[ovs-dev] [async 3/6] connmgr: New function ofconn_send_error().

[Ben Pfaff]

An upcoming commit will sometimes make connmgr responsible for sending
error replies, so it's reasonable for it to have a function to do that.
---
 ofproto/connmgr.c |   13 +++++++++++++
 ofproto/connmgr.h |    2 ++
 ofproto/ofproto.c |   13 +------------
 3 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/ofproto/connmgr.c b/ofproto/connmgr.c
index 403a140..bdebd3b 100644
--- a/ofproto/connmgr.c
+++ b/ofproto/connmgr.c
@@ -778,6 +778,19 @@ ofconn_send_replies(const struct ofconn *ofconn, struct list *replies)
     }
 }
 
+/* Sends 'error', which should be an OpenFlow error created with
+ * e.g. ofp_mkerr(), on 'ofconn', as a reply to 'request'.  Only at most the
+ * first 64 bytes of 'request' are used. */
+void
+ofconn_send_error(const struct ofconn *ofconn,
+                  const struct ofp_header *request, int error)
+{
+    struct ofpbuf *msg = ofputil_encode_error_msg(error, request);
+    if (msg) {
+        ofconn_send_reply(ofconn, msg);
+    }
+}
+
 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
 int
 ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id,
diff --git a/ofproto/connmgr.h b/ofproto/connmgr.h
index 9b2e9c5..4ac564c 100644
--- a/ofproto/connmgr.h
+++ b/ofproto/connmgr.h
@@ -88,6 +88,8 @@ void ofconn_set_miss_send_len(struct ofconn *, int miss_send_len);
 
 void ofconn_send_reply(const struct ofconn *, struct ofpbuf *);
 void ofconn_send_replies(const struct ofconn *, struct list *);
+void ofconn_send_error(const struct ofconn *, const struct ofp_header *request,
+                       int error);
 
 int ofconn_pktbuf_retrieve(struct ofconn *, uint32_t id,
                            struct ofpbuf **bufferp, uint16_t *in_port);
diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
index 1e5e4ec..3cfb6f4 100644
--- a/ofproto/ofproto.c
+++ b/ofproto/ofproto.c
@@ -1350,17 +1350,6 @@ rule_is_hidden(const struct rule *rule)
     return rule->cr.priority > UINT16_MAX;
 }
 
-static void
-send_error_oh(const struct ofconn *ofconn, const struct ofp_header *oh,
-              int error)
-{
-    struct ofpbuf *buf = ofputil_encode_error_msg(error, oh);
-    if (buf) {
-        COVERAGE_INC(ofproto_error);
-        ofconn_send_reply(ofconn, buf);
-    }
-}
-
 static int
 handle_echo_request(struct ofconn *ofconn, const struct ofp_header *oh)
 {
@@ -2510,7 +2499,7 @@ handle_openflow(struct ofconn *ofconn, struct ofpbuf *ofp_msg)
 {
     int error = handle_openflow__(ofconn, ofp_msg);
     if (error) {
-        send_error_oh(ofconn, ofp_msg->data, error);
+        ofconn_send_error(ofconn, ofp_msg->data, error);
     }
     COVERAGE_INC(ofproto_recv_openflow);
 }
-- 
1.7.4.4