Revision as of 18:38, 2 October 2022

YSF Direct Protocol

The target if this protocol is to allow users to connect their SystemFusion YSF-enabled hotspots and repeaters directly to BrandMeister.

YSF Direct is an extension to existing YSF reflector protocol.

• IPv4 only
• Standard YSFD and YSFP messages (user has to ping a server)
• Additional messages (all of them similar to MMDVM DMR's protocol):
  • Login messages (YSFL / YSFK)
  • Configuration option message (YSFO)
  • Status messages (YSFACK / YSFNACK)

Unused characters in callsign field should be filled with NULL characters.

Login procedure

1. User -> Server: "YSFL" <10 characters of hotspot/repeater callsign>
2. Server -> User: "YSFACK" <10 characters of server callsign> <4 bytes of salt>
3. User -> Server: "YSFK" <10 characters of hotspot/repeater callsign> <32 bytes of SHA256(salt + password)>
4. Server -> User: "YSFACK" <10 characters of server callsign>

In case of failure: "YSFNAK" <10 characters of server callsign> <4 bytes of salt>

Change assigned talk group

The message can be sent anytime when hotspot/repeater connected and authenticated.

1. User -> Server: "YSFO" <10 characters of hotspot/repeater callsign> "group=" <ASCII string contains a talk group number (NULL-termination is optional)>
2. Server -> User: "YSFACK" <10 characters of server callsign>

In case of failure: "YSFNAK" <10 characters of server callsign>

Example

Request:

YSFOMYCALLSIGNgroup=91

Response:

YSFACKSERVERCALL