https://github.com/asphaltt/ping-latency-injector

Inject latency to ping on server side. BSD-3 License
https://github.com/asphaltt/ping-latency-injector

ebpf ebpf-co-re icmp ping ping-latency-injector

Last synced: about 2 months ago
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Inject latency to ping on server side. BSD-3 License

• Host: GitHub
• URL: https://github.com/asphaltt/ping-latency-injector
• Owner: Asphaltt
• License: bsd-3-clause
• Created: 2023-03-13T14:59:46.000Z (almost 2 years ago)
• Default Branch: main
• Last Pushed: 2023-03-13T15:06:53.000Z (almost 2 years ago)
• Last Synced: 2024-04-17T23:59:05.879Z (9 months ago)
• Topics: ebpf, ebpf-co-re, icmp, ping, ping-latency-injector
• Language: C
• Homepage:
• Size: 717 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# ping-latency-injector

`ping-latency-injector` is a latency injector for `ping` on server side.

On server, if it receives an ECHOREQUEST ICMPv4 packet, `ping-latency-injector` is able to

delay to reply the ECHOREPLY ICMPv4 packet.

## Goody

It's really interesting to hide the network distance on server, which is detect

by `ping`.

In hence, bad guys are unable to detect the real network distance between

servers by `ping`.

However, it's easy to calculate the real latency by subtracting the specified

injected latency.

## How it works?

It works with XDP and AF_XDP.

1. XDP program check the packet whether it's an ECHOREQUEST ICMPv4 packet.

2. XDP redirects the packet to AF_XDP.

3. AF_XDP sends the packet to user-space application.

4. After the specified latency, application transforms the packet to an

   ECHOREPLY one.

5. Application sends the transformed packets by AF_XDP.

## Build and run

```bash

# git clone [email protected]:Asphaltt/ping-latency-injector.git

# cd ping-latency-injector

# go generate && go build

# ./ping-latency-injector -h

Usage of ./ping-latency-injector:

  -D, --dev string   device to inject latency to ping

  -L, --lat string   latency to delay, 1ms <= latency <= 10s (default "1ms")

pflag: help requested

# ./ping-latency-injector -D enp0s8 -L 600ms

2023/03/12 16:01:37 Attached XDP to enp0s8

# echo On other host terminal

# ping -s 1400 -c3 192.168.1.138

PING 192.168.1.138 (192.168.1.138): 1400 data bytes

1408 bytes from 192.168.1.138: icmp_seq=0 ttl=64 time=600.888 ms

1408 bytes from 192.168.1.138: icmp_seq=1 ttl=64 time=0.661 ms  # Cancel suddenly

1408 bytes from 192.168.1.138: icmp_seq=2 ttl=64 time=0.495 ms

--- 192.168.1.138 ping statistics ---

3 packets transmitted, 3 packets received, 0.0% packet loss

round-trip min/avg/max/stddev = 0.495/200.681/600.888/282.989 ms

```

## License

BSD-3 License