| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* Copyright (c) University of Cambridge 1995 - 2009 */ |
| 6 | /* See the file NOTICE for conditions of use and distribution. */ |
| 7 | |
| 8 | |
| 9 | /* Code for mail filtering functions. */ |
| 10 | |
| 11 | #include "exim.h" |
| 12 | |
| 13 | |
| 14 | /* Command arguments and left/right points in conditions can contain different |
| 15 | types of data, depending on the particular command or condition. Originally, |
| 16 | (void *) was used as "any old type", with casts, but this gives trouble and |
| 17 | warnings in some environments. So now it is done "properly", with a union. We |
| 18 | need to declare the structures first because some of them are recursive. */ |
| 19 | |
| 20 | struct filter_cmd; |
| 21 | struct condition_block; |
| 22 | |
| 23 | union argtypes { |
| 24 | struct string_item *a; |
| 25 | BOOL b; |
| 26 | struct condition_block *c; |
| 27 | struct filter_cmd *f; |
| 28 | int i; |
| 29 | uschar *u; |
| 30 | }; |
| 31 | |
| 32 | /* Local structures used in this module */ |
| 33 | |
| 34 | typedef struct filter_cmd { |
| 35 | struct filter_cmd *next; |
| 36 | int command; |
| 37 | BOOL seen; |
| 38 | BOOL noerror; |
| 39 | union argtypes args[1]; |
| 40 | } filter_cmd; |
| 41 | |
| 42 | typedef struct condition_block { |
| 43 | struct condition_block *parent; |
| 44 | int type; |
| 45 | BOOL testfor; |
| 46 | union argtypes left; |
| 47 | union argtypes right; |
| 48 | } condition_block; |
| 49 | |
| 50 | /* Miscellaneous other declarations */ |
| 51 | |
| 52 | static uschar **error_pointer; |
| 53 | static uschar *log_filename; |
| 54 | static int filter_options; |
| 55 | static int line_number; |
| 56 | static int expect_endif; |
| 57 | static int had_else_endif; |
| 58 | static int log_fd; |
| 59 | static int log_mode; |
| 60 | static int output_indent; |
| 61 | static BOOL filter_delivered; |
| 62 | static BOOL finish_obeyed; |
| 63 | static BOOL seen_force; |
| 64 | static BOOL seen_value; |
| 65 | static BOOL noerror_force; |
| 66 | |
| 67 | enum { had_neither, had_else, had_elif, had_endif }; |
| 68 | |
| 69 | static BOOL read_command_list(uschar **, filter_cmd ***, BOOL); |
| 70 | |
| 71 | |
| 72 | /* The string arguments for the mail command. The header line ones (that are |
| 73 | permitted to include \n followed by white space) first, and then the body text |
| 74 | one (it can have \n anywhere). Then the file names and once_repeat, which may |
| 75 | not contain \n. */ |
| 76 | |
| 77 | static const char *mailargs[] = { /* "to" must be first, and */ |
| 78 | "to", /* "cc" and "bcc" must follow */ |
| 79 | "cc", |
| 80 | "bcc", |
| 81 | "from", |
| 82 | "reply_to", |
| 83 | "subject", |
| 84 | "extra_headers", /* miscellaneous added header lines */ |
| 85 | "text", |
| 86 | "file", |
| 87 | "log", |
| 88 | "once", |
| 89 | "once_repeat" |
| 90 | }; |
| 91 | |
| 92 | /* The count of string arguments */ |
| 93 | |
| 94 | #define MAILARGS_STRING_COUNT (sizeof(mailargs)/sizeof(uschar *)) |
| 95 | |
| 96 | /* The count of string arguments that are actually passed over as strings |
| 97 | (once_repeat is converted to an int). */ |
| 98 | |
| 99 | #define mailargs_string_passed (MAILARGS_STRING_COUNT - 1) |
| 100 | |
| 101 | /* This defines the offsets for the arguments; first the string ones, and |
| 102 | then the non-string ones. The order must be as above. */ |
| 103 | |
| 104 | enum { mailarg_index_to, |
| 105 | mailarg_index_cc, |
| 106 | mailarg_index_bcc, |
| 107 | mailarg_index_from, |
| 108 | mailarg_index_reply_to, |
| 109 | mailarg_index_subject, |
| 110 | mailarg_index_headers, /* misc headers must be last */ |
| 111 | mailarg_index_text, /* text is first after headers */ |
| 112 | mailarg_index_file, /* between text and expand are filenames */ |
| 113 | mailarg_index_log, |
| 114 | mailarg_index_once, |
| 115 | mailarg_index_once_repeat, /* a time string */ |
| 116 | mailarg_index_expand, /* first non-string argument */ |
| 117 | mailarg_index_return, |
| 118 | mailargs_total /* total number of arguments */ |
| 119 | }; |
| 120 | |
| 121 | /* Offsets in the data structure for the string arguments (note that |
| 122 | once_repeat isn't a string argument at this point.) */ |
| 123 | |
| 124 | static int reply_offsets[] = { /* must be in same order as above */ |
| 125 | offsetof(reply_item, to), |
| 126 | offsetof(reply_item, cc), |
| 127 | offsetof(reply_item, bcc), |
| 128 | offsetof(reply_item, from), |
| 129 | offsetof(reply_item, reply_to), |
| 130 | offsetof(reply_item, subject), |
| 131 | offsetof(reply_item, headers), |
| 132 | offsetof(reply_item, text), |
| 133 | offsetof(reply_item, file), |
| 134 | offsetof(reply_item, logfile), |
| 135 | offsetof(reply_item, oncelog), |
| 136 | }; |
| 137 | |
| 138 | /* Condition identities and names, with negated versions for some |
| 139 | of them. */ |
| 140 | |
| 141 | enum { cond_and, cond_or, cond_personal, cond_begins, cond_BEGINS, |
| 142 | cond_ends, cond_ENDS, cond_is, cond_IS, cond_matches, |
| 143 | cond_MATCHES, cond_contains, cond_CONTAINS, cond_delivered, |
| 144 | cond_above, cond_below, cond_errormsg, cond_firsttime, |
| 145 | cond_manualthaw, cond_foranyaddress }; |
| 146 | |
| 147 | static const char *cond_names[] = { |
| 148 | "and", "or", "personal", |
| 149 | "begins", "BEGINS", "ends", "ENDS", |
| 150 | "is", "IS", "matches", "MATCHES", "contains", |
| 151 | "CONTAINS", "delivered", "above", "below", "error_message", |
| 152 | "first_delivery", "manually_thawed", "foranyaddress" }; |
| 153 | |
| 154 | static const char *cond_not_names[] = { |
| 155 | "", "", "not personal", |
| 156 | "does not begin", "does not BEGIN", |
| 157 | "does not end", "does not END", |
| 158 | "is not", "IS not", "does not match", |
| 159 | "does not MATCH", "does not contain", "does not CONTAIN", |
| 160 | "not delivered", "not above", "not below", "not error_message", |
| 161 | "not first_delivery", "not manually_thawed", "not foranyaddress" }; |
| 162 | |
| 163 | /* Tables of binary condition words and their corresponding types. Not easy |
| 164 | to amalgamate with the above because of the different variants. */ |
| 165 | |
| 166 | static const char *cond_words[] = { |
| 167 | "BEGIN", |
| 168 | "BEGINS", |
| 169 | "CONTAIN", |
| 170 | "CONTAINS", |
| 171 | "END", |
| 172 | "ENDS", |
| 173 | "IS", |
| 174 | "MATCH", |
| 175 | "MATCHES", |
| 176 | "above", |
| 177 | "begin", |
| 178 | "begins", |
| 179 | "below", |
| 180 | "contain", |
| 181 | "contains", |
| 182 | "end", |
| 183 | "ends", |
| 184 | "is", |
| 185 | "match", |
| 186 | "matches"}; |
| 187 | |
| 188 | static int cond_word_count = (sizeof(cond_words)/sizeof(uschar *)); |
| 189 | |
| 190 | static int cond_types[] = { cond_BEGINS, cond_BEGINS, cond_CONTAINS, |
| 191 | cond_CONTAINS, cond_ENDS, cond_ENDS, cond_IS, cond_MATCHES, cond_MATCHES, |
| 192 | cond_above, cond_begins, cond_begins, cond_below, cond_contains, |
| 193 | cond_contains, cond_ends, cond_ends, cond_is, cond_matches, cond_matches }; |
| 194 | |
| 195 | /* Command identities: must be kept in step with the list of command words |
| 196 | and the list of expanded argument counts which follow. */ |
| 197 | |
| 198 | enum { add_command, defer_command, deliver_command, elif_command, else_command, |
| 199 | endif_command, finish_command, fail_command, freeze_command, |
| 200 | headers_command, if_command, logfile_command, logwrite_command, |
| 201 | mail_command, noerror_command, pipe_command, save_command, seen_command, |
| 202 | testprint_command, unseen_command, vacation_command }; |
| 203 | |
| 204 | static const char *command_list[] = { |
| 205 | "add", "defer", "deliver", "elif", "else", "endif", "finish", |
| 206 | "fail", "freeze", "headers", "if", "logfile", "logwrite", "mail", |
| 207 | "noerror", "pipe", "save", "seen", "testprint", "unseen", "vacation" |
| 208 | }; |
| 209 | |
| 210 | static int command_list_count = sizeof(command_list)/sizeof(uschar *); |
| 211 | |
| 212 | /* This table contains the number of expanded arguments in the bottom 4 bits. |
| 213 | If the top bit is set, it means that the default for the command is "seen". */ |
| 214 | |
| 215 | static uschar command_exparg_count[] = { |
| 216 | 2, /* add */ |
| 217 | 1, /* defer */ |
| 218 | 128+2, /* deliver */ |
| 219 | 0, /* elif */ |
| 220 | 0, /* else */ |
| 221 | 0, /* endif */ |
| 222 | 0, /* finish */ |
| 223 | 1, /* fail */ |
| 224 | 1, /* freeze */ |
| 225 | 1, /* headers */ |
| 226 | 0, /* if */ |
| 227 | 1, /* logfile */ |
| 228 | 1, /* logwrite */ |
| 229 | MAILARGS_STRING_COUNT, /* mail */ |
| 230 | 0, /* noerror */ |
| 231 | 128+0, /* pipe */ |
| 232 | 128+1, /* save */ |
| 233 | 0, /* seen */ |
| 234 | 1, /* testprint */ |
| 235 | 0, /* unseen */ |
| 236 | MAILARGS_STRING_COUNT /* vacation */ |
| 237 | }; |
| 238 | |
| 239 | |
| 240 | |
| 241 | /************************************************* |
| 242 | * Find next significant uschar * |
| 243 | *************************************************/ |
| 244 | |
| 245 | /* Function to skip over white space and, optionally, comments. |
| 246 | |
| 247 | Arguments: |
| 248 | ptr pointer to next character |
| 249 | comment_allowed if TRUE, comments (# to \n) are skipped |
| 250 | |
| 251 | Returns: pointer to next non-whitespace character |
| 252 | */ |
| 253 | |
| 254 | static uschar * |
| 255 | nextsigchar(uschar *ptr, BOOL comment_allowed) |
| 256 | { |
| 257 | for (;;) |
| 258 | { |
| 259 | while (isspace(*ptr)) |
| 260 | { |
| 261 | if (*ptr == '\n') line_number++; |
| 262 | ptr++; |
| 263 | } |
| 264 | if (comment_allowed && *ptr == '#') |
| 265 | { |
| 266 | while (*(++ptr) != '\n' && *ptr != 0); |
| 267 | continue; |
| 268 | } |
| 269 | else break; |
| 270 | } |
| 271 | return ptr; |
| 272 | } |
| 273 | |
| 274 | |
| 275 | |
| 276 | /************************************************* |
| 277 | * Read one word * |
| 278 | *************************************************/ |
| 279 | |
| 280 | /* The terminator is white space unless bracket is TRUE, in which |
| 281 | case ( and ) terminate. |
| 282 | |
| 283 | Arguments |
| 284 | ptr pointer to next character |
| 285 | buffer where to put the word |
| 286 | size size of buffer |
| 287 | bracket if TRUE, terminate on ( and ) as well as space |
| 288 | |
| 289 | Returns: pointer to the next significant character after the word |
| 290 | */ |
| 291 | |
| 292 | static uschar * |
| 293 | nextword(uschar *ptr, uschar *buffer, int size, BOOL bracket) |
| 294 | { |
| 295 | uschar *bp = buffer; |
| 296 | while (*ptr != 0 && !isspace(*ptr) && |
| 297 | (!bracket || (*ptr != '(' && *ptr != ')'))) |
| 298 | { |
| 299 | if (bp - buffer < size - 1) *bp++ = *ptr++; else |
| 300 | { |
| 301 | *error_pointer = string_sprintf("word is too long in line %d of " |
| 302 | "filter file (max = %d chars)", line_number, size); |
| 303 | break; |
| 304 | } |
| 305 | } |
| 306 | *bp = 0; |
| 307 | return nextsigchar(ptr, TRUE); |
| 308 | } |
| 309 | |
| 310 | |
| 311 | |
| 312 | /************************************************* |
| 313 | * Read one item * |
| 314 | *************************************************/ |
| 315 | |
| 316 | /* Might be a word, or might be a quoted string; in the latter case |
| 317 | do the escape stuff. |
| 318 | |
| 319 | Arguments: |
| 320 | ptr pointer to next character |
| 321 | buffer where to put the item |
| 322 | size size of buffer |
| 323 | bracket if TRUE, terminate non-quoted on ( and ) as well as space |
| 324 | |
| 325 | Returns: the next significant character after the item |
| 326 | */ |
| 327 | |
| 328 | static uschar * |
| 329 | nextitem(uschar *ptr, uschar *buffer, int size, BOOL bracket) |
| 330 | { |
| 331 | uschar *bp = buffer; |
| 332 | if (*ptr != '\"') return nextword(ptr, buffer, size, bracket); |
| 333 | |
| 334 | while (*(++ptr) != 0 && *ptr != '\"' && *ptr != '\n') |
| 335 | { |
| 336 | if (bp - buffer >= size - 1) |
| 337 | { |
| 338 | *error_pointer = string_sprintf("string is too long in line %d of " |
| 339 | "filter file (max = %d chars)", line_number, size); |
| 340 | break; |
| 341 | } |
| 342 | |
| 343 | if (*ptr != '\\') *bp++ = *ptr; else |
| 344 | { |
| 345 | if (isspace(ptr[1])) /* \<whitespace>NL<whitespace> ignored */ |
| 346 | { |
| 347 | uschar *p = ptr + 1; |
| 348 | while (*p != '\n' && isspace(*p)) p++; |
| 349 | if (*p == '\n') |
| 350 | { |
| 351 | line_number++; |
| 352 | ptr = p; |
| 353 | while (ptr[1] != '\n' && isspace(ptr[1])) ptr++; |
| 354 | continue; |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | *bp++ = string_interpret_escape(&ptr); |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | if (*ptr == '\"') ptr++; |
| 363 | else if (*error_pointer == NULL) |
| 364 | *error_pointer = string_sprintf("quote missing at end of string " |
| 365 | "in line %d", line_number); |
| 366 | |
| 367 | *bp = 0; |
| 368 | return nextsigchar(ptr, TRUE); |
| 369 | } |
| 370 | |
| 371 | |
| 372 | |
| 373 | |
| 374 | /************************************************* |
| 375 | * Convert a string + K|M to a number * |
| 376 | *************************************************/ |
| 377 | |
| 378 | /* |
| 379 | Arguments: |
| 380 | s points to text string |
| 381 | OK set TRUE if a valid number was read |
| 382 | |
| 383 | Returns: the number, or 0 on error (with *OK FALSE) |
| 384 | */ |
| 385 | |
| 386 | static int |
| 387 | get_number(uschar *s, BOOL *ok) |
| 388 | { |
| 389 | int value, count; |
| 390 | *ok = FALSE; |
| 391 | if (sscanf(CS s, "%i%n", &value, &count) != 1) return 0; |
| 392 | if (tolower(s[count]) == 'k') { value *= 1024; count++; } |
| 393 | if (tolower(s[count]) == 'm') { value *= 1024*1024; count++; } |
| 394 | while (isspace((s[count]))) count++; |
| 395 | if (s[count] != 0) return 0; |
| 396 | *ok = TRUE; |
| 397 | return value; |
| 398 | } |
| 399 | |
| 400 | |
| 401 | |
| 402 | /************************************************* |
| 403 | * Read one condition * |
| 404 | *************************************************/ |
| 405 | |
| 406 | /* A complete condition must be terminated by "then"; bracketed internal |
| 407 | conditions must be terminated by a closing bracket. They are read by calling |
| 408 | this function recursively. |
| 409 | |
| 410 | Arguments: |
| 411 | ptr points to start of condition |
| 412 | condition_block where to hang the created condition block |
| 413 | toplevel TRUE when called at the top level |
| 414 | |
| 415 | Returns: points to next character after "then" |
| 416 | */ |
| 417 | |
| 418 | static uschar * |
| 419 | read_condition(uschar *ptr, condition_block **cond, BOOL toplevel) |
| 420 | { |
| 421 | uschar buffer[1024]; |
| 422 | BOOL testfor = TRUE; |
| 423 | condition_block *current_parent = NULL; |
| 424 | condition_block **current = cond; |
| 425 | |
| 426 | *current = NULL; |
| 427 | |
| 428 | /* Loop to read next condition */ |
| 429 | |
| 430 | for (;;) |
| 431 | { |
| 432 | condition_block *c; |
| 433 | |
| 434 | /* reaching the end of the input is an error. */ |
| 435 | |
| 436 | if (*ptr == 0) |
| 437 | { |
| 438 | *error_pointer = string_sprintf("\"then\" missing at end of filter file"); |
| 439 | break; |
| 440 | } |
| 441 | |
| 442 | /* Opening bracket at the start of a condition introduces a nested |
| 443 | condition, which must be terminated by a closing bracket. */ |
| 444 | |
| 445 | if (*ptr == '(') |
| 446 | { |
| 447 | ptr = read_condition(nextsigchar(ptr+1, TRUE), &c, FALSE); |
| 448 | if (*error_pointer != NULL) break; |
| 449 | if (*ptr != ')') |
| 450 | { |
| 451 | *error_pointer = string_sprintf("expected \")\" in line %d of " |
| 452 | "filter file", line_number); |
| 453 | break; |
| 454 | } |
| 455 | if (!testfor) |
| 456 | { |
| 457 | c->testfor = !c->testfor; |
| 458 | testfor = TRUE; |
| 459 | } |
| 460 | ptr = nextsigchar(ptr+1, TRUE); |
| 461 | } |
| 462 | |
| 463 | |
| 464 | /* Closing bracket at the start of a condition is an error. Give an |
| 465 | explicit message, as otherwise "unknown condition" would be confusing. */ |
| 466 | |
| 467 | else if (*ptr == ')') |
| 468 | { |
| 469 | *error_pointer = string_sprintf("unexpected \")\" in line %d of " |
| 470 | "filter file", line_number); |
| 471 | break; |
| 472 | } |
| 473 | |
| 474 | /* Otherwise we expect a word or a string. */ |
| 475 | |
| 476 | else |
| 477 | { |
| 478 | ptr = nextitem(ptr, buffer, sizeof(buffer), TRUE); |
| 479 | if (*error_pointer != NULL) break; |
| 480 | |
| 481 | /* "Then" at the start of a condition is an error */ |
| 482 | |
| 483 | if (Ustrcmp(buffer, "then") == 0) |
| 484 | { |
| 485 | *error_pointer = string_sprintf("unexpected \"then\" near line %d of " |
| 486 | "filter file", line_number); |
| 487 | break; |
| 488 | } |
| 489 | |
| 490 | /* "Not" at the start of a condition negates the testing condition. */ |
| 491 | |
| 492 | if (Ustrcmp(buffer, "not") == 0) |
| 493 | { |
| 494 | testfor = !testfor; |
| 495 | continue; |
| 496 | } |
| 497 | |
| 498 | /* Build a condition block from the specific word. */ |
| 499 | |
| 500 | c = store_get(sizeof(condition_block)); |
| 501 | c->left.u = c->right.u = NULL; |
| 502 | c->testfor = testfor; |
| 503 | testfor = TRUE; |
| 504 | |
| 505 | /* Check for conditions that start with a keyword */ |
| 506 | |
| 507 | if (Ustrcmp(buffer, "delivered") == 0) c->type = cond_delivered; |
| 508 | else if (Ustrcmp(buffer, "error_message") == 0) c->type = cond_errormsg; |
| 509 | else if (Ustrcmp(buffer, "first_delivery") == 0) c->type = cond_firsttime; |
| 510 | else if (Ustrcmp(buffer, "manually_thawed") == 0) c->type = cond_manualthaw; |
| 511 | |
| 512 | /* Personal can be followed by any number of aliases */ |
| 513 | |
| 514 | else if (Ustrcmp(buffer, "personal") == 0) |
| 515 | { |
| 516 | c->type = cond_personal; |
| 517 | for (;;) |
| 518 | { |
| 519 | string_item *aa; |
| 520 | uschar *saveptr = ptr; |
| 521 | ptr = nextword(ptr, buffer, sizeof(buffer), TRUE); |
| 522 | if (*error_pointer != NULL) break; |
| 523 | if (Ustrcmp(buffer, "alias") != 0) |
| 524 | { |
| 525 | ptr = saveptr; |
| 526 | break; |
| 527 | } |
| 528 | ptr = nextitem(ptr, buffer, sizeof(buffer), TRUE); |
| 529 | if (*error_pointer != NULL) break; |
| 530 | aa = store_get(sizeof(string_item)); |
| 531 | aa->text = string_copy(buffer); |
| 532 | aa->next = c->left.a; |
| 533 | c->left.a = aa; |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | /* Foranyaddress must be followed by a string and a condition enclosed |
| 538 | in parentheses, which is handled as a subcondition. */ |
| 539 | |
| 540 | else if (Ustrcmp(buffer, "foranyaddress") == 0) |
| 541 | { |
| 542 | ptr = nextitem(ptr, buffer, sizeof(buffer), TRUE); |
| 543 | if (*error_pointer != NULL) break; |
| 544 | if (*ptr != '(') |
| 545 | { |
| 546 | *error_pointer = string_sprintf("\"(\" expected after \"foranyaddress\" " |
| 547 | "near line %d of filter file", line_number); |
| 548 | break; |
| 549 | } |
| 550 | |
| 551 | c->type = cond_foranyaddress; |
| 552 | c->left.u = string_copy(buffer); |
| 553 | |
| 554 | ptr = read_condition(nextsigchar(ptr+1, TRUE), &(c->right.c), FALSE); |
| 555 | if (*error_pointer != NULL) break; |
| 556 | if (*ptr != ')') |
| 557 | { |
| 558 | *error_pointer = string_sprintf("expected \")\" in line %d of " |
| 559 | "filter file", line_number); |
| 560 | break; |
| 561 | } |
| 562 | if (!testfor) |
| 563 | { |
| 564 | c->testfor = !c->testfor; |
| 565 | testfor = TRUE; |
| 566 | } |
| 567 | ptr = nextsigchar(ptr+1, TRUE); |
| 568 | } |
| 569 | |
| 570 | /* If it's not a word we recognize, then it must be the lefthand |
| 571 | operand of one of the comparison words. */ |
| 572 | |
| 573 | else |
| 574 | { |
| 575 | int i; |
| 576 | uschar *isptr = NULL; |
| 577 | |
| 578 | c->left.u = string_copy(buffer); |
| 579 | ptr = nextword(ptr, buffer, sizeof(buffer), TRUE); |
| 580 | if (*error_pointer != NULL) break; |
| 581 | |
| 582 | /* Handle "does|is [not]", preserving the pointer after "is" in |
| 583 | case it isn't that, but the form "is <string>". */ |
| 584 | |
| 585 | if (strcmpic(buffer, US"does") == 0 || strcmpic(buffer, US"is") == 0) |
| 586 | { |
| 587 | if (buffer[0] == 'i') { c->type = cond_is; isptr = ptr; } |
| 588 | if (buffer[0] == 'I') { c->type = cond_IS; isptr = ptr; } |
| 589 | |
| 590 | ptr = nextword(ptr, buffer, sizeof(buffer), TRUE); |
| 591 | if (*error_pointer != NULL) break; |
| 592 | if (strcmpic(buffer, US"not") == 0) |
| 593 | { |
| 594 | c->testfor = !c->testfor; |
| 595 | if (isptr != NULL) isptr = ptr; |
| 596 | ptr = nextword(ptr, buffer, sizeof(buffer), TRUE); |
| 597 | if (*error_pointer != NULL) break; |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | for (i = 0; i < cond_word_count; i++) |
| 602 | { |
| 603 | if (Ustrcmp(buffer, cond_words[i]) == 0) |
| 604 | { |
| 605 | c->type = cond_types[i]; |
| 606 | break; |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | /* If an unknown word follows "is" or "is not" |
| 611 | it's actually the argument. Reset to read it. */ |
| 612 | |
| 613 | if (i >= cond_word_count) |
| 614 | { |
| 615 | if (isptr != NULL) |
| 616 | { |
| 617 | ptr = isptr; |
| 618 | } |
| 619 | else |
| 620 | { |
| 621 | *error_pointer = string_sprintf("unrecognized condition word \"%s\" " |
| 622 | "near line %d of filter file", buffer, line_number); |
| 623 | break; |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | /* Get the RH argument. */ |
| 628 | |
| 629 | ptr = nextitem(ptr, buffer, sizeof(buffer), TRUE); |
| 630 | if (*error_pointer != NULL) break; |
| 631 | c->right.u = string_copy(buffer); |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | /* We have read some new condition and set it up in the condition block |
| 636 | c; point the current pointer at it, and then deal with what follows. */ |
| 637 | |
| 638 | *current = c; |
| 639 | |
| 640 | /* Closing bracket terminates if this is a lower-level condition. Otherwise |
| 641 | it is unexpected. */ |
| 642 | |
| 643 | if (*ptr == ')') |
| 644 | { |
| 645 | if (toplevel) |
| 646 | *error_pointer = string_sprintf("unexpected \")\" in line %d of " |
| 647 | "filter file", line_number); |
| 648 | break; |
| 649 | } |
| 650 | |
| 651 | /* Opening bracket following a condition is an error; give an explicit |
| 652 | message to make it clearer what is wrong. */ |
| 653 | |
| 654 | else if (*ptr == '(') |
| 655 | { |
| 656 | *error_pointer = string_sprintf("unexpected \"(\" in line %d of " |
| 657 | "filter file", line_number); |
| 658 | break; |
| 659 | } |
| 660 | |
| 661 | /* Otherwise the next thing must be one of the words "and", "or" or "then" */ |
| 662 | |
| 663 | else |
| 664 | { |
| 665 | uschar *saveptr = ptr; |
| 666 | ptr = nextword(ptr, buffer, sizeof(buffer), FALSE); |
| 667 | if (*error_pointer != NULL) break; |
| 668 | |
| 669 | /* "Then" terminates a toplevel condition; otherwise a closing bracket |
| 670 | has been omitted. Put a string terminator at the start of "then" so |
| 671 | that reflecting the condition can be done when testing. */ |
| 672 | |
| 673 | if (Ustrcmp(buffer, "then") == 0) |
| 674 | { |
| 675 | if (toplevel) *saveptr = 0; |
| 676 | else *error_pointer = string_sprintf("missing \")\" at end of " |
| 677 | "condition near line %d of filter file", line_number); |
| 678 | break; |
| 679 | } |
| 680 | |
| 681 | /* "And" causes a new condition block to replace the one we have |
| 682 | just read, which becomes the left sub-condition. The current pointer |
| 683 | is reset to the pointer for the right sub-condition. We have to keep |
| 684 | track of the tree of sequential "ands", so as to traverse back up it |
| 685 | if an "or" is met. */ |
| 686 | |
| 687 | else if (Ustrcmp(buffer, "and") == 0) |
| 688 | { |
| 689 | condition_block *andc = store_get(sizeof(condition_block)); |
| 690 | andc->parent = current_parent; |
| 691 | andc->type = cond_and; |
| 692 | andc->testfor = TRUE; |
| 693 | andc->left.c = c; |
| 694 | andc->right.u = NULL; /* insurance */ |
| 695 | *current = andc; |
| 696 | current = &(andc->right.c); |
| 697 | current_parent = andc; |
| 698 | } |
| 699 | |
| 700 | /* "Or" is similar, but has to be done a bit more carefully to |
| 701 | ensure that "and" is more binding. If there's a parent set, we |
| 702 | are following a sequence of "and"s and must track back to their |
| 703 | start. */ |
| 704 | |
| 705 | else if (Ustrcmp(buffer, "or") == 0) |
| 706 | { |
| 707 | condition_block *orc = store_get(sizeof(condition_block)); |
| 708 | condition_block *or_parent = NULL; |
| 709 | |
| 710 | if (current_parent != NULL) |
| 711 | { |
| 712 | while (current_parent->parent != NULL && |
| 713 | current_parent->parent->type == cond_and) |
| 714 | current_parent = current_parent->parent; |
| 715 | |
| 716 | /* If the parent has a parent, it must be an "or" parent. */ |
| 717 | |
| 718 | if (current_parent->parent != NULL) |
| 719 | or_parent = current_parent->parent; |
| 720 | } |
| 721 | |
| 722 | orc->parent = or_parent; |
| 723 | if (or_parent == NULL) *cond = orc; else |
| 724 | or_parent->right.c = orc; |
| 725 | orc->type = cond_or; |
| 726 | orc->testfor = TRUE; |
| 727 | orc->left.c = (current_parent == NULL)? c : current_parent; |
| 728 | orc->right.c = NULL; /* insurance */ |
| 729 | current = &(orc->right.c); |
| 730 | current_parent = orc; |
| 731 | } |
| 732 | |
| 733 | /* Otherwise there is a disaster */ |
| 734 | |
| 735 | else |
| 736 | { |
| 737 | *error_pointer = string_sprintf("\"and\" or \"or\" or \"%s\" " |
| 738 | "expected near line %d of filter file, but found \"%s\"", |
| 739 | toplevel? "then" : ")", line_number, buffer); |
| 740 | break; |
| 741 | } |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | return nextsigchar(ptr, TRUE); |
| 746 | } |
| 747 | |
| 748 | |
| 749 | |
| 750 | /************************************************* |
| 751 | * Ouput the current indent * |
| 752 | *************************************************/ |
| 753 | |
| 754 | static void |
| 755 | indent(void) |
| 756 | { |
| 757 | int i; |
| 758 | for (i = 0; i < output_indent; i++) debug_printf(" "); |
| 759 | } |
| 760 | |
| 761 | |
| 762 | |
| 763 | /************************************************* |
| 764 | * Condition printer: for debugging * |
| 765 | *************************************************/ |
| 766 | |
| 767 | /* |
| 768 | Arguments: |
| 769 | c the block at the top of the tree |
| 770 | toplevel TRUE at toplevel - stops overall brackets |
| 771 | |
| 772 | Returns: nothing |
| 773 | */ |
| 774 | |
| 775 | static void |
| 776 | print_condition(condition_block *c, BOOL toplevel) |
| 777 | { |
| 778 | const char *name = (c->testfor)? cond_names[c->type] : cond_not_names[c->type]; |
| 779 | switch(c->type) |
| 780 | { |
| 781 | case cond_personal: |
| 782 | case cond_delivered: |
| 783 | case cond_errormsg: |
| 784 | case cond_firsttime: |
| 785 | case cond_manualthaw: |
| 786 | debug_printf("%s", name); |
| 787 | break; |
| 788 | |
| 789 | case cond_is: |
| 790 | case cond_IS: |
| 791 | case cond_matches: |
| 792 | case cond_MATCHES: |
| 793 | case cond_contains: |
| 794 | case cond_CONTAINS: |
| 795 | case cond_begins: |
| 796 | case cond_BEGINS: |
| 797 | case cond_ends: |
| 798 | case cond_ENDS: |
| 799 | case cond_above: |
| 800 | case cond_below: |
| 801 | debug_printf("%s %s %s", c->left.u, name, c->right.u); |
| 802 | break; |
| 803 | |
| 804 | case cond_and: |
| 805 | if (!c->testfor) debug_printf("not ("); |
| 806 | print_condition(c->left.c, FALSE); |
| 807 | debug_printf(" %s ", cond_names[c->type]); |
| 808 | print_condition(c->right.c, FALSE); |
| 809 | if (!c->testfor) debug_printf(")"); |
| 810 | break; |
| 811 | |
| 812 | case cond_or: |
| 813 | if (!c->testfor) debug_printf("not ("); |
| 814 | else if (!toplevel) debug_printf("("); |
| 815 | print_condition(c->left.c, FALSE); |
| 816 | debug_printf(" %s ", cond_names[c->type]); |
| 817 | print_condition(c->right.c, FALSE); |
| 818 | if (!toplevel || !c->testfor) debug_printf(")"); |
| 819 | break; |
| 820 | |
| 821 | case cond_foranyaddress: |
| 822 | debug_printf("%s %s (", name, c->left.u); |
| 823 | print_condition(c->right.c, FALSE); |
| 824 | debug_printf(")"); |
| 825 | break; |
| 826 | } |
| 827 | } |
| 828 | |
| 829 | |
| 830 | |
| 831 | |
| 832 | /************************************************* |
| 833 | * Read one filtering command * |
| 834 | *************************************************/ |
| 835 | |
| 836 | /* |
| 837 | Arguments: |
| 838 | pptr points to pointer to first character of command; the pointer |
| 839 | is updated to point after the last character read |
| 840 | lastcmdptr points to pointer to pointer to last command; used for hanging |
| 841 | on the newly read command |
| 842 | |
| 843 | Returns: TRUE if command successfully read, else FALSE |
| 844 | */ |
| 845 | |
| 846 | static BOOL |
| 847 | read_command(uschar **pptr, filter_cmd ***lastcmdptr) |
| 848 | { |
| 849 | int command, i, cmd_bit; |
| 850 | filter_cmd *new, **newlastcmdptr; |
| 851 | BOOL yield = TRUE; |
| 852 | BOOL was_seen_or_unseen = FALSE; |
| 853 | BOOL was_noerror = FALSE; |
| 854 | uschar buffer[1024]; |
| 855 | uschar *ptr = *pptr; |
| 856 | uschar *saveptr; |
| 857 | uschar *fmsg = NULL; |
| 858 | |
| 859 | /* Read the next word and find which command it is. Command words are normally |
| 860 | terminated by white space, but there are two exceptions, which are the "if" and |
| 861 | "elif" commands. We must allow for them to be terminated by an opening bracket, |
| 862 | as brackets are allowed in conditions and users will expect not to require |
| 863 | white space here. */ |
| 864 | |
| 865 | if (Ustrncmp(ptr, "if(", 3) == 0) |
| 866 | { |
| 867 | Ustrcpy(buffer, "if"); |
| 868 | ptr += 2; |
| 869 | } |
| 870 | else if (Ustrncmp(ptr, "elif(", 5) == 0) |
| 871 | { |
| 872 | Ustrcpy(buffer, "elif"); |
| 873 | ptr += 4; |
| 874 | } |
| 875 | else |
| 876 | { |
| 877 | ptr = nextword(ptr, buffer, sizeof(buffer), FALSE); |
| 878 | if (*error_pointer != NULL) return FALSE; |
| 879 | } |
| 880 | |
| 881 | for (command = 0; command < command_list_count; command++) |
| 882 | if (Ustrcmp(buffer, command_list[command]) == 0) break; |
| 883 | |
| 884 | /* Handle the individual commands */ |
| 885 | |
| 886 | switch (command) |
| 887 | { |
| 888 | /* Add takes two arguments, separated by the word "to". Headers has two |
| 889 | arguments, but the first must be "add", "remove", or "charset", and it gets |
| 890 | stored in the second argument slot. Neither may be preceded by seen, unseen |
| 891 | or noerror. */ |
| 892 | |
| 893 | case add_command: |
| 894 | case headers_command: |
| 895 | if (seen_force || noerror_force) |
| 896 | { |
| 897 | *error_pointer = string_sprintf("\"seen\", \"unseen\", or \"noerror\" " |
| 898 | "found before an \"%s\" command near line %d", |
| 899 | command_list[command], line_number); |
| 900 | yield = FALSE; |
| 901 | } |
| 902 | /* Fall through */ |
| 903 | |
| 904 | /* Logwrite, logfile, pipe, and testprint all take a single argument, save |
| 905 | and logfile can have an option second argument for the mode, and deliver can |
| 906 | have "errors_to <address>" in a system filter, or in a user filter if the |
| 907 | address is the current one. */ |
| 908 | |
| 909 | case deliver_command: |
| 910 | case logfile_command: |
| 911 | case logwrite_command: |
| 912 | case pipe_command: |
| 913 | case save_command: |
| 914 | case testprint_command: |
| 915 | |
| 916 | ptr = nextitem(ptr, buffer, sizeof(buffer), FALSE); |
| 917 | if (*buffer == 0) |
| 918 | *error_pointer = string_sprintf("\"%s\" requires an argument " |
| 919 | "near line %d of filter file", command_list[command], line_number); |
| 920 | |
| 921 | if (*error_pointer != NULL) yield = FALSE; else |
| 922 | { |
| 923 | union argtypes argument, second_argument; |
| 924 | |
| 925 | argument.u = second_argument.u = NULL; |
| 926 | |
| 927 | if (command == add_command) |
| 928 | { |
| 929 | argument.u = string_copy(buffer); |
| 930 | ptr = nextitem(ptr, buffer, sizeof(buffer), FALSE); |
| 931 | if (*buffer == 0 || Ustrcmp(buffer, "to") != 0) |
| 932 | *error_pointer = string_sprintf("\"to\" expected in \"add\" command " |
| 933 | "near line %d of filter file", line_number); |
| 934 | else |
| 935 | { |
| 936 | ptr = nextitem(ptr, buffer, sizeof(buffer), FALSE); |
| 937 | if (*buffer == 0) |
| 938 | *error_pointer = string_sprintf("value missing after \"to\" " |
| 939 | "near line %d of filter file", line_number); |
| 940 | else second_argument.u = string_copy(buffer); |
| 941 | } |
| 942 | } |
| 943 | |
| 944 | else if (command == headers_command) |
| 945 | { |
| 946 | if (Ustrcmp(buffer, "add") == 0) |
| 947 | second_argument.b = TRUE; |
| 948 | else |
| 949 | if (Ustrcmp(buffer, "remove") == 0) second_argument.b = FALSE; |
| 950 | else |
| 951 | if (Ustrcmp(buffer, "charset") == 0) |
| 952 | second_argument.b = TRUE_UNSET; |
| 953 | else |
| 954 | { |
| 955 | *error_pointer = string_sprintf("\"add\", \"remove\", or \"charset\" " |
| 956 | "expected after \"headers\" near line %d of filter file", |
| 957 | line_number); |
| 958 | yield = FALSE; |
| 959 | } |
| 960 | |
| 961 | if (!system_filtering && second_argument.b != TRUE_UNSET) |
| 962 | { |
| 963 | *error_pointer = string_sprintf("header addition and removal is " |
| 964 | "available only in system filters: near line %d of filter file", |
| 965 | line_number); |
| 966 | yield = FALSE; |
| 967 | break; |
| 968 | } |
| 969 | |
| 970 | if (yield) |
| 971 | { |
| 972 | ptr = nextitem(ptr, buffer, sizeof(buffer), FALSE); |
| 973 | if (*buffer == 0) |
| 974 | *error_pointer = string_sprintf("value missing after \"add\", " |
| 975 | "\"remove\", or \"charset\" near line %d of filter file", |
| 976 | line_number); |
| 977 | else argument.u = string_copy(buffer); |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | /* The argument for the logwrite command must end in a newline, and the save |
| 982 | and logfile commands can have an optional mode argument. The deliver |
| 983 | command can have an optional "errors_to <address>" for a system filter, |
| 984 | or for a user filter if the address is the user's address. Accept the |
| 985 | syntax here - the check is later. */ |
| 986 | |
| 987 | else |
| 988 | { |
| 989 | if (command == logwrite_command) |
| 990 | { |
| 991 | int len = Ustrlen(buffer); |
| 992 | if (len == 0 || buffer[len-1] != '\n') Ustrcat(buffer, "\n"); |
| 993 | } |
| 994 | |
| 995 | argument.u = string_copy(buffer); |
| 996 | |
| 997 | if (command == save_command || command == logfile_command) |
| 998 | { |
| 999 | if (isdigit(*ptr)) |
| 1000 | { |
| 1001 | ptr = nextword(ptr, buffer, sizeof(buffer), FALSE); |
| 1002 | second_argument.i = (int)Ustrtol(buffer, NULL, 8); |
| 1003 | } |
| 1004 | else second_argument.i = -1; |
| 1005 | } |
| 1006 | |
| 1007 | else if (command == deliver_command) |
| 1008 | { |
| 1009 | uschar *save_ptr = ptr; |
| 1010 | ptr = nextword(ptr, buffer, sizeof(buffer), FALSE); |
| 1011 | if (Ustrcmp(buffer, "errors_to") == 0) |
| 1012 | { |
| 1013 | ptr = nextword(ptr, buffer, sizeof(buffer), FALSE); |
| 1014 | second_argument.u = string_copy(buffer); |
| 1015 | } |
| 1016 | else ptr = save_ptr; |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | /* Set up the command block. Seen defaults TRUE for delivery commands, |
| 1021 | FALSE for logging commands, and it doesn't matter for testprint, as |
| 1022 | that doesn't change the "delivered" status. */ |
| 1023 | |
| 1024 | if (*error_pointer != NULL) yield = FALSE; else |
| 1025 | { |
| 1026 | new = store_get(sizeof(filter_cmd) + sizeof(union argtypes)); |
| 1027 | new->next = NULL; |
| 1028 | **lastcmdptr = new; |
| 1029 | *lastcmdptr = &(new->next); |
| 1030 | new->command = command; |
| 1031 | new->seen = seen_force? seen_value : command_exparg_count[command] >= 128; |
| 1032 | new->noerror = noerror_force; |
| 1033 | new->args[0] = argument; |
| 1034 | new->args[1] = second_argument; |
| 1035 | } |
| 1036 | } |
| 1037 | break; |
| 1038 | |
| 1039 | |
| 1040 | /* Elif, else and endif just set a flag if expected. */ |
| 1041 | |
| 1042 | case elif_command: |
| 1043 | case else_command: |
| 1044 | case endif_command: |
| 1045 | if (seen_force || noerror_force) |
| 1046 | { |
| 1047 | *error_pointer = string_sprintf("\"seen\", \"unseen\", or \"noerror\" " |
| 1048 | "near line %d is not followed by a command", line_number); |
| 1049 | yield = FALSE; |
| 1050 | } |
| 1051 | |
| 1052 | if (expect_endif > 0) |
| 1053 | had_else_endif = (command == elif_command)? had_elif : |
| 1054 | (command == else_command)? had_else : had_endif; |
| 1055 | else |
| 1056 | { |
| 1057 | *error_pointer = string_sprintf("unexpected \"%s\" command near " |
| 1058 | "line %d of filter file", buffer, line_number); |
| 1059 | yield = FALSE; |
| 1060 | } |
| 1061 | break; |
| 1062 | |
| 1063 | |
| 1064 | /* Defer, freeze, and fail are available only if permitted. */ |
| 1065 | |
| 1066 | case defer_command: |
| 1067 | cmd_bit = RDO_DEFER; |
| 1068 | goto DEFER_FREEZE_FAIL; |
| 1069 | |
| 1070 | case fail_command: |
| 1071 | cmd_bit = RDO_FAIL; |
| 1072 | goto DEFER_FREEZE_FAIL; |
| 1073 | |
| 1074 | case freeze_command: |
| 1075 | cmd_bit = RDO_FREEZE; |
| 1076 | |
| 1077 | DEFER_FREEZE_FAIL: |
| 1078 | if ((filter_options & cmd_bit) == 0) |
| 1079 | { |
| 1080 | *error_pointer = string_sprintf("filtering command \"%s\" is disabled: " |
| 1081 | "near line %d of filter file", buffer, line_number); |
| 1082 | yield = FALSE; |
| 1083 | break; |
| 1084 | } |
| 1085 | |
| 1086 | /* A text message can be provided after the "text" keyword, or |
| 1087 | as a string in quotes. */ |
| 1088 | |
| 1089 | saveptr = ptr; |
| 1090 | ptr = nextitem(ptr, buffer, sizeof(buffer), FALSE); |
| 1091 | if (*saveptr != '\"' && (*buffer == 0 || Ustrcmp(buffer, "text") != 0)) |
| 1092 | { |
| 1093 | ptr = saveptr; |
| 1094 | fmsg = US""; |
| 1095 | } |
| 1096 | else |
| 1097 | { |
| 1098 | if (*saveptr != '\"') |
| 1099 | ptr = nextitem(ptr, buffer, sizeof(buffer), FALSE); |
| 1100 | fmsg = string_copy(buffer); |
| 1101 | } |
| 1102 | |
| 1103 | /* Drop through and treat as "finish", but never set "seen". */ |
| 1104 | |
| 1105 | seen_value = FALSE; |
| 1106 | |
| 1107 | /* Finish has no arguments; fmsg defaults to NULL */ |
| 1108 | |
| 1109 | case finish_command: |
| 1110 | new = store_get(sizeof(filter_cmd)); |
| 1111 | new->next = NULL; |
| 1112 | **lastcmdptr = new; |
| 1113 | *lastcmdptr = &(new->next); |
| 1114 | new->command = command; |
| 1115 | new->seen = seen_force? seen_value : FALSE; |
| 1116 | new->args[0].u = fmsg; |
| 1117 | break; |
| 1118 | |
| 1119 | |
| 1120 | /* Seen, unseen, and noerror are not allowed before if, which takes a |
| 1121 | condition argument and then and else sub-commands. */ |
| 1122 | |
| 1123 | case if_command: |
| 1124 | if (seen_force || noerror_force) |
| 1125 | { |
| 1126 | *error_pointer = string_sprintf("\"seen\", \"unseen\", or \"noerror\" " |
| 1127 | "found before an \"if\" command near line %d", |
| 1128 | line_number); |
| 1129 | yield = FALSE; |
| 1130 | } |
| 1131 | |
| 1132 | /* Set up the command block for if */ |
| 1133 | |
| 1134 | new = store_get(sizeof(filter_cmd) + 4 * sizeof(union argtypes)); |
| 1135 | new->next = NULL; |
| 1136 | **lastcmdptr = new; |
| 1137 | *lastcmdptr = &(new->next); |
| 1138 | new->command = command; |
| 1139 | new->seen = FALSE; |
| 1140 | new->args[0].u = NULL; |
| 1141 | new->args[1].u = new->args[2].u = NULL; |
| 1142 | new->args[3].u = ptr; |
| 1143 | |
| 1144 | /* Read the condition */ |
| 1145 | |
| 1146 | ptr = read_condition(ptr, &(new->args[0].c), TRUE); |
| 1147 | if (*error_pointer != NULL) { yield = FALSE; break; } |
| 1148 | |
| 1149 | /* Read the commands to be obeyed if the condition is true */ |
| 1150 | |
| 1151 | newlastcmdptr = &(new->args[1].f); |
| 1152 | if (!read_command_list(&ptr, &newlastcmdptr, TRUE)) yield = FALSE; |
| 1153 | |
| 1154 | /* If commands were successfully read, handle the various possible |
| 1155 | terminators. There may be a number of successive "elif" sections. */ |
| 1156 | |
| 1157 | else |
| 1158 | { |
| 1159 | while (had_else_endif == had_elif) |
| 1160 | { |
| 1161 | filter_cmd *newnew = |
| 1162 | store_get(sizeof(filter_cmd) + 4 * sizeof(union argtypes)); |
| 1163 | new->args[2].f = newnew; |
| 1164 | new = newnew; |
| 1165 | new->next = NULL; |
| 1166 | new->command = command; |
| 1167 | new->seen = FALSE; |
| 1168 | new->args[0].u = NULL; |
| 1169 | new->args[1].u = new->args[2].u = NULL; |
| 1170 | new->args[3].u = ptr; |
| 1171 | |
| 1172 | ptr = read_condition(ptr, &(new->args[0].c), TRUE); |
| 1173 | if (*error_pointer != NULL) { yield = FALSE; break; } |
| 1174 | newlastcmdptr = &(new->args[1].f); |
| 1175 | if (!read_command_list(&ptr, &newlastcmdptr, TRUE)) |
| 1176 | yield = FALSE; |
| 1177 | } |
| 1178 | |
| 1179 | if (yield == FALSE) break; |
| 1180 | |
| 1181 | /* Handle termination by "else", possibly following one or more |
| 1182 | "elsif" sections. */ |
| 1183 | |
| 1184 | if (had_else_endif == had_else) |
| 1185 | { |
| 1186 | newlastcmdptr = &(new->args[2].f); |
| 1187 | if (!read_command_list(&ptr, &newlastcmdptr, TRUE)) |
| 1188 | yield = FALSE; |
| 1189 | else if (had_else_endif != had_endif) |
| 1190 | { |
| 1191 | *error_pointer = string_sprintf("\"endif\" missing near line %d of " |
| 1192 | "filter file", line_number); |
| 1193 | yield = FALSE; |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | /* Otherwise the terminator was "endif" - this is checked by |
| 1198 | read_command_list(). The pointer is already set to NULL. */ |
| 1199 | } |
| 1200 | |
| 1201 | /* Reset the terminator flag. */ |
| 1202 | |
| 1203 | had_else_endif = had_neither; |
| 1204 | break; |
| 1205 | |
| 1206 | |
| 1207 | /* The mail & vacation commands have a whole slew of keyworded arguments. |
| 1208 | The final argument values are the file expand and return message booleans, |
| 1209 | whose offsets are defined in mailarg_index_{expand,return}. Although they |
| 1210 | are logically booleans, because they are stored in a uschar * value, we use |
| 1211 | NULL and not FALSE, to keep 64-bit compilers happy. */ |
| 1212 | |
| 1213 | case mail_command: |
| 1214 | case vacation_command: |
| 1215 | new = store_get(sizeof(filter_cmd) + mailargs_total * sizeof(union argtypes)); |
| 1216 | new->next = NULL; |
| 1217 | new->command = command; |
| 1218 | new->seen = seen_force? seen_value : FALSE; |
| 1219 | new->noerror = noerror_force; |
| 1220 | for (i = 0; i < mailargs_total; i++) new->args[i].u = NULL; |
| 1221 | |
| 1222 | /* Read keyword/value pairs until we hit one that isn't. The data |
| 1223 | must contain only printing chars plus tab, though the "text" value |
| 1224 | can also contain newlines. The "file" keyword can be preceded by the |
| 1225 | word "expand", and "return message" has no data. */ |
| 1226 | |
| 1227 | for (;;) |
| 1228 | { |
| 1229 | uschar *saveptr = ptr; |
| 1230 | ptr = nextword(ptr, buffer, sizeof(buffer), FALSE); |
| 1231 | if (*error_pointer != NULL) |
| 1232 | { |
| 1233 | yield = FALSE; |
| 1234 | break; |
| 1235 | } |
| 1236 | |
| 1237 | /* Ensure "return" is followed by "message"; that's a complete option */ |
| 1238 | |
| 1239 | if (Ustrcmp(buffer, "return") == 0) |
| 1240 | { |
| 1241 | new->args[mailarg_index_return].u = US""; /* not NULL => TRUE */ |
| 1242 | ptr = nextword(ptr, buffer, sizeof(buffer), FALSE); |
| 1243 | if (Ustrcmp(buffer, "message") != 0) |
| 1244 | { |
| 1245 | *error_pointer = string_sprintf("\"return\" not followed by \"message\" " |
| 1246 | " near line %d of filter file", line_number); |
| 1247 | yield = FALSE; |
| 1248 | break; |
| 1249 | } |
| 1250 | continue; |
| 1251 | } |
| 1252 | |
| 1253 | /* Ensure "expand" is followed by "file", then fall through to process the |
| 1254 | file keyword. */ |
| 1255 | |
| 1256 | if (Ustrcmp(buffer, "expand") == 0) |
| 1257 | { |
| 1258 | new->args[mailarg_index_expand].u = US""; /* not NULL => TRUE */ |
| 1259 | ptr = nextword(ptr, buffer, sizeof(buffer), FALSE); |
| 1260 | if (Ustrcmp(buffer, "file") != 0) |
| 1261 | { |
| 1262 | *error_pointer = string_sprintf("\"expand\" not followed by \"file\" " |
| 1263 | " near line %d of filter file", line_number); |
| 1264 | yield = FALSE; |
| 1265 | break; |
| 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | /* Scan for the keyword */ |
| 1270 | |
| 1271 | for (i = 0; i < MAILARGS_STRING_COUNT; i++) |
| 1272 | if (Ustrcmp(buffer, mailargs[i]) == 0) break; |
| 1273 | |
| 1274 | /* Not found keyword; assume end of this command */ |
| 1275 | |
| 1276 | if (i >= MAILARGS_STRING_COUNT) |
| 1277 | { |
| 1278 | ptr = saveptr; |
| 1279 | break; |
| 1280 | } |
| 1281 | |
| 1282 | /* Found keyword, read the data item */ |
| 1283 | |
| 1284 | ptr = nextitem(ptr, buffer, sizeof(buffer), FALSE); |
| 1285 | if (*error_pointer != NULL) |
| 1286 | { |
| 1287 | yield = FALSE; |
| 1288 | break; |
| 1289 | } |
| 1290 | else new->args[i].u = string_copy(buffer); |
| 1291 | } |
| 1292 | |
| 1293 | /* If this is the vacation command, apply some default settings to |
| 1294 | some of the arguments. */ |
| 1295 | |
| 1296 | if (command == vacation_command) |
| 1297 | { |
| 1298 | if (new->args[mailarg_index_file].u == NULL) |
| 1299 | { |
| 1300 | new->args[mailarg_index_file].u = string_copy(US".vacation.msg"); |
| 1301 | new->args[mailarg_index_expand].u = US""; /* not NULL => TRUE */ |
| 1302 | } |
| 1303 | if (new->args[mailarg_index_log].u == NULL) |
| 1304 | new->args[mailarg_index_log].u = string_copy(US".vacation.log"); |
| 1305 | if (new->args[mailarg_index_once].u == NULL) |
| 1306 | new->args[mailarg_index_once].u = string_copy(US".vacation"); |
| 1307 | if (new->args[mailarg_index_once_repeat].u == NULL) |
| 1308 | new->args[mailarg_index_once_repeat].u = string_copy(US"7d"); |
| 1309 | if (new->args[mailarg_index_subject].u == NULL) |
| 1310 | new->args[mailarg_index_subject].u = string_copy(US"On vacation"); |
| 1311 | } |
| 1312 | |
| 1313 | /* Join the address on to the chain of generated addresses */ |
| 1314 | |
| 1315 | **lastcmdptr = new; |
| 1316 | *lastcmdptr = &(new->next); |
| 1317 | break; |
| 1318 | |
| 1319 | |
| 1320 | /* Seen and unseen just set flags */ |
| 1321 | |
| 1322 | case seen_command: |
| 1323 | case unseen_command: |
| 1324 | if (*ptr == 0) |
| 1325 | { |
| 1326 | *error_pointer = string_sprintf("\"seen\" or \"unseen\" " |
| 1327 | "near line %d is not followed by a command", line_number); |
| 1328 | yield = FALSE; |
| 1329 | } |
| 1330 | if (seen_force) |
| 1331 | { |
| 1332 | *error_pointer = string_sprintf("\"seen\" or \"unseen\" repeated " |
| 1333 | "near line %d", line_number); |
| 1334 | yield = FALSE; |
| 1335 | } |
| 1336 | seen_value = (command == seen_command); |
| 1337 | seen_force = TRUE; |
| 1338 | was_seen_or_unseen = TRUE; |
| 1339 | break; |
| 1340 | |
| 1341 | |
| 1342 | /* So does noerror */ |
| 1343 | |
| 1344 | case noerror_command: |
| 1345 | if (*ptr == 0) |
| 1346 | { |
| 1347 | *error_pointer = string_sprintf("\"noerror\" " |
| 1348 | "near line %d is not followed by a command", line_number); |
| 1349 | yield = FALSE; |
| 1350 | } |
| 1351 | noerror_force = TRUE; |
| 1352 | was_noerror = TRUE; |
| 1353 | break; |
| 1354 | |
| 1355 | |
| 1356 | /* Oops */ |
| 1357 | |
| 1358 | default: |
| 1359 | *error_pointer = string_sprintf("unknown filtering command \"%s\" " |
| 1360 | "near line %d of filter file", buffer, line_number); |
| 1361 | yield = FALSE; |
| 1362 | break; |
| 1363 | } |
| 1364 | |
| 1365 | if (!was_seen_or_unseen && !was_noerror) |
| 1366 | { |
| 1367 | seen_force = FALSE; |
| 1368 | noerror_force = FALSE; |
| 1369 | } |
| 1370 | |
| 1371 | *pptr = ptr; |
| 1372 | return yield; |
| 1373 | } |
| 1374 | |
| 1375 | |
| 1376 | |
| 1377 | /************************************************* |
| 1378 | * Read a list of commands * |
| 1379 | *************************************************/ |
| 1380 | |
| 1381 | /* If condional is TRUE, the list must be terminated |
| 1382 | by the words "else" or "endif". |
| 1383 | |
| 1384 | Arguments: |
| 1385 | pptr points to pointer to next character; the pointer is updated |
| 1386 | lastcmdptr points to pointer to pointer to previously-read command; used |
| 1387 | for hanging on the new command |
| 1388 | conditional TRUE if this command is the subject of a condition |
| 1389 | |
| 1390 | Returns: TRUE on success |
| 1391 | */ |
| 1392 | |
| 1393 | static BOOL |
| 1394 | read_command_list(uschar **pptr, filter_cmd ***lastcmdptr, BOOL conditional) |
| 1395 | { |
| 1396 | if (conditional) expect_endif++; |
| 1397 | had_else_endif = had_neither; |
| 1398 | while (**pptr != 0 && had_else_endif == had_neither) |
| 1399 | { |
| 1400 | if (!read_command(pptr, lastcmdptr)) return FALSE; |
| 1401 | *pptr = nextsigchar(*pptr, TRUE); |
| 1402 | } |
| 1403 | if (conditional) |
| 1404 | { |
| 1405 | expect_endif--; |
| 1406 | if (had_else_endif == had_neither) |
| 1407 | { |
| 1408 | *error_pointer = US"\"endif\" missing at end of filter file"; |
| 1409 | return FALSE; |
| 1410 | } |
| 1411 | } |
| 1412 | return TRUE; |
| 1413 | } |
| 1414 | |
| 1415 | |
| 1416 | |
| 1417 | |
| 1418 | /************************************************* |
| 1419 | * Test a condition * |
| 1420 | *************************************************/ |
| 1421 | |
| 1422 | /* |
| 1423 | Arguments: |
| 1424 | c points to the condition block; c->testfor indicated whether |
| 1425 | it's a positive or negative condition |
| 1426 | toplevel TRUE if called from "if" directly; FALSE otherwise |
| 1427 | |
| 1428 | Returns: TRUE if the condition is met |
| 1429 | */ |
| 1430 | |
| 1431 | static BOOL |
| 1432 | test_condition(condition_block *c, BOOL toplevel) |
| 1433 | { |
| 1434 | BOOL yield = FALSE; |
| 1435 | const pcre *re; |
| 1436 | uschar *exp[2], *p, *pp; |
| 1437 | const uschar *regcomp_error = NULL; |
| 1438 | int regcomp_error_offset; |
| 1439 | int val[2]; |
| 1440 | int i; |
| 1441 | |
| 1442 | if (c == NULL) return TRUE; /* does this ever occur? */ |
| 1443 | |
| 1444 | switch (c->type) |
| 1445 | { |
| 1446 | case cond_and: |
| 1447 | yield = test_condition(c->left.c, FALSE) && |
| 1448 | *error_pointer == NULL && |
| 1449 | test_condition(c->right.c, FALSE); |
| 1450 | break; |
| 1451 | |
| 1452 | case cond_or: |
| 1453 | yield = test_condition(c->left.c, FALSE) || |
| 1454 | (*error_pointer == NULL && |
| 1455 | test_condition(c->right.c, FALSE)); |
| 1456 | break; |
| 1457 | |
| 1458 | /* The personal test is meaningless in a system filter. The tests are now in |
| 1459 | a separate function (so Sieve can use them). However, an Exim filter does not |
| 1460 | scan Cc: (hence the FALSE argument). */ |
| 1461 | |
| 1462 | case cond_personal: |
| 1463 | yield = system_filtering? FALSE : filter_personal(c->left.a, FALSE); |
| 1464 | break; |
| 1465 | |
| 1466 | case cond_delivered: |
| 1467 | yield = filter_delivered; |
| 1468 | break; |
| 1469 | |
| 1470 | /* Only TRUE if a message is actually being processed; FALSE for address |
| 1471 | testing and verification. */ |
| 1472 | |
| 1473 | case cond_errormsg: |
| 1474 | yield = message_id[0] != 0 && |
| 1475 | (sender_address == NULL || sender_address[0] == 0); |
| 1476 | break; |
| 1477 | |
| 1478 | /* Only FALSE if a message is actually being processed; TRUE for address |
| 1479 | and filter testing and verification. */ |
| 1480 | |
| 1481 | case cond_firsttime: |
| 1482 | yield = filter_test != FTEST_NONE || message_id[0] == 0 || deliver_firsttime; |
| 1483 | break; |
| 1484 | |
| 1485 | /* Only TRUE if a message is actually being processed; FALSE for address |
| 1486 | testing and verification. */ |
| 1487 | |
| 1488 | case cond_manualthaw: |
| 1489 | yield = message_id[0] != 0 && deliver_manual_thaw; |
| 1490 | break; |
| 1491 | |
| 1492 | /* The foranyaddress condition loops through a list of addresses */ |
| 1493 | |
| 1494 | case cond_foranyaddress: |
| 1495 | p = c->left.u; |
| 1496 | pp = expand_string(p); |
| 1497 | if (pp == NULL) |
| 1498 | { |
| 1499 | *error_pointer = string_sprintf("failed to expand \"%s\" in " |
| 1500 | "filter file: %s", p, expand_string_message); |
| 1501 | return FALSE; |
| 1502 | } |
| 1503 | |
| 1504 | yield = FALSE; |
| 1505 | parse_allow_group = TRUE; /* Allow group syntax */ |
| 1506 | |
| 1507 | while (*pp != 0) |
| 1508 | { |
| 1509 | uschar *error; |
| 1510 | int start, end, domain; |
| 1511 | int saveend; |
| 1512 | |
| 1513 | p = parse_find_address_end(pp, FALSE); |
| 1514 | saveend = *p; |
| 1515 | |
| 1516 | *p = 0; |
| 1517 | filter_thisaddress = |
| 1518 | parse_extract_address(pp, &error, &start, &end, &domain, FALSE); |
| 1519 | *p = saveend; |
| 1520 | |
| 1521 | if (filter_thisaddress != NULL) |
| 1522 | { |
| 1523 | if ((filter_test != FTEST_NONE && debug_selector != 0) || |
| 1524 | (debug_selector & D_filter) != 0) |
| 1525 | { |
| 1526 | indent(); |
| 1527 | debug_printf("Extracted address %s\n", filter_thisaddress); |
| 1528 | } |
| 1529 | yield = test_condition(c->right.c, FALSE); |
| 1530 | } |
| 1531 | |
| 1532 | if (yield) break; |
| 1533 | if (saveend == 0) break; |
| 1534 | pp = p + 1; |
| 1535 | } |
| 1536 | |
| 1537 | parse_allow_group = FALSE; /* Reset group syntax flags */ |
| 1538 | parse_found_group = FALSE; |
| 1539 | break; |
| 1540 | |
| 1541 | /* All other conditions have left and right values that need expanding; |
| 1542 | on error, it doesn't matter what value is returned. */ |
| 1543 | |
| 1544 | default: |
| 1545 | p = c->left.u; |
| 1546 | for (i = 0; i < 2; i++) |
| 1547 | { |
| 1548 | exp[i] = expand_string(p); |
| 1549 | if (exp[i] == NULL) |
| 1550 | { |
| 1551 | *error_pointer = string_sprintf("failed to expand \"%s\" in " |
| 1552 | "filter file: %s", p, expand_string_message); |
| 1553 | return FALSE; |
| 1554 | } |
| 1555 | p = c->right.u; |
| 1556 | } |
| 1557 | |
| 1558 | /* Inner switch for the different cases */ |
| 1559 | |
| 1560 | switch(c->type) |
| 1561 | { |
| 1562 | case cond_is: |
| 1563 | yield = strcmpic(exp[0], exp[1]) == 0; |
| 1564 | break; |
| 1565 | |
| 1566 | case cond_IS: |
| 1567 | yield = Ustrcmp(exp[0], exp[1]) == 0; |
| 1568 | break; |
| 1569 | |
| 1570 | case cond_contains: |
| 1571 | yield = strstric(exp[0], exp[1], FALSE) != NULL; |
| 1572 | break; |
| 1573 | |
| 1574 | case cond_CONTAINS: |
| 1575 | yield = Ustrstr(exp[0], exp[1]) != NULL; |
| 1576 | break; |
| 1577 | |
| 1578 | case cond_begins: |
| 1579 | yield = strncmpic(exp[0], exp[1], Ustrlen(exp[1])) == 0; |
| 1580 | break; |
| 1581 | |
| 1582 | case cond_BEGINS: |
| 1583 | yield = Ustrncmp(exp[0], exp[1], Ustrlen(exp[1])) == 0; |
| 1584 | break; |
| 1585 | |
| 1586 | case cond_ends: |
| 1587 | case cond_ENDS: |
| 1588 | { |
| 1589 | int len = Ustrlen(exp[1]); |
| 1590 | uschar *s = exp[0] + Ustrlen(exp[0]) - len; |
| 1591 | yield = (s < exp[0])? FALSE : |
| 1592 | ((c->type == cond_ends)? strcmpic(s, exp[1]) : Ustrcmp(s, exp[1])) == 0; |
| 1593 | } |
| 1594 | break; |
| 1595 | |
| 1596 | case cond_matches: |
| 1597 | case cond_MATCHES: |
| 1598 | if ((filter_test != FTEST_NONE && debug_selector != 0) || |
| 1599 | (debug_selector & D_filter) != 0) |
| 1600 | { |
| 1601 | debug_printf("Match expanded arguments:\n"); |
| 1602 | debug_printf(" Subject = %s\n", exp[0]); |
| 1603 | debug_printf(" Pattern = %s\n", exp[1]); |
| 1604 | } |
| 1605 | |
| 1606 | re = pcre_compile(CS exp[1], |
| 1607 | PCRE_COPT | ((c->type == cond_matches)? PCRE_CASELESS : 0), |
| 1608 | (const char **)®comp_error, ®comp_error_offset, NULL); |
| 1609 | |
| 1610 | if (re == NULL) |
| 1611 | { |
| 1612 | *error_pointer = string_sprintf("error while compiling " |
| 1613 | "regular expression \"%s\": %s at offset %d", |
| 1614 | exp[1], regcomp_error, regcomp_error_offset); |
| 1615 | return FALSE; |
| 1616 | } |
| 1617 | |
| 1618 | yield = regex_match_and_setup(re, exp[0], PCRE_EOPT, -1); |
| 1619 | break; |
| 1620 | |
| 1621 | /* For above and below, convert the strings to numbers */ |
| 1622 | |
| 1623 | case cond_above: |
| 1624 | case cond_below: |
| 1625 | for (i = 0; i < 2; i++) |
| 1626 | { |
| 1627 | val[i] = get_number(exp[i], &yield); |
| 1628 | if (!yield) |
| 1629 | { |
| 1630 | *error_pointer = string_sprintf("malformed numerical string \"%s\"", |
| 1631 | exp[i]); |
| 1632 | return FALSE; |
| 1633 | } |
| 1634 | } |
| 1635 | yield = (c->type == cond_above)? (val[0] > val[1]) : (val[0] < val[1]); |
| 1636 | break; |
| 1637 | } |
| 1638 | break; |
| 1639 | } |
| 1640 | |
| 1641 | if ((filter_test != FTEST_NONE && debug_selector != 0) || |
| 1642 | (debug_selector & D_filter) != 0) |
| 1643 | { |
| 1644 | indent(); |
| 1645 | debug_printf("%sondition is %s: ", |
| 1646 | toplevel? "C" : "Sub-c", |
| 1647 | (yield == c->testfor)? "true" : "false"); |
| 1648 | print_condition(c, TRUE); |
| 1649 | debug_printf("\n"); |
| 1650 | } |
| 1651 | |
| 1652 | return yield == c->testfor; |
| 1653 | } |
| 1654 | |
| 1655 | |
| 1656 | |
| 1657 | /************************************************* |
| 1658 | * Interpret chain of commands * |
| 1659 | *************************************************/ |
| 1660 | |
| 1661 | /* In testing state, just say what would be done rather than doing it. The |
| 1662 | testprint command just expands and outputs its argument in testing state, and |
| 1663 | does nothing otherwise. |
| 1664 | |
| 1665 | Arguments: |
| 1666 | commands points to chain of commands to interpret |
| 1667 | generated where to hang newly-generated addresses |
| 1668 | |
| 1669 | Returns: FF_DELIVERED success, a significant action was taken |
| 1670 | FF_NOTDELIVERED success, no significant action |
| 1671 | FF_DEFER defer requested |
| 1672 | FF_FAIL fail requested |
| 1673 | FF_FREEZE freeze requested |
| 1674 | FF_ERROR there was a problem |
| 1675 | */ |
| 1676 | |
| 1677 | static int |
| 1678 | interpret_commands(filter_cmd *commands, address_item **generated) |
| 1679 | { |
| 1680 | uschar *s; |
| 1681 | int mode; |
| 1682 | address_item *addr; |
| 1683 | BOOL condition_value; |
| 1684 | |
| 1685 | while (commands != NULL) |
| 1686 | { |
| 1687 | int ff_ret; |
| 1688 | uschar *fmsg, *ff_name; |
| 1689 | uschar *expargs[MAILARGS_STRING_COUNT]; |
| 1690 | |
| 1691 | int i, n[2]; |
| 1692 | |
| 1693 | /* Expand the relevant number of arguments for the command that are |
| 1694 | not NULL. */ |
| 1695 | |
| 1696 | for (i = 0; i < (command_exparg_count[commands->command] & 15); i++) |
| 1697 | { |
| 1698 | uschar *ss = commands->args[i].u; |
| 1699 | if (ss == NULL) |
| 1700 | { |
| 1701 | expargs[i] = NULL; |
| 1702 | } |
| 1703 | else |
| 1704 | { |
| 1705 | expargs[i] = expand_string(ss); |
| 1706 | if (expargs[i] == NULL) |
| 1707 | { |
| 1708 | *error_pointer = string_sprintf("failed to expand \"%s\" in " |
| 1709 | "%s command: %s", ss, command_list[commands->command], |
| 1710 | expand_string_message); |
| 1711 | return FF_ERROR; |
| 1712 | } |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | /* Now switch for each command, setting the "delivered" flag if any of them |
| 1717 | have "seen" set. */ |
| 1718 | |
| 1719 | if (commands->seen) filter_delivered = TRUE; |
| 1720 | |
| 1721 | switch(commands->command) |
| 1722 | { |
| 1723 | case add_command: |
| 1724 | for (i = 0; i < 2; i++) |
| 1725 | { |
| 1726 | uschar *ss = expargs[i]; |
| 1727 | uschar *end; |
| 1728 | |
| 1729 | if (i == 1 && (*ss++ != 'n' || ss[1] != 0)) |
| 1730 | { |
| 1731 | *error_pointer = string_sprintf("unknown variable \"%s\" in \"add\" " |
| 1732 | "command", expargs[i]); |
| 1733 | return FF_ERROR; |
| 1734 | } |
| 1735 | |
| 1736 | /* Allow for "--" at the start of the value (from -$n0) for example */ |
| 1737 | if (i == 0) while (ss[0] == '-' && ss[1] == '-') ss += 2; |
| 1738 | |
| 1739 | n[i] = (int)Ustrtol(ss, &end, 0); |
| 1740 | if (*end != 0) |
| 1741 | { |
| 1742 | *error_pointer = string_sprintf("malformed number \"%s\" in \"add\" " |
| 1743 | "command", ss); |
| 1744 | return FF_ERROR; |
| 1745 | } |
| 1746 | } |
| 1747 | |
| 1748 | filter_n[n[1]] += n[0]; |
| 1749 | if (filter_test != FTEST_NONE) printf("Add %d to n%d\n", n[0], n[1]); |
| 1750 | break; |
| 1751 | |
| 1752 | /* A deliver command's argument must be a valid address. Its optional |
| 1753 | second argument (system filter only) must also be a valid address. */ |
| 1754 | |
| 1755 | case deliver_command: |
| 1756 | for (i = 0; i < 2; i++) |
| 1757 | { |
| 1758 | s = expargs[i]; |
| 1759 | if (s != NULL) |
| 1760 | { |
| 1761 | int start, end, domain; |
| 1762 | uschar *error; |
| 1763 | uschar *ss = parse_extract_address(s, &error, &start, &end, &domain, |
| 1764 | FALSE); |
| 1765 | if (ss != NULL) |
| 1766 | expargs[i] = ((filter_options & RDO_REWRITE) != 0)? |
| 1767 | rewrite_address(ss, TRUE, FALSE, global_rewrite_rules, |
| 1768 | rewrite_existflags) : |
| 1769 | rewrite_address_qualify(ss, TRUE); |
| 1770 | else |
| 1771 | { |
| 1772 | *error_pointer = string_sprintf("malformed address \"%s\" in " |
| 1773 | "filter file: %s", s, error); |
| 1774 | return FF_ERROR; |
| 1775 | } |
| 1776 | } |
| 1777 | } |
| 1778 | |
| 1779 | /* Stick the errors address into a simple variable, as it will |
| 1780 | be referenced a few times. Check that the caller is permitted to |
| 1781 | specify it. */ |
| 1782 | |
| 1783 | s = expargs[1]; |
| 1784 | |
| 1785 | if (s != NULL && !system_filtering) |
| 1786 | { |
| 1787 | uschar *ownaddress = expand_string(US"$local_part@$domain"); |
| 1788 | if (strcmpic(ownaddress, s) != 0) |
| 1789 | { |
| 1790 | *error_pointer = US"errors_to must point to the caller's address"; |
| 1791 | return FF_ERROR; |
| 1792 | } |
| 1793 | } |
| 1794 | |
| 1795 | /* Test case: report what would happen */ |
| 1796 | |
| 1797 | if (filter_test != FTEST_NONE) |
| 1798 | { |
| 1799 | indent(); |
| 1800 | printf("%seliver message to: %s%s%s%s\n", |
| 1801 | (commands->seen)? "D" : "Unseen d", |
| 1802 | expargs[0], |
| 1803 | commands->noerror? " (noerror)" : "", |
| 1804 | (s != NULL)? " errors_to " : "", |
| 1805 | (s != NULL)? s : US""); |
| 1806 | } |
| 1807 | |
| 1808 | /* Real case. */ |
| 1809 | |
| 1810 | else |
| 1811 | { |
| 1812 | DEBUG(D_filter) debug_printf("Filter: %sdeliver message to: %s%s%s%s\n", |
| 1813 | (commands->seen)? "" : "unseen ", |
| 1814 | expargs[0], |
| 1815 | commands->noerror? " (noerror)" : "", |
| 1816 | (s != NULL)? " errors_to " : "", |
| 1817 | (s != NULL)? s : US""); |
| 1818 | |
| 1819 | /* Create the new address and add it to the chain, setting the |
| 1820 | af_ignore_error flag if necessary, and the errors address, which can be |
| 1821 | set in a system filter and to the local address in user filters. */ |
| 1822 | |
| 1823 | addr = deliver_make_addr(expargs[0], TRUE); /* TRUE => copy s */ |
| 1824 | addr->p.errors_address = (s == NULL)? |
| 1825 | s : string_copy(s); /* Default is NULL */ |
| 1826 | if (commands->noerror) setflag(addr, af_ignore_error); |
| 1827 | addr->next = *generated; |
| 1828 | *generated = addr; |
| 1829 | } |
| 1830 | break; |
| 1831 | |
| 1832 | case save_command: |
| 1833 | s = expargs[0]; |
| 1834 | mode = commands->args[1].i; |
| 1835 | |
| 1836 | /* Test case: report what would happen */ |
| 1837 | |
| 1838 | if (filter_test != FTEST_NONE) |
| 1839 | { |
| 1840 | indent(); |
| 1841 | if (mode < 0) |
| 1842 | printf("%save message to: %s%s\n", (commands->seen)? |
| 1843 | "S" : "Unseen s", s, commands->noerror? " (noerror)" : ""); |
| 1844 | else |
| 1845 | printf("%save message to: %s %04o%s\n", (commands->seen)? |
| 1846 | "S" : "Unseen s", s, mode, commands->noerror? " (noerror)" : ""); |
| 1847 | } |
| 1848 | |
| 1849 | /* Real case: Ensure save argument starts with / if there is a home |
| 1850 | directory to prepend. */ |
| 1851 | |
| 1852 | else |
| 1853 | { |
| 1854 | if (s[0] != '/' && (filter_options & RDO_PREPEND_HOME) != 0 && |
| 1855 | deliver_home != NULL && deliver_home[0] != 0) |
| 1856 | s = string_sprintf("%s/%s", deliver_home, s); |
| 1857 | DEBUG(D_filter) debug_printf("Filter: %ssave message to: %s%s\n", |
| 1858 | (commands->seen)? "" : "unseen ", s, |
| 1859 | commands->noerror? " (noerror)" : ""); |
| 1860 | |
| 1861 | /* Create the new address and add it to the chain, setting the |
| 1862 | af_pfr and af_file flags, the af_ignore_error flag if necessary, and the |
| 1863 | mode value. */ |
| 1864 | |
| 1865 | addr = deliver_make_addr(s, TRUE); /* TRUE => copy s */ |
| 1866 | setflag(addr, af_pfr|af_file); |
| 1867 | if (commands->noerror) setflag(addr, af_ignore_error); |
| 1868 | addr->mode = mode; |
| 1869 | addr->next = *generated; |
| 1870 | *generated = addr; |
| 1871 | } |
| 1872 | break; |
| 1873 | |
| 1874 | case pipe_command: |
| 1875 | s = string_copy(commands->args[0].u); |
| 1876 | if (filter_test != FTEST_NONE) |
| 1877 | { |
| 1878 | indent(); |
| 1879 | printf("%sipe message to: %s%s\n", (commands->seen)? |
| 1880 | "P" : "Unseen p", s, commands->noerror? " (noerror)" : ""); |
| 1881 | } |
| 1882 | else /* Ensure pipe command starts with | */ |
| 1883 | { |
| 1884 | DEBUG(D_filter) debug_printf("Filter: %spipe message to: %s%s\n", |
| 1885 | (commands->seen)? "" : "unseen ", s, |
| 1886 | commands->noerror? " (noerror)" : ""); |
| 1887 | if (s[0] != '|') s = string_sprintf("|%s", s); |
| 1888 | |
| 1889 | /* Create the new address and add it to the chain, setting the |
| 1890 | af_ignore_error flag if necessary. Set the af_expand_pipe flag so that |
| 1891 | each command argument is expanded in the transport after the command |
| 1892 | has been split up into separate arguments. */ |
| 1893 | |
| 1894 | addr = deliver_make_addr(s, TRUE); /* TRUE => copy s */ |
| 1895 | setflag(addr, af_pfr|af_expand_pipe); |
| 1896 | if (commands->noerror) setflag(addr, af_ignore_error); |
| 1897 | addr->next = *generated; |
| 1898 | *generated = addr; |
| 1899 | |
| 1900 | /* If there are any numeric variables in existence (e.g. after a regex |
| 1901 | condition), or if $thisaddress is set, take a copy for use in the |
| 1902 | expansion. Note that we can't pass NULL for filter_thisaddress, because |
| 1903 | NULL terminates the list. */ |
| 1904 | |
| 1905 | if (expand_nmax >= 0 || filter_thisaddress != NULL) |
| 1906 | { |
| 1907 | int i; |
| 1908 | int ecount = (expand_nmax >= 0)? expand_nmax : -1; |
| 1909 | uschar **ss = store_get(sizeof(uschar *) * (ecount + 3)); |
| 1910 | addr->pipe_expandn = ss; |
| 1911 | if (filter_thisaddress == NULL) filter_thisaddress = US""; |
| 1912 | *ss++ = string_copy(filter_thisaddress); |
| 1913 | for (i = 0; i <= expand_nmax; i++) |
| 1914 | *ss++ = string_copyn(expand_nstring[i], expand_nlength[i]); |
| 1915 | *ss = NULL; |
| 1916 | } |
| 1917 | } |
| 1918 | break; |
| 1919 | |
| 1920 | /* Set up the file name and mode, and close any previously open |
| 1921 | file. */ |
| 1922 | |
| 1923 | case logfile_command: |
| 1924 | log_mode = commands->args[1].i; |
| 1925 | if (log_mode == -1) log_mode = 0600; |
| 1926 | if (log_fd >= 0) |
| 1927 | { |
| 1928 | (void)close(log_fd); |
| 1929 | log_fd = -1; |
| 1930 | } |
| 1931 | log_filename = expargs[0]; |
| 1932 | if (filter_test != FTEST_NONE) |
| 1933 | { |
| 1934 | indent(); |
| 1935 | printf("%sogfile %s\n", (commands->seen)? "Seen l" : "L", log_filename); |
| 1936 | } |
| 1937 | break; |
| 1938 | |
| 1939 | case logwrite_command: |
| 1940 | s = expargs[0]; |
| 1941 | |
| 1942 | if (filter_test != FTEST_NONE) |
| 1943 | { |
| 1944 | indent(); |
| 1945 | printf("%sogwrite \"%s\"\n", (commands->seen)? "Seen l" : "L", |
| 1946 | string_printing(s)); |
| 1947 | } |
| 1948 | |
| 1949 | /* Attempt to write to a log file only if configured as permissible. |
| 1950 | Logging may be forcibly skipped for verifying or testing. */ |
| 1951 | |
| 1952 | else if ((filter_options & RDO_LOG) != 0) /* Locked out */ |
| 1953 | { |
| 1954 | DEBUG(D_filter) |
| 1955 | debug_printf("filter log command aborted: euid=%ld\n", |
| 1956 | (long int)geteuid()); |
| 1957 | *error_pointer = US"logwrite command forbidden"; |
| 1958 | return FF_ERROR; |
| 1959 | } |
| 1960 | else if ((filter_options & RDO_REALLOG) != 0) |
| 1961 | { |
| 1962 | int len; |
| 1963 | DEBUG(D_filter) debug_printf("writing filter log as euid %ld\n", |
| 1964 | (long int)geteuid()); |
| 1965 | if (log_fd < 0) |
| 1966 | { |
| 1967 | if (log_filename == NULL) |
| 1968 | { |
| 1969 | *error_pointer = US"attempt to obey \"logwrite\" command " |
| 1970 | "without a previous \"logfile\""; |
| 1971 | return FF_ERROR; |
| 1972 | } |
| 1973 | log_fd = Uopen(log_filename, O_CREAT|O_APPEND|O_WRONLY, log_mode); |
| 1974 | if (log_fd < 0) |
| 1975 | { |
| 1976 | *error_pointer = string_open_failed(errno, "filter log file \"%s\"", |
| 1977 | log_filename); |
| 1978 | return FF_ERROR; |
| 1979 | } |
| 1980 | } |
| 1981 | len = Ustrlen(s); |
| 1982 | if (write(log_fd, s, len) != len) |
| 1983 | { |
| 1984 | *error_pointer = string_sprintf("write error on file \"%s\": %s", |
| 1985 | log_filename, strerror(errno)); |
| 1986 | return FF_ERROR; |
| 1987 | } |
| 1988 | } |
| 1989 | else |
| 1990 | { |
| 1991 | DEBUG(D_filter) debug_printf("skipping logwrite (verifying or testing)\n"); |
| 1992 | } |
| 1993 | break; |
| 1994 | |
| 1995 | /* Header addition and removal is available only in the system filter. The |
| 1996 | command is rejected at parse time otherwise. However "headers charset" is |
| 1997 | always permitted. */ |
| 1998 | |
| 1999 | case headers_command: |
| 2000 | { |
| 2001 | int subtype = commands->args[1].i; |
| 2002 | s = expargs[0]; |
| 2003 | |
| 2004 | if (filter_test != FTEST_NONE) |
| 2005 | printf("Headers %s \"%s\"\n", (subtype == TRUE)? "add" : |
| 2006 | (subtype == FALSE)? "remove" : "charset", string_printing(s)); |
| 2007 | |
| 2008 | if (subtype == TRUE) |
| 2009 | { |
| 2010 | while (isspace(*s)) s++; |
| 2011 | if (s[0] != 0) |
| 2012 | { |
| 2013 | header_add(htype_other, "%s%s", s, (s[Ustrlen(s)-1] == '\n')? |
| 2014 | "" : "\n"); |
| 2015 | header_last->type = header_checkname(header_last, FALSE); |
| 2016 | if (header_last->type >= 'a') header_last->type = htype_other; |
| 2017 | } |
| 2018 | } |
| 2019 | |
| 2020 | else if (subtype == FALSE) |
| 2021 | { |
| 2022 | int sep = 0; |
| 2023 | uschar *ss; |
| 2024 | uschar *list = s; |
| 2025 | uschar buffer[128]; |
| 2026 | while ((ss = string_nextinlist(&list, &sep, buffer, sizeof(buffer))) |
| 2027 | != NULL) |
| 2028 | header_remove(0, ss); |
| 2029 | } |
| 2030 | |
| 2031 | /* This setting lasts only while the filter is running; on exit, the |
| 2032 | variable is reset to the previous value. */ |
| 2033 | |
| 2034 | else headers_charset = s; |
| 2035 | } |
| 2036 | break; |
| 2037 | |
| 2038 | /* Defer, freeze, and fail are available only when explicitly permitted. |
| 2039 | These commands are rejected at parse time otherwise. The message can get |
| 2040 | very long by the inclusion of message headers; truncate if it is, and also |
| 2041 | ensure printing characters so as not to mess up log files. */ |
| 2042 | |
| 2043 | case defer_command: |
| 2044 | ff_name = US"defer"; |
| 2045 | ff_ret = FF_DEFER; |
| 2046 | goto DEFERFREEZEFAIL; |
| 2047 | |
| 2048 | case fail_command: |
| 2049 | ff_name = US"fail"; |
| 2050 | ff_ret = FF_FAIL; |
| 2051 | goto DEFERFREEZEFAIL; |
| 2052 | |
| 2053 | case freeze_command: |
| 2054 | ff_name = US"freeze"; |
| 2055 | ff_ret = FF_FREEZE; |
| 2056 | |
| 2057 | DEFERFREEZEFAIL: |
| 2058 | fmsg = expargs[0]; |
| 2059 | if (Ustrlen(fmsg) > 1024) Ustrcpy(fmsg + 1000, " ... (truncated)"); |
| 2060 | fmsg = string_printing(fmsg); |
| 2061 | *error_pointer = fmsg; |
| 2062 | |
| 2063 | if (filter_test != FTEST_NONE) |
| 2064 | { |
| 2065 | indent(); |
| 2066 | printf("%c%s text \"%s\"\n", toupper(ff_name[0]), ff_name+1, fmsg); |
| 2067 | } |
| 2068 | else DEBUG(D_filter) debug_printf("Filter: %s \"%s\"\n", ff_name, fmsg); |
| 2069 | return ff_ret; |
| 2070 | |
| 2071 | case finish_command: |
| 2072 | if (filter_test != FTEST_NONE) |
| 2073 | { |
| 2074 | indent(); |
| 2075 | printf("%sinish\n", (commands->seen)? "Seen f" : "F"); |
| 2076 | } |
| 2077 | else |
| 2078 | { |
| 2079 | DEBUG(D_filter) debug_printf("Filter: %sfinish\n", |
| 2080 | (commands->seen)? " Seen " : ""); |
| 2081 | } |
| 2082 | finish_obeyed = TRUE; |
| 2083 | return filter_delivered? FF_DELIVERED : FF_NOTDELIVERED; |
| 2084 | |
| 2085 | case if_command: |
| 2086 | { |
| 2087 | uschar *save_address = filter_thisaddress; |
| 2088 | int ok = FF_DELIVERED; |
| 2089 | condition_value = test_condition(commands->args[0].c, TRUE); |
| 2090 | if (*error_pointer != NULL) ok = FF_ERROR; else |
| 2091 | { |
| 2092 | output_indent += 2; |
| 2093 | ok = interpret_commands(commands->args[condition_value? 1:2].f, |
| 2094 | generated); |
| 2095 | output_indent -= 2; |
| 2096 | } |
| 2097 | filter_thisaddress = save_address; |
| 2098 | if (finish_obeyed || (ok != FF_DELIVERED && ok != FF_NOTDELIVERED)) |
| 2099 | return ok; |
| 2100 | } |
| 2101 | break; |
| 2102 | |
| 2103 | |
| 2104 | /* To try to catch runaway loops, do not generate mail if the |
| 2105 | return path is unset or if a non-trusted user supplied -f <> |
| 2106 | as the return path. */ |
| 2107 | |
| 2108 | case mail_command: |
| 2109 | case vacation_command: |
| 2110 | if (return_path == NULL || return_path[0] == 0) |
| 2111 | { |
| 2112 | if (filter_test != FTEST_NONE) |
| 2113 | printf("%s command ignored because return_path is empty\n", |
| 2114 | command_list[commands->command]); |
| 2115 | else DEBUG(D_filter) debug_printf("%s command ignored because return_path " |
| 2116 | "is empty\n", command_list[commands->command]); |
| 2117 | break; |
| 2118 | } |
| 2119 | |
| 2120 | /* Check the contents of the strings. The type of string can be deduced |
| 2121 | from the value of i. |
| 2122 | |
| 2123 | . If i is equal to mailarg_index_text it's a text string for the body, |
| 2124 | where anything goes. |
| 2125 | |
| 2126 | . If i is > mailarg_index_text, we are dealing with a file name, which |
| 2127 | cannot contain non-printing characters. |
| 2128 | |
| 2129 | . If i is less than mailarg_index_headers we are dealing with something |
| 2130 | that will go in a single message header line, where newlines must be |
| 2131 | followed by white space. |
| 2132 | |
| 2133 | . If i is equal to mailarg_index_headers, we have a string that contains |
| 2134 | one or more headers. Newlines that are not followed by white space must |
| 2135 | be followed by a header name. |
| 2136 | */ |
| 2137 | |
| 2138 | for (i = 0; i < MAILARGS_STRING_COUNT; i++) |
| 2139 | { |
| 2140 | uschar *p; |
| 2141 | uschar *s = expargs[i]; |
| 2142 | |
| 2143 | if (s == NULL) continue; |
| 2144 | |
| 2145 | if (i != mailarg_index_text) for (p = s; *p != 0; p++) |
| 2146 | { |
| 2147 | int c = *p; |
| 2148 | if (i > mailarg_index_text) |
| 2149 | { |
| 2150 | if (!mac_isprint(c)) |
| 2151 | { |
| 2152 | *error_pointer = string_sprintf("non-printing character in \"%s\" " |
| 2153 | "in %s command", string_printing(s), |
| 2154 | command_list[commands->command]); |
| 2155 | return FF_ERROR; |
| 2156 | } |
| 2157 | } |
| 2158 | |
| 2159 | /* i < mailarg_index_text */ |
| 2160 | |
| 2161 | else if (c == '\n' && !isspace(p[1])) |
| 2162 | { |
| 2163 | if (i < mailarg_index_headers) |
| 2164 | { |
| 2165 | *error_pointer = string_sprintf("\\n not followed by space in " |
| 2166 | "\"%.1024s\" in %s command", string_printing(s), |
| 2167 | command_list[commands->command]); |
| 2168 | return FF_ERROR; |
| 2169 | } |
| 2170 | |
| 2171 | /* Check for the start of a new header line within the string */ |
| 2172 | |
| 2173 | else |
| 2174 | { |
| 2175 | uschar *pp; |
| 2176 | for (pp = p + 1;; pp++) |
| 2177 | { |
| 2178 | c = *pp; |
| 2179 | if (c == ':' && pp != p + 1) break; |
| 2180 | if (c == 0 || c == ':' || isspace(*pp)) |
| 2181 | { |
| 2182 | *error_pointer = string_sprintf("\\n not followed by space or " |
| 2183 | "valid header name in \"%.1024s\" in %s command", |
| 2184 | string_printing(s), command_list[commands->command]); |
| 2185 | return FF_ERROR; |
| 2186 | } |
| 2187 | } |
| 2188 | p = pp; |
| 2189 | } |
| 2190 | } |
| 2191 | } /* Loop to scan the string */ |
| 2192 | |
| 2193 | /* The string is OK */ |
| 2194 | |
| 2195 | commands->args[i].u = s; |
| 2196 | } |
| 2197 | |
| 2198 | /* Proceed with mail or vacation command */ |
| 2199 | |
| 2200 | if (filter_test != FTEST_NONE) |
| 2201 | { |
| 2202 | uschar *to = commands->args[mailarg_index_to].u; |
| 2203 | indent(); |
| 2204 | printf("%sail to: %s%s%s\n", (commands->seen)? "Seen m" : "M", |
| 2205 | (to == NULL)? US"<default>" : to, |
| 2206 | (commands->command == vacation_command)? " (vacation)" : "", |
| 2207 | (commands->noerror)? " (noerror)" : ""); |
| 2208 | for (i = 1; i < MAILARGS_STRING_COUNT; i++) |
| 2209 | { |
| 2210 | uschar *arg = commands->args[i].u; |
| 2211 | if (arg != NULL) |
| 2212 | { |
| 2213 | int len = Ustrlen(mailargs[i]); |
| 2214 | int indent = (debug_selector != 0)? output_indent : 0; |
| 2215 | while (len++ < 7 + indent) printf(" "); |
| 2216 | printf("%s: %s%s\n", mailargs[i], string_printing(arg), |
| 2217 | (commands->args[mailarg_index_expand].u != NULL && |
| 2218 | Ustrcmp(mailargs[i], "file") == 0)? " (expanded)" : ""); |
| 2219 | } |
| 2220 | } |
| 2221 | if (commands->args[mailarg_index_return].u != NULL) |
| 2222 | printf("Return original message\n"); |
| 2223 | } |
| 2224 | else |
| 2225 | { |
| 2226 | uschar *tt; |
| 2227 | uschar *log_addr = NULL; |
| 2228 | uschar *to = commands->args[mailarg_index_to].u; |
| 2229 | int size = 0; |
| 2230 | int ptr = 0; |
| 2231 | int badflag = 0; |
| 2232 | |
| 2233 | if (to == NULL) to = expand_string(US"$reply_address"); |
| 2234 | while (isspace(*to)) to++; |
| 2235 | |
| 2236 | for (tt = to; *tt != 0; tt++) /* Get rid of newlines */ |
| 2237 | if (*tt == '\n') *tt = ' '; |
| 2238 | |
| 2239 | DEBUG(D_filter) |
| 2240 | { |
| 2241 | debug_printf("Filter: %smail to: %s%s%s\n", |
| 2242 | (commands->seen)? "seen " : "", |
| 2243 | to, |
| 2244 | (commands->command == vacation_command)? " (vacation)" : "", |
| 2245 | (commands->noerror)? " (noerror)" : ""); |
| 2246 | for (i = 1; i < MAILARGS_STRING_COUNT; i++) |
| 2247 | { |
| 2248 | uschar *arg = commands->args[i].u; |
| 2249 | if (arg != NULL) |
| 2250 | { |
| 2251 | int len = Ustrlen(mailargs[i]); |
| 2252 | while (len++ < 15) debug_printf(" "); |
| 2253 | debug_printf("%s: %s%s\n", mailargs[i], string_printing(arg), |
| 2254 | (commands->args[mailarg_index_expand].u != NULL && |
| 2255 | Ustrcmp(mailargs[i], "file") == 0)? " (expanded)" : ""); |
| 2256 | } |
| 2257 | } |
| 2258 | } |
| 2259 | |
| 2260 | /* Create the "address" for the autoreply. This is used only for logging, |
| 2261 | as the actual recipients are extracted from the To: line by -t. We use the |
| 2262 | same logic here to extract the working addresses (there may be more than |
| 2263 | one). Just in case there are a vast number of addresses, stop when the |
| 2264 | string gets too long. */ |
| 2265 | |
| 2266 | tt = to; |
| 2267 | while (*tt != 0) |
| 2268 | { |
| 2269 | uschar *ss = parse_find_address_end(tt, FALSE); |
| 2270 | uschar *recipient, *errmess; |
| 2271 | int start, end, domain; |
| 2272 | int temp = *ss; |
| 2273 | |
| 2274 | *ss = 0; |
| 2275 | recipient = parse_extract_address(tt, &errmess, &start, &end, &domain, |
| 2276 | FALSE); |
| 2277 | *ss = temp; |
| 2278 | |
| 2279 | /* Ignore empty addresses and errors; an error will occur later if |
| 2280 | there's something really bad. */ |
| 2281 | |
| 2282 | if (recipient != NULL) |
| 2283 | { |
| 2284 | log_addr = string_cat(log_addr, &size, &ptr, |
| 2285 | (log_addr == NULL)? US">" : US",", 1); |
| 2286 | log_addr = string_cat(log_addr, &size, &ptr, recipient, |
| 2287 | Ustrlen(recipient)); |
| 2288 | } |
| 2289 | |
| 2290 | /* Check size */ |
| 2291 | |
| 2292 | if (ptr > 256) |
| 2293 | { |
| 2294 | log_addr = string_cat(log_addr, &size, &ptr, US", ...", 5); |
| 2295 | break; |
| 2296 | } |
| 2297 | |
| 2298 | /* Move on past this address */ |
| 2299 | |
| 2300 | tt = ss + (*ss? 1:0); |
| 2301 | while (isspace(*tt)) tt++; |
| 2302 | } |
| 2303 | |
| 2304 | if (log_addr == NULL) |
| 2305 | { |
| 2306 | log_addr = string_sprintf(">**bad-reply**"); |
| 2307 | badflag = af_bad_reply; |
| 2308 | } |
| 2309 | else log_addr[ptr] = 0; |
| 2310 | |
| 2311 | addr = deliver_make_addr(log_addr, FALSE); |
| 2312 | setflag(addr, (af_pfr|badflag)); |
| 2313 | if (commands->noerror) setflag(addr, af_ignore_error); |
| 2314 | addr->next = *generated; |
| 2315 | *generated = addr; |
| 2316 | addr->reply = store_get(sizeof(reply_item)); |
| 2317 | addr->reply->from = NULL; |
| 2318 | addr->reply->to = string_copy(to); |
| 2319 | addr->reply->file_expand = |
| 2320 | commands->args[mailarg_index_expand].u != NULL; |
| 2321 | addr->reply->expand_forbid = expand_forbid; |
| 2322 | addr->reply->return_message = |
| 2323 | commands->args[mailarg_index_return].u != NULL; |
| 2324 | addr->reply->once_repeat = 0; |
| 2325 | |
| 2326 | if (commands->args[mailarg_index_once_repeat].u != NULL) |
| 2327 | { |
| 2328 | addr->reply->once_repeat = |
| 2329 | readconf_readtime(commands->args[mailarg_index_once_repeat].u, 0, |
| 2330 | FALSE); |
| 2331 | if (addr->reply->once_repeat < 0) |
| 2332 | { |
| 2333 | *error_pointer = string_sprintf("Bad time value for \"once_repeat\" " |
| 2334 | "in mail or vacation command: %s", |
| 2335 | commands->args[mailarg_index_once_repeat]); |
| 2336 | return FF_ERROR; |
| 2337 | } |
| 2338 | } |
| 2339 | |
| 2340 | /* Set up all the remaining string arguments (those other than "to") */ |
| 2341 | |
| 2342 | for (i = 1; i < mailargs_string_passed; i++) |
| 2343 | { |
| 2344 | uschar *ss = commands->args[i].u; |
| 2345 | *((uschar **)(((uschar *)(addr->reply)) + reply_offsets[i])) = |
| 2346 | (ss == NULL)? NULL : string_copy(ss); |
| 2347 | } |
| 2348 | } |
| 2349 | break; |
| 2350 | |
| 2351 | case testprint_command: |
| 2352 | if (filter_test != FTEST_NONE || (debug_selector & D_filter) != 0) |
| 2353 | { |
| 2354 | uschar *s = string_printing(expargs[0]); |
| 2355 | if (filter_test == FTEST_NONE) |
| 2356 | debug_printf("Filter: testprint: %s\n", s); |
| 2357 | else |
| 2358 | printf("Testprint: %s\n", s); |
| 2359 | } |
| 2360 | } |
| 2361 | |
| 2362 | commands = commands->next; |
| 2363 | } |
| 2364 | |
| 2365 | return filter_delivered? FF_DELIVERED : FF_NOTDELIVERED; |
| 2366 | } |
| 2367 | |
| 2368 | |
| 2369 | |
| 2370 | /************************************************* |
| 2371 | * Test for a personal message * |
| 2372 | *************************************************/ |
| 2373 | |
| 2374 | /* This function is global so that it can also be called from the code that |
| 2375 | implements Sieve filters. |
| 2376 | |
| 2377 | Arguments: |
| 2378 | aliases a chain of aliases |
| 2379 | scan_cc TRUE if Cc: and Bcc: are to be scanned (Exim filters do not) |
| 2380 | |
| 2381 | Returns: TRUE if the message is deemed to be personal |
| 2382 | */ |
| 2383 | |
| 2384 | BOOL |
| 2385 | filter_personal(string_item *aliases, BOOL scan_cc) |
| 2386 | { |
| 2387 | uschar *self, *self_from, *self_to; |
| 2388 | uschar *psself = NULL, *psself_from = NULL, *psself_to = NULL; |
| 2389 | void *reset_point = store_get(0); |
| 2390 | BOOL yield; |
| 2391 | header_line *h; |
| 2392 | int to_count = 2; |
| 2393 | int from_count = 9; |
| 2394 | |
| 2395 | /* If any header line in the message is a defined "List-" header field, it is |
| 2396 | not a personal message. We used to check for any header line that started with |
| 2397 | "List-", but this was tightened up for release 4.54. The check is now for |
| 2398 | "List-Id", defined in RFC 2929, or "List-Help", "List-Subscribe", "List- |
| 2399 | Unsubscribe", "List-Post", "List-Owner" or "List-Archive", all of which are |
| 2400 | defined in RFC 2369. We also scan for "Auto-Submitted"; if it is found to |
| 2401 | contain any value other than "no", the message is not personal (RFC 3834). |
| 2402 | Previously the test was for "auto-". */ |
| 2403 | |
| 2404 | for (h = header_list; h != NULL; h = h->next) |
| 2405 | { |
| 2406 | uschar *s; |
| 2407 | if (h->type == htype_old) continue; |
| 2408 | |
| 2409 | if (strncmpic(h->text, US"List-", 5) == 0) |
| 2410 | { |
| 2411 | s = h->text + 5; |
| 2412 | if (strncmpic(s, US"Id:", 3) == 0 || |
| 2413 | strncmpic(s, US"Help:", 5) == 0 || |
| 2414 | strncmpic(s, US"Subscribe:", 10) == 0 || |
| 2415 | strncmpic(s, US"Unsubscribe:", 12) == 0 || |
| 2416 | strncmpic(s, US"Post:", 5) == 0 || |
| 2417 | strncmpic(s, US"Owner:", 6) == 0 || |
| 2418 | strncmpic(s, US"Archive:", 8) == 0) |
| 2419 | return FALSE; |
| 2420 | } |
| 2421 | |
| 2422 | else if (strncmpic(h->text, US"Auto-submitted:", 15) == 0) |
| 2423 | { |
| 2424 | s = h->text + 15; |
| 2425 | while (isspace(*s)) s++; |
| 2426 | if (strncmpic(s, US"no", 2) != 0) return FALSE; |
| 2427 | s += 2; |
| 2428 | while (isspace(*s)) s++; |
| 2429 | if (*s != 0) return FALSE; |
| 2430 | } |
| 2431 | } |
| 2432 | |
| 2433 | /* Set up "my" address */ |
| 2434 | |
| 2435 | self = string_sprintf("%s@%s", deliver_localpart, deliver_domain); |
| 2436 | self_from = rewrite_one(self, rewrite_from, NULL, FALSE, US"", |
| 2437 | global_rewrite_rules); |
| 2438 | self_to = rewrite_one(self, rewrite_to, NULL, FALSE, US"", |
| 2439 | global_rewrite_rules); |
| 2440 | |
| 2441 | |
| 2442 | if (self_from == NULL) self_from = self; |
| 2443 | if (self_to == NULL) self_to = self; |
| 2444 | |
| 2445 | /* If there's a prefix or suffix set, we must include the prefixed/ |
| 2446 | suffixed version of the local part in the tests. */ |
| 2447 | |
| 2448 | if (deliver_localpart_prefix != NULL || deliver_localpart_suffix != NULL) |
| 2449 | { |
| 2450 | psself = string_sprintf("%s%s%s@%s", |
| 2451 | (deliver_localpart_prefix == NULL)? US"" : deliver_localpart_prefix, |
| 2452 | deliver_localpart, |
| 2453 | (deliver_localpart_suffix == NULL)? US"" : deliver_localpart_suffix, |
| 2454 | deliver_domain); |
| 2455 | psself_from = rewrite_one(psself, rewrite_from, NULL, FALSE, US"", |
| 2456 | global_rewrite_rules); |
| 2457 | psself_to = rewrite_one(psself, rewrite_to, NULL, FALSE, US"", |
| 2458 | global_rewrite_rules); |
| 2459 | if (psself_from == NULL) psself_from = psself; |
| 2460 | if (psself_to == NULL) psself_to = psself; |
| 2461 | to_count += 2; |
| 2462 | from_count += 2; |
| 2463 | } |
| 2464 | |
| 2465 | /* Do all the necessary tests; the counts are adjusted for {pre,suf}fix */ |
| 2466 | |
| 2467 | yield = |
| 2468 | ( |
| 2469 | header_match(US"to:", TRUE, TRUE, aliases, to_count, self, self_to, psself, |
| 2470 | psself_to) || |
| 2471 | (scan_cc && |
| 2472 | ( |
| 2473 | header_match(US"cc:", TRUE, TRUE, aliases, to_count, self, self_to, |
| 2474 | psself, psself_to) |
| 2475 | || |
| 2476 | header_match(US"bcc:", TRUE, TRUE, aliases, to_count, self, self_to, |
| 2477 | psself, psself_to) |
| 2478 | ) |
| 2479 | ) |
| 2480 | ) && |
| 2481 | |
| 2482 | header_match(US"from:", TRUE, FALSE, aliases, from_count, "^server@", |
| 2483 | "^daemon@", "^root@", "^listserv@", "^majordomo@", "^.*?-request@", |
| 2484 | "^owner-[^@]+@", self, self_from, psself, psself_from) && |
| 2485 | |
| 2486 | header_match(US"precedence:", FALSE, FALSE, NULL, 3, "bulk","list","junk") && |
| 2487 | |
| 2488 | (sender_address == NULL || sender_address[0] != 0); |
| 2489 | |
| 2490 | store_reset(reset_point); |
| 2491 | return yield; |
| 2492 | } |
| 2493 | |
| 2494 | |
| 2495 | |
| 2496 | /************************************************* |
| 2497 | * Interpret a mail filter file * |
| 2498 | *************************************************/ |
| 2499 | |
| 2500 | /* |
| 2501 | Arguments: |
| 2502 | filter points to the entire file, read into store as a single string |
| 2503 | options controls whether various special things are allowed, and requests |
| 2504 | special actions |
| 2505 | generated where to hang newly-generated addresses |
| 2506 | error where to pass back an error text |
| 2507 | |
| 2508 | Returns: FF_DELIVERED success, a significant action was taken |
| 2509 | FF_NOTDELIVERED success, no significant action |
| 2510 | FF_DEFER defer requested |
| 2511 | FF_FAIL fail requested |
| 2512 | FF_FREEZE freeze requested |
| 2513 | FF_ERROR there was a problem |
| 2514 | */ |
| 2515 | |
| 2516 | int |
| 2517 | filter_interpret(uschar *filter, int options, address_item **generated, |
| 2518 | uschar **error) |
| 2519 | { |
| 2520 | int i; |
| 2521 | int yield = FF_ERROR; |
| 2522 | uschar *ptr = filter; |
| 2523 | uschar *save_headers_charset = headers_charset; |
| 2524 | filter_cmd *commands = NULL; |
| 2525 | filter_cmd **lastcmdptr = &commands; |
| 2526 | |
| 2527 | DEBUG(D_route) debug_printf("Filter: start of processing\n"); |
| 2528 | |
| 2529 | /* Initialize "not in an if command", set the global flag that is always TRUE |
| 2530 | while filtering, and zero the variables. */ |
| 2531 | |
| 2532 | expect_endif = 0; |
| 2533 | output_indent = 0; |
| 2534 | filter_running = TRUE; |
| 2535 | for (i = 0; i < FILTER_VARIABLE_COUNT; i++) filter_n[i] = 0; |
| 2536 | |
| 2537 | /* To save having to pass certain values about all the time, make them static. |
| 2538 | Also initialize the line number, for error messages, and the log file |
| 2539 | variables. */ |
| 2540 | |
| 2541 | filter_options = options; |
| 2542 | filter_delivered = FALSE; |
| 2543 | finish_obeyed = FALSE; |
| 2544 | error_pointer = error; |
| 2545 | *error_pointer = NULL; |
| 2546 | line_number = 1; |
| 2547 | log_fd = -1; |
| 2548 | log_mode = 0600; |
| 2549 | log_filename = NULL; |
| 2550 | |
| 2551 | /* Scan filter file for syntax and build up an interpretation thereof, and |
| 2552 | interpret the compiled commands, and if testing, say whether we ended up |
| 2553 | delivered or not, unless something went wrong. */ |
| 2554 | |
| 2555 | seen_force = FALSE; |
| 2556 | ptr = nextsigchar(ptr, TRUE); |
| 2557 | |
| 2558 | if (read_command_list(&ptr, &lastcmdptr, FALSE)) |
| 2559 | yield = interpret_commands(commands, generated); |
| 2560 | |
| 2561 | if (filter_test != FTEST_NONE || (debug_selector & D_filter) != 0) |
| 2562 | { |
| 2563 | uschar *s = US""; |
| 2564 | switch(yield) |
| 2565 | { |
| 2566 | case FF_DEFER: |
| 2567 | s = US"Filtering ended by \"defer\"."; |
| 2568 | break; |
| 2569 | |
| 2570 | case FF_FREEZE: |
| 2571 | s = US"Filtering ended by \"freeze\"."; |
| 2572 | break; |
| 2573 | |
| 2574 | case FF_FAIL: |
| 2575 | s = US"Filtering ended by \"fail\"."; |
| 2576 | break; |
| 2577 | |
| 2578 | case FF_DELIVERED: |
| 2579 | s = US"Filtering set up at least one significant delivery " |
| 2580 | "or other action.\n" |
| 2581 | "No other deliveries will occur."; |
| 2582 | break; |
| 2583 | |
| 2584 | case FF_NOTDELIVERED: |
| 2585 | s = US"Filtering did not set up a significant delivery.\n" |
| 2586 | "Normal delivery will occur."; |
| 2587 | break; |
| 2588 | |
| 2589 | case FF_ERROR: |
| 2590 | s = string_sprintf("Filter error: %s", *error); |
| 2591 | break; |
| 2592 | } |
| 2593 | |
| 2594 | if (filter_test != FTEST_NONE) printf("%s\n", CS s); |
| 2595 | else debug_printf("%s\n", s); |
| 2596 | } |
| 2597 | |
| 2598 | /* Close the log file if it was opened, and kill off any numerical variables |
| 2599 | before returning. Reset the header decoding charset. */ |
| 2600 | |
| 2601 | if (log_fd >= 0) (void)close(log_fd); |
| 2602 | expand_nmax = -1; |
| 2603 | filter_running = FALSE; |
| 2604 | headers_charset = save_headers_charset; |
| 2605 | |
| 2606 | DEBUG(D_route) debug_printf("Filter: end of processing\n"); |
| 2607 | return yield; |
| 2608 | } |
| 2609 | |
| 2610 | |
| 2611 | /* End of filter.c */ |