host

#!/bin/sh
SERVER="${SERVER:-mumble.ugent.be}"
pairinguser="pairing@$SERVER"

set -e

for COMMAND in abduco socat ssh uuidgen dvtm; do
	if ! command -v $COMMAND > /dev/null 2>&1; then
		printf '%s found: no\n' "$COMMAND"
		exit
	fi
done

# Create a temporary directory for our sockets
umask 077
socketdir="$(mktemp -d)"
trap "rm -rf '$socketdir'" EXIT

# Invent a secret session name
session="$(uuidgen)"
read -p "Copy this session key and hit enter to start: $session" unused

# Create the session in which you'll host, in the background
SESSION_NAME="$session" SESSION_SOCKET="$socketdir/abduco" abduco -n "$socketdir/abduco"

# Create an SSH master connection in the background, to allow asking for passphrases
ssh -N -f -M -S "$socketdir/ssh" "$pairinguser"

# Connect our sessions socket to a remote socket over our existing ssh connection
socat unix:"$socketdir/abduco" exec:"ssh -S '$socketdir/ssh' '$pairinguser' 'host $session'" &
socatpid="$!"

# Attach to the session created earlier
abduco -a "$socketdir/abduco"

# Close in reverse order
kill "$socatpid" || true
ssh -O exit -S "$socketdir/ssh" "$pairinguser"
wait