Fix some minor documentation issues

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

diff --git a/doc/ssl/SSL_shutdown.pod b/doc/ssl/SSL_shutdown.pod
index e205eac3091c27f9f99ec5a136cf2f980a15cd0b..b2bf9cb1b8a9844f02ea262992bf8372264424e2 100644 (file)
--- a/doc/ssl/SSL_shutdown.pod
+++ b/doc/ssl/SSL_shutdown.pod
@@ -38,7 +38,7 @@ behaviour.
 =over 4
 
 =item When the application is the first party to send the "close notify"
-alert, SSL_shutdown() will only send the alert and the set the
+alert, SSL_shutdown() will only send the alert and then set the
 SSL_SENT_SHUTDOWN flag (so that the session is considered good and will
 be kept in cache). SSL_shutdown() will then return with 0. If a unidirectional
 shutdown is enough (the underlying connection shall be closed anyway), this
@@ -49,17 +49,18 @@ shutdown alert. On success, the second call to SSL_shutdown() will return
 with 1.
 
 =item If the peer already sent the "close notify" alert B<and> it was
-already processed implicitly inside another call of e.g.
-B<SSL_read(3)|SSL_read(3)>, SSL_shutdown() will send the "close notify"
-alert, set the SSL_SENT_SHUTDOWN flag and will immediately return with 1.
+already processed implicitly inside another function
+(L<SSL_read(3)|SSL_read(3)>), the SSL_RECEIVED_SHUTDOWN flag is set.
+SSL_shutdown() will send the "close notify" alert, set the SSL_SENT_SHUTDOWN
+flag and will immediately return with 1.
+Whether SSL_RECEIVED_SHUTDOWN is already set can be checked using the
+SSL_get_shutdown() (see also L<SSL_set_shutdown(3)|SSL_set_shutdown(3)> call.
 
 =back
 
 It is therefore recommended, to check the return value of SSL_shutdown()
 and call SSL_shutdown() again, if the bidirectional shutdown is not yet
-complete (return value of the first call is 0). As the shutdown is not
-specially handled in the SSLv2 protocol, SSL_shutdown() will succeed on
-the first call.
+complete (return value of the first call is 0).
 
 The behaviour of SSL_shutdown() additionally depends on the underlying BIO. 
 
@@ -89,19 +90,19 @@ The following return values can occur:
 
 =over 4
 
-=item 1
-
-The shutdown was successfully completed. The "close notify" alert was sent
-and the peer's "close notify" alert was received.
-
-=item 0
+=item Z<>0
 
 The shutdown is not yet finished. Call SSL_shutdown() for a second time,
 if a bidirectional shutdown shall be performed.
 The output of L<SSL_get_error(3)|SSL_get_error(3)> may be misleading, as an
 erroneous SSL_ERROR_SYSCALL may be flagged even though no error occurred.
 
-=item -1
+=item Z<>1
+
+The shutdown was successfully completed. The "close notify" alert was sent
+and the peer's "close notify" alert was received.
+
+=item E<lt>0
 
 The shutdown was not successful because a fatal error occurred either
 at the protocol level or a connection failure occurred. It can also occur if