The Tcpdump Group git mirrors - tcpdump/blob - print-someip.c

   1 /*
   2  * Redistribution and use in source and binary forms, with or without
   3  * modification, are permitted provided that: (1) source code
   4  * distributions retain the above copyright notice and this paragraph
   5  * in its entirety, and (2) distributions including binary code include
   6  * the above copyright notice and this paragraph in its entirety in
   7  * the documentation or other materials provided with the distribution.
   8  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
   9  * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
  10  * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  11  * FOR A PARTICULAR PURPOSE.
  12  *
  13  * Original code by Francesco Fondelli (francesco dot fondelli, gmail dot com)
  14  */
  15
  16 /* \summary: Autosar SOME/IP Protocol printer */
  17
  18 #include <config.h>
  19
  20 #include "netdissect-stdinc.h"
  21 #include "netdissect.h"
  22 #include "extract.h"
  23
  24 /*
  25  * SOMEIP Header (R19-11)
  26  *
  27  *     0                   1                   2                   3
  28  *     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
  29  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  30  *    |               Message ID (Service ID/Method ID)               |
  31  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  32  *    |                           Length                              |
  33  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  34  *    |               Request ID (Client ID/Session ID)               |
  35  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  36  *    | Protocol Ver  | Interface Ver | Message Type  |  Return Code  |
  37  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  38  *    |                            Payload                            |
  39  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  40  */
  41
  42 static const struct tok message_type_values[] = {
  43     { 0x00, "REQUEST" },
  44     { 0x01, "REQUEST_NO_RETURN" },
  45     { 0x02, "NOTIFICATION" },
  46     { 0x80, "RESPONSE" },
  47     { 0x81, "ERROR" },
  48     { 0x20, "TP_REQUEST" },
  49     { 0x21, "TP_REQUEST_NO_RETURN" },
  50     { 0x22, "TP_NOTIFICATION" },
  51     { 0xa0, "TP_RESPONSE" },
  52     { 0xa1, "TP_ERROR" },
  53     { 0, NULL }
  54 };
  55
  56 static const struct tok return_code_values[] = {
  57     { 0x00, "E_OK" },
  58     { 0x01, "E_NOT_OK" },
  59     { 0x02, "E_UNKNOWN_SERVICE" },
  60     { 0x03, "E_UNKNOWN_METHOD" },
  61     { 0x04, "E_NOT_READY" },
  62     { 0x05, "E_NOT_REACHABLE" },
  63     { 0x06, "E_TIMEOUT" },
  64     { 0x07, "E_WRONG_PROTOCOL_VERSION" },
  65     { 0x08, "E_WRONG_INTERFACE_VERSION" },
  66     { 0x09, "E_MALFORMED_MESSAGE" },
  67     { 0x0a, "E_WRONG_MESSAGE_TYPE" },
  68     { 0x0b, "E_E2E_REPEATED" },
  69     { 0x0c, "E_E2E_WRONG_SEQUENCE" },
  70     { 0x0d, "E_E2E" },
  71     { 0x0e, "E_E2E_NOT_AVAILABLE" },
  72     { 0x0f, "E_E2E_NO_NEW_DATA" },
  73     { 0, NULL }
  74 };
  75
  76 void
  77 someip_print(netdissect_options *ndo, const u_char *bp, const u_int len)
  78 {
  79     uint32_t message_id;
  80     uint16_t service_id;
  81     uint16_t method_or_event_id;
  82     uint8_t event_flag;
  83     uint32_t message_len;
  84     uint32_t request_id;
  85     uint16_t client_id;
  86     uint16_t session_id;
  87     uint8_t protocol_version;
  88     uint8_t interface_version;
  89     uint8_t message_type;
  90     uint8_t return_code;
  91
  92     ndo->ndo_protocol = "someip";
  93     nd_print_protocol_caps(ndo);
  94
  95     if (len < 16) {
  96         goto invalid;
  97     }
  98
  99     message_id = GET_BE_U_4(bp);
 100     service_id = message_id >> 16;
 101     event_flag = (message_id & 0x00008000) >> 15;
 102     method_or_event_id = message_id & 0x00007FFF;
 103     bp += 4;
 104     ND_PRINT(", service %u, %s %u",
 105              service_id, event_flag ? "event" : "method", method_or_event_id);
 106
 107     message_len = GET_BE_U_4(bp);
 108     bp += 4;
 109     ND_PRINT(", len %u", message_len);
 110
 111     request_id = GET_BE_U_4(bp);
 112     client_id = request_id >> 16;
 113     session_id = request_id & 0x0000FFFF;
 114     bp += 4;
 115     ND_PRINT(", client %u, session %u", client_id, session_id);
 116
 117     protocol_version = GET_U_1(bp);
 118     bp += 1;
 119     ND_PRINT(", pver %u", protocol_version);
 120
 121     interface_version = GET_U_1(bp);
 122     bp += 1;
 123     ND_PRINT(", iver %u", interface_version);
 124
 125     message_type = GET_U_1(bp);
 126     bp += 1;
 127     ND_PRINT(", msgtype %s",
 128              tok2str(message_type_values, "Unknown", message_type));
 129
 130     return_code = GET_U_1(bp);
 131     bp += 1;
 132     ND_PRINT(", retcode %s",
 133              tok2str(return_code_values, "Unknown", return_code));
 134
 135     return;
 136
 137 invalid:
 138     nd_print_invalid(ndo);
 139 }