oskar456

CLAT for Linux using ipvlan

This proof of concept uses ipvlan feature of Linux to split up main network interface into two in order to use one in a separate namespace with jool-siit performing CLAT translation.

This way, enabling CLAT is least intrusive to the default network namespace - no need to enable forwarding or touch firewall rules.

oskar456

#!/usr/bin/env python3

import urllib.request

from collections import defaultdict

DELEGSTATS = "https://ftp.ripe.net/ripe/stats/delegated-ripencc-extended-latest"

def main():
    """

oskar456

#!/usr/bin/env python3
"""
Analyze a PCAP file containing DHCP Discover messages.
Print stats including number of unique MAC addresses,
number of MAC addresses requesting DHCP option 108
(IPv6-only Preferred) and MAC adresses flapping between
requesting and not requesting it.

To collect PCAP file, tcpdump can be used like this:

oskar456

diff --git a/src/router.c b/src/router.c
index 541c023..9ad79d4 100644
--- a/src/router.c
+++ b/src/router.c
@@ -390,6 +390,7 @@ enum {
 	IOV_RA_ROUTES,
 	IOV_RA_DNS,
 	IOV_RA_SEARCH,
+	IOV_RA_PREF64,
 	IOV_RA_ADV_INTERVAL,

oskar456

A poor man's hypervisor scripts

These scripts are written mostly in bash in order to spawn a bunch of similar KVM VMs, have each have its own SSH key for the root account (which can be e-mailed to people) and be able to destroy all the machines easily once the work is done.

There is unfortunatelly no documentation whatsover.

oskar456

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <err.h>
 

int main(int argc, char *argv[]) {

oskar456

#!/bin/bash

# Dependencies: curl, jq, realpath, date (GNU), at

API_KEY="FIXME"

claim_endpoint() {
	local regid=$1
	curl -s -H "Content-Type: application/json" \
		-H "Accept: application/json" \

oskar456

---

data_1:
  - id: 1
    key: hello
  - id: 2
    key: world

data_2:
  - id: 1

oskar456

#!/bin/sh

check_reachability() {
        local target="$1"
        local retval
        ping6 -c1 -W1 "$target" >/dev/null 2>&1
        retval="$?"
        [ "$retval" -eq 2 ] && {
                ping -c1 -W1 "$target" >/dev/null 2>&1
                retval="$?"

oskar456

#!/bin/sh

# Enable gadget mode
echo "dtoverlay=dwc2,dr_mode=peripheral" >> /boot/config.txt
systemctl enable setupgadget.service
# alternatively: ln -s /etc/systemd/system/setupgadget.service /etc/systemd/system/basic.target.wants/setupgadget.service

# Enable getty on the virtual serial line
systemctl enable serial-getty@ttyGS0.service
# alternatively: ln -s /lib/systemd/system/serial-getty@.service /etc/systemd/system/getty.target.wants/serial-getty@ttyGS0.service