[#39] Cleans up environment

.gitattributes

@@ -1 +1,3 @@
 bin/bpftool filter=lfs diff=lfs merge=lfs -text
+*.svg filter=lfs diff=lfs merge=lfs -text
+

CMakeLists.txt

@@ -71,8 +71,8 @@ write_basic_package_version_file(
     "${version_config}" COMPATIBILITY SameMajorVersion
 )
 
-# set(INCLUDE_INSTALL_DIR include/)
-# set(LIB_INSTALL_DIR lib/ )
+set(INCLUDE_INSTALL_DIR include/)
+set(LIB_INSTALL_DIR lib/ )
 # Configure '<PROJECT-NAME>Config.cmake'
 # Use variables:
 #   * TARGETS_EXPORT_NAME

Makefile

@@ -85,16 +85,16 @@ run-redirect-map-sample: all ## Build all and run BPF XDP redirect sample
 run-control-plane-tests: force-xdp-deload ## Run ControlPlaneTests
 	./tests/scripts/run_test ControlPlaneTests
 
-run-session-manager-tests: force-xdp-deload ## Run SessionManagerTests
-	sudo bash ./tests/scripts/run_test UPFProgramTests
+run-session-manager-tests: force-xdp-deload ## Run SessionManagerTests	
+	sudo -E bash ./tests/scripts/run_test UPFProgramTests
 
 rerun: force-xdp-deload run ## Build all and run BPF XDP UPF
 
 dut-run: ## Run ControlPlaneTests on DUT
 	sudo ./bin/ControlPlaneTests
 
 force-xdp-deload: ## Kill all and force deload XDP programs
-	sudo bash tests/scripts/force_xdp_deload
+	sudo -E bash tests/scripts/force_xdp_deload
 
 trex: ## Install, deploy configuration and run t-rex on remote server
 	tests/scripts/install_trex_remote
@@ -114,6 +114,9 @@ tmux: ## Create a test session using tmux
 docker-build: ## Build development image
 	docker/build_docker
 
+docker-build-ubuntu-18.04: ## Build development image
+	docker/build_docker ubuntu:18.04
+
 docker-run: ## Run development container
 	docker/run_docker
 

README.md

@@ -1,54 +1,86 @@
-User plane function using BPF and XDP for mobile core network (4G/5G).
+# 5G/LTE User Plane using eBPF/XDP
 
-## Usage
-### Build Docker Image
+An open source C++ library powered by eBPF/XDP for user plane in mobile core network (5G/LTE).
 
-Copy the keys to jump server and run `make docker-build`
-### Testing
+This project is based on the following 3GPP Technical Specification:
+- LTE; 5G; Interface between the Control Plane and the User Plane nodes (3GPP TS 29.244 version 16.5.0 Release 16) 
+- 5G; System architecture for the 5G System (5GS) (3GPP TS 23.501 version 16.5.0 Release 16)
 
-![setup-for-GPDU-debug-issue-2-upf-bpf](https://user-images.githubusercontent.com/42647168/86470179-4486cc80-bd11-11ea-8f55-fee848b12e11.png)
+The main goal is to enable in-kernel fast packet processing in third-party UPF/5G or SPGWu/LTE components in order to:
+1. Boost them for those which does not have any fast packet processing enabled, or
+1. Co-locate them with other fast packet processing solutions (e.g. DPDK)
 
-- Open terminal in `Linux #0`
-- Configure veth pairs with `make config-veth-pair` in `Linux #0`
-- Install the spdlog library with `make setup`
-- Build, load and run program with `make run` in `Linux #0`
-- Login remote Scapy `ssh -X [email protected] "cd /work/mestrado/scapy/; sudo -S ./run_scapy"`
-- Generate GTP G-PDU using [Scapy](https://github.com/secdev/scapy) with `gtpu-traffic-generator.py`  in `Linux #1`
-- Open other terminal tab in `Linux #0`
-- Check logs: `sudo cat /sys/kernel/debug/tracing/trace | grep "GPDU"`  in `Linux #0`
+## Design
 
-### Make Commands
+The library is divided in layers: 
+- **Management Layer**: An user space layer responsible to receive requests from the third-party UPF/SPGWu components to manage PFCP sessions and eBPF programs lifecycle
+- **Fast Datapath Layer**: A kernel space layer representing by eBPF/XDP programs responsible to handle the user traffic (datapath)
 
-```
-- all                            Build all
-- clean                          Clean all build files
-- all-verbose                    Build all in verbose mode
-- config-veth-pair               Config veth pair. It must be run before `run-*` targets
-- run-hello-world-samples        Build all and run BPF XDP hello world sample
-- run-redirect-map-sample        Build all and run BPF XDP redirect sample
-- run                            Build all and run BPF XDP UPF
-- run-scapy                      Run scapy for packet manipulation
-- force-xdp-deload               Force deload XDP programs
-```
+The high level design is shown in figure below.
+
+<img src="img/up-ebpf-xdp-high-level.svg" alt="drawing" width="500"/>
+
+The library has a component, called `PFCP Sesssion Manager`, which is a C++ API responsible to manage PFCP (Packet Forwarding Control Protocol) sessions. For each session, there is an eBPF program that represents the PFCP context in the fast path. These programs are managed by `eBPF Program Manager` component. The fast path is composed by three main function: parser, traffic classifier and traffic forwarder. The image below shows this in more detail.
+
+<img src="img/up-ebpf-xdp-high-level2.svg" alt="drawing" width="500"/>
+
+## Features
 
-## Dependencies
+As described in 3GPP TS 29.244, the Information Elements (IEs) are part of the PFCP context. The PFCP context is created by sending PFCP Session Establishment Request message. The main features supported in this project are:
 
-Upee
+Management Layer - CRUD
+- PFCP Session
+- PDR (Packet Detection Rule)
+- FAR (Forwarding Action Rule)
+
+Fast Datapath Layer
+- UDP and GTP parse
+- Traffic classification based on PDR
+- Traffic fowarding based on FAR
+
+The logical data model between PFCP Session and IEs is shown in the image below. For more detail, see 3GPP TS 29.244 version 16.5.0 Release 16.
+
+<img src="img/up-ebpf-xdp-ies.svg" alt="drawing" width="600"/>
+
+## Main Dependencies
+
+Core
 - libbpf
-- libelf
-- libz
+- bpftool
+- spdlog
 - clang >= version 3.4.0
 - llvm >= version 3.7.1
 - kernel-headers => version 5.3
-- bpftool
+- cmake >= 3.16
 
 Test
 - scapy v2.4.3
-- spdlog
 - gtest
 - sysstat
 - trex v2.86
 
+## Installation
+
+Detailed instructions on how to install, configure, and get the project running.
+This should be frequently tested to ensure reliability. Alternatively, link to
+a separate [INSTALL](INSTALL.md) document.
+
+## Configuration
+
+If the software is configurable, describe it in detail, either here or in other documentation to which you link.
+
+## Usage
+
+Show users how to use the software.
+Be specific.
+Use appropriate formatting when showing code snippets.
+Copy the keys to jump server and run `make docker-build`
+
+## How to test the software
+
+If the software includes automated tests, detail how to run those tests.
+
+
 ## Tree
 
 The directory structure was created based on this [notes](https://blogs.oracle.com/linux/notes-on-bpf-4).
@@ -71,8 +103,14 @@ The directory structure was created based on this [notes](https://blogs.oracle.c
 If you faced the problem below, create a symbolic from `libc.a -> liblibc.a`
 `No such file or directory: b'liblibc.a'`
 
-## Contact
+## Creator and Lead Developer
+
+Thiago Arruda Navarro do Amaral
+- Mail: <navarro (dot) ime (at) gmail [dot] com>
+- GitHub: [@navarrothiago](https://github.com/navarrothiago/)
+- Twitter: [@navarr0thiag0](https://twitter.com/navarr0thiag0)
+
+## References
 
-Thiago Navarro
-Email: [email protected]
-Twitter: navarr0thiag0
+- [Author M.Sc. Qualification](https://docs.google.com/presentation/d/1Q24M4Ce8TPPhiM305_Oxs0iQFmmukKwSKdlNcJ0T2uo/edit#slide=id.gc2b6cd2cb2_0_92) 
+- [Performance Evaluation with UPF eBPF/XDP Library for 5G Core Network](https://www.youtube.com/watch?v=6KYFDMJJH2o)

docker/Dockerfile

@@ -1,4 +1,5 @@
-FROM ubuntu:20.04
+ARG BASE_DEV_IMAGE=ubuntu:20.04
+FROM $BASE_DEV_IMAGE
 
 ARG UNAME=oai-spgwu
 WORKDIR /tmp/$UNAME
@@ -72,12 +73,11 @@ RUN apt-get update && \
     apt-get install  -y \
     tmux
 
-# It is comment due to ubuntu 20.04 base image.
-# If you use another one, uncomment the lines below.
-# RUN apt-get update && \
-#       apt-get -y install libssl-dev && \
-#       wget -c  https://github.com/Kitware/CMake/releases/download/v3.19.2/cmake-3.19.2.tar.gz -O - | tar -xz && \
-#       cd cmake-3.19.2 && ./bootstrap && make && make install
+# Ubuntu 20.04 already support cmake 3.19.
+RUN if [ $BASE_DEV_IMAGE != "ubuntu:20.04" ];  then apt-get update && \
+      apt-get -y install libssl-dev && \
+      wget -c  https://github.com/Kitware/CMake/releases/download/v3.19.2/cmake-3.19.2.tar.gz -O - | tar -xz && \
+      cd cmake-3.19.2 && ./bootstrap && make -j4 && make install; fi
 
 # Add your local bashrc
 ADD .bashrc /home/$USERNAME/
@@ -141,17 +141,16 @@ RUN apt-get update && \
 
 RUN pip3 install ipykernel
 RUN pip3 install matplotlib
-RUN pip3 install paramiko
 RUN pip3 install autopep8
 
 RUN apt-get update && \
     apt-get install  -y \
     rsync
 
-ARG ENV_FILENAME="env.sh"
-ADD ${ENV_FILENAME} ${ENV_FILENAME}
+# TODO: pass as ARG
+RUN echo "ENV_FILE=/workspaces/env.sh" >> /etc/environment
 
 # Omit if you want to keep the default as root.
 # USER $USERNAME
 
-CMD ${ENV_FILENAME} && /bin/bash
+CMD /bin/bash

docker/build_docker

@@ -9,6 +9,9 @@ main() {
   local -r context="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
   source "${context}"/../env.sh
   local env_file_name=env.sh
+  local base_dev_image="${1-ubuntu:20.04}"
+
+  echo "Base image "${base_dev_image}""
 
   # Copy configuration files and ssh keys to the docker context folder.
   cp "${GIT_CONFIG}" "${context}"
@@ -20,13 +23,14 @@ main() {
   cp "${context}"/../env.sh "${context}"
 
   # Build dockerfile.
-  docker build --tag="${IMAGE}":"${VERSION}" --rm -f "${context}"/"${DOCKERFILE}" "${context}" \
+  docker build --tag="${IMAGE_TAG}":"${IMAGE_VERSION}" --rm -f "${context}"/"${DOCKERFILE}" "${context}" \
                --build-arg ENV_FILENAME="${env_file_name}" \
                --build-arg DUT_SERVER_IP="${DUT_IP}" \
                --build-arg TREX_SERVER_IP="${TREX_SERVER_IP}" \
                --build-arg JUMP_SERVER_USERNAME="${JUMP_SERVER_USERNAME}" \
                --build-arg JUMP_SERVER_IP="${JUMP_SERVER_IP}" \
-               --build-arg JUMP_SERVER_PORT="${JUMP_SERVER_PORT}"
+               --build-arg JUMP_SERVER_PORT="${JUMP_SERVER_PORT}" \
+               --build-arg BASE_DEV_IMAGE="${base_dev_image}"
 
   # Remove configuration files and ssh keys from the docker context folder.
   rm "${context}"/.gitconfig
@@ -35,6 +39,10 @@ main() {
   rm "${context}"/"${SSH_CONFIG_FILE}"
   rm "${context}"/.bashrc
   rm "${context}"/env.sh
+
+  echo
+  echo "Image "${IMAGE_TAG}" was build with base image "${base_dev_image}""
+  echo 
 }
 
 main "$@"

docker/run_docker

@@ -12,7 +12,7 @@ main() {
 		--env-file "${dirname}"/../env.sh \
 		--volume "${dirname}"/../:"${WORKSPACE}" \
 		--privileged \
-		--workdir "${WORKSPACE}" "${IMAGE}":"${VERSION}" \
+		--workdir "${WORKSPACE}" "${IMAGE_TAG}":"${IMAGE_VERSION}" \
 		/bin/bash
 
   exit 0

env.sh

@@ -9,8 +9,8 @@ NUM_THREADS=4
 
 # Docker environment variable.
 USERNAME=oai-spgwu
-IMAGE=upee
-VERSION=v1.0
+IMAGE_TAG=upee
+IMAGE_VERSION=v1.0
 DOCKERFILE=Dockerfile
 SSH_FOLDER=~/.ssh
 SSH_PUBLIC_KEY_FILE=id_rsa.pub
@@ -91,4 +91,4 @@ API_HTTP_PORT=80
 # Programs name
 API_PROGRAM_NAME=api
 
-PYTHONPATH=/workspaces/tests/trex/trex_client/interactive/
+PYTHONPATH=/workspaces/tests/trex/trex_client/interactive/

src/CMakeLists.txt

@@ -64,8 +64,8 @@ install(
 
 # Headers:
 #   * ./*.h -> <prefix>/include/*.h
-# install(
-#     DIRECTORY "./"
-#     DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
-#     FILES_MATCHING PATTERN "*.h"
-# )
+install(
+    DIRECTORY "./"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+    FILES_MATCHING PATTERN "*.h"
+)

src/SessionProgramManager.h

@@ -10,7 +10,7 @@ class OnStateChangeSessionProgramObserver;
 class SessionProgram;
 
 /**
- * @brief This class is used to manager the SessionProgramManager.
+ * @brief This class is used to manager the PFCP Sesssion (eBPF bytecode) in kernel space.
  * 
  */
 class SessionProgramManager

src/programs/ProgramLifeCycle.hpp

@@ -108,8 +108,10 @@ ProgramLifeCycle<BPFSkeletonType>::ProgramLifeCycle(std::function<BPFSkeletonTyp
     , mLoadFunc(loadFunc)
     , mAttachFunc(attachFunc)
     , mDestroyFunc(destroyFunc)
+    , mpSkeleton(NULL)
 {
   LOG_FUNC();
+  // Check if the XDP is driver or skb mode.
   mFlags = Configuration::sIsSocketBufferEnabled ? XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_SKB_MODE : XDP_FLAGS_UPDATE_IF_NOEXIST;
 }
 

src/programs/UPFProgram.cpp

@@ -34,7 +34,9 @@ void UPFProgram::setup()
     throw std::runtime_error("GTP or UDP interface not defined!");
   }
 
+  LOG_DBG("Link UDP interface to interface {}", mUDPInterface.c_str())
   mpLifeCycle->link("xdp_entry_point", mUDPInterface.c_str());
+  LOG_DBG("Link GTP interface to interface {}", mGTPInterface.c_str())
   mpLifeCycle->link("xdp_entry_point", mGTPInterface.c_str());
 
 }

tests/README.md

@@ -0,0 +1,12 @@
+# Testing
+
+![setup-for-GPDU-debug-issue-2-upf-bpf](https://user-images.githubusercontent.com/42647168/86470179-4486cc80-bd11-11ea-8f55-fee848b12e11.png)
+
+- Open terminal in `Linux #0`
+- Configure veth pairs with `make config-veth-pair` in `Linux #0`
+- Install the spdlog library with `make setup`
+- Build, load and run program with `make run` in `Linux #0`
+- Login remote Scapy `ssh -X [email protected] "cd /work/mestrado/scapy/; sudo -S ./run_scapy"`
+- Generate GTP G-PDU using [Scapy](https://github.com/secdev/scapy) with `gtpu-traffic-generator.py`  in `Linux #1`
+- Open other terminal tab in `Linux #0`
+- Check logs: `sudo cat /sys/kernel/debug/tracing/trace | grep "GPDU"`  in `Linux #0`

tests/scripts/config_veth_pair

@@ -12,7 +12,7 @@ create_namespace() {
   local -r filename="${dirname}/$(basename "${BASH_SOURCE[0]}")"
 
   # TODO navarrothiago - check if it is recommend to call env.sh here.
-  source "${dirname}"/../../env.sh
+  source "${ENV_FILE}"
 
   local nr_cpu=$(nproc)
   local namespace=$1

tests/scripts/deploy_package

@@ -11,7 +11,7 @@ main() {
   local -r dirname="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
   local -r filename="${dirname}/$(basename "${BASH_SOURCE[0]}")"
 
-  source "${dirname}"/../../env.sh
+  source "${ENV_FILE}"
 
   echo
   echo "Copy package with binary and libraries."

tests/scripts/deploy_trex_config

@@ -10,7 +10,7 @@ main() {
 
   local -r dirname="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
-  source "${dirname}"/../../env.sh
+  source "${ENV_FILE}"
 
   scp -r "${LOCAL_CONFIG_DIR}" "${TREX_SERVER_SSH}":"${TREX_SERVER_UPLOAD_DIR}"
   scp -r "${LOCAL_TRAFFIC_DIR}" "${TREX_SERVER_SSH}":"${TREX_SERVER_UPLOAD_DIR}"