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