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-rw-r--r--data/templates/firewall/nftables-nat.tmpl142
1 files changed, 62 insertions, 80 deletions
diff --git a/data/templates/firewall/nftables-nat.tmpl b/data/templates/firewall/nftables-nat.tmpl
index 286c21859..8769c2384 100644
--- a/data/templates/firewall/nftables-nat.tmpl
+++ b/data/templates/firewall/nftables-nat.tmpl
@@ -1,161 +1,143 @@
#!/usr/sbin/nft -f
-# Start with clean NAT table
-flush table nat
-
-{% if helper_functions == 'remove' %}
-{# NAT if going to be disabled - remove rules and targets from nftables #}
-
-{% set base_command = "delete rule ip raw" %}
-{{ base_command }} PREROUTING handle {{ pre_ct_ignore }}
-{{ base_command }} OUTPUT handle {{ out_ct_ignore }}
-{{ base_command }} PREROUTING handle {{ pre_ct_conntrack }}
-{{ base_command }} OUTPUT handle {{ out_ct_conntrack }}
-
-delete chain ip raw NAT_CONNTRACK
-
-{% elif helper_functions == 'add' %}
-{# NAT if enabled - add targets to nftables #}
-add chain ip raw NAT_CONNTRACK
-add rule ip raw NAT_CONNTRACK counter accept
-
-{% set base_command = "add rule ip raw" %}
-
-{{ base_command }} PREROUTING position {{ pre_ct_ignore }} counter jump VYATTA_CT_HELPER
-{{ base_command }} OUTPUT position {{ out_ct_ignore }} counter jump VYATTA_CT_HELPER
-{{ base_command }} PREROUTING position {{ pre_ct_conntrack }} counter jump NAT_CONNTRACK
-{{ base_command }} OUTPUT position {{ out_ct_conntrack }} counter jump NAT_CONNTRACK
-{% endif %}
-
-{% macro nat_rule(rule, chain) %}
+{% macro nat_rule(rule, config, chain) %}
{% set comment = "" %}
{% set base_log = "" %}
-
-{% set src_addr = "ip saddr " + rule.source_address if rule.source_address %}
-{% set dst_addr = "ip daddr " + rule.dest_address if rule.dest_address %}
-
+{% set src_addr = "ip saddr " + config.source.address if config.source is defined and config.source.address is defined and config.source.address is not none %}
+{% set dst_addr = "ip daddr " + config.destination.address if config.destination is defined and config.destination.address is defined and config.destination.address is not none %}
{# negated port groups need special treatment, move != in front of { } group #}
-{% if rule.source_port.startswith('!=') %}
-{% set src_port = "sport != { " + rule.source_port.replace('!=','') +" }" if rule.source_port %}
+{% if config.source is defined and config.source.port is defined and config.source.port is not none and config.source.port.startswith('!=') %}
+{% set src_port = "sport != { " + config.source.port.replace('!=','') +" }" %}
{% else %}
-{% set src_port = "sport { " + rule.source_port +" }" if rule.source_port %}
+{% set src_port = "sport { " + config.source.port +" }" if config.source is defined and config.source.port is defined and config.source.port is not none %}
{% endif %}
-
{# negated port groups need special treatment, move != in front of { } group #}
-{% if rule.dest_port.startswith('!=') %}
-{% set dst_port = "dport != { " + rule.dest_port.replace('!=','') +" }" if rule.dest_port %}
+{% if config.destination is defined and config.destination.port is defined and config.destination.port is not none and config.destination.port.startswith('!=') %}
+{% set dst_port = "dport != { " + config.destination.port.replace('!=','') +" }" %}
{% else %}
-{% set dst_port = "dport { " + rule.dest_port +" }" if rule.dest_port %}
+{% set dst_port = "dport { " + config.destination.port +" }" if config.destination is defined and config.destination.port is defined and config.destination.port is not none %}
{% endif %}
-
{% if chain == "PREROUTING" %}
-{% set comment = "DST-NAT-" + rule.number %}
-{% set base_log = "[NAT-DST-" + rule.number %}
-{% set interface = " iifname \"" + rule.interface_in + "\"" if rule.interface_in is defined and rule.interface_in != 'any' else '' %}
-{% set trns_addr = "dnat to " + rule.translation_address %}
-
+{% set comment = "DST-NAT-" + rule %}
+{% set base_log = "[NAT-DST-" + rule %}
+{% set interface = " iifname \"" + config.inbound_interface + "\"" if config.inbound_interface is defined and config.inbound_interface != 'any' else '' %}
+{% set trns_addr = "dnat to " + config.translation.address if config.translation is defined and config.translation.address is defined and config.translation.address is not none %}
{% elif chain == "POSTROUTING" %}
-{% set comment = "SRC-NAT-" + rule.number %}
-{% set base_log = "[NAT-SRC-" + rule.number %}
-{% set interface = " oifname \"" + rule.interface_out + "\"" if rule.interface_out is defined and rule.interface_out != 'any' else '' %}
-{% if rule.translation_address == 'masquerade' %}
-{% set trns_addr = rule.translation_address %}
-{% if rule.translation_port %}
+{% set comment = "SRC-NAT-" + rule %}
+{% set base_log = "[NAT-SRC-" + rule %}
+{% set interface = " oifname \"" + config.outbound_interface + "\"" if config.outbound_interface is defined and config.outbound_interface != 'any' else '' %}
+{% if config.translation is defined and config.translation.address is defined and config.translation.address == 'masquerade' %}
+{% set trns_addr = config.translation.address %}
+{% if config.translation.port is defined and config.translation.port is not none %}
{% set trns_addr = trns_addr + " to " %}
{% endif %}
{% else %}
-{% set trns_addr = "snat to " + rule.translation_address %}
+{% set trns_addr = "snat to " + config.translation.address if config.translation is defined and config.translation.address is defined and config.translation.address is not none %}
{% endif %}
{% endif %}
-{% set trns_port = ":" + rule.translation_port if rule.translation_port %}
-
-{% if rule.protocol == "tcp_udp" %}
+{% set trns_port = ":" + config.translation.port if config.translation is defined and config.translation.port is defined and config.translation.port is not none %}
+{# protocol has a default value thus it is always present #}
+{% if config.protocol == "tcp_udp" %}
{% set protocol = "tcp" %}
{% set comment = comment + " tcp_udp" %}
{% else %}
-{% set protocol = rule.protocol %}
+{% set protocol = config.protocol %}
{% endif %}
-
-{% if rule.log %}
-{% if rule.exclude %}
+{% if config.log is defined %}
+{% if config.exclude is defined %}
{% set log = base_log + "-EXCL]" %}
-{% elif rule.translation_address == 'masquerade' %}
+{% elif config.translation is defined and config.translation.address is defined and config.translation.address == 'masquerade' %}
{% set log = base_log + "-MASQ]" %}
{% else %}
{% set log = base_log + "]" %}
{% endif %}
{% endif %}
-
-{% if rule.exclude %}
+{% if config.exclude is defined %}
{# rule has been marked as "exclude" thus we simply return here #}
{% set trns_addr = "return" %}
{% set trns_port = "" %}
{% endif %}
-
{% set output = "add rule ip nat " + chain + interface %}
-
{% if protocol != "all" %}
{% set output = output + " ip protocol " + protocol %}
{% endif %}
-
{% if src_addr %}
{% set output = output + " " + src_addr %}
{% endif %}
{% if src_port %}
{% set output = output + " " + protocol + " " + src_port %}
{% endif %}
-
{% if dst_addr %}
{% set output = output + " " + dst_addr %}
{% endif %}
{% if dst_port %}
{% set output = output + " " + protocol + " " + dst_port %}
{% endif %}
-
{# Count packets #}
{% set output = output + " counter" %}
-
{# Special handling of log option, we must repeat the entire rule before the #}
{# NAT translation options are added, this is essential #}
{% if log %}
{% set log_output = output + " log prefix \"" + log + "\" comment \"" + comment + "\"" %}
{% endif %}
-
{% if trns_addr %}
{% set output = output + " " + trns_addr %}
{% endif %}
-
{% if trns_port %}
{# Do not add a whitespace here, translation port must be directly added after IP address #}
{# e.g. 192.0.2.10:3389 #}
{% set output = output + trns_port %}
{% endif %}
-
{% if comment %}
{% set output = output + " comment \"" + comment + "\"" %}
{% endif %}
-
{{ log_output if log_output }}
{{ output }}
-
{# Special handling if protocol is tcp_udp, we must repeat the entire rule with udp as protocol #}
-{% if rule.protocol == "tcp_udp" %}
+{% if config.protocol == "tcp_udp" %}
{# Beware of trailing whitespace, without it the comment tcp_udp will be changed to udp_udp #}
{{ log_output | replace("tcp ", "udp ") if log_output }}
{{ output | replace("tcp ", "udp ") }}
{% endif %}
{% endmacro %}
+# Start with clean NAT table
+flush table nat
+{% if helper_functions == 'remove' %}
+{# NAT if going to be disabled - remove rules and targets from nftables #}
+{% set base_command = "delete rule ip raw" %}
+{{ base_command }} PREROUTING handle {{ pre_ct_ignore }}
+{{ base_command }} OUTPUT handle {{ out_ct_ignore }}
+{{ base_command }} PREROUTING handle {{ pre_ct_conntrack }}
+{{ base_command }} OUTPUT handle {{ out_ct_conntrack }}
+
+delete chain ip raw NAT_CONNTRACK
+
+{% elif helper_functions == 'add' %}
+{# NAT if enabled - add targets to nftables #}
+add chain ip raw NAT_CONNTRACK
+add rule ip raw NAT_CONNTRACK counter accept
+{% set base_command = "add rule ip raw" %}
+{{ base_command }} PREROUTING position {{ pre_ct_ignore }} counter jump VYATTA_CT_HELPER
+{{ base_command }} OUTPUT position {{ out_ct_ignore }} counter jump VYATTA_CT_HELPER
+{{ base_command }} PREROUTING position {{ pre_ct_conntrack }} counter jump NAT_CONNTRACK
+{{ base_command }} OUTPUT position {{ out_ct_conntrack }} counter jump NAT_CONNTRACK
+{% endif %}
+
#
# Destination NAT rules build up here
#
-{% for rule in destination if not rule.disabled -%}
-{{ nat_rule(rule, 'PREROUTING') }}
-{% endfor %}
+{% if destination is defined and destination.rule is defined and destination.rule is not none %}
+{% for rule, config in destination.rule.items() if config.disable is not defined %}
+{{ nat_rule(rule, config, 'PREROUTING') }}
+{% endfor %}
+{% endif %}
#
# Source NAT rules build up here
#
-{% for rule in source if not rule.disabled -%}
-{{ nat_rule(rule, 'POSTROUTING') }}
-{% endfor %}
+{% if source is defined and source.rule is defined and source.rule is not none %}
+{% for rule, config in source.rule.items() if config.disable is not defined %}
+{{ nat_rule(rule, config, 'POSTROUTING') }}
+{% endfor %}
+{% endif %}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 14:15:11 +0000