Don't truncate flooded packets at the amount sent up by the switch.

[openvswitch] / secchan / secchan.c

diff --git a/secchan/secchan.c b/secchan/secchan.c
index 80ba987018e4c9005a299d0713754d53a48b57fa..b21802c603f49587bc3fecc85b4678c66c692905 100644 (file)
--- a/secchan/secchan.c
+++ b/secchan/secchan.c
@@ -114,6 +114,10 @@ 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;
 
@@ -131,6 +135,7 @@ static bool fail_open_hook(struct relay *r);
 int
 main(int argc, char *argv[])
 {
+    struct rconn *local_rconn, *remote_rconn;
     struct vconn *listen_vconn;
     struct relay *controller_relay;
     const char *nl_name;
@@ -197,10 +202,18 @@ main(int argc, char *argv[])
 
     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;
 
@@ -367,6 +380,14 @@ relay_destroy(struct relay *r)
     free(r);
 }
 
+static void
+queue_tx(struct rconn *rc, struct buffer *b)
+{
+    if (rconn_force_send(rc, b)) {
+        buffer_delete(b);
+    }
+}
+
 static bool
 is_controller_mac(const uint8_t dl_addr[ETH_ADDR_LEN],
                   struct rconn *controller) 
@@ -425,7 +446,7 @@ local_hook(struct relay *r)
     struct ofp_packet_in *opi;
     struct ofp_header *oh;
     size_t pkt_ofs, pkt_len;
-    struct buffer pkt, *b;
+    struct buffer pkt;
     struct flow flow;
     uint16_t in_port, out_port;
 
@@ -469,21 +490,26 @@ local_hook(struct relay *r)
         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);
-        }
-    }
+        /* The output port is known, so add a new flow. */
+        queue_tx(rc, make_add_simple_flow(&flow, ntohl(opi->buffer_id),
+                                          out_port, max_idle));
 
-    /* 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);
+        /* If the switch didn't buffer the packet, we need to send a copy. */
+        if (ntohl(opi->buffer_id) == UINT32_MAX) {
+            queue_tx(rc, make_unbuffered_packet_out(&pkt, 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);
+        } else {
+            b = make_buffered_packet_out(ntohl(opi->buffer_id),
+                                         in_port, out_port);
         }
+        queue_tx(rc, b);
     }
     return true;
 }
@@ -539,11 +565,16 @@ fail_open_hook(struct relay *r)
 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'},
@@ -594,6 +625,15 @@ parse_options(int argc, char *argv[])
             }
             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;
@@ -647,12 +687,14 @@ usage(void)
            "                            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",