Clarifications and new documents.

[openssl.git] / doc / ssl / SSL_write.pod

diff --git a/doc/ssl/SSL_write.pod b/doc/ssl/SSL_write.pod
index b086258e82e4388c5e04c94cf14fa794d97b29cd..0a1adaba7327b2259d8b550911ee6be0e258cd92 100644 (file)
--- a/doc/ssl/SSL_write.pod
+++ b/doc/ssl/SSL_write.pod
@@ -13,7 +13,11 @@ SSL_read - write bytes to a TLS/SSL connection.
 =head1 DESCRIPTION
 
 SSL_write() writes B<num> bytes from the buffer B<buf> into the specified
-B<ssl>. If necessary, SSL_write() will negotiate a TLS/SSL session, if
+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
 peer requests a re-negotiation, it will be performed transparently during
 the SSL_write() operation. The behaviour of SSL_write() depends on the
@@ -34,6 +38,12 @@ 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.
 
+=head1 IMPORTANT
+
+When an SSL_write() operation has to be repeated because of
+B<SSL_ERROR_WANT_READ> or B<SSL_ERROR_WANT_WRITE>, it must be repeated
+with the same arguments.
+
 =head1 RETURN VALUES
 
 The following return values can occur: