- TCHECK(bp->ref_timestamp);
- fputs("\n\t Reference Timestamp: ", stdout);
- p_ntp_time(&(bp->ref_timestamp));
-
- TCHECK(bp->org_timestamp);
- fputs("\n\t Originator Timestamp: ", stdout);
- p_ntp_time(&(bp->org_timestamp));
-
- TCHECK(bp->rec_timestamp);
- fputs("\n\t Receive Timestamp: ", stdout);
- p_ntp_time(&(bp->rec_timestamp));
-
- TCHECK(bp->xmt_timestamp);
- fputs("\n\t Transmit Timestamp: ", stdout);
- p_ntp_time(&(bp->xmt_timestamp));
-
- fputs("\n\t Originator - Receive Timestamp: ", stdout);
- p_ntp_delta(&(bp->org_timestamp), &(bp->rec_timestamp));
-
- fputs("\n\t Originator - Transmit Timestamp: ", stdout);
- p_ntp_delta(&(bp->org_timestamp), &(bp->xmt_timestamp));
-
- if ( (sizeof(struct ntpdata) - length) == 16) { /* Optional: key-id */
- TCHECK(bp->key_id);
- printf("\n\tKey id: %u", bp->key_id);
- } else if ( (sizeof(struct ntpdata) - length) == 0) { /* Optional: key-id + authentication */
- TCHECK(bp->key_id);
- printf("\n\tKey id: %u", bp->key_id);
- TCHECK2(bp->message_digest, sizeof (bp->message_digest));
- printf("\n\tAuthentication: %08x%08x%08x%08x",
- EXTRACT_32BITS(bp->message_digest),
- EXTRACT_32BITS(bp->message_digest + 4),
- EXTRACT_32BITS(bp->message_digest + 8),
- EXTRACT_32BITS(bp->message_digest + 12));
- }
+ ND_TCHECK(bp->ref_timestamp);
+ ND_PRINT((ndo, "\n\t Reference Timestamp: "));
+ p_ntp_time(ndo, &(bp->ref_timestamp));
+
+ ND_TCHECK(bp->org_timestamp);
+ ND_PRINT((ndo, "\n\t Originator Timestamp: "));
+ p_ntp_time(ndo, &(bp->org_timestamp));
+
+ ND_TCHECK(bp->rec_timestamp);
+ ND_PRINT((ndo, "\n\t Receive Timestamp: "));
+ p_ntp_time(ndo, &(bp->rec_timestamp));
+
+ ND_TCHECK(bp->xmt_timestamp);
+ ND_PRINT((ndo, "\n\t Transmit Timestamp: "));
+ p_ntp_time(ndo, &(bp->xmt_timestamp));
+
+ ND_PRINT((ndo, "\n\t Originator - Receive Timestamp: "));
+ p_ntp_delta(ndo, &(bp->org_timestamp), &(bp->rec_timestamp));
+
+ ND_PRINT((ndo, "\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_TCHECK_4(bp->key_id);
+ ND_PRINT((ndo, "\n\tKey id: %u", EXTRACT_BE_U_4(bp->key_id)));
+ } else if (length == NTP_TIMEMSG_MINLEN + 4 + 16) { /* Optional: key-id + 128-bit digest */
+ ND_TCHECK_4(bp->key_id);
+ ND_PRINT((ndo, "\n\tKey id: %u", EXTRACT_BE_U_4(bp->key_id)));
+ ND_TCHECK2(bp->message_digest, 16);
+ ND_PRINT((ndo, "\n\tAuthentication: %08x%08x%08x%08x",
+ EXTRACT_BE_U_4(bp->message_digest),
+ EXTRACT_BE_U_4(bp->message_digest + 4),
+ EXTRACT_BE_U_4(bp->message_digest + 8),
+ EXTRACT_BE_U_4(bp->message_digest + 12)));
+ } else if (length == NTP_TIMEMSG_MINLEN + 4 + 20) { /* Optional: key-id + 160-bit digest */
+ ND_TCHECK_4(bp->key_id);
+ ND_PRINT((ndo, "\n\tKey id: %u", EXTRACT_BE_U_4(bp->key_id)));
+ ND_TCHECK2(bp->message_digest, 20);
+ ND_PRINT((ndo, "\n\tAuthentication: %08x%08x%08x%08x%08x",
+ EXTRACT_BE_U_4(bp->message_digest),
+ EXTRACT_BE_U_4(bp->message_digest + 4),
+ EXTRACT_BE_U_4(bp->message_digest + 8),
+ EXTRACT_BE_U_4(bp->message_digest + 12),
+ EXTRACT_BE_U_4(bp->message_digest + 16)));
+ } else if (length > NTP_TIMEMSG_MINLEN) {
+ ND_PRINT((ndo, "\n\t(%u more bytes after the header)", length - NTP_TIMEMSG_MINLEN));
+ }
+ return;
+
+invalid:
+ ND_PRINT((ndo, " %s", istr));
+ ND_TCHECK2(*bp, length);
+ return;
+
+trunc:
+ ND_PRINT((ndo, " %s", tstr));
+}
+
+/*
+ * Print NTP control message requests and responses
+ */
+static void
+ntp_control_print(netdissect_options *ndo,
+ register const struct ntp_control_data *cd, u_int length)
+{
+ u_int8_t control, R, E, M, opcode;
+ uint16_t sequence, status, assoc, offset, count;
+
+ if (length < NTP_CTRLMSG_MINLEN)
+ goto invalid;
+
+ ND_TCHECK_1(cd->control);
+ control = EXTRACT_U_1(cd->control);
+ R = (control & 0x80) != 0;
+ E = (control & 0x40) != 0;
+ M = (control & 0x20) != 0;
+ opcode = control & 0x1f;
+ ND_PRINT((ndo, ", %s, %s, %s, OpCode=%u\n",
+ R ? "Response" : "Request", E ? "Error" : "OK",
+ M ? "More" : "Last", opcode));
+
+ ND_TCHECK_2(cd->sequence);
+ sequence = EXTRACT_BE_U_2(cd->sequence);
+ ND_PRINT((ndo, "\tSequence=%hu", sequence));
+
+ ND_TCHECK_2(cd->status);
+ status = EXTRACT_BE_U_2(cd->status);
+ ND_PRINT((ndo, ", Status=%#hx", status));
+
+ ND_TCHECK_2(cd->assoc);
+ assoc = EXTRACT_BE_U_2(cd->assoc);
+ ND_PRINT((ndo, ", Assoc.=%hu", assoc));
+
+ ND_TCHECK_2(cd->offset);
+ offset = EXTRACT_BE_U_2(cd->offset);
+ ND_PRINT((ndo, ", Offset=%hu", offset));
+
+ ND_TCHECK_2(cd->count);
+ count = EXTRACT_BE_U_2(cd->count);
+ ND_PRINT((ndo, ", Count=%hu", count));
+
+ if (NTP_CTRLMSG_MINLEN + count > length)
+ goto invalid;
+ if (count != 0) {
+ ND_TCHECK2(cd->data, count);
+ ND_PRINT((ndo, "\n\tTO-BE-DONE: data not interpreted"));
+ }
+ return;
+
+invalid:
+ ND_PRINT((ndo, " %s", istr));
+ ND_TCHECK2(*cd, length);
+ return;
+
+trunc:
+ ND_PRINT((ndo, " %s", tstr));
+}
+
+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,
+ register const u_char *cp, u_int length)
+{
+ register const union ntpdata *bp = (const union ntpdata *)cp;
+ int mode, version, leapind;
+ uint8_t status;
+
+ ND_TCHECK(bp->td.status);
+ status = EXTRACT_U_1(bp->td.status);
+
+ version = (status & VERSIONMASK) >> VERSIONSHIFT;
+ ND_PRINT((ndo, "NTPv%d", version));
+
+ mode = (status & MODEMASK) >> MODESHIFT;
+ if (!ndo->ndo_vflag) {
+ ND_PRINT((ndo, ", %s, length %u",
+ tok2str(ntp_mode_values, "Unknown mode", mode),
+ length));
+ return;
+ }
+
+ ND_PRINT((ndo, ", %s, length %u\n",
+ tok2str(ntp_mode_values, "Unknown mode", mode), length));
+
+ /* leapind = (status & LEAPMASK) >> LEAPSHIFT; */
+ leapind = (status & LEAPMASK);
+ ND_PRINT((ndo, "\tLeap indicator: %s (%u)",
+ tok2str(ntp_leapind_values, "Unknown", leapind),
+ leapind));
+
+ if (mode >= MODE_UNSPEC && mode <= MODE_BROADCAST)
+ ntp_time_print(ndo, &bp->td, length);
+ else if (mode == MODE_CONTROL)
+ ntp_control_print(ndo, &bp->cd, length);
+ else
+ {;} /* XXX: not implemented! */
projects / tcpdump / blobdiff