Repository: SomajitDey/ipfs-chat
Branch: main
Commit: 29237313b287
Files: 5
Total size: 112.4 KB
Directory structure:
gitextract_r71csxvd/
├── .gitattributes
├── LICENSE
├── README.md
├── ipfs-chat
└── mime.types
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FILE CONTENTS
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FILE: .gitattributes
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/ipfs-chat linguist-language=bash
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FILE: LICENSE
================================================
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
================================================
FILE: README.md
================================================
# IPFS-Chat
[](https://awesome.ipfs.io/apps/)
1. Real-time, secure, peer-to-peer messaging using [IPFS pubsub](https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#ipfs-pubsub). Allows in-chat file/directory sharing and private messaging. Works over both internet and LAN. Built-in NAT-traversal using [IPFS autorelay](https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#autorelay).
2. Very basic terminal-based UI without any eye candy.
3. The usual *Create Alias/Nick* + *Create/Join room* workflow (akin to [IRC](https://en.wikipedia.org/wiki/Internet_Relay_Chat)).
4. Fully distributed - serverless/brokerless. Peers are discovered using [DHT](https://docs.ipfs.io/concepts/dht/), [pubsub](https://docs.libp2p.io/concepts/publish-subscribe/) and [mDNS](https://en.wikipedia.org/wiki/Multicast_DNS) (See [Peer discovery](#peer-discovery)). No need for any rendezvous server. Without any central server(s), `ipfs-chat` cannot be censored/blocked easily.
5. Chat-messages are authenticated and end-to-end encrypted (See [Security](#security)). Shared files/directories are encrypted too.
6. Developed with bandwidth, CPU and disk usage efficiency in mind. Option to control shared file size (See [Usage](#usage)).
7. Written entirely in [Bash](https://www.gnu.org/software/bash/manual/bash.html); just a single shell-script. Apart from [go-ipfs](https://docs.ipfs.io/install/command-line/#official-distributions) and possibly `argon2`, depends only on standard GNU/Linux tools and tools that can be easily downloaded from the native package repository.
8. For WSL, supports sharing Windows files or folders (through direct drag-n-drop). Also allows downloading shared files in a Windows folder (See [Usage](#usage)).
9. Downloaded shared files are scanned for malicious intent (See [Security](#security) and [Usage](#usage)).
10. Auto-update enabled.
***Keywords*:** p2p; distributed; server-less; broker-less; TUI; secure; texting; file-sharing; ipfs; pubsub; privacy
## Table of Contents
[](https://github.com/SomajitDey/tocgen)
- [IPFS-Chat](#ipfs-chat)
- [Installation](#installation)
- [Download:](#download)
- [Install:](#install)
- [Usage](#usage)
- [Defaults:](#defaults)
- [Multiple-instances:](#multiple-instances)
- [Snapshot](#snapshot)
- [Testing](#testing)
- [Changing terminal window size](#changing-terminal-window-size)
- [Peer discovery](#peer-discovery)
- [Security](#security)
- [Messaging](#messaging)
- [File or directory sharing](#file-or-directory-sharing)
- [Efficiency](#efficiency)
- [Fully decentralized vs (Semi-)centralized](#fully-decentralized-vs-semi-centralized)
- [Future directions](#future-directions)
- [Contribute](#contribute)
#####
## Installation
#### Download:
```shell
git clone --depth 1 --no-tags https://github.com/SomajitDey/ipfs-chat; cd ipfs-chat
```
or,
```shell
wget https://raw.githubusercontent.com/SomajitDey/ipfs-chat/main/ipfs-chat \
&& chmod +x ./ipfs-chat
```
#### Install:
```bash
sudo mv ./ipfs-chat /usr/local/bin
```
Or, if you don't have sudo priviledge:
```bash
mkdir -p ~/.bin; mv ./ipfs-chat ~/.bin; export PATH="${PATH}:${HOME}/.bin"
# Also put the last export command inside ${HOME}/.bashrc
```
Do you want an auto-install feature, such as `./ipfs-chat -i`? If so, please [post](#contribute) a feature-request.
## Usage
```shell
ipfs-chat -r <room> -n <nick> -d <dl dir> -D <max file MB> -c <repo> -o <log> -w|-l -e
ipfs-chat -g # Generating a random room name, for when your brain can't do it
ipfs-chat -v # Version
ipfs-chat -u <version>|<branch> # Update
ipfs-chat -h # Help
```
All command-line options/flags are optional. Unobvious options are explained below.
`-c` passes the directory where `ipfs-chat` would host the IPFS node (repository); similar to the `-c` option in the `ipfs` cli. Unlike `ipfs` cli however, the environment variable `IPFS_PATH` has no effect.
`-d` passes the directory where the files received from peers would be downloaded. This can be a Windows folder (just drag-n-drop the folder in the command-line, within quotes) for WSL.
`-D` specifies the maximum size in MB for each shared file. Larger files are not downloaded/uploaded. If the specified size is negative, it implies there is no maximum size.
`-o` passes the file where the chat from the present session would be logged.
`-w` or `-W` denotes WAN-only mode. Local discovery is disabled. Everything happens over internet only. Uses WAN-DHT.
`-l` or `-L` denotes LAN-only mode. Peers are discovered only locally, no connection to the IPFS public network is formed over the internet (no bootstrap node, uses LAN-DHT). Saves resources when all chatroom peers are known to be present across LAN. Launches `ipfs-chat` faster when not connected to the internet.
`-e` enables basic MIME-type check for the shared files. Suppose a malicious peer sends you an executable file but scrupulously gives it a .txt extension. `ipfs-chat` would add a .com or .exe extension to the file then. This feature is only available as long as there is a map of MIME-types to extensions at `/etc/mime.types` (e.g. in Debian & Ubuntu). If your distribution doesn't have this map, install it at that path manually after downloading from [here](https://raw.githubusercontent.com/SomajitDey/ipfs-chat/main/mime.types).
`-u` does a manual update of `ipfs-chat`. This option is not very necessary as `ipfs-chat` auto-updates whenever there is internet connection and it is not running in LAN-only mode. `ipfs-chat -u` may be passed the version-tag (e.g. `v0.2.4`) or git-branch (e.g. `dev` or `issue-15`) to update or roll-back to. With no arguments, the update is to branch `main`, i.e. the latest release.
#### Defaults:
room: `Lobby`
nick: `${USER}`
download directory: `${HOME}/ipfs-chat-downloads`
max shared file size: -1 (i.e. unlimited)
repo: `${HOME}/.ipfs-chat`
chat log: N/A
WAN + LAN
#### Multiple-instances:
Multiple instances of `ipfs-chat` may be run for accessing different chatrooms concurrently. This may be done in 2 ways:
1. Provide a separate IPFS repository with the `-c` flag for every instance. Each instance then runs its own IPFS node independent of the others. Example:
```shell
ipfs-chat -c '/tmp/repo1' -r chatroom1 -n nick1 # In one terminal
ipfs-chat -c '/tmp/repo2' -r chatroom2 -n nick2 # In another terminal
```
2. If you are okay with using the same *nick* for every chatroom, then it is much more efficient to run the multiple instances on the same IPFS node, i.e. with the same IPFS repository. Example:
```shell
ipfs-chat [-c common-repo] -r chatroom1 -n myNick # In one terminal
ipfs-chat [-c common-repo] -r chatroom2 -n myNick # In another terminal
```
## Snapshot
## Testing
You can test `ipfs-chat` by running multiple instances on your computer. Simply use different nicknames and join the same chatroom. Example: Connect to the internet and do the following.
```shell
ipfs-chat -W -b -c '/tmp/ipfs-chat' -n 'partner' # In one terminal
ipfs-chat -b # In another terminal
```
`-b` above enables bandwidth stats. Drop it if you are not interested in those stats.
Depending on your internet speed, state of the public IPFS network (WAN-DHT) and durations for which other chatroom peers have been online, peer discovery may take a while (upto ~ 30 seconds according to my tests).
Test further. Disconnect from the internet and run the above two instances on your local machine (or two LAN-connected hosts) with the `-l` or `-L` flag.
## Changing terminal window size
Should you ever need to change the size of the terminal `ipfs-chat` is running on, you would find that it messes up the screen. Don't panic. Simply press ENTER or any of the buttons on the `ipfs-chat` screen and everything will be fixed.
## Peer discovery
Name of the room is the shared secret.
Every participant provides a (rendezvous) file at regular intervals whose content is a time-based nonce derived from the shared secret, viz. the room name. Along with this, participants publish their public (WAN) multiaddresses at a pubsub topic that is also derived from the room name.
To join the chat network, viz. the room, one needs to connect to as many online participants as possible. This is done by first querying the DHT for the providers of the rendezvous file and then swarm connecting to those peer IDs. Participants also listen to the pubsub topic where the multiaddresses are published in order to discover peers they are not directly connected to. To accommodate for peers leaving and joining the room, the query and swarm connect steps are iterated at regular intervals.
Peers behind NAT use [autorelay or p2p-circuit](https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#autorelay) to be accessible by others.
Local (LAN based) discovery is also enabled ([Discovery.MDNS.Enabled=true](https://github.com/ipfs/go-ipfs/blob/master/docs/config.md)).
Also, if a peer sees a message (over pubsub) from a peer that it is not directly connected to, it tries to connect to it immediately.
[IPNS over pubsub](https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#ipns-pubsub) is also used to speed up peer discovery. Every chatroom peer resolves the same IPNS key(s) in order to subscribe to the same name-specific topics. Because of this, some peers are already connected when the peer discovery using DHT and pubsub are launched.
During startup, the node tries to connect to the peers from the last session.
For `go-ipfs v0.10.0` onwards, a peer, once discovered, is put into the [peering subsystem](https://docs.ipfs.io/reference/cli/#ipfs-swarm-peering).
**Note**: The rendezvous nonce changes every 2 mins. Due to this, a peer might be shown to be online upto 2 mins after it goes offline.
## Security
Authenticity of the messages is established through IPNS over pubsub (See [Messaging](#messaging)).
All general messages are encrypted with a symmetric key (AES128) derived from the room name using a key-derivation-function (kdf) based on [Argon2](https://github.com/P-H-C/phc-winner-argon2).
All private messages are encrypted with a public key (ECDH/cv25519) belonging to the recipient.
All shared files and directories are encrypted (See [File sharing](#file-sharing)).
The pubsub topics are separate keys derived from the room name. Therefore, the public network, that mediates the pubsub and passes the messages along, never knows the actual room name and hence, the encryption key.
If the `-e` flag is provided, MIME-types of the shared files are checked against their extensions. This is to thwart an attacker sharing a malicious binary vested as a seemingly harmless filetype such as .doc. This check however requires a MIME types map to be present at `/etc/mime.types`. If your distribution doesn't have this map, it may be downloaded from [here](https://raw.githubusercontent.com/SomajitDey/ipfs-chat/main/mime.types).
## Messaging
Every peer publishes its nick and a self-signed PGP public key (primary-key EDDSA/ed25519 for signing + subkey ECDH/cv25519 for encryption) under its peer ID over IPNS at the start of every session. This authenticates its claim over the nick and the public key.
After discovering a peer, other peers resolve its IPNS entry and caches its nick and pubkey for use throughout the session.
For general messaging, a peer signs its message with its private key and encrypts with the aforementioned symmetric key derived from the room name. For private messaging, the message is encrypted with the recipient's public key instead. The whole encrypted object is encoded in base64 and published over pubsub along with the sender's peer ID.
Other peers receive this over pubsub, decrypt the message and verify the signature. If everything is ok, they then display the message in their UI against the sender's nick, peer ID and timestamp.
[IPNS-pubsub](https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#ipns-pubsub) is enabled to aid in resolving IPNS names as quickly as possible, and reducing the dependence on DHT.
## File or directory sharing
Directories, when shared, are first archived through `tar` and then those archives are shared like regular files.
Shared files are encrypted using their SHA1 hash and then added to IPFS. The CID of the added file and the aforementioned encrypting hash are then sent to the chatroom peer(s) in a general or private message.
The receiving peer(s) decrypt the CID and encryption hash, retrieve the encrypted file over IPFS and decrypt the same. (TBD: After decryption, receivers may check the file against the SHA1 hash received).
The purpose of encrypting a file with its own hash is to generate the same output every time the same file is encrypted. This causes deduplication. For example, if A and B encrypt and share the same file with C, C only has to download the file once. Because of the content-addressability of IPFS, deduplicated objects would also have more providers, thus increasing availability and hence improving download time.
To minimize disk usage by the downloaded and decrypted files, `git`-like content addressing is used. All downloaded and decrypted files remain saved in a global filestore, until garbage-cleaned. The download directory merely contains hard links to these files. The global filestore is GCd only when it exceeds a certain size (TBD:).
Encrypting large files is time-consuming. Files once encrypted are therefore cached in the global filestore. Also, adding large encrypted files to IPFS is time-consuming. To avoid encrypting and adding the same file again and again, as long as the IPFS node is online, for every shared file, it maintains a map of the file-hash to its encrypted file CID.
**Note**: SHA1 is preferred to other hashes merely for speed. (TBD: For added security, the SHA1 hash of the file may be salted, derived as: `cat ${file} <(echo ${salt}) | sha1sum -b | cut -d' ' -f1`. Cost: The `cat` would add significant overhead for large files).
## Efficiency
[IPFS usually consumes a lot of bandwidth](https://github.com/ipfs/go-ipfs/issues/3429). To make it more efficient, all unnecessary connections are closed at regular intervals: The node maintains a list of all chatroom peers seen or discovered in a session. All other connections, except connections to the relays that the node itself or its chatroom peers are connected to, are culled on a frequent basis.
New connections are always being formed to nodes within the general IPFS network. The interval between consecutive cullings is large enough to gather sufficient number of nodes for performing DHT operations such as providing the rendezvous file, finding other providers and finding the multiaddresses of those providers. Once these operations are finished, the culling is performed.
Connections to the chatroom peers are never closed.
To achieve this, `ipfs-chat` uses its own connection manager and does not use the [basic connection manager](https://github.com/ipfs/go-ipfs/blob/master/docs/config.md#basic-connection-manager) that ships with `go-ipfs`.
The IPFS repo is also garbage-cleaned frequently to clear any irrelevant (unpinned) blocks. Less blocks in cache means smaller *IHAVE* lists and thereby less providing to directly connected peers. Simple `ipfs repo gc` was not trustworthy as it could delete newly downloaded, unpinned blocks during shared file downloads. Instead, `ipfs-chat` runs its own garbage cleaner.
Note that the connection manager and frequent repo cleanup reduce bandwidth only at the cost of CPU.
The go-ipfs config file has been tuned to reduce resource (CPU/bandwidth/memory) consumption.
WAN-only and LAN-only modes are available (see [Usage](#usage)) to further optimize resource consumption under different situations.
To minimize disk usage wherever possible, [IPFS-filestore](https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#ipfs-filestore) is used.
For efficiency regarding file-sharing, see [File or directory sharing](#file-or-directory-sharing).
**Tip**: To show bandwidth usage by the node at the end of a session, launch `ipfs-chat` with the `-b` flag. Note that this shows the cumulative bandwidth consumption by all `ipfs-chat` instances using the same node at the same time.
## Fully decentralized vs (Semi-)centralized
Apart from its dependence on a set of of bootstrap and relay nodes, `ipfs-chat` is fully server/broker-less. As long as these bootstrap and relay nodes are public, there can be much redundancy and resilience. However, should you so need, you can always replace the public bootstrap and relay nodes with your own one(s).
## Future directions
1. Detect and block malicious peers. All direct connections to blocked peers are culled. Users can also block (and unblock later) specific nicks (regex pattern), peer IDs. While blocking, users can opt for - 1. Block permanently; 2. For present session only. **TBD**: News of this blocking (who blocked whom and when) may or may not be published over pubsub for other peers to see and decide for themselves.
2. Offline mode such that even if a peer goes offline, it can obtain the missed messages when it comes back online [This may well be beyond my capabilities]. Once [`orbit-db-cli`](https://github.com/orbitdb/orbit-db-cli) matures, it might help achieve this. Random idea: Online peers publish CIDs of time-based logs at regular intervals over pubsub. Logs are directories containing chats - one message in one file. Even if logs of two peers don't match exactly, they will have many files in common, thus achieving major deduplication and also helping availability across the ipfs-chat network.
## Contribute
Post at [issues](https://github.com/SomajitDey/ipfs-chat/issues) and [discussion](https://github.com/SomajitDey/ipfs-chat/discussions), or [write to me](mailto://hereistitan@gmail.com).
> If creating bug-reports, please provide the following:
>
> 1. Version: `ipfs-chat -v`
> 2. go-IPFS version: `ipfs --version`
> 3. Your Linux distribution
> 4. Screenshots
[](https://buymeacoffee.com/SomajitDey)
------
###### GNU GPL v3-or-later © 2021 Somajit Dey
================================================
FILE: ipfs-chat
================================================
#!/usr/bin/env bash
export LANGUAGE=C LANG=C LC_ALL=C
# Details: See info and usage functions below
export version="0.3.0 (beta)"
info(){
# Brief: Info about ipfs-chat
echo -n "
Welcome to ipfs-chat
====================
Repo (For details & Bug-report): https://github.com/SomajitDey/ipfs-chat
License: GNU GPL v3-or-later (C) 2021 Somajit Dey
Version: " >&2
echo "${version}"
}; export -f info
usage(){
# Brief: Show help and exit
echo -e "\nUsage: ipfs-chat [-n <nick>] [-r <room>] [-d <file-download-dir>] [-D <max-download-MB>] [-c <ipfs-repo-path>] [-o <chat-log-path>] [-w | -l] [-b]"
echo -e "\nNote: -w or -W implies WAN-only connection; -l|-L is LAN-only; To have both WAN & LAN, don't use any of these flags"
echo -e "\nVersion: ipfs-chat -v"
echo -e "\nUpdate: ipfs-chat -u [<version e.g. v0.2.6> | <branch-name>]"
echo -e "\nGenerate random room name: ipfs-chat -g"
echo -e "\nEnable shared file extension check against MIME-type: ipfs-chat -e"
echo ; exit 1
} >&2; export -f usage
kill_proc_tree(){
# Brief: Kill (with SIGKILL) all descendants of the process id given
local pid
for pid in $(pgrep -P "${1}"); do
kill_proc_tree "${pid}" &
done
kill -KILL "${1}"
} &>/dev/null; export -f kill_proc_tree
sha1(){
# Usage: sha1 <string> ##or## sha1 < path_to_data_file
local string="${@}"
if [[ -n "${string}" ]]; then
sha1sum <(echo -n "${string}")
else
sha1sum
fi | cut -d ' ' -f 1
} 2>/dev/null; export -f sha1
b64(){
# Brief: Inline base64 encode with / replaced by _, and the trailing = dropped
# Deleting last = because base64 encoding 160-bit kdf or hmac always gives single =, hence redundant
# Substituting / with _ because / messes up using kdf/hmac outputs as directory or filenames
# Usage: b64 <hexdump>
xxd -r -p | base64 -w0 | tr -d '=' | tr '/' '_'
} 2>/dev/null; export -f b64
hmac(){
# Usage: hmac <salt> <string>
# Output: base64, with / replaced by _, and trailing = dropped
local key="$(sha1 "${1}")" data="$(sha1 "${2}")"
echo -n "${data}" | xxd -r -p | openssl dgst -sha1 -mac hmac -macopt hexkey:"${key}" | cut -d ' ' -f 2 | b64
} 2>/dev/null; export -f hmac
kdf(){
# Usage: kdf <salt> <string>
# Output: 160-bit base64 key, with / replaced by _, and the trailing = dropped
local key="$(sha1 "${1}")" data="${2}"
# No-need to lose `data` bits by prehashing. Hashing `key` ensures argon2 salt is atleast 8 characters long.
echo -n "${data}" | argon2 "${key}" -t 3 -m 12 -p 1 -l 20 -r | b64
} 2>/dev/null; export -f kdf
dep_check(){
# Brief: Check major dependencies
local ipfs_version quit
if ipfs_version=$(ipfs version --number 2>/dev/null); then
local req_ipfs_ver=0.11.0 # Minimum ipfs-cli version required
[[ "$(echo -e "${ipfs_version}\n${req_ipfs_ver}" | sort -t. -k1,1n -k2,2n -k3,3n | head -n1)" == "${req_ipfs_ver}" ]] || \
{ echo -e "Required: go-ipfs-cli version >= ${req_ipfs_ver}\nSuggestion: ipfs update install latest\n"; quit="yes";}
else
echo -e "Required: go-ipfs-cli\nSource: https://docs.ipfs.io/install/command-line/#linux\n"
quit="yes"
fi
if ! command -v dialog &>/dev/null; then
echo -e "Required: dialog\nSource: Native package repository"
echo -e "Ref: https://command-not-found.com/dialog\n"
quit="yes"
fi
if ! command -v curl &>/dev/null; then
echo -e "Required: curl\nSource: Native package repository"
echo -e "Ref: https://command-not-found.com/curl\n"
quit="yes"
fi
if ! command -v flock &>/dev/null; then
echo -e "Required: flock\nSource: Native package repository"
echo -e "Ref: https://command-not-found.com/flock\n"
quit="yes"
fi
if ! command -v openssl &>/dev/null; then
echo -e "Required: openssl\nSource: Native package repository"
echo -e "Ref: https://command-not-found.com/openssl\n"
quit="yes"
fi
if ! command -v tput &>/dev/null; then
echo -e "Required: tput\nSource: Native package repository"
echo -e "Ref: https://command-not-found.com/tput\n"
quit="yes"
fi
if ! command -v jq &>/dev/null; then
echo -e "Required: jq\nSource: Native package repository"
echo -e "Ref: https://stedolan.github.io/jq/download/\n"
quit="yes"
fi
if ! command -v argon2 &>/dev/null; then
echo -e "Required: argon2-cli\nSource: Native package repository / web (pre-compiled binary or build from source)"
echo -e "Ref: https://command-not-found.com/argon2"
echo -e "Ref: https://github.com/SomajitDey/phc-winner-argon2/releases/download/static-build_linux_x86_64/argon2"
echo -e "Ref: https://github.com/P-H-C/phc-winner-argon2\n"
quit="yes"
fi
[[ -v quit ]] && exit 1
} >&2; export -f dep_check
dep_check
win2lin_path(){
# Brief: Convert Windows to Linux path. If Linux path is given, does tilde expansion & quote removal.
# Usage: win2lin_path <path> ##or## win2lin_path < file_containing_path
# The input can be formatted freely. Path may contain spaces not esacaped by \. Quotes may or may not be used for Win paths
local input="${@}"; [[ -n "${input}" ]] || read -r input # Backslash not special due to -r
input="${input%/}" # Trailing slash removal, if any
if ! [[ "${input}" == ~* ]]; then
local quote_less="$(echo "${input//\\/\\\\}" | xargs)" # xargs does quote removal. To save backslash, escaped 'em
wslpath "${quote_less}" && return
fi
eval echo "${input}" # eval does tilde-expansion
} 2>/dev/null; export -f win2lin_path
update(){
# Usage: update [-s <update-from-file-path>] [-d <download-to-file-path>] [git-branch]
# Note: If -d, it only downloads the latest version to the given location, doesn't update
# Note: If -s, it only updates from the given source
local OPTIND=1 opt cli_opt source dest
while getopts s:d: opt; do
case "${opt}" in
s) cli_opt="${opt}"; source="${OPTARG}";;
d) cli_opt="${opt}"; dest="${OPTARG}";;
esac
done
local branch="${!OPTIND}"
local url="https://raw.githubusercontent.com/SomajitDey/ipfs-chat/${branch:=main}/ipfs-chat"
local tmp="$(mktemp)" # Using /tmp instead of tmpdir below as tmpdir won't exist for `ipfs-chat -u`
trap "rm -f ${tmp}" return
local tags api_url="https://api.github.com/repos/SomajitDey/ipfs-chat/tags"
case "${cli_opt}" in
s)
[[ -x "${source}" ]] || return 1
mv -f "${source}" "${BASH_SOURCE}" 2>/dev/null || sudo mv -f "${source}" "${BASH_SOURCE}" && \
echo "Update: Updated to v$(${BASH_SOURCE} -v)"
;;
d)
if timeout 4 curl -sfNL -o "${tmp}" "${url}"; then
chmod +x "${tmp}" && mv "${tmp}" "${dest}" # Atomic update
elif tags="$(timeout 2 curl -sfNL "${api_url}" 2>/dev/null)"; then
echo "Error: Couldn't find the requested tag/branch"
jq -r '.[].name' <<< "${tags}" | xargs echo "Releases: "
return 1
else
echo "Error: Failed to update. Check internet connection."
return 1
fi
;;
*)
update -d "${tmp}" "${branch}" && update -s "${tmp}"
;;
esac
} >&2; export -f update
parse_cmdline(){
local opt OPTIND=1
while getopts n:r:d:D:c:gwWlLo:vbeuh opt;do
case "${opt}" in
n) nick="${OPTARG}";;
r) room="${OPTARG}";;
d) dldir="$(win2lin_path "${OPTARG}")";;
D) max_dl_MB="${OPTARG}";;
c) local repo="${OPTARG}";;
g) echo -n "Random room: " >&2; dd if=/dev/urandom count=1 bs=6 2>/dev/null | base64 | tr '/' '%'; exit;;
w|W) export connect_mode="WAN";;
l|L) export connect_mode="LAN";;
o) export chat="${OPTARG}";;
v) echo "${version}"; exit;;
b) export disable_bandwidth_metrics="false";;
e) export mime_type_check="enabled";;
u) update "${!OPTIND}"; exit "${?}";;
h|*) usage;;
esac
done
export room="${room:="Lobby"}" nick="${nick:="${USER}"}"
export dldir="${dldir:="${HOME}/ipfs-chat-downloads"}" max_dl_MB="${max_dl_MB:=-1}"
mkdir -p "${dldir}" 2>/dev/null || { echo "Error: Directory at '${dldir}' could not be created. Exiting." >&2; exit 1;}
[[ "${max_dl_MB}" =~ ^[-]?[[:digit:]]+$ ]] || { echo "Error: -D value should be an integer" >&2; exit 1;}
export IPFS_PATH="${repo:-"${HOME}/.ipfs-chat"}"
}; export -f parse_cmdline
parse_cmdline "$@"
info
echo "DL dir: $(tput smso)${dldir}$(tput rmso)" >&2
echo "Max filesize: $(tput setaf 1)$(((max_dl_MB>=0)) && echo "${max_dl_MB} MB" || echo 'N/A; Use -D flag')$(tput sgr0)" >&2
cache_peer(){
# Brief: Cache multiaddress given as argument. The cache will be used by con_cull
ipfs swarm peering add "${1}" # Add to peering subsystem (go-ipfs >= v0.10.0) # TODO: Ain't relay protected from ConnMgr?
echo "${1}" | grep -o '/p2p/[[:alnum:]]*' | grep -vf "${sess_peers}" | \
flock "${sess_peers}" xargs -r -n1 >> "${sess_peers}"
} &>/dev/null; export -f cache_peer
ipfs_config(){
# Brief: Configure IPFS node
# Note: Use random ports for everything so that multiple IPFS nodes can coexist on the same machine
# Note: Most configs below are for reducing bandwidth/CPU/disk usage
echo "Status: Configuring IPFS node..."
if [[ "$(ipfs config 'ipfs-chat-version' 2>/dev/null)" != "${version}" ]] || \
[[ "$(ipfs config 'App' 2>/dev/null)" != "ipfs-chat" ]]; then
(ipfs init --profile lowpower || ipfs config profile apply lowpower \
&& ipfs config profile apply randomports) &>/dev/null || \
{ echo "Error: Failed to create IPFS repo at ${IPFS_PATH}"; exit 1;}
ipfs config --json Pubsub.Enabled true
ipfs config --json Ipns.UsePubsub true
ipfs config Pubsub.Router gossipsub
ipfs config Ipns.RepublishPeriod 2m0s
ipfs config Ipns.RecordLifetime 24h
ipfs config Reprovider.Interval 2m0s
ipfs config Reprovider.Strategy roots
ipfs config Routing.Type dhtclient
ipfs config Swarm.ConnMgr.Type none
ipfs config --json Experimental.FilestoreEnabled true
ipfs config 'ipfs-chat-version' "${version}"
ipfs config 'App' "ipfs-chat"
fi
export sess_peers="${IPFS_PATH}/session_peers" # This file caches all ipfs-chat peers (multiaddresses) seen when node is online
local prev_sess_peers="$(cat "${sess_peers}" 2>/dev/null)" # Holds peers from last session, if any
export sess_uplds="${IPFS_PATH}/session_uploads" # Maps SHA1 hash of file to CID of its hash-encrypted object
# Repo cleanup when no other instance is running; i.e. node is offline
if ! ipfs swarm peers; then
rm -rf "${IPFS_PATH}/room#"*
rm -f "${sess_peers}" "${sess_uplds}"
ipfs pin ls --type=recursive --quiet | xargs -r -n1 -P0 ipfs pin rm # Remove stale pins to destress reprovider
fi &>/dev/null # Can't be non-blocking. Otherwise launching IPFS daemon shows, "ERROR: lock ... :someone else has lock"
export global_fs="${HOME}/.filestore-ipfs-chat"; mkdir -p "${global_fs}"
# For multinode deduplication. UL files named after SHA1, DL files after CID
# Cleanup global cache in background when disk usage exceeds 1 GB
# ICGFS: IPFS_CHAT_GLOBAL_FILESTORE_SIZE in MB (type: integer)
if (("$(du -BM "${global_fs}" | awk '{print $1}' | tr -d M)" > "${ICGFS:=1024}")); then
flock -n "${global_fs}" rm -rf "${global_fs}"/*
fi &
echo "$(tput cuu1; tput ed)Status: Preparing the IPFS config file..."
ipfs config --bool Swarm.DisableBandwidthMetrics "${disable_bandwidth_metrics:-true}"
case "${connect_mode}" in
LAN)
ipfs config profile apply local-discovery &>/dev/null # Revert changes done by Server profile
#ipfs config --bool Discovery.MDNS.Enabled true
ipfs config --json Addresses.NoAnnounce '[]'
ipfs bootstrap rm all &>/dev/null # For faster startup
# Disable NAT traversal
ipfs config --bool Swarm.DisableNatPortMap true
ipfs config --bool Swarm.Transports.Network.Relay false
ipfs config --bool Swarm.RelayClient.Enabled false
ipfs config --bool Swarm.EnableHolePunching false
;;
WAN | *)
if [[ "${connect_mode}" == WAN ]]; then
ipfs config profile apply server &>/dev/null
# Server profile disables swarm connecting to private IPs. Doesn't announce own private IPs. Disables MDNS discovery
#ipfs config --bool Discovery.MDNS.Enabled false
ipfs config show | \
jq '.Addresses.NoAnnounce += ["/ip4/127.0.0.1/ipcidr/1", "/ip6/::1/ipcidr/1"]' > "${IPFS_PATH}"/.config && \
ipfs config replace "${IPFS_PATH}"/.config
else
ipfs config profile apply local-discovery &>/dev/null # Revert changes done by Server profile
#ipfs config --bool Discovery.MDNS.Enabled true
ipfs config --json Addresses.NoAnnounce '[]'
fi
ipfs bootstrap add default &>/dev/null # For WAN-DHT
# For NAT traversal
ipfs config --bool Swarm.DisableNatPortMap false
ipfs config --bool Swarm.Transports.Network.Relay true
ipfs config --bool Swarm.RelayClient.Enabled true
ipfs config --bool Swarm.EnableHolePunching true
;;
esac
# Disable RelayService. This config is given last as server profile in WAN mode turns it on
ipfs config --bool Swarm.RelayService.Enabled false
rm -f "${IPFS_PATH}/config-pre-"* # Remove config backup files generated with `ipfs config profile apply`
echo "$(tput cuu1; tput ed)Status: Configuring ports..."
pscan(){
# Brief: Give an unused, random, local TCP port except the one passed as argument
local port except="${1}"
while port="$(( 0x"$(dd if=/dev/urandom bs=2 count=1 2> /dev/null | xxd -p)" - 1 ))";do
((port!=except)) || continue
nc -z localhost "${port}" || break
done
echo "${port}"
} 2>/dev/null; export -f pscan
local API_port="$(pscan)"; ipfs config Addresses.API "/ip4/127.0.0.1/tcp/${API_port:=5001}"
local gateway_port="$(pscan "${API_port}")"; ipfs config Addresses.Gateway "/ip4/127.0.0.1/tcp/${gateway_port:=8080}"
echo "$(tput cuu1; tput ed)Status: Getting node online (launching IPFS daemon)..."
launch_ipfs(){
# Brief: Launch IPFS daemon in the background, if not already running. Reflect online status through exit code
ipfs swarm peers || \
[[ "$(flock -s "${global_fs}" ipfs daemon ${@} | grep -iom1 'Daemon is ready' &)" ]]
} &>/dev/null; export -f launch_ipfs
if launch_ipfs ; then
echo "$(tput cuu1; tput ed)Status: IPFS node is configured"
else
echo "Error: Failed to launch IPFS daemon"; exit 1
fi 2>/dev/null
declare -rigx daemon_launch_time="${EPOCHSECONDS}"
export selfID="$(ipfs config Identity.PeerID)"; cache_peer "/p2p/${selfID}"
(# Prime the network with the peers from last session, if any
grep -v "/p2p/${selfID}" <<< "${prev_sess_peers}" | xargs -r -n1 ipfs swarm connect
# Subscribe to common topics over IPNS pubsub so that peer discovery becomes faster
ipfs name resolve --dhtt=1s "$(echo -n IPFS-Chat | ipfs add -n --pin=false -Q)" # App-specific key
ipfs bootstrap | grep -o '[[:alnum:]]*$' | xargs -r -n1 ipfs name resolve --dhtt=1s # General key
) &>/dev/null &
export topic="$(kdf "ipfs-chat" "${room}")" broadcast="$(kdf "peer-addresses" "${room}")"
} >&2; export -f ipfs_config
ipfs_config
config(){
# Brief: General config. Compute and export variables. Setup tmp dir and runtime filesystem.
if ls -d "${IPFS_PATH}/room#"* &>/dev/null; then
export nick="$(tail -n1 $(ls -d1 "${IPFS_PATH}/room#"* | head -n1)/pubkey.asc)"
echo "Note: Using ${nick} as nick" # Using separate nicks with same peer ID will cause conflicts with IPNS
fi
export enc_key="$(kdf "symmetric-encryption-key" "${room}")" tmpdir="${IPFS_PATH}/room#${topic}"
mkdir "${tmpdir}" 2>/dev/null || { echo "Error: Another instance running"; exit 1;}
tmpgen(){ mktemp "${tmpdir}/.XXXXX";}; export -f tmpgen
export chat="${chat:-"${tmpdir}/chat"}"; :>"${chat}" # Redirected no-op to clear file
export peers="${tmpdir}/peers"; :>"${peers}" # File must exist for `dialog` to show through its tailbox
export peers_buffer="${tmpdir}/peers.buffer" peers_ready="${tmpdir}/peers.ready"
export input="${tmpdir}/input" dl_lock="${tmpdir}/dl.lock"
export bg_pids="${tmpdir}/background.proc.id.list"
export code="${tmpdir}/latest_version"
[[ "${connect_mode}" != LAN ]] && update -d "${code}" &>/dev/null &
export cb_wd="${tmpdir}/chatbox.width" # Chatbox width
lwrap(){
# Brief: Line wrapping to fit our chatbox width
# Usage: lwrap [file]
# Note: If file is provided, file is folded in-place under lock. Otherwise, stdin to stdout
local file="${1}" width="$(($(flock -s "${cb_wd}" cat "${cb_wd}")-5))" # Read lock; note option -s in flock
if [[ -n "${file}" ]]; then
local buff="$(tmpgen)"
fold -s -w "${width}" "${file}" > "${buff}" && flock "${file}" mv "${buff}" "${file}" # In-place, atomic edit
else
fold -s -w "${width}"
fi
}; export -f lwrap
} >&2; export -f config
config
safe_gc(){
# Brief: Remove blocks that are not pinned. Difference with `ipfs repo gc` is that this removes only those blocks
# that are there when function is called, even if the actual cleanup takes time. Also, can check lock for added safety.
# Usage: safe_gc [<lock-file>]
# Note: Requires IPFS to be online
flock -n 3 || return 1
local lock="${1}"
if [[ -n "${lock}" ]]; then
flock -n "${lock}" ipfs refs local # This doesn't take much time
else
ipfs refs local
fi | xargs -r -n1 ipfs block rm # This is the time consuming part
} &>/dev/null 3<"${IPFS_PATH}/config"; export -f safe_gc
safe_gc & echo "${!}" >> "${bg_pids}"
identity(){
# Brief: Generate key-pair. Claim nick & pubkey using IPNS.
export GNUPGHOME="${IPFS_PATH}/gpg" pubkey="${tmpdir}/pubkey.asc" peer_kbx="${tmpdir}/peer.kbx"
gnupg(){ flock "${GNUPGHOME}" gpg --batch -q --always-trust "${@}";}; export -f gnupg # Thread-safe gpg in batch mode
if mkdir "${GNUPGHOME}"; then
gnupg --gen-key << EOF
%no-protection
Key-Type: EDDSA
Key-Curve: ed25519
Subkey-Type: ECDH
Subkey-Curve: cv25519
Name-Real: ${selfID}
Expire-Date: 0
EOF
(($? == 0)) || return 1
gnupg -a -o "${GNUPGHOME}/pubkey.asc" --export "${selfID}"
fi
cat "${GNUPGHOME}/pubkey.asc" <(echo "${nick}") > "${pubkey}"
ipfs name publish --allow-offline --ipns-base=b58mh "/ipfs/$(ipfs add -Q "${pubkey}")" & # Claim nick & pubkey using IPNS
} &>/dev/null; export -f identity
identity || { echo "Error: Failed to generate key-pair" >&2; exit 1;}
on_exit(){
# Brief: Perform these tasks on exit; called by trap
local pid
for pid in $(cat ${bg_pids}); do
kill_proc_tree "${pid}" &
done
rm -rf "${tmpdir}"
if ! ls -d ${IPFS_PATH}/room#*; then
gpgconf --kill gpg-agent
ipfs shutdown
fi
} &>/dev/null; export -f on_exit
trap "on_exit" exit
connect_peer(){
# Brief: Connect to peer ID or multiaddress provided as argument
# TODO: Simplify and economize
local input="${1}" peerID="${1##*/}" multiaddress
if [[ "${peerID}" == "${selfID}" ]]; then
return 0
elif [[ "${peerID}" != "${input}" ]]; then
multiaddress="${input}"
else
multiaddress="/p2p/${peerID}"
fi
if ipfs swarm connect "${multiaddress}"; then
# Swarm connect autochecks whether peerID is already connected. If not, only then tries multiaddress
for multiaddress in $(ipfs swarm peers | grep "${peerID}"); do
cache_peer "${multiaddress}" # Add multiaddress of both peer and any relay it is accessed through
done
else
cache_peer "/p2p/${peerID}"
return 1
fi
} &>/dev/null; export -f connect_peer
peer_pubkey_nick(){
# Brief: Import pubkey of peer ID or multiaddress passed as argument and output its nick. Flag -n to force IPNS update (nocache).
# TODO: TBD: peer_pubkey=CID_peerID
# TODO: Optimize performance / eliminate repetitions with lock. Solve sometimes peer_nick not showing
local OPTIND=1 opt nocache
getopts n opt; [[ "${opt}" == "n" ]] && nocache="--nocache"
local multiaddress="${!OPTIND}"
local peerID="${multiaddress##*/}" peer_nick
connect_peer "${multiaddress}" &
local ipfs_path="$(i=0; until ipfs name resolve ${nocache} "/ipns/${peerID}" || ((i>5));do ((i++)); done)"
[[ -n "${ipfs_path}" ]] || return 1
local peer_pubkey="${tmpdir}/${ipfs_path##*/}"
if ! [[ -e "${peer_pubkey}" ]]; then
# Check size of file before download to avoid spam. Pubkey is 669 bytes to be exact. Add some grace for nick etc.
(("$(ipfs files stat --size "${ipfs_path}" || 1001)" < 1000)) || return 1
gnupg --yes --no-default-keyring --keyring "${peer_kbx}" --delete-keys "${peerID}"
flock "${peer_pubkey}" ipfs get -o "${peer_pubkey}" "${ipfs_path}" && ipfs pin add "${ipfs_path}" && \
gnupg --no-default-keyring --keyring "${peer_kbx}" --import "${peer_pubkey}" || rm -f "${peer_pubkey}"
fi &>/dev/null
if peer_nick="$(tail -n1 "${peer_pubkey}")"; then
[[ -n "${peer_nick}" ]] || return 1 # TODO: Understand how peer_nick can ever be empty
local peer_buff="${peer_nick} @${peerID:${#peerID}-6:6}"
grep -q -m1 "${peer_buff}" "${peers}" || flock "${peers}" echo "${peer_buff}" >> "${peers}" # Live update of online-peers window
flock "${peers_buffer}" echo "${peer_buff}" >> "${peers_buffer}"
echo "${peer_buff}"
else
return 1
fi
} 2>/dev/null ; export -f peer_pubkey_nick
check_mime_type(){
# Brief: Checks if mime-type of given file matches with the file extension. If extension is unknown, let it be.
# If extension refers to different mime-type, Fail.
# Usage: check_mime_type <path> <extension>
[[ -v mime_type_check ]] || return 0
local mime_type_table="/etc/mime.types" path="${1}" ext="${2##*.}"
[[ -f "${mime_type_table}" ]] || return 0 # Perhaps this table exists only in Debian and Ubuntu
local mime_frm_ext="$(grep -m1 -w "${ext}" "${mime_type_table}" | awk '{print $1}')"
if [[ -n "${mime_frm_ext}" ]]; then
local actual_mime="$(file -ib "${path}" | cut -d ';' -f 1)" # -i or --mime is more supported than --mime-type
[[ "${actual_mime}" != "${mime_frm_ext}" ]] && [[ "${actual_mime}" =~ ^application/.*$ ]] && \
echo ".$(grep -w "${actual_mime}" "${mime_type_table}" | awk '{print $2}')"
fi
} 2>/dev/null; export check_mime_type
file_unpack(){
# Brief: Download and decrypt shared file
# Usage: file_unpack <file-hash> <IPFS-CID> <filename>
# TODO: Ask user for permission to download instead of rejecting for size>max_dl_MB
flock -s 3
local dec_hash="${1}" cid="${2}" dlpath="${dldir}/${3}"
local cache="${global_fs}/${cid}"
if ! [[ -f "${cache}" ]]; then
((max_dl_MB < 0)) || (($(ipfs files stat --size /ipfs/"${cid}") < max_dl_MB*1024*1024)) || return 1
local buffer="$(tmpgen)"
ipfs cat "${cid}" | openssl enc -aes128 -pass pass:"${dec_hash}" -nosalt -a -A -d -out "${buffer}" && \
mv "${buffer}" "${cache}" && ipfs pin add "${cid}"
fi
local mime_ext="$(check_mime_type "${cache}" "${dlpath}")"
ln --backup=numbered "${cache}" "${dlpath}${mime_ext}" || \
cp --backup=numbered "${cache}" "${dlpath}${mime_ext}"
} &>/dev/null 3>"${dl_lock}"; export -f file_unpack
subscriber_daemon(){
# Brief: Listen to messages at pubsub, decrypt & verify signature, display if ok
# TODO: Malicious peer detection and blocking.
local timestamp CID peerID readbuff recipID sender buffer="$(tmpgen)" gpg_stderr="$(tmpgen)" prefix
while read -r peerID readbuff recipID;do
(sender="$(peer_pubkey_nick "${peerID}")" || exit 1 # Note absence of -n flag in peer_pubkey_nick
case "${recipID}" in
all)
prefix="$(printf '=%.0s' {1..40})"$'\n'
gnupg --keyring "${peer_kbx}" --passphrase "${enc_key}" --pinentry-mode loopback -d
;;
"${selfID}")
prefix='**************Private message***********'$'\n'
gnupg --keyring "${peer_kbx}" -d
;;
*) exit 1;;
esac < <(echo -n "${readbuff}" | base64 -d) > "${buffer}" 2> "${gpg_stderr}" || exit 1
grep -iq "Good signature from \"${peerID}\"" "${gpg_stderr}" || exit 1 # Verify authenticity/signature
grep -xq '[[:print:]]*' "${buffer}" || exit 1 # Check msg is text only to avoid spam
read timestamp dec_hash CID < <(head -n1 "${buffer}" | grep -xE '[[:digit:]]*[[:blank:]]([[:alnum:]+_]*[[:blank:]][[:alnum:]]*)?')
timestamp="$(date -d @${timestamp} +"%a %H:%M:%S")" || exit 1
prefix="${prefix}${sender} ${timestamp} -- "
flock "${chat}" cat <(echo -n "${prefix}") <(tail -n+2 "${buffer}") <(echo -e \\n) | lwrap >> "${chat}"
if [[ -n "${dec_hash}" ]]; then
[[ "${peerID}" != "${selfID}" ]] || [[ "${recipID}" == "${selfID}" ]] || exit 1
eval filename="$(awk NR==2 "${buffer}" | cut -d ' ' -f 3-)" # eval is for quote removal
file_unpack "${dec_hash}" "${CID}" "${filename}" || \
flock "${chat}" echo -e "Download failed -- ${filename}\n" | lwrap >> "${chat}"
fi
)&
done < <(ipfs pubsub sub "${topic}" | grep --line-buffered -x '[[:alnum:]]*[[:blank:]][[:alnum:]+/=]*[[:blank:]][[:alnum:]]*')
} &>"${tmpdir}/subscriber_daemon.log"; export -f subscriber_daemon
subscriber_daemon & echo "${!}" >> "${bg_pids}"
pubsub_conn(){
# Brief: Connect to multiaddresses that are broadcast over pubsub
# TODO: Economize same peerID multiple multiaddress
local multiaddress peerID
while read -r multiaddress;do
peerID="${multiaddress##*/}"
[[ "${peerID}" == "${selfID}" ]] || peer_pubkey_nick "${multiaddress}" # TODO: TBD: & (bg) or not?
done < <(ipfs pubsub sub "${broadcast}" | grep --line-buffered -x '[[:alnum:]/.:-]*')
} &>"${tmpdir}/pubsub_conn.log"; export -f pubsub_conn
echo "Status: Launching peer-discovery over pubsub..." >&2; pubsub_conn & echo "${!}" >> "${bg_pids}"
con_cull(){
# Brief: Cull all connections except those in the cache, and the connection to relay (if any)
# Purpose: Reducing bandwidth usage by killing all irrelevant connections
local own_relay="$(ipfs id "${selfID}" -f="<addrs>\n" | grep -o '/p2p/[[:alnum:]]*' | sort -u)"
ipfs swarm peers | grep -o '/p2p/[[:alnum:]]*' | grep -vf "${sess_peers}" | grep -vf <(echo "${own_relay}") | \
xargs -r -n1 ipfs swarm disconnect
} &>/dev/null; export -f con_cull
declare -irx ICPDI="${ICPDI:=30}" # IPFS_CHAT_PEER_DISCOVERY_INTERVAL in seconds (type: integer)
peering_daemon(){
# Brief: Discover & connect to chat-peers & announce self for others to discover - at regular intervals
local peerID
local -a dht_ops_pid
local -A peerID_list # Associative array
local -r start_peer_discov="${EPOCHSECONDS}"
while :;do
dht_ops_pid=() # Stores pid's of background DHT operations executing in the current pass
local timestamp="${EPOCHSECONDS}" # Current Unix time
local nonce="$(hmac "${broadcast}" "$((timestamp/120))" | ipfs add -Q --stdin-name='Rendezvous')" # Announce time based nonce
#ipfs dht provide "${nonce}" & dht_ops_pid+=($!) # TODO: TBD: Isnt `ipfs add` enough? `ipfs dht provide` takes loooong time
peerID_list=() # Would store peerIDs seen in this pass
while read -r -t 5 peerID; do # Connecting to peers and importing their latest pubkeys. Exp: No timeout messes things up
((peerID_list["${peerID}"] != 1)) || continue # peerID handled already, so move on
peerID_list["${peerID}"]=1 # Add to list so that other iterations won't handle this peerID again
peer_pubkey_nick -n "${peerID}" &>/dev/null & dht_ops_pid+=($!) # Notice the nocache flag -n forcing IPNS update
done < <(cat <(ipfs pubsub peers "${topic}") <(ipfs pubsub peers "${broadcast}") <(timeout 5.5 ipfs dht findprovs "${nonce}"))
# Makes things concurrent. Note: Without the `ipfs dht` timeout, `ps` would be replete with older `cat` and `ipfs dht`
[[ -n "${dht_ops_pid}" ]] && wait "${dht_ops_pid[@]}" # Wait till all DHT operations are complete
ipfs id "${selfID}" -f="<addrs>\n" | grep -vf <(ipfs diag sys | jq -r .net.interface_addresses[]) | \
ipfs pubsub pub "${broadcast}" # Announce own public multiaddresses over pubsub
ipfs pin rm "${nonce}" &>/dev/null & # Otherwise reprovider will continue announcing stale nonce. Pin still necessary to save from auto-GC
flock "${peers_buffer}" sort -uo "${peers_buffer}" "${peers_buffer}" && mv "${peers_buffer}" "${peers_ready}" # In-place sort followed by atomic move. -u defends against peers_buffer containing repetitions
if ((EPOCHSECONDS-start_peer_discov > 30)); then
con_cull & # Need for DHT is over for now. So, let's cull unnecessary connections to reduce bandwidth usage.
safe_gc "${dl_lock}" & # Remove irrelevant blocks in bg
# Lockfile makes sure this is not run during file download, as otherwise downloaded but yet unpinned blocks might be GCd
sleep "$((ICPDI-EPOCHSECONDS+timestamp))" 2>/dev/null # Redirection for when the sleep time is negative
else
continue # For the initial 30s after launch be relentless in peer discovery. No culling, no GC.
fi
done
} &>"${tmpdir}/peering_daemon.log"; export -f peering_daemon
echo "Status: Launching peer-discovery over DHT..." >&2; peering_daemon & echo "${!}" >> "${bg_pids}"
file_pack(){
# Brief: Encrypt file with its salted hash, add to IPFS & output CID and encrypt key
# Usage: file_pack <file containing the path of the file to be shared> # This is just for simplicity of `send` code below
# This function also replaces the path present in the given file with just the filename
local msg="${1}" path filename
path="$(win2lin_path < "${msg}")"
if [[ -f "${path}" ]]; then
filename="${path##*/}"
elif [[ -d "${path}" ]]; then
local dir="${path}"; path="$(tmpgen)"
local dirname="${dir##*/}"
(cd "${dir}"/.. ; tar -czf "${path}" "${dirname}") # This trick makes sure tar -xzf gives only the desired directory, not its parents
filename="${dirname}.tar.gz"
else
return 0
fi
local enc_hash="$(sha1sum -b "${path}" | cut -d' ' -f1 | b64)"
if ! grep -m1 "${enc_hash}" "${sess_uplds}"; then
local cache="${global_fs}/${enc_hash}"
[[ -f "${cache}" ]] || openssl enc -aes128 -pass pass:"${enc_hash}" -nosalt -a -A -in "${path}" -out "${cache}"
local hlink="$(tmpgen)"; ln -f "${cache}" "${hlink}"
# This is necessary for ipfs add --nocopy below; otherwise ipfs add fails if cache is outside "${IPFS_PATH}/.."
((max_dl_MB < 0)) || (("$(wc -c "${hlink}" | cut -d ' ' -f1)" < max_dl_MB*1024*1024)) || return 1
echo "${enc_hash} $(ipfs add --nocopy --fscache -Q "${hlink}")" | flock "${sess_uplds}" tee -a "${sess_uplds}"
fi
# Openssl with -nosalt instead of GPG, because GPG or Openssl -salt encryption is time dependent
echo -n "Sent file: \"${filename}\"" > "${msg}"
} 2>/dev/null; export -f file_pack
send(){
# Brief: Encrypt and sign user's msg & publish to pubsub
[[ -s "${input}" ]] || return # Skip empty input
local msg="$(tmpgen)" recipID="all"
local first_word="$(cut -z -d ' ' -f 1 "${input}")"
if [[ "${first_word}" =~ ^@[[:alnum:]]{6}$ ]]; then
recipID="$(grep -Eom1 "[[:alnum:]]*${first_word/@/}$" "${sess_peers}")"
cut -d ' ' -f 2- "${input}" | tr -d $'\n' > "${msg}"
grep -xq "${first_word}" "${msg}" && return # Skip empty input
local prefix="PM to $(grep -m1 "${first_word}" "${peers}") $(date +"%a %H:%M:%S") -- "
else
mv "${input}" "${msg}"
fi
(
if enc_hash_cid="$(file_pack "${msg}")"; then
buffer="$(cat <(echo "${EPOCHSECONDS} ${enc_hash_cid}") "${msg}" | \
case "${recipID}" in
all) gnupg --passphrase "${enc_key}" --pinentry-mode loopback -s -c --cipher-algo AES128;;
*) peer_pubkey_nick "${recipID}" >/dev/null ; gnupg --keyring "${peer_kbx}" -s -r "${recipID}" -e;;
esac | base64 -w0)"
ipfs pubsub pub "${topic}" <<< "${selfID} ${buffer} ${recipID}"
else
prefix="Failed to send -- "
fi
[[ -v prefix ]] && flock "${chat}" cat <(echo -n "${prefix}") "${msg}" <(echo -e \\n) | lwrap >> "${chat}"
) &
} &>/dev/null; export -f send
ui(){
# Brief: UI event-loop. Window numbering: 1(Top Left) 2(Top Right) 3(Spanning Bottom)
local PM_buffer="$(tmpgen)" txt_buffer="$(tmpgen)"
local input_help="\Zb\Z4Nick: \Zu\Z0${nick}\Zn \Zb\Z4peerID: \Zu\Z0@${selfID:${#selfID}-6:6}\Zn
\Zb\Z4General-Message:\Z1 Type, then \Z4Send\Z1 (or press \Z4Enter\Z1)\Zn
\Zb\Z4Fle-sharing:\Z2 Drag-n-drop file/directory, or use \Z4Explorer\Zn
\Zb\Z4Private-Message:\Z5 Select peer using \Z4PM\Z5, then type and \Z4Send\Zn"
local chat_title="Room: ${room}"
local peers_title="Online-peers"
local peering_mode="\Zb\Z4${connect_mode:-"WAN+LAN"}\Zn"
while :;do
# Dimensions are computed just before calling `dialog` to accomodate for the latest terminal window size changes
local tty_height="$(tput lines)" tty_width="$(tput cols)"
local win3_height=10 win3_width="${tty_width}"
local win12_height="$((tty_height-win3_height-1))" # The -1 gap looks awesome as it demarcates better
local win2_width="$((tty_width/4))"
local win1_width="$((tty_width-win2_width))"
if ((win1_width != last_win1_width)); then
flock -x "${cb_wd}" echo "${win1_width}" > "${cb_wd}" # Write lock; note option -x in flock
lwrap "${chat}"
local last_win1_width="${win1_width}"
fi # Conditionality decreases lag between pressing Send and subsequent chatbox update
DIALOG_CANCEL=4 dialog --keep-tite \
--title "${chat_title}" --begin 0 0 --tailboxbg "${chat}" "${win12_height}" "${win1_width}" \
--and-widget --colors --hline "${peering_mode}" \
--title "${peers_title}" --begin 0 "${win1_width}" --tailboxbg "${peers}" "${win12_height}" "${win2_width}" \
--and-widget --colors \
--no-shadow --title "Press Esc to exit" --begin "$((tty_height-win3_height))" 0 \
--ok-label "Send" --cancel-label "Explorer" \
--extra-button --extra-label "Chat" \
--help-button --help-label "PM" \
--inputbox "${input_help}" "${win3_height}" "${win3_width}" "$(cat "${PM_buffer}" "${txt_buffer}")" \
2> "${input}"
local exit_code=$?
mv -f "${peers_ready}" "${peers}" &>/dev/null # Refresh online-peers
case "${exit_code}" in
0) # Button: Send
send
: > "${PM_buffer}"; : > "${txt_buffer}"
;;
2) # Button: PM
sed -E s/^@[[:alnum:]]{6}[[:blank:]]?// "${input}" > "${txt_buffer}" # Put anything except recipID in buffer
dialog --keep-tite --no-shadow --colors --hline "${peering_mode}" --exit-label "Back" --ok-label "Select" \
--title "${peers_title}" --begin 0 0 --menu "Choose peer" "${tty_height}" "${tty_width}" "${tty_height}" \
$(awk '{print $2,$1}' "${peers}") 2> "${PM_buffer}" && echo -n ' ' >> "${PM_buffer}"
;;
3) # Button: Chat
dialog --keep-tite --no-shadow --scrollbar --exit-label "Back" \
--title "${chat_title}" --begin 0 0 --textbox "${chat}" "${tty_height}" "${tty_width}"
: > "${PM_buffer}"; : > "${txt_buffer}"
;;
4) # Button: Explorer
dialog --keep-tite --colors --begin 0 0 \
--title "Help: \Z1Tab\Zn for choosing window; \Z1Spacebar\Zn for autocomplete or select/copy" \
--fselect "${PWD}/" "${win12_height}" "${tty_width}" 2> "${txt_buffer}"
;;
1 | *) # Ctrl-C or Esc
local confirm_quit="Shared file download is in progress. Still wanna quit?"
if ! flock -n "${dl_lock}" -c : ; then
# Check if dl_lock is held by file_unpack or safe_gc. In the latter case, return without prompt.
if flock -s "${dl_lock}" -c : ; then
# Read lock could be acquired, hence it must be file_unpack that's holding dl_lock
dialog --keep-tite --yesno "${confirm_quit}" "$(tput lines)" "$(tput cols)" && return "${exit_code}"
else
return "${exit_code}" # Lock held by safe_gc
fi
else
return "${exit_code}"
fi
;;
esac
done
}; export -f ui
echo "Status: Launching UI...(If it takes a long time to open, try pressing Enter)" >&2; ui
[[ -v disable_bandwidth_metrics ]] && \
echo -e "Stats: $(ipfs stats bw | head -n3)\nTime: $((EPOCHSECONDS-daemon_launch_time))s" >&2
if [[ -x "${code}" ]] && updateto="$(${code} -v 2>/dev/null)" && [[ "${updateto}" != "${version}" ]]; then
confirm_update="Update ipfs-chat from v${version} to v${updateto}?"
dialog --keep-tite --yesno "${confirm_update}" "$(tput lines)" "$(tput cols)" && update -s "${code}"
fi
echo "Status: Exiting..." >&2
exit
================================================
FILE: mime.types
================================================
###############################################################################
#
# MIME media types and the extensions that represent them.
#
# The format of this file is a media type on the left and zero or more
# filename extensions on the right. Programs using this file will map
# files ending with those extensions to the associated type.
#
# This file is part of the "mime-support" package. Please report a bug using
# the "reportbug" command of the "reportbug" package if you would like new
# types or extensions to be added.
#
# The reason that all types are managed by the mime-support package instead
# allowing individual packages to install types in much the same way as they
# add entries in to the mailcap file is so these types can be referenced by
# other programs (such as a web server) even if the specific support package
# for that type is not installed.
#
# Users can add their own types if they wish by creating a ".mime.types"
# file in their home directory. Definitions included there will take
# precedence over those listed here.
#
###############################################################################
application/activemessage
application/andrew-inset ez
application/annodex anx
application/applefile
application/atom+xml atom
application/atomcat+xml atomcat
application/atomicmail
application/atomserv+xml atomsrv
application/batch-SMTP
application/bbolin lin
application/beep+xml
application/cals-1840
application/commonground
application/cu-seeme cu
application/cybercash
application/davmount+xml davmount
application/dca-rft
application/dec-dx
application/dicom dcm
application/docbook+xml
application/dsptype tsp
application/dvcs
application/ecmascript es
application/edi-consent
application/edi-x12
application/edifact
application/epub+zip epub
application/eshop
application/font-sfnt otf ttf
application/font-tdpfr pfr
application/font-woff woff
application/futuresplash spl
application/ghostview
application/gzip gz
application/hta hta
application/http
application/hyperstudio
application/iges
application/index
application/index.cmd
application/index.obj
application/index.response
application/index.vnd
application/iotp
application/ipp
application/isup
application/java-archive jar
application/java-serialized-object ser
application/java-vm class
application/javascript js mjs
application/json json
application/ld+json jsonld
application/m3g m3g
application/mac-binhex40 hqx
application/mac-compactpro cpt
application/macwriteii
application/marc
application/mathematica nb nbp
application/mbox mbox
application/ms-tnef
application/msaccess mdb
application/msword doc dot
application/mxf mxf
application/news-message-id
application/news-transmission
application/ocsp-request
application/ocsp-response
application/octet-stream bin deploy msu msp
application/oda oda
application/oebps-package+xml opf
application/ogg ogx
application/onenote one onetoc2 onetmp onepkg
application/parityfec
application/pdf pdf
application/pgp-encrypted pgp
application/pgp-keys key
application/pgp-signature sig
application/pics-rules prf
application/pkcs10
application/pkcs7-mime
application/pkcs7-signature
application/pkix-cert
application/pkix-crl
application/pkixcmp
application/postscript ps ai eps epsi epsf eps2 eps3
application/prs.alvestrand.titrax-sheet
application/prs.cww
application/prs.nprend
application/qsig
application/rar rar
application/rdf+xml rdf
application/remote-printing
application/riscos
application/rtf rtf
application/sdp
application/set-payment
application/set-payment-initiation
application/set-registration
application/set-registration-initiation
application/sgml
application/sgml-open-catalog
application/sieve
application/sla stl
application/slate
application/smil+xml smi smil
application/timestamp-query
application/timestamp-reply
application/vemmi
application/wasm wasm
application/whoispp-query
application/whoispp-response
application/wita
application/x400-bp
application/xhtml+xml xhtml xht
application/xml xml xsd
application/xml-dtd
application/xml-external-parsed-entity
application/xslt+xml xsl xslt
application/xspf+xml xspf
application/zip zip
application/vnd.3M.Post-it-Notes
application/vnd.accpac.simply.aso
application/vnd.accpac.simply.imp
application/vnd.acucobol
application/vnd.aether.imp
application/vnd.android.package-archive apk
application/vnd.anser-web-certificate-issue-initiation
application/vnd.anser-web-funds-transfer-initiation
application/vnd.audiograph
application/vnd.bmi
application/vnd.businessobjects
application/vnd.canon-cpdl
application/vnd.canon-lips
application/vnd.cinderella cdy
application/vnd.claymore
application/vnd.commerce-battelle
application/vnd.commonspace
application/vnd.comsocaller
application/vnd.contact.cmsg
application/vnd.cosmocaller
application/vnd.ctc-posml
application/vnd.cups-postscript
application/vnd.cups-raster
application/vnd.cups-raw
application/vnd.cybank
application/vnd.debian.binary-package deb ddeb udeb
application/vnd.dna
application/vnd.dpgraph
application/vnd.dxr
application/vnd.ecdis-update
application/vnd.ecowin.chart
application/vnd.ecowin.filerequest
application/vnd.ecowin.fileupdate
application/vnd.ecowin.series
application/vnd.ecowin.seriesrequest
application/vnd.ecowin.seriesupdate
application/vnd.enliven
application/vnd.epson.esf
application/vnd.epson.msf
application/vnd.epson.quickanime
application/vnd.epson.salt
application/vnd.epson.ssf
application/vnd.ericsson.quickcall
application/vnd.eudora.data
application/vnd.fdf
application/vnd.ffsns
application/vnd.flographit
application/vnd.font-fontforge-sfd sfd
application/vnd.framemaker
application/vnd.fsc.weblaunch
application/vnd.fujitsu.oasys
application/vnd.fujitsu.oasys2
application/vnd.fujitsu.oasys3
application/vnd.fujitsu.oasysgp
application/vnd.fujitsu.oasysprs
application/vnd.fujixerox.ddd
application/vnd.fujixerox.docuworks
application/vnd.fujixerox.docuworks.binder
application/vnd.fut-misnet
application/vnd.google-earth.kml+xml kml
application/vnd.google-earth.kmz kmz
application/vnd.grafeq
application/vnd.groove-account
application/vnd.groove-identity-message
application/vnd.groove-injector
application/vnd.groove-tool-message
application/vnd.groove-tool-template
application/vnd.groove-vcard
application/vnd.hhe.lesson-player
application/vnd.hp-HPGL
application/vnd.hp-PCL
application/vnd.hp-PCLXL
application/vnd.hp-hpid
application/vnd.hp-hps
application/vnd.httphone
application/vnd.hzn-3d-crossword
application/vnd.ibm.MiniPay
application/vnd.ibm.afplinedata
application/vnd.ibm.modcap
application/vnd.informix-visionary
application/vnd.intercon.formnet
application/vnd.intertrust.digibox
application/vnd.intertrust.nncp
application/vnd.intu.qbo
application/vnd.intu.qfx
application/vnd.irepository.package+xml
application/vnd.is-xpr
application/vnd.japannet-directory-service
application/vnd.japannet-jpnstore-wakeup
application/vnd.japannet-payment-wakeup
application/vnd.japannet-registration
application/vnd.japannet-registration-wakeup
application/vnd.japannet-setstore-wakeup
application/vnd.japannet-verification
application/vnd.japannet-verification-wakeup
application/vnd.koan
application/vnd.lotus-1-2-3
application/vnd.lotus-approach
application/vnd.lotus-freelance
application/vnd.lotus-notes
application/vnd.lotus-organizer
application/vnd.lotus-screencam
application/vnd.lotus-wordpro
application/vnd.mcd
application/vnd.mediastation.cdkey
application/vnd.meridian-slingshot
application/vnd.mif
application/vnd.minisoft-hp3000-save
application/vnd.mitsubishi.misty-guard.trustweb
application/vnd.mobius.daf
application/vnd.mobius.dis
application/vnd.mobius.msl
application/vnd.mobius.plc
application/vnd.mobius.txf
application/vnd.motorola.flexsuite
application/vnd.motorola.flexsuite.adsi
application/vnd.motorola.flexsuite.fis
application/vnd.motorola.flexsuite.gotap
application/vnd.motorola.flexsuite.kmr
application/vnd.motorola.flexsuite.ttc
application/vnd.motorola.flexsuite.wem
application/vnd.mozilla.xul+xml xul
application/vnd.ms-artgalry
application/vnd.ms-asf
application/vnd.ms-excel xls xlb xlt
application/vnd.ms-excel.addin.macroEnabled.12 xlam
application/vnd.ms-excel.sheet.binary.macroEnabled.12 xlsb
application/vnd.ms-excel.sheet.macroEnabled.12 xlsm
application/vnd.ms-excel.template.macroEnabled.12 xltm
application/vnd.ms-fontobject eot
application/vnd.ms-lrm
application/vnd.ms-officetheme thmx
application/vnd.ms-pki.seccat cat
#application/vnd.ms-pki.stl stl
application/vnd.ms-powerpoint ppt pps
application/vnd.ms-powerpoint.addin.macroEnabled.12 ppam
application/vnd.ms-powerpoint.presentation.macroEnabled.12 pptm
application/vnd.ms-powerpoint.slide.macroEnabled.12 sldm
application/vnd.ms-powerpoint.slideshow.macroEnabled.12 ppsm
application/vnd.ms-powerpoint.template.macroEnabled.12 potm
application/vnd.ms-project
application/vnd.ms-tnef
application/vnd.ms-word.document.macroEnabled.12 docm
application/vnd.ms-word.template.macroEnabled.12 dotm
application/vnd.ms-works
application/vnd.mseq
application/vnd.msign
application/vnd.music-niff
application/vnd.musician
application/vnd.netfpx
application/vnd.noblenet-directory
application/vnd.noblenet-sealer
application/vnd.noblenet-web
application/vnd.novadigm.EDM
application/vnd.novadigm.EDX
application/vnd.novadigm.EXT
application/vnd.oasis.opendocument.chart odc
application/vnd.oasis.opendocument.database odb
application/vnd.oasis.opendocument.formula odf
application/vnd.oasis.opendocument.graphics odg
application/vnd.oasis.opendocument.graphics-template otg
application/vnd.oasis.opendocument.image odi
application/vnd.oasis.opendocument.presentation odp
application/vnd.oasis.opendocument.presentation-template otp
application/vnd.oasis.opendocument.spreadsheet ods
application/vnd.oasis.opendocument.spreadsheet-template ots
application/vnd.oasis.opendocument.text odt
application/vnd.oasis.opendocument.text-master odm
application/vnd.oasis.opendocument.text-template ott
application/vnd.oasis.opendocument.text-web oth
application/vnd.openxmlformats-officedocument.presentationml.presentation pptx
application/vnd.openxmlformats-officedocument.presentationml.slide sldx
application/vnd.openxmlformats-officedocument.presentationml.slideshow ppsx
application/vnd.openxmlformats-officedocument.presentationml.template potx
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet xlsx
application/vnd.openxmlformats-officedocument.spreadsheetml.template xltx
application/vnd.openxmlformats-officedocument.wordprocessingml.document docx
application/vnd.openxmlformats-officedocument.wordprocessingml.template dotx
application/vnd.osa.netdeploy
application/vnd.palm
application/vnd.pg.format
application/vnd.pg.osasli
application/vnd.powerbuilder6
application/vnd.powerbuilder6-s
application/vnd.powerbuilder7
application/vnd.powerbuilder7-s
application/vnd.powerbuilder75
application/vnd.powerbuilder75-s
application/vnd.previewsystems.box
application/vnd.publishare-delta-tree
application/vnd.pvi.ptid1
application/vnd.pwg-xhtml-print+xml
application/vnd.rapid
application/vnd.rim.cod cod
application/vnd.s3sms
application/vnd.seemail
application/vnd.shana.informed.formdata
application/vnd.shana.informed.formtemplate
application/vnd.shana.informed.interchange
application/vnd.shana.informed.package
application/vnd.smaf mmf
application/vnd.sss-cod
application/vnd.sss-dtf
application/vnd.sss-ntf
application/vnd.stardivision.calc sdc
application/vnd.stardivision.chart sds
application/vnd.stardivision.draw sda
application/vnd.stardivision.impress sdd
application/vnd.stardivision.math sdf
application/vnd.stardivision.writer sdw
application/vnd.stardivision.writer-global sgl
application/vnd.street-stream
application/vnd.sun.xml.calc sxc
application/vnd.sun.xml.calc.template stc
application/vnd.sun.xml.draw sxd
application/vnd.sun.xml.draw.template std
application/vnd.sun.xml.impress sxi
application/vnd.sun.xml.impress.template sti
application/vnd.sun.xml.math sxm
application/vnd.sun.xml.writer sxw
application/vnd.sun.xml.writer.global sxg
application/vnd.sun.xml.writer.template stw
application/vnd.svd
application/vnd.swiftview-ics
application/vnd.symbian.install sis
application/vnd.tcpdump.pcap cap pcap
application/vnd.triscape.mxs
application/vnd.trueapp
application/vnd.truedoc
application/vnd.tve-trigger
application/vnd.ufdl
application/vnd.uplanet.alert
application/vnd.uplanet.alert-wbxml
application/vnd.uplanet.bearer-choice
application/vnd.uplanet.bearer-choice-wbxml
application/vnd.uplanet.cacheop
application/vnd.uplanet.cacheop-wbxml
application/vnd.uplanet.channel
application/vnd.uplanet.channel-wbxml
application/vnd.uplanet.list
application/vnd.uplanet.list-wbxml
application/vnd.uplanet.listcmd
application/vnd.uplanet.listcmd-wbxml
application/vnd.uplanet.signal
application/vnd.vcx
application/vnd.vectorworks
application/vnd.vidsoft.vidconference
application/vnd.visio vsd vst vsw vss
application/vnd.vividence.scriptfile
application/vnd.wap.sic
application/vnd.wap.slc
application/vnd.wap.wbxml wbxml
application/vnd.wap.wmlc wmlc
application/vnd.wap.wmlscriptc wmlsc
application/vnd.webturbo
application/vnd.wordperfect wpd
application/vnd.wordperfect5.1 wp5
application/vnd.wrq-hp3000-labelled
application/vnd.wt.stf
application/vnd.xara
application/vnd.xfdl
application/vnd.yellowriver-custom-menu
application/zlib
application/x-123 wk
application/x-7z-compressed 7z
application/x-abiword abw
application/x-apple-diskimage dmg
application/x-bcpio bcpio
application/x-bittorrent torrent
application/x-cab cab
application/x-cbr cbr
application/x-cbz cbz
application/x-cdf cdf cda
application/x-cdlink vcd
application/x-chess-pgn pgn
application/x-comsol mph
application/x-core
application/x-cpio cpio
application/x-csh csh
application/x-debian-package deb udeb
application/x-director dcr dir dxr
application/x-dms dms
application/x-doom wad
application/x-dvi dvi
application/x-executable
application/x-font pfa pfb gsf
application/x-font-pcf pcf pcf.Z
application/x-freemind mm
application/x-futuresplash spl
application/x-ganttproject gan
application/x-gnumeric gnumeric
application/x-go-sgf sgf
application/x-graphing-calculator gcf
application/x-gtar gtar
application/x-gtar-compressed tgz taz
application/x-hdf hdf
#application/x-httpd-eruby rhtml
#application/x-httpd-php phtml pht php
#application/x-httpd-php-source phps
#application/x-httpd-php3 php3
#application/x-httpd-php3-preprocessed php3p
#application/x-httpd-php4 php4
#application/x-httpd-php5 php5
application/x-hwp hwp
application/x-ica ica
application/x-info info
application/x-internet-signup ins isp
application/x-iphone iii
application/x-iso9660-image iso
application/x-jam jam
application/x-java-applet
application/x-java-bean
application/x-java-jnlp-file jnlp
application/x-jmol jmz
application/x-kchart chrt
application/x-kdelnk
application/x-killustrator kil
application/x-koan skp skd skt skm
application/x-kpresenter kpr kpt
application/x-kspread ksp
application/x-kword kwd kwt
application/x-latex latex
application/x-lha lha
application/x-lyx lyx
application/x-lzh lzh
application/x-lzx lzx
application/x-maker frm maker frame fm fb book fbdoc
application/x-mif mif
application/x-mpegURL m3u8
application/x-ms-application application
application/x-ms-manifest manifest
application/x-ms-wmd wmd
application/x-ms-wmz wmz
application/x-msdos-program com exe bat dll
application/x-msi msi
application/x-netcdf nc
application/x-ns-proxy-autoconfig pac
application/x-nwc nwc
application/x-object o
application/x-oz-application oza
application/x-pkcs7-certreqresp p7r
application/x-pkcs7-crl crl
application/x-python-code pyc pyo
application/x-qgis qgs shp shx
application/x-quicktimeplayer qtl
application/x-rdp rdp
application/x-redhat-package-manager rpm
application/x-rss+xml rss
application/x-ruby rb
application/x-rx
application/x-scilab sci sce
application/x-scilab-xcos xcos
application/x-sh sh
application/x-shar shar
application/x-shellscript
application/x-shockwave-flash swf swfl
application/x-silverlight scr
application/x-sql sql
application/x-stuffit sit sitx
application/x-sv4cpio sv4cpio
application/x-sv4crc sv4crc
application/x-tar tar
application/x-tcl tcl
application/x-tex-gf gf
application/x-tex-pk pk
application/x-texinfo texinfo texi
application/x-trash ~ % bak old sik
application/x-troff t tr roff
application/x-troff-man man
application/x-troff-me me
application/x-troff-ms ms
application/x-ustar ustar
application/x-videolan
application/x-wais-source src
application/x-wingz wz
application/x-x509-ca-cert crt
application/x-xcf xcf
application/x-xfig fig
application/x-xpinstall xpi
application/x-xz xz
audio/32kadpcm
audio/3gpp
audio/amr amr
audio/amr-wb awb
audio/annodex axa
audio/basic au snd
audio/csound csd orc sco
audio/flac flac
audio/g.722.1
audio/l16
audio/midi mid midi kar
audio/mp4a-latm
audio/mpa-robust
audio/mpeg mpga mpega mp2 mp3 m4a
audio/mpegurl m3u
audio/ogg oga ogg opus spx
audio/parityfec
audio/prs.sid sid
audio/telephone-event
audio/tone
audio/vnd.cisco.nse
audio/vnd.cns.anp1
audio/vnd.cns.inf1
audio/vnd.digital-winds
audio/vnd.everad.plj
audio/vnd.lucent.voice
audio/vnd.nortel.vbk
audio/vnd.nuera.ecelp4800
audio/vnd.nuera.ecelp7470
audio/vnd.nuera.ecelp9600
audio/vnd.octel.sbc
audio/vnd.qcelp
audio/vnd.rhetorex.32kadpcm
audio/vnd.vmx.cvsd
audio/x-aiff aif aiff aifc
audio/x-gsm gsm
audio/x-mpegurl m3u
audio/x-ms-wma wma
audio/x-ms-wax wax
audio/x-pn-realaudio-plugin
audio/x-pn-realaudio ra rm ram
audio/x-realaudio ra
audio/x-scpls pls
audio/x-sd2 sd2
audio/x-wav wav
chemical/x-alchemy alc
chemical/x-cache cac cache
chemical/x-cache-csf csf
chemical/x-cactvs-binary cbin cascii ctab
chemical/x-cdx cdx
chemical/x-cerius cer
chemical/x-chem3d c3d
chemical/x-chemdraw chm
chemical/x-cif cif
chemical/x-cmdf cmdf
chemical/x-cml cml
chemical/x-compass cpa
chemical/x-crossfire bsd
chemical/x-csml csml csm
chemical/x-ctx ctx
chemical/x-cxf cxf cef
#chemical/x-daylight-smiles smi
chemical/x-embl-dl-nucleotide emb embl
chemical/x-galactic-spc spc
chemical/x-gamess-input inp gam gamin
chemical/x-gaussian-checkpoint fch fchk
chemical/x-gaussian-cube cub
chemical/x-gaussian-input gau gjc gjf
chemical/x-gaussian-log gal
chemical/x-gcg8-sequence gcg
chemical/x-genbank gen
chemical/x-hin hin
chemical/x-isostar istr ist
chemical/x-jcamp-dx jdx dx
chemical/x-kinemage kin
chemical/x-macmolecule mcm
chemical/x-macromodel-input mmd mmod
chemical/x-mdl-molfile mol
chemical/x-mdl-rdfile rd
chemical/x-mdl-rxnfile rxn
chemical/x-mdl-sdfile sd sdf
chemical/x-mdl-tgf tgf
#chemical/x-mif mif
chemical/x-mmcif mcif
chemical/x-mol2 mol2
chemical/x-molconn-Z b
chemical/x-mopac-graph gpt
chemical/x-mopac-input mop mopcrt mpc zmt
chemical/x-mopac-out moo
chemical/x-mopac-vib mvb
chemical/x-ncbi-asn1 asn
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chemical/x-ncbi-asn1-binary val aso
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image/vnd.cns.inf2
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image/vnd.fujixerox.edmics-mmr
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image/vnd.microsoft.icon ico
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image/vnd.svf
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inode/chardevice
inode/blockdevice
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text/css css
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text/directory
text/english
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text/vnd.in3d.3dml
text/vnd.in3d.spot
text/vnd.IPTC.NewsML
text/vnd.IPTC.NITF
text/vnd.latex-z
text/vnd.motorola.reflex
text/vnd.ms-mediapackage
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text/x-python py
text/x-scala scala
text/x-server-parsed-html
text/x-setext etx
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video/vnd.nokia.interleaved-multimedia
video/vnd.vivo
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x-conference/x-cooltalk ice
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gitextract_r71csxvd/ ├── .gitattributes ├── LICENSE ├── README.md ├── ipfs-chat └── mime.types
Condensed preview — 5 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (121K chars).
[
{
"path": ".gitattributes",
"chars": 34,
"preview": "/ipfs-chat linguist-language=bash\n"
},
{
"path": "LICENSE",
"chars": 35149,
"preview": " GNU GENERAL PUBLIC LICENSE\n Version 3, 29 June 2007\n\n Copyright (C) 2007 Free "
},
{
"path": "README.md",
"chars": 18832,
"preview": "# IPFS-Chat\r\n\r\n[](https://awesome.ipfs.i"
},
{
"path": "ipfs-chat",
"chars": 36496,
"preview": "#!/usr/bin/env bash\nexport LANGUAGE=C LANG=C LC_ALL=C\n# Details: See info and usage functions below\n\nexport version=\"0.3"
},
{
"path": "mime.types",
"chars": 24546,
"preview": "###############################################################################\n#\n# MIME media types and the extensions"
}
]
About this extraction
This page contains the full source code of the SomajitDey/ipfs-chat GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 5 files (112.4 KB), approximately 30.2k tokens. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.
Extracted by GitExtract — free GitHub repo to text converter for AI. Built by Nikandr Surkov.