X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fcfm.h;h=4bb8dc93ee71228ba8d3f9dd4afa1e63c6cf7c53;hb=eeba8e4fd3b9ae3c69fbf3ae9ef28a55184ac12a;hp=f7007bb9180097f7b53af3cc390c06e187bbd699;hpb=b31bcf60cf4fbabca0182196c97b3004e42f53e5;p=openvswitch

diff --git a/lib/cfm.h b/lib/cfm.h
index f7007bb9..4bb8dc93 100644
--- a/lib/cfm.h
+++ b/lib/cfm.h
@@ -20,9 +20,34 @@
 #include <stdint.h>
 
 #include "hmap.h"
-#include "packets.h"
+#include "openvswitch/types.h"
 
 struct flow;
+struct ofpbuf;
+struct ds;
+
+/* Ethernet destination address of CCM packets. */
+static const uint8_t eth_addr_ccm[6] OVS_UNUSED
+    = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x30 };
+
+#define ETH_TYPE_CFM 0x8902
+
+/* A 'ccm' represents a Continuity Check Message from the 802.1ag
+ * specification.  Continuity Check Messages are broadcast periodically so that
+ * hosts can determine who they have connectivity to. */
+#define CCM_LEN 74
+#define CCM_MAID_LEN 48
+struct ccm {
+    uint8_t  mdlevel_version; /* MD Level and Version */
+    uint8_t  opcode;
+    uint8_t  flags;
+    uint8_t  tlv_offset;
+    ovs_be32 seq;
+    ovs_be16 mpid;
+    uint8_t  maid[CCM_MAID_LEN];
+    uint8_t  zero[16]; /* Defined by ITU-T Y.1731 should be zero */
+} __attribute__((packed));
+BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm));
 
 /* A 'cfm' represent a local Maintenance Point (MP) and its Connectivity Fault
  * Management (CFM) state machine.  Its configuration variables should be set
@@ -32,12 +57,9 @@ struct cfm {
     uint16_t mpid;              /* The MPID of this CFM. */
     uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */
     int interval;               /* The requested transmission interval. */
-    uint8_t eth_src[ETH_ADDR_LEN];
 
     /* Statistics. */
     struct hmap remote_mps;     /* Expected remote MPs. */
-    struct hmap x_remote_mps;   /* Unexpected remote MPs. */
-    struct hmap x_remote_maids; /* Unexpected remote MAIDs. */
     bool fault;                 /* Indicates connectivity vaults. */
 };
 
@@ -47,24 +69,19 @@ struct remote_mp {
     uint16_t mpid;         /* The Maintenance Point ID of this 'remote_mp'. */
     struct hmap_node node; /* In 'cfm' 'remote_mps' or 'x_remote_mps'. */
 
-    long long recv_time; /* Time the most recent CCM was received. */
+    bool recv;           /* CCM was received since last fault check. */
     bool fault;          /* Indicates a connectivity fault. */
 };
 
-/* Remote MAIDs keep track of incoming CCM messages which have a different MAID
- * than this CFM instance. */
-struct remote_maid {
-    uint8_t maid[CCM_MAID_LEN]; /* The remote MAID. */
-    struct hmap_node node;      /* In 'cfm' 'x_remote_maids'. */
-
-    long long recv_time; /* Most recent receive time for this 'remote_maid'. */
-};
-
 struct cfm *cfm_create(void);
 
 void cfm_destroy(struct cfm *);
 
-struct ofpbuf *cfm_run(struct cfm *);
+void cfm_run(struct cfm *);
+
+bool cfm_should_send_ccm(struct cfm *);
+
+void cfm_compose_ccm(struct cfm *, struct ccm *);
 
 void cfm_wait(struct cfm *);
 
@@ -81,4 +98,6 @@ bool cfm_should_process_flow(const struct flow *);
 
 void cfm_process_heartbeat(struct cfm *, const struct ofpbuf *packet);
 
+void cfm_dump_ds(const struct cfm *, struct ds *);
+
 #endif /* cfm.h */