1 /* 2 * ntpdc - control and monitor your ntpd daemon 3 */ 4 #include <config.h> 5 #include <stdio.h> 6 #include <stddef.h> 7 #include <ctype.h> 8 #include <signal.h> 9 #include <setjmp.h> 10 #ifdef HAVE_UNISTD_H 11 # include <unistd.h> 12 #endif 13 #ifdef HAVE_FCNTL_H 14 # include <fcntl.h> 15 #endif 16 #ifdef SYS_WINNT 17 # include <mswsock.h> 18 #endif 19 #include <isc/net.h> 20 #include <isc/result.h> 21 22 #include "ntpdc.h" 23 #include "ntp_select.h" 24 #include "ntp_stdlib.h" 25 #include "ntp_assert.h" 26 #include "ntp_lineedit.h" 27 #ifdef OPENSSL 28 #include "openssl/evp.h" 29 #include "openssl/objects.h" 30 #endif 31 #include <ssl_applink.c> 32 33 #include "ntp_libopts.h" 34 #include "ntpdc-opts.h" 35 #include "safecast.h" 36 37 #ifdef SYS_VXWORKS 38 /* vxWorks needs mode flag -casey*/ 39 # define open(name, flags) open(name, flags, 0777) 40 # define SERVER_PORT_NUM 123 41 #endif 42 43 /* We use COMMAND as an autogen keyword */ 44 #ifdef COMMAND 45 # undef COMMAND 46 #endif 47 48 /* 49 * Because we now potentially understand a lot of commands (and 50 * it requires a lot of commands to talk to ntpd) we will run 51 * interactive if connected to a terminal. 52 */ 53 static int interactive = 0; /* set to 1 when we should prompt */ 54 static const char * prompt = "ntpdc> "; /* prompt to ask him about */ 55 56 /* 57 * Keyid used for authenticated requests. Obtained on the fly. 58 */ 59 static u_long info_auth_keyid; 60 static int keyid_entered = 0; 61 62 static int info_auth_keytype = NID_md5; /* MD5 */ 63 static size_t info_auth_hashlen = 16; /* MD5 */ 64 u_long current_time; /* needed by authkeys; not used */ 65 66 /* 67 * for get_systime() 68 */ 69 s_char sys_precision; /* local clock precision (log2 s) */ 70 71 int ntpdcmain (int, char **); 72 /* 73 * Built in command handler declarations 74 */ 75 static int openhost (const char *); 76 static int sendpkt (void *, size_t); 77 static void growpktdata (void); 78 static int getresponse (int, int, size_t *, size_t *, const char **, size_t); 79 static int sendrequest (int, int, int, size_t, size_t, const char *); 80 static void getcmds (void); 81 static RETSIGTYPE abortcmd (int); 82 static void docmd (const char *); 83 static void tokenize (const char *, char **, int *); 84 static int findcmd (char *, struct xcmd *, struct xcmd *, struct xcmd **); 85 static int getarg (char *, int, arg_v *); 86 static int getnetnum (const char *, sockaddr_u *, char *, int); 87 static void help (struct parse *, FILE *); 88 static int helpsort (const void *, const void *); 89 static void printusage (struct xcmd *, FILE *); 90 static void timeout (struct parse *, FILE *); 91 static void my_delay (struct parse *, FILE *); 92 static void host (struct parse *, FILE *); 93 static void keyid (struct parse *, FILE *); 94 static void keytype (struct parse *, FILE *); 95 static void passwd (struct parse *, FILE *); 96 static void hostnames (struct parse *, FILE *); 97 static void setdebug (struct parse *, FILE *); 98 static void quit (struct parse *, FILE *); 99 static void version (struct parse *, FILE *); 100 static void warning (const char *, ...) 101 __attribute__((__format__(__printf__, 1, 2))); 102 static void error (const char *, ...) 103 __attribute__((__format__(__printf__, 1, 2))); 104 static u_long getkeyid (const char *); 105 106 107 108 /* 109 * Built-in commands we understand 110 */ 111 static struct xcmd builtins[] = { 112 { "?", help, { OPT|NTP_STR, NO, NO, NO }, 113 { "command", "", "", "" }, 114 "tell the use and syntax of commands" }, 115 { "help", help, { OPT|NTP_STR, NO, NO, NO }, 116 { "command", "", "", "" }, 117 "tell the use and syntax of commands" }, 118 { "timeout", timeout, { OPT|NTP_UINT, NO, NO, NO }, 119 { "msec", "", "", "" }, 120 "set the primary receive time out" }, 121 { "delay", my_delay, { OPT|NTP_INT, NO, NO, NO }, 122 { "msec", "", "", "" }, 123 "set the delay added to encryption time stamps" }, 124 { "host", host, { OPT|NTP_STR, OPT|NTP_STR, NO, NO }, 125 { "-4|-6", "hostname", "", "" }, 126 "specify the host whose NTP server we talk to" }, 127 { "passwd", passwd, { OPT|NTP_STR, NO, NO, NO }, 128 { "", "", "", "" }, 129 "specify a password to use for authenticated requests"}, 130 { "hostnames", hostnames, { OPT|NTP_STR, NO, NO, NO }, 131 { "yes|no", "", "", "" }, 132 "specify whether hostnames or net numbers are printed"}, 133 { "debug", setdebug, { OPT|NTP_STR, NO, NO, NO }, 134 { "no|more|less", "", "", "" }, 135 "set/change debugging level" }, 136 { "quit", quit, { NO, NO, NO, NO }, 137 { "", "", "", "" }, 138 "exit ntpdc" }, 139 { "exit", quit, { NO, NO, NO, NO }, 140 { "", "", "", "" }, 141 "exit ntpdc" }, 142 { "keyid", keyid, { OPT|NTP_UINT, NO, NO, NO }, 143 { "key#", "", "", "" }, 144 "set/show keyid to use for authenticated requests" }, 145 { "keytype", keytype, { OPT|NTP_STR, NO, NO, NO }, 146 { "(md5|des)", "", "", "" }, 147 "set/show key authentication type for authenticated requests (des|md5)" }, 148 { "version", version, { NO, NO, NO, NO }, 149 { "", "", "", "" }, 150 "print version number" }, 151 { 0, 0, { NO, NO, NO, NO }, 152 { "", "", "", "" }, "" } 153 }; 154 155 156 /* 157 * Default values we use. 158 */ 159 #define DEFHOST "localhost" /* default host name */ 160 #define DEFTIMEOUT (5) /* 5 second time out */ 161 #define DEFSTIMEOUT (2) /* 2 second time out after first */ 162 #define DEFDELAY 0x51EB852 /* 20 milliseconds, l_fp fraction */ 163 #define LENHOSTNAME 256 /* host name is 256 characters long */ 164 #define MAXCMDS 100 /* maximum commands on cmd line */ 165 #define MAXHOSTS 200 /* maximum hosts on cmd line */ 166 #define MAXLINE 512 /* maximum line length */ 167 #define MAXTOKENS (1+1+MAXARGS+MOREARGS+2) /* maximum number of usable tokens */ 168 #define SCREENWIDTH 78 /* nominal screen width in columns */ 169 170 /* 171 * Some variables used and manipulated locally 172 */ 173 static struct sock_timeval tvout = { DEFTIMEOUT, 0 }; /* time out for reads */ 174 static struct sock_timeval tvsout = { DEFSTIMEOUT, 0 };/* secondary time out */ 175 static l_fp delay_time; /* delay time */ 176 static char currenthost[LENHOSTNAME]; /* current host name */ 177 int showhostnames = 1; /* show host names by default */ 178 179 static int ai_fam_templ; /* address family */ 180 static int ai_fam_default; /* default address family */ 181 static SOCKET sockfd; /* fd socket is opened on */ 182 static int havehost = 0; /* set to 1 when host open */ 183 int s_port = 0; 184 185 /* 186 * Holds data returned from queries. We allocate INITDATASIZE 187 * octets to begin with, increasing this as we need to. 188 */ 189 #define INITDATASIZE (sizeof(struct resp_pkt) * 16) 190 #define INCDATASIZE (sizeof(struct resp_pkt) * 8) 191 192 static char *pktdata; 193 static int pktdatasize; 194 195 /* 196 * These are used to help the magic with old and new versions of ntpd. 197 */ 198 int impl_ver = IMPL_XNTPD; 199 static int req_pkt_size = REQ_LEN_NOMAC; 200 201 /* 202 * For commands typed on the command line (with the -c option) 203 */ 204 static int numcmds = 0; 205 static const char *ccmds[MAXCMDS]; 206 #define ADDCMD(cp) if (numcmds < MAXCMDS) ccmds[numcmds++] = (cp) 207 208 /* 209 * When multiple hosts are specified. 210 */ 211 static int numhosts = 0; 212 static const char *chosts[MAXHOSTS]; 213 #define ADDHOST(cp) if (numhosts < MAXHOSTS) chosts[numhosts++] = (cp) 214 215 /* 216 * Error codes for internal use 217 */ 218 #define ERR_INCOMPLETE 16 219 #define ERR_TIMEOUT 17 220 221 /* 222 * Macro definitions we use 223 */ 224 #define ISSPACE(c) ((c) == ' ' || (c) == '\t') 225 #define ISEOL(c) ((c) == '\n' || (c) == '\r' || (c) == '\0') 226 #define STREQ(a, b) (*(a) == *(b) && strcmp((a), (b)) == 0) 227 228 /* 229 * Jump buffer for longjumping back to the command level 230 */ 231 static jmp_buf interrupt_buf; 232 static volatile int jump = 0; 233 234 /* 235 * Pointer to current output unit 236 */ 237 static FILE *current_output; 238 239 /* 240 * Command table imported from ntpdc_ops.c 241 */ 242 extern struct xcmd opcmds[]; 243 244 char const *progname; 245 246 #ifdef NO_MAIN_ALLOWED 247 CALL(ntpdc,"ntpdc",ntpdcmain); 248 #else 249 int 250 main( 251 int argc, 252 char *argv[] 253 ) 254 { 255 return ntpdcmain(argc, argv); 256 } 257 #endif 258 259 #ifdef SYS_VXWORKS 260 void clear_globals(void) 261 { 262 showhostnames = 0; /* show host names by default */ 263 havehost = 0; /* set to 1 when host open */ 264 numcmds = 0; 265 numhosts = 0; 266 } 267 #endif 268 269 /* 270 * main - parse arguments and handle options 271 */ 272 int 273 ntpdcmain( 274 int argc, 275 char *argv[] 276 ) 277 { 278 279 delay_time.l_ui = 0; 280 delay_time.l_uf = DEFDELAY; 281 282 #ifdef SYS_VXWORKS 283 clear_globals(); 284 taskPrioritySet(taskIdSelf(), 100 ); 285 #endif 286 287 init_lib(); /* sets up ipv4_works, ipv6_works */ 288 ssl_applink(); 289 init_auth(); 290 291 /* Check to see if we have IPv6. Otherwise default to IPv4 */ 292 if (!ipv6_works) 293 ai_fam_default = AF_INET; 294 295 progname = argv[0]; 296 297 { 298 int optct = ntpOptionProcess(&ntpdcOptions, argc, argv); 299 argc -= optct; 300 argv += optct; 301 } 302 303 if (HAVE_OPT(IPV4)) 304 ai_fam_templ = AF_INET; 305 else if (HAVE_OPT(IPV6)) 306 ai_fam_templ = AF_INET6; 307 else 308 ai_fam_templ = ai_fam_default; 309 310 if (HAVE_OPT(COMMAND)) { 311 int cmdct = STACKCT_OPT( COMMAND ); 312 const char** cmds = STACKLST_OPT( COMMAND ); 313 314 while (cmdct-- > 0) { 315 ADDCMD(*cmds++); 316 } 317 } 318 319 debug = OPT_VALUE_SET_DEBUG_LEVEL; 320 321 if (HAVE_OPT(INTERACTIVE)) { 322 interactive = 1; 323 } 324 325 if (HAVE_OPT(NUMERIC)) { 326 showhostnames = 0; 327 } 328 329 if (HAVE_OPT(LISTPEERS)) { 330 ADDCMD("listpeers"); 331 } 332 333 if (HAVE_OPT(PEERS)) { 334 ADDCMD("peers"); 335 } 336 337 if (HAVE_OPT(SHOWPEERS)) { 338 ADDCMD("dmpeers"); 339 } 340 341 if (ntp_optind == argc) { 342 ADDHOST(DEFHOST); 343 } else { 344 for (; ntp_optind < argc; ntp_optind++) 345 ADDHOST(argv[ntp_optind]); 346 } 347 348 if (numcmds == 0 && interactive == 0 349 && isatty(fileno(stdin)) && isatty(fileno(stderr))) { 350 interactive = 1; 351 } 352 353 #ifndef SYS_WINNT /* Under NT cannot handle SIGINT, WIN32 spawns a handler */ 354 if (interactive) 355 (void) signal_no_reset(SIGINT, abortcmd); 356 #endif /* SYS_WINNT */ 357 358 /* 359 * Initialize the packet data buffer 360 */ 361 pktdatasize = INITDATASIZE; 362 pktdata = emalloc(INITDATASIZE); 363 364 if (numcmds == 0) { 365 (void) openhost(chosts[0]); 366 getcmds(); 367 } else { 368 int ihost; 369 int icmd; 370 371 for (ihost = 0; ihost < numhosts; ihost++) { 372 if (openhost(chosts[ihost])) 373 for (icmd = 0; icmd < numcmds; icmd++) { 374 if (numhosts > 1) 375 printf ("--- %s ---\n",chosts[ihost]); 376 docmd(ccmds[icmd]); 377 } 378 } 379 } 380 #ifdef SYS_WINNT 381 WSACleanup(); 382 #endif 383 return(0); 384 } /* main end */ 385 386 387 /* 388 * openhost - open a socket to a host 389 */ 390 static int 391 openhost( 392 const char *hname 393 ) 394 { 395 char temphost[LENHOSTNAME]; 396 int a_info, i; 397 struct addrinfo hints, *ai = NULL; 398 sockaddr_u addr; 399 size_t octets; 400 register const char *cp; 401 char name[LENHOSTNAME]; 402 char service[5]; 403 404 /* 405 * We need to get by the [] if they were entered 406 */ 407 408 cp = hname; 409 410 if (*cp == '[') { 411 cp++; 412 for (i = 0; *cp && *cp != ']'; cp++, i++) 413 name[i] = *cp; 414 if (*cp == ']') { 415 name[i] = '\0'; 416 hname = name; 417 } else { 418 return 0; 419 } 420 } 421 422 /* 423 * First try to resolve it as an ip address and if that fails, 424 * do a fullblown (dns) lookup. That way we only use the dns 425 * when it is needed and work around some implementations that 426 * will return an "IPv4-mapped IPv6 address" address if you 427 * give it an IPv4 address to lookup. 428 */ 429 strlcpy(service, "ntp", sizeof(service)); 430 ZERO(hints); 431 hints.ai_family = ai_fam_templ; 432 hints.ai_protocol = IPPROTO_UDP; 433 hints.ai_socktype = SOCK_DGRAM; 434 hints.ai_flags = Z_AI_NUMERICHOST; 435 436 a_info = getaddrinfo(hname, service, &hints, &ai); 437 if (a_info == EAI_NONAME 438 #ifdef EAI_NODATA 439 || a_info == EAI_NODATA 440 #endif 441 ) { 442 hints.ai_flags = AI_CANONNAME; 443 #ifdef AI_ADDRCONFIG 444 hints.ai_flags |= AI_ADDRCONFIG; 445 #endif 446 a_info = getaddrinfo(hname, service, &hints, &ai); 447 } 448 /* Some older implementations don't like AI_ADDRCONFIG. */ 449 if (a_info == EAI_BADFLAGS) { 450 hints.ai_flags = AI_CANONNAME; 451 a_info = getaddrinfo(hname, service, &hints, &ai); 452 } 453 if (a_info != 0) { 454 fprintf(stderr, "%s\n", gai_strerror(a_info)); 455 if (ai != NULL) 456 freeaddrinfo(ai); 457 return 0; 458 } 459 460 /* 461 * getaddrinfo() has returned without error so ai should not 462 * be NULL. 463 */ 464 INSIST(ai != NULL); 465 ZERO(addr); 466 octets = min(sizeof(addr), ai->ai_addrlen); 467 memcpy(&addr, ai->ai_addr, octets); 468 469 if (ai->ai_canonname == NULL) 470 strlcpy(temphost, stoa(&addr), sizeof(temphost)); 471 else 472 strlcpy(temphost, ai->ai_canonname, sizeof(temphost)); 473 474 if (debug > 2) 475 printf("Opening host %s\n", temphost); 476 477 if (havehost == 1) { 478 if (debug > 2) 479 printf("Closing old host %s\n", currenthost); 480 closesocket(sockfd); 481 havehost = 0; 482 } 483 strlcpy(currenthost, temphost, sizeof(currenthost)); 484 485 /* port maps to the same in both families */ 486 s_port = NSRCPORT(&addr);; 487 #ifdef SYS_VXWORKS 488 ((struct sockaddr_in6 *)&hostaddr)->sin6_port = htons(SERVER_PORT_NUM); 489 if (ai->ai_family == AF_INET) 490 *(struct sockaddr_in *)&hostaddr= 491 *((struct sockaddr_in *)ai->ai_addr); 492 else 493 *(struct sockaddr_in6 *)&hostaddr= 494 *((struct sockaddr_in6 *)ai->ai_addr); 495 #endif /* SYS_VXWORKS */ 496 497 #ifdef SYS_WINNT 498 { 499 int optionValue = SO_SYNCHRONOUS_NONALERT; 500 int err; 501 502 err = setsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char *)&optionValue, sizeof(optionValue)); 503 if (err != NO_ERROR) { 504 (void) fprintf(stderr, "cannot open nonoverlapped sockets\n"); 505 exit(1); 506 } 507 } 508 #endif /* SYS_WINNT */ 509 510 sockfd = socket(ai->ai_family, SOCK_DGRAM, 0); 511 if (sockfd == INVALID_SOCKET) { 512 error("socket"); 513 exit(-1); 514 } 515 516 #ifdef NEED_RCVBUF_SLOP 517 # ifdef SO_RCVBUF 518 { 519 int rbufsize = INITDATASIZE + 2048; /* 2K for slop */ 520 521 if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, 522 &rbufsize, sizeof(int)) == -1) 523 error("setsockopt"); 524 } 525 # endif 526 #endif 527 528 #ifdef SYS_VXWORKS 529 if (connect(sockfd, (struct sockaddr *)&hostaddr, 530 sizeof(hostaddr)) == -1) 531 #else 532 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) == -1) 533 #endif /* SYS_VXWORKS */ 534 { 535 error("connect"); 536 exit(-1); 537 } 538 539 freeaddrinfo(ai); 540 havehost = 1; 541 req_pkt_size = REQ_LEN_NOMAC; 542 impl_ver = IMPL_XNTPD; 543 return 1; 544 } 545 546 547 /* XXX ELIMINATE sendpkt similar in ntpq.c, ntpdc.c, ntp_io.c, ntptrace.c */ 548 /* 549 * sendpkt - send a packet to the remote host 550 */ 551 static int 552 sendpkt( 553 void * xdata, 554 size_t xdatalen 555 ) 556 { 557 if (send(sockfd, xdata, xdatalen, 0) == -1) { 558 warning("write to %s failed", currenthost); 559 return -1; 560 } 561 562 return 0; 563 } 564 565 566 /* 567 * growpktdata - grow the packet data area 568 */ 569 static void 570 growpktdata(void) 571 { 572 size_t priorsz; 573 574 priorsz = (size_t)pktdatasize; 575 pktdatasize += INCDATASIZE; 576 pktdata = erealloc_zero(pktdata, (size_t)pktdatasize, priorsz); 577 } 578 579 580 /* 581 * getresponse - get a (series of) response packet(s) and return the data 582 */ 583 static int 584 getresponse( 585 int implcode, 586 int reqcode, 587 size_t *ritems, 588 size_t *rsize, 589 const char **rdata, 590 size_t esize 591 ) 592 { 593 struct resp_pkt rpkt; 594 struct sock_timeval tvo; 595 size_t items; 596 size_t i; 597 size_t size; 598 size_t datasize; 599 char *datap; 600 char *tmp_data; 601 char haveseq[MAXSEQ+1]; 602 int firstpkt; 603 int lastseq; 604 int numrecv; 605 int seq; 606 fd_set fds; 607 ssize_t n; 608 size_t pad; 609 610 /* 611 * This is pretty tricky. We may get between 1 and many packets 612 * back in response to the request. We peel the data out of 613 * each packet and collect it in one long block. When the last 614 * packet in the sequence is received we'll know how many we 615 * should have had. Note we use one long time out, should reconsider. 616 */ 617 *ritems = 0; 618 *rsize = 0; 619 firstpkt = 1; 620 numrecv = 0; 621 *rdata = datap = pktdata; 622 lastseq = 999; /* too big to be a sequence number */ 623 ZERO(haveseq); 624 FD_ZERO(&fds); 625 626 again: 627 if (firstpkt) 628 tvo = tvout; 629 else 630 tvo = tvsout; 631 632 FD_SET(sockfd, &fds); 633 n = select(sockfd+1, &fds, NULL, NULL, &tvo); 634 if (n == -1) { 635 warning("select fails"); 636 return -1; 637 } 638 if (n == 0) { 639 /* 640 * Timed out. Return what we have 641 */ 642 if (firstpkt) { 643 (void) fprintf(stderr, 644 "%s: timed out, nothing received\n", 645 currenthost); 646 return ERR_TIMEOUT; 647 } else { 648 (void) fprintf(stderr, 649 "%s: timed out with incomplete data\n", 650 currenthost); 651 if (debug) { 652 printf("Received sequence numbers"); 653 for (n = 0; n <= MAXSEQ; n++) 654 if (haveseq[n]) 655 printf(" %zd,", n); 656 if (lastseq != 999) 657 printf(" last frame received\n"); 658 else 659 printf(" last frame not received\n"); 660 } 661 return ERR_INCOMPLETE; 662 } 663 } 664 665 n = recv(sockfd, (char *)&rpkt, sizeof(rpkt), 0); 666 if (n == -1) { 667 warning("read"); 668 return -1; 669 } 670 671 672 /* 673 * Check for format errors. Bug proofing. 674 */ 675 if (n < (ssize_t)RESP_HEADER_SIZE) { 676 if (debug) 677 printf("Short (%zd byte) packet received\n", n); 678 goto again; 679 } 680 if (INFO_VERSION(rpkt.rm_vn_mode) > NTP_VERSION || 681 INFO_VERSION(rpkt.rm_vn_mode) < NTP_OLDVERSION) { 682 if (debug) 683 printf("Packet received with version %d\n", 684 INFO_VERSION(rpkt.rm_vn_mode)); 685 goto again; 686 } 687 if (INFO_MODE(rpkt.rm_vn_mode) != MODE_PRIVATE) { 688 if (debug) 689 printf("Packet received with mode %d\n", 690 INFO_MODE(rpkt.rm_vn_mode)); 691 goto again; 692 } 693 if (INFO_IS_AUTH(rpkt.auth_seq)) { 694 if (debug) 695 printf("Encrypted packet received\n"); 696 goto again; 697 } 698 if (!ISRESPONSE(rpkt.rm_vn_mode)) { 699 if (debug) 700 printf("Received request packet, wanted response\n"); 701 goto again; 702 } 703 if (INFO_MBZ(rpkt.mbz_itemsize) != 0) { 704 if (debug) 705 printf("Received packet with nonzero MBZ field!\n"); 706 goto again; 707 } 708 709 /* 710 * Check implementation/request. Could be old data getting to us. 711 */ 712 if (rpkt.implementation != implcode || rpkt.request != reqcode) { 713 if (debug) 714 printf( 715 "Received implementation/request of %d/%d, wanted %d/%d", 716 rpkt.implementation, rpkt.request, 717 implcode, reqcode); 718 goto again; 719 } 720 721 /* 722 * Check the error code. If non-zero, return it. 723 */ 724 if (INFO_ERR(rpkt.err_nitems) != INFO_OKAY) { 725 if (debug && ISMORE(rpkt.rm_vn_mode)) { 726 printf("Error code %d received on not-final packet\n", 727 INFO_ERR(rpkt.err_nitems)); 728 } 729 return (int)INFO_ERR(rpkt.err_nitems); 730 } 731 732 /* 733 * Collect items and size. Make sure they make sense. 734 */ 735 items = INFO_NITEMS(rpkt.err_nitems); 736 size = INFO_ITEMSIZE(rpkt.mbz_itemsize); 737 if (esize > size) 738 pad = esize - size; 739 else 740 pad = 0; 741 datasize = items * size; 742 if ((size_t)datasize > (n-RESP_HEADER_SIZE)) { 743 if (debug) 744 printf( 745 "Received items %zu, size %zu (total %zu), data in packet is %zu\n", 746 items, size, datasize, n-RESP_HEADER_SIZE); 747 goto again; 748 } 749 750 /* 751 * If this isn't our first packet, make sure the size matches 752 * the other ones. 753 */ 754 if (!firstpkt && size != *rsize) { 755 if (debug) 756 printf("Received itemsize %zu, previous %zu\n", 757 size, *rsize); 758 goto again; 759 } 760 /* 761 * If we've received this before, +toss it 762 */ 763 seq = INFO_SEQ(rpkt.auth_seq); 764 if (haveseq[seq]) { 765 if (debug) 766 printf("Received duplicate sequence number %d\n", seq); 767 goto again; 768 } 769 haveseq[seq] = 1; 770 771 /* 772 * If this is the last in the sequence, record that. 773 */ 774 if (!ISMORE(rpkt.rm_vn_mode)) { 775 if (lastseq != 999) { 776 printf("Received second end sequence packet\n"); 777 goto again; 778 } 779 lastseq = seq; 780 } 781 782 /* 783 * So far, so good. Copy this data into the output array. 784 */ 785 if ((datap + datasize + (pad * items)) > (pktdata + pktdatasize)) { 786 size_t offset = datap - pktdata; 787 growpktdata(); 788 *rdata = pktdata; /* might have been realloced ! */ 789 datap = pktdata + offset; 790 } 791 /* 792 * We now move the pointer along according to size and number of 793 * items. This is so we can play nice with older implementations 794 */ 795 796 tmp_data = rpkt.u.data; 797 for (i = 0; i < items; i++) { 798 memcpy(datap, tmp_data, (unsigned)size); 799 tmp_data += size; 800 zero_mem(datap + size, pad); 801 datap += size + pad; 802 } 803 804 if (firstpkt) { 805 firstpkt = 0; 806 *rsize = size + pad; 807 } 808 *ritems += items; 809 810 /* 811 * Finally, check the count of received packets. If we've got them 812 * all, return 813 */ 814 ++numrecv; 815 if (numrecv <= lastseq) 816 goto again; 817 return INFO_OKAY; 818 } 819 820 821 /* 822 * sendrequest - format and send a request packet 823 * 824 * Historically, ntpdc has used a fixed-size request packet regardless 825 * of the actual payload size. When authenticating, the timestamp, key 826 * ID, and digest have been placed just before the end of the packet. 827 * With the introduction in late 2009 of support for authenticated 828 * ntpdc requests using larger 20-octet digests (vs. 16 for MD5), we 829 * come up four bytes short. 830 * 831 * To maintain interop while allowing for larger digests, the behavior 832 * is unchanged when using 16-octet digests. For larger digests, the 833 * timestamp, key ID, and digest are placed immediately following the 834 * request payload, with the overall packet size variable. ntpd can 835 * distinguish 16-octet digests by the overall request size being 836 * REQ_LEN_NOMAC + 4 + 16 with the auth bit enabled. When using a 837 * longer digest, that request size should be avoided. 838 * 839 * With the form used with 20-octet and larger digests, the timestamp, 840 * key ID, and digest are located by ntpd relative to the start of the 841 * packet, and the size of the digest is then implied by the packet 842 * size. 843 */ 844 static int 845 sendrequest( 846 int implcode, 847 int reqcode, 848 int auth, 849 size_t qitems, 850 size_t qsize, 851 const char *qdata 852 ) 853 { 854 struct req_pkt qpkt; 855 size_t datasize; 856 size_t reqsize; 857 u_long key_id; 858 l_fp ts; 859 l_fp * ptstamp; 860 size_t maclen; 861 char * pass; 862 863 ZERO(qpkt); 864 qpkt.rm_vn_mode = RM_VN_MODE(0, 0, 0); 865 qpkt.implementation = (u_char)implcode; 866 qpkt.request = (u_char)reqcode; 867 868 datasize = qitems * qsize; 869 if (datasize && qdata != NULL) { 870 memcpy(qpkt.u.data, qdata, datasize); 871 qpkt.err_nitems = ERR_NITEMS(0, qitems); 872 qpkt.mbz_itemsize = MBZ_ITEMSIZE(qsize); 873 } else { 874 qpkt.err_nitems = ERR_NITEMS(0, 0); 875 qpkt.mbz_itemsize = MBZ_ITEMSIZE(qsize); /* allow for optional first item */ 876 } 877 878 if (!auth || (keyid_entered && info_auth_keyid == 0)) { 879 qpkt.auth_seq = AUTH_SEQ(0, 0); 880 return sendpkt(&qpkt, req_pkt_size); 881 } 882 883 if (info_auth_keyid == 0) { 884 key_id = getkeyid("Keyid: "); 885 if (!key_id) { 886 fprintf(stderr, "Invalid key identifier\n"); 887 return 1; 888 } 889 info_auth_keyid = key_id; 890 } 891 if (!authistrusted(info_auth_keyid)) { 892 pass = getpass_keytype(info_auth_keytype); 893 if ('\0' == pass[0]) { 894 fprintf(stderr, "Invalid password\n"); 895 return 1; 896 } 897 authusekey(info_auth_keyid, info_auth_keytype, 898 (u_char *)pass); 899 authtrust(info_auth_keyid, 1); 900 } 901 qpkt.auth_seq = AUTH_SEQ(1, 0); 902 if (info_auth_hashlen > 16) { 903 /* 904 * Only ntpd which expects REQ_LEN_NOMAC plus maclen 905 * octets in an authenticated request using a 16 octet 906 * digest (that is, a newer ntpd) will handle digests 907 * larger than 16 octets, so for longer digests, do 908 * not attempt to shorten the requests for downlevel 909 * ntpd compatibility. 910 */ 911 if (REQ_LEN_NOMAC != req_pkt_size) 912 return 1; 913 reqsize = REQ_LEN_HDR + datasize + sizeof(*ptstamp); 914 /* align to 32 bits */ 915 reqsize = (reqsize + 3) & ~3; 916 } else 917 reqsize = req_pkt_size; 918 ptstamp = (void *)((char *)&qpkt + reqsize); 919 ptstamp--; 920 get_systime(&ts); 921 L_ADD(&ts, &delay_time); 922 HTONL_FP(&ts, ptstamp); 923 maclen = authencrypt( 924 info_auth_keyid, (void *)&qpkt, size2int_chk(reqsize)); 925 if (!maclen) { 926 fprintf(stderr, "Key not found\n"); 927 return 1; 928 } else if (maclen != (int)(info_auth_hashlen + sizeof(keyid_t))) { 929 fprintf(stderr, 930 "%zu octet MAC, %zu expected with %zu octet digest\n", 931 maclen, (info_auth_hashlen + sizeof(keyid_t)), 932 info_auth_hashlen); 933 return 1; 934 } 935 return sendpkt(&qpkt, reqsize + maclen); 936 } 937 938 939 /* 940 * doquery - send a request and process the response 941 */ 942 int 943 doquery( 944 int implcode, 945 int reqcode, 946 int auth, 947 size_t qitems, 948 size_t qsize, 949 const char *qdata, 950 size_t *ritems, 951 size_t *rsize, 952 const char **rdata, 953 int quiet_mask, 954 int esize 955 ) 956 { 957 int res; 958 char junk[512]; 959 fd_set fds; 960 struct sock_timeval tvzero; 961 962 /* 963 * Check to make sure host is open 964 */ 965 if (!havehost) { 966 (void) fprintf(stderr, "***No host open, use `host' command\n"); 967 return -1; 968 } 969 970 /* 971 * Poll the socket and clear out any pending data 972 */ 973 again: 974 do { 975 tvzero.tv_sec = tvzero.tv_usec = 0; 976 FD_ZERO(&fds); 977 FD_SET(sockfd, &fds); 978 res = select(sockfd+1, &fds, NULL, NULL, &tvzero); 979 if (res == -1) { 980 warning("polling select"); 981 return -1; 982 } else if (res > 0) 983 984 (void) recv(sockfd, junk, sizeof junk, 0); 985 } while (res > 0); 986 987 988 /* 989 * send a request 990 */ 991 res = sendrequest(implcode, reqcode, auth, qitems, qsize, qdata); 992 if (res != 0) 993 return res; 994 995 /* 996 * Get the response. If we got a standard error, print a message 997 */ 998 res = getresponse(implcode, reqcode, ritems, rsize, rdata, esize); 999 1000 /* 1001 * Try to be compatible with older implementations of ntpd. 1002 */ 1003 if (res == INFO_ERR_FMT && req_pkt_size != 48) { 1004 int oldsize; 1005 1006 oldsize = req_pkt_size; 1007 1008 switch(req_pkt_size) { 1009 case REQ_LEN_NOMAC: 1010 req_pkt_size = 160; 1011 break; 1012 case 160: 1013 req_pkt_size = 48; 1014 break; 1015 } 1016 if (impl_ver == IMPL_XNTPD) { 1017 fprintf(stderr, 1018 "***Warning changing to older implementation\n"); 1019 return INFO_ERR_IMPL; 1020 } 1021 1022 fprintf(stderr, 1023 "***Warning changing the request packet size from %d to %d\n", 1024 oldsize, req_pkt_size); 1025 goto again; 1026 } 1027 1028 /* log error message if not told to be quiet */ 1029 if ((res > 0) && (((1 << res) & quiet_mask) == 0)) { 1030 switch(res) { 1031 case INFO_ERR_IMPL: 1032 /* Give us a chance to try the older implementation. */ 1033 if (implcode == IMPL_XNTPD) 1034 break; 1035 (void) fprintf(stderr, 1036 "***Server implementation incompatible with our own\n"); 1037 break; 1038 case INFO_ERR_REQ: 1039 (void) fprintf(stderr, 1040 "***Server doesn't implement this request\n"); 1041 break; 1042 case INFO_ERR_FMT: 1043 (void) fprintf(stderr, 1044 "***Server reports a format error in the received packet (shouldn't happen)\n"); 1045 break; 1046 case INFO_ERR_NODATA: 1047 (void) fprintf(stderr, 1048 "***Server reports data not found\n"); 1049 break; 1050 case INFO_ERR_AUTH: 1051 (void) fprintf(stderr, "***Permission denied\n"); 1052 break; 1053 case ERR_TIMEOUT: 1054 (void) fprintf(stderr, "***Request timed out\n"); 1055 break; 1056 case ERR_INCOMPLETE: 1057 (void) fprintf(stderr, 1058 "***Response from server was incomplete\n"); 1059 break; 1060 default: 1061 (void) fprintf(stderr, 1062 "***Server returns unknown error code %d\n", res); 1063 break; 1064 } 1065 } 1066 return res; 1067 } 1068 1069 1070 /* 1071 * getcmds - read commands from the standard input and execute them 1072 */ 1073 static void 1074 getcmds(void) 1075 { 1076 char * line; 1077 int count; 1078 1079 ntp_readline_init(interactive ? prompt : NULL); 1080 1081 for (;;) { 1082 line = ntp_readline(&count); 1083 if (NULL == line) 1084 break; 1085 docmd(line); 1086 free(line); 1087 } 1088 1089 ntp_readline_uninit(); 1090 } 1091 1092 1093 #ifndef SYS_WINNT /* Under NT cannot handle SIGINT, WIN32 spawns a handler */ 1094 /* 1095 * abortcmd - catch interrupts and abort the current command 1096 */ 1097 static RETSIGTYPE 1098 abortcmd( 1099 int sig 1100 ) 1101 { 1102 1103 if (current_output == stdout) 1104 (void) fflush(stdout); 1105 putc('\n', stderr); 1106 (void) fflush(stderr); 1107 if (jump) longjmp(interrupt_buf, 1); 1108 } 1109 #endif /* SYS_WINNT */ 1110 1111 /* 1112 * docmd - decode the command line and execute a command 1113 */ 1114 static void 1115 docmd( 1116 const char *cmdline 1117 ) 1118 { 1119 char *tokens[1+MAXARGS+MOREARGS+2]; 1120 struct parse pcmd; 1121 int ntok; 1122 int i, ti; 1123 int rval; 1124 struct xcmd *xcmd; 1125 1126 ai_fam_templ = ai_fam_default; 1127 /* 1128 * Tokenize the command line. If nothing on it, return. 1129 */ 1130 if (strlen(cmdline) >= MAXLINE) { 1131 fprintf(stderr, "***Command ignored, more than %d characters:\n%s\n", 1132 MAXLINE - 1, cmdline); 1133 return; 1134 } 1135 tokenize(cmdline, tokens, &ntok); 1136 if (ntok == 0) 1137 return; 1138 1139 /* 1140 * Find the appropriate command description. 1141 */ 1142 i = findcmd(tokens[0], builtins, opcmds, &xcmd); 1143 if (i == 0) { 1144 (void) fprintf(stderr, "***Command `%s' unknown\n", 1145 tokens[0]); 1146 return; 1147 } else if (i >= 2) { 1148 (void) fprintf(stderr, "***Command `%s' ambiguous\n", 1149 tokens[0]); 1150 return; 1151 } 1152 1153 /* 1154 * Save the keyword, then walk through the arguments, interpreting 1155 * as we go. 1156 */ 1157 pcmd.keyword = tokens[0]; 1158 pcmd.nargs = 0; 1159 ti = 1; 1160 for (i = 0; i < MAXARGS && xcmd->arg[i] != NO;) { 1161 if ((i+ti) >= ntok) { 1162 if (!(xcmd->arg[i] & OPT)) { 1163 printusage(xcmd, stderr); 1164 return; 1165 } 1166 break; 1167 } 1168 if ((xcmd->arg[i] & OPT) && (*tokens[i+ti] == '>')) 1169 break; 1170 rval = getarg(tokens[i+ti], (int)xcmd->arg[i], &pcmd.argval[i]); 1171 if (rval == -1) { 1172 ti++; 1173 continue; 1174 } 1175 if (rval == 0) 1176 return; 1177 pcmd.nargs++; 1178 i++; 1179 } 1180 1181 /* Any extra args are assumed to be "OPT|NTP_STR". */ 1182 for ( ; i < MAXARGS + MOREARGS;) { 1183 if ((i+ti) >= ntok) 1184 break; 1185 rval = getarg(tokens[i+ti], (int)(OPT|NTP_STR), &pcmd.argval[i]); 1186 if (rval == -1) { 1187 ti++; 1188 continue; 1189 } 1190 if (rval == 0) 1191 return; 1192 pcmd.nargs++; 1193 i++; 1194 } 1195 1196 i += ti; 1197 if (i < ntok && *tokens[i] == '>') { 1198 char *fname; 1199 1200 if (*(tokens[i]+1) != '\0') 1201 fname = tokens[i]+1; 1202 else if ((i+1) < ntok) 1203 fname = tokens[i+1]; 1204 else { 1205 (void) fprintf(stderr, "***No file for redirect\n"); 1206 return; 1207 } 1208 1209 current_output = fopen(fname, "w"); 1210 if (current_output == NULL) { 1211 (void) fprintf(stderr, "***Error opening %s: ", fname); 1212 perror(""); 1213 return; 1214 } 1215 } else { 1216 current_output = stdout; 1217 } 1218 1219 if (interactive && setjmp(interrupt_buf)) { 1220 return; 1221 } else { 1222 jump = 1; 1223 (xcmd->handler)(&pcmd, current_output); 1224 jump = 0; 1225 if (current_output != stdout) 1226 (void) fclose(current_output); 1227 current_output = NULL; 1228 } 1229 } 1230 1231 1232 /* 1233 * tokenize - turn a command line into tokens 1234 */ 1235 static void 1236 tokenize( 1237 const char *line, 1238 char **tokens, 1239 int *ntok 1240 ) 1241 { 1242 register const char *cp; 1243 register char *sp; 1244 static char tspace[MAXLINE]; 1245 1246 sp = tspace; 1247 cp = line; 1248 for (*ntok = 0; *ntok < MAXTOKENS; (*ntok)++) { 1249 tokens[*ntok] = sp; 1250 while (ISSPACE(*cp)) 1251 cp++; 1252 if (ISEOL(*cp)) 1253 break; 1254 do { 1255 *sp++ = *cp++; 1256 } while (!ISSPACE(*cp) && !ISEOL(*cp)); 1257 1258 *sp++ = '\0'; 1259 } 1260 } 1261 1262 1263 1264 /* 1265 * findcmd - find a command in a command description table 1266 */ 1267 static int 1268 findcmd( 1269 register char *str, 1270 struct xcmd *clist1, 1271 struct xcmd *clist2, 1272 struct xcmd **cmd 1273 ) 1274 { 1275 register struct xcmd *cl; 1276 size_t clen; 1277 int nmatch; 1278 struct xcmd *nearmatch = NULL; 1279 struct xcmd *clist; 1280 1281 clen = strlen(str); 1282 nmatch = 0; 1283 if (clist1 != 0) 1284 clist = clist1; 1285 else if (clist2 != 0) 1286 clist = clist2; 1287 else 1288 return 0; 1289 1290 again: 1291 for (cl = clist; cl->keyword != 0; cl++) { 1292 /* do a first character check, for efficiency */ 1293 if (*str != *(cl->keyword)) 1294 continue; 1295 if (strncmp(str, cl->keyword, (unsigned)clen) == 0) { 1296 /* 1297 * Could be extact match, could be approximate. 1298 * Is exact if the length of the keyword is the 1299 * same as the str. 1300 */ 1301 if (*((cl->keyword) + clen) == '\0') { 1302 *cmd = cl; 1303 return 1; 1304 } 1305 nmatch++; 1306 nearmatch = cl; 1307 } 1308 } 1309 1310 /* 1311 * See if there is more to do. If so, go again. Sorry about the 1312 * goto, too much looking at BSD sources... 1313 */ 1314 if (clist == clist1 && clist2 != 0) { 1315 clist = clist2; 1316 goto again; 1317 } 1318 1319 /* 1320 * If we got extactly 1 near match, use it, else return number 1321 * of matches. 1322 */ 1323 if (nmatch == 1) { 1324 *cmd = nearmatch; 1325 return 1; 1326 } 1327 return nmatch; 1328 } 1329 1330 1331 /* 1332 * getarg - interpret an argument token 1333 * 1334 * string is always set. 1335 * type is set to the decoded type. 1336 * 1337 * return: 0 - failure 1338 * 1 - success 1339 * -1 - skip to next token 1340 */ 1341 static int 1342 getarg( 1343 char *str, 1344 int code, 1345 arg_v *argp 1346 ) 1347 { 1348 int isneg; 1349 char *cp, *np; 1350 static const char *digits = "0123456789"; 1351 1352 ZERO(*argp); 1353 argp->string = str; 1354 argp->type = code & ~OPT; 1355 1356 switch (argp->type) { 1357 case NTP_STR: 1358 break; 1359 case NTP_ADD: 1360 if (!strcmp("-6", str)) { 1361 ai_fam_templ = AF_INET6; 1362 return -1; 1363 } else if (!strcmp("-4", str)) { 1364 ai_fam_templ = AF_INET; 1365 return -1; 1366 } 1367 if (!getnetnum(str, &(argp->netnum), (char *)0, 0)) { 1368 return 0; 1369 } 1370 break; 1371 case NTP_INT: 1372 case NTP_UINT: 1373 isneg = 0; 1374 np = str; 1375 if (*np == '-') { 1376 np++; 1377 isneg = 1; 1378 } 1379 1380 argp->uval = 0; 1381 do { 1382 cp = strchr(digits, *np); 1383 if (cp == NULL) { 1384 (void) fprintf(stderr, 1385 "***Illegal integer value %s\n", str); 1386 return 0; 1387 } 1388 argp->uval *= 10; 1389 argp->uval += (u_long)(cp - digits); 1390 } while (*(++np) != '\0'); 1391 1392 if (isneg) { 1393 if ((code & ~OPT) == NTP_UINT) { 1394 (void) fprintf(stderr, 1395 "***Value %s should be unsigned\n", str); 1396 return 0; 1397 } 1398 argp->ival = -argp->ival; 1399 } 1400 break; 1401 case IP_VERSION: 1402 if (!strcmp("-6", str)) 1403 argp->ival = 6 ; 1404 else if (!strcmp("-4", str)) 1405 argp->ival = 4 ; 1406 else { 1407 (void) fprintf(stderr, 1408 "***Version must be either 4 or 6\n"); 1409 return 0; 1410 } 1411 break; 1412 } 1413 1414 return 1; 1415 } 1416 1417 1418 /* 1419 * getnetnum - given a host name, return its net number 1420 * and (optional) full name 1421 */ 1422 static int 1423 getnetnum( 1424 const char *hname, 1425 sockaddr_u *num, 1426 char *fullhost, 1427 int af 1428 ) 1429 { 1430 struct addrinfo hints, *ai = NULL; 1431 1432 ZERO(hints); 1433 hints.ai_flags = AI_CANONNAME; 1434 #ifdef AI_ADDRCONFIG 1435 hints.ai_flags |= AI_ADDRCONFIG; 1436 #endif 1437 1438 /* 1439 * decodenetnum only works with addresses, but handles syntax 1440 * that getaddrinfo doesn't: [2001::1]:1234 1441 */ 1442 if (decodenetnum(hname, num)) { 1443 if (fullhost != NULL) 1444 getnameinfo(&num->sa, SOCKLEN(num), fullhost, 1445 LENHOSTNAME, NULL, 0, 0); 1446 return 1; 1447 } else if (getaddrinfo(hname, "ntp", &hints, &ai) == 0) { 1448 INSIST(sizeof(*num) >= ai->ai_addrlen); 1449 memcpy(num, ai->ai_addr, ai->ai_addrlen); 1450 if (fullhost != NULL) { 1451 if (ai->ai_canonname != NULL) 1452 strlcpy(fullhost, ai->ai_canonname, 1453 LENHOSTNAME); 1454 else 1455 getnameinfo(&num->sa, SOCKLEN(num), 1456 fullhost, LENHOSTNAME, NULL, 1457 0, 0); 1458 } 1459 return 1; 1460 } 1461 fprintf(stderr, "***Can't find host %s\n", hname); 1462 1463 return 0; 1464 } 1465 1466 1467 /* 1468 * nntohost - convert network number to host name. This routine enforces 1469 * the showhostnames setting. 1470 */ 1471 const char * 1472 nntohost( 1473 sockaddr_u *netnum 1474 ) 1475 { 1476 if (!showhostnames || SOCK_UNSPEC(netnum)) 1477 return stoa(netnum); 1478 else if (ISREFCLOCKADR(netnum)) 1479 return refnumtoa(netnum); 1480 else 1481 return socktohost(netnum); 1482 } 1483 1484 1485 /* 1486 * Finally, the built in command handlers 1487 */ 1488 1489 /* 1490 * help - tell about commands, or details of a particular command 1491 */ 1492 static void 1493 help( 1494 struct parse *pcmd, 1495 FILE *fp 1496 ) 1497 { 1498 struct xcmd *xcp; 1499 char *cmd; 1500 const char *list[100]; 1501 size_t word, words; 1502 size_t row, rows; 1503 size_t col, cols; 1504 size_t length; 1505 1506 if (pcmd->nargs == 0) { 1507 words = 0; 1508 for (xcp = builtins; xcp->keyword != 0; xcp++) { 1509 if (*(xcp->keyword) != '?') 1510 list[words++] = xcp->keyword; 1511 } 1512 for (xcp = opcmds; xcp->keyword != 0; xcp++) 1513 list[words++] = xcp->keyword; 1514 1515 qsort((void *)list, words, sizeof(list[0]), helpsort); 1516 col = 0; 1517 for (word = 0; word < words; word++) { 1518 length = strlen(list[word]); 1519 col = max(col, length); 1520 } 1521 1522 cols = SCREENWIDTH / ++col; 1523 rows = (words + cols - 1) / cols; 1524 1525 fprintf(fp, "ntpdc commands:\n"); 1526 1527 for (row = 0; row < rows; row++) { 1528 for (word = row; word < words; word += rows) 1529 fprintf(fp, "%-*.*s", (int)col, 1530 (int)col - 1, list[word]); 1531 fprintf(fp, "\n"); 1532 } 1533 } else { 1534 cmd = pcmd->argval[0].string; 1535 words = findcmd(cmd, builtins, opcmds, &xcp); 1536 if (words == 0) { 1537 fprintf(stderr, 1538 "Command `%s' is unknown\n", cmd); 1539 return; 1540 } else if (words >= 2) { 1541 fprintf(stderr, 1542 "Command `%s' is ambiguous\n", cmd); 1543 return; 1544 } 1545 fprintf(fp, "function: %s\n", xcp->comment); 1546 printusage(xcp, fp); 1547 } 1548 } 1549 1550 1551 /* 1552 * helpsort - do hostname qsort comparisons 1553 */ 1554 static int 1555 helpsort( 1556 const void *t1, 1557 const void *t2 1558 ) 1559 { 1560 const char * const * name1 = t1; 1561 const char * const * name2 = t2; 1562 1563 return strcmp(*name1, *name2); 1564 } 1565 1566 1567 /* 1568 * printusage - print usage information for a command 1569 */ 1570 static void 1571 printusage( 1572 struct xcmd *xcp, 1573 FILE *fp 1574 ) 1575 { 1576 int i, opt46; 1577 1578 opt46 = 0; 1579 (void) fprintf(fp, "usage: %s", xcp->keyword); 1580 for (i = 0; i < MAXARGS && xcp->arg[i] != NO; i++) { 1581 if (opt46 == 0 && (xcp->arg[i] & ~OPT) == NTP_ADD) { 1582 (void) fprintf(fp, " [ -4|-6 ]"); 1583 opt46 = 1; 1584 } 1585 if (xcp->arg[i] & OPT) 1586 (void) fprintf(fp, " [ %s ]", xcp->desc[i]); 1587 else 1588 (void) fprintf(fp, " %s", xcp->desc[i]); 1589 } 1590 (void) fprintf(fp, "\n"); 1591 } 1592 1593 1594 /* 1595 * timeout - set time out time 1596 */ 1597 static void 1598 timeout( 1599 struct parse *pcmd, 1600 FILE *fp 1601 ) 1602 { 1603 int val; 1604 1605 if (pcmd->nargs == 0) { 1606 val = tvout.tv_sec * 1000 + tvout.tv_usec / 1000; 1607 (void) fprintf(fp, "primary timeout %d ms\n", val); 1608 } else { 1609 tvout.tv_sec = pcmd->argval[0].uval / 1000; 1610 tvout.tv_usec = (pcmd->argval[0].uval - (tvout.tv_sec * 1000)) 1611 * 1000; 1612 } 1613 } 1614 1615 1616 /* 1617 * my_delay - set delay for auth requests 1618 */ 1619 static void 1620 my_delay( 1621 struct parse *pcmd, 1622 FILE *fp 1623 ) 1624 { 1625 int isneg; 1626 u_long val; 1627 1628 if (pcmd->nargs == 0) { 1629 val = delay_time.l_ui * 1000 + delay_time.l_uf / 4294967; 1630 (void) fprintf(fp, "delay %lu ms\n", val); 1631 } else { 1632 if (pcmd->argval[0].ival < 0) { 1633 isneg = 1; 1634 val = (u_long)(-pcmd->argval[0].ival); 1635 } else { 1636 isneg = 0; 1637 val = (u_long)pcmd->argval[0].ival; 1638 } 1639 1640 delay_time.l_ui = val / 1000; 1641 val %= 1000; 1642 delay_time.l_uf = val * 4294967; /* 2**32/1000 */ 1643 1644 if (isneg) 1645 L_NEG(&delay_time); 1646 } 1647 } 1648 1649 1650 /* 1651 * host - set the host we are dealing with. 1652 */ 1653 static void 1654 host( 1655 struct parse *pcmd, 1656 FILE *fp 1657 ) 1658 { 1659 int i; 1660 1661 if (pcmd->nargs == 0) { 1662 if (havehost) 1663 (void) fprintf(fp, "current host is %s\n", currenthost); 1664 else 1665 (void) fprintf(fp, "no current host\n"); 1666 return; 1667 } 1668 1669 i = 0; 1670 if (pcmd->nargs == 2) { 1671 if (!strcmp("-4", pcmd->argval[i].string)) 1672 ai_fam_templ = AF_INET; 1673 else if (!strcmp("-6", pcmd->argval[i].string)) 1674 ai_fam_templ = AF_INET6; 1675 else { 1676 if (havehost) 1677 (void) fprintf(fp, 1678 "current host remains %s\n", currenthost); 1679 else 1680 (void) fprintf(fp, "still no current host\n"); 1681 return; 1682 } 1683 i = 1; 1684 } 1685 if (openhost(pcmd->argval[i].string)) { 1686 (void) fprintf(fp, "current host set to %s\n", currenthost); 1687 } else { 1688 if (havehost) 1689 (void) fprintf(fp, 1690 "current host remains %s\n", currenthost); 1691 else 1692 (void) fprintf(fp, "still no current host\n"); 1693 } 1694 } 1695 1696 1697 /* 1698 * keyid - get a keyid to use for authenticating requests 1699 */ 1700 static void 1701 keyid( 1702 struct parse *pcmd, 1703 FILE *fp 1704 ) 1705 { 1706 if (pcmd->nargs == 0) { 1707 if (info_auth_keyid == 0 && !keyid_entered) 1708 (void) fprintf(fp, "no keyid defined\n"); 1709 else if (info_auth_keyid == 0 && keyid_entered) 1710 (void) fprintf(fp, "no keyid will be sent\n"); 1711 else 1712 (void) fprintf(fp, "keyid is %lu\n", (u_long)info_auth_keyid); 1713 } else { 1714 info_auth_keyid = pcmd->argval[0].uval; 1715 keyid_entered = 1; 1716 } 1717 } 1718 1719 1720 /* 1721 * keytype - get type of key to use for authenticating requests 1722 */ 1723 static void 1724 keytype( 1725 struct parse *pcmd, 1726 FILE *fp 1727 ) 1728 { 1729 const char * digest_name; 1730 size_t digest_len; 1731 int key_type; 1732 1733 if (!pcmd->nargs) { 1734 fprintf(fp, "keytype is %s with %lu octet digests\n", 1735 keytype_name(info_auth_keytype), 1736 (u_long)info_auth_hashlen); 1737 return; 1738 } 1739 1740 digest_name = pcmd->argval[0].string; 1741 digest_len = 0; 1742 key_type = keytype_from_text(digest_name, &digest_len); 1743 1744 if (!key_type) { 1745 fprintf(fp, "keytype must be 'md5'%s\n", 1746 #ifdef OPENSSL 1747 " or a digest type provided by OpenSSL"); 1748 #else 1749 ""); 1750 #endif 1751 return; 1752 } 1753 1754 info_auth_keytype = key_type; 1755 info_auth_hashlen = digest_len; 1756 } 1757 1758 1759 /* 1760 * passwd - get an authentication key 1761 */ 1762 /*ARGSUSED*/ 1763 static void 1764 passwd( 1765 struct parse *pcmd, 1766 FILE *fp 1767 ) 1768 { 1769 char *pass; 1770 1771 if (info_auth_keyid == 0) { 1772 info_auth_keyid = getkeyid("Keyid: "); 1773 if (info_auth_keyid == 0) { 1774 (void)fprintf(fp, "Keyid must be defined\n"); 1775 return; 1776 } 1777 } 1778 if (pcmd->nargs >= 1) 1779 pass = pcmd->argval[0].string; 1780 else { 1781 pass = getpass_keytype(info_auth_keytype); 1782 if ('\0' == *pass) { 1783 fprintf(fp, "Password unchanged\n"); 1784 return; 1785 } 1786 } 1787 authusekey(info_auth_keyid, info_auth_keytype, (u_char *)pass); 1788 authtrust(info_auth_keyid, 1); 1789 } 1790 1791 1792 /* 1793 * hostnames - set the showhostnames flag 1794 */ 1795 static void 1796 hostnames( 1797 struct parse *pcmd, 1798 FILE *fp 1799 ) 1800 { 1801 if (pcmd->nargs == 0) { 1802 if (showhostnames) 1803 (void) fprintf(fp, "hostnames being shown\n"); 1804 else 1805 (void) fprintf(fp, "hostnames not being shown\n"); 1806 } else { 1807 if (STREQ(pcmd->argval[0].string, "yes")) 1808 showhostnames = 1; 1809 else if (STREQ(pcmd->argval[0].string, "no")) 1810 showhostnames = 0; 1811 else 1812 (void)fprintf(stderr, "What?\n"); 1813 } 1814 } 1815 1816 1817 /* 1818 * setdebug - set/change debugging level 1819 */ 1820 static void 1821 setdebug( 1822 struct parse *pcmd, 1823 FILE *fp 1824 ) 1825 { 1826 if (pcmd->nargs == 0) { 1827 (void) fprintf(fp, "debug level is %d\n", debug); 1828 return; 1829 } else if (STREQ(pcmd->argval[0].string, "no")) { 1830 debug = 0; 1831 } else if (STREQ(pcmd->argval[0].string, "more")) { 1832 debug++; 1833 } else if (STREQ(pcmd->argval[0].string, "less")) { 1834 debug--; 1835 } else { 1836 (void) fprintf(fp, "What?\n"); 1837 return; 1838 } 1839 (void) fprintf(fp, "debug level set to %d\n", debug); 1840 } 1841 1842 1843 /* 1844 * quit - stop this nonsense 1845 */ 1846 /*ARGSUSED*/ 1847 static void 1848 quit( 1849 struct parse *pcmd, 1850 FILE *fp 1851 ) 1852 { 1853 if (havehost) 1854 closesocket(sockfd); 1855 exit(0); 1856 } 1857 1858 1859 /* 1860 * version - print the current version number 1861 */ 1862 /*ARGSUSED*/ 1863 static void 1864 version( 1865 struct parse *pcmd, 1866 FILE *fp 1867 ) 1868 { 1869 1870 (void) fprintf(fp, "%s\n", Version); 1871 return; 1872 } 1873 1874 1875 static void __attribute__((__format__(__printf__, 1, 0))) 1876 vwarning(const char *fmt, va_list ap) 1877 { 1878 int serrno = errno; 1879 (void) fprintf(stderr, "%s: ", progname); 1880 vfprintf(stderr, fmt, ap); 1881 (void) fprintf(stderr, ": %s\n", strerror(serrno)); 1882 } 1883 1884 /* 1885 * warning - print a warning message 1886 */ 1887 static void __attribute__((__format__(__printf__, 1, 2))) 1888 warning( 1889 const char *fmt, 1890 ... 1891 ) 1892 { 1893 va_list ap; 1894 va_start(ap, fmt); 1895 vwarning(fmt, ap); 1896 va_end(ap); 1897 } 1898 1899 1900 /* 1901 * error - print a message and exit 1902 */ 1903 static void __attribute__((__format__(__printf__, 1, 2))) 1904 error( 1905 const char *fmt, 1906 ... 1907 ) 1908 { 1909 va_list ap; 1910 va_start(ap, fmt); 1911 vwarning(fmt, ap); 1912 va_end(ap); 1913 exit(1); 1914 } 1915 1916 /* 1917 * getkeyid - prompt the user for a keyid to use 1918 */ 1919 static u_long 1920 getkeyid( 1921 const char *keyprompt 1922 ) 1923 { 1924 int c; 1925 FILE *fi; 1926 char pbuf[20]; 1927 size_t i; 1928 size_t ilim; 1929 1930 #ifndef SYS_WINNT 1931 if ((fi = fdopen(open("/dev/tty", 2), "r")) == NULL) 1932 #else 1933 if ((fi = _fdopen(open("CONIN$", _O_TEXT), "r")) == NULL) 1934 #endif /* SYS_WINNT */ 1935 fi = stdin; 1936 else 1937 setbuf(fi, (char *)NULL); 1938 fprintf(stderr, "%s", keyprompt); fflush(stderr); 1939 for (i = 0, ilim = COUNTOF(pbuf) - 1; 1940 i < ilim && (c = getc(fi)) != '\n' && c != EOF; 1941 ) 1942 pbuf[i++] = (char)c; 1943 pbuf[i] = '\0'; 1944 if (fi != stdin) 1945 fclose(fi); 1946 1947 return (u_long) atoi(pbuf); 1948 } 1949