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author | pst <pst@FreeBSD.org> | 1996-08-19 20:34:12 +0000 |
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committer | pst <pst@FreeBSD.org> | 1996-08-19 20:34:12 +0000 |
commit | 97a804ef88319863cfa8146c068ec895f4ad8316 (patch) | |
tree | a0e1430e0d74185364854779b70e6d96aba9cf47 /contrib/tcpdump/print-ntp.c | |
download | FreeBSD-src-97a804ef88319863cfa8146c068ec895f4ad8316.zip FreeBSD-src-97a804ef88319863cfa8146c068ec895f4ad8316.tar.gz |
Virgin import of unmodified tcpdump v3.2.1 distribution from LBL.
Obtained from: ftp://ftp.ee.lbl.gov/tcpdump.tar.Z on 19-Aug-1996.
Diffstat (limited to 'contrib/tcpdump/print-ntp.c')
-rw-r--r-- | contrib/tcpdump/print-ntp.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-ntp.c b/contrib/tcpdump/print-ntp.c new file mode 100644 index 0000000..ec6c8f0 --- /dev/null +++ b/contrib/tcpdump/print-ntp.c @@ -0,0 +1,284 @@ +/* + * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Format and print ntp packets. + * By Jeffrey Mogul/DECWRL + * loosely based on print-bootp.c + */ + +#ifndef lint +static char rcsid[] = + "@(#) $Header: print-ntp.c,v 1.23 96/07/23 14:17:26 leres Exp $ (LBL)"; +#endif + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/socket.h> + +#if __STDC__ +struct mbuf; +struct rtentry; +#endif +#include <net/if.h> + +#include <netinet/in.h> +#include <netinet/if_ether.h> + +#include <ctype.h> +#include <stdio.h> +#include <string.h> + +#include "interface.h" +#include "addrtoname.h" +#undef MODEMASK /* Solaris sucks */ +#include "ntp.h" + +static void p_sfix(const struct s_fixedpt *); +static void p_ntp_time(const struct l_fixedpt *); +static void p_ntp_delta(const struct l_fixedpt *, const struct l_fixedpt *); + +/* + * Print ntp requests + */ +void +ntp_print(register const u_char *cp, u_int length) +{ + register const struct ntpdata *bp; + int mode, version, leapind; + static char rclock[5]; + + bp = (struct ntpdata *)cp; + /* Note funny sized packets */ + if (length != sizeof(struct ntpdata)) + (void)printf(" [len=%d]", length); + + TCHECK(bp->status); + + version = (bp->status & VERSIONMASK) >> 3; + printf(" v%d", version); + + leapind = bp->status & LEAPMASK; + switch (leapind) { + + case NO_WARNING: + break; + + case PLUS_SEC: + fputs(" +1s", stdout); + break; + + case MINUS_SEC: + fputs(" -1s", stdout); + break; + } + + mode = bp->status & MODEMASK; + switch (mode) { + + case MODE_UNSPEC: /* unspecified */ + fputs(" unspec", stdout); + break; + + case MODE_SYM_ACT: /* symmetric active */ + fputs(" sym_act", stdout); + break; + + case MODE_SYM_PAS: /* symmetric passive */ + fputs(" sym_pas", stdout); + break; + + case MODE_CLIENT: /* client */ + fputs(" client", stdout); + break; + + case MODE_SERVER: /* server */ + fputs(" server", stdout); + break; + + case MODE_BROADCAST: /* broadcast */ + fputs(" bcast", stdout); + break; + + case MODE_RES1: /* reserved */ + fputs(" res1", stdout); + break; + + case MODE_RES2: /* reserved */ + fputs(" res2", stdout); + break; + + } + + TCHECK(bp->stratum); + printf(" strat %d", bp->stratum); + + TCHECK(bp->ppoll); + printf(" poll %d", bp->ppoll); + + /* Can't TCHECK bp->precision bitfield so bp->distance + 0 instead */ + TCHECK2(bp->distance, 0); + printf(" prec %d", bp->precision); + + if (!vflag) + return; + + TCHECK(bp->distance); + fputs(" dist ", stdout); + p_sfix(&bp->distance); + + TCHECK(bp->dispersion); + fputs(" disp ", stdout); + p_sfix(&bp->dispersion); + + TCHECK(bp->refid); + fputs(" ref ", stdout); + /* Interpretation depends on stratum */ + switch (bp->stratum) { + + case UNSPECIFIED: + printf("(unspec)"); + break; + + case PRIM_REF: + strncpy(rclock, (char *)&(bp->refid), 4); + rclock[4] = '\0'; + fputs(rclock, stdout); + break; + + case INFO_QUERY: + printf("%s INFO_QUERY", ipaddr_string(&(bp->refid))); + /* this doesn't have more content */ + return; + + case INFO_REPLY: + printf("%s INFO_REPLY", ipaddr_string(&(bp->refid))); + /* this is too complex to be worth printing */ + return; + + default: + printf("%s", ipaddr_string(&(bp->refid))); + break; + } + + TCHECK(bp->reftime); + putchar('@'); + p_ntp_time(&(bp->reftime)); + + TCHECK(bp->org); + fputs(" orig ", stdout); + p_ntp_time(&(bp->org)); + + TCHECK(bp->rec); + fputs(" rec ", stdout); + p_ntp_delta(&(bp->org), &(bp->rec)); + + TCHECK(bp->xmt); + fputs(" xmt ", stdout); + p_ntp_delta(&(bp->org), &(bp->xmt)); + + return; + +trunc: + fputs(" [|ntp]", stdout); +} + +static void +p_sfix(register const struct s_fixedpt *sfp) +{ + register int i; + register int f; + register float ff; + + i = ntohs(sfp->int_part); + f = ntohs(sfp->fraction); + ff = f / 65536.0; /* shift radix point by 16 bits */ + f = ff * 1000000.0; /* Treat fraction as parts per million */ + printf("%d.%06d", i, f); +} + +#define FMAXINT (4294967296.0) /* floating point rep. of MAXINT */ + +static void +p_ntp_time(register const struct l_fixedpt *lfp) +{ + register int32_t i; + register u_int32_t uf; + register u_int32_t f; + register float ff; + + i = ntohl(lfp->int_part); + uf = ntohl(lfp->fraction); + ff = uf; + if (ff < 0.0) /* some compilers are buggy */ + ff += FMAXINT; + ff = ff / FMAXINT; /* shift radix point by 32 bits */ + f = ff * 1000000000.0; /* treat fraction as parts per billion */ + printf("%u.%09d", i, f); +} + +/* Prints time difference between *lfp and *olfp */ +static void +p_ntp_delta(register const struct l_fixedpt *olfp, + register const struct l_fixedpt *lfp) +{ + register int32_t i; + register u_int32_t uf; + register u_int32_t ouf; + register u_int32_t f; + register float ff; + int signbit; + + i = ntohl(lfp->int_part) - ntohl(olfp->int_part); + + uf = ntohl(lfp->fraction); + ouf = ntohl(olfp->fraction); + + if (i > 0) { /* new is definitely greater than old */ + signbit = 0; + f = uf - ouf; + if (ouf > uf) /* must borrow from high-order bits */ + i -= 1; + } else if (i < 0) { /* new is definitely less than old */ + signbit = 1; + f = ouf - uf; + if (uf > ouf) /* must carry into the high-order bits */ + i += 1; + i = -i; + } else { /* int_part is zero */ + if (uf > ouf) { + signbit = 0; + f = uf - ouf; + } else { + signbit = 1; + f = ouf - uf; + } + } + + ff = f; + if (ff < 0.0) /* some compilers are buggy */ + ff += FMAXINT; + ff = ff / FMAXINT; /* shift radix point by 32 bits */ + f = ff * 1000000000.0; /* treat fraction as parts per billion */ + if (signbit) + putchar('-'); + else + putchar('+'); + printf("%d.%09d", i, f); +} |