Wiki source code of Filter unwanted LoRaWAN packets
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| author | version | line-number | content |
|---|---|---|---|
| 1 | **~ Table of Contents:** | ||
| 2 | |||
| 3 | {{toc/}} | ||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 | |||
| 8 | |||
| 9 | = 1. Introduction = | ||
| 10 | |||
| 11 | |||
| 12 | This feature is to filter the unwanted LoRaWAN packets. Purpose is to save the upstream traffic especially for a 4G cellular connection. If configured, gateway will process filter for below two types of message: | ||
| 13 | |||
| 14 | * Unconfirmed Data Up | ||
| 15 | |||
| 16 | * Confirmed Data Up | ||
| 17 | |||
| 18 | = 2. FWD Filter Mechanism = | ||
| 19 | |||
| 20 | |||
| 21 | (% class="wikigeneratedid" id="H1.1SupportDevices" %) | ||
| 22 | **Support Devices:** | ||
| 23 | |||
| 24 | * Firmware Version > ** dragino-lgw~-~-v5.4.1658824252** | ||
| 25 | |||
| 26 | * LG308, DLOS8, LPS8, LIG16, LG308N, DLOS8N, LPS8N | ||
| 27 | |||
| 28 | **Filtering rules:** | ||
| 29 | |||
| 30 | (% border="1" style="background-color:#f2f2f2; width:728px" %) | ||
| 31 | |=(% colspan="2" style="width: 351px;background-color:#D9E2F3;color:#0070C0" %)Fport Filter|=(% colspan="2" style="width: 374px;background-color:#D9E2F3;color:#0070C0" %)DevAddr Filter | ||
| 32 | |(% style="width:66px" %)**Level 0**|(% style="width:284px" %)Do nothing|(% style="width:68px" %)**Level 0**|(% style="width:306px" %)Do nothing | ||
| 33 | |(% style="width:66px" %)**Level 1**|(% style="width:284px" %)Filter only the Fport in the list|(% style="width:68px" %)**Level 1**|(% style="width:306px" %)Filter only the DevAddr in the list | ||
| 34 | |(% style="width:66px" %)**Level 2**|(% style="width:284px" %)Filter Fport that are not in the database|(% style="width:68px" %)**Level 2**|(% style="width:306px" %)Filter DevAddr that are not in the database | ||
| 35 | |||
| 36 | ((( | ||
| 37 | [[image:image-20220726171434-6.png||height="628" width="692"]] | ||
| 38 | |||
| 39 | |||
| 40 | **Check if the filter is running** | ||
| 41 | |||
| 42 | [[image:image-20220726164533-3.png||height="465" width="982"]] | ||
| 43 | |||
| 44 | |||
| 45 | == 2.1 Filter By Fport == | ||
| 46 | |||
| 47 | |||
| 48 | The Gateway FPort filter will check all the below LoRaWAN messages: Unconfirmed Data Up & Confirmed Data Up. | ||
| 49 | |||
| 50 | |||
| 51 | (% style="color:red" %)**Important Notice:** | ||
| 52 | |||
| 53 | * By default, Fport Filter (% style="color:blue" %)**Level=0**(%%). which means do nothing | ||
| 54 | |||
| 55 | * Fport Filter configured to (% style="color:blue" %)**Level=1**(%%). If the Fport in the list matches the Fport received by the gateway, it will be dropped. | ||
| 56 | |||
| 57 | * Fport Filter configured to (% style="color:blue" %)**Level=2**(%%). If the Fport in the list does not match the Fport received by the gateway, it will be dropped. | ||
| 58 | |||
| 59 | If you want to **forward only a certain Fport**, use level=2 and add the desired fport in the Filter value textbox. **Add Filter Value 0 to forward Join requests**. | ||
| 60 | |||
| 61 | [[image:image-20221129101012-1.png]] | ||
| 62 | |||
| 63 | |||
| 64 | In this case, we set Fport Filter Level=1 and add the filter (server | fport | 0), when the gateway receives a Lorawan packet with Fport=0, it will be dropped. | ||
| 65 | |||
| 66 | [[image:image-20220726165311-4.png||height="718" width="798"]] | ||
| 67 | |||
| 68 | |||
| 69 | [[image:image-20220726170532-5.png]] | ||
| 70 | |||
| 71 | |||
| 72 | == 2.2 Filter By DevAddr == | ||
| 73 | |||
| 74 | |||
| 75 | The Gateway DevAddr filter will check all the below LoRaWAN messages: Unconfirmed Data Up & Confirmed Data Up. | ||
| 76 | |||
| 77 | |||
| 78 | (% style="color:red" %)**Important Notice:** | ||
| 79 | |||
| 80 | * By default, DevAddr Filter (% style="color:blue" %)**Level=0**(%%). which means do nothing | ||
| 81 | |||
| 82 | * DevAddr Filter configured to (% style="color:blue" %)**Level=1**(%%). If the DevAddr in the list matches the DevAddr received by the gateway, it will be dropped. | ||
| 83 | |||
| 84 | * DevAddr Filter configured to (% style="color:blue" %)**Level=2**(%%). If the DevAddr in the list does not match the DevAddr received by the gateway, it will be dropped. | ||
| 85 | |||
| 86 | In this case, we set DevAddr Filter Level=0 and add the filter (server | DevAddr | 12664787 ), when the gateway receives a Lorawan packet with DevAddr=12664787, it will be dropped. | ||
| 87 | |||
| 88 | |||
| 89 | [[image:image-20220726171555-7.png||height="754" width="765"]] | ||
| 90 | |||
| 91 | |||
| 92 | [[image:image-20220726171808-8.png]] | ||
| 93 | |||
| 94 | |||
| 95 | **If user need to set the Secondary LoRaWAN Server Packet Filter, the configuration is similar to that above.** | ||
| 96 | |||
| 97 | |||
| 98 | == 2.3 Add Filter rules via Linux Command. == | ||
| 99 | |||
| 100 | |||
| 101 | (% class="box infomessage" %) | ||
| 102 | ((( | ||
| 103 | $ sqlite3 /etc/lora/devskey "INSERT INTO filter (name, type, value ) VALUES ('$filter_name', '$filter_type', '$filter_value');" | ||
| 104 | |||
| 105 | |||
| 106 | |||
| 107 | name: server name. eg: server1/server2 | ||
| 108 | |||
| 109 | type: filter type. eg: fport/devaddr | ||
| 110 | |||
| 111 | value: 0,1,2,3/000000 | ||
| 112 | ))) | ||
| 113 | |||
| 114 | (% class="box" %) | ||
| 115 | ((( | ||
| 116 | eg: | ||
| 117 | |||
| 118 | sqlite3 /etc/lora/devskey "INSERT INTO filter (name, type, value ) VALUES ('server1', 'fport', '1');" | ||
| 119 | |||
| 120 | sqlite3 /etc/lora/devskey "INSERT INTO filter (name, type, value ) VALUES ('server1', 'devaddr', '00000000');" | ||
| 121 | |||
| 122 | sqlite3 /etc/lora/devskey "SELECT *from filter" | ||
| 123 | ))) | ||
| 124 | |||
| 125 | [[image:image-20230519104800-2.png]] | ||
| 126 | |||
| 127 | |||
| 128 | |||
| 129 | ))) | ||
| 130 | |||
| 131 | = 3. PKT_FWD Filter Mechanism = | ||
| 132 | |||
| 133 | |||
| 134 | (% class="wikigeneratedid" id="H1.1SupportDevices" %) | ||
| 135 | **Support Devices:** | ||
| 136 | |||
| 137 | * Firmware Version >** lgw~-~-build-v5.4.1602379434-20201011-0926** [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]] | ||
| 138 | |||
| 139 | * LG308, DLOS8 | ||
| 140 | |||
| 141 | * LPS8 | ||
| 142 | |||
| 143 | **Fport & DevAddr Filter** | ||
| 144 | |||
| 145 | [[image:image-20220527150138-1.png]] | ||
| 146 | |||
| 147 | |||
| 148 | Check if the filter is running | ||
| 149 | |||
| 150 | [[image:image-20220527150222-2.png||height="379" width="1062"]] | ||
| 151 | |||
| 152 | |||
| 153 | == 3.1 Filter By Fport == | ||
| 154 | |||
| 155 | |||
| 156 | The Gateway FPort filter will check all the below LoRaWAN message: Unconfirmed Data Up & Confirmed Data Up. If the packet's FPort doesn't match the FPort setting, it will be dropped. | ||
| 157 | |||
| 158 | ((( | ||
| 159 | By default , this value is 0 means can upstream all packets with any FPort. We can set to other FPort so specify only one FPort works. | ||
| 160 | ))) | ||
| 161 | |||
| 162 | [[image:image-20220527150303-3.png]] | ||
| 163 | |||
| 164 | |||
| 165 | In case we set the FPort filter to 45, and the End Node send a packet with Fport other than 45, it will be dropped. | ||
| 166 | |||
| 167 | |||
| 168 | == 3.2 Filter By DevAddr == | ||
| 169 | |||
| 170 | |||
| 171 | Gateway will use a DevAddr mask to check if the Unconfirmed Data Up & Confirmed Data Up packets match the mask . If not, gateway will drop it. | ||
| 172 | |||
| 173 | [[image:image-20220527150404-4.png]] | ||
| 174 | |||
| 175 | |||
| 176 | This screenshot shows packets is dropped if DevAddr mask doesn't match. | ||
| 177 | |||
| 178 |