clntraw_create - Linux
Overview
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.
Syntax
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.
Options/Flags
- auth: An RPC authentication handle. If not provided, the default authentication method (usually Unix or Kerberos) will be used.
Examples
Simple Connection:
Connect to the RPC server on example.com
running program 1, version 2:
clntraw_create(1, 2, "example.com")
Custom Authentication:
Use a Kerberos authentication handle to connect:
auth = authkerb_create("me@EXAMPLE.COM", "", "")
clntraw_create(1, 2, "example.com", 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.
Integration
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.