{"id":13496638,"url":"https://github.com/kognise/arpchat","last_synced_at":"2025-05-15T12:07:03.067Z","repository":{"id":41381068,"uuid":"472173660","full_name":"kognise/arpchat","owner":"kognise","description":"Answering the question nobody asked: what if you wanted to text your friends using only ARP?","archived":false,"fork":false,"pushed_at":"2023-08-15T15:25:08.000Z","size":93,"stargazers_count":2524,"open_issues_count":8,"forks_count":51,"subscribers_count":18,"default_branch":"main","last_synced_at":"2025-04-14T22:20:07.447Z","etag":null,"topics":["arp","chat"],"latest_commit_sha":null,"homepage":"","language":"Rust","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"other","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/kognise.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null}},"created_at":"2022-03-21T03:29:09.000Z","updated_at":"2025-04-14T14:22:39.000Z","dependencies_parsed_at":"2024-01-15T19:44:10.023Z","dependency_job_id":"3ebcc7c8-4a15-4652-873e-537cb10a003a","html_url":"https://github.com/kognise/arpchat","commit_stats":null,"previous_names":[],"tags_count":4,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/kognise%2Farpchat","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/kognise%2Farpchat/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/kognise%2Farpchat/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/kognise%2Farpchat/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/kognise","download_url":"https://codeload.github.com/kognise/arpchat/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":254337614,"owners_count":22054254,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["arp","chat"],"created_at":"2024-07-31T19:01:53.865Z","updated_at":"2025-05-15T12:06:58.055Z","avatar_url":"https://github.com/kognise.png","language":"Rust","funding_links":[],"categories":["Rust"],"sub_categories":[],"readme":"# arpchat\n\nso... you know arp? the protocol your computer uses to find the mac addresses of other computers on your network? yeah. that.\n\ni thought it would be a great idea to hijack it to make a chat app :)\n\nbuilt in two days because i was sick and had nothing better to do.\n\n![screenshot of the tool in action](https://doggo.ninja/RJGHYH.png)\n\n## motivation\n\n1. once a year, i'm on a client isolated network that i want to chat with friends over\n2. i'm completely insane\n3. i'm a programmer\n\n(i swear, i might actually briefly have a use for this! it might not be entirely useless! ... and other lies i tell myself)\n\n## limitations\n\nyes\n\n## things i made arpchat do\n\nyou can send messages tens of thousands of characters long because i implemented a (naive) generalizable transport protocol on top of arp. there's also a bit of compression.\n\nif you wanted, you could probably split off the networking part of this and use it instead of udp. please don't do this.\n\nnot only are join and leave notifications a thing, i built an entire presence discovery and heartbeat system to see an updated list of other online users. ironically, part of this serves a similar purpose to arp itself.\n\nfor more information on how this all works technically, check out [the little article i wrote](https://kognise.dev/writing/arp).\n\n## running\n\nif you actually want to install this for some reason, you can get it from [the releases page](https://github.com/kognise/arpchat/releases/latest).\n\non windows, you probably need [npcap](https://npcap.com/#download). make sure you check \"Install Npcap in WinPcap API-compatible Mode\" in the installer!\n\non linux, you might have to give arpchat network privileges:\n\n```sh\nsudo setcap CAP_NET_RAW+ep /path/to/arpchat\n```\n\n![interface selector](https://doggo.ninja/tvFJ2A.png)\n\nthen just run the binary in a terminal. you know it's working properly if you can see your own messages when you send them. if you *can't* see your messages, try selecting a different interface or protocol!\n\nhave any issues? that really sucks. you can make an issue if it pleases you.\n\n## building\n\nyou don't really want to build this. anyway, it's tested on the latest unstable rust.\n\non windows, download the [WinPcap Developer's Pack](https://www.winpcap.org/devel.htm) and set the `LIB` environment variable to the `WpdPack/Lib/x64/` folder.\n\n```sh\ncargo build\n```\n\n![banner](https://doggo.ninja/fH9GKt.png)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkognise%2Farpchat","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fkognise%2Farpchat","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkognise%2Farpchat/lists"}