@@ -4461,6 +4461,10 @@ relational_expr : expr /* implicit */ rhs_expr
{
$$ = relational_expr_alloc(&@2, $2, $1, $3);
}
+ | expr relational_op list_rhs_expr
+ {
+ $$ = relational_expr_alloc(&@2, $2, $1, $3);
+ }
;
list_rhs_expr : basic_rhs_expr COMMA basic_rhs_expr
@@ -81,6 +81,7 @@ tcp flags & (syn|fin) == (syn|fin);ok;tcp flags & (fin | syn) == fin | syn
tcp flags & (fin | syn | rst | psh | ack | urg | ecn | cwr) == fin | syn | rst | psh | ack | urg | ecn | cwr;ok;tcp flags == 0xff
tcp flags { syn, syn | ack };ok
tcp flags & (fin | syn | rst | psh | ack | urg) == { fin, ack, psh | ack, fin | psh | ack };ok
+tcp flags ! fin,rst;ok
tcp window 22222;ok
tcp window 22;ok
@@ -1730,3 +1730,19 @@
}
}
]
+
+# tcp flags ! fin,rst
+[
+ {
+ "match": {
+ "op": "!",
+ "left": {
+ "payload": {
+ "protocol": "tcp",
+ "field": "flags"
+ }
+ },
+ "right": ["fin", "rst"]
+ }
+ }
+]
@@ -701,3 +701,10 @@ inet
[ payload load 1b @ transport header + 13 => reg 1 ]
[ lookup reg 1 set __set%d ]
+# tcp flags ! fin,rst
+inet
+ [ meta load l4proto => reg 1 ]
+ [ cmp eq reg 1 0x00000006 ]
+ [ payload load 1b @ transport header + 13 => reg 1 ]
+ [ bitwise reg 1 = ( reg 1 & 0x00000005 ) ^ 0x00000000 ]
+ [ cmp eq reg 1 0x00000000 ]
Complete e6c32b2fa0b8 ("src: add negation match on singleton bitmask value") which was missing comma-separated list of flags: tcp flags and fin,rst == 0 which allows to check for the packet whose fin and rst bits are unset: # nft add rule x y tcp flags not fin,rst counter Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> --- src/parser_bison.y | 4 ++++ tests/py/inet/tcp.t | 1 + tests/py/inet/tcp.t.json | 16 ++++++++++++++++ tests/py/inet/tcp.t.payload | 7 +++++++ 4 files changed, 28 insertions(+)