Hi, can bpf_redirect_map(...) be used for interface created by VirtualBox?

[bradley-code-again]

Hi, thanks for you sharing.
I am trying with your code with two virtual machine created by VirtualBox on the same ubuntu host machine. VirtualBox created two local network vboxnet0 and vboxnet1, I trying to send data from vboxnet1 to vboxnet0 with your code, but it doesn't successfull.
The code runs to bpf_redirect_map(...), and I filled with the correct mac address of vboxnet0, but vboxnet0 always can't received any data at all.
I wondering if bpf_redirect_map(...) can be used with virtual network or not? thanks.

[kcl17]

hello @bradley-code-again
can you please share your env.sh file .
Thanks

[restart-again]

Hello @kcl17
This is my env.sh, thanks.

Docker container workspace.

WORKSPACE=/workspaces

BPF_SAMPLES_DIR="${WORKSPACE}"/build/samples
BPF_BINARY_DIR="${WORKSPACE}"/build/tests

Compilation environment variable.

NUM_THREADS=

Docker environment variable.

USERNAME=oai-spgwu
IMAGE_TAG=upee
IMAGE_VERSION=v1.0
DOCKERFILE=Dockerfile
DOCKERCOMPOSEFILE=docker-compose.yml
SSH_FOLDER=/.ssh
SSH_PUBLIC_KEY_FILE=id_rsa.pub
SSH_PRIVATE_KEY_FILE=id_rsa
SSH_CONFIG_FILE=config
GIT_CONFIG=/.gitconfig
BASH_RC=~/.bashrc

TODO navarrothiago - Remove hardcoded #24

DEVICE_IN=
DEVICE_OUT_UL=
DEVICE_OUT_DL=

TODO navarrothiago - pass as exec param.

GTP_INTERFACE=
UDP_INTERFACE=
SOCKET_BUFFER_ENABLED=0

Test environment variables.

TEST_CASE=hello_world
GTEST_FILTER_ARGS="."

Jump server.

JUMP_SERVER_NAME=
JUMP_SERVER_USERNAME=
JUMP_SERVER_IP=
JUMP_SERVER_PORT=

Trex version.

TREX_VERSION=v2.87
TREX_SHA256SUM=290c1be468335a2de2e69f217b139c9b1198732e529bfd069348d05297548b8a

Trex server configuration.

TREX_SERVER_NAME= # Warning: Optional - If you set the name, it must be configured on your ssh config.
TREX_SERVER_IP=
TREX_SERVER_ASYNC_PORT=
TREX_SERVER_SYNC_PORT=
TREX_SERVER_USERNAME=
TREX_SERVER_SSH="${TREX_SERVER_NAME}"

TREX_SERVER_SSH="${TREX_SERVER_USERNAME}"@"${TREX_SERVER_IP}"

TREX_SERVER_UPLOAD_DIR=
TREX_SERVER_DIR="${TREX_SERVER_UPLOAD_DIR}"/"${TREX_VERSION}"

Trex client configuration.

TREX_CLIENT_NAME= # Warning: Optional - If you set the name, it must be configured on your ssh config.
TREX_CLIENT_IP=
TREX_CLIENT_USERNAME=
TREX_CLIENT_SSH="${TREX_CLIENT_NAME}"

TREX_CLIENT_SSH="${TREX_CLIENT_USERNAME}"@"${TREX_CLIENT_IP}"

TREX_CLIENT_UPLOAD_DIR=
TREX_CLIENT_DIR="${TREX_CLIENT_UPLOAD_DIR}"/trex_client
TREX_CLIENT_LIB_DIR="${TREX_CLIENT_DIR}"/interactive

DUT - Device Under Test Configuration.

DUT_NAME= # Warning: Optional - If you set the name, it must be configured on your ssh config.
DUT_IP=
DUT_USERNAME=
DUT_UPLOAD_DIR=

Test local configuration.

LOCAL_CONFIG_DIR="${WORKSPACE}"/tests/trex/config
LOCAL_TRAFFIC_DIR="${WORKSPACE}"/tests/trex/traffic
LOCAL_TEST_CASES_DIR="${WORKSPACE}"/tests/trex/test_cases
LOCAL_SERVER_UPLOAD_DIR="${WORKSPACE}"/tests/trex
LOCAL_PACKAGE="${WORKSPACE}"/package

Test remote configuration

REMOTE_CONFIG_DIR="${TREX_SERVER_UPLOAD_DIR}"/config
REMOTE_TRAFFIC_DIR="${TREX_SERVER_UPLOAD_DIR}"/traffic
REMOTE_TEST_CASES_DIR="${TREX_SERVER_UPLOAD_DIR}"/test_cases

SSH port forwarding configuration

LOCAL_HTTP_SSH_PORT_FORWARDING=
LOCAL_TREX_SYNC_SSH_PORT_FORWARDING=
LOCAL_TREX_ASYNC_SSH_PORT_FORWARDING=
API_HTTP_PORT=

Programs name

API_PROGRAM_NAME=api

PYTHONPATH=/workspaces/tests/trex/trex_client/interactive/

[hrkgarg]

Hi @restart-again,

I dont see any changes in your env file from the default value. Are you able to compile and run as per the steps provided in the help section?

[navarrothiago]

@bradley-code-again, There might have some issue. Could you try to put your interface in the promiscuous and capture the packet on vboxnet0? I don't know if you have already tried that. Btw, the OAI guys are doing a great job improving this code. PTAL: https://gitlab.eurecom.fr/oai/cn5g/oai-cn5g-upf/-/tree/develop/src/upf_app

[restart-again]

@navarrothiago, many thanks for your idea and sharing. I tried with virtualbox again, it is not working. But I find it is working with a L2 link, vboxnet0 is a L3 link. I am wondering if bpf_redirect_map or bpf_redirect only works for L2 link? And in your experiment, you also configured veth somewhere, veth is also a L2 link. Is that right? thanks.

[navarrothiago]

@restart-again yes. As I recall, veth pairs was used to test locally only. See Section UTs in the README.md