nftables

traffic-counter-json-megabytes.sh

#!/usr/bin/env bash

# ]
#   {
#     "val": "192.168.1.23",
#     "upload": {
#       "packets": 613376,
#       "bytes": 111798380,
#       "megabytes": 106
#     },
#     "download": {
#       "packets": 165962,
#       "bytes": 21587933,
#       "megabytes": 20
#     }
#   }
# ]

nft -j list sets inet | jq '
[.nftables[].set | [select(.name  == "download").elem[].elem | 
{val, download: { packets: .counter.packets, bytes: .counter.bytes, megabytes: (.counter.bytes/1024/1024 | floor)}}] as $download | 
[select(.name == "upload").elem[].elem | { val, upload: { packets: .counter.packets, bytes: .counter.bytes, megabytes: (.counter.bytes/1024/1024 | floor)}}] | ($download + .)[]] | [group_by(.val)[] | add]'

traffic-counter-json.sh

#!/usr/bin/env bash

# output schema
# [
#     {
#         "val": "192.168.1.1",
#         "upload": {
#           "packets": 1,
#           "bytes": 8
#         },
#         "download": {
#           "packets": 1,
#           "bytes": 8
#         }
#     }
# ]

nft -j list sets inet | jq '
[.nftables[].set | 
[select(.name  == "download").elem[].elem | {val, download: .counter}] as $download | 
[select(.name == "upload").elem[].elem | { val, upload: .counter}] | ($download + .)[]] | 
[group_by(.val)[] | add]'

traffic-counter-json2.sh

#!/usr/bin/env bash

# output schema:
# [
#     {
#         "192.168.1.1": {
#             "upload": {
#               "packets": 1,
#               "bytes": 8
#             },
#             "download": {
#               "packets": 1,
#               "bytes": 8
#             }
#         }
#     }
# ]

nft -j list sets inet | jq '
[.nftables[].set | 
[select(.name  == "download").elem[].elem | {val, download: .counter}] as $download | 
[select(.name == "upload").elem[].elem | { val, upload: .counter}] | ($download + .)[]] | 
[group_by(.val)[] | add] | [.[] | {(.val| tostring): {upload, download}}]'

traffic-counter.conf

#!/usr/sbin/nft -f

define DEV_LAN = br0
define NET_LAN = 192.168.1.1/24
define NET_LAN6 = fe80::/10

add table inet global
flush table inet global

table inet global {
	set upload {
		typeof ip saddr
		flags dynamic 
		counter
	}
	set download {
		typeof ip daddr
		flags dynamic 
		counter
	}
	set upload6 {
		typeof ip6 saddr
		flags dynamic 
		counter
	}
	set download6 {
		typeof ip6 daddr
		flags dynamic 
		counter
	}
	chain mangle_output {
        type route hook output priority mangle; policy accept;
        oifname $DEV_LAN ip daddr $NET_LAN update @download { ip daddr counter }
        oifname $DEV_LAN ip6 daddr $NET_LAN6 update @download6 { ip6 daddr counter }
	}
	chain mangle_prerouting {
        type filter hook prerouting priority mangle; policy accept;
		iifname $DEV_LAN ip saddr $NET_LAN update @upload { ip saddr counter }
        iifname $DEV_LAN ip6 saddr $NET_LAN6 update @upload6 { ip6 saddr counter }
	}
}