func TestEmpty(t *testing.T) {
bld := filter.NewBuilder()
flt := bld.Build()
if flt.Len() != 0 {
t.Fatalf("Len mismatch: %d", flt.Len())
}
flt.Cleanup()
}
func TestARP(t *testing.T) {
arp := filter.NewBuilder().
LD(filter.Half, filter.ABS, 12).
JEQ(filter.Const, "", "fail", 0x806).
RET(filter.Const, 0x40000).
Label("fail").
RET(filter.Const, 0x0).
Build()
if arp.String() != test_arp {
t.Fatalf("Program mismatch: %s", arp.String())
}
}
func ExampleBuilder() {
// Build a filter to match ARP packets on top of Ethernet
flt := filter.NewBuilder().
LD(filter.Half, filter.ABS, 12).
JEQ(filter.Const, "", "fail", 0x806).
RET(filter.Const, 0x40000).
Label("fail").
RET(filter.Const, 0x0).
Build()
if flt.Match([]byte("random data")) {
log.Println("MATCH!!!")
}
}
func TestDNS(t *testing.T) {
dns := filter.NewBuilder().
LD(filter.Word, filter.IMM, 20).
LDX(filter.Byte, filter.MSH, 0).
ADD(filter.Index, 0).
TAX().
Label("lb_0").
LD(filter.Word, filter.IND, 0).
JEQ(filter.Const, "", "lb_1", 0x07657861).
LD(filter.Word, filter.IND, 4).
JEQ(filter.Const, "", "lb_1", 0x6d706c65).
LD(filter.Word, filter.IND, 8).
JEQ(filter.Const, "", "lb_1", 0x03636f6d).
LD(filter.Byte, filter.IND, 12).
JEQ(filter.Const, "", "lb_1", 0x00).
RET(filter.Const, 1).
Label("lb_1").
RET(filter.Const, 0).
Build()
if dns.String() != test_dns {
t.Fatalf("Program mismatch: %s", dns.String())
}
}