Revision as of 13:58, 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:
  • Login messages (YSFL / YSFK) - similar to MMDVM DMR's protocol
  • Configuration message (YSFO) - to assign a talk group
  • Status messages (YSFACK / YSFNACK)

Login procedure

1. User -> Server: "YSFL" <10 characters of call-sign>
2. Sever -> User: "YSFACK" <4 bytes of salt>
3. User -> Server: "YSFK" <10 characters of call-sign> <32 bytes of SHA256(salt + password)>
4. Sever -> User: "YSFACK"

In case of failure: "YSFNAK" <4 bytes of salt>

Change assigned talk group

1. User -> Server: "YSFO" <10 characters of call-sign> "group=" <string contains a talk group number>
2. Sever -> User: "YSFACK" <10 characters of call-sign>

In case of failure: "YSFNAK" <10 characters of call-sign>