1507 | * Idem except the pointer to first unparsed byte is returned into <ret> which |
| 1508 | * must not be NULL. |
| 1509 | */ |
Willy Tarreau | 7417275 | 2010-10-15 23:21:42 +0200 | [diff] [blame] | 1510 | unsigned int inetaddr_host_lim_ret(char *text, char *stop, char **ret) |
Willy Tarreau | d54bbdc | 2009-09-07 11:00:31 +0200 | [diff] [blame] | 1511 | { |
| 1512 | const unsigned int ascii_zero = ('0' << 24) | ('0' << 16) | ('0' << 8) | '0'; |
| 1513 | register unsigned int dig100, dig10, dig1; |
| 1514 | int s; |
Willy Tarreau | 7417275 | 2010-10-15 23:21:42 +0200 | [diff] [blame] | 1515 | char *p, *d; |
Willy Tarreau | d54bbdc | 2009-09-07 11:00:31 +0200 | [diff] [blame] | 1516 | |
| 1517 | dig1 = dig10 = dig100 = ascii_zero; |
| 1518 | s = 24; |
| 1519 | |
| 1520 | p = text; |
| 1521 | while (1) { |
| 1522 | if (((unsigned)(*p - '0')) <= 9 && p < stop) { |
| 1523 | p++; |
| 1524 | continue; |
| 1525 | } |
| 1526 | |
| 1527 | /* here, we have a complete byte between <text> and <p> (exclusive) */ |
| 1528 | if (p == text) |
| 1529 | goto end; |
| 1530 | |
| 1531 | d = p - 1; |
| 1532 | dig1 |= (unsigned int)(*d << s); |
| 1533 | if (d == text) |
| 1534 | goto end; |
| 1535 | |
| 1536 | d--; |
| 1537 | dig10 |= (unsigned int)(*d << s); |
| 1538 | if (d == text) |
| 1539 | goto end; |
| 1540 | |
| 1541 | d--; |
| 1542 | dig100 |= (unsigned int)(*d << s); |
| 1543 | end: |
| 1544 | if (!s || p == stop || *p != '.') |
| 1545 | break; |
| 1546 | |
| 1547 | s -= 8; |
| 1548 | text = ++p; |
| 1549 | } |
| 1550 | |
| 1551 | *ret = p; |
| 1552 | dig100 -= ascii_zero; |
| 1553 | dig10 -= ascii_zero; |
| 1554 | dig1 -= ascii_zero; |
| 1555 | return ((dig100 * 10) + dig10) * 10 + dig1; |
| 1556 | } |
| 1557 | |
Willy Tarreau | f0b38bf | 2010-06-06 13:22:23 +0200 | [diff] [blame] | 1558 | /* Convert a fixed-length string to an IP address. Returns 0 in case of error, |
| 1559 | * or the number of chars read in case of success. Maybe this could be replaced |
| 1560 | * by one of the functions above. Also, apparently this function does not support |
| 1561 | * hosts above 255 and requires exactly 4 octets. |
| 1562 | */ |
| 1563 | int buf2ip(const char *buf, size_t len, struct in_addr *dst) |
| 1564 | { |
| 1565 | const char *addr; |
| 1566 | int saw_digit, octets, ch; |
| 1567 | u_char tmp[4], *tp; |
| 1568 | const char *cp = buf; |
| 1569 | |
| 1570 | saw_digit = 0; |
| 1571 | octets = 0; |
| 1572 | *(tp = tmp) = 0; |
| 1573 | |
| 1574 | for (addr = buf; addr - buf < len; addr++) { |
| 1575 | unsigned char digit = (ch = *addr) - '0'; |
| 1576 | |
| 1577 | if (digit > 9 && ch != '.') |
| 1578 | break; |
| 1579 | |
| 1580 | if (digit <= 9) { |
| 1581 | u_int new = *tp * 10 + digit; |
| 1582 | |
| 1583 | if (new > 255) |
| 1584 | return 0; |
| 1585 | |
| 1586 | *tp = new; |
| 1587 | |
| 1588 | if (!saw_digit) { |
| 1589 | if (++octets > 4) |
| 1590 | return 0; |
| 1591 | saw_digit = 1; |
| 1592 | } |
| 1593 | } else if (ch == '.' && saw_digit) { |
| 1594 | if (octets == 4) |
| 1595 | return 0; |
| 1596 | |
| 1597 | *++tp = 0; |
| 1598 | saw_digit = 0; |
| 1599 | } else |
| 1600 | return 0; |
| 1601 | } |
| 1602 | |
| 1603 | if (octets < 4) |
| 1604 | return 0; |
| 1605 | |
| 1606 | memcpy(&dst->s_addr, tmp, 4); |
| 1607 | return addr - cp; |
| 1608 | } |
| 1609 | |
Willy Tarreau | acf9577 | 2010-06-14 19:09:21 +0200 | [diff] [blame] | 1610 | /* To be used to quote config arg positions. Returns the short string at <ptr> |
| 1611 | * surrounded by simple quotes if <ptr> is valid and non-empty, or "end of line" |
| 1612 | * if ptr is NULL or empty. The string is locally allocated. |
| 1613 | */ |
| 1614 | const char *quote_arg(const char *ptr) |
| 1615 | { |
| 1616 | static char val[32]; |
| 1617 | int i; |
| 1618 | |
| 1619 | if (!ptr || !*ptr) |
| 1620 | return "end of line"; |
| 1621 | val[0] = '\''; |
Willy Tarreau | de2dd6b | 2013-01-24 02:14:42 +0100 | [diff] [blame] | 1622 | for (i = 1; i < sizeof(val) - 2 && *ptr; i++) |
Willy Tarreau | acf9577 | 2010-06-14 19:09:21 +0200 | [diff] [blame] | 1623 | val[i] = *ptr++; |
| 1624 | val[i++] = '\''; |
| 1625 | val[i] = '\0'; |
| 1626 | return val; |
| 1627 | } |
| 1628 | |
Willy Tarreau | 5b18020 | 2010-07-18 10:40:48 +0200 | [diff] [blame] | 1629 | /* returns an operator among STD_OP_* for string <str> or < 0 if unknown */ |
| 1630 | int get_std_op(const char *str) |
| 1631 | { |
| 1632 | int ret = -1; |
| 1633 | |
| 1634 | if (*str == 'e' && str[1] == 'q') |
| 1635 | ret = STD_OP_EQ; |
| 1636 | else if (*str == 'n' && str[1] == 'e') |
| 1637 | ret = STD_OP_NE; |
| 1638 | else if (*str == 'l') { |
| 1639 | if (str[1] == 'e') ret = STD_OP_LE; |
| 1640 | else if (str[1] == 't') ret = STD_OP_LT; |
| 1641 | } |
| 1642 | else if (*str == 'g') { |
| 1643 | if (str[1] == 'e') ret = STD_OP_GE; |
| 1644 | else if (str[1] == 't') ret = STD_OP_GT; |
| 1645 | } |
| 1646 | |
| 1647 | if (ret == -1 || str[2] != '\0') |
| 1648 | return -1; |
| 1649 | return ret; |
| 1650 | } |
| 1651 | |
Willy Tarreau | 4c14eaa | 2010-11-24 14:01:45 +0100 | [diff] [blame] | 1652 | /* hash a 32-bit integer to another 32-bit integer */ |
| 1653 | unsigned int full_hash(unsigned int a) |
| 1654 | { |
| 1655 | return __full_hash(a); |
| 1656 | } |
| 1657 | |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 1658 | /* Return non-zero if IPv4 address is part of the network, |
| 1659 | * otherwise zero. |
| 1660 | */ |
| 1661 | int in_net_ipv4(struct in_addr *addr, struct in_addr *mask, struct in_addr *net) |
| 1662 | { |
| 1663 | return((addr->s_addr & mask->s_addr) == (net->s_addr & mask->s_addr)); |
| 1664 | } |
| 1665 | |
| 1666 | /* Return non-zero if IPv6 address is part of the network, |
| 1667 | * otherwise zero. |
| 1668 | */ |
| 1669 | int in_net_ipv6(struct in6_addr *addr, struct in6_addr *mask, struct in6_addr *net) |
| 1670 | { |
| 1671 | int i; |
| 1672 | |
| 1673 | for (i = 0; i < sizeof(struct in6_addr) / sizeof(int); i++) |
| 1674 | if (((((int *)addr)[i] & ((int *)mask)[i])) != |
| 1675 | (((int *)net)[i] & ((int *)mask)[i])) |
| 1676 | return 0; |
| 1677 | return 1; |
| 1678 | } |
| 1679 | |
| 1680 | /* RFC 4291 prefix */ |
| 1681 | const char rfc4291_pfx[] = { 0x00, 0x00, 0x00, 0x00, |
| 1682 | 0x00, 0x00, 0x00, 0x00, |
| 1683 | 0x00, 0x00, 0xFF, 0xFF }; |
| 1684 | |
| 1685 | /* Map IPv4 adress on IPv6 address, as specified in RFC 3513. */ |
| 1686 | void v4tov6(struct in6_addr *sin6_addr, struct in_addr *sin_addr) |
| 1687 | { |
| 1688 | memcpy(sin6_addr->s6_addr, rfc4291_pfx, sizeof(rfc4291_pfx)); |
| 1689 | memcpy(sin6_addr->s6_addr+12, &sin_addr->s_addr, 4); |
| 1690 | } |
| 1691 | |
| 1692 | /* Map IPv6 adress on IPv4 address, as specified in RFC 3513. |
| 1693 | * Return true if conversion is possible and false otherwise. |
| 1694 | */ |
| 1695 | int v6tov4(struct in_addr *sin_addr, struct in6_addr *sin6_addr) |
| 1696 | { |
| 1697 | if (memcmp(sin6_addr->s6_addr, rfc4291_pfx, sizeof(rfc4291_pfx)) == 0) { |
| 1698 | memcpy(&(sin_addr->s_addr), &(sin6_addr->s6_addr[12]), |
| 1699 | sizeof(struct in_addr)); |
| 1700 | return 1; |
| 1701 | } |
| 1702 | |
| 1703 | return 0; |
| 1704 | } |
| 1705 | |
William Lallemand | 421f5b5 | 2012-02-06 18:15:57 +0100 | [diff] [blame] | 1706 | char *human_time(int t, short hz_div) { |
| 1707 | static char rv[sizeof("24855d23h")+1]; // longest of "23h59m" and "59m59s" |
| 1708 | char *p = rv; |
| 1709 | int cnt=2; // print two numbers |
| 1710 | |
| 1711 | if (unlikely(t < 0 || hz_div <= 0)) { |
| 1712 | sprintf(p, "?"); |
| 1713 | return rv; |
| 1714 | } |
| 1715 | |
| 1716 | if (unlikely(hz_div > 1)) |
| 1717 | t /= hz_div; |
| 1718 | |
| 1719 | if (t >= DAY) { |
| 1720 | p += sprintf(p, "%dd", t / DAY); |
| 1721 | cnt--; |
| 1722 | } |
| 1723 | |
| 1724 | if (cnt && t % DAY / HOUR) { |
| 1725 | p += sprintf(p, "%dh", t % DAY / HOUR); |
| 1726 | cnt--; |
| 1727 | } |
| 1728 | |
| 1729 | if (cnt && t % HOUR / MINUTE) { |
| 1730 | p += sprintf(p, "%dm", t % HOUR / MINUTE); |
| 1731 | cnt--; |
| 1732 | } |
| 1733 | |
| 1734 | if ((cnt && t % MINUTE) || !t) // also display '0s' |
| 1735 | p += sprintf(p, "%ds", t % MINUTE / SEC); |
| 1736 | |
| 1737 | return rv; |
| 1738 | } |
| 1739 | |
| 1740 | const char *monthname[12] = { |
| 1741 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 1742 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
| 1743 | }; |
| 1744 | |
| 1745 | /* date2str_log: write a date in the format : |
| 1746 | * sprintf(str, "%02d/%s/%04d:%02d:%02d:%02d.%03d", |
| 1747 | * tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900, |
| 1748 | * tm.tm_hour, tm.tm_min, tm.tm_sec, (int)date.tv_usec/1000); |
| 1749 | * |
| 1750 | * without using sprintf. return a pointer to the last char written (\0) or |
| 1751 | * NULL if there isn't enough space. |
| 1752 | */ |
| 1753 | char *date2str_log(char *dst, struct tm *tm, struct timeval *date, size_t size) |
| 1754 | { |
| 1755 | |
| 1756 | if (size < 25) /* the size is fixed: 24 chars + \0 */ |
| 1757 | return NULL; |
| 1758 | |
| 1759 | dst = utoa_pad((unsigned int)tm->tm_mday, dst, 3); // day |
| 1760 | *dst++ = '/'; |
| 1761 | memcpy(dst, monthname[tm->tm_mon], 3); // month |
| 1762 | dst += 3; |
| 1763 | *dst++ = '/'; |
| 1764 | dst = utoa_pad((unsigned int)tm->tm_year+1900, dst, 5); // year |
| 1765 | *dst++ = ':'; |
| 1766 | dst = utoa_pad((unsigned int)tm->tm_hour, dst, 3); // hour |
| 1767 | *dst++ = ':'; |
| 1768 | dst = utoa_pad((unsigned int)tm->tm_min, dst, 3); // minutes |
| 1769 | *dst++ = ':'; |
| 1770 | dst = utoa_pad((unsigned int)tm->tm_sec, dst, 3); // secondes |
| 1771 | *dst++ = '.'; |
| 1772 | utoa_pad((unsigned int)(date->tv_usec/1000), dst, 4); // millisecondes |
| 1773 | dst += 3; // only the 3 first digits |
| 1774 | *dst = '\0'; |
| 1775 | |
| 1776 | return dst; |
| 1777 | } |
| 1778 | |
| 1779 | /* gmt2str_log: write a date in the format : |
| 1780 | * "%02d/%s/%04d:%02d:%02d:%02d +0000" without using snprintf |
| 1781 | * return a pointer to the last char written (\0) or |
| 1782 | * NULL if there isn't enough space. |
| 1783 | */ |
| 1784 | char *gmt2str_log(char *dst, struct tm *tm, size_t size) |
| 1785 | { |
Yuxans Yao | 4e25b01 | 2012-10-19 10:36:09 +0800 | [diff] [blame] | 1786 | if (size < 27) /* the size is fixed: 26 chars + \0 */ |
William Lallemand | 421f5b5 | 2012-02-06 18:15:57 +0100 | [diff] [blame] | 1787 | return NULL; |
| 1788 | |
| 1789 | dst = utoa_pad((unsigned int)tm->tm_mday, dst, 3); // day |
| 1790 | *dst++ = '/'; |
| 1791 | memcpy(dst, monthname[tm->tm_mon], 3); // month |
| 1792 | dst += 3; |
| 1793 | *dst++ = '/'; |
| 1794 | dst = utoa_pad((unsigned int)tm->tm_year+1900, dst, 5); // year |
| 1795 | *dst++ = ':'; |
| 1796 | dst = utoa_pad((unsigned int)tm->tm_hour, dst, 3); // hour |
| 1797 | *dst++ = ':'; |
| 1798 | dst = utoa_pad((unsigned int)tm->tm_min, dst, 3); // minutes |
| 1799 | *dst++ = ':'; |
| 1800 | dst = utoa_pad((unsigned int)tm->tm_sec, dst, 3); // secondes |
| 1801 | *dst++ = ' '; |
| 1802 | *dst++ = '+'; |
| 1803 | *dst++ = '0'; |
| 1804 | *dst++ = '0'; |
| 1805 | *dst++ = '0'; |
| 1806 | *dst++ = '0'; |
| 1807 | *dst = '\0'; |
| 1808 | |
| 1809 | return dst; |
| 1810 | } |
| 1811 | |
Yuxans Yao | 4e25b01 | 2012-10-19 10:36:09 +0800 | [diff] [blame] | 1812 | /* localdate2str_log: write a date in the format : |
| 1813 | * "%02d/%s/%04d:%02d:%02d:%02d +0000(local timezone)" without using snprintf |
| 1814 | * * return a pointer to the last char written (\0) or |
| 1815 | * * NULL if there isn't enough space. |
| 1816 | */ |
| 1817 | char *localdate2str_log(char *dst, struct tm *tm, size_t size) |
| 1818 | { |
| 1819 | if (size < 27) /* the size is fixed: 26 chars + \0 */ |
| 1820 | return NULL; |
| 1821 | |
| 1822 | dst = utoa_pad((unsigned int)tm->tm_mday, dst, 3); // day |
| 1823 | *dst++ = '/'; |
| 1824 | memcpy(dst, monthname[tm->tm_mon], 3); // month |
| 1825 | dst += 3; |
| 1826 | *dst++ = '/'; |
| 1827 | dst = utoa_pad((unsigned int)tm->tm_year+1900, dst, 5); // year |
| 1828 | *dst++ = ':'; |
| 1829 | dst = utoa_pad((unsigned int)tm->tm_hour, dst, 3); // hour |
| 1830 | *dst++ = ':'; |
| 1831 | dst = utoa_pad((unsigned int)tm->tm_min, dst, 3); // minutes |
| 1832 | *dst++ = ':'; |
| 1833 | dst = utoa_pad((unsigned int)tm->tm_sec, dst, 3); // secondes |
| 1834 | *dst++ = ' '; |
| 1835 | memcpy(dst, localtimezone, 5); // timezone |
| 1836 | dst += 5; |
| 1837 | *dst = '\0'; |
| 1838 | |
| 1839 | return dst; |
| 1840 | } |
| 1841 | |
Willy Tarreau | 9a7bea5 | 2012-04-27 11:16:50 +0200 | [diff] [blame] | 1842 | /* Dynamically allocates a string of the proper length to hold the formatted |
| 1843 | * output. NULL is returned on error. The caller is responsible for freeing the |
| 1844 | * memory area using free(). The resulting string is returned in <out> if the |
| 1845 | * pointer is not NULL. A previous version of <out> might be used to build the |
| 1846 | * new string, and it will be freed before returning if it is not NULL, which |
| 1847 | * makes it possible to build complex strings from iterative calls without |
| 1848 | * having to care about freeing intermediate values, as in the example below : |
| 1849 | * |
| 1850 | * memprintf(&err, "invalid argument: '%s'", arg); |
| 1851 | * ... |
| 1852 | * memprintf(&err, "parser said : <%s>\n", *err); |
| 1853 | * ... |
| 1854 | * free(*err); |
| 1855 | * |
| 1856 | * This means that <err> must be initialized to NULL before first invocation. |
| 1857 | * The return value also holds the allocated string, which eases error checking |
| 1858 | * and immediate consumption. If the output pointer is not used, NULL must be |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1859 | * passed instead and it will be ignored. The returned message will then also |
| 1860 | * be NULL so that the caller does not have to bother with freeing anything. |
Willy Tarreau | 9a7bea5 | 2012-04-27 11:16:50 +0200 | [diff] [blame] | 1861 | * |
| 1862 | * It is also convenient to use it without any free except the last one : |
| 1863 | * err = NULL; |
| 1864 | * if (!fct1(err)) report(*err); |
| 1865 | * if (!fct2(err)) report(*err); |
| 1866 | * if (!fct3(err)) report(*err); |
| 1867 | * free(*err); |
| 1868 | */ |
| 1869 | char *memprintf(char **out, const char *format, ...) |
| 1870 | { |
| 1871 | va_list args; |
| 1872 | char *ret = NULL; |
| 1873 | int allocated = 0; |
| 1874 | int needed = 0; |
| 1875 | |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1876 | if (!out) |
| 1877 | return NULL; |
| 1878 | |
Willy Tarreau | 9a7bea5 | 2012-04-27 11:16:50 +0200 | [diff] [blame] | 1879 | do { |
| 1880 | /* vsnprintf() will return the required length even when the |
| 1881 | * target buffer is NULL. We do this in a loop just in case |
| 1882 | * intermediate evaluations get wrong. |
| 1883 | */ |
| 1884 | va_start(args, format); |
| 1885 | needed = vsnprintf(ret, allocated, format, args) + 1; |
| 1886 | va_end(args); |
| 1887 | |
| 1888 | if (needed <= allocated) |
| 1889 | break; |
| 1890 | |
| 1891 | allocated = needed; |
| 1892 | ret = realloc(ret, allocated); |
| 1893 | } while (ret); |
| 1894 | |
| 1895 | if (needed < 0) { |
| 1896 | /* an error was encountered */ |
| 1897 | free(ret); |
| 1898 | ret = NULL; |
| 1899 | } |
| 1900 | |
| 1901 | if (out) { |
| 1902 | free(*out); |
| 1903 | *out = ret; |
| 1904 | } |
| 1905 | |
| 1906 | return ret; |
| 1907 | } |
William Lallemand | 421f5b5 | 2012-02-06 18:15:57 +0100 | [diff] [blame] | 1908 | |
Willy Tarreau | 21c705b | 2012-09-14 11:40:36 +0200 | [diff] [blame] | 1909 | /* Used to add <level> spaces before each line of <out>, unless there is only one line. |
| 1910 | * The input argument is automatically freed and reassigned. The result will have to be |
Willy Tarreau | 70eec38 | 2012-10-10 08:56:47 +0200 | [diff] [blame] | 1911 | * freed by the caller. It also supports being passed a NULL which results in the same |
| 1912 | * output. |
Willy Tarreau | 21c705b | 2012-09-14 11:40:36 +0200 | [diff] [blame] | 1913 | * Example of use : |
| 1914 | * parse(cmd, &err); (callee: memprintf(&err, ...)) |
| 1915 | * fprintf(stderr, "Parser said: %s\n", indent_error(&err)); |
| 1916 | * free(err); |
| 1917 | */ |
| 1918 | char *indent_msg(char **out, int level) |
| 1919 | { |
| 1920 | char *ret, *in, *p; |
| 1921 | int needed = 0; |
| 1922 | int lf = 0; |
| 1923 | int lastlf = 0; |
| 1924 | int len; |
| 1925 | |
Willy Tarreau | 70eec38 | 2012-10-10 08:56:47 +0200 | [diff] [blame] | 1926 | if (!out || !*out) |
| 1927 | return NULL; |
| 1928 | |
Willy Tarreau | 21c705b | 2012-09-14 11:40:36 +0200 | [diff] [blame] | 1929 | in = *out - 1; |
| 1930 | while ((in = strchr(in + 1, '\n')) != NULL) { |
| 1931 | lastlf = in - *out; |
| 1932 | lf++; |
| 1933 | } |
| 1934 | |
| 1935 | if (!lf) /* single line, no LF, return it as-is */ |
| 1936 | return *out; |
| 1937 | |
| 1938 | len = strlen(*out); |
| 1939 | |
| 1940 | if (lf == 1 && lastlf == len - 1) { |
| 1941 | /* single line, LF at end, strip it and return as-is */ |
| 1942 | (*out)[lastlf] = 0; |
| 1943 | return *out; |
| 1944 | } |
| 1945 | |
| 1946 | /* OK now we have at least one LF, we need to process the whole string |
| 1947 | * as a multi-line string. What we'll do : |
| 1948 | * - prefix with an LF if there is none |
| 1949 | * - add <level> spaces before each line |
| 1950 | * This means at most ( 1 + level + (len-lf) + lf*<1+level) ) = |
| 1951 | * 1 + level + len + lf * level = 1 + level * (lf + 1) + len. |
| 1952 | */ |
| 1953 | |
| 1954 | needed = 1 + level * (lf + 1) + len + 1; |
| 1955 | p = ret = malloc(needed); |
| 1956 | in = *out; |
| 1957 | |
| 1958 | /* skip initial LFs */ |
| 1959 | while (*in == '\n') |
| 1960 | in++; |
| 1961 | |
| 1962 | /* copy each line, prefixed with LF and <level> spaces, and without the trailing LF */ |
| 1963 | while (*in) { |
| 1964 | *p++ = '\n'; |
| 1965 | memset(p, ' ', level); |
| 1966 | p += level; |
| 1967 | do { |
| 1968 | *p++ = *in++; |
| 1969 | } while (*in && *in != '\n'); |
| 1970 | if (*in) |
| 1971 | in++; |
| 1972 | } |
| 1973 | *p = 0; |
| 1974 | |
| 1975 | free(*out); |
| 1976 | *out = ret; |
| 1977 | |
| 1978 | return ret; |
| 1979 | } |
| 1980 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1981 | /* |
| 1982 | * Local variables: |
| 1983 | * c-indent-level: 8 |
| 1984 | * c-basic-offset: 8 |
| 1985 | * End: |
| 1986 | */ |