| Elliott Hughes | 820eced | 2021-08-20 18:00:50 -0700 | [diff] [blame] | 1 | // Copyright (c) 2018 Arista Networks, Inc. All rights reserved. |
| 2 | |
| 3 | /* \summary: EtherType protocol for Arista Networks printer */ |
| 4 | |
| 5 | #ifdef HAVE_CONFIG_H |
| 6 | #include <config.h> |
| 7 | #endif |
| 8 | |
| 9 | #include "netdissect-stdinc.h" |
| 10 | |
| 11 | #include "netdissect.h" |
| 12 | #include "extract.h" |
| 13 | #include "addrtoname.h" |
| 14 | |
| 15 | #define ARISTA_SUBTYPE_TIMESTAMP 0x01 |
| 16 | |
| 17 | #define ARISTA_TIMESTAMP_64_TAI 0x0010 |
| 18 | #define ARISTA_TIMESTAMP_64_UTC 0x0110 |
| 19 | #define ARISTA_TIMESTAMP_48_TAI 0x0020 |
| 20 | #define ARISTA_TIMESTAMP_48_UTC 0x0120 |
| 21 | |
| 22 | static const struct tok ts_version_name[] = { |
| 23 | { ARISTA_TIMESTAMP_64_TAI, "TAI(64-bit)" }, |
| 24 | { ARISTA_TIMESTAMP_64_UTC, "UTC(64-bit)" }, |
| 25 | { ARISTA_TIMESTAMP_48_TAI, "TAI(48-bit)" }, |
| 26 | { ARISTA_TIMESTAMP_48_UTC, "UTC(48-bit)" }, |
| 27 | { 0, NULL } |
| 28 | }; |
| 29 | |
| 30 | static inline void |
| 31 | arista_print_date_hms_time(netdissect_options *ndo, uint32_t seconds, |
| 32 | uint32_t nanoseconds) |
| 33 | { |
| 34 | time_t ts; |
| 35 | struct tm *tm; |
| 36 | char buf[BUFSIZE]; |
| 37 | |
| 38 | ts = seconds + (nanoseconds / 1000000000); |
| 39 | if (NULL == (tm = gmtime(&ts))) |
| 40 | ND_PRINT(": gmtime() error"); |
| 41 | else if (0 == strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm)) |
| 42 | ND_PRINT(": strftime() error"); |
| 43 | else |
| 44 | ND_PRINT(": %s, %09u ns, ", buf, nanoseconds); |
| 45 | } |
| 46 | |
| 47 | int |
| 48 | arista_ethertype_print(netdissect_options *ndo, const u_char *bp, u_int len _U_) |
| 49 | { |
| 50 | uint16_t subTypeId; |
| 51 | uint16_t version; |
| 52 | u_short bytesConsumed = 0; |
| 53 | u_short size = 0; |
| 54 | uint32_t seconds, nanoseconds; |
| 55 | |
| 56 | ndo->ndo_protocol = "arista"; |
| 57 | |
| 58 | subTypeId = GET_BE_U_2(bp); |
| 59 | bp += 2; |
| 60 | version = GET_BE_U_2(bp); |
| 61 | bp += 2; |
| 62 | bytesConsumed += 4; |
| 63 | |
| 64 | ND_PRINT("SubType: 0x%1x, Version: 0x%04x, ", subTypeId, version); |
| 65 | |
| 66 | // TapAgg Header Timestamping |
| 67 | if (subTypeId == ARISTA_SUBTYPE_TIMESTAMP) { |
| 68 | // Timestamp has 32-bit lsb in nanosec and remaining msb in sec |
| 69 | ND_PRINT("Timestamp %s", tok2str(ts_version_name, |
| 70 | "Unknown timestamp Version 0x%04x ", version)); |
| 71 | switch (version) { |
| 72 | case ARISTA_TIMESTAMP_64_TAI: |
| 73 | case ARISTA_TIMESTAMP_64_UTC: |
| 74 | seconds = GET_BE_U_4(bp); |
| 75 | nanoseconds = GET_BE_U_4(bp + 4); |
| 76 | arista_print_date_hms_time(ndo, seconds, nanoseconds); |
| 77 | bytesConsumed += size + 8; |
| 78 | break; |
| 79 | case ARISTA_TIMESTAMP_48_TAI: |
| 80 | case ARISTA_TIMESTAMP_48_UTC: |
| 81 | ND_PRINT(": Seconds %u,", GET_BE_U_2(bp)); |
| 82 | ND_PRINT(" Nanoseconds %u, ", GET_BE_U_4(bp + 2)); |
| 83 | bytesConsumed += size + 6; |
| 84 | break; |
| 85 | default: |
| 86 | return -1; |
| 87 | } |
| 88 | } else { |
| 89 | return -1; |
| 90 | } |
| 91 | return bytesConsumed; |
| 92 | } |