Ensure that NOTRACK rules end up in the appropriate chains, depending on
   the src and dest options.
   
   -- Testcase --
   {%
           include("./root/usr/share/firewall4/main.uc", {
                   getenv: function(varname) {
                           switch (varname) {
                           case 'ACTION':
                                  return 'print';
                          }
                  }
          })
  %}
  -- End --
  
  -- File uci/helpers.json --
  {}
  -- End --
  
  -- File fs/open~_sys_class_net_eth0_flags.txt --
  0x1103
  -- End --
  
  -- File fs/open~_sys_class_net_lo_flags.txt --
  0x9
  -- End --
  
  -- File uci/firewall.json --
  {
          "zone": [
                  {
                          "name": "zone1",
                          "device": [ "eth0" ],
                          "auto_helper": 0
                  },
                  {
                          "name": "zone2",
                          "device": [ "lo" ],
                          "auto_helper": 0
                  },
                  {
                          "name": "zone3",
                          "subnet": [ "127.0.0.1/8", "::1/128" ],
                          "auto_helper": 0
                  }
          ],
          "rule": [
                  {
                          ".description": "An ordinary notrack rule should end up in the raw_prerouting chain",
                          "name": "Notrack rule #1",
                          "src": "zone1",
                          "target": "NOTRACK"
                  },
                  {
                          ".description": "A notrack rule with loopback source device should end up in the raw_output chain",
                          "name": "Notrack rule #2",
                          "src": "zone2",
                          "target": "NOTRACK"
                  },
                  {
                          ".description": "A notrack rule with loopback source address should end up in the raw_output chain",
                          "name": "Notrack rule #3",
                          "src": "zone3",
                          "target": "NOTRACK"
                  }
          ]
  }
  -- End --
  
  -- Expect stdout --
  table inet fw4
  flush table inet fw4
  
  table inet fw4 {
          #
          # Defines
          #
  
          define zone1_devices = { "eth0" }
          define zone1_subnets = {  }
  
          define zone2_devices = { "lo" }
          define zone2_subnets = {  }
  
          define zone3_devices = {  }
          define zone3_subnets = { 127.0.0.0/8, ::1 }
  
  
          #
          # User includes
          #
  
          include "/etc/nftables.d/*.nft"
  
  
          #
          # Filter rules
          #
 
         chain input {
                 type filter hook input priority filter; policy drop;
 
                 iif "lo" accept comment "!fw4: Accept traffic from loopback"
 
                 ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
                 iifname "eth0" jump input_zone1 comment "!fw4: Handle zone1 IPv4/IPv6 input traffic"
                 iifname "lo" jump input_zone2 comment "!fw4: Handle zone2 IPv4/IPv6 input traffic"
                 meta nfproto ipv4 ip saddr 127.0.0.0/8 jump input_zone3 comment "!fw4: Handle zone3 IPv4 input traffic"
                 meta nfproto ipv6 ip6 saddr ::1 jump input_zone3 comment "!fw4: Handle zone3 IPv6 input traffic"
         }
 
         chain forward {
                 type filter hook forward priority filter; policy drop;
 
                 ct state vmap { established : accept, related : accept } comment "!fw4: Handle forwarded flows"
                 iifname "eth0" jump forward_zone1 comment "!fw4: Handle zone1 IPv4/IPv6 forward traffic"
                 iifname "lo" jump forward_zone2 comment "!fw4: Handle zone2 IPv4/IPv6 forward traffic"
                 meta nfproto ipv4 ip saddr 127.0.0.0/8 jump forward_zone3 comment "!fw4: Handle zone3 IPv4 forward traffic"
                 meta nfproto ipv6 ip6 saddr ::1 jump forward_zone3 comment "!fw4: Handle zone3 IPv6 forward traffic"
         }
 
         chain output {
                 type filter hook output priority filter; policy drop;
 
                 oif "lo" accept comment "!fw4: Accept traffic towards loopback"
 
                 ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
                 oifname "eth0" jump output_zone1 comment "!fw4: Handle zone1 IPv4/IPv6 output traffic"
                 oifname "lo" jump output_zone2 comment "!fw4: Handle zone2 IPv4/IPv6 output traffic"
                 meta nfproto ipv4 ip daddr 127.0.0.0/8 jump output_zone3 comment "!fw4: Handle zone3 IPv4 output traffic"
                 meta nfproto ipv6 ip6 daddr ::1 jump output_zone3 comment "!fw4: Handle zone3 IPv6 output traffic"
         }
 
         chain prerouting {
                 type filter hook prerouting priority filter; policy accept;
         }
 
         chain handle_reject {
                 meta l4proto tcp reject with tcp reset comment "!fw4: Reject TCP traffic"
                 reject with icmpx type port-unreachable comment "!fw4: Reject any other traffic"
         }
 
         chain input_zone1 {
                 jump drop_from_zone1
         }
 
         chain output_zone1 {
                 jump drop_to_zone1
         }
 
         chain forward_zone1 {
                 jump drop_to_zone1
         }
 
         chain drop_from_zone1 {
                 iifname "eth0" counter drop comment "!fw4: drop zone1 IPv4/IPv6 traffic"
         }
 
         chain drop_to_zone1 {
                 oifname "eth0" counter drop comment "!fw4: drop zone1 IPv4/IPv6 traffic"
         }
 
         chain input_zone2 {
                 jump drop_from_zone2
         }
 
         chain output_zone2 {
                 jump drop_to_zone2
         }
 
         chain forward_zone2 {
                 jump drop_to_zone2
         }
 
         chain drop_from_zone2 {
                 iifname "lo" counter drop comment "!fw4: drop zone2 IPv4/IPv6 traffic"
         }
 
         chain drop_to_zone2 {
                 oifname "lo" counter drop comment "!fw4: drop zone2 IPv4/IPv6 traffic"
         }
 
         chain input_zone3 {
                 jump drop_from_zone3
         }
 
         chain output_zone3 {
                 jump drop_to_zone3
         }
 
         chain forward_zone3 {
                 jump drop_to_zone3
         }
 
         chain drop_from_zone3 {
                 meta nfproto ipv4 ip saddr 127.0.0.0/8 counter drop comment "!fw4: drop zone3 IPv4 traffic"
                 meta nfproto ipv6 ip6 saddr ::1 counter drop comment "!fw4: drop zone3 IPv6 traffic"
         }
 
         chain drop_to_zone3 {
                 meta nfproto ipv4 ip daddr 127.0.0.0/8 counter drop comment "!fw4: drop zone3 IPv4 traffic"
                 meta nfproto ipv6 ip6 daddr ::1 counter drop comment "!fw4: drop zone3 IPv6 traffic"
         }
 
 
         #
         # NAT rules
         #
 
         chain dstnat {
                 type nat hook prerouting priority dstnat; policy accept;
         }
 
         chain srcnat {
                 type nat hook postrouting priority srcnat; policy accept;
         }
 
 
         #
         # Raw rules (notrack)
         #
 
         chain raw_prerouting {
                 type filter hook prerouting priority raw; policy accept;
                 iifname "eth0" jump notrack_zone1 comment "!fw4: Handle zone1 IPv4/IPv6 notrack traffic"
         }
 
         chain raw_output {
                 type filter hook output priority raw; policy accept;
                 iifname "lo" jump notrack_zone2 comment "!fw4: Handle zone2 IPv4/IPv6 notrack traffic"
                 meta nfproto ipv4 ip saddr 127.0.0.0/8 jump notrack_zone3 comment "!fw4: Handle zone3 IPv4 notrack traffic"
                 meta nfproto ipv6 ip6 saddr ::1 jump notrack_zone3 comment "!fw4: Handle zone3 IPv6 notrack traffic"
         }
 
         chain notrack_zone1 {
                 meta l4proto tcp counter notrack comment "!fw4: Notrack rule #1"
                 meta l4proto udp counter notrack comment "!fw4: Notrack rule #1"
         }
 
         chain notrack_zone2 {
                 meta l4proto tcp counter notrack comment "!fw4: Notrack rule #2"
                 meta l4proto udp counter notrack comment "!fw4: Notrack rule #2"
         }
 
         chain notrack_zone3 {
                 meta l4proto tcp counter notrack comment "!fw4: Notrack rule #3"
                 meta l4proto udp counter notrack comment "!fw4: Notrack rule #3"
         }
 
 
         #
         # Mangle rules
         #
 
         chain mangle_prerouting {
                 type filter hook prerouting priority mangle; policy accept;
         }
 
         chain mangle_postrouting {
                 type filter hook postrouting priority mangle; policy accept;
         }
 
         chain mangle_input {
                 type filter hook input priority mangle; policy accept;
         }
 
         chain mangle_output {
                 type route hook output priority mangle; policy accept;
         }
 
         chain mangle_forward {
                 type filter hook forward priority mangle; policy accept;
         }
 }
 -- End --

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