private string GetGaiStringErrorFromErrorCode(GaiError errorCode)
{
if (errorCode > GaiError.Max)
{
errorCode = GaiError.Max;
}
switch (errorCode)
{
case GaiError.AddressFamily:
return("Address family for hostname not supported");
case GaiError.Again:
return("Temporary failure in name resolution");
case GaiError.BadFlags:
return("Invalid value for ai_flags");
case GaiError.Fail:
return("Non-recoverable failure in name resolution");
case GaiError.Family:
return("ai_family not supported");
case GaiError.Memory:
return("Memory allocation failure");
case GaiError.NoData:
return("No address associated with hostname");
case GaiError.NoName:
return("hostname nor servname provided, or not known");
case GaiError.Service:
return("servname not supported for ai_socktype");
case GaiError.SocketType:
return("ai_socktype not supported");
case GaiError.System:
return("System error returned in errno");
case GaiError.BadHints:
return("Invalid value for hints");
case GaiError.Protocol:
return("Resolved protocol is unknown");
case GaiError.Overflow:
return("Argument buffer overflow");
case GaiError.Max:
return("Unknown error");
default:
return("Success");
}
}
private ResultCode GetHostByAddrRequestImpl(ServiceCtx context, long inputBufferPosition, long inputBufferSize, long outputBufferPosition, long outputBufferSize, long optionsBufferPosition, long optionsBufferSize)
{
byte[] rawIp = new byte[inputBufferSize];
context.Memory.Read((ulong)inputBufferPosition, rawIp);
// TODO: Use params.
uint socketLength = context.RequestData.ReadUInt32();
uint type = context.RequestData.ReadUInt32();
int timeOut = context.RequestData.ReadInt32();
ulong pidPlaceholder = context.RequestData.ReadUInt64();
if (optionsBufferSize > 0)
{
// TODO: Parse and use options.
}
IPHostEntry hostEntry = null;
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.AddressFamily;
long serializedSize = 0;
if (rawIp.Length == 4)
{
try
{
IPAddress address = new IPAddress(rawIp);
hostEntry = Dns.GetHostEntry(address);
}
catch (SocketException exception)
{
netDbErrorCode = ConvertSocketErrorCodeToNetDbError(exception.ErrorCode);
errno = ConvertSocketErrorCodeToGaiError(exception.ErrorCode, errno);
}
}
else
{
netDbErrorCode = NetDbError.NoAddress;
}
if (hostEntry != null)
{
errno = GaiError.Success;
serializedSize = SerializeHostEntries(context, outputBufferPosition, outputBufferSize, hostEntry, GetIpv4Addresses(hostEntry));
}
context.ResponseData.Write((int)netDbErrorCode);
context.ResponseData.Write((int)errno);
context.ResponseData.Write(serializedSize);
return(ResultCode.Success);
}
// GetGaiStringError(u32) -> buffer<unknown, 6, 0>
public long GetGaiStringError(ServiceCtx Context)
{
long ResultCode = MakeError(ErrorModule.Os, 1023);
GaiError ErrorCode = (GaiError)Context.RequestData.ReadInt32();
string ErrorString = GetGaiStringErrorFromErrorCode(ErrorCode);
if (ErrorString.Length + 1 <= Context.Request.ReceiveBuff[0].Size)
{
ResultCode = 0;
Context.Memory.WriteBytes(Context.Request.ReceiveBuff[0].Position, Encoding.ASCII.GetBytes(ErrorString + '\0'));
}
return(ResultCode);
}
// GetGaiStringError(u32) -> buffer<unknown, 6, 0>
public ResultCode GetGaiStringError(ServiceCtx context)
{
ResultCode resultCode = ResultCode.NotAllocated;
GaiError errorCode = (GaiError)context.RequestData.ReadInt32();
string errorString = GetGaiStringErrorFromErrorCode(errorCode);
if (errorString.Length + 1 <= context.Request.ReceiveBuff[0].Size)
{
resultCode = 0;
context.Memory.WriteBytes(context.Request.ReceiveBuff[0].Position, Encoding.ASCII.GetBytes(errorString + '\0'));
}
return(resultCode);
}
// GetGaiStringErrorRequest(u32) -> buffer<byte, 6, 0>
public ResultCode GetGaiStringErrorRequest(ServiceCtx context)
{
ResultCode resultCode = ResultCode.NotAllocated;
GaiError errorCode = (GaiError)context.RequestData.ReadInt32();
if (errorCode > GaiError.Max)
{
errorCode = GaiError.Max;
}
string errorString = errorCode switch
{
GaiError.AddressFamily => "Address family for hostname not supported",
GaiError.Again => "Temporary failure in name resolution",
GaiError.BadFlags => "Invalid value for ai_flags",
GaiError.Fail => "Non-recoverable failure in name resolution",
GaiError.Family => "ai_family not supported",
GaiError.Memory => "Memory allocation failure",
GaiError.NoData => "No address associated with hostname",
GaiError.NoName => "hostname nor servname provided, or not known",
GaiError.Service => "servname not supported for ai_socktype",
GaiError.SocketType => "ai_socktype not supported",
GaiError.System => "System error returned in errno",
GaiError.BadHints => "Invalid value for hints",
GaiError.Protocol => "Resolved protocol is unknown",
GaiError.Overflow => "Argument buffer overflow",
GaiError.Max => "Unknown error",
_ => "Success"
};
long bufferPosition = context.Request.ReceiveBuff[0].Position;
long bufferSize = context.Request.ReceiveBuff[0].Size;
if (errorString.Length + 1 <= bufferSize)
{
context.Memory.Write((ulong)bufferPosition, Encoding.ASCII.GetBytes(errorString + '\0'));
resultCode = ResultCode.Success;
}
return(resultCode);
}
private static void WriteResponse(
ServiceCtx context,
bool withOptions,
ulong serializedSize,
GaiError errno,
NetDbError netDbErrorCode)
{
if (withOptions)
{
context.ResponseData.Write((int)serializedSize);
context.ResponseData.Write((int)errno);
context.ResponseData.Write((int)netDbErrorCode);
context.ResponseData.Write(0);
}
else
{
context.ResponseData.Write((int)netDbErrorCode);
context.ResponseData.Write((int)errno);
context.ResponseData.Write((int)serializedSize);
}
}
[CommandHipc(14)] // 5.0.0+
// ResolverSetOptionRequest(buffer<unknown, 5, 0>, u64 unknown, u64 pid_placeholder, pid) -> (i32 ret, u32 bsd_errno)
public ResultCode ResolverSetOptionRequest(ServiceCtx context)
{
ulong bufferPosition = context.Request.SendBuff[0].Position;
ulong bufferSize = context.Request.SendBuff[0].Size;
ulong unknown = context.RequestData.ReadUInt64();
byte[] buffer = new byte[bufferSize];
context.Memory.Read(bufferPosition, buffer);
// TODO: Parse and use options.
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { unknown });
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.Success;
context.ResponseData.Write((int)errno);
context.ResponseData.Write((int)netDbErrorCode);
return(ResultCode.Success);
}
private ResultCode GetAddrInfoRequestImpl(ServiceCtx context, long responseBufferPosition, long responseBufferSize, long optionsBufferPosition, long optionsBufferSize)
{
bool enableNsdResolve = (context.RequestData.ReadInt32() & 1) != 0;
uint cancelHandle = context.RequestData.ReadUInt32();
string host = MemoryHelper.ReadAsciiString(context.Memory, context.Request.SendBuff[0].Position, context.Request.SendBuff[0].Size);
string service = MemoryHelper.ReadAsciiString(context.Memory, context.Request.SendBuff[1].Position, context.Request.SendBuff[1].Size);
// NOTE: We ignore hints for now.
DeserializeAddrInfos(context.Memory, (ulong)context.Request.SendBuff[2].Position, (ulong)context.Request.SendBuff[2].Size);
if (optionsBufferSize > 0)
{
// TODO: Find unknown, Parse and use options.
uint unknown = context.RequestData.ReadUInt32();
}
ulong pidPlaceHolder = context.RequestData.ReadUInt64();
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { enableNsdResolve, cancelHandle, pidPlaceHolder, host, service });
IPHostEntry hostEntry = null;
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.AddressFamily;
ulong serializedSize = 0;
if (host.Length <= byte.MaxValue)
{
string targetHost = host;
if (DnsBlacklist.IsHostBlocked(host))
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"DNS Blocked: {host}");
netDbErrorCode = NetDbError.HostNotFound;
errno = GaiError.NoData;
}
else
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"Trying to resolve: {host}");
try
{
hostEntry = Dns.GetHostEntry(targetHost);
}
catch (SocketException exception)
{
netDbErrorCode = ConvertSocketErrorCodeToNetDbError(exception.ErrorCode);
errno = ConvertSocketErrorCodeToGaiError(exception.ErrorCode, errno);
}
}
}
else
{
netDbErrorCode = NetDbError.NoAddress;
}
if (hostEntry != null)
{
int.TryParse(service, out int port);
errno = GaiError.Success;
serializedSize = SerializeAddrInfos(context, responseBufferPosition, responseBufferSize, hostEntry, port);
}
context.ResponseData.Write((int)netDbErrorCode);
context.ResponseData.Write((int)errno);
context.ResponseData.Write(serializedSize);
return(ResultCode.Success);
}
private ResultCode GetHostByNameRequestImpl(ServiceCtx context, long inputBufferPosition, long inputBufferSize, long outputBufferPosition, long outputBufferSize, long optionsBufferPosition, long optionsBufferSize)
{
byte[] rawName = new byte[inputBufferSize];
context.Memory.Read((ulong)inputBufferPosition, rawName);
string name = Encoding.ASCII.GetString(rawName).TrimEnd('\0');
// TODO: Use params.
bool enableNsdResolve = (context.RequestData.ReadInt32() & 1) != 0;
int timeOut = context.RequestData.ReadInt32();
ulong pidPlaceholder = context.RequestData.ReadUInt64();
if (optionsBufferSize > 0)
{
// TODO: Parse and use options.
}
IPHostEntry hostEntry = null;
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.Overflow;
long serializedSize = 0;
if (name.Length <= byte.MaxValue)
{
string targetHost = name;
if (DnsBlacklist.IsHostBlocked(name))
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"DNS Blocked: {name}");
netDbErrorCode = NetDbError.HostNotFound;
errno = GaiError.NoData;
}
else
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"Trying to resolve: {name}");
try
{
hostEntry = Dns.GetHostEntry(targetHost);
}
catch (SocketException exception)
{
netDbErrorCode = ConvertSocketErrorCodeToNetDbError(exception.ErrorCode);
errno = ConvertSocketErrorCodeToGaiError(exception.ErrorCode, errno);
}
}
}
else
{
netDbErrorCode = NetDbError.HostNotFound;
}
if (hostEntry != null)
{
IEnumerable <IPAddress> addresses = GetIpv4Addresses(hostEntry);
if (!addresses.Any())
{
errno = GaiError.NoData;
netDbErrorCode = NetDbError.NoAddress;
}
else
{
errno = GaiError.Success;
serializedSize = SerializeHostEntries(context, outputBufferPosition, outputBufferSize, hostEntry, addresses);
}
}
context.ResponseData.Write((int)netDbErrorCode);
context.ResponseData.Write((int)errno);
context.ResponseData.Write(serializedSize);
return(ResultCode.Success);
}
// GetHostByAddr(u32, u32, u32, u64, pid, buffer<unknown, 5, 0>) -> (u32, u32, u32, buffer<unknown, 6, 0>)
public ResultCode GetHostByAddress(ServiceCtx context)
{
byte[] rawIp = context.Memory.ReadBytes(context.Request.SendBuff[0].Position, context.Request.SendBuff[0].Size);
// TODO: use params
uint socketLength = context.RequestData.ReadUInt32();
uint type = context.RequestData.ReadUInt32();
int timeOut = context.RequestData.ReadInt32();
ulong pidPlaceholder = context.RequestData.ReadUInt64();
IPHostEntry hostEntry = null;
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.AddressFamily;
long serializedSize = 0;
if (rawIp.Length == 4)
{
try
{
IPAddress address = new IPAddress(rawIp);
hostEntry = Dns.GetHostEntry(address);
}
catch (SocketException exception)
{
netDbErrorCode = NetDbError.Internal;
if (exception.ErrorCode == 11001)
{
netDbErrorCode = NetDbError.HostNotFound;
errno = GaiError.NoData;
}
else if (exception.ErrorCode == 11002)
{
netDbErrorCode = NetDbError.TryAgain;
}
else if (exception.ErrorCode == 11003)
{
netDbErrorCode = NetDbError.NoRecovery;
}
else if (exception.ErrorCode == 11004)
{
netDbErrorCode = NetDbError.NoData;
}
else if (exception.ErrorCode == 10060)
{
errno = GaiError.Again;
}
}
}
else
{
netDbErrorCode = NetDbError.NoAddress;
}
if (hostEntry != null)
{
errno = GaiError.Success;
serializedSize = SerializeHostEnt(context, hostEntry, GetIpv4Addresses(hostEntry));
}
context.ResponseData.Write((int)netDbErrorCode);
context.ResponseData.Write((int)errno);
context.ResponseData.Write(serializedSize);
return(ResultCode.Success);
}
// GetHostByName(u8, u32, u64, pid, buffer<unknown, 5, 0>) -> (u32, u32, u32, buffer<unknown, 6, 0>)
public ResultCode GetHostByName(ServiceCtx context)
{
byte[] rawName = context.Memory.ReadBytes(context.Request.SendBuff[0].Position, context.Request.SendBuff[0].Size);
string name = Encoding.ASCII.GetString(rawName).TrimEnd('\0');
// TODO: use params
bool enableNsdResolve = context.RequestData.ReadInt32() == 1;
int timeOut = context.RequestData.ReadInt32();
ulong pidPlaceholder = context.RequestData.ReadUInt64();
IPHostEntry hostEntry = null;
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.Overflow;
long serializedSize = 0;
if (name.Length <= 255)
{
try
{
hostEntry = Dns.GetHostEntry(name);
}
catch (SocketException exception)
{
netDbErrorCode = NetDbError.Internal;
if (exception.ErrorCode == 11001)
{
netDbErrorCode = NetDbError.HostNotFound;
errno = GaiError.NoData;
}
else if (exception.ErrorCode == 11002)
{
netDbErrorCode = NetDbError.TryAgain;
}
else if (exception.ErrorCode == 11003)
{
netDbErrorCode = NetDbError.NoRecovery;
}
else if (exception.ErrorCode == 11004)
{
netDbErrorCode = NetDbError.NoData;
}
else if (exception.ErrorCode == 10060)
{
errno = GaiError.Again;
}
}
}
else
{
netDbErrorCode = NetDbError.HostNotFound;
}
if (hostEntry != null)
{
errno = GaiError.Success;
List <IPAddress> addresses = GetIpv4Addresses(hostEntry);
if (addresses.Count == 0)
{
errno = GaiError.NoData;
netDbErrorCode = NetDbError.NoAddress;
}
else
{
serializedSize = SerializeHostEnt(context, hostEntry, addresses);
}
}
context.ResponseData.Write((int)netDbErrorCode);
context.ResponseData.Write((int)errno);
context.ResponseData.Write(serializedSize);
return(ResultCode.Success);
}
// GetHostByAddr(u32, u32, u32, u64, pid, buffer<unknown, 5, 0>) -> (u32, u32, u32, buffer<unknown, 6, 0>)
public long GetHostByAddress(ServiceCtx Context)
{
byte[] RawIp = Context.Memory.ReadBytes(Context.Request.SendBuff[0].Position, Context.Request.SendBuff[0].Size);
// TODO: use params
uint SocketLength = Context.RequestData.ReadUInt32();
uint Type = Context.RequestData.ReadUInt32();
int TimeOut = Context.RequestData.ReadInt32();
ulong PidPlaceholder = Context.RequestData.ReadUInt64();
IPHostEntry HostEntry = null;
NetDBError NetDBErrorCode = NetDBError.Success;
GaiError Errno = GaiError.AddressFamily;
long SerializedSize = 0;
if (RawIp.Length == 4)
{
try
{
IPAddress Address = new IPAddress(RawIp);
HostEntry = Dns.GetHostEntry(Address);
}
catch (SocketException Exception)
{
NetDBErrorCode = NetDBError.Internal;
if (Exception.ErrorCode == 11001)
{
NetDBErrorCode = NetDBError.HostNotFound;
Errno = GaiError.NoData;
}
else if (Exception.ErrorCode == 11002)
{
NetDBErrorCode = NetDBError.TryAgain;
}
else if (Exception.ErrorCode == 11003)
{
NetDBErrorCode = NetDBError.NoRecovery;
}
else if (Exception.ErrorCode == 11004)
{
NetDBErrorCode = NetDBError.NoData;
}
else if (Exception.ErrorCode == 10060)
{
Errno = GaiError.Again;
}
}
}
else
{
NetDBErrorCode = NetDBError.NoAddress;
}
if (HostEntry != null)
{
Errno = GaiError.Success;
SerializedSize = SerializeHostEnt(Context, HostEntry, GetIPV4Addresses(HostEntry));
}
Context.ResponseData.Write((int)NetDBErrorCode);
Context.ResponseData.Write((int)Errno);
Context.ResponseData.Write(SerializedSize);
return(0);
}
// GetHostByName(u8, u32, u64, pid, buffer<unknown, 5, 0>) -> (u32, u32, u32, buffer<unknown, 6, 0>)
public long GetHostByName(ServiceCtx Context)
{
byte[] RawName = Context.Memory.ReadBytes(Context.Request.SendBuff[0].Position, Context.Request.SendBuff[0].Size);
string Name = Encoding.ASCII.GetString(RawName).TrimEnd('\0');
// TODO: use params
bool EnableNsdResolve = Context.RequestData.ReadInt32() == 1;
int TimeOut = Context.RequestData.ReadInt32();
ulong PidPlaceholder = Context.RequestData.ReadUInt64();
IPHostEntry HostEntry = null;
NetDBError NetDBErrorCode = NetDBError.Success;
GaiError Errno = GaiError.Overflow;
long SerializedSize = 0;
if (Name.Length <= 255)
{
try
{
HostEntry = Dns.GetHostEntry(Name);
}
catch (SocketException Exception)
{
NetDBErrorCode = NetDBError.Internal;
if (Exception.ErrorCode == 11001)
{
NetDBErrorCode = NetDBError.HostNotFound;
Errno = GaiError.NoData;
}
else if (Exception.ErrorCode == 11002)
{
NetDBErrorCode = NetDBError.TryAgain;
}
else if (Exception.ErrorCode == 11003)
{
NetDBErrorCode = NetDBError.NoRecovery;
}
else if (Exception.ErrorCode == 11004)
{
NetDBErrorCode = NetDBError.NoData;
}
else if (Exception.ErrorCode == 10060)
{
Errno = GaiError.Again;
}
}
}
else
{
NetDBErrorCode = NetDBError.HostNotFound;
}
if (HostEntry != null)
{
Errno = GaiError.Success;
List <IPAddress> Addresses = GetIPV4Addresses(HostEntry);
if (Addresses.Count == 0)
{
Errno = GaiError.NoData;
NetDBErrorCode = NetDBError.NoAddress;
}
else
{
SerializedSize = SerializeHostEnt(Context, HostEntry, Addresses);
}
}
Context.ResponseData.Write((int)NetDBErrorCode);
Context.ResponseData.Write((int)Errno);
Context.ResponseData.Write(SerializedSize);
return(0);
}
private static ResultCode GetAddrInfoRequestImpl(
ServiceCtx context,
ulong responseBufferPosition,
ulong responseBufferSize,
bool withOptions,
ulong optionsBufferPosition,
ulong optionsBufferSize)
{
bool enableNsdResolve = (context.RequestData.ReadInt32() & 1) != 0;
uint cancelHandle = context.RequestData.ReadUInt32();
string host = MemoryHelper.ReadAsciiString(context.Memory, context.Request.SendBuff[0].Position, (long)context.Request.SendBuff[0].Size);
string service = MemoryHelper.ReadAsciiString(context.Memory, context.Request.SendBuff[1].Position, (long)context.Request.SendBuff[1].Size);
if (!context.Device.Configuration.EnableInternetAccess)
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"Guest network access disabled, DNS Blocked: {host}");
WriteResponse(context, withOptions, 0, GaiError.NoData, NetDbError.HostNotFound);
return(ResultCode.Success);
}
// NOTE: We ignore hints for now.
DeserializeAddrInfos(context.Memory, (ulong)context.Request.SendBuff[2].Position, (ulong)context.Request.SendBuff[2].Size);
if (withOptions)
{
// TODO: Find unknown, Parse and use options.
uint unknown = context.RequestData.ReadUInt32();
}
ulong pidPlaceHolder = context.RequestData.ReadUInt64();
IPHostEntry hostEntry = null;
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.AddressFamily;
ulong serializedSize = 0;
if (host.Length <= byte.MaxValue)
{
if (enableNsdResolve)
{
if (FqdnResolver.Resolve(host, out string newAddress) == Nsd.ResultCode.Success)
{
host = newAddress;
}
}
string targetHost = host;
if (DnsBlacklist.IsHostBlocked(host))
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"DNS Blocked: {host}");
netDbErrorCode = NetDbError.HostNotFound;
errno = GaiError.NoData;
}
else
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"Trying to resolve: {host}");
try
{
hostEntry = Dns.GetHostEntry(targetHost);
}
catch (SocketException exception)
{
netDbErrorCode = ConvertSocketErrorCodeToNetDbError(exception.ErrorCode);
errno = ConvertSocketErrorCodeToGaiError(exception.ErrorCode, errno);
}
}
}
else
{
netDbErrorCode = NetDbError.NoAddress;
}
if (hostEntry != null)
{
int.TryParse(service, out int port);
errno = GaiError.Success;
serializedSize = SerializeAddrInfos(context, responseBufferPosition, responseBufferSize, hostEntry, port);
}
WriteResponse(context, withOptions, serializedSize, errno, netDbErrorCode);
return(ResultCode.Success);
}
private static ResultCode GetHostByAddrRequestImpl(
ServiceCtx context,
ulong inputBufferPosition,
ulong inputBufferSize,
ulong outputBufferPosition,
ulong outputBufferSize,
bool withOptions,
ulong optionsBufferPosition,
ulong optionsBufferSize)
{
if (!context.Device.Configuration.EnableInternetAccess)
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"Guest network access disabled, DNS Blocked.");
WriteResponse(context, withOptions, 0, GaiError.NoData, NetDbError.HostNotFound);
return(ResultCode.Success);
}
byte[] rawIp = new byte[inputBufferSize];
context.Memory.Read(inputBufferPosition, rawIp);
// TODO: Use params.
uint socketLength = context.RequestData.ReadUInt32();
uint type = context.RequestData.ReadUInt32();
int timeOut = context.RequestData.ReadInt32();
ulong pidPlaceholder = context.RequestData.ReadUInt64();
if (withOptions)
{
// TODO: Parse and use options.
}
IPHostEntry hostEntry = null;
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.AddressFamily;
ulong serializedSize = 0;
if (rawIp.Length == 4)
{
try
{
IPAddress address = new IPAddress(rawIp);
hostEntry = Dns.GetHostEntry(address);
}
catch (SocketException exception)
{
netDbErrorCode = ConvertSocketErrorCodeToNetDbError(exception.ErrorCode);
errno = ConvertSocketErrorCodeToGaiError(exception.ErrorCode, errno);
}
}
else
{
netDbErrorCode = NetDbError.NoAddress;
}
if (hostEntry != null)
{
errno = GaiError.Success;
serializedSize = SerializeHostEntries(context, outputBufferPosition, outputBufferSize, hostEntry, GetIpv4Addresses(hostEntry));
}
WriteResponse(context, withOptions, serializedSize, errno, netDbErrorCode);
return(ResultCode.Success);
}
private static ResultCode GetHostByNameRequestImpl(
ServiceCtx context,
ulong inputBufferPosition,
ulong inputBufferSize,
ulong outputBufferPosition,
ulong outputBufferSize,
bool withOptions,
ulong optionsBufferPosition,
ulong optionsBufferSize)
{
string host = MemoryHelper.ReadAsciiString(context.Memory, inputBufferPosition, (int)inputBufferSize);
if (!context.Device.Configuration.EnableInternetAccess)
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"Guest network access disabled, DNS Blocked: {host}");
WriteResponse(context, withOptions, 0, GaiError.NoData, NetDbError.HostNotFound);
return(ResultCode.Success);
}
// TODO: Use params.
bool enableNsdResolve = (context.RequestData.ReadInt32() & 1) != 0;
int timeOut = context.RequestData.ReadInt32();
ulong pidPlaceholder = context.RequestData.ReadUInt64();
if (withOptions)
{
// TODO: Parse and use options.
}
IPHostEntry hostEntry = null;
NetDbError netDbErrorCode = NetDbError.Success;
GaiError errno = GaiError.Overflow;
ulong serializedSize = 0;
if (host.Length <= byte.MaxValue)
{
if (enableNsdResolve)
{
if (FqdnResolver.Resolve(host, out string newAddress) == Nsd.ResultCode.Success)
{
host = newAddress;
}
}
string targetHost = host;
if (DnsBlacklist.IsHostBlocked(host))
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"DNS Blocked: {host}");
netDbErrorCode = NetDbError.HostNotFound;
errno = GaiError.NoData;
}
else
{
Logger.Info?.Print(LogClass.ServiceSfdnsres, $"Trying to resolve: {host}");
try
{
hostEntry = Dns.GetHostEntry(targetHost);
}
catch (SocketException exception)
{
netDbErrorCode = ConvertSocketErrorCodeToNetDbError(exception.ErrorCode);
errno = ConvertSocketErrorCodeToGaiError(exception.ErrorCode, errno);
}
}
}
else
{
netDbErrorCode = NetDbError.HostNotFound;
}
if (hostEntry != null)
{
IEnumerable <IPAddress> addresses = GetIpv4Addresses(hostEntry);
if (!addresses.Any())
{
errno = GaiError.NoData;
netDbErrorCode = NetDbError.NoAddress;
}
else
{
errno = GaiError.Success;
serializedSize = SerializeHostEntries(context, outputBufferPosition, outputBufferSize, hostEntry, addresses);
}
}
WriteResponse(context, withOptions, serializedSize, errno, netDbErrorCode);
return(ResultCode.Success);
}
