CODEWITHSUNDEEP
c++boost-asio
alex
alex

Reputation: 2482

Boost.Asio error code for "An existing connection was forcibly closed by the remote host"

In my tests my client gets occasionally, when trying to read from a boost socket, the error

An existing connection was forcibly closed by the remote host

I have several questions:

1) What is the Boost error code I have to check for which is associated with this message?

2) What is the analogue on Linux systems? Can I catch the same error code?

3) In the server's logs I do not see a successful connection. But the client returns successfully from its connection attempt. Also boost::asio::write() succeeds, but also here the server does not receive anything. But when trying to read from the socket (after the send), I get above error message.

What is going on?

Upvotes: 2

Views: 3514

Answers (1)

kenba
kenba

Reputation: 4539

In answer to your questions:

1) The boost error code is boost::asio::error::connection_reset; see boost/system/error_code.hpp.

2) The analogue on linux systems is ECONNRESET; see errno.h.

3) connection_reset is one of number of ways that a TCP socket can disconnect, see: How to detect when a boost TCP socket disconnects.

To determine precisely what is going on, I agree with @user and recommend that you install and use Wireshark to observe the TCP messages between your client and server.

Upvotes: 3

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