extern vnet_hw_interface_class_t gre_hw_interface_class;
-typedef enum {
+typedef enum
+{
#define gre_error(n,s) GRE_ERROR_##n,
#include <vnet/gre/error.def>
#undef gre_error
GRE_N_ERROR,
} gre_error_t;
+/**
+ * @brief The GRE tunnel type
+ */
+typedef enum gre_tunnel_type_t_
+{
+ /**
+ * L3 GRE (i.e. this tunnel is in L3 mode)
+ */
+ GRE_TUNNEL_TYPE_L3 = 0,
+ /**
+ * Transparent Ethernet Bridging - the tunnel is in L2 mode
+ */
+ GRE_TUNNEL_TYPE_TEB = 1,
+ /**
+ * ERSPAN type 2 - the tunnel is for port mirror SPAN output. Each tunnel is
+ * associated with a session ID and expected to be used for encap and output
+ * of mirrored packet from a L2 network only. There is no support for
+ * receiving ERSPAN packets from a GRE ERSPAN tunnel in VPP.
+ */
+ GRE_TUNNEL_TYPE_ERSPAN = 2,
+
+ GRE_TUNNEL_TYPE_N
+} gre_tunnel_type_t;
+
+#define GRE_TUNNEL_TYPE_NAMES { \
+ [GRE_TUNNEL_TYPE_L3] = "L3", \
+ [GRE_TUNNEL_TYPE_TEB] = "TEB", \
+ [GRE_TUNNEL_TYPE_ERSPAN] = "ERSPAN", \
+}
+
/**
* A GRE payload protocol registration
*/
-typedef struct {
+typedef struct
+{
/** Name (a c string). */
- char * name;
+ char *name;
/** GRE protocol type in host byte order. */
gre_protocol_t protocol;
+ /** GRE tunnel type */
+ gre_tunnel_type_t tunnel_type;
+
/** Node which handles this type. */
u32 node_index;
} gre_protocol_info_t;
/**
- * @brief The GRE tunnel type
+ * @brief Key for a IPv4 GRE Tunnel
*/
-typedef enum gre_tunnel_tyoe_t_
+typedef struct gre_tunnel_key4_t_
{
/**
- * L3 GRE (i.e. this tunnel is in L3 mode)
+ * Source and destination IP addresses
*/
- GRE_TUNNEL_TYPE_L3,
+ union
+ {
+ struct
+ {
+ ip4_address_t gtk_src;
+ ip4_address_t gtk_dst;
+ };
+ u64 gtk_as_u64;
+ };
+
/**
- * Transparent Ethernet Bridging - the tunnel is in L2 mode
+ * FIB table index, ERSPAN session ID and tunnel type in u32 bit fields:
+ * - The FIB table index the src,dst addresses are in, top 20 bits
+ * - The Session ID for ERSPAN tunnel type and 0 otherwise, next 10 bits
+ * - Tunnel type, bottom 2 bits
*/
- GRE_TUNNEL_TYPE_TEB,
-} gre_tunnel_type_t;
+ u32 gtk_fidx_ssid_type;
+} __attribute__ ((packed)) gre_tunnel_key4_t;
-#define GRE_TUNNEL_TYPE_NAMES { \
- [GRE_TUNNEL_TYPE_L3] = "L3", \
- [GRE_TUNNEL_TYPE_TEB] = "TEB", \
-}
+/**
+ * @brief Key for a IPv6 GRE Tunnel
+ * We use a different type so that the V4 key hash is as small as possible
+ */
+typedef struct gre_tunnel_key6_t_
+{
+ /**
+ * Source and destination IP addresses
+ */
+ ip6_address_t gtk_src;
+ ip6_address_t gtk_dst;
+
+ /**
+ * FIB table index, ERSPAN session ID and tunnel type in u32 bit fields:
+ * - The FIB table index the src,dst addresses are in, top 20 bits
+ * - The Session ID for ERSPAN tunnel type and 0 otherwise, next 10 bits
+ * - Tunnel type, bottom 2 bits
+ */
+ u32 gtk_fidx_ssid_type;
+} __attribute__ ((packed)) gre_tunnel_key6_t;
+
+#define GTK_FIB_INDEX_SHIFT 12
+#define GTK_FIB_INDEX_MASK 0xfffff000
+#define GTK_TYPE_SHIFT 0
+#define GTK_TYPE_MASK 0x3
+#define GTK_SESSION_ID_SHIFT 2
+#define GTK_SESSION_ID_MASK 0xffc
+#define GTK_SESSION_ID_MAX (GTK_SESSION_ID_MASK >> GTK_SESSION_ID_SHIFT)
+
+/**
+ * Union of the two possible key types
+ */
+typedef union gre_tunnel_key_t_
+{
+ gre_tunnel_key4_t gtk_v4;
+ gre_tunnel_key6_t gtk_v6;
+} gre_tunnel_key_t;
-#define GRE_TUNNEL_N_TYPES ((gre_tunnel_type_t)GRE_TUNNEL_TYPE_TEB+1)
+/**
+ * Used for GRE header seq number generation for ERSPAN encap
+ */
+typedef struct
+{
+ u32 seq_num;
+ u32 ref_count;
+} gre_sn_t;
+
+/**
+ * Hash key for GRE header seq number generation for ERSPAN encap
+ */
+typedef struct
+{
+ ip46_address_t src;
+ ip46_address_t dst;
+ u32 fib_index;
+} gre_sn_key_t;
/**
* @brief A representation of a GRE tunnel
*/
-typedef struct {
+typedef struct
+{
/**
* Linkage into the FIB object graph
*/
fib_node_t node;
+ /**
+ * The hash table's key stored in separate memory since the tunnel_t
+ * memory can realloc.
+ */
+ gre_tunnel_key_t *key;
+
/**
* The tunnel's source/local address
*/
u32 sibling_index;
/**
- * on a L2 tunnel this is the VLIB arc from the L2-tx to the l2-midchain
+ * an L2 tunnel always rquires an L2 midchain. cache here for DP.
*/
- u32 l2_tx_arc;
+ adj_index_t l2_adj_index;
/**
- * an L2 tunnel always rquires an L2 midchain. cache here for DP.
+ * ERSPAN type 2 session ID, least significant 10 bits of u16
*/
- adj_index_t l2_adj_index;
+ u16 session_id;
+
+ /**
+ * GRE header sequence number (SN) used for ERSPAN type 2 header, must be
+ * bumped automically to be thread safe. As multiple GRE tunnels are created
+ * for the same fib-idx/DIP/SIP with different ERSPAN session number, they all
+ * share the same SN which is kept per FIB/DIP/SIP, as specified by RFC2890.
+ */
+ gre_sn_t *gre_sn;
+
+
+ u32 dev_instance; /* Real device instance in tunnel vector */
+ u32 user_instance; /* Instance name being shown to user */
} gre_tunnel_t;
+typedef struct
+{
+ u8 next_index;
+ u8 tunnel_type;
+} next_info_t;
+
/**
* @brief GRE related global data
*/
-typedef struct {
+typedef struct
+{
/**
* pool of tunnel instances
*/
/**
* GRE payload protocol registrations
*/
- gre_protocol_info_t * protocol_infos;
+ gre_protocol_info_t *protocol_infos;
/**
* Hash tables mapping name/protocol to protocol info index.
*/
- uword * protocol_info_by_name, * protocol_info_by_protocol;
+ uword *protocol_info_by_name, *protocol_info_by_protocol;
/**
- * Hash mapping ipv4 src/dst addr pair to tunnel
+ * Hash mapping to tunnels with ipv4 src/dst addr
*/
- uword * tunnel_by_key4;
+ uword *tunnel_by_key4;
/**
- * Hash mapping ipv6 src/dst addr pair to tunnel
- */
- uword * tunnel_by_key6;
+ * Hash mapping to tunnels with ipv6 src/dst addr
+ */
+ uword *tunnel_by_key6;
/**
- * Free vlib hw_if_indices.
- * A free list per-tunnel type since the interfaces ctreated are fo different
- * types and we cannot change the type.
+ * Hash mapping tunnel src/dst addr and fib-idx to sequence number
*/
- u32 * free_gre_tunnel_hw_if_indices[GRE_TUNNEL_N_TYPES];
+ uword *seq_num_by_key;
/**
* Mapping from sw_if_index to tunnel index
*/
- u32 * tunnel_index_by_sw_if_index;
+ u32 *tunnel_index_by_sw_if_index;
/* Sparse vector mapping gre protocol in network byte order
to next index. */
- u16 * next_by_protocol;
+ next_info_t *next_by_protocol;
/* convenience */
- vlib_main_t * vlib_main;
- vnet_main_t * vnet_main;
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+
+ /* Record used instances */
+ uword *instance_used;
} gre_main_t;
/**
* @brief IPv4 and GRE header.
*/
+/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
ip4_header_t ip4;
gre_header_t gre;
}) ip4_and_gre_header_t;
+/* *INDENT-ON* */
/**
* @brief IPv6 and GRE header.
*/
+/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
ip6_header_t ip6;
gre_header_t gre;
}) ip6_and_gre_header_t;
+/* *INDENT-ON* */
always_inline gre_protocol_info_t *
gre_get_protocol_info (gre_main_t * em, gre_protocol_t protocol)
{
- uword * p = hash_get (em->protocol_info_by_protocol, protocol);
+ uword *p = hash_get (em->protocol_info_by_protocol, protocol);
return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0;
}
extern gre_main_t gre_main;
-/* Register given node index to take input for given gre type. */
-void
-gre_register_input_type (vlib_main_t * vm,
- gre_protocol_t protocol,
- u32 node_index);
-
-extern clib_error_t * gre_interface_admin_up_down (vnet_main_t * vnm,
- u32 hw_if_index,
- u32 flags);
+extern clib_error_t *gre_interface_admin_up_down (vnet_main_t * vnm,
+ u32 hw_if_index, u32 flags);
extern void gre_tunnel_stack (adj_index_t ai);
extern void gre_update_adj (vnet_main_t * vnm,
- u32 sw_if_index,
- adj_index_t ai);
+ u32 sw_if_index, adj_index_t ai);
format_function_t format_gre_protocol;
format_function_t format_gre_header;
extern vlib_node_registration_t gre4_input_node;
extern vlib_node_registration_t gre6_input_node;
+extern vlib_node_registration_t gre_encap_node;
extern vnet_device_class_t gre_device_class;
-extern vnet_device_class_t gre_device_teb_class;
/* Parse gre protocol as 0xXXXX or protocol name.
In either host or network byte order. */
unformat_function_t unformat_pg_gre_header;
void
-gre_register_input_protocol (vlib_main_t * vm,
- gre_protocol_t protocol,
- u32 node_index);
+gre_register_input_protocol (vlib_main_t * vm, gre_protocol_t protocol,
+ u32 node_index, gre_tunnel_type_t tunnel_type);
/* manually added to the interface output node in gre.c */
#define GRE_OUTPUT_NEXT_LOOKUP 1
-typedef struct {
+typedef struct
+{
u8 is_add;
-
- ip46_address_t src, dst;
+ u8 tunnel_type;
u8 is_ipv6;
+ u32 instance;
+ ip46_address_t src, dst;
u32 outer_fib_id;
- u8 teb;
+ u16 session_id;
} vnet_gre_add_del_tunnel_args_t;
int vnet_gre_add_del_tunnel
- (vnet_gre_add_del_tunnel_args_t *a, u32 * sw_if_indexp);
+ (vnet_gre_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
+
+static inline void
+gre_mk_key4 (ip4_address_t src,
+ ip4_address_t dst,
+ u32 fib_index, u8 ttype, u16 session_id, gre_tunnel_key4_t * key)
+{
+ key->gtk_src = src;
+ key->gtk_dst = dst;
+ key->gtk_fidx_ssid_type = ttype |
+ (fib_index << GTK_FIB_INDEX_SHIFT) | (session_id << GTK_SESSION_ID_SHIFT);
+}
+
+static inline int
+gre_match_key4 (const gre_tunnel_key4_t * key1,
+ const gre_tunnel_key4_t * key2)
+{
+ return ((key1->gtk_as_u64 == key2->gtk_as_u64) &&
+ (key1->gtk_fidx_ssid_type == key2->gtk_fidx_ssid_type));
+}
+
+static inline void
+gre_mk_key6 (const ip6_address_t * src,
+ const ip6_address_t * dst,
+ u32 fib_index, u8 ttype, u16 session_id, gre_tunnel_key6_t * key)
+{
+ key->gtk_src = *src;
+ key->gtk_dst = *dst;
+ key->gtk_fidx_ssid_type = ttype |
+ (fib_index << GTK_FIB_INDEX_SHIFT) | (session_id << GTK_SESSION_ID_SHIFT);
+}
+
+static inline int
+gre_match_key6 (const gre_tunnel_key6_t * key1,
+ const gre_tunnel_key6_t * key2)
+{
+ return ((key1->gtk_src.as_u64[0] == key2->gtk_src.as_u64[0]) &&
+ (key1->gtk_src.as_u64[1] == key2->gtk_src.as_u64[1]) &&
+ (key1->gtk_dst.as_u64[0] == key2->gtk_dst.as_u64[0]) &&
+ (key1->gtk_dst.as_u64[1] == key2->gtk_dst.as_u64[1]) &&
+ (key1->gtk_fidx_ssid_type == key2->gtk_fidx_ssid_type));
+}
+
+static inline void
+gre_mk_sn_key (const gre_tunnel_t * gt, gre_sn_key_t * key)
+{
+ key->src = gt->tunnel_src;
+ key->dst = gt->tunnel_dst.fp_addr;
+ key->fib_index = gt->outer_fib_index;
+}
#endif /* included_gre_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff