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|
Testing that zones sharing a name no longer render duplicate nftables
defines and chains, which nft rejects wholesale. The first zone of a given
name wins and later ones are skipped with a diagnostic; a zone declared via
ubus never displaces a uci zone of the same name.
-- 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_br-lan_flags.txt --
0x1103
-- End --
-- File fs/open~_sys_class_net_pppoe-wan_flags.txt --
0x1103
-- End --
-- File ubus/network.interface~dump.json --
{
"interface": [
{
"interface": "lan",
"up": true,
"l3_device": "br-lan",
"proto": "static",
"device": "br-lan",
"ipv4-address": [ { "address": "192.168.1.1", "mask": 24 } ],
"data": {}
},
{
"interface": "wan",
"up": true,
"l3_device": "pppoe-wan",
"proto": "pppoe",
"device": "eth1",
"ipv4-address": [ { "address": "10.11.12.194", "mask": 24 } ],
"data": {}
}
]
}
-- End --
-- File ubus/service~get_data~type-firewall.json --
{
"svc1": {
"firewall": [
{
"type": "zone",
"name": "czdup",
"subnet": [ "10.99.0.0/24" ]
}
]
},
"svc2": {
"firewall": [
{
"type": "zone",
"name": "czdup",
"subnet": [ "10.98.0.0/24" ]
}
]
},
"svc3": {
"firewall": [
{
"type": "zone",
"name": "wan",
"input": "ACCEPT"
}
]
}
}
-- End --
-- File uci/firewall.json --
{
"defaults": [
{
"input": "ACCEPT",
"output": "ACCEPT",
"forward": "REJECT"
}
],
"zone": [
{
"name": "lan",
"input": "ACCEPT",
"output": "ACCEPT",
"forward": "ACCEPT",
"network": "lan"
},
{
"name": "wan",
"input": "REJECT",
"output": "ACCEPT",
"forward": "REJECT",
"masq": "1",
"network": "wan"
},
{
"name": "lan",
"input": "REJECT",
"output": "REJECT",
"forward": "REJECT"
}
]
}
-- End --
-- Expect stderr --
[!] ubus:svc2 zone (czdup) has a duplicate name, ignoring section
[!] ubus:svc3 zone (wan) duplicates a uci zone, ignoring section
[!] Section @zone[2] (lan) has a duplicate name, ignoring section
-- End --
-- Expect stdout --
table inet fw4
flush table inet fw4
table inet fw4 {
#
# Defines
#
define czdup_devices = { }
define czdup_subnets = { 10.99.0.0/24 }
define lan_devices = { "br-lan" }
define lan_subnets = { 192.168.1.0/24 }
define wan_devices = { "pppoe-wan" }
define wan_subnets = { 10.11.12.0/24 }
#
# User includes
#
include "/etc/nftables.d/*.nft"
#
# Filter rules
#
chain input {
type filter hook input priority filter; policy accept;
iif "lo" accept comment "!fw4: Accept traffic from loopback"
ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
meta nfproto ipv4 ip saddr 10.99.0.0/24 jump input_czdup comment "!fw4: Handle czdup IPv4 input traffic"
iifname "br-lan" jump input_lan comment "!fw4: Handle lan IPv4/IPv6 input traffic"
iifname "pppoe-wan" jump input_wan comment "!fw4: Handle wan 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"
meta nfproto ipv4 ip saddr 10.99.0.0/24 jump forward_czdup comment "!fw4: Handle czdup IPv4 forward traffic"
iifname "br-lan" jump forward_lan comment "!fw4: Handle lan IPv4/IPv6 forward traffic"
iifname "pppoe-wan" jump forward_wan comment "!fw4: Handle wan IPv4/IPv6 forward traffic"
jump handle_reject
}
chain output {
type filter hook output priority filter; policy accept;
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
meta nfproto ipv4 ip daddr 10.99.0.0/24 jump output_czdup comment "!fw4: Handle czdup IPv4 output traffic"
oifname "br-lan" jump output_lan comment "!fw4: Handle lan IPv4/IPv6 output traffic"
oifname "pppoe-wan" jump output_wan comment "!fw4: Handle wan IPv4/IPv6 output traffic"
}
chain prerouting {
type filter hook prerouting priority filter; policy accept;
meta nfproto ipv4 ip saddr 10.99.0.0/24 jump helper_czdup comment "!fw4: Handle czdup IPv4 helper assignment"
iifname "br-lan" jump helper_lan comment "!fw4: Handle lan IPv4/IPv6 helper assignment"
}
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_czdup {
jump drop_from_czdup
}
chain output_czdup {
jump drop_to_czdup
}
chain forward_czdup {
jump drop_to_czdup
}
chain helper_czdup {
}
chain drop_from_czdup {
meta nfproto ipv4 ip saddr 10.99.0.0/24 counter drop comment "!fw4: drop czdup IPv4 traffic"
}
chain drop_to_czdup {
meta nfproto ipv4 ip daddr 10.99.0.0/24 counter drop comment "!fw4: drop czdup IPv4 traffic"
}
chain input_lan {
jump accept_from_lan
}
chain output_lan {
jump accept_to_lan
}
chain forward_lan {
jump accept_to_lan
}
chain helper_lan {
}
chain accept_from_lan {
iifname "br-lan" counter accept comment "!fw4: accept lan IPv4/IPv6 traffic"
}
chain accept_to_lan {
oifname "br-lan" counter accept comment "!fw4: accept lan IPv4/IPv6 traffic"
}
chain input_wan {
jump reject_from_wan
}
chain output_wan {
jump accept_to_wan
}
chain forward_wan {
jump reject_to_wan
}
chain accept_to_wan {
meta nfproto ipv4 oifname "pppoe-wan" ct state invalid counter drop comment "!fw4: Prevent NAT leakage"
oifname "pppoe-wan" counter accept comment "!fw4: accept wan IPv4/IPv6 traffic"
}
chain reject_from_wan {
iifname "pppoe-wan" counter jump handle_reject comment "!fw4: reject wan IPv4/IPv6 traffic"
}
chain reject_to_wan {
oifname "pppoe-wan" counter jump handle_reject comment "!fw4: reject wan 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 "pppoe-wan" jump srcnat_wan comment "!fw4: Handle wan IPv4/IPv6 srcnat traffic"
}
chain srcnat_wan {
meta nfproto ipv4 masquerade comment "!fw4: Masquerade IPv4 wan 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 --
|
