X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fvconn.c;h=6af60e7e847dee67c0a753fa85024ee4e24c00d4;hb=bebf175930564a8eafdb63a0ad69df17d70ada18;hp=1fa83faeaedefcc71387a7c71f7bb3b0b2b96e43;hpb=88df6edbfaa4d4943e9f74f79973225c1c53297f;p=openvswitch

diff --git a/lib/vconn.c b/lib/vconn.c
index 1fa83fae..6af60e7e 100644
--- a/lib/vconn.c
+++ b/lib/vconn.c
@@ -440,6 +440,20 @@ make_buffered_packet_out(uint32_t buffer_id,
     return out;
 }
 
+/* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
+struct buffer *
+make_echo_request(void)
+{
+    struct ofp_header *rq;
+    struct buffer *out = buffer_new(sizeof *rq);
+    rq = buffer_put_uninit(out, sizeof *rq);
+    rq->version = OFP_VERSION;
+    rq->type = OFPT_ECHO_REQUEST;
+    rq->length = htons(sizeof *rq);
+    rq->xid = 0;
+    return out;
+}
+
 /* Creates and returns an OFPT_ECHO_REPLY message matching the
  * OFPT_ECHO_REQUEST message in 'rq'. */
 struct buffer *