ip: add support for buffer offload metadata in ip midchain

[vpp.git] / src / vnet / adj / rewrite.h

diff --git a/src/vnet/adj/rewrite.h b/src/vnet/adj/rewrite.h
index 9b83b5a..5cb90e4 100644 (file)
--- a/src/vnet/adj/rewrite.h
+++ b/src/vnet/adj/rewrite.h
@@ -55,10 +55,22 @@ typedef enum vnet_rewrite_flags_t_
    * This adjacency/interface has output features configured
    */
   VNET_REWRITE_HAS_FEATURES = (1 << 0),
+
+  /**
+   * this adj performs IP4 over IP4 fixup
+   */
+  VNET_REWRITE_FIXUP_IP4_O_4 = (1 << 1),
+
+  /**
+   * this adj performs the flow hash fixup
+   */
+  VNET_REWRITE_FIXUP_FLOW_HASH = (1 << 2),
 } __attribute__ ((packed)) vnet_rewrite_flags_t;
 
-/* *INDENT-OFF* */
-typedef CLIB_PACKED (struct {
+extern u8 *format_vnet_rewrite_flags (u8 *s, va_list *ap);
+
+typedef struct vnet_rewrite_header_t_
+{
   /* Interface to mark re-written packets with. */
   u32 sw_if_index;
 
@@ -83,8 +95,7 @@ typedef CLIB_PACKED (struct {
 
   /* Rewrite string starting at end and going backwards. */
   u8 data[0];
-}) vnet_rewrite_header_t;
-/* *INDENT-ON* */
+} __clib_packed vnet_rewrite_header_t;
 
 /**
  * At 16 bytes of rewrite herader we have enought space left for a IPv6
@@ -105,18 +116,27 @@ STATIC_ASSERT (sizeof (vnet_rewrite_header_t) <= 16,
       vnet_rewrite_declare(64 - 2*sizeof(int)) rw;
     } my_adjacency_t;
 */
-#define vnet_declare_rewrite(total_bytes)                              \
-struct {                                                               \
-  vnet_rewrite_header_t rewrite_header;                                \
-                                                                       \
-  u8 rewrite_data[(total_bytes) - sizeof (vnet_rewrite_header_t)];     \
-}
+#define VNET_DECLARE_REWRITE                         \
+  struct                                             \
+  {                                                  \
+    vnet_rewrite_header_t rewrite_header;            \
+                                                     \
+    u8 rewrite_data[(VNET_REWRITE_TOTAL_BYTES) -     \
+                    sizeof (vnet_rewrite_header_t)]; \
+  }
+
+typedef struct __rewrite_unused_t__
+{
+  VNET_DECLARE_REWRITE;
+} __rewrite_unused_t;
+
+STATIC_ASSERT_SIZEOF (__rewrite_unused_t, 128);
 
 always_inline void
 vnet_rewrite_clear_data_internal (vnet_rewrite_header_t * rw, int max_size)
 {
   /* Sanity check values carefully for this clib_memset operation */
-  ASSERT ((max_size > 0) && (max_size < VLIB_BUFFER_PRE_DATA_SIZE));
+  ASSERT ((max_size > 0) && (max_size < VNET_REWRITE_TOTAL_BYTES));
 
   rw->data_bytes = 0;
   clib_memset (rw->data, 0xfe, max_size);
@@ -127,7 +147,7 @@ vnet_rewrite_set_data_internal (vnet_rewrite_header_t * rw,
                                int max_size, void *data, int data_bytes)
 {
   /* Sanity check values carefully for this clib_memset operation */
-  ASSERT ((max_size > 0) && (max_size < VLIB_BUFFER_PRE_DATA_SIZE));
+  ASSERT ((max_size > 0) && (max_size < VNET_REWRITE_TOTAL_BYTES));
   ASSERT ((data_bytes >= 0) && (data_bytes < max_size));
 
   rw->data_bytes = data_bytes;
@@ -152,7 +172,7 @@ vnet_rewrite_get_data_internal (vnet_rewrite_header_t * rw, int max_size)
   vnet_rewrite_get_data_internal (&((rw).rewrite_header), sizeof ((rw).rewrite_data))
 
 always_inline void
-_vnet_rewrite_one_header (vnet_rewrite_header_t * h0,
+_vnet_rewrite_one_header (const vnet_rewrite_header_t * h0,
                          void *packet0, int most_likely_size)
 {
   /* 0xfefe => poisoned adjacency => crash */
@@ -170,8 +190,8 @@ _vnet_rewrite_one_header (vnet_rewrite_header_t * h0,
 }
 
 always_inline void
-_vnet_rewrite_two_headers (vnet_rewrite_header_t * h0,
-                          vnet_rewrite_header_t * h1,
+_vnet_rewrite_two_headers (const vnet_rewrite_header_t * h0,
+                          const vnet_rewrite_header_t * h1,
                           void *packet0, void *packet1, int most_likely_size)
 {
   /* 0xfefe => poisoned adjacency => crash */