Add an SSL_has_pending() function

This is similar to SSL_pending() but just returns a 1 if there is data
pending in the internal OpenSSL buffers or 0 otherwise (as opposed to
SSL_pending() which returns the number of bytes available). Unlike
SSL_pending() this will work even if "read_ahead" is set (which is the
case if you are using read pipelining, or if you are doing DTLS). A 1
return value means that we have unprocessed data. It does *not* necessarily
indicate that there will be application data returned from a call to
SSL_read(). The unprocessed data may not be application data or there
could be errors when we attempt to parse the records.

Reviewed-by: Tim Hudson <tjh@openssl.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 94ea5ee..aa3daca 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -1408,6 +1408,7 @@ __owur const char *SSL_get_cipher_list(const SSL *s, int n);
 __owur char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len);
 __owur int SSL_get_read_ahead(const SSL *s);
 __owur int SSL_pending(const SSL *s);
+__owur int SSL_has_pending(const SSL *s);
 # ifndef OPENSSL_NO_SOCK
 __owur int SSL_set_fd(SSL *s, int fd);
 __owur int SSL_set_rfd(SSL *s, int fd);