1 /* $NetBSD: ntpdc.c,v 1.18 2020/05/25 20:47:26 christos Exp $ */ 2 3 /* 4 * ntpdc - control and monitor your ntpd daemon 5 */ 6 #include <config.h> 7 #include <stdio.h> 8 #include <stddef.h> 9 #include <ctype.h> 10 #include <signal.h> 11 #include <setjmp.h> 12 #ifdef HAVE_UNISTD_H 13 # include <unistd.h> 14 #endif 15 #ifdef HAVE_FCNTL_H 16 # include <fcntl.h> 17 #endif 18 #ifdef SYS_WINNT 19 # include <mswsock.h> 20 #endif 21 #include <isc/net.h> 22 #include <isc/result.h> 23 24 #include "ntpdc.h" 25 #include "ntp_select.h" 26 #include "ntp_stdlib.h" 27 #include "ntp_assert.h" 28 #include "ntp_lineedit.h" 29 #ifdef OPENSSL 30 #include "openssl/evp.h" 31 #include "openssl/objects.h" 32 #endif 33 #include <ssl_applink.c> 34 35 #include "ntp_libopts.h" 36 #include "ntpdc-opts.h" 37 #include "safecast.h" 38 39 #ifdef SYS_VXWORKS 40 /* vxWorks needs mode flag -casey*/ 41 # define open(name, flags) open(name, flags, 0777) 42 # define SERVER_PORT_NUM 123 43 #endif 44 45 /* We use COMMAND as an autogen keyword */ 46 #ifdef COMMAND 47 # undef COMMAND 48 #endif 49 50 /* 51 * Because we now potentially understand a lot of commands (and 52 * it requires a lot of commands to talk to ntpd) we will run 53 * interactive if connected to a terminal. 54 */ 55 static int interactive = 0; /* set to 1 when we should prompt */ 56 static const char * prompt = "ntpdc> "; /* prompt to ask him about */ 57 58 /* 59 * Keyid used for authenticated requests. Obtained on the fly. 60 */ 61 static u_long info_auth_keyid; 62 static int keyid_entered = 0; 63 64 static int info_auth_keytype = NID_md5; /* MD5 */ 65 static size_t info_auth_hashlen = 16; /* MD5 */ 66 u_long current_time; /* needed by authkeys; not used */ 67 68 /* 69 * for get_systime() 70 */ 71 s_char sys_precision; /* local clock precision (log2 s) */ 72 73 int ntpdcmain (int, char **); 74 /* 75 * Built in command handler declarations 76 */ 77 static int openhost (const char *); 78 static int sendpkt (void *, size_t); 79 static void growpktdata (void); 80 static int getresponse (int, int, size_t *, size_t *, const char **, size_t); 81 static int sendrequest (int, int, int, size_t, size_t, const char *); 82 static void getcmds (void); 83 static RETSIGTYPE abortcmd (int); 84 static void docmd (const char *); 85 static void tokenize (const char *, char **, int *); 86 static int findcmd (char *, struct xcmd *, struct xcmd *, struct xcmd **); 87 static int getarg (char *, int, arg_v *); 88 static int getnetnum (const char *, sockaddr_u *, char *, int); 89 static void help (struct parse *, FILE *); 90 static int helpsort (const void *, const void *); 91 static void printusage (struct xcmd *, FILE *); 92 static void timeout (struct parse *, FILE *); 93 static void my_delay (struct parse *, FILE *); 94 static void host (struct parse *, FILE *); 95 static void keyid (struct parse *, FILE *); 96 static void keytype (struct parse *, FILE *); 97 static void passwd (struct parse *, FILE *); 98 static void hostnames (struct parse *, FILE *); 99 static void setdebug (struct parse *, FILE *); 100 static void quit (struct parse *, FILE *); 101 static void version (struct parse *, FILE *); 102 static void warning (const char *, ...) 103 __attribute__((__format__(__printf__, 1, 2))); 104 static void error (const char *, ...) 105 __attribute__((__format__(__printf__, 1, 2))); 106 static u_long getkeyid (const char *); 107 108 109 110 /* 111 * Built-in commands we understand 112 */ 113 static struct xcmd builtins[] = { 114 { "?", help, { OPT|NTP_STR, NO, NO, NO }, 115 { "command", "", "", "" }, 116 "tell the use and syntax of commands" }, 117 { "help", help, { OPT|NTP_STR, NO, NO, NO }, 118 { "command", "", "", "" }, 119 "tell the use and syntax of commands" }, 120 { "timeout", timeout, { OPT|NTP_UINT, NO, NO, NO }, 121 { "msec", "", "", "" }, 122 "set the primary receive time out" }, 123 { "delay", my_delay, { OPT|NTP_INT, NO, NO, NO }, 124 { "msec", "", "", "" }, 125 "set the delay added to encryption time stamps" }, 126 { "host", host, { OPT|NTP_STR, OPT|NTP_STR, NO, NO }, 127 { "-4|-6", "hostname", "", "" }, 128 "specify the host whose NTP server we talk to" }, 129 { "passwd", passwd, { OPT|NTP_STR, NO, NO, NO }, 130 { "", "", "", "" }, 131 "specify a password to use for authenticated requests"}, 132 { "hostnames", hostnames, { OPT|NTP_STR, NO, NO, NO }, 133 { "yes|no", "", "", "" }, 134 "specify whether hostnames or net numbers are printed"}, 135 { "debug", setdebug, { OPT|NTP_STR, NO, NO, NO }, 136 { "no|more|less", "", "", "" }, 137 "set/change debugging level" }, 138 { "quit", quit, { NO, NO, NO, NO }, 139 { "", "", "", "" }, 140 "exit ntpdc" }, 141 { "exit", quit, { NO, NO, NO, NO }, 142 { "", "", "", "" }, 143 "exit ntpdc" }, 144 { "keyid", keyid, { OPT|NTP_UINT, NO, NO, NO }, 145 { "key#", "", "", "" }, 146 "set/show keyid to use for authenticated requests" }, 147 { "keytype", keytype, { OPT|NTP_STR, NO, NO, NO }, 148 { "(md5|des)", "", "", "" }, 149 "set/show key authentication type for authenticated requests (des|md5)" }, 150 { "version", version, { NO, NO, NO, NO }, 151 { "", "", "", "" }, 152 "print version number" }, 153 { 0, 0, { NO, NO, NO, NO }, 154 { "", "", "", "" }, "" } 155 }; 156 157 158 /* 159 * Default values we use. 160 */ 161 #define DEFHOST "localhost" /* default host name */ 162 #define DEFTIMEOUT (5) /* 5 second time out */ 163 #define DEFSTIMEOUT (2) /* 2 second time out after first */ 164 #define DEFDELAY 0x51EB852 /* 20 milliseconds, l_fp fraction */ 165 #define LENHOSTNAME 256 /* host name is 256 characters long */ 166 #define MAXCMDS 100 /* maximum commands on cmd line */ 167 #define MAXHOSTS 200 /* maximum hosts on cmd line */ 168 #define MAXLINE 512 /* maximum line length */ 169 #define MAXTOKENS (1+1+MAXARGS+MOREARGS+2) /* maximum number of usable tokens */ 170 #define SCREENWIDTH 78 /* nominal screen width in columns */ 171 172 /* 173 * Some variables used and manipulated locally 174 */ 175 static struct sock_timeval tvout = { DEFTIMEOUT, 0 }; /* time out for reads */ 176 static struct sock_timeval tvsout = { DEFSTIMEOUT, 0 };/* secondary time out */ 177 static l_fp delay_time; /* delay time */ 178 static char currenthost[LENHOSTNAME]; /* current host name */ 179 int showhostnames = 1; /* show host names by default */ 180 181 static int ai_fam_templ = AF_UNSPEC; /* address family */ 182 static int ai_fam_default = AF_UNSPEC; /* default address family */ 183 static SOCKET sockfd; /* fd socket is opened on */ 184 static int havehost = 0; /* set to 1 when host open */ 185 int s_port = 0; 186 187 /* 188 * Holds data returned from queries. We allocate INITDATASIZE 189 * octets to begin with, increasing this as we need to. 190 */ 191 #define INITDATASIZE (sizeof(struct resp_pkt) * 16) 192 #define INCDATASIZE (sizeof(struct resp_pkt) * 8) 193 194 static char *pktdata; 195 static int pktdatasize; 196 197 /* 198 * These are used to help the magic with old and new versions of ntpd. 199 */ 200 int impl_ver = IMPL_XNTPD; 201 static int req_pkt_size = REQ_LEN_NOMAC; 202 203 /* 204 * For commands typed on the command line (with the -c option) 205 */ 206 static int numcmds = 0; 207 static const char *ccmds[MAXCMDS]; 208 #define ADDCMD(cp) if (numcmds < MAXCMDS) ccmds[numcmds++] = (cp) 209 210 /* 211 * When multiple hosts are specified. 212 */ 213 static int numhosts = 0; 214 static const char *chosts[MAXHOSTS]; 215 #define ADDHOST(cp) if (numhosts < MAXHOSTS) chosts[numhosts++] = (cp) 216 217 /* 218 * Error codes for internal use 219 */ 220 #define ERR_INCOMPLETE 16 221 #define ERR_TIMEOUT 17 222 223 /* 224 * Macro definitions we use 225 */ 226 #define ISSPACE(c) ((c) == ' ' || (c) == '\t') 227 #define ISEOL(c) ((c) == '\n' || (c) == '\r' || (c) == '\0') 228 #define STREQ(a, b) (*(a) == *(b) && strcmp((a), (b)) == 0) 229 230 /* 231 * Jump buffer for longjumping back to the command level. 232 * 233 * See ntpq/ntpq.c for an explanation why 'sig{set,long}jmp()' is used 234 * when available. 235 */ 236 #if HAVE_DECL_SIGSETJMP && HAVE_DECL_SIGLONGJMP 237 # define JMP_BUF sigjmp_buf 238 # define SETJMP(x) sigsetjmp((x), 1) 239 # define LONGJMP(x, v) siglongjmp((x),(v)) 240 #else 241 # define JMP_BUF jmp_buf 242 # define SETJMP(x) setjmp((x)) 243 # define LONGJMP(x, v) longjmp((x),(v)) 244 #endif 245 static JMP_BUF interrupt_buf; 246 static volatile int jump = 0; 247 248 /* 249 * Pointer to current output unit 250 */ 251 static FILE *current_output = NULL; 252 253 /* 254 * Command table imported from ntpdc_ops.c 255 */ 256 extern struct xcmd opcmds[]; 257 258 char const *progname; 259 260 #ifdef NO_MAIN_ALLOWED 261 CALL(ntpdc,"ntpdc",ntpdcmain); 262 #else 263 int 264 main( 265 int argc, 266 char *argv[] 267 ) 268 { 269 return ntpdcmain(argc, argv); 270 } 271 #endif 272 273 #ifdef SYS_VXWORKS 274 void clear_globals(void) 275 { 276 showhostnames = 0; /* show host names by default */ 277 havehost = 0; /* set to 1 when host open */ 278 numcmds = 0; 279 numhosts = 0; 280 } 281 #endif 282 283 /* 284 * main - parse arguments and handle options 285 */ 286 int 287 ntpdcmain( 288 int argc, 289 char *argv[] 290 ) 291 { 292 delay_time.l_ui = 0; 293 delay_time.l_uf = DEFDELAY; 294 295 #ifdef SYS_VXWORKS 296 clear_globals(); 297 taskPrioritySet(taskIdSelf(), 100 ); 298 #endif 299 300 init_lib(); /* sets up ipv4_works, ipv6_works */ 301 ssl_applink(); 302 init_auth(); 303 304 /* Check to see if we have IPv6. Otherwise default to IPv4 */ 305 if (!ipv6_works) 306 ai_fam_default = AF_INET; 307 308 progname = argv[0]; 309 310 { 311 int optct = ntpOptionProcess(&ntpdcOptions, argc, argv); 312 argc -= optct; 313 argv += optct; 314 } 315 316 if (HAVE_OPT(IPV4)) 317 ai_fam_default = AF_INET; 318 else if (HAVE_OPT(IPV6)) 319 ai_fam_default = AF_INET6; 320 321 ai_fam_templ = ai_fam_default; 322 323 if (HAVE_OPT(COMMAND)) { 324 int cmdct = STACKCT_OPT( COMMAND ); 325 const char** cmds = STACKLST_OPT( COMMAND ); 326 327 while (cmdct-- > 0) { 328 ADDCMD(*cmds++); 329 } 330 } 331 332 debug = OPT_VALUE_SET_DEBUG_LEVEL; 333 334 if (HAVE_OPT(INTERACTIVE)) { 335 interactive = 1; 336 } 337 338 if (HAVE_OPT(NUMERIC)) { 339 showhostnames = 0; 340 } 341 342 if (HAVE_OPT(LISTPEERS)) { 343 ADDCMD("listpeers"); 344 } 345 346 if (HAVE_OPT(PEERS)) { 347 ADDCMD("peers"); 348 } 349 350 if (HAVE_OPT(SHOWPEERS)) { 351 ADDCMD("dmpeers"); 352 } 353 354 if (ntp_optind == argc) { 355 ADDHOST(DEFHOST); 356 } else { 357 for (; ntp_optind < argc; ntp_optind++) 358 ADDHOST(argv[ntp_optind]); 359 } 360 361 if (numcmds == 0 && interactive == 0 362 && isatty(fileno(stdin)) && isatty(fileno(stderr))) { 363 interactive = 1; 364 } 365 366 #ifndef SYS_WINNT /* Under NT cannot handle SIGINT, WIN32 spawns a handler */ 367 if (interactive) 368 (void) signal_no_reset(SIGINT, abortcmd); 369 #endif /* SYS_WINNT */ 370 371 /* 372 * Initialize the packet data buffer 373 */ 374 pktdatasize = INITDATASIZE; 375 pktdata = emalloc(INITDATASIZE); 376 377 if (numcmds == 0) { 378 (void) openhost(chosts[0]); 379 getcmds(); 380 } else { 381 int ihost; 382 int icmd; 383 384 for (ihost = 0; ihost < numhosts; ihost++) { 385 if (openhost(chosts[ihost])) 386 for (icmd = 0; icmd < numcmds; icmd++) { 387 if (numhosts > 1) 388 printf ("--- %s ---\n",chosts[ihost]); 389 docmd(ccmds[icmd]); 390 } 391 } 392 } 393 #ifdef SYS_WINNT 394 WSACleanup(); 395 #endif 396 return(0); 397 } /* main end */ 398 399 400 /* 401 * openhost - open a socket to a host 402 */ 403 static int 404 openhost( 405 const char *hname 406 ) 407 { 408 char temphost[LENHOSTNAME]; 409 int a_info; 410 struct addrinfo hints, *ai = NULL; 411 sockaddr_u addr; 412 size_t octets; 413 const char *cp; 414 char name[LENHOSTNAME]; 415 char service[5]; 416 417 /* 418 * We need to get by the [] if they were entered 419 */ 420 if (*hname == '[') { 421 cp = strchr(hname + 1, ']'); 422 if (!cp || (octets = (size_t)(cp - hname) - 1) >= sizeof(name)) { 423 errno = EINVAL; 424 warning("%s", "bad hostname/address"); 425 return 0; 426 } 427 memcpy(name, hname + 1, octets); 428 name[octets] = '\0'; 429 hname = name; 430 } 431 432 /* 433 * First try to resolve it as an ip address and if that fails, 434 * do a fullblown (dns) lookup. That way we only use the dns 435 * when it is needed and work around some implementations that 436 * will return an "IPv4-mapped IPv6 address" address if you 437 * give it an IPv4 address to lookup. 438 */ 439 strlcpy(service, "ntp", sizeof(service)); 440 ZERO(hints); 441 hints.ai_family = ai_fam_templ; 442 hints.ai_protocol = IPPROTO_UDP; 443 hints.ai_socktype = SOCK_DGRAM; 444 hints.ai_flags = Z_AI_NUMERICHOST; 445 446 a_info = getaddrinfo(hname, service, &hints, &ai); 447 if (a_info == EAI_NONAME 448 #ifdef EAI_NODATA 449 || a_info == EAI_NODATA 450 #endif 451 ) { 452 hints.ai_flags = AI_CANONNAME; 453 #ifdef AI_ADDRCONFIG 454 hints.ai_flags |= AI_ADDRCONFIG; 455 #endif 456 a_info = getaddrinfo(hname, service, &hints, &ai); 457 } 458 /* Some older implementations don't like AI_ADDRCONFIG. */ 459 if (a_info == EAI_BADFLAGS) { 460 hints.ai_flags = AI_CANONNAME; 461 a_info = getaddrinfo(hname, service, &hints, &ai); 462 } 463 if (a_info != 0) { 464 fprintf(stderr, "%s\n", gai_strerror(a_info)); 465 if (ai != NULL) 466 freeaddrinfo(ai); 467 return 0; 468 } 469 470 /* 471 * getaddrinfo() has returned without error so ai should not 472 * be NULL. 473 */ 474 INSIST(ai != NULL); 475 ZERO(addr); 476 octets = min(sizeof(addr), ai->ai_addrlen); 477 memcpy(&addr, ai->ai_addr, octets); 478 479 if (ai->ai_canonname == NULL) 480 strlcpy(temphost, stoa(&addr), sizeof(temphost)); 481 else 482 strlcpy(temphost, ai->ai_canonname, sizeof(temphost)); 483 484 if (debug > 2) 485 printf("Opening host %s\n", temphost); 486 487 if (havehost == 1) { 488 if (debug > 2) 489 printf("Closing old host %s\n", currenthost); 490 closesocket(sockfd); 491 havehost = 0; 492 } 493 strlcpy(currenthost, temphost, sizeof(currenthost)); 494 495 /* port maps to the same in both families */ 496 s_port = NSRCPORT(&addr);; 497 #ifdef SYS_VXWORKS 498 ((struct sockaddr_in6 *)&hostaddr)->sin6_port = htons(SERVER_PORT_NUM); 499 if (ai->ai_family == AF_INET) 500 *(struct sockaddr_in *)&hostaddr= 501 *((struct sockaddr_in *)ai->ai_addr); 502 else 503 *(struct sockaddr_in6 *)&hostaddr= 504 *((struct sockaddr_in6 *)ai->ai_addr); 505 #endif /* SYS_VXWORKS */ 506 507 #ifdef SYS_WINNT 508 { 509 int optionValue = SO_SYNCHRONOUS_NONALERT; 510 int err; 511 512 err = setsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (void *)&optionValue, sizeof(optionValue)); 513 if (err != NO_ERROR) { 514 (void) fprintf(stderr, "cannot open nonoverlapped sockets\n"); 515 exit(1); 516 } 517 } 518 #endif /* SYS_WINNT */ 519 520 sockfd = socket(ai->ai_family, SOCK_DGRAM, 0); 521 if (sockfd == INVALID_SOCKET) { 522 error("socket"); 523 exit(-1); 524 } 525 526 #ifdef NEED_RCVBUF_SLOP 527 # ifdef SO_RCVBUF 528 { 529 int rbufsize = INITDATASIZE + 2048; /* 2K for slop */ 530 531 if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, 532 (void *)&rbufsize, sizeof(int)) == -1) 533 error("setsockopt"); 534 } 535 # endif 536 #endif 537 538 #ifdef SYS_VXWORKS 539 if (connect(sockfd, (struct sockaddr *)&hostaddr, 540 sizeof(hostaddr)) == -1) 541 #else 542 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) == -1) 543 #endif /* SYS_VXWORKS */ 544 { 545 error("connect"); 546 exit(-1); 547 } 548 549 freeaddrinfo(ai); 550 havehost = 1; 551 req_pkt_size = REQ_LEN_NOMAC; 552 impl_ver = IMPL_XNTPD; 553 return 1; 554 } 555 556 557 /* XXX ELIMINATE sendpkt similar in ntpq.c, ntpdc.c, ntp_io.c, ntptrace.c */ 558 /* 559 * sendpkt - send a packet to the remote host 560 */ 561 static int 562 sendpkt( 563 void * xdata, 564 size_t xdatalen 565 ) 566 { 567 if (send(sockfd, xdata, xdatalen, 0) == -1) { 568 warning("write to %s failed", currenthost); 569 return -1; 570 } 571 572 return 0; 573 } 574 575 576 /* 577 * growpktdata - grow the packet data area 578 */ 579 static void 580 growpktdata(void) 581 { 582 size_t priorsz; 583 584 priorsz = (size_t)pktdatasize; 585 pktdatasize += INCDATASIZE; 586 pktdata = erealloc_zero(pktdata, (size_t)pktdatasize, priorsz); 587 } 588 589 590 /* 591 * getresponse - get a (series of) response packet(s) and return the data 592 */ 593 static int 594 getresponse( 595 int implcode, 596 int reqcode, 597 size_t *ritems, 598 size_t *rsize, 599 const char **rdata, 600 size_t esize 601 ) 602 { 603 struct resp_pkt rpkt; 604 struct sock_timeval tvo; 605 size_t items; 606 size_t i; 607 size_t size; 608 size_t datasize; 609 char *datap; 610 char *tmp_data; 611 char haveseq[MAXSEQ+1]; 612 int firstpkt; 613 int lastseq; 614 int numrecv; 615 int seq; 616 fd_set fds; 617 ssize_t n; 618 int pad; 619 /* absolute timeout checks. Not 'time_t' by intention! */ 620 uint32_t tobase; /* base value for timeout */ 621 uint32_t tospan; /* timeout span (max delay) */ 622 uint32_t todiff; /* current delay */ 623 624 /* 625 * This is pretty tricky. We may get between 1 and many packets 626 * back in response to the request. We peel the data out of 627 * each packet and collect it in one long block. When the last 628 * packet in the sequence is received we'll know how many we 629 * should have had. Note we use one long time out, should reconsider. 630 */ 631 *ritems = 0; 632 *rsize = 0; 633 firstpkt = 1; 634 numrecv = 0; 635 *rdata = datap = pktdata; 636 lastseq = 999; /* too big to be a sequence number */ 637 ZERO(haveseq); 638 FD_ZERO(&fds); 639 tobase = (uint32_t)time(NULL); 640 641 again: 642 if (firstpkt) 643 tvo = tvout; 644 else 645 tvo = tvsout; 646 tospan = (uint32_t)tvo.tv_sec + (tvo.tv_usec != 0); 647 648 FD_SET(sockfd, &fds); 649 n = select(sockfd+1, &fds, NULL, NULL, &tvo); 650 if (n == -1) { 651 warning("select fails"); 652 return -1; 653 } 654 655 /* 656 * Check if this is already too late. Trash the data and fake a 657 * timeout if this is so. 658 */ 659 todiff = (((uint32_t)time(NULL)) - tobase) & 0x7FFFFFFFu; 660 if ((n > 0) && (todiff > tospan)) { 661 n = recv(sockfd, (char *)&rpkt, sizeof(rpkt), 0); 662 n -= n; /* faked timeout return from 'select()'*/ 663 } 664 665 if (n == 0) { 666 /* 667 * Timed out. Return what we have 668 */ 669 if (firstpkt) { 670 (void) fprintf(stderr, 671 "%s: timed out, nothing received\n", 672 currenthost); 673 return ERR_TIMEOUT; 674 } else { 675 (void) fprintf(stderr, 676 "%s: timed out with incomplete data\n", 677 currenthost); 678 if (debug) { 679 printf("Received sequence numbers"); 680 for (n = 0; n <= MAXSEQ; n++) 681 if (haveseq[n]) 682 printf(" %zd,", (size_t)n); 683 if (lastseq != 999) 684 printf(" last frame received\n"); 685 else 686 printf(" last frame not received\n"); 687 } 688 return ERR_INCOMPLETE; 689 } 690 } 691 692 n = recv(sockfd, (char *)&rpkt, sizeof(rpkt), 0); 693 if (n == -1) { 694 warning("read"); 695 return -1; 696 } 697 698 699 /* 700 * Check for format errors. Bug proofing. 701 */ 702 if (n < (ssize_t)RESP_HEADER_SIZE) { 703 if (debug) 704 printf("Short (%zd byte) packet received\n", (size_t)n); 705 goto again; 706 } 707 if (INFO_VERSION(rpkt.rm_vn_mode) > NTP_VERSION || 708 INFO_VERSION(rpkt.rm_vn_mode) < NTP_OLDVERSION) { 709 if (debug) 710 printf("Packet received with version %d\n", 711 INFO_VERSION(rpkt.rm_vn_mode)); 712 goto again; 713 } 714 if (INFO_MODE(rpkt.rm_vn_mode) != MODE_PRIVATE) { 715 if (debug) 716 printf("Packet received with mode %d\n", 717 INFO_MODE(rpkt.rm_vn_mode)); 718 goto again; 719 } 720 if (INFO_IS_AUTH(rpkt.auth_seq)) { 721 if (debug) 722 printf("Encrypted packet received\n"); 723 goto again; 724 } 725 if (!ISRESPONSE(rpkt.rm_vn_mode)) { 726 if (debug) 727 printf("Received request packet, wanted response\n"); 728 goto again; 729 } 730 if (INFO_MBZ(rpkt.mbz_itemsize) != 0) { 731 if (debug) 732 printf("Received packet with nonzero MBZ field!\n"); 733 goto again; 734 } 735 736 /* 737 * Check implementation/request. Could be old data getting to us. 738 */ 739 if (rpkt.implementation != implcode || rpkt.request != reqcode) { 740 if (debug) 741 printf( 742 "Received implementation/request of %d/%d, wanted %d/%d", 743 rpkt.implementation, rpkt.request, 744 implcode, reqcode); 745 goto again; 746 } 747 748 /* 749 * Check the error code. If non-zero, return it. 750 */ 751 if (INFO_ERR(rpkt.err_nitems) != INFO_OKAY) { 752 if (debug && ISMORE(rpkt.rm_vn_mode)) { 753 printf("Error code %d received on not-final packet\n", 754 INFO_ERR(rpkt.err_nitems)); 755 } 756 return (int)INFO_ERR(rpkt.err_nitems); 757 } 758 759 /* 760 * Collect items and size. Make sure they make sense. 761 */ 762 items = INFO_NITEMS(rpkt.err_nitems); 763 size = INFO_ITEMSIZE(rpkt.mbz_itemsize); 764 if (esize > size) 765 pad = esize - size; 766 else 767 pad = 0; 768 datasize = items * size; 769 if ((size_t)datasize > (n-RESP_HEADER_SIZE)) { 770 if (debug) 771 printf( 772 "Received items %zu, size %zu (total %zu), data in packet is %zu\n", 773 items, size, datasize, n-RESP_HEADER_SIZE); 774 goto again; 775 } 776 777 /* 778 * If this isn't our first packet, make sure the size matches 779 * the other ones. 780 */ 781 if (!firstpkt && size != *rsize) { 782 if (debug) 783 printf("Received itemsize %zu, previous %zu\n", 784 size, *rsize); 785 goto again; 786 } 787 /* 788 * If we've received this before, +toss it 789 */ 790 seq = INFO_SEQ(rpkt.auth_seq); 791 if (haveseq[seq]) { 792 if (debug) 793 printf("Received duplicate sequence number %d\n", seq); 794 goto again; 795 } 796 haveseq[seq] = 1; 797 798 /* 799 * If this is the last in the sequence, record that. 800 */ 801 if (!ISMORE(rpkt.rm_vn_mode)) { 802 if (lastseq != 999) { 803 printf("Received second end sequence packet\n"); 804 goto again; 805 } 806 lastseq = seq; 807 } 808 809 /* 810 * So far, so good. Copy this data into the output array. Bump 811 * the timeout base, in case we expect more data. 812 */ 813 tobase = (uint32_t)time(NULL); 814 if ((datap + datasize + (pad * items)) > (pktdata + pktdatasize)) { 815 size_t offset = datap - pktdata; 816 growpktdata(); 817 *rdata = pktdata; /* might have been realloced ! */ 818 datap = pktdata + offset; 819 } 820 /* 821 * We now move the pointer along according to size and number of 822 * items. This is so we can play nice with older implementations 823 */ 824 825 tmp_data = rpkt.u.data; 826 for (i = 0; i < items; i++) { 827 memcpy(datap, tmp_data, (unsigned)size); 828 tmp_data += size; 829 zero_mem(datap + size, pad); 830 datap += size + pad; 831 } 832 833 if (firstpkt) { 834 firstpkt = 0; 835 *rsize = size + pad; 836 } 837 *ritems += items; 838 839 /* 840 * Finally, check the count of received packets. If we've got them 841 * all, return 842 */ 843 ++numrecv; 844 if (numrecv <= lastseq) 845 goto again; 846 return INFO_OKAY; 847 } 848 849 850 /* 851 * sendrequest - format and send a request packet 852 * 853 * Historically, ntpdc has used a fixed-size request packet regardless 854 * of the actual payload size. When authenticating, the timestamp, key 855 * ID, and digest have been placed just before the end of the packet. 856 * With the introduction in late 2009 of support for authenticated 857 * ntpdc requests using larger 20-octet digests (vs. 16 for MD5), we 858 * come up four bytes short. 859 * 860 * To maintain interop while allowing for larger digests, the behavior 861 * is unchanged when using 16-octet digests. For larger digests, the 862 * timestamp, key ID, and digest are placed immediately following the 863 * request payload, with the overall packet size variable. ntpd can 864 * distinguish 16-octet digests by the overall request size being 865 * REQ_LEN_NOMAC + 4 + 16 with the auth bit enabled. When using a 866 * longer digest, that request size should be avoided. 867 * 868 * With the form used with 20-octet and larger digests, the timestamp, 869 * key ID, and digest are located by ntpd relative to the start of the 870 * packet, and the size of the digest is then implied by the packet 871 * size. 872 */ 873 static int 874 sendrequest( 875 int implcode, 876 int reqcode, 877 int auth, 878 size_t qitems, 879 size_t qsize, 880 const char *qdata 881 ) 882 { 883 struct req_pkt qpkt; 884 size_t datasize; 885 size_t reqsize; 886 u_long key_id; 887 l_fp ts; 888 l_fp * ptstamp; 889 size_t maclen; 890 char * pass; 891 892 ZERO(qpkt); 893 qpkt.rm_vn_mode = RM_VN_MODE(0, 0, 0); 894 qpkt.implementation = (u_char)implcode; 895 qpkt.request = (u_char)reqcode; 896 897 datasize = qitems * qsize; 898 if (datasize && qdata != NULL) { 899 memcpy(qpkt.u.data, qdata, datasize); 900 qpkt.err_nitems = ERR_NITEMS(0, qitems); 901 qpkt.mbz_itemsize = MBZ_ITEMSIZE(qsize); 902 } else { 903 qpkt.err_nitems = ERR_NITEMS(0, 0); 904 qpkt.mbz_itemsize = MBZ_ITEMSIZE(qsize); /* allow for optional first item */ 905 } 906 907 if (!auth || (keyid_entered && info_auth_keyid == 0)) { 908 qpkt.auth_seq = AUTH_SEQ(0, 0); 909 return sendpkt(&qpkt, req_pkt_size); 910 } 911 912 if (info_auth_keyid == 0) { 913 key_id = getkeyid("Keyid: "); 914 if (!key_id) { 915 fprintf(stderr, "Invalid key identifier\n"); 916 return 1; 917 } 918 info_auth_keyid = key_id; 919 } 920 if (!authistrusted(info_auth_keyid)) { 921 pass = getpass_keytype(info_auth_keytype); 922 if ('\0' == pass[0]) { 923 fprintf(stderr, "Invalid password\n"); 924 return 1; 925 } 926 authusekey(info_auth_keyid, info_auth_keytype, 927 (u_char *)pass); 928 authtrust(info_auth_keyid, 1); 929 } 930 qpkt.auth_seq = AUTH_SEQ(1, 0); 931 if (info_auth_hashlen > 16) { 932 /* 933 * Only ntpd which expects REQ_LEN_NOMAC plus maclen 934 * octets in an authenticated request using a 16 octet 935 * digest (that is, a newer ntpd) will handle digests 936 * larger than 16 octets, so for longer digests, do 937 * not attempt to shorten the requests for downlevel 938 * ntpd compatibility. 939 */ 940 if (REQ_LEN_NOMAC != req_pkt_size) 941 return 1; 942 reqsize = REQ_LEN_HDR + datasize + sizeof(*ptstamp); 943 /* align to 32 bits */ 944 reqsize = (reqsize + 3) & ~3; 945 } else 946 reqsize = req_pkt_size; 947 ptstamp = (void *)((char *)&qpkt + reqsize); 948 ptstamp--; 949 get_systime(&ts); 950 L_ADD(&ts, &delay_time); 951 HTONL_FP(&ts, ptstamp); 952 maclen = authencrypt( 953 info_auth_keyid, (void *)&qpkt, size2int_chk(reqsize)); 954 if (!maclen) { 955 fprintf(stderr, "Key not found\n"); 956 return 1; 957 } else if (maclen != (size_t)(info_auth_hashlen + sizeof(keyid_t))) { 958 fprintf(stderr, 959 "%zu octet MAC, %zu expected with %zu octet digest\n", 960 maclen, (info_auth_hashlen + sizeof(keyid_t)), 961 info_auth_hashlen); 962 return 1; 963 } 964 return sendpkt(&qpkt, reqsize + maclen); 965 } 966 967 968 /* 969 * doquery - send a request and process the response 970 */ 971 int 972 doquery( 973 int implcode, 974 int reqcode, 975 int auth, 976 size_t qitems, 977 size_t qsize, 978 const char *qdata, 979 size_t *ritems, 980 size_t *rsize, 981 const char **rdata, 982 int quiet_mask, 983 int esize 984 ) 985 { 986 int res; 987 char junk[512]; 988 fd_set fds; 989 struct sock_timeval tvzero; 990 991 /* 992 * Check to make sure host is open 993 */ 994 if (!havehost) { 995 (void) fprintf(stderr, "***No host open, use `host' command\n"); 996 return -1; 997 } 998 999 /* 1000 * Poll the socket and clear out any pending data 1001 */ 1002 again: 1003 do { 1004 tvzero.tv_sec = tvzero.tv_usec = 0; 1005 FD_ZERO(&fds); 1006 FD_SET(sockfd, &fds); 1007 res = select(sockfd+1, &fds, NULL, NULL, &tvzero); 1008 if (res == -1) { 1009 warning("polling select"); 1010 return -1; 1011 } else if (res > 0) 1012 1013 (void) recv(sockfd, junk, sizeof junk, 0); 1014 } while (res > 0); 1015 1016 1017 /* 1018 * send a request 1019 */ 1020 res = sendrequest(implcode, reqcode, auth, qitems, qsize, qdata); 1021 if (res != 0) 1022 return res; 1023 1024 /* 1025 * Get the response. If we got a standard error, print a message 1026 */ 1027 res = getresponse(implcode, reqcode, ritems, rsize, rdata, esize); 1028 1029 /* 1030 * Try to be compatible with older implementations of ntpd. 1031 */ 1032 if (res == INFO_ERR_FMT && req_pkt_size != 48) { 1033 int oldsize; 1034 1035 oldsize = req_pkt_size; 1036 1037 switch(req_pkt_size) { 1038 case REQ_LEN_NOMAC: 1039 req_pkt_size = 160; 1040 break; 1041 case 160: 1042 req_pkt_size = 48; 1043 break; 1044 } 1045 if (impl_ver == IMPL_XNTPD) { 1046 fprintf(stderr, 1047 "***Warning changing to older implementation\n"); 1048 return INFO_ERR_IMPL; 1049 } 1050 1051 fprintf(stderr, 1052 "***Warning changing the request packet size from %d to %d\n", 1053 oldsize, req_pkt_size); 1054 goto again; 1055 } 1056 1057 /* log error message if not told to be quiet */ 1058 if ((res > 0) && (((1 << res) & quiet_mask) == 0)) { 1059 switch(res) { 1060 case INFO_ERR_IMPL: 1061 /* Give us a chance to try the older implementation. */ 1062 if (implcode == IMPL_XNTPD) 1063 break; 1064 (void) fprintf(stderr, 1065 "***Server implementation incompatible with our own\n"); 1066 break; 1067 case INFO_ERR_REQ: 1068 (void) fprintf(stderr, 1069 "***Server doesn't implement this request\n"); 1070 break; 1071 case INFO_ERR_FMT: 1072 (void) fprintf(stderr, 1073 "***Server reports a format error in the received packet (shouldn't happen)\n"); 1074 break; 1075 case INFO_ERR_NODATA: 1076 (void) fprintf(stderr, 1077 "***Server reports data not found\n"); 1078 break; 1079 case INFO_ERR_AUTH: 1080 (void) fprintf(stderr, "***Permission denied\n"); 1081 break; 1082 case ERR_TIMEOUT: 1083 (void) fprintf(stderr, "***Request timed out\n"); 1084 break; 1085 case ERR_INCOMPLETE: 1086 (void) fprintf(stderr, 1087 "***Response from server was incomplete\n"); 1088 break; 1089 default: 1090 (void) fprintf(stderr, 1091 "***Server returns unknown error code %d\n", res); 1092 break; 1093 } 1094 } 1095 return res; 1096 } 1097 1098 1099 /* 1100 * getcmds - read commands from the standard input and execute them 1101 */ 1102 static void 1103 getcmds(void) 1104 { 1105 char * line; 1106 int count; 1107 1108 ntp_readline_init(interactive ? prompt : NULL); 1109 1110 for (;;) { 1111 line = ntp_readline(&count); 1112 if (NULL == line) 1113 break; 1114 docmd(line); 1115 free(line); 1116 } 1117 1118 ntp_readline_uninit(); 1119 } 1120 1121 1122 #ifndef SYS_WINNT /* Under NT cannot handle SIGINT, WIN32 spawns a handler */ 1123 /* 1124 * abortcmd - catch interrupts and abort the current command 1125 */ 1126 static RETSIGTYPE 1127 abortcmd( 1128 int sig 1129 ) 1130 { 1131 if (current_output == stdout) 1132 (void)fflush(stdout); 1133 putc('\n', stderr); 1134 (void)fflush(stderr); 1135 if (jump) { 1136 jump = 0; 1137 LONGJMP(interrupt_buf, 1); 1138 } 1139 } 1140 #endif /* SYS_WINNT */ 1141 1142 /* 1143 * docmd - decode the command line and execute a command 1144 */ 1145 static void 1146 docmd( 1147 const char *cmdline 1148 ) 1149 { 1150 char *tokens[1+MAXARGS+MOREARGS+2]; 1151 struct parse pcmd; 1152 int ntok; 1153 int i, ti; 1154 int rval; 1155 struct xcmd *xcmd; 1156 1157 ai_fam_templ = ai_fam_default; 1158 /* 1159 * Tokenize the command line. If nothing on it, return. 1160 */ 1161 if (strlen(cmdline) >= MAXLINE) { 1162 fprintf(stderr, "***Command ignored, more than %d characters:\n%s\n", 1163 MAXLINE - 1, cmdline); 1164 return; 1165 } 1166 tokenize(cmdline, tokens, &ntok); 1167 if (ntok == 0) 1168 return; 1169 1170 /* 1171 * Find the appropriate command description. 1172 */ 1173 i = findcmd(tokens[0], builtins, opcmds, &xcmd); 1174 if (i == 0) { 1175 (void) fprintf(stderr, "***Command `%s' unknown\n", 1176 tokens[0]); 1177 return; 1178 } else if (i >= 2) { 1179 (void) fprintf(stderr, "***Command `%s' ambiguous\n", 1180 tokens[0]); 1181 return; 1182 } 1183 1184 /* 1185 * Save the keyword, then walk through the arguments, interpreting 1186 * as we go. 1187 */ 1188 pcmd.keyword = tokens[0]; 1189 pcmd.nargs = 0; 1190 ti = 1; 1191 for (i = 0; i < MAXARGS && xcmd->arg[i] != NO;) { 1192 if ((i+ti) >= ntok) { 1193 if (!(xcmd->arg[i] & OPT)) { 1194 printusage(xcmd, stderr); 1195 return; 1196 } 1197 break; 1198 } 1199 if ((xcmd->arg[i] & OPT) && (*tokens[i+ti] == '>')) 1200 break; 1201 rval = getarg(tokens[i+ti], (int)xcmd->arg[i], &pcmd.argval[i]); 1202 if (rval == -1) { 1203 ti++; 1204 continue; 1205 } 1206 if (rval == 0) 1207 return; 1208 pcmd.nargs++; 1209 i++; 1210 } 1211 1212 /* Any extra args are assumed to be "OPT|NTP_STR". */ 1213 for ( ; i < MAXARGS + MOREARGS;) { 1214 if ((i+ti) >= ntok) 1215 break; 1216 rval = getarg(tokens[i+ti], (int)(OPT|NTP_STR), &pcmd.argval[i]); 1217 if (rval == -1) { 1218 ti++; 1219 continue; 1220 } 1221 if (rval == 0) 1222 return; 1223 pcmd.nargs++; 1224 i++; 1225 } 1226 1227 i += ti; 1228 if (i < ntok && *tokens[i] == '>') { 1229 char *fname; 1230 1231 if (*(tokens[i]+1) != '\0') 1232 fname = tokens[i]+1; 1233 else if ((i+1) < ntok) 1234 fname = tokens[i+1]; 1235 else { 1236 (void) fprintf(stderr, "***No file for redirect\n"); 1237 return; 1238 } 1239 1240 current_output = fopen(fname, "w"); 1241 if (current_output == NULL) { 1242 (void) fprintf(stderr, "***Error opening %s: ", fname); 1243 perror(""); 1244 return; 1245 } 1246 } else { 1247 current_output = stdout; 1248 } 1249 1250 if (interactive) { 1251 if ( ! SETJMP(interrupt_buf)) { 1252 jump = 1; 1253 (xcmd->handler)(&pcmd, current_output); 1254 jump = 0; 1255 } else { 1256 fflush(current_output); 1257 fputs("\n >>> command aborted <<<\n", stderr); 1258 fflush(stderr); 1259 } 1260 } else { 1261 jump = 0; 1262 (xcmd->handler)(&pcmd, current_output); 1263 } 1264 if ((NULL != current_output) && (stdout != current_output)) { 1265 (void)fclose(current_output); 1266 current_output = NULL; 1267 } 1268 } 1269 1270 1271 /* 1272 * tokenize - turn a command line into tokens 1273 */ 1274 static void 1275 tokenize( 1276 const char *line, 1277 char **tokens, 1278 int *ntok 1279 ) 1280 { 1281 register const char *cp; 1282 register char *sp; 1283 static char tspace[MAXLINE]; 1284 1285 sp = tspace; 1286 cp = line; 1287 for (*ntok = 0; *ntok < MAXTOKENS; (*ntok)++) { 1288 tokens[*ntok] = sp; 1289 while (ISSPACE(*cp)) 1290 cp++; 1291 if (ISEOL(*cp)) 1292 break; 1293 do { 1294 *sp++ = *cp++; 1295 } while (!ISSPACE(*cp) && !ISEOL(*cp)); 1296 1297 *sp++ = '\0'; 1298 } 1299 } 1300 1301 1302 1303 /* 1304 * findcmd - find a command in a command description table 1305 */ 1306 static int 1307 findcmd( 1308 register char *str, 1309 struct xcmd *clist1, 1310 struct xcmd *clist2, 1311 struct xcmd **cmd 1312 ) 1313 { 1314 register struct xcmd *cl; 1315 size_t clen; 1316 int nmatch; 1317 struct xcmd *nearmatch = NULL; 1318 struct xcmd *clist; 1319 1320 clen = strlen(str); 1321 nmatch = 0; 1322 if (clist1 != 0) 1323 clist = clist1; 1324 else if (clist2 != 0) 1325 clist = clist2; 1326 else 1327 return 0; 1328 1329 again: 1330 for (cl = clist; cl->keyword != 0; cl++) { 1331 /* do a first character check, for efficiency */ 1332 if (*str != *(cl->keyword)) 1333 continue; 1334 if (strncmp(str, cl->keyword, (unsigned)clen) == 0) { 1335 /* 1336 * Could be extact match, could be approximate. 1337 * Is exact if the length of the keyword is the 1338 * same as the str. 1339 */ 1340 if (*((cl->keyword) + clen) == '\0') { 1341 *cmd = cl; 1342 return 1; 1343 } 1344 nmatch++; 1345 nearmatch = cl; 1346 } 1347 } 1348 1349 /* 1350 * See if there is more to do. If so, go again. Sorry about the 1351 * goto, too much looking at BSD sources... 1352 */ 1353 if (clist == clist1 && clist2 != 0) { 1354 clist = clist2; 1355 goto again; 1356 } 1357 1358 /* 1359 * If we got extactly 1 near match, use it, else return number 1360 * of matches. 1361 */ 1362 if (nmatch == 1) { 1363 *cmd = nearmatch; 1364 return 1; 1365 } 1366 return nmatch; 1367 } 1368 1369 1370 /* 1371 * getarg - interpret an argument token 1372 * 1373 * string is always set. 1374 * type is set to the decoded type. 1375 * 1376 * return: 0 - failure 1377 * 1 - success 1378 * -1 - skip to next token 1379 */ 1380 static int 1381 getarg( 1382 char *str, 1383 int code, 1384 arg_v *argp 1385 ) 1386 { 1387 ZERO(*argp); 1388 argp->string = str; 1389 argp->type = code & ~OPT; 1390 1391 switch (argp->type) { 1392 case NTP_STR: 1393 break; 1394 case NTP_ADD: 1395 if (!strcmp("-6", str)) { 1396 ai_fam_templ = AF_INET6; 1397 return -1; 1398 } else if (!strcmp("-4", str)) { 1399 ai_fam_templ = AF_INET; 1400 return -1; 1401 } 1402 if (!getnetnum(str, &(argp->netnum), (char *)0, ai_fam_templ)) { 1403 return 0; 1404 } 1405 break; 1406 case NTP_UINT: 1407 if (!atouint(str, &argp->uval)) { 1408 fprintf(stderr, "***Illegal unsigned value %s\n", 1409 str); 1410 return 0; 1411 } 1412 break; 1413 case NTP_INT: 1414 if (!atoint(str, &argp->ival)) { 1415 fprintf(stderr, "***Illegal integer value %s\n", 1416 str); 1417 return 0; 1418 } 1419 break; 1420 case IP_VERSION: 1421 if (!strcmp("-6", str)) 1422 argp->ival = 6 ; 1423 else if (!strcmp("-4", str)) 1424 argp->ival = 4 ; 1425 else { 1426 (void) fprintf(stderr, 1427 "***Version must be either 4 or 6\n"); 1428 return 0; 1429 } 1430 break; 1431 } 1432 1433 return 1; 1434 } 1435 1436 1437 /* 1438 * getnetnum - given a host name, return its net number 1439 * and (optional) full name 1440 */ 1441 static int 1442 getnetnum( 1443 const char *hname, 1444 sockaddr_u *num, 1445 char *fullhost, 1446 int af 1447 ) 1448 { 1449 struct addrinfo hints, *ai = NULL; 1450 1451 ZERO(hints); 1452 hints.ai_family = af; 1453 hints.ai_flags = AI_CANONNAME; 1454 #ifdef AI_ADDRCONFIG 1455 hints.ai_flags |= AI_ADDRCONFIG; 1456 #endif 1457 1458 /* 1459 * decodenetnum only works with addresses, but handles syntax 1460 * that getaddrinfo doesn't: [2001::1]:1234 1461 */ 1462 if (decodenetnum(hname, num)) { 1463 if (fullhost != NULL) 1464 getnameinfo(&num->sa, SOCKLEN(num), fullhost, 1465 LENHOSTNAME, NULL, 0, 0); 1466 return 1; 1467 } else if (getaddrinfo(hname, "ntp", &hints, &ai) == 0) { 1468 INSIST(sizeof(*num) >= ai->ai_addrlen); 1469 memcpy(num, ai->ai_addr, ai->ai_addrlen); 1470 if (fullhost != NULL) { 1471 if (ai->ai_canonname != NULL) 1472 strlcpy(fullhost, ai->ai_canonname, 1473 LENHOSTNAME); 1474 else 1475 getnameinfo(&num->sa, SOCKLEN(num), 1476 fullhost, LENHOSTNAME, NULL, 1477 0, 0); 1478 } 1479 return 1; 1480 } 1481 fprintf(stderr, "***Can't find host %s\n", hname); 1482 1483 return 0; 1484 } 1485 1486 1487 /* 1488 * nntohost - convert network number to host name. This routine enforces 1489 * the showhostnames setting. 1490 */ 1491 const char * 1492 nntohost( 1493 sockaddr_u *netnum 1494 ) 1495 { 1496 if (!showhostnames || SOCK_UNSPEC(netnum)) 1497 return stoa(netnum); 1498 else if (ISREFCLOCKADR(netnum)) 1499 return refnumtoa(netnum); 1500 else 1501 return socktohost(netnum); 1502 } 1503 1504 1505 /* 1506 * Finally, the built in command handlers 1507 */ 1508 1509 /* 1510 * help - tell about commands, or details of a particular command 1511 */ 1512 static void 1513 help( 1514 struct parse *pcmd, 1515 FILE *fp 1516 ) 1517 { 1518 struct xcmd *xcp; 1519 char *cmd; 1520 const char *list[100]; 1521 size_t word, words; 1522 size_t row, rows; 1523 size_t col, cols; 1524 size_t length; 1525 1526 if (pcmd->nargs == 0) { 1527 words = 0; 1528 for (xcp = builtins; xcp->keyword != 0; xcp++) { 1529 if (*(xcp->keyword) != '?') 1530 list[words++] = xcp->keyword; 1531 } 1532 for (xcp = opcmds; xcp->keyword != 0; xcp++) 1533 list[words++] = xcp->keyword; 1534 1535 qsort((void *)list, words, sizeof(list[0]), helpsort); 1536 col = 0; 1537 for (word = 0; word < words; word++) { 1538 length = strlen(list[word]); 1539 col = max(col, length); 1540 } 1541 1542 cols = SCREENWIDTH / ++col; 1543 rows = (words + cols - 1) / cols; 1544 1545 fprintf(fp, "ntpdc commands:\n"); 1546 1547 for (row = 0; row < rows; row++) { 1548 for (word = row; word < words; word += rows) 1549 fprintf(fp, "%-*.*s", (int)col, 1550 (int)col - 1, list[word]); 1551 fprintf(fp, "\n"); 1552 } 1553 } else { 1554 cmd = pcmd->argval[0].string; 1555 words = findcmd(cmd, builtins, opcmds, &xcp); 1556 if (words == 0) { 1557 fprintf(stderr, 1558 "Command `%s' is unknown\n", cmd); 1559 return; 1560 } else if (words >= 2) { 1561 fprintf(stderr, 1562 "Command `%s' is ambiguous\n", cmd); 1563 return; 1564 } 1565 fprintf(fp, "function: %s\n", xcp->comment); 1566 printusage(xcp, fp); 1567 } 1568 } 1569 1570 1571 /* 1572 * helpsort - do hostname qsort comparisons 1573 */ 1574 static int 1575 helpsort( 1576 const void *t1, 1577 const void *t2 1578 ) 1579 { 1580 const char * const * name1 = t1; 1581 const char * const * name2 = t2; 1582 1583 return strcmp(*name1, *name2); 1584 } 1585 1586 1587 /* 1588 * printusage - print usage information for a command 1589 */ 1590 static void 1591 printusage( 1592 struct xcmd *xcp, 1593 FILE *fp 1594 ) 1595 { 1596 int i, opt46; 1597 1598 opt46 = 0; 1599 (void) fprintf(fp, "usage: %s", xcp->keyword); 1600 for (i = 0; i < MAXARGS && xcp->arg[i] != NO; i++) { 1601 if (opt46 == 0 && (xcp->arg[i] & ~OPT) == NTP_ADD) { 1602 (void) fprintf(fp, " [ -4|-6 ]"); 1603 opt46 = 1; 1604 } 1605 if (xcp->arg[i] & OPT) 1606 (void) fprintf(fp, " [ %s ]", xcp->desc[i]); 1607 else 1608 (void) fprintf(fp, " %s", xcp->desc[i]); 1609 } 1610 (void) fprintf(fp, "\n"); 1611 } 1612 1613 1614 /* 1615 * timeout - set time out time 1616 */ 1617 static void 1618 timeout( 1619 struct parse *pcmd, 1620 FILE *fp 1621 ) 1622 { 1623 int val; 1624 1625 if (pcmd->nargs == 0) { 1626 val = tvout.tv_sec * 1000 + tvout.tv_usec / 1000; 1627 (void) fprintf(fp, "primary timeout %d ms\n", val); 1628 } else { 1629 tvout.tv_sec = pcmd->argval[0].uval / 1000; 1630 tvout.tv_usec = (pcmd->argval[0].uval - (tvout.tv_sec * 1000)) 1631 * 1000; 1632 } 1633 } 1634 1635 1636 /* 1637 * my_delay - set delay for auth requests 1638 */ 1639 static void 1640 my_delay( 1641 struct parse *pcmd, 1642 FILE *fp 1643 ) 1644 { 1645 int isneg; 1646 u_long val; 1647 1648 if (pcmd->nargs == 0) { 1649 val = delay_time.l_ui * 1000 + delay_time.l_uf / 4294967; 1650 (void) fprintf(fp, "delay %lu ms\n", val); 1651 } else { 1652 if (pcmd->argval[0].ival < 0) { 1653 isneg = 1; 1654 val = ~(u_long)(pcmd->argval[0].ival) + 1UL; 1655 } else { 1656 isneg = 0; 1657 val = (u_long)pcmd->argval[0].ival; 1658 } 1659 1660 delay_time.l_ui = val / 1000; 1661 val %= 1000; 1662 delay_time.l_uf = val * 4294967; /* 2**32/1000 */ 1663 1664 if (isneg) 1665 L_NEG(&delay_time); 1666 } 1667 } 1668 1669 1670 /* 1671 * host - set the host we are dealing with. 1672 */ 1673 static void 1674 host( 1675 struct parse *pcmd, 1676 FILE *fp 1677 ) 1678 { 1679 int i; 1680 1681 if (pcmd->nargs == 0) { 1682 if (havehost) 1683 (void) fprintf(fp, "current host is %s\n", currenthost); 1684 else 1685 (void) fprintf(fp, "no current host\n"); 1686 return; 1687 } 1688 1689 i = 0; 1690 if (pcmd->nargs == 2) { 1691 if (!strcmp("-4", pcmd->argval[i].string)) 1692 ai_fam_templ = AF_INET; 1693 else if (!strcmp("-6", pcmd->argval[i].string)) 1694 ai_fam_templ = AF_INET6; 1695 else { 1696 if (havehost) 1697 (void) fprintf(fp, 1698 "current host remains %s\n", currenthost); 1699 else 1700 (void) fprintf(fp, "still no current host\n"); 1701 return; 1702 } 1703 i = 1; 1704 } 1705 if (openhost(pcmd->argval[i].string)) { 1706 (void) fprintf(fp, "current host set to %s\n", currenthost); 1707 } else { 1708 if (havehost) 1709 (void) fprintf(fp, 1710 "current host remains %s\n", currenthost); 1711 else 1712 (void) fprintf(fp, "still no current host\n"); 1713 } 1714 } 1715 1716 1717 /* 1718 * keyid - get a keyid to use for authenticating requests 1719 */ 1720 static void 1721 keyid( 1722 struct parse *pcmd, 1723 FILE *fp 1724 ) 1725 { 1726 if (pcmd->nargs == 0) { 1727 if (info_auth_keyid == 0 && !keyid_entered) 1728 (void) fprintf(fp, "no keyid defined\n"); 1729 else if (info_auth_keyid == 0 && keyid_entered) 1730 (void) fprintf(fp, "no keyid will be sent\n"); 1731 else 1732 (void) fprintf(fp, "keyid is %lu\n", (u_long)info_auth_keyid); 1733 } else { 1734 info_auth_keyid = pcmd->argval[0].uval; 1735 keyid_entered = 1; 1736 } 1737 } 1738 1739 1740 /* 1741 * keytype - get type of key to use for authenticating requests 1742 */ 1743 static void 1744 keytype( 1745 struct parse *pcmd, 1746 FILE *fp 1747 ) 1748 { 1749 const char * digest_name; 1750 size_t digest_len; 1751 int key_type; 1752 1753 if (!pcmd->nargs) { 1754 fprintf(fp, "keytype is %s with %lu octet digests\n", 1755 keytype_name(info_auth_keytype), 1756 (u_long)info_auth_hashlen); 1757 return; 1758 } 1759 1760 digest_name = pcmd->argval[0].string; 1761 digest_len = 0; 1762 key_type = keytype_from_text(digest_name, &digest_len); 1763 1764 if (!key_type) { 1765 fprintf(fp, "keytype must be 'md5'%s\n", 1766 #ifdef OPENSSL 1767 " or a digest type provided by OpenSSL"); 1768 #else 1769 ""); 1770 #endif 1771 return; 1772 } 1773 1774 info_auth_keytype = key_type; 1775 info_auth_hashlen = digest_len; 1776 } 1777 1778 1779 /* 1780 * passwd - get an authentication key 1781 */ 1782 /*ARGSUSED*/ 1783 static void 1784 passwd( 1785 struct parse *pcmd, 1786 FILE *fp 1787 ) 1788 { 1789 char *pass; 1790 1791 if (info_auth_keyid == 0) { 1792 info_auth_keyid = getkeyid("Keyid: "); 1793 if (info_auth_keyid == 0) { 1794 (void)fprintf(fp, "Keyid must be defined\n"); 1795 return; 1796 } 1797 } 1798 if (pcmd->nargs >= 1) 1799 pass = pcmd->argval[0].string; 1800 else { 1801 pass = getpass_keytype(info_auth_keytype); 1802 if ('\0' == *pass) { 1803 fprintf(fp, "Password unchanged\n"); 1804 return; 1805 } 1806 } 1807 authusekey(info_auth_keyid, info_auth_keytype, (u_char *)pass); 1808 authtrust(info_auth_keyid, 1); 1809 } 1810 1811 1812 /* 1813 * hostnames - set the showhostnames flag 1814 */ 1815 static void 1816 hostnames( 1817 struct parse *pcmd, 1818 FILE *fp 1819 ) 1820 { 1821 if (pcmd->nargs == 0) { 1822 if (showhostnames) 1823 (void) fprintf(fp, "hostnames being shown\n"); 1824 else 1825 (void) fprintf(fp, "hostnames not being shown\n"); 1826 } else { 1827 if (STREQ(pcmd->argval[0].string, "yes")) 1828 showhostnames = 1; 1829 else if (STREQ(pcmd->argval[0].string, "no")) 1830 showhostnames = 0; 1831 else 1832 (void)fprintf(stderr, "What?\n"); 1833 } 1834 } 1835 1836 1837 /* 1838 * setdebug - set/change debugging level 1839 */ 1840 static void 1841 setdebug( 1842 struct parse *pcmd, 1843 FILE *fp 1844 ) 1845 { 1846 if (pcmd->nargs == 0) { 1847 (void) fprintf(fp, "debug level is %d\n", debug); 1848 return; 1849 } else if (STREQ(pcmd->argval[0].string, "no")) { 1850 debug = 0; 1851 } else if (STREQ(pcmd->argval[0].string, "more")) { 1852 debug++; 1853 } else if (STREQ(pcmd->argval[0].string, "less")) { 1854 debug--; 1855 } else { 1856 (void) fprintf(fp, "What?\n"); 1857 return; 1858 } 1859 (void) fprintf(fp, "debug level set to %d\n", debug); 1860 } 1861 1862 1863 /* 1864 * quit - stop this nonsense 1865 */ 1866 /*ARGSUSED*/ 1867 static void 1868 quit( 1869 struct parse *pcmd, 1870 FILE *fp 1871 ) 1872 { 1873 if (havehost) 1874 closesocket(sockfd); 1875 exit(0); 1876 } 1877 1878 1879 /* 1880 * version - print the current version number 1881 */ 1882 /*ARGSUSED*/ 1883 static void 1884 version( 1885 struct parse *pcmd, 1886 FILE *fp 1887 ) 1888 { 1889 1890 (void) fprintf(fp, "%s\n", Version); 1891 return; 1892 } 1893 1894 1895 static void __attribute__((__format__(__printf__, 1, 0))) 1896 vwarning(const char *fmt, va_list ap) 1897 { 1898 int serrno = errno; 1899 (void) fprintf(stderr, "%s: ", progname); 1900 vfprintf(stderr, fmt, ap); 1901 (void) fprintf(stderr, ": %s\n", strerror(serrno)); 1902 } 1903 1904 /* 1905 * warning - print a warning message 1906 */ 1907 static void __attribute__((__format__(__printf__, 1, 2))) 1908 warning( 1909 const char *fmt, 1910 ... 1911 ) 1912 { 1913 va_list ap; 1914 va_start(ap, fmt); 1915 vwarning(fmt, ap); 1916 va_end(ap); 1917 } 1918 1919 1920 /* 1921 * error - print a message and exit 1922 */ 1923 static void __attribute__((__format__(__printf__, 1, 2))) 1924 error( 1925 const char *fmt, 1926 ... 1927 ) 1928 { 1929 va_list ap; 1930 va_start(ap, fmt); 1931 vwarning(fmt, ap); 1932 va_end(ap); 1933 exit(1); 1934 } 1935 1936 /* 1937 * getkeyid - prompt the user for a keyid to use 1938 */ 1939 static u_long 1940 getkeyid( 1941 const char *keyprompt 1942 ) 1943 { 1944 int c; 1945 FILE *fi; 1946 char pbuf[20]; 1947 size_t i; 1948 size_t ilim; 1949 1950 #ifndef SYS_WINNT 1951 if ((fi = fdopen(open("/dev/tty", 2), "r")) == NULL) 1952 #else 1953 if ((fi = _fdopen(open("CONIN$", _O_TEXT), "r")) == NULL) 1954 #endif /* SYS_WINNT */ 1955 fi = stdin; 1956 else 1957 setbuf(fi, (char *)NULL); 1958 fprintf(stderr, "%s", keyprompt); fflush(stderr); 1959 for (i = 0, ilim = COUNTOF(pbuf) - 1; 1960 i < ilim && (c = getc(fi)) != '\n' && c != EOF; 1961 ) 1962 pbuf[i++] = (char)c; 1963 pbuf[i] = '\0'; 1964 if (fi != stdin) 1965 fclose(fi); 1966 1967 return (u_long) atoi(pbuf); 1968 } 1969