diff options
Diffstat (limited to 'vnet/vnet/hdlc/node.c')
-rw-r--r-- | vnet/vnet/hdlc/node.c | 351 |
1 files changed, 0 insertions, 351 deletions
diff --git a/vnet/vnet/hdlc/node.c b/vnet/vnet/hdlc/node.c deleted file mode 100644 index 4fe0296aca1..00000000000 --- a/vnet/vnet/hdlc/node.c +++ /dev/null @@ -1,351 +0,0 @@ -/* - * Copyright (c) 2015 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. - */ -/* - * hdlc_node.c: hdlc packet processing - * - * Copyright (c) 2010 Eliot Dresselhaus - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sublicense, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE - * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION - * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION - * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include <vlib/vlib.h> -#include <vnet/pg/pg.h> -#include <vnet/hdlc/hdlc.h> -#include <vppinfra/sparse_vec.h> - -#define foreach_hdlc_input_next \ - _ (PUNT, "error-punt") \ - _ (DROP, "error-drop") - -typedef enum { -#define _(s,n) HDLC_INPUT_NEXT_##s, - foreach_hdlc_input_next -#undef _ - HDLC_INPUT_N_NEXT, -} hdlc_input_next_t; - -typedef struct { - u8 packet_data[32]; -} hdlc_input_trace_t; - -static u8 * format_hdlc_input_trace (u8 * s, va_list * va) -{ - CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); - CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); - hdlc_input_trace_t * t = va_arg (*va, hdlc_input_trace_t *); - - s = format (s, "%U", format_hdlc_header, t->packet_data); - - return s; -} - -typedef struct { - /* Sparse vector mapping hdlc protocol in network byte order - to next index. */ - u16 * next_by_protocol; - - u32 * sparse_index_by_next_index; -} hdlc_input_runtime_t; - -static uword -hdlc_input (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - hdlc_input_runtime_t * rt = (void *) node->runtime_data; - u32 n_left_from, next_index, i_next, * from, * to_next; - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - vlib_trace_frame_buffers_only (vm, node, - from, - n_left_from, - sizeof (from[0]), - sizeof (hdlc_input_trace_t)); - - next_index = node->cached_next_index; - i_next = vec_elt (rt->sparse_index_by_next_index, 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 >= 4 && n_left_to_next >= 2) - { - u32 bi0, bi1; - vlib_buffer_t * b0, * b1; - hdlc_header_t * h0, * h1; - u32 i0, i1, len0, len1, protocol0, protocol1, enqueue_code; - - /* Prefetch next iteration. */ - { - vlib_buffer_t * b2, * b3; - - b2 = vlib_get_buffer (vm, from[2]); - b3 = vlib_get_buffer (vm, from[3]); - - vlib_prefetch_buffer_header (b2, LOAD); - vlib_prefetch_buffer_header (b3, LOAD); - - CLIB_PREFETCH (b2->data, sizeof (h0[0]), LOAD); - CLIB_PREFETCH (b3->data, sizeof (h1[0]), LOAD); - } - - bi0 = from[0]; - bi1 = from[1]; - to_next[0] = bi0; - to_next[1] = bi1; - from += 2; - to_next += 2; - n_left_to_next -= 2; - n_left_from -= 2; - - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); - - h0 = (void *) (b0->data + b0->current_data); - h1 = (void *) (b1->data + b1->current_data); - - protocol0 = h0->protocol; - protocol1 = h1->protocol; - - /* Add padding bytes for OSI protocols. */ - len0 = sizeof (h0[0]); - len1 = sizeof (h1[0]); - - len0 += protocol0 == clib_host_to_net_u16 (HDLC_PROTOCOL_osi); - len1 += protocol1 == clib_host_to_net_u16 (HDLC_PROTOCOL_osi); - - b0->current_data += len0; - b1->current_data += len1; - - b0->current_length -= len0; - b1->current_length -= len1; - - /* Index sparse array with network byte order. */ - sparse_vec_index2 (rt->next_by_protocol, protocol0, protocol1, &i0, &i1); - - b0->error = node->errors[i0 == SPARSE_VEC_INVALID_INDEX ? HDLC_ERROR_UNKNOWN_PROTOCOL : HDLC_ERROR_NONE]; - b1->error = node->errors[i1 == SPARSE_VEC_INVALID_INDEX ? HDLC_ERROR_UNKNOWN_PROTOCOL : HDLC_ERROR_NONE]; - - enqueue_code = (i0 != i_next) + 2*(i1 != i_next); - - if (PREDICT_FALSE (enqueue_code != 0)) - { - switch (enqueue_code) - { - case 1: - /* A B A */ - to_next[-2] = bi1; - to_next -= 1; - n_left_to_next += 1; - vlib_set_next_frame_buffer (vm, node, vec_elt (rt->next_by_protocol, i0), bi0); - break; - - case 2: - /* A A B */ - to_next -= 1; - n_left_to_next += 1; - vlib_set_next_frame_buffer (vm, node, vec_elt (rt->next_by_protocol, i1), bi1); - break; - - case 3: - /* A B B or A B C */ - to_next -= 2; - n_left_to_next += 2; - vlib_set_next_frame_buffer (vm, node, vec_elt (rt->next_by_protocol, i0), bi0); - vlib_set_next_frame_buffer (vm, node, vec_elt (rt->next_by_protocol, i1), bi1); - if (i0 == i1) - { - vlib_put_next_frame (vm, node, next_index, - n_left_to_next); - i_next = i1; - next_index = vec_elt (rt->next_by_protocol, i_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) - { - u32 bi0; - vlib_buffer_t * b0; - hdlc_header_t * h0; - u32 i0, len0, protocol0; - - 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); - - h0 = (void *) (b0->data + b0->current_data); - - protocol0 = h0->protocol; - - /* Add padding bytes for OSI protocols. */ - len0 = sizeof (h0[0]); - len0 += protocol0 == clib_host_to_net_u16 (HDLC_PROTOCOL_osi); - - b0->current_data += len0; - b0->current_length -= len0; - - i0 = sparse_vec_index (rt->next_by_protocol, protocol0); - - b0->error = node->errors[i0 == SPARSE_VEC_INVALID_INDEX ? HDLC_ERROR_UNKNOWN_PROTOCOL : HDLC_ERROR_NONE]; - - /* Sent packet to wrong next? */ - if (PREDICT_FALSE (i0 != i_next)) - { - /* Return old frame; remove incorrectly enqueued packet. */ - vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1); - - /* Send to correct next. */ - i_next = i0; - next_index = vec_elt (rt->next_by_protocol, i_next); - vlib_get_next_frame (vm, node, next_index, - to_next, n_left_to_next); - - to_next[0] = bi0; - to_next += 1; - n_left_to_next -= 1; - } - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - return from_frame->n_vectors; -} - -static char * hdlc_error_strings[] = { -#define hdlc_error(n,s) s, -#include "error.def" -#undef hdlc_error -}; - -VLIB_REGISTER_NODE (hdlc_input_node) = { - .function = hdlc_input, - .name = "hdlc-input", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - - .runtime_data_bytes = sizeof (hdlc_input_runtime_t), - - .n_errors = HDLC_N_ERROR, - .error_strings = hdlc_error_strings, - - .n_next_nodes = HDLC_INPUT_N_NEXT, - .next_nodes = { -#define _(s,n) [HDLC_INPUT_NEXT_##s] = n, - foreach_hdlc_input_next -#undef _ - }, - - .format_buffer = format_hdlc_header_with_length, - .format_trace = format_hdlc_input_trace, - .unformat_buffer = unformat_hdlc_header, -}; - -static clib_error_t * hdlc_input_init (vlib_main_t * vm) -{ - hdlc_input_runtime_t * rt; - - { - clib_error_t * error = vlib_call_init_function (vm, hdlc_init); - if (error) - clib_error_report (error); - } - - hdlc_setup_node (vm, hdlc_input_node.index); - - rt = vlib_node_get_runtime_data (vm, hdlc_input_node.index); - - rt->next_by_protocol = sparse_vec_new - (/* elt bytes */ sizeof (rt->next_by_protocol[0]), - /* bits in index */ BITS (((hdlc_header_t *) 0)->protocol)); - - vec_validate (rt->sparse_index_by_next_index, HDLC_INPUT_NEXT_DROP); - vec_validate (rt->sparse_index_by_next_index, HDLC_INPUT_NEXT_PUNT); - rt->sparse_index_by_next_index[HDLC_INPUT_NEXT_DROP] - = SPARSE_VEC_INVALID_INDEX; - rt->sparse_index_by_next_index[HDLC_INPUT_NEXT_PUNT] - = SPARSE_VEC_INVALID_INDEX; - - return 0; -} - -VLIB_INIT_FUNCTION (hdlc_input_init); - -void -hdlc_register_input_protocol (vlib_main_t * vm, - hdlc_protocol_t protocol, - u32 node_index) -{ - hdlc_main_t * em = &hdlc_main; - hdlc_protocol_info_t * pi; - hdlc_input_runtime_t * rt; - u16 * n; - u32 i; - - { - clib_error_t * error = vlib_call_init_function (vm, hdlc_input_init); - if (error) - clib_error_report (error); - } - - pi = hdlc_get_protocol_info (em, protocol); - pi->node_index = node_index; - pi->next_index = vlib_node_add_next (vm, - hdlc_input_node.index, - node_index); - - /* Setup hdlc protocol -> next index sparse vector mapping. */ - rt = vlib_node_get_runtime_data (vm, hdlc_input_node.index); - n = sparse_vec_validate (rt->next_by_protocol, clib_host_to_net_u16 (protocol)); - n[0] = pi->next_index; - - /* Rebuild next index -> sparse index inverse mapping when sparse vector - is updated. */ - vec_validate (rt->sparse_index_by_next_index, pi->next_index); - for (i = 1; i < vec_len (rt->next_by_protocol); i++) - rt->sparse_index_by_next_index[rt->next_by_protocol[i]] = i; -} |