MFC: r312825

Merge OpenSSL 1.0.2k.

4 files changed, 33 insertions, 42 deletions

diff --git a/crypto/openssl/doc/ssl/SSL_CTX_set_session_cache_mode.pod b/crypto/openssl/doc/ssl/SSL_CTX_set_session_cache_mode.pod
index c5d2f43..4d71f85 100644
--- a/crypto/openssl/doc/ssl/SSL_CTX_set_session_cache_mode.pod
+++ b/crypto/openssl/doc/ssl/SSL_CTX_set_session_cache_mode.pod
@@ -30,7 +30,7 @@ server. It can only send exactly one id.  The server then either
 agrees to reuse the session or it starts a full handshake (to create a new
 session).
 
-A server will lookup up the session in its internal session storage. If the
+A server will look up the session in its internal session storage. If the
 session is not found in internal storage or lookups for the internal storage
 have been deactivated (SSL_SESS_CACHE_NO_INTERNAL_LOOKUP), the server will try
 the external storage if available.
diff --git a/crypto/openssl/doc/ssl/SSL_get_error.pod b/crypto/openssl/doc/ssl/SSL_get_error.pod
index 48c6b15..2a93894 100644
--- a/crypto/openssl/doc/ssl/SSL_get_error.pod
+++ b/crypto/openssl/doc/ssl/SSL_get_error.pod
@@ -38,12 +38,13 @@ if and only if B<ret E<gt> 0>.
 
 =item SSL_ERROR_ZERO_RETURN
 
-The TLS/SSL connection has been closed.  If the protocol version is SSL 3.0
-or TLS 1.0, this result code is returned only if a closure
-alert has occurred in the protocol, i.e. if the connection has been
-closed cleanly. Note that in this case B<SSL_ERROR_ZERO_RETURN>
-does not necessarily indicate that the underlying transport
-has been closed.
+The TLS/SSL connection has been closed.
+If the protocol version is SSL 3.0 or higher, this result code is returned only
+if a closure alert has occurred in the protocol, i.e. if the connection has been
+closed cleanly.
+Note that in this case B<SSL_ERROR_ZERO_RETURN> does not necessarily
+indicate that the underlying transport has been closed.
+
 
 =item SSL_ERROR_WANT_READ, SSL_ERROR_WANT_WRITE
 
@@ -89,12 +90,9 @@ Details depend on the application.
 
 =item SSL_ERROR_SYSCALL
 
-Some I/O error occurred.  The OpenSSL error queue may contain more
-information on the error.  If the error queue is empty
-(i.e. ERR_get_error() returns 0), B<ret> can be used to find out more
-about the error: If B<ret == 0>, an EOF was observed that violates
-the protocol.  If B<ret == -1>, the underlying B<BIO> reported an
-I/O error (for socket I/O on Unix systems, consult B<errno> for details).
+Some non-recoverable I/O error occurred.
+The OpenSSL error queue may contain more information on the error.
+For socket I/O on Unix systems, consult B<errno> for details.
 
 =item SSL_ERROR_SSL
 
diff --git a/crypto/openssl/doc/ssl/SSL_read.pod b/crypto/openssl/doc/ssl/SSL_read.pod
index 8ca0ce5..ef983c9 100644
--- a/crypto/openssl/doc/ssl/SSL_read.pod
+++ b/crypto/openssl/doc/ssl/SSL_read.pod
@@ -81,33 +81,29 @@ The following return values can occur:
 
 =over 4
 
-=item E<gt>0
+=item E<gt> 0
 
-The read operation was successful; the return value is the number of
-bytes actually read from the TLS/SSL connection.
+The read operation was successful.
+The return value is the number of bytes actually read from the TLS/SSL
+connection.
 
-=item Z<>0
+=item Z<><= 0
 
-The read operation was not successful. The reason may either be a clean
-shutdown due to a "close notify" alert sent by the peer (in which case
-the SSL_RECEIVED_SHUTDOWN flag in the ssl shutdown state is set
-(see L<SSL_shutdown(3)|SSL_shutdown(3)>,
-L<SSL_set_shutdown(3)|SSL_set_shutdown(3)>). It is also possible, that
-the peer simply shut down the underlying transport and the shutdown is
-incomplete. Call SSL_get_error() with the return value B<ret> to find out,
-whether an error occurred or the connection was shut down cleanly
-(SSL_ERROR_ZERO_RETURN).
+
+=item E<lt>0
+
+The read operation was not successful, because either the connection was closed,
+an error occurred or action must be taken by the calling process.
+Call L<SSL_get_error(3)> with the return value B<ret> to find out the reason.
 
 SSLv2 (deprecated) does not support a shutdown alert protocol, so it can
 only be detected, whether the underlying connection was closed. It cannot
 be checked, whether the closure was initiated by the peer or by something
 else.
 
-=item E<lt>0
-
-The read operation was not successful, because either an error occurred
-or action must be taken by the calling process. Call SSL_get_error() with the
-return value B<ret> to find out the reason.
+Old documentation indicated a difference between 0 and -1, and that -1 was
+retryable.
+You should instead call SSL_get_error() to find out if it's retryable.
 
 =back
 
diff --git a/crypto/openssl/doc/ssl/SSL_write.pod b/crypto/openssl/doc/ssl/SSL_write.pod
index a57617f..4c1a7ee 100644
--- a/crypto/openssl/doc/ssl/SSL_write.pod
+++ b/crypto/openssl/doc/ssl/SSL_write.pod
@@ -74,27 +74,24 @@ The following return values can occur:
 
 =over 4
 
-=item E<gt>0
+=item E<gt> 0
 
 The write operation was successful, the return value is the number of
 bytes actually written to the TLS/SSL connection.
 
-=item Z<>0
+=item Z<><= 0
 
-The write operation was not successful. Probably the underlying connection
-was closed. Call SSL_get_error() with the return value B<ret> to find out,
-whether an error occurred or the connection was shut down cleanly
-(SSL_ERROR_ZERO_RETURN).
+The write operation was not successful, because either the connection was
+closed, an error occurred or action must be taken by the calling process.
+Call SSL_get_error() with the return value B<ret> to find out the reason.
 
 SSLv2 (deprecated) does not support a shutdown alert protocol, so it can
 only be detected, whether the underlying connection was closed. It cannot
 be checked, why the closure happened.
 
-=item E<lt>0
-
-The write operation was not successful, because either an error occurred
-or action must be taken by the calling process. Call SSL_get_error() with the
-return value B<ret> to find out the reason.
+Old documentation indicated a difference between 0 and -1, and that -1 was
+retryable.
+You should instead call SSL_get_error() to find out if it's retryable.
 
 =back