int max_idle;
uint64_t datapath_id;
+ uint32_t capabilities;
time_t last_features_request;
struct mac_learning *ml; /* NULL to act as hub instead of switch. */
static void queue_tx(struct lswitch *, struct rconn *, struct ofpbuf *);
static void send_features_request(struct lswitch *, struct rconn *);
+static void process_switch_features(struct lswitch *, struct rconn *,
+ struct ofp_switch_features *);
static void process_packet_in(struct lswitch *, struct rconn *,
struct ofp_packet_in *);
static void process_echo_request(struct lswitch *, struct rconn *,
struct ofp_header *);
+static void process_port_status(struct lswitch *, struct rconn *,
+ struct ofp_port_status *);
+static void process_phy_port(struct lswitch *, struct rconn *,
+ const struct ofp_phy_port *);
/* Creates and returns a new learning switch.
*
}
}
+static size_t
+min_size(uint8_t type)
+{
+ return (type == OFPT_FEATURES_REPLY ? sizeof(struct ofp_switch_features)
+ : type == OFPT_PACKET_IN ? offsetof (struct ofp_packet_in, data)
+ : type == OFPT_PORT_STATUS ? sizeof(struct ofp_port_status)
+ : sizeof(struct ofp_header));
+}
+
/* Processes 'msg', which should be an OpenFlow received on 'rconn', according
* to the learning switch state in 'sw'. The most likely result of processing
* is that flow-setup and packet-out OpenFlow messages will be sent out on
lswitch_process_packet(struct lswitch *sw, struct rconn *rconn,
const struct ofpbuf *msg)
{
- static const size_t min_size[UINT8_MAX + 1] = {
- [0 ... UINT8_MAX] = sizeof (struct ofp_header),
- [OFPT_FEATURES_REPLY] = sizeof (struct ofp_switch_features),
- [OFPT_PACKET_IN] = offsetof (struct ofp_packet_in, data),
- };
struct ofp_header *oh;
oh = msg->data;
- if (msg->size < min_size[oh->type]) {
+ if (msg->size < min_size(oh->type)) {
VLOG_WARN_RL(&rl,
"%s: too short (%zu bytes) for type %"PRIu8" (min %zu)",
rconn_get_name(rconn),
- msg->size, oh->type, min_size[oh->type]);
+ msg->size, oh->type, min_size(oh->type));
return;
}
if (oh->type == OFPT_ECHO_REQUEST) {
process_echo_request(sw, rconn, msg->data);
} else if (oh->type == OFPT_FEATURES_REPLY) {
- struct ofp_switch_features *osf = msg->data;
- sw->datapath_id = osf->datapath_id;
+ process_switch_features(sw, rconn, msg->data);
} else if (sw->datapath_id == 0) {
send_features_request(sw, rconn);
} else if (oh->type == OFPT_PACKET_IN) {
process_packet_in(sw, rconn, msg->data);
+ } else if (oh->type == OFPT_PORT_STATUS) {
+ process_port_status(sw, rconn, msg->data);
} else {
if (VLOG_IS_DBG_ENABLED()) {
char *p = ofp_to_string(msg->data, msg->size, 2);
time_t now = time_now();
if (now >= sw->last_features_request + 1) {
struct ofpbuf *b;
- struct ofp_header *ofr;
struct ofp_switch_config *osc;
/* Send OFPT_FEATURES_REQUEST. */
- b = ofpbuf_new(0);
- ofr = ofpbuf_put_uninit(b, sizeof *ofr);
- memset(ofr, 0, sizeof *ofr);
- ofr->type = OFPT_FEATURES_REQUEST;
- ofr->version = OFP_VERSION;
- ofr->length = htons(sizeof *ofr);
+ make_openflow(sizeof(struct ofp_header), OFPT_FEATURES_REQUEST, &b);
queue_tx(sw, rconn, b);
/* Send OFPT_SET_CONFIG. */
- b = ofpbuf_new(0);
- osc = ofpbuf_put_uninit(b, sizeof *osc);
- memset(osc, 0, sizeof *osc);
- osc->header.type = OFPT_SET_CONFIG;
- osc->header.version = OFP_VERSION;
- osc->header.length = htons(sizeof *osc);
+ osc = make_openflow(sizeof *osc, OFPT_SET_CONFIG, &b);
osc->flags = htons(OFPC_SEND_FLOW_EXP);
osc->miss_send_len = htons(OFP_DEFAULT_MISS_SEND_LEN);
queue_tx(sw, rconn, b);
}
}
+static void
+process_switch_features(struct lswitch *sw, struct rconn *rconn,
+ struct ofp_switch_features *osf)
+{
+ size_t n_ports = ((ntohs(osf->header.length)
+ - offsetof(struct ofp_switch_features, ports))
+ / sizeof *osf->ports);
+ size_t i;
+
+ sw->datapath_id = osf->datapath_id;
+ sw->capabilities = ntohl(osf->capabilities);
+ for (i = 0; i < n_ports; i++) {
+ process_phy_port(sw, rconn, &osf->ports[i]);
+ }
+}
+
static void
process_packet_in(struct lswitch *sw, struct rconn *rconn,
struct ofp_packet_in *opi)
{
queue_tx(sw, rconn, make_echo_reply(rq));
}
+
+static void
+process_port_status(struct lswitch *sw, struct rconn *rconn,
+ struct ofp_port_status *ops)
+{
+ process_phy_port(sw, rconn, &ops->desc);
+}
+
+static void
+process_phy_port(struct lswitch *sw, struct rconn *rconn,
+ const struct ofp_phy_port *opp)
+{
+ if (sw->capabilities & OFPC_STP && ntohs(opp->port_no) < OFPP_MAX) {
+ uint32_t config = ntohl(opp->config);
+ uint32_t state = ntohl(opp->state);
+ uint32_t new_config = config & ~(OFPPC_NO_RECV | OFPPC_NO_RECV_STP
+ | OFPPC_NO_FWD | OFPPC_NO_PACKET_IN);
+ if (!(config & (OFPPC_NO_STP | OFPPC_PORT_DOWN))
+ && !(state & OFPPS_LINK_DOWN)) {
+ bool forward = false;
+ bool learn = false;
+ switch (state & OFPPS_STP_MASK) {
+ case OFPPS_STP_LISTEN:
+ case OFPPS_STP_BLOCK:
+ break;
+ case OFPPS_STP_LEARN:
+ learn = true;
+ break;
+ case OFPPS_STP_FORWARD:
+ forward = learn = true;
+ break;
+ }
+ if (!forward) {
+ new_config |= OFPPC_NO_RECV | OFPPC_NO_FWD;
+ }
+ if (!learn) {
+ new_config |= OFPPC_NO_PACKET_IN;
+ }
+ }
+ if (config != new_config) {
+ struct ofp_port_mod *opm;
+ struct ofpbuf *b;
+ int retval;
+
+ VLOG_WARN("port %d: config=%x new_config=%x",
+ ntohs(opp->port_no), config, new_config);
+ opm = make_openflow(sizeof *opm, OFPT_PORT_MOD, &b);
+ opm->port_no = opp->port_no;
+ memcpy(opm->hw_addr, opp->hw_addr, OFP_ETH_ALEN);
+ opm->config = htonl(new_config);
+ opm->mask = htonl(config ^ new_config);
+ opm->advertise = htonl(0);
+ retval = rconn_send(rconn, b, NULL);
+ if (retval) {
+ if (retval != ENOTCONN) {
+ VLOG_WARN_RL(&rl, "%s: send: %s",
+ rconn_get_name(rconn), strerror(retval));
+ }
+ ofpbuf_delete(b);
+ }
+ }
+ }
+}