Testing that zone masquerading is properly mapped to chains.
   
   -- 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_zone1_flags.txt --
  0x1103
  -- End --
  
  -- File fs/open~_sys_class_net_zone2_flags.txt --
  0x1103
  -- End --
  
  -- File fs/open~_sys_class_net_zone3_flags.txt --
  0x1103
  -- End --
  
  -- File uci/firewall.json --
  {
          "zone": [
                  {
                          ".description": "Setting masq to true should emit an IPv4 masquerading rule and inhibit default helper assignment",
                          "name": "test1",
                          "input": "ACCEPT",
                          "output": "ACCEPT",
                          "forward": "ACCEPT",
                          "device": "zone1",
                          "masq": "1"
                  },
                  {
                          ".description": "Setting masq6 to true should emit an IPv6 masquerading rule and inhibit default helper assignment",
                          "name": "test2",
                          "input": "DROP",
                          "output": "DROP",
                          "forward": "DROP",
                          "device": "zone2",
                          "masq6": "1"
                  },
                  {
                          ".description": "Setting both masq and masq6 should emit IPv4 and IPv6 masquerading and inhibit default helper assignment",
                          "name": "test3",
                          "input": "REJECT",
                          "output": "REJECT",
                          "forward": "REJECT",
                          "device": "zone3",
                          "masq": "1",
                          "masq6": "1"
                  }
          ]
  }
  -- End --
  
  -- Expect stdout --
  table inet fw4
  flush table inet fw4
  
  table inet fw4 {
          #
          # Defines
          #
  
          define test1_devices = { "zone1" }
          define test1_subnets = {  }
  
          define test2_devices = { "zone2" }
          define test2_subnets = {  }
  
          define test3_devices = { "zone3" }
          define test3_subnets = {  }
  
  
          #
          # 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 "zone1" jump input_test1 comment "!fw4: Handle test1 IPv4/IPv6 input traffic"
                 iifname "zone2" jump input_test2 comment "!fw4: Handle test2 IPv4/IPv6 input traffic"
                 iifname "zone3" jump input_test3 comment "!fw4: Handle test3 IPv4/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 "zone1" jump forward_test1 comment "!fw4: Handle test1 IPv4/IPv6 forward traffic"
                 iifname "zone2" jump forward_test2 comment "!fw4: Handle test2 IPv4/IPv6 forward traffic"
                 iifname "zone3" jump forward_test3 comment "!fw4: Handle test3 IPv4/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 "zone1" jump output_test1 comment "!fw4: Handle test1 IPv4/IPv6 output traffic"
                 oifname "zone2" jump output_test2 comment "!fw4: Handle test2 IPv4/IPv6 output traffic"
                 oifname "zone3" jump output_test3 comment "!fw4: Handle test3 IPv4/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_test1 {
                 jump accept_from_test1
         }
 
         chain output_test1 {
                 jump accept_to_test1
         }
 
         chain forward_test1 {
                 jump accept_to_test1
         }
 
         chain accept_from_test1 {
                 iifname "zone1" counter accept comment "!fw4: accept test1 IPv4/IPv6 traffic"
         }
 
         chain accept_to_test1 {
                 meta nfproto ipv4 oifname "zone1" ct state invalid counter drop comment "!fw4: Prevent NAT leakage"
                 oifname "zone1" counter accept comment "!fw4: accept test1 IPv4/IPv6 traffic"
         }
 
         chain input_test2 {
                 jump drop_from_test2
         }
 
         chain output_test2 {
                 jump drop_to_test2
         }
 
         chain forward_test2 {
                 jump drop_to_test2
         }
 
         chain drop_from_test2 {
                 iifname "zone2" counter drop comment "!fw4: drop test2 IPv4/IPv6 traffic"
         }
 
         chain drop_to_test2 {
                 oifname "zone2" counter drop comment "!fw4: drop test2 IPv4/IPv6 traffic"
         }
 
         chain input_test3 {
                 jump reject_from_test3
         }
 
         chain output_test3 {
                 jump reject_to_test3
         }
 
         chain forward_test3 {
                 jump reject_to_test3
         }
 
         chain reject_from_test3 {
                 iifname "zone3" counter jump handle_reject comment "!fw4: reject test3 IPv4/IPv6 traffic"
         }
 
         chain reject_to_test3 {
                 oifname "zone3" counter jump handle_reject comment "!fw4: reject test3 IPv4/IPv6 traffic"
         }
 
 
         #
         # NAT rules
         #
 
         chain dstnat {
                 type nat hook prerouting priority dstnat; policy accept;
         }
 
         chain srcnat {
                 type nat hook postrouting priority srcnat; policy accept;
                 oifname "zone1" jump srcnat_test1 comment "!fw4: Handle test1 IPv4/IPv6 srcnat traffic"
                 oifname "zone2" jump srcnat_test2 comment "!fw4: Handle test2 IPv4/IPv6 srcnat traffic"
                 oifname "zone3" jump srcnat_test3 comment "!fw4: Handle test3 IPv4/IPv6 srcnat traffic"
         }
 
         chain srcnat_test1 {
                 meta nfproto ipv4 masquerade comment "!fw4: Masquerade IPv4 test1 traffic"
         }
 
         chain srcnat_test2 {
                 meta nfproto ipv6 masquerade comment "!fw4: Masquerade IPv6 test2 traffic"
         }
 
         chain srcnat_test3 {
                 meta nfproto ipv4 masquerade comment "!fw4: Masquerade IPv4 test3 traffic"
                 meta nfproto ipv6 masquerade comment "!fw4: Masquerade IPv6 test3 traffic"
         }
 
 
         #
         # Raw rules (notrack)
         #
 
         chain raw_prerouting {
                 type filter hook prerouting priority raw; policy accept;
         }
 
         chain raw_output {
                 type filter hook output priority raw; policy accept;
         }
 
 
         #
         # 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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