/* Number of milliseconds between runs of the maintenance thread. */
#define MAINT_SLEEP_MSECS 1000
-enum br_port_flags {
- BRPF_NO_FLOOD = 1 << 0,
-};
-
-enum br_port_status {
- BRPS_PORT_DOWN = 1 << 0,
- BRPS_LINK_DOWN = 1 << 1,
-};
-
#define UINT32_MAX 4294967295U
#define UINT16_MAX 65535
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
-struct net_bridge_port {
- u16 port_no;
- u32 flags; /* BRPF_* flags */
- u32 status; /* BRPS_* flags */
- spinlock_t lock;
- struct work_struct port_task;
- struct datapath *dp;
- struct net_device *dev;
- struct list_head node; /* Element in datapath.ports. */
-};
-
static struct genl_family dp_genl_family;
static struct genl_multicast_group mc_group;
{
/* Push the Ethernet header back on. */
skb_push(skb, ETH_HLEN);
- fwd_port_input(p->dp->chain, skb, p->port_no);
+ fwd_port_input(p->dp->chain, skb, p);
}
/*
static int
output_all(struct datapath *dp, struct sk_buff *skb, int flood)
{
- u32 disable = flood ? BRPF_NO_FLOOD : 0;
+ u32 disable = flood ? OFPPFL_NO_FLOOD : 0;
struct net_bridge_port *p;
int prev_port = -1;
kfree_skb(skb);
return -ENOMEM;
}
- dp_output_port(dp, clone, prev_port);
+ dp_output_port(dp, clone, prev_port, 0);
}
prev_port = p->port_no;
}
if (prev_port != -1)
- dp_output_port(dp, skb, prev_port);
+ dp_output_port(dp, skb, prev_port, 0);
else
kfree_skb(skb);
/* Takes ownership of 'skb' and transmits it to 'out_port' on 'dp'.
*/
-int dp_output_port(struct datapath *dp, struct sk_buff *skb, int out_port)
+int dp_output_port(struct datapath *dp, struct sk_buff *skb, int out_port,
+ int ignore_no_fwd)
{
BUG_ON(!skb);
switch (out_port){
return xmit_skb(skb);
case OFPP_TABLE: {
- struct net_bridge_port *p = skb->dev->br_port;
- int retval;
- retval = run_flow_through_tables(dp->chain, skb,
- p ? p->port_no : OFPP_LOCAL);
+ int retval = run_flow_through_tables(dp->chain, skb,
+ skb->dev->br_port);
if (retval)
kfree_skb(skb);
return retval;
printk("can't directly forward to input port\n");
return -EINVAL;
}
+ if (p->flags & OFPPFL_NO_FWD && !ignore_no_fwd) {
+ kfree_skb(skb);
+ return 0;
+ }
skb->dev = p->dev;
return xmit_skb(skb);
}
desc->features = 0;
desc->speed = 0;
+ if (p->port_no < 255) {
+ /* FIXME: this is a layering violation and should really be
+ * done in the secchan, as with OFPC_STP in
+ * OFP_SUPPORTED_CAPABILITIES. */
+ desc->features |= OFPPF_STP;
+ }
+
spin_lock_irqsave(&p->lock, flags);
- if (p->flags & BRPF_NO_FLOOD)
- desc->flags |= htonl(OFPPFL_NO_FLOOD);
- else if (p->status & BRPS_PORT_DOWN)
- desc->flags |= htonl(OFPPFL_PORT_DOWN);
- else if (p->status & BRPS_LINK_DOWN)
- desc->flags |= htonl(OFPPFL_LINK_DOWN);
+ desc->flags = htonl(p->flags | p->status);
spin_unlock_irqrestore(&p->lock, flags);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,24)
if (ecmd.supported & SUPPORTED_10000baseT_Full)
desc->features |= OFPPF_10GB_FD;
- desc->features = htonl(desc->features);
desc->speed = htonl(ecmd.speed);
}
}
#endif
+ desc->features = htonl(desc->features);
}
static int
if (net_ratelimit())
printk("problem bringing up port %s\n", p->dev->name);
rtnl_unlock();
- p->status |= BRPS_PORT_DOWN;
+ p->status |= OFPPFL_PORT_DOWN;
}
/* Callback function for a workqueue to enable an interface */
if (net_ratelimit())
printk("problem bringing down port %s\n", p->dev->name);
rtnl_unlock();
- p->status &= ~BRPS_PORT_DOWN;
+ p->status &= ~OFPPFL_PORT_DOWN;
}
int
struct net_bridge_port *p = (port_no < OFPP_MAX ? dp->ports[port_no]
: port_no == OFPP_LOCAL ? dp->local_port
: NULL);
+ uint32_t flag_mask;
+
/* Make sure the port id hasn't changed since this was sent */
if (!p || memcmp(opp->hw_addr, p->dev->dev_addr, ETH_ALEN))
return -1;
spin_lock_irqsave(&p->lock, flags);
- if (opm->mask & htonl(OFPPFL_NO_FLOOD)) {
- if (opp->flags & htonl(OFPPFL_NO_FLOOD))
- p->flags |= BRPF_NO_FLOOD;
- else
- p->flags &= ~BRPF_NO_FLOOD;
+ flag_mask = ntohl(opm->mask) & PORT_FLAG_BITS;
+ if (flag_mask) {
+ p->flags &= ~flag_mask;
+ p->flags |= ntohl(opp->flags) & flag_mask;
}
/* Modifying the status of an interface requires taking a lock
* context. */
if (opm->mask & htonl(OFPPFL_PORT_DOWN)) {
if ((opp->flags & htonl(OFPPFL_PORT_DOWN))
- && (p->status & BRPS_PORT_DOWN) == 0) {
+ && (p->status & OFPPFL_PORT_DOWN) == 0) {
PREPARE_WORK(&p->port_task, down_port_cb);
schedule_work(&p->port_task);
} else if ((opp->flags & htonl(OFPPFL_PORT_DOWN)) == 0
- && (p->status & BRPS_PORT_DOWN)) {
+ && (p->status & OFPPFL_PORT_DOWN)) {
PREPARE_WORK(&p->port_task, up_port_cb);
schedule_work(&p->port_task);
}
orig_status = p->status;
if (p->dev->flags & IFF_UP)
- p->status &= ~BRPS_PORT_DOWN;
+ p->status &= ~OFPPFL_PORT_DOWN;
else
- p->status |= BRPS_PORT_DOWN;
+ p->status |= OFPPFL_PORT_DOWN;
if (netif_carrier_ok(p->dev))
- p->status &= ~BRPS_LINK_DOWN;
+ p->status &= ~OFPPFL_LINK_DOWN;
else
- p->status |= BRPS_LINK_DOWN;
+ p->status |= OFPPFL_LINK_DOWN;
spin_unlock_irqrestore(&p->lock, flags);
return (orig_status != p->status);
#include <linux/mutex.h>
#include <linux/netlink.h>
#include <linux/netdevice.h>
+#include <linux/workqueue.h>
#include <linux/skbuff.h>
#include "openflow.h"
#include "flow.h"
#define OFP_SUPPORTED_CAPABILITIES ( OFPC_FLOW_STATS \
| OFPC_TABLE_STATS \
| OFPC_PORT_STATS \
+ | OFPC_STP \
| OFPC_MULTI_PHY_TX )
/* Actions supported by this implementation. */
uint32_t seq; /* Netlink sequence ID of request. */
};
+#define PORT_STATUS_BITS (OFPPFL_PORT_DOWN | OFPPFL_LINK_DOWN)
+#define PORT_FLAG_BITS (~PORT_STATUS_BITS)
+
+struct net_bridge_port {
+ u16 port_no;
+ u32 flags; /* Some subset of PORT_FLAG_BITS. */
+ u32 status; /* Some subset of PORT_STATUS_BITS. */
+ spinlock_t lock;
+ struct work_struct port_task;
+ struct datapath *dp;
+ struct net_device *dev;
+ struct list_head node; /* Element in datapath.ports. */
+};
+
extern struct mutex dp_mutex;
-int dp_output_port(struct datapath *, struct sk_buff *, int out_port);
+int dp_output_port(struct datapath *, struct sk_buff *, int out_port,
+ int ignore_no_fwd);
int dp_output_control(struct datapath *, struct sk_buff *, uint32_t,
size_t, int);
int dp_set_origin(struct datapath *, uint16_t, struct sk_buff *);
while ((skb = skb_dequeue(&dp_dev->xmit_queue)) != NULL) {
skb_reset_mac_header(skb);
rcu_read_lock();
- fwd_port_input(dp->chain, skb, OFPP_LOCAL);
+ fwd_port_input(dp->chain, skb, dp->local_port);
rcu_read_unlock();
}
netif_wake_queue(dp->netdev);
* Stanford Junior University
*/
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/in.h>
static struct sk_buff *retrieve_skb(uint32_t id);
static void discard_skb(uint32_t id);
-/* 'skb' was received on 'in_port', a physical switch port between 0 and
- * OFPP_MAX. Process it according to 'chain'. Returns 0 if successful, in
- * which case 'skb' is destroyed, or -ESRCH if there is no matching flow, in
- * which case 'skb' still belongs to the caller. */
+/* 'skb' was received on port 'p', which may be a physical switch port, the
+ * local port, or a null pointer. Process it according to 'chain'. Returns 0
+ * if successful, in which case 'skb' is destroyed, or -ESRCH if there is no
+ * matching flow, in which case 'skb' still belongs to the caller. */
int run_flow_through_tables(struct sw_chain *chain, struct sk_buff *skb,
- int in_port)
+ struct net_bridge_port *p)
{
+ /* Ethernet address used as the destination for STP frames. */
+ static const uint8_t stp_eth_addr[ETH_ALEN]
+ = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01 };
struct sw_flow_key key;
struct sw_flow *flow;
- if (flow_extract(skb, in_port, &key)
+ if (flow_extract(skb, p ? p->port_no : OFPP_NONE, &key)
&& (chain->dp->flags & OFPC_FRAG_MASK) == OFPC_FRAG_DROP) {
/* Drop fragment. */
kfree_skb(skb);
return 0;
}
+ if (p && p->flags & (OFPPFL_NO_RECV | OFPPFL_NO_RECV_STP) &&
+ p->flags & (compare_ether_addr(key.dl_dst, stp_eth_addr)
+ ? OFPPFL_NO_RECV : OFPPFL_NO_RECV_STP)) {
+ kfree_skb(skb);
+ return 0;
+ }
flow = chain_lookup(chain, &key);
if (likely(flow != NULL)) {
flow_used(flow, skb);
execute_actions(chain->dp, skb, &key,
- flow->actions, flow->n_actions);
+ flow->actions, flow->n_actions, 0);
return 0;
} else {
return -ESRCH;
}
}
-/* 'skb' was received on 'in_port', a physical switch port between 0 and
- * OFPP_MAX. Process it according to 'chain', sending it up to the controller
- * if no flow matches. Takes ownership of 'skb'. */
-void fwd_port_input(struct sw_chain *chain, struct sk_buff *skb, int in_port)
+/* 'skb' was received on port 'p', which may be a physical switch port, the
+ * local port, or a null pointer. Process it according to 'chain', sending it
+ * up to the controller if no flow matches. Takes ownership of 'skb'. */
+void fwd_port_input(struct sw_chain *chain, struct sk_buff *skb,
+ struct net_bridge_port *p)
{
- if (run_flow_through_tables(chain, skb, in_port))
+ if (run_flow_through_tables(chain, skb, p))
dp_output_control(chain->dp, skb, fwd_save_skb(skb),
chain->dp->miss_send_len,
OFPR_NO_MATCH);
}
static int do_output(struct datapath *dp, struct sk_buff *skb, size_t max_len,
- int out_port)
+ int out_port, int ignore_no_fwd)
{
if (!skb)
return -ENOMEM;
return (likely(out_port != OFPP_CONTROLLER)
- ? dp_output_port(dp, skb, out_port)
+ ? dp_output_port(dp, skb, out_port, ignore_no_fwd)
: dp_output_control(dp, skb, fwd_save_skb(skb),
max_len, OFPR_ACTION));
}
void execute_actions(struct datapath *dp, struct sk_buff *skb,
- const struct sw_flow_key *key,
- const struct ofp_action *actions, int n_actions)
+ const struct sw_flow_key *key,
+ const struct ofp_action *actions, int n_actions,
+ int ignore_no_fwd)
{
/* Every output action needs a separate clone of 'skb', but the common
* case is just a single output action, so that doing a clone and
if (prev_port != -1) {
do_output(dp, skb_clone(skb, GFP_ATOMIC),
- max_len, prev_port);
+ max_len, prev_port, ignore_no_fwd);
prev_port = -1;
}
}
}
if (prev_port != -1)
- do_output(dp, skb, max_len, prev_port);
+ do_output(dp, skb, max_len, prev_port, ignore_no_fwd);
else
kfree_skb(skb);
}
dp_set_origin(chain->dp, ntohs(opo->in_port), skb);
flow_extract(skb, ntohs(opo->in_port), &key);
- execute_actions(chain->dp, skb, &key, opo->actions, n_actions);
+ execute_actions(chain->dp, skb, &key, opo->actions, n_actions, 1);
return 0;
}
struct sw_flow_key key;
flow_used(flow, skb);
flow_extract(skb, ntohs(ofm->match.in_port), &key);
- execute_actions(chain->dp, skb, &key, ofm->actions, n_actions);
+ execute_actions(chain->dp, skb, &key, ofm->actions, n_actions, 0);
}
else
error = -ESRCH;
#define PKT_COOKIE_BITS (32 - PKT_BUFFER_BITS)
-void fwd_port_input(struct sw_chain *, struct sk_buff *, int in_port);
-int run_flow_through_tables(struct sw_chain *, struct sk_buff *, int in_port);
+void fwd_port_input(struct sw_chain *, struct sk_buff *,
+ struct net_bridge_port *);
+int run_flow_through_tables(struct sw_chain *, struct sk_buff *,
+ struct net_bridge_port *);
int fwd_control_input(struct sw_chain *, const struct sender *,
const void *, size_t);
void fwd_exit(void);
void execute_actions(struct datapath *, struct sk_buff *,
- const struct sw_flow_key *,
- const struct ofp_action *, int n_actions);
+ const struct sw_flow_key *,
+ const struct ofp_action *, int n_actions,
+ int ignore_no_fwd);
struct sk_buff *execute_setter(struct sk_buff *, uint16_t,
const struct sw_flow_key *, const struct ofp_action *);
socket-util.h \
type-props.h \
timeval.h \
+ stp.h \
util.h \
vconn.h \
vconn-ssl.h \
OFPC_IP_REASM = 1 << 5 /* Can reassemble IP fragments. */
};
-/* Flags to indicate behavior of the physical port */
+/* Flags to indicate behavior of the physical port. */
enum ofp_port_flags {
- OFPPFL_NO_FLOOD = 1 << 0, /* Do not include this port when flooding. */
- OFPPFL_PORT_DOWN = 1 << 1, /* Port is configured down. */
- OFPPFL_LINK_DOWN = 1 << 2, /* No physical link on interface.
- NOTE: Non-settable field */
+ /* Read/write bits. */
+ OFPPFL_PORT_DOWN = 1 << 1, /* Port is configured down. */
+ OFPPFL_NO_STP = 1 << 3, /* Disable 802.1D spanning tree on port. */
+ OFPPFL_NO_RECV = 1 << 4, /* Drop most packets received on port. */
+ OFPPFL_NO_RECV_STP = 1 << 5, /* Drop received 802.1D STP packets. */
+ OFPPFL_NO_FWD = 1 << 6, /* Drop packets forwarded to port. */
+ OFPPFL_NO_PACKET_IN = 1 << 7, /* Do not send packet-in msgs for port. */
+
+ /* Read-only bits. */
+ OFPPFL_LINK_DOWN = 1 << 2, /* No physical link present. */
+
+ /* Read-only when STP is enabled (when OFPPFL_NO_STP is not set).
+ * Read/write when STP is disabled (when OFPPFL_NO_STP is set).
+ *
+ * The OFPPFL_STP_* bits have no effect on switch operation. The
+ * controller must adjust OFPPFL_NO_RECV, OFPPFL_NO_FWD, and
+ * OFPPFL_NO_PACKET_IN appropriately to fully implement an 802.1D spanning
+ * tree. */
+ OFPPFL_NO_FLOOD = 1 << 0, /* Do not include this port when flooding. */
+ OFPPFL_STP_LISTEN = 0 << 8, /* Not learning or relaying frames. */
+ OFPPFL_STP_LEARN = 1 << 8, /* Learning but not relaying frames. */
+ OFPPFL_STP_FORWARD = 2 << 8, /* Learning and relaying frames. */
+ OFPPFL_STP_BLOCK = 3 << 8, /* Not part of spanning tree. */
+ OFPPFL_STP_MASK = 3 << 8, /* Bit mask for OFPPFL_STP_* values. */
};
/* Features of physical ports available in a datapath. */
OFPPF_1GB_HD = 1 << 4, /* 1 Gb half-duplex rate support. */
OFPPF_1GB_FD = 1 << 5, /* 1 Gb full-duplex rate support. */
OFPPF_10GB_FD = 1 << 6, /* 10 Gb full-duplex rate support. */
+ OFPPF_STP = 1 << 7, /* 802.1D spanning tree supported on port. */
};
--- /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 STP_H
+#define STP_H 1
+
+/* This is an implementation of Spanning Tree Protocol as described in IEEE
+ * 802.1D-1998, clauses 8 and 9. Section numbers refer to this standard. */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "compiler.h"
+#include "util.h"
+
+/* Ethernet address used as the destination for STP frames. */
+extern const uint8_t stp_eth_addr[6];
+
+/* LLC field values used for STP frames. */
+#define STP_LLC_SSAP 0x42
+#define STP_LLC_DSAP 0x42
+#define STP_LLC_CNTL 0x03
+
+/* Bridge identifier. Top 16 bits are a priority value (numerically lower
+ * values are higher priorities). Bottom 48 bits are MAC address of bridge. */
+typedef uint64_t stp_identifier;
+
+/* Basic STP functionality. */
+#define STP_MAX_PORTS 255
+struct stp *stp_create(const char *name, stp_identifier bridge_id,
+ void (*send_bpdu)(const void *bpdu, size_t bpdu_size,
+ int port_no, void *aux),
+ void *aux);
+void stp_destroy(struct stp *);
+void stp_tick(struct stp *, int elapsed);
+void stp_set_bridge_priority(struct stp *, uint16_t new_priority);
+
+/* STP properties. */
+const char *stp_get_name(const struct stp *);
+stp_identifier stp_get_bridge_id(const struct stp *);
+stp_identifier stp_get_designated_root(const struct stp *);
+bool stp_is_root_bridge(const struct stp *);
+int stp_get_root_path_cost(const struct stp *);
+
+/* Obtaining STP ports. */
+struct stp_port *stp_get_port(struct stp *, int port_no);
+struct stp_port *stp_get_root_port(struct stp *);
+bool stp_get_changed_port(struct stp *, struct stp_port **portp);
+
+/* State of an STP port.
+ *
+ * A port is in exactly one state at any given time, but distinct bits are used
+ * for states to allow testing for more than one state with a bit mask. */
+enum stp_state {
+ STP_DISABLED = 1 << 0, /* 8.4.5: Disabled by management. */
+ STP_LISTENING = 1 << 1, /* 8.4.2: Not learning or relaying frames. */
+ STP_LEARNING = 1 << 2, /* 8.4.3: Learning but not relaying frames. */
+ STP_FORWARDING = 1 << 3, /* 8.4.4: Learning and relaying frames. */
+ STP_BLOCKING = 1 << 4 /* 8.4.1: Initial boot state. */
+};
+const char *stp_state_name(enum stp_state);
+bool stp_forward_in_state(enum stp_state);
+bool stp_learn_in_state(enum stp_state);
+
+void stp_received_bpdu(struct stp_port *, const void *bpdu, size_t bpdu_size);
+
+struct stp *stp_port_get_stp(struct stp_port *);
+int stp_port_no(const struct stp_port *);
+enum stp_state stp_port_get_state(const struct stp_port *);
+void stp_port_enable(struct stp_port *);
+void stp_port_disable(struct stp_port *);
+void stp_port_set_priority(struct stp_port *, uint8_t new_priority);
+void stp_port_set_path_cost(struct stp_port *, unsigned int path_cost);
+void stp_port_set_speed(struct stp_port *, unsigned int speed);
+void stp_port_enable_change_detection(struct stp_port *);
+void stp_port_disable_change_detection(struct stp_port *);
+
+#endif /* stp.h */
VLOG_MODULE(poll_loop)
VLOG_MODULE(secchan)
VLOG_MODULE(rconn)
+VLOG_MODULE(stp)
VLOG_MODULE(switch)
VLOG_MODULE(terminal)
VLOG_MODULE(socket_util)
rconn.c \
socket-util.c \
timeval.c \
+ stp.c \
util.c \
vconn-tcp.c \
vconn-unix.c \
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 buffer *);
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.
*
[0 ... UINT8_MAX] = sizeof (struct ofp_header),
[OFPT_FEATURES_REPLY] = sizeof (struct ofp_switch_features),
[OFPT_PACKET_IN] = offsetof (struct ofp_packet_in, data),
+ [OFPT_PORT_STATUS] = sizeof(struct ofp_port_status),
};
struct ofp_header *oh;
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);
}
}
+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 && opp->features & ntohl(OFPPF_STP)) {
+ uint32_t flags = ntohl(opp->flags);
+ uint32_t new_flags = flags & ~(OFPPFL_NO_RECV | OFPPFL_NO_RECV_STP
+ | OFPPFL_NO_FWD | OFPPFL_NO_PACKET_IN);
+ if (!(flags & (OFPPFL_NO_STP | OFPPFL_PORT_DOWN | OFPPFL_LINK_DOWN))) {
+ bool forward = false;
+ bool learn = false;
+ switch (flags & OFPPFL_STP_MASK) {
+ case OFPPFL_STP_LISTEN:
+ case OFPPFL_STP_BLOCK:
+ break;
+ case OFPPFL_STP_LEARN:
+ learn = true;
+ break;
+ case OFPPFL_STP_FORWARD:
+ forward = learn = true;
+ break;
+ }
+ if (!forward) {
+ new_flags |= OFPPFL_NO_RECV | OFPPFL_NO_FWD;
+ }
+ if (!learn) {
+ new_flags |= OFPPFL_NO_PACKET_IN;
+ }
+ }
+ if (flags != new_flags) {
+ struct ofp_port_mod *opm;
+ struct buffer *b;
+ int retval;
+
+ VLOG_WARN("port %d: flags=%x new_flags=%x",
+ ntohs(opp->port_no), flags, new_flags);
+ opm = make_openflow(sizeof *opm, OFPT_PORT_MOD, &b);
+ opm->mask = htonl(flags ^ new_flags);
+ opm->desc = *opp;
+ opm->desc.flags = htonl(new_flags);
+ retval = rconn_send(rconn, b, NULL);
+ if (retval) {
+ if (retval != ENOTCONN) {
+ VLOG_WARN_RL(&rl, "%s: send: %s",
+ rconn_get_name(rconn), strerror(retval));
+ }
+ buffer_delete(b);
+ }
+ }
+ }
+}
--- /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.
+ */
+
+/* Based on sample implementation in 802.1D-1998. Above copyright and license
+ * applies to all modifications. */
+
+#include "stp.h"
+#include <arpa/inet.h>
+#include <assert.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include "packets.h"
+#include "util.h"
+#include "xtoxll.h"
+
+#include "vlog.h"
+#define THIS_MODULE VLM_stp
+
+/* Ethernet address used as the destination for STP frames. */
+const uint8_t stp_eth_addr[ETH_ADDR_LEN]
+= { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01 };
+
+#define STP_PROTOCOL_ID 0x0000
+#define STP_PROTOCOL_VERSION 0x00
+#define STP_TYPE_CONFIG 0x00
+#define STP_TYPE_TCN 0x80
+
+struct stp_bpdu_header {
+ uint16_t protocol_id; /* STP_PROTOCOL_ID. */
+ uint8_t protocol_version; /* STP_PROTOCOL_VERSION. */
+ uint8_t bpdu_type; /* One of STP_TYPE_*. */
+} __attribute__((packed));
+BUILD_ASSERT_DECL(sizeof(struct stp_bpdu_header) == 4);
+
+enum stp_config_bpdu_flags {
+ STP_CONFIG_TOPOLOGY_CHANGE_ACK = 0x80,
+ STP_CONFIG_TOPOLOGY_CHANGE = 0x01
+};
+
+struct stp_config_bpdu {
+ struct stp_bpdu_header header; /* Type STP_TYPE_CONFIG. */
+ uint8_t flags; /* STP_CONFIG_* flags. */
+ uint64_t root_id; /* 8.5.1.1: Bridge believed to be root. */
+ uint32_t root_path_cost; /* 8.5.1.2: Cost of path to root. */
+ uint64_t bridge_id; /* 8.5.1.3: ID of transmitting bridge. */
+ uint16_t port_id; /* 8.5.1.4: Port transmitting the BPDU. */
+ uint16_t message_age; /* 8.5.1.5: Age of BPDU at tx time. */
+ uint16_t max_age; /* 8.5.1.6: Timeout for received data. */
+ uint16_t hello_time; /* 8.5.1.7: Time between BPDU generation. */
+ uint16_t forward_delay; /* 8.5.1.8: State progression delay. */
+} __attribute__((packed));
+BUILD_ASSERT_DECL(sizeof(struct stp_config_bpdu) == 35);
+
+struct stp_tcn_bpdu {
+ struct stp_bpdu_header header; /* Type STP_TYPE_TCN. */
+} __attribute__((packed));
+BUILD_ASSERT_DECL(sizeof(struct stp_tcn_bpdu) == 4);
+
+struct stp_timer {
+ bool active; /* Timer in use? */
+ int value; /* Current value of timer, counting up. */
+};
+
+struct stp_port {
+ struct stp *stp;
+ int port_id; /* 8.5.5.1: Unique port identifier. */
+ enum stp_state state; /* 8.5.5.2: Current state. */
+ int path_cost; /* 8.5.5.3: Cost of tx/rx on this port. */
+ stp_identifier designated_root; /* 8.5.5.4. */
+ int designated_cost; /* 8.5.5.5: Path cost to root on port. */
+ stp_identifier designated_bridge; /* 8.5.5.6. */
+ int designated_port; /* 8.5.5.7: Port to send config msgs on. */
+ bool topology_change_ack; /* 8.5.5.8: Flag for next config BPDU. */
+ bool config_pending; /* 8.5.5.9: Send BPDU when hold expires? */
+ bool change_detection_enabled; /* 8.5.5.10: Detect topology changes? */
+
+ struct stp_timer message_age_timer; /* 8.5.6.1: Age of received info. */
+ struct stp_timer forward_delay_timer; /* 8.5.6.2: State change timer. */
+ struct stp_timer hold_timer; /* 8.5.6.3: BPDU rate limit timer. */
+
+ bool state_changed;
+};
+
+struct stp {
+ /* Static bridge data. */
+ char *name; /* Human-readable name for log messages. */
+ stp_identifier bridge_id; /* 8.5.3.7: This bridge. */
+ int max_age; /* 8.5.3.4: Time to drop received data. */
+ int hello_time; /* 8.5.3.5: Time between sending BPDUs. */
+ int forward_delay; /* 8.5.3.6: Delay between state changes. */
+ int bridge_max_age; /* 8.5.3.8: max_age when we're root. */
+ int bridge_hello_time; /* 8.5.3.9: hello_time as root. */
+ int bridge_forward_delay; /* 8.5.3.10: forward_delay as root. */
+
+ /* Dynamic bridge data. */
+ stp_identifier designated_root; /* 8.5.3.1: Bridge believed to be root. */
+ unsigned int root_path_cost; /* 8.5.3.2: Cost of path to root. */
+ struct stp_port *root_port; /* 8.5.3.3: Lowest cost port to root. */
+ bool topology_change_detected; /* 8.5.3.11: Detected a topology change? */
+ bool topology_change; /* 8.5.3.12: Received topology change? */
+
+ /* Bridge timers. */
+ struct stp_timer hello_timer; /* 8.5.4.1: Hello timer. */
+ struct stp_timer tcn_timer; /* 8.5.4.2: Topology change timer. */
+ struct stp_timer topology_change_timer; /* 8.5.4.3. */
+
+ /* Ports. */
+ struct stp_port ports[STP_MAX_PORTS];
+
+ /* Interface to client. */
+ struct stp_port *first_changed_port;
+ void (*send_bpdu)(const void *bpdu, size_t bpdu_size,
+ int port_no, void *aux);
+ void *aux;
+};
+
+#define FOR_EACH_ENABLED_PORT(PORT, STP) \
+ for ((PORT) = stp_next_enabled_port((STP), (STP)->ports); \
+ (PORT); \
+ (PORT) = stp_next_enabled_port((STP), (PORT) + 1))
+static struct stp_port *
+stp_next_enabled_port(const struct stp *stp, const struct stp_port *port)
+{
+ for (; port < &stp->ports[ARRAY_SIZE(stp->ports)]; port++) {
+ if (port->state != STP_DISABLED) {
+ return (struct stp_port *) port;
+ }
+ }
+ return NULL;
+}
+
+#define SECONDS_TO_TIMER(SECS) ((SECS) * 0x100)
+
+#define MESSAGE_AGE_INCREMENT 1
+
+static void stp_transmit_config(struct stp_port *);
+static bool stp_supersedes_port_info(const struct stp_port *,
+ const struct stp_config_bpdu *);
+static void stp_record_config_information(struct stp_port *,
+ const struct stp_config_bpdu *);
+static void stp_record_config_timeout_values(struct stp *,
+ const struct stp_config_bpdu *);
+static bool stp_is_designated_port(const struct stp_port *);
+static void stp_config_bpdu_generation(struct stp *);
+static void stp_transmit_tcn(struct stp *);
+static void stp_configuration_update(struct stp *);
+static bool stp_supersedes_root(const struct stp_port *root,
+ const struct stp_port *);
+static void stp_root_selection(struct stp *);
+static void stp_designated_port_selection(struct stp *);
+static void stp_become_designated_port(struct stp_port *);
+static void stp_port_state_selection(struct stp *);
+static void stp_make_forwarding(struct stp_port *);
+static void stp_make_blocking(struct stp_port *);
+static void stp_set_port_state(struct stp_port *, enum stp_state);
+static void stp_topology_change_detection(struct stp *);
+static void stp_topology_change_acknowledged(struct stp *);
+static void stp_acknowledge_topology_change(struct stp_port *);
+static void stp_received_config_bpdu(struct stp *, struct stp_port *,
+ const struct stp_config_bpdu *);
+static void stp_received_tcn_bpdu(struct stp *, struct stp_port *,
+ const struct stp_tcn_bpdu *);
+static void stp_hello_timer_expiry(struct stp *);
+static void stp_message_age_timer_expiry(struct stp_port *);
+static bool stp_is_designated_for_some_port(const struct stp *);
+static void stp_forward_delay_timer_expiry(struct stp_port *);
+static void stp_tcn_timer_expiry(struct stp *);
+static void stp_topology_change_timer_expiry(struct stp *);
+static void stp_hold_timer_expiry(struct stp_port *);
+static void stp_initialize_port(struct stp_port *, enum stp_state);
+static void stp_become_root_bridge(struct stp *stp);
+
+static void stp_start_timer(struct stp_timer *, int value);
+static void stp_stop_timer(struct stp_timer *);
+static bool stp_timer_expired(struct stp_timer *, int elapsed, int timeout);
+
+/* Creates and returns a new STP instance that initially has no port enabled.
+ *
+ * 'bridge_id' should be a 48-bit MAC address as returned by
+ * eth_addr_to_uint64(). 'bridge_id' may also have a priority value in its top
+ * 16 bits; if those bits are set to 0, the default bridge priority of 32768 is
+ * used. (This priority may be changed with stp_set_bridge_priority().)
+ *
+ * When the bridge needs to send out a BPDU, it calls 'send_bpdu', passing
+ * 'aux' as auxiliary data. This callback may be called from stp_tick() or
+ * stp_received_bpdu().
+ */
+struct stp *
+stp_create(const char *name, stp_identifier bridge_id,
+ void (*send_bpdu)(const void *bpdu, size_t bpdu_size,
+ int port_no, void *aux),
+ void *aux)
+{
+ struct stp *stp;
+ struct stp_port *p;
+
+ stp = xcalloc(1, sizeof *stp);
+ stp->name = xstrdup(name);
+ stp->bridge_id = bridge_id;
+ if (!(stp->bridge_id >> 48)) {
+ stp->bridge_id |= UINT64_C(32768) << 48;
+ }
+ stp->max_age = SECONDS_TO_TIMER(20);
+ stp->hello_time = SECONDS_TO_TIMER(2);
+ stp->forward_delay = SECONDS_TO_TIMER(15);
+ stp->bridge_max_age = stp->max_age;
+ stp->bridge_hello_time = stp->hello_time;
+ stp->bridge_forward_delay = stp->forward_delay;
+
+ stp->designated_root = stp->bridge_id;
+ stp->root_path_cost = 0;
+ stp->root_port = NULL;
+ stp->topology_change_detected = false;
+ stp->topology_change = false;
+
+ stp_stop_timer(&stp->tcn_timer);
+ stp_stop_timer(&stp->topology_change_timer);
+ stp_start_timer(&stp->hello_timer, 0);
+
+ stp->send_bpdu = send_bpdu;
+ stp->aux = aux;
+
+ stp->first_changed_port = &stp->ports[ARRAY_SIZE(stp->ports)];
+ for (p = stp->ports; p < &stp->ports[ARRAY_SIZE(stp->ports)]; p++) {
+ p->stp = stp;
+ p->port_id = (stp_port_no(p) + 1) | (128 << 8);
+ p->path_cost = 19; /* Recommended default for 100 Mb/s link. */
+ stp_initialize_port(p, STP_DISABLED);
+ }
+ return stp;
+}
+
+/* Destroys 'stp'. */
+void
+stp_destroy(struct stp *stp)
+{
+ free(stp);
+}
+
+void
+stp_tick(struct stp *stp, int elapsed)
+{
+ struct stp_port *p;
+
+ if (stp_timer_expired(&stp->hello_timer, elapsed, stp->hello_time)) {
+ stp_hello_timer_expiry(stp);
+ }
+ if (stp_timer_expired(&stp->tcn_timer, elapsed, stp->bridge_hello_time)) {
+ stp_tcn_timer_expiry(stp);
+ }
+ if (stp_timer_expired(&stp->topology_change_timer, elapsed,
+ stp->max_age + stp->forward_delay)) {
+ stp_topology_change_timer_expiry(stp);
+ }
+ FOR_EACH_ENABLED_PORT (p, stp) {
+ if (stp_timer_expired(&p->message_age_timer, elapsed, stp->max_age)) {
+ stp_message_age_timer_expiry(p);
+ }
+ }
+ FOR_EACH_ENABLED_PORT (p, stp) {
+ if (stp_timer_expired(&p->forward_delay_timer, elapsed,
+ stp->forward_delay)) {
+ stp_forward_delay_timer_expiry(p);
+ }
+ if (stp_timer_expired(&p->hold_timer, elapsed, SECONDS_TO_TIMER(1))) {
+ stp_hold_timer_expiry(p);
+ }
+ }
+}
+
+void
+stp_set_bridge_priority(struct stp *stp, uint16_t new_priority)
+{
+ stp_identifier new_bridge_id;
+ bool root;
+ struct stp_port *p;
+
+ new_bridge_id = ((stp->bridge_id & UINT64_C(0xffffffffffff))
+ | ((uint64_t) new_priority << 48));
+ root = stp_is_root_bridge(stp);
+ FOR_EACH_ENABLED_PORT (p, stp) {
+ if (stp_is_designated_port(p)) {
+ p->designated_bridge = new_bridge_id;
+ }
+ }
+ stp->bridge_id = new_bridge_id;
+ stp_configuration_update(stp);
+ stp_port_state_selection(stp);
+ if (stp_is_root_bridge(stp) && !root) {
+ stp_become_root_bridge(stp);
+ }
+}
+
+/* Returns the name given to 'stp' in the call to stp_create(). */
+const char *
+stp_get_name(const struct stp *stp)
+{
+ return stp->name;
+}
+
+/* Returns the bridge ID for 'stp'. */
+stp_identifier
+stp_get_bridge_id(const struct stp *stp)
+{
+ return stp->bridge_id;
+}
+
+/* Returns the bridge ID of the bridge currently believed to be the root. */
+stp_identifier
+stp_get_designated_root(const struct stp *stp)
+{
+ return stp->designated_root;
+}
+
+/* Returns true if 'stp' believes itself to the be root of the spanning tree,
+ * false otherwise. */
+bool
+stp_is_root_bridge(const struct stp *stp)
+{
+ return stp->bridge_id == stp->designated_root;
+}
+
+/* Returns the cost of the path from 'stp' to the root of the spanning tree. */
+int
+stp_get_root_path_cost(const struct stp *stp)
+{
+ return stp->root_path_cost;
+}
+
+/* Returns the port in 'stp' with index 'port_no', which must be between 0 and
+ * STP_MAX_PORTS. */
+struct stp_port *
+stp_get_port(struct stp *stp, int port_no)
+{
+ assert(port_no >= 0 && port_no < ARRAY_SIZE(stp->ports));
+ return &stp->ports[port_no];
+}
+
+/* Returns the port connecting 'stp' to the root bridge, or a null pointer if
+ * there is no such port. */
+struct stp_port *
+stp_get_root_port(struct stp *stp)
+{
+ return stp->root_port;
+}
+
+/* Finds a port whose state has changed. If successful, stores the port whose
+ * state changed in '*portp' and returns true. If no port has changed, stores
+ * NULL in '*portp' and returns false. */
+bool
+stp_get_changed_port(struct stp *stp, struct stp_port **portp)
+{
+ struct stp_port *end = &stp->ports[ARRAY_SIZE(stp->ports)];
+ struct stp_port *p;
+
+ for (p = stp->first_changed_port; p < end; p++) {
+ if (p->state_changed) {
+ p->state_changed = false;
+ stp->first_changed_port = p + 1;
+ *portp = p;
+ return true;
+ }
+ }
+ stp->first_changed_port = end;
+ *portp = NULL;
+ return false;
+}
+
+/* Returns the name for the given 'state' (for use in debugging and log
+ * messages). */
+const char *
+stp_state_name(enum stp_state state)
+{
+ switch (state) {
+ case STP_DISABLED:
+ return "disabled";
+ case STP_LISTENING:
+ return "listening";
+ case STP_LEARNING:
+ return "learning";
+ case STP_FORWARDING:
+ return "forwarding";
+ case STP_BLOCKING:
+ return "blocking";
+ default:
+ NOT_REACHED();
+ }
+}
+
+/* Returns true if 'state' is one in which packets received on a port should
+ * be forwarded, false otherwise. */
+bool
+stp_forward_in_state(enum stp_state state)
+{
+ return state == STP_FORWARDING;
+}
+
+/* Returns true if 'state' is one in which MAC learning should be done on
+ * packets received on a port, false otherwise. */
+bool
+stp_learn_in_state(enum stp_state state)
+{
+ return state & (STP_LEARNING | STP_FORWARDING);
+}
+
+/* Notifies the STP entity that bridge protocol data unit 'bpdu', which is
+ * 'bpdu_size' bytes in length, was received on port 'p'.
+ *
+ * This function may call the 'send_bpdu' function provided to stp_create(). */
+void
+stp_received_bpdu(struct stp_port *p, const void *bpdu, size_t bpdu_size)
+{
+ struct stp *stp = p->stp;
+ const struct stp_bpdu_header *header;
+
+ if (p->state == STP_DISABLED) {
+ return;
+ }
+
+ if (bpdu_size < sizeof(struct stp_bpdu_header)) {
+ VLOG_WARN("%s: received runt %zu-byte BPDU", stp->name, bpdu_size);
+ return;
+ }
+
+ header = bpdu;
+ if (header->protocol_id != htons(STP_PROTOCOL_ID)) {
+ VLOG_WARN("%s: received BPDU with unexpected protocol ID %"PRIu16,
+ stp->name, ntohs(header->protocol_id));
+ return;
+ }
+ if (header->protocol_version != STP_PROTOCOL_VERSION) {
+ VLOG_DBG("%s: received BPDU with unexpected protocol version %"PRIu8,
+ stp->name, header->protocol_version);
+ }
+
+ switch (header->bpdu_type) {
+ case STP_TYPE_CONFIG:
+ if (bpdu_size < sizeof(struct stp_config_bpdu)) {
+ VLOG_WARN("%s: received config BPDU with invalid size %zu",
+ stp->name, bpdu_size);
+ return;
+ }
+ stp_received_config_bpdu(stp, p, bpdu);
+ break;
+
+ case STP_TYPE_TCN:
+ if (bpdu_size != sizeof(struct stp_tcn_bpdu)) {
+ VLOG_WARN("%s: received TCN BPDU with invalid size %zu",
+ stp->name, bpdu_size);
+ return;
+ }
+ stp_received_tcn_bpdu(stp, p, bpdu);
+ break;
+
+ default:
+ VLOG_WARN("%s: received BPDU of unexpected type %"PRIu8,
+ stp->name, header->bpdu_type);
+ return;
+ }
+}
+
+/* Returns the STP entity in which 'p' is nested. */
+struct stp *
+stp_port_get_stp(struct stp_port *p)
+{
+ return p->stp;
+}
+
+/* Returns the index of port 'p' within its bridge. */
+int
+stp_port_no(const struct stp_port *p)
+{
+ struct stp *stp = p->stp;
+ assert(p >= stp->ports && p < &stp->ports[ARRAY_SIZE(stp->ports)]);
+ return p - stp->ports;
+}
+
+/* Returns the state of port 'p'. */
+enum stp_state
+stp_port_get_state(const struct stp_port *p)
+{
+ return p->state;
+}
+
+/* Disables STP on port 'p'. */
+void
+stp_port_disable(struct stp_port *p)
+{
+ struct stp *stp = p->stp;
+ if (p->state != STP_DISABLED) {
+ bool root = stp_is_root_bridge(stp);
+ stp_become_designated_port(p);
+ stp_set_port_state(p, STP_DISABLED);
+ p->topology_change_ack = false;
+ p->config_pending = false;
+ stp_stop_timer(&p->message_age_timer);
+ stp_stop_timer(&p->forward_delay_timer);
+ stp_configuration_update(stp);
+ stp_port_state_selection(stp);
+ if (stp_is_root_bridge(stp) && !root) {
+ stp_become_root_bridge(stp);
+ }
+ }
+}
+
+/* Enables STP on port 'p'. The port will initially be in "blocking" state. */
+void
+stp_port_enable(struct stp_port *p)
+{
+ if (p->state == STP_DISABLED) {
+ stp_initialize_port(p, STP_BLOCKING);
+ stp_port_state_selection(p->stp);
+ }
+}
+
+/* Sets the priority of port 'p' to 'new_priority'. Lower numerical values
+ * are interpreted as higher priorities. */
+void
+stp_port_set_priority(struct stp_port *p, uint8_t new_priority)
+{
+ uint16_t new_port_id = (p->port_id & 0xff) | (new_priority << 8);
+ if (p->port_id != new_port_id) {
+ struct stp *stp = p->stp;
+ if (stp_is_designated_port(p)) {
+ p->designated_port = new_port_id;
+ }
+ p->port_id = new_port_id;
+ if (stp->bridge_id == p->designated_bridge
+ && p->port_id < p->designated_port) {
+ stp_become_designated_port(p);
+ stp_port_state_selection(stp);
+ }
+ }
+}
+
+/* Sets the path cost of port 'p' to 'path_cost'. Lower values are generally
+ * used to indicate faster links. Use stp_port_set_speed() to automatically
+ * generate a default path cost from a link speed. */
+void
+stp_port_set_path_cost(struct stp_port *p, unsigned int path_cost)
+{
+ if (p->path_cost != path_cost) {
+ struct stp *stp = p->stp;
+ p->path_cost = path_cost;
+ stp_configuration_update(stp);
+ stp_port_state_selection(stp);
+ }
+}
+
+/* Sets the path cost of port 'p' based on 'speed' (measured in Mb/s). */
+void
+stp_port_set_speed(struct stp_port *p, unsigned int speed)
+{
+ stp_port_set_path_cost(p, (speed >= 10000 ? 2 /* 10 Gb/s. */
+ : speed >= 1000 ? 4 /* 1 Gb/s. */
+ : speed >= 100 ? 19 /* 100 Mb/s. */
+ : speed >= 16 ? 62 /* 16 Mb/s. */
+ : speed >= 10 ? 100 /* 10 Mb/s. */
+ : speed >= 4 ? 250 /* 4 Mb/s. */
+ : 19)); /* 100 Mb/s (guess). */
+}
+
+/* Enables topology change detection on port 'p'. */
+void
+stp_port_enable_change_detection(struct stp_port *p)
+{
+ p->change_detection_enabled = true;
+}
+
+/* Disables topology change detection on port 'p'. */
+void
+stp_port_disable_change_detection(struct stp_port *p)
+{
+ p->change_detection_enabled = false;
+}
+\f
+static void
+stp_transmit_config(struct stp_port *p)
+{
+ struct stp *stp = p->stp;
+ bool root = stp_is_root_bridge(stp);
+ if (!root && !stp->root_port) {
+ return;
+ }
+ if (p->hold_timer.active) {
+ p->config_pending = true;
+ } else {
+ struct stp_config_bpdu config;
+ memset(&config, 0, sizeof config);
+ config.header.protocol_id = htons(STP_PROTOCOL_ID);
+ config.header.protocol_version = STP_PROTOCOL_VERSION;
+ config.header.bpdu_type = STP_TYPE_CONFIG;
+ config.flags = 0;
+ if (p->topology_change_ack) {
+ config.flags |= htons(STP_CONFIG_TOPOLOGY_CHANGE_ACK);
+ }
+ if (stp->topology_change) {
+ config.flags |= htons(STP_CONFIG_TOPOLOGY_CHANGE);
+ }
+ config.root_id = htonll(stp->designated_root);
+ config.root_path_cost = htonl(stp->root_path_cost);
+ config.bridge_id = htonll(stp->bridge_id);
+ config.port_id = htons(p->port_id);
+ if (root) {
+ config.message_age = htons(0);
+ } else {
+ config.message_age = htons(stp->root_port->message_age_timer.value
+ + MESSAGE_AGE_INCREMENT);
+ }
+ config.max_age = htons(stp->max_age);
+ config.hello_time = htons(stp->hello_time);
+ config.forward_delay = htons(stp->forward_delay);
+ if (ntohs(config.message_age) < stp->max_age) {
+ p->topology_change_ack = false;
+ p->config_pending = false;
+ stp->send_bpdu(&config, sizeof config, stp_port_no(p), stp->aux);
+ stp_start_timer(&p->hold_timer, 0);
+ }
+ }
+}
+
+static bool
+stp_supersedes_port_info(const struct stp_port *p,
+ const struct stp_config_bpdu *config)
+{
+ if (ntohll(config->root_id) != p->designated_root) {
+ return ntohll(config->root_id) < p->designated_root;
+ } else if (ntohl(config->root_path_cost) != p->designated_cost) {
+ return ntohl(config->root_path_cost) < p->designated_cost;
+ } else if (ntohll(config->bridge_id) != p->designated_bridge) {
+ return ntohll(config->bridge_id) < p->designated_bridge;
+ } else {
+ return (ntohll(config->bridge_id) != p->stp->bridge_id
+ || ntohs(config->port_id) <= p->designated_port);
+ }
+}
+
+static void
+stp_record_config_information(struct stp_port *p,
+ const struct stp_config_bpdu *config)
+{
+ p->designated_root = ntohll(config->root_id);
+ p->designated_cost = ntohl(config->root_path_cost);
+ p->designated_bridge = ntohll(config->bridge_id);
+ p->designated_port = ntohs(config->port_id);
+ stp_start_timer(&p->message_age_timer, ntohs(config->message_age));
+}
+
+static void
+stp_record_config_timeout_values(struct stp *stp,
+ const struct stp_config_bpdu *config)
+{
+ stp->max_age = ntohs(config->max_age);
+ stp->hello_time = ntohs(config->hello_time);
+ stp->forward_delay = ntohs(config->forward_delay);
+ stp->topology_change = config->flags & htons(STP_CONFIG_TOPOLOGY_CHANGE);
+}
+
+static bool
+stp_is_designated_port(const struct stp_port *p)
+{
+ return (p->designated_bridge == p->stp->bridge_id
+ && p->designated_port == p->port_id);
+}
+
+static void
+stp_config_bpdu_generation(struct stp *stp)
+{
+ struct stp_port *p;
+
+ FOR_EACH_ENABLED_PORT (p, stp) {
+ if (stp_is_designated_port(p)) {
+ stp_transmit_config(p);
+ }
+ }
+}
+
+static void
+stp_transmit_tcn(struct stp *stp)
+{
+ struct stp_port *p = stp->root_port;
+ struct stp_tcn_bpdu tcn_bpdu;
+ if (!p) {
+ return;
+ }
+ tcn_bpdu.header.protocol_id = htons(STP_PROTOCOL_ID);
+ tcn_bpdu.header.protocol_version = STP_PROTOCOL_VERSION;
+ tcn_bpdu.header.bpdu_type = STP_TYPE_TCN;
+ stp->send_bpdu(&tcn_bpdu, sizeof tcn_bpdu, stp_port_no(p), stp->aux);
+}
+
+static void
+stp_configuration_update(struct stp *stp)
+{
+ stp_root_selection(stp);
+ stp_designated_port_selection(stp);
+}
+
+static bool
+stp_supersedes_root(const struct stp_port *root, const struct stp_port *p)
+{
+ int p_cost = p->designated_cost + p->path_cost;
+ int root_cost = root->designated_cost + root->path_cost;
+
+ if (p->designated_root != root->designated_root) {
+ return p->designated_root < root->designated_root;
+ } else if (p_cost != root_cost) {
+ return p_cost < root_cost;
+ } else if (p->designated_bridge != root->designated_bridge) {
+ return p->designated_bridge < root->designated_bridge;
+ } else if (p->designated_port != root->designated_port) {
+ return p->designated_port < root->designated_port;
+ } else {
+ return p->port_id < root->port_id;
+ }
+}
+
+static void
+stp_root_selection(struct stp *stp)
+{
+ struct stp_port *p, *root;
+
+ root = NULL;
+ FOR_EACH_ENABLED_PORT (p, stp) {
+ if (stp_is_designated_port(p)
+ || p->designated_root >= stp->bridge_id) {
+ continue;
+ }
+ if (root && !stp_supersedes_root(root, p)) {
+ continue;
+ }
+ root = p;
+ }
+ stp->root_port = root;
+ if (!root) {
+ stp->designated_root = stp->bridge_id;
+ stp->root_path_cost = 0;
+ } else {
+ stp->designated_root = root->designated_root;
+ stp->root_path_cost = root->designated_cost + root->path_cost;
+ }
+}
+
+static void
+stp_designated_port_selection(struct stp *stp)
+{
+ struct stp_port *p;
+
+ FOR_EACH_ENABLED_PORT (p, stp) {
+ if (stp_is_designated_port(p)
+ || p->designated_root != stp->designated_root
+ || stp->root_path_cost < p->designated_cost
+ || (stp->root_path_cost == p->designated_cost
+ && (stp->bridge_id < p->designated_bridge
+ || (stp->bridge_id == p->designated_bridge
+ && p->port_id <= p->designated_port))))
+ {
+ stp_become_designated_port(p);
+ }
+ }
+}
+
+static void
+stp_become_designated_port(struct stp_port *p)
+{
+ struct stp *stp = p->stp;
+ p->designated_root = stp->designated_root;
+ p->designated_cost = stp->root_path_cost;
+ p->designated_bridge = stp->bridge_id;
+ p->designated_port = p->port_id;
+}
+
+static void
+stp_port_state_selection(struct stp *stp)
+{
+ struct stp_port *p;
+
+ FOR_EACH_ENABLED_PORT (p, stp) {
+ if (p == stp->root_port) {
+ p->config_pending = false;
+ p->topology_change_ack = false;
+ stp_make_forwarding(p);
+ } else if (stp_is_designated_port(p)) {
+ stp_stop_timer(&p->message_age_timer);
+ stp_make_forwarding(p);
+ } else {
+ p->config_pending = false;
+ p->topology_change_ack = false;
+ stp_make_blocking(p);
+ }
+ }
+}
+
+static void
+stp_make_forwarding(struct stp_port *p)
+{
+ if (p->state == STP_BLOCKING) {
+ stp_set_port_state(p, STP_LISTENING);
+ stp_start_timer(&p->forward_delay_timer, 0);
+ }
+}
+
+static void
+stp_make_blocking(struct stp_port *p)
+{
+ if (!(p->state & (STP_DISABLED | STP_BLOCKING))) {
+ if (p->state & (STP_FORWARDING | STP_LEARNING)) {
+ if (p->change_detection_enabled) {
+ stp_topology_change_detection(p->stp);
+ }
+ }
+ stp_set_port_state(p, STP_BLOCKING);
+ stp_stop_timer(&p->forward_delay_timer);
+ }
+}
+
+static void
+stp_set_port_state(struct stp_port *p, enum stp_state state)
+{
+ if (state != p->state && !p->state_changed) {
+ p->state_changed = true;
+ if (p < p->stp->first_changed_port) {
+ p->stp->first_changed_port = p;
+ }
+ }
+ p->state = state;
+}
+
+static void
+stp_topology_change_detection(struct stp *stp)
+{
+ if (stp_is_root_bridge(stp)) {
+ stp->topology_change = true;
+ stp_start_timer(&stp->topology_change_timer, 0);
+ } else if (!stp->topology_change_detected) {
+ stp_transmit_tcn(stp);
+ stp_start_timer(&stp->tcn_timer, 0);
+ }
+ stp->topology_change_detected = true;
+}
+
+static void
+stp_topology_change_acknowledged(struct stp *stp)
+{
+ stp->topology_change_detected = false;
+ stp_stop_timer(&stp->tcn_timer);
+}
+
+static void
+stp_acknowledge_topology_change(struct stp_port *p)
+{
+ p->topology_change_ack = true;
+ stp_transmit_config(p);
+}
+
+void
+stp_received_config_bpdu(struct stp *stp, struct stp_port *p,
+ const struct stp_config_bpdu *config)
+{
+ if (ntohs(config->message_age) >= ntohs(config->max_age)) {
+ VLOG_WARN("%s: received config BPDU with message age (%u) greater "
+ "than max age (%u)",
+ stp->name,
+ ntohs(config->message_age), ntohs(config->max_age));
+ return;
+ }
+ if (p->state != STP_DISABLED) {
+ bool root = stp_is_root_bridge(stp);
+ if (stp_supersedes_port_info(p, config)) {
+ stp_record_config_information(p, config);
+ stp_configuration_update(stp);
+ stp_port_state_selection(stp);
+ if (!stp_is_root_bridge(stp) && root) {
+ stp_stop_timer(&stp->hello_timer);
+ if (stp->topology_change_detected) {
+ stp_stop_timer(&stp->topology_change_timer);
+ stp_transmit_tcn(stp);
+ stp_start_timer(&stp->tcn_timer, 0);
+ }
+ }
+ if (p == stp->root_port) {
+ stp_record_config_timeout_values(stp, config);
+ stp_config_bpdu_generation(stp);
+ if (config->flags & htons(STP_CONFIG_TOPOLOGY_CHANGE_ACK)) {
+ stp_topology_change_acknowledged(stp);
+ }
+ }
+ } else if (stp_is_designated_port(p)) {
+ stp_transmit_config(p);
+ }
+ }
+}
+
+void
+stp_received_tcn_bpdu(struct stp *stp, struct stp_port *p,
+ const struct stp_tcn_bpdu *tcn)
+{
+ if (p->state != STP_DISABLED) {
+ if (stp_is_designated_port(p)) {
+ stp_topology_change_detection(stp);
+ stp_acknowledge_topology_change(p);
+ }
+ }
+}
+
+static void
+stp_hello_timer_expiry(struct stp *stp)
+{
+ stp_config_bpdu_generation(stp);
+ stp_start_timer(&stp->hello_timer, 0);
+}
+
+static void
+stp_message_age_timer_expiry(struct stp_port *p)
+{
+ struct stp *stp = p->stp;
+ bool root = stp_is_root_bridge(stp);
+ stp_become_designated_port(p);
+ stp_configuration_update(stp);
+ stp_port_state_selection(stp);
+ if (stp_is_root_bridge(stp) && !root) {
+ stp->max_age = stp->bridge_max_age;
+ stp->hello_time = stp->bridge_hello_time;
+ stp->forward_delay = stp->bridge_forward_delay;
+ stp_topology_change_detection(stp);
+ stp_stop_timer(&stp->tcn_timer);
+ stp_config_bpdu_generation(stp);
+ stp_start_timer(&stp->hello_timer, 0);
+ }
+}
+
+static bool
+stp_is_designated_for_some_port(const struct stp *stp)
+{
+ const struct stp_port *p;
+
+ FOR_EACH_ENABLED_PORT (p, stp) {
+ if (p->designated_bridge == stp->bridge_id) {
+ return true;
+ }
+ }
+ return false;
+}
+
+static void
+stp_forward_delay_timer_expiry(struct stp_port *p)
+{
+ if (p->state == STP_LISTENING) {
+ stp_set_port_state(p, STP_LEARNING);
+ stp_start_timer(&p->forward_delay_timer, 0);
+ } else if (p->state == STP_LEARNING) {
+ stp_set_port_state(p, STP_FORWARDING);
+ if (stp_is_designated_for_some_port(p->stp)) {
+ if (p->change_detection_enabled) {
+ stp_topology_change_detection(p->stp);
+ }
+ }
+ }
+}
+
+static void
+stp_tcn_timer_expiry(struct stp *stp)
+{
+ stp_transmit_tcn(stp);
+ stp_start_timer(&stp->tcn_timer, 0);
+}
+
+static void
+stp_topology_change_timer_expiry(struct stp *stp)
+{
+ stp->topology_change_detected = false;
+ stp->topology_change = false;
+}
+
+static void
+stp_hold_timer_expiry(struct stp_port *p)
+{
+ if (p->config_pending) {
+ stp_transmit_config(p);
+ }
+}
+
+static void
+stp_initialize_port(struct stp_port *p, enum stp_state state)
+{
+ assert(state & (STP_DISABLED | STP_BLOCKING));
+ stp_become_designated_port(p);
+ stp_set_port_state(p, state);
+ p->topology_change_ack = false;
+ p->config_pending = false;
+ p->change_detection_enabled = true;
+ stp_stop_timer(&p->message_age_timer);
+ stp_stop_timer(&p->forward_delay_timer);
+ stp_stop_timer(&p->hold_timer);
+}
+
+static void
+stp_become_root_bridge(struct stp *stp)
+{
+ stp->max_age = stp->bridge_max_age;
+ stp->hello_time = stp->bridge_hello_time;
+ stp->forward_delay = stp->bridge_forward_delay;
+ stp_topology_change_detection(stp);
+ stp_stop_timer(&stp->tcn_timer);
+ stp_config_bpdu_generation(stp);
+ stp_start_timer(&stp->hello_timer, 0);
+}
+
+static void
+stp_start_timer(struct stp_timer *timer, int value)
+{
+ timer->value = value;
+ timer->active = true;
+}
+
+static void
+stp_stop_timer(struct stp_timer *timer)
+{
+ timer->active = false;
+}
+
+static bool
+stp_timer_expired(struct stp_timer *timer, int elapsed, int timeout)
+{
+ if (timer->active) {
+ timer->value += elapsed;
+ if (timer->value >= timeout) {
+ timer->active = false;
+ return true;
+ }
+ }
+ return false;
+}
+
#include "packets.h"
#include "poll-loop.h"
#include "rconn.h"
+#include "stp.h"
#include "timeval.h"
#include "util.h"
#include "vconn-ssl.h"
regex_t accept_controller_regex; /* Controller vconns to accept. */
const char *accept_controller_re; /* String version of regex. */
bool update_resolv_conf; /* Update /etc/resolv.conf? */
+
+ /* Spanning tree protocol. */
+ bool stp; /* Enable spanning tree protocol? */
};
struct half {
};
struct hook {
- bool (*packet_cb)(struct relay *, int half, void *aux);
+ bool (*packet_cb[2])(struct relay *, void *aux);
void (*periodic_cb)(void *aux);
void (*wait_cb)(void *aux);
void *aux;
static void relay_wait(struct relay *);
static void relay_destroy(struct relay *);
-static struct hook make_hook(bool (*packet_cb)(struct relay *, int, void *),
+static struct hook make_hook(bool (*local_packet_cb)(struct relay *, void *),
+ bool (*remote_packet_cb)(struct relay *, void *),
void (*periodic_cb)(void *),
void (*wait_cb)(void *),
void *aux);
+static struct ofp_packet_in *get_ofp_packet_in(struct relay *);
+static bool get_ofp_packet_eth_header(struct relay *, struct ofp_packet_in **,
+ struct eth_header **);
+static void get_ofp_packet_payload(struct ofp_packet_in *, struct buffer *);
struct switch_status;
struct status_reply;
static struct hook in_band_hook_create(const struct settings *,
struct switch_status *,
struct rconn *remote);
+
+struct port_watcher;
+static struct hook port_watcher_create(struct rconn *local,
+ struct rconn *remote,
+ struct port_watcher **);
+static uint32_t port_watcher_get_flags(const struct port_watcher *,
+ int port_no);
+static void port_watcher_set_flags(struct port_watcher *,
+ int port_no, uint32_t flags, uint32_t mask);
+
+static struct hook stp_hook_create(const struct settings *,
+ struct port_watcher *,
+ struct rconn *local, struct rconn *remote);
+
static struct hook fail_open_hook_create(const struct settings *,
struct switch_status *,
struct rconn *local,
list_push_back(&relays, &controller_relay->node);
/* Set up hooks. */
+ if (s.stp) {
+ struct port_watcher *pw;
+ hooks[n_hooks++] = port_watcher_create(local_rconn, remote_rconn, &pw);
+ hooks[n_hooks++] = stp_hook_create(&s, pw, local_rconn, remote_rconn);
+ }
if (s.in_band) {
hooks[n_hooks++] = in_band_hook_create(&s, switch_status,
remote_rconn);
}
static struct hook
-make_hook(bool (*packet_cb)(struct relay *, int half, void *aux),
+make_hook(bool (*local_packet_cb)(struct relay *, void *aux),
+ bool (*remote_packet_cb)(struct relay *, void *aux),
void (*periodic_cb)(void *aux),
void (*wait_cb)(void *aux),
void *aux)
{
struct hook h;
- h.packet_cb = packet_cb;
+ h.packet_cb[HALF_LOCAL] = local_packet_cb;
+ h.packet_cb[HALF_REMOTE] = remote_packet_cb;
h.periodic_cb = periodic_cb;
h.wait_cb = wait_cb;
h.aux = aux;
return h;
}
+
+static struct ofp_packet_in *
+get_ofp_packet_in(struct relay *r)
+{
+ struct buffer *msg = r->halves[HALF_LOCAL].rxbuf;
+ struct ofp_header *oh = msg->data;
+ if (oh->type == OFPT_PACKET_IN) {
+ if (msg->size >= offsetof (struct ofp_packet_in, data)) {
+ return msg->data;
+ } else {
+ VLOG_WARN("packet too short (%zu bytes) for packet_in",
+ msg->size);
+ }
+ }
+ return NULL;
+}
+
+static bool
+get_ofp_packet_eth_header(struct relay *r, struct ofp_packet_in **opip,
+ struct eth_header **ethp)
+{
+ const int min_len = offsetof(struct ofp_packet_in, data) + ETH_HEADER_LEN;
+ struct ofp_packet_in *opi = get_ofp_packet_in(r);
+ if (opi && ntohs(opi->header.length) >= min_len) {
+ *opip = opi;
+ *ethp = (void *) opi->data;
+ return true;
+ }
+ return false;
+}
+
\f
/* OpenFlow message relaying. */
if (!this->rxbuf) {
this->rxbuf = rconn_recv(this->rconn);
- if (this->rxbuf) {
+ if (this->rxbuf && (i == HALF_REMOTE || !r->is_mgmt_conn)) {
const struct hook *h;
for (h = hooks; h < &hooks[n_hooks]; h++) {
- if (h->packet_cb(r, i, h->aux)) {
+ if (h->packet_cb[i] && h->packet_cb[i](r, h->aux)) {
buffer_delete(this->rxbuf);
this->rxbuf = NULL;
progress = true;
free(r);
}
\f
+/* Port status watcher. */
+
+typedef void port_watcher_cb_func(uint16_t port_no,
+ const struct ofp_phy_port *old,
+ const struct ofp_phy_port *new,
+ void *aux);
+
+struct port_watcher_cb {
+ port_watcher_cb_func *function;
+ void *aux;
+};
+
+struct port_watcher {
+ struct rconn *local_rconn;
+ struct rconn *remote_rconn;
+ struct ofp_phy_port ports[OFPP_MAX + 1];
+ time_t last_feature_request;
+ bool got_feature_reply;
+ int n_txq;
+ struct port_watcher_cb cbs[2];
+ int n_cbs;
+};
+
+/* Returns the number of fields that differ from 'a' to 'b'. */
+static int
+opp_differs(const struct ofp_phy_port *a, const struct ofp_phy_port *b)
+{
+ BUILD_ASSERT_DECL(sizeof *a == 36); /* Trips when we add or remove fields. */
+ return ((a->port_no != b->port_no)
+ + (memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr) != 0)
+ + (memcmp(a->name, b->name, sizeof a->name) != 0)
+ + (a->flags != b->flags)
+ + (a->speed != b->speed)
+ + (a->features != b->features));
+}
+
+static void
+sanitize_opp(struct ofp_phy_port *opp)
+{
+ size_t i;
+
+ for (i = 0; i < sizeof opp->name; i++) {
+ char c = opp->name[i];
+ if (c && (c < 0x20 || c > 0x7e)) {
+ opp->name[i] = '.';
+ }
+ }
+ opp->name[sizeof opp->name - 1] = '\0';
+}
+
+static int
+port_no_to_pw_idx(int port_no)
+{
+ return (port_no < OFPP_MAX ? port_no
+ : port_no == OFPP_LOCAL ? OFPP_MAX
+ : -1);
+}
+
+static void
+call_pw_callbacks(struct port_watcher *pw, int port_no,
+ const struct ofp_phy_port *old,
+ const struct ofp_phy_port *new)
+{
+ if (opp_differs(old, new)) {
+ int i;
+ for (i = 0; i < pw->n_cbs; i++) {
+ pw->cbs[i].function(port_no, old, new, pw->cbs[i].aux);
+ }
+ }
+}
+
+static void
+update_phy_port(struct port_watcher *pw, struct ofp_phy_port *opp,
+ uint8_t reason, bool seen[OFPP_MAX + 1])
+{
+ struct ofp_phy_port *pw_opp;
+ struct ofp_phy_port old;
+ uint16_t port_no;
+ int idx;
+
+ port_no = ntohs(opp->port_no);
+ idx = port_no_to_pw_idx(port_no);
+ if (idx < 0) {
+ return;
+ }
+
+ if (seen) {
+ seen[idx] = true;
+ }
+
+ pw_opp = &pw->ports[idx];
+ old = *pw_opp;
+ if (reason == OFPPR_DELETE) {
+ memset(pw_opp, 0, sizeof *pw_opp);
+ pw_opp->port_no = htons(OFPP_NONE);
+ } else if (reason == OFPPR_MOD || reason == OFPPR_ADD) {
+ *pw_opp = *opp;
+ sanitize_opp(pw_opp);
+ }
+ call_pw_callbacks(pw, port_no, &old, pw_opp);
+}
+
+static bool
+port_watcher_local_packet_cb(struct relay *r, void *pw_)
+{
+ struct port_watcher *pw = pw_;
+ struct buffer *msg = r->halves[HALF_LOCAL].rxbuf;
+ struct ofp_header *oh = msg->data;
+
+ if (oh->type == OFPT_FEATURES_REPLY
+ && msg->size >= offsetof(struct ofp_switch_features, ports)) {
+ struct ofp_switch_features *osf = msg->data;
+ bool seen[ARRAY_SIZE(pw->ports)];
+ size_t n_ports;
+ size_t i;
+
+ pw->got_feature_reply = true;
+
+ /* Update each port included in the message. */
+ memset(seen, 0, sizeof seen);
+ n_ports = ((msg->size - offsetof(struct ofp_switch_features, ports))
+ / sizeof *osf->ports);
+ for (i = 0; i < n_ports; i++) {
+ update_phy_port(pw, &osf->ports[i], OFPPR_MOD, seen);
+ }
+
+ /* Delete all the ports not included in the message. */
+ for (i = 0; i < ARRAY_SIZE(pw->ports); i++) {
+ if (!seen[i]) {
+ update_phy_port(pw, &pw->ports[i], OFPPR_DELETE, NULL);
+ }
+ }
+ } else if (oh->type == OFPT_PORT_STATUS
+ && msg->size >= sizeof(struct ofp_port_status)) {
+ struct ofp_port_status *ops = msg->data;
+ update_phy_port(pw, &ops->desc, ops->reason, NULL);
+ }
+ return false;
+}
+
+static void
+port_watcher_periodic_cb(void *pw_)
+{
+ struct port_watcher *pw = pw_;
+
+ if (!pw->got_feature_reply && time_now() >= pw->last_feature_request + 5) {
+ struct buffer *b;
+ make_openflow(sizeof(struct ofp_header), OFPT_FEATURES_REQUEST, &b);
+ rconn_send_with_limit(pw->local_rconn, b, &pw->n_txq, 1);
+ pw->last_feature_request = time_now();
+ }
+}
+
+static void
+put_duplexes(struct ds *ds, const char *name, uint32_t features,
+ uint32_t hd_bit, uint32_t fd_bit)
+{
+ if (features & (hd_bit | fd_bit)) {
+ ds_put_format(ds, " %s", name);
+ if (features & hd_bit) {
+ ds_put_cstr(ds, "(HD)");
+ }
+ if (features & fd_bit) {
+ ds_put_cstr(ds, "(FD)");
+ }
+ }
+}
+
+static void
+log_port_status(uint16_t port_no,
+ const struct ofp_phy_port *old,
+ const struct ofp_phy_port *new,
+ void *aux)
+{
+ if (VLOG_IS_DBG_ENABLED()) {
+ bool was_enabled = old->port_no != htons(OFPP_NONE);
+ bool now_enabled = new->port_no != htons(OFPP_NONE);
+ uint32_t features = ntohl(new->features);
+ struct ds ds;
+
+ if (old->flags != new->flags && opp_differs(old, new) == 1) {
+ /* Don't care if only flags changed. */
+ return;
+ }
+
+ ds_init(&ds);
+ ds_put_format(&ds, "\"%s\", "ETH_ADDR_FMT, new->name,
+ ETH_ADDR_ARGS(new->hw_addr));
+ if (ntohl(new->speed)) {
+ ds_put_format(&ds, ", speed %"PRIu32, ntohl(new->speed));
+ }
+ if (features & (OFPPF_10MB_HD | OFPPF_10MB_FD
+ | OFPPF_100MB_HD | OFPPF_100MB_FD
+ | OFPPF_1GB_HD | OFPPF_1GB_FD | OFPPF_10GB_FD)) {
+ ds_put_cstr(&ds, ", supports");
+ put_duplexes(&ds, "10M", features, OFPPF_10MB_HD, OFPPF_10MB_FD);
+ put_duplexes(&ds, "100M", features,
+ OFPPF_100MB_HD, OFPPF_100MB_FD);
+ put_duplexes(&ds, "1G", features, OFPPF_100MB_HD, OFPPF_100MB_FD);
+ if (features & OFPPF_10GB_FD) {
+ ds_put_cstr(&ds, " 10G");
+ }
+ }
+ if (was_enabled != now_enabled) {
+ if (now_enabled) {
+ VLOG_DBG("Port %d added: %s", port_no, ds_cstr(&ds));
+ } else {
+ VLOG_DBG("Port %d deleted", port_no);
+ }
+ } else {
+ VLOG_DBG("Port %d changed: %s", port_no, ds_cstr(&ds));
+ }
+ ds_destroy(&ds);
+ }
+}
+
+static void
+port_watcher_register_callback(struct port_watcher *pw,
+ port_watcher_cb_func *function,
+ void *aux)
+{
+ assert(pw->n_cbs < ARRAY_SIZE(pw->cbs));
+ pw->cbs[pw->n_cbs].function = function;
+ pw->cbs[pw->n_cbs].aux = aux;
+ pw->n_cbs++;
+}
+
+static uint32_t
+port_watcher_get_flags(const struct port_watcher *pw, int port_no)
+{
+ int idx = port_no_to_pw_idx(port_no);
+ return idx >= 0 ? ntohl(pw->ports[idx].flags) : 0;
+}
+
+static void
+port_watcher_set_flags(struct port_watcher *pw,
+ int port_no, uint32_t flags, uint32_t mask)
+{
+ struct ofp_phy_port old;
+ struct ofp_phy_port *p;
+ struct ofp_port_mod *opm;
+ struct ofp_port_status *ops;
+ struct buffer *b;
+ int idx;
+
+ idx = port_no_to_pw_idx(port_no);
+ if (idx < 0) {
+ return;
+ }
+
+ p = &pw->ports[idx];
+ if (!((ntohl(p->flags) ^ flags) & mask)) {
+ return;
+ }
+ old = *p;
+
+ /* Update our idea of the flags. */
+ p->flags = ntohl(flags);
+ call_pw_callbacks(pw, port_no, &old, p);
+
+ /* Change the flags in the datapath. */
+ opm = make_openflow(sizeof *opm, OFPT_PORT_MOD, &b);
+ opm->mask = htonl(mask);
+ opm->desc = *p;
+ rconn_send(pw->local_rconn, b, NULL);
+
+ /* Notify the controller that the flags changed. */
+ ops = make_openflow(sizeof *ops, OFPT_PORT_STATUS, &b);
+ ops->reason = OFPPR_MOD;
+ ops->desc = *p;
+ rconn_send(pw->remote_rconn, b, NULL);
+}
+
+static bool
+port_watcher_is_ready(const struct port_watcher *pw)
+{
+ return pw->got_feature_reply;
+}
+
+static struct hook
+port_watcher_create(struct rconn *local_rconn, struct rconn *remote_rconn,
+ struct port_watcher **pwp)
+{
+ struct port_watcher *pw;
+ int i;
+
+ pw = *pwp = xcalloc(1, sizeof *pw);
+ pw->local_rconn = local_rconn;
+ pw->remote_rconn = remote_rconn;
+ pw->last_feature_request = TIME_MIN;
+ for (i = 0; i < OFPP_MAX; i++) {
+ pw->ports[i].port_no = htons(OFPP_NONE);
+ }
+ port_watcher_register_callback(pw, log_port_status, NULL);
+ return make_hook(port_watcher_local_packet_cb, NULL,
+ port_watcher_periodic_cb, NULL, pw);
+}
+\f
+/* Spanning tree protocol. */
+
+/* Extra time, in seconds, at boot before going into fail-open, to give the
+ * spanning tree protocol time to figure out the network layout. */
+#define STP_EXTRA_BOOT_TIME 30
+
+struct stp_data {
+ struct stp *stp;
+ struct port_watcher *pw;
+ struct rconn *local_rconn;
+ struct rconn *remote_rconn;
+ uint8_t dpid[ETH_ADDR_LEN];
+ long long int last_tick_256ths;
+ int n_txq;
+};
+
+static bool
+stp_local_packet_cb(struct relay *r, void *stp_)
+{
+ struct stp_data *stp = stp_;
+ struct ofp_packet_in *opi;
+ struct eth_header *eth;
+ struct llc_header *llc;
+ struct buffer payload;
+ uint16_t port_no;
+ struct flow flow;
+
+ if (!get_ofp_packet_eth_header(r, &opi, ð)
+ || !eth_addr_equals(eth->eth_dst, stp_eth_addr)) {
+ return false;
+ }
+
+ port_no = ntohs(opi->in_port);
+ if (port_no >= STP_MAX_PORTS) {
+ /* STP only supports 255 ports. */
+ return false;
+ }
+ if (port_watcher_get_flags(stp->pw, port_no) & OFPPFL_NO_STP) {
+ /* We're not doing STP on this port. */
+ return false;
+ }
+
+ if (opi->reason == OFPR_ACTION) {
+ /* The controller set up a flow for this, so we won't intercept it. */
+ return false;
+ }
+
+ get_ofp_packet_payload(opi, &payload);
+ flow_extract(&payload, port_no, &flow);
+ if (flow.dl_type != htons(OFP_DL_TYPE_NOT_ETH_TYPE)) {
+ VLOG_DBG("non-LLC frame received on STP multicast address");
+ return false;
+ }
+ llc = buffer_at_assert(&payload, sizeof *eth, sizeof *llc);
+ if (llc->llc_dsap != STP_LLC_DSAP) {
+ VLOG_DBG("bad DSAP 0x%02"PRIx8" received on STP multicast address",
+ llc->llc_dsap);
+ return false;
+ }
+
+ /* Trim off padding on payload. */
+ if (payload.size > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
+ payload.size = ntohs(eth->eth_type) + ETH_HEADER_LEN;
+ }
+ if (buffer_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
+ struct stp_port *p = stp_get_port(stp->stp, port_no);
+ stp_received_bpdu(p, payload.data, payload.size);
+ }
+
+ return true;
+}
+
+static long long int
+time_256ths(void)
+{
+ return time_msec() * 256 / 1000;
+}
+
+static void
+stp_periodic_cb(void *stp_)
+{
+ struct stp_data *stp = stp_;
+ long long int now_256ths = time_256ths();
+ long long int elapsed_256ths = now_256ths - stp->last_tick_256ths;
+ struct stp_port *p;
+
+ if (!port_watcher_is_ready(stp->pw)) {
+ /* Can't start STP until we know port flags, because port flags can
+ * disable STP. */
+ return;
+ }
+ if (elapsed_256ths <= 0) {
+ return;
+ }
+
+ stp_tick(stp->stp, MIN(INT_MAX, elapsed_256ths));
+ stp->last_tick_256ths = now_256ths;
+
+ while (stp_get_changed_port(stp->stp, &p)) {
+ int port_no = stp_port_no(p);
+ enum stp_state state = stp_port_get_state(p);
+
+ if (state != STP_DISABLED) {
+ VLOG_WARN("STP: Port %d entered %s state",
+ port_no, stp_state_name(state));
+ }
+ if (!(port_watcher_get_flags(stp->pw, port_no) & OFPPFL_NO_STP)) {
+ uint32_t flags;
+ switch (state) {
+ case STP_LISTENING:
+ flags = OFPPFL_STP_LISTEN;
+ break;
+ case STP_LEARNING:
+ flags = OFPPFL_STP_LEARN;
+ break;
+ case STP_DISABLED:
+ case STP_FORWARDING:
+ flags = OFPPFL_STP_FORWARD;
+ break;
+ case STP_BLOCKING:
+ flags = OFPPFL_STP_BLOCK;
+ break;
+ default:
+ VLOG_DBG_RL(&vrl, "STP: Port %d has bad state %x",
+ port_no, state);
+ flags = OFPPFL_STP_FORWARD;
+ break;
+ }
+ if (!stp_forward_in_state(state)) {
+ flags |= OFPPFL_NO_FLOOD;
+ }
+ port_watcher_set_flags(stp->pw, port_no, flags,
+ OFPPFL_STP_MASK | OFPPFL_NO_FLOOD);
+ } else {
+ /* We don't own those flags. */
+ }
+ }
+}
+
+static void
+stp_wait_cb(void *stp_ UNUSED)
+{
+ poll_timer_wait(1000);
+}
+
+static void
+send_bpdu(const void *bpdu, size_t bpdu_size, int port_no, void *stp_)
+{
+ struct stp_data *stp = stp_;
+ struct eth_header *eth;
+ struct llc_header *llc;
+ struct buffer pkt, *opo;
+
+ /* Packet skeleton. */
+ buffer_init(&pkt, ETH_HEADER_LEN + LLC_HEADER_LEN + bpdu_size);
+ eth = buffer_put_uninit(&pkt, sizeof *eth);
+ llc = buffer_put_uninit(&pkt, sizeof *llc);
+ buffer_put(&pkt, bpdu, bpdu_size);
+
+ /* 802.2 header. */
+ memcpy(eth->eth_dst, stp_eth_addr, ETH_ADDR_LEN);
+ memcpy(eth->eth_src, stp->pw->ports[port_no].hw_addr, ETH_ADDR_LEN);
+ eth->eth_type = htons(pkt.size - ETH_HEADER_LEN);
+
+ /* LLC header. */
+ llc->llc_dsap = STP_LLC_DSAP;
+ llc->llc_ssap = STP_LLC_SSAP;
+ llc->llc_cntl = STP_LLC_CNTL;
+
+ opo = make_unbuffered_packet_out(&pkt, OFPP_NONE, port_no);
+ buffer_uninit(&pkt);
+ rconn_send_with_limit(stp->local_rconn, opo, &stp->n_txq, OFPP_MAX);
+}
+
+static void
+stp_port_watcher_cb(uint16_t port_no,
+ const struct ofp_phy_port *old,
+ const struct ofp_phy_port *new,
+ void *stp_)
+{
+ struct stp_data *stp = stp_;
+ struct stp_port *p;
+
+ /* STP only supports a maximum of 255 ports, one less than OpenFlow. We
+ * don't support STP on OFPP_LOCAL, either. */
+ if (port_no >= STP_MAX_PORTS) {
+ return;
+ }
+
+ p = stp_get_port(stp->stp, port_no);
+ if (new->port_no == htons(OFPP_NONE)
+ || new->flags & htonl(OFPPFL_NO_STP)) {
+ stp_port_disable(p);
+ } else {
+ stp_port_enable(p);
+ stp_port_set_speed(p, new->speed);
+ }
+}
+
+static struct hook
+stp_hook_create(const struct settings *s, struct port_watcher *pw,
+ struct rconn *local, struct rconn *remote)
+{
+ uint8_t dpid[ETH_ADDR_LEN];
+ struct netdev *netdev;
+ struct stp_data *stp;
+ int retval;
+
+ retval = netdev_open(s->of_name, NETDEV_ETH_TYPE_NONE, &netdev);
+ if (retval) {
+ fatal(retval, "Could not open %s device", s->of_name);
+ }
+ memcpy(dpid, netdev_get_etheraddr(netdev), ETH_ADDR_LEN);
+ netdev_close(netdev);
+
+ stp = xcalloc(1, sizeof *stp);
+ stp->stp = stp_create("stp", eth_addr_to_uint64(dpid), send_bpdu, stp);
+ stp->pw = pw;
+ memcpy(stp->dpid, dpid, ETH_ADDR_LEN);
+ stp->local_rconn = local;
+ stp->remote_rconn = remote;
+ stp->last_tick_256ths = time_256ths();
+
+ port_watcher_register_callback(pw, stp_port_watcher_cb, stp);
+ return make_hook(stp_local_packet_cb, NULL,
+ stp_periodic_cb, stp_wait_cb, stp);
+}
+\f
/* In-band control. */
struct in_band_data {
}
static void
-in_band_learn_mac(struct in_band_data *in_band, const struct flow *flow)
+in_band_learn_mac(struct in_band_data *in_band,
+ uint16_t in_port, const uint8_t src_mac[ETH_ADDR_LEN])
{
- uint16_t in_port = ntohs(flow->in_port);
- if (mac_learning_learn(in_band->ml, flow->dl_src, in_port)) {
+ if (mac_learning_learn(in_band->ml, src_mac, in_port)) {
VLOG_DBG_RL(&vrl, "learned that "ETH_ADDR_FMT" is on port %"PRIu16,
- ETH_ADDR_ARGS(flow->dl_src), in_port);
+ ETH_ADDR_ARGS(src_mac), in_port);
}
}
static bool
-in_band_packet_cb(struct relay *r, int half, void *in_band_)
+in_band_local_packet_cb(struct relay *r, void *in_band_)
{
struct in_band_data *in_band = in_band_;
struct rconn *rc = r->halves[HALF_LOCAL].rconn;
- struct buffer *msg = r->halves[HALF_LOCAL].rxbuf;
struct ofp_packet_in *opi;
- struct ofp_header *oh;
- size_t pkt_ofs, pkt_len;
- struct buffer pkt;
+ struct eth_header *eth;
+ struct buffer payload;
struct flow flow;
- uint16_t in_port, out_port;
+ uint16_t in_port;
+ int out_port;
- if (half != HALF_LOCAL || r->is_mgmt_conn) {
+ if (!get_ofp_packet_eth_header(r, &opi, ð)) {
return false;
}
-
- oh = msg->data;
- if (oh->type != OFPT_PACKET_IN) {
- return false;
- }
- if (msg->size < offsetof(struct ofp_packet_in, data)) {
- VLOG_WARN_RL(&vrl, "packet too short (%zu bytes) for packet_in",
- msg->size);
- return false;
- }
-
- /* Extract flow data from 'opi' into 'flow'. */
- opi = msg->data;
in_port = ntohs(opi->in_port);
- 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);
/* Deal with local stuff. */
if (in_port == OFPP_LOCAL) {
/* Sent by secure channel. */
- out_port = mac_learning_lookup(in_band->ml, flow.dl_dst);
- } else if (eth_addr_equals(flow.dl_dst, in_band->mac)) {
+ out_port = mac_learning_lookup(in_band->ml, eth->eth_dst);
+ } else if (eth_addr_equals(eth->eth_dst, in_band->mac)) {
/* Sent to secure channel. */
out_port = OFPP_LOCAL;
- in_band_learn_mac(in_band, &flow);
- } else if (flow.dl_type == htons(ETH_TYPE_ARP)
- && eth_addr_is_broadcast(flow.dl_dst)
- && is_controller_mac(flow.dl_src, in_band)) {
+ in_band_learn_mac(in_band, in_port, eth->eth_src);
+ } else if (eth->eth_type == htons(ETH_TYPE_ARP)
+ && eth_addr_is_broadcast(eth->eth_dst)
+ && is_controller_mac(eth->eth_src, in_band)) {
/* ARP sent by controller. */
out_port = OFPP_FLOOD;
- } else if (is_controller_mac(flow.dl_dst, in_band)
- || is_controller_mac(flow.dl_src, in_band)) {
+ } else if (is_controller_mac(eth->eth_dst, in_band)
+ || is_controller_mac(eth->eth_src, in_band)) {
/* Traffic to or from controller. Switch it by hand. */
- in_band_learn_mac(in_band, &flow);
- out_port = mac_learning_lookup(in_band->ml, flow.dl_dst);
+ in_band_learn_mac(in_band, in_port, eth->eth_src);
+ out_port = mac_learning_lookup(in_band->ml, eth->eth_dst);
} else {
- return false;
+ const uint8_t *controller_mac;
+ controller_mac = get_controller_mac(in_band);
+ if (eth->eth_type == htons(ETH_TYPE_ARP)
+ && eth_addr_is_broadcast(eth->eth_dst)
+ && is_controller_mac(eth->eth_src, in_band)) {
+ /* ARP sent by controller. */
+ out_port = OFPP_FLOOD;
+ } else if (is_controller_mac(eth->eth_dst, in_band)
+ && in_port == mac_learning_lookup(in_band->ml,
+ controller_mac)) {
+ /* Drop controller traffic that arrives on the controller port. */
+ out_port = -1;
+ } else {
+ return false;
+ }
}
+ get_ofp_packet_payload(opi, &payload);
+ flow_extract(&payload, in_port, &flow);
if (in_port == out_port) {
/* The input and output port match. Set up a flow to drop packets. */
queue_tx(rc, in_band, make_add_flow(&flow, ntohl(opi->buffer_id),
/* If the switch didn't buffer the packet, we need to send a copy. */
if (ntohl(opi->buffer_id) == UINT32_MAX) {
queue_tx(rc, in_band,
- make_unbuffered_packet_out(&pkt, in_port, out_port));
+ make_unbuffered_packet_out(&payload, in_port, out_port));
}
} else {
/* We don't know that MAC. 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);
+ b = make_unbuffered_packet_out(&payload, in_port, out_port);
} else {
b = make_buffered_packet_out(ntohl(opi->buffer_id),
in_port, out_port);
}
}
+static void
+get_ofp_packet_payload(struct ofp_packet_in *opi, struct buffer *payload)
+{
+ payload->data = opi->data;
+ payload->size = ntohs(opi->header.length) - offsetof(struct ofp_packet_in,
+ data);
+}
+
static struct hook
in_band_hook_create(const struct settings *s, struct switch_status *ss,
struct rconn *remote)
ETH_ADDR_LEN);
in_band->controller = remote;
switch_status_register_category(ss, "in-band", in_band_status_cb, in_band);
- return make_hook(in_band_packet_cb, NULL, NULL, in_band);
+ return make_hook(in_band_local_packet_cb, NULL, NULL, NULL, in_band);
}
\f
/* Fail open support. */
struct rconn *remote_rconn;
struct lswitch *lswitch;
int last_disconn_secs;
+ time_t boot_deadline;
};
/* Causes 'r' to enter or leave fail-open mode, if appropriate. */
int disconn_secs;
bool open;
+ if (time_now() < fail_open->boot_deadline) {
+ return;
+ }
disconn_secs = rconn_disconnected_duration(fail_open->remote_rconn);
open = disconn_secs >= fail_open->s->probe_interval * 3;
if (open != (fail_open->lswitch != NULL)) {
}
static bool
-fail_open_packet_cb(struct relay *r, int half, void *fail_open_)
+fail_open_local_packet_cb(struct relay *r, void *fail_open_)
{
struct fail_open_data *fail_open = fail_open_;
- if (half != HALF_LOCAL || r->is_mgmt_conn || !fail_open->lswitch) {
+ if (!fail_open->lswitch) {
return false;
} else {
lswitch_process_packet(fail_open->lswitch, fail_open->local_rconn,
fail_open->local_rconn = local_rconn;
fail_open->remote_rconn = remote_rconn;
fail_open->lswitch = NULL;
+ fail_open->boot_deadline = time_now() + s->probe_interval * 3;
+ if (s->stp) {
+ fail_open->boot_deadline += STP_EXTRA_BOOT_TIME;
+ }
switch_status_register_category(ss, "fail-open",
fail_open_status_cb, fail_open);
- return make_hook(fail_open_packet_cb, fail_open_periodic_cb, NULL,
- fail_open);
+ return make_hook(fail_open_local_packet_cb, NULL,
+ fail_open_periodic_cb, NULL, fail_open);
}
\f
struct rate_limiter {
}
static bool
-rate_limit_packet_cb(struct relay *r, int half, void *rl_)
+rate_limit_local_packet_cb(struct relay *r, void *rl_)
{
struct rate_limiter *rl = rl_;
const struct settings *s = rl->s;
- struct buffer *msg = r->halves[HALF_LOCAL].rxbuf;
- struct ofp_header *oh;
+ struct ofp_packet_in *opi;
- if (half == HALF_REMOTE) {
- return false;
- }
-
- oh = msg->data;
- if (oh->type != OFPT_PACKET_IN) {
- return false;
- }
- if (msg->size < offsetof(struct ofp_packet_in, data)) {
- VLOG_WARN_RL(&vrl, "packet too short (%zu bytes) for packet_in",
- msg->size);
+ opi = get_ofp_packet_in(r);
+ if (!opi) {
return false;
}
return false;
} else {
/* Otherwise queue it up for the periodic callback to drain out. */
- struct ofp_packet_in *opi = msg->data;
+ struct buffer *msg = r->halves[HALF_LOCAL].rxbuf;
int port = ntohs(opi->in_port) % OFPP_MAX;
if (rl->n_queued >= s->burst_limit) {
drop_packet(rl);
rl->tokens = s->rate_limit * 100;
switch_status_register_category(ss, "rate-limit",
rate_limit_status_cb, rl);
- return make_hook(rate_limit_packet_cb, rate_limit_periodic_cb,
+ return make_hook(rate_limit_local_packet_cb, NULL, rate_limit_periodic_cb,
rate_limit_wait_cb, rl);
}
\f
};
static bool
-switch_status_packet_cb(struct relay *r, int half, void *ss_)
+switch_status_remote_packet_cb(struct relay *r, void *ss_)
{
struct switch_status *ss = ss_;
struct rconn *rc = r->halves[HALF_REMOTE].rconn;
struct buffer *b;
int retval;
- if (half == HALF_LOCAL) {
- return false;
- }
-
oh = msg->data;
if (oh->type != OFPT_STATS_REQUEST) {
return false;
config_status_cb, (void *) s);
switch_status_register_category(ss, "switch", switch_status_cb, ss);
*ssp = ss;
- return make_hook(switch_status_packet_cb, NULL, NULL, ss);
+ return make_hook(NULL, switch_status_remote_packet_cb, NULL, NULL, ss);
}
static void
#include "packets.h"
#include "poll-loop.h"
#include "rconn.h"
+#include "stp.h"
#include "vconn.h"
#include "table.h"
#include "timeval.h"
#define THIS_MODULE VLM_datapath
#include "vlog.h"
-enum br_port_flags {
- BRPF_NO_FLOOD = 1 << 0,
-};
-
-enum br_port_status {
- BRPS_PORT_DOWN = 1 << 0,
- BRPS_LINK_DOWN = 1 << 1,
-};
-
extern char mfr_desc;
extern char hw_desc;
extern char sw_desc;
| (1 << OFPAT_SET_TP_SRC) \
| (1 << OFPAT_SET_TP_DST) )
+#define PORT_STATUS_BITS (OFPPFL_PORT_DOWN | OFPPFL_LINK_DOWN)
+#define PORT_FLAG_BITS (~PORT_STATUS_BITS)
+
struct sw_port {
- uint32_t flags; /* BRPF_* flags */
- uint32_t status; /* BRPS_* flags */
+ uint32_t flags; /* Some subset of PORT_FLAG_BITS. */
+ uint32_t status; /* Some subset of PORT_STATUS_BITS. */
struct datapath *dp;
struct netdev *netdev;
struct list node; /* Element in datapath.ports. */
static void remote_destroy(struct remote *);
void dp_output_port(struct datapath *, struct buffer *,
- int in_port, int out_port);
+ int in_port, int out_port, bool ignore_no_fwd);
void dp_update_port_flags(struct datapath *dp, const struct ofp_port_mod *opm);
void dp_output_control(struct datapath *, struct buffer *, int in_port,
size_t max_len, int reason);
static void del_switch_port(struct sw_port *p);
static void execute_actions(struct datapath *, struct buffer *,
int in_port, const struct sw_flow_key *,
- const struct ofp_action *, int n_actions);
+ const struct ofp_action *, int n_actions,
+ bool ignore_no_fwd);
static void modify_vlan(struct buffer *buffer, const struct sw_flow_key *key,
const struct ofp_action *a);
static void modify_nh(struct buffer *buffer, uint16_t eth_proto,
#define PKT_COOKIE_BITS (32 - PKT_BUFFER_BITS)
-int run_flow_through_tables(struct datapath *, struct buffer *, int in_port);
-void fwd_port_input(struct datapath *, struct buffer *, int in_port);
+int run_flow_through_tables(struct datapath *, struct buffer *,
+ struct sw_port *);
+void fwd_port_input(struct datapath *, struct buffer *, struct sw_port *);
int fwd_control_input(struct datapath *, const struct sender *,
const void *, size_t);
if (!error) {
p->rx_packets++;
p->rx_bytes += buffer->size;
- fwd_port_input(dp, buffer, port_no(dp, p));
+ fwd_port_input(dp, buffer, p);
buffer = NULL;
} else if (error != EAGAIN) {
VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
if (port_no(dp, p) == in_port) {
continue;
}
- if (flood && p->flags & BRPF_NO_FLOOD) {
+ if (flood && p->flags & OFPPFL_NO_FLOOD) {
continue;
}
if (prev_port != -1) {
- dp_output_port(dp, buffer_clone(buffer), in_port, prev_port);
+ dp_output_port(dp, buffer_clone(buffer), in_port, prev_port,
+ false);
}
prev_port = port_no(dp, p);
}
if (prev_port != -1)
- dp_output_port(dp, buffer, in_port, prev_port);
+ dp_output_port(dp, buffer, in_port, prev_port, false);
else
buffer_delete(buffer);
{
if (out_port >= 0 && out_port < OFPP_MAX) {
struct sw_port *p = &dp->ports[out_port];
- if (p->netdev != NULL && !(p->status & BRPS_PORT_DOWN)) {
+ if (p->netdev != NULL && !(p->status & OFPPFL_PORT_DOWN)) {
if (!netdev_send(p->netdev, buffer)) {
p->tx_packets++;
p->tx_bytes += buffer->size;
*/
void
dp_output_port(struct datapath *dp, struct buffer *buffer,
- int in_port, int out_port)
+ int in_port, int out_port, bool ignore_no_fwd)
{
assert(buffer);
} else if (out_port == OFPP_IN_PORT) {
output_packet(dp, buffer, in_port);
} else if (out_port == OFPP_TABLE) {
- if (run_flow_through_tables(dp, buffer, in_port)) {
+ struct sw_port *p = in_port < OFPP_MAX ? &dp->ports[in_port] : 0;
+ if (run_flow_through_tables(dp, buffer, p)) {
buffer_delete(buffer);
}
} else {
desc->flags = 0;
desc->features = htonl(netdev_get_features(p->netdev));
desc->speed = htonl(netdev_get_speed(p->netdev));
-
- if (p->flags & BRPF_NO_FLOOD) {
- desc->flags |= htonl(OFPPFL_NO_FLOOD);
- } else if (p->status & BRPS_PORT_DOWN) {
- desc->flags |= htonl(OFPPFL_PORT_DOWN);
- } else if (p->status & BRPS_LINK_DOWN) {
- desc->flags |= htonl(OFPPFL_LINK_DOWN);
- }
+ desc->flags = htonl(p->flags | p->status);
}
static void
int port_no = ntohs(opp->port_no);
if (port_no < OFPP_MAX) {
struct sw_port *p = &dp->ports[port_no];
+ uint32_t flag_mask;
/* Make sure the port id hasn't changed since this was sent */
if (!p || memcmp(opp->hw_addr, netdev_get_etheraddr(p->netdev),
}
- if (opm->mask & htonl(OFPPFL_NO_FLOOD)) {
- if (opp->flags & htonl(OFPPFL_NO_FLOOD))
- p->flags |= BRPF_NO_FLOOD;
- else
- p->flags &= ~BRPF_NO_FLOOD;
+ flag_mask = ntohl(opm->mask) & PORT_FLAG_BITS;
+ if (flag_mask) {
+ p->flags &= ~flag_mask;
+ p->flags |= ntohl(opp->flags) & flag_mask;
}
if (opm->mask & htonl(OFPPFL_PORT_DOWN)) {
if ((opp->flags & htonl(OFPPFL_PORT_DOWN))
- && (p->status & BRPS_PORT_DOWN) == 0) {
- p->status |= BRPS_PORT_DOWN;
+ && (p->status & OFPPFL_PORT_DOWN) == 0) {
+ p->status |= OFPPFL_PORT_DOWN;
netdev_turn_flags_off(p->netdev, NETDEV_UP, true);
} else if ((opp->flags & htonl(OFPPFL_PORT_DOWN)) == 0
- && (p->status & BRPS_PORT_DOWN)) {
- p->status &= ~BRPS_PORT_DOWN;
+ && (p->status & OFPPFL_PORT_DOWN)) {
+ p->status &= ~OFPPFL_PORT_DOWN;
netdev_turn_flags_on(p->netdev, NETDEV_UP, true);
}
}
return 0;
} else {
if (flags & NETDEV_UP) {
- p->status &= ~BRPS_PORT_DOWN;
+ p->status &= ~OFPPFL_PORT_DOWN;
} else {
- p->status |= BRPS_PORT_DOWN;
+ p->status |= OFPPFL_PORT_DOWN;
}
}
* error. */
retval = netdev_get_link_status(p->netdev);
if (retval == 1) {
- p->status &= ~BRPS_LINK_DOWN;
+ p->status &= ~OFPPFL_LINK_DOWN;
} else if (retval == 0) {
- p->status |= BRPS_LINK_DOWN;
+ p->status |= OFPPFL_LINK_DOWN;
}
return (orig_status != p->status);
}
\f
-/* 'buffer' was received on 'in_port', a physical switch port between 0 and
- * OFPP_MAX. Process it according to 'dp''s flow table. Returns 0 if
+/* 'buffer' was received on 'p', which may be a a physical switch port or a
+ * null pointer. Process it according to 'dp''s flow table. Returns 0 if
* successful, in which case 'buffer' is destroyed, or -ESRCH if there is no
* matching flow, in which case 'buffer' still belongs to the caller. */
int run_flow_through_tables(struct datapath *dp, struct buffer *buffer,
- int in_port)
+ struct sw_port *p)
{
struct sw_flow_key key;
struct sw_flow *flow;
key.wildcards = 0;
- if (flow_extract(buffer, in_port, &key.flow)
+ if (flow_extract(buffer, p ? port_no(dp, p) : OFPP_NONE, &key.flow)
&& (dp->flags & OFPC_FRAG_MASK) == OFPC_FRAG_DROP) {
/* Drop fragment. */
buffer_delete(buffer);
return 0;
}
+ if (p && p->flags & (OFPPFL_NO_RECV | OFPPFL_NO_RECV_STP)
+ && p->flags & (!eth_addr_equals(key.flow.dl_dst, stp_eth_addr)
+ ? OFPPFL_NO_RECV : OFPPFL_NO_RECV_STP)) {
+ buffer_delete(buffer);
+ return 0;
+ }
flow = chain_lookup(dp->chain, &key);
if (flow != NULL) {
flow_used(flow, buffer);
- execute_actions(dp, buffer, in_port, &key,
- flow->actions, flow->n_actions);
+ execute_actions(dp, buffer, port_no(dp, p),
+ &key, flow->actions, flow->n_actions, false);
return 0;
} else {
return -ESRCH;
}
}
-/* 'buffer' was received on 'in_port', a physical switch port between 0 and
- * OFPP_MAX. Process it according to 'dp''s flow table, sending it up to the
- * controller if no flow matches. Takes ownership of 'buffer'. */
-void fwd_port_input(struct datapath *dp, struct buffer *buffer, int in_port)
+/* 'buffer' was received on 'p', which may be a a physical switch port or a
+ * null pointer. Process it according to 'dp''s flow table, sending it up to
+ * the controller if no flow matches. Takes ownership of 'buffer'. */
+void fwd_port_input(struct datapath *dp, struct buffer *buffer,
+ struct sw_port *p)
{
- if (run_flow_through_tables(dp, buffer, in_port)) {
- dp_output_control(dp, buffer, in_port, dp->miss_send_len,
- OFPR_NO_MATCH);
+ if (run_flow_through_tables(dp, buffer, p)) {
+ dp_output_control(dp, buffer, port_no(dp, p),
+ dp->miss_send_len, OFPR_NO_MATCH);
}
}
static void
do_output(struct datapath *dp, struct buffer *buffer, int in_port,
- size_t max_len, int out_port)
+ size_t max_len, int out_port, bool ignore_no_fwd)
{
if (out_port != OFPP_CONTROLLER) {
- dp_output_port(dp, buffer, in_port, out_port);
+ dp_output_port(dp, buffer, in_port, out_port, ignore_no_fwd);
} else {
dp_output_control(dp, buffer, in_port, max_len, OFPR_ACTION);
}
static void
execute_actions(struct datapath *dp, struct buffer *buffer,
int in_port, const struct sw_flow_key *key,
- const struct ofp_action *actions, int n_actions)
+ const struct ofp_action *actions, int n_actions,
+ bool ignore_no_fwd)
{
/* Every output action needs a separate clone of 'buffer', but the common
* case is just a single output action, so that doing a clone and then
struct eth_header *eh = buffer->l2;
if (prev_port != -1) {
- do_output(dp, buffer_clone(buffer), in_port, max_len, prev_port);
+ do_output(dp, buffer_clone(buffer), in_port, max_len, prev_port,
+ ignore_no_fwd);
prev_port = -1;
}
}
}
if (prev_port != -1)
- do_output(dp, buffer, in_port, max_len, prev_port);
+ do_output(dp, buffer, in_port, max_len, prev_port, ignore_no_fwd);
else
buffer_delete(buffer);
}
flow_extract(buffer, ntohs(opo->in_port), &key.flow);
execute_actions(dp, buffer, ntohs(opo->in_port),
- &key, opo->actions, n_actions);
+ &key, opo->actions, n_actions, true);
return 0;
}
uint16_t in_port = ntohs(ofm->match.in_port);
flow_used(flow, buffer);
flow_extract(buffer, in_port, &key.flow);
- execute_actions(dp, buffer, in_port, &key, ofm->actions, n_actions);
+ execute_actions(dp, buffer, in_port, &key,
+ ofm->actions, n_actions, false);
} else {
error = -ESRCH;
}
include ../Make.vars
TESTS = test-list
-
-check_PROGRAMS = test-list
-
+noinst_PROGRAMS = test-list
test_list_SOURCES = test-list.c
test_list_LDADD = ../lib/libopenflow.a
TESTS += test-type-props
-check_PROGRAMS += test-type-props
+noinst_PROGRAMS += test-type-props
test_type_props_SOURCES = test-type-props.c
-noinst_PROGRAMS = test-dhcp-client
+noinst_PROGRAMS += test-dhcp-client
test_dhcp_client_SOURCES = test-dhcp-client.c
test_dhcp_client_LDADD = ../lib/libopenflow.a $(FAULT_LIBS)
+TESTS += test-stp.sh
+EXTRA_DIST = test-stp.sh
+noinst_PROGRAMS += test-stp
+
+test_stp_SOURCES = test-stp.c
+test_stp_LDADD = ../lib/libopenflow.a
+stp_files = \
+ test-stp-ieee802.1d-1998 \
+ test-stp-ieee802.1d-2004-fig17.4 \
+ test-stp-ieee802.1d-2004-fig17.6 \
+ test-stp-ieee802.1d-2004-fig17.7 \
+ test-stp-iol-op-1.1 \
+ test-stp-iol-op-1.4 \
+ test-stp-iol-op-3.1 \
+ test-stp-iol-op-3.3 \
+ test-stp-iol-io-1.1 \
+ test-stp-iol-io-1.2 \
+ test-stp-iol-io-1.4 \
+ test-stp-iol-io-1.5
+TESTS_ENVIRONMENT = stp_files='$(stp_files)'
+
+EXTRA_DIST += $(stp_files)
--- /dev/null
+# This is the STP example from IEEE 802.1D-1998.
+bridge 0 0x42 = a b
+bridge 1 0x97 = c:5 a d:5
+bridge 2 0x45 = b e
+bridge 3 0x57 = b:5 e:5
+bridge 4 0x83 = a:5 e:5
+run 256
+check 0 = root
+check 1 = F F:10 F
+check 2 = F:10 B
+check 3 = F:5 F
+check 4 = F:5 B
--- /dev/null
+# This is the STP example from IEEE 802.1D-2004 figures 17.4 and 17.5.
+bridge 0 0x111 = a b e c
+bridge 1 0x222 = a b d f
+bridge 2 0x333 = c d l j h g
+bridge 3 0x444 = e f n m k i
+bridge 4 0x555 = g i 0 0
+bridge 5 0x666 = h k 0 0
+bridge 6 0x777 = j m 0 0
+bridge 7 0x888 = l n 0 0
+run 256
+check 0 = root
+check 1 = F:10 B F F
+check 2 = F:10 B F F F F
+check 3 = F:10 B F F F F
+check 4 = F:20 B F F
+check 5 = F:20 B F F
+check 6 = F:20 B F F
+check 7 = F:20 B F F
+
+# Now connect two ports of bridge 7 to the same LAN.
+bridge 7 = l n o o
+# Same results except for bridge 7:
+run 256
+check 0 = root
+check 1 = F:10 B F F
+check 2 = F:10 B F F F F
+check 3 = F:10 B F F F F
+check 4 = F:20 B F F
+check 5 = F:20 B F F
+check 6 = F:20 B F F
+check 7 = F:20 B F B
--- /dev/null
+# This is the STP example from IEEE 802.1D-2004 figure 17.6.
+bridge 0 0x111 = a b l
+bridge 1 0x222 = b c d
+bridge 2 0x333 = d e f
+bridge 3 0x444 = f g h
+bridge 4 0x555 = j h i
+bridge 5 0x666 = l j k
+run 256
+check 0 = root
+check 1 = F:10 F F
+check 2 = F:20 F F
+check 3 = F:30 F B
+check 4 = F:20 F F
+check 5 = F:10 F F
--- /dev/null
+# This is the STP example from IEEE 802.1D-2004 figure 17.7.
+bridge 0 0xaa = b
+bridge 1 0x111 = a b d f h g e c
+bridge 2 0x222 = g h j l n m k i
+run 256
+check 0 = root
+check 1 = F F:10 F F F F F F
+check 2 = B F:20 F F F F F F
+
+# This is not the port priority change described in that figure,
+# but I don't understand what port priority change would cause
+# that change.
+bridge 2 = g X j l n m k i
+run 256
+check 0 = root
+check 1 = F F:10 F F F F F F
+check 2 = F:20 D F F F F F F
--- /dev/null
+# This test file approximates the following test from "Bridge
+# Functions Consortium Spanning Tree Interoperability Test Suite
+# Version 1.5":
+# STP.io.1.1: Link Failure
+bridge 0 0x111 = a b c
+bridge 1 0x222 = a b c
+run 256
+check 0 = root
+check 1 = F:10 B B
+bridge 1 = 0 _ _
+run 256
+check 0 = root
+check 1 = F F:10 B
+bridge 1 = X _ _
+run 256
+check 0 = root
+check 1 = D F:10 B
+bridge 1 = _ 0 _
+run 256
+check 0 = root
+check 1 = D F F:10
+bridge 1 = _ X _
+run 256
+check 0 = root
+check 1 = D D F:10
--- /dev/null
+# This test file approximates the following test from "Bridge
+# Functions Consortium Spanning Tree Interoperability Test Suite
+# Version 1.5":
+# STP.io.1.2: Repeated Network
+bridge 0 0x111 = a a
+bridge 1 0x222 = a a
+run 256
+check 0 = rootid:0x111 F B
+check 1 = rootid:0x111 F:10 B
+bridge 1 = a^0x90 _
+run 256
+check 0 = rootid:0x111 F B
+check 1 = rootid:0x111 B F:10
+
--- /dev/null
+# This test file approximates the following test from "Bridge
+# Functions Consortium Spanning Tree Interoperability Test Suite
+# Version 1.5":
+# STP.io.1.4: Network Initialization
+bridge 0 0x111 = a b c
+bridge 1 0x222 = b d e
+bridge 2 0x333 = a d f
+bridge 3 0x444 = c e f
+run 256
+check 0 = root
+check 1 = F:10 F F
+check 2 = F:10 B F
+check 3 = F:10 B B
--- /dev/null
+# This test file approximates the following test from "Bridge
+# Functions Consortium Spanning Tree Interoperability Test Suite
+# Version 1.5":
+# STP.io.1.5: Topology Change
+bridge 0 0x111 = a b d c
+bridge 1 0x222 = a b f e
+bridge 2 0x333 = c d g h
+bridge 3 0x444 = e f g h
+run 256
+check 0 = root
+check 1 = F:10 B F F
+check 2 = B F:10 F F
+check 3 = B F:20 B B
+bridge 1^0x7000
+run 256
+check 0 = F:10 B F F
+check 1 = root
+check 2 = B F:20 B B
+check 3 = B F:10 F F
+bridge 2^0x6000
+run 256
+check 0 = F F B F:10
+check 1 = F:20 B B B
+check 2 = root
+check 3 = F F F:10 B
+bridge 3^0x5000
+run 256
+check 0 = B B B F:20
+check 1 = F F B F:10
+check 2 = F F F:10 B
+check 3 = root
+bridge 0^0x4000
+bridge 1^0x4001
+bridge 2^0x4002
+bridge 3^0x4003
+run 256
+check 0 = root
+check 1 = F:10 B F F
+check 2 = B F:10 F F
+check 3 = B F:20 B B
--- /dev/null
+# This test file approximates the following tests from "Bridge
+# Functions Consortium Spanning Tree Protocol Operations Test Suite
+# Version 2.3":
+# Test STP.op.1.1 Root ID Initialized to Bridge ID
+# Test STP.op.1.2 Root Path Cost Initialized to Zero
+bridge 0 0x123 =
+check 0 = root
--- /dev/null
+# This test file approximates the following test from "Bridge
+# Functions Consortium Spanning Tree Protocol Operations Test Suite
+# Version 2.3":
+# Test STP.op.1.4 All Ports Initialized to Designated Ports
+bridge 0 0x123 = a b c d e f
+check 0 = Li Li Li Li Li Li
+run 256
+check 0 = F F F F F F
--- /dev/null
+# This test file approximates the following test from "Bridge
+# Functions Consortium Spanning Tree Protocol Operations Test Suite
+# Version 2.3":
+# Test STP.op.3.1 Root Bridge Selection: Root ID Values
+bridge 0 0x111 = a
+bridge 1 0x222 = a
+check 0 = rootid:0x111 Li
+check 1 = rootid:0x222 Li
+run 256
+check 0 = rootid:0x111 root
+check 1 = rootid:0x111 F:10
--- /dev/null
+# This test file approximates the following test from "Bridge
+# Functions Consortium Spanning Tree Protocol Operations Test Suite
+# Version 2.3":
+# Test STP.op.3.3 Root Bridge Selection: Bridge ID Values
+bridge 0 0x333^0x6000 = a
+bridge 1 0x222^0x7000 = b
+bridge 2 0x111 = a b
+run 256
+check 0 = rootid:0x333^0x6000 root
+check 1 = rootid:0x333^0x6000 F:20
+check 2 = rootid:0x333^0x6000 F:10 F
--- /dev/null
+# This test file approximates the following test from "Bridge
+# Functions Consortium Spanning Tree Protocol Operations Test Suite
+# Version 2.3":
+# Test STP.op.3.3 Root Bridge Selection: Bridge ID Values
+bridge 0 0x333^0x6000 = a
+bridge 1 0x222^0x7000 = b
+bridge 2 0x111 = a b
+run 256
+check 0 = rootid:0x333^0x6000 root
+check 1 = rootid:0x333^0x6000 F:20
+check 2 = rootid:0x333^0x6000 F:10 F
--- /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 "stp.h"
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include "packets.h"
+
+struct bpdu {
+ int port_no;
+ void *data;
+ size_t size;
+};
+
+struct bridge {
+ struct test_case *tc;
+ int id;
+ bool reached;
+
+ struct stp *stp;
+
+ struct lan *ports[STP_MAX_PORTS];
+ int n_ports;
+
+#define RXQ_SIZE 16
+ struct bpdu rxq[RXQ_SIZE];
+ int rxq_head, rxq_tail;
+};
+
+struct lan_conn {
+ struct bridge *bridge;
+ int port_no;
+};
+
+struct lan {
+ struct test_case *tc;
+ const char *name;
+ bool reached;
+ struct lan_conn conns[16];
+ int n_conns;
+};
+
+struct test_case {
+ struct bridge *bridges[16];
+ int n_bridges;
+ struct lan *lans[26];
+ int n_lans;
+};
+
+static const char *file_name;
+static int line_number;
+static char line[128];
+static char *pos, *token;
+static int n_warnings;
+
+static struct test_case *
+new_test_case(void)
+{
+ struct test_case *tc = xmalloc(sizeof *tc);
+ tc->n_bridges = 0;
+ tc->n_lans = 0;
+ return tc;
+}
+
+static void
+send_bpdu(const void *data, size_t size, int port_no, void *b_)
+{
+ struct bridge *b = b_;
+ struct lan *lan;
+ int i;
+
+ assert(port_no < b->n_ports);
+ lan = b->ports[port_no];
+ if (!lan) {
+ return;
+ }
+ for (i = 0; i < lan->n_conns; i++) {
+ struct lan_conn *conn = &lan->conns[i];
+ if (conn->bridge != b || conn->port_no != port_no) {
+ struct bridge *dst = conn->bridge;
+ struct bpdu *bpdu = &dst->rxq[dst->rxq_head++ % RXQ_SIZE];
+ assert(dst->rxq_head - dst->rxq_tail <= RXQ_SIZE);
+ bpdu->data = xmemdup(data, size);
+ bpdu->size = size;
+ bpdu->port_no = conn->port_no;
+ }
+ }
+}
+
+static struct bridge *
+new_bridge(struct test_case *tc, int id)
+{
+ struct bridge *b = xmalloc(sizeof *b);
+ char name[16];
+ b->tc = tc;
+ b->id = id;
+ snprintf(name, sizeof name, "stp%x", id);
+ b->stp = stp_create(name, id, send_bpdu, b);
+ assert(tc->n_bridges < ARRAY_SIZE(tc->bridges));
+ b->n_ports = 0;
+ b->rxq_head = b->rxq_tail = 0;
+ tc->bridges[tc->n_bridges++] = b;
+ return b;
+}
+
+static struct lan *
+new_lan(struct test_case *tc, const char *name)
+{
+ struct lan *lan = xmalloc(sizeof *lan);
+ lan->tc = tc;
+ lan->name = xstrdup(name);
+ lan->n_conns = 0;
+ assert(tc->n_lans < ARRAY_SIZE(tc->lans));
+ tc->lans[tc->n_lans++] = lan;
+ return lan;
+}
+
+static void
+reconnect_port(struct bridge *b, int port_no, struct lan *new_lan)
+{
+ struct lan *old_lan;
+ int j;
+
+ assert(port_no < b->n_ports);
+ old_lan = b->ports[port_no];
+ if (old_lan == new_lan) {
+ return;
+ }
+
+ /* Disconnect from old_lan. */
+ if (old_lan) {
+ for (j = 0; j < old_lan->n_conns; j++) {
+ struct lan_conn *c = &old_lan->conns[j];
+ if (c->bridge == b && c->port_no == port_no) {
+ memmove(c, c + 1, sizeof *c * (old_lan->n_conns - j - 1));
+ old_lan->n_conns--;
+ break;
+ }
+ }
+ }
+
+ /* Connect to new_lan. */
+ b->ports[port_no] = new_lan;
+ if (new_lan) {
+ int conn_no = new_lan->n_conns++;
+ assert(conn_no < ARRAY_SIZE(new_lan->conns));
+ new_lan->conns[conn_no].bridge = b;
+ new_lan->conns[conn_no].port_no = port_no;
+ }
+}
+
+static void
+new_port(struct bridge *b, struct lan *lan, int path_cost)
+{
+ int port_no = b->n_ports++;
+ struct stp_port *p = stp_get_port(b->stp, port_no);
+ assert(port_no < ARRAY_SIZE(b->ports));
+ b->ports[port_no] = NULL;
+ stp_port_set_path_cost(p, path_cost);
+ stp_port_enable(p);
+ reconnect_port(b, port_no, lan);
+}
+
+static void
+dump(struct test_case *tc)
+{
+ int i;
+
+ for (i = 0; i < tc->n_bridges; i++) {
+ struct bridge *b = tc->bridges[i];
+ struct stp *stp = b->stp;
+ int j;
+
+ printf("%s:", stp_get_name(stp));
+ if (stp_is_root_bridge(stp)) {
+ printf(" root");
+ }
+ printf("\n");
+ for (j = 0; j < b->n_ports; j++) {
+ struct stp_port *p = stp_get_port(stp, j);
+ enum stp_state state = stp_port_get_state(p);
+
+ printf("\tport %d", j);
+ if (b->ports[j]) {
+ printf(" (lan %s)", b->ports[j]->name);
+ } else {
+ printf(" (disconnected)");
+ }
+ printf(": %s", stp_state_name(state));
+ if (p == stp_get_root_port(stp)) {
+ printf(" (root port, root_path_cost=%u)", stp_get_root_path_cost(stp));
+ }
+ printf("\n");
+ }
+ }
+}
+
+static void dump_lan_tree(struct test_case *, struct lan *, int level);
+
+static void
+dump_bridge_tree(struct test_case *tc, struct bridge *b, int level)
+{
+ int i;
+
+ if (b->reached) {
+ return;
+ }
+ b->reached = true;
+ for (i = 0; i < level; i++) {
+ printf("\t");
+ }
+ printf("%s\n", stp_get_name(b->stp));
+ for (i = 0; i < b->n_ports; i++) {
+ struct lan *lan = b->ports[i];
+ struct stp_port *p = stp_get_port(b->stp, i);
+ if (stp_port_get_state(p) == STP_FORWARDING && lan) {
+ dump_lan_tree(tc, lan, level + 1);
+ }
+ }
+}
+
+static void
+dump_lan_tree(struct test_case *tc, struct lan *lan, int level)
+{
+ int i;
+
+ if (lan->reached) {
+ return;
+ }
+ lan->reached = true;
+ for (i = 0; i < level; i++) {
+ printf("\t");
+ }
+ printf("%s\n", lan->name);
+ for (i = 0; i < lan->n_conns; i++) {
+ struct bridge *b = lan->conns[i].bridge;
+ dump_bridge_tree(tc, b, level + 1);
+ }
+}
+
+static void
+tree(struct test_case *tc)
+{
+ int i;
+
+ for (i = 0; i < tc->n_bridges; i++) {
+ struct bridge *b = tc->bridges[i];
+ b->reached = false;
+ }
+ for (i = 0; i < tc->n_lans; i++) {
+ struct lan *lan = tc->lans[i];
+ lan->reached = false;
+ }
+ for (i = 0; i < tc->n_bridges; i++) {
+ struct bridge *b = tc->bridges[i];
+ struct stp *stp = b->stp;
+ if (stp_is_root_bridge(stp)) {
+ dump_bridge_tree(tc, b, 0);
+ }
+ }
+}
+
+static void
+simulate(struct test_case *tc, int granularity)
+{
+ int time;
+
+ for (time = 0; time < 256 * 180; time += granularity) {
+ int round_trips;
+ int i;
+
+ for (i = 0; i < tc->n_bridges; i++) {
+ stp_tick(tc->bridges[i]->stp, granularity);
+ }
+ for (round_trips = 0; round_trips < granularity; round_trips++) {
+ bool any = false;
+ for (i = 0; i < tc->n_bridges; i++) {
+ struct bridge *b = tc->bridges[i];
+ for (; b->rxq_tail != b->rxq_head; b->rxq_tail++) {
+ struct bpdu *bpdu = &b->rxq[b->rxq_tail % RXQ_SIZE];
+ stp_received_bpdu(stp_get_port(b->stp, bpdu->port_no),
+ bpdu->data, bpdu->size);
+ any = true;
+ }
+ }
+ if (!any) {
+ break;
+ }
+ }
+ }
+}
+
+static void
+err(const char *message, ...)
+ PRINTF_FORMAT(1, 2)
+ NO_RETURN;
+
+static void
+err(const char *message, ...)
+{
+ va_list args;
+
+ fprintf(stderr, "%s:%d:%td: ", file_name, line_number, pos - line);
+ va_start(args, message);
+ vfprintf(stderr, message, args);
+ va_end(args);
+ putc('\n', stderr);
+
+ exit(EXIT_FAILURE);
+}
+
+static void
+warn(const char *message, ...)
+ PRINTF_FORMAT(1, 2);
+
+static void
+warn(const char *message, ...)
+{
+ va_list args;
+
+ fprintf(stderr, "%s:%d: ", file_name, line_number);
+ va_start(args, message);
+ vfprintf(stderr, message, args);
+ va_end(args);
+ putc('\n', stderr);
+
+ n_warnings++;
+}
+
+static bool
+get_token(void)
+{
+ char *start;
+
+ while (isspace((unsigned char) *pos)) {
+ pos++;
+ }
+ if (*pos == '\0') {
+ token = NULL;
+ return false;
+ }
+
+ start = pos;
+ if (isalpha((unsigned char) *pos)) {
+ while (isalpha((unsigned char) *++pos)) {
+ continue;
+ }
+ } else if (isdigit((unsigned char) *pos)) {
+ if (*pos == '0' && (pos[1] == 'x' || pos[1] == 'X')) {
+ pos += 2;
+ while (isxdigit((unsigned char) *pos)) {
+ pos++;
+ }
+ } else {
+ while (isdigit((unsigned char) *++pos)) {
+ continue;
+ }
+ }
+ } else {
+ pos++;
+ }
+
+ free(token);
+ token = xmemdup0(start, pos - start);
+ return true;
+}
+
+static bool
+get_int(int *intp)
+{
+ char *save_pos = pos;
+ if (token && isdigit((unsigned char) *token)) {
+ *intp = strtol(token, NULL, 0);
+ get_token();
+ return true;
+ } else {
+ pos = save_pos;
+ return false;
+ }
+}
+
+static bool
+match(const char *want)
+{
+ if (token && !strcmp(want, token)) {
+ get_token();
+ return true;
+ } else {
+ return false;
+ }
+}
+
+static int
+must_get_int(void)
+{
+ int x;
+ if (!get_int(&x)) {
+ err("expected integer");
+ }
+ return x;
+}
+
+static void
+must_match(const char *want)
+{
+ if (!match(want)) {
+ err("expected \"%s\"", want);
+ }
+}
+
+int
+main(int argc, char *argv[])
+{
+ struct test_case *tc;
+ FILE *input_file;
+ int i;
+
+ if (argc != 2) {
+ fatal(0, "usage: test-stp INPUT.STP\n");
+ }
+ file_name = argv[1];
+
+ input_file = fopen(file_name, "r");
+ if (!input_file) {
+ fatal(errno, "error opening \"%s\"", file_name);
+ }
+
+ tc = new_test_case();
+ for (i = 0; i < 26; i++) {
+ char name[2];
+ name[0] = 'a' + i;
+ name[1] = '\0';
+ new_lan(tc, name);
+ }
+
+ for (line_number = 1; fgets(line, sizeof line, input_file);
+ line_number++)
+ {
+ char *newline, *hash;
+
+ newline = strchr(line, '\n');
+ if (newline) {
+ *newline = '\0';
+ }
+ hash = strchr(line, '#');
+ if (hash) {
+ *hash = '\0';
+ }
+
+ pos = line;
+ if (!get_token()) {
+ continue;
+ }
+ if (match("bridge")) {
+ struct bridge *bridge;
+ int bridge_no, port_no;
+
+ bridge_no = must_get_int();
+ if (bridge_no < tc->n_bridges) {
+ bridge = tc->bridges[bridge_no];
+ } else if (bridge_no == tc->n_bridges) {
+ bridge = new_bridge(tc, must_get_int());
+ } else {
+ err("bridges must be numbered consecutively from 0");
+ }
+ if (match("^")) {
+ stp_set_bridge_priority(bridge->stp, must_get_int());
+ }
+
+ if (match("=")) {
+ for (port_no = 0; port_no < STP_MAX_PORTS; port_no++) {
+ struct stp_port *p = stp_get_port(bridge->stp, port_no);
+ if (!token || match("X")) {
+ stp_port_disable(p);
+ } else if (match("_")) {
+ /* Nothing to do. */
+ } else {
+ struct lan *lan;
+ int path_cost;
+
+ if (!strcmp(token, "0")) {
+ lan = NULL;
+ } else if (strlen(token) == 1 && islower(*token)) {
+ lan = tc->lans[*token - 'a'];
+ } else {
+ err("%s is not a valid LAN name "
+ "(0 or a lowercase letter)", token);
+ }
+ get_token();
+
+ path_cost = match(":") ? must_get_int() : 10;
+ if (port_no < bridge->n_ports) {
+ stp_port_set_path_cost(p, path_cost);
+ stp_port_enable(p);
+ reconnect_port(bridge, port_no, lan);
+ } else if (port_no == bridge->n_ports) {
+ new_port(bridge, lan, path_cost);
+ } else {
+ err("ports must be numbered consecutively");
+ }
+ if (match("^")) {
+ stp_port_set_priority(p, must_get_int());
+ }
+ }
+ }
+ }
+ } else if (match("run")) {
+ simulate(tc, must_get_int());
+ } else if (match("dump")) {
+ dump(tc);
+ } else if (match("tree")) {
+ tree(tc);
+ } else if (match("check")) {
+ struct bridge *b;
+ struct stp *stp;
+ int bridge_no, port_no;
+
+ bridge_no = must_get_int();
+ if (bridge_no >= tc->n_bridges) {
+ err("no bridge numbered %d", bridge_no);
+ }
+ b = tc->bridges[bridge_no];
+ stp = b->stp;
+
+ must_match("=");
+
+ if (match("rootid")) {
+ uint64_t rootid;
+ must_match(":");
+ rootid = must_get_int();
+ if (match("^")) {
+ rootid |= (uint64_t) must_get_int() << 48;
+ } else {
+ rootid |= UINT64_C(0x8000) << 48;
+ }
+ if (stp_get_designated_root(stp) != rootid) {
+ warn("%s: root %"PRIx64", not %"PRIx64,
+ stp_get_name(stp), stp_get_designated_root(stp),
+ rootid);
+ }
+ }
+
+ if (match("root")) {
+ if (stp_get_root_path_cost(stp)) {
+ warn("%s: root path cost of root is %u but should be 0",
+ stp_get_name(stp), stp_get_root_path_cost(stp));
+ }
+ if (!stp_is_root_bridge(stp)) {
+ warn("%s: root is %"PRIx64", not %"PRIx64,
+ stp_get_name(stp),
+ stp_get_designated_root(stp), stp_get_bridge_id(stp));
+ }
+ for (port_no = 0; port_no < b->n_ports; port_no++) {
+ struct stp_port *p = stp_get_port(stp, port_no);
+ enum stp_state state = stp_port_get_state(p);
+ if (!(state & (STP_DISABLED | STP_FORWARDING))) {
+ warn("%s: root port %d in state %s",
+ stp_get_name(b->stp), port_no,
+ stp_state_name(state));
+ }
+ }
+ } else {
+ for (port_no = 0; port_no < STP_MAX_PORTS; port_no++) {
+ struct stp_port *p = stp_get_port(stp, port_no);
+ enum stp_state state;
+ if (token == NULL || match("D")) {
+ state = STP_DISABLED;
+ } else if (match("B")) {
+ state = STP_BLOCKING;
+ } else if (match("Li")) {
+ state = STP_LISTENING;
+ } else if (match("Le")) {
+ state = STP_LEARNING;
+ } else if (match("F")) {
+ state = STP_FORWARDING;
+ } else if (match("_")) {
+ continue;
+ } else {
+ err("unknown port state %s", token);
+ }
+ if (stp_port_get_state(p) != state) {
+ warn("%s port %d: state is %s but should be %s",
+ stp_get_name(stp), port_no,
+ stp_state_name(stp_port_get_state(p)),
+ stp_state_name(state));
+ }
+ if (state == STP_FORWARDING) {
+ struct stp_port *root_port = stp_get_root_port(stp);
+ if (match(":")) {
+ int root_path_cost = must_get_int();
+ if (p != root_port) {
+ warn("%s: port %d is not the root port",
+ stp_get_name(stp), port_no);
+ if (!root_port) {
+ warn("%s: (there is no root port)",
+ stp_get_name(stp));
+ } else {
+ warn("%s: (port %d is the root port)",
+ stp_get_name(stp),
+ stp_port_no(root_port));
+ }
+ } else if (root_path_cost
+ != stp_get_root_path_cost(stp)) {
+ warn("%s: root path cost is %u, should be %d",
+ stp_get_name(stp),
+ stp_get_root_path_cost(stp),
+ root_path_cost);
+ }
+ } else if (p == root_port) {
+ warn("%s: port %d is the root port but "
+ "not expected to be",
+ stp_get_name(stp), port_no);
+ }
+ }
+ }
+ }
+ if (n_warnings) {
+ exit(EXIT_FAILURE);
+ }
+ }
+ if (get_token()) {
+ err("trailing garbage on line");
+ }
+ }
+
+ return 0;
+}
--- /dev/null
+#! /bin/sh
+set -e
+progress=
+for d in ${stp_files}; do
+ echo "Testing $d..."
+ $SUPERVISOR ./test-stp ${srcdir}/$d
+done
projects / openvswitch / commitdiff