#define STATES \
STATE(VOID, 1 << 0) \
STATE(BACKOFF, 1 << 1) \
- STATE(CONNECT_IN_PROGRESS, 1 << 3) \
+ STATE(CONNECTING, 1 << 3) \
STATE(ACTIVE, 1 << 4) \
STATE(IDLE, 1 << 5) \
STATE(RECONNECT, 1 << 6) \
int backoff;
long long int last_received;
long long int last_connected;
+ long long int last_disconnected;
unsigned int max_tries;
/* These values are simply for statistics reporting, not otherwise used
struct reconnect *fsm = xzalloc(sizeof *fsm);
fsm->name = xstrdup("void");
- fsm->min_backoff = 1000;
- fsm->max_backoff = 8000;
- fsm->probe_interval = 5000;
+ fsm->min_backoff = RECONNECT_DEFAULT_MIN_BACKOFF;
+ fsm->max_backoff = RECONNECT_DEFAULT_MAX_BACKOFF;
+ fsm->probe_interval = RECONNECT_DEFAULT_PROBE_INTERVAL;
fsm->passive = false;
fsm->info = VLL_INFO;
fsm->backoff = 0;
fsm->last_received = now;
fsm->last_connected = now;
+ fsm->last_disconnected = now;
fsm->max_tries = UINT_MAX;
fsm->creation_time = now;
}
/* Return the minimum number of milliseconds to back off between consecutive
- * connection attempts. The default is 1000 ms. */
+ * connection attempts. The default is RECONNECT_DEFAULT_MIN_BACKOFF. */
int
reconnect_get_min_backoff(const struct reconnect *fsm)
{
}
/* Return the maximum number of milliseconds to back off between consecutive
- * connection attempts. The default is 8000 ms. */
+ * connection attempts. The default is RECONNECT_DEFAULT_MAX_BACKOFF. */
int
reconnect_get_max_backoff(const struct reconnect *fsm)
{
* attempts.
*
* 'min_backoff' must be at least 1000, and 'max_backoff' must be greater than
- * or equal to 'min_backoff'. */
+ * or equal to 'min_backoff'.
+ *
+ * Pass 0 for 'min_backoff' or 'max_backoff' or both to use the defaults. */
void
reconnect_set_backoff(struct reconnect *fsm, int min_backoff, int max_backoff)
{
fsm->min_backoff = MAX(min_backoff, 1000);
- fsm->max_backoff = max_backoff ? MAX(max_backoff, 1000) : 8000;
+ fsm->max_backoff = (max_backoff
+ ? MAX(max_backoff, 1000)
+ : RECONNECT_DEFAULT_MAX_BACKOFF);
if (fsm->min_backoff > fsm->max_backoff) {
fsm->max_backoff = fsm->min_backoff;
}
fsm->passive = passive;
if (passive
- ? fsm->state & (S_CONNECT_IN_PROGRESS | S_RECONNECT)
+ ? fsm->state & (S_CONNECTING | S_RECONNECT)
: fsm->state == S_LISTENING && reconnect_may_retry(fsm)) {
reconnect_transition__(fsm, now, S_BACKOFF);
fsm->backoff = 0;
void
reconnect_force_reconnect(struct reconnect *fsm, long long int now)
{
- if (fsm->state & (S_CONNECT_IN_PROGRESS | S_ACTIVE | S_IDLE)) {
+ if (fsm->state & (S_CONNECTING | S_ACTIVE | S_IDLE)) {
reconnect_transition__(fsm, now, S_RECONNECT);
}
}
}
}
+ if (fsm->state & (S_ACTIVE | S_IDLE)) {
+ fsm->last_disconnected = now;
+ }
/* Back off. */
if (fsm->state & (S_ACTIVE | S_IDLE)
&& (fsm->last_received - fsm->last_connected >= fsm->backoff
void
reconnect_connecting(struct reconnect *fsm, long long int now)
{
- if (fsm->state != S_CONNECT_IN_PROGRESS) {
+ if (fsm->state != S_CONNECTING) {
if (fsm->passive) {
VLOG(fsm->info, "%s: listening...", fsm->name);
} else {
VLOG(fsm->info, "%s: connecting...", fsm->name);
}
- reconnect_transition__(fsm, now, S_CONNECT_IN_PROGRESS);
+ reconnect_transition__(fsm, now, S_CONNECTING);
}
}
reconnect_transition__(struct reconnect *fsm, long long int now,
enum state state)
{
- if (fsm->state == S_CONNECT_IN_PROGRESS) {
+ if (fsm->state == S_CONNECTING) {
fsm->n_attempted_connections++;
if (state == S_ACTIVE) {
fsm->n_successful_connections++;
case S_BACKOFF:
return fsm->state_entered + fsm->backoff;
- case S_CONNECT_IN_PROGRESS:
+ case S_CONNECTING:
return fsm->state_entered + MAX(1000, fsm->backoff);
case S_ACTIVE:
case S_BACKOFF:
return RECONNECT_CONNECT;
- case S_CONNECT_IN_PROGRESS:
+ case S_CONNECTING:
return RECONNECT_DISCONNECT;
case S_ACTIVE:
return reconnect_is_connected(fsm) ? now - fsm->last_connected : 0;
}
+/* Returns the number of milliseconds for which 'fsm' has been continuously
+ * disconnected from its peer. (If 'fsm' is not currently connected,
+ * this is 0.) */
+unsigned int
+reconnect_get_disconnect_duration(const struct reconnect *fsm,
+ long long int now)
+{
+ return reconnect_is_connected(fsm) ? 0 : now - fsm->last_disconnected;
+}
+
/* Copies various statistics for 'fsm' into '*stats'. */
void
reconnect_get_stats(const struct reconnect *fsm, long long int now,
stats->creation_time = fsm->creation_time;
stats->last_received = fsm->last_received;
stats->last_connected = fsm->last_connected;
+ stats->last_disconnected = fsm->last_disconnected;
stats->backoff = fsm->backoff;
stats->seqno = fsm->seqno;
stats->is_connected = reconnect_is_connected(fsm);
stats->current_connection_duration
= reconnect_get_connection_duration(fsm, now);
+ stats->current_disconnect_duration
+ = reconnect_get_disconnect_duration(fsm, now);
stats->total_connected_duration = (stats->current_connection_duration
+ fsm->total_connected_duration);
stats->n_attempted_connections = fsm->n_attempted_connections;