jdabtieu

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <errno.h>

jdabtieu

Replication Steps

These steps will need to be done on two different machines on the same network, one as a client and another as a server.

1. VM: Install Ubuntu 24.04 on VirtualBox (other hypervisors may work but local Hyper-V won't support DPDK)
   Baremetal: on Cloudlab, follow the section on requesting resources here to acquire two nodes that have the correct hardware
2. (VM only) Configure the VM with at least 4GB RAM, 8 vCPUs, PAE/NX enabled, Nested VT-x, Nested paging, and two network adapters (both bridged, using the virtio-net driver)
3. Follow the steps here: https://github.com/microsoft/demikernel/blob/dev/doc/setup.md to build DPDK and set up Demikernel. You may need to apply this diff: https://gist.github.com/jdabtieu/0b947ae141eb82bb3188e056c1c65d8e and rebuild if an issue with RSS_HF shows up later.
4. For the configuration file: Run ip addr to grab the MAC address, IP address, and interface name. Run lspci to get the PCI ID o

jdabtieu

diff --git a/src/rust/catnip/runtime/mod.rs b/src/rust/catnip/runtime/mod.rs
index 884dec5a..86c00d5d 100644
--- a/src/rust/catnip/runtime/mod.rs
+++ b/src/rust/catnip/runtime/mod.rs
@@ -20,7 +20,7 @@ use crate::{
             rte_eth_dev_get_mtu, rte_eth_dev_info, rte_eth_dev_info_get, rte_eth_dev_is_valid_port,
             rte_eth_dev_set_mtu, rte_eth_dev_start, rte_eth_find_next_owned_by, rte_eth_link, rte_eth_link_get_nowait,
             rte_eth_promiscuous_enable, rte_eth_rss_ip, rte_eth_rx_burst,
-            rte_eth_rx_mq_mode_RTE_ETH_MQ_RX_RSS as RTE_ETH_MQ_RX_RSS, rte_eth_rx_offload_tcp_cksum,
+            rte_eth_rx_mq_mode_RTE_ETH_MQ_RX_NONE as RTE_ETH_MQ_RX_NONE, rte_eth_rx_offload_tcp_cksum,

jdabtieu

Crator

Description

I made a new website to compete against my friends to see who could write faster code. Unfortunately, I don't actually know how to write that much code. Don't tell them, but ChatGPT wrote this entire website for me. Can you solve the problems for me?

Attachments: crator.tar.gz

Commentary

jdabtieu

MemoryFS

Description

Are you sick and tired of law enforcement busting down your door, stealing your hard drives, and then finding all your pirated movies? Well, fret no more, because with MemoryFS, once those goons unplug your computer, your files are wiped!

Attachments: main.py

Commentary

jdabtieu

SimpleFileServer - idekCTF 2022

Description

All I wanted was a website letting me host files anonymously for free, for ever

Link

simple-file-server.tar.gz

jdabtieu

Engraver - Google CTF 2022

Description

You can see pictures of a robot arm laser engraver attached. Can you figure out what it is engraving?

Note: the flag should be entered all in upper case. It contains underscores but does not contain dashes.

jdabtieu

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import java.net.URLClassLoader;

public class Main {
    static void enableColor() {
        // https://stackoverflow.com/questions/52767585/how-can-you-use-vt100-escape-codes-in-java-on-windows
        try {
            // Load classes

jdabtieu

import java.io.InputStreamReader;
import java.io.IOException;
public class IO {
    static InputStreamReader br = new InputStreamReader(System.in);
    static char[] ibuf = new char[65536];
    static int iptr = 0;
    static int imax = 0;

    static int readInt() throws IOException {
        int x = 0;

jdabtieu

// IMPORTANT: Call Write(); at the end of your main function to flush the output buffer

#include <bits/stdc++.h>
#include <unistd.h>
#pragma GCC optimize ("Ofast")

int oPtr = 0;
#ifdef WIN64
char sc() {return getchar();}
void pc(char c) {putchar(c);}