* derivatives without specific, written prior permission.
*/
-#include <assert.h>
#include <errno.h>
#include <getopt.h>
-#include <inttypes.h>
-#include <netinet/in.h>
-#include <poll.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
#include "buffer.h"
#include "command-line.h"
#include "compiler.h"
#include "fault.h"
-#include "flow.h"
-#include "hash.h"
-#include "list.h"
-#include "ofp-print.h"
-#include "mac-learning.h"
-#include "openflow.h"
-#include "packets.h"
+#include "learning-switch.h"
#include "poll-loop.h"
-#include "queue.h"
-#include "time.h"
+#include "rconn.h"
#include "util.h"
#include "vconn-ssl.h"
#include "vconn.h"
#include "vlog-socket.h"
-#include "xtoxll.h"
#include "vlog.h"
#define THIS_MODULE VLM_controller
#define MAX_SWITCHES 16
-#define MAX_TXQ 128
+#define MAX_LISTENERS 16
struct switch_ {
- char *name;
- struct vconn *vconn;
-
- uint64_t datapath_id;
- time_t last_features_request;
-
- struct queue txq;
- struct mac_learning *ml;
+ struct lswitch *lswitch;
+ struct rconn *rconn;
};
/* Learn the ports on which MAC addresses appear? */
/* Set up flows? (If not, every packet is processed at the controller.) */
static bool setup_flows = true;
+static int do_switching(struct switch_ *);
+static void new_switch(struct switch_ *, struct vconn *, const char *name);
static void parse_options(int argc, char *argv[]);
static void usage(void) NO_RETURN;
-static struct switch_ *connect_switch(const char *name);
-static struct switch_ *new_switch(const char *name, struct vconn *);
-static void close_switch(struct switch_ *);
-
-static void queue_tx(struct switch_ *, struct buffer *);
-
-static void send_features_request(struct switch_ *);
-
-static int do_switch_recv(struct switch_ *this);
-static int do_switch_send(struct switch_ *this);
-
-static void process_packet(struct switch_ *, struct buffer *);
-static void process_packet_in(struct switch_ *, struct ofp_packet_in *);
-
int
main(int argc, char *argv[])
{
- struct switch_ *switches[MAX_SWITCHES];
- int n_switches;
+ struct switch_ switches[MAX_SWITCHES];
+ struct vconn *listeners[MAX_LISTENERS];
+ int n_switches, n_listeners;
int retval;
int i;
fatal(retval, "Could not listen for vlog connections");
}
- n_switches = 0;
- for (i = 0; i < argc - optind; i++) {
- struct switch_ *this = connect_switch(argv[optind + i]);
- if (this) {
+ n_switches = n_listeners = 0;
+ for (i = optind; i < argc; i++) {
+ const char *name = argv[i];
+ struct vconn *vconn;
+ int retval;
+
+ retval = vconn_open(name, &vconn);
+ if (retval) {
+ VLOG_ERR("%s: connect: %s", name, strerror(retval));
+ continue;
+ }
+
+ if (vconn_is_passive(vconn)) {
+ if (n_listeners >= MAX_LISTENERS) {
+ fatal(0, "max %d passive connections", n_listeners);
+ }
+ listeners[n_listeners++] = vconn;
+ } else {
if (n_switches >= MAX_SWITCHES) {
fatal(0, "max %d switch connections", n_switches);
}
- switches[n_switches++] = this;
+ new_switch(&switches[n_switches++], vconn, name);
}
}
- if (n_switches == 0) {
- fatal(0, "could not connect to any switches");
+ if (n_switches == 0 && n_listeners == 0) {
+ fatal(0, "no active or passive switch connections");
}
- while (n_switches > 0) {
- /* Do some work. Limit the number of iterations so that callbacks
- * registered with the poll loop don't starve. */
+ while (n_switches > 0 || n_listeners > 0) {
int iteration;
int i;
+
+ /* Accept connections on listening vconns. */
+ for (i = 0; i < n_listeners && n_switches < MAX_SWITCHES; ) {
+ struct vconn *new_vconn;
+ int retval;
+
+ retval = vconn_accept(listeners[i], &new_vconn);
+ if (!retval || retval == EAGAIN) {
+ if (!retval) {
+ new_switch(&switches[n_switches++], new_vconn, "tcp");
+ }
+ i++;
+ } else {
+ vconn_close(listeners[i]);
+ listeners[i] = listeners[--n_listeners];
+ }
+ }
+
+ /* Do some switching work. Limit the number of iterations so that
+ * callbacks registered with the poll loop don't starve. */
for (iteration = 0; iteration < 50; iteration++) {
bool progress = false;
for (i = 0; i < n_switches; ) {
- struct switch_ *this = switches[i];
- int retval;
-
- if (vconn_is_passive(this->vconn)) {
- retval = 0;
- while (n_switches < MAX_SWITCHES) {
- struct vconn *new_vconn;
- retval = vconn_accept(this->vconn, &new_vconn);
- if (retval) {
- break;
- }
- switches[n_switches++] = new_switch("tcp", new_vconn);
+ struct switch_ *this = &switches[i];
+ int retval = do_switching(this);
+ if (!retval || retval == EAGAIN) {
+ if (!retval) {
+ progress = true;
}
+ i++;
} else {
- retval = do_switch_recv(this);
- if (!retval || retval == EAGAIN) {
- do {
- retval = do_switch_send(this);
- if (!retval) {
- progress = true;
- }
- } while (!retval);
- }
- }
-
- if (retval && retval != EAGAIN) {
- close_switch(this);
+ lswitch_destroy(this->lswitch);
+ rconn_destroy(this->rconn);
switches[i] = switches[--n_switches];
- } else {
- i++;
}
}
if (!progress) {
}
/* Wait for something to happen. */
- for (i = 0; i < n_switches; i++) {
- struct switch_ *this = switches[i];
- if (vconn_is_passive(this->vconn)) {
- if (n_switches < MAX_SWITCHES) {
- vconn_accept_wait(this->vconn);
- }
- } else {
- vconn_recv_wait(this->vconn);
- if (this->txq.n) {
- vconn_send_wait(this->vconn);
- }
+ if (n_switches < MAX_SWITCHES) {
+ for (i = 0; i < n_listeners; i++) {
+ vconn_accept_wait(listeners[i]);
}
}
+ for (i = 0; i < n_switches; i++) {
+ struct switch_ *sw = &switches[i];
+ rconn_run_wait(sw->rconn);
+ rconn_recv_wait(sw->rconn);
+ }
poll_block();
}
return 0;
}
-static int
-do_switch_recv(struct switch_ *this)
-{
- struct buffer *msg;
- int retval;
-
- retval = vconn_recv(this->vconn, &msg);
- if (!retval) {
- process_packet(this, msg);
- buffer_delete(msg);
- }
- return retval;
-}
-
-static int
-do_switch_send(struct switch_ *this)
-{
- int retval = 0;
- if (this->txq.n) {
- struct buffer *next = this->txq.head->next;
- retval = vconn_send(this->vconn, this->txq.head);
- if (retval) {
- return retval;
- }
- queue_advance_head(&this->txq, next);
- return 0;
- }
- return EAGAIN;
-}
-
-struct switch_ *
-connect_switch(const char *name)
-{
- struct vconn *vconn;
- int retval;
-
- retval = vconn_open(name, &vconn);
- if (retval) {
- VLOG_ERR("%s: connect: %s", name, strerror(retval));
- return NULL;
- }
-
- return new_switch(name, vconn);
-}
-
-static struct switch_ *
-new_switch(const char *name, struct vconn *vconn)
-{
- struct switch_ *this = xmalloc(sizeof *this);
- memset(this, 0, sizeof *this);
- this->name = xstrdup(name);
- this->vconn = vconn;
- queue_init(&this->txq);
- this->last_features_request = 0;
- if (!vconn_is_passive(vconn)) {
- send_features_request(this);
- }
- if (learn_macs) {
- this->ml = mac_learning_create();
- }
- return this;
-}
-
static void
-close_switch(struct switch_ *this)
+new_switch(struct switch_ *sw, struct vconn *vconn, const char *name)
{
- if (this) {
- free(this->name);
- vconn_close(this->vconn);
- queue_destroy(&this->txq);
- mac_learning_destroy(this->ml);
- free(this);
- }
+ sw->rconn = rconn_new_from_vconn(name, 128, vconn);
+ sw->lswitch = lswitch_create(sw->rconn, learn_macs, setup_flows);
}
-static void
-send_features_request(struct switch_ *this)
-{
- time_t now = time(0);
- if (now >= this->last_features_request + 1) {
- struct buffer *b;
- struct ofp_header *ofr;
- struct ofp_switch_config *osc;
-
- /* Send OFPT_FEATURES_REQUEST. */
- b = buffer_new(0);
- ofr = buffer_put_uninit(b, sizeof *ofr);
- memset(ofr, 0, sizeof *ofr);
- ofr->type = OFPT_FEATURES_REQUEST;
- ofr->version = OFP_VERSION;
- ofr->length = htons(sizeof *ofr);
- queue_tx(this, b);
-
- /* Send OFPT_SET_CONFIG. */
- b = buffer_new(0);
- osc = buffer_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->flags = htons(OFPC_SEND_FLOW_EXP);
- osc->miss_send_len = htons(OFP_DEFAULT_MISS_SEND_LEN);
- queue_tx(this, b);
-
- this->last_features_request = now;
- }
-}
-
-static void
-queue_tx(struct switch_ *this, struct buffer *b)
-{
- queue_push_tail(&this->txq, b);
-}
-
-static void
-process_packet(struct switch_ *sw, struct buffer *msg)
+static int
+do_switching(struct switch_ *sw)
{
- 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]) {
- VLOG_WARN("%s: too short (%zu bytes) for type %"PRIu8" (min %zu)",
- sw->name, msg->size, oh->type, min_size[oh->type]);
- return;
- }
+ unsigned int packets_sent;
+ struct buffer *msg;
- if (oh->type == OFPT_FEATURES_REPLY) {
- struct ofp_switch_features *osf = msg->data;
- sw->datapath_id = osf->datapath_id;
- } else if (sw->datapath_id == 0) {
- send_features_request(sw);
- } else if (oh->type == OFPT_PACKET_IN) {
- struct ofp_packet_in *opi = msg->data;
- if (sw->txq.n >= MAX_TXQ) {
- /* FIXME: ratelimit. */
- VLOG_WARN("%s: tx queue overflow", sw->name);
- } else {
- process_packet_in(sw, opi);
- }
- } else {
- if (VLOG_IS_DBG_ENABLED()) {
- char *p = ofp_to_string(msg->data, msg->size, 2);
- VLOG_DBG("OpenFlow packet ignored: %s", p);
- free(p);
- }
- }
-}
+ packets_sent = rconn_packets_sent(sw->rconn);
-static void
-process_packet_in(struct switch_ *sw, struct ofp_packet_in *opi)
-{
- uint16_t in_port = ntohs(opi->in_port);
- uint16_t out_port = OFPP_FLOOD;
-
- size_t pkt_ofs, pkt_len;
- struct buffer pkt;
- struct flow flow;
-
- /* Extract flow data from 'opi' into 'flow'. */
- pkt_ofs = offsetof(struct ofp_packet_in, data);
- pkt_len = ntohs(opi->header.length) - pkt_ofs;
- pkt.data = opi->data;
- pkt.size = pkt_len;
- flow_extract(&pkt, in_port, &flow);
-
- if (learn_macs) {
- if (mac_learning_learn(sw->ml, flow.dl_src, in_port)) {
- VLOG_DBG("learned that "ETH_ADDR_FMT" is on datapath %"
- PRIx64" port %"PRIu16, ETH_ADDR_ARGS(flow.dl_src),
- ntohll(sw->datapath_id), in_port);
- }
- out_port = mac_learning_lookup(sw->ml, flow.dl_dst);
+ msg = rconn_recv(sw->rconn);
+ if (msg) {
+ lswitch_process_packet(sw->lswitch, sw->rconn, msg);
+ buffer_delete(msg);
}
+ rconn_run(sw->rconn);
- if (setup_flows && (!learn_macs || out_port != OFPP_FLOOD)) {
- /* The output port is known, or we always flood everything, so add a
- * new flow. */
- queue_tx(sw, make_add_simple_flow(&flow, ntohl(opi->buffer_id),
- out_port));
-
- /* If the switch didn't buffer the packet, we need to send a copy. */
- if (ntohl(opi->buffer_id) == UINT32_MAX) {
- queue_tx(sw, make_unbuffered_packet_out(&pkt, in_port, out_port));
- }
- } else {
- /* We don't know that MAC, or we don't set up flows. Send along the
- * packet without setting up a flow. */
- struct buffer *b;
- if (ntohl(opi->buffer_id) == UINT32_MAX) {
- b = make_unbuffered_packet_out(&pkt, in_port, out_port);
- } else {
- b = make_buffered_packet_out(ntohl(opi->buffer_id),
- in_port, out_port);
- }
- queue_tx(sw, b);
- }
+ return (!rconn_is_alive(sw->rconn) ? EOF
+ : rconn_packets_sent(sw->rconn) != packets_sent ? 0
+ : EAGAIN);
}
static void
fault.h \
flow.h \
hash.h \
+ learning-switch.h \
list.h \
mac-learning.h \
netdev.h \
--- /dev/null
+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ *
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
+ */
+
+#ifndef LEARNING_SWITCH_H
+#define LEARNING_SWITCH_H 1
+
+#include <stdbool.h>
+
+struct buffer;
+struct rconn;
+
+struct lswitch *lswitch_create(struct rconn *,
+ bool learn_macs, bool setup_flows);
+void lswitch_destroy(struct lswitch *);
+void lswitch_process_packet(struct lswitch *, struct rconn *,
+ const struct buffer *);
+
+#endif /* learning-switch.h */
int rconn_send(struct rconn *, struct buffer *);
int rconn_force_send(struct rconn *, struct buffer *);
bool rconn_is_full(const struct rconn *);
+unsigned int rconn_packets_sent(const struct rconn *);
const char *rconn_get_name(const struct rconn *);
bool rconn_is_alive(const struct rconn *);
bool rconn_is_connected(const struct rconn *);
+int rconn_disconnected_duration(const struct rconn *);
#endif /* rconn.h */
VLOG_MODULE(dpctl) \
VLOG_MODULE(fault) \
VLOG_MODULE(flow) \
+ VLOG_MODULE(learning_switch) \
VLOG_MODULE(mac_learning) \
VLOG_MODULE(netdev) \
VLOG_MODULE(netlink) \
fault.c \
flow.c \
hash.c \
+ learning-switch.c \
list.c \
mac-learning.c \
netdev.c \
--- /dev/null
+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ *
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
+ */
+
+#include "learning-switch.h"
+
+#include <errno.h>
+#include <inttypes.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "buffer.h"
+#include "flow.h"
+#include "mac-learning.h"
+#include "ofp-print.h"
+#include "openflow.h"
+#include "queue.h"
+#include "rconn.h"
+#include "vconn.h"
+#include "xtoxll.h"
+
+#define THIS_MODULE VLM_learning_switch
+#include "vlog.h"
+
+struct lswitch {
+ bool setup_flows; /* Set up flows? (or controller processes all packets) */
+ uint64_t datapath_id;
+ 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 buffer *);
+static void send_features_request(struct lswitch *, struct rconn *);
+static void process_packet_in(struct lswitch *, struct rconn *,
+ struct ofp_packet_in *);
+
+/* 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 'setup_flows' is true, the new switch will set up flows. 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, bool setup_flows)
+{
+ struct lswitch *sw = xmalloc(sizeof *sw);
+ memset(sw, 0, sizeof *sw);
+ sw->setup_flows = setup_flows;
+ sw->datapath_id = 0;
+ sw->last_features_request = 0;
+ sw->ml = learn_macs ? mac_learning_create() : NULL;
+ send_features_request(sw, rconn);
+ return sw;
+}
+
+/* Destroys 'sw'. */
+void
+lswitch_destroy(struct lswitch *sw)
+{
+ if (sw) {
+ mac_learning_destroy(sw->ml);
+ free(sw);
+ }
+}
+
+/* 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
+ * 'rconn'. */
+void
+lswitch_process_packet(struct lswitch *sw, struct rconn *rconn,
+ const struct buffer *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]) {
+ VLOG_WARN("%s: too short (%zu bytes) for type %"PRIu8" (min %zu)",
+ rconn_get_name(rconn),
+ msg->size, oh->type, min_size[oh->type]);
+ return;
+ }
+
+ if (oh->type == OFPT_FEATURES_REPLY) {
+ struct ofp_switch_features *osf = msg->data;
+ sw->datapath_id = osf->datapath_id;
+ } 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 (VLOG_IS_DBG_ENABLED()) {
+ char *p = ofp_to_string(msg->data, msg->size, 2);
+ VLOG_DBG("OpenFlow packet ignored: %s", p);
+ free(p);
+ }
+ }
+}
+\f
+static void
+send_features_request(struct lswitch *sw, struct rconn *rconn)
+{
+ time_t now = time(0);
+ if (now >= sw->last_features_request + 1) {
+ struct buffer *b;
+ struct ofp_header *ofr;
+ struct ofp_switch_config *osc;
+
+ /* Send OFPT_FEATURES_REQUEST. */
+ b = buffer_new(0);
+ ofr = buffer_put_uninit(b, sizeof *ofr);
+ memset(ofr, 0, sizeof *ofr);
+ ofr->type = OFPT_FEATURES_REQUEST;
+ ofr->version = OFP_VERSION;
+ ofr->length = htons(sizeof *ofr);
+ queue_tx(sw, rconn, b);
+
+ /* Send OFPT_SET_CONFIG. */
+ b = buffer_new(0);
+ osc = buffer_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->flags = htons(OFPC_SEND_FLOW_EXP);
+ osc->miss_send_len = htons(OFP_DEFAULT_MISS_SEND_LEN);
+ queue_tx(sw, rconn, b);
+
+ sw->last_features_request = now;
+ }
+}
+
+static void
+queue_tx(struct lswitch *sw, struct rconn *rconn, struct buffer *b)
+{
+ int retval = rconn_send(rconn, b);
+ if (retval) {
+ if (retval == EAGAIN) {
+ /* FIXME: ratelimit. */
+ VLOG_WARN("%s: tx queue overflow", rconn_get_name(rconn));
+ } else if (retval == ENOTCONN) {
+ /* Ignore. */
+ } else {
+ /* FIXME: ratelimit. */
+ VLOG_WARN("%s: send: %s", rconn_get_name(rconn), strerror(retval));
+ }
+ buffer_delete(b);
+ }
+}
+
+static void
+process_packet_in(struct lswitch *sw, struct rconn *rconn,
+ struct ofp_packet_in *opi)
+{
+ uint16_t in_port = ntohs(opi->in_port);
+ uint16_t out_port = OFPP_FLOOD;
+
+ size_t pkt_ofs, pkt_len;
+ struct buffer pkt;
+ struct flow flow;
+
+ /* Extract flow data from 'opi' into 'flow'. */
+ pkt_ofs = offsetof(struct ofp_packet_in, data);
+ pkt_len = ntohs(opi->header.length) - pkt_ofs;
+ pkt.data = opi->data;
+ pkt.size = pkt_len;
+ flow_extract(&pkt, in_port, &flow);
+
+ if (sw->ml) {
+ if (mac_learning_learn(sw->ml, flow.dl_src, in_port)) {
+ VLOG_DBG("learned that "ETH_ADDR_FMT" is on datapath %"
+ PRIx64" port %"PRIu16, ETH_ADDR_ARGS(flow.dl_src),
+ ntohll(sw->datapath_id), in_port);
+ }
+ out_port = mac_learning_lookup(sw->ml, flow.dl_dst);
+ }
+
+ if (sw->setup_flows && (!sw->ml || out_port != OFPP_FLOOD)) {
+ /* The output port is known, or we always flood everything, so add a
+ * new flow. */
+ queue_tx(sw, rconn, make_add_simple_flow(&flow, ntohl(opi->buffer_id),
+ out_port));
+
+ /* If the switch didn't buffer the packet, we need to send a copy. */
+ if (ntohl(opi->buffer_id) == UINT32_MAX) {
+ queue_tx(sw, rconn,
+ make_unbuffered_packet_out(&pkt, in_port, out_port));
+ }
+ } else {
+ /* We don't know that MAC, or we don't set up flows. Send along the
+ * packet without setting up a flow. */
+ struct buffer *b;
+ if (ntohl(opi->buffer_id) == UINT32_MAX) {
+ b = make_unbuffered_packet_out(&pkt, in_port, out_port);
+ } else {
+ b = make_buffered_packet_out(ntohl(opi->buffer_id),
+ in_port, out_port);
+ }
+ queue_tx(sw, rconn, b);
+ }
+}
int txq_limit;
time_t backoff_deadline;
int backoff;
+ time_t last_connected;
+ unsigned int packets_sent;
};
static struct rconn *create_rconn(const char *name, int txq_limit,
struct buffer *buffer;
int error = vconn_recv(rc->vconn, &buffer);
if (!error) {
+ rc->last_connected = time(0);
return buffer;
} else if (error != EAGAIN) {
disconnect(rc, error);
}
/* Sends 'b' on 'rc'. Returns 0 if successful, EAGAIN if the send queue is
- * full, otherwise a positive errno value.
+ * full, or ENOTCONN if 'rc' is not currently connected.
*
* There is no rconn_send_wait() function: an rconn has a send queue that it
* takes care of sending if you call rconn_wait(), which will have the side
return rc->txq.n >= rc->txq_limit;
}
+/* Returns the total number of packets successfully sent on the underlying
+ * vconn. A packet is not counted as sent while it is still queued in the
+ * rconn, only when it has been successfuly passed to the vconn. */
+unsigned int
+rconn_packets_sent(const struct rconn *rc)
+{
+ return rc->packets_sent;
+}
+
/* Returns 'rc''s name (the 'name' argument passed to rconn_new()). */
const char *
rconn_get_name(const struct rconn *rc)
{
return rconn->vconn && !vconn_connect(rconn->vconn);
}
+
+/* Returns 0 if 'rconn' is connected, otherwise the number of seconds that it
+ * has been disconnected. */
+int
+rconn_disconnected_duration(const struct rconn *rconn)
+{
+ return rconn_is_connected(rconn) ? 0 : time(0) - rconn->last_connected;
+}
\f
static struct rconn *
create_rconn(const char *name, int txq_limit, struct vconn *vconn)
rc->txq_limit = txq_limit;
rc->backoff_deadline = 0;
rc->backoff = 0;
+ rc->last_connected = time(0);
+ rc->packets_sent = 0;
return rc;
}
if (retval) {
return retval;
}
+ rc->packets_sent++;
queue_advance_head(&rc->txq, next);
return 0;
}
projects / openvswitch / commitdiff