clntraw_create - Linux


clntraw_create creates a raw Sun RPC client handle for communication with a specific RPC program and version. It provides a low-level interface for customizing RPC interactions and is particularly useful in scenarios where the standard RPC client API is insufficient.


clntraw_create(program, version, host, auth)

Required Arguments:

  • program: The RPC program number to connect to.
  • version: The RPC program version to connect to.
  • host: The hostname or IP address of the RPC server to connect to.


  • auth: An RPC authentication handle. If not provided, the default authentication method (usually Unix or Kerberos) will be used.


Simple Connection:

Connect to the RPC server on running program 1, version 2:

clntraw_create(1, 2, "")

Custom Authentication:

Use a Kerberos authentication handle to connect:

auth = authkerb_create("me@EXAMPLE.COM", "", "")
clntraw_create(1, 2, "", auth)

Common Issues

  • Connection Refused: Ensure that the RPC server is running and accepting connections on the specified program and version.
  • Authentication Failure: Verify that the provided authentication handle is valid and has the necessary permissions.
  • RPC Protocol Mismatch: Check that the client and server have compatible RPC protocol versions.


Custom RPC Implementations:

clntraw_create can be used as the foundation for building custom RPC implementations. You can:

  • Create multiple client handles to communicate with different RPC programs and versions.
  • Implement custom authentication mechanisms.
  • Control RPC transport and serialization mechanisms.

Related Commands

  • rpcinfo: Displays RPC program and version information.
  • rpcgen: Generates C code for RPC clients and servers.