mirror of
https://github.com/the-tcpdump-group/tcpdump.git
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93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
// Copyright (c) 2018 Arista Networks, Inc. All rights reserved.
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/* \summary: EtherType protocol for Arista Networks printer */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#include "netdissect.h"
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#include "extract.h"
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#include "addrtoname.h"
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#define ARISTA_SUBTYPE_TIMESTAMP 0x01
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#define ARISTA_TIMESTAMP_64_TAI 0x0010
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#define ARISTA_TIMESTAMP_64_UTC 0x0110
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#define ARISTA_TIMESTAMP_48_TAI 0x0020
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#define ARISTA_TIMESTAMP_48_UTC 0x0120
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static const struct tok ts_version_name[] = {
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{ ARISTA_TIMESTAMP_64_TAI, "TAI(64-bit)" },
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{ ARISTA_TIMESTAMP_64_UTC, "UTC(64-bit)" },
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{ ARISTA_TIMESTAMP_48_TAI, "TAI(48-bit)" },
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{ ARISTA_TIMESTAMP_48_UTC, "UTC(48-bit)" },
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{ 0, NULL }
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};
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static inline void
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arista_print_date_hms_time(netdissect_options *ndo, uint32_t seconds,
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uint32_t nanoseconds)
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{
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time_t ts;
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struct tm *tm;
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char buf[BUFSIZE];
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ts = seconds + (nanoseconds / 1000000000);
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if (NULL == (tm = gmtime(&ts)))
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ND_PRINT(": gmtime() error");
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else if (0 == strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
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ND_PRINT(": strftime() error");
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else
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ND_PRINT(": %s, %09u ns, ", buf, nanoseconds);
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}
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int
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arista_ethertype_print(netdissect_options *ndo, const u_char *bp, u_int len _U_)
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{
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uint16_t subTypeId;
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uint16_t version;
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u_short bytesConsumed = 0;
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u_short size = 0;
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uint32_t seconds, nanoseconds;
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ndo->ndo_protocol = "arista";
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subTypeId = GET_BE_U_2(bp);
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bp += 2;
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version = GET_BE_U_2(bp);
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bp += 2;
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bytesConsumed += 4;
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ND_PRINT("SubType: 0x%1x, Version: 0x%04x, ", subTypeId, version);
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// TapAgg Header Timestamping
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if (subTypeId == ARISTA_SUBTYPE_TIMESTAMP) {
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// Timestamp has 32-bit lsb in nanosec and remaining msb in sec
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ND_PRINT("Timestamp %s", tok2str(ts_version_name,
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"Unknown timestamp Version 0x%04x ", version));
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switch (version) {
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case ARISTA_TIMESTAMP_64_TAI:
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case ARISTA_TIMESTAMP_64_UTC:
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seconds = GET_BE_U_4(bp);
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nanoseconds = GET_BE_U_4(bp + 4);
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arista_print_date_hms_time(ndo, seconds, nanoseconds);
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bytesConsumed += size + 8;
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break;
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case ARISTA_TIMESTAMP_48_TAI:
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case ARISTA_TIMESTAMP_48_UTC:
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ND_PRINT(": Seconds %u,", GET_BE_U_2(bp));
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ND_PRINT(" Nanoseconds %u, ", GET_BE_U_4(bp + 2));
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bytesConsumed += size + 6;
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break;
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default:
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return -1;
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}
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} else {
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return -1;
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}
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return bytesConsumed;
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}
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