VPPHostStack

Description

VPP's host stack is a user space implementation of a number of transport, session and application layer protocols that leverages VPP's existing protocol stack. It roughly consists of four major components:

• Session Layer that accepts pluggable transport protocols
• Shared memory mechanisms for pushing data between VPP and applications
• Transport protocol implementations (e.g. TCP, SCTP, UDP)
• Comms Library (VCL) and LD_PRELOAD Library

Start Here

Set Up Dev Environment - Explains how to set up a VPP development environment and the requirements for using the build tools

Getting Started

Applications can link against the following APIs for host-stack service:

• Builtin C API. It can only be used by applications hosted within VPP
• "Raw" session layer API. It does not offer any support for async communication
• VCL API that offers a POSIX-like interface. It comes with its own epoll implementation.
• POSIX API through LD_PRELOAD

A number of test applications can be used to exercise these APIs.

Builtin Echo Server/Client

Once two vpp instances are brought and conf, the builtin echo apps can be

VCL socket client/server

For more details see the tutorial here

Session Layer Architecture

Running List of Presentations

• DPDK Summit North America 2017
• FD.io Mini Summit KubeCon 2017