Re: [boost] [asio] SSL operation sporadically returns "Access is denied"

From: Christopher Kohlhoff (chris_at_[hidden])
Date: 2006-09-05 19:04:35

Hi Scott,

Scott <cheesy4poofs_at_[hidden]> wrote:
> However, I'm still getting random lockups when I enable SSL.
> The problems may very well stem from our code, but I've spent
> so much wasted time trying to track it down I'm hoping someone
> might be able to shed some light on why this happens.
[...]
> The asio::error object says "Access is denied".

The error is actually SSL_ERROR_SYSCALL (which is 5), and it's
showing up as "access denied" because it's not getting mapped
correctly. Can you try the changes to openssl_operation.hpp
shown below and see what you get as the real error. Thanks.

Cheers,
Chris

---------------------------------
@@ -25,6 +25,7 @@
 #include "asio/buffer.hpp"
 #include "asio/placeholders.hpp"
 #include "asio/write.hpp"
+#include "asio/detail/socket_ops.hpp"
 #include "asio/ssl/detail/openssl_types.hpp"

 namespace asio {
@@ -141,6 +142,7 @@
     int error_code =  !is_operation_done ?
           ::SSL_get_error( session_, rc ) :
           0;
+    int sys_error_code = asio::detail::socket_ops::get_error();
     bool is_read_needed = (error_code == SSL_ERROR_WANT_READ);
     bool is_write_needed = (error_code == SSL_ERROR_WANT_WRITE ||
                               ::BIO_ctrl_pending( ssl_bio_ ));
@@ -165,9 +167,14 @@

     if (!is_operation_done && !is_read_needed && !is_write_needed
       && !is_shut_down_sent)
+    {
       // The operation has failed... It is not completed and does
       // not want network communication nor does want to send shutdown out...
-      return handler_(asio::error(error_code), rc);
+      if (error_code == SSL_ERROR_SYSCALL)
+        return handler_(asio::error(sys_error_code), rc);
+      else
+        return handler_(asio::error(error_code + 1000000), rc);
+    }

     if (!is_operation_done && !is_write_needed)
     {