SOME/IP-SD- Entry

Entry

Entry Format Type

Two types of Entries exist: Type 1 Entries for Services and Type 2 Entries for Eventgroups.

Type field of the Entry:

• Layout of Type 1 Entries (Entries for Service)：
  0x00：FindService
  0x01：OfferService和StopOfferService
  
• Layout of Type 2 Entries ( Entries for Eventgroups）
  0x06：SubscribeEventgroup和StopSubscribeEventgroup
  0x07：SubscribeEventgroupAck和SubscribeEventgroupNack
  

Entry Format

• If the number of options is set to zero, the option run is considered empty.
  如果option的数量设置为零，则option run被视为空。
• For empty runs the Index shall be set to zero.
  如果option run为空，index也应设置为零。
• Implementations shall accept and process incoming SD messages with option run length set to zero and option index not set to zero.
  实施应接受并处理option run length设置为0且option index未设置为0的SD传入消息。

Index 1^st options

the index of the first option of the first option run of this entry in the option array
option array中的第一个 option run中的第一个option的索引

Index 2^st options

the index of the first option of the second option run of this entry in the option array
option array中的第二个option run中的第一个option的索引

# of opt 1

the “Number of Option 1” shall carry the number of options the first option run uses
“Number of Option 1”应包含first option run使用的选项的数量

#of opt 2

the “Number of Option 2” shall carry the number of options the second option run uses
“Number of Option 2”应包含second option run使用的选项的数量

Service ID and Instance ID

• Service ID 和 instance ID字段应具有固定的16位大小。
  Servcie或者Eventgroups的Service ID使用参数SdServerServiceID和SdClientServiceID进行静态配置，具体取决于服务器或客户端entry。
  Service或者Eventgroups Service的Instance ID使用参数SdServerServiceInstanceID和SdClientServiceInstanceID进行静态配置，具体取决于服务器还是客户端entry。

• If not a single but all instances are addressed, the Instance ID field of the Type 1 Entry format layout shall be set to 0xFFFF
  对于Entries for Service，如果不是单个实例而是所有实例都被寻址，instance ID字段应设置为0xFFFF。

Major version

• The Major Version field shall have a fixed size of 8 bits.
  Major Version字段应具有固定的8位大小。
• The Major Version field shall carry the SdServerServiceMajorVersion and SdClientServiceMajorVersion, depending on being a server or client entry.
  Major Version字段应包含SdServerServiceMajorVersion和SdClientServiceMajorVersion，具体取决于服务器或客户端entry。

Minor Version

• The Minor Version field of the Type 1 Entry format layout shall have a fixed size of 32 bits.
  Type类型1条目格式布局的Minor Version应具有固定的32位大小。
• The Minor Version field of the Type 1 Entry format layout shall carry the SdServerServiceMinorVersion and SdClientServiceMinorVersion.
  Type类型1条目格式布局的Minor Version字段应携带SdServerServiceMinorVersion和SdClientServiceMinorVersion。

TTL

• The TTL field shall have a fixed size of 24 bits.
  TTL字段应具有固定的24位大小。
• The TTL defines the lifetime of the entry.
  TTL字段定义条目的生存期。
• The TTL field defines the lifetime of the entry in seconds configured using the parameter SdServerTimerTTL and SdClientTimerTTL, except for Stop- or Nack-Entries, which use a TTL of 0.
  TTL字段使用参数SdServerTimerTTL和SdClientTimerTTL以秒为单位定义生命周期，除了TTL本身为0的Stop-或Nack-Entry外。

Reserved Field

• The Reserved field shall have a fixed size of 16 bits.
  保留字段应具有固定的16位大小。

• The Reserved field, which follows the TTL field shall be statically set to 0x0000.
  TTL字段后面的保留字段应静态设置为0x0000。

Eventgroup ID

• The Eventgroup ID field shall have a fixed size of 16 bits.
  Eventgroup ID字段应具有固定的16位大小。
• The Eventgroup ID field shall carry the ID of an Eventgroup, configured using the parameter SdConsumedEventGroupID.
  Eventgroup ID字段应携带使用参数SdConsumedEventGroupID配置的事件组的ID。
• An eventgroup shall be identified using the Eventgroup-ID.
  一个事件组需要使用Eventgroup ID。
• Different eventgroups of a service shall have different Eventgroup-IDs.
  服务的不同Eventgroup应具有不同的 Eventgroup ID。
• An event shall be part of zero to many eventgroups and an eventgroup shall contain zero to many events. A field shall be part of zero to - many eventgroups and an eventgroup can contain zero to many fields.
  一个Event应该是许多Eventgroup的一部分，一个Eventgroup应包含许多Event。一个Field应该是许多Eventgroup的一部分，而Eventgroup可以包含许多Field。
• Currently empty eventgroups are not used and events as well as fields are mapped to at least one eventgroup.
  目前没有使用空的Eventgroups ，Event以及Field被映射到至少一个Eventgroup 。