Adding upstream version 4.99.4.upstream/4.99.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 536 insertions, 0 deletions

diff --git a/print-ntp.c b/print-ntp.c
new file mode 100644
index 0000000..537975c
--- /dev/null
+++ b/print-ntp.c
@@ -0,0 +1,536 @@
+/*
+ * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
+ *	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.
+ *
+ *	By Jeffrey Mogul/DECWRL
+ *	loosely based on print-bootp.c
+ */
+
+/* \summary: Network Time Protocol (NTP) printer */
+
+/*
+ * specification:
+ *
+ * RFC 1119 - NTPv2
+ * RFC 1305 - NTPv3
+ * RFC 5905 - NTPv4
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include <time.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+#include "ntp.h"
+
+/*
+ * Based on ntp.h from the U of MD implementation
+ *	This file is based on Version 2 of the NTP spec (RFC1119).
+ */
+
+/* rfc2030
+ *                      1                   2                   3
+ *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |LI | VN  |Mode |    Stratum    |     Poll      |   Precision   |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                          Root Delay                           |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                       Root Dispersion                         |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                     Reference Identifier                      |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * |                   Reference Timestamp (64)                    |
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * |                   Originate Timestamp (64)                    |
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * |                    Receive Timestamp (64)                     |
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * |                    Transmit Timestamp (64)                    |
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                 Key Identifier (optional) (32)                |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * |                                                               |
+ * |                 Message Digest (optional) (128)               |
+ * |                                                               |
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+/* Length of the NTP data message with the mandatory fields ("the header")
+ * and without any optional fields (extension, Key Identifier,
+ * Message Digest).
+ */
+#define NTP_TIMEMSG_MINLEN 48U
+
+struct ntp_time_data {
+	nd_uint8_t status;		/* status of local clock and leap info */
+	nd_uint8_t stratum;		/* Stratum level */
+	nd_int8_t ppoll;		/* poll value */
+	nd_int8_t precision;
+	struct s_fixedpt root_delay;
+	struct s_fixedpt root_dispersion;
+	nd_uint32_t refid;
+	struct l_fixedpt ref_timestamp;
+	struct l_fixedpt org_timestamp;
+	struct l_fixedpt rec_timestamp;
+	struct l_fixedpt xmt_timestamp;
+	nd_uint32_t key_id;
+	nd_uint8_t  message_digest[20];
+};
+/*
+ *	Leap Second Codes (high order two bits)
+ */
+#define	NO_WARNING	0x00	/* no warning */
+#define	PLUS_SEC	0x40	/* add a second (61 seconds) */
+#define	MINUS_SEC	0x80	/* minus a second (59 seconds) */
+#define	ALARM		0xc0	/* alarm condition (clock unsynchronized) */
+
+/*
+ *	Clock Status Bits that Encode Version
+ */
+#define	NTPVERSION_1	0x08
+#define	VERSIONMASK	0x38
+#define	VERSIONSHIFT	3
+#define LEAPMASK	0xc0
+#define LEAPSHIFT	6
+#ifdef MODEMASK
+#undef MODEMASK					/* Solaris sucks */
+#endif
+#define	MODEMASK	0x07
+#define	MODESHIFT	0
+
+/*
+ *	Code values
+ */
+#define	MODE_UNSPEC	0	/* unspecified */
+#define	MODE_SYM_ACT	1	/* symmetric active */
+#define	MODE_SYM_PAS	2	/* symmetric passive */
+#define	MODE_CLIENT	3	/* client */
+#define	MODE_SERVER	4	/* server */
+#define	MODE_BROADCAST	5	/* broadcast */
+#define	MODE_CONTROL	6	/* control message */
+#define	MODE_RES2	7	/* reserved */
+
+/*
+ *	Stratum Definitions
+ */
+#define	UNSPECIFIED	0
+#define	PRIM_REF	1	/* radio clock */
+#define	INFO_QUERY	62	/* **** THIS implementation dependent **** */
+#define	INFO_REPLY	63	/* **** THIS implementation dependent **** */
+
+static void p_sfix(netdissect_options *ndo, const struct s_fixedpt *);
+static void p_ntp_delta(netdissect_options *, const struct l_fixedpt *, const struct l_fixedpt *);
+static void p_poll(netdissect_options *, const int);
+
+static const struct tok ntp_mode_values[] = {
+    { MODE_UNSPEC,    "unspecified" },
+    { MODE_SYM_ACT,   "symmetric active" },
+    { MODE_SYM_PAS,   "symmetric passive" },
+    { MODE_CLIENT,    "Client" },
+    { MODE_SERVER,    "Server" },
+    { MODE_BROADCAST, "Broadcast" },
+    { MODE_CONTROL,   "Control Message" },
+    { MODE_RES2,      "Reserved" },
+    { 0, NULL }
+};
+
+static const struct tok ntp_leapind_values[] = {
+    { NO_WARNING,     "" },
+    { PLUS_SEC,       "+1s" },
+    { MINUS_SEC,      "-1s" },
+    { ALARM,          "clock unsynchronized" },
+    { 0, NULL }
+};
+
+static const struct tok ntp_stratum_values[] = {
+	{ UNSPECIFIED,	"unspecified" },
+	{ PRIM_REF,	"primary reference" },
+	{ 0, NULL }
+};
+
+/* draft-ietf-ntp-mode-6-cmds-02
+ *  0                   1                   2                   3
+ *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |LI |  VN |Mode |R|E|M| OpCode  |       Sequence Number         |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |            Status             |       Association ID          |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |            Offset             |            Count              |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * /                    Data (up to 468 bytes)                     /
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                    Padding (optional)                         |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * /              Authenticator (optional, 96 bytes)               /
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ *               Figure 1: NTP Control Message Header
+ */
+
+/* Length of the NTP control message with the mandatory fields ("the header")
+ * and without any optional fields (Data, Padding, Authenticator).
+ */
+#define NTP_CTRLMSG_MINLEN 12U
+
+struct ntp_control_data {
+	nd_uint8_t	magic;		/* LI, VN, Mode */
+	nd_uint8_t	control;	/* R, E, M, OpCode */
+	nd_uint16_t	sequence;	/* Sequence Number */
+	nd_uint16_t	status;		/* Status */
+	nd_uint16_t	assoc;		/* Association ID */
+	nd_uint16_t	offset;		/* Offset */
+	nd_uint16_t	count;		/* Count */
+	nd_uint8_t	data[564];	/* Data, [Padding, [Authenticator]] */
+};
+
+/*
+ * Print NTP time requests and responses
+ */
+static void
+ntp_time_print(netdissect_options *ndo,
+	       const struct ntp_time_data *bp, u_int length)
+{
+	uint8_t stratum;
+
+	if (length < NTP_TIMEMSG_MINLEN)
+		goto invalid;
+
+	stratum = GET_U_1(bp->stratum);
+	ND_PRINT(", Stratum %u (%s)",
+		stratum,
+		tok2str(ntp_stratum_values, (stratum >=2 && stratum<=15) ? "secondary reference" : "reserved", stratum));
+
+	ND_PRINT(", poll %d", GET_S_1(bp->ppoll));
+	p_poll(ndo, GET_S_1(bp->ppoll));
+
+	ND_PRINT(", precision %d", GET_S_1(bp->precision));
+
+	ND_TCHECK_SIZE(&bp->root_delay);
+	ND_PRINT("\n\tRoot Delay: ");
+	p_sfix(ndo, &bp->root_delay);
+
+	ND_TCHECK_SIZE(&bp->root_dispersion);
+	ND_PRINT(", Root dispersion: ");
+	p_sfix(ndo, &bp->root_dispersion);
+
+	ND_TCHECK_4(bp->refid);
+	ND_PRINT(", Reference-ID: ");
+	/* Interpretation depends on stratum */
+	switch (stratum) {
+
+	case UNSPECIFIED:
+		ND_PRINT("(unspec)");
+		break;
+
+	case PRIM_REF:
+		if (nd_printn(ndo, (const u_char *)&(bp->refid), 4, ndo->ndo_snapend))
+			goto trunc;
+		break;
+
+	case INFO_QUERY:
+		ND_PRINT("%s INFO_QUERY", GET_IPADDR_STRING(bp->refid));
+		/* this doesn't have more content */
+		return;
+
+	case INFO_REPLY:
+		ND_PRINT("%s INFO_REPLY", GET_IPADDR_STRING(bp->refid));
+		/* this is too complex to be worth printing */
+		return;
+
+	default:
+		/* In NTPv4 (RFC 5905) refid is an IPv4 address or first 32 bits of
+		   MD5 sum of IPv6 address */
+		ND_PRINT("0x%08x", GET_BE_U_4(bp->refid));
+		break;
+	}
+
+	ND_TCHECK_SIZE(&bp->ref_timestamp);
+	ND_PRINT("\n\t  Reference Timestamp:  ");
+	p_ntp_time(ndo, &(bp->ref_timestamp));
+
+	ND_TCHECK_SIZE(&bp->org_timestamp);
+	ND_PRINT("\n\t  Originator Timestamp: ");
+	p_ntp_time(ndo, &(bp->org_timestamp));
+
+	ND_TCHECK_SIZE(&bp->rec_timestamp);
+	ND_PRINT("\n\t  Receive Timestamp:    ");
+	p_ntp_time(ndo, &(bp->rec_timestamp));
+
+	ND_TCHECK_SIZE(&bp->xmt_timestamp);
+	ND_PRINT("\n\t  Transmit Timestamp:   ");
+	p_ntp_time(ndo, &(bp->xmt_timestamp));
+
+	ND_PRINT("\n\t    Originator - Receive Timestamp:  ");
+	p_ntp_delta(ndo, &(bp->org_timestamp), &(bp->rec_timestamp));
+
+	ND_PRINT("\n\t    Originator - Transmit Timestamp: ");
+	p_ntp_delta(ndo, &(bp->org_timestamp), &(bp->xmt_timestamp));
+
+	/* FIXME: this code is not aware of any extension fields */
+	if (length == NTP_TIMEMSG_MINLEN + 4) {	/* Optional: key-id (crypto-NAK) */
+		ND_PRINT("\n\tKey id: %u", GET_BE_U_4(bp->key_id));
+	} else if (length == NTP_TIMEMSG_MINLEN + 4 + 16) {	/* Optional: key-id + 128-bit digest */
+		ND_PRINT("\n\tKey id: %u", GET_BE_U_4(bp->key_id));
+		ND_TCHECK_LEN(bp->message_digest, 16);
+		ND_PRINT("\n\tAuthentication: %08x%08x%08x%08x",
+			 GET_BE_U_4(bp->message_digest),
+			 GET_BE_U_4(bp->message_digest + 4),
+			 GET_BE_U_4(bp->message_digest + 8),
+			 GET_BE_U_4(bp->message_digest + 12));
+	} else if (length == NTP_TIMEMSG_MINLEN + 4 + 20) {	/* Optional: key-id + 160-bit digest */
+		ND_PRINT("\n\tKey id: %u", GET_BE_U_4(bp->key_id));
+		ND_TCHECK_LEN(bp->message_digest, 20);
+		ND_PRINT("\n\tAuthentication: %08x%08x%08x%08x%08x",
+			 GET_BE_U_4(bp->message_digest),
+			 GET_BE_U_4(bp->message_digest + 4),
+			 GET_BE_U_4(bp->message_digest + 8),
+			 GET_BE_U_4(bp->message_digest + 12),
+			 GET_BE_U_4(bp->message_digest + 16));
+	} else if (length > NTP_TIMEMSG_MINLEN) {
+		ND_PRINT("\n\t(%u more bytes after the header)", length - NTP_TIMEMSG_MINLEN);
+	}
+	return;
+
+invalid:
+	nd_print_invalid(ndo);
+	ND_TCHECK_LEN(bp, length);
+	return;
+
+trunc:
+	nd_print_trunc(ndo);
+}
+
+/*
+ * Print NTP control message requests and responses
+ */
+static void
+ntp_control_print(netdissect_options *ndo,
+		  const struct ntp_control_data *cd, u_int length)
+{
+	uint8_t control, R, E, M, opcode;
+	uint16_t sequence, status, assoc, offset, count;
+
+	if (length < NTP_CTRLMSG_MINLEN)
+		goto invalid;
+
+	control = GET_U_1(cd->control);
+	R = (control & 0x80) != 0;
+	E = (control & 0x40) != 0;
+	M = (control & 0x20) != 0;
+	opcode = control & 0x1f;
+	ND_PRINT(", %s, %s, %s, OpCode=%u\n",
+		  R ? "Response" : "Request", E ? "Error" : "OK",
+		  M ? "More" : "Last", opcode);
+
+	sequence = GET_BE_U_2(cd->sequence);
+	ND_PRINT("\tSequence=%hu", sequence);
+
+	status = GET_BE_U_2(cd->status);
+	ND_PRINT(", Status=%#hx", status);
+
+	assoc = GET_BE_U_2(cd->assoc);
+	ND_PRINT(", Assoc.=%hu", assoc);
+
+	offset = GET_BE_U_2(cd->offset);
+	ND_PRINT(", Offset=%hu", offset);
+
+	count = GET_BE_U_2(cd->count);
+	ND_PRINT(", Count=%hu", count);
+
+	if (NTP_CTRLMSG_MINLEN + count > length)
+		goto invalid;
+	if (count != 0) {
+		ND_TCHECK_LEN(cd->data, count);
+		ND_PRINT("\n\tTO-BE-DONE: data not interpreted");
+	}
+	return;
+
+invalid:
+	nd_print_invalid(ndo);
+	ND_TCHECK_LEN(cd, length);
+	return;
+
+trunc:
+	nd_print_trunc(ndo);
+}
+
+union ntpdata {
+	struct ntp_time_data	td;
+	struct ntp_control_data	cd;
+};
+
+/*
+ * Print NTP requests, handling the common VN, LI, and Mode
+ */
+void
+ntp_print(netdissect_options *ndo,
+	  const u_char *cp, u_int length)
+{
+	const union ntpdata *bp = (const union ntpdata *)cp;
+	u_int mode, version, leapind;
+	uint8_t status;
+
+	ndo->ndo_protocol = "ntp";
+	status = GET_U_1(bp->td.status);
+
+	version = (status & VERSIONMASK) >> VERSIONSHIFT;
+	ND_PRINT("NTPv%u", version);
+
+	mode = (status & MODEMASK) >> MODESHIFT;
+	if (!ndo->ndo_vflag) {
+		ND_PRINT(", %s, length %u",
+			 tok2str(ntp_mode_values, "Unknown mode", mode),
+			 length);
+		return;
+	}
+
+	ND_PRINT(", %s, length %u\n",
+		  tok2str(ntp_mode_values, "Unknown mode", mode), length);
+
+	/* leapind = (status & LEAPMASK) >> LEAPSHIFT; */
+	leapind = (status & LEAPMASK);
+	ND_PRINT("\tLeap indicator: %s (%u)",
+		 tok2str(ntp_leapind_values, "Unknown", leapind),
+		 leapind);
+
+	switch (mode) {
+
+	case MODE_UNSPEC:
+	case MODE_SYM_ACT:
+	case MODE_SYM_PAS:
+	case MODE_CLIENT:
+	case MODE_SERVER:
+	case MODE_BROADCAST:
+		ntp_time_print(ndo, &bp->td, length);
+		break;
+
+	case MODE_CONTROL:
+		ntp_control_print(ndo, &bp->cd, length);
+		break;
+
+	default:
+		break;			/* XXX: not implemented! */
+	}
+}
+
+static void
+p_sfix(netdissect_options *ndo,
+       const struct s_fixedpt *sfp)
+{
+	int i;
+	int f;
+	double ff;
+
+	i = GET_BE_U_2(sfp->int_part);
+	f = GET_BE_U_2(sfp->fraction);
+	ff = f / 65536.0;		/* shift radix point by 16 bits */
+	f = (int)(ff * 1000000.0);	/* Treat fraction as parts per million */
+	ND_PRINT("%d.%06d", i, f);
+}
+
+/* Prints time difference between *lfp and *olfp */
+static void
+p_ntp_delta(netdissect_options *ndo,
+	    const struct l_fixedpt *olfp,
+	    const struct l_fixedpt *lfp)
+{
+	uint32_t u, uf;
+	uint32_t ou, ouf;
+	uint32_t i;
+	uint32_t f;
+	double ff;
+	int signbit;
+
+	u = GET_BE_U_4(lfp->int_part);
+	ou = GET_BE_U_4(olfp->int_part);
+	uf = GET_BE_U_4(lfp->fraction);
+	ouf = GET_BE_U_4(olfp->fraction);
+	if (ou == 0 && ouf == 0) {
+		p_ntp_time(ndo, lfp);
+		return;
+	}
+
+	if (u > ou) {		/* new is definitely greater than old */
+		signbit = 0;
+		i = u - ou;
+		f = uf - ouf;
+		if (ouf > uf)	/* must borrow from high-order bits */
+			i -= 1;
+	} else if (u < ou) {	/* new is definitely less than old */
+		signbit = 1;
+		i = ou - u;
+		f = ouf - uf;
+		if (uf > ouf)	/* must borrow from the high-order bits */
+			i -= 1;
+	} else {		/* int_part is zero */
+		i = 0;
+		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 = (uint32_t)(ff * 1000000000.0);	/* treat fraction as parts per billion */
+	ND_PRINT("%s%u.%09u", signbit ? "-" : "+", i, f);
+}
+
+/* Prints polling interval in log2 as seconds or fraction of second */
+static void
+p_poll(netdissect_options *ndo,
+       const int poll_interval)
+{
+	if (poll_interval <= -32 || poll_interval >= 32)
+		return;
+
+	if (poll_interval >= 0)
+		ND_PRINT(" (%us)", 1U << poll_interval);
+	else
+		ND_PRINT(" (1/%us)", 1U << -poll_interval);
+}
+