+ return time_msec() >= cfmi->ccm_sent + cfmi->ccm_interval_ms;
+}
+
+/* Composes a CCM message into 'ccm'. Messages generated with this function
+ * should be sent whenever cfm_should_send_ccm() indicates. */
+void
+cfm_compose_ccm(struct cfm *cfm, struct ccm *ccm)
+{
+ struct cfm_internal *cfmi = cfm_to_internal(cfm);
+
+ cfmi->ccm_sent = time_msec();
+
+ ccm->mdlevel_version = 0;
+ ccm->opcode = CCM_OPCODE;
+ ccm->tlv_offset = 70;
+ ccm->seq = htonl(++cfmi->seq);
+ ccm->mpid = htons(cfmi->cfm.mpid);
+ ccm->flags = cfmi->ccm_interval;
+ memcpy(ccm->maid, cfmi->cfm.maid, sizeof ccm->maid);