From mboxrd@z Thu Jan  1 00:00:00 1970
From: sean darcy <seandarcy2@gmail.com>
Subject: Re: nft ingress won't work on wireless ?
Date: Mon, 9 Mar 2020 12:13:37 -0400
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On 3/9/20 9:36 AM, sean darcy wrote:
> Fedora 31. nftables-0.9.1-3.fc31.x86_64
> 
> The same ingress rule works on the ethernet port, but not on wireless.
> 
> This works:
> 
> 
> cat  ipv4-netdev-asterisk
> # /opt/nftables/ipv4-filter-asterisk
> 
> include "/opt/nftables/whitelist1"
> include "/opt/nftables/ip.blacklist1"
> 
> table netdev netdev1 {
>         set whitelist {
>                  type ipv4_addr
>                  flags interval
>                  auto-merge
>                  elements = $whitelist_ips
>          }
> 
>          set blacklist {
>                  type ipv4_addr
>                  flags interval
>                  auto-merge
>                  elements = $blacklist_ips
>          }
> 
>          chain ingress1 {
>          type filter hook ingress device enp5s0 priority 0; policy accept;
>                  udp dport { 6000-31000 } accept comment  rtp_ports
>                  #accept whitelist
>                  ip saddr @whitelist accept
>                  tcp dport { 3478, 5349, 554, 5222, 5269, 19294 } 
> counter accept comment "stun stun-tls rtsp and gv"
>                  udp dport { 3478, 4893, 19295, 19302 } counter accept 
> comment "stun and gv"
>                  #drop blacklist
>                  ip saddr @blacklist counter drop
>          }
> }
> 
> 
> But if I change the device in the ingress1 chain to wlp4s0, which exists:
> 
>   ifconfig | grep -A 1 wlp4s0
> wlp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>          inet 10.0.0.61  netmask 255.255.255.0  broadcast 10.0.0.255
> 
> it fails.
> 
> nft[4158]: In file included from /opt/nftables/whitelist1:39:2-39:
> nft[4158]:                  from 
> /opt/nftables/ipv4-netdev-asterisk-wlp4s0:6:1-35:
> nft[4158]:                  from /etc/sysconfig/nftables.conf:17:1-52:
> nft[4158]: /opt/nftables/ip.blacklist1:1124:15-22: Error: Could not 
> process rule: Device or resource busy
> systemd[1]: nftables.service: Main process exited, code=exited, 
> status=1/FAILURE
> 
> Just to repeat: the only change is the device. The other files are all 
> the same.
> 
> Puzzled,
> 
> sean
> 
> 

kernel 5.5.7