Hands-On: SOME/IP Service Implementation

# Configure Wireshark SOME/IP dissector for your service
# Edit → Preferences → Protocols → SOME/IP

# Key settings:
# - SOME/IP port range: 30490 (SD) + 30501 (reliable) + 30502 (unreliable)
# - Service/Method mapping: add Service 0x1234, Method 0x0001 name "GetSpeed"
# - After config: filter on "someip" shows decoded messages

# Useful Wireshark filters:
# someip                              → all SOME/IP traffic
# someip.serviceid == 0x1234          → specific service
# someip.methodid == 0x8001           → specific event
# someip.messagetype == 0             → all REQUESTs
# someip.returncode != 0              → all errors
# someip.sessionid == 5               → trace specific call session
# someipsd                            → SD traffic only
# someipsd.type == 0x01               → OfferService entries only

/* CANoe CAPL: test SOME/IP method call roundtrip */
variables {
    dword test_session_id = 1;
    byte  test_running = 0;
    timer response_timeout;
}

void SendSomeIpRequest(word service_id, word method_id, byte* payload, int len)
{
    byte msg[32];
    /* Build SOME/IP header */
    msg[0]  = (service_id >> 8) & 0xFF;
    msg[1]  = service_id & 0xFF;
    msg[2]  = (method_id >> 8) & 0xFF;
    msg[3]  = method_id & 0xFF;
    msg[4]  = 0; msg[5] = 0; msg[6] = 0; msg[7] = len + 8;  /* Length */
    msg[8]  = 0x00; msg[9] = 0x01;  /* Client ID */
    msg[10] = (test_session_id >> 8); msg[11] = test_session_id & 0xFF;
    msg[12] = 0x01;  /* Protocol Version */
    msg[13] = 0x01;  /* Interface Version */
    msg[14] = 0x00;  /* REQUEST */
    msg[15] = 0x00;  /* E_OK */
    memcpy(msg + 16, payload, len);
    EthSend(msg, 16 + len, "192.168.1.100", 30501);  /* TCP send */
    setTimer(response_timeout, 100);  /* 100 ms timeout */
    test_running = 1;
}

on timer response_timeout {
    if (test_running) {
        write("FAIL: No SOME/IP response within 100ms for session %d", test_session_id);
        test_running = 0;
    }
}

on EthReceive * {
    if (test_running && this.byte(14) == 0x80) {  /* RESPONSE */
        word recv_session = (this.byte(10) << 8) | this.byte(11);
        if (recv_session == test_session_id && this.byte(15) == 0x00) {
            write("PASS: Session %d — Return Code E_OK", test_session_id);
        }
        test_running = 0;
        cancelTimer(response_timeout);
    }
}