From cc2ad34ce61e205454c4676a5bde77629d463964 Mon Sep 17 00:00:00 2001 From: Christian Poessinger Date: Tue, 12 May 2020 17:43:03 +0200 Subject: nat: T2198: make use of jmespath when walking nftables JSON output --- data/templates/firewall/nftables-nat.tmpl | 91 ++++++++++++++----------------- 1 file changed, 42 insertions(+), 49 deletions(-) (limited to 'data/templates') diff --git a/data/templates/firewall/nftables-nat.tmpl b/data/templates/firewall/nftables-nat.tmpl index 671cd0920..161ef27fb 100644 --- a/data/templates/firewall/nftables-nat.tmpl +++ b/data/templates/firewall/nftables-nat.tmpl @@ -1,62 +1,55 @@ #!/usr/sbin/nft -f -# Start with a "clean" NAT table +# Start with clean NAT table flush table nat -{% for rule in init_deinit -%} -# Add or remove conntrack helper rules for NAT operation- -{{ rule }} -{% endfor %} - - -{% if deleted %} -# NAT if going to be disabled - remove rules and targets from nftables -delete rule ip raw PREROUTING handle {{ pre_ct_ignore }} -delete rule ip raw PREROUTING handle {{ pre_ct_conntrack }} -delete rule ip raw OUTPUT handle {{ out_ct_ignore }} -delete rule ip raw OUTPUT handle {{ out_ct_conntrack }} - -delete chain ip raw NAT_CONNTRACK - -{% else %} -# NAT if enabled - add targets to nftables -add chain ip raw NAT_CONNTRACK -add rule ip raw NAT_CONNTRACK counter accept - -add rule ip raw PREROUTING position {{ pre_ct_ignore }} counter jump VYATTA_CT_HELPER -add rule ip raw PREROUTING position {{ pre_ct_conntrack }} counter jump NAT_CONNTRACK -add rule ip raw OUTPUT position {{ out_ct_ignore }} counter jump VYATTA_CT_HELPER -add rule ip raw OUTPUT position {{ out_ct_conntrack }} counter jump NAT_CONNTRACK +{% if helper_functions == 'remove' %} + # NAT if going to be disabled - remove rules and targets from nftables + delete rule ip raw PREROUTING handle {{ pre_ct_ignore }} + delete rule ip raw PREROUTING handle {{ pre_ct_conntrack }} + delete rule ip raw OUTPUT handle {{ out_ct_ignore }} + delete rule ip raw 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 + + add rule ip raw PREROUTING position {{ pre_ct_ignore }} counter jump VYATTA_CT_HELPER + add rule ip raw PREROUTING position {{ pre_ct_conntrack }} counter jump NAT_CONNTRACK + add rule ip raw OUTPUT position {{ out_ct_ignore }} counter jump VYATTA_CT_HELPER + add rule ip raw OUTPUT position {{ out_ct_conntrack }} counter jump NAT_CONNTRACK {% endif %} {% for r in destination -%} -{% if r.protocol == 'tcp_udp' %} -{# Special handling for protocol tcp_udp which is represented as two individual rules #} -add rule ip nat PREROUTING iifname "{{ r.interface_in }}" tcp dport { {{ r.dest_port }} } counter dnat to {{ r.translation_address }}{{ ":" + r.translation_port if r.translation_port }} comment "DST-NAT-{{ r.number }} tcp_udp" -add rule ip nat PREROUTING iifname "{{ r.interface_in }}" udp dport { {{ r.dest_port }} } counter dnat to {{ r.translation_address }}{{ ":" + r.translation_port if r.translation_port }} comment "DST-NAT-{{ r.number }} tcp_udp" -{% else %} -add rule ip nat PREROUTING iifname "{{ r.interface_in }}" {{ r.protocol }} dport { {{ r.dest_port }} } counter dnat to {{ r.translation_address }}{{ ":" + r.translation_port if r.translation_port }} comment "DST-NAT-{{ r.number }}" -{% endif %} +{% if r.protocol == 'tcp_udp' %} + {# Special handling for protocol tcp_udp which is represented as two individual rules #} + add rule ip nat PREROUTING iifname "{{ r.interface_in }}" tcp dport { {{ r.dest_port }} } counter dnat to {{ r.translation_address }}{{ ":" + r.translation_port if r.translation_port }} comment "DST-NAT-{{ r.number }} tcp_udp" + add rule ip nat PREROUTING iifname "{{ r.interface_in }}" udp dport { {{ r.dest_port }} } counter dnat to {{ r.translation_address }}{{ ":" + r.translation_port if r.translation_port }} comment "DST-NAT-{{ r.number }} tcp_udp" +{% else %} + add rule ip nat PREROUTING iifname "{{ r.interface_in }}" {{ r.protocol }} dport { {{ r.dest_port }} } counter dnat to {{ r.translation_address }}{{ ":" + r.translation_port if r.translation_port }} comment "DST-NAT-{{ r.number }}" +{% endif %} {% endfor %} {% for r in source -%} -{% if r.log %} -{% if r.exclude %} -{% set value = 'EXCL' %} -{% elif r.translation_address == 'masquerade' %} -{% set value = 'MASQ' %} -{% endif %} -add rule ip nat POSTROUTING oifname "{{ r.interface_out }}" ip saddr {{ r.source_address }} counter log prefix "[NAT-SRC-{{ r.number }}-{{ value }}]" comment "SRC-NAT-{{ r.number }}" -{% endif %} - -{% if r.exclude %} -{% set value = 'return' %} -{% elif r.translation_address == 'masquerade' %} -{% set value = 'masquerade' %} -{% else %} -{% set value = 'snat to ' + r.translation_address %} -{% endif %} -add rule ip nat POSTROUTING oifname "{{ r.interface_out }}" ip saddr {{ r.source_address }} counter {{ value }} comment "SRC-NAT-{{ r.number }}" +{% if r.log %} +{% if r.exclude %} +{% set value = 'EXCL' %} +{% elif r.translation_address == 'masquerade' %} +{% set value = 'MASQ' %} +{% endif %} + add rule ip nat POSTROUTING oifname "{{ r.interface_out }}" ip saddr {{ r.source_address }} counter log prefix "[NAT-SRC-{{ r.number }}-{{ value }}]" comment "SRC-NAT-{{ r.number }}" +{% endif %} + +{% if r.exclude %} +{% set value = 'return' %} +{% elif r.translation_address == 'masquerade' %} +{% set value = 'masquerade' %} +{% else %} +{% set value = 'snat to ' + r.translation_address %} +{% endif %} + add rule ip nat POSTROUTING oifname "{{ r.interface_out }}" ip saddr {{ r.source_address }} counter {{ value }} comment "SRC-NAT-{{ r.number }}" {% endfor %} -- cgit v1.2.3