Mqtt/rotzt

Kommunikationsprotokoll

Router fragt neuer nach Adresse "asknew MAC" -> Alle antworten "usethis ASSIGNER MAC IP" ---> Router nutzt die erste msg die rein ploppt [Filter]

Router fragt ob er Adresse noch nutzen darf "canusethis MAC ASSIGNER IP" -> Vergeber antwortet "MAC ack ASSIGNER IP" --> Router nutzt Adresse weiter [Prüfscript] (dies muss alle 5 Minuten erledigt werden)

-> Vergeber antwortet "MAC nack ASSIGNER IP" --> Router frag neuer nach Adresse (Line 1)

-> Vergeber antwortet gar nicht --> Router frag neuer nach Adresse (Line 1)

Vergeber gibt Adresse frei wenn kein "canusethis" mehr kommt, er kann frei entscheiden wann er sie freigeben will, es sollte jedoch mindestens 1h sein um nicht ständig neue Adressen durch kurze Downtimes zu triggern (bei genug Adressen auch gerne deutlich mehr).

MAC => eindeutige Identifikation des Routers ASSIGNER => eindeutige Identifikation des mqtt Clients der IP Adressen vergibt

[Prüfscript] Prüfscript ob die Adresse funktioniert: Sie funktioniert: -> Vote positiv Sie funktioniert nicht -> Vote negativ --> Router frag neuer nach Adresse (Line 1)

[Filter] - Frage alle /ipv6/vote ab, mehr negativ als positiv filter out (mosquitto_sub -T '/ipv6/usethis/#/$ASSIGNER') - Manueller Filter für User (mosquitto_sub -T '/ipv6/usethis/#/$ASSIGNER') $ASSIGNER IST USERINPUT

/ipv6/asknew $MAC

/ipv6/usethis/$MAC/$ASSIGNER (wir brauchen $ASSIGNER da oben für [Filter]) { "assigner":"$ASSIGNER", "ip":"$IP" }

/ipv6/canusethis/$ASSIGNER { "mac":"$MAC", "ip":"$IP" }

/ipv6/canusethisanswer/$MAC ack

/ipv6/vote/$MACADDR/$ASSIGNER (retain) ack/nack

/etc/config/autol3 config ipv6 option ipv6 'ADRESSE' option assigner 'ASSIGNER

1. !/bin/sh

. /usr/share/libubox/jshn.sh

MACADDR=$(cat /sys/class/net/br-mesh/address | /bin/sed 's/://g') MQTTSERVER=$(uci -q get mqtt.mqtt.server) ASSIGNEROWN=$(uci -q get fff.autol3.assigner) IPOWN=$(uci -q get fff.autol3.address) asknew() {

       mosquitto_pub -h $MQTTSERVER -p 1883 -t '/ipv6/asknew' -m "$MACADDR"
       # use the first income message
       # cancel after 5 second, after this time we don't get any IP address
       autol3config=$(mosquitto_sub -h $MQTTSERVER -p 1883 -t '/ipv6/usethis/#' -C 1)
       if [ -z "$autol3config" ] ; then
               echo "No IP get"
               exit 1;
       fi
       json_load "$autol3config"
       json_get_var assigner assigner
       json_get_var ip ip
       uci set fff.autol3.address=$ip
       uci set fff.autol3.assigner=$assigner
       uci commit fff
       uci del gateway.@client[0].ip6addr
       uci add_list gateway.@client[0].ip6addr=$ip
       uci commit gateway
       yes | configure-layer3 -c
       configure-layer3 -a
       exit;

}

canusethis() {

       mosquitto_pub -h "$(uci get mqtt.mqtt.server)" -p 1883 -t /ipv6/canusethis/$ASSIGNEROWN -m "{ \"mac\":\"$MACADDR\", \"ip\":\"$IPOWN\" }"
       canusethisanswer=$(mosquitto_sub -h $MQTTSERVER -p 1883 -t /ipv6/canusethisanswer/$MACADDR -C 1 -W 5)
       # check if we get answer, if no load asknew again and get new ip address
       if [ -z $canusethisanswer ] ; then
               uci del fff.autol3.address
               uci del fff.autol3.assigner
               uci commit fff
               asknew
       fi

}

if [ -z $(uci -q get fff.autol3) ] ; then

       uci set fff.autol3=autol3

fi

if [ -n $(uci -q get fff.autol3) ] && [ -z $(uci -q get fff.autol3.address) ] ; then

       asknew

fi

if [ -n $(uci -q get fff.autol3.address) ] ; then

       canusethis

fi

Node-Red Code

{ "f8:1a:67:a6:03:05": "<?xml version='1.0' standalone='yes'?><system_data><status>online</status><hostname>testknoten</hostname><description><![CDATA[Test]]></description><geo><lat>49.47271864</lat><lng>10.95820785</lng></geo><position_comment><![CDATA[Test]]></position_comment><contact>fff-router@chrisi01.de</contact><uptime>202139.89</uptime><idletime>199206.18</idletime><memory_total>124256</memory_total><memory_free>75988</memory_free><memory_buffering>4060</memory_buffering><memory_caching>17880</memory_caching><chipset>Freescale P1014</chipset><cpu>TP-Link TL-WDR4900 v1</cpu><model>TP-Link TL-WDR4900 v1</model><local_time>1608675321</local_time><loadavg>0.00</loadavg><processes>1/52</processes><kernel_version>4.14.209</kernel_version><nodewatcher_version>59</nodewatcher_version><babel_version>babeld-1.9.2+fff1</babel_version><distname>OpenWrt</distname><distversion>19.07.5</distversion><firmware_version>layer3-20200501-53-geaa5286-dirty</firmware_version><firmware_revision>build date: Sat Dec 19 13:30:34 UTC 2020</firmware_revision><openwrt_core_revision>v19.07.5</openwrt_core_revision><openwrt_feeds_packages_revision>2974079d3db786fe5da00c10f1d80e79b0112093</openwrt_feeds_packages_revision><hood>test</hood><hoodid></hoodid><vpn_active>0</vpn_active></system_data><interface_data><br-mesh><name>br-mesh</name><mtu>1500</mtu><mac_addr>f8:1a:67:a6:03:05</mac_addr><ipv4_addr>10.83.228.1</ipv4_addr><ipv6_addr>2a0b:f4c0:1a:58::/64</ipv6_addr><ipv6_addr>fdff::fa1a:67ff:fea6:305/64</ipv6_addr><ipv6_addr>fdff::1/64</ipv6_addr><ipv6_addr>fdff::f81a:67a6:305/64</ipv6_addr><ipv6_link_local_addr>fe80::fa1a:67ff:fea6:305/64</ipv6_link_local_addr><traffic_rx>0</traffic_rx><traffic_tx>33532</traffic_tx></br-mesh><eth0.1><name>eth0.1</name><mtu>1500</mtu><mac_addr>f8:1a:67:a6:03:05</mac_addr><traffic_rx>0</traffic_rx><traffic_tx>33532</traffic_tx></eth0.1><eth0.2><name>eth0.2</name><mtu>1500</mtu><mac_addr>f8:1a:67:a6:03:05</mac_addr><traffic_rx>0</traffic_rx><traffic_tx>23020680</traffic_tx></eth0.2><eth0.3><name>eth0.3</name><mtu>1500</mtu><mac_addr>fa:1a:67:a6:03:04</mac_addr><traffic_rx>837126540</traffic_rx><traffic_tx>256736647</traffic_tx></eth0.3><eth0><name>eth0</name><mtu>1500</mtu><mac_addr>f8:1a:67:a6:03:05</mac_addr><traffic_rx>867779840</traffic_rx><traffic_tx>299961031</traffic_tx></eth0><w2ap><name>w2ap</name><mtu>1500</mtu><mac_addr>f8:1a:67:a6:03:04</mac_addr><traffic_rx>2338</traffic_rx><traffic_tx>16948755</traffic_tx><wlan_mode>Master</wlan_mode><wlan_tx_power>18 dBm</wlan_tx_power><wlan_ssid>bla.freifunk</wlan_ssid><wlan_type>AP</wlan_type><wlan_channel>13</wlan_channel><wlan_width>20</wlan_width></w2ap></interface_data><client_count>0</client_count><clients><eth0.1>0</eth0.1><w2ap>0</w2ap></clients><airtime2><active>171849671</active><busy>21780087</busy></airtime2><traffic_control><wan><enabled>0</enabled><in>0</in><out>0</out></wan></traffic_control><babel_neighbours><neighbour><ip>fe80::ba27:ebff:fe54:3b09</ip><outgoing_interface>eth0.3</outgoing_interface><link_cost>96</link_cost></neighbour><neighbour><ip>fe80::eade:27ff:fe58:ee94</ip><outgoing_interface>eth0.3</outgoing_interface><link_cost>256</link_cost></neighbour><neighbour><ip>fe80::fa1a:67ff:fe5a:857e</ip><outgoing_interface>eth0.3</outgoing_interface><link_cost>256</link_cost></neighbour></babel_neighbours>\n" }