MOOON distributed message structure

 The main message structure of MOOON is as follows. The disadvantage is that the message occupies a large number of bytes:

 
 

  
  
// Why do I need to differentiate between IPV4 and IPV6?
  
  
// If only IPV4 is supported, a single IP address only needs to be represented in four bytes,
  
  
// In this way, the source and destination IP addresses save a total of 24 bytes;
  
  
// When IPV6 is supported, it is also compatible with IPV4, but 24 bytes are wasted for IPV4;
  
  
// The Source and target IP addresses, either IPV4 or IPV6, cannot cross-appear.
  
  
# Ifdef IPV6_SUPPORTED
  
  
# Define IP_BYTES (4*4) // IPV6 address Length
  
  
# Else
  
  
# Define IP_BYTES 4 // IPV4 address Length
  
  
# Endif
  
  
 
  
  
//////////////////////////////////////// ////////////////////////////////////////
  
  
SCHED_NAMESPACE_BEGIN
  
  
 
  
  
/***
  
  
* Constant definition
  
  
*/
  
  
Enum
  
  
{
  
  
INVALID_SERVICE_ID = 0,
  
  
INVALID_SESSION_ID = 0, // invalid SessionId
  
  
SERVICE_ID_MAX = 100, // The maximum Service ID value. The value starts from 1.
  
  
SESSION_ID_MAX = 10000 // The maximum Session ID value. The value starts from 1.
  
  
};
  
  
 
  
  
// 4-byte alignment
  
  
# Pragma pack (4)
  
  
 
  
  
/***
  
  
* Distributed message Flags Structure
  
  
* Why Should Flags be defined as a struct,
  
  
* Because the nuint32_t type does not support bit expression,
  
  
* Use struct for a layer conversion to achieve the same purpose
  
  
*/
  
  
Typedef struct TDistributedMessageFlags
  
  
{
  
  
// Use union to facilitate operations
  
  
Union Flags
  
  
{
  
  
Uint32_t flags;
  
  
Struct TFlagsBits
  
  
{
  
  
Uint32_t ip_type: 1; // ip address type; optional values: net: IP_TYPE_4 or net: IP_TYPE_6
  
  
Uint32_t reserved: 31; // reserved Bit
  
  
} Flags_bits;
  
  
} Flags;
  
  
 
  
  
TDistributedMessageFlags (uint32_t v)
  
  
: Flags (v)
  
  
{
  
  
}
  
  
} Distribted_message_flags_t;
  
  
 
  
  
/***
  
  
* Distributed message header Structure
  
  
*/
  
  
Typedef struct TDistributedMessage
  
  
{
  
  
Net: common_message_header header; // Message header
  
  
Nuint32_t flags; // flag field
  
  
 
  
  
Nuint32_t source_ip [IP_BYTES]; // the source IP address. If it is an IPV4 address, the value of N is 1; otherwise, the value of 4
  
  
Nuint32_t destination_ip [IP_BYTES]; // ip address of the Message destination. If it is an IPV4 address, the value of N is 1; otherwise, the value of 4
  
  
 
  
  
Nuint16_t source_port; // The source port number.
  
  
Nuint16_t destination_port; // The port number of the Message destination
  
  
 
  
  
Nuint32_t source_service_id; // destination_Service ID
  
  
Nuint32_t destination_service_id; // Service ID of the Message destination
  
  
 
  
  
Nuint32_t source_session_id; // destination_Session ID
  
  
Nuint32_t destination_session_id; // Session ID of the Message destination
  
  
 
  
  
Nuint32_t source_sequence_number; // serial number, starting from 0 and increasing sequentially until re-occurrence, used to solve timed_wait problems similar to TCP
  
  
Nuint32_t destination_sequence_number; // serial number, starting from 0 and increasing sequentially until re-occurrence, used to solve timed_wait problems similar to TCP
  
  
 
  
  
Nuint32_t source_thread_affinity; // The value of the thread to establish a binding relationship with the thread.
  
  
Nuint32_t destination_thread_affinity; // The value of the thread to establish a binding relationship with the thread.
  
  
 
  
  
Char data [0]; // message content
  
  
 
  
  
Std: string to_string () const;
  
  
} Distribted_message_t;
  
  
 
  
  
# Pragma pack ()
  
  
 
  
  
Inline bool is_valid_service (uint32_t service_id)
  
  
{
  
  
Return service_id> 0
  
  
& Service_id <= SERVICE_ID_MAX;
  
  
}
  
  
 
  
  
Inline bool is_valid_session (uint32_t session_id)
  
  
{
  
  
Return session_id> 0
  
  
& Session_id <= SESSION_ID_MAX;
  
  
}
  
  
 
  
  
//////////////////////////////////////// ////////////////////////////////////////
  
  
SCHED_NAMESPACE_END
 
 

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This article is from the "Fei Yue" blog, please be sure to keep this source http://mooon.blog.51cto.com/1246491/948302