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sfdnsres: Cleanup service and implements some calls (#2130)

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* sfdnsres: Cleanup service and implements some calls

This PR is a big cleanup to our current implementation of `sfdnsres` service.
Additionnaly to that, some calls and fix have been done by @Thog (PRd with approval, thanks to her).
- Implementation of `GetAddrInfoRequest` (Fixes #637).
- Partial implementation of `GetHostByNameRequestWithOptions`, `GetHostByAddrRequestWithOptions` and `GetAddrInfoRequestWithOptions` (Fixes #642, Fixes #1233).

A DNS Blacklist have been done by @riperiperi (which is currently used in LDN build, then that reduces code differences between the LDN build and master.

Now a lot of games are playable or are blocked to the menu because it needs online service:

Co-Authored-By: Mary <1760003+Thog@users.noreply.github.com>
Co-Authored-By: riperiperi <6294155+riperiperi@users.noreply.github.com>

* Addressed gdkchan's comments

* IPAddress[] to IEnumerable

* Nits

Co-authored-by: Mary <1760003+Thog@users.noreply.github.com>
Co-authored-by: riperiperi <6294155+riperiperi@users.noreply.github.com>
This commit is contained in:
Ac_K 2021-03-24 18:43:23 +01:00 committed by GitHub
parent 69f8722e79
commit e5741fae2d
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 532 additions and 255 deletions
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686
Ryujinx.HLE/HOS/Services/Sockets/Sfdnsres/IResolver.cs
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@ -1,8 +1,15 @@
using Ryujinx.Common.Logging;
using Ryujinx.Cpu;
using Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres.Proxy;
using Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres.Types;
using Ryujinx.Memory;
using System;
using System.Buffers.Binary;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Runtime.CompilerServices;
using System.Text;
namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres
@ -12,209 +19,250 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres
{
public IResolver(ServiceCtx context) { }
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.Write((ulong)bufferPosition, Encoding.ASCII.GetBytes(hostName));
bufferPosition += hostName.Length;
// h_aliases list size
context.Memory.Write((ulong)bufferPosition, IPAddress.HostToNetworkOrder(hostEntry.Aliases.Length));
bufferPosition += 4;
// Actual aliases
foreach (string alias in hostEntry.Aliases)
{
context.Memory.Write((ulong)bufferPosition, Encoding.ASCII.GetBytes(alias + '\0'));
bufferPosition += alias.Length + 1;
}
// h_addrtype but it's a short (also only support IPv4)
context.Memory.Write((ulong)bufferPosition, IPAddress.HostToNetworkOrder((short)2));
bufferPosition += 2;
// h_length but it's a short
context.Memory.Write((ulong)bufferPosition, IPAddress.HostToNetworkOrder((short)4));
bufferPosition += 2;
// Ip address count, we can only support ipv4 (blame Nintendo)
context.Memory.Write((ulong)bufferPosition, addresses != null ? IPAddress.HostToNetworkOrder(addresses.Count) : 0);
bufferPosition += 4;
if (addresses != null)
{
foreach (IPAddress ip in addresses)
{
context.Memory.Write((ulong)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;
}
[Command(0)]
// SetDnsAddressesPrivate(u32, buffer<unknown, 5, 0>)
public ResultCode SetDnsAddressesPrivate(ServiceCtx context)
// SetDnsAddressesPrivateRequest(u32, buffer<unknown, 5, 0>)
public ResultCode SetDnsAddressesPrivateRequest(ServiceCtx context)
{
uint unknown0 = context.RequestData.ReadUInt32();
long bufferPosition = context.Request.SendBuff[0].Position;
long bufferSize = context.Request.SendBuff[0].Size;
uint cancelHandleRequest = 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.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { unknown0 });
// TODO: This is stubbed in 2.0.0+, reverse 1.0.0 version for the sake of completeness.
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { cancelHandleRequest });
return ResultCode.NotAllocated;
}
[Command(1)]
// GetDnsAddressPrivate(u32) -> buffer<unknown, 6, 0>
public ResultCode GetDnsAddressesPrivate(ServiceCtx context)
// GetDnsAddressPrivateRequest(u32) -> buffer<unknown, 6, 0>
public ResultCode GetDnsAddressPrivateRequest(ServiceCtx context)
{
uint unknown0 = context.RequestData.ReadUInt32();
uint cancelHandleRequest = context.RequestData.ReadUInt32();
long bufferPosition = context.Request.ReceiveBuff[0].Position;
long bufferSize = context.Request.ReceiveBuff[0].Size;
// TODO: This is stubbed in 2.0.0+, reverse 1.0.0 version for the sake completeness.
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { unknown0 });
// TODO: This is stubbed in 2.0.0+, reverse 1.0.0 version for the sake of completeness.
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { cancelHandleRequest });
return ResultCode.NotAllocated;
}
[Command(2)]
// GetHostByName(u8, u32, u64, pid, buffer<unknown, 5, 0>) -> (u32, u32, u32, buffer<unknown, 6, 0>)
public ResultCode GetHostByName(ServiceCtx context)
// GetHostByNameRequest(u8, u32, u64, pid, buffer<unknown, 5, 0>) -> (u32, u32, u32, buffer<unknown, 6, 0>)
public ResultCode GetHostByNameRequest(ServiceCtx context)
{
byte[] rawName = new byte[context.Request.SendBuff[0].Size];
long inputBufferPosition = context.Request.SendBuff[0].Position;
long inputBufferSize = context.Request.SendBuff[0].Size;
context.Memory.Read((ulong)context.Request.SendBuff[0].Position, rawName);
long outputBufferPosition = context.Request.ReceiveBuff[0].Position;
long outputBufferSize = context.Request.ReceiveBuff[0].Size;
return GetHostByNameRequestImpl(context, inputBufferPosition, inputBufferSize, outputBufferPosition, outputBufferSize, 0, 0);
}
[Command(3)]
// GetHostByAddrRequest(u32, u32, u32, u64, pid, buffer<unknown, 5, 0>) -> (u32, u32, u32, buffer<unknown, 6, 0>)
public ResultCode GetHostByAddrRequest(ServiceCtx context)
{
long inputBufferPosition = context.Request.SendBuff[0].Position;
long inputBufferSize = context.Request.SendBuff[0].Size;
long outputBufferPosition = context.Request.ReceiveBuff[0].Position;
long outputBufferSize = context.Request.ReceiveBuff[0].Size;
return GetHostByAddrRequestImpl(context, inputBufferPosition, inputBufferSize, outputBufferPosition, outputBufferSize, 0, 0);
}
[Command(4)]
// GetHostStringErrorRequest(u32) -> buffer<unknown, 6, 0>
public ResultCode GetHostStringErrorRequest(ServiceCtx context)
{
ResultCode resultCode = ResultCode.NotAllocated;
NetDbError errorCode = (NetDbError)context.RequestData.ReadInt32();
string errorString = errorCode switch
{
NetDbError.Success => "Resolver Error 0 (no error)",
NetDbError.HostNotFound => "Unknown host",
NetDbError.TryAgain => "Host name lookup failure",
NetDbError.NoRecovery => "Unknown server error",
NetDbError.NoData => "No address associated with name",
_ => (errorCode <= NetDbError.Internal) ? "Resolver internal error" : "Unknown resolver error"
};
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;
}
[Command(5)]
// 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;
}
[Command(6)]
// GetAddrInfoRequest(bool enable_nsd_resolve, u32, u64 pid_placeholder, pid, buffer<i8, 5, 0> host, buffer<i8, 5, 0> service, buffer<packed_addrinfo, 5, 0> hints) -> (i32 ret, u32 bsd_errno, u32 packed_addrinfo_size, buffer<packed_addrinfo, 6, 0> response)
public ResultCode GetAddrInfoRequest(ServiceCtx context)
{
long responseBufferPosition = context.Request.ReceiveBuff[0].Position;
long responseBufferSize = context.Request.ReceiveBuff[0].Size;
return GetAddrInfoRequestImpl(context, responseBufferPosition, responseBufferSize, 0, 0);
}
[Command(8)]
// GetCancelHandleRequest(u64, pid) -> u32
public ResultCode GetCancelHandleRequest(ServiceCtx context)
{
ulong pidPlaceHolder = context.RequestData.ReadUInt64();
uint cancelHandleRequest = 0;
context.ResponseData.Write(cancelHandleRequest);
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { cancelHandleRequest });
return ResultCode.Success;
}
[Command(9)]
// CancelRequest(u32, u64, pid)
public ResultCode CancelRequest(ServiceCtx context)
{
uint cancelHandleRequest = context.RequestData.ReadUInt32();
ulong pidPlaceHolder = context.RequestData.ReadUInt64();
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { cancelHandleRequest });
return ResultCode.Success;
}
[Command(10)] // 5.0.0+
// GetHostByNameRequestWithOptions(u8, u32, u64, pid, buffer<unknown, 21, 0>, buffer<unknown, 21, 0>) -> (u32, u32, u32, buffer<unknown, 22, 0>)
public ResultCode GetHostByNameRequestWithOptions(ServiceCtx context)
{
(long inputBufferPosition, long inputBufferSize) = context.Request.GetBufferType0x21();
(long outputBufferPosition, long outputBufferSize) = context.Request.GetBufferType0x22();
(long optionsBufferPosition, long optionsBufferSize) = context.Request.GetBufferType0x21();
return GetHostByNameRequestImpl(context, inputBufferPosition, inputBufferSize, outputBufferPosition, outputBufferSize, optionsBufferPosition, optionsBufferSize);
}
[Command(11)] // 5.0.0+
// GetHostByAddrRequestWithOptions(u32, u32, u32, u64, pid, buffer<unknown, 21, 0>, buffer<unknown, 21, 0>) -> (u32, u32, u32, buffer<unknown, 22, 0>)
public ResultCode GetHostByAddrRequestWithOptions(ServiceCtx context)
{
(long inputBufferPosition, long inputBufferSize) = context.Request.GetBufferType0x21();
(long outputBufferPosition, long outputBufferSize) = context.Request.GetBufferType0x22();
(long optionsBufferPosition, long optionsBufferSize) = context.Request.GetBufferType0x21();
return GetHostByAddrRequestImpl(context, inputBufferPosition, inputBufferSize, outputBufferPosition, outputBufferSize, optionsBufferPosition, optionsBufferSize);
}
[Command(12)] // 5.0.0+
// GetAddrInfoRequestWithOptions(bool enable_nsd_resolve, u32, u64 pid_placeholder, pid, buffer<i8, 5, 0> host, buffer<i8, 5, 0> service, buffer<packed_addrinfo, 5, 0> hints, buffer<unknown, 21, 0>) -> (i32 ret, u32 bsd_errno, u32 unknown, u32 packed_addrinfo_size, buffer<packed_addrinfo, 22, 0> response)
public ResultCode GetAddrInfoRequestWithOptions(ServiceCtx context)
{
(long responseBufferPosition, long responseBufferSize) = context.Request.GetBufferType0x22();
(long optionsBufferPosition, long optionsBufferSize) = context.Request.GetBufferType0x21();
return GetAddrInfoRequestImpl(context, responseBufferPosition, responseBufferSize, optionsBufferPosition, optionsBufferSize);
}
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;
// 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 <= 255)
if (name.Length <= byte.MaxValue)
{
try
{
hostEntry = Dns.GetHostEntry(name);
}
catch (SocketException exception)
{
netDbErrorCode = NetDbError.Internal;
string targetHost = name;
if (exception.ErrorCode == 11001)
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
{
netDbErrorCode = NetDbError.HostNotFound;
errno = GaiError.NoData;
hostEntry = Dns.GetHostEntry(targetHost);
}
else if (exception.ErrorCode == 11002)
catch (SocketException exception)
{
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;
netDbErrorCode = ConvertSocketErrorCodeToNetDbError(exception.ErrorCode);
errno = ConvertSocketErrorCodeToGaiError(exception.ErrorCode, errno);
}
}
}
@ -225,18 +273,17 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres
if (hostEntry != null)
{
errno = GaiError.Success;
IEnumerable<IPAddress> addresses = GetIpv4Addresses(hostEntry);
List<IPAddress> addresses = GetIpv4Addresses(hostEntry);
if (addresses.Count == 0)
if (!addresses.Any())
{
errno = GaiError.NoData;
netDbErrorCode = NetDbError.NoAddress;
}
else
{
serializedSize = SerializeHostEnt(context, hostEntry, addresses);
errno = GaiError.Success;
serializedSize = SerializeHostEntries(context, outputBufferPosition, outputBufferSize, hostEntry, addresses);
}
}
@ -247,20 +294,23 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres
return ResultCode.Success;
}
[Command(3)]
// GetHostByAddr(u32, u32, u32, u64, pid, buffer<unknown, 5, 0>) -> (u32, u32, u32, buffer<unknown, 6, 0>)
public ResultCode GetHostByAddress(ServiceCtx context)
private ResultCode GetHostByAddrRequestImpl(ServiceCtx context, long inputBufferPosition, long inputBufferSize, long outputBufferPosition, long outputBufferSize, long optionsBufferPosition, long optionsBufferSize)
{
byte[] rawIp = new byte[context.Request.SendBuff[0].Size];
byte[] rawIp = new byte[inputBufferSize];
context.Memory.Read((ulong)context.Request.SendBuff[0].Position, rawIp);
context.Memory.Read((ulong)inputBufferPosition, rawIp);
// TODO: use params
// 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;
@ -277,27 +327,124 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres
}
catch (SocketException exception)
{
netDbErrorCode = NetDbError.Internal;
if (exception.ErrorCode == 11001)
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;
}
private long SerializeHostEntries(ServiceCtx context, long outputBufferPosition, long outputBufferSize, IPHostEntry hostEntry, IEnumerable<IPAddress> addresses = null)
{
long originalBufferPosition = outputBufferPosition;
long bufferPosition = originalBufferPosition;
string hostName = hostEntry.HostName + '\0';
// h_name
context.Memory.Write((ulong)bufferPosition, Encoding.ASCII.GetBytes(hostName));
bufferPosition += hostName.Length;
// h_aliases list size
context.Memory.Write((ulong)bufferPosition, BinaryPrimitives.ReverseEndianness(hostEntry.Aliases.Length));
bufferPosition += 4;
// Actual aliases
foreach (string alias in hostEntry.Aliases)
{
context.Memory.Write((ulong)bufferPosition, Encoding.ASCII.GetBytes(alias + '\0'));
bufferPosition += alias.Length + 1;
}
// h_addrtype but it's a short (also only support IPv4)
context.Memory.Write((ulong)bufferPosition, BinaryPrimitives.ReverseEndianness((short)AddressFamily.InterNetwork));
bufferPosition += 2;
// h_length but it's a short
context.Memory.Write((ulong)bufferPosition, BinaryPrimitives.ReverseEndianness((short)4));
bufferPosition += 2;
// Ip address count, we can only support ipv4 (blame Nintendo)
context.Memory.Write((ulong)bufferPosition, addresses != null ? BinaryPrimitives.ReverseEndianness(addresses.Count()) : 0);
bufferPosition += 4;
if (addresses != null)
{
foreach (IPAddress ip in addresses)
{
context.Memory.Write((ulong)bufferPosition, BinaryPrimitives.ReverseEndianness(BitConverter.ToInt32(ip.GetAddressBytes(), 0)));
bufferPosition += 4;
}
}
return bufferPosition - originalBufferPosition;
}
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
{
netDbErrorCode = NetDbError.HostNotFound;
errno = GaiError.NoData;
hostEntry = Dns.GetHostEntry(targetHost);
}
else if (exception.ErrorCode == 11002)
catch (SocketException exception)
{
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;
netDbErrorCode = ConvertSocketErrorCodeToNetDbError(exception.ErrorCode);
errno = ConvertSocketErrorCodeToGaiError(exception.ErrorCode, errno);
}
}
}
@ -308,8 +455,10 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres
if (hostEntry != null)
{
errno = GaiError.Success;
serializedSize = SerializeHostEnt(context, hostEntry, GetIpv4Addresses(hostEntry));
int.TryParse(service, out int port);
errno = GaiError.Success;
serializedSize = SerializeAddrInfos(context, responseBufferPosition, responseBufferSize, hostEntry, port);
}
context.ResponseData.Write((int)netDbErrorCode);
@ -319,74 +468,101 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres
return ResultCode.Success;
}
[Command(4)]
// GetHostStringError(u32) -> buffer<unknown, 6, 0>
public ResultCode GetHostStringError(ServiceCtx context)
private void DeserializeAddrInfos(IVirtualMemoryManager memory, ulong address, ulong size)
{
ResultCode resultCode = ResultCode.NotAllocated;
NetDbError errorCode = (NetDbError)context.RequestData.ReadInt32();
string errorString = GetHostStringErrorFromErrorCode(errorCode);
ulong endAddress = address + size;
if (errorString.Length + 1 <= context.Request.ReceiveBuff[0].Size)
while (address < endAddress)
{
resultCode = 0;
context.Memory.Write((ulong)context.Request.ReceiveBuff[0].Position, Encoding.ASCII.GetBytes(errorString + '\0'));
AddrInfoSerializedHeader header = memory.Read<AddrInfoSerializedHeader>(address);
if (header.Magic != SfdnsresContants.AddrInfoMagic)
{
break;
}
address += (ulong)Unsafe.SizeOf<AddrInfoSerializedHeader>() + header.AddressLength;
// ai_canonname
string canonname = string.Empty;
while (true)
{
byte chr = memory.Read<byte>(address++);
if (chr == 0)
{
break;
}
canonname += (char)chr;
}
}
}
private ulong SerializeAddrInfos(ServiceCtx context, long responseBufferPosition, long responseBufferSize, IPHostEntry hostEntry, int port)
{
ulong originalBufferPosition = (ulong)responseBufferPosition;
ulong bufferPosition = originalBufferPosition;
string hostName = hostEntry.HostName + '\0';
for (int i = 0; i < hostEntry.AddressList.Length; i++)
{
IPAddress ip = hostEntry.AddressList[i];
if (ip.AddressFamily != AddressFamily.InterNetwork)
{
continue;
}
AddrInfoSerializedHeader header = new AddrInfoSerializedHeader(ip, 0);
// NOTE: 0 = Any
context.Memory.Write(bufferPosition, header);
bufferPosition += (ulong)Unsafe.SizeOf<AddrInfoSerializedHeader>();
// addrinfo_in
context.Memory.Write(bufferPosition, new AddrInfo4(ip, (short)port));
bufferPosition += header.AddressLength;
// ai_canonname
context.Memory.Write(bufferPosition, Encoding.ASCII.GetBytes(hostName));
bufferPosition += (ulong)hostName.Length;
}
return resultCode;
// Termination zero value.
context.Memory.Write(bufferPosition, 0);
bufferPosition += 4;
return bufferPosition - originalBufferPosition;
}
[Command(5)]
// GetGaiStringError(u32) -> buffer<unknown, 6, 0>
public ResultCode GetGaiStringError(ServiceCtx context)
private IEnumerable<IPAddress> GetIpv4Addresses(IPHostEntry hostEntry)
{
ResultCode resultCode = ResultCode.NotAllocated;
GaiError errorCode = (GaiError)context.RequestData.ReadInt32();
string errorString = GetGaiStringErrorFromErrorCode(errorCode);
return hostEntry.AddressList.Where(x => x.AddressFamily == AddressFamily.InterNetwork);
}
if (errorString.Length + 1 <= context.Request.ReceiveBuff[0].Size)
private NetDbError ConvertSocketErrorCodeToNetDbError(int errorCode)
{
return errorCode switch
{
resultCode = 0;
context.Memory.Write((ulong)context.Request.ReceiveBuff[0].Position, Encoding.ASCII.GetBytes(errorString + '\0'));
}
return resultCode;
11001 => NetDbError.HostNotFound,
11002 => NetDbError.TryAgain,
11003 => NetDbError.NoRecovery,
11004 => NetDbError.NoData,
_ => NetDbError.Internal
};
}
[Command(8)]
// RequestCancelHandle(u64, pid) -> u32
public ResultCode RequestCancelHandle(ServiceCtx context)
private GaiError ConvertSocketErrorCodeToGaiError(int errorCode, GaiError errno)
{
ulong unknown0 = context.RequestData.ReadUInt64();
context.ResponseData.Write(0);
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { unknown0 });
return ResultCode.Success;
}
[Command(9)]
// CancelSocketCall(u32, u64, pid)
public ResultCode CancelSocketCall(ServiceCtx context)
{
uint unknown0 = context.RequestData.ReadUInt32();
ulong unknown1 = context.RequestData.ReadUInt64();
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { unknown0, unknown1 });
return ResultCode.Success;
}
[Command(11)]
// ClearDnsAddresses(u32)
public ResultCode ClearDnsAddresses(ServiceCtx context)
{
uint unknown0 = context.RequestData.ReadUInt32();
Logger.Stub?.PrintStub(LogClass.ServiceSfdnsres, new { unknown0 });
return ResultCode.Success;
return errorCode switch
{
11001 => GaiError.NoData,
10060 => GaiError.Again,
_ => errno
};
}
}
}

28
Ryujinx.HLE/HOS/Services/Sockets/Sfdnsres/Proxy/DnsBlacklist.cs Normal file
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using System.Text.RegularExpressions;
namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres.Proxy
{
static class DnsBlacklist
{
private static readonly Regex[] BlockedHosts = new Regex[]
{
new Regex(@"^g(.*)\-lp1\.s\.n\.srv\.nintendo\.net$"),
new Regex(@"^(.*)\-sb\-api\.accounts\.nintendo\.com$"),
new Regex(@"^(.*)\-sb\.accounts\.nintendo\.com$"),
new Regex(@"^accounts\.nintendo\.com$")
};
public static bool IsHostBlocked(string host)
{
foreach (Regex regex in BlockedHosts)
{
if (regex.IsMatch(host))
{
return true;
}
}
return false;
}
}
}

29
Ryujinx.HLE/HOS/Services/Sockets/Sfdnsres/Types/AddrInfo4.cs Normal file
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using Ryujinx.Common.Memory;
using System;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;
namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres.Types
{
[StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0x10)]
struct AddrInfo4
{
public byte Length;
public byte Family;
public short Port;
public Array4<byte> Address;
public AddrInfo4(IPAddress address, short port)
{
Length = 0;
Family = (byte)AddressFamily.InterNetwork;
Port = port;
Address = default;
address.GetAddressBytes().AsSpan().CopyTo(Address.ToSpan());
Address.ToSpan().Reverse();
}
}
}

37
Ryujinx.HLE/HOS/Services/Sockets/Sfdnsres/Types/AddrInfoSerializedHeader.cs Normal file
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using System.Buffers.Binary;
using System.Net;
using System.Net.Sockets;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres.Types
{
[StructLayout(LayoutKind.Sequential, Pack = 1, Size = 6 * sizeof(int))]
struct AddrInfoSerializedHeader
{
public uint Magic;
public int Flags;
public int Family;
public int SocketType;
public int Protocol;
public uint AddressLength;
public AddrInfoSerializedHeader(IPAddress address, SocketType socketType)
{
Magic = (uint)BinaryPrimitives.ReverseEndianness(unchecked((int)SfdnsresContants.AddrInfoMagic));
Flags = 0; // Big Endian
Family = BinaryPrimitives.ReverseEndianness((int)address.AddressFamily);
SocketType = BinaryPrimitives.ReverseEndianness((int)socketType);
Protocol = 0; // Big Endian
if (address.AddressFamily == AddressFamily.InterNetwork)
{
AddressLength = (uint)Unsafe.SizeOf<AddrInfo4>();
}
else
{
AddressLength = 4;
}
}
}
}

7
Ryujinx.HLE/HOS/Services/Sockets/Sfdnsres/Types/SfdnsresContants.cs Normal file
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namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres.Types
{
static class SfdnsresContants
{
public const uint AddrInfoMagic = 0xBEEFCAFE;
}
}