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