ip: add the missing offload check

[vpp.git] / src / vnet / ip / ip4_options.c

diff --git a/src/vnet/ip/ip4_options.c b/src/vnet/ip/ip4_options.c
index 1b5a787..6ef6b60 100644 (file)
--- a/src/vnet/ip/ip4_options.c
+++ b/src/vnet/ip/ip4_options.c
@@ -77,11 +77,18 @@ VLIB_NODE_FN (ip4_options_node) (vlib_main_t * vm,
          switch (options[0] & 0x7f)
            {
            case IP4_ROUTER_ALERT_OPTION:
+             /*
+              * check the option length
+              */
+             if (options[1] != 4)
+               break;
              /*
               * if it's an IGMP packet, pass up the local stack
               */
              if (IP_PROTOCOL_IGMP == ip4->protocol)
                {
+                 ip_lookup_set_buffer_fib_index (
+                   ip4_main.fib_index_by_sw_if_index, b);
                  next = IP4_OPTIONS_NEXT_LOCAL;
                }
              break;