This is outcome of dotnet/corefx#37486. Even if that aimed to fix Synchronous blocking calls, it also impacts Async operations:
let say there is simple receiver app:
using System;
using System.Net;
using System.Net.Sockets;
namespace Receiver
{
class Program
{
static void Main(string[] args)
{
Socket l = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
l.Bind(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8888));
l.Listen(1);
Socket s = l.Accept();
Console.WriteLine("got socket!");
byte[] buffer = new byte[1000];
int rlen = 0;
do {
rlen = s.Receive(buffer, SocketFlags.None);
}
while (rlen > 0);
Console.WriteLine("All done");
}
}and then sender using Async IO.
using System;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;
namespace dotnet_latest
{
class Program
{
static async Task reader(Socket s)
{
byte[] buffer = new byte[1000];
int readLength=0;
do
{
readLength = await s.ReceiveAsync(buffer, SocketFlags.None);
Console.WriteLine("Got {0} bytes", readLength);
}
while (readLength > 0);
Console.WriteLine("Reader all done");
}
static void Main(string[] args)
{
Socket s= new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
s.Connect(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8888));
Task.Run(() => reader(s));
Console.WriteLine("Hello World!");
Console.ReadLine();
s.Close();
}
}
}before the change the receiver would simply finish after hitting enter on sending side.
with the latest socket call it fails:
Unhandled exception. System.Net.Sockets.SocketException (104): Connection reset by peer
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.Net.Sockets.Socket.Receive(Byte[] buffer, SocketFlags socketFlags)
at Receiver.Program.Main(String[] args) in /home/furt/abcd/Program.cs:line 21
It seems like we send reset when we should not.
cc: @tmds @davidsh @stephentoub
This is outcome of dotnet/corefx#37486. Even if that aimed to fix Synchronous blocking calls, it also impacts Async operations:
let say there is simple receiver app:
and then sender using Async IO.
before the change the receiver would simply finish after hitting enter on sending side.
with the latest socket call it fails:
It seems like we send reset when we should not.
cc: @tmds @davidsh @stephentoub