RMC Protocol

This is a simple remote method call protocol that lies on top of the PRUDP protocol.

Request Format

Type	Description
Uint32	Size, excluding this field
Uint8	Protocol id, ORed with 0x80
Uint16	Extended protocol id. Only present if the protocol id is 0x7F.
Uint32	Call id, an incrementing number used to match a response to the right request
Uint32	Method id
...	Method parameters

Response Format

Type	Description
Uint32	Size, excluding this field
Uint8	Protocol id
Uint16	Extended protocol id. Only present if the protocol id is 0x7F.
Uint8	0=Error 1=Success

On success:

Type	Description
Uint32	Call id
Uint32	Method id, ORed with 0x8000
...	Response data

On error:

Type	Description
Uint32	Error code, see errors.py
Uint32	Call id

Remarks

The following services never send an RMC response, even if an error occurred:

• Notification Protocol
• Nintendo Notification Event Protocol
• Message Delivery Protocol

Other services always send an RMC response.