/* Creates and returns a new learning switch.
*
* If 'learn_macs' is true, the new switch will learn the ports on which MAC
* addresses appear. Otherwise, the new switch will flood all packets.
*
* If 'max_idle' is nonnegative, the new switch will set up flows that expire
* after the given number of seconds (or never expire, if 'max_idle' is
* OFP_FLOW_PERMANENT). Otherwise, the new switch will process every packet.
*
* The caller may provide the file stream 'default_flows' that defines
* default flows that should be pushed when a switch connects. Each
* line is a flow entry in the format described for "add-flows" command
* in the Flow Syntax section of the ovs-ofct(8) man page. The caller
* is responsible for closing the stream.
*
* 'rconn' is used to send out an OpenFlow features request. */
struct lswitch *
lswitch_create(struct rconn *rconn, bool learn_macs,
bool exact_flows, int max_idle, bool action_normal,
FILE *default_flows)
{
struct lswitch *sw;
sw = xzalloc(sizeof *sw);
sw->max_idle = max_idle;
sw->datapath_id = 0;
sw->last_features_request = time_now() - 1;
sw->ml = learn_macs ? mac_learning_create() : NULL;
sw->action_normal = action_normal;
if (exact_flows) {
/* Exact match. */
sw->wildcards = 0;
} else {
/* We cannot wildcard all fields.
* We need in_port to detect moves.
* We need both SA and DA to do learning. */
sw->wildcards = (OFPFW_DL_TYPE | OFPFW_NW_SRC_MASK | OFPFW_NW_DST_MASK
| OFPFW_NW_PROTO | OFPFW_TP_SRC | OFPFW_TP_DST);
}
sw->queue = UINT32_MAX;
sw->queued = rconn_packet_counter_create();
send_features_request(sw, rconn);
if (default_flows) {
send_default_flows(sw, rconn, default_flows);
}
return sw;
}
static void
handle_switch_ready( uint64_t datapath_id, void *user_data ) {
UNUSED( user_data );
sw_entry *sw = update_sw_entry( &datapath_id );
debug( "Switch(%#" PRIx64 ") is connected.", datapath_id );
start_initial_discovery( sw );
send_features_request( sw );
}
/* Creates and returns a new mpls-enabled switch.
* 'rconn' is used to send out an OpenFlow features request. */
struct mpls_switch *
mpls_switch_create(struct rconn *rconn)
{
struct mpls_switch *sw;
sw = xcalloc(1, sizeof *sw);
sw->max_idle = OFP_FLOW_PERMANENT; // permanent flow
sw->datapath_id = 0;
sw->last_features_request = time_now() - 1;
send_features_request(sw, rconn);
return sw;
}
static void
lswitch_handshake(struct lswitch *sw)
{
enum ofputil_protocol protocol;
enum ofp_version version;
send_features_request(sw);
send_controller_id(sw);
version = rconn_get_version(sw->rconn);
protocol = ofputil_protocol_from_ofp_version(version);
if (sw->default_flows) {
struct ofpbuf *msg = NULL;
int error = 0;
size_t i;
if (!(protocol & sw->usable_protocols)) {
enum ofputil_protocol want = rightmost_1bit(sw->usable_protocols);
while (!error) {
msg = ofputil_encode_set_protocol(protocol, want, &protocol);
if (!msg) {
break;
}
error = rconn_send(sw->rconn, msg, NULL);
}
}
if (protocol & sw->usable_protocols) {
for (i = 0; !error && i < sw->n_default_flows; i++) {
msg = ofputil_encode_flow_mod(&sw->default_flows[i], protocol);
error = rconn_send(sw->rconn, msg, NULL);
}
if (error) {
VLOG_INFO_RL(&rl, "%s: failed to queue default flows (%s)",
rconn_get_name(sw->rconn), ovs_strerror(error));
}
} else {
VLOG_INFO_RL(&rl, "%s: failed to set usable protocol",
rconn_get_name(sw->rconn));
}
}
sw->protocol = protocol;
}
/* Creates and returns a new learning switch.
*
* If 'learn_macs' is true, the new switch will learn the ports on which MAC
* addresses appear. Otherwise, the new switch will flood all packets.
*
* If 'max_idle' is nonnegative, the new switch will set up flows that expire
* after the given number of seconds (or never expire, if 'max_idle' is
* OFP_FLOW_PERMANENT). Otherwise, the new switch will process every packet.
*
* 'rconn' is used to send out an OpenFlow features request. */
struct lswitch *
lswitch_create(struct rconn *rconn, bool learn_macs, int max_idle)
{
struct lswitch *sw;
size_t i;
sw = xcalloc(1, sizeof *sw);
sw->max_idle = max_idle;
sw->datapath_id = 0;
sw->last_features_request = time_now() - 1;
sw->ml = learn_macs ? mac_learning_create() : NULL;
sw->next_query = LLONG_MIN;
sw->last_query = LLONG_MIN;
sw->last_reply = LLONG_MIN;
for (i = 0; i < STP_MAX_PORTS; i++) {
sw->port_states[i] = P_DISABLED;
}
send_features_request(sw, rconn);
return sw;
}