/// <summary>
/// Constructor.
/// </summary>
/// <param name="match_type">The condition match type.</param>
/// <param name="field_key">The field key.</param>
/// <param name="value">The value.</param>
public FirewallFilterCondition(FirewallMatchType match_type, Guid field_key, FirewallValue value)
{
MatchType = match_type;
FieldKey = field_key;
FieldKeyName = NamedGuidDictionary.ConditionGuids.Value.GetName(FieldKey);
Value = value;
}
internal FirewallFilterCondition(FWPM_FILTER_CONDITION0 condition)
{
MatchType = condition.matchType;
FieldKey = condition.fieldKey;
FieldKeyName = NamedGuidDictionary.ConditionGuids.Value.GetName(FieldKey);
Value = new FirewallValue(condition.conditionValue, condition.fieldKey);
}
private static FirewallAddressAndMask GetAddr(FWP_VALUE0 value)
{
var v = new FirewallValue(value, Guid.Empty);
if (v.Value is FirewallAddressAndMask addr)
{
return(addr);
}
return(default);
internal FirewallFilter(FWPM_FILTER0 filter, FirewallEngine engine, Func <SecurityInformation, bool, NtResult <SecurityDescriptor> > get_sd)
: base(filter.filterKey, filter.displayData, new NamedGuidDictionary(), engine, get_sd)
{
ActionType = filter.action.type;
if (ActionType.HasFlag(FirewallActionType.Callout))
{
CalloutKey = filter.action.action.calloutKey;
CalloutKeyName = NamedGuidDictionary.CalloutGuids.Value.GetName(CalloutKey);
}
else
{
FilterType = filter.action.action.filterType;
}
LayerKey = filter.layerKey;
LayerKeyName = NamedGuidDictionary.LayerGuids.Value.GetName(LayerKey);
SubLayerKey = filter.subLayerKey;
SubLayerKeyName = NamedGuidDictionary.SubLayerGuids.Value.GetName(SubLayerKey);
Flags = filter.flags;
List <FirewallFilterCondition> conditions = new List <FirewallFilterCondition>();
if (filter.numFilterConditions > 0)
{
var conds = new SafeHGlobalBuffer(filter.filterCondition, 1, false);
conds.Initialize <FWPM_FILTER_CONDITION0>((uint)filter.numFilterConditions);
conditions.AddRange(conds.ReadArray <FWPM_FILTER_CONDITION0>(0, filter.numFilterConditions).Select(c => new FirewallFilterCondition(c)));
}
Conditions = conditions.AsReadOnly();
Weight = new FirewallValue(filter.weight, Guid.Empty);
EffectiveWeight = new FirewallValue(filter.effectiveWeight, Guid.Empty);
if (filter.providerKey != IntPtr.Zero)
{
ProviderKey = filter.providerKey.ReadGuid() ?? Guid.Empty;
}
ProviderData = filter.providerData.ToArray();
FilterId = filter.filterId;
}
/// <summary>
/// Add a package SID condition.
/// </summary>
/// <param name="match_type">The match type.</param>
/// <param name="package_sid">The package SID.</param>
public void AddPackageSid(FirewallMatchType match_type, Sid package_sid)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_ALE_PACKAGE_ID, FirewallValue.FromSid(package_sid));
}
/// <summary>
/// Add a remote user ID security descriptor condition.
/// </summary>
/// <param name="match_type">The match type for the condition.</param>
/// <param name="security_descriptor">The security descriptor.</param>
public void AddRemoteUserId(FirewallMatchType match_type, SecurityDescriptor security_descriptor)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_ALE_REMOTE_USER_ID,
FirewallValue.FromSecurityDescriptor(security_descriptor));
}
/// <summary>
/// Add a conditions flag condition.
/// </summary>
/// <param name="match_type">The match type for the condition.</param>
/// <param name="flags">The flags for the condition.</param>
public void AddConditionFlags(FirewallMatchType match_type, FirewallConditionFlags flags)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_FLAGS, FirewallValue.FromConditionFlags(flags));
}
/// <summary>
/// Add a condition range.
/// </summary>
/// <param name="field_key">The field key for the condition.</param>
/// <param name="low">The low value for the range.</param>
/// <param name="high">The high value from the range.</param>
public void AddConditionRange(Guid field_key, FirewallValue low, FirewallValue high)
{
AddCondition(FirewallMatchType.Range, field_key, FirewallValue.FromRange(low, high));
}
/// <summary>
/// Add an App ID condition.
/// </summary>
/// <param name="match_type">The match type for the condition.</param>
/// <param name="appid">The path to the file already converted to absolute format.</param>
public void AddAppId(FirewallMatchType match_type, string appid)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_ALE_APP_ID,
FirewallValue.FromBlobUnicodeString(appid));
}
/// <summary>
/// Add a IP protocol type condition.
/// </summary>
/// <param name="match_type">The match type for the condition.</param>
/// <param name="protocol">The protocol type for the condition.</param>
public void AddProtocolType(FirewallMatchType match_type, ProtocolType protocol)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_IP_PROTOCOL, FirewallValue.FromProtocolType(protocol));
}
/// <summary>
/// Add a condition.
/// </summary>
/// <param name="match_type">The match type for the condition.</param>
/// <param name="field_key">The field key for the condition.</param>
/// <param name="value">The value for the condition.</param>
public void AddCondition(FirewallMatchType match_type, Guid field_key, FirewallValue value)
{
Conditions.Add(new FirewallFilterCondition(match_type, field_key, value));
}
/// <summary>
/// Add IP address.
/// </summary>
/// <param name="match_type">The match type for the condition.</param>
/// <param name="remote">True to specify remote, false for local.</param>
/// <param name="address">The low IP address.</param>
public void AddIpAddress(FirewallMatchType match_type, bool remote, IPAddress address)
{
AddCondition(match_type, remote ? FirewallConditionGuids.FWPM_CONDITION_IP_REMOTE_ADDRESS : FirewallConditionGuids.FWPM_CONDITION_IP_LOCAL_ADDRESS,
FirewallValue.FromIpAddress(address));
}
internal FirewallRange(FirewallValue low, FirewallValue high)
{
Low = low;
High = high;
}
/// <summary>
/// Add remote machine token information.
/// </summary>
/// <param name="match_type">The match type.</param>
/// <param name="token">The token.</param>
public void AddRemoteMachineToken(FirewallMatchType match_type, NtToken token)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_ALE_REMOTE_MACHINE_ID,
FirewallValue.FromTokenInformation(token));
}
/// <summary>
/// Add token information.
/// </summary>
/// <param name="match_type">The match type.</param>
/// <param name="token">The token.</param>
public void AddUserToken(FirewallMatchType match_type, NtToken token)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_ALE_USER_ID,
FirewallValue.FromTokenInformation(token));
}
/// <summary>
/// Add port.
/// </summary>
/// <param name="match_type">The match type for the condition.</param>
/// <param name="remote">True to specify remote, false for local.</param>
/// <param name="port">The port.</param>
public void AddPort(FirewallMatchType match_type, bool remote, int port)
{
AddCondition(match_type, remote ? FirewallConditionGuids.FWPM_CONDITION_IP_REMOTE_PORT : FirewallConditionGuids.FWPM_CONDITION_IP_LOCAL_PORT,
FirewallValue.FromUInt16((ushort)port));
}
/// <summary>
/// Add port range.
/// </summary>
/// <param name="remote">True to specify remote, false for local.</param>
/// <param name="low_port">The low port.</param>
/// <param name="high_port">The high port.</param>
public void AddPortRange(bool remote, int low_port, int high_port)
{
AddConditionRange(remote ? FirewallConditionGuids.FWPM_CONDITION_IP_REMOTE_PORT : FirewallConditionGuids.FWPM_CONDITION_IP_LOCAL_PORT,
FirewallValue.FromUInt16((ushort)low_port), FirewallValue.FromUInt16((ushort)high_port));
}
/// <summary>
/// Add IP address range.
/// </summary>
/// <param name="remote">True to specify remote, false for local.</param>
/// <param name="low_address">The low IP address.</param>
/// <param name="high_address">The high IP address.</param>
public void AddIpRange(bool remote, IPAddress low_address, IPAddress high_address)
{
AddConditionRange(remote ? FirewallConditionGuids.FWPM_CONDITION_IP_REMOTE_ADDRESS : FirewallConditionGuids.FWPM_CONDITION_IP_LOCAL_ADDRESS,
FirewallValue.FromIpAddress(low_address), FirewallValue.FromIpAddress(high_address));
}
internal FirewallRange(FWP_RANGE0 range, Guid condition_key)
{
Low = new FirewallValue(range.valueLow, condition_key);
High = new FirewallValue(range.valueHigh, condition_key);
}
/// <summary>
/// Add the RPC UUID.
/// </summary>
/// <param name="match_type">Match type.</param>
/// <param name="uuid">The RPC UUID.</param>
public void AddRpcUuid(FirewallMatchType match_type, Guid uuid)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_RPC_IF_UUID, FirewallValue.FromGuid(uuid));
}
private static FirewallFilterCondition ConvertUserId(FirewallFilterCondition condition)
{
if (condition.FieldKey != FirewallConditionGuids.FWPM_CONDITION_ALE_USER_ID)
{
return(condition);
}
if (condition.Value.Type == FirewallDataType.Sid)
{
return(condition);
}
if (!(condition.Value.Value is FirewallTokenInformation token_info))
{
throw new ArgumentException("Must specify a SID or FirewallTokenInformation for FWPM_CONDITION_ALE_USER_ID.");
}
if (token_info.UserSid == null)
{
throw new ArgumentException("Must specify a user SID for the TokenInformation for FWPM_CONDITION_ALE_USER_ID.");
}
return(new FirewallFilterCondition(condition.MatchType, condition.FieldKey, FirewallValue.FromSid(token_info.UserSid)));
}
/// <summary>
/// Add a network event type.
/// </summary>
/// <param name="match_type">Match type.</param>
/// <param name="type">Network event type.</param>
public void AddNetEventType(FirewallMatchType match_type, FirewallNetEventType type)
{
AddCondition(match_type, FirewallConditionGuids.FWPM_CONDITION_NET_EVENT_TYPE, FirewallValue.FromUInt32((uint)type));
}
