BIER: fix support for longer bit-string lengths

[vpp.git] / src / vnet / bier / bier_types.h

diff --git a/src/vnet/bier/bier_types.h b/src/vnet/bier/bier_types.h
index fa1cd42..ebddbe8 100644 (file)
--- a/src/vnet/bier/bier_types.h
+++ b/src/vnet/bier/bier_types.h
@@ -56,6 +56,11 @@ typedef enum bier_hdr_len_id_t_ {
     BIER_HDR_LEN_256,
     BIER_HDR_LEN_512,
     BIER_HDR_LEN_1024,
+    /**
+     * Bit-string lengths greater than 1024 are not supported due to the
+     * limited about pf space available in a vlib_buffer_t to prepend a
+     * BIER header at imposition.
+     */
     BIER_HDR_LEN_2048,
     BIER_HDR_LEN_4096,
     BIER_HDR_LEN_INVALID,
@@ -251,56 +256,6 @@ typedef enum bier_hdr_ctrl_sub_code_t_ {
  */
 typedef u8 bier_bit_mask_bucket_t;
 
-/**
- * A BIER Bit-String value of length 64 bits.
- */
-typedef struct bier_bit_mask_64_t_ {
-    bier_bit_mask_bucket_t bits[BIER_HDR_BUCKETS_64];
-} bier_bit_mask_64_t;
-
-/**
- * A BIER Bit-String value of length 128 bits.
- */
-typedef struct bier_bit_mask_128_t_ {
-    bier_bit_mask_bucket_t bits[BIER_HDR_BUCKETS_128];
-} bier_bit_mask_128_t;
-
-/**
- * A BIER Bit-String value of length 256 bits.
- */
-typedef struct bier_bit_mask_256_t_ {
-    bier_bit_mask_bucket_t bits[BIER_HDR_BUCKETS_256];
-} bier_bit_mask_256_t;
-
-/**
- * A BIER Bit-String value of length 512 bits.
- */
-typedef struct bier_bit_mask_512_t_ {
-    bier_bit_mask_bucket_t bits[BIER_HDR_BUCKETS_512];
-} bier_bit_mask_512_t;
-
-/**
- * A BIER Bit-String value of length 1024 bits.
- */
-typedef struct bier_bit_mask_1024_t_ {
-    bier_bit_mask_bucket_t bits[BIER_HDR_BUCKETS_1024];
-} bier_bit_mask_1024_t;
-
-/**
- * A BIER Bit-String value of length 2048 bits.
- */
-typedef struct bier_bit_mask_2048_t_ {
-    bier_bit_mask_bucket_t bits[BIER_HDR_BUCKETS_2048];
-} bier_bit_mask_2048_t;
-
-/**
- * A BIER Bit-String value of length 4096 bits.
- */
-typedef struct bier_bit_mask_4096_t_ {
-    bier_bit_mask_bucket_t bits[BIER_HDR_BUCKETS_4096];
-} bier_bit_mask_4096_t;
-
-
 /**
  * 256 bits = 32 bytes
  */
@@ -332,13 +287,6 @@ typedef struct bier_bit_string_t_ {
     bier_bit_mask_bucket_t *bbs_buckets;
 } bier_bit_string_t;
 
-/**
- * A BIER Bit-mask value
- *
- * The size of this mask represents this platforms BIER capabilities
- */
-typedef bier_bit_mask_256_t bier_bit_mask_t;
-
 /**
  * A bit positon
  *  as assigned to egress PEs
@@ -504,4 +452,32 @@ extern u32 bier_hdr_len_id_to_prefix_len(bier_hdr_len_id_t id);
 #define BIER_ERR_PANIC 3
 typedef int bier_rc;
 
+/**
+ * The BIER universal 'label'
+ */
+typedef u32 bier_bift_id_t;
+
+/**
+ * An invalid value for the BIFT ID
+ * all ones implies a BSL that's invalid.
+ */
+#define BIER_BIFT_ID_INVALID (~0)
+
+extern u16 bier_bfit_id_get_sub_domain(bier_bift_id_t bift_id);
+extern u16 bier_bfit_id_get_set(bier_bift_id_t bift_id);
+extern bier_hdr_proto_id_t bier_bift_id_get_bit_string_length(bier_bift_id_t bift_id);
+
+/**
+ * Encode a BIFT-ID as per draft-wijnandsxu-bier-non-mpls-bift-encoding-00.txt
+ */
+extern bier_bift_id_t bier_bift_id_encode(bier_table_set_id_t set,
+                                          bier_table_sub_domain_id_t sd,
+                                          bier_hdr_len_id_t bsl);
+extern void bier_bift_id_decode(bier_bift_id_t id,
+                                bier_table_set_id_t *set,
+                                bier_table_sub_domain_id_t *sd,
+                                bier_hdr_len_id_t *bsl);
+
+extern u8* format_bier_bift_id(u8 *s, va_list *ap);
+
 #endif /* __BIER_TYPES_H__ */