| 1 | /* |
| 2 | webalizer - a web server log analysis program |
| 3 | |
| 4 | Copyright (C) 1997-2011 Bradford L. Barrett |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version, and provided that the above |
| 10 | copyright and permission notice is included with all distributed |
| 11 | copies of this or derived software. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| 21 | |
| 22 | */ |
| 23 | |
| 24 | /*********************************************/ |
| 25 | /* STANDARD INCLUDES */ |
| 26 | /*********************************************/ |
| 27 | |
| 28 | #include <time.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | #include <errno.h> |
| 33 | #include <unistd.h> /* normal stuff */ |
| 34 | #include <ctype.h> |
| 35 | #include <sys/utsname.h> |
| 36 | #include <zlib.h> |
| 37 | |
| 38 | /* ensure sys/types */ |
| 39 | #ifndef _SYS_TYPES_H |
| 40 | #include <sys/types.h> |
| 41 | #endif |
| 42 | |
| 43 | /* Need socket header? */ |
| 44 | #ifdef HAVE_SYS_SOCKET_H |
| 45 | #include <sys/socket.h> |
| 46 | #endif |
| 47 | |
| 48 | /* some systems need this */ |
| 49 | #ifdef HAVE_MATH_H |
| 50 | #include <math.h> |
| 51 | #endif |
| 52 | |
| 53 | #ifdef USE_DNS /* skip everything in this file if no DNS */ |
| 54 | |
| 55 | #include <netinet/in.h> /* include stuff we need for dns lookups, */ |
| 56 | #include <arpa/inet.h> /* DB access, file control, etc... */ |
| 57 | #include <fcntl.h> |
| 58 | #include <netdb.h> /* ensure getaddrinfo/getnameinfo */ |
| 59 | #include <signal.h> |
| 60 | #include <sys/signal.h> |
| 61 | #include <sys/stat.h> |
| 62 | #include <sys/time.h> |
| 63 | #include <sys/wait.h> |
| 64 | #include <db.h> /* DB header ****************/ |
| 65 | #include "webalizer.h" /* main header */ |
| 66 | #include "lang.h" /* language declares */ |
| 67 | #include "hashtab.h" /* hash table functions */ |
| 68 | #include "parser.h" /* log parser functions */ |
| 69 | #include "dns_resolv.h" /* our header */ |
| 70 | |
| 71 | /* local data */ |
| 72 | |
| 73 | DB *dns_db = NULL; /* DNS cache database */ |
| 74 | int dns_fd = 0; |
| 75 | |
| 76 | DB *geo_db = NULL; /* GeoDB database */ |
| 77 | DBC *geo_dbc = NULL; /* GeoDB database cursor */ |
| 78 | |
| 79 | struct dns_child child[MAXCHILD]; /* DNS child pipe data */ |
| 80 | |
| 81 | DNODEPTR host_table[MAXHASH]; /* hostname/ip hash table */ |
| 82 | |
| 83 | char buffer[BUFSIZE]; /* log file record buffer */ |
| 84 | char tmp_buf[BUFSIZE]; /* used to temp save above */ |
| 85 | struct utsname system_info; /* system info structure */ |
| 86 | |
| 87 | int raiseSigChild = 1; |
| 88 | |
| 89 | time_t runtime; |
| 90 | time_t start_time, end_time; |
| 91 | float temp_time; |
| 92 | |
| 93 | extern char *our_gzgets(void *, char *, int); /* external our_gzgets func */ |
| 94 | |
| 95 | /* internal function prototypes */ |
| 96 | |
| 97 | static void process_list(DNODEPTR); |
| 98 | static void sigChild(int); |
| 99 | static void db_put(char *, char *, int); |
| 100 | void set_fl(int, int); |
| 101 | void clr_fl(int, int); |
| 102 | int iptype(char *, unsigned char *); |
| 103 | |
| 104 | /*********************************************/ |
| 105 | /* RESOLVE_DNS - lookup IP in cache */ |
| 106 | /*********************************************/ |
| 107 | |
| 108 | void resolve_dns(struct log_struct *log_rec) |
| 109 | { |
| 110 | DBT query, response; |
| 111 | int i; |
| 112 | /* aligned dnsRecord to prevent Solaris from doing a dump */ |
| 113 | /* (not found in debugger, as it can dereference it :( */ |
| 114 | struct dnsRecord alignedRecord; |
| 115 | |
| 116 | if (!dns_db) return; /* ensure we have a dns db */ |
| 117 | |
| 118 | memset(&query, 0, sizeof(query)); |
| 119 | memset(&response, 0, sizeof(response)); |
| 120 | query.data = log_rec->hostname; |
| 121 | query.size = strlen(log_rec->hostname); |
| 122 | |
| 123 | if (debug_mode) fprintf(stderr,"Checking %s...", log_rec->hostname); |
| 124 | |
| 125 | if ( (i=dns_db->get(dns_db, NULL, &query, &response, 0)) == 0) |
| 126 | { |
| 127 | memcpy(&alignedRecord, response.data, sizeof(struct dnsRecord)); |
| 128 | strncpy (log_rec->hostname, |
| 129 | ((struct dnsRecord *)response.data)->hostName, |
| 130 | MAXHOST); |
| 131 | log_rec->hostname[MAXHOST-1]=0; |
| 132 | if (debug_mode) |
| 133 | fprintf(stderr," found: %s (%ld)\n", |
| 134 | log_rec->hostname, alignedRecord.timeStamp); |
| 135 | } |
| 136 | else /* not found or error occured during get */ |
| 137 | { |
| 138 | if (debug_mode) |
| 139 | { |
| 140 | if (i==DB_NOTFOUND) fprintf(stderr," not found\n"); |
| 141 | else fprintf(stderr," error (%d)\n",i); |
| 142 | } |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | /*********************************************/ |
| 147 | /* DNS_RESOLVER - read log and lookup IP's */ |
| 148 | /*********************************************/ |
| 149 | |
| 150 | int dns_resolver(void *log_fp) |
| 151 | { |
| 152 | DNODEPTR h_entries; |
| 153 | DNODEPTR l_list = NULL; |
| 154 | |
| 155 | int i; |
| 156 | int save_verbose=verbose; |
| 157 | |
| 158 | u_int64_t listEntries = 0; |
| 159 | |
| 160 | struct sigaction sigPipeAction; |
| 161 | struct stat dbStat; |
| 162 | /* aligned dnsRecord to prevent Solaris from doing a dump */ |
| 163 | /* (not found in debugger, as it can dereference it :( */ |
| 164 | struct dnsRecord alignedRecord; |
| 165 | |
| 166 | struct flock tmp_flock; |
| 167 | |
| 168 | tmp_flock.l_whence=SEEK_SET; /* default flock fields */ |
| 169 | tmp_flock.l_start=0; |
| 170 | tmp_flock.l_len=0; |
| 171 | tmp_flock.l_pid=0; |
| 172 | |
| 173 | time(&runtime); |
| 174 | |
| 175 | /* get processing start time */ |
| 176 | start_time = time(NULL); |
| 177 | |
| 178 | /* minimal sanity check on it */ |
| 179 | if(stat(dns_cache, &dbStat) < 0) |
| 180 | { |
| 181 | if(errno != ENOENT) |
| 182 | { |
| 183 | dns_cache=NULL; |
| 184 | dns_db=NULL; return 0; /* disable cache */ |
| 185 | } |
| 186 | } |
| 187 | else |
| 188 | { |
| 189 | if(!dbStat.st_size) /* bogus file, probably from a crash */ |
| 190 | { |
| 191 | unlink(dns_cache); /* remove it so we can recreate... */ |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | /* open cache file */ |
| 196 | if ( (db_create(&dns_db, NULL, 0) != 0) || |
| 197 | (dns_db->open(dns_db, NULL, |
| 198 | dns_cache, NULL, DB_HASH, |
| 199 | DB_CREATE, 0644) != 0) ) |
| 200 | { |
| 201 | /* Error: Unable to open DNS cache file <filename> */ |
| 202 | if (verbose) fprintf(stderr,"%s %s\n",msg_dns_nodb,dns_cache); |
| 203 | dns_cache=NULL; |
| 204 | dns_db=NULL; |
| 205 | return 0; /* disable cache */ |
| 206 | } |
| 207 | |
| 208 | /* get file descriptor */ |
| 209 | dns_db->fd(dns_db, &dns_fd); |
| 210 | |
| 211 | tmp_flock.l_type=F_WRLCK; /* set read/write lock type */ |
| 212 | if (fcntl(dns_fd,F_SETLK,&tmp_flock) < 0) /* and barf if we cant lock */ |
| 213 | { |
| 214 | /* Error: Unable to lock DNS cache file <filename> */ |
| 215 | if (verbose) fprintf(stderr,"%s %s\n",msg_dns_nolk,dns_cache); |
| 216 | dns_db->close(dns_db, 0); |
| 217 | dns_cache=NULL; |
| 218 | dns_db=NULL; |
| 219 | return 0; /* disable cache */ |
| 220 | } |
| 221 | |
| 222 | /* Setup signal handlers */ |
| 223 | sigPipeAction.sa_handler = SIG_IGN; |
| 224 | sigPipeAction.sa_flags = SA_RESTART; |
| 225 | sigemptyset(&sigPipeAction.sa_mask); |
| 226 | |
| 227 | sigaction(SIGPIPE, &sigPipeAction, NULL); |
| 228 | |
| 229 | /* disable warnings/errors for this run... */ |
| 230 | verbose=0; |
| 231 | |
| 232 | /* Main loop to read log records (either regular or zipped) */ |
| 233 | while ( (gz_log)?(our_gzgets((void *)log_fp,buffer,BUFSIZE) != Z_NULL): |
| 234 | (fgets(buffer,BUFSIZE,log_fname?(FILE *)log_fp:stdin) != NULL)) |
| 235 | { |
| 236 | if (strlen(buffer) == (BUFSIZE-1)) |
| 237 | { |
| 238 | /* get the rest of the record */ |
| 239 | while ( (gz_log)?(our_gzgets((void *)log_fp,buffer,BUFSIZE)!=Z_NULL): |
| 240 | (fgets(buffer,BUFSIZE,log_fname?(FILE *)log_fp:stdin)!=NULL)) |
| 241 | { |
| 242 | if (strlen(buffer) < BUFSIZE-1) break; |
| 243 | } |
| 244 | continue; /* go get next record if any */ |
| 245 | } |
| 246 | |
| 247 | strcpy(tmp_buf, buffer); /* save buffer in case of error */ |
| 248 | if(parse_record(buffer)) /* parse the record */ |
| 249 | { |
| 250 | struct addrinfo hints, *ares; |
| 251 | memset(&hints, 0, sizeof(hints)); |
| 252 | hints.ai_family = AF_UNSPEC; |
| 253 | hints.ai_socktype = SOCK_STREAM; |
| 254 | hints.ai_flags = AI_NUMERICHOST; |
| 255 | if (0 == getaddrinfo(log_rec.hostname, "0", &hints, &ares)) |
| 256 | { |
| 257 | DBT q, r; |
| 258 | memset(&q, 0, sizeof(q)); |
| 259 | memset(&r, 0, sizeof(r)); |
| 260 | q.data = log_rec.hostname; |
| 261 | q.size = strlen(log_rec.hostname); |
| 262 | |
| 263 | /* Check if we have it in DB */ |
| 264 | if ( (i=dns_db->get(dns_db, NULL, &q, &r, 0)) == 0 ) |
| 265 | { |
| 266 | /* have a record for this address */ |
| 267 | memcpy(&alignedRecord, r.data, sizeof(struct dnsRecord)); |
| 268 | if (alignedRecord.timeStamp != 0) |
| 269 | /* If it's not permanent, check if it's TTL has expired */ |
| 270 | if ( (runtime-alignedRecord.timeStamp ) > (86400*cache_ttl) ) |
| 271 | put_dnode(log_rec.hostname, ares->ai_addr, |
| 272 | ares->ai_addrlen, host_table); |
| 273 | } |
| 274 | else |
| 275 | { |
| 276 | if (i==DB_NOTFOUND) |
| 277 | put_dnode(log_rec.hostname, ares->ai_addr, |
| 278 | ares->ai_addrlen, host_table); |
| 279 | } |
| 280 | freeaddrinfo(ares); |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | verbose = save_verbose; /* restore verbosity level... */ |
| 285 | |
| 286 | listEntries = 0; |
| 287 | |
| 288 | /* build our linked list l_list */ |
| 289 | for(i=0;i < MAXHASH; i++) |
| 290 | { |
| 291 | for(h_entries=host_table[i]; h_entries ; h_entries = h_entries->next) |
| 292 | { |
| 293 | h_entries->llist = l_list; |
| 294 | l_list = h_entries; |
| 295 | listEntries++; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | if(!l_list) |
| 300 | { |
| 301 | /* No valid addresses found... */ |
| 302 | if (verbose>1) printf("%s\n",msg_dns_none); |
| 303 | tmp_flock.l_type=F_UNLCK; |
| 304 | fcntl(dns_fd, F_SETLK, &tmp_flock); |
| 305 | dns_db->close(dns_db, 0); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | /* process our list now... */ |
| 310 | process_list(l_list); |
| 311 | |
| 312 | /* get processing end time */ |
| 313 | end_time = time(NULL); |
| 314 | |
| 315 | /* display DNS processing statistics */ |
| 316 | if (time_me || (verbose>1)) |
| 317 | { |
| 318 | if (verbose<2 && time_me) printf("DNS: "); |
| 319 | printf("%llu %s ",listEntries, msg_addresses); |
| 320 | |
| 321 | /* total processing time in seconds */ |
| 322 | temp_time = difftime(end_time,start_time); |
| 323 | if (temp_time==0) temp_time=1; |
| 324 | printf("%s %.0f %s", msg_in, temp_time, msg_seconds); |
| 325 | |
| 326 | /* calculate records per second */ |
| 327 | if (temp_time) |
| 328 | i=( (int)((float)listEntries/temp_time) ); |
| 329 | else i=0; |
| 330 | |
| 331 | if ( (i>0) && (i<=listEntries) ) printf(", %d/sec\n", i); |
| 332 | else printf("\n"); |
| 333 | } |
| 334 | |
| 335 | /* processing done, exit */ |
| 336 | tmp_flock.l_type=F_UNLCK; |
| 337 | fcntl(dns_fd, F_SETLK, &tmp_flock); |
| 338 | dns_db->close(dns_db, 0); |
| 339 | return 0; |
| 340 | |
| 341 | } |
| 342 | |
| 343 | /*********************************************/ |
| 344 | /* PROCESS_LIST - do the resoluton... */ |
| 345 | /*********************************************/ |
| 346 | |
| 347 | static void process_list(DNODEPTR l_list) |
| 348 | { |
| 349 | DNODEPTR trav; |
| 350 | |
| 351 | char child_buf[MAXHOST+3-((unsigned long)&trav+sizeof(trav))%3]; |
| 352 | char dns_buf[MAXHOST]; |
| 353 | int i; |
| 354 | int pid; |
| 355 | int nof_children = 0; |
| 356 | fd_set rd_set; |
| 357 | char hbuf[NI_MAXHOST]; |
| 358 | |
| 359 | struct sigaction sigChildAction; |
| 360 | |
| 361 | sigChildAction.sa_handler = sigChild; |
| 362 | sigChildAction.sa_flags = SA_NOCLDSTOP|SA_RESTART; |
| 363 | sigemptyset(&sigChildAction.sa_mask); |
| 364 | |
| 365 | raiseSigChild = 0; |
| 366 | |
| 367 | sigaction(SIGCHLD, &sigChildAction, NULL); |
| 368 | |
| 369 | /* fire up our child processes */ |
| 370 | for(i=0; i < dns_children; i++) |
| 371 | { |
| 372 | if(pipe(child[i].inpipe)) |
| 373 | { |
| 374 | if (verbose) fprintf(stderr,"INPIPE creation error"); |
| 375 | return; /* exit(1) */ |
| 376 | } |
| 377 | |
| 378 | if(pipe(child[i].outpipe)) |
| 379 | { |
| 380 | if (verbose) fprintf(stderr,"OUTPIPE creation error"); |
| 381 | return; /* exit(1); */ |
| 382 | } |
| 383 | |
| 384 | /* fork it off */ |
| 385 | switch(pid=fork()) |
| 386 | { |
| 387 | case -1: |
| 388 | { |
| 389 | if (verbose) fprintf(stderr,"FORK error"); |
| 390 | return; /* exit(1); */ |
| 391 | } |
| 392 | |
| 393 | case 0: /* Child */ |
| 394 | { |
| 395 | int size; |
| 396 | |
| 397 | close(child[i].inpipe[0]); |
| 398 | close(child[i].outpipe[1]); |
| 399 | |
| 400 | /* get struct sockaddr_storage here */ |
| 401 | while((size = read(child[i].outpipe[0], child_buf, MAXHOST))) |
| 402 | { |
| 403 | if(size < 0) |
| 404 | { |
| 405 | perror("read error"); |
| 406 | exit(1); |
| 407 | } |
| 408 | else |
| 409 | { |
| 410 | /* Clear out our buffer */ |
| 411 | memset(hbuf,0,NI_MAXHOST); |
| 412 | |
| 413 | if(0 == getnameinfo((struct sockaddr*)child_buf, size, |
| 414 | hbuf, sizeof(hbuf), NULL, 0, NI_NAMEREQD)) |
| 415 | { |
| 416 | /* must be at least 4 chars */ |
| 417 | if (strlen(hbuf)>3) |
| 418 | { |
| 419 | /* If long hostname, take max domain name part */ |
| 420 | if ((size = strlen(hbuf)) > MAXHOST-2) |
| 421 | strcpy(child_buf,(hbuf+(size-MAXHOST+1))); |
| 422 | else strcpy(child_buf, hbuf); |
| 423 | size = strlen(child_buf); |
| 424 | } |
| 425 | else |
| 426 | { |
| 427 | if (debug_mode) |
| 428 | printf("Child %d getnameinfo bad hbuf!\n",i); |
| 429 | } |
| 430 | } |
| 431 | else |
| 432 | { |
| 433 | if(debug_mode) |
| 434 | printf("Child %d getnameinfo failed!\n",i); |
| 435 | } |
| 436 | |
| 437 | if (write(child[i].inpipe[1], child_buf, size) == -1) |
| 438 | { |
| 439 | perror("write error"); |
| 440 | exit(1); |
| 441 | } |
| 442 | } |
| 443 | } |
| 444 | close(child[i].inpipe[1]); |
| 445 | close(child[i].outpipe[0]); |
| 446 | |
| 447 | if(debug_mode) |
| 448 | printf( "Child %d got closed input, shutting down\n", i); |
| 449 | |
| 450 | fflush(stdout); |
| 451 | exit(0); |
| 452 | } /* case 0 */ |
| 453 | |
| 454 | default: |
| 455 | { |
| 456 | child[i].pid = pid; |
| 457 | child[i].flags = DNS_CHILD_READY|DNS_CHILD_RUNNING; |
| 458 | nof_children++; |
| 459 | close(child[i].inpipe[1]); |
| 460 | close(child[i].outpipe[0]); |
| 461 | |
| 462 | set_fl(child[i].inpipe[0], O_NONBLOCK); |
| 463 | } |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | trav = l_list; |
| 468 | |
| 469 | while(nof_children) |
| 470 | { |
| 471 | static struct timeval selectTimeval; |
| 472 | int res; |
| 473 | int max_fd; |
| 474 | |
| 475 | FD_ZERO(&rd_set); |
| 476 | max_fd = 0; |
| 477 | |
| 478 | if(raiseSigChild) |
| 479 | { |
| 480 | int pid; |
| 481 | |
| 482 | while((pid = waitpid(-1, NULL, WNOHANG)) > 0) |
| 483 | { |
| 484 | for(i=0;i<dns_children;i++) |
| 485 | { |
| 486 | if(child[i].pid == pid) |
| 487 | { |
| 488 | child[i].pid = 0; |
| 489 | child[i].flags &= ~(DNS_CHILD_READY|DNS_CHILD_RUNNING); |
| 490 | nof_children--; |
| 491 | |
| 492 | if(debug_mode) |
| 493 | printf("Reaped Child %d\n", pid); |
| 494 | |
| 495 | break; |
| 496 | } |
| 497 | } |
| 498 | } |
| 499 | raiseSigChild--; |
| 500 | continue; /* while, nof children has just changed */ |
| 501 | } |
| 502 | |
| 503 | for(i=0;i<dns_children;i++) |
| 504 | { |
| 505 | if(child[i].flags & DNS_CHILD_RUNNING) /* Child is running */ |
| 506 | { |
| 507 | if(child[i].flags & DNS_CHILD_READY) |
| 508 | { |
| 509 | child[i].flags &= ~DNS_CHILD_READY; |
| 510 | |
| 511 | if(trav) /* something to resolve */ |
| 512 | { |
| 513 | if (write(child[i].outpipe[1], &trav->addr, |
| 514 | trav->addrlen) != -1) |
| 515 | { |
| 516 | /* We will watch this child */ |
| 517 | child[i].cur = trav; |
| 518 | FD_SET(child[i].inpipe[0], &rd_set); |
| 519 | max_fd = MAX(max_fd, child[i].inpipe[0]); |
| 520 | |
| 521 | if(debug_mode) |
| 522 | printf("Giving %d bytes to Child %d\n", |
| 523 | trav->addrlen, i); |
| 524 | |
| 525 | trav = trav->llist; |
| 526 | } |
| 527 | else /* write error */ |
| 528 | { |
| 529 | if(errno != EINTR) /* Could be a signal */ |
| 530 | { |
| 531 | perror("Could not write to pipe"); |
| 532 | close(child[i].outpipe[1]); /* kill */ |
| 533 | child[i].flags &= ~DNS_CHILD_RUNNING; /* child */ |
| 534 | } |
| 535 | } |
| 536 | } |
| 537 | else /* List is complete */ |
| 538 | { |
| 539 | close(child[i].outpipe[1]); /* Go away */ |
| 540 | child[i].flags &= ~DNS_CHILD_RUNNING; /* Child is dead */ |
| 541 | } |
| 542 | } |
| 543 | else |
| 544 | { |
| 545 | /* Look, the busy child... */ |
| 546 | FD_SET(child[i].inpipe[0], &rd_set); |
| 547 | max_fd = MAX(max_fd, child[i].inpipe[0]); |
| 548 | } |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | selectTimeval.tv_sec = 5; /* This stuff ticks in 5 second intervals */ |
| 553 | selectTimeval.tv_usec = 0; |
| 554 | |
| 555 | switch(res = select(max_fd+1, &rd_set, NULL, NULL, &selectTimeval)) |
| 556 | { |
| 557 | case -1: |
| 558 | { |
| 559 | if(errno != EINTR) /* Could be a signal */ |
| 560 | perror("Error in select"); |
| 561 | |
| 562 | break; |
| 563 | } |
| 564 | |
| 565 | case 0: /* Timeout, just fall once through the child loop */ |
| 566 | { |
| 567 | if(debug_mode) |
| 568 | printf("tick\n"); |
| 569 | |
| 570 | break; |
| 571 | } |
| 572 | |
| 573 | default: |
| 574 | { |
| 575 | for(i=0; i< dns_children;i++) |
| 576 | { |
| 577 | if(!res) /* All file descriptors done */ |
| 578 | break; |
| 579 | |
| 580 | if(FD_ISSET(child[i].inpipe[0], &rd_set)) |
| 581 | { |
| 582 | int size; |
| 583 | |
| 584 | res--; /* One less... */ |
| 585 | |
| 586 | switch (size=read(child[i].inpipe[0], dns_buf, MAXHOST)) |
| 587 | { |
| 588 | case -1: |
| 589 | { |
| 590 | if(errno != EINTR) |
| 591 | perror("Could not read from pipe"); |
| 592 | break; |
| 593 | } |
| 594 | case 0: |
| 595 | { |
| 596 | /* EOF. Child has closed Pipe. It shouldn't have */ |
| 597 | /* done that, could be an error or something. */ |
| 598 | /* Reap it */ |
| 599 | close(child[i].outpipe[1]); |
| 600 | child[i].flags &= ~DNS_CHILD_RUNNING; |
| 601 | |
| 602 | if(debug_mode) |
| 603 | printf("Child %d wants to be reaped\n", i); |
| 604 | |
| 605 | break; |
| 606 | } |
| 607 | |
| 608 | default: |
| 609 | { |
| 610 | dns_buf[size] = '\0'; |
| 611 | if( strlen(dns_buf) > 1 && |
| 612 | memcmp(dns_buf, &(child[i].cur->addr), |
| 613 | sizeof(child[i].cur->addr))) |
| 614 | { |
| 615 | if(debug_mode) |
| 616 | printf("Child %d Got a result: %s -> %s\n", |
| 617 | i, child[i].cur->string, dns_buf); |
| 618 | db_put(child[i].cur->string, dns_buf, 0); |
| 619 | } |
| 620 | else |
| 621 | { |
| 622 | if(debug_mode) |
| 623 | printf("Child %d could not resolve: %s (%s)\n", |
| 624 | i, child[i].cur->string, |
| 625 | (cache_ips)?"cache":"no cache"); |
| 626 | if (cache_ips) /* Cache non-resolved? */ |
| 627 | db_put(child[i].cur->string, |
| 628 | child[i].cur->string,1); |
| 629 | } |
| 630 | |
| 631 | if(debug_mode) |
| 632 | printf("Child %d back in task pool\n", i); |
| 633 | |
| 634 | /* Child is back in the task pool */ |
| 635 | child[i].flags |= DNS_CHILD_READY; |
| 636 | break; |
| 637 | } |
| 638 | } |
| 639 | } |
| 640 | } |
| 641 | break; |
| 642 | } |
| 643 | } |
| 644 | } |
| 645 | return; |
| 646 | } |
| 647 | |
| 648 | /*********************************************/ |
| 649 | /* SET_FL - set flag on pipe FD */ |
| 650 | /*********************************************/ |
| 651 | |
| 652 | void set_fl(int fd, int flags) |
| 653 | { |
| 654 | int val; |
| 655 | |
| 656 | /* get current flags */ |
| 657 | if ((val=fcntl(fd, F_GETFL, 0)) < 0) |
| 658 | if (verbose) fprintf(stderr,"set_fl F_GETFL error\n"); |
| 659 | |
| 660 | /* set them */ |
| 661 | val |= flags; |
| 662 | |
| 663 | /* and write them back */ |
| 664 | if ((val=fcntl(fd, F_SETFL, val)) < 0) |
| 665 | if (verbose) fprintf(stderr,"set_fl F_SETFL error\n"); |
| 666 | } |
| 667 | |
| 668 | /*********************************************/ |
| 669 | /* CLR_FL - clear flag on pipe FD */ |
| 670 | /*********************************************/ |
| 671 | |
| 672 | void clr_fl(int fd, int flags) |
| 673 | { |
| 674 | int val; |
| 675 | |
| 676 | /* Get current flags */ |
| 677 | if ((val=fcntl(fd, F_GETFL, 0)) < 0) |
| 678 | if (verbose) fprintf(stderr,"clr_fl F_GETFL error\n"); |
| 679 | |
| 680 | /* set them */ |
| 681 | val &= ~flags; |
| 682 | |
| 683 | /* and write them back */ |
| 684 | if ((val=fcntl(fd, F_SETFL, val)) < 0) |
| 685 | if (verbose) fprintf(stderr,"clr_fl F_SETFL error\n"); |
| 686 | } |
| 687 | |
| 688 | /*********************************************/ |
| 689 | /* DB_PUT - put key/val in the cache db */ |
| 690 | /*********************************************/ |
| 691 | |
| 692 | static void db_put(char *key, char *value, int numeric) |
| 693 | { |
| 694 | DBT k, v; |
| 695 | char *cp; |
| 696 | struct dnsRecord *recPtr = NULL; |
| 697 | int nameLen = strlen(value)+1; |
| 698 | |
| 699 | /* Align to multiple of eight bytes */ |
| 700 | int recSize = (sizeof(struct dnsRecord)+nameLen+7) & ~0x7; |
| 701 | |
| 702 | /* make sure we have a db ;) */ |
| 703 | if(dns_db) |
| 704 | { |
| 705 | if((recPtr = calloc(1, recSize))) |
| 706 | { |
| 707 | recPtr->timeStamp = runtime; |
| 708 | recPtr->numeric = numeric; |
| 709 | memcpy(&recPtr->hostName, value, nameLen); |
| 710 | memset(&k, 0, sizeof(k)); |
| 711 | memset(&v, 0, sizeof(v)); |
| 712 | |
| 713 | /* Ensure all data is lowercase */ |
| 714 | cp=key; while (*cp++!='\0') *cp=tolower(*cp); |
| 715 | cp=value; while (*cp++!='\0') *cp=tolower(*cp); |
| 716 | |
| 717 | k.data = key; |
| 718 | k.size = strlen(key); |
| 719 | |
| 720 | v.size = recSize; |
| 721 | v.data = recPtr; |
| 722 | |
| 723 | if ( dns_db->put(dns_db, NULL, &k, &v, 0) != 0 ) |
| 724 | if (verbose>1) fprintf(stderr,"db_put fail!\n"); |
| 725 | free(recPtr); |
| 726 | } |
| 727 | } |
| 728 | } |
| 729 | |
| 730 | /*********************************************/ |
| 731 | /* SIGCHILD - raise our signal */ |
| 732 | /*********************************************/ |
| 733 | |
| 734 | static void sigChild(int signum) |
| 735 | { |
| 736 | raiseSigChild++; |
| 737 | } |
| 738 | |
| 739 | /*********************************************/ |
| 740 | /* OPEN_CACHE - open our cache file RDONLY */ |
| 741 | /*********************************************/ |
| 742 | |
| 743 | int open_cache() |
| 744 | { |
| 745 | struct stat dbStat; |
| 746 | struct flock tmp_flock; |
| 747 | |
| 748 | tmp_flock.l_whence=SEEK_SET; /* default flock fields */ |
| 749 | tmp_flock.l_start=0; |
| 750 | tmp_flock.l_len=0; |
| 751 | tmp_flock.l_pid=0; |
| 752 | tmp_flock.l_type=F_RDLCK; |
| 753 | |
| 754 | /* double check filename was specified */ |
| 755 | if(!dns_cache) { dns_db=NULL; return 0; } |
| 756 | |
| 757 | /* minimal sanity check on it */ |
| 758 | if(stat(dns_cache, &dbStat) < 0) |
| 759 | { |
| 760 | if(errno != ENOENT) return 0; |
| 761 | } |
| 762 | else |
| 763 | { |
| 764 | if(!dbStat.st_size) /* bogus file, probably from a crash */ |
| 765 | { |
| 766 | unlink(dns_cache); /* remove it so we can recreate... */ |
| 767 | } |
| 768 | } |
| 769 | |
| 770 | /* open cache file */ |
| 771 | if ( (db_create(&dns_db, NULL, 0) != 0) || |
| 772 | (dns_db->open(dns_db, NULL, |
| 773 | dns_cache, NULL, DB_HASH, |
| 774 | DB_RDONLY, 0644) != 0) ) |
| 775 | { |
| 776 | /* Error: Unable to open DNS cache file <filename> */ |
| 777 | if (verbose) fprintf(stderr,"%s %s\n",msg_dns_nodb,dns_cache); |
| 778 | return 0; /* disable cache */ |
| 779 | } |
| 780 | |
| 781 | /* get file descriptor */ |
| 782 | dns_db->fd(dns_db, &dns_fd); |
| 783 | |
| 784 | /* Get shared lock on cache file */ |
| 785 | if (fcntl(dns_fd, F_SETLK, &tmp_flock) < 0) |
| 786 | { |
| 787 | if (verbose) fprintf(stderr,"%s %s\n",msg_dns_nolk,dns_cache); |
| 788 | dns_db->close(dns_db, 0); |
| 789 | return 0; |
| 790 | } |
| 791 | return 1; |
| 792 | } |
| 793 | |
| 794 | /*********************************************/ |
| 795 | /* CLOSE_CACHE - close our RDONLY cache */ |
| 796 | /*********************************************/ |
| 797 | |
| 798 | int close_cache() |
| 799 | { |
| 800 | struct flock tmp_flock; |
| 801 | |
| 802 | tmp_flock.l_whence=SEEK_SET; /* default flock fields */ |
| 803 | tmp_flock.l_start=0; |
| 804 | tmp_flock.l_len=0; |
| 805 | tmp_flock.l_pid=0; |
| 806 | tmp_flock.l_type=F_UNLCK; |
| 807 | |
| 808 | /* clear lock and close cache file */ |
| 809 | fcntl(dns_fd, F_SETLK, &tmp_flock); |
| 810 | dns_db->close(dns_db, 0); |
| 811 | return 1; |
| 812 | } |
| 813 | |
| 814 | /*********************************************/ |
| 815 | /* GEODB_OPEN - Open GeoDB database/cursor */ |
| 816 | /*********************************************/ |
| 817 | |
| 818 | DB *geodb_open(char *dbname) |
| 819 | { |
| 820 | char buf[1025]; |
| 821 | |
| 822 | if (dbname==NULL) |
| 823 | snprintf(buf,sizeof(buf),"%s/GeoDB.dat",GEODB_LOC); |
| 824 | else |
| 825 | strncpy(buf,dbname,sizeof(buf)-1); |
| 826 | buf[sizeof(buf)-1]='\0'; |
| 827 | |
| 828 | /* create database thingie */ |
| 829 | if ( db_create(&geo_db, NULL, 0) ) return NULL; |
| 830 | |
| 831 | /* open the database */ |
| 832 | if (geo_db->open(geo_db,NULL,buf,NULL,DB_BTREE,DB_RDONLY,0)) return NULL; |
| 833 | |
| 834 | /* create our cursor */ |
| 835 | if (geo_db->cursor(geo_db,NULL,&geo_dbc,0)) |
| 836 | { |
| 837 | geo_db->close(geo_db,0); |
| 838 | return NULL; |
| 839 | } |
| 840 | /* all is well in the world */ |
| 841 | return geo_db; |
| 842 | } |
| 843 | |
| 844 | /*********************************************/ |
| 845 | /* GEODB_VER - Get database version info */ |
| 846 | /*********************************************/ |
| 847 | |
| 848 | char *geodb_ver(DB *db, char *str) |
| 849 | { |
| 850 | int i; |
| 851 | DBT k,v; |
| 852 | unsigned char x[16]; |
| 853 | |
| 854 | memset(&x, 0, sizeof(x)); |
| 855 | memset(&k, 0, sizeof(k)); |
| 856 | memset(&v, 0, sizeof(v)); |
| 857 | k.data=&x; |
| 858 | k.size=sizeof(x); |
| 859 | |
| 860 | i=geo_db->get(geo_db, NULL, &k, &v, 0); |
| 861 | |
| 862 | if (i) strncpy(str, "Unknown", 8); |
| 863 | else strncpy(str, v.data+3, v.size-3); |
| 864 | return str; |
| 865 | } |
| 866 | |
| 867 | /*********************************************/ |
| 868 | /* GEODB_GET_CC - Get country code for IP */ |
| 869 | /*********************************************/ |
| 870 | |
| 871 | char *geodb_get_cc(DB *db, char *ip, char *buf) |
| 872 | { |
| 873 | int i; |
| 874 | DBT k,v; |
| 875 | unsigned char addr[16]; |
| 876 | |
| 877 | memset(addr, 0, sizeof(addr)); |
| 878 | strncpy(buf, "--", 3); |
| 879 | |
| 880 | /* get IP address */ |
| 881 | if (!iptype(ip, addr)) return buf; |
| 882 | |
| 883 | /* kludge for IPv6 mapped IPv4 */ |
| 884 | if (addr[0]==0 && addr[1]==0 && addr[2]==0) { addr[10]=0; addr[11]=0; } |
| 885 | |
| 886 | /* kludge for IPv6 6to4 (RFC3056) */ |
| 887 | if (addr[0]==0x20 && addr[1]==0x02) |
| 888 | { |
| 889 | memcpy(&addr[12],&addr[2],4); |
| 890 | memset(&addr,0,12); |
| 891 | } |
| 892 | |
| 893 | memset(&k, 0, sizeof(k)); |
| 894 | memset(&v, 0, sizeof(v)); |
| 895 | k.data=&addr; |
| 896 | k.size=sizeof(addr); |
| 897 | |
| 898 | i=geo_dbc->c_get(geo_dbc, &k, &v, DB_SET_RANGE); |
| 899 | if (!i) memcpy(buf, v.data, 2); |
| 900 | return buf; |
| 901 | } |
| 902 | |
| 903 | /*********************************************/ |
| 904 | /* GEODB_CLOSE - close GeoDB database */ |
| 905 | /*********************************************/ |
| 906 | |
| 907 | void geodb_close(DB *db) |
| 908 | { |
| 909 | db->close(db,0); |
| 910 | } |
| 911 | |
| 912 | /*********************************************/ |
| 913 | /* IPTYPE - get IP type and format addr buf */ |
| 914 | /*********************************************/ |
| 915 | |
| 916 | int iptype(char *ip, unsigned char *buf) |
| 917 | { |
| 918 | if (inet_pton(AF_INET6, ip, buf)>0) return 2; |
| 919 | if (inet_pton(AF_INET, ip, buf+12)>0) return 1; |
| 920 | else return 0; |
| 921 | } |
| 922 | |
| 923 | #endif /* USE_DNS */ |