X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=inline;f=ofproto%2Fofproto.c;h=d773c91cf80d6942481680f5cdd059ff4128e960;hb=27cafc5fc0869236b8cd696eef535eca879a0949;hp=5c9ab9d31540779d617d6c8e7a55028dd325347f;hpb=1c0333b6baf58cb382d78b53305bfb06149793e2;p=openvswitch

diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
index 5c9ab9d3..d773c91c 100644
--- a/ofproto/ofproto.c
+++ b/ofproto/ofproto.c
@@ -390,6 +390,7 @@ ofproto_create(const char *datapath_name, const char *datapath_type,
     ofproto->frag_handling = OFPC_FRAG_NORMAL;
     hmap_init(&ofproto->ports);
     shash_init(&ofproto->port_by_name);
+    ofproto->max_ports = OFPP_MAX;
     ofproto->tables = NULL;
     ofproto->n_tables = 0;
     ofproto->connmgr = connmgr_create(ofproto, datapath_name, datapath_name);
@@ -422,6 +423,9 @@ ofproto_create(const char *datapath_name, const char *datapath_type,
     return 0;
 }
 
+/* Must be called (only) by an ofproto implementation in its constructor
+ * function.  See the large comment on 'construct' in struct ofproto_class for
+ * details. */
 void
 ofproto_init_tables(struct ofproto *ofproto, int n_tables)
 {
@@ -437,6 +441,24 @@ ofproto_init_tables(struct ofproto *ofproto, int n_tables)
     }
 }
 
+/* To be optionally called (only) by an ofproto implementation in its
+ * constructor function.  See the large comment on 'construct' in struct
+ * ofproto_class for details.
+ *
+ * Sets the maximum number of ports to 'max_ports'.  The ofproto generic layer
+ * will then ensure that actions passed into the ofproto implementation will
+ * not refer to OpenFlow ports numbered 'max_ports' or higher.  If this
+ * function is not called, there will be no such restriction.
+ *
+ * Reserved ports numbered OFPP_MAX and higher are special and not subject to
+ * the 'max_ports' restriction. */
+void
+ofproto_init_max_ports(struct ofproto *ofproto, uint16_t max_ports)
+{
+    assert(max_ports <= OFPP_MAX);
+    ofproto->max_ports = max_ports;
+}
+
 uint64_t
 ofproto_get_datapath_id(const struct ofproto *ofproto)
 {
@@ -2103,6 +2125,10 @@ handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
     if (error) {
         goto exit_free_ofpacts;
     }
+    if (po.in_port >= p->max_ports && po.in_port < OFPP_MAX) {
+        error = OFPERR_NXBRC_BAD_IN_PORT;
+        goto exit_free_ofpacts;
+    }
 
     /* Get payload. */
     if (po.buffer_id != UINT32_MAX) {
@@ -2115,10 +2141,13 @@ handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
         ofpbuf_use_const(payload, po.packet, po.packet_len);
     }
 
-    /* Send out packet. */
+    /* Verify actions against packet, then send packet if successful. */
     flow_extract(payload, 0, 0, po.in_port, &flow);
-    error = p->ofproto_class->packet_out(p, payload, &flow,
-                                         po.ofpacts, po.ofpacts_len);
+    error = ofpacts_check(po.ofpacts, po.ofpacts_len, &flow, p->max_ports);
+    if (!error) {
+        error = p->ofproto_class->packet_out(p, payload, &flow,
+                                             po.ofpacts, po.ofpacts_len);
+    }
     ofpbuf_delete(payload);
 
 exit_free_ofpacts:
@@ -3231,7 +3260,12 @@ handle_flow_mod(struct ofconn *ofconn, const struct ofp_header *oh)
          * dropped from OpenFlow in the near future.  There is no good error
          * code, so just state that the flow table is full. */
         error = OFPERR_OFPFMFC_ALL_TABLES_FULL;
-    } else {
+    }
+    if (!error) {
+        error = ofpacts_check(fm.ofpacts, fm.ofpacts_len,
+                              &fm.cr.flow, ofproto->max_ports);
+    }
+    if (!error) {
         error = handle_flow_mod__(ofconn_get_ofproto(ofconn), ofconn, &fm, oh);
     }
     if (error) {