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authorkris <kris@FreeBSD.org>2001-05-20 03:07:21 +0000
committerkris <kris@FreeBSD.org>2001-05-20 03:07:21 +0000
commit12896e829e9474d92c70a1528cc64270e9dc08ad (patch)
treeaf21ae7d0d7d432ead379f1689adfee9ffe965f6 /crypto/openssl/doc/ssl/SSL_write.pod
parent7e55354aa4b06dead79c8a2c91756d71c0f02030 (diff)
downloadFreeBSD-src-12896e829e9474d92c70a1528cc64270e9dc08ad.zip
FreeBSD-src-12896e829e9474d92c70a1528cc64270e9dc08ad.tar.gz
Initial import of OpenSSL 0.9.6a
Diffstat (limited to 'crypto/openssl/doc/ssl/SSL_write.pod')
-rw-r--r--crypto/openssl/doc/ssl/SSL_write.pod23
1 files changed, 19 insertions, 4 deletions
diff --git a/crypto/openssl/doc/ssl/SSL_write.pod b/crypto/openssl/doc/ssl/SSL_write.pod
index 8110161..be1ad76 100644
--- a/crypto/openssl/doc/ssl/SSL_write.pod
+++ b/crypto/openssl/doc/ssl/SSL_write.pod
@@ -8,7 +8,7 @@ SSL_write - write bytes to a TLS/SSL connection.
#include <openssl/ssl.h>
- int SSL_write(SSL *ssl, char *buf, int num);
+ int SSL_write(SSL *ssl, const void *buf, int num);
=head1 DESCRIPTION
@@ -18,17 +18,29 @@ B<ssl> connection.
=head1 NOTES
If necessary, SSL_write() will negotiate a TLS/SSL session, if
-not already explicitly performed by SSL_connect() or SSL_accept(). If the
+not already explicitly performed by L<SSL_connect(3)|SSL_connect(3)> or
+L<SSL_accept(3)|SSL_accept(3)>. If the
peer requests a re-negotiation, it will be performed transparently during
the SSL_write() operation. The behaviour of SSL_write() depends on the
underlying BIO.
+For the transparent negotiation to succeed, the B<ssl> must have been
+initialized to client or server mode. This is not the case if a generic
+method is being used (see L<SSL_CTX_new(3)|SSL_CTX_new(3)>, so that
+L<SSL_set_connect_state(3)|SSL_set_connect_state(3)> or SSL_set_accept_state()
+must be used before the first call to an L<SSL_read(3)|SSL_read(3)>
+or SSL_write() function.
+
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()
-to continue the operation. In this case a call to SSL_get_error() with the
+to continue the operation. In this case a call to
+L<SSL_get_error(3)|SSL_get_error(3)> with the
return value of SSL_write() will yield B<SSL_ERROR_WANT_READ> or
B<SSL_ERROR_WANT_WRITE>. As at any time a re-negotiation is possible, a
call to SSL_write() can also cause read operations! The calling process
@@ -71,6 +83,9 @@ 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_CTX_new(3)|SSL_CTX_new(3)>,
+L<SSL_connect(3)|SSL_connect(3)>, L<SSL_accept(3)|SSL_accept(3)>
+L<SSL_set_connect_state(3)|SSL_set_connect_state(3)>,
L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>
=cut
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