* a response. */
int probe_interval; /* Secs of inactivity before sending probe. */
+ /* When we create a vconn we obtain these values, to save them past the end
+ * of the vconn's lifetime. Otherwise, in-band control will only allow
+ * traffic when a vconn is actually open, but it is nice to allow ARP to
+ * complete even between connection attempts, and it is also polite to
+ * allow traffic from other switches to go through to the controller
+ * whether or not we are connected.
+ *
+ * We don't cache the local port, because that changes from one connection
+ * attempt to the next. */
+ uint32_t local_ip, remote_ip;
+ uint16_t remote_port;
+
/* Messages sent or received are copied to the monitor connections. */
#define MAX_MONITORS 8
struct vconn *monitors[8];
static unsigned int timeout(const struct rconn *);
static bool timed_out(const struct rconn *);
static void state_transition(struct rconn *, enum state);
+static void set_vconn_name(struct rconn *, const char *name);
static int try_send(struct rconn *);
static int reconnect(struct rconn *);
static void disconnect(struct rconn *, int error);
struct rconn *
rconn_create(int probe_interval, int max_backoff)
{
- struct rconn *rc = xcalloc(1, sizeof *rc);
+ struct rconn *rc = xzalloc(sizeof *rc);
rc->state = S_VOID;
rc->state_entered = time_now();
rconn_connect(struct rconn *rc, const char *name)
{
rconn_disconnect(rc);
- free(rc->name);
- rc->name = xstrdup(name);
+ set_vconn_name(rc, name);
rc->reliable = true;
return reconnect(rc);
}
{
assert(vconn != NULL);
rconn_disconnect(rc);
- free(rc->name);
- rc->name = xstrdup(name);
+ set_vconn_name(rc, name);
rc->reliable = false;
rc->vconn = vconn;
rc->last_connected = time_now();
vconn_close(rc->vconn);
rc->vconn = NULL;
}
- free(rc->name);
- rc->name = xstrdup("void");
+ set_vconn_name(rc, "void");
rc->reliable = false;
rc->backoff = 0;
rc->n_attempted_connections++;
retval = vconn_open(rc->name, OFP_VERSION, &rc->vconn);
if (!retval) {
+ rc->remote_ip = vconn_get_remote_ip(rc->vconn);
+ rc->local_ip = vconn_get_local_ip(rc->vconn);
+ rc->remote_port = vconn_get_remote_port(rc->vconn);
rc->backoff_deadline = time_now() + rc->backoff;
state_transition(rc, S_CONNECTING);
} else {
rconn_run(struct rconn *rc)
{
int old_state;
+ size_t i;
+
+ if (rc->vconn) {
+ vconn_run(rc->vconn);
+ }
+ for (i = 0; i < rc->n_monitors; i++) {
+ vconn_run(rc->monitors[i]);
+ }
+
do {
old_state = rc->state;
switch (rc->state) {
void
rconn_run_wait(struct rconn *rc)
{
- unsigned int timeo = timeout(rc);
+ unsigned int timeo;
+ size_t i;
+
+ if (rc->vconn) {
+ vconn_run_wait(rc->vconn);
+ }
+ for (i = 0; i < rc->n_monitors; i++) {
+ vconn_run_wait(rc->monitors[i]);
+ }
+
+ timeo = timeout(rc);
if (timeo != UINT_MAX) {
unsigned int expires = sat_add(rc->state_entered, timeo);
unsigned int remaining = sat_sub(expires, time_now());
int error = vconn_recv(rc->vconn, &buffer);
if (!error) {
copy_to_monitor(rc, buffer);
- if (is_admitted_msg(buffer)
+ if (rc->probably_admitted || is_admitted_msg(buffer)
|| time_now() - rc->last_connected >= 30) {
rc->probably_admitted = true;
rc->last_admitted = time_now();
return is_connected_state(rconn->state);
}
-/* Returns 0 if 'rconn' is connected. Otherwise, if 'rconn' is in a "failure
- * mode" (that is, it is not connected), returns the number of seconds that it
- * has been in failure mode, ignoring any times that it connected but the
- * controller's admission control policy caused it to be quickly
- * disconnected. */
+/* Returns true if 'rconn' is connected and thought to have been accepted by
+ * the peer's admission-control policy. */
+bool
+rconn_is_admitted(const struct rconn *rconn)
+{
+ return (rconn_is_connected(rconn)
+ && rconn->last_admitted >= rconn->last_connected);
+}
+
+/* Returns 0 if 'rconn' is currently connected and considered to have been
+ * accepted by the peer's admission-control policy, otherwise the number of
+ * seconds since 'rconn' was last in such a state. */
int
rconn_failure_duration(const struct rconn *rconn)
{
- return rconn_is_connected(rconn) ? 0 : time_now() - rconn->last_admitted;
+ return rconn_is_admitted(rconn) ? 0 : time_now() - rconn->last_admitted;
}
-/* Returns the IP address of the peer, or 0 if the peer is not connected over
- * an IP-based protocol or if its IP address is not known. */
+/* Returns the IP address of the peer, or 0 if the peer's IP address is not
+ * known. */
uint32_t
rconn_get_remote_ip(const struct rconn *rconn)
{
- return rconn->vconn ? vconn_get_remote_ip(rconn->vconn) : 0;
+ return rconn->remote_ip;
}
-/* Returns the transport port of the peer, or 0 if the peer does not
- * contain a port or if the port is not known. */
+/* Returns the transport port of the peer, or 0 if the peer's port is not
+ * known. */
uint16_t
rconn_get_remote_port(const struct rconn *rconn)
{
- return rconn->vconn ? vconn_get_remote_port(rconn->vconn) : 0;
+ return rconn->remote_port;
}
/* Returns the IP address used to connect to the peer, or 0 if the
uint32_t
rconn_get_local_ip(const struct rconn *rconn)
{
- return rconn->vconn ? vconn_get_local_ip(rconn->vconn) : 0;
+ return rconn->local_ip;
}
/* Returns the transport port used to connect to the peer, or 0 if the
}
}
\f
+/* Set the name of the remote vconn to 'name' and clear out the cached IP
+ * address and port information, since changing the name also likely changes
+ * these values. */
+static void
+set_vconn_name(struct rconn *rc, const char *name)
+{
+ free(rc->name);
+ rc->name = xstrdup(name);
+ rc->local_ip = 0;
+ rc->remote_ip = 0;
+ rc->remote_port = 0;
+}
+
/* Tries to send a packet from 'rc''s send buffer. Returns 0 if successful,
* otherwise a positive errno value. */
static int
git://git.onelab.eu / sliver-openvswitch.git / blobdiff