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-rw-r--r--crypto/openssl/doc/ssl/SSL_write.pod11
1 files changed, 11 insertions, 0 deletions
diff --git a/crypto/openssl/doc/ssl/SSL_write.pod b/crypto/openssl/doc/ssl/SSL_write.pod
index be1ad76..b0dfefa 100644
--- a/crypto/openssl/doc/ssl/SSL_write.pod
+++ b/crypto/openssl/doc/ssl/SSL_write.pod
@@ -50,6 +50,17 @@ non-blocking socket, nothing is to be done, but select() can be used to check
for the required condition. When using a buffering BIO, like a BIO pair, data
must be written into or retrieved out of the BIO before being able to continue.
+SSL_write() will only return with success, when the complete contents
+of B<buf> of length B<num> has been written. This default behaviour
+can be changed with the SSL_MODE_ENABLE_PARTIAL_WRITE option of
+L<SSL_CTX_set_mode(3)|SSL_CTX_set_mode(3)>. When this flag is set,
+SSL_write() will also return with success, when a partial write has been
+successfully completed. In this case the SSL_write() operation is considered
+completed. The bytes are sent and a new SSL_write() operation with a new
+buffer (with the already sent bytes removed) must be started.
+A partial write is performed with the size of a message block, which is
+16kB for SSLv3/TLSv1.
+
=head1 WARNING
When an SSL_write() operation has to be repeated because of
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