Added Heartbeat extension support.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/doc/cha-internals.texi b/doc/cha-internals.texi
index 69ac8fa13d..e6a01a4846 100644
--- a/doc/cha-internals.texi
+++ b/doc/cha-internals.texi
@@ -421,6 +421,31 @@ typedef enum
 @} gnutls_supplemental_data_format_type_t;
 @end example
 
+@subsubheading Heartbeat extension.
+
+One such extension is HeartBeat protocol (RFC6520:
+@url{https://tools.ietf.org/html/rfc6520}) implementation. To enable
+it use option --heartbeat with example client and server supplied with
+gnutls:
+
+@example
+./doc/credentials/gnutls-http-serv --priority "NORMAL:-CIPHER-ALL:+NULL" -d 100 --heartbeat --echo
+./src/gnutls-cli --priority "NORMAL:-CIPHER-ALL:+NULL" -d 100 localhost -p 5556 --insecure --heartbeat
+@end example
+
+After that pasting
+@example
+**HEARTBEAT**
+@end example
+command into gnutls-cli will trigger corresponding command on the server and it will send HeartBeat Request with random length to client.
+
+Another way is to run capabilities check with:
+
+@example
+./doc/credentials/gnutls-http-serv -d 100 --heartbeat
+./src/gnutls-cli-debug localhost -p 5556
+@end example
+
 @node Cryptographic Backend
 @section Cryptographic Backend
 Today most new processors, either for embedded or desktop systems