MAP: Add check for well known ports.

[vpp.git] / src / plugins / map / ip4_map_t.c

diff --git a/src/plugins/map/ip4_map_t.c b/src/plugins/map/ip4_map_t.c
index c6b0912..a64b767 100644 (file)
--- a/src/plugins/map/ip4_map_t.c
+++ b/src/plugins/map/ip4_map_t.c
@@ -736,6 +736,14 @@ ip4_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
          ip4_map_t_classify (p0, d0, ip40, ip4_len0, &map_port0, &error0,
                              &next0);
 
+         /* Verify that port is not among the well-known ports */
+         if ((d0->psid_length > 0 && d0->psid_offset > 0)
+             && (clib_net_to_host_u16 (map_port0) <
+                 (0x1 << (16 - d0->psid_offset))))
+           {
+             error0 = MAP_ERROR_SEC_CHECK;
+           }
+
          //Add MAP-T pseudo header in front of the packet
          vlib_buffer_advance (p0, -sizeof (*pheader0));
          pheader0 = vlib_buffer_get_current (p0);