#include <vlib/vlib.h>
-/* VLIB buffer flags for ip4/ip6 packets. Set by input interfaces for ip4/ip6
- tcp/udp packets with hardware computed checksums. */
-#define LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED LOG2_VLIB_BUFFER_FLAG_USER(1)
-#define LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT LOG2_VLIB_BUFFER_FLAG_USER(2)
-#define IP_BUFFER_L4_CHECKSUM_COMPUTED (1 << LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED)
-#define IP_BUFFER_L4_CHECKSUM_CORRECT (1 << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT)
-
-/* VLAN header flags.
- * These bits are zeroed in vlib_buffer_init_for_free_list()
- * meaning wherever the buffer comes from they have a reasonable
- * value (eg, if ip4/ip6 generates the packet.)
+/**
+ * Flags that are set in the high order bits of ((vlib_buffer*)b)->flags
*/
-#define LOG2_ETH_BUFFER_VLAN_2_DEEP LOG2_VLIB_BUFFER_FLAG_USER(3)
-#define LOG2_ETH_BUFFER_VLAN_1_DEEP LOG2_VLIB_BUFFER_FLAG_USER(4)
-#define ETH_BUFFER_VLAN_2_DEEP (1 << LOG2_ETH_BUFFER_VLAN_2_DEEP)
-#define ETH_BUFFER_VLAN_1_DEEP (1 << LOG2_ETH_BUFFER_VLAN_1_DEEP)
-#define ETH_BUFFER_VLAN_BITS (ETH_BUFFER_VLAN_1_DEEP | \
- ETH_BUFFER_VLAN_2_DEEP)
+#define foreach_vnet_buffer_field \
+ _( 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, v) VNET_BUFFER_F_##name = (1 << LOG2_VLIB_BUFFER_FLAG_USER(bit)),
+ foreach_vnet_buffer_field
+#undef _
+};
-#define LOG2_BUFFER_HANDOFF_NEXT_VALID LOG2_VLIB_BUFFER_FLAG_USER(6)
-#define BUFFER_HANDOFF_NEXT_VALID (1 << LOG2_BUFFER_HANDOFF_NEXT_VALID)
+enum
+{
+#define _(bit, name, v) VNET_BUFFER_F_LOG2_##name = LOG2_VLIB_BUFFER_FLAG_USER(bit),
+ foreach_vnet_buffer_field
+#undef _
+};
-#define LOG2_VNET_BUFFER_LOCALLY_ORIGINATED LOG2_VLIB_BUFFER_FLAG_USER(7)
-#define VNET_BUFFER_LOCALLY_ORIGINATED (1 << LOG2_VNET_BUFFER_LOCALLY_ORIGINATED)
+/**
+ * @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 LOG2_VNET_BUFFER_SPAN_CLONE LOG2_VLIB_BUFFER_FLAG_USER(8)
-#define VNET_BUFFER_SPAN_CLONE (1 << LOG2_VNET_BUFFER_SPAN_CLONE)
#define foreach_buffer_opaque_union_subtype \
-_(ethernet) \
_(ip) \
_(swt) \
_(l2) \
_(map) \
_(map_t) \
_(ip_frag) \
+_(mpls) \
_(tcp)
/*
typedef struct
{
u32 sw_if_index[VLIB_N_RX_TX];
+ i16 l2_hdr_offset;
+ i16 l3_hdr_offset;
+ i16 l4_hdr_offset;
+ u16 flags;
union
{
- /* Ethernet. */
- struct
- {
- /* Saved value of current header by ethernet-input. */
- i32 start_of_ethernet_header;
- } ethernet;
-
/* IP4/6 buffer opaque. */
struct
{
protocol and ports. */
u32 flow_hash;
- /* next protocol */
- u32 save_protocol;
+ union
+ {
+ /* next protocol */
+ u32 save_protocol;
+
+ /* Hint for transport protocols */
+ u32 fib_index;
+ };
/* Rewrite length */
u32 save_rewrite_length;
u32 data;
} icmp;
- /* IP header offset from vlib_buffer.data - saved by ip*_local nodes */
- i32 start_of_ip_header;
+ /* 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;
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 */
} swt;
/* l2 bridging path, only valid there */
- struct
+ struct opaque_l2
{
u32 feature_bitmap;
u16 bd_index; /* bridge-domain index */
u8 l2_len; /* ethernet header length */
u8 shg; /* split-horizon group */
u16 l2fib_sn; /* l2fib bd/int seq_num */
+ u8 bd_age; /* aging enabled */
} l2;
/* l2tpv3 softwire encap, only valid there */
/* L2 classify */
struct
{
- u64 pad; /* paddind for l2 */
- u16 pad1;
+ struct opaque_l2 pad;
union
{
u32 table_index;
/* IP Fragmentation */
struct
{
+ u32 pad[2]; /* do not overlay w/ ip.adj_index[0,1] */
u16 header_offset;
u16 mtu;
u8 next_index;
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
+ {
+ u32 flags;
+ } snat;
+
u32 unused[6];
};
} vnet_buffer_opaque_t;
* The opaque field of the vlib_buffer_t is intepreted as a
* vnet_buffer_opaque_t. Hence it should be big enough to accommodate one.
*/
-STATIC_ASSERT (sizeof (vnet_buffer_opaque_t) <= STRUCT_SIZE_OF (vlib_buffer_t,
- opaque),
+STATIC_ASSERT (sizeof (vnet_buffer_opaque_t) <=
+ STRUCT_SIZE_OF (vlib_buffer_t, opaque),
"VNET buffer meta-data too large for vlib_buffer");
-STATIC_ASSERT (STRUCT_OFFSET_OF
- (vnet_buffer_opaque_t,
- l2_classify.table_index) >=
- STRUCT_SIZE_OF (vnet_buffer_opaque_t, l2),
- "l2_classify padding smaller than l2");
#define vnet_buffer(b) ((vnet_buffer_opaque_t *) (b)->opaque)
{
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 */
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