- /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+/* 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
* 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
* 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 <config.h>
+#include "secchan.h"
+#include <assert.h>
#include <errno.h>
#include <getopt.h>
-#include <inttypes.h>
#include <netinet/in.h>
-#include <poll.h>
#include <stdlib.h>
+#include <signal.h>
#include <string.h>
-#include <time.h>
-#include <unistd.h>
-#include "buffer.h"
#include "command-line.h"
#include "compiler.h"
#include "daemon.h"
+#include "dirs.h"
+#include "discovery.h"
+#include "executer.h"
+#include "fail-open.h"
#include "fault.h"
-#include "flow.h"
-#include "learning-switch.h"
+#include "in-band.h"
#include "list.h"
-#include "mac-learning.h"
-#include "netdev.h"
-#include "openflow.h"
+#include "ofpbuf.h"
+#include "openflow/openflow.h"
#include "packets.h"
+#include "port-watcher.h"
#include "poll-loop.h"
+#include "ratelimit.h"
#include "rconn.h"
+#ifdef SUPPORT_SNAT
+#include "snat.h"
+#endif
+#include "stp-secchan.h"
+#include "status.h"
+#include "timeval.h"
#include "util.h"
#include "vconn-ssl.h"
#include "vconn.h"
#include "vlog.h"
#define THIS_MODULE VLM_secchan
-#include "ofp-print.h"
-
-static const char *listen_vconn_name;
-
-struct half {
- struct rconn *rconn;
- struct buffer *rxbuf;
+struct hook {
+ const struct hook_class *class;
+ void *aux;
};
-/* Behavior when the connection to the controller fails. */
-enum fail_mode {
- FAIL_OPEN, /* Act as learning switch. */
- FAIL_CLOSED /* Drop all packets. */
+struct secchan {
+ struct hook *hooks;
+ size_t n_hooks, allocated_hooks;
};
-struct relay {
- struct list node;
-
-#define HALF_LOCAL 0
-#define HALF_REMOTE 1
- struct half halves[2];
-
- bool is_mgmt_conn;
- struct lswitch *lswitch;
-};
-
-static struct list relays = LIST_INITIALIZER(&relays);
-
-/* Enable the local port? */
-static int local_port;
-
-/* MAC address of local port. */
-static uint8_t local_mac[ETH_ADDR_LEN];
-
-/* MAC learning table for local port. */
-static struct mac_learning *local_ml;
-
-/* -f, --fail: Behavior when the connection to the controller fails. */
-static enum fail_mode fail_mode = FAIL_OPEN;
-
-/* The OpenFlow virtual network device ofX. */
-static struct netdev *of_device;
-
-/* --inactivity-probe: Number of seconds without receiving a message from the
- controller before sending an inactivity probe. */
-static int probe_interval = 15;
-
-/* --max-idle: Idle time to assign to flows created by learning switch when in
- * fail-open mode. */
-static int max_idle = 15;
-
-/* --max-backoff: Maximum interval between controller connection attempts, in
- * seconds. */
-static int max_backoff = 15;
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(60, 60);
-static void parse_options(int argc, char *argv[]);
+static void parse_options(int argc, char *argv[], struct settings *);
static void usage(void) NO_RETURN;
-static void new_management_connection(const char *nl_name, struct vconn *new_remote);
+static struct pvconn *open_passive_vconn(const char *name);
+static struct vconn *accept_vconn(struct pvconn *pvconn);
+
static struct relay *relay_create(struct rconn *local, struct rconn *remote,
bool is_mgmt_conn);
-static void relay_run(struct relay *);
+static struct relay *relay_accept(const struct settings *, struct pvconn *);
+static void relay_run(struct relay *, struct secchan *);
static void relay_wait(struct relay *);
static void relay_destroy(struct relay *);
-static bool local_hook(struct relay *r);
-static bool failing_open(struct relay *r);
-static bool fail_open_hook(struct relay *r);
-
int
main(int argc, char *argv[])
{
+ struct settings s;
+
+ struct list relays = LIST_INITIALIZER(&relays);
+
+ struct secchan secchan;
+
+ struct pvconn *monitor;
+
+ struct pvconn *listeners[MAX_MGMT];
+ size_t n_listeners;
+
struct rconn *local_rconn, *remote_rconn;
- struct vconn *listen_vconn;
struct relay *controller_relay;
- const char *nl_name;
- char of_name[16];
+ struct discovery *discovery;
+ struct switch_status *switch_status;
+ struct port_watcher *pw;
+ int i;
int retval;
set_program_name(argv[0]);
register_fault_handlers();
+ time_init();
vlog_init();
- parse_options(argc, argv);
+ parse_options(argc, argv, &s);
+ signal(SIGPIPE, SIG_IGN);
- if (argc - optind != 2) {
- fatal(0,
- "need exactly two non-option arguments; use --help for usage");
- }
- nl_name = argv[optind];
- if (strncmp(nl_name, "nl:", 3)
- || strlen(nl_name) < 4
- || nl_name[strspn(nl_name + 3, "0123456789") + 3]) {
- fatal(0, "%s: argument is not of the form \"nl:DP_IDX\"", nl_name);
- }
+ secchan.hooks = NULL;
+ secchan.n_hooks = 0;
+ secchan.allocated_hooks = 0;
- if (listen_vconn_name) {
- retval = vconn_open(listen_vconn_name, &listen_vconn);
- if (retval && retval != EAGAIN) {
- fatal(retval, "opening %s", listen_vconn_name);
- }
- if (!vconn_is_passive(listen_vconn)) {
- fatal(0, "%s is not a passive vconn", listen_vconn_name);
- }
- } else {
- listen_vconn = NULL;
+ /* Start listening for management and monitoring connections. */
+ n_listeners = 0;
+ for (i = 0; i < s.n_listeners; i++) {
+ listeners[n_listeners++] = open_passive_vconn(s.listener_names[i]);
}
+ monitor = s.monitor_name ? open_passive_vconn(s.monitor_name) : NULL;
- snprintf(of_name, sizeof of_name, "of%s", nl_name + 3);
- retval = netdev_open(of_name, NETDEV_ETH_TYPE_NONE, &of_device);
- if (!retval) {
- enum netdev_flags flags;
- retval = netdev_get_flags(of_device, &flags);
- if (!retval) {
- if (flags & NETDEV_UP) {
- struct in6_addr in6;
-
- local_port = true;
- memcpy(local_mac, netdev_get_etheraddr(of_device),
- ETH_ADDR_LEN);
- if (netdev_get_in6(of_device, &in6)) {
- VLOG_WARN("Ignoring IPv6 address on %s device: "
- "IPv6 not supported", of_name);
- }
- local_ml = mac_learning_create();
- }
- } else {
- error(retval, "Could not get flags for %s device", of_name);
- }
- } else {
- error(retval, "Could not open %s device", of_name);
- }
+ /* Initialize switch status hook. */
+ switch_status_start(&secchan, &s, &switch_status);
+ die_if_already_running();
+ daemonize();
+
+ /* Start listening for vlogconf requests. */
retval = vlog_server_listen(NULL, NULL);
if (retval) {
- fatal(retval, "Could not listen for vlog connections");
+ ofp_fatal(retval, "Could not listen for vlog connections");
}
- daemonize();
+ VLOG_WARN("OpenFlow reference implementation version %s", VERSION BUILDNR);
+ VLOG_WARN("OpenFlow protocol version 0x%02x", OFP_VERSION);
- local_rconn = rconn_create(1, 0, max_backoff);
- retval = rconn_connect(local_rconn, nl_name);
- if (retval == EAFNOSUPPORT) {
- fatal(0, "No support for %s vconn", nl_name);
+ /* Connect to datapath. */
+ if (strncmp(s.dp_name, "nl:", 3) && strncmp(s.dp_name, "unix:", 5)
+ && !s.controller_name) {
+ VLOG_WARN("Controller not specified and datapath is not nl: or "
+ "unix:. (Did you forget to specify the datapath?)");
}
-
- remote_rconn = rconn_create(1, probe_interval, max_backoff);
- retval = rconn_connect(remote_rconn, argv[optind + 1]);
- if (retval == EAFNOSUPPORT) {
- fatal(0, "No support for %s vconn", argv[optind + 1]);
+ local_rconn = rconn_create(0, s.max_backoff);
+ rconn_connect(local_rconn, s.dp_name);
+ switch_status_register_category(switch_status, "local",
+ rconn_status_cb, local_rconn);
+
+ /* Connect to controller. */
+ remote_rconn = rconn_create(s.probe_interval, s.max_backoff);
+ if (s.controller_name) {
+ retval = rconn_connect(remote_rconn, s.controller_name);
+ if (retval == EAFNOSUPPORT) {
+ ofp_fatal(0, "No support for %s vconn", s.controller_name);
+ }
}
+ switch_status_register_category(switch_status, "remote",
+ rconn_status_cb, remote_rconn);
+
+ /* Start relaying. */
controller_relay = relay_create(local_rconn, remote_rconn, false);
+ list_push_back(&relays, &controller_relay->node);
+
+ /* Set up hooks. */
+ port_watcher_start(&secchan, local_rconn, remote_rconn, &pw);
+ discovery = s.discovery ? discovery_init(&s, pw, switch_status) : NULL;
+#ifdef SUPPORT_SNAT
+ snat_start(&secchan, pw);
+#endif
+ if (s.enable_stp) {
+ stp_start(&secchan, &s, pw, local_rconn, remote_rconn);
+ }
+ if (s.in_band) {
+ in_band_start(&secchan, &s, switch_status, pw, remote_rconn);
+ }
+ if (s.fail_mode == FAIL_OPEN) {
+ fail_open_start(&secchan, &s, switch_status,
+ local_rconn, remote_rconn);
+ }
+ if (s.rate_limit) {
+ rate_limit_start(&secchan, &s, switch_status, remote_rconn);
+ }
+ if (s.command_acl[0]) {
+ executer_start(&secchan, &s);
+ }
+
for (;;) {
struct relay *r, *n;
+ size_t i;
/* Do work. */
LIST_FOR_EACH_SAFE (r, n, struct relay, node, &relays) {
- relay_run(r);
+ relay_run(r, &secchan);
}
- if (listen_vconn) {
+ for (i = 0; i < n_listeners; i++) {
for (;;) {
- struct vconn *new_remote;
- retval = vconn_accept(listen_vconn, &new_remote);
- if (retval) {
- if (retval != EAGAIN) {
- VLOG_WARN("accept failed (%s)", strerror(retval));
- }
+ struct relay *r = relay_accept(&s, listeners[i]);
+ if (!r) {
break;
}
- new_management_connection(nl_name, new_remote);
+ list_push_back(&relays, &r->node);
+ }
+ }
+ if (monitor) {
+ struct vconn *new = accept_vconn(monitor);
+ if (new) {
+ rconn_add_monitor(local_rconn, new);
+ }
+ }
+ for (i = 0; i < secchan.n_hooks; i++) {
+ if (secchan.hooks[i].class->periodic_cb) {
+ secchan.hooks[i].class->periodic_cb(secchan.hooks[i].aux);
+ }
+ }
+ if (s.discovery) {
+ char *controller_name;
+ if (rconn_is_connectivity_questionable(remote_rconn)) {
+ discovery_question_connectivity(discovery);
+ }
+ if (discovery_run(discovery, &controller_name)) {
+ if (controller_name) {
+ rconn_connect(remote_rconn, controller_name);
+ } else {
+ rconn_disconnect(remote_rconn);
+ }
}
}
- failing_open(controller_relay);
/* Wait for something to happen. */
LIST_FOR_EACH (r, struct relay, node, &relays) {
relay_wait(r);
}
- if (listen_vconn) {
- vconn_accept_wait(listen_vconn);
+ for (i = 0; i < n_listeners; i++) {
+ pvconn_wait(listeners[i]);
+ }
+ if (monitor) {
+ pvconn_wait(monitor);
+ }
+ for (i = 0; i < secchan.n_hooks; i++) {
+ if (secchan.hooks[i].class->wait_cb) {
+ secchan.hooks[i].class->wait_cb(secchan.hooks[i].aux);
+ }
+ }
+ if (discovery) {
+ discovery_wait(discovery);
}
poll_block();
}
return 0;
}
-static void
-new_management_connection(const char *nl_name, struct vconn *new_remote)
+static struct pvconn *
+open_passive_vconn(const char *name)
+{
+ struct pvconn *pvconn;
+ int retval;
+
+ retval = pvconn_open(name, &pvconn);
+ if (retval && retval != EAGAIN) {
+ ofp_fatal(retval, "opening %s", name);
+ }
+ return pvconn;
+}
+
+static struct vconn *
+accept_vconn(struct pvconn *pvconn)
{
- char *nl_name_without_subscription;
- struct vconn *new_local;
+ struct vconn *new;
+ int retval;
+
+ retval = pvconn_accept(pvconn, OFP_VERSION, &new);
+ if (retval && retval != EAGAIN) {
+ VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
+ }
+ return new;
+}
+
+void
+add_hook(struct secchan *secchan, const struct hook_class *class, void *aux)
+{
+ struct hook *hook;
+
+ if (secchan->n_hooks >= secchan->allocated_hooks) {
+ secchan->allocated_hooks = secchan->allocated_hooks * 2 + 1;
+ secchan->hooks = xrealloc(secchan->hooks,
+ (sizeof *secchan->hooks
+ * secchan->allocated_hooks));
+ }
+ hook = &secchan->hooks[secchan->n_hooks++];
+ hook->class = class;
+ hook->aux = aux;
+}
+
+struct ofp_packet_in *
+get_ofp_packet_in(struct relay *r)
+{
+ struct ofpbuf *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;
+}
+
+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. */
+
+static struct relay *
+relay_accept(const struct settings *s, struct pvconn *pvconn)
+{
+ struct vconn *new_remote, *new_local;
struct rconn *r1, *r2;
+ char *vconn_name;
+ int nl_index;
int retval;
- /* nl:123 or nl:123:1 opens a netlink connection to local datapath 123. We
- * only accept the former syntax in main().
- *
- * nl:123:0 opens a netlink connection to local datapath 123 without
- * obtaining a subscription for ofp_packet_in or ofp_flow_expired
- * messages.*/
- nl_name_without_subscription = xasprintf("%s:0", nl_name);
- retval = vconn_open(nl_name_without_subscription, &new_local);
+ new_remote = accept_vconn(pvconn);
+ if (!new_remote) {
+ return NULL;
+ }
+
+ if (sscanf(s->dp_name, "nl:%d", &nl_index) == 1) {
+ /* nl:123 or nl:123:1 opens a netlink connection to local datapath 123.
+ * nl:123:0 opens a netlink connection to local datapath 123 without
+ * obtaining a subscription for ofp_packet_in or ofp_flow_expired
+ * messages. That's what we want here; management connections should
+ * not receive those messages, at least by default. */
+ vconn_name = xasprintf("nl:%d:0", nl_index);
+ } else {
+ /* We don't have a way to specify not to subscribe to those messages
+ * for other transports. (That's a defect: really this should be in
+ * the OpenFlow protocol, not the Netlink transport). */
+ VLOG_WARN_RL(&rl, "new management connection will receive "
+ "asynchronous messages");
+ vconn_name = xstrdup(s->dp_name);
+ }
+
+ retval = vconn_open(vconn_name, OFP_VERSION, &new_local);
if (retval) {
- VLOG_ERR("could not connect to %s (%s)",
- nl_name_without_subscription, strerror(retval));
+ VLOG_ERR_RL(&rl, "could not connect to %s (%s)",
+ vconn_name, strerror(retval));
vconn_close(new_remote);
- free(nl_name_without_subscription);
- return;
+ free(vconn_name);
+ return NULL;
}
- /* Add it to the relay list. */
- r1 = rconn_new_from_vconn(nl_name_without_subscription, 1, new_local);
- r2 = rconn_new_from_vconn("passive", 1, new_remote);
- relay_create(r1, r2, true);
+ /* Create and return relay. */
+ r1 = rconn_create(0, 0);
+ rconn_connect_unreliably(r1, vconn_name, new_local);
+ free(vconn_name);
- free(nl_name_without_subscription);
+ r2 = rconn_create(0, 0);
+ rconn_connect_unreliably(r2, "passive", new_remote);
+
+ return relay_create(r1, r2, true);
}
static struct relay *
relay_create(struct rconn *local, struct rconn *remote, bool is_mgmt_conn)
{
- struct relay *r;
- int i;
-
- r = xmalloc(sizeof *r);
+ struct relay *r = xcalloc(1, sizeof *r);
r->halves[HALF_LOCAL].rconn = local;
r->halves[HALF_REMOTE].rconn = remote;
- for (i = 0; i < 2; i++) {
- r->halves[i].rxbuf = NULL;
- }
r->is_mgmt_conn = is_mgmt_conn;
- r->lswitch = NULL;
- list_push_back(&relays, &r->node);
return r;
}
+static bool
+call_local_packet_cbs(struct secchan *secchan, struct relay *r)
+{
+ const struct hook *h;
+ for (h = secchan->hooks; h < &secchan->hooks[secchan->n_hooks]; h++) {
+ bool (*cb)(struct relay *, void *aux) = h->class->local_packet_cb;
+ if (cb && (cb)(r, h->aux)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+static bool
+call_remote_packet_cbs(struct secchan *secchan, struct relay *r)
+{
+ const struct hook *h;
+ for (h = secchan->hooks; h < &secchan->hooks[secchan->n_hooks]; h++) {
+ bool (*cb)(struct relay *, void *aux) = h->class->remote_packet_cb;
+ if (cb && (cb)(r, h->aux)) {
+ return true;
+ }
+ }
+ return false;
+}
+
static void
-relay_run(struct relay *r)
+relay_run(struct relay *r, struct secchan *secchan)
{
int iteration;
int i;
if (!this->rxbuf) {
this->rxbuf = rconn_recv(this->rconn);
- if (this->rxbuf && !r->is_mgmt_conn && i == HALF_LOCAL
- && (local_hook(r) || fail_open_hook(r))) {
- buffer_delete(this->rxbuf);
- this->rxbuf = NULL;
+ if (this->rxbuf && (i == HALF_REMOTE || !r->is_mgmt_conn)) {
+ if (i == HALF_LOCAL
+ ? call_local_packet_cbs(secchan, r)
+ : call_remote_packet_cbs(secchan, r))
+ {
+ ofpbuf_delete(this->rxbuf);
+ this->rxbuf = NULL;
+ progress = true;
+ break;
+ }
}
}
- if (this->rxbuf) {
- int retval = rconn_send(peer->rconn, this->rxbuf);
+ if (this->rxbuf && !this->n_txq) {
+ int retval = rconn_send(peer->rconn, this->rxbuf,
+ &this->n_txq);
if (retval != EAGAIN) {
if (!retval) {
progress = true;
} else {
- buffer_delete(this->rxbuf);
+ ofpbuf_delete(this->rxbuf);
}
this->rxbuf = NULL;
}
}
}
- for (i = 0; i < 2; i++) {
- struct half *this = &r->halves[i];
- if (!rconn_is_alive(this->rconn)) {
- relay_destroy(r);
- return;
+ if (r->is_mgmt_conn) {
+ for (i = 0; i < 2; i++) {
+ struct half *this = &r->halves[i];
+ if (!rconn_is_alive(this->rconn)) {
+ relay_destroy(r);
+ return;
+ }
}
}
}
for (i = 0; i < 2; i++) {
struct half *this = &r->halves[i];
rconn_destroy(this->rconn);
- buffer_delete(this->rxbuf);
+ ofpbuf_delete(this->rxbuf);
}
free(r);
}
-
-static bool
-is_controller_mac(const uint8_t dl_addr[ETH_ADDR_LEN],
- struct rconn *controller)
-{
- static uint32_t ip, last_nonzero_ip;
- static uint8_t mac[ETH_ADDR_LEN], last_nonzero_mac[ETH_ADDR_LEN];
- static time_t next_refresh = 0;
-
- uint32_t last_ip = ip;
-
- time_t now = time(0);
-
- ip = rconn_get_ip(controller);
- if (last_ip != ip || !next_refresh || now >= next_refresh) {
- bool have_mac;
-
- /* Look up MAC address. */
- memset(mac, 0, sizeof mac);
- if (ip) {
- int retval = netdev_arp_lookup(of_device, ip, mac);
- if (retval) {
- VLOG_DBG("cannot look up controller hw address ("IP_FMT"): %s",
- IP_ARGS(&ip), strerror(retval));
- }
- }
- have_mac = !eth_addr_is_zero(mac);
-
- /* Log changes in IP, MAC addresses. */
- if (ip && ip != last_nonzero_ip) {
- VLOG_DBG("controller IP address changed from "IP_FMT
- " to "IP_FMT, IP_ARGS(&last_nonzero_ip), IP_ARGS(&ip));
- last_nonzero_ip = ip;
- }
- if (have_mac && memcmp(last_nonzero_mac, mac, ETH_ADDR_LEN)) {
- VLOG_DBG("controller MAC address changed from "ETH_ADDR_FMT" to "
- ETH_ADDR_FMT,
- ETH_ADDR_ARGS(last_nonzero_mac), ETH_ADDR_ARGS(mac));
- memcpy(last_nonzero_mac, mac, ETH_ADDR_LEN);
- }
-
- /* Schedule next refresh.
- *
- * If we have an IP address but not a MAC address, then refresh
- * quickly, since we probably will get a MAC address soon (via ARP).
- * Otherwise, we can afford to wait a little while. */
- next_refresh = now + (!ip || have_mac ? 10 : 1);
- }
- return !eth_addr_is_zero(mac) && eth_addr_equals(mac, dl_addr);
-}
-
-static bool
-local_hook(struct relay *r)
-{
- 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, *b;
- struct flow flow;
- uint16_t in_port, out_port;
-
- if (!local_port) {
- return false;
- }
-
- oh = msg->data;
- if (oh->type != OFPT_PACKET_IN) {
- return false;
- }
- if (msg->size < offsetof (struct ofp_packet_in, data)) {
- VLOG_WARN("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) {
- out_port = mac_learning_lookup(local_ml, flow.dl_dst);
- } else if (eth_addr_equals(flow.dl_dst, local_mac)) {
- out_port = OFPP_LOCAL;
- if (mac_learning_learn(local_ml, flow.dl_src, in_port)) {
- VLOG_DBG("learned that "ETH_ADDR_FMT" is on port %"PRIu16,
- ETH_ADDR_ARGS(flow.dl_src), in_port);
- }
- } else if (flow.dl_type == htons(ETH_TYPE_ARP)
- && eth_addr_is_broadcast(flow.dl_dst)
- && is_controller_mac(flow.dl_src,
- r->halves[HALF_REMOTE].rconn)) {
- out_port = OFPP_FLOOD;
- } else {
- return false;
- }
-
- /* Add new flow. */
- if (out_port != OFPP_FLOOD) {
- b = make_add_simple_flow(&flow, ntohl(opi->buffer_id), out_port,
- max_idle);
- if (rconn_force_send(rc, b)) {
- buffer_delete(b);
- }
- }
-
- /* If the switch didn't buffer the packet, we need to send a copy. */
- if (out_port == OFPP_FLOOD || ntohl(opi->buffer_id) == UINT32_MAX) {
- b = make_unbuffered_packet_out(&pkt, in_port, out_port);
- if (rconn_force_send(rc, b)) {
- buffer_delete(b);
- }
- }
- return true;
-}
-
-/* Causess 'r' to enter or leave fail-open mode, if appropriate. Returns true
- * if 'r' is in fail-open fail, false otherwise. */
-static bool
-failing_open(struct relay *r)
-{
- struct rconn *local = r->halves[HALF_LOCAL].rconn;
- struct rconn *remote = r->halves[HALF_REMOTE].rconn;
- int disconnected_duration;
-
- if (fail_mode == FAIL_CLOSED) {
- /* We fail closed, so there's never anything to do. */
- return false;
- }
-
- disconnected_duration = rconn_disconnected_duration(remote);
- if (disconnected_duration < probe_interval * 3) {
- /* It's not time to fail open yet. */
- if (r->lswitch && rconn_is_connected(remote)) {
- /* We're connected, so drop the learning switch. */
- VLOG_WARN("No longer in fail-open mode");
- lswitch_destroy(r->lswitch);
- r->lswitch = NULL;
- }
- return false;
- }
-
- if (!r->lswitch) {
- VLOG_WARN("Could not connect to controller for %d seconds, "
- "failing open", disconnected_duration);
- r->lswitch = lswitch_create(local, true, max_idle);
- }
- return true;
-}
-
-static bool
-fail_open_hook(struct relay *r)
-{
- if (!failing_open(r)) {
- return false;
- } else {
- struct buffer *msg = r->halves[HALF_LOCAL].rxbuf;
- struct rconn *local = r->halves[HALF_LOCAL].rconn;
- lswitch_process_packet(r->lswitch, local, msg);
- rconn_run(local);
- return true;
- }
-}
+\f
+/* User interface. */
static void
-parse_options(int argc, char *argv[])
+parse_options(int argc, char *argv[], struct settings *s)
{
enum {
- OPT_INACTIVITY_PROBE = UCHAR_MAX + 1,
+ OPT_ACCEPT_VCONN = UCHAR_MAX + 1,
+ OPT_NO_RESOLV_CONF,
+ OPT_INACTIVITY_PROBE,
OPT_MAX_IDLE,
- OPT_MAX_BACKOFF
+ OPT_MAX_BACKOFF,
+ OPT_RATE_LIMIT,
+ OPT_BURST_LIMIT,
+ OPT_BOOTSTRAP_CA_CERT,
+ OPT_STP,
+ OPT_NO_STP,
+ OPT_OUT_OF_BAND,
+ OPT_IN_BAND,
+ OPT_COMMAND_ACL,
+ OPT_COMMAND_DIR,
+ VLOG_OPTION_ENUMS
};
static struct option long_options[] = {
- {"fail", required_argument, 0, 'f'},
+ {"accept-vconn", required_argument, 0, OPT_ACCEPT_VCONN},
+ {"no-resolv-conf", no_argument, 0, OPT_NO_RESOLV_CONF},
+ {"fail", required_argument, 0, 'F'},
{"inactivity-probe", required_argument, 0, OPT_INACTIVITY_PROBE},
{"max-idle", required_argument, 0, OPT_MAX_IDLE},
{"max-backoff", required_argument, 0, OPT_MAX_BACKOFF},
{"listen", required_argument, 0, 'l'},
- {"detach", no_argument, 0, 'D'},
- {"pidfile", optional_argument, 0, 'P'},
+ {"monitor", required_argument, 0, 'm'},
+ {"rate-limit", optional_argument, 0, OPT_RATE_LIMIT},
+ {"burst-limit", required_argument, 0, OPT_BURST_LIMIT},
+ {"stp", no_argument, 0, OPT_STP},
+ {"no-stp", no_argument, 0, OPT_NO_STP},
+ {"out-of-band", no_argument, 0, OPT_OUT_OF_BAND},
+ {"in-band", no_argument, 0, OPT_IN_BAND},
+ {"command-acl", required_argument, 0, OPT_COMMAND_ACL},
+ {"command-dir", required_argument, 0, OPT_COMMAND_DIR},
{"verbose", optional_argument, 0, 'v'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
+ DAEMON_LONG_OPTIONS,
+ VLOG_LONG_OPTIONS,
+#ifdef HAVE_OPENSSL
VCONN_SSL_LONG_OPTIONS
+ {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
+#endif
{0, 0, 0, 0},
};
char *short_options = long_options_to_short_options(long_options);
-
+ char *accept_re = NULL;
+ int retval;
+
+ /* Set defaults that we can figure out before parsing options. */
+ s->n_listeners = 0;
+ s->monitor_name = NULL;
+ s->fail_mode = FAIL_OPEN;
+ s->max_idle = 15;
+ s->probe_interval = 15;
+ s->max_backoff = 15;
+ s->update_resolv_conf = true;
+ s->rate_limit = 0;
+ s->burst_limit = 0;
+ s->enable_stp = false;
+ s->in_band = true;
+ s->command_acl = "";
+ s->command_dir = xasprintf("%s/commands", ofp_pkgdatadir);
for (;;) {
int c;
}
switch (c) {
- case 'f':
+ case OPT_ACCEPT_VCONN:
+ accept_re = optarg[0] == '^' ? optarg : xasprintf("^%s", optarg);
+ break;
+
+ case OPT_NO_RESOLV_CONF:
+ s->update_resolv_conf = false;
+ break;
+
+ case 'F':
if (!strcmp(optarg, "open")) {
- fail_mode = FAIL_OPEN;
+ s->fail_mode = FAIL_OPEN;
} else if (!strcmp(optarg, "closed")) {
- fail_mode = FAIL_CLOSED;
+ s->fail_mode = FAIL_CLOSED;
} else {
- fatal(0,
- "-f or --fail argument must be \"open\" or \"closed\"");
+ ofp_fatal(0, "-f or --fail argument must be \"open\" "
+ "or \"closed\"");
}
break;
case OPT_INACTIVITY_PROBE:
- probe_interval = atoi(optarg);
- if (probe_interval < 5) {
- fatal(0, "--inactivity-probe argument must be at least 5");
+ s->probe_interval = atoi(optarg);
+ if (s->probe_interval < 5) {
+ ofp_fatal(0, "--inactivity-probe argument must be at least 5");
}
break;
case OPT_MAX_IDLE:
if (!strcmp(optarg, "permanent")) {
- max_idle = OFP_FLOW_PERMANENT;
+ s->max_idle = OFP_FLOW_PERMANENT;
} else {
- max_idle = atoi(optarg);
- if (max_idle < 1 || max_idle > 65535) {
- fatal(0, "--max-idle argument must be between 1 and "
- "65535 or the word 'permanent'");
+ s->max_idle = atoi(optarg);
+ if (s->max_idle < 1 || s->max_idle > 65535) {
+ ofp_fatal(0, "--max-idle argument must be between 1 and "
+ "65535 or the word 'permanent'");
}
}
break;
case OPT_MAX_BACKOFF:
- max_backoff = atoi(optarg);
- if (max_backoff < 1) {
- fatal(0, "--max-backoff argument must be at least 1");
- } else if (max_backoff > 3600) {
- max_backoff = 3600;
+ s->max_backoff = atoi(optarg);
+ if (s->max_backoff < 1) {
+ ofp_fatal(0, "--max-backoff argument must be at least 1");
+ } else if (s->max_backoff > 3600) {
+ s->max_backoff = 3600;
}
break;
- case 'D':
- set_detach();
+ case OPT_RATE_LIMIT:
+ if (optarg) {
+ s->rate_limit = atoi(optarg);
+ if (s->rate_limit < 1) {
+ ofp_fatal(0, "--rate-limit argument must be at least 1");
+ }
+ } else {
+ s->rate_limit = 1000;
+ }
break;
- case 'P':
- set_pidfile(optarg ? optarg : "secchan.pid");
+ case OPT_BURST_LIMIT:
+ s->burst_limit = atoi(optarg);
+ if (s->burst_limit < 1) {
+ ofp_fatal(0, "--burst-limit argument must be at least 1");
+ }
+ break;
+
+ case OPT_STP:
+ s->enable_stp = true;
+ break;
+
+ case OPT_NO_STP:
+ s->enable_stp = false;
+ break;
+
+ case OPT_OUT_OF_BAND:
+ s->in_band = false;
+ break;
+
+ case OPT_IN_BAND:
+ s->in_band = true;
+ break;
+
+ case OPT_COMMAND_ACL:
+ s->command_acl = (s->command_acl[0]
+ ? xasprintf("%s,%s", s->command_acl, optarg)
+ : optarg);
+ break;
+
+ case OPT_COMMAND_DIR:
+ s->command_dir = optarg;
break;
case 'l':
- if (listen_vconn_name) {
- fatal(0, "-l or --listen may be only specified once");
+ if (s->n_listeners >= MAX_MGMT) {
+ ofp_fatal(0,
+ "-l or --listen may be specified at most %d times",
+ MAX_MGMT);
}
- listen_vconn_name = optarg;
+ s->listener_names[s->n_listeners++] = optarg;
+ break;
+
+ case 'm':
+ if (s->monitor_name) {
+ ofp_fatal(0, "-m or --monitor may only be specified once");
+ }
+ s->monitor_name = optarg;
break;
case 'h':
usage();
case 'V':
- printf("%s "VERSION" compiled "__DATE__" "__TIME__"\n", argv[0]);
+ printf("%s %s compiled "__DATE__" "__TIME__"\n",
+ program_name, VERSION BUILDNR);
exit(EXIT_SUCCESS);
- case 'v':
- vlog_set_verbosity(optarg);
- break;
+ DAEMON_OPTION_HANDLERS
+
+ VLOG_OPTION_HANDLERS
+#ifdef HAVE_OPENSSL
VCONN_SSL_OPTION_HANDLERS
+ case OPT_BOOTSTRAP_CA_CERT:
+ vconn_ssl_set_ca_cert_file(optarg, true);
+ break;
+#endif
+
case '?':
exit(EXIT_FAILURE);
}
}
free(short_options);
+
+ argc -= optind;
+ argv += optind;
+ if (argc < 1 || argc > 2) {
+ ofp_fatal(0, "need one or two non-option arguments; "
+ "use --help for usage");
+ }
+
+ /* Local and remote vconns. */
+ s->dp_name = argv[0];
+ s->controller_name = argc > 1 ? xstrdup(argv[1]) : NULL;
+
+ /* Set accept_controller_regex. */
+ if (!accept_re) {
+ accept_re = vconn_ssl_is_configured() ? "^ssl:.*" : ".*";
+ }
+ retval = regcomp(&s->accept_controller_regex, accept_re,
+ REG_NOSUB | REG_EXTENDED);
+ if (retval) {
+ size_t length = regerror(retval, &s->accept_controller_regex, NULL, 0);
+ char *buffer = xmalloc(length);
+ regerror(retval, &s->accept_controller_regex, buffer, length);
+ ofp_fatal(0, "%s: %s", accept_re, buffer);
+ }
+ s->accept_controller_re = accept_re;
+
+ /* Mode of operation. */
+ s->discovery = s->controller_name == NULL;
+ if (s->discovery && !s->in_band) {
+ ofp_fatal(0, "Cannot perform discovery with out-of-band control");
+ }
+
+ /* Rate limiting. */
+ if (s->rate_limit) {
+ if (s->rate_limit < 100) {
+ VLOG_WARN("Rate limit set to unusually low value %d",
+ s->rate_limit);
+ }
+ if (!s->burst_limit) {
+ s->burst_limit = s->rate_limit / 4;
+ }
+ s->burst_limit = MAX(s->burst_limit, 1);
+ s->burst_limit = MIN(s->burst_limit, INT_MAX / 1000);
+ }
}
static void
usage(void)
{
printf("%s: secure channel, a relay for OpenFlow messages.\n"
- "usage: %s [OPTIONS] nl:DP_IDX CONTROLLER\n"
- "where nl:DP_IDX is a datapath that has been added with dpctl\n"
- "and CONTROLLER is an active OpenFlow connection method.\n",
+ "usage: %s [OPTIONS] nl:DP_IDX [CONTROLLER]\n"
+ "where nl:DP_IDX is a datapath that has been added with dpctl.\n"
+ "CONTROLLER is an active OpenFlow connection method; if it is\n"
+ "omitted, then secchan performs controller discovery.\n",
program_name, program_name);
- vconn_usage(true, true);
- printf("\nNetworking options:\n"
- " -f, --fail=open|closed when controller connection fails:\n"
+ vconn_usage(true, true, true);
+ printf("\nController discovery options:\n"
+ " --accept-vconn=REGEX accept matching discovered controllers\n"
+ " --no-resolv-conf do not update /etc/resolv.conf\n"
+ "\nNetworking options:\n"
+ " -F, --fail=open|closed when controller connection fails:\n"
" closed: drop all packets\n"
" open (default): act as learning switch\n"
" --inactivity-probe=SECS time between inactivity probes\n"
" attempts (default: 15 seconds)\n"
" -l, --listen=METHOD allow management connections on METHOD\n"
" (a passive OpenFlow connection method)\n"
- "\nOther options:\n"
- " -D, --detach run in background as daemon\n"
- " -P, --pidfile[=FILE] create pidfile (default: %s/secchan.pid)\n"
- " -v, --verbose=MODULE[:FACILITY[:LEVEL]] set logging levels\n"
- " -v, --verbose set maximum verbosity level\n"
+ " -m, --monitor=METHOD copy traffic to/from kernel to METHOD\n"
+ " (a passive OpenFlow connection method)\n"
+ " --out-of-band controller connection is out-of-band\n"
+ " --stp enable 802.1D Spanning Tree Protocol\n"
+ " --no-stp disable 802.1D Spanning Tree Protocol\n"
+ "\nRate-limiting of \"packet-in\" messages to the controller:\n"
+ " --rate-limit[=PACKETS] max rate, in packets/s (default: 1000)\n"
+ " --burst-limit=BURST limit on packet credit for idle time\n"
+ "\nRemote command execution options:\n"
+ " --command-acl=[!]GLOB[,[!]GLOB...] set allowed/denied commands\n"
+ " --command-dir=DIR set command dir (default: %s/commands)\n",
+ ofp_pkgdatadir);
+ daemon_usage();
+ vlog_usage();
+ printf("\nOther options:\n"
" -h, --help display this help message\n"
- " -V, --version display version information\n",
- RUNDIR);
+ " -V, --version display version information\n");
exit(EXIT_SUCCESS);
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff