Mercurial > dnsbl
annotate src/context.cpp @ 188:edcefdb7ccc1
fix null pointer dereference from missing HELO command
| author | carl |
|---|---|
| date | Sat, 10 Nov 2007 10:27:05 -0800 |
| parents | 7a722f482bfb |
| children | 8f4a9a37d4d9 |
| rev | line source |
|---|---|
| 94 | 1 /* |
| 2 | |
| 152 | 3 Copyright (c) 2007 Carl Byington - 510 Software Group, released under |
| 4 the GPL version 3 or any later version at your choice available at | |
| 5 http://www.gnu.org/licenses/gpl-3.0.txt | |
| 94 | 6 |
| 7 */ | |
| 8 | |
| 9 #include "includes.h" | |
| 10 | |
| 160 | 11 #include <arpa/inet.h> |
| 94 | 12 #include <net/if.h> |
| 160 | 13 #include <netdb.h> |
| 94 | 14 #include <netinet/in.h> |
| 15 #include <netinet/tcp.h> | |
| 160 | 16 #include <sys/ioctl.h> |
| 94 | 17 #include <sys/socket.h> |
| 160 | 18 #include <sys/stat.h> |
| 94 | 19 #include <sys/un.h> |
| 160 | 20 #include <unistd.h> |
| 94 | 21 |
| 22 static char* context_version="$Id$"; | |
| 23 | |
| 153 | 24 char *token_autowhite; |
| 94 | 25 char *token_black; |
| 178 | 26 char *token_cctld; |
| 94 | 27 char *token_content; |
| 28 char *token_context; | |
| 178 | 29 char *token_dccbulk; |
| 94 | 30 char *token_dccfrom; |
| 178 | 31 char *token_dccgrey; |
| 94 | 32 char *token_dccto; |
| 33 char *token_default; | |
| 34 char *token_dnsbl; | |
| 35 char *token_dnsbll; | |
| 36 char *token_envfrom; | |
| 37 char *token_envto; | |
| 38 char *token_filter; | |
| 168 | 39 char *token_generic; |
| 94 | 40 char *token_host_limit; |
| 41 char *token_html_limit; | |
| 42 char *token_html_tags; | |
| 43 char *token_ignore; | |
| 44 char *token_include; | |
| 45 char *token_inherit; | |
| 46 char *token_lbrace; | |
| 47 char *token_mailhost; | |
| 48 char *token_many; | |
| 178 | 49 char *token_no; |
| 94 | 50 char *token_off; |
| 178 | 51 char *token_ok; |
| 94 | 52 char *token_ok2; |
| 53 char *token_on; | |
| 136 | 54 char *token_rate; |
| 94 | 55 char *token_rbrace; |
| 178 | 56 char *token_require; |
| 94 | 57 char *token_semi; |
| 58 char *token_soft; | |
| 163 | 59 char *token_spamassassin; |
| 94 | 60 char *token_substitute; |
| 61 char *token_tld; | |
| 62 char *token_unknown; | |
| 119 | 63 char *token_uribl; |
| 94 | 64 char *token_verify; |
| 65 char *token_white; | |
| 178 | 66 char *token_yes; |
| 94 | 67 |
| 68 char *token_myhostname; | |
|
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69 #ifndef HOST_NAME_MAX |
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70 #define HOST_NAME_MAX 255 |
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71 #endif |
| 94 | 72 char myhostname[HOST_NAME_MAX+1]; |
| 73 | |
| 153 | 74 pthread_mutex_t verifier_mutex; // protect the verifier map |
| 94 | 75 verify_map verifiers; |
| 153 | 76 |
|
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77 pthread_mutex_t whitelister_mutex; // protect the whitelisters map |
| 153 | 78 whitelister_map whitelisters; |
| 79 | |
| 94 | 80 string_set all_strings; // owns all the strings, only modified by the config loader thread |
| 81 const int maxlen = 1000; // used for snprintf buffers | |
| 178 | 82 const int maxsmtp_age = 60;// smtp verify sockets older than this are ancient |
| 153 | 83 const int maxauto_age = 600;// auto whitelister delay before flushing to file |
| 94 | 84 extern int NULL_SOCKET; |
|
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85 const time_t ERROR_SMTP_SOCKET_TIME = 600; // number of seconds between attempts to open a socket to an smtp server |
| 94 | 86 |
| 87 | |
| 88 int SMTP::writer() { | |
| 89 #ifdef VERIFY_DEBUG | |
| 90 log("writer() sees buffer with %s", buffer); | |
| 91 log("writer() sees error %d", (int)error); | |
| 92 #endif | |
| 93 int rs = 0; | |
| 94 if (!error) { | |
| 95 int len = strlen(buffer); | |
| 96 while (rs < len) { | |
| 97 int ws = write(fd, buffer+rs, len-rs); | |
| 98 if (ws > 0) { | |
| 99 rs += ws; | |
| 100 } | |
| 101 else { | |
| 102 // peer closed the socket! | |
| 103 rs = 0; | |
| 104 error = true; | |
| 105 break; | |
| 106 } | |
| 107 } | |
| 108 } | |
| 109 return rs; | |
| 110 } | |
| 111 | |
| 112 | |
| 113 int SMTP::reader() { | |
| 114 // read some bytes terminated by lf or end of buffer. | |
| 115 // we may have a multi line response or part thereof in the buffer. | |
| 116 #ifdef VERIFY_DEBUG | |
| 117 log("reader() sees error %d", (int)error); | |
| 118 #endif | |
| 119 if (error) return 0; | |
| 120 int len = maxlen-1; // room for null terminator | |
| 121 while (pending < len) { | |
| 122 int ws = read(fd, buffer+pending, len-pending); | |
| 123 if (ws > 0) { | |
| 124 pending += ws; | |
| 125 if (buffer[pending-1] == '\n') break; | |
| 126 } | |
| 127 else { | |
| 128 // peer closed the socket! | |
| 129 pending = 0; | |
| 130 error = true; | |
| 131 break; | |
| 132 } | |
| 133 } | |
| 134 buffer[pending] = '\0'; | |
| 135 #ifdef VERIFY_DEBUG | |
| 136 log("reader() sees buffer with %s", buffer); | |
| 137 #endif | |
| 138 return pending; | |
| 139 } | |
| 140 | |
| 141 | |
| 142 int SMTP::read_line() { | |
| 143 char *lf = strchr(buffer, '\n'); | |
| 144 if (!lf) { | |
| 145 reader(); // get a lf | |
| 146 lf = strchr(buffer, '\n'); | |
| 147 if (!lf) lf = buffer + pending - 1; | |
| 148 } | |
| 149 return (lf-buffer)+1; // number of bytes in this line | |
| 150 } | |
| 151 | |
| 152 | |
| 97 | 153 void SMTP::flush_line(int r) { |
| 94 | 154 if (pending > r) memmove(buffer, buffer+r, pending-r); |
| 155 pending -= r; | |
| 156 } | |
| 157 | |
| 158 | |
| 159 int SMTP::read_response() { | |
| 160 pending = 0; | |
| 161 buffer[pending] = '\0'; | |
| 162 while (true) { | |
| 163 int r = read_line(); | |
| 164 #ifdef VERIFY_DEBUG | |
| 165 log("read_response() sees line with %s", buffer); | |
| 166 log("read_response() sees line length %d", r); | |
| 167 #endif | |
| 168 if (r == 0) return 0; // failed to read any bytes | |
| 169 if ((r > 4) && (buffer[3] == '-')) { | |
| 170 flush_line(r); | |
| 171 continue; | |
| 172 } | |
| 173 return atoi(buffer); | |
| 174 } | |
| 175 return 0; | |
| 176 } | |
| 177 | |
| 178 | |
| 179 int SMTP::cmd(char *c) { | |
| 180 if (c) { | |
| 181 init(); | |
| 182 append(c); | |
| 183 } | |
| 184 append("\r\n"); | |
| 185 writer(); | |
| 186 return read_response(); | |
| 187 } | |
| 188 | |
| 189 | |
| 190 int SMTP::helo() { | |
| 191 if (read_response() != 220) return 0; | |
| 192 init(); | |
| 193 append("HELO "); | |
| 194 append(token_myhostname); | |
| 195 return cmd(NULL); | |
| 196 } | |
| 197 | |
| 198 | |
| 199 int SMTP::rset() { | |
| 200 int rc = cmd("RSET"); | |
| 201 efrom[0] = '\0'; | |
| 202 return rc; | |
| 203 } | |
| 204 | |
| 205 | |
| 206 int SMTP::from(char *f) { | |
| 101 | 207 // the mail from address was originally passed in from sendmail enclosed in |
| 208 // <>. to_lower_string() removed the <> and converted the rest to lowercase, | |
| 209 // except in the case of an empty return path, which was left as the two | |
| 210 // character string <>. | |
| 94 | 211 if (strncmp(efrom, f, maxlen)) { |
| 212 rset(); | |
| 213 strncpy(efrom, f, maxlen); | |
| 214 init(); | |
| 215 append("MAIL FROM:<"); | |
| 101 | 216 if (*f != '<') append(f); |
| 94 | 217 append(">"); |
| 218 return cmd(NULL); | |
| 219 } | |
| 220 return 250; // pretend it worked | |
| 221 } | |
| 222 | |
| 223 | |
| 224 int SMTP::rcpt(char *t) { | |
| 225 init(); | |
| 226 append("RCPT TO:<"); | |
| 227 append(t); | |
| 228 append(">"); | |
| 229 return cmd(NULL); | |
| 230 } | |
| 231 | |
| 232 | |
| 233 int SMTP::quit() { | |
| 234 return cmd("QUIT"); | |
| 235 } | |
| 236 | |
| 237 | |
| 238 void SMTP::closefd() { | |
| 239 shutdown(fd, SHUT_RDWR); | |
| 240 close(fd); | |
| 241 } | |
| 242 | |
| 243 | |
| 244 #ifdef VERIFY_DEBUG | |
| 245 void SMTP::log(char *m, int v) { | |
| 246 char buf[maxlen]; | |
| 247 snprintf(buf, maxlen, m, v); | |
| 248 my_syslog(buf); | |
| 249 } | |
| 250 | |
| 251 | |
| 252 void SMTP::log(char *m, char *v) { | |
| 253 char buf[maxlen]; | |
| 254 snprintf(buf, maxlen, m, v); | |
| 255 my_syslog(buf); | |
| 256 } | |
| 257 #endif | |
| 258 | |
| 259 | |
| 153 | 260 //////////////////////////////////////////////// |
| 261 // smtp verifier so backup mx machines can see the valid users | |
| 262 // | |
| 94 | 263 VERIFY::VERIFY(char *h) { |
| 264 host = h; | |
| 265 last_err = 0; | |
| 266 pthread_mutex_init(&mutex, 0); | |
| 267 } | |
| 268 | |
| 269 | |
| 270 void VERIFY::closer() { | |
| 271 bool ok = true; | |
| 272 while (ok) { | |
| 273 SMTP *conn = NULL; | |
| 274 pthread_mutex_lock(&mutex); | |
| 275 if (connections.empty()) { | |
| 276 ok = false; | |
| 277 } | |
| 278 else { | |
| 279 conn = connections.front(); | |
| 280 time_t now = time(NULL); | |
| 153 | 281 if ((now - conn->get_stamp()) > maxsmtp_age) { |
| 94 | 282 // this connection is ancient, remove it |
| 283 connections.pop_front(); | |
| 284 } | |
| 285 else { | |
| 286 ok = false; | |
| 287 conn = NULL; | |
| 288 } | |
| 289 } | |
| 290 pthread_mutex_unlock(&mutex); | |
| 291 // avoid doing this work inside the mutex lock | |
| 292 if (conn) { | |
| 293 #ifdef VERIFY_DEBUG | |
| 294 conn->log("closer() closes ancient %d", conn->get_fd()); | |
| 295 #endif | |
| 296 delete conn; | |
| 297 } | |
| 298 } | |
| 299 } | |
| 300 | |
| 301 | |
| 302 SMTP* VERIFY::get_connection() { | |
| 303 SMTP *conn = NULL; | |
| 304 pthread_mutex_lock(&mutex); | |
| 305 if (!connections.empty()) { | |
| 306 conn = connections.front(); | |
| 307 connections.pop_front(); | |
| 308 #ifdef VERIFY_DEBUG | |
| 309 conn->log("get_connection() %d from cache", conn->get_fd()); | |
| 310 #endif | |
| 311 } | |
| 312 pthread_mutex_unlock(&mutex); | |
| 313 if (conn) return conn; | |
| 314 int sock = NULL_SOCKET; | |
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315 if ((time(NULL) - last_err) > ERROR_SMTP_SOCKET_TIME) { |
| 94 | 316 // nothing recent, maybe this time it will work |
| 317 hostent *h = gethostbyname(host); | |
| 318 if (h) { | |
| 319 sockaddr_in server; | |
| 320 server.sin_family = h->h_addrtype; | |
| 321 server.sin_port = htons(25); | |
| 322 memcpy(&server.sin_addr, h->h_addr_list[0], h->h_length); | |
| 323 sock = socket(PF_INET, SOCK_STREAM, 0); | |
| 324 if (sock != NULL_SOCKET) { | |
| 325 bool rc = (connect(sock, (sockaddr *)&server, sizeof(server)) == 0); | |
| 326 if (!rc) { | |
| 327 shutdown(sock, SHUT_RDWR); | |
| 328 close(sock); | |
| 329 sock = NULL_SOCKET; | |
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330 last_err = time(NULL); |
| 94 | 331 } |
| 332 } | |
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333 else last_err = time(NULL); |
| 94 | 334 } |
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335 else last_err = time(NULL); |
| 94 | 336 } |
| 337 if (sock != NULL_SOCKET) { | |
| 338 conn = new SMTP(sock); | |
| 339 #ifdef VERIFY_DEBUG | |
| 340 conn->log("get_connection() %d new socket", conn->get_fd()); | |
| 341 #endif | |
| 342 if (conn->helo() == 250) return conn; | |
| 343 delete conn; | |
| 344 } | |
| 345 return NULL; | |
| 346 } | |
| 347 | |
| 348 | |
| 349 void VERIFY::put_connection(SMTP *conn) { | |
| 350 if (conn->err()) { | |
| 351 #ifdef VERIFY_DEBUG | |
| 352 conn->log("put_socket() %d with error, close it", conn->get_fd()); | |
| 353 #endif | |
| 354 delete conn; | |
| 355 last_err = time(NULL); | |
| 356 } | |
| 357 else { | |
| 358 #ifdef VERIFY_DEBUG | |
| 359 conn->log("put_socket() %d", conn->get_fd()); | |
| 360 #endif | |
| 361 conn->now(); | |
| 362 pthread_mutex_lock(&mutex); | |
| 363 connections.push_back(conn); | |
| 364 pthread_mutex_unlock(&mutex); | |
| 365 } | |
| 366 } | |
| 367 | |
| 368 | |
| 369 bool VERIFY::ok(char *from, char *to) { | |
| 370 if (host == token_myhostname) return true; | |
| 371 SMTP *conn = get_connection(); | |
| 372 if (!conn) return true; // cannot verify right now, we have socket errors | |
| 373 int rc; | |
| 374 rc = conn->from(from); | |
| 375 #ifdef VERIFY_DEBUG | |
| 376 conn->log("verify::ok() from sees %d", rc); | |
| 377 #endif | |
| 378 if (rc != 250) { | |
| 379 conn->rset(); | |
| 380 put_connection(conn); | |
| 381 return (rc >= 500) ? false : true; | |
| 382 } | |
| 383 rc = conn->rcpt(to); | |
| 384 #ifdef VERIFY_DEBUG | |
| 385 conn->log("verify::ok() rcpt sees %d", rc); | |
| 386 #endif | |
| 387 put_connection(conn); | |
| 388 return (rc >= 500) ? false : true; | |
| 389 } | |
| 390 | |
| 391 | |
| 153 | 392 //////////////////////////////////////////////// |
| 393 // setup a new smtp verify host | |
| 394 // | |
| 395 VERIFYP add_verify_host(char *host); | |
| 396 VERIFYP add_verify_host(char *host) { | |
| 397 VERIFYP rc = NULL; | |
| 398 pthread_mutex_lock(&verifier_mutex); | |
| 399 verify_map::iterator i = verifiers.find(host); | |
| 400 if (i == verifiers.end()) { | |
| 401 rc = new VERIFY(host); | |
| 402 verifiers[host] = rc; | |
| 403 } | |
| 404 else rc = (*i).second; | |
| 405 pthread_mutex_unlock(&verifier_mutex); | |
| 406 return rc; | |
| 407 } | |
| 408 | |
| 409 | |
| 410 //////////////////////////////////////////////// | |
| 411 // thread to check for verify hosts with old sockets that we can close | |
| 412 // | |
| 413 void* verify_closer(void *arg) { | |
| 414 while (true) { | |
| 415 sleep(maxsmtp_age); | |
| 416 pthread_mutex_lock(&verifier_mutex); | |
| 417 for (verify_map::iterator i=verifiers.begin(); i!=verifiers.end(); i++) { | |
| 418 VERIFYP v = (*i).second; | |
| 419 v->closer(); | |
| 420 } | |
| 421 pthread_mutex_unlock(&verifier_mutex); | |
| 422 } | |
| 423 return NULL; | |
| 424 } | |
| 425 | |
| 426 | |
| 427 //////////////////////////////////////////////// | |
| 428 // automatic whitelister | |
| 429 // | |
| 430 WHITELISTER::WHITELISTER(char *f, int d) { | |
| 431 fn = f; | |
| 432 days = d; | |
| 433 pthread_mutex_init(&mutex, 0); | |
| 434 need = false; | |
| 160 | 435 loaded = time(NULL); |
| 436 merge(); | |
| 437 } | |
| 438 | |
| 439 | |
| 440 void WHITELISTER::merge() { | |
| 441 time_t now = time(NULL); | |
| 154 | 442 ifstream ifs; |
| 443 ifs.open(fn); | |
| 444 if (!ifs.fail()) { | |
| 445 const int maxlen = 1000; | |
| 446 char buf[maxlen]; | |
| 447 while (ifs.getline(buf, maxlen)) { | |
| 448 char *p = strchr(buf, ' '); | |
| 449 if (p) { | |
| 450 *p = '\0'; | |
| 160 | 451 char *who = strdup(buf); |
| 452 time_t when = atoi(p+1); | |
| 453 if ((when == 0) || (when > now)) when = now; | |
| 454 autowhite_sent::iterator i = rcpts.find(who); | |
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455 if (i == rcpts.end()) { |
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456 rcpts[who] = when; |
| 160 | 457 } |
| 458 else { | |
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459 time_t wh = (*i).second; |
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460 if ((when == 1) || (when > wh)) (*i).second = when; |
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461 free(who); |
| 160 | 462 } |
| 154 | 463 } |
| 464 } | |
| 465 } | |
| 466 ifs.close(); | |
| 153 | 467 } |
| 468 | |
| 469 | |
| 470 void WHITELISTER::writer() { | |
| 471 pthread_mutex_lock(&mutex); | |
| 472 time_t limit = time(NULL) - days*86400; | |
| 160 | 473 |
| 474 // check for manually modified autowhitelist file | |
| 475 struct stat st; | |
| 476 if (stat(fn, &st)) need = true; // file has disappeared | |
| 477 else if (st.st_mtime > loaded) { | |
| 478 // file has been manually updated, merge new entries | |
| 479 merge(); | |
| 480 need = true; | |
| 481 } | |
| 482 | |
| 483 // purge old entries | |
| 153 | 484 for (autowhite_sent::iterator i=rcpts.begin(); i!=rcpts.end();) { |
| 485 time_t when = (*i).second; | |
| 486 if (when < limit) { | |
| 154 | 487 char *who = (*i).first; |
| 488 free(who); | |
| 153 | 489 autowhite_sent::iterator j = i; |
| 490 j++; | |
| 491 rcpts.erase(i); | |
| 492 i = j; | |
| 493 need = true; | |
| 494 } | |
| 495 else i++; | |
| 496 } | |
| 160 | 497 |
| 153 | 498 if (need) { |
| 499 // dump the file | |
| 154 | 500 ofstream ofs; |
| 501 ofs.open(fn); | |
| 502 if (!ofs.fail()) { | |
| 153 | 503 for (autowhite_sent::iterator i=rcpts.begin(); i!=rcpts.end(); i++) { |
| 504 char *who = (*i).first; | |
| 505 int when = (*i).second; | |
| 174 | 506 if (!strchr(who, ' ')) { |
| 507 ofs << who << " " << when << endl; | |
| 508 } | |
| 153 | 509 } |
| 510 } | |
| 154 | 511 ofs.close(); |
| 156 | 512 need = false; |
| 160 | 513 loaded = time(NULL); // update load time |
| 153 | 514 } |
| 515 pthread_mutex_unlock(&mutex); | |
| 516 } | |
| 517 | |
| 518 | |
| 519 void WHITELISTER::sent(char *to) { | |
| 154 | 520 // we take ownership of the string |
| 153 | 521 pthread_mutex_lock(&mutex); |
| 522 need = true; | |
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523 autowhite_sent::iterator i = rcpts.find(to); |
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524 if (i == rcpts.end()) { |
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525 rcpts[to] = time(NULL); |
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526 } |
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527 else { |
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528 (*i).second = time(NULL); |
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529 free(to); |
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530 } |
| 153 | 531 pthread_mutex_unlock(&mutex); |
| 532 } | |
| 533 | |
| 534 | |
| 535 bool WHITELISTER::is_white(char *from) { | |
| 536 pthread_mutex_lock(&mutex); | |
| 537 autowhite_sent::iterator i = rcpts.find(from); | |
| 162 | 538 bool rc = (i != rcpts.end()); |
| 153 | 539 pthread_mutex_unlock(&mutex); |
| 540 return rc; | |
| 541 } | |
| 542 | |
| 543 | |
| 544 //////////////////////////////////////////////// | |
| 545 // setup a new auto whitelister file | |
| 546 // | |
| 547 WHITELISTERP add_whitelister_file(char *fn, int days); | |
| 548 WHITELISTERP add_whitelister_file(char *fn, int days) { | |
| 549 WHITELISTERP rc = NULL; | |
| 550 pthread_mutex_lock(&whitelister_mutex); | |
| 551 whitelister_map::iterator i = whitelisters.find(fn); | |
| 552 if (i == whitelisters.end()) { | |
| 553 rc = new WHITELISTER(fn, days); | |
| 554 whitelisters[fn] = rc; | |
| 555 } | |
| 156 | 556 else { |
| 557 rc = (*i).second; | |
| 558 rc->set_days(days); | |
| 559 } | |
| 153 | 560 pthread_mutex_unlock(&whitelister_mutex); |
| 561 return rc; | |
| 562 } | |
| 563 | |
| 564 | |
| 565 //////////////////////////////////////////////// | |
| 566 // thread to check for whitelister hosts with old sockets that we can close | |
| 567 // | |
| 568 void* whitelister_writer(void *arg) { | |
| 569 while (true) { | |
| 570 sleep(maxauto_age); | |
| 571 pthread_mutex_lock(&whitelister_mutex); | |
| 572 for (whitelister_map::iterator i=whitelisters.begin(); i!=whitelisters.end(); i++) { | |
| 573 WHITELISTERP v = (*i).second; | |
| 574 v->writer(); | |
| 575 } | |
| 576 pthread_mutex_unlock(&whitelister_mutex); | |
| 577 } | |
| 578 return NULL; | |
| 579 } | |
| 580 | |
| 581 | |
| 94 | 582 DNSBL::DNSBL(char *n, char *s, char *m) { |
| 583 name = n; | |
| 584 suffix = s; | |
| 585 message = m; | |
| 586 } | |
| 587 | |
| 588 | |
| 589 bool DNSBL::operator==(const DNSBL &rhs) { | |
| 590 return (strcmp(name, rhs.name) == 0) && | |
| 591 (strcmp(suffix, rhs.suffix) == 0) && | |
| 592 (strcmp(message, rhs.message) == 0); | |
| 593 } | |
| 594 | |
| 595 | |
| 596 CONFIG::CONFIG() { | |
| 597 reference_count = 0; | |
| 598 generation = 0; | |
| 599 load_time = 0; | |
| 600 default_context = NULL; | |
| 601 } | |
| 602 | |
| 603 | |
| 604 CONFIG::~CONFIG() { | |
| 146 | 605 if (debug_syslog) { |
| 606 char buf[maxlen]; | |
| 607 snprintf(buf, sizeof(buf), "freeing memory for old configuration generation %d", generation); | |
| 608 my_syslog(buf); | |
| 609 } | |
| 94 | 610 for (context_list::iterator i=contexts.begin(); i!=contexts.end(); i++) { |
| 611 CONTEXT *c = *i; | |
| 612 delete c; | |
| 613 } | |
| 614 } | |
| 615 | |
| 616 | |
| 617 void CONFIG::add_context(CONTEXTP con) { | |
| 618 contexts.push_back(con); | |
| 619 if (!default_context && !con->get_parent()) { | |
| 620 // first global context | |
| 621 default_context = con; | |
| 622 } | |
| 623 } | |
| 624 | |
| 625 | |
| 626 void CONFIG::add_to(char *to, CONTEXTP con) { | |
| 627 context_map::iterator i = env_to.find(to); | |
| 628 if (i != env_to.end()) { | |
| 629 CONTEXTP c = (*i).second; | |
| 630 if ((c != con) && (c != con->get_parent())) { | |
| 631 if (debug_syslog) { | |
| 632 char oldname[maxlen]; | |
| 633 char newname[maxlen]; | |
| 634 char *oldn = c->get_full_name(oldname, maxlen); | |
| 635 char *newn = con->get_full_name(newname, maxlen); | |
| 636 char buf[maxlen*3]; | |
| 637 snprintf(buf, maxlen*3, "both %s and %s claim envelope to %s, the second one wins", oldn, newn, to); | |
| 638 my_syslog(buf); | |
| 639 } | |
| 640 } | |
| 641 } | |
| 642 env_to[to] = con; | |
| 643 } | |
| 644 | |
| 645 | |
| 646 CONTEXTP CONFIG::find_context(char *to) { | |
| 647 context_map::iterator i = env_to.find(to); | |
| 117 | 648 if (i != env_to.end()) return (*i).second; // found user@domain key |
| 94 | 649 char *x = strchr(to, '@'); |
| 650 if (x) { | |
| 651 x++; | |
| 652 i = env_to.find(x); | |
| 117 | 653 if (i != env_to.end()) return (*i).second; // found domain key |
| 94 | 654 char y = *x; |
| 655 *x = '\0'; | |
| 656 i = env_to.find(to); | |
| 657 *x = y; | |
| 658 if (i != env_to.end()) return (*i).second; // found user@ key | |
| 659 } | |
| 660 return default_context; | |
| 661 } | |
| 662 | |
| 663 | |
| 664 void CONFIG::dump() { | |
|
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665 bool spamass = false; |
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666 if (default_context) default_context->dump(true, spamass); |
| 94 | 667 for (context_list::iterator i=contexts.begin(); i!=contexts.end(); i++) { |
| 668 CONTEXTP c = *i; | |
| 669 CONTEXTP p = c->get_parent(); | |
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670 if (!p && (c != default_context)) c->dump(false, spamass); |
| 94 | 671 } |
| 672 char buf[maxlen]; | |
| 673 for (context_map::iterator i=env_to.begin(); i!=env_to.end(); i++) { | |
| 674 char *to = (*i).first; | |
| 675 CONTEXTP con = (*i).second; | |
| 676 printf("// envelope to %s \t-> context %s \n", to, con->get_full_name(buf,maxlen)); | |
| 677 } | |
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678 if (spamass && (spamc == spamc_empty)) { |
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679 printf("// *** warning - spamassassin filtering requested, but spamc not found by autoconf.\n"); |
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680 } |
| 94 | 681 } |
| 682 | |
| 683 | |
| 684 CONTEXT::CONTEXT(CONTEXTP parent_, char *name_) { | |
| 685 parent = parent_; | |
| 686 name = name_; | |
| 687 verify_host = NULL; | |
| 153 | 688 verifier = NULL; |
| 168 | 689 generic_regx = NULL; |
| 690 generic_message = NULL; | |
| 153 | 691 autowhite_file = NULL; |
| 692 whitelister = NULL; | |
| 94 | 693 env_from_default = (parent) ? token_inherit : token_unknown; |
| 694 content_filtering = (parent) ? parent->content_filtering : false; | |
| 695 content_suffix = NULL; | |
| 696 content_message = NULL; | |
| 119 | 697 uribl_suffix = NULL; |
| 698 uribl_message = NULL; | |
| 94 | 699 host_limit = (parent) ? parent->host_limit : 0; |
| 700 host_limit_message = NULL; | |
| 701 host_random = (parent) ? parent->host_random : false; | |
| 702 tag_limit = (parent) ? parent->tag_limit : 0; | |
| 703 tag_limit_message = NULL; | |
| 163 | 704 spamassassin_limit = (parent) ? parent->spamassassin_limit : 0; |
| 178 | 705 require_match = (parent) ? parent->require_match : false; |
| 706 dcc_greylist = (parent) ? parent->dcc_greylist : false; | |
| 707 dcc_bulk_threshold = (parent) ? parent->dcc_bulk_threshold : 0; | |
| 140 | 708 default_rcpt_rate = INT_MAX; |
| 94 | 709 } |
| 710 | |
| 711 | |
| 712 CONTEXT::~CONTEXT() { | |
| 713 for (dnsblp_map::iterator i=dnsbl_names.begin(); i!=dnsbl_names.end(); i++) { | |
| 714 DNSBLP d = (*i).second; | |
| 715 // delete the underlying DNSBL objects. | |
| 716 delete d; | |
| 717 } | |
| 170 | 718 if (generic_regx) regfree(&generic_pattern); |
| 94 | 719 } |
| 720 | |
| 721 | |
| 722 bool CONTEXT::is_parent(CONTEXTP p) { | |
| 723 if (p == parent) return true; | |
| 724 if (!parent) return false; | |
| 725 return parent->is_parent(p); | |
| 726 } | |
| 727 | |
| 728 | |
| 729 char *CONTEXT::get_full_name(char *buffer, int size) { | |
| 730 if (!parent) return name; | |
| 731 char buf[maxlen]; | |
| 732 snprintf(buffer, size, "%s.%s", parent->get_full_name(buf, maxlen), name); | |
| 733 return buffer; | |
| 734 } | |
| 735 | |
| 736 | |
| 168 | 737 bool CONTEXT::set_generic(char *regx, char *msg) |
| 738 { | |
| 739 int rc = 0; | |
| 170 | 740 if (generic_regx) regfree(&generic_pattern); |
| 168 | 741 generic_regx = regx; |
| 742 generic_message = msg; | |
| 170 | 743 if (generic_regx) { |
| 168 | 744 rc = regcomp(&generic_pattern, regx, REG_NOSUB | REG_ICASE | REG_EXTENDED); |
| 745 } | |
| 746 return rc; // true iff bad pattern | |
| 747 } | |
| 748 | |
| 749 | |
| 750 char *CONTEXT::generic_match(char *client) | |
| 751 { | |
| 752 if (parent && !generic_regx) return parent->generic_match(client); | |
| 170 | 753 if (!generic_regx) return NULL; |
| 168 | 754 if (0 == regexec(&generic_pattern, client, 0, NULL, 0)) { |
| 755 return generic_message; | |
| 756 } | |
| 757 return NULL; | |
| 758 } | |
| 759 | |
| 760 | |
| 94 | 761 bool CONTEXT::cover_env_to(char *to) { |
| 762 char buffer[maxlen]; | |
| 763 char *x = strchr(to, '@'); | |
| 764 if (x) x++; | |
| 765 else x = to; | |
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766 if (*x == '\0') return true; // always allow covering addresses with no domain name, eg abuse@ |
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767 if (!parent && env_to.empty()) return true; // empty env_to at global level covers everything |
| 94 | 768 string_set::iterator i = env_to.find(x); |
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769 if (i != env_to.end()) return true; // we cover the entire domain |
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770 if (x != to) { |
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771 i = env_to.find(to); |
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772 if (i != env_to.end()) return true; // we cover the specific email address |
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773 } |
| 94 | 774 return false; |
| 775 } | |
| 776 | |
| 777 | |
| 778 VERIFYP CONTEXT::find_verify(char *to) { | |
| 153 | 779 if (verifier && (verify_host != token_myhostname) && cover_env_to(to)) |
| 780 return verifier; | |
| 781 else if (parent) | |
| 782 return parent->find_verify(to); | |
| 783 else | |
| 784 return NULL; | |
| 785 } | |
| 94 | 786 |
| 153 | 787 |
| 162 | 788 WHITELISTERP CONTEXT::find_autowhite(char *from, char *to) { |
| 789 if (whitelister && cover_env_to(to) && !cover_env_to(from)) | |
| 153 | 790 return whitelister; |
| 791 else if (parent) | |
| 162 | 792 return parent->find_autowhite(from, to); |
| 153 | 793 else |
| 794 return NULL; | |
| 94 | 795 } |
| 796 | |
| 797 | |
| 136 | 798 int CONTEXT::find_rate(char *user) { |
| 140 | 799 if (rcpt_per_hour.empty()) return default_rcpt_rate; |
| 136 | 800 rcpt_rates::iterator i = rcpt_per_hour.find(user); |
| 140 | 801 return (i == rcpt_per_hour.end()) ? default_rcpt_rate : (*i).second; |
| 136 | 802 } |
| 803 | |
| 804 | |
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805 char *CONTEXT::find_from(char *from, bool update_white) { |
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806 if (whitelister && whitelister->is_white(from)) { |
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807 if (update_white) { |
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808 // update senders timestamp to extend the whitelisting period |
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809 if (debug_syslog > 1) { |
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810 char buf[maxlen]; |
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811 char msg[maxlen]; |
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812 snprintf(msg, sizeof(msg), "extend whitelist reply from <%s> in context %s", from, get_full_name(buf,maxlen)); |
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813 my_syslog(msg); |
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814 } |
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815 whitelister->sent(strdup(from)); |
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816 } |
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817 return token_white; |
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818 } |
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819 char *rc = env_from_default; |
| 94 | 820 string_map::iterator i = env_from.find(from); |
| 117 | 821 if (i != env_from.end()) rc = (*i).second; // found user@domain key |
| 94 | 822 else { |
| 823 char *x = strchr(from, '@'); | |
| 824 if (x) { | |
| 825 x++; | |
| 826 i = env_from.find(x); | |
| 117 | 827 if (i != env_from.end()) rc = (*i).second; // found domain key |
| 94 | 828 else { |
| 829 char y = *x; | |
| 830 *x = '\0'; | |
| 831 i = env_from.find(from); | |
| 832 *x = y; | |
| 833 if (i != env_from.end()) rc = (*i).second; // found user@ key | |
| 834 } | |
| 835 } | |
| 836 } | |
| 837 if ((rc == token_inherit) && parent) return parent->find_from(from); | |
| 838 return (rc == token_inherit) ? token_unknown : rc; | |
| 839 } | |
| 840 | |
| 841 | |
| 842 CONTEXTP CONTEXT::find_context(char *from) { | |
| 843 context_map::iterator i = env_from_context.find(from); | |
| 117 | 844 if (i != env_from_context.end()) return (*i).second; // found user@domain key |
| 94 | 845 char *x = strchr(from, '@'); |
| 846 if (x) { | |
| 847 x++; | |
| 848 i = env_from_context.find(x); | |
| 117 | 849 if (i != env_from_context.end()) return (*i).second; // found domain key |
| 94 | 850 char y = *x; |
| 851 *x = '\0'; | |
| 852 i = env_from_context.find(from); | |
| 853 *x = y; | |
| 854 if (i != env_from_context.end()) return (*i).second; // found user@ key | |
| 855 } | |
| 856 return this; | |
| 857 } | |
| 858 | |
| 859 | |
| 860 CONTEXTP CONTEXT::find_from_context_name(char *name) { | |
| 861 context_map::iterator i = children.find(name); | |
| 862 if (i != children.end()) return (*i).second; | |
| 863 return NULL; | |
| 864 } | |
| 865 | |
| 866 | |
| 867 DNSBLP CONTEXT::find_dnsbl(char *name) { | |
| 868 dnsblp_map::iterator i = dnsbl_names.find(name); | |
| 869 if (i != dnsbl_names.end()) return (*i).second; | |
| 870 if (parent) return parent->find_dnsbl(name); | |
| 871 return NULL; | |
| 872 } | |
| 873 | |
| 874 | |
| 875 char* CONTEXT::get_content_suffix() { | |
| 876 if (!content_suffix && parent) return parent->get_content_suffix(); | |
| 877 return content_suffix; | |
| 878 } | |
| 879 | |
| 880 | |
| 119 | 881 char* CONTEXT::get_uribl_suffix() { |
| 882 if (!uribl_suffix && parent) return parent->get_uribl_suffix(); | |
| 883 return uribl_suffix; | |
| 884 } | |
| 885 | |
| 886 | |
| 94 | 887 char* CONTEXT::get_content_message() { |
| 888 if (!content_message && parent) return parent->get_content_message(); | |
| 889 return content_message; | |
| 890 } | |
| 891 | |
| 892 | |
| 119 | 893 char* CONTEXT::get_uribl_message() { |
| 894 if (!uribl_message && parent) return parent->get_uribl_message(); | |
| 895 return uribl_message; | |
| 896 } | |
| 897 | |
| 898 | |
| 94 | 899 string_set& CONTEXT::get_content_host_ignore() { |
| 900 if (content_host_ignore.empty() && parent) return parent->get_content_host_ignore(); | |
| 901 return content_host_ignore; | |
| 902 } | |
| 903 | |
| 904 | |
| 117 | 905 string_set& CONTEXT::get_content_cctlds() { |
| 906 if (content_cctlds.empty() && parent) return parent->get_content_cctlds(); | |
| 907 return content_cctlds; | |
| 908 } | |
| 909 | |
| 94 | 910 string_set& CONTEXT::get_content_tlds() { |
| 911 if (content_tlds.empty() && parent) return parent->get_content_tlds(); | |
| 912 return content_tlds; | |
| 913 } | |
| 914 | |
| 915 | |
| 916 string_set& CONTEXT::get_html_tags() { | |
| 917 if (html_tags.empty() && parent) return parent->get_html_tags(); | |
| 918 return html_tags; | |
| 919 } | |
| 920 | |
| 921 | |
| 922 dnsblp_list& CONTEXT::get_dnsbl_list() { | |
| 923 if (dnsbl_list.empty() && parent) return parent->get_dnsbl_list(); | |
| 924 return dnsbl_list; | |
| 925 } | |
| 926 | |
| 927 | |
| 178 | 928 bool CONTEXT::acceptable_content(recorder &memory, int score, int bulk, string& msg) { |
| 163 | 929 if (spamassassin_limit && (score > spamassassin_limit)) { |
|
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930 char buf[maxlen]; |
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931 snprintf(buf, sizeof(buf), "Mail rejected - spam assassin score %d", score); |
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932 msg = string(buf); |
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933 return false; |
| 163 | 934 } |
| 178 | 935 if (dcc_bulk_threshold && (bulk > dcc_bulk_threshold)) { |
| 936 char buf[maxlen]; | |
| 937 snprintf(buf, sizeof(buf), "Mail rejected - dcc score %d", bulk); | |
| 938 msg = string(buf); | |
| 939 return false; | |
| 940 } | |
| 94 | 941 if (memory.excessive_bad_tags(tag_limit)) { |
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942 msg = string(tag_limit_message); |
| 94 | 943 return false; |
| 944 } | |
| 945 if (!host_random && memory.excessive_hosts(host_limit)) { | |
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946 msg = string(host_limit_message); |
| 94 | 947 return false; |
| 948 } | |
| 949 return true; | |
| 950 } | |
| 951 | |
| 952 | |
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953 void CONTEXT::dump(bool isdefault, bool &spamass, int level) { |
| 94 | 954 char indent[maxlen]; |
| 955 int i = min(maxlen-1, level*4); | |
| 956 memset(indent, ' ', i); | |
| 957 indent[i] = '\0'; | |
| 958 char buf[maxlen]; | |
| 959 char *fullname = get_full_name(buf,maxlen); | |
| 960 printf("%s context %s { \t// %s\n", indent, name, fullname); | |
| 961 | |
| 962 for (dnsblp_map::iterator i=dnsbl_names.begin(); i!=dnsbl_names.end(); i++) { | |
| 963 char *n = (*i).first; | |
| 964 DNSBL &d = *(*i).second; | |
| 965 printf("%s dnsbl %s %s \"%s\"; \n", indent, n, d.suffix, d.message); | |
| 966 } | |
| 967 | |
| 145 | 968 dnsblp_list dl = get_dnsbl_list(); |
| 969 if (!dl.empty()) { | |
| 94 | 970 printf("%s dnsbl_list", indent); |
| 145 | 971 for (dnsblp_list::iterator i=dl.begin(); i!=dl.end(); i++) { |
| 94 | 972 DNSBL &d = *(*i); |
| 973 printf(" %s", d.name); | |
| 974 } | |
| 975 printf("; \n"); | |
| 976 } | |
| 977 | |
| 978 if (content_filtering) { | |
| 979 printf("%s content on { \n", indent, env_from_default); | |
| 980 if (content_suffix) { | |
| 981 printf("%s filter %s \"%s\"; \n", indent, content_suffix, content_message); | |
| 982 } | |
| 119 | 983 if (uribl_suffix) { |
| 984 printf("%s uribl %s \"%s\"; \n", indent, uribl_suffix, uribl_message); | |
| 985 } | |
| 94 | 986 if (!content_host_ignore.empty()) { |
| 987 printf("%s ignore { \n", indent); | |
| 988 for (string_set::iterator i=content_host_ignore.begin(); i!=content_host_ignore.end(); i++) { | |
| 989 printf("%s %s; \n", indent, *i); | |
| 990 } | |
| 991 printf("%s }; \n", indent); | |
| 992 } | |
| 117 | 993 if (!content_cctlds.empty()) { |
| 994 printf("%s cctld { \n", indent); | |
| 995 printf("%s ", indent); | |
| 996 for (string_set::iterator i=content_cctlds.begin(); i!=content_cctlds.end(); i++) { | |
| 997 printf("%s; ", *i); | |
| 998 } | |
| 999 printf("\n%s }; \n", indent); | |
| 1000 } | |
| 94 | 1001 if (!content_tlds.empty()) { |
| 1002 printf("%s tld { \n", indent); | |
| 1003 printf("%s ", indent); | |
| 1004 for (string_set::iterator i=content_tlds.begin(); i!=content_tlds.end(); i++) { | |
| 1005 printf("%s; ", *i); | |
| 1006 } | |
| 1007 printf("\n%s }; \n", indent); | |
| 1008 } | |
| 1009 if (!html_tags.empty()) { | |
| 1010 printf("%s html_tags { \n", indent); | |
| 1011 printf("%s ", indent); | |
| 1012 for (string_set::iterator i=html_tags.begin(); i!=html_tags.end(); i++) { | |
| 1013 printf("%s; ", *i); | |
| 1014 } | |
| 1015 printf("\n%s }; \n", indent); | |
| 1016 } | |
| 1017 if (host_limit_message) { | |
| 1018 printf("%s host_limit on %d \"%s\"; \n", indent, host_limit, host_limit_message); | |
| 1019 } | |
| 1020 else if (host_random) { | |
| 1021 printf("%s host_limit soft %d; \n", indent, host_limit); | |
| 1022 } | |
| 1023 else { | |
| 1024 printf("%s host_limit off; \n", indent); | |
| 1025 } | |
| 1026 if (tag_limit_message) { | |
| 1027 printf("%s html_limit on %d \"%s\"; \n", indent, tag_limit, tag_limit_message); | |
| 1028 } | |
| 1029 else { | |
| 1030 printf("%s html_limit off; \n", indent); | |
| 1031 } | |
| 163 | 1032 printf("%s spamassassin %d; \n", indent, spamassassin_limit); |
| 178 | 1033 printf("%s require_match %s; \n", indent, (require_match) ? "yes" : "no"); |
| 1034 printf("%s dcc_greylist %s; \n", indent, (dcc_greylist) ? "yes" : "no"); | |
| 1035 if (dcc_bulk_threshold == 0) printf("%s dcc_bulk_threshold off; \n", indent); | |
| 180 | 1036 else if (dcc_bulk_threshold >= dccbulk) printf("%s dcc_bulk_threshold many; \n", indent); |
| 178 | 1037 else printf("%s dcc_bulk_threshold %d; \n", indent, dcc_bulk_threshold); |
| 94 | 1038 printf("%s }; \n", indent); |
|
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1039 spamass |= (spamassassin_limit != 0); |
| 94 | 1040 } |
| 1041 else { | |
| 1042 printf("%s content off {}; \n", indent, env_from_default); | |
| 1043 } | |
| 1044 | |
| 1045 printf("%s env_to { \t// %s\n", indent, fullname); | |
| 1046 for (string_set::iterator i=env_to.begin(); i!=env_to.end(); i++) { | |
| 1047 printf("%s %s; \n", indent, *i); | |
| 1048 } | |
| 1049 printf("%s }; \n", indent); | |
| 1050 | |
| 1051 if (verify_host) { | |
| 1052 printf("%s verify %s; \n", indent, verify_host); | |
| 1053 } | |
| 1054 | |
| 168 | 1055 if (generic_regx) { |
| 1056 printf("%s generic \"%s\" \n", indent, generic_regx); | |
| 1057 printf("%s \"%s\"; \n", indent, generic_message); | |
| 1058 } | |
| 1059 | |
| 153 | 1060 if (autowhite_file && whitelister) { |
| 1061 printf("%s autowhite %d %s; \n", indent, whitelister->get_days(), autowhite_file); | |
| 1062 } | |
| 1063 | |
| 94 | 1064 for (context_map::iterator i=children.begin(); i!=children.end(); i++) { |
| 1065 CONTEXTP c = (*i).second; | |
|
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1066 c->dump(false, spamass, level+1); |
| 94 | 1067 } |
| 1068 | |
| 1069 printf("%s env_from %s { \t// %s\n", indent, env_from_default, fullname); | |
| 1070 if (!env_from.empty()) { | |
| 1071 printf("%s // white/black/unknown \n", indent); | |
| 1072 for (string_map::iterator i=env_from.begin(); i!=env_from.end(); i++) { | |
| 1073 char *f = (*i).first; | |
| 1074 char *t = (*i).second; | |
| 1075 printf("%s %s \t%s; \n", indent, f, t); | |
| 1076 } | |
| 1077 } | |
| 1078 if (!env_from_context.empty()) { | |
| 1079 printf("%s // child contexts \n", indent); | |
| 1080 for (context_map::iterator j=env_from_context.begin(); j!=env_from_context.end(); j++) { | |
| 1081 char *f = (*j).first; | |
| 1082 CONTEXTP t = (*j).second; | |
| 1083 printf("%s %s \t%s; \n", indent, f, t->name); | |
| 1084 } | |
| 1085 } | |
| 1086 printf("%s }; \n", indent); | |
| 1087 | |
|
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1088 if (isdefault) { |
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1089 printf("%s rate_limit %d { \n", indent, default_rcpt_rate); |
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1090 for (rcpt_rates::iterator j=rcpt_per_hour.begin(); j!=rcpt_per_hour.end(); j++) { |
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1091 char *u = (*j).first; |
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1092 int l = (*j).second; |
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1093 printf("%s \"%s\" \t%d; \n", indent, u, l); |
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1094 } |
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1095 printf("%s }; \n", indent); |
| 136 | 1096 } |
| 1097 | |
| 94 | 1098 printf("%s }; \n", indent); |
| 1099 } | |
| 1100 | |
| 1101 | |
| 1102 //////////////////////////////////////////////// | |
| 1103 // helper to discard the strings held by a string_set | |
| 1104 // | |
| 1105 void discard(string_set &s) { | |
| 1106 for (string_set::iterator i=s.begin(); i!=s.end(); i++) { | |
| 1107 free(*i); | |
| 1108 } | |
| 1109 s.clear(); | |
| 1110 } | |
| 1111 | |
| 1112 | |
| 1113 //////////////////////////////////////////////// | |
| 1114 // helper to register a string in a string set | |
| 1115 // | |
| 1116 char* register_string(string_set &s, char *name) { | |
| 1117 string_set::iterator i = s.find(name); | |
| 1118 if (i != s.end()) return *i; | |
| 1119 char *x = strdup(name); | |
| 1120 s.insert(x); | |
| 1121 return x; | |
| 1122 } | |
| 1123 | |
| 1124 | |
| 1125 //////////////////////////////////////////////// | |
| 1126 // register a global string | |
| 1127 // | |
| 1128 char* register_string(char *name) { | |
| 1129 return register_string(all_strings, name); | |
| 1130 } | |
| 1131 | |
| 1132 | |
| 1133 //////////////////////////////////////////////// | |
| 164 | 1134 // clear all global strings, helper for valgrind checking |
| 1135 // | |
| 1136 void clear_strings() { | |
| 1137 discard(all_strings); | |
| 1138 } | |
| 1139 | |
| 1140 | |
| 1141 //////////////////////////////////////////////// | |
| 94 | 1142 // |
| 1143 bool tsa(TOKEN &tok, char *token); | |
| 1144 bool tsa(TOKEN &tok, char *token) { | |
| 1145 char *have = tok.next(); | |
| 1146 if (have == token) return true; | |
| 1147 tok.token_error(token, have); | |
| 1148 return false; | |
| 1149 } | |
| 1150 | |
| 1151 | |
| 1152 //////////////////////////////////////////////// | |
| 1153 // | |
| 1154 bool parse_dnsbl(TOKEN &tok, CONFIG &dc, CONTEXT &me); | |
| 1155 bool parse_dnsbl(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 1156 char *name = tok.next(); | |
| 1157 char *suf = tok.next(); | |
| 1158 char *msg = tok.next(); | |
| 1159 if (!tsa(tok, token_semi)) return false; | |
| 1160 DNSBLP dnsnew = new DNSBL(name, suf, msg); | |
| 1161 DNSBLP dnsold = me.find_dnsbl(name); | |
| 1162 if (dnsold && (*dnsold == *dnsnew)) { | |
| 1163 // duplicate redefinition, ignore it | |
| 1164 delete dnsnew; | |
| 1165 return true; | |
| 1166 } | |
| 1167 me.add_dnsbl(name, dnsnew); | |
| 1168 return true; | |
| 1169 } | |
| 1170 | |
| 1171 | |
| 1172 //////////////////////////////////////////////// | |
| 1173 // | |
| 1174 bool parse_dnsbll(TOKEN &tok, CONFIG &dc, CONTEXT &me); | |
| 1175 bool parse_dnsbll(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 1176 while (true) { | |
| 1177 char *have = tok.next(); | |
| 1178 if (!have) break; | |
| 1179 if (have == token_semi) break; | |
| 1180 DNSBLP dns = me.find_dnsbl(have); | |
| 1181 if (dns) { | |
| 1182 me.add_dnsbl(dns); | |
| 1183 } | |
| 1184 else { | |
| 1185 tok.token_error("dnsbl name", have); | |
| 1186 return false; | |
| 1187 } | |
| 1188 } | |
| 1189 return true; | |
| 1190 } | |
| 1191 | |
| 1192 | |
| 1193 //////////////////////////////////////////////// | |
| 1194 // | |
| 1195 bool parse_content(TOKEN &tok, CONFIG &dc, CONTEXT &me); | |
| 1196 bool parse_content(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 1197 char *setting = tok.next(); | |
| 1198 if (setting == token_on) { | |
| 1199 me.set_content_filtering(true); | |
| 1200 } | |
| 1201 else if (setting == token_off) { | |
| 1202 me.set_content_filtering(false); | |
| 1203 } | |
| 1204 else { | |
| 1205 tok.token_error("on/off", setting); | |
| 1206 return false; | |
| 1207 } | |
| 1208 if (!tsa(tok, token_lbrace)) return false; | |
| 1209 while (true) { | |
| 1210 char *have = tok.next(); | |
| 1211 if (!have) break; | |
| 1212 if (have == token_filter) { | |
| 1213 char *suffix = tok.next(); | |
| 1214 char *messag = tok.next(); | |
| 1215 me.set_content_suffix(suffix); | |
| 1216 me.set_content_message(messag); | |
| 1217 if (!tsa(tok, token_semi)) return false; | |
| 1218 } | |
| 119 | 1219 else if (have == token_uribl) { |
| 1220 char *suffix = tok.next(); | |
| 1221 char *messag = tok.next(); | |
| 1222 me.set_uribl_suffix(suffix); | |
| 1223 me.set_uribl_message(messag); | |
| 1224 if (!tsa(tok, token_semi)) return false; | |
| 1225 } | |
| 94 | 1226 else if (have == token_ignore) { |
| 1227 if (!tsa(tok, token_lbrace)) return false; | |
| 1228 while (true) { | |
| 1229 if (!have) break; | |
| 1230 char *have = tok.next(); | |
| 1231 if (have == token_rbrace) break; // done | |
| 1232 me.add_ignore(have); | |
| 1233 } | |
| 1234 if (!tsa(tok, token_semi)) return false; | |
| 1235 } | |
| 1236 else if (have == token_tld) { | |
| 1237 if (!tsa(tok, token_lbrace)) return false; | |
| 1238 while (true) { | |
| 1239 char *have = tok.next(); | |
| 1240 if (!have) break; | |
| 1241 if (have == token_rbrace) break; // done | |
| 1242 me.add_tld(have); | |
| 1243 } | |
| 1244 if (!tsa(tok, token_semi)) return false; | |
| 1245 } | |
| 178 | 1246 else if (have == token_cctld) { |
| 1247 if (!tsa(tok, token_lbrace)) return false; | |
| 1248 while (true) { | |
| 1249 char *have = tok.next(); | |
| 1250 if (!have) break; | |
| 1251 if (have == token_rbrace) break; // done | |
| 1252 me.add_cctld(have); | |
| 94 | 1253 } |
| 1254 if (!tsa(tok, token_semi)) return false; | |
| 1255 } | |
| 1256 else if (have == token_html_tags) { | |
| 1257 if (!tsa(tok, token_lbrace)) return false; | |
| 1258 while (true) { | |
| 1259 char *have = tok.next(); | |
| 1260 if (!have) break; | |
| 1261 if (have == token_rbrace) { | |
| 1262 break; // done | |
| 1263 } | |
| 1264 else { | |
| 1265 me.add_tag(have); // base version | |
| 1266 char buf[200]; | |
| 1267 snprintf(buf, sizeof(buf), "/%s", have); | |
| 1268 me.add_tag(register_string(buf)); // leading / | |
| 1269 snprintf(buf, sizeof(buf), "%s/", have); | |
| 1270 me.add_tag(register_string(buf)); // trailing / | |
| 1271 } | |
| 1272 } | |
| 1273 if (!tsa(tok, token_semi)) return false; | |
| 1274 } | |
| 178 | 1275 else if (have == token_html_limit) { |
| 1276 have = tok.next(); | |
| 1277 if (have == token_on) { | |
| 1278 me.set_tag_limit(tok.nextint()); | |
| 1279 me.set_tag_message(tok.next()); | |
| 1280 } | |
| 1281 else if (have == token_off) { | |
| 1282 me.set_tag_limit(0); | |
| 1283 me.set_tag_message(NULL); | |
| 1284 } | |
| 1285 else { | |
| 1286 tok.token_error("on/off", have); | |
| 1287 return false; | |
| 1288 } | |
| 1289 if (!tsa(tok, token_semi)) return false; | |
| 1290 } | |
| 94 | 1291 else if (have == token_host_limit) { |
| 1292 have = tok.next(); | |
| 1293 if (have == token_on) { | |
| 1294 me.set_host_limit(tok.nextint()); | |
| 1295 me.set_host_message(tok.next()); | |
| 1296 me.set_host_random(false); | |
| 1297 } | |
| 1298 else if (have == token_off) { | |
| 1299 me.set_host_limit(0); | |
| 1300 me.set_host_message(NULL); | |
| 1301 me.set_host_random(false); | |
| 1302 } | |
| 1303 else if (have == token_soft) { | |
| 1304 me.set_host_limit(tok.nextint()); | |
| 1305 me.set_host_message(NULL); | |
| 1306 me.set_host_random(true); | |
| 1307 } | |
| 1308 else { | |
| 1309 tok.token_error("on/off/soft", have); | |
| 1310 return false; | |
| 1311 } | |
| 1312 if (!tsa(tok, token_semi)) return false; | |
| 1313 } | |
| 163 | 1314 else if (have == token_spamassassin) { |
| 1315 me.set_spamassassin_limit(tok.nextint()); | |
| 1316 if (!tsa(tok, token_semi)) return false; | |
| 1317 } | |
| 178 | 1318 else if (have == token_require) { |
| 1319 have = tok.next(); | |
| 1320 if (have == token_yes) me.set_require(true); | |
| 1321 else if (have == token_no) me.set_require(false); | |
| 1322 else { | |
| 1323 tok.token_error("yes/no", have); | |
| 1324 return false; | |
| 1325 } | |
| 1326 if (!tsa(tok, token_semi)) return false; | |
| 1327 } | |
| 1328 else if (have == token_dccgrey) { | |
| 1329 have = tok.next(); | |
| 1330 if (have == token_yes) me.set_grey(true); | |
| 1331 else if (have == token_no) me.set_grey(false); | |
| 1332 else { | |
| 1333 tok.token_error("yes/no", have); | |
| 1334 return false; | |
| 1335 } | |
| 1336 if (!tsa(tok, token_semi)) return false; | |
| 1337 } | |
| 1338 else if (have == token_dccbulk) { | |
| 1339 have = tok.next(); | |
| 1340 if (have == token_off) me.set_bulk(0); | |
| 180 | 1341 else if (have == token_many) me.set_bulk(dccbulk); |
| 178 | 1342 else { |
| 1343 char *e; | |
| 1344 long i = strtol(have, &e, 10); | |
| 1345 if (*e != '\0') { | |
| 1346 tok.token_error("integer", have); | |
| 1347 return false; | |
| 1348 } | |
| 1349 me.set_bulk((int)i); | |
| 1350 } | |
| 1351 if (!tsa(tok, token_semi)) return false; | |
| 1352 } | |
| 94 | 1353 else if (have == token_rbrace) { |
| 1354 break; // done | |
| 1355 } | |
| 1356 else { | |
| 1357 tok.token_error("content keyword", have); | |
| 1358 return false; | |
| 1359 } | |
| 1360 } | |
| 1361 return tsa(tok, token_semi); | |
| 1362 } | |
| 1363 | |
| 1364 | |
| 1365 //////////////////////////////////////////////// | |
| 1366 // | |
| 1367 bool parse_envto(TOKEN &tok, CONFIG &dc, CONTEXT &me); | |
| 1368 bool parse_envto(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 1369 if (!tsa(tok, token_lbrace)) return false; | |
| 1370 while (true) { | |
| 1371 char *have = tok.next(); | |
| 1372 if (!have) break; | |
| 1373 if (have == token_rbrace) break; | |
| 1374 if (have == token_semi) { | |
| 1375 // optional separators | |
| 1376 } | |
| 1377 else if (have == token_dccto) { | |
| 1378 char *flavor = tok.next(); | |
| 1379 if (!tsa(tok, token_lbrace)) return false; | |
| 1380 bool keeping = false; | |
| 1381 while (true) { | |
| 1382 char *have = tok.next(); | |
| 1383 if (!have) break; | |
| 1384 if (have == token_rbrace) break; | |
| 1385 if (have == flavor) { | |
| 1386 keeping = true; | |
| 1387 continue; | |
| 1388 } | |
| 1389 else if ((have == token_ok) || (have == token_ok2) || (have == token_many)) { | |
| 1390 keeping = false; | |
| 1391 continue; | |
| 1392 } | |
| 1393 if (have == token_envto) { | |
| 1394 have = tok.next(); | |
| 1395 if (keeping) { | |
| 1396 if (me.allow_env_to(have)) { | |
| 1397 me.add_to(have); | |
| 1398 dc.add_to(have, &me); | |
| 1399 } | |
| 1400 } | |
| 1401 } | |
| 1402 //else if (have == token_substitute) { | |
| 1403 // if (tok.next() == token_mailhost) { | |
| 1404 // have = tok.next(); | |
| 1405 // if (keeping) { | |
| 1406 // if (me.allow_env_to(have)) { | |
| 1407 // me.add_to(have); | |
| 1408 // dc.add_to(have, &me); | |
| 1409 // } | |
| 1410 // } | |
| 1411 // } | |
| 1412 //} | |
| 1413 tok.skipeol(); | |
| 1414 } | |
| 1415 } | |
| 1416 else if (me.allow_env_to(have)) { | |
| 1417 me.add_to(have); | |
| 1418 dc.add_to(have, &me); | |
| 1419 } | |
| 1420 else { | |
| 1421 tok.token_error("user@ or user@domain.tld or domain.tld where domain.tld allowed by parent context", have); | |
| 1422 return false; | |
| 1423 } | |
| 1424 } | |
| 1425 return tsa(tok, token_semi); | |
| 1426 } | |
| 1427 | |
| 1428 | |
| 1429 //////////////////////////////////////////////// | |
| 1430 // | |
| 1431 bool parse_verify(TOKEN &tok, CONFIG &dc, CONTEXT &me); | |
| 1432 bool parse_verify(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 1433 char *host = tok.next(); | |
| 1434 if (!tsa(tok, token_semi)) return false; | |
| 1435 me.set_verify(host); | |
| 153 | 1436 me.set_verifier(add_verify_host(host)); |
| 1437 return true; | |
| 1438 } | |
| 1439 | |
| 1440 | |
| 1441 //////////////////////////////////////////////// | |
| 1442 // | |
| 168 | 1443 bool parse_generic(TOKEN &tok, CONFIG &dc, CONTEXT &me); |
| 1444 bool parse_generic(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 1445 char *regx = tok.next(); | |
| 1446 char *msg = tok.next(); | |
| 1447 if (!tsa(tok, token_semi)) return false; | |
| 1448 if (me.set_generic(regx, msg)) { | |
| 1449 tok.token_error("invalid regular expression %s", regx, regx); | |
| 1450 return false; | |
| 1451 } | |
| 1452 return true; | |
| 1453 } | |
| 1454 | |
| 1455 | |
| 1456 //////////////////////////////////////////////// | |
| 1457 // | |
| 153 | 1458 bool parse_autowhite(TOKEN &tok, CONFIG &dc, CONTEXT &me); |
| 1459 bool parse_autowhite(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 1460 int days = tok.nextint(); | |
| 1461 char *fn = tok.next(); | |
| 1462 if (!tsa(tok, token_semi)) return false; | |
| 1463 me.set_autowhite(fn); | |
| 1464 me.set_whitelister(add_whitelister_file(fn, days)); | |
| 99 | 1465 return true; |
| 94 | 1466 } |
| 1467 | |
| 1468 | |
| 1469 //////////////////////////////////////////////// | |
| 1470 // | |
| 1471 bool parse_envfrom(TOKEN &tok, CONFIG &dc, CONTEXT &me); | |
| 1472 bool parse_envfrom(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 1473 char *st = tok.next(); | |
| 1474 if ((st == token_black) || (st == token_white) || (st == token_unknown) || (st == token_inherit)) { | |
| 1475 me.set_from_default(st); | |
| 1476 } | |
| 1477 else { | |
| 1478 tok.push(st); | |
| 1479 } | |
| 1480 if (!tsa(tok, token_lbrace)) return false; | |
| 1481 while (true) { | |
| 1482 char *have = tok.next(); | |
| 1483 if (!have) break; | |
| 1484 if (have == token_rbrace) break; | |
| 1485 if (have == token_semi) { | |
| 1486 // optional separators | |
| 1487 } | |
| 1488 else if (have == token_dccfrom) { | |
| 1489 if (!tsa(tok, token_lbrace)) return false; | |
| 1490 bool keeping = false; | |
| 1491 bool many = false; | |
| 1492 while (true) { | |
| 1493 char *have = tok.next(); | |
| 1494 if (!have) break; | |
| 1495 if (have == token_rbrace) break; | |
| 1496 if (have == token_ok) { | |
| 1497 keeping = true; | |
| 1498 many = false; | |
| 1499 continue; | |
| 1500 } | |
| 1501 else if (have == token_many) { | |
| 1502 keeping = true; | |
| 1503 many = true; | |
| 1504 continue; | |
| 1505 } | |
| 1506 else if (have == token_ok2) { | |
| 1507 keeping = false; | |
| 1508 continue; | |
| 1509 } | |
| 1510 if (have == token_envfrom) { | |
| 1511 have = tok.next(); | |
| 1512 if (keeping) { | |
| 1513 me.add_from(have, (many) ? token_black : token_white); | |
| 1514 } | |
| 1515 } | |
| 1516 else if (have == token_substitute) { | |
| 1517 if (tok.next() == token_mailhost) { | |
| 1518 have = tok.next(); | |
| 1519 me.add_from(have, (many) ? token_black : token_white); | |
| 1520 } | |
| 1521 } | |
| 1522 tok.skipeol(); | |
| 1523 } | |
| 1524 } | |
| 1525 else { | |
| 1526 // may be a valid email address or domain name | |
| 1527 char *st = tok.next(); | |
|
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1528 if ((st == token_white) || (st == token_black) || (st == token_unknown) || (st == token_inherit)) { |
| 94 | 1529 me.add_from(have, st); |
| 1530 } | |
| 1531 else { | |
| 1532 CONTEXTP con = me.find_from_context_name(st); | |
| 1533 if (con) { | |
| 1534 me.add_from_context(have, con); | |
| 1535 } | |
| 1536 else { | |
|
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1537 tok.token_error("white/black/unknown/inherit or child context name", st); |
| 94 | 1538 return false; |
| 1539 } | |
| 1540 } | |
| 1541 } | |
| 1542 } | |
| 1543 return tsa(tok, token_semi); | |
| 1544 } | |
| 1545 | |
| 1546 | |
| 1547 //////////////////////////////////////////////// | |
| 1548 // | |
| 136 | 1549 bool parse_rate(TOKEN &tok, CONFIG &dc, CONTEXT &me); |
| 1550 bool parse_rate(TOKEN &tok, CONFIG &dc, CONTEXT &me) { | |
| 140 | 1551 char *def = tok.next(); |
| 141 | 1552 tok.push(def); |
| 1553 if (def != token_lbrace) me.set_default_rate(tok.nextint()); | |
| 136 | 1554 if (!tsa(tok, token_lbrace)) return false; |
| 1555 while (true) { | |
| 1556 char *have = tok.next(); | |
| 1557 if (!have) break; | |
| 1558 if (have == token_rbrace) break; | |
| 1559 if (have == token_semi) { | |
| 1560 // optional separators | |
| 1561 } | |
| 1562 else { | |
| 140 | 1563 me.add_rate(have, tok.nextint()); |
| 136 | 1564 } |
| 1565 } | |
| 1566 return tsa(tok, token_semi); | |
| 1567 } | |
| 1568 | |
| 1569 | |
| 1570 //////////////////////////////////////////////// | |
| 1571 // | |
| 94 | 1572 bool parse_context(TOKEN &tok, CONFIG &dc, CONTEXTP parent); |
| 1573 bool parse_context(TOKEN &tok, CONFIG &dc, CONTEXTP parent) { | |
| 1574 char *name = tok.next(); | |
| 1575 if (!tsa(tok, token_lbrace)) return false; | |
| 1576 CONTEXTP con = new CONTEXT(parent, name); | |
| 1577 | |
| 1578 while (true) { | |
| 1579 char *have = tok.next(); | |
| 1580 if (!have) break; | |
| 1581 if (have == token_rbrace) break; // done | |
| 1582 if (have == token_dnsbl) { | |
| 1583 if (!parse_dnsbl(tok, dc, *con)) return false; | |
| 1584 } | |
| 1585 else if (have == token_dnsbll) { | |
| 1586 if (!parse_dnsbll(tok, dc, *con)) return false; | |
| 1587 } | |
| 1588 else if (have == token_content) { | |
| 1589 if (!parse_content(tok, dc, *con)) return false; | |
| 1590 } | |
| 1591 else if (have == token_envto) { | |
| 1592 if (!parse_envto(tok, dc, *con)) return false; | |
| 1593 } | |
| 1594 else if (have == token_verify) { | |
| 1595 if (!parse_verify(tok, dc, *con)) return false; | |
| 1596 } | |
| 168 | 1597 else if (have == token_generic) { |
| 1598 if (!parse_generic(tok, dc, *con)) return false; | |
| 1599 } | |
| 153 | 1600 else if (have == token_autowhite) { |
| 1601 if (!parse_autowhite(tok, dc, *con)) return false; | |
| 1602 } | |
| 94 | 1603 else if (have == token_envfrom) { |
| 1604 if (!parse_envfrom(tok, dc, *con)) return false; | |
| 1605 } | |
| 140 | 1606 else if (have == token_rate) { |
| 1607 if (parent || dc.default_context) tok.token_error("rate limit ignored in non default context"); | |
| 136 | 1608 if (!parse_rate(tok, dc, *con)) return false; |
| 1609 } | |
| 94 | 1610 else if (have == token_context) { |
| 1611 if (!parse_context(tok, dc, con)) return false; | |
| 1612 } | |
| 1613 else { | |
| 1614 tok.token_error("context keyword", have); | |
| 1615 return false; | |
| 1616 } | |
| 1617 } | |
| 1618 | |
| 1619 if (!tsa(tok, token_semi)) { | |
| 1620 delete con; | |
| 1621 return false; | |
| 1622 } | |
| 1623 dc.add_context(con); | |
| 1624 if (parent) parent->add_context(con); | |
| 1625 return true; | |
| 1626 } | |
| 1627 | |
| 1628 | |
| 1629 //////////////////////////////////////////////// | |
| 1630 // parse a config file | |
| 1631 // | |
| 1632 bool load_conf(CONFIG &dc, char *fn) { | |
| 99 | 1633 int count = 0; |
| 94 | 1634 TOKEN tok(fn, &dc.config_files); |
| 1635 while (true) { | |
| 1636 char *have = tok.next(); | |
| 1637 if (!have) break; | |
| 1638 if (have == token_context) { | |
| 1639 if (!parse_context(tok, dc, NULL)) { | |
| 99 | 1640 tok.token_error("load_conf() failed to parse context"); |
| 94 | 1641 return false; |
| 1642 } | |
| 99 | 1643 else count++; |
| 94 | 1644 } |
| 1645 else { | |
| 1646 tok.token_error(token_context, have); | |
| 1647 return false; | |
| 1648 } | |
| 1649 } | |
| 99 | 1650 tok.token_error("load_conf() found %d contexts in %s", count, fn); |
| 94 | 1651 return (dc.default_context) ? true : false; |
| 1652 } | |
| 1653 | |
| 1654 | |
| 1655 //////////////////////////////////////////////// | |
| 1656 // init the tokens | |
| 1657 // | |
| 1658 void token_init() { | |
| 178 | 1659 token_autowhite = register_string("autowhite"); |
| 1660 token_black = register_string("black"); | |
| 1661 token_cctld = register_string("cctld"); | |
| 1662 token_content = register_string("content"); | |
| 1663 token_context = register_string("context"); | |
| 1664 token_dccbulk = register_string("dcc_bulk_threshold"); | |
| 1665 token_dccfrom = register_string("dcc_from"); | |
| 1666 token_dccgrey = register_string("dcc_greylist"); | |
| 1667 token_dccto = register_string("dcc_to"); | |
| 1668 token_default = register_string("default"); | |
| 1669 token_dnsbl = register_string("dnsbl"); | |
| 1670 token_dnsbll = register_string("dnsbl_list"); | |
| 1671 token_envfrom = register_string("env_from"); | |
| 1672 token_envto = register_string("env_to"); | |
| 1673 token_filter = register_string("filter"); | |
| 1674 token_generic = register_string("generic"); | |
| 1675 token_host_limit = register_string("host_limit"); | |
| 1676 token_html_limit = register_string("html_limit"); | |
| 1677 token_html_tags = register_string("html_tags"); | |
| 1678 token_ignore = register_string("ignore"); | |
| 1679 token_include = register_string("include"); | |
| 1680 token_inherit = register_string("inherit"); | |
| 1681 token_lbrace = register_string("{"); | |
| 1682 token_mailhost = register_string("mail_host"); | |
| 1683 token_many = register_string("many"); | |
| 1684 token_no = register_string("no"); | |
| 1685 token_off = register_string("off"); | |
| 1686 token_ok = register_string("ok"); | |
| 1687 token_ok2 = register_string("ok2"); | |
| 1688 token_on = register_string("on"); | |
| 1689 token_rate = register_string("rate_limit"); | |
| 1690 token_rbrace = register_string("}"); | |
| 1691 token_require = register_string("require_match"); | |
| 1692 token_semi = register_string(";"); | |
| 1693 token_soft = register_string("soft"); | |
| 1694 token_spamassassin = register_string("spamassassin"); | |
| 1695 token_substitute = register_string("substitute"); | |
| 1696 token_tld = register_string("tld"); | |
| 1697 token_unknown = register_string("unknown"); | |
| 1698 token_uribl = register_string("uribl"); | |
| 1699 token_verify = register_string("verify"); | |
| 1700 token_white = register_string("white"); | |
| 1701 token_yes = register_string("yes"); | |
| 94 | 1702 |
| 1703 if (gethostname(myhostname, HOST_NAME_MAX+1) != 0) { | |
| 1704 strncpy(myhostname, "localhost", HOST_NAME_MAX+1); | |
| 1705 } | |
| 1706 myhostname[HOST_NAME_MAX] = '\0'; // ensure null termination | |
| 1707 token_myhostname = register_string(myhostname); | |
| 1708 } |