diff options
author | Neale Ranns <nranns@cisco.com> | 2017-10-21 10:53:20 -0700 |
---|---|---|
committer | Damjan Marion <dmarion.lists@gmail.com> | 2017-11-09 15:16:52 +0000 |
commit | d792d9c01e60656cbfe1b0f1fd6a9b125f5dab0c (patch) | |
tree | db88d99dd8102389fb92e8ed44bc7d6a55dc3080 /src/vnet/bier/bier_disp_lookup_node.c | |
parent | a2ff7b8cfc829ffbb6d5de7534efb51f7cba9cf3 (diff) |
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>
Diffstat (limited to 'src/vnet/bier/bier_disp_lookup_node.c')
-rw-r--r-- | src/vnet/bier/bier_disp_lookup_node.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/vnet/bier/bier_disp_lookup_node.c b/src/vnet/bier/bier_disp_lookup_node.c new file mode 100644 index 00000000000..15515f467ca --- /dev/null +++ b/src/vnet/bier/bier_disp_lookup_node.c @@ -0,0 +1,147 @@ +/* + * 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 <vnet/bier/bier_disp_table.h> +#include <vnet/bier/bier_hdr_inlines.h> + +/** + * @brief A struct to hold tracing information for the MPLS label imposition + * node. + */ +typedef struct bier_disp_lookup_trace_t_ +{ + /** + * BIER source BP used in the lookup - host order + */ + bier_bp_t bp; + /** + * BIER disp table + */ + index_t bdti; +} bier_disp_lookup_trace_t; + +/** + * Next nodes from BIER disposition lookup + */ +typedef enum bier_disp_lookup_next_t_ +{ + BIER_DISP_LOOKUP_NEXT_DROP, + BIER_DISP_LOOKUP_NEXT_DISPATCH, +} bier_disp_lookup_next_t; +#define BIER_DISP_LOOKUP_N_NEXT (BIER_DISP_LOOKUP_NEXT_DISPATCH+1) + +always_inline uword +bier_disp_lookup_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + u32 n_left_from, next_index, * from, * to_next; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 n_left_to_next; + + vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 0 && n_left_to_next > 0) + { + const bier_hdr_t *hdr0; + vlib_buffer_t * b0; + u32 bdei0, bdti0; + u32 next0, bi0; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + + bdti0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX]; + hdr0 = vlib_buffer_get_current(b0); + + /* + * lookup - source is in network order. + */ + bdei0 = bier_disp_table_lookup(bdti0, bier_hdr_get_src_id(hdr0)); + + if (PREDICT_FALSE(INDEX_INVALID == bdei0)) + { + next0 = BIER_DISP_LOOKUP_NEXT_DROP; + } + else + { + next0 = BIER_DISP_LOOKUP_NEXT_DISPATCH; + } + + vnet_buffer(b0)->ip.adj_index[VLIB_TX] = bdei0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + bier_disp_lookup_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->bp = clib_net_to_host_u16(bier_hdr_get_src_id(hdr0)); + tr->bdti = bdti0; + } + + vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + } + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + return from_frame->n_vectors; +} + +static u8 * +format_bier_disp_lookup_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + bier_disp_lookup_trace_t * t; + + t = va_arg (*args, bier_disp_lookup_trace_t *); + s = format (s, "tbl:%d src:%d", t->bdti, t->bp); + + return (s); +} + +static uword +bier_disp_lookup (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (bier_disp_lookup_inline(vm, node, frame)); +} + +VLIB_REGISTER_NODE (bier_disp_lookup_node) = { + .function = bier_disp_lookup, + .name = "bier-disp-lookup", + .vector_size = sizeof (u32), + + .format_trace = format_bier_disp_lookup_trace, + .n_next_nodes = BIER_DISP_LOOKUP_N_NEXT, + .next_nodes = { + [BIER_DISP_LOOKUP_NEXT_DROP] = "bier-drop", + [BIER_DISP_LOOKUP_NEXT_DISPATCH] = "bier-disp-dispatch", + } +}; +VLIB_NODE_FUNCTION_MULTIARCH (bier_disp_lookup_node, bier_disp_lookup) |