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authorFlorian Westphal <fw@strlen.de>2016-09-15 17:28:00 +0200
committerFlorian Westphal <fw@strlen.de>2016-10-28 13:17:44 +0200
commit4a75ed32132d8e2292dd276f3ea7f4edec4f3d06 (patch)
tree1c095dc262a953ebb816d1770ccbdef1724e3e00 /tests
parentdfd92948a0a88a9f245e71c1cfb63ae670e6e7c1 (diff)
src: add fib expression
This adds the 'fib' expression which can be used to obtain the output interface from the route table based on either source or destination address of a packet. This can be used to e.g. add reverse path filtering: # drop if not coming from the same interface packet # arrived on # nft add rule x prerouting fib saddr . iif oif eq 0 drop # accept only if from eth0 # nft add rule x prerouting fib saddr . iif oif eq "eth0" accept # accept if from any valid interface # nft add rule x prerouting fib saddr oif accept Querying of address type is also supported. This can be used to e.g. only accept packets to addresses configured in the same interface: # fib daddr . iif type local Its also possible to use mark and verdict map, e.g.: # nft add rule x prerouting meta mark set 0xdead fib daddr . mark type vmap { blackhole : drop, prohibit : drop, unicast : accept } Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'tests')
-rw-r--r--tests/py/inet/fib.t14
-rw-r--r--tests/py/inet/fib.t.payload22
2 files changed, 36 insertions, 0 deletions
diff --git a/tests/py/inet/fib.t b/tests/py/inet/fib.t
new file mode 100644
index 00000000..9ee282ab
--- /dev/null
+++ b/tests/py/inet/fib.t
@@ -0,0 +1,14 @@
+:prerouting;type filter hook prerouting priority 0
+
+*ip;test-ip;prerouting
+*ip6;test-ip6;prerouting
+
+fib saddr . daddr oif lo;fail
+fib iif . oif . daddr oif lo;fail
+fib mark oif lo;fail
+fib saddr . iif oif ne 0;ok;fib saddr . iif oif != 0
+fib saddr . iif oifname "lo";ok
+
+fib daddr . iif type local;ok
+fib daddr . iif type vmap { blackhole : drop, prohibit : drop, unicast : accept };ok
+fib daddr . oif type local;fail
diff --git a/tests/py/inet/fib.t.payload b/tests/py/inet/fib.t.payload
new file mode 100644
index 00000000..f5258165
--- /dev/null
+++ b/tests/py/inet/fib.t.payload
@@ -0,0 +1,22 @@
+# fib saddr . iif oif ne 0
+ip test-ip prerouting
+ [ fib saddr . iif oif => reg 1 ]
+ [ cmp neq reg 1 0x00000000 ]
+
+# fib saddr . iif oifname "lo"
+ip test-ip prerouting
+ [ fib saddr . iif oifname => reg 1 ]
+ [ cmp eq reg 1 0x00006f6c 0x00000000 0x00000000 0x00000000 ]
+
+# fib daddr . iif type local
+ip test-ip prerouting
+ [ fib daddr . iif type => reg 1 ]
+ [ cmp eq reg 1 0x00000002 ]
+
+# fib daddr . iif type vmap { blackhole : drop, prohibit : drop, unicast : accept }
+__map%d test-ip b
+__map%d test-ip 0
+ element 00000006 : 0 [end] element 00000008 : 0 [end] element 00000001 : 0 [end]
+ip test-ip prerouting
+ [ fib daddr . iif type => reg 1 ]
+ [ lookup reg 1 set __map%d dreg 0 ]