freedombone/src/meshavahi

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#!/bin/bash
#
# .---. . .
# | | |
# |--- .--. .-. .-. .-.| .-. .--.--. |.-. .-. .--. .-.
# | | (.-' (.-' ( | ( )| | | | )( )| | (.-'
# ' ' --' --' -' - -' ' ' -' -' -' ' - --'
#
# Freedom in the Cloud
#
# A script for using avahi to discover peers and update tox/ipfs
# License
# =======
#
# Copyright (C) 2015-2016 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
PROJECT_NAME='freedombone'
export TEXTDOMAIN=$PROJECT_NAME-meshavahi
export TEXTDOMAINDIR="/usr/share/locale"
MESH_USERNAME='fbone'
MY_USERNAME=$MESH_USERNAME
IPFS_PORT=4001
IPFS_PATH=/usr/bin
IPFS_COMMAND=$IPFS_PATH/ipfs
IPFS_USERS_FILE=/tmp/.ipfs-users
IPFS_PUBLIC=/home/$MY_USERNAME/.ipfs-public
# contains the output of the avahi command
TEMPFILE_BASE=$(mktemp /tmp/meshavahibase.XXXXXX)
TEMPFILE=$(mktemp /tmp/meshavahi.XXXXXX)
# List of tox users previously seen
PREV_TOX_USERS_FILE=/root/.prev_tox_users
function ipfs_publish {
# Publishes anything within the ~/Public directory
DIR_TO_CHECK=/home/$MY_USERNAME/Public
if [ ! -d $DIR_TO_CHECK ]; then
return
fi
OLD_STAT_FILE=/home/$MY_USERNAME/.old_stat.txt
if [ -e $OLD_STAT_FILE ]
then
OLD_STAT=$(cat $OLD_STAT_FILE)
else
OLD_STAT="nothing"
fi
NEW_STAT=$(stat -t $DIR_TO_CHECK)
if [ "$OLD_STAT" != "$NEW_STAT" ]; then
su -c "echo \$($IPFS_COMMAND add -rq /home/$MY_USERNAME/Public | tail -n 1) > $IPFS_PUBLIC" - $MY_USERNAME
echo "$NEW_STAT" > $OLD_STAT_FILE
chown $MY_USERNAME:$MY_USERNAME $OLD_STAT_FILE
fi
if [ -f $IPFS_PUBLIC ]; then
IPFS_PUBLIC_ID=$(cat $IPFS_PUBLIC)
su -c "$IPFS_COMMAND name publish /ipfs/$IPFS_PUBLIC_ID" - $MY_USERNAME
fi
}
function ipfs_bootstrap {
cat $TEMPFILE_BASE | grep "ipfs_id\|hostname =\|address =\|port =\|txt =" > $TEMPFILE
state=0
address=""
peer=""
if [ -d /home/$MY_USERNAME/Desktop ]; then
echo -n '' > ${IPFS_USERS_FILE}.new
fi
while IFS='' read -r line || [[ -n "$line" ]]; do
if [ ${state} -eq "3" ]; then
if [[ $line == *"txt ="* ]]; then
ipfs_txt=$(echo "$line" | awk -F '[' '{print $2}' | awk -F ']' '{print $1}' | awk -F '"' '{print $2}')
ipfs_peer_id=$(echo "$ipfs_txt" | awk -F ':' '{print $1}')
ipfs_tox_id=$(echo "$ipfs_txt" | awk -F ':' '{print $2}')
su -c "$IPFS_COMMAND bootstrap add /ip4/${address}/tcp/${IPFS_PORT}/ipfs/${ipfs_peer_id}" - $MY_USERNAME
if [ -d /home/$MY_USERNAME/Desktop ]; then
if [[ $ipfs_tox_id != 'none' ]]; then
echo "$ipfs_tox_id:$ipfs_peer_id" >> ${IPFS_USERS_FILE}.new
fi
fi
state=0
fi
fi
if [ ${state} -eq "2" ]; then
if [[ $line == *"address ="* ]]; then
address=$(echo $line | awk -F '[' '{print $2}' | awk -F ']' '{print $1}')
state=3
fi
fi
if [ ${state} -eq "1" ]; then
if [[ $line == *"hostname ="* ]]; then
peer=$(echo $line | awk -F '[' '{print $2}' | awk -F ']' '{print $1}')
state=2
fi
fi
if [[ $line == *"ipfs_id"* && $line == "= "* ]]; then
state=1
fi
done < "$TEMPFILE"
# Create a list of user sites, in alphabetical order by Tox nick
if [ -d /home/$MY_USERNAME/Desktop ]; then
if [ -f ${IPFS_USERS_FILE}.new ]; then
sites_list=$(cat ${IPFS_USERS_FILE}.new | sort -d)
echo "${sites_list}" > ${IPFS_USERS_FILE}
chown $MY_USERNAME:$MY_USERNAME ${IPFS_USERS_FILE}
rm ${IPFS_USERS_FILE}.new
fi
fi
}
function detect_new_tox_users {
CURRENT_USERS_FILE=$1
if [ ! -f $CURRENT_USERS_FILE ]; then
return
fi
# Check that this is a GUI installation with a desktop
if [ ! -d /home/$MESH_USERNAME/Desktop ]; then
return
fi
# Produce notifications if new users appear
if [ -f $PREV_TOX_USERS_FILE ]; then
while IFS='' read -r line || [[ -n "$line" ]]; do
if [[ $line != "Failed*" && $line != "data "* && $line != "Anon "* && $line != "anon "* ]]; then
if ! grep -q "$line" $PREV_TOX_USERS_FILE; then
# get the nick of the user
toxidstr=$(echo "$line" | awk -F ' ' '{print $(NF)}')
toxuser=$(echo "$line" | sed "s| $toxidstr||g")
if [ -r "/home/$MESH_USERNAME/.dbus/Xdbus" ]; then
. "/home/$MESH_USERNAME/.dbus/Xdbus"
fi
export DISPLAY=:0.0
export XAUTHORITY=/home/$MESH_USERNAME/.Xauthority
sudo -u $MESH_USERNAME /usr/bin/notify-send $"$toxuser" $"has joined the mesh" --icon=dialog-information
break
fi
fi
done < "$CURRENT_USERS_FILE"
fi
# Store the previous tox users list
cp -f $CURRENT_USERS_FILE $PREV_TOX_USERS_FILE
}
function detect_tox_users {
# don't show the first peer field
lstox | awk -F ' ' '{$1=""; print $0}' | sed -e 's/^[[:space:]]*//' | sort -d > $TEMPFILE
detect_new_tox_users $TEMPFILE
}
function avahi_extract_info {
# Create a list of bootstrap nodes
avahi-browse -atr > $TEMPFILE_BASE
cat $TEMPFILE_BASE | grep "hostname =\|address =\|port =" > $TEMPFILE
if [ ! -f $TEMPFILE ]; then
exit 1
fi
}
function avahi_remove_info {
rm -f $TEMPFILE_BASE
rm -f $TEMPFILE
}
if [ ! -d /etc/avahi ]; then
exit 0
fi
avahi_extract_info
ipfs_bootstrap
ipfs_publish
detect_tox_users
avahi_remove_info
exit 0