file-broadcaster's Introduction

File-Broadcaster

UDP File sender and receiver
Can use broadcast address to send file on all computers in LAN

Features

Send file to one or all computers in LAN
Reliability of data transmission
Server timeout detection
Change MTU

Overview

Requirements
Download
Installation
Script Parameters
Packets Specification
Script Specification

Download

Clone the source repository from Github.

On the command line, enter:

git clone https://github.com/gistrec/File-Broadcaster.git
git submodule init
git submodule update --recursive --remote

You can probably use Github for Windows or Github for Mac instead of the command line, however these aren't tested/supported and we only use the command line for development. Use this link to download the command line version.

Requirements

Windows:
- Visual Studio 2015 or 2017
Linux:
- g++
- pthread
- arpa

Installation

Windows
- Open FileBroadcaster.sln via Visual Studio
- Build project
Linux
- Open a terminal/console/command prompt, change to the directory where you cloned project, and type:
```
make all
```

Script Parameters

Parameter	Default	Description
p, port	33333	Sender and receiver port
f, filename	`none`	Transmitted and received file
t, type	receiver	receiver or sender
ttl	15	Seconds to wait cliend requests or sender responses
mtu	1500	MTU packet size
broadcast	255.255.255.255	Broadcast address. Can use to unicast.

Packets Specification

Packets structure

Script Specification

Sender send NEW_PACKET packet to broadcast (or unicast) address
Sender send all parts of file via TRANSFER packet
If any pacckets were lost, receiver ask them sending RESEND packet to broadcast (or unicast) address
Sender wait RESEND packets or wait TTL and turns off
Receiver ask all lost parts, until the whole file is no downloaded or wait TTL and turns off

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file-broadcaster's Issues

Shutdown receiver script after received all part

Now receiver have tho threads
When Receiver received all parts we need exit from all threads
May be need remove multi-threading architecture and create non-blocking socket

INADDR_BROADCAST don't use right broadcast address

Need check how INADDR_BROADCAST work
If IPv4 address: 192.168.100.57
And Subnet mask: 255.255.255.0
Broadcast address must be: 192.168.100.255

No work: broadcast_address.sin_addr.s_addr = INADDR_BROADCAST;
Work: broadcast_address.sin_addr.s_addr = inet_addr("192.168.100.255");
But first line must work too!