tests: add regression tests for xtables-translate

This test suite is intended to detect regressions in the translation
infrastructure. The script checks if ip[6]tables-translate produces the
expected output, otherwise it prints the wrong translation and the
expected one.

** Arguments

  --all     # Show also passed tests
  [test]    # Run only the specified test file

** Test files structure

Test files are located under extensions directory. Every file contains
tests about specific extension translations. A test file name must end
with ".txlate".

Inside the files, every single test is defined by two consecutive lines:
ip[6]tables-translate command and expected result. One blank line is left
between tests by convention.

e.g.

  $ cat extensions/libxt_cpu.txlate
  iptables-translate -A INPUT -p tcp --dport 80 -m cpu --cpu 0 -j ACCEPT
  nft add rule ip filter INPUT tcp dport 80 cpu 0 counter accept

  iptables-translate -A INPUT -p tcp --dport 80 -m cpu ! --cpu 1 -j ACCEPT
  nft add rule ip filter INPUT tcp dport 80 cpu != 1 counter accept

Signed-off-by: Pablo M. Bermudo Garay <pablombg@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/extensions/libxt_conntrack.txlate b/extensions/libxt_conntrack.txlate
new file mode 100644
index 00000000..e35d5ce8
--- /dev/null
+++ b/extensions/libxt_conntrack.txlate
@@ -0,0 +1,41 @@
+iptables-translate -t filter -A INPUT -m conntrack --ctstate NEW,RELATED -j ACCEPT
+nft add rule ip filter INPUT ct state new,related counter accept
+
+ip6tables-translate -t filter -A INPUT -m conntrack ! --ctstate NEW,RELATED -j ACCEPT
+nft add rule ip6 filter INPUT ct state != new,related counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctproto UDP -j ACCEPT
+nft add rule ip filter INPUT ct original protocol 17 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack ! --ctproto UDP -j ACCEPT
+nft add rule ip filter INPUT ct original protocol != 17 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctorigsrc 10.100.2.131 -j ACCEPT
+nft add rule ip filter INPUT ct original saddr 10.100.2.131 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctorigsrc 10.100.0.0/255.255.0.0 -j ACCEPT
+nft add rule ip filter INPUT ct original saddr 10.100.0.0/16 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctorigdst 10.100.2.131 -j ACCEPT
+nft add rule ip filter INPUT ct original daddr 10.100.2.131 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctreplsrc 10.100.2.131 -j ACCEPT
+nft add rule ip filter INPUT ct reply saddr 10.100.2.131 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctrepldst 10.100.2.131 -j ACCEPT
+nft add rule ip filter INPUT ct reply daddr 10.100.2.131 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctproto tcp --ctorigsrcport 443:444 -j ACCEPT
+nft add rule ip filter INPUT ct original protocol 6 ct original proto-src 443-444 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack ! --ctstatus CONFIRMED -j ACCEPT
+nft add rule ip filter INPUT ct status != confirmed counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctexpire 3 -j ACCEPT
+nft add rule ip filter INPUT ct expiration 3 counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctdir ORIGINAL -j ACCEPT
+nft add rule ip filter INPUT ct direction original counter accept
+
+iptables-translate -t filter -A INPUT -m conntrack --ctstate NEW --ctproto tcp --ctorigsrc 192.168.0.1 --ctorigdst 192.168.0.1 --ctreplsrc 192.168.0.1 --ctrepldst 192.168.0.1 --ctorigsrcport 12 --ctorigdstport 14 --ctreplsrcport 16 --ctrepldstport 18 --ctexpire 10 --ctstatus SEEN_REPLY --ctdir ORIGINAL -j ACCEPT
+nft add rule ip filter INPUT ct direction original ct original protocol 6 ct state new ct status seen-reply ct expiration 10 ct original saddr 192.168.0.1 ct original daddr 192.168.0.1 ct reply saddr 192.168.0.1 ct reply daddr 192.168.0.1 ct original proto-src 12 ct original proto-dst 14 ct reply proto-src 16 ct reply proto-dst 18 counter accept