1 /* 2 * Copyright (c) 1983, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1983, 1991, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)from: inetd.c 8.4 (Berkeley) 4/13/94"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 /* 49 * Inetd - Internet super-server 50 * 51 * This program invokes all internet services as needed. Connection-oriented 52 * services are invoked each time a connection is made, by creating a process. 53 * This process is passed the connection as file descriptor 0 and is expected 54 * to do a getpeername to find out the source host and port. 55 * 56 * Datagram oriented services are invoked when a datagram 57 * arrives; a process is created and passed a pending message 58 * on file descriptor 0. Datagram servers may either connect 59 * to their peer, freeing up the original socket for inetd 60 * to receive further messages on, or ``take over the socket'', 61 * processing all arriving datagrams and, eventually, timing 62 * out. The first type of server is said to be ``multi-threaded''; 63 * the second type of server ``single-threaded''. 64 * 65 * Inetd uses a configuration file which is read at startup 66 * and, possibly, at some later time in response to a hangup signal. 67 * The configuration file is ``free format'' with fields given in the 68 * order shown below. Continuation lines for an entry must begin with 69 * a space or tab. All fields must be present in each entry. 70 * 71 * service name must be in /etc/services or must 72 * name a tcpmux service 73 * socket type stream/dgram/raw/rdm/seqpacket 74 * protocol must be in /etc/protocols 75 * wait/nowait single-threaded/multi-threaded 76 * user user to run daemon as 77 * server program full path name 78 * server program arguments maximum of MAXARGS (20) 79 * 80 * TCP services without official port numbers are handled with the 81 * RFC1078-based tcpmux internal service. Tcpmux listens on port 1 for 82 * requests. When a connection is made from a foreign host, the service 83 * requested is passed to tcpmux, which looks it up in the servtab list 84 * and returns the proper entry for the service. Tcpmux returns a 85 * negative reply if the service doesn't exist, otherwise the invoked 86 * server is expected to return the positive reply if the service type in 87 * inetd.conf file has the prefix "tcpmux/". If the service type has the 88 * prefix "tcpmux/+", tcpmux will return the positive reply for the 89 * process; this is for compatibility with older server code, and also 90 * allows you to invoke programs that use stdin/stdout without putting any 91 * special server code in them. Services that use tcpmux are "nowait" 92 * because they do not have a well-known port and hence cannot listen 93 * for new requests. 94 * 95 * For RPC services 96 * service name/version must be in /etc/rpc 97 * socket type stream/dgram/raw/rdm/seqpacket 98 * protocol must be in /etc/protocols 99 * wait/nowait single-threaded/multi-threaded 100 * user user to run daemon as 101 * server program full path name 102 * server program arguments maximum of MAXARGS 103 * 104 * Comment lines are indicated by a `#' in column 1. 105 * 106 * #ifdef IPSEC 107 * Comment lines that start with "#@" denote IPsec policy string, as described 108 * in ipsec_set_policy(3). This will affect all the following items in 109 * inetd.conf(8). To reset the policy, just use "#@" line. By default, 110 * there's no IPsec policy. 111 * #endif 112 */ 113 #include <sys/param.h> 114 #include <sys/ioctl.h> 115 #include <sys/wait.h> 116 #include <sys/time.h> 117 #include <sys/resource.h> 118 119 #include <netinet/in.h> 120 #include <netinet/tcp.h> 121 #include <arpa/inet.h> 122 #include <rpc/rpc.h> 123 #include <rpc/pmap_clnt.h> 124 125 #include <errno.h> 126 #include <err.h> 127 #include <fcntl.h> 128 #include <grp.h> 129 #include <netdb.h> 130 #include <pwd.h> 131 #include <signal.h> 132 #include <stdio.h> 133 #include <stdlib.h> 134 #include <string.h> 135 #include <syslog.h> 136 #include <tcpd.h> 137 #include <unistd.h> 138 #include <libutil.h> 139 #include <sysexits.h> 140 #include <ctype.h> 141 142 #include "inetd.h" 143 #include "pathnames.h" 144 145 #ifdef IPSEC 146 #include <netinet6/ipsec.h> 147 #ifndef IPSEC_POLICY_IPSEC /* no ipsec support on old ipsec */ 148 #undef IPSEC 149 #endif 150 #endif 151 152 /* wrapper for KAME-special getnameinfo() */ 153 #ifndef NI_WITHSCOPEID 154 #define NI_WITHSCOPEID 0 155 #endif 156 157 #ifndef LIBWRAP_ALLOW_FACILITY 158 # define LIBWRAP_ALLOW_FACILITY LOG_AUTH 159 #endif 160 #ifndef LIBWRAP_ALLOW_SEVERITY 161 # define LIBWRAP_ALLOW_SEVERITY LOG_INFO 162 #endif 163 #ifndef LIBWRAP_DENY_FACILITY 164 # define LIBWRAP_DENY_FACILITY LOG_AUTH 165 #endif 166 #ifndef LIBWRAP_DENY_SEVERITY 167 # define LIBWRAP_DENY_SEVERITY LOG_WARNING 168 #endif 169 170 #define ISWRAP(sep) \ 171 ( ((wrap_ex && !(sep)->se_bi) || (wrap_bi && (sep)->se_bi)) \ 172 && ( ((sep)->se_accept && (sep)->se_socktype == SOCK_STREAM) \ 173 || (sep)->se_socktype == SOCK_DGRAM)) 174 175 #ifdef LOGIN_CAP 176 #include <login_cap.h> 177 178 /* see init.c */ 179 #define RESOURCE_RC "daemon" 180 181 #endif 182 183 #ifndef MAXCHILD 184 #define MAXCHILD -1 /* maximum number of this service 185 < 0 = no limit */ 186 #endif 187 188 #ifndef MAXCPM 189 #define MAXCPM -1 /* rate limit invocations from a 190 single remote address, 191 < 0 = no limit */ 192 #endif 193 194 #ifndef TOOMANY 195 #define TOOMANY 256 /* don't start more than TOOMANY */ 196 #endif 197 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */ 198 #define RETRYTIME (60*10) /* retry after bind or server fail */ 199 #define MAX_MAXCHLD 32767 /* max allowable max children */ 200 201 #define SIGBLOCK (sigmask(SIGCHLD)|sigmask(SIGHUP)|sigmask(SIGALRM)) 202 203 int allow_severity; 204 int deny_severity; 205 int wrap_ex = 0; 206 int wrap_bi = 0; 207 int debug = 0; 208 int log = 0; 209 int maxsock; /* highest-numbered descriptor */ 210 fd_set allsock; 211 int options; 212 int timingout; 213 int toomany = TOOMANY; 214 int maxchild = MAXCHILD; 215 int maxcpm = MAXCPM; 216 struct servent *sp; 217 struct rpcent *rpc; 218 char *hostname = NULL; 219 struct sockaddr_in *bind_sa4; 220 int no_v4bind = 1; 221 #ifdef INET6 222 struct sockaddr_in6 *bind_sa6; 223 int no_v6bind = 1; 224 #endif 225 int signalpipe[2]; 226 #ifdef SANITY_CHECK 227 int nsock; 228 #endif 229 230 struct servtab *servtab; 231 232 extern struct biltin biltins[]; 233 234 #define NUMINT (sizeof(intab) / sizeof(struct inent)) 235 char *CONFIG = _PATH_INETDCONF; 236 char *pid_file = _PATH_INETDPID; 237 238 #ifdef OLD_SETPROCTITLE 239 char **Argv; 240 char *LastArg; 241 #endif 242 243 int 244 getvalue(arg, value, whine) 245 char *arg, *whine; 246 int *value; 247 { 248 int tmp; 249 char *p; 250 251 tmp = strtol(arg, &p, 0); 252 if (tmp < 0 || *p) { 253 syslog(LOG_ERR, whine, arg); 254 return 1; /* failure */ 255 } 256 *value = tmp; 257 return 0; /* success */ 258 } 259 260 int 261 main(argc, argv, envp) 262 int argc; 263 char *argv[], *envp[]; 264 { 265 struct servtab *sep; 266 struct passwd *pwd; 267 struct group *grp; 268 struct sigaction sa, saalrm, sachld, sahup, sapipe; 269 int tmpint, ch, dofork; 270 pid_t pid; 271 char buf[50]; 272 #ifdef LOGIN_CAP 273 login_cap_t *lc = NULL; 274 #endif 275 struct request_info req; 276 int denied; 277 char *service = NULL; 278 char *pnm; 279 union { 280 struct sockaddr peer_un; 281 struct sockaddr_in peer_un4; 282 struct sockaddr_in6 peer_un6; 283 struct sockaddr_storage peer_max; 284 } p_un; 285 #define peer p_un.peer_un 286 #define peer4 p_un.peer_un4 287 #define peer6 p_un.peer_un6 288 #define peermax p_un.peer_max 289 int i; 290 struct addrinfo hints, *res; 291 char *servname; 292 int error; 293 294 295 #ifdef OLD_SETPROCTITLE 296 Argv = argv; 297 if (envp == 0 || *envp == 0) 298 envp = argv; 299 while (*envp) 300 envp++; 301 LastArg = envp[-1] + strlen(envp[-1]); 302 #endif 303 304 openlog("inetd", LOG_PID | LOG_NOWAIT, LOG_DAEMON); 305 306 while ((ch = getopt(argc, argv, "dlwWR:a:c:C:p:")) != -1) 307 switch(ch) { 308 case 'd': 309 debug = 1; 310 options |= SO_DEBUG; 311 break; 312 case 'l': 313 log = 1; 314 break; 315 case 'R': 316 getvalue(optarg, &toomany, 317 "-R %s: bad value for service invocation rate"); 318 break; 319 case 'c': 320 getvalue(optarg, &maxchild, 321 "-c %s: bad value for maximum children"); 322 break; 323 case 'C': 324 getvalue(optarg, &maxcpm, 325 "-C %s: bad value for maximum children/minute"); 326 break; 327 case 'a': 328 hostname = optarg; 329 break; 330 case 'p': 331 pid_file = optarg; 332 break; 333 case 'w': 334 wrap_ex++; 335 break; 336 case 'W': 337 wrap_bi++; 338 break; 339 case '?': 340 default: 341 syslog(LOG_ERR, 342 "usage: inetd [-dlwW] [-a address] [-R rate]" 343 " [-c maximum] [-C rate]" 344 " [-p pidfile] [conf-file]"); 345 exit(EX_USAGE); 346 } 347 /* 348 * Initialize Bind Addrs. 349 * When hostname is NULL, wild card bind addrs are obtained from 350 * getaddrinfo(). But getaddrinfo() requires at least one of 351 * hostname or servname is non NULL. 352 * So when hostname is NULL, set dummy value to servname. 353 */ 354 servname = (hostname == NULL) ? "discard" /* dummy */ : NULL; 355 356 bzero(&hints, sizeof(struct addrinfo)); 357 hints.ai_flags = AI_PASSIVE; 358 hints.ai_family = AF_UNSPEC; 359 error = getaddrinfo(hostname, servname, &hints, &res); 360 if (error != 0) { 361 syslog(LOG_ERR, "-a %s: %s", hostname, gai_strerror(error)); 362 if (error == EAI_SYSTEM) 363 syslog(LOG_ERR, "%s", strerror(errno)); 364 exit(EX_USAGE); 365 } 366 do { 367 if (res->ai_addr == NULL) { 368 syslog(LOG_ERR, "-a %s: getaddrinfo failed", hostname); 369 exit(EX_USAGE); 370 } 371 switch (res->ai_addr->sa_family) { 372 case AF_INET: 373 if (no_v4bind == 0) 374 continue; 375 bind_sa4 = (struct sockaddr_in *)res->ai_addr; 376 /* init port num in case servname is dummy */ 377 bind_sa4->sin_port = 0; 378 no_v4bind = 0; 379 continue; 380 #ifdef INET6 381 case AF_INET6: 382 if (no_v6bind == 0) 383 continue; 384 bind_sa6 = (struct sockaddr_in6 *)res->ai_addr; 385 /* init port num in case servname is dummy */ 386 bind_sa6->sin6_port = 0; 387 no_v6bind = 0; 388 continue; 389 #endif 390 } 391 if (no_v4bind == 0 392 #ifdef INET6 393 && no_v6bind == 0 394 #endif 395 ) 396 break; 397 } while ((res = res->ai_next) != NULL); 398 if (no_v4bind != 0 399 #ifdef INET6 400 && no_v6bind != 0 401 #endif 402 ) { 403 syslog(LOG_ERR, "-a %s: unknown address family", hostname); 404 exit(EX_USAGE); 405 } 406 407 argc -= optind; 408 argv += optind; 409 410 if (argc > 0) 411 CONFIG = argv[0]; 412 if (debug == 0) { 413 FILE *fp; 414 if (daemon(0, 0) < 0) { 415 syslog(LOG_WARNING, "daemon(0,0) failed: %m"); 416 } 417 /* 418 * In case somebody has started inetd manually, we need to 419 * clear the logname, so that old servers run as root do not 420 * get the user's logname.. 421 */ 422 if (setlogin("") < 0) { 423 syslog(LOG_WARNING, "cannot clear logname: %m"); 424 /* no big deal if it fails.. */ 425 } 426 pid = getpid(); 427 fp = fopen(pid_file, "w"); 428 if (fp) { 429 fprintf(fp, "%ld\n", (long)pid); 430 fclose(fp); 431 } else { 432 syslog(LOG_WARNING, "%s: %m", pid_file); 433 } 434 } 435 sa.sa_flags = 0; 436 sigemptyset(&sa.sa_mask); 437 sigaddset(&sa.sa_mask, SIGALRM); 438 sigaddset(&sa.sa_mask, SIGCHLD); 439 sigaddset(&sa.sa_mask, SIGHUP); 440 sa.sa_handler = flag_retry; 441 sigaction(SIGALRM, &sa, &saalrm); 442 config(); 443 sa.sa_handler = flag_config; 444 sigaction(SIGHUP, &sa, &sahup); 445 sa.sa_handler = flag_reapchild; 446 sigaction(SIGCHLD, &sa, &sachld); 447 sa.sa_handler = SIG_IGN; 448 sigaction(SIGPIPE, &sa, &sapipe); 449 450 { 451 /* space for daemons to overwrite environment for ps */ 452 #define DUMMYSIZE 100 453 char dummy[DUMMYSIZE]; 454 455 (void)memset(dummy, 'x', DUMMYSIZE - 1); 456 dummy[DUMMYSIZE - 1] = '\0'; 457 (void)setenv("inetd_dummy", dummy, 1); 458 } 459 460 if (pipe(signalpipe) != 0) { 461 syslog(LOG_ERR, "pipe: %m"); 462 exit(EX_OSERR); 463 } 464 FD_SET(signalpipe[0], &allsock); 465 #ifdef SANITY_CHECK 466 nsock++; 467 #endif 468 if (signalpipe[0] > maxsock) 469 maxsock = signalpipe[0]; 470 if (signalpipe[1] > maxsock) 471 maxsock = signalpipe[1]; 472 473 for (;;) { 474 int n, ctrl; 475 fd_set readable; 476 477 #ifdef SANITY_CHECK 478 if (nsock == 0) { 479 syslog(LOG_ERR, "%s: nsock=0", __FUNCTION__); 480 exit(EX_SOFTWARE); 481 } 482 #endif 483 readable = allsock; 484 if ((n = select(maxsock + 1, &readable, (fd_set *)0, 485 (fd_set *)0, (struct timeval *)0)) <= 0) { 486 if (n < 0 && errno != EINTR) { 487 syslog(LOG_WARNING, "select: %m"); 488 sleep(1); 489 } 490 continue; 491 } 492 /* handle any queued signal flags */ 493 if (FD_ISSET(signalpipe[0], &readable)) { 494 int n; 495 if (ioctl(signalpipe[0], FIONREAD, &n) != 0) { 496 syslog(LOG_ERR, "ioctl: %m"); 497 exit(EX_OSERR); 498 } 499 while (--n >= 0) { 500 char c; 501 if (read(signalpipe[0], &c, 1) != 1) { 502 syslog(LOG_ERR, "read: %m"); 503 exit(EX_OSERR); 504 } 505 if (debug) 506 warnx("handling signal flag %c", c); 507 switch(c) { 508 case 'A': /* sigalrm */ 509 retry(); 510 break; 511 case 'C': /* sigchld */ 512 reapchild(); 513 break; 514 case 'H': /* sighup */ 515 config(); 516 break; 517 } 518 } 519 } 520 for (sep = servtab; n && sep; sep = sep->se_next) 521 if (sep->se_fd != -1 && FD_ISSET(sep->se_fd, &readable)) { 522 n--; 523 if (debug) 524 warnx("someone wants %s", sep->se_service); 525 if (sep->se_accept && sep->se_socktype == SOCK_STREAM) { 526 i = 1; 527 if (ioctl(sep->se_fd, FIONBIO, &i) < 0) 528 syslog(LOG_ERR, "ioctl (FIONBIO, 1): %m"); 529 ctrl = accept(sep->se_fd, (struct sockaddr *)0, 530 (int *)0); 531 if (debug) 532 warnx("accept, ctrl %d", ctrl); 533 if (ctrl < 0) { 534 if (errno != EINTR) 535 syslog(LOG_WARNING, 536 "accept (for %s): %m", 537 sep->se_service); 538 if (sep->se_accept && 539 sep->se_socktype == SOCK_STREAM) 540 close(ctrl); 541 continue; 542 } 543 i = 0; 544 if (ioctl(sep->se_fd, FIONBIO, &i) < 0) 545 syslog(LOG_ERR, "ioctl1(FIONBIO, 0): %m"); 546 if (ioctl(ctrl, FIONBIO, &i) < 0) 547 syslog(LOG_ERR, "ioctl2(FIONBIO, 0): %m"); 548 if (cpmip(sep, ctrl) < 0) { 549 close(ctrl); 550 continue; 551 } 552 } else 553 ctrl = sep->se_fd; 554 if (log && !ISWRAP(sep)) { 555 char pname[INET6_ADDRSTRLEN]; 556 pnm = "unknown"; 557 i = sizeof peermax; 558 if (getpeername(ctrl, (struct sockaddr *) 559 &peermax, &i)) { 560 i = sizeof peermax; 561 if (recvfrom(ctrl, buf, sizeof(buf), 562 MSG_PEEK, 563 (struct sockaddr *)&peermax, 564 &i) >= 0) { 565 getnameinfo((struct sockaddr *)&peermax, 566 peer.sa_len, 567 pname, sizeof(pname), 568 NULL, 0, 569 NI_NUMERICHOST| 570 NI_WITHSCOPEID); 571 pnm = pname; 572 } 573 } else { 574 getnameinfo((struct sockaddr *)&peermax, 575 peer.sa_len, 576 pname, sizeof(pname), 577 NULL, 0, 578 NI_NUMERICHOST| 579 NI_WITHSCOPEID); 580 pnm = pname; 581 } 582 syslog(LOG_INFO,"%s from %s", sep->se_service, pnm); 583 } 584 (void) sigblock(SIGBLOCK); 585 pid = 0; 586 /* 587 * Fork for all external services, builtins which need to 588 * fork and anything we're wrapping (as wrapping might 589 * block or use hosts_options(5) twist). 590 */ 591 dofork = !sep->se_bi || sep->se_bi->bi_fork || ISWRAP(sep); 592 if (dofork) { 593 if (sep->se_count++ == 0) 594 (void)gettimeofday(&sep->se_time, (struct timezone *)NULL); 595 else if (toomany > 0 && sep->se_count >= toomany) { 596 struct timeval now; 597 598 (void)gettimeofday(&now, (struct timezone *)NULL); 599 if (now.tv_sec - sep->se_time.tv_sec > 600 CNT_INTVL) { 601 sep->se_time = now; 602 sep->se_count = 1; 603 } else { 604 syslog(LOG_ERR, 605 "%s/%s server failing (looping), service terminated", 606 sep->se_service, sep->se_proto); 607 if (sep->se_accept && 608 sep->se_socktype == SOCK_STREAM) 609 close(ctrl); 610 close_sep(sep); 611 sigsetmask(0L); 612 if (!timingout) { 613 timingout = 1; 614 alarm(RETRYTIME); 615 } 616 continue; 617 } 618 } 619 pid = fork(); 620 } 621 if (pid < 0) { 622 syslog(LOG_ERR, "fork: %m"); 623 if (sep->se_accept && 624 sep->se_socktype == SOCK_STREAM) 625 close(ctrl); 626 sigsetmask(0L); 627 sleep(1); 628 continue; 629 } 630 if (pid) 631 addchild(sep, pid); 632 sigsetmask(0L); 633 if (pid == 0) { 634 if (dofork) { 635 if (debug) 636 warnx("+ closing from %d", maxsock); 637 for (tmpint = maxsock; tmpint > 2; tmpint--) 638 if (tmpint != ctrl) 639 (void) close(tmpint); 640 sigaction(SIGALRM, &saalrm, (struct sigaction *)0); 641 sigaction(SIGCHLD, &sachld, (struct sigaction *)0); 642 sigaction(SIGHUP, &sahup, (struct sigaction *)0); 643 /* SIGPIPE reset before exec */ 644 } 645 /* 646 * Call tcpmux to find the real service to exec. 647 */ 648 if (sep->se_bi && 649 sep->se_bi->bi_fn == (void (*)()) tcpmux) { 650 sep = tcpmux(ctrl); 651 if (sep == NULL) { 652 close(ctrl); 653 _exit(0); 654 } 655 } 656 if (ISWRAP(sep)) { 657 inetd_setproctitle("wrapping", ctrl); 658 service = sep->se_server_name ? 659 sep->se_server_name : sep->se_service; 660 request_init(&req, RQ_DAEMON, service, RQ_FILE, ctrl, NULL); 661 fromhost(&req); 662 deny_severity = LIBWRAP_DENY_FACILITY|LIBWRAP_DENY_SEVERITY; 663 allow_severity = LIBWRAP_ALLOW_FACILITY|LIBWRAP_ALLOW_SEVERITY; 664 denied = !hosts_access(&req); 665 if (denied) { 666 syslog(deny_severity, 667 "refused connection from %.500s, service %s (%s)", 668 eval_client(&req), service, sep->se_proto); 669 if (sep->se_socktype != SOCK_STREAM) 670 recv(ctrl, buf, sizeof (buf), 0); 671 if (dofork) { 672 sleep(1); 673 _exit(0); 674 } 675 } 676 if (log) { 677 syslog(allow_severity, 678 "connection from %.500s, service %s (%s)", 679 eval_client(&req), service, sep->se_proto); 680 } 681 } 682 if (sep->se_bi) { 683 (*sep->se_bi->bi_fn)(ctrl, sep); 684 } else { 685 if (debug) 686 warnx("%d execl %s", 687 getpid(), sep->se_server); 688 dup2(ctrl, 0); 689 close(ctrl); 690 dup2(0, 1); 691 dup2(0, 2); 692 if ((pwd = getpwnam(sep->se_user)) == NULL) { 693 syslog(LOG_ERR, 694 "%s/%s: %s: no such user", 695 sep->se_service, sep->se_proto, 696 sep->se_user); 697 if (sep->se_socktype != SOCK_STREAM) 698 recv(0, buf, sizeof (buf), 0); 699 _exit(EX_NOUSER); 700 } 701 grp = NULL; 702 if ( sep->se_group != NULL 703 && (grp = getgrnam(sep->se_group)) == NULL 704 ) { 705 syslog(LOG_ERR, 706 "%s/%s: %s: no such group", 707 sep->se_service, sep->se_proto, 708 sep->se_group); 709 if (sep->se_socktype != SOCK_STREAM) 710 recv(0, buf, sizeof (buf), 0); 711 _exit(EX_NOUSER); 712 } 713 if (grp != NULL) 714 pwd->pw_gid = grp->gr_gid; 715 #ifdef LOGIN_CAP 716 if ((lc = login_getclass(sep->se_class)) == NULL) { 717 /* error syslogged by getclass */ 718 syslog(LOG_ERR, 719 "%s/%s: %s: login class error", 720 sep->se_service, sep->se_proto, 721 sep->se_class); 722 if (sep->se_socktype != SOCK_STREAM) 723 recv(0, buf, sizeof (buf), 0); 724 _exit(EX_NOUSER); 725 } 726 #endif 727 if (setsid() < 0) { 728 syslog(LOG_ERR, 729 "%s: can't setsid(): %m", 730 sep->se_service); 731 /* _exit(EX_OSERR); not fatal yet */ 732 } 733 #ifdef LOGIN_CAP 734 if (setusercontext(lc, pwd, pwd->pw_uid, 735 LOGIN_SETALL) != 0) { 736 syslog(LOG_ERR, 737 "%s: can't setusercontext(..%s..): %m", 738 sep->se_service, sep->se_user); 739 _exit(EX_OSERR); 740 } 741 #else 742 if (pwd->pw_uid) { 743 if (setlogin(sep->se_user) < 0) { 744 syslog(LOG_ERR, 745 "%s: can't setlogin(%s): %m", 746 sep->se_service, sep->se_user); 747 /* _exit(EX_OSERR); not yet */ 748 } 749 if (setgid(pwd->pw_gid) < 0) { 750 syslog(LOG_ERR, 751 "%s: can't set gid %d: %m", 752 sep->se_service, pwd->pw_gid); 753 _exit(EX_OSERR); 754 } 755 (void) initgroups(pwd->pw_name, 756 pwd->pw_gid); 757 if (setuid(pwd->pw_uid) < 0) { 758 syslog(LOG_ERR, 759 "%s: can't set uid %d: %m", 760 sep->se_service, pwd->pw_uid); 761 _exit(EX_OSERR); 762 } 763 } 764 #endif 765 sigaction(SIGPIPE, &sapipe, 766 (struct sigaction *)0); 767 execv(sep->se_server, sep->se_argv); 768 syslog(LOG_ERR, 769 "cannot execute %s: %m", sep->se_server); 770 if (sep->se_socktype != SOCK_STREAM) 771 recv(0, buf, sizeof (buf), 0); 772 } 773 if (dofork) 774 _exit(0); 775 } 776 if (sep->se_accept && sep->se_socktype == SOCK_STREAM) 777 close(ctrl); 778 } 779 } 780 } 781 782 /* 783 * Add a signal flag to the signal flag queue for later handling 784 */ 785 786 void flag_signal(c) 787 int c; 788 { 789 char ch = c; 790 791 if (write(signalpipe[1], &ch, 1) != 1) { 792 syslog(LOG_ERR, "write: %m"); 793 _exit(EX_OSERR); 794 } 795 } 796 797 /* 798 * Record a new child pid for this service. If we've reached the 799 * limit on children, then stop accepting incoming requests. 800 */ 801 802 void 803 addchild(struct servtab *sep, pid_t pid) 804 { 805 if (sep->se_maxchild <= 0) 806 return; 807 #ifdef SANITY_CHECK 808 if (sep->se_numchild >= sep->se_maxchild) { 809 syslog(LOG_ERR, "%s: %d >= %d", 810 __FUNCTION__, sep->se_numchild, sep->se_maxchild); 811 exit(EX_SOFTWARE); 812 } 813 #endif 814 sep->se_pids[sep->se_numchild++] = pid; 815 if (sep->se_numchild == sep->se_maxchild) 816 disable(sep); 817 } 818 819 /* 820 * Some child process has exited. See if it's on somebody's list. 821 */ 822 823 void 824 flag_reapchild(signo) 825 int signo; 826 { 827 flag_signal('C'); 828 } 829 830 void 831 reapchild() 832 { 833 int k, status; 834 pid_t pid; 835 struct servtab *sep; 836 837 for (;;) { 838 pid = wait3(&status, WNOHANG, (struct rusage *)0); 839 if (pid <= 0) 840 break; 841 if (debug) 842 warnx("%d reaped, status %#x", pid, status); 843 for (sep = servtab; sep; sep = sep->se_next) { 844 for (k = 0; k < sep->se_numchild; k++) 845 if (sep->se_pids[k] == pid) 846 break; 847 if (k == sep->se_numchild) 848 continue; 849 if (sep->se_numchild == sep->se_maxchild) 850 enable(sep); 851 sep->se_pids[k] = sep->se_pids[--sep->se_numchild]; 852 if (status) 853 syslog(LOG_WARNING, 854 "%s[%d]: exit status 0x%x", 855 sep->se_server, pid, status); 856 break; 857 } 858 } 859 } 860 861 void 862 flag_config(signo) 863 int signo; 864 { 865 flag_signal('H'); 866 } 867 868 void config() 869 { 870 struct servtab *sep, *new, **sepp; 871 long omask; 872 873 if (!setconfig()) { 874 syslog(LOG_ERR, "%s: %m", CONFIG); 875 return; 876 } 877 for (sep = servtab; sep; sep = sep->se_next) 878 sep->se_checked = 0; 879 while ((new = getconfigent())) { 880 if (getpwnam(new->se_user) == NULL) { 881 syslog(LOG_ERR, 882 "%s/%s: no such user '%s', service ignored", 883 new->se_service, new->se_proto, new->se_user); 884 continue; 885 } 886 if (new->se_group && getgrnam(new->se_group) == NULL) { 887 syslog(LOG_ERR, 888 "%s/%s: no such group '%s', service ignored", 889 new->se_service, new->se_proto, new->se_group); 890 continue; 891 } 892 #ifdef LOGIN_CAP 893 if (login_getclass(new->se_class) == NULL) { 894 /* error syslogged by getclass */ 895 syslog(LOG_ERR, 896 "%s/%s: %s: login class error, service ignored", 897 new->se_service, new->se_proto, new->se_class); 898 continue; 899 } 900 #endif 901 for (sep = servtab; sep; sep = sep->se_next) 902 if (strcmp(sep->se_service, new->se_service) == 0 && 903 strcmp(sep->se_proto, new->se_proto) == 0 && 904 sep->se_family == new->se_family) 905 break; 906 if (sep != 0) { 907 int i; 908 909 #define SWAP(a, b) { typeof(a) c = a; a = b; b = c; } 910 omask = sigblock(SIGBLOCK); 911 if (sep->se_nomapped != new->se_nomapped) { 912 sep->se_nomapped = new->se_nomapped; 913 sep->se_reset = 1; 914 } 915 /* copy over outstanding child pids */ 916 if (sep->se_maxchild > 0 && new->se_maxchild > 0) { 917 new->se_numchild = sep->se_numchild; 918 if (new->se_numchild > new->se_maxchild) 919 new->se_numchild = new->se_maxchild; 920 memcpy(new->se_pids, sep->se_pids, 921 new->se_numchild * sizeof(*new->se_pids)); 922 } 923 SWAP(sep->se_pids, new->se_pids); 924 sep->se_maxchild = new->se_maxchild; 925 sep->se_numchild = new->se_numchild; 926 sep->se_maxcpm = new->se_maxcpm; 927 sep->se_bi = new->se_bi; 928 /* might need to turn on or off service now */ 929 if (sep->se_fd >= 0) { 930 if (sep->se_maxchild > 0 931 && sep->se_numchild == sep->se_maxchild) { 932 if (FD_ISSET(sep->se_fd, &allsock)) 933 disable(sep); 934 } else { 935 if (!FD_ISSET(sep->se_fd, &allsock)) 936 enable(sep); 937 } 938 } 939 sep->se_accept = new->se_accept; 940 SWAP(sep->se_user, new->se_user); 941 SWAP(sep->se_group, new->se_group); 942 #ifdef LOGIN_CAP 943 SWAP(sep->se_class, new->se_class); 944 #endif 945 SWAP(sep->se_server, new->se_server); 946 SWAP(sep->se_server_name, new->se_server_name); 947 for (i = 0; i < MAXARGV; i++) 948 SWAP(sep->se_argv[i], new->se_argv[i]); 949 #ifdef IPSEC 950 SWAP(sep->se_policy, new->se_policy); 951 ipsecsetup(sep); 952 #endif 953 sigsetmask(omask); 954 freeconfig(new); 955 if (debug) 956 print_service("REDO", sep); 957 } else { 958 sep = enter(new); 959 if (debug) 960 print_service("ADD ", sep); 961 } 962 sep->se_checked = 1; 963 if (ISMUX(sep)) { 964 sep->se_fd = -1; 965 continue; 966 } 967 switch (sep->se_family) { 968 case AF_INET: 969 if (no_v4bind != 0) { 970 sep->se_fd = -1; 971 continue; 972 } 973 break; 974 #ifdef INET6 975 case AF_INET6: 976 if (no_v6bind != 0) { 977 sep->se_fd = -1; 978 continue; 979 } 980 break; 981 #endif 982 } 983 if (!sep->se_rpc) { 984 sp = getservbyname(sep->se_service, sep->se_proto); 985 if (sp == 0) { 986 syslog(LOG_ERR, "%s/%s: unknown service", 987 sep->se_service, sep->se_proto); 988 sep->se_checked = 0; 989 continue; 990 } 991 switch (sep->se_family) { 992 case AF_INET: 993 if (sep->se_ctladdrinitok == 0) { 994 memcpy(&sep->se_ctrladdr4, bind_sa4, 995 sizeof(sep->se_ctrladdr4)); 996 sep->se_ctrladdr_size = 997 sizeof(sep->se_ctrladdr4); 998 } 999 if (sp->s_port != sep->se_ctrladdr4.sin_port) { 1000 sep->se_ctrladdr4.sin_port = 1001 sp->s_port; 1002 sep->se_reset = 1; 1003 } 1004 break; 1005 #ifdef INET6 1006 case AF_INET6: 1007 if (sep->se_ctladdrinitok == 0) { 1008 memcpy(&sep->se_ctrladdr6, bind_sa6, 1009 sizeof(sep->se_ctrladdr6)); 1010 sep->se_ctrladdr_size = 1011 sizeof(sep->se_ctrladdr6); 1012 } 1013 if (sp->s_port != 1014 sep->se_ctrladdr6.sin6_port) { 1015 sep->se_ctrladdr6.sin6_port = 1016 sp->s_port; 1017 sep->se_reset = 1; 1018 } 1019 break; 1020 #endif 1021 } 1022 if (sep->se_reset != 0 && sep->se_fd >= 0) 1023 close_sep(sep); 1024 } else { 1025 rpc = getrpcbyname(sep->se_service); 1026 if (rpc == 0) { 1027 syslog(LOG_ERR, "%s/%s unknown RPC service", 1028 sep->se_service, sep->se_proto); 1029 if (sep->se_fd != -1) 1030 (void) close(sep->se_fd); 1031 sep->se_fd = -1; 1032 continue; 1033 } 1034 if (rpc->r_number != sep->se_rpc_prog) { 1035 if (sep->se_rpc_prog) 1036 unregisterrpc(sep); 1037 sep->se_rpc_prog = rpc->r_number; 1038 if (sep->se_fd != -1) 1039 (void) close(sep->se_fd); 1040 sep->se_fd = -1; 1041 } 1042 } 1043 if (sep->se_fd == -1) 1044 setup(sep); 1045 } 1046 endconfig(); 1047 /* 1048 * Purge anything not looked at above. 1049 */ 1050 omask = sigblock(SIGBLOCK); 1051 sepp = &servtab; 1052 while ((sep = *sepp)) { 1053 if (sep->se_checked) { 1054 sepp = &sep->se_next; 1055 continue; 1056 } 1057 *sepp = sep->se_next; 1058 if (sep->se_fd >= 0) 1059 close_sep(sep); 1060 if (debug) 1061 print_service("FREE", sep); 1062 if (sep->se_rpc && sep->se_rpc_prog > 0) 1063 unregisterrpc(sep); 1064 freeconfig(sep); 1065 free((char *)sep); 1066 } 1067 (void) sigsetmask(omask); 1068 } 1069 1070 void 1071 unregisterrpc(sep) 1072 struct servtab *sep; 1073 { 1074 int i; 1075 struct servtab *sepp; 1076 long omask; 1077 1078 omask = sigblock(SIGBLOCK); 1079 for (sepp = servtab; sepp; sepp = sepp->se_next) { 1080 if (sepp == sep) 1081 continue; 1082 if (sep->se_checked == 0 || 1083 !sepp->se_rpc || 1084 sep->se_rpc_prog != sepp->se_rpc_prog) 1085 continue; 1086 return; 1087 } 1088 if (debug) 1089 print_service("UNREG", sep); 1090 for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) 1091 pmap_unset(sep->se_rpc_prog, i); 1092 if (sep->se_fd != -1) 1093 (void) close(sep->se_fd); 1094 sep->se_fd = -1; 1095 (void) sigsetmask(omask); 1096 } 1097 1098 void 1099 flag_retry(signo) 1100 int signo; 1101 { 1102 flag_signal('A'); 1103 } 1104 1105 void 1106 retry() 1107 { 1108 struct servtab *sep; 1109 1110 timingout = 0; 1111 for (sep = servtab; sep; sep = sep->se_next) 1112 if (sep->se_fd == -1 && !ISMUX(sep)) 1113 setup(sep); 1114 } 1115 1116 void 1117 setup(sep) 1118 struct servtab *sep; 1119 { 1120 int on = 1; 1121 1122 if ((sep->se_fd = socket(sep->se_family, sep->se_socktype, 0)) < 0) { 1123 if (debug) 1124 warn("socket failed on %s/%s", 1125 sep->se_service, sep->se_proto); 1126 syslog(LOG_ERR, "%s/%s: socket: %m", 1127 sep->se_service, sep->se_proto); 1128 return; 1129 } 1130 #define turnon(fd, opt) \ 1131 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on)) 1132 if (strcmp(sep->se_proto, "tcp") == 0 && (options & SO_DEBUG) && 1133 turnon(sep->se_fd, SO_DEBUG) < 0) 1134 syslog(LOG_ERR, "setsockopt (SO_DEBUG): %m"); 1135 if (turnon(sep->se_fd, SO_REUSEADDR) < 0) 1136 syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m"); 1137 #ifdef SO_PRIVSTATE 1138 if (turnon(sep->se_fd, SO_PRIVSTATE) < 0) 1139 syslog(LOG_ERR, "setsockopt (SO_PRIVSTATE): %m"); 1140 #endif 1141 /* tftpd opens a new connection then needs more infos */ 1142 if ((sep->se_family == AF_INET6) && 1143 (strcmp(sep->se_proto, "udp") == 0) && 1144 (sep->se_accept == 0) && 1145 (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_PKTINFO, 1146 (char *)&on, sizeof (on)) < 0)) 1147 syslog(LOG_ERR, "setsockopt (IPV6_RECVPKTINFO): %m"); 1148 #ifdef IPV6_BINDV6ONLY 1149 if (sep->se_family == AF_INET6) { 1150 int flag = sep->se_nomapped ? 1 : 0; 1151 if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_BINDV6ONLY, 1152 (char *)&flag, sizeof (flag)) < 0) 1153 syslog(LOG_ERR, "setsockopt (IPV6_BINDV6ONLY): %m"); 1154 } 1155 #endif /* IPV6_BINDV6ONLY */ 1156 #undef turnon 1157 if (sep->se_type == TTCP_TYPE) 1158 if (setsockopt(sep->se_fd, IPPROTO_TCP, TCP_NOPUSH, 1159 (char *)&on, sizeof (on)) < 0) 1160 syslog(LOG_ERR, "setsockopt (TCP_NOPUSH): %m"); 1161 #ifdef IPV6_FAITH 1162 if (sep->se_type == FAITH_TYPE) { 1163 if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_FAITH, &on, 1164 sizeof(on)) < 0) { 1165 syslog(LOG_ERR, "setsockopt (IPV6_FAITH): %m"); 1166 } 1167 } 1168 #endif 1169 #ifdef IPSEC 1170 ipsecsetup(sep); 1171 #endif 1172 if (bind(sep->se_fd, (struct sockaddr *)&sep->se_ctrladdr, 1173 sep->se_ctrladdr_size) < 0) { 1174 if (debug) 1175 warn("bind failed on %s/%s", 1176 sep->se_service, sep->se_proto); 1177 syslog(LOG_ERR, "%s/%s: bind: %m", 1178 sep->se_service, sep->se_proto); 1179 (void) close(sep->se_fd); 1180 sep->se_fd = -1; 1181 if (!timingout) { 1182 timingout = 1; 1183 alarm(RETRYTIME); 1184 } 1185 return; 1186 } 1187 if (sep->se_rpc) { 1188 int i, len = sep->se_ctrladdr_size; 1189 1190 if (sep->se_family != AF_INET) { 1191 syslog(LOG_ERR, 1192 "%s/%s: unsupported address family for rpc", 1193 sep->se_service, sep->se_proto); 1194 (void) close(sep->se_fd); 1195 sep->se_fd = -1; 1196 return; 1197 } 1198 if (getsockname(sep->se_fd, 1199 (struct sockaddr*)&sep->se_ctrladdr, &len) < 0){ 1200 syslog(LOG_ERR, "%s/%s: getsockname: %m", 1201 sep->se_service, sep->se_proto); 1202 (void) close(sep->se_fd); 1203 sep->se_fd = -1; 1204 return; 1205 } 1206 if (debug) 1207 print_service("REG ", sep); 1208 for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) { 1209 pmap_unset(sep->se_rpc_prog, i); 1210 pmap_set(sep->se_rpc_prog, i, 1211 (sep->se_socktype == SOCK_DGRAM) 1212 ? IPPROTO_UDP : IPPROTO_TCP, 1213 ntohs(sep->se_ctrladdr4.sin_port)); 1214 } 1215 } 1216 if (sep->se_socktype == SOCK_STREAM) 1217 listen(sep->se_fd, 64); 1218 enable(sep); 1219 if (debug) { 1220 warnx("registered %s on %d", 1221 sep->se_server, sep->se_fd); 1222 } 1223 } 1224 1225 #ifdef IPSEC 1226 void 1227 ipsecsetup(sep) 1228 struct servtab *sep; 1229 { 1230 char *buf; 1231 char *policy_in = NULL; 1232 char *policy_out = NULL; 1233 int level; 1234 int opt; 1235 1236 switch (sep->se_family) { 1237 case AF_INET: 1238 level = IPPROTO_IP; 1239 opt = IP_IPSEC_POLICY; 1240 break; 1241 #ifdef INET6 1242 case AF_INET6: 1243 level = IPPROTO_IPV6; 1244 opt = IPV6_IPSEC_POLICY; 1245 break; 1246 #endif 1247 default: 1248 return; 1249 } 1250 1251 if (!sep->se_policy || sep->se_policy[0] == '\0') { 1252 policy_in = "in entrust"; 1253 policy_out = "out entrust"; 1254 } else { 1255 if (!strncmp("in", sep->se_policy, 2)) 1256 policy_in = sep->se_policy; 1257 else if (!strncmp("out", sep->se_policy, 3)) 1258 policy_out = sep->se_policy; 1259 else { 1260 syslog(LOG_ERR, "invalid security policy \"%s\"", 1261 sep->se_policy); 1262 return; 1263 } 1264 } 1265 1266 if (policy_in != NULL) { 1267 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 1268 if (buf != NULL) { 1269 if (setsockopt(sep->se_fd, level, opt, 1270 buf, ipsec_get_policylen(buf)) < 0 && 1271 debug != 0) 1272 warnx("%s/%s: ipsec initialization failed; %s", 1273 sep->se_service, sep->se_proto, 1274 policy_in); 1275 free(buf); 1276 } else 1277 syslog(LOG_ERR, "invalid security policy \"%s\"", 1278 policy_in); 1279 } 1280 if (policy_out != NULL) { 1281 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 1282 if (buf != NULL) { 1283 if (setsockopt(sep->se_fd, level, opt, 1284 buf, ipsec_get_policylen(buf)) < 0 && 1285 debug != 0) 1286 warnx("%s/%s: ipsec initialization failed; %s", 1287 sep->se_service, sep->se_proto, 1288 policy_out); 1289 free(buf); 1290 } else 1291 syslog(LOG_ERR, "invalid security policy \"%s\"", 1292 policy_out); 1293 } 1294 } 1295 #endif 1296 1297 /* 1298 * Finish with a service and its socket. 1299 */ 1300 void 1301 close_sep(sep) 1302 struct servtab *sep; 1303 { 1304 if (sep->se_fd >= 0) { 1305 if (FD_ISSET(sep->se_fd, &allsock)) 1306 disable(sep); 1307 (void) close(sep->se_fd); 1308 sep->se_fd = -1; 1309 } 1310 sep->se_count = 0; 1311 sep->se_numchild = 0; /* forget about any existing children */ 1312 } 1313 1314 int 1315 matchservent(name1, name2, proto) 1316 char *name1, *name2, *proto; 1317 { 1318 char **alias; 1319 struct servent *se; 1320 1321 if (strcmp(name1, name2) == 0) 1322 return(1); 1323 if ((se = getservbyname(name1, proto)) != NULL) { 1324 if (strcmp(name2, se->s_name) == 0) 1325 return(1); 1326 for (alias = se->s_aliases; *alias; alias++) 1327 if (strcmp(name2, *alias) == 0) 1328 return(1); 1329 } 1330 return(0); 1331 } 1332 1333 struct servtab * 1334 enter(cp) 1335 struct servtab *cp; 1336 { 1337 struct servtab *sep; 1338 long omask; 1339 1340 sep = (struct servtab *)malloc(sizeof (*sep)); 1341 if (sep == (struct servtab *)0) { 1342 syslog(LOG_ERR, "malloc: %m"); 1343 exit(EX_OSERR); 1344 } 1345 *sep = *cp; 1346 sep->se_fd = -1; 1347 omask = sigblock(SIGBLOCK); 1348 sep->se_next = servtab; 1349 servtab = sep; 1350 sigsetmask(omask); 1351 return (sep); 1352 } 1353 1354 void 1355 enable(sep) 1356 struct servtab *sep; 1357 { 1358 if (debug) 1359 warnx( 1360 "enabling %s, fd %d", sep->se_service, sep->se_fd); 1361 #ifdef SANITY_CHECK 1362 if (sep->se_fd < 0) { 1363 syslog(LOG_ERR, 1364 "%s: %s: bad fd", __FUNCTION__, sep->se_service); 1365 exit(EX_SOFTWARE); 1366 } 1367 if (ISMUX(sep)) { 1368 syslog(LOG_ERR, 1369 "%s: %s: is mux", __FUNCTION__, sep->se_service); 1370 exit(EX_SOFTWARE); 1371 } 1372 if (FD_ISSET(sep->se_fd, &allsock)) { 1373 syslog(LOG_ERR, 1374 "%s: %s: not off", __FUNCTION__, sep->se_service); 1375 exit(EX_SOFTWARE); 1376 } 1377 nsock++; 1378 #endif 1379 FD_SET(sep->se_fd, &allsock); 1380 if (sep->se_fd > maxsock) 1381 maxsock = sep->se_fd; 1382 } 1383 1384 void 1385 disable(sep) 1386 struct servtab *sep; 1387 { 1388 if (debug) 1389 warnx( 1390 "disabling %s, fd %d", sep->se_service, sep->se_fd); 1391 #ifdef SANITY_CHECK 1392 if (sep->se_fd < 0) { 1393 syslog(LOG_ERR, 1394 "%s: %s: bad fd", __FUNCTION__, sep->se_service); 1395 exit(EX_SOFTWARE); 1396 } 1397 if (ISMUX(sep)) { 1398 syslog(LOG_ERR, 1399 "%s: %s: is mux", __FUNCTION__, sep->se_service); 1400 exit(EX_SOFTWARE); 1401 } 1402 if (!FD_ISSET(sep->se_fd, &allsock)) { 1403 syslog(LOG_ERR, 1404 "%s: %s: not on", __FUNCTION__, sep->se_service); 1405 exit(EX_SOFTWARE); 1406 } 1407 if (nsock == 0) { 1408 syslog(LOG_ERR, "%s: nsock=0", __FUNCTION__); 1409 exit(EX_SOFTWARE); 1410 } 1411 nsock--; 1412 #endif 1413 FD_CLR(sep->se_fd, &allsock); 1414 if (sep->se_fd == maxsock) 1415 maxsock--; 1416 } 1417 1418 FILE *fconfig = NULL; 1419 struct servtab serv; 1420 char line[LINE_MAX]; 1421 1422 int 1423 setconfig() 1424 { 1425 1426 if (fconfig != NULL) { 1427 fseek(fconfig, 0L, SEEK_SET); 1428 return (1); 1429 } 1430 fconfig = fopen(CONFIG, "r"); 1431 return (fconfig != NULL); 1432 } 1433 1434 void 1435 endconfig() 1436 { 1437 if (fconfig) { 1438 (void) fclose(fconfig); 1439 fconfig = NULL; 1440 } 1441 } 1442 1443 struct servtab * 1444 getconfigent() 1445 { 1446 struct servtab *sep = &serv; 1447 int argc; 1448 char *cp, *arg, *s; 1449 char *versp; 1450 static char TCPMUX_TOKEN[] = "tcpmux/"; 1451 #define MUX_LEN (sizeof(TCPMUX_TOKEN)-1) 1452 #ifdef IPSEC 1453 char *policy = NULL; 1454 #endif 1455 int v4bind = 0; 1456 #ifdef INET6 1457 int v6bind = 0; 1458 #endif 1459 1460 more: 1461 while ((cp = nextline(fconfig)) != NULL) { 1462 #ifdef IPSEC 1463 /* lines starting with #@ is not a comment, but the policy */ 1464 if (cp[0] == '#' && cp[1] == '@') { 1465 char *p; 1466 for (p = cp + 2; p && *p && isspace(*p); p++) 1467 ; 1468 if (*p == '\0') { 1469 if (policy) 1470 free(policy); 1471 policy = NULL; 1472 } else if (ipsec_get_policylen(p) >= 0) { 1473 if (policy) 1474 free(policy); 1475 policy = newstr(p); 1476 } else { 1477 syslog(LOG_ERR, 1478 "%s: invalid ipsec policy \"%s\"", 1479 CONFIG, p); 1480 exit(EX_CONFIG); 1481 } 1482 } 1483 #endif 1484 if (*cp == '#' || *cp == '\0') 1485 continue; 1486 break; 1487 } 1488 if (cp == NULL) 1489 return ((struct servtab *)0); 1490 /* 1491 * clear the static buffer, since some fields (se_ctrladdr, 1492 * for example) don't get initialized here. 1493 */ 1494 memset((caddr_t)sep, 0, sizeof *sep); 1495 arg = skip(&cp); 1496 if (cp == NULL) { 1497 /* got an empty line containing just blanks/tabs. */ 1498 goto more; 1499 } 1500 if (strncmp(arg, TCPMUX_TOKEN, MUX_LEN) == 0) { 1501 char *c = arg + MUX_LEN; 1502 if (*c == '+') { 1503 sep->se_type = MUXPLUS_TYPE; 1504 c++; 1505 } else 1506 sep->se_type = MUX_TYPE; 1507 sep->se_service = newstr(c); 1508 } else { 1509 sep->se_service = newstr(arg); 1510 sep->se_type = NORM_TYPE; 1511 } 1512 arg = sskip(&cp); 1513 if (strcmp(arg, "stream") == 0) 1514 sep->se_socktype = SOCK_STREAM; 1515 else if (strcmp(arg, "dgram") == 0) 1516 sep->se_socktype = SOCK_DGRAM; 1517 else if (strcmp(arg, "rdm") == 0) 1518 sep->se_socktype = SOCK_RDM; 1519 else if (strcmp(arg, "seqpacket") == 0) 1520 sep->se_socktype = SOCK_SEQPACKET; 1521 else if (strcmp(arg, "raw") == 0) 1522 sep->se_socktype = SOCK_RAW; 1523 else 1524 sep->se_socktype = -1; 1525 1526 arg = sskip(&cp); 1527 if (strncmp(arg, "tcp", 3) == 0) { 1528 sep->se_proto = newstr(strsep(&arg, "/")); 1529 if (arg != NULL) { 1530 if (strcmp(arg, "ttcp") == 0) 1531 sep->se_type = TTCP_TYPE; 1532 else if (strcmp(arg, "faith") == 0) 1533 sep->se_type = FAITH_TYPE; 1534 } 1535 } else 1536 sep->se_proto = newstr(arg); 1537 if (strncmp(sep->se_proto, "rpc/", 4) == 0) { 1538 if (no_v4bind != 0) { 1539 syslog(LOG_INFO, "IPv4 bind is ignored for %s", 1540 sep->se_service); 1541 freeconfig(sep); 1542 goto more; 1543 } 1544 memmove(sep->se_proto, sep->se_proto + 4, 1545 strlen(sep->se_proto) + 1 - 4); 1546 sep->se_rpc = 1; 1547 sep->se_rpc_prog = sep->se_rpc_lowvers = 1548 sep->se_rpc_lowvers = 0; 1549 memcpy(&sep->se_ctrladdr4, bind_sa4, 1550 sizeof(sep->se_ctrladdr4)); 1551 if ((versp = rindex(sep->se_service, '/'))) { 1552 *versp++ = '\0'; 1553 switch (sscanf(versp, "%d-%d", 1554 &sep->se_rpc_lowvers, 1555 &sep->se_rpc_highvers)) { 1556 case 2: 1557 break; 1558 case 1: 1559 sep->se_rpc_highvers = 1560 sep->se_rpc_lowvers; 1561 break; 1562 default: 1563 syslog(LOG_ERR, 1564 "bad RPC version specifier; %s", 1565 sep->se_service); 1566 freeconfig(sep); 1567 goto more; 1568 } 1569 } 1570 else { 1571 sep->se_rpc_lowvers = 1572 sep->se_rpc_highvers = 1; 1573 } 1574 } 1575 sep->se_nomapped = 0; 1576 while (isdigit(sep->se_proto[strlen(sep->se_proto) - 1])) { 1577 #ifdef INET6 1578 if (sep->se_proto[strlen(sep->se_proto) - 1] == '6') { 1579 if (no_v6bind != 0) { 1580 syslog(LOG_INFO, "IPv6 bind is ignored for %s", 1581 sep->se_service); 1582 freeconfig(sep); 1583 goto more; 1584 } 1585 sep->se_proto[strlen(sep->se_proto) - 1] = '\0'; 1586 v6bind = 1; 1587 continue; 1588 } 1589 #endif 1590 if (sep->se_proto[strlen(sep->se_proto) - 1] == '4') { 1591 sep->se_proto[strlen(sep->se_proto) - 1] = '\0'; 1592 v4bind = 1; 1593 continue; 1594 } 1595 /* illegal version num */ 1596 syslog(LOG_ERR, "bad IP version for %s", sep->se_proto); 1597 freeconfig(sep); 1598 goto more; 1599 } 1600 #ifdef INET6 1601 if (v6bind != 0) { 1602 sep->se_family = AF_INET6; 1603 if (v4bind == 0 || no_v4bind != 0) 1604 sep->se_nomapped = 1; 1605 } else 1606 #endif 1607 { /* default to v4 bind if not v6 bind */ 1608 if (no_v4bind != 0) { 1609 syslog(LOG_INFO, "IPv4 bind is ignored for %s", 1610 sep->se_service); 1611 freeconfig(sep); 1612 goto more; 1613 } 1614 sep->se_family = AF_INET; 1615 } 1616 /* init ctladdr */ 1617 switch(sep->se_family) { 1618 case AF_INET: 1619 memcpy(&sep->se_ctrladdr4, bind_sa4, 1620 sizeof(sep->se_ctrladdr4)); 1621 sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr4); 1622 sep->se_ctladdrinitok = 1; 1623 break; 1624 #ifdef INET6 1625 case AF_INET6: 1626 memcpy(&sep->se_ctrladdr6, bind_sa6, 1627 sizeof(sep->se_ctrladdr6)); 1628 sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr6); 1629 sep->se_ctladdrinitok = 1; 1630 break; 1631 #endif 1632 } 1633 arg = sskip(&cp); 1634 if (!strncmp(arg, "wait", 4)) 1635 sep->se_accept = 0; 1636 else if (!strncmp(arg, "nowait", 6)) 1637 sep->se_accept = 1; 1638 else { 1639 syslog(LOG_ERR, 1640 "%s: bad wait/nowait for service %s", 1641 CONFIG, sep->se_service); 1642 goto more; 1643 } 1644 sep->se_maxchild = -1; 1645 sep->se_maxcpm = -1; 1646 if ((s = strchr(arg, '/')) != NULL) { 1647 char *eptr; 1648 u_long val; 1649 1650 val = strtoul(s + 1, &eptr, 10); 1651 if (eptr == s + 1 || val > MAX_MAXCHLD) { 1652 syslog(LOG_ERR, 1653 "%s: bad max-child for service %s", 1654 CONFIG, sep->se_service); 1655 goto more; 1656 } 1657 if (debug) 1658 if (!sep->se_accept && val != 1) 1659 warnx("maxchild=%lu for wait service %s" 1660 " not recommended", val, sep->se_service); 1661 sep->se_maxchild = val; 1662 if (*eptr == '/') 1663 sep->se_maxcpm = strtol(eptr + 1, &eptr, 10); 1664 /* 1665 * explicitly do not check for \0 for future expansion / 1666 * backwards compatibility 1667 */ 1668 } 1669 if (ISMUX(sep)) { 1670 /* 1671 * Silently enforce "nowait" mode for TCPMUX services 1672 * since they don't have an assigned port to listen on. 1673 */ 1674 sep->se_accept = 1; 1675 if (strcmp(sep->se_proto, "tcp")) { 1676 syslog(LOG_ERR, 1677 "%s: bad protocol for tcpmux service %s", 1678 CONFIG, sep->se_service); 1679 goto more; 1680 } 1681 if (sep->se_socktype != SOCK_STREAM) { 1682 syslog(LOG_ERR, 1683 "%s: bad socket type for tcpmux service %s", 1684 CONFIG, sep->se_service); 1685 goto more; 1686 } 1687 } 1688 sep->se_user = newstr(sskip(&cp)); 1689 #ifdef LOGIN_CAP 1690 if ((s = strrchr(sep->se_user, '/')) != NULL) { 1691 *s = '\0'; 1692 sep->se_class = newstr(s + 1); 1693 } else 1694 sep->se_class = newstr(RESOURCE_RC); 1695 #endif 1696 if ((s = strrchr(sep->se_user, ':')) != NULL) { 1697 *s = '\0'; 1698 sep->se_group = newstr(s + 1); 1699 } else 1700 sep->se_group = NULL; 1701 sep->se_server = newstr(sskip(&cp)); 1702 if ((sep->se_server_name = rindex(sep->se_server, '/'))) 1703 sep->se_server_name++; 1704 if (strcmp(sep->se_server, "internal") == 0) { 1705 struct biltin *bi; 1706 1707 for (bi = biltins; bi->bi_service; bi++) 1708 if (bi->bi_socktype == sep->se_socktype && 1709 matchservent(bi->bi_service, sep->se_service, 1710 sep->se_proto)) 1711 break; 1712 if (bi->bi_service == 0) { 1713 syslog(LOG_ERR, "internal service %s unknown", 1714 sep->se_service); 1715 goto more; 1716 } 1717 sep->se_accept = 1; /* force accept mode for built-ins */ 1718 sep->se_bi = bi; 1719 } else 1720 sep->se_bi = NULL; 1721 if (sep->se_maxcpm < 0) 1722 sep->se_maxcpm = maxcpm; 1723 if (sep->se_maxchild < 0) { /* apply default max-children */ 1724 if (sep->se_bi && sep->se_bi->bi_maxchild >= 0) 1725 sep->se_maxchild = sep->se_bi->bi_maxchild; 1726 else if (sep->se_accept) 1727 sep->se_maxchild = maxchild > 0 ? maxchild : 0; 1728 else 1729 sep->se_maxchild = 1; 1730 } 1731 if (sep->se_maxchild > 0) { 1732 sep->se_pids = malloc(sep->se_maxchild * sizeof(*sep->se_pids)); 1733 if (sep->se_pids == NULL) { 1734 syslog(LOG_ERR, "malloc: %m"); 1735 exit(EX_OSERR); 1736 } 1737 } 1738 argc = 0; 1739 for (arg = skip(&cp); cp; arg = skip(&cp)) 1740 if (argc < MAXARGV) { 1741 sep->se_argv[argc++] = newstr(arg); 1742 } else { 1743 syslog(LOG_ERR, 1744 "%s: too many arguments for service %s", 1745 CONFIG, sep->se_service); 1746 goto more; 1747 } 1748 while (argc <= MAXARGV) 1749 sep->se_argv[argc++] = NULL; 1750 #ifdef IPSEC 1751 sep->se_policy = policy ? newstr(policy) : NULL; 1752 #endif 1753 return (sep); 1754 } 1755 1756 void 1757 freeconfig(cp) 1758 struct servtab *cp; 1759 { 1760 int i; 1761 1762 if (cp->se_service) 1763 free(cp->se_service); 1764 if (cp->se_proto) 1765 free(cp->se_proto); 1766 if (cp->se_user) 1767 free(cp->se_user); 1768 if (cp->se_group) 1769 free(cp->se_group); 1770 #ifdef LOGIN_CAP 1771 if (cp->se_class) 1772 free(cp->se_class); 1773 #endif 1774 if (cp->se_server) 1775 free(cp->se_server); 1776 if (cp->se_pids) 1777 free(cp->se_pids); 1778 for (i = 0; i < MAXARGV; i++) 1779 if (cp->se_argv[i]) 1780 free(cp->se_argv[i]); 1781 #ifdef IPSEC 1782 if (cp->se_policy) 1783 free(cp->se_policy); 1784 #endif 1785 } 1786 1787 1788 /* 1789 * Safe skip - if skip returns null, log a syntax error in the 1790 * configuration file and exit. 1791 */ 1792 char * 1793 sskip(cpp) 1794 char **cpp; 1795 { 1796 char *cp; 1797 1798 cp = skip(cpp); 1799 if (cp == NULL) { 1800 syslog(LOG_ERR, "%s: syntax error", CONFIG); 1801 exit(EX_DATAERR); 1802 } 1803 return (cp); 1804 } 1805 1806 char * 1807 skip(cpp) 1808 char **cpp; 1809 { 1810 char *cp = *cpp; 1811 char *start; 1812 char quote = '\0'; 1813 1814 again: 1815 while (*cp == ' ' || *cp == '\t') 1816 cp++; 1817 if (*cp == '\0') { 1818 int c; 1819 1820 c = getc(fconfig); 1821 (void) ungetc(c, fconfig); 1822 if (c == ' ' || c == '\t') 1823 if ((cp = nextline(fconfig))) 1824 goto again; 1825 *cpp = (char *)0; 1826 return ((char *)0); 1827 } 1828 if (*cp == '"' || *cp == '\'') 1829 quote = *cp++; 1830 start = cp; 1831 if (quote) 1832 while (*cp && *cp != quote) 1833 cp++; 1834 else 1835 while (*cp && *cp != ' ' && *cp != '\t') 1836 cp++; 1837 if (*cp != '\0') 1838 *cp++ = '\0'; 1839 *cpp = cp; 1840 return (start); 1841 } 1842 1843 char * 1844 nextline(fd) 1845 FILE *fd; 1846 { 1847 char *cp; 1848 1849 if (fgets(line, sizeof (line), fd) == NULL) 1850 return ((char *)0); 1851 cp = strchr(line, '\n'); 1852 if (cp) 1853 *cp = '\0'; 1854 return (line); 1855 } 1856 1857 char * 1858 newstr(cp) 1859 char *cp; 1860 { 1861 if ((cp = strdup(cp ? cp : ""))) 1862 return (cp); 1863 syslog(LOG_ERR, "strdup: %m"); 1864 exit(EX_OSERR); 1865 } 1866 1867 #ifdef OLD_SETPROCTITLE 1868 void 1869 inetd_setproctitle(a, s) 1870 char *a; 1871 int s; 1872 { 1873 int size; 1874 char *cp; 1875 struct sockaddr_storage ss; 1876 char buf[80], pbuf[INET6_ADDRSTRLEN]; 1877 1878 cp = Argv[0]; 1879 size = sizeof(ss); 1880 if (getpeername(s, (struct sockaddr *)&ss, &size) == 0) { 1881 getnameinfo((struct sockaddr *)&ss, size, pbuf, sizeof(pbuf), 1882 NULL, 0, NI_NUMERICHOST|NI_WITHSCOPEID); 1883 (void) sprintf(buf, "-%s [%s]", a, pbuf); 1884 } else 1885 (void) sprintf(buf, "-%s", a); 1886 strncpy(cp, buf, LastArg - cp); 1887 cp += strlen(cp); 1888 while (cp < LastArg) 1889 *cp++ = ' '; 1890 } 1891 #else 1892 void 1893 inetd_setproctitle(a, s) 1894 char *a; 1895 int s; 1896 { 1897 int size; 1898 struct sockaddr_storage ss; 1899 char buf[80], pbuf[INET6_ADDRSTRLEN]; 1900 1901 size = sizeof(ss); 1902 if (getpeername(s, (struct sockaddr *)&ss, &size) == 0) { 1903 getnameinfo((struct sockaddr *)&ss, size, pbuf, sizeof(pbuf), 1904 NULL, 0, NI_NUMERICHOST|NI_WITHSCOPEID); 1905 (void) sprintf(buf, "%s [%s]", a, pbuf); 1906 } else 1907 (void) sprintf(buf, "%s", a); 1908 setproctitle("%s", buf); 1909 } 1910 #endif 1911 1912 1913 /* 1914 * Internet services provided internally by inetd: 1915 */ 1916 1917 int check_loop(sa, sep) 1918 struct sockaddr *sa; 1919 struct servtab *sep; 1920 { 1921 struct servtab *se2; 1922 char pname[INET6_ADDRSTRLEN]; 1923 1924 for (se2 = servtab; se2; se2 = se2->se_next) { 1925 if (!se2->se_bi || se2->se_socktype != SOCK_DGRAM) 1926 continue; 1927 1928 switch (se2->se_family) { 1929 case AF_INET: 1930 if (((struct sockaddr_in *)sa)->sin_port == 1931 se2->se_ctrladdr4.sin_port) 1932 goto isloop; 1933 continue; 1934 #ifdef INET6 1935 case AF_INET6: 1936 if (((struct sockaddr_in *)sa)->sin_port == 1937 se2->se_ctrladdr4.sin_port) 1938 goto isloop; 1939 continue; 1940 #endif 1941 default: 1942 continue; 1943 } 1944 isloop: 1945 getnameinfo(sa, sa->sa_len, pname, sizeof(pname), NULL, 0, 1946 NI_NUMERICHOST|NI_WITHSCOPEID); 1947 syslog(LOG_WARNING, "%s/%s:%s/%s loop request REFUSED from %s", 1948 sep->se_service, sep->se_proto, 1949 se2->se_service, se2->se_proto, 1950 pname); 1951 return 1; 1952 } 1953 return 0; 1954 } 1955 1956 /* 1957 * print_service: 1958 * Dump relevant information to stderr 1959 */ 1960 void 1961 print_service(action, sep) 1962 char *action; 1963 struct servtab *sep; 1964 { 1965 fprintf(stderr, 1966 "%s: %s proto=%s accept=%d max=%d user=%s group=%s" 1967 #ifdef LOGIN_CAP 1968 "class=%s" 1969 #endif 1970 " builtin=%p server=%s" 1971 #ifdef IPSEC 1972 " policy=\"%s\"" 1973 #endif 1974 "\n", 1975 action, sep->se_service, sep->se_proto, 1976 sep->se_accept, sep->se_maxchild, sep->se_user, sep->se_group, 1977 #ifdef LOGIN_CAP 1978 sep->se_class, 1979 #endif 1980 (void *) sep->se_bi, sep->se_server 1981 #ifdef IPSEC 1982 , (sep->se_policy ? sep->se_policy : "") 1983 #endif 1984 ); 1985 } 1986 1987 #define CPMHSIZE 256 1988 #define CPMHMASK (CPMHSIZE-1) 1989 #define CHTGRAN 10 1990 #define CHTSIZE 6 1991 1992 typedef struct CTime { 1993 unsigned long ct_Ticks; 1994 int ct_Count; 1995 } CTime; 1996 1997 typedef struct CHash { 1998 union { 1999 struct in_addr c4_Addr; 2000 struct in6_addr c6_Addr; 2001 } cu_Addr; 2002 #define ch_Addr4 cu_Addr.c4_Addr 2003 #define ch_Addr6 cu_Addr.c6_Addr 2004 int ch_Family; 2005 time_t ch_LTime; 2006 char *ch_Service; 2007 CTime ch_Times[CHTSIZE]; 2008 } CHash; 2009 2010 CHash CHashAry[CPMHSIZE]; 2011 2012 int 2013 cpmip(sep, ctrl) 2014 struct servtab *sep; 2015 int ctrl; 2016 { 2017 struct sockaddr_storage rss; 2018 int rssLen = sizeof(rss); 2019 int r = 0; 2020 2021 /* 2022 * If getpeername() fails, just let it through (if logging is 2023 * enabled the condition is caught elsewhere) 2024 */ 2025 2026 if (sep->se_maxcpm > 0 && 2027 getpeername(ctrl, (struct sockaddr *)&rss, &rssLen) == 0 ) { 2028 time_t t = time(NULL); 2029 int hv = 0xABC3D20F; 2030 int i; 2031 int cnt = 0; 2032 CHash *chBest = NULL; 2033 unsigned int ticks = t / CHTGRAN; 2034 struct sockaddr_in *sin; 2035 #ifdef INET6 2036 struct sockaddr_in6 *sin6; 2037 #endif 2038 2039 sin = (struct sockaddr_in *)&rss; 2040 #ifdef INET6 2041 sin6 = (struct sockaddr_in6 *)&rss; 2042 #endif 2043 { 2044 char *p; 2045 int i, addrlen; 2046 2047 switch (rss.ss_family) { 2048 case AF_INET: 2049 p = (char *)&sin->sin_addr; 2050 addrlen = sizeof(struct in_addr); 2051 break; 2052 #ifdef INET6 2053 case AF_INET6: 2054 p = (char *)&sin6->sin6_addr; 2055 addrlen = sizeof(struct in6_addr); 2056 break; 2057 #endif 2058 default: 2059 /* should not happen */ 2060 return -1; 2061 } 2062 2063 for (i = 0; i < addrlen; ++i, ++p) { 2064 hv = (hv << 5) ^ (hv >> 23) ^ *p; 2065 } 2066 hv = (hv ^ (hv >> 16)); 2067 } 2068 for (i = 0; i < 5; ++i) { 2069 CHash *ch = &CHashAry[(hv + i) & CPMHMASK]; 2070 2071 if (rss.ss_family == AF_INET && 2072 ch->ch_Family == AF_INET && 2073 sin->sin_addr.s_addr == ch->ch_Addr4.s_addr && 2074 ch->ch_Service && strcmp(sep->se_service, 2075 ch->ch_Service) == 0) { 2076 chBest = ch; 2077 break; 2078 } 2079 #ifdef INET6 2080 if (rss.ss_family == AF_INET6 && 2081 ch->ch_Family == AF_INET6 && 2082 IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 2083 &ch->ch_Addr6) != 0 && 2084 ch->ch_Service && strcmp(sep->se_service, 2085 ch->ch_Service) == 0) { 2086 chBest = ch; 2087 break; 2088 } 2089 #endif 2090 if (chBest == NULL || ch->ch_LTime == 0 || 2091 ch->ch_LTime < chBest->ch_LTime) { 2092 chBest = ch; 2093 } 2094 } 2095 if ((rss.ss_family == AF_INET && 2096 (chBest->ch_Family != AF_INET || 2097 sin->sin_addr.s_addr != chBest->ch_Addr4.s_addr)) || 2098 chBest->ch_Service == NULL || 2099 strcmp(sep->se_service, chBest->ch_Service) != 0) { 2100 chBest->ch_Family = sin->sin_family; 2101 chBest->ch_Addr4 = sin->sin_addr; 2102 if (chBest->ch_Service) 2103 free(chBest->ch_Service); 2104 chBest->ch_Service = strdup(sep->se_service); 2105 bzero(chBest->ch_Times, sizeof(chBest->ch_Times)); 2106 } 2107 #ifdef INET6 2108 if ((rss.ss_family == AF_INET6 && 2109 (chBest->ch_Family != AF_INET6 || 2110 IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 2111 &chBest->ch_Addr6) == 0)) || 2112 chBest->ch_Service == NULL || 2113 strcmp(sep->se_service, chBest->ch_Service) != 0) { 2114 chBest->ch_Family = sin6->sin6_family; 2115 chBest->ch_Addr6 = sin6->sin6_addr; 2116 if (chBest->ch_Service) 2117 free(chBest->ch_Service); 2118 chBest->ch_Service = strdup(sep->se_service); 2119 bzero(chBest->ch_Times, sizeof(chBest->ch_Times)); 2120 } 2121 #endif 2122 chBest->ch_LTime = t; 2123 { 2124 CTime *ct = &chBest->ch_Times[ticks % CHTSIZE]; 2125 if (ct->ct_Ticks != ticks) { 2126 ct->ct_Ticks = ticks; 2127 ct->ct_Count = 0; 2128 } 2129 ++ct->ct_Count; 2130 } 2131 for (i = 0; i < CHTSIZE; ++i) { 2132 CTime *ct = &chBest->ch_Times[i]; 2133 if (ct->ct_Ticks <= ticks && 2134 ct->ct_Ticks >= ticks - CHTSIZE) { 2135 cnt += ct->ct_Count; 2136 } 2137 } 2138 if (cnt * (CHTSIZE * CHTGRAN) / 60 > sep->se_maxcpm) { 2139 char pname[INET6_ADDRSTRLEN]; 2140 2141 getnameinfo((struct sockaddr *)&rss, 2142 ((struct sockaddr *)&rss)->sa_len, 2143 pname, sizeof(pname), NULL, 0, 2144 NI_NUMERICHOST|NI_WITHSCOPEID); 2145 r = -1; 2146 syslog(LOG_ERR, 2147 "%s from %s exceeded counts/min (limit %d/min)", 2148 sep->se_service, pname, 2149 sep->se_maxcpm); 2150 } 2151 } 2152 return(r); 2153 } 2154