public static BpfProgram TryCreate(PcapHandle pcapHandle, string filter, int optimize = 1, uint netmask = 0)
{
var bpfProgram = new BpfProgram();
int result;
// Compile the expressions
if (ThreadSafeCompile)
{
result = LibPcapSafeNativeMethods.pcap_compile(pcapHandle,
bpfProgram,
filter,
optimize,
netmask);
}
else
{
lock (SyncCompile)
{
result = LibPcapSafeNativeMethods.pcap_compile(pcapHandle,
bpfProgram,
filter,
optimize,
netmask);
}
}
if (result < 0)
{
// Don't use Dispose since we don't want pcap_freecode to be called here
Marshal.FreeHGlobal(bpfProgram.handle);
bpfProgram.SetHandle(IntPtr.Zero);
bpfProgram = null;
}
return(bpfProgram);
}
/// <summary>
/// Available since libpcap 1.5
/// </summary>
/// <param name="adapter"></param>
/// <param name="precision"></param>
/// <returns></returns>
internal static int pcap_set_tstamp_precision(PcapHandle /* pcap_t* p */ adapter, int precision)
{
if (Pcap.LibpcapVersion < Libpcap_1_5)
{
return((int)PcapError.TimestampPrecisionNotSupported);
}
return(_pcap_set_tstamp_precision(adapter, precision));
}
/// <summary>
/// Available since libpcap 1.5
/// </summary>
/// <param name="adapter"></param>
internal static int pcap_get_tstamp_precision(PcapHandle /* pcap_t* p */ adapter)
{
if (Pcap.LibpcapVersion < Libpcap_1_5)
{
return((int)TimestampResolution.Microsecond);
}
return(_pcap_get_tstamp_precision(adapter));
}
public static BpfProgram Create(PcapHandle pcapHandle, string filter, int optimize = 1, uint netmask = 0)
{
var bpfProgram = TryCreate(pcapHandle, filter, optimize, netmask);
if (bpfProgram == null)
{
throw new PcapException(PcapDevice.GetLastError(pcapHandle));
}
return(bpfProgram);
}
/// <summary>
/// pcap_set_rfmon() sets whether monitor mode should be set on a capture handle when the handle is activated.
/// If rfmon is non-zero, monitor mode will be set, otherwise it will not be set.
/// </summary>
/// <param name="p">A <see cref="IntPtr"/></param>
/// <param name="rfmon">A <see cref="int"/></param>
/// <returns>Returns 0 on success or PCAP_ERROR_ACTIVATED if called on a capture handle that has been activated.</returns>
internal static int pcap_set_rfmon(PcapHandle /* pcap_t* */ p, int rfmon)
{
try
{
return(_pcap_set_rfmon(p, rfmon));
}
catch (EntryPointNotFoundException)
{
return((int)PcapError.RfmonNotSupported);
}
}
internal extern static int pcap_setmode(PcapHandle /* pcap_t * */ p, int mode);
private extern static int _pcap_setmintocopy(PcapHandle /* pcap_t */ adapter, int sizeInBytes);
private extern static int _pcap_setbuff(PcapHandle /* pcap_t */ adapter, int bufferSizeInBytes);
internal extern static int pcap_list_tstamp_types(PcapHandle /* pcap_t* p */ adapter, ref IntPtr types_pointer_pointer);
internal extern static int pcap_getnonblock(
PcapHandle /* pcap_if_t** */ adaptHandle,
[MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(PcapStringMarshaler))] StringBuilder /* char* */ errbuf
);
internal extern static int pcap_snapshot(PcapHandle /* pcap_t * */ adapter);
internal static PcapError pcap_setbuff(PcapHandle /* pcap_t */ adapter, int bufferSizeInBytes)
{
return(RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
? _pcap_setbuff(adapter, bufferSizeInBytes)
: PcapError.PlatformNotSupported);
}
internal extern static int pcap_fileno(PcapHandle /* pcap_t* p */ adapter);
internal extern static int pcap_breakloop(PcapHandle /* pcap_t* */ p);
internal extern static int pcap_activate(PcapHandle /* pcap_t* */ p);
internal extern static int pcap_set_timeout(PcapHandle /* pcap_t* */ p, int to_ms);
internal extern static int pcap_set_promisc(PcapHandle /* pcap_t* */ p, int promisc);
internal extern static int pcap_set_snaplen(PcapHandle /* pcap_t* */ p, int snaplen);
private extern static int _pcap_set_rfmon(PcapHandle /* pcap_t* */ p, int rfmon);
internal extern static int pcap_set_buffer_size(PcapHandle /* pcap_t */ adapter, int bufferSizeInBytes);
internal extern static int pcap_set_immediate_mode(PcapHandle /* pcap_t */ adapter, int immediate_mode);
internal extern static int pcap_get_selectable_fd(PcapHandle /* pcap_t* */ adaptHandle);
internal static int pcap_setmintocopy(PcapHandle /* pcap_t */ adapter, int sizeInBytes)
{
return(RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
? _pcap_setmintocopy(adapter, sizeInBytes)
: (int)PcapError.PlatformNotSupported);
}
internal extern static int pcap_stats(PcapHandle /* pcap_t* */ adapter, IntPtr /* struct pcap_stat* */ stat);
internal extern static int pcap_sendqueue_transmit(PcapHandle /*pcap_t * */ p, ref pcap_send_queue queue, int sync);
internal extern static int pcap_dispatch(PcapHandle /* pcap_t* */ adaptHandle, int count, pcap_handler callback, IntPtr ptr);
private extern static int _pcap_get_tstamp_precision(PcapHandle /* pcap_t* p */ adapter);
internal extern static int pcap_set_tstamp_type(PcapHandle /* pcap_t* p */ adapter, int tstamp_type);
/// <summary>
/// Retrieve the last error string for a given pcap_t* device
/// </summary>
/// <param name="deviceHandle">
/// A <see cref="IntPtr"/>
/// </param>
/// <returns>
/// A <see cref="string"/>
/// </returns>
internal static string GetLastError(PcapHandle deviceHandle)
{
return(LibPcapSafeNativeMethods.pcap_geterr(deviceHandle));
}
internal extern static int pcap_datalink(PcapHandle /* pcap_t* */ adaptHandle);
