You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: conn.go
    path of file: ./repos/wgnetwork/vendor/github.com/mdlayher/socket
    
    the code of the file until where you have to start completion: package socket

import (
	"context"
	"errors"
	"io"
	"os"
	"sync"
	"sync/atomic"
	"syscall"
	"time"

	"golang.org/x/sys/unix"
)

// Lock in an expected public interface for convenience
    
func (c *Conn) Connect(ctx context.Context, sa unix.Sockaddr) (unix.Sockaddr, error) {
	const op = "connect"

	// TODO(mdlayher): it would seem that trying to connect to unbound vsock
	// listeners by calling Connect multiple times results in ECONNRESET for the
	// first and nil error for subsequent calls. Do we need to memoize the
	// error? Check what the stdlib behavior is.

	var (
		// Track progress between invocations of the write closure. We don't
		// have an explicit WaitWrite call like internal/poll does, so we have
		// to wait until the runtime calls the closure again to indicate we can
		// write.
		progress uint32

		// Capture closure sockaddr and error.
		rsa unix.Sockaddr
		err error
	)

	doErr := c.write(ctx, op, func(fd int) error {
		if atomic.AddUint32(&progress, 1) == 1 {
			// First call: initiate connect.
			return unix.Connect(fd, sa)
		}

		// Subsequent calls: the runtime network poller indicates fd is
		// writable. Check for errno.
		errno, gerr := c.GetsockoptInt(unix.SOL_SOCKET, unix.SO_ERROR)
		if gerr != nil {
			return gerr
		}
		if errno != 0 {
			// Connection is still not ready or failed. If errno indicates
			// the socket is not ready, we will wait for the next write
			// event. Otherwise we propagate this errno back to the as a
			// permanent error.
			uerr := unix.Errno(errno)
			err = uerr
			return uerr
		}

		// According to internal/poll, it's possible for the runtime network
		// poller to spuriously wake us and return errno 0 for SO_ERROR.
		// Make sure we are actually connected to a peer.
		peer, err := c.Getpeername()
		if err != nil {
			// internal/poll unconditionally goes back to WaitWrite.
			// Synthesize an error that will do the same for us.
			return unix.EAGAIN
		}

		// Connection complete.
		rsa = peer
		return nil
	})
	if doErr != nil {
		// internal/poll or context error.
		return nil, doErr
	}

	if err == unix.EISCONN {
		// TODO(mdlayher): is this block obsolete with the addition of the
		// getsockopt SO_ERROR check above?
		//
		// EISCONN is reported if the socket is already established and should
		// not be treated as an error.
		//  - Darwin reports this for at least TCP sockets
		//  - Linux reports this for at least AF_VSOCK sockets
		return rsa, nil
	}

	return rsa, os.NewSyscallError(op, err)
}