What is the relationship of SMB and SAMR protocol?

Question

I try to create user in samba server and found out that samr protocol is used for that

Based on https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-samr/084da2e7-0ba0-44fc-8f17-e8a200c69eb5

RPC clients for this protocol MUST use RPC over TCP/IP for the SamrValidatePassword method and MUST use RPC over SMB for the SamrSetDSRMPassword method.

I understood that there are some relationship between smb and samr.

Could you please explain the hierarchy of of those protocols ?

I want to know it because most articles mention that Samba server support smb protocol and from java I can use jcifs library.

JCIFS is an Open Source client library that implements the CIFS/SMB networking protocol in 100% Java

Also I noticed that this library contains classes where you can notice samr in the name https://github.com/codelibs/jcifs/tree/master/src/main/java/jcifs/dcerpc/msrpc

So what is relationship of samr and smb ?

Answer 1

Based on this

IP < TCP < SMB Named Pipes < MSRPC

• MSRPC works over SMB Named Pipes
• SAMR works over MSRPC