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#!/usr/bin/env bash
###
### arching-kaos-tools
### Tools to interact and build an Arching Kaos Infochain
### Copyright (C) 2021 - 2025  kaotisk
###
### 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 <http://www.gnu.org/licenses/>.
###
source $AK_LIBDIR/_ak_log

cjdnstoolspath="$HOME/cjdns/tools"

function _ak_network_cjdns_scan_dump(){
    #
    # Needs CJDNS tools in your PATH
    #
    # Ref: https://github.com/cjdelisle/cjdns
    #
    which dumpLinks > /dev/null 2>&1
    if [ $? -ne 0 ]
    then
        echo "You need to install cjdns and cjdns-tools ... falling back to -w"
        _ak_network_cjdns_scan_full
        exit 0
    fi
    which publictoip6 > /dev/null 2>&1
    if [ $? -ne 0 ]
    then
        echo "You need to install cjdns and cjdns-tools ... falling back to -w"
        _ak_network_cjdns_scan_full
        exit 0
    fi
    TEMPDIR="$(_ak_make_temp_directory)"
    AK_ZPEERSFILE="$HOME/.arching-kaos/peersFile"
    cd $TEMPDIR
    max="$(dumpLinks |wc -l)"
    dumpLinks \
        | cut -d ' ' -f 2,4 \
        | sed 's/ /\n/g' \
        | sort \
        | uniq \
        | grep -v `dumpLinks | grep '0000\.0000\.0000\.0001' \
        | cut -d ' ' -f 2` > dumpedLinks
    counter=0
    count=0
    max="$(cat dumpedLinks| wc -l)"
    printf '[' > walk.aknet
    cat dumpedLinks \
        | while read -r ip || [ -n "$ip" ]
    do
        count="$(( $count + 1 ))"
        _ak_log_debug "Scanning [${count}/${max}] $(publictoip6 $ip)..."
        node_info="$(curl \
            --connect-timeout 3 \
            -A 'akd/0.1.0; https://github.com/arching-kaos' \
            "http://[$(publictoip6 $ip)]:8610/v0/node_info" 2>/dev/null | jq -c -M)"
        if [ $? -eq 0 ] && [ $(echo -n "$node_info" | wc -c) -gt 0 ]
        then
            if [ "$counter" -ne "0" ]
            then
                printf ',' >> walk.aknet
            fi
            if [ ! -n "$node_info" ]
            then
                node_info="null"
            fi
            printf '{"cjdns":{"public_key":"%s","ip":"%s"},"node_info":%s}' \
                "$ip" "`publictoip6 $ip`" "$node_info" >> walk.aknet
            counter="`expr $counter + 1`"
        fi
    done
    printf ']' >> walk.aknet
    mv walk.aknet $AK_ZPEERSFILE.hyperboria
    rm -rf $TEMPDIR
}

function _ak_network_cjdns_scan_full(){
    # This scan is using HIA resources to scan the whole cjdns network for peers
    #
    # Ref:
    #  - https://github.com/ircerr/hia/
    #  - http://hia.cjdns.ca/watchlist/c/walk.pubkey
    #  - http://hia.cjdns.ca/watchlist/hia.iplist
    #
    TEMPDIR="$(_ak_make_temp_directory)"
    cd $TEMPDIR
    pubkeys_ips="$TEMPDIR/pi"
    online_ips="$TEMPDIR/oi"
    filtered_online_pubkeys_ips="$TEMPDIR/fopi"
    curl -s \
        --connect-timeout 5 \
        "http://hia.cjdns.ca/watchlist/c/walk.pubkey" > $pubkeys_ips
    if [ $? -ne 0 ]
    then
        _ak_log_error "Couldn't fetch DB from HIA"
        exit 1
    fi
    curl -s \
        --connect-timeout 5 \
        "http://hia.cjdns.ca/watchlist/hia.iplist" > $online_ips
    if [ $? -ne 0 ]
    then
        _ak_log_error "Couldn't fetch iplist from HIA"
        exit 1
    fi
    cat $online_ips | while read line
    do
        grep -F "$line" $pubkeys_ips >> $filtered_online_pubkeys_ips
    done
    counter=0
    count=0
    max="$(cat $filtered_online_pubkeys_ips|wc -l)"
    printf '[' > walk.aknet
    cat $filtered_online_pubkeys_ips \
        | sort \
        | uniq \
        | while read -r pkey ip || [ -n "$ip" ]
    do
        count="$(( $count + 1 ))"
        _ak_log_debug "Scanning [${count}/${max}] $ip..."
        node_info="$(curl \
            --connect-timeout 3 \
            -A 'akd/0.1.0; https://github.com/arching-kaos' \
            "http://[$ip]:8610/v0/node_info" 2>/dev/null | jq -c -M)"
        if [ $? -eq 0 ] && [ $(echo -n "$node_info" | wc -c) -gt 0 ]
        then
            if [ "$counter" -ne "0" ]
            then
                printf ',' >> walk.aknet
            fi
            if [ ! -n "$node_info" ]
            then
                node_info="null"
            fi
            printf '{"cjdns":{"public_key":"%s","ip":"%s"},"node_info":%s}' \
                "$pkey" "$ip" "$node_info" >> walk.aknet
            counter="`expr $counter + 1`"
        fi
    done
    printf ']' >> walk.aknet
    mv walk.aknet $AK_ZPEERSFILE.hyperboria
    rm -rf $TEMPDIR
}

function _ak_network_cjdns_scan(){
    if [ ! -z $1 ] && [ -n "$1" ]
    then
        case $1 in
            -w | --whole) _ak_network_cjdns_scan_full; exit;;
            -d | --dump) _ak_network_cjdns_scan_dump; exit;;
            *) _ak_network_cjdns_scan_dump; exit;;
        esac
    else
        _ak_network_cjdns_scan_dump
    fi
}

function _ak_network_yggdrasil_scan(){
    if [ ! -z $1 ] && [ -n "$1" ]
    then
        case $1 in
            *) _ak_network_yggdrasil_scan_full; exit;;
        esac
    else
        _ak_network_yggdrasil_scan_full
    fi
}

function _ak_network_cjdns_show_peers(){
    if [ -f $AK_ZPEERSFILE.hyperboria ]
    then
        cat $AK_ZPEERSFILE.hyperboria | jq
    else
        _ak_log_debug "No hyperboria peers found"
    fi
}

function _ak_network_cjdns_connect(){
    if [ ! -z $1 ] && [ -n "$1" ] && [ -f $1 ]
    then
        peersfile="$1"
    else
        peersfile="$(_ak_make_temp_file)"
        tmpon="yes"
        curl -s "https://arching-kaos.net/files/ak_cjdns_bootstrap_peers" > $peersfile
    fi
    totalpeers="$(jq '. | length' < $peersfile)"
    number="0"
    interface="0"
    while [ $number -lt $totalpeers ]
    do
        address="$(jq -r '.['$number'].address' < $peersfile)"
        login="$(jq -r '.['$number'].login' < $peersfile)"
        password="$(jq -r '.['$number'].password' < $peersfile)"
        publicKey="$(jq -r '.['$number'].publicKey' < $peersfile)"
        peerName="$(jq -r '.['$number'].peerName' < $peersfile)"
        if [ $(echo $address | grep '\[') ]
        then
            interface="1"
        else
            interface="0"
        fi
        $cjdnstoolspath/cexec 'UDPInterface_beginConnection("'$publicKey'", "'$address'", "'$peerName'", "'$password'", "'$login'", '$interface')'
        number="$(( $number + 1 ))"
    done
    if [ "$tmpon" == "yes" ]
    then
        rm $peersfile
    fi
}

function _ak_network_cjdns_connect_bootstrap(){
    _ak_network_cjdns_connect
}