Networking is associated with creating and managing networks as well as adding network connectivity to a (set of) programs.

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Dictionary synonym lookup via networking

I have a small TCP service running on port 4444 which, given a word, will look up synonyms in a dictionary. Below is my Scala code for connecting to the socket, sending the lookup command and parsing ...
6
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2answers
270 views

Parallel “wget” in Java

Purpose: write Java program that downloads a list of URLs specified on commandline in parallel (simultaneously), reporting download completion every second. My solution follows below, please point ...
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2answers
102 views

Editing /etc/network/interfaces

I am trying to change static to dhcp in the /etc/network/interfaces file and vice versa ...
3
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1answer
17 views

Implementation of *nix ipcalc

I posted a JS subnetting calc before, but I wanted to try a CLI version, so I made this. The parts I'm most worried about are: structure (could I refactor the layout better?) Did I goof any math? ...
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2answers
59 views

Mimicing a TCP connection

I've recently started a new job and been drafted on to a project that's running late. My task was initially to add Bluetooth connectivity to a C# app, but at the request of a more senior colleague ...
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1answer
46 views

Multithreading - program with lots of parallel routines (C++) [closed]

I'm coding a networking software, which has lots of functions (modules) which can be run in parallel. They share some resouces, like libnet_contexts of every type, ...
6
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1answer
157 views

Good usage of MailboxProcessor/Agent in class rather than mutable field?

I've written a simple Simple Service Discovery Protocol (SSDP) module. This module contains a class, Session that you create and then use to issue commands and ...
3
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1answer
80 views

Writing a new Finagle protocol

The following is a fairly naive implementation of a Finagle protocol that uses the scodec library for binary encoding and decoding. I'll assume something like the following SBT setup: ...
3
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2answers
50 views

Simple IPv4 and port validation for chat client

This is part of my chat client's code. It works fine but it looks messy. Any ideas? ...
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3answers
374 views

Parsing ARP cache in C

How can I make this better? ...
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29 views

“Transparently” converting the output to an e-mail message?

I recently wanted to write a regression testing script that produces a report that looks like this: ...
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84 views

Netty-based safely network reconnection

I am writing a TCP client app using netty NettyConnectionManager.scala: ...
5
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3answers
121 views

Confusing control flow

Currently, the following code runs and produces the expected and desired output. However, I'm sure that there's much wrong with it. This project queries the (flat) database, instantiates each row as ...
6
votes
1answer
108 views

Wait for messages in IMAP Gmail mailbox

I used the idle command to wait for incoming messages in my Gmail mailbox. The protocol I am using is IMAP. My concern is as follows: While the below code works, Gmail has a tendency to try to ...
4
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0answers
66 views

Decoding custom packets with Python using Twisted

This server require fast decoding of packets from clients, as I am expecting 5000 concurrent clients that is sending packets possibly every second. This is a game server (5000 players walking send ...
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3answers
1k views

Converting an IP

I've written a DNS tool in Node and would like to know if there's a better and more efficient way of handling the conversion from an IP to a long. I'm not too good at bitwise just yet and would like ...
10
votes
3answers
107 views

Dynamic library to intercept oddsock hostname lookups

Just for the fun of it, I decided I would try to create sort of an intermediate DNS system for the oddsock SOCKS proxy. With this, the domain name extension .unet is statically resolved when ...
8
votes
1answer
714 views

UDP Network server/client for gaming using boost.asio

I've designed those classes for use in a multiplayer game with possibly very high number of clients for one server. Is this implementation good, or is there something obvious I overlooked or something ...
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1answer
936 views

App for making calls to web services - AFNetworking 2.0

I've built a base class that I use a lot in my iOS app to make calls to web services. I built the base class to make the actual call and this base class is only ever used by another class. The idea ...
6
votes
4answers
155 views

Writing an interface for networking in an embedded system

I'm writing a driver in C for a WiFi module attached to a PIC18 microcontroller. I want to implement some functions that I'm familiar with in computer application level programming like Window's API ...
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0answers
145 views

Script for obtaining images from an IP security camera

I am fairly new to Python and programming in general so I hope the code in this post is not too messy. I have the following code which I use for taking images from an IP security camera: ...
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2answers
348 views

Echo server with CompletableFuture

I recently wrote a simple echo server in Java 7 using the NIO APIs so it was asynchronous and non-blocking. Then I decided, as a learning experience, to redo it with Java 8 hoping to use a more ...
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2answers
191 views

Python Port Scanner 2.1

I made lots of changes to the script presented in my previous question. I was tempted to edit that one with the new code, but it would invalidate @200_success's helpful answer. It was also ...
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1answer
106 views

Python Port Scanner 2.0

A few months ago I put up a port scanner for review. Now, I've updated it with some new Python knowledge and integraing the feedback I got. Some things I specifically think might be wrong with it or ...
5
votes
3answers
151 views

Latency problem for keyboard remoting from Android phone - follow up

I'm writing a simple remote PC app (mouse-keyboard). Android is the client and is connected with WiFi to Java PC Server. I'm using TCP but I see a bit of latency compared to other remote apps. I'm ...
6
votes
1answer
61 views

Handling packets and peers in a reliable UDP library

I am refining my reliable UDP library, its at its 3rd iteration now. It is quiet a bit multi-threaded with almost all major operations having dedicated threads. I need your opinion on the following ...
6
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1answer
223 views

Checking web-page repeatedly

I have a program that gets 5 random dice throws from random.org over and over. In order to avoid doing getaddrinfo() over and over with the exact same data, I moved ...
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1answer
75 views

Threadsafe network message

I have started making a very basic networking library in C++. It is built on UDP, with both reliable and unreliable delivery options. So far, I have made the base messaging class, so I will show the ...
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votes
3answers
4k views

Client/server implementation in C (sending data/files)

I wrote this code to send any binary file from server to client (in our example, I am sending sample_file.txt); the client should recreate the file locally. Code works fine (I tested with one or two ...
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2answers
317 views

Producer/Consumer implementation

I am using Netty embedded within Grails to process and display incoming SNMP messages. Since Netty 4 doesn't come with a built-in ChannelExecutionHandler I had to ...
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0answers
246 views

Minecraft query tools

This is my first major PHP project and I haven't gotten much feedback. I wanted to learn how to use PHP and I wanted to learn about Minecraft's status protocol, so I did what was obvious at the time. ...
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3answers
2k views

Client Sends XML, Server Parses XML, Queues Up and Executes Commands

I recently had a Java interview where I was asked to write a client-server application. I don't code primarily in Java, but with my preliminary Java knowledge, I thought I built a reasonable working ...
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3answers
767 views

How can I improve the performance of this concurrent http request loop?

I'm using the rolling curl library to fire http requests for content-length headers of images (we need to know their size to weed out placeholders and low res images). The image urls are stored in a ...
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0answers
271 views

Python urllib proxy access function - Coverage of possible proxy scenarios

Several of my Python 2.7 programs need to access server tasks via our server apache instance. The 'client' programs will run on Windows in various environments. They may be run on systems that do not ...
2
votes
1answer
54 views

Optimizing an IP generation method

I have designed a proxy server which has the feature to manage miniature separate networks. Each network has space to have up to 500 nodes or 500 IPs. The code for getting a new virtual IP is based on ...
5
votes
1answer
176 views

A simple NAT library

I've created a simple NAT library, with four essential functions: Find the UNPN device (the router in my case). Get the external IP address. Add a port forwarding entry. Delete a port forwarding ...
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1answer
344 views

TV guide program and client server with sockets

I am fairly new to Python coding, although I have been coding on and off for 30ish years. I am sure I am writing Python with too much influence from the other languages, such as REXX, VB, and some ...
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1answer
217 views

Bash script to set up an ad hoc wireless network

This script creates an adhoc network using hostapd. I have tested it and seems to work reliably. I am new to linux networking and not sure if this is a recommended way to create an adhoc network this ...
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2answers
1k views

Asynchronous networking iOS API calls

I have the code above in my iOS SDK that I am building that makes it easy for users of the SDK to make API calls. Basically, users can specify an API endpoint and easily make API calls. Is there any ...
2
votes
1answer
339 views

Find the single smallest IP network with the given IP addresses

I have a bunch of IP addresses. I want one IP network that has them all. ipaddr.collapse_address_list already exists, but that gives you a list of all the IP ...
3
votes
1answer
422 views

Object-oriented Linux networking library

I needed to perform network communications in my Linux C++ project. I thought that it was a good idea to operate on a higher level of abstraction than raw system calls. Also I love OO design. So I'm ...
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1answer
780 views

QNetworkReply network reply timeout helper

Since Qt still does not support to set timeouts on QNetworkRequest objects, I wrote this little wrapper class: ...
3
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1answer
422 views

Basic network utilisation display

I've got the following code to monitor the network usage on a network interface. I'm mainly looking for feedback on the design, but if you see any code improvements please let me know! This is also ...
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1answer
4k views

Receiving data from a network stream in c#

So was my first attempt at some network programming. I basically have a couple clients built with c#, using System.Net.Sockets TCP connections connecting to a node server backend (first project in ...
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2answers
279 views

How is this for a “Hello World” of socket programming?

I was trying out the Beej's guide to socket Programming and wrote this. Is there anything that I am obviously doing wrong? Any potential for buffer overflows? Segmentation faults? Any possible errors ...
3
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1answer
280 views

Simple IPSec/tunnel setup script

I've developed a script to set up an encrypted tunnel between two Linux hosts, using iproute2, ssh and ...
3
votes
1answer
437 views

lightweight packet sniffer review

This is a simple packet sniffer that turns on LEDs when there's network activity. It works by picking up filters in a configuration file and listen for activity in those filters. When there's a ...
5
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2answers
642 views

Better way to code download speed calcuation

I'm writing a program that downloads stuff from the internet. While the program is working fine, I want to get one critical part reviewed. I use System.Diagnostics.StopWatch object to measure the time ...
3
votes
1answer
113 views

Communication with GARMIN through WEB

I am developing a WEB based GPS system and one of its functionalities is to be able to send messages and routes to GARMIN devices. I have never been using sockets before, and for some (obvious) ...
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0answers
101 views

Haskell network connection graceful handler

Just trying to work out some simple graceful connection handling code in Haskell to get my head around some of the IO/Networking/Threading stuff, some tips where I'm doing things poorly would be ...