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Merge pull request #990 from donaldsharp/eigrp_cleanup

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Eigrp cleanup
This commit is contained in:
Russ White 2017-08-16 13:16:54 -04:00 committed by GitHub
commit 863f4bf143
4 changed files with 54 additions and 56 deletions
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5
eigrpd/eigrp_const.h
View File

@ -94,6 +94,11 @@
#define EIGRP_MULTICAST_ADDRESS 0xe000000A /*224.0.0.10*/
#define EIGRP_MAX_METRIC 0xffffffffU /*4294967295*/
enum metric_change {
METRIC_DECREASE,
METRIC_SAME,
METRIC_INCREASE
};
#define DEFAULT_ROUTE ZEBRA_ROUTE_MAX
#define DEFAULT_ROUTE_TYPE(T) ((T) == DEFAULT_ROUTE)

71
eigrpd/eigrp_fsm.c
View File

@ -185,6 +185,7 @@ int eigrp_get_fsm_event(struct eigrp_fsm_action_message *msg)
struct eigrp_prefix_entry *prefix = msg->prefix;
struct eigrp_neighbor_entry *entry = msg->entry;
u_char actual_state = prefix->state;
enum metric_change change;
if (entry == NULL) {
entry = eigrp_neighbor_entry_new();
@ -194,19 +195,18 @@ int eigrp_get_fsm_event(struct eigrp_fsm_action_message *msg)
msg->entry = entry;
}
// Dividing by actual state of prefix's FSM
/*
* Calculate resultant metrics and insert to correct position
* in entries list
*/
change = eigrp_topology_update_distance(msg);
switch (actual_state) {
case EIGRP_FSM_STATE_PASSIVE: {
// Calculate resultant metrics and insert to correct position in
// entries list
eigrp_topology_update_distance(msg);
struct eigrp_neighbor_entry *head =
(struct eigrp_neighbor_entry *)
entry->prefix->entries->head->data;
// zlog_info ("flag: %d rdist: %u dist: %u pfdist: %u pdist:
// %u", head->flags, head->reported_distance, head->distance,
// prefix->fdistance, prefix->distance);
if (head->reported_distance < prefix->fdistance) {
return EIGRP_FSM_KEEP_STATE;
}
@ -215,34 +215,31 @@ int eigrp_get_fsm_event(struct eigrp_fsm_action_message *msg)
* move to active state
* dependently if it was query from successor
*/
else {
if (msg->packet_type == EIGRP_OPC_QUERY) {
return EIGRP_FSM_EVENT_Q_FCN;
} else {
return EIGRP_FSM_EVENT_NQ_FCN;
}
if (msg->packet_type == EIGRP_OPC_QUERY) {
return EIGRP_FSM_EVENT_Q_FCN;
} else {
return EIGRP_FSM_EVENT_NQ_FCN;
}
break;
}
case EIGRP_FSM_STATE_ACTIVE_0: {
eigrp_topology_update_distance(msg);
if (msg->packet_type == EIGRP_OPC_REPLY) {
listnode_delete(prefix->rij, entry->adv_router);
if (prefix->rij->count) {
return EIGRP_FSM_KEEP_STATE;
} else {
zlog_info("All reply received\n");
if (((struct eigrp_neighbor_entry *)
prefix->entries->head->data)
->reported_distance
< prefix->fdistance) {
return EIGRP_FSM_EVENT_LR_FCS;
}
struct eigrp_neighbor_entry *head =
(struct eigrp_neighbor_entry *)
entry->prefix->entries->head->data;
return EIGRP_FSM_EVENT_LR_FCN;
listnode_delete(prefix->rij, entry->adv_router);
if (prefix->rij->count)
return EIGRP_FSM_KEEP_STATE;
zlog_info("All reply received\n");
if (head->reported_distance
< prefix->fdistance) {
return EIGRP_FSM_EVENT_LR_FCS;
}
return EIGRP_FSM_EVENT_LR_FCN;
} else if (msg->packet_type == EIGRP_OPC_QUERY
&& (entry->flags
& EIGRP_NEIGHBOR_ENTRY_SUCCESSOR_FLAG)) {
@ -254,15 +251,13 @@ int eigrp_get_fsm_event(struct eigrp_fsm_action_message *msg)
break;
}
case EIGRP_FSM_STATE_ACTIVE_1: {
int change = eigrp_topology_update_distance(msg);
if (msg->packet_type == EIGRP_OPC_QUERY
&& (entry->flags & EIGRP_NEIGHBOR_ENTRY_SUCCESSOR_FLAG)) {
return EIGRP_FSM_EVENT_QACT;
} else if (msg->packet_type == EIGRP_OPC_REPLY) {
listnode_delete(prefix->rij, entry->adv_router);
if (change == 1
if (change == METRIC_INCREASE
&& (entry->flags
& EIGRP_NEIGHBOR_ENTRY_SUCCESSOR_FLAG)) {
return EIGRP_FSM_EVENT_DINC;
@ -282,17 +277,17 @@ int eigrp_get_fsm_event(struct eigrp_fsm_action_message *msg)
break;
}
case EIGRP_FSM_STATE_ACTIVE_2: {
eigrp_topology_update_distance(msg);
if (msg->packet_type == EIGRP_OPC_REPLY) {
struct eigrp_neighbor_entry *head =
(struct eigrp_neighbor_entry *)
prefix->entries->head->data;
listnode_delete(prefix->rij, entry->adv_router);
if (prefix->rij->count) {
return EIGRP_FSM_KEEP_STATE;
} else {
zlog_info("All reply received\n");
if (((struct eigrp_neighbor_entry *)
prefix->entries->head->data)
->reported_distance
if (head->reported_distance
< prefix->fdistance) {
return EIGRP_FSM_EVENT_LR_FCS;
}
@ -305,12 +300,10 @@ int eigrp_get_fsm_event(struct eigrp_fsm_action_message *msg)
break;
}
case EIGRP_FSM_STATE_ACTIVE_3: {
int change = eigrp_topology_update_distance(msg);
if (msg->packet_type == EIGRP_OPC_REPLY) {
listnode_delete(prefix->rij, entry->adv_router);
if (change == 1
if (change == METRIC_INCREASE
&& (entry->flags
& EIGRP_NEIGHBOR_ENTRY_SUCCESSOR_FLAG)) {
return EIGRP_FSM_EVENT_DINC;

32
eigrpd/eigrp_topology.c
View File

@ -374,42 +374,42 @@ struct list *eigrp_neighbor_prefixes_lookup(struct eigrp *eigrp,
return prefixes;
}
int eigrp_topology_update_distance(struct eigrp_fsm_action_message *msg)
enum metric_change eigrp_topology_update_distance(struct eigrp_fsm_action_message *msg)
{
struct eigrp *eigrp = msg->eigrp;
struct eigrp_prefix_entry *prefix = msg->prefix;
struct eigrp_neighbor_entry *entry = msg->entry;
int change = 0;
enum metric_change change = METRIC_SAME;
assert(entry);
struct TLV_IPv4_External_type *ext_data = NULL;
struct TLV_IPv4_Internal_type *int_data = NULL;
if (msg->data_type == EIGRP_TLV_IPv4_INT) {
u_int32_t new_reported_distance;
int_data = msg->data.ipv4_int_type;
if (eigrp_metrics_is_same(int_data->metric,
entry->reported_metric)) {
return 0; // No change
return change; // No change
}
change = entry->reported_distance
< eigrp_calculate_metrics(
eigrp, int_data->metric)
? 1
: entry->reported_distance
> eigrp_calculate_metrics(
eigrp,
int_data->metric)
? 2
: 3; // Increase : Decrease : No
// change
new_reported_distance = eigrp_calculate_metrics(eigrp,
int_data->metric);
if (entry->reported_distance < new_reported_distance)
change = METRIC_INCREASE;
else
change = METRIC_DECREASE;
entry->reported_metric = int_data->metric;
entry->reported_distance =
entry->reported_distance = new_reported_distance;
eigrp_calculate_metrics(eigrp, int_data->metric);
entry->distance = eigrp_calculate_total_metrics(eigrp, entry);
} else {
ext_data = msg->data.ipv4_ext_data;
if (eigrp_metrics_is_same(ext_data->metric,
entry->reported_metric))
return 0;
return change;
}
/*
* Move to correct position in list according to new distance

2
eigrpd/eigrp_topology.h
View File

@ -60,7 +60,7 @@ extern struct list *eigrp_neighbor_prefixes_lookup(struct eigrp *,
struct eigrp_neighbor *);
extern void eigrp_topology_update_all_node_flags(struct eigrp *);
extern void eigrp_topology_update_node_flags(struct eigrp_prefix_entry *);
extern int eigrp_topology_update_distance(struct eigrp_fsm_action_message *);
extern enum metric_change eigrp_topology_update_distance(struct eigrp_fsm_action_message *);
extern void eigrp_update_routing_table(struct eigrp_prefix_entry *);
extern void eigrp_topology_neighbor_down(struct eigrp *,
struct eigrp_neighbor *);