MTU: IP fragmentation added to ip4-rewrite and ip6-rewrite

[vpp.git] / src / vnet / ip / ip4_forward.c

diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c
index 6d5f07b..3444eb8 100644 (file)
--- a/src/vnet/ip/ip4_forward.c
+++ b/src/vnet/ip/ip4_forward.c
@@ -39,6 +39,7 @@
 
 #include <vnet/vnet.h>
 #include <vnet/ip/ip.h>
+#include <vnet/ip/ip_frag.h>
 #include <vnet/ethernet/ethernet.h>    /* for ethernet_header_t */
 #include <vnet/ethernet/arp_packet.h>  /* for ethernet_arp_header_t */
 #include <vnet/ppp/ppp.h>
@@ -2013,6 +2014,8 @@ typedef enum
 {
   IP4_REWRITE_NEXT_DROP,
   IP4_REWRITE_NEXT_ICMP_ERROR,
+  IP4_REWRITE_NEXT_FRAGMENT,
+  IP4_REWRITE_N_NEXT           /* Last */
 } ip4_rewrite_next_t;
 
 /**
@@ -2042,8 +2045,10 @@ ip4_mtu_check (vlib_buffer_t * b, u16 packet_len,
        }
       else
        {
-         /* Add support for fragmentation here */
-         *next = IP4_REWRITE_NEXT_DROP;
+         /* IP fragmentation */
+         ip_frag_set_vnet_buffer (b, 0, adj_packet_bytes,
+                                  IP4_FRAG_NEXT_IP4_LOOKUP, 0);
+         *next = IP4_REWRITE_NEXT_FRAGMENT;
        }
     }
 }
@@ -2539,10 +2544,11 @@ VLIB_REGISTER_NODE (ip4_rewrite_node) = {
 
   .format_trace = format_ip4_rewrite_trace,
 
-  .n_next_nodes = 2,
+  .n_next_nodes = IP4_REWRITE_N_NEXT,
   .next_nodes = {
     [IP4_REWRITE_NEXT_DROP] = "ip4-drop",
     [IP4_REWRITE_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+    [IP4_REWRITE_NEXT_FRAGMENT] = "ip4-frag",
   },
 };
 VLIB_NODE_FUNCTION_MULTIARCH (ip4_rewrite_node, ip4_rewrite)