BIER

- see draft-ietf-bier-mpls-encapsulation-10
- midpoint, head and tail functions
- supported payload protocols; IPv4 and IPv6 only.

Change-Id: I59d7363bb6fdfdce8e4016a68a9c8f5a5e5791cb
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 190 insertions, 0 deletions

diff --git a/src/vnet/bier/bier_types.c b/src/vnet/bier/bier_types.c
new file mode 100644
index 00000000000..0d27524aeb1
--- /dev/null
+++ b/src/vnet/bier/bier_types.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vppinfra/types.h>
+#include <vnet/bier/bier_types.h>
+#include <vnet/bier/bier_hdr_inlines.h>
+
+/*
+ * enum to string conversions
+ */
+const static char* const bier_hdr_len_id_names[] = BIER_HDR_LEN_IDS;
+const static char* const bier_hdr_proto_names[] = BIER_HDR_PROTO_ID_NAMES;
+
+const static u16 bier_hdr_len_num_buckets[] = {
+    [BIER_HDR_LEN_INVALID] = 0,
+    [BIER_HDR_LEN_64] = 8,
+    [BIER_HDR_LEN_128] = 16,
+    [BIER_HDR_LEN_256] = 32,
+    [BIER_HDR_LEN_512] = 64,
+    [BIER_HDR_LEN_1024] = 128,
+    [BIER_HDR_LEN_2048] = 256,
+    [BIER_HDR_LEN_4096] = 512,
+};
+
+const static u16 bier_hdr_len_num_bits[] = {
+    [BIER_HDR_LEN_INVALID] = 0,
+    [BIER_HDR_LEN_64] = 64,
+    [BIER_HDR_LEN_128] = 128,
+    [BIER_HDR_LEN_256] = 256,
+    [BIER_HDR_LEN_512] = 512,
+    [BIER_HDR_LEN_1024] = 1024,
+    [BIER_HDR_LEN_2048] = 2048,
+    [BIER_HDR_LEN_4096] = 4096,
+};
+
+const static u16 bier_hdr_len_prefix_len[] = {
+    [BIER_HDR_LEN_INVALID] = 0,
+    [BIER_HDR_LEN_64] = 7,
+    [BIER_HDR_LEN_128] = 8,
+    [BIER_HDR_LEN_256] = 9,
+    [BIER_HDR_LEN_512] = 10,
+    [BIER_HDR_LEN_1024] = 11,
+    [BIER_HDR_LEN_2048] = 12,
+    [BIER_HDR_LEN_4096] = 13,
+};
+
+uint32_t
+bier_hdr_len_id_to_num_buckets (bier_hdr_len_id_t id)
+{
+    return (bier_hdr_len_num_buckets[id]);
+}
+
+uint32_t
+bier_hdr_len_id_to_num_bytes (bier_hdr_len_id_t id)
+{
+    return (bier_hdr_len_id_to_num_buckets(id));
+}
+
+uint32_t
+bier_hdr_len_id_to_max_bucket (bier_hdr_len_id_t id)
+{
+    return (bier_hdr_len_id_to_num_buckets(id) - 1);
+}
+
+uint32_t
+bier_hdr_len_id_to_num_bits (bier_hdr_len_id_t id)
+{
+    return (bier_hdr_len_num_bits[id]);
+}
+
+uint32_t
+bier_hdr_len_id_to_max_bit (bier_hdr_len_id_t id)
+{
+    return (bier_hdr_len_id_to_num_bits(id));
+}
+
+uint32_t
+bier_hdr_len_id_to_prefix_len (bier_hdr_len_id_t id)
+{
+    return (bier_hdr_len_prefix_len[id]);
+}
+
+u8 *
+format_bier_hdr_len_id (u8 *s, va_list *ap)
+{
+    bier_hdr_len_id_t hli = va_arg(*ap, int); // int promotion of bier_hdr_len_id_t
+
+    return (format(s, "%s", bier_hdr_len_id_names[hli]));
+}
+
+u8 *
+format_bier_hdr_proto (u8 *s, va_list *ap)
+{
+    bier_hdr_proto_id_t pi = va_arg(*ap, int);
+
+    return (format(s, "%s", bier_hdr_proto_names[pi]));
+}
+
+int
+bier_table_id_cmp (const bier_table_id_t *btid1,
+                   const bier_table_id_t *btid2)
+{
+    int res;
+
+    res = (btid1->bti_set - btid2->bti_set);
+
+    if (0 == res)
+    {
+        res  = (btid1->bti_sub_domain - btid2->bti_sub_domain);
+    }
+    if (0 == res)
+    {
+        res = (btid1->bti_ecmp - btid2->bti_ecmp);
+    }
+    if (0 == res)
+    {
+        res = (btid1->bti_hdr_len - btid2->bti_hdr_len);
+    }
+    if (0 == res)
+    {
+        res = (btid1->bti_type - btid2->bti_type);
+    }
+    return (res);
+}
+
+dpo_proto_t
+bier_hdr_proto_to_dpo (bier_hdr_proto_id_t bproto)
+{
+    switch (bproto)
+    {
+    case BIER_HDR_PROTO_INVALID:
+    case BIER_HDR_PROTO_CTRL:
+    case BIER_HDR_PROTO_OAM:
+        ASSERT(0);
+        break;
+    case BIER_HDR_PROTO_MPLS_DOWN_STREAM:
+    case BIER_HDR_PROTO_MPLS_UP_STREAM:
+        return (DPO_PROTO_MPLS);
+    case BIER_HDR_PROTO_ETHERNET:
+    case BIER_HDR_PROTO_VXLAN:
+        return (DPO_PROTO_ETHERNET);
+    case BIER_HDR_PROTO_IPV4:
+        return (DPO_PROTO_IP4);
+    case BIER_HDR_PROTO_IPV6:
+        return (DPO_PROTO_IP4);
+    }
+
+    return (DPO_PROTO_NUM);
+}
+
+u8 *
+format_bier_table_id (u8 *s, va_list *ap)
+{
+    bier_table_id_t *btid = va_arg(*ap, bier_table_id_t *);
+
+    return (format(s, "sub-domain:%d set:%d ecmp:%d bsl:%U",
+                   btid->bti_sub_domain,
+                   btid->bti_set,
+                   btid->bti_ecmp,
+                   format_bier_hdr_len_id, btid->bti_hdr_len));
+}
+
+u8 *
+format_bier_hdr (u8 *s, va_list *ap)
+{
+    bier_hdr_t *bh = va_arg(*ap, bier_hdr_t *);
+    bier_hdr_t copy = *bh;
+
+    bier_hdr_ntoh(&copy);
+
+    return (format(s, "nibble:%d version:%d hdr-len:%U entropy:%d proto:%U src:%d",
+                   bier_hdr_get_1st_nibble(&copy),
+                   bier_hdr_get_version(&copy),
+                   format_bier_hdr_len_id, bier_hdr_get_len_id(&copy),
+                   bier_hdr_get_entropy(&copy),
+                   format_bier_hdr_proto, bier_hdr_get_proto_id(&copy),
+                   bier_hdr_get_src_id(&copy)));
+}