The main tasks of the Service Discovery Protocol are communicating the availability of functional entities called services in the in-vehicle communication as well as controlling the send behavior of event messages. This allows sending only event messages to receivers requiring them (Publish/Subscribe). The solution described here is also known as SOME/IP-SD (Scalable service-Oriented MiddlewarE over IP - Service Discovery).
This page hosts a formal specification of AUTOSAR SOME/IP Service Discovery using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
All parsing code for C# generated by Kaitai Struct depends on the C# runtime library. You have to install it before you can parse data.
The C# runtime library is available in the NuGet Gallery. Installation instructions can also be found there.
Parse a local file and get structure in memory:
var data = SomeIpSd.FromFile("path/to/local/file.bin");
Or parse structure from a byte array:
byte[] someArray = new byte[] { ... };
var data = new SomeIpSd(new KaitaiStream(someArray));
After that, one can get various attributes from the structure by accessing properties like:
data.Flags // => The SOME/IP-SD Header shall start with an 8 Bit field called flags.
// This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
namespace Kaitai
{
/// <summary>
/// The main tasks of the Service Discovery Protocol are communicating the
/// availability of functional entities called services in the in-vehicle
/// communication as well as controlling the send behavior of event messages.
/// This allows sending only event messages to receivers requiring them (Publish/Subscribe).
/// The solution described here is also known as SOME/IP-SD
/// (Scalable service-Oriented MiddlewarE over IP - Service Discovery).
/// </summary>
/// <remarks>
/// Reference: <a href="https://www.autosar.org/fileadmin/standards/foundation/19-11/AUTOSAR_PRS_SOMEIPServiceDiscoveryProtocol.pdf">Source</a>
/// </remarks>
public partial class SomeIpSd : KaitaiStruct
{
public static SomeIpSd FromFile(string fileName)
{
return new SomeIpSd(new KaitaiStream(fileName));
}
public SomeIpSd(KaitaiStream p__io, KaitaiStruct p__parent = null, SomeIpSd p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root ?? this;
_read();
}
private void _read()
{
_flags = new SdFlags(m_io, this, m_root);
_reserved = m_io.ReadBytes(3);
_lenEntries = m_io.ReadU4be();
__raw_entries = m_io.ReadBytes(LenEntries);
var io___raw_entries = new KaitaiStream(__raw_entries);
_entries = new SomeIpSdEntries(io___raw_entries);
_lenOptions = m_io.ReadU4be();
__raw_options = m_io.ReadBytes(LenOptions);
var io___raw_options = new KaitaiStream(__raw_options);
_options = new SomeIpSdOptions(io___raw_options);
}
/// <remarks>
/// Reference: AUTOSAR_PRS_SOMEIPServiceDiscoveryProtocol.pdf - Figure 4.3
/// </remarks>
public partial class SdFlags : KaitaiStruct
{
public static SdFlags FromFile(string fileName)
{
return new SdFlags(new KaitaiStream(fileName));
}
public SdFlags(KaitaiStream p__io, SomeIpSd p__parent = null, SomeIpSd p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
_read();
}
private void _read()
{
_reboot = m_io.ReadBitsIntBe(1) != 0;
_unicast = m_io.ReadBitsIntBe(1) != 0;
_initialData = m_io.ReadBitsIntBe(1) != 0;
_reserved = m_io.ReadBitsIntBe(5);
}
private bool _reboot;
private bool _unicast;
private bool _initialData;
private ulong _reserved;
private SomeIpSd m_root;
private SomeIpSd m_parent;
public bool Reboot { get { return _reboot; } }
public bool Unicast { get { return _unicast; } }
public bool InitialData { get { return _initialData; } }
public ulong Reserved { get { return _reserved; } }
public SomeIpSd M_Root { get { return m_root; } }
public SomeIpSd M_Parent { get { return m_parent; } }
}
private SdFlags _flags;
private byte[] _reserved;
private uint _lenEntries;
private SomeIpSdEntries _entries;
private uint _lenOptions;
private SomeIpSdOptions _options;
private SomeIpSd m_root;
private KaitaiStruct m_parent;
private byte[] __raw_entries;
private byte[] __raw_options;
/// <summary>
/// The SOME/IP-SD Header shall start with an 8 Bit field called flags.
/// </summary>
public SdFlags Flags { get { return _flags; } }
public byte[] Reserved { get { return _reserved; } }
public uint LenEntries { get { return _lenEntries; } }
public SomeIpSdEntries Entries { get { return _entries; } }
public uint LenOptions { get { return _lenOptions; } }
public SomeIpSdOptions Options { get { return _options; } }
public SomeIpSd M_Root { get { return m_root; } }
public KaitaiStruct M_Parent { get { return m_parent; } }
public byte[] M_RawEntries { get { return __raw_entries; } }
public byte[] M_RawOptions { get { return __raw_options; } }
}
}