2 * ntpdc - control and monitor your ntpd daemon
20 #include <isc/result.h>
23 #include "ntp_select.h"
24 #include "ntp_stdlib.h"
25 #include "ntp_assert.h"
26 #include "ntp_lineedit.h"
28 #include "openssl/evp.h"
29 #include "openssl/objects.h"
31 #include <ssl_applink.c>
33 #include "ntp_libopts.h"
34 #include "ntpdc-opts.h"
37 /* vxWorks needs mode flag -casey*/
38 # define open(name, flags) open(name, flags, 0777)
39 # define SERVER_PORT_NUM 123
42 /* We use COMMAND as an autogen keyword */
48 * Because we now potentially understand a lot of commands (and
49 * it requires a lot of commands to talk to ntpd) we will run
50 * interactive if connected to a terminal.
52 static int interactive = 0; /* set to 1 when we should prompt */
53 static const char * prompt = "ntpdc> "; /* prompt to ask him about */
56 * Keyid used for authenticated requests. Obtained on the fly.
58 static u_long info_auth_keyid;
59 static int keyid_entered = 0;
61 static int info_auth_keytype = NID_md5; /* MD5 */
62 static size_t info_auth_hashlen = 16; /* MD5 */
63 u_long current_time; /* needed by authkeys; not used */
68 s_char sys_precision; /* local clock precision (log2 s) */
70 int ntpdcmain (int, char **);
72 * Built in command handler declarations
74 static int openhost (const char *);
75 static int sendpkt (void *, size_t);
76 static void growpktdata (void);
77 static int getresponse (int, int, int *, int *, char **, int);
78 static int sendrequest (int, int, int, u_int, size_t, char *);
79 static void getcmds (void);
80 static RETSIGTYPE abortcmd (int);
81 static void docmd (const char *);
82 static void tokenize (const char *, char **, int *);
83 static int findcmd (char *, struct xcmd *, struct xcmd *, struct xcmd **);
84 static int getarg (char *, int, arg_v *);
85 static int getnetnum (const char *, sockaddr_u *, char *, int);
86 static void help (struct parse *, FILE *);
87 static int helpsort (const void *, const void *);
88 static void printusage (struct xcmd *, FILE *);
89 static void timeout (struct parse *, FILE *);
90 static void my_delay (struct parse *, FILE *);
91 static void host (struct parse *, FILE *);
92 static void keyid (struct parse *, FILE *);
93 static void keytype (struct parse *, FILE *);
94 static void passwd (struct parse *, FILE *);
95 static void hostnames (struct parse *, FILE *);
96 static void setdebug (struct parse *, FILE *);
97 static void quit (struct parse *, FILE *);
98 static void version (struct parse *, FILE *);
99 static void warning (const char *, ...)
100 __attribute__((__format__(__printf__, 1, 2)));
101 static void error (const char *, ...)
102 __attribute__((__format__(__printf__, 1, 2)));
103 static u_long getkeyid (const char *);
108 * Built-in commands we understand
110 static struct xcmd builtins[] = {
111 { "?", help, { OPT|NTP_STR, NO, NO, NO },
112 { "command", "", "", "" },
113 "tell the use and syntax of commands" },
114 { "help", help, { OPT|NTP_STR, NO, NO, NO },
115 { "command", "", "", "" },
116 "tell the use and syntax of commands" },
117 { "timeout", timeout, { OPT|NTP_UINT, NO, NO, NO },
118 { "msec", "", "", "" },
119 "set the primary receive time out" },
120 { "delay", my_delay, { OPT|NTP_INT, NO, NO, NO },
121 { "msec", "", "", "" },
122 "set the delay added to encryption time stamps" },
123 { "host", host, { OPT|NTP_STR, OPT|NTP_STR, NO, NO },
124 { "-4|-6", "hostname", "", "" },
125 "specify the host whose NTP server we talk to" },
126 { "passwd", passwd, { OPT|NTP_STR, NO, NO, NO },
128 "specify a password to use for authenticated requests"},
129 { "hostnames", hostnames, { OPT|NTP_STR, NO, NO, NO },
130 { "yes|no", "", "", "" },
131 "specify whether hostnames or net numbers are printed"},
132 { "debug", setdebug, { OPT|NTP_STR, NO, NO, NO },
133 { "no|more|less", "", "", "" },
134 "set/change debugging level" },
135 { "quit", quit, { NO, NO, NO, NO },
138 { "exit", quit, { NO, NO, NO, NO },
141 { "keyid", keyid, { OPT|NTP_UINT, NO, NO, NO },
142 { "key#", "", "", "" },
143 "set/show keyid to use for authenticated requests" },
144 { "keytype", keytype, { OPT|NTP_STR, NO, NO, NO },
145 { "(md5|des)", "", "", "" },
146 "set/show key authentication type for authenticated requests (des|md5)" },
147 { "version", version, { NO, NO, NO, NO },
149 "print version number" },
150 { 0, 0, { NO, NO, NO, NO },
151 { "", "", "", "" }, "" }
156 * Default values we use.
158 #define DEFHOST "localhost" /* default host name */
159 #define DEFTIMEOUT (5) /* 5 second time out */
160 #define DEFSTIMEOUT (2) /* 2 second time out after first */
161 #define DEFDELAY 0x51EB852 /* 20 milliseconds, l_fp fraction */
162 #define LENHOSTNAME 256 /* host name is 256 characters long */
163 #define MAXCMDS 100 /* maximum commands on cmd line */
164 #define MAXHOSTS 200 /* maximum hosts on cmd line */
165 #define MAXLINE 512 /* maximum line length */
166 #define MAXTOKENS (1+1+MAXARGS+MOREARGS+2) /* maximum number of usable tokens */
167 #define SCREENWIDTH 78 /* nominal screen width in columns */
170 * Some variables used and manipulated locally
172 static struct sock_timeval tvout = { DEFTIMEOUT, 0 }; /* time out for reads */
173 static struct sock_timeval tvsout = { DEFSTIMEOUT, 0 };/* secondary time out */
174 static l_fp delay_time; /* delay time */
175 static char currenthost[LENHOSTNAME]; /* current host name */
176 int showhostnames = 1; /* show host names by default */
178 static int ai_fam_templ; /* address family */
179 static int ai_fam_default; /* default address family */
180 static SOCKET sockfd; /* fd socket is opened on */
181 static int havehost = 0; /* set to 1 when host open */
185 * Holds data returned from queries. We allocate INITDATASIZE
186 * octets to begin with, increasing this as we need to.
188 #define INITDATASIZE (sizeof(struct resp_pkt) * 16)
189 #define INCDATASIZE (sizeof(struct resp_pkt) * 8)
191 static char *pktdata;
192 static int pktdatasize;
195 * These are used to help the magic with old and new versions of ntpd.
197 int impl_ver = IMPL_XNTPD;
198 static int req_pkt_size = REQ_LEN_NOMAC;
201 * For commands typed on the command line (with the -c option)
203 static int numcmds = 0;
204 static const char *ccmds[MAXCMDS];
205 #define ADDCMD(cp) if (numcmds < MAXCMDS) ccmds[numcmds++] = (cp)
208 * When multiple hosts are specified.
210 static int numhosts = 0;
211 static const char *chosts[MAXHOSTS];
212 #define ADDHOST(cp) if (numhosts < MAXHOSTS) chosts[numhosts++] = (cp)
215 * Error codes for internal use
217 #define ERR_INCOMPLETE 16
218 #define ERR_TIMEOUT 17
221 * Macro definitions we use
223 #define ISSPACE(c) ((c) == ' ' || (c) == '\t')
224 #define ISEOL(c) ((c) == '\n' || (c) == '\r' || (c) == '\0')
225 #define STREQ(a, b) (*(a) == *(b) && strcmp((a), (b)) == 0)
228 * Jump buffer for longjumping back to the command level
230 static jmp_buf interrupt_buf;
231 static volatile int jump = 0;
234 * Pointer to current output unit
236 static FILE *current_output;
239 * Command table imported from ntpdc_ops.c
241 extern struct xcmd opcmds[];
245 #ifdef NO_MAIN_ALLOWED
246 CALL(ntpdc,"ntpdc",ntpdcmain);
254 return ntpdcmain(argc, argv);
259 void clear_globals(void)
261 showhostnames = 0; /* show host names by default */
262 havehost = 0; /* set to 1 when host open */
269 * main - parse arguments and handle options
279 delay_time.l_uf = DEFDELAY;
283 taskPrioritySet(taskIdSelf(), 100 );
286 init_lib(); /* sets up ipv4_works, ipv6_works */
290 /* Check to see if we have IPv6. Otherwise default to IPv4 */
292 ai_fam_default = AF_INET;
297 int optct = ntpOptionProcess(&ntpdcOptions, argc, argv);
303 ai_fam_templ = AF_INET;
304 else if (HAVE_OPT(IPV6))
305 ai_fam_templ = AF_INET6;
307 ai_fam_templ = ai_fam_default;
309 if (HAVE_OPT(COMMAND)) {
310 int cmdct = STACKCT_OPT( COMMAND );
311 const char** cmds = STACKLST_OPT( COMMAND );
313 while (cmdct-- > 0) {
318 debug = OPT_VALUE_SET_DEBUG_LEVEL;
320 if (HAVE_OPT(INTERACTIVE)) {
324 if (HAVE_OPT(NUMERIC)) {
328 if (HAVE_OPT(LISTPEERS)) {
332 if (HAVE_OPT(PEERS)) {
336 if (HAVE_OPT(SHOWPEERS)) {
340 if (ntp_optind == argc) {
343 for (; ntp_optind < argc; ntp_optind++)
344 ADDHOST(argv[ntp_optind]);
347 if (numcmds == 0 && interactive == 0
348 && isatty(fileno(stdin)) && isatty(fileno(stderr))) {
352 #ifndef SYS_WINNT /* Under NT cannot handle SIGINT, WIN32 spawns a handler */
354 (void) signal_no_reset(SIGINT, abortcmd);
355 #endif /* SYS_WINNT */
358 * Initialize the packet data buffer
360 pktdatasize = INITDATASIZE;
361 pktdata = emalloc(INITDATASIZE);
364 (void) openhost(chosts[0]);
370 for (ihost = 0; ihost < numhosts; ihost++) {
371 if (openhost(chosts[ihost]))
372 for (icmd = 0; icmd < numcmds; icmd++) {
374 printf ("--- %s ---\n",chosts[ihost]);
387 * openhost - open a socket to a host
394 char temphost[LENHOSTNAME];
396 struct addrinfo hints, *ai = NULL;
399 register const char *cp;
400 char name[LENHOSTNAME];
404 * We need to get by the [] if they were entered
411 for (i = 0; *cp && *cp != ']'; cp++, i++)
422 * First try to resolve it as an ip address and if that fails,
423 * do a fullblown (dns) lookup. That way we only use the dns
424 * when it is needed and work around some implementations that
425 * will return an "IPv4-mapped IPv6 address" address if you
426 * give it an IPv4 address to lookup.
428 strlcpy(service, "ntp", sizeof(service));
430 hints.ai_family = ai_fam_templ;
431 hints.ai_protocol = IPPROTO_UDP;
432 hints.ai_socktype = SOCK_DGRAM;
433 hints.ai_flags = Z_AI_NUMERICHOST;
435 a_info = getaddrinfo(hname, service, &hints, &ai);
436 if (a_info == EAI_NONAME
438 || a_info == EAI_NODATA
441 hints.ai_flags = AI_CANONNAME;
443 hints.ai_flags |= AI_ADDRCONFIG;
445 a_info = getaddrinfo(hname, service, &hints, &ai);
447 /* Some older implementations don't like AI_ADDRCONFIG. */
448 if (a_info == EAI_BADFLAGS) {
449 hints.ai_flags = AI_CANONNAME;
450 a_info = getaddrinfo(hname, service, &hints, &ai);
453 fprintf(stderr, "%s\n", gai_strerror(a_info));
460 * getaddrinfo() has returned without error so ai should not
465 octets = min(sizeof(addr), ai->ai_addrlen);
466 memcpy(&addr, ai->ai_addr, octets);
468 if (ai->ai_canonname == NULL)
469 strlcpy(temphost, stoa(&addr), sizeof(temphost));
471 strlcpy(temphost, ai->ai_canonname, sizeof(temphost));
474 printf("Opening host %s\n", temphost);
478 printf("Closing old host %s\n", currenthost);
482 strlcpy(currenthost, temphost, sizeof(currenthost));
484 /* port maps to the same in both families */
485 s_port = NSRCPORT(&addr);;
487 ((struct sockaddr_in6 *)&hostaddr)->sin6_port = htons(SERVER_PORT_NUM);
488 if (ai->ai_family == AF_INET)
489 *(struct sockaddr_in *)&hostaddr=
490 *((struct sockaddr_in *)ai->ai_addr);
492 *(struct sockaddr_in6 *)&hostaddr=
493 *((struct sockaddr_in6 *)ai->ai_addr);
494 #endif /* SYS_VXWORKS */
498 int optionValue = SO_SYNCHRONOUS_NONALERT;
501 err = setsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char *)&optionValue, sizeof(optionValue));
502 if (err != NO_ERROR) {
503 (void) fprintf(stderr, "cannot open nonoverlapped sockets\n");
507 #endif /* SYS_WINNT */
509 sockfd = socket(ai->ai_family, SOCK_DGRAM, 0);
510 if (sockfd == INVALID_SOCKET) {
515 #ifdef NEED_RCVBUF_SLOP
518 int rbufsize = INITDATASIZE + 2048; /* 2K for slop */
520 if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF,
521 &rbufsize, sizeof(int)) == -1)
528 if (connect(sockfd, (struct sockaddr *)&hostaddr,
529 sizeof(hostaddr)) == -1) {
531 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) == -1) {
532 #endif /* SYS_VXWORKS */
539 req_pkt_size = REQ_LEN_NOMAC;
540 impl_ver = IMPL_XNTPD;
545 /* XXX ELIMINATE sendpkt similar in ntpq.c, ntpdc.c, ntp_io.c, ntptrace.c */
547 * sendpkt - send a packet to the remote host
555 if (send(sockfd, xdata, xdatalen, 0) == -1) {
556 warning("write to %s failed", currenthost);
565 * growpktdata - grow the packet data area
572 priorsz = (size_t)pktdatasize;
573 pktdatasize += INCDATASIZE;
574 pktdata = erealloc_zero(pktdata, (size_t)pktdatasize, priorsz);
579 * getresponse - get a (series of) response packet(s) and return the data
591 struct resp_pkt rpkt;
592 struct sock_timeval tvo;
599 char haveseq[MAXSEQ+1];
609 * This is pretty tricky. We may get between 1 and many packets
610 * back in response to the request. We peel the data out of
611 * each packet and collect it in one long block. When the last
612 * packet in the sequence is received we'll know how many we
613 * should have had. Note we use one long time out, should reconsider.
619 *rdata = datap = pktdata;
620 lastseq = 999; /* too big to be a sequence number */
630 FD_SET(sockfd, &fds);
631 n = select(sockfd+1, &fds, (fd_set *)0, (fd_set *)0, &tvo);
634 warning("select fails");
639 * Timed out. Return what we have
642 (void) fprintf(stderr,
643 "%s: timed out, nothing received\n", currenthost);
646 (void) fprintf(stderr,
647 "%s: timed out with incomplete data\n",
650 printf("Received sequence numbers");
651 for (n = 0; n <= MAXSEQ; n++)
655 printf(" last frame received\n");
657 printf(" last frame not received\n");
659 return ERR_INCOMPLETE;
663 n = recv(sockfd, (char *)&rpkt, sizeof(rpkt), 0);
671 * Check for format errors. Bug proofing.
673 if (n < (ssize_t)RESP_HEADER_SIZE) {
675 printf("Short (%zd byte) packet received\n", n);
678 if (INFO_VERSION(rpkt.rm_vn_mode) > NTP_VERSION ||
679 INFO_VERSION(rpkt.rm_vn_mode) < NTP_OLDVERSION) {
681 printf("Packet received with version %d\n",
682 INFO_VERSION(rpkt.rm_vn_mode));
685 if (INFO_MODE(rpkt.rm_vn_mode) != MODE_PRIVATE) {
687 printf("Packet received with mode %d\n",
688 INFO_MODE(rpkt.rm_vn_mode));
691 if (INFO_IS_AUTH(rpkt.auth_seq)) {
693 printf("Encrypted packet received\n");
696 if (!ISRESPONSE(rpkt.rm_vn_mode)) {
698 printf("Received request packet, wanted response\n");
701 if (INFO_MBZ(rpkt.mbz_itemsize) != 0) {
703 printf("Received packet with nonzero MBZ field!\n");
708 * Check implementation/request. Could be old data getting to us.
710 if (rpkt.implementation != implcode || rpkt.request != reqcode) {
713 "Received implementation/request of %d/%d, wanted %d/%d",
714 rpkt.implementation, rpkt.request,
720 * Check the error code. If non-zero, return it.
722 if (INFO_ERR(rpkt.err_nitems) != INFO_OKAY) {
723 if (debug && ISMORE(rpkt.rm_vn_mode)) {
724 printf("Error code %d received on not-final packet\n",
725 INFO_ERR(rpkt.err_nitems));
727 return (int)INFO_ERR(rpkt.err_nitems);
731 * Collect items and size. Make sure they make sense.
733 items = INFO_NITEMS(rpkt.err_nitems);
734 size = INFO_ITEMSIZE(rpkt.mbz_itemsize);
739 datasize = items * size;
740 if ((size_t)datasize > (n-RESP_HEADER_SIZE)) {
743 "Received items %d, size %d (total %d), data in packet is %zu\n",
744 items, size, datasize, n-RESP_HEADER_SIZE);
749 * If this isn't our first packet, make sure the size matches
752 if (!firstpkt && size != *rsize) {
754 printf("Received itemsize %d, previous %d\n",
759 * If we've received this before, +toss it
761 seq = INFO_SEQ(rpkt.auth_seq);
764 printf("Received duplicate sequence number %d\n", seq);
770 * If this is the last in the sequence, record that.
772 if (!ISMORE(rpkt.rm_vn_mode)) {
773 if (lastseq != 999) {
774 printf("Received second end sequence packet\n");
781 * So far, so good. Copy this data into the output array.
783 if ((datap + datasize + (pad * items)) > (pktdata + pktdatasize)) {
784 int offset = datap - pktdata;
786 *rdata = pktdata; /* might have been realloced ! */
787 datap = pktdata + offset;
790 * We now move the pointer along according to size and number of
791 * items. This is so we can play nice with older implementations
794 tmp_data = rpkt.u.data;
795 for (i = 0; i < items; i++) {
796 memcpy(datap, tmp_data, (unsigned)size);
798 zero_mem(datap + size, pad);
809 * Finally, check the count of received packets. If we've got them
813 if (numrecv <= lastseq)
820 * sendrequest - format and send a request packet
822 * Historically, ntpdc has used a fixed-size request packet regardless
823 * of the actual payload size. When authenticating, the timestamp, key
824 * ID, and digest have been placed just before the end of the packet.
825 * With the introduction in late 2009 of support for authenticated
826 * ntpdc requests using larger 20-octet digests (vs. 16 for MD5), we
827 * come up four bytes short.
829 * To maintain interop while allowing for larger digests, the behavior
830 * is unchanged when using 16-octet digests. For larger digests, the
831 * timestamp, key ID, and digest are placed immediately following the
832 * request payload, with the overall packet size variable. ntpd can
833 * distinguish 16-octet digests by the overall request size being
834 * REQ_LEN_NOMAC + 4 + 16 with the auth bit enabled. When using a
835 * longer digest, that request size should be avoided.
837 * With the form used with 20-octet and larger digests, the timestamp,
838 * key ID, and digest are located by ntpd relative to the start of the
839 * packet, and the size of the digest is then implied by the packet
862 qpkt.rm_vn_mode = RM_VN_MODE(0, 0, 0);
863 qpkt.implementation = (u_char)implcode;
864 qpkt.request = (u_char)reqcode;
866 datasize = qitems * qsize;
867 if (datasize && qdata != NULL) {
868 memcpy(qpkt.u.data, qdata, datasize);
869 qpkt.err_nitems = ERR_NITEMS(0, qitems);
870 qpkt.mbz_itemsize = MBZ_ITEMSIZE(qsize);
872 qpkt.err_nitems = ERR_NITEMS(0, 0);
873 qpkt.mbz_itemsize = MBZ_ITEMSIZE(qsize); /* allow for optional first item */
876 if (!auth || (keyid_entered && info_auth_keyid == 0)) {
877 qpkt.auth_seq = AUTH_SEQ(0, 0);
878 return sendpkt(&qpkt, req_pkt_size);
881 if (info_auth_keyid == 0) {
882 key_id = getkeyid("Keyid: ");
884 fprintf(stderr, "Invalid key identifier\n");
887 info_auth_keyid = key_id;
889 if (!authistrusted(info_auth_keyid)) {
890 pass = getpass_keytype(info_auth_keytype);
891 if ('\0' == pass[0]) {
892 fprintf(stderr, "Invalid password\n");
895 authusekey(info_auth_keyid, info_auth_keytype,
897 authtrust(info_auth_keyid, 1);
899 qpkt.auth_seq = AUTH_SEQ(1, 0);
900 if (info_auth_hashlen > 16) {
902 * Only ntpd which expects REQ_LEN_NOMAC plus maclen
903 * octets in an authenticated request using a 16 octet
904 * digest (that is, a newer ntpd) will handle digests
905 * larger than 16 octets, so for longer digests, do
906 * not attempt to shorten the requests for downlevel
907 * ntpd compatibility.
909 if (REQ_LEN_NOMAC != req_pkt_size)
911 reqsize = REQ_LEN_HDR + datasize + sizeof(*ptstamp);
912 /* align to 32 bits */
913 reqsize = (reqsize + 3) & ~3;
915 reqsize = req_pkt_size;
916 ptstamp = (void *)((char *)&qpkt + reqsize);
919 L_ADD(&ts, &delay_time);
920 HTONL_FP(&ts, ptstamp);
921 maclen = authencrypt(info_auth_keyid, (void *)&qpkt, reqsize);
923 fprintf(stderr, "Key not found\n");
925 } else if (maclen != (int)(info_auth_hashlen + sizeof(keyid_t))) {
927 "%d octet MAC, %zu expected with %zu octet digest\n",
928 maclen, (info_auth_hashlen + sizeof(keyid_t)),
932 return sendpkt(&qpkt, reqsize + maclen);
937 * doquery - send a request and process the response
957 struct sock_timeval tvzero;
960 * Check to make sure host is open
963 (void) fprintf(stderr, "***No host open, use `host' command\n");
968 * Poll the socket and clear out any pending data
972 tvzero.tv_sec = tvzero.tv_usec = 0;
974 FD_SET(sockfd, &fds);
975 res = select(sockfd+1, &fds, (fd_set *)0, (fd_set *)0, &tvzero);
978 warning("polling select");
982 (void) recv(sockfd, junk, sizeof junk, 0);
989 res = sendrequest(implcode, reqcode, auth, qitems, qsize, qdata);
994 * Get the response. If we got a standard error, print a message
996 res = getresponse(implcode, reqcode, ritems, rsize, rdata, esize);
999 * Try to be compatible with older implementations of ntpd.
1001 if (res == INFO_ERR_FMT && req_pkt_size != 48) {
1004 oldsize = req_pkt_size;
1006 switch(req_pkt_size) {
1014 if (impl_ver == IMPL_XNTPD) {
1016 "***Warning changing to older implementation\n");
1017 return INFO_ERR_IMPL;
1021 "***Warning changing the request packet size from %d to %d\n",
1022 oldsize, req_pkt_size);
1026 /* log error message if not told to be quiet */
1027 if ((res > 0) && (((1 << res) & quiet_mask) == 0)) {
1030 /* Give us a chance to try the older implementation. */
1031 if (implcode == IMPL_XNTPD)
1033 (void) fprintf(stderr,
1034 "***Server implementation incompatible with our own\n");
1037 (void) fprintf(stderr,
1038 "***Server doesn't implement this request\n");
1041 (void) fprintf(stderr,
1042 "***Server reports a format error in the received packet (shouldn't happen)\n");
1044 case INFO_ERR_NODATA:
1045 (void) fprintf(stderr,
1046 "***Server reports data not found\n");
1049 (void) fprintf(stderr, "***Permission denied\n");
1052 (void) fprintf(stderr, "***Request timed out\n");
1054 case ERR_INCOMPLETE:
1055 (void) fprintf(stderr,
1056 "***Response from server was incomplete\n");
1059 (void) fprintf(stderr,
1060 "***Server returns unknown error code %d\n", res);
1069 * getcmds - read commands from the standard input and execute them
1077 ntp_readline_init(interactive ? prompt : NULL);
1080 line = ntp_readline(&count);
1087 ntp_readline_uninit();
1091 #ifndef SYS_WINNT /* Under NT cannot handle SIGINT, WIN32 spawns a handler */
1093 * abortcmd - catch interrupts and abort the current command
1101 if (current_output == stdout)
1102 (void) fflush(stdout);
1104 (void) fflush(stderr);
1105 if (jump) longjmp(interrupt_buf, 1);
1107 #endif /* SYS_WINNT */
1110 * docmd - decode the command line and execute a command
1117 char *tokens[1+MAXARGS+MOREARGS+2];
1124 ai_fam_templ = ai_fam_default;
1126 * Tokenize the command line. If nothing on it, return.
1128 if (strlen(cmdline) >= MAXLINE) {
1129 fprintf(stderr, "***Command ignored, more than %d characters:\n%s\n",
1130 MAXLINE - 1, cmdline);
1133 tokenize(cmdline, tokens, &ntok);
1138 * Find the appropriate command description.
1140 i = findcmd(tokens[0], builtins, opcmds, &xcmd);
1142 (void) fprintf(stderr, "***Command `%s' unknown\n",
1145 } else if (i >= 2) {
1146 (void) fprintf(stderr, "***Command `%s' ambiguous\n",
1152 * Save the keyword, then walk through the arguments, interpreting
1155 pcmd.keyword = tokens[0];
1158 for (i = 0; i < MAXARGS && xcmd->arg[i] != NO;) {
1159 if ((i+ti) >= ntok) {
1160 if (!(xcmd->arg[i] & OPT)) {
1161 printusage(xcmd, stderr);
1166 if ((xcmd->arg[i] & OPT) && (*tokens[i+ti] == '>'))
1168 rval = getarg(tokens[i+ti], (int)xcmd->arg[i], &pcmd.argval[i]);
1179 /* Any extra args are assumed to be "OPT|NTP_STR". */
1180 for ( ; i < MAXARGS + MOREARGS;) {
1183 rval = getarg(tokens[i+ti], (int)(OPT|NTP_STR), &pcmd.argval[i]);
1195 if (i < ntok && *tokens[i] == '>') {
1198 if (*(tokens[i]+1) != '\0')
1199 fname = tokens[i]+1;
1200 else if ((i+1) < ntok)
1201 fname = tokens[i+1];
1203 (void) fprintf(stderr, "***No file for redirect\n");
1207 current_output = fopen(fname, "w");
1208 if (current_output == NULL) {
1209 (void) fprintf(stderr, "***Error opening %s: ", fname);
1214 current_output = stdout;
1217 if (interactive && setjmp(interrupt_buf)) {
1221 (xcmd->handler)(&pcmd, current_output);
1223 if (current_output != stdout)
1224 (void) fclose(current_output);
1225 current_output = NULL;
1231 * tokenize - turn a command line into tokens
1240 register const char *cp;
1242 static char tspace[MAXLINE];
1246 for (*ntok = 0; *ntok < MAXTOKENS; (*ntok)++) {
1248 while (ISSPACE(*cp))
1254 } while (!ISSPACE(*cp) && !ISEOL(*cp));
1263 * findcmd - find a command in a command description table
1268 struct xcmd *clist1,
1269 struct xcmd *clist2,
1273 register struct xcmd *cl;
1276 struct xcmd *nearmatch = NULL;
1283 else if (clist2 != 0)
1289 for (cl = clist; cl->keyword != 0; cl++) {
1290 /* do a first character check, for efficiency */
1291 if (*str != *(cl->keyword))
1293 if (strncmp(str, cl->keyword, (unsigned)clen) == 0) {
1295 * Could be extact match, could be approximate.
1296 * Is exact if the length of the keyword is the
1299 if (*((cl->keyword) + clen) == '\0') {
1309 * See if there is more to do. If so, go again. Sorry about the
1310 * goto, too much looking at BSD sources...
1312 if (clist == clist1 && clist2 != 0) {
1318 * If we got extactly 1 near match, use it, else return number
1330 * getarg - interpret an argument token
1332 * string is always set.
1333 * type is set to the decoded type.
1335 * return: 0 - failure
1337 * -1 - skip to next token
1348 static const char *digits = "0123456789";
1352 argp->type = code & ~OPT;
1354 switch (argp->type) {
1358 if (!strcmp("-6", str)) {
1359 ai_fam_templ = AF_INET6;
1361 } else if (!strcmp("-4", str)) {
1362 ai_fam_templ = AF_INET;
1365 if (!getnetnum(str, &(argp->netnum), (char *)0, 0)) {
1380 cp = strchr(digits, *np);
1382 (void) fprintf(stderr,
1383 "***Illegal integer value %s\n", str);
1387 argp->uval += (cp - digits);
1388 } while (*(++np) != '\0');
1391 if ((code & ~OPT) == NTP_UINT) {
1392 (void) fprintf(stderr,
1393 "***Value %s should be unsigned\n", str);
1396 argp->ival = -argp->ival;
1400 if (!strcmp("-6", str))
1402 else if (!strcmp("-4", str))
1405 (void) fprintf(stderr,
1406 "***Version must be either 4 or 6\n");
1417 * getnetnum - given a host name, return its net number
1418 * and (optional) full name
1428 struct addrinfo hints, *ai = NULL;
1431 hints.ai_flags = AI_CANONNAME;
1432 #ifdef AI_ADDRCONFIG
1433 hints.ai_flags |= AI_ADDRCONFIG;
1437 * decodenetnum only works with addresses, but handles syntax
1438 * that getaddrinfo doesn't: [2001::1]:1234
1440 if (decodenetnum(hname, num)) {
1441 if (fullhost != NULL)
1442 getnameinfo(&num->sa, SOCKLEN(num), fullhost,
1443 LENHOSTNAME, NULL, 0, 0);
1445 } else if (getaddrinfo(hname, "ntp", &hints, &ai) == 0) {
1446 NTP_INSIST(sizeof(*num) >= ai->ai_addrlen);
1447 memcpy(num, ai->ai_addr, ai->ai_addrlen);
1448 if (fullhost != NULL) {
1449 if (ai->ai_canonname != NULL)
1450 strlcpy(fullhost, ai->ai_canonname,
1453 getnameinfo(&num->sa, SOCKLEN(num),
1454 fullhost, LENHOSTNAME, NULL,
1459 fprintf(stderr, "***Can't find host %s\n", hname);
1466 * nntohost - convert network number to host name. This routine enforces
1467 * the showhostnames setting.
1474 if (!showhostnames || SOCK_UNSPEC(netnum))
1475 return stoa(netnum);
1476 else if (ISREFCLOCKADR(netnum))
1477 return refnumtoa(netnum);
1479 return socktohost(netnum);
1484 * Finally, the built in command handlers
1488 * help - tell about commands, or details of a particular command
1498 const char *list[100];
1504 if (pcmd->nargs == 0) {
1506 for (xcp = builtins; xcp->keyword != 0; xcp++) {
1507 if (*(xcp->keyword) != '?')
1508 list[words++] = xcp->keyword;
1510 for (xcp = opcmds; xcp->keyword != 0; xcp++)
1511 list[words++] = xcp->keyword;
1513 qsort((void *)list, words, sizeof(list[0]), helpsort);
1515 for (word = 0; word < words; word++) {
1516 length = strlen(list[word]);
1517 col = max(col, length);
1520 cols = SCREENWIDTH / ++col;
1521 rows = (words + cols - 1) / cols;
1523 fprintf(fp, "ntpdc commands:\n");
1525 for (row = 0; row < rows; row++) {
1526 for (word = row; word < words; word += rows)
1527 fprintf(fp, "%-*.*s", (int)col,
1528 (int)col - 1, list[word]);
1532 cmd = pcmd->argval[0].string;
1533 words = findcmd(cmd, builtins, opcmds, &xcp);
1536 "Command `%s' is unknown\n", cmd);
1538 } else if (words >= 2) {
1540 "Command `%s' is ambiguous\n", cmd);
1543 fprintf(fp, "function: %s\n", xcp->comment);
1544 printusage(xcp, fp);
1550 * helpsort - do hostname qsort comparisons
1558 const char * const * name1 = t1;
1559 const char * const * name2 = t2;
1561 return strcmp(*name1, *name2);
1566 * printusage - print usage information for a command
1577 (void) fprintf(fp, "usage: %s", xcp->keyword);
1578 for (i = 0; i < MAXARGS && xcp->arg[i] != NO; i++) {
1579 if (opt46 == 0 && (xcp->arg[i] & ~OPT) == NTP_ADD) {
1580 (void) fprintf(fp, " [ -4|-6 ]");
1583 if (xcp->arg[i] & OPT)
1584 (void) fprintf(fp, " [ %s ]", xcp->desc[i]);
1586 (void) fprintf(fp, " %s", xcp->desc[i]);
1588 (void) fprintf(fp, "\n");
1593 * timeout - set time out time
1603 if (pcmd->nargs == 0) {
1604 val = tvout.tv_sec * 1000 + tvout.tv_usec / 1000;
1605 (void) fprintf(fp, "primary timeout %d ms\n", val);
1607 tvout.tv_sec = pcmd->argval[0].uval / 1000;
1608 tvout.tv_usec = (pcmd->argval[0].uval - (tvout.tv_sec * 1000))
1615 * my_delay - set delay for auth requests
1626 if (pcmd->nargs == 0) {
1627 val = delay_time.l_ui * 1000 + delay_time.l_uf / 4294967;
1628 (void) fprintf(fp, "delay %lu ms\n", val);
1630 if (pcmd->argval[0].ival < 0) {
1632 val = (u_long)(-pcmd->argval[0].ival);
1635 val = (u_long)pcmd->argval[0].ival;
1638 delay_time.l_ui = val / 1000;
1640 delay_time.l_uf = val * 4294967; /* 2**32/1000 */
1649 * host - set the host we are dealing with.
1659 if (pcmd->nargs == 0) {
1661 (void) fprintf(fp, "current host is %s\n", currenthost);
1663 (void) fprintf(fp, "no current host\n");
1668 if (pcmd->nargs == 2) {
1669 if (!strcmp("-4", pcmd->argval[i].string))
1670 ai_fam_templ = AF_INET;
1671 else if (!strcmp("-6", pcmd->argval[i].string))
1672 ai_fam_templ = AF_INET6;
1676 "current host remains %s\n", currenthost);
1678 (void) fprintf(fp, "still no current host\n");
1683 if (openhost(pcmd->argval[i].string)) {
1684 (void) fprintf(fp, "current host set to %s\n", currenthost);
1688 "current host remains %s\n", currenthost);
1690 (void) fprintf(fp, "still no current host\n");
1696 * keyid - get a keyid to use for authenticating requests
1704 if (pcmd->nargs == 0) {
1705 if (info_auth_keyid == 0 && !keyid_entered)
1706 (void) fprintf(fp, "no keyid defined\n");
1707 else if (info_auth_keyid == 0 && keyid_entered)
1708 (void) fprintf(fp, "no keyid will be sent\n");
1710 (void) fprintf(fp, "keyid is %lu\n", (u_long)info_auth_keyid);
1712 info_auth_keyid = pcmd->argval[0].uval;
1719 * keytype - get type of key to use for authenticating requests
1727 const char * digest_name;
1732 fprintf(fp, "keytype is %s with %lu octet digests\n",
1733 keytype_name(info_auth_keytype),
1734 (u_long)info_auth_hashlen);
1738 digest_name = pcmd->argval[0].string;
1740 key_type = keytype_from_text(digest_name, &digest_len);
1743 fprintf(fp, "keytype must be 'md5'%s\n",
1745 " or a digest type provided by OpenSSL");
1752 info_auth_keytype = key_type;
1753 info_auth_hashlen = digest_len;
1758 * passwd - get an authentication key
1769 if (info_auth_keyid == 0) {
1770 info_auth_keyid = getkeyid("Keyid: ");
1771 if (info_auth_keyid == 0) {
1772 (void)fprintf(fp, "Keyid must be defined\n");
1776 if (pcmd->nargs >= 1)
1777 pass = pcmd->argval[0].string;
1779 pass = getpass_keytype(info_auth_keytype);
1780 if ('\0' == *pass) {
1781 fprintf(fp, "Password unchanged\n");
1785 authusekey(info_auth_keyid, info_auth_keytype, (u_char *)pass);
1786 authtrust(info_auth_keyid, 1);
1791 * hostnames - set the showhostnames flag
1799 if (pcmd->nargs == 0) {
1801 (void) fprintf(fp, "hostnames being shown\n");
1803 (void) fprintf(fp, "hostnames not being shown\n");
1805 if (STREQ(pcmd->argval[0].string, "yes"))
1807 else if (STREQ(pcmd->argval[0].string, "no"))
1810 (void)fprintf(stderr, "What?\n");
1816 * setdebug - set/change debugging level
1824 if (pcmd->nargs == 0) {
1825 (void) fprintf(fp, "debug level is %d\n", debug);
1827 } else if (STREQ(pcmd->argval[0].string, "no")) {
1829 } else if (STREQ(pcmd->argval[0].string, "more")) {
1831 } else if (STREQ(pcmd->argval[0].string, "less")) {
1834 (void) fprintf(fp, "What?\n");
1837 (void) fprintf(fp, "debug level set to %d\n", debug);
1842 * quit - stop this nonsense
1852 closesocket(sockfd);
1858 * version - print the current version number
1868 (void) fprintf(fp, "%s\n", Version);
1873 static void __attribute__((__format__(__printf__, 1, 0)))
1874 vwarning(const char *fmt, va_list ap)
1877 (void) fprintf(stderr, "%s: ", progname);
1878 vfprintf(stderr, fmt, ap);
1879 (void) fprintf(stderr, ": %s\n", strerror(serrno));
1883 * warning - print a warning message
1885 static void __attribute__((__format__(__printf__, 1, 2)))
1899 * error - print a message and exit
1901 static void __attribute__((__format__(__printf__, 1, 2)))
1915 * getkeyid - prompt the user for a keyid to use
1919 const char *keyprompt
1929 if ((fi = fdopen(open("/dev/tty", 2), "r")) == NULL)
1931 if ((fi = _fdopen(open("CONIN$", _O_TEXT), "r")) == NULL)
1932 #endif /* SYS_WINNT */
1935 setbuf(fi, (char *)NULL);
1936 fprintf(stderr, "%s", keyprompt); fflush(stderr);
1937 for (i = 0, ilim = COUNTOF(pbuf) - 1;
1938 i < ilim && (c = getc(fi)) != '\n' && c != EOF;
1940 pbuf[i++] = (char)c;
1945 return (u_long) atoi(pbuf);