Ryujinx/Ryujinx.HLE/HOS/Services/Sfdnsres/IResolver.cs

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C#
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using Ryujinx.Common.Logging;
using Ryujinx.HLE.HOS.Ipc;
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
using static Ryujinx.HLE.HOS.ErrorCode;
namespace Ryujinx.HLE.HOS.Services.Sfdnsres
{
class IResolver : IpcService
{
private Dictionary<int, ServiceProcessRequest> _commands;
public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
public IResolver()
{
_commands = new Dictionary<int, ServiceProcessRequest>
{
{ 0, SetDnsAddressesPrivate },
{ 1, GetDnsAddressesPrivate },
{ 2, GetHostByName },
{ 3, GetHostByAddress },
{ 4, GetHostStringError },
{ 5, GetGaiStringError },
{ 8, RequestCancelHandle },
{ 9, CancelSocketCall },
{ 11, ClearDnsAddresses }
};
}
private long SerializeHostEnt(ServiceCtx context, IPHostEntry hostEntry, List<IPAddress> addresses = null)
{
long originalBufferPosition = context.Request.ReceiveBuff[0].Position;
long bufferPosition = originalBufferPosition;
long bufferSize = context.Request.ReceiveBuff[0].Size;
string hostName = hostEntry.HostName + '\0';
// h_name
context.Memory.WriteBytes(bufferPosition, Encoding.ASCII.GetBytes(hostName));
bufferPosition += hostName.Length;
// h_aliases list size
context.Memory.WriteInt32(bufferPosition, IPAddress.HostToNetworkOrder(hostEntry.Aliases.Length));
bufferPosition += 4;
// Actual aliases
foreach (string alias in hostEntry.Aliases)
{
context.Memory.WriteBytes(bufferPosition, Encoding.ASCII.GetBytes(alias + '\0'));
bufferPosition += alias.Length + 1;
}
// h_addrtype but it's a short (also only support IPv4)
context.Memory.WriteInt16(bufferPosition, IPAddress.HostToNetworkOrder((short)2));
bufferPosition += 2;
// h_length but it's a short
context.Memory.WriteInt16(bufferPosition, IPAddress.HostToNetworkOrder((short)4));
bufferPosition += 2;
// Ip address count, we can only support ipv4 (blame Nintendo)
context.Memory.WriteInt32(bufferPosition, addresses != null ? IPAddress.HostToNetworkOrder(addresses.Count) : 0);
bufferPosition += 4;
if (addresses != null)
{
foreach (IPAddress ip in addresses)
{
context.Memory.WriteInt32(bufferPosition, IPAddress.HostToNetworkOrder(BitConverter.ToInt32(ip.GetAddressBytes(), 0)));
bufferPosition += 4;
}
}
return bufferPosition - originalBufferPosition;
}
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 string GetHostStringErrorFromErrorCode(NetDbError errorCode)
{
if (errorCode <= NetDbError.Internal)
{
return "Resolver internal error";
}
switch (errorCode)
{
case NetDbError.Success:
return "Resolver Error 0 (no error)";
case NetDbError.HostNotFound:
return "Unknown host";
case NetDbError.TryAgain:
return "Host name lookup failure";
case NetDbError.NoRecovery:
return "Unknown server error";
case NetDbError.NoData:
return "No address associated with name";
default:
return "Unknown resolver error";
}
}
private List<IPAddress> GetIpv4Addresses(IPHostEntry hostEntry)
{
List<IPAddress> result = new List<IPAddress>();
foreach (IPAddress ip in hostEntry.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
result.Add(ip);
}
return result;
}
// SetDnsAddressesPrivate(u32, buffer<unknown, 5, 0>)
public long SetDnsAddressesPrivate(ServiceCtx context)
{
uint unknown0 = context.RequestData.ReadUInt32();
long bufferPosition = context.Request.SendBuff[0].Position;
long bufferSize = context.Request.SendBuff[0].Size;
// TODO: This is stubbed in 2.0.0+, reverse 1.0.0 version for the sake completeness.
Logger.PrintStub(LogClass.ServiceSfdnsres, $"Stubbed. Unknown0: {unknown0}");
return MakeError(ErrorModule.Os, 1023);
}
// GetDnsAddressPrivate(u32) -> buffer<unknown, 6, 0>
public long GetDnsAddressesPrivate(ServiceCtx context)
{
uint unknown0 = context.RequestData.ReadUInt32();
// TODO: This is stubbed in 2.0.0+, reverse 1.0.0 version for the sake completeness.
Logger.PrintStub(LogClass.ServiceSfdnsres, $"Stubbed. Unknown0: {unknown0}");
return MakeError(ErrorModule.Os, 1023);
}
// 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;
}
// 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;
}
// GetHostStringError(u32) -> buffer<unknown, 6, 0>
public long GetHostStringError(ServiceCtx context)
{
long resultCode = MakeError(ErrorModule.Os, 1023);
NetDbError errorCode = (NetDbError)context.RequestData.ReadInt32();
string errorString = GetHostStringErrorFromErrorCode(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 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;
}
// RequestCancelHandle(u64, pid) -> u32
public long RequestCancelHandle(ServiceCtx context)
{
ulong unknown0 = context.RequestData.ReadUInt64();
context.ResponseData.Write(0);
Logger.PrintStub(LogClass.ServiceSfdnsres, $"Stubbed. Unknown0: {unknown0}");
return 0;
}
// CancelSocketCall(u32, u64, pid)
public long CancelSocketCall(ServiceCtx context)
{
uint unknown0 = context.RequestData.ReadUInt32();
ulong unknown1 = context.RequestData.ReadUInt64();
Logger.PrintStub(LogClass.ServiceSfdnsres, $"Stubbed. Unknown0: {unknown0} - " +
$"Unknown1: {unknown1}");
return 0;
}
// ClearDnsAddresses(u32)
public long ClearDnsAddresses(ServiceCtx context)
{
uint unknown0 = context.RequestData.ReadUInt32();
Logger.PrintStub(LogClass.ServiceSfdnsres, $"Stubbed. Unknown0: {unknown0}");
return 0;
}
}
}