// Compile the given tcpdump-like expression to a BPF filter.
func Compile(filter string, link_type packet.Type, optimize bool) (*Filter, error) {
var do_optimize int
if optimize {
do_optimize = 1
} else {
do_optimize = 0
}
f := &Filter{}
filter_str := C.CString(filter)
defer C.free(unsafe.Pointer(filter_str))
pcap_type := link_type.ToLinkType()
err := C.pcap_compile_nopcap(
C.int(0x7fff), C.int(pcap_type),
(*C.struct_bpf_program)(f.Program()),
filter_str, C.int(do_optimize), 0xffffffff,
)
if err < 0 {
return nil, fmt.Errorf("Could not compile filter")
}
return f, nil
}
// Compile the given tcpdump-like expression to a BPF filter.
func Compile(filter string, link_type packet.Type) (*Filter, error) {
f := &Filter{}
fil_str := C.CString(filter)
defer C.free(unsafe.Pointer(fil_str))
err_str := (*C.char)(C.calloc(256, 1))
defer C.free(unsafe.Pointer(err_str))
pcap_type := link_type.ToLinkType()
err := C.pcap_compile_nopcap(
C.int(0x7fff), C.int(pcap_type),
(*C.struct_bpf_program)(f.Program()),
fil_str, 0, 0xffffffff,
)
if err < 0 {
return nil, fmt.Errorf("Could not compile filter")
}
return f, nil
}