IPv4/6 reassembly

[vpp.git] / src / vnet / buffer.h

diff --git a/src/vnet/buffer.h b/src/vnet/buffer.h
index 7567b87..5d7273a 100644 (file)
--- a/src/vnet/buffer.h
+++ b/src/vnet/buffer.h
@@ -42,38 +42,64 @@
 
 #include <vlib/vlib.h>
 
+/**
+ * Flags that are set in the high order bits of ((vlib_buffer*)b)->flags
+ */
 #define foreach_vnet_buffer_field \
-  _( 1, L4_CHECKSUM_COMPUTED)                          \
-  _( 2, L4_CHECKSUM_CORRECT)                           \
-  _( 3, VLAN_2_DEEP)                                   \
-  _( 4, VLAN_1_DEEP)                                   \
-  _( 8, SPAN_CLONE)                                    \
-  _( 6, HANDOFF_NEXT_VALID)                            \
-  _( 7, LOCALLY_ORIGINATED)                            \
-  _( 8, IS_IP4)                                                \
-  _( 9, IS_IP6)                                                \
-  _(10, OFFLOAD_IP_CKSUM)                              \
-  _(11, OFFLOAD_TCP_CKSUM)                             \
-  _(12, OFFLOAD_UDP_CKSUM)                              \
-  _(13, IS_NATED)
+  _( 1, L4_CHECKSUM_COMPUTED, "l4-cksum-computed")     \
+  _( 2, L4_CHECKSUM_CORRECT, "l4-cksum-correct")       \
+  _( 3, VLAN_2_DEEP, "vlan-2-deep")                    \
+  _( 4, VLAN_1_DEEP, "vlan-1-deep")                    \
+  _( 5, SPAN_CLONE, "span-clone")                      \
+  _( 6, HANDOFF_NEXT_VALID, "handoff-next-valid")      \
+  _( 7, LOCALLY_ORIGINATED, "local")                   \
+  _( 8, IS_IP4, "ip4")                                 \
+  _( 9, IS_IP6, "ip6")                                 \
+  _(10, OFFLOAD_IP_CKSUM, "offload-ip-cksum")          \
+  _(11, OFFLOAD_TCP_CKSUM, "offload-tcp-cksum")                \
+  _(12, OFFLOAD_UDP_CKSUM, "offload-udp-cksum")                \
+  _(13, IS_NATED, "nated")                             \
+  _(14, L2_HDR_OFFSET_VALID, 0)                                \
+  _(15, L3_HDR_OFFSET_VALID, 0)                                \
+  _(16, L4_HDR_OFFSET_VALID, 0)
 
 #define VNET_BUFFER_FLAGS_VLAN_BITS \
   (VNET_BUFFER_F_VLAN_1_DEEP | VNET_BUFFER_F_VLAN_2_DEEP)
 
 enum
 {
-#define _(bit, name) VNET_BUFFER_F_##name  = (1 << LOG2_VLIB_BUFFER_FLAG_USER(bit)),
+#define _(bit, name, v) VNET_BUFFER_F_##name  = (1 << LOG2_VLIB_BUFFER_FLAG_USER(bit)),
   foreach_vnet_buffer_field
 #undef _
 };
 
 enum
 {
-#define _(bit, name) VNET_BUFFER_F_LOG2_##name  = LOG2_VLIB_BUFFER_FLAG_USER(bit),
+#define _(bit, name, v) VNET_BUFFER_F_LOG2_##name  = LOG2_VLIB_BUFFER_FLAG_USER(bit),
   foreach_vnet_buffer_field
 #undef _
 };
 
+/**
+ * @brief Flags set in ((vnet_buffer(b)->flags
+ */
+#define foreach_vnet_opaque_flag \
+  _( 1, IS_DVR, "DVR-processed")
+
+enum
+{
+#define _(bit, name, v) VNET_OPAQUE_F_##name  = (1 << bit),
+  foreach_vnet_opaque_flag
+#undef _
+};
+
+enum
+{
+#define _(bit, name, v) VNET_OPAQUE_F_LOG2_##name  = bit,
+  foreach_vnet_opaque_flag
+#undef _
+};
+
 
 #define foreach_buffer_opaque_union_subtype     \
 _(ip)                                           \
@@ -88,6 +114,7 @@ _(ipsec)                                     \
 _(map)                                         \
 _(map_t)                                       \
 _(ip_frag)                                     \
+_(mpls)                                                \
 _(tcp)
 
 /*
@@ -107,6 +134,7 @@ typedef struct
   i16 l2_hdr_offset;
   i16 l3_hdr_offset;
   i16 l4_hdr_offset;
+  u16 flags;
 
   union
   {
@@ -149,6 +177,18 @@ typedef struct
          u8 code;
          u32 data;
        } icmp;
+
+       /* reassembly */
+       struct
+       {
+         u16 fragment_first;
+         u16 fragment_last;
+         u16 range_first;
+         u16 range_last;
+         u32 next_range_bi;
+         u16 ip6_frag_hdr_offset;
+         u16 estimated_mtu;
+       } reass;
       };
 
     } ip;
@@ -163,6 +203,15 @@ typedef struct
       u8 ttl;
       u8 exp;
       u8 first;
+      /*
+       * BIER - the nubmer of bytes in the header.
+       *  the len field inthe header is not authoritative. It's the
+       * value in the table that counts.
+       */
+      struct
+      {
+       u8 n_bytes;
+      } bier;
     } mpls;
 
     /* ip4-in-ip6 softwire termination, only valid there */
@@ -252,6 +301,7 @@ typedef struct
     /* IP Fragmentation */
     struct
     {
+      u32 pad[2];              /* do not overlay w/ ip.adj_index[0,1] */
       u16 header_offset;
       u16 mtu;
       u8 next_index;
@@ -292,6 +342,19 @@ typedef struct
       u8 flags;
     } tcp;
 
+    /* SCTP */
+    struct
+    {
+      u32 connection_index;
+      u16 sid; /**< Stream ID */
+      u16 ssn; /**< Stream Sequence Number */
+      u32 tsn; /**< Transmission Sequence Number */
+      u16 hdr_offset;          /**< offset relative to ip hdr */
+      u16 data_offset;         /**< offset relative to ip hdr */
+      u16 data_len;            /**< data len */
+      u8 flags;
+    } sctp;
+
     /* SNAT */
     struct
     {
@@ -317,10 +380,28 @@ typedef struct
 {
   union
   {
+#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
+    /* buffer trajectory tracing */
+    struct
+    {
+      u16 *trajectory_trace;
+    };
+#endif
+    u32 unused[12];
   };
 } vnet_buffer_opaque2_t;
 
+#define vnet_buffer2(b) ((vnet_buffer_opaque2_t *) (b)->opaque2)
+
+/*
+ * The opaque2 field of the vlib_buffer_t is intepreted as a
+ * vnet_buffer_opaque2_t. Hence it should be big enough to accommodate one.
+ */
+STATIC_ASSERT (sizeof (vnet_buffer_opaque2_t) <=
+              STRUCT_SIZE_OF (vlib_buffer_t, opaque2),
+              "VNET buffer opaque2 meta-data too large for vlib_buffer");
 
+format_function_t format_vnet_buffer;
 
 #endif /* included_vnet_buffer_h */