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freebsd-skq/contrib/ntp/ntpq/ntpq.c
roberto f77146900e Virgin import of ntpd 4.1.1a
2002-10-29 19:58:12 +00:00

3116 lines
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/*
* ntpq - query an NTP server using mode 6 commands
*/
#include <stdio.h>
#include "ntpq.h"
#include "ntp_unixtime.h"
#include "ntp_calendar.h"
#include "ntp_io.h"
#include "ntp_select.h"
#include "ntp_stdlib.h"
#include <ctype.h>
#include <signal.h>
#include <setjmp.h>
#include <netdb.h>
#ifdef SYS_WINNT
# include <io.h>
#else
#define closesocket close
#endif /* SYS_WINNT */
#ifdef HAVE_LIBREADLINE
# include <readline/readline.h>
# include <readline/history.h>
#endif /* HAVE_LIBREADLINE */
#ifdef SYS_VXWORKS
/* vxWorks needs mode flag -casey*/
#define open(name, flags) open(name, flags, 0777)
#define SERVER_PORT_NUM 123
#endif
/*
* Because we potentially understand a lot of commands we will run
* interactive if connected to a terminal.
*/
int interactive = 0; /* set to 1 when we should prompt */
const char *prompt = "ntpq> "; /* prompt to ask him about */
/*
* Keyid used for authenticated requests. Obtained on the fly.
*/
u_long info_auth_keyid = NTP_MAXKEY;
/*
* Type of key md5 or des
*/
#define KEY_TYPE_DES 3
#define KEY_TYPE_MD5 4
static int info_auth_keytype = KEY_TYPE_MD5; /* MD5 */
u_long current_time; /* needed by authkeys; not used */
/*
* Flag which indicates we should always send authenticated requests
*/
int always_auth = 0;
/*
* Flag which indicates raw mode output.
*/
int rawmode = 0;
/*
* Packet version number we use
*/
u_char pktversion = NTP_OLDVERSION + 1;
/*
* Don't jump if no set jmp.
*/
volatile int jump = 0;
/*
* Format values
*/
#define PADDING 0
#define TS 1 /* time stamp */
#define FL 2 /* l_fp type value */
#define FU 3 /* u_fp type value */
#define FS 4 /* s_fp type value */
#define UI 5 /* unsigned integer value */
#define SI 6 /* signed integer value */
#define HA 7 /* host address */
#define NA 8 /* network address */
#define ST 9 /* string value */
#define RF 10 /* refid (sometimes string, sometimes not) */
#define LP 11 /* leap (print in binary) */
#define OC 12 /* integer, print in octal */
#define MD 13 /* mode */
#define AR 14 /* array of times */
#define FX 15 /* test flags */
#define EOV 255 /* end of table */
/*
* System variable values. The array can be indexed by
* the variable index to find the textual name.
*/
struct ctl_var sys_var[] = {
{ 0, PADDING, "" }, /* 0 */
{ CS_LEAP, LP, "leap" }, /* 1 */
{ CS_STRATUM, UI, "stratum" }, /* 2 */
{ CS_PRECISION, SI, "precision" }, /* 3 */
{ CS_ROOTDELAY, FS, "rootdelay" }, /* 4 */
{ CS_ROOTDISPERSION, FU, "rootdispersion" }, /* 5 */
{ CS_REFID, RF, "refid" }, /* 6 */
{ CS_REFTIME, TS, "reftime" }, /* 7 */
{ CS_POLL, UI, "poll" }, /* 8 */
{ CS_PEERID, UI, "peer" }, /* 9 */
{ CS_STATE, UI, "state" }, /* 10 */
{ CS_OFFSET, FL, "offset" }, /* 11 */
{ CS_DRIFT, FS, "frequency" }, /* 12 */
{ CS_JITTER, FU, "jitter" }, /* 13 */
{ CS_CLOCK, TS, "clock" }, /* 14 */
{ CS_PROCESSOR, ST, "processor" }, /* 15 */
{ CS_SYSTEM, ST, "system" }, /* 16 */
{ CS_VERSION, ST, "version" }, /* 17 */
{ CS_STABIL, FS, "stability" }, /* 18 */
{ CS_VARLIST, ST, "sys_var_list" }, /* 19 */
{ 0, EOV, "" }
};
/*
* Peer variable list
*/
struct ctl_var peer_var[] = {
{ 0, PADDING, "" }, /* 0 */
{ CP_CONFIG, UI, "config" }, /* 1 */
{ CP_AUTHENABLE, UI, "authenable" }, /* 2 */
{ CP_AUTHENTIC, UI, "authentic" }, /* 3 */
{ CP_SRCADR, HA, "srcadr" }, /* 4 */
{ CP_SRCPORT, UI, "srcport" }, /* 5 */
{ CP_DSTADR, NA, "dstadr" }, /* 6 */
{ CP_DSTPORT, UI, "dstport" }, /* 7 */
{ CP_LEAP, LP, "leap" }, /* 8 */
{ CP_HMODE, MD, "hmode" }, /* 9 */
{ CP_STRATUM, UI, "stratum" }, /* 10 */
{ CP_PPOLL, UI, "ppoll" }, /* 11 */
{ CP_HPOLL, UI, "hpoll" }, /* 12 */
{ CP_PRECISION, SI, "precision" }, /* 13 */
{ CP_ROOTDELAY, FS, "rootdelay" }, /* 14 */
{ CP_ROOTDISPERSION, FU, "rootdispersion" }, /* 15 */
{ CP_REFID, RF, "refid" }, /* 16 */
{ CP_REFTIME, TS, "reftime" }, /* 17 */
{ CP_ORG, TS, "org" }, /* 18 */
{ CP_REC, TS, "rec" }, /* 19 */
{ CP_XMT, TS, "xmt" }, /* 20 */
{ CP_REACH, OC, "reach" }, /* 21 */
{ CP_VALID, UI, "valid" }, /* 22 */
{ CP_TIMER, UI, "timer" }, /* 23 */
{ CP_DELAY, FS, "delay" }, /* 24 */
{ CP_OFFSET, FL, "offset" }, /* 25 */
{ CP_JITTER, FU, "jitter" }, /* 26 */
{ CP_DISPERSION, FU, "dispersion" }, /* 27 */
{ CP_KEYID, UI, "keyid" }, /* 28 */
{ CP_FILTDELAY, AR, "filtdelay" }, /* 29 */
{ CP_FILTOFFSET, AR, "filtoffset" }, /* 30 */
{ CP_PMODE, ST, "pmode" }, /* 31 */
{ CP_RECEIVED, UI, "received" }, /* 32 */
{ CP_SENT, UI, "sent" }, /* 33 */
{ CP_FILTERROR, AR, "filtdisp" }, /* 34 */
{ CP_FLASH, FX, "flash" }, /* 35 */
{ CP_TTL, UI, "ttl" }, /* 36 */
{ CP_TTLMAX, UI, "ttlmax" }, /* 37 */
/*
* These are duplicate entries so that we can
* process deviant version of the ntp protocol.
*/
{ CP_SRCADR, HA, "peeraddr" }, /* 4 */
{ CP_SRCPORT, UI, "peerport" }, /* 5 */
{ CP_PPOLL, UI, "peerpoll" }, /* 11 */
{ CP_HPOLL, UI, "hostpoll" }, /* 12 */
{ CP_FILTERROR, AR, "filterror" }, /* 34 */
{ 0, EOV, "" }
};
/*
* Clock variable list
*/
struct ctl_var clock_var[] = {
{ 0, PADDING, "" }, /* 0 */
{ CC_TYPE, UI, "type" }, /* 1 */
{ CC_TIMECODE, ST, "timecode" }, /* 2 */
{ CC_POLL, UI, "poll" }, /* 3 */
{ CC_NOREPLY, UI, "noreply" }, /* 4 */
{ CC_BADFORMAT, UI, "badformat" }, /* 5 */
{ CC_BADDATA, UI, "baddata" }, /* 6 */
{ CC_FUDGETIME1, FL, "fudgetime1" }, /* 7 */
{ CC_FUDGETIME2, FL, "fudgetime2" }, /* 8 */
{ CC_FUDGEVAL1, UI, "stratum" }, /* 9 */
{ CC_FUDGEVAL2, RF, "refid" }, /* 10 */
{ CC_FLAGS, UI, "flags" }, /* 11 */
{ CC_DEVICE, ST, "device" }, /* 12 */
{ 0, EOV, "" }
};
/*
* flasher bits
*/
static const char *tstflagnames[] = {
"dup_pkt", /* TEST1 */
"bogus_pkt", /* TEST2 */
"proto_unsync", /* TEST3 */
"no_access", /* TEST4 */
"bad_auth", /* TEST5 */
"peer_unsync", /* TEST6 */
"peer_stratum", /* TEST7 */
"root_bounds", /* TEST8 */
"peer_bounds", /* TEST9 */
"bad_autokey", /* TEST10 */
"not_proventic" /* TEST11*/
};
int ntpqmain P((int, char **));
/*
* Built in command handler declarations
*/
static int openhost P((const char *));
static int sendpkt P((char *, int));
static int getresponse P((int, int, u_short *, int *, char **, int));
static int sendrequest P((int, int, int, int, char *));
static char * tstflags P((u_long));
static void getcmds P((void));
static RETSIGTYPE abortcmd P((int));
static void docmd P((const char *));
static void tokenize P((const char *, char **, int *));
static int findcmd P((char *, struct xcmd *, struct xcmd *, struct xcmd **));
static int getarg P((char *, int, arg_v *));
static int rtdatetolfp P((char *, l_fp *));
static int decodearr P((char *, int *, l_fp *));
static void help P((struct parse *, FILE *));
#ifdef QSORT_USES_VOID_P
static int helpsort P((const void *, const void *));
#else
static int helpsort P((char **, char **));
#endif
static void printusage P((struct xcmd *, FILE *));
static void timeout P((struct parse *, FILE *));
static void auth_delay P((struct parse *, FILE *));
static void host P((struct parse *, FILE *));
static void ntp_poll P((struct parse *, FILE *));
static void keyid P((struct parse *, FILE *));
static void keytype P((struct parse *, FILE *));
static void passwd P((struct parse *, FILE *));
static void hostnames P((struct parse *, FILE *));
static void setdebug P((struct parse *, FILE *));
static void quit P((struct parse *, FILE *));
static void version P((struct parse *, FILE *));
static void raw P((struct parse *, FILE *));
static void cooked P((struct parse *, FILE *));
static void authenticate P((struct parse *, FILE *));
static void ntpversion P((struct parse *, FILE *));
static void warning P((const char *, const char *, const char *));
static void error P((const char *, const char *, const char *));
static u_long getkeyid P((const char *));
static void atoascii P((int, char *, char *));
static void makeascii P((int, char *, FILE *));
static void rawprint P((int, int, char *, int, FILE *));
static void startoutput P((void));
static void output P((FILE *, char *, char *));
static void endoutput P((FILE *));
static void outputarr P((FILE *, char *, int, l_fp *));
static void cookedprint P((int, int, char *, int, FILE *));
#ifdef QSORT_USES_VOID_P
static int assoccmp P((const void *, const void *));
#else
static int assoccmp P((struct association *, struct association *));
#endif /* sgi || bsdi */
/*
* Built-in commands we understand
*/
struct xcmd builtins[] = {
{ "?", help, { OPT|STR, NO, NO, NO },
{ "command", "", "", "" },
"tell the use and syntax of commands" },
{ "help", help, { OPT|STR, NO, NO, NO },
{ "command", "", "", "" },
"tell the use and syntax of commands" },
{ "timeout", timeout, { OPT|UINT, NO, NO, NO },
{ "msec", "", "", "" },
"set the primary receive time out" },
{ "delay", auth_delay, { OPT|INT, NO, NO, NO },
{ "msec", "", "", "" },
"set the delay added to encryption time stamps" },
{ "host", host, { OPT|STR, NO, NO, NO },
{ "hostname", "", "", "" },
"specify the host whose NTP server we talk to" },
{ "poll", ntp_poll, { OPT|UINT, OPT|STR, NO, NO },
{ "n", "verbose", "", "" },
"poll an NTP server in client mode `n' times" },
{ "passwd", passwd, { NO, NO, NO, NO },
{ "", "", "", "" },
"specify a password to use for authenticated requests"},
{ "hostnames", hostnames, { OPT|STR, NO, NO, NO },
{ "yes|no", "", "", "" },
"specify whether hostnames or net numbers are printed"},
{ "debug", setdebug, { OPT|STR, NO, NO, NO },
{ "no|more|less", "", "", "" },
"set/change debugging level" },
{ "quit", quit, { NO, NO, NO, NO },
{ "", "", "", "" },
"exit ntpq" },
{ "exit", quit, { NO, NO, NO, NO },
{ "", "", "", "" },
"exit ntpq" },
{ "keyid", keyid, { OPT|UINT, NO, NO, NO },
{ "key#", "", "", "" },
"set keyid to use for authenticated requests" },
{ "version", version, { NO, NO, NO, NO },
{ "", "", "", "" },
"print version number" },
{ "raw", raw, { NO, NO, NO, NO },
{ "", "", "", "" },
"do raw mode variable output" },
{ "cooked", cooked, { NO, NO, NO, NO },
{ "", "", "", "" },
"do cooked mode variable output" },
{ "authenticate", authenticate, { OPT|STR, NO, NO, NO },
{ "yes|no", "", "", "" },
"always authenticate requests to this server" },
{ "ntpversion", ntpversion, { OPT|UINT, NO, NO, NO },
{ "version number", "", "", "" },
"set the NTP version number to use for requests" },
{ "keytype", keytype, { OPT|STR, NO, NO, NO },
{ "key type (md5|des)", "", "", "" },
"set key type to use for authenticated requests (des|md5)" },
{ 0, 0, { NO, NO, NO, NO },
{ "", "", "", "" }, "" }
};
/*
* Default values we use.
*/
#define DEFTIMEOUT (5) /* 5 second time out */
#define DEFSTIMEOUT (2) /* 2 second time out after first */
#define DEFDELAY 0x51EB852 /* 20 milliseconds, l_fp fraction */
#define DEFHOST "127.0.0.1" /* default host name */
#define LENHOSTNAME 256 /* host name is 256 characters long */
#define MAXCMDS 100 /* maximum commands on cmd line */
#define MAXHOSTS 200 /* maximum hosts on cmd line */
#define MAXLINE 512 /* maximum line length */
#define MAXTOKENS (1+MAXARGS+2) /* maximum number of usable tokens */
#define MAXVARLEN 256 /* maximum length of a variable name */
#define MAXVALLEN 400 /* maximum length of a variable value */
#define MAXOUTLINE 72 /* maximum length of an output line */
/*
* Some variables used and manipulated locally
*/
struct timeval tvout = { DEFTIMEOUT, 0 }; /* time out for reads */
struct timeval tvsout = { DEFSTIMEOUT, 0 }; /* secondary time out */
l_fp delay_time; /* delay time */
char currenthost[LENHOSTNAME]; /* current host name */
struct sockaddr_in hostaddr = { 0 }; /* host address */
int showhostnames = 1; /* show host names by default */
int sockfd; /* fd socket is opened on */
int havehost = 0; /* set to 1 when host open */
struct servent *server_entry = NULL; /* server entry for ntp */
#ifdef SYS_WINNT
WORD wVersionRequested;
WSADATA wsaData;
DWORD NumberOfBytesWritten;
HANDLE TimerThreadHandle = NULL; /* 1998/06/03 - Used in ntplib/machines.c */
void timer(void) { ; }; /* 1998/06/03 - Used in ntplib/machines.c */
#endif /* SYS_WINNT */
/*
* Sequence number used for requests. It is incremented before
* it is used.
*/
u_short sequence;
/*
* Holds data returned from queries. Declare buffer long to be sure of
* alignment.
*/
#define MAXFRAGS 24 /* maximum number of fragments */
#define DATASIZE (MAXFRAGS*480) /* maximum amount of data */
long pktdata[DATASIZE/sizeof(long)];
/*
* Holds association data for use with the &n operator.
*/
struct association assoc_cache[MAXASSOC];
int numassoc = 0; /* number of cached associations */
/*
* For commands typed on the command line (with the -c option)
*/
int numcmds = 0;
const char *ccmds[MAXCMDS];
#define ADDCMD(cp) if (numcmds < MAXCMDS) ccmds[numcmds++] = (cp)
/*
* When multiple hosts are specified.
*/
int numhosts = 0;
const char *chosts[MAXHOSTS];
#define ADDHOST(cp) if (numhosts < MAXHOSTS) chosts[numhosts++] = (cp)
/*
* Error codes for internal use
*/
#define ERR_UNSPEC 256
#define ERR_INCOMPLETE 257
#define ERR_TIMEOUT 258
#define ERR_TOOMUCH 259
/*
* Macro definitions we use
*/
#define ISSPACE(c) ((c) == ' ' || (c) == '\t')
#define ISEOL(c) ((c) == '\n' || (c) == '\r' || (c) == '\0')
#define STREQ(a, b) (*(a) == *(b) && strcmp((a), (b)) == 0)
/*
* Jump buffer for longjumping back to the command level
*/
jmp_buf interrupt_buf;
/*
* Points at file being currently printed into
*/
FILE *current_output;
/*
* Command table imported from ntpdc_ops.c
*/
extern struct xcmd opcmds[];
char *progname;
volatile int debug;
#ifdef NO_MAIN_ALLOWED
CALL(ntpq,"ntpq",ntpqmain);
void clear_globals(void)
{
extern int ntp_optind;
extern char *ntp_optarg;
showhostnames = 0; /* don'tshow host names by default */
ntp_optind = 0;
ntp_optarg = 0;
server_entry = NULL; /* server entry for ntp */
havehost = 0; /* set to 1 when host open */
numassoc = 0; /* number of cached associations */
numcmds = 0;
numhosts = 0;
}
#endif
/*
* main - parse arguments and handle options
*/
#ifndef NO_MAIN_ALLOWED
int
main(
int argc,
char *argv[]
)
{
return ntpqmain(argc, argv);
}
#endif
int
ntpqmain(
int argc,
char *argv[]
)
{
int c;
int errflg = 0;
extern int ntp_optind;
extern char *ntp_optarg;
#ifdef NO_MAIN_ALLOWED
clear_globals();
taskPrioritySet(taskIdSelf(), 100 );
#endif
delay_time.l_ui = 0;
delay_time.l_uf = DEFDELAY;
progname = argv[0];
while ((c = ntp_getopt(argc, argv, "c:dinp")) != EOF)
switch (c) {
case 'c':
ADDCMD(ntp_optarg);
break;
case 'd':
++debug;
break;
case 'i':
interactive = 1;
break;
case 'n':
showhostnames = 0;
break;
case 'p':
ADDCMD("peers");
break;
default:
errflg++;
break;
}
if (errflg) {
(void) fprintf(stderr,
"usage: %s [-dinp] [-c cmd] host ...\n",
progname);
exit(2);
}
if (ntp_optind == argc) {
ADDHOST(DEFHOST);
} else {
for (; ntp_optind < argc; ntp_optind++)
ADDHOST(argv[ntp_optind]);
}
if (numcmds == 0 && interactive == 0
&& isatty(fileno(stdin)) && isatty(fileno(stderr))) {
interactive = 1;
}
#ifndef SYS_WINNT /* Under NT cannot handle SIGINT, WIN32 spawns a handler */
if (interactive)
(void) signal_no_reset(SIGINT, abortcmd);
#endif /* SYS_WINNT */
#ifdef SYS_WINNT
wVersionRequested = MAKEWORD(1,1);
if (WSAStartup(wVersionRequested, &wsaData)) {
fprintf(stderr, "No useable winsock.dll");
exit(1);
}
#endif /* SYS_WINNT */
if (numcmds == 0) {
(void) openhost(chosts[0]);
getcmds();
} else {
int ihost;
int icmd;
for (ihost = 0; ihost < numhosts; ihost++) {
if (openhost(chosts[ihost]))
for (icmd = 0; icmd < numcmds; icmd++)
docmd(ccmds[icmd]);
}
}
#ifdef SYS_WINNT
WSACleanup();
#endif /* SYS_WINNT */
return 0;
}
/*
* openhost - open a socket to a host
*/
static int
openhost(
const char *hname
)
{
u_int32 netnum;
char temphost[LENHOSTNAME];
if (server_entry == NULL) {
server_entry = getservbyname("ntp", "udp");
if (server_entry == NULL) {
#ifdef VMS /* UCX getservbyname() doesn't work [yet], but we do know better */
server_entry = (struct servent *)
malloc(sizeof(struct servent));
server_entry->s_port = htons(NTP_PORT);
#else
(void) fprintf(stderr, "%s: ntp/udp: unknown service\n",
progname);
exit(1);
#endif /* VMS & UCX */
}
if (debug > 2)
printf("Got ntp/udp service entry\n");
}
if (!getnetnum(hname, &netnum, temphost))
return 0;
if (debug > 2)
printf("Opening host %s\n", temphost);
if (havehost == 1) {
if (debug > 2)
printf("Closing old host %s\n", currenthost);
(void) closesocket(sockfd);
havehost = 0;
}
(void) strcpy(currenthost, temphost);
hostaddr.sin_family = AF_INET;
#ifndef SYS_VXWORKS
hostaddr.sin_port = server_entry->s_port;
#else
hostaddr.sin_port = htons(SERVER_PORT_NUM);
#endif
hostaddr.sin_addr.s_addr = netnum;
#ifdef SYS_WINNT
{
int optionValue = SO_SYNCHRONOUS_NONALERT;
int err;
err = setsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char *)&optionValue, sizeof(optionValue));
if (err != NO_ERROR) {
(void) fprintf(stderr, "cannot open nonoverlapped sockets\n");
exit(1);
}
}
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == INVALID_SOCKET) {
error("socket", "", "");
exit(-1);
}
#else
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == -1)
error("socket", "", "");
#endif /* SYS_WINNT */
#ifdef NEED_RCVBUF_SLOP
# ifdef SO_RCVBUF
{ int rbufsize = DATASIZE + 2048; /* 2K for slop */
if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF,
&rbufsize, sizeof(int)) == -1)
error("setsockopt", "", "");
}
# endif
#endif
if (connect(sockfd, (struct sockaddr *)&hostaddr,
sizeof(hostaddr)) == -1)
error("connect", "", "");
havehost = 1;
return 1;
}
/* XXX ELIMINATE sendpkt similar in ntpq.c, ntpdc.c, ntp_io.c, ntptrace.c */
/*
* sendpkt - send a packet to the remote host
*/
static int
sendpkt(
char *xdata,
int xdatalen
)
{
if (debug >= 3)
printf("Sending %d octets\n", xdatalen);
if (send(sockfd, xdata, (size_t)xdatalen, 0) == -1) {
warning("write to %s failed", currenthost, "");
return -1;
}
if (debug >= 4) {
int first = 8;
printf("Packet data:\n");
while (xdatalen-- > 0) {
if (first-- == 0) {
printf("\n");
first = 7;
}
printf(" %02x", *xdata++ & 0xff);
}
printf("\n");
}
return 0;
}
/*
* getresponse - get a (series of) response packet(s) and return the data
*/
static int
getresponse(
int opcode,
int associd,
u_short *rstatus,
int *rsize,
char **rdata,
int timeo
)
{
struct ntp_control rpkt;
struct timeval tvo;
u_short offsets[MAXFRAGS+1];
u_short counts[MAXFRAGS+1];
u_short offset;
u_short count;
int numfrags;
int seenlastfrag;
fd_set fds;
int n;
/*
* This is pretty tricky. We may get between 1 and MAXFRAG packets
* back in response to the request. We peel the data out of
* each packet and collect it in one long block. When the last
* packet in the sequence is received we'll know how much data we
* should have had. Note we use one long time out, should reconsider.
*/
*rsize = 0;
if (rstatus)
*rstatus = 0;
*rdata = (char *)pktdata;
numfrags = 0;
seenlastfrag = 0;
FD_ZERO(&fds);
again:
if (numfrags == 0)
tvo = tvout;
else
tvo = tvsout;
FD_SET(sockfd, &fds);
n = select(sockfd+1, &fds, (fd_set *)0, (fd_set *)0, &tvo);
#if 0
if (debug >= 1)
printf("select() returns %d\n", n);
#endif
if (n == -1) {
warning("select fails", "", "");
return -1;
}
if (n == 0) {
/*
* Timed out. Return what we have
*/
if (numfrags == 0) {
if (timeo)
(void) fprintf(stderr,
"%s: timed out, nothing received\n",
currenthost);
return ERR_TIMEOUT;
} else {
if (timeo)
(void) fprintf(stderr,
"%s: timed out with incomplete data\n",
currenthost);
if (debug) {
printf("Received fragments:\n");
for (n = 0; n < numfrags; n++)
printf("%4d %d\n", offsets[n],
counts[n]);
if (seenlastfrag)
printf("last fragment received\n");
else
printf("last fragment not received\n");
}
return ERR_INCOMPLETE;
}
}
n = recv(sockfd, (char *)&rpkt, sizeof(rpkt), 0);
if (n == -1) {
warning("read", "", "");
return -1;
}
if (debug >= 4) {
int len = n, first = 8;
char *data = (char *)&rpkt;
printf("Packet data:\n");
while (len-- > 0) {
if (first-- == 0) {
printf("\n");
first = 7;
}
printf(" %02x", *data++ & 0xff);
}
printf("\n");
}
/*
* Check for format errors. Bug proofing.
*/
if (n < CTL_HEADER_LEN) {
if (debug)
printf("Short (%d byte) packet received\n", n);
goto again;
}
if (PKT_VERSION(rpkt.li_vn_mode) > NTP_VERSION
|| PKT_VERSION(rpkt.li_vn_mode) < NTP_OLDVERSION) {
if (debug)
printf("Packet received with version %d\n",
PKT_VERSION(rpkt.li_vn_mode));
goto again;
}
if (PKT_MODE(rpkt.li_vn_mode) != MODE_CONTROL) {
if (debug)
printf("Packet received with mode %d\n",
PKT_MODE(rpkt.li_vn_mode));
goto again;
}
if (!CTL_ISRESPONSE(rpkt.r_m_e_op)) {
if (debug)
printf("Received request packet, wanted response\n");
goto again;
}
/*
* Check opcode and sequence number for a match.
* Could be old data getting to us.
*/
if (ntohs(rpkt.sequence) != sequence) {
if (debug)
printf(
"Received sequnce number %d, wanted %d\n",
ntohs(rpkt.sequence), sequence);
goto again;
}
if (CTL_OP(rpkt.r_m_e_op) != opcode) {
if (debug)
printf(
"Received opcode %d, wanted %d (sequence number okay)\n",
CTL_OP(rpkt.r_m_e_op), opcode);
goto again;
}
/*
* Check the error code. If non-zero, return it.
*/
if (CTL_ISERROR(rpkt.r_m_e_op)) {
int errcode;
errcode = (ntohs(rpkt.status) >> 8) & 0xff;
if (debug && CTL_ISMORE(rpkt.r_m_e_op)) {
printf("Error code %d received on not-final packet\n",
errcode);
}
if (errcode == CERR_UNSPEC)
return ERR_UNSPEC;
return errcode;
}
/*
* Check the association ID to make sure it matches what
* we sent.
*/
if (ntohs(rpkt.associd) != associd) {
if (debug)
printf("Association ID %d doesn't match expected %d\n",
ntohs(rpkt.associd), associd);
/*
* Hack for silly fuzzballs which, at the time of writing,
* return an assID of sys.peer when queried for system variables.
*/
#ifdef notdef
goto again;
#endif
}
/*
* Collect offset and count. Make sure they make sense.
*/
offset = ntohs(rpkt.offset);
count = ntohs(rpkt.count);
if (debug >= 3) {
int shouldbesize;
u_long key;
u_long *lpkt;
int maclen;
/*
* Usually we ignore authentication, but for debugging purposes
* we watch it here.
*/
shouldbesize = CTL_HEADER_LEN + count;
/* round to 8 octet boundary */
shouldbesize = (shouldbesize + 7) & ~7;
if (n & 0x3) {
printf("Packet not padded, size = %d\n", n);
} if ((maclen = n - shouldbesize) >= MIN_MAC_LEN) {
printf(
"Packet shows signs of authentication (total %d, data %d, mac %d)\n",
n, shouldbesize, maclen);
lpkt = (u_long *)&rpkt;
printf("%08lx %08lx %08lx %08lx %08lx %08lx\n",
(u_long)ntohl(lpkt[(n - maclen)/sizeof(u_long) - 3]),
(u_long)ntohl(lpkt[(n - maclen)/sizeof(u_long) - 2]),
(u_long)ntohl(lpkt[(n - maclen)/sizeof(u_long) - 1]),
(u_long)ntohl(lpkt[(n - maclen)/sizeof(u_long)]),
(u_long)ntohl(lpkt[(n - maclen)/sizeof(u_long) + 1]),
(u_long)ntohl(lpkt[(n - maclen)/sizeof(u_long) + 2]));
key = ntohl(lpkt[(n - maclen) / sizeof(u_long)]);
printf("Authenticated with keyid %lu\n", (u_long)key);
if (key != 0 && key != info_auth_keyid) {
printf("We don't know that key\n");
} else {
if (authdecrypt(key, (u_int32 *)&rpkt,
n - maclen, maclen)) {
printf("Auth okay!\n");
} else {
printf("Auth failed!\n");
}
}
}
}
if (debug >= 2)
printf("Got packet, size = %d\n", n);
if (count > (u_short)(n-CTL_HEADER_LEN)) {
if (debug)
printf(
"Received count of %d octets, data in packet is %d\n",
count, n-CTL_HEADER_LEN);
goto again;
}
if (count == 0 && CTL_ISMORE(rpkt.r_m_e_op)) {
if (debug)
printf("Received count of 0 in non-final fragment\n");
goto again;
}
if (offset + count > sizeof(pktdata)) {
if (debug)
printf("Offset %d, count %d, too big for buffer\n",
offset, count);
return ERR_TOOMUCH;
}
if (seenlastfrag && !CTL_ISMORE(rpkt.r_m_e_op)) {
if (debug)
printf("Received second last fragment packet\n");
goto again;
}
/*
* So far, so good. Record this fragment, making sure it doesn't
* overlap anything.
*/
if (debug >= 2)
printf("Packet okay\n");;
if (numfrags == MAXFRAGS) {
if (debug)
printf("Number of fragments exceeds maximum\n");
return ERR_TOOMUCH;
}
for (n = 0; n < numfrags; n++) {
if (offset == offsets[n])
goto again; /* duplicate */
if (offset < offsets[n])
break;
}
if ((u_short)(n > 0 && offsets[n-1] + counts[n-1]) > offset)
goto overlap;
if (n < numfrags && (u_short)(offset + count) > offsets[n])
goto overlap;
{
register int i;
for (i = numfrags; i > n; i--) {
offsets[i] = offsets[i-1];
counts[i] = counts[i-1];
}
}
offsets[n] = offset;
counts[n] = count;
numfrags++;
/*
* Got that stuffed in right. Figure out if this was the last.
* Record status info out of the last packet.
*/
if (!CTL_ISMORE(rpkt.r_m_e_op)) {
seenlastfrag = 1;
if (rstatus != 0)
*rstatus = ntohs(rpkt.status);
}
/*
* Copy the data into the data buffer.
*/
memmove((char *)pktdata + offset, (char *)rpkt.data, count);
/*
* If we've seen the last fragment, look for holes in the sequence.
* If there aren't any, we're done.
*/
if (seenlastfrag && offsets[0] == 0) {
for (n = 1; n < numfrags; n++) {
if (offsets[n-1] + counts[n-1] != offsets[n])
break;
}
if (n == numfrags) {
*rsize = offsets[numfrags-1] + counts[numfrags-1];
return 0;
}
}
goto again;
overlap:
/*
* Print debugging message about overlapping fragments
*/
if (debug)
printf("Overlapping fragments returned in response\n");
goto again;
}
/*
* sendrequest - format and send a request packet
*/
static int
sendrequest(
int opcode,
int associd,
int auth,
int qsize,
char *qdata
)
{
struct ntp_control qpkt;
int pktsize;
/*
* Check to make sure the data will fit in one packet
*/
if (qsize > CTL_MAX_DATA_LEN) {
(void) fprintf(stderr,
"***Internal error! qsize (%d) too large\n",
qsize);
return 1;
}
/*
* Fill in the packet
*/
qpkt.li_vn_mode = PKT_LI_VN_MODE(0, pktversion, MODE_CONTROL);
qpkt.r_m_e_op = (u_char)opcode & CTL_OP_MASK;
qpkt.sequence = htons(sequence);
qpkt.status = 0;
qpkt.associd = htons((u_short)associd);
qpkt.offset = 0;
qpkt.count = htons((u_short)qsize);
/*
* If we have data, copy it in and pad it out to a 64
* bit boundary.
*/
if (qsize > 0) {
memmove((char *)qpkt.data, qdata, (unsigned)qsize);
pktsize = qsize + CTL_HEADER_LEN;
while (pktsize & (sizeof(u_long) - 1)) {
qpkt.data[qsize++] = 0;
pktsize++;
}
} else {
pktsize = CTL_HEADER_LEN;
}
/*
* If it isn't authenticated we can just send it. Otherwise
* we're going to have to think about it a little.
*/
if (!auth && !always_auth) {
return sendpkt((char *)&qpkt, pktsize);
} else {
const char *pass = "\0";
int maclen = 0;
u_long my_keyid;
/*
* Pad out packet to a multiple of 8 octets to be sure
* receiver can handle it.
*/
while (pktsize & 7) {
qpkt.data[qsize++] = 0;
pktsize++;
}
/*
* Get the keyid and the password if we don't have one.
*/
if (info_auth_keyid == 0) {
maclen = getkeyid("Keyid: ");
if (maclen == 0) {
(void) fprintf(stderr,
"Invalid key identifier\n");
return 1;
}
}
if (!authistrusted(info_auth_keyid)) {
pass = getpass((info_auth_keytype == KEY_TYPE_DES)
? "DES Password: " : "MD5 Password: ");
if (*pass == '\0') {
(void) fprintf(stderr,
"Invalid password\n");
return (1);
}
}
info_auth_keyid = maclen;
authusekey(info_auth_keyid, info_auth_keytype, (const u_char *)pass);
authtrust(info_auth_keyid, 1);
/*
* Stick the keyid in the packet where
* cp currently points. Cp should be aligned
* properly. Then do the encryptions.
*/
my_keyid = htonl(info_auth_keyid);
memcpy(&qpkt.data[qsize], &my_keyid, sizeof my_keyid);
maclen = authencrypt(info_auth_keyid, (u_int32 *)&qpkt,
pktsize);
if (maclen == 0) {
(void) fprintf(stderr, "Key not found\n");
return (1);
}
return sendpkt((char *)&qpkt, pktsize + maclen);
}
/*NOTREACHED*/
}
/*
* doquery - send a request and process the response
*/
int
doquery(
int opcode,
int associd,
int auth,
int qsize,
char *qdata,
u_short *rstatus,
int *rsize,
char **rdata
)
{
int res;
int done;
/*
* Check to make sure host is open
*/
if (!havehost) {
(void) fprintf(stderr, "***No host open, use `host' command\n");
return -1;
}
done = 0;
sequence++;
again:
/*
* send a request
*/
res = sendrequest(opcode, associd, auth, qsize, qdata);
if (res != 0)
return res;
/*
* Get the response. If we got a standard error, print a message
*/
res = getresponse(opcode, associd, rstatus, rsize, rdata, done);
if (res > 0) {
if (!done && (res == ERR_TIMEOUT || res == ERR_INCOMPLETE)) {
if (res == ERR_INCOMPLETE) {
/*
* better bump the sequence so we don't
* get confused about differing fragments.
*/
sequence++;
}
done = 1;
goto again;
}
switch(res) {
case CERR_BADFMT:
(void) fprintf(stderr,
"***Server reports a bad format request packet\n");
break;
case CERR_PERMISSION:
(void) fprintf(stderr,
"***Server disallowed request (authentication?)\n");
break;
case CERR_BADOP:
(void) fprintf(stderr,
"***Server reports a bad opcode in request\n");
break;
case CERR_BADASSOC:
(void) fprintf(stderr,
"***Association ID %d unknown to server\n",associd);
break;
case CERR_UNKNOWNVAR:
(void) fprintf(stderr,
"***A request variable unknown to the server\n");
break;
case CERR_BADVALUE:
(void) fprintf(stderr,
"***Server indicates a request variable was bad\n");
break;
case ERR_UNSPEC:
(void) fprintf(stderr,
"***Server returned an unspecified error\n");
break;
case ERR_TIMEOUT:
(void) fprintf(stderr, "***Request timed out\n");
break;
case ERR_INCOMPLETE:
(void) fprintf(stderr,
"***Response from server was incomplete\n");
break;
case ERR_TOOMUCH:
(void) fprintf(stderr,
"***Buffer size exceeded for returned data\n");
break;
default:
(void) fprintf(stderr,
"***Server returns unknown error code %d\n", res);
break;
}
}
return res;
}
/*
* getcmds - read commands from the standard input and execute them
*/
static void
getcmds(void)
{
#ifdef HAVE_LIBREADLINE
char *line;
for (;;) {
if ((line = readline(interactive?prompt:"")) == NULL) return;
if (*line) add_history(line);
docmd(line);
free(line);
}
#else /* not HAVE_LIBREADLINE */
char line[MAXLINE];
for (;;) {
if (interactive) {
#ifdef VMS /* work around a problem with mixing stdout & stderr */
fputs("",stdout);
#endif
(void) fputs(prompt, stderr);
(void) fflush(stderr);
}
if (fgets(line, sizeof line, stdin) == NULL)
return;
docmd(line);
}
#endif /* not HAVE_LIBREADLINE */
}
/*
* abortcmd - catch interrupts and abort the current command
*/
static RETSIGTYPE
abortcmd(
int sig
)
{
if (current_output == stdout)
(void) fflush(stdout);
putc('\n', stderr);
(void) fflush(stderr);
if (jump) longjmp(interrupt_buf, 1);
}
/*
* docmd - decode the command line and execute a command
*/
static void
docmd(
const char *cmdline
)
{
char *tokens[1+MAXARGS+2];
struct parse pcmd;
int ntok;
static int i;
struct xcmd *xcmd;
/*
* Tokenize the command line. If nothing on it, return.
*/
tokenize(cmdline, tokens, &ntok);
if (ntok == 0)
return;
/*
* Find the appropriate command description.
*/
i = findcmd(tokens[0], builtins, opcmds, &xcmd);
if (i == 0) {
(void) fprintf(stderr, "***Command `%s' unknown\n",
tokens[0]);
return;
} else if (i >= 2) {
(void) fprintf(stderr, "***Command `%s' ambiguous\n",
tokens[0]);
return;
}
/*
* Save the keyword, then walk through the arguments, interpreting
* as we go.
*/
pcmd.keyword = tokens[0];
pcmd.nargs = 0;
for (i = 0; i < MAXARGS && xcmd->arg[i] != NO; i++) {
if ((i+1) >= ntok) {
if (!(xcmd->arg[i] & OPT)) {
printusage(xcmd, stderr);
return;
}
break;
}
if ((xcmd->arg[i] & OPT) && (*tokens[i+1] == '>'))
break;
if (!getarg(tokens[i+1], (int)xcmd->arg[i], &pcmd.argval[i]))
return;
pcmd.nargs++;
}
i++;
if (i < ntok && *tokens[i] == '>') {
char *fname;
if (*(tokens[i]+1) != '\0')
fname = tokens[i]+1;
else if ((i+1) < ntok)
fname = tokens[i+1];
else {
(void) fprintf(stderr, "***No file for redirect\n");
return;
}
current_output = fopen(fname, "w");
if (current_output == NULL) {
(void) fprintf(stderr, "***Error opening %s: ", fname);
perror("");
return;
}
i = 1; /* flag we need a close */
} else {
current_output = stdout;
i = 0; /* flag no close */
}
if (interactive && setjmp(interrupt_buf)) {
jump = 0;
return;
} else {
jump++;
(xcmd->handler)(&pcmd, current_output);
jump = 0; /* HMS: 961106: was after fclose() */
if (i) (void) fclose(current_output);
}
}
/*
* tokenize - turn a command line into tokens
*/
static void
tokenize(
const char *line,
char **tokens,
int *ntok
)
{
register const char *cp;
register char *sp;
static char tspace[MAXLINE];
sp = tspace;
cp = line;
for (*ntok = 0; *ntok < MAXTOKENS; (*ntok)++) {
tokens[*ntok] = sp;
while (ISSPACE(*cp))
cp++;
if (ISEOL(*cp))
break;
do {
*sp++ = *cp++;
} while (!ISSPACE(*cp) && !ISEOL(*cp));
*sp++ = '\0';
}
}
/*
* findcmd - find a command in a command description table
*/
static int
findcmd(
register char *str,
struct xcmd *clist1,
struct xcmd *clist2,
struct xcmd **cmd
)
{
register struct xcmd *cl;
register int clen;
int nmatch;
struct xcmd *nearmatch = NULL;
struct xcmd *clist;
clen = strlen(str);
nmatch = 0;
if (clist1 != 0)
clist = clist1;
else if (clist2 != 0)
clist = clist2;
else
return 0;
again:
for (cl = clist; cl->keyword != 0; cl++) {
/* do a first character check, for efficiency */
if (*str != *(cl->keyword))
continue;
if (strncmp(str, cl->keyword, (unsigned)clen) == 0) {
/*
* Could be extact match, could be approximate.
* Is exact if the length of the keyword is the
* same as the str.
*/
if (*((cl->keyword) + clen) == '\0') {
*cmd = cl;
return 1;
}
nmatch++;
nearmatch = cl;
}
}
/*
* See if there is more to do. If so, go again. Sorry about the
* goto, too much looking at BSD sources...
*/
if (clist == clist1 && clist2 != 0) {
clist = clist2;
goto again;
}
/*
* If we got extactly 1 near match, use it, else return number
* of matches.
*/
if (nmatch == 1) {
*cmd = nearmatch;
return 1;
}
return nmatch;
}
/*
* getarg - interpret an argument token
*/
static int
getarg(
char *str,
int code,
arg_v *argp
)
{
int isneg;
char *cp, *np;
static const char *digits = "0123456789";
switch (code & ~OPT) {
case STR:
argp->string = str;
break;
case ADD:
if (!getnetnum(str, &(argp->netnum), (char *)0)) {
return 0;
}
break;
case INT:
case UINT:
isneg = 0;
np = str;
if (*np == '&') {
np++;
isneg = atoi(np);
if (isneg <= 0) {
(void) fprintf(stderr,
"***Association value `%s' invalid/undecodable\n", str);
return 0;
}
if (isneg > numassoc) {
(void) fprintf(stderr,
"***Association for `%s' unknown (max &%d)\n",
str, numassoc);
return 0;
}
argp->uval = assoc_cache[isneg-1].assid;
break;
}
if (*np == '-') {
np++;
isneg = 1;
}
argp->uval = 0;
do {
cp = strchr(digits, *np);
if (cp == NULL) {
(void) fprintf(stderr,
"***Illegal integer value %s\n", str);
return 0;
}
argp->uval *= 10;
argp->uval += (cp - digits);
} while (*(++np) != '\0');
if (isneg) {
if ((code & ~OPT) == UINT) {
(void) fprintf(stderr,
"***Value %s should be unsigned\n", str);
return 0;
}
argp->ival = -argp->ival;
}
break;
}
return 1;
}
/*
* getnetnum - given a host name, return its net number
* and (optional) full name
*/
int
getnetnum(
const char *hname,
u_int32 *num,
char *fullhost
)
{
struct hostent *hp;
if (decodenetnum(hname, num)) {
if (fullhost != 0) {
(void) sprintf(fullhost, "%lu.%lu.%lu.%lu",
(u_long)((htonl(*num) >> 24) & 0xff),
(u_long)((htonl(*num) >> 16) & 0xff),
(u_long)((htonl(*num) >> 8) & 0xff),
(u_long)(htonl(*num) & 0xff));
}
return 1;
} else if ((hp = gethostbyname(hname)) != 0) {
memmove((char *)num, hp->h_addr, sizeof(u_int32));
if (fullhost != 0)
(void) strcpy(fullhost, hp->h_name);
return 1;
} else {
(void) fprintf(stderr, "***Can't find host %s\n", hname);
return 0;
}
/*NOTREACHED*/
}
/*
* nntohost - convert network number to host name. This routine enforces
* the showhostnames setting.
*/
char *
nntohost(
u_int32 netnum
)
{
if (!showhostnames)
return numtoa(netnum);
if ((ntohl(netnum) & REFCLOCK_MASK) == REFCLOCK_ADDR)
return refnumtoa(netnum);
return numtohost(netnum);
}
/*
* rtdatetolfp - decode an RT-11 date into an l_fp
*/
static int
rtdatetolfp(
char *str,
l_fp *lfp
)
{
register char *cp;
register int i;
struct calendar cal;
char buf[4];
static const char *months[12] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
cal.yearday = 0;
/*
* An RT-11 date looks like:
*
* d[d]-Mth-y[y] hh:mm:ss
*
* (No docs, but assume 4-digit years are also legal...)
*
* d[d]-Mth-y[y[y[y]]] hh:mm:ss
*/
cp = str;
if (!isdigit((int)*cp)) {
if (*cp == '-') {
/*
* Catch special case
*/
L_CLR(lfp);
return 1;
}
return 0;
}
cal.monthday = *cp++ - '0'; /* ascii dependent */
if (isdigit((int)*cp)) {
cal.monthday = (cal.monthday << 3) + (cal.monthday << 1);
cal.monthday += *cp++ - '0';
}
if (*cp++ != '-')
return 0;
for (i = 0; i < 3; i++)
buf[i] = *cp++;
buf[3] = '\0';
for (i = 0; i < 12; i++)
if (STREQ(buf, months[i]))
break;
if (i == 12)
return 0;
cal.month = i + 1;
if (*cp++ != '-')
return 0;
if (!isdigit((int)*cp))
return 0;
cal.year = *cp++ - '0';
if (isdigit((int)*cp)) {
cal.year = (cal.year << 3) + (cal.year << 1);
cal.year += *cp++ - '0';
}
if (isdigit((int)*cp)) {
cal.year = (cal.year << 3) + (cal.year << 1);
cal.year += *cp++ - '0';
}
if (isdigit((int)*cp)) {
cal.year = (cal.year << 3) + (cal.year << 1);
cal.year += *cp++ - '0';
}
/*
* Catch special case. If cal.year == 0 this is a zero timestamp.
*/
if (cal.year == 0) {
L_CLR(lfp);
return 1;
}
if (*cp++ != ' ' || !isdigit((int)*cp))
return 0;
cal.hour = *cp++ - '0';
if (isdigit((int)*cp)) {
cal.hour = (cal.hour << 3) + (cal.hour << 1);
cal.hour += *cp++ - '0';
}
if (*cp++ != ':' || !isdigit((int)*cp))
return 0;
cal.minute = *cp++ - '0';
if (isdigit((int)*cp)) {
cal.minute = (cal.minute << 3) + (cal.minute << 1);
cal.minute += *cp++ - '0';
}
if (*cp++ != ':' || !isdigit((int)*cp))
return 0;
cal.second = *cp++ - '0';
if (isdigit((int)*cp)) {
cal.second = (cal.second << 3) + (cal.second << 1);
cal.second += *cp++ - '0';
}
/*
* For RT-11, 1972 seems to be the pivot year
*/
if (cal.year < 72)
cal.year += 2000;
if (cal.year < 100)
cal.year += 1900;
lfp->l_ui = caltontp(&cal);
lfp->l_uf = 0;
return 1;
}
/*
* decodets - decode a timestamp into an l_fp format number, with
* consideration of fuzzball formats.
*/
int
decodets(
char *str,
l_fp *lfp
)
{
/*
* If it starts with a 0x, decode as hex.
*/
if (*str == '0' && (*(str+1) == 'x' || *(str+1) == 'X'))
return hextolfp(str+2, lfp);
/*
* If it starts with a '"', try it as an RT-11 date.
*/
if (*str == '"') {
register char *cp = str+1;
register char *bp;
char buf[30];
bp = buf;
while (*cp != '"' && *cp != '\0' && bp < &buf[29])
*bp++ = *cp++;
*bp = '\0';
return rtdatetolfp(buf, lfp);
}
/*
* Might still be hex. Check out the first character. Talk
* about heuristics!
*/
if ((*str >= 'A' && *str <= 'F') || (*str >= 'a' && *str <= 'f'))
return hextolfp(str, lfp);
/*
* Try it as a decimal. If this fails, try as an unquoted
* RT-11 date. This code should go away eventually.
*/
if (atolfp(str, lfp))
return 1;
return rtdatetolfp(str, lfp);
}
/*
* decodetime - decode a time value. It should be in milliseconds
*/
int
decodetime(
char *str,
l_fp *lfp
)
{
return mstolfp(str, lfp);
}
/*
* decodeint - decode an integer
*/
int
decodeint(
char *str,
long *val
)
{
if (*str == '0') {
if (*(str+1) == 'x' || *(str+1) == 'X')
return hextoint(str+2, (u_long *)&val);
return octtoint(str, (u_long *)&val);
}
return atoint(str, val);
}
/*
* decodeuint - decode an unsigned integer
*/
int
decodeuint(
char *str,
u_long *val
)
{
if (*str == '0') {
if (*(str + 1) == 'x' || *(str + 1) == 'X')
return (hextoint(str + 2, val));
return (octtoint(str, val));
}
return (atouint(str, val));
}
/*
* decodearr - decode an array of time values
*/
static int
decodearr(
char *str,
int *narr,
l_fp *lfparr
)
{
register char *cp, *bp;
register l_fp *lfp;
char buf[60];
lfp = lfparr;
cp = str;
*narr = 0;
while (*narr < 8) {
while (isspace((int)*cp))
cp++;
if (*cp == '\0')
break;
bp = buf;
while (!isspace((int)*cp) && *cp != '\0')
*bp++ = *cp++;
*bp++ = '\0';
if (!decodetime(buf, lfp))
return 0;
(*narr)++;
lfp++;
}
return 1;
}
/*
* Finally, the built in command handlers
*/
/*
* help - tell about commands, or details of a particular command
*/
static void
help(
struct parse *pcmd,
FILE *fp
)
{
int i;
int n;
struct xcmd *xcp;
char *cmd;
const char *cmdsort[100];
int length[100];
int maxlength;
int numperline;
static const char *spaces = " "; /* 20 spaces */
if (pcmd->nargs == 0) {
n = 0;
for (xcp = builtins; xcp->keyword != 0; xcp++) {
if (*(xcp->keyword) != '?')
cmdsort[n++] = xcp->keyword;
}
for (xcp = opcmds; xcp->keyword != 0; xcp++)
cmdsort[n++] = xcp->keyword;
#ifdef QSORT_USES_VOID_P
qsort(cmdsort, (size_t)n, sizeof(char *), helpsort);
#else
qsort((char *)cmdsort, (size_t)n, sizeof(char *), helpsort);
#endif
maxlength = 0;
for (i = 0; i < n; i++) {
length[i] = strlen(cmdsort[i]);
if (length[i] > maxlength)
maxlength = length[i];
}
maxlength++;
numperline = 76 / maxlength;
(void) fprintf(fp, "Commands available:\n");
for (i = 0; i < n; i++) {
if ((i % numperline) == (numperline-1)
|| i == (n-1))
(void) fprintf(fp, "%s\n", cmdsort[i]);
else
(void) fprintf(fp, "%s%s", cmdsort[i],
spaces+20-maxlength+length[i]);
}
} else {
cmd = pcmd->argval[0].string;
n = findcmd(cmd, builtins, opcmds, &xcp);
if (n == 0) {
(void) fprintf(stderr,
"Command `%s' is unknown\n", cmd);
return;
} else if (n >= 2) {
(void) fprintf(stderr,
"Command `%s' is ambiguous\n", cmd);
return;
}
(void) fprintf(fp, "function: %s\n", xcp->comment);
printusage(xcp, fp);
}
}
/*
* helpsort - do hostname qsort comparisons
*/
#ifdef QSORT_USES_VOID_P
static int
helpsort(
const void *t1,
const void *t2
)
{
const char **name1 = (const char **)t1;
const char **name2 = (const char **)t2;
return strcmp(*name1, *name2);
}
#else
static int
helpsort(
char **name1,
char **name2
)
{
return strcmp(*name1, *name2);
}
#endif
/*
* printusage - print usage information for a command
*/
static void
printusage(
struct xcmd *xcp,
FILE *fp
)
{
register int i;
(void) fprintf(fp, "usage: %s", xcp->keyword);
for (i = 0; i < MAXARGS && xcp->arg[i] != NO; i++) {
if (xcp->arg[i] & OPT)
(void) fprintf(fp, " [ %s ]", xcp->desc[i]);
else
(void) fprintf(fp, " %s", xcp->desc[i]);
}
(void) fprintf(fp, "\n");
}
/*
* timeout - set time out time
*/
static void
timeout(
struct parse *pcmd,
FILE *fp
)
{
int val;
if (pcmd->nargs == 0) {
val = tvout.tv_sec * 1000 + tvout.tv_usec / 1000;
(void) fprintf(fp, "primary timeout %d ms\n", val);
} else {
tvout.tv_sec = pcmd->argval[0].uval / 1000;
tvout.tv_usec = (pcmd->argval[0].uval - (tvout.tv_sec * 1000))
* 1000;
}
}
/*
* auth_delay - set delay for auth requests
*/
static void
auth_delay(
struct parse *pcmd,
FILE *fp
)
{
int isneg;
u_long val;
if (pcmd->nargs == 0) {
val = delay_time.l_ui * 1000 + delay_time.l_uf / 4294967;
(void) fprintf(fp, "delay %lu ms\n", val);
} else {
if (pcmd->argval[0].ival < 0) {
isneg = 1;
val = (u_long)(-pcmd->argval[0].ival);
} else {
isneg = 0;
val = (u_long)pcmd->argval[0].ival;
}
delay_time.l_ui = val / 1000;
val %= 1000;
delay_time.l_uf = val * 4294967; /* 2**32/1000 */
if (isneg)
L_NEG(&delay_time);
}
}
/*
* host - set the host we are dealing with.
*/
static void
host(
struct parse *pcmd,
FILE *fp
)
{
if (pcmd->nargs == 0) {
if (havehost)
(void) fprintf(fp, "current host is %s\n", currenthost);
else
(void) fprintf(fp, "no current host\n");
} else if (openhost(pcmd->argval[0].string)) {
(void) fprintf(fp, "current host set to %s\n", currenthost);
numassoc = 0;
} else {
if (havehost)
(void) fprintf(fp,
"current host remains %s\n", currenthost);
else
(void) fprintf(fp, "still no current host\n");
}
}
/*
* poll - do one (or more) polls of the host via NTP
*/
/*ARGSUSED*/
static void
ntp_poll(
struct parse *pcmd,
FILE *fp
)
{
(void) fprintf(fp, "poll not implemented yet\n");
}
/*
* keyid - get a keyid to use for authenticating requests
*/
static void
keyid(
struct parse *pcmd,
FILE *fp
)
{
if (pcmd->nargs == 0) {
if (info_auth_keyid > NTP_MAXKEY)
(void) fprintf(fp, "no keyid defined\n");
else
(void) fprintf(fp, "keyid is %lu\n", (u_long)info_auth_keyid);
} else {
info_auth_keyid = pcmd->argval[0].uval;
}
}
/*
* keytype - get type of key to use for authenticating requests
*/
static void
keytype(
struct parse *pcmd,
FILE *fp
)
{
if (pcmd->nargs == 0)
fprintf(fp, "keytype is %s\n",
(info_auth_keytype == KEY_TYPE_MD5) ? "MD5" : "DES");
else
switch (*(pcmd->argval[0].string)) {
case 'm':
case 'M':
info_auth_keytype = KEY_TYPE_MD5;
break;
case 'd':
case 'D':
info_auth_keytype = KEY_TYPE_DES;
break;
default:
fprintf(fp, "keytype must be 'md5' or 'des'\n");
}
}
/*
* passwd - get an authentication key
*/
/*ARGSUSED*/
static void
passwd(
struct parse *pcmd,
FILE *fp
)
{
char *pass;
if (info_auth_keyid > NTP_MAXKEY) {
info_auth_keyid = getkeyid("Keyid: ");
if (info_auth_keyid > NTP_MAXKEY) {
(void)fprintf(fp, "Keyid must be defined\n");
return;
}
}
pass = getpass((info_auth_keytype == KEY_TYPE_DES)
? "DES Password: "
: "MD5 Password: "
);
if (*pass == '\0')
(void) fprintf(fp, "Password unchanged\n");
else
authusekey(info_auth_keyid, info_auth_keytype, (u_char *)pass);
}
/*
* hostnames - set the showhostnames flag
*/
static void
hostnames(
struct parse *pcmd,
FILE *fp
)
{
if (pcmd->nargs == 0) {
if (showhostnames)
(void) fprintf(fp, "hostnames being shown\n");
else
(void) fprintf(fp, "hostnames not being shown\n");
} else {
if (STREQ(pcmd->argval[0].string, "yes"))
showhostnames = 1;
else if (STREQ(pcmd->argval[0].string, "no"))
showhostnames = 0;
else
(void)fprintf(stderr, "What?\n");
}
}
/*
* setdebug - set/change debugging level
*/
static void
setdebug(
struct parse *pcmd,
FILE *fp
)
{
if (pcmd->nargs == 0) {
(void) fprintf(fp, "debug level is %d\n", debug);
return;
} else if (STREQ(pcmd->argval[0].string, "no")) {
debug = 0;
} else if (STREQ(pcmd->argval[0].string, "more")) {
debug++;
} else if (STREQ(pcmd->argval[0].string, "less")) {
debug--;
} else {
(void) fprintf(fp, "What?\n");
return;
}
(void) fprintf(fp, "debug level set to %d\n", debug);
}
/*
* quit - stop this nonsense
*/
/*ARGSUSED*/
static void
quit(
struct parse *pcmd,
FILE *fp
)
{
if (havehost)
closesocket(sockfd); /* cleanliness next to godliness */
exit(0);
}
/*
* version - print the current version number
*/
/*ARGSUSED*/
static void
version(
struct parse *pcmd,
FILE *fp
)
{
(void) fprintf(fp, "%s\n", Version);
return;
}
/*
* raw - set raw mode output
*/
/*ARGSUSED*/
static void
raw(
struct parse *pcmd,
FILE *fp
)
{
rawmode = 1;
(void) fprintf(fp, "Output set to raw\n");
}
/*
* cooked - set cooked mode output
*/
/*ARGSUSED*/
static void
cooked(
struct parse *pcmd,
FILE *fp
)
{
rawmode = 0;
(void) fprintf(fp, "Output set to cooked\n");
return;
}
/*
* authenticate - always authenticate requests to this host
*/
static void
authenticate(
struct parse *pcmd,
FILE *fp
)
{
if (pcmd->nargs == 0) {
if (always_auth) {
(void) fprintf(fp,
"authenticated requests being sent\n");
} else
(void) fprintf(fp,
"unauthenticated requests being sent\n");
} else {
if (STREQ(pcmd->argval[0].string, "yes")) {
always_auth = 1;
} else if (STREQ(pcmd->argval[0].string, "no")) {
always_auth = 0;
} else
(void)fprintf(stderr, "What?\n");
}
}
/*
* ntpversion - choose the NTP version to use
*/
static void
ntpversion(
struct parse *pcmd,
FILE *fp
)
{
if (pcmd->nargs == 0) {
(void) fprintf(fp,
"NTP version being claimed is %d\n", pktversion);
} else {
if (pcmd->argval[0].uval < NTP_OLDVERSION
|| pcmd->argval[0].uval > NTP_VERSION) {
(void) fprintf(stderr, "versions %d to %d, please\n",
NTP_OLDVERSION, NTP_VERSION);
} else {
pktversion = (u_char) pcmd->argval[0].uval;
}
}
}
/*
* warning - print a warning message
*/
static void
warning(
const char *fmt,
const char *st1,
const char *st2
)
{
(void) fprintf(stderr, "%s: ", progname);
(void) fprintf(stderr, fmt, st1, st2);
(void) fprintf(stderr, ": ");
perror("");
}
/*
* error - print a message and exit
*/
static void
error(
const char *fmt,
const char *st1,
const char *st2
)
{
warning(fmt, st1, st2);
exit(1);
}
/*
* getkeyid - prompt the user for a keyid to use
*/
static u_long
getkeyid(
const char *keyprompt
)
{
register char *p;
register int c;
FILE *fi;
char pbuf[20];
#ifndef SYS_WINNT
if ((fi = fdopen(open("/dev/tty", 2), "r")) == NULL)
#else
if ((fi = _fdopen((int)GetStdHandle(STD_INPUT_HANDLE), "r")) == NULL)
#endif /* SYS_WINNT */
fi = stdin;
else
setbuf(fi, (char *)NULL);
fprintf(stderr, "%s", keyprompt); fflush(stderr);
for (p=pbuf; (c = getc(fi))!='\n' && c!=EOF;) {
if (p < &pbuf[18])
*p++ = c;
}
*p = '\0';
if (fi != stdin)
fclose(fi);
if (strcmp(pbuf, "0") == 0)
return 0;
return (u_long) atoi(pbuf);
}
/*
* atoascii - printable-ize possibly ascii data using the character
* transformations cat -v uses.
*/
static void
atoascii(
int length,
char *data,
char *outdata
)
{
register u_char *cp;
register u_char *ocp;
register u_char c;
if (!data)
{
*outdata = '\0';
return;
}
ocp = (u_char *)outdata;
for (cp = (u_char *)data; cp < (u_char *)data + length; cp++) {
c = *cp;
if (c == '\0')
break;
if (c == '\0')
break;
if (c > 0177) {
*ocp++ = 'M';
*ocp++ = '-';
c &= 0177;
}
if (c < ' ') {
*ocp++ = '^';
*ocp++ = c + '@';
} else if (c == 0177) {
*ocp++ = '^';
*ocp++ = '?';
} else {
*ocp++ = c;
}
if (ocp >= ((u_char *)outdata + length - 4))
break;
}
*ocp++ = '\0';
}
/*
* makeascii - print possibly ascii data using the character
* transformations that cat -v uses.
*/
static void
makeascii(
int length,
char *data,
FILE *fp
)
{
register u_char *cp;
register int c;
for (cp = (u_char *)data; cp < (u_char *)data + length; cp++) {
c = (int)*cp;
if (c > 0177) {
putc('M', fp);
putc('-', fp);
c &= 0177;
}
if (c < ' ') {
putc('^', fp);
putc(c+'@', fp);
} else if (c == 0177) {
putc('^', fp);
putc('?', fp);
} else {
putc(c, fp);
}
}
}
/*
* asciize - same thing as makeascii except add a newline
*/
void
asciize(
int length,
char *data,
FILE *fp
)
{
makeascii(length, data, fp);
putc('\n', fp);
}
/*
* Some circular buffer space
*/
#define CBLEN 80
#define NUMCB 6
char circ_buf[NUMCB][CBLEN];
int nextcb = 0;
/*
* nextvar - find the next variable in the buffer
*/
int
nextvar(
int *datalen,
char **datap,
char **vname,
char **vvalue
)
{
register char *cp;
register char *np;
register char *cpend;
register char *npend; /* character after last */
int quoted = 0;
static char name[MAXVARLEN];
static char value[MAXVALLEN];
cp = *datap;
cpend = cp + *datalen;
/*
* Space past commas and white space
*/
while (cp < cpend && (*cp == ',' || isspace((int)*cp)))
cp++;
if (cp == cpend)
return 0;
/*
* Copy name until we hit a ',', an '=', a '\r' or a '\n'. Backspace
* over any white space and terminate it.
*/
np = name;
npend = &name[MAXVARLEN];
while (cp < cpend && np < npend && *cp != ',' && *cp != '='
&& *cp != '\r' && *cp != '\n')
*np++ = *cp++;
/*
* Check if we ran out of name space, without reaching the end or a
* terminating character
*/
if (np == npend && !(cp == cpend || *cp == ',' || *cp == '=' ||
*cp == '\r' || *cp == '\n'))
return 0;
while (isspace((int)(*(np-1))))
np--;
*np = '\0';
*vname = name;
/*
* Check if we hit the end of the buffer or a ','. If so we are done.
*/
if (cp == cpend || *cp == ',' || *cp == '\r' || *cp == '\n') {
if (cp != cpend)
cp++;
*datap = cp;
*datalen = cpend - cp;
*vvalue = (char *)0;
return 1;
}
/*
* So far, so good. Copy out the value
*/
cp++; /* past '=' */
while (cp < cpend && (isspace((int)*cp) && *cp != '\r' && *cp != '\n'))
cp++;
np = value;
npend = &value[MAXVALLEN];
while (cp < cpend && np < npend && ((*cp != ',') || quoted))
{
quoted ^= ((*np++ = *cp++) == '"');
}
/*
* Check if we overran the value buffer while still in a quoted string
* or without finding a comma
*/
if (np == npend && (quoted || *cp != ','))
return 0;
/*
* Trim off any trailing whitespace
*/
while (np > value && isspace((int)(*(np-1))))
np--;
*np = '\0';
/*
* Return this. All done.
*/
if (cp != cpend)
cp++;
*datap = cp;
*datalen = cpend - cp;
*vvalue = value;
return 1;
}
/*
* findvar - see if this variable is known to us
*/
int
findvar(
char *varname,
struct ctl_var *varlist
)
{
register char *np;
register struct ctl_var *vl;
vl = varlist;
np = varname;
while (vl->fmt != EOV) {
if (vl->fmt != PADDING && STREQ(np, vl->text))
return vl->code;
vl++;
}
return 0;
}
/*
* printvars - print variables returned in response packet
*/
void
printvars(
int length,
char *data,
int status,
int sttype,
FILE *fp
)
{
if (rawmode)
rawprint(sttype, length, data, status, fp);
else
cookedprint(sttype, length, data, status, fp);
}
/*
* rawprint - do a printout of the data in raw mode
*/
static void
rawprint(
int datatype,
int length,
char *data,
int status,
FILE *fp
)
{
register char *cp;
register char *cpend;
/*
* Essentially print the data as is. We reformat unprintables, though.
*/
cp = data;
cpend = data + length;
(void) fprintf(fp, "status=0x%04x,\n", status);
while (cp < cpend) {
if (*cp == '\r') {
/*
* If this is a \r and the next character is a
* \n, supress this, else pretty print it. Otherwise
* just output the character.
*/
if (cp == (cpend-1) || *(cp+1) != '\n')
makeascii(1, cp, fp);
} else if (isspace((int)*cp) || isprint((int)*cp)) {
putc(*cp, fp);
} else {
makeascii(1, cp, fp);
}
cp++;
}
}
/*
* Global data used by the cooked output routines
*/
int out_chars; /* number of characters output */
int out_linecount; /* number of characters output on this line */
/*
* startoutput - get ready to do cooked output
*/
static void
startoutput(void)
{
out_chars = 0;
out_linecount = 0;
}
/*
* output - output a variable=value combination
*/
static void
output(
FILE *fp,
char *name,
char *value
)
{
int lenname;
int lenvalue;
lenname = strlen(name);
lenvalue = strlen(value);
if (out_chars != 0) {
putc(',', fp);
out_chars++;
out_linecount++;
if ((out_linecount + lenname + lenvalue + 3) > MAXOUTLINE) {
putc('\n', fp);
out_chars++;
out_linecount = 0;
} else {
putc(' ', fp);
out_chars++;
out_linecount++;
}
}
fputs(name, fp);
putc('=', fp);
fputs(value, fp);
out_chars += lenname + 1 + lenvalue;
out_linecount += lenname + 1 + lenvalue;
}
/*
* endoutput - terminate a block of cooked output
*/
static void
endoutput(
FILE *fp
)
{
if (out_chars != 0)
putc('\n', fp);
}
/*
* outputarr - output an array of values
*/
static void
outputarr(
FILE *fp,
char *name,
int narr,
l_fp *lfp
)
{
register char *bp;
register char *cp;
register int i;
register int len;
char buf[256];
bp = buf;
/*
* Hack to align delay and offset values
*/
for (i = (int)strlen(name); i < 11; i++)
*bp++ = ' ';
for (i = narr; i > 0; i--) {
if (i != narr)
*bp++ = ' ';
cp = lfptoms(lfp, 2);
len = strlen(cp);
if (len > 7) {
cp[7] = '\0';
len = 7;
}
while (len < 7) {
*bp++ = ' ';
len++;
}
while (*cp != '\0')
*bp++ = *cp++;
lfp++;
}
*bp = '\0';
output(fp, name, buf);
}
static char *
tstflags(
u_long val
)
{
register char *cb, *s;
register int i;
register const char *sep;
sep = "";
i = 0;
s = cb = &circ_buf[nextcb][0];
if (++nextcb >= NUMCB)
nextcb = 0;
sprintf(cb, "%02lx", val);
cb += strlen(cb);
if (!val) {
strcat(cb, " ok");
cb += strlen(cb);
} else {
*cb++ = ' ';
for (i = 0; i < 11; i++) {
if (val & 0x1) {
sprintf(cb, "%s%s", sep, tstflagnames[i]);
sep = ", ";
cb += strlen(cb);
}
val >>= 1;
}
}
*cb = '\0';
return s;
}
/*
* cookedprint - output variables in cooked mode
*/
static void
cookedprint(
int datatype,
int length,
char *data,
int status,
FILE *fp
)
{
register int varid;
char *name;
char *value;
int output_raw;
int fmt;
struct ctl_var *varlist;
l_fp lfp;
long ival;
u_int32 hval;
u_long uval;
l_fp lfparr[8];
int narr;
switch (datatype) {
case TYPE_PEER:
varlist = peer_var;
break;
case TYPE_SYS:
varlist = sys_var;
break;
case TYPE_CLOCK:
varlist = clock_var;
break;
default:
(void) fprintf(stderr, "Unknown datatype(0x%x) in cookedprint\n", datatype);
return;
}
(void) fprintf(fp, "status=%04x %s,\n", status,
statustoa(datatype, status));
startoutput();
while (nextvar(&length, &data, &name, &value)) {
varid = findvar(name, varlist);
if (varid == 0) {
output_raw = '*';
} else {
output_raw = 0;
fmt = varlist[varid].fmt;
switch(fmt) {
case TS:
if (!decodets(value, &lfp))
output_raw = '?';
else
output(fp, name, prettydate(&lfp));
break;
case FL:
case FU:
case FS:
if (!decodetime(value, &lfp))
output_raw = '?';
else {
switch (fmt) {
case FL:
output(fp, name,
lfptoms(&lfp, 3));
break;
case FU:
output(fp, name,
ulfptoms(&lfp, 3));
break;
case FS:
output(fp, name,
lfptoms(&lfp, 3));
break;
}
}
break;
case UI:
if (!decodeuint(value, &uval))
output_raw = '?';
else
output(fp, name, uinttoa(uval));
break;
case SI:
if (!decodeint(value, &ival))
output_raw = '?';
else
output(fp, name, inttoa(ival));
break;
case HA:
case NA:
if (!decodenetnum(value, &hval))
output_raw = '?';
else if (fmt == HA)
output(fp, name, nntohost(hval));
else
output(fp, name, numtoa(hval));
break;
case ST:
output_raw = '*';
break;
case RF:
if (decodenetnum(value, &hval))
output(fp, name, nntohost(hval));
else if ((int)strlen(value) <= 4)
output(fp, name, value);
else
output_raw = '?';
break;
case LP:
if (!decodeuint(value, &uval) || uval > 3)
output_raw = '?';
else {
char b[3];
b[0] = b[1] = '0';
if (uval & 0x2)
b[0] = '1';
if (uval & 0x1)
b[1] = '1';
b[2] = '\0';
output(fp, name, b);
}
break;
case OC:
if (!decodeuint(value, &uval))
output_raw = '?';
else {
char b[10];
(void) sprintf(b, "%03lo", uval);
output(fp, name, b);
}
break;
case MD:
if (!decodeuint(value, &uval))
output_raw = '?';
else
output(fp, name, uinttoa(uval));
break;
case AR:
if (!decodearr(value, &narr, lfparr))
output_raw = '?';
else
outputarr(fp, name, narr, lfparr);
break;
case FX:
if (!decodeuint(value, &uval))
output_raw = '?';
else
output(fp, name, tstflags(uval));
break;
default:
(void) fprintf(stderr,
"Internal error in cookedprint, %s=%s, fmt %d\n",
name, value, fmt);
break;
}
}
if (output_raw != 0) {
char bn[401];
char bv[401];
int len;
atoascii(400, name, bn);
atoascii(400, value, bv);
if (output_raw != '*') {
len = strlen(bv);
bv[len] = output_raw;
bv[len+1] = '\0';
}
output(fp, bn, bv);
}
}
endoutput(fp);
}
/*
* sortassoc - sort associations in the cache into ascending order
*/
void
sortassoc(void)
{
if (numassoc > 1)
qsort(
#ifdef QSORT_USES_VOID_P
(void *)
#else
(char *)
#endif
assoc_cache, (size_t)numassoc,
sizeof(struct association), assoccmp);
}
/*
* assoccmp - compare two associations
*/
#ifdef QSORT_USES_VOID_P
static int
assoccmp(
const void *t1,
const void *t2
)
{
const struct association *ass1 = (const struct association *)t1;
const struct association *ass2 = (const struct association *)t2;
if (ass1->assid < ass2->assid)
return -1;
if (ass1->assid > ass2->assid)
return 1;
return 0;
}
#else
static int
assoccmp(
struct association *ass1,
struct association *ass2
)
{
if (ass1->assid < ass2->assid)
return -1;
if (ass1->assid > ass2->assid)
return 1;
return 0;
}
#endif /* not QSORT_USES_VOID_P */
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