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author | Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org> | 2021-04-30 00:33:56 +0200 |
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committer | Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org> | 2021-04-30 00:33:56 +0200 |
commit | aa4d426b4d3527d7e166df1a05058c9a4a0f6683 (patch) | |
tree | 4ff17ce8b89a2321b9d0ed4bcfc37c447bcb6820 /openssl-1.1.0h/doc/ssl/SSL_get_all_async_fds.pod | |
download | smtps-and-pop3s-console-program-master.tar.gz smtps-and-pop3s-console-program-master.zip |
Diffstat (limited to 'openssl-1.1.0h/doc/ssl/SSL_get_all_async_fds.pod')
-rw-r--r-- | openssl-1.1.0h/doc/ssl/SSL_get_all_async_fds.pod | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/openssl-1.1.0h/doc/ssl/SSL_get_all_async_fds.pod b/openssl-1.1.0h/doc/ssl/SSL_get_all_async_fds.pod new file mode 100644 index 0000000..b4fa4ee --- /dev/null +++ b/openssl-1.1.0h/doc/ssl/SSL_get_all_async_fds.pod @@ -0,0 +1,88 @@ +=pod + +=head1 NAME + +SSL_waiting_for_async, +SSL_get_all_async_fds, +SSL_get_changed_async_fds +- manage asynchronous operations + +=for comment multiple includes + +=head1 SYNOPSIS + + #include <openssl/async.h> + #include <openssl/ssl.h> + + int SSL_waiting_for_async(SSL *s); + int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fd, size_t *numfds); + int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds, + OSSL_ASYNC_FD *delfd, size_t *numdelfds); + +=head1 DESCRIPTION + +SSL_waiting_for_async() determines whether an SSL connection is currently +waiting for asynchronous operations to complete (see the SSL_MODE_ASYNC mode in +L<SSL_CTX_set_mode(3)>). + +SSL_get_all_async_fds() returns a list of file descriptor which can be used in a +call to select() or poll() to determine whether the current asynchronous +operation has completed or not. A completed operation will result in data +appearing as "read ready" on the file descriptor (no actual data should be read +from the file descriptor). This function should only be called if the SSL object +is currently waiting for asynchronous work to complete (i.e. +SSL_ERROR_WANT_ASYNC has been received - see L<SSL_get_error(3)>). Typically the +list will only contain one file descriptor. However if multiple asynchronous +capable engines are in use then more than one is possible. The number of file +descriptors returned is stored in B<*numfds> and the file descriptors themselves +are in B<*fds>. The B<fds> parameter may be NULL in which case no file +descriptors are returned but B<*numfds> is still populated. It is the callers +responsibility to ensure sufficient memory is allocated at B<*fds> so typically +this function is called twice (once with a NULL B<fds> parameter and once +without). + +SSL_get_changed_async_fds() returns a list of the asynchronous file descriptors +that have been added and a list that have been deleted since the last +SSL_ERROR_WANT_ASYNC was received (or since the SSL object was created if no +SSL_ERROR_WANT_ASYNC has been received). Similar to SSL_get_all_async_fds() it +is the callers responsibility to ensure that B<*addfd> and B<*delfd> have +sufficient memory allocated, although they may be NULL. The number of added fds +and the number of deleted fds are stored in B<*numaddfds> and B<*numdelfds> +respectively. + +=head1 RETURN VALUES + +SSL_waiting_for_async() will return 1 if the current SSL operation is waiting +for an async operation to complete and 0 otherwise. + +SSL_get_all_async_fds() and SSL_get_changed_async_fds() return 1 on success or +0 on error. + +=head1 NOTES + +On Windows platforms the openssl/async.h header is dependent on some +of the types customarily made available by including windows.h. The +application developer is likely to require control over when the latter +is included, commonly as one of the first included headers. Therefore +it is defined as an application developer's responsibility to include +windows.h prior to async.h. + +=head1 SEE ALSO + +L<SSL_get_error(3)>, L<SSL_CTX_set_mode(3)> + +=head1 HISTORY + +SSL_waiting_for_async(), SSL_get_all_async_fds() and SSL_get_changed_async_fds() +were first added to OpenSSL 1.1.0. + +=head1 COPYRIGHT + +Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. + +Licensed under the OpenSSL license (the "License"). You may not use +this file except in compliance with the License. You can obtain a copy +in the file LICENSE in the source distribution or at +L<https://www.openssl.org/source/license.html>. + +=cut |