Commit f282ca74 authored by Lutz Jänicke's avatar Lutz Jänicke
Browse files

New manual page: SSL_CTX_set_mode.

parent 67c18019
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=pod

=head1 NAME

SSL_CTX_set_mode, SSL_set_mode, SSL_CTX_get_mode, SSL_get_mode - manipulate SSL engine mode

=head1 SYNOPSIS

 #include <openssl/ssl.h>

 long SSL_CTX_set_mode(SSL_CTX *ctx, long mode);
 long SSL_set_mode(SSL *ssl, long mode);

 long SSL_CTX_get_mode(SSL_CTX *ctx);
 long SSL_get_mode(SSL *ssl);

=head1 DESCRIPTION

SSL_CTX_set_mode() adds the mode set via bitmask in B<mode> to B<ctx>.
Options already set before are not cleared.

SSL_set_mode() adds the mode set via bitmask in B<mode> to B<ssl>.
Options already set before are not cleared.

SSL_CTX_get_mode() returns the mode set for B<ctx>.

SSL_get_mode() returns the mode set for B<ssl>.

=head1 NOTES

The following mode changes are available:

=over 4

=item SSL_MODE_ENABLE_PARTIAL_WRITE

Allow SSL_write(..., n) to return r with 0 < r < n (i.e. report success
when just a single record has been written). When not set (the default),
SSL_write() will only report success once the complete chunk was written.

=item SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER

Make it possible to retry SSL_write() with changed buffer location
(the buffer contents must stay the same). This is not the default to avoid
the misconception that non-blocking SSL_write() behaves like
non-blocking write().

=item SSL_MODE_AUTO_RETRY

Never bother the application with retries if the transport is blocking.
If a renegotiation take place during normal operation, a
L<SSL_read(3)|SSL_read(3)> or L<SSL_write(3)|SSL_write(3)> would return
with -1 and indicate the need to retry with SSL_ERROR_WANT_READ.
In a non-blocking environment applications must be prepared to handle
incomplete read/write operations.
In a blocking environment, applications are not always prepared to
deal with read/write operations returning without success report. The
flag SSL_MODE_AUTO_RETRY will cause read/write operations to only
return after the handshake and successful completion.

=back

=head1 RETURN VALUES

SSL_CTX_set_mode() and SSL_set_mode() return the new mode bitmask
after adding B<mode>.

SSL_CTX_get_mode() and SSL_get_mode() return the current bitmask.

=head1 SEE ALSO

L<ssl(3)|ssl(3)>, L<SSL_read(3)|SSL_read(3)>, L<SSL_write(3)|SSL_write(3)>

=head1 HISTORY

SSL_MODE_AUTO_RETRY as been added in OpenSSL 0.9.6.

=cut
+5 −1
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@@ -24,7 +24,10 @@ the SSL_read() operation. The behaviour of SSL_read() depends on the
underlying BIO. 

If the underlying BIO is B<blocking>, SSL_read() will only return, once the
read operation has been finished or an error occurred.
read operation has been finished or an error occurred, except when a
renegotiation take place, in which case a SSL_ERROR_WANT_READ may occur. 
This behaviour can be controlled with the SSL_MODE_AUTO_RETRY flag of the
L<SSL_CTX_set_mode(3)|SSL_CTX_set_mode(3)> call.

If the underlying BIO is B<non-blocking>, SSL_read() will also return
when the underlying BIO could not satisfy the needs of SSL_read()
@@ -72,6 +75,7 @@ return value B<ret> to find out the reason.
=head1 SEE ALSO

L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_write(3)|SSL_write(3)>,
L<SSL_CTX_set_mode(3)|SSL_CTX_set_mode(3)>,
L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>

=cut
+5 −1
Original line number Diff line number Diff line
@@ -24,7 +24,10 @@ the SSL_write() operation. The behaviour of SSL_write() depends on the
underlying BIO. 

If the underlying BIO is B<blocking>, SSL_write() will only return, once the
write operation has been finished or an error occurred.
write operation has been finished or an error occurred, except when a
renegotiation take place, in which case a SSL_ERROR_WANT_READ may occur. 
This behaviour can be controlled with the SSL_MODE_AUTO_RETRY flag of the
L<SSL_CTX_set_mode(3)|SSL_CTX_set_mode(3)> call.

If the underlying BIO is B<non-blocking>, SSL_write() will also return,
when the underlying BIO could not satisfy the needs of SSL_write()
@@ -71,6 +74,7 @@ return value B<ret> to find out the reason.
=head1 SEE ALSO

L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_read(3)|SSL_read(3)>,
L<SSL_CTX_set_mode(3)|SSL_CTX_set_mode(3)>,
L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>

=cut
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@@ -663,6 +663,7 @@ L<SSL_CTX_sess_set_get_cb(3)|SSL_CTX_sess_set_get_cb(3)>,
L<SSL_CTX_sessions(3)|SSL_CTX_sessions(3)>,
L<SSL_CTX_set_client_CA_list(3)|SSL_CTX_set_client_CA_list(3)>,
L<SSL_CTX_set_default_passwd_cb(3)|SSL_CTX_set_default_passwd_cb(3)>,
L<SSL_CTX_set_mode(3)|SSL_CTX_set_mode(3)>,
L<SSL_CTX_set_options(3)|SSL_CTX_set_options(3)>,
L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>,
L<SSL_CTX_set_session_id_context(3)|SSL_CTX_set_session_id_context(3)>,