static bool
switch_status_remote_packet_cb(struct relay *r, void *ss_)
{
struct switch_status *ss = ss_;
struct rconn *rc = r->halves[HALF_REMOTE].rconn;
struct ofpbuf *msg = r->halves[HALF_REMOTE].rxbuf;
struct switch_status_category *c;
struct nicira_header *request;
struct nicira_header *reply;
struct status_reply sr;
struct ofpbuf *b;
int retval;
if (msg->size < sizeof(struct nicira_header)) {
return false;
}
request = msg->data;
if (request->header.type != OFPT_EXPERIMENTER
|| request->vendor != htonl(NX_VENDOR_ID)
|| request->subtype != htonl(NXT_STATUS_REQUEST)) {
return false;
}
sr.request.string = (void *) (request + 1);
sr.request.length = msg->size - sizeof *request;
ds_init(&sr.output);
for (c = ss->categories; c < &ss->categories[ss->n_categories]; c++) {
if (!memcmp(c->name, sr.request.string,
MIN(strlen(c->name), sr.request.length))) {
sr.category = c;
c->cb(&sr, c->aux);
}
}
reply = make_openflow_xid(sizeof *reply + sr.output.length,
OFPT_EXPERIMENTER, request->header.xid, &b);
reply->vendor = htonl(NX_VENDOR_ID);
reply->subtype = htonl(NXT_STATUS_REPLY);
memcpy(reply + 1, sr.output.string, sr.output.length);
retval = rconn_send(rc, b, NULL);
if (retval && retval != EAGAIN) {
VLOG_WARN(LOG_MODULE, "send failed (%s)", strerror(retval));
}
ds_destroy(&sr.output);
return true;
}
/* Takes care of necessary 'sw' activity, except for receiving packets (which
* the caller must do). */
void
lswitch_run(struct lswitch *sw, struct rconn *rconn)
{
long long int now = time_msec();
if (sw->ml) {
mac_learning_run(sw->ml, NULL);
}
/* If we're waiting for more replies, keeping waiting for up to 10 s. */
if (sw->last_reply != LLONG_MIN) {
if (now - sw->last_reply > 10000) {
VLOG_ERR_RL(&rl, "%012llx: No more flow stat replies last 10 s",
sw->datapath_id);
sw->last_reply = LLONG_MIN;
sw->last_query = LLONG_MIN;
schedule_query(sw, 0);
} else {
return;
}
}
/* If we're waiting for any reply at all, keep waiting for up to 10 s. */
if (sw->last_query != LLONG_MIN) {
if (now - sw->last_query > 10000) {
VLOG_ERR_RL(&rl, "%012llx: No flow stat replies in last 10 s",
sw->datapath_id);
sw->last_query = LLONG_MIN;
schedule_query(sw, 0);
} else {
return;
}
}
/* If it's time to send another query, do so. */
if (sw->next_query != LLONG_MIN && now >= sw->next_query) {
sw->next_query = LLONG_MIN;
if (!rconn_is_connected(rconn)) {
schedule_query(sw, 1000);
} else {
struct ofp_stats_request *osr;
struct ofp_flow_stats_request *ofsr;
struct ofpbuf *b;
int error;
VLOG_DBG("%012llx: Sending flow stats request to implement STP",
sw->datapath_id);
sw->last_query = now;
sw->query_xid = random_uint32();
sw->n_flows = 0;
sw->n_no_recv = 0;
sw->n_no_send = 0;
osr = make_openflow_xid(sizeof *osr + sizeof *ofsr,
OFPT_STATS_REQUEST, sw->query_xid, &b);
osr->type = htons(OFPST_FLOW);
osr->flags = htons(0);
ofsr = (struct ofp_flow_stats_request *) osr->body;
ofsr->match.wildcards = htonl(OFPFW_ALL);
ofsr->table_id = 0xff;
ofsr->out_port = htons(OFPP_NONE);
error = rconn_send(rconn, b, NULL);
if (error) {
VLOG_WARN_RL(&rl, "%012llx: sending flow stats request "
"failed: %s", sw->datapath_id, strerror(error));
ofpbuf_delete(b);
schedule_query(sw, 1000);
}
}
}
}