/* -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;
* fail-open mode. */
static int max_idle = 15;
+/* --max-backoff: Maximum interval between controller connection attempts, in
+ * seconds. */
+static int max_backoff = 15;
+
static void parse_options(int argc, char *argv[]);
static void usage(void) NO_RETURN;
int
main(int argc, char *argv[])
{
+ struct rconn *local_rconn, *remote_rconn;
struct vconn *listen_vconn;
- struct netdev *of_device;
struct relay *controller_relay;
const char *nl_name;
char of_name[16];
}
snprintf(of_name, sizeof of_name, "of%s", nl_name + 3);
- retval = netdev_open(of_name, &of_device);
+ retval = netdev_open(of_name, NETDEV_ETH_TYPE_NONE, &of_device);
if (!retval) {
enum netdev_flags flags;
retval = netdev_get_flags(of_device, &flags);
} else {
error(retval, "Could not get flags for %s device", of_name);
}
- netdev_close(of_device);
} else {
error(retval, "Could not open %s device", of_name);
}
daemonize();
- controller_relay = relay_create(rconn_new(argv[optind], 1, 0),
- rconn_new(argv[optind + 1], 1,
- probe_interval),
- false);
+ 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);
+ }
+
+ 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]);
+ }
+ controller_relay = relay_create(local_rconn, remote_rconn, false);
for (;;) {
struct relay *r, *n;
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)
{
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;
}
static void
parse_options(int argc, char *argv[])
{
- enum { OPT_INACTIVITY_PROBE = UCHAR_MAX + 1, OPT_MAX_IDLE };
+ enum {
+ OPT_INACTIVITY_PROBE = UCHAR_MAX + 1,
+ OPT_MAX_IDLE,
+ OPT_MAX_BACKOFF
+ };
static struct option long_options[] = {
{"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'},
}
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;
+ }
+ break;
+
case 'D':
set_detach();
break;
" open (default): act as learning switch\n"
" --inactivity-probe=SECS time between inactivity probes\n"
" --max-idle=SECS max idle for flows set up by secchan\n"
+ " --max-backoff=SECS max time between controller connection\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 configure logging levels\n"
+ " -v, --verbose=MODULE[:FACILITY[:LEVEL]] set logging levels\n"
" -v, --verbose set maximum verbosity level\n"
" -h, --help display this help message\n"
" -V, --version display version information\n",
projects / openvswitch / blobdiff