diff options
Diffstat (limited to 'vnet/vnet/snap/node.c')
| -rw-r--r-- | vnet/vnet/snap/node.c | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/vnet/vnet/snap/node.c b/vnet/vnet/snap/node.c deleted file mode 100644 index 884ff32444b..00000000000 --- a/vnet/vnet/snap/node.c +++ /dev/null @@ -1,353 +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. - */ -/* - * snap_node.c: snap 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/llc/llc.h> -#include <vnet/snap/snap.h> - -typedef enum -{ - SNAP_INPUT_NEXT_DROP, - SNAP_INPUT_NEXT_PUNT, - SNAP_INPUT_NEXT_ETHERNET_TYPE, - SNAP_INPUT_N_NEXT, -} snap_input_next_t; - -typedef struct -{ - u8 packet_data[32]; -} snap_input_trace_t; - -static u8 * -format_snap_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 *); - snap_input_trace_t *t = va_arg (*va, snap_input_trace_t *); - - s = format (s, "%U", format_snap_header, t->packet_data); - - return s; -} - -static uword -snap_input (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * from_frame) -{ - snap_main_t *sm = &snap_main; - u32 n_left_from, next_index, *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 (snap_input_trace_t)); - - 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 >= 4 && n_left_to_next >= 2) - { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; - snap_header_t *h0, *h1; - snap_protocol_info_t *pi0, *pi1; - u8 next0, next1, is_ethernet0, is_ethernet1, len0, len1, - enqueue_code; - u32 oui0, oui1; - - /* 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); - - oui0 = snap_header_get_oui (h0); - oui1 = snap_header_get_oui (h1); - - is_ethernet0 = oui0 == IEEE_OUI_ethernet; - is_ethernet1 = oui1 == IEEE_OUI_ethernet; - - len0 = sizeof (h0[0]) - (is_ethernet0 ? sizeof (h0->protocol) : 0); - len1 = sizeof (h1[0]) - (is_ethernet1 ? sizeof (h1->protocol) : 0); - - b0->current_data += len0; - b1->current_data += len1; - - b0->current_length -= len0; - b1->current_length -= len1; - - pi0 = snap_get_protocol_info (sm, h0); - pi1 = snap_get_protocol_info (sm, h1); - - next0 = pi0 ? pi0->next_index : SNAP_INPUT_NEXT_DROP; - next1 = pi1 ? pi1->next_index : SNAP_INPUT_NEXT_DROP; - - next0 = is_ethernet0 ? SNAP_INPUT_NEXT_ETHERNET_TYPE : next0; - next1 = is_ethernet1 ? SNAP_INPUT_NEXT_ETHERNET_TYPE : next1; - - /* In case of error. */ - b0->error = node->errors[SNAP_ERROR_UNKNOWN_PROTOCOL]; - b1->error = node->errors[SNAP_ERROR_UNKNOWN_PROTOCOL]; - - enqueue_code = (next0 != next_index) + 2 * (next1 != next_index); - - 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, next0, bi0); - break; - - case 2: - /* A A B */ - to_next -= 1; - n_left_to_next += 1; - vlib_set_next_frame_buffer (vm, node, next1, 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, next0, bi0); - vlib_set_next_frame_buffer (vm, node, next1, bi1); - if (next0 == next1) - { - vlib_put_next_frame (vm, node, next_index, - n_left_to_next); - next_index = next1; - 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; - snap_header_t *h0; - snap_protocol_info_t *pi0; - u8 next0, is_ethernet0, len0; - u32 oui0; - - 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); - - oui0 = snap_header_get_oui (h0); - - is_ethernet0 = oui0 == IEEE_OUI_ethernet; - - len0 = sizeof (h0[0]) - (is_ethernet0 ? sizeof (h0->protocol) : 0); - - b0->current_data += len0; - - b0->current_length -= len0; - - pi0 = snap_get_protocol_info (sm, h0); - - next0 = pi0 ? pi0->next_index : SNAP_INPUT_NEXT_DROP; - - next0 = is_ethernet0 ? SNAP_INPUT_NEXT_ETHERNET_TYPE : next0; - - /* In case of error. */ - b0->error = node->errors[SNAP_ERROR_UNKNOWN_PROTOCOL]; - - /* Sent packet to wrong next? */ - if (PREDICT_FALSE (next0 != next_index)) - { - /* Return old frame; remove incorrectly enqueued packet. */ - vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1); - - /* Send to correct next. */ - next_index = next0; - 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 *snap_error_strings[] = { -#define _(f,s) s, - foreach_snap_error -#undef _ -}; - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (snap_input_node) = { - .function = snap_input, - .name = "snap-input", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - - .n_errors = SNAP_N_ERROR, - .error_strings = snap_error_strings, - - .n_next_nodes = SNAP_INPUT_N_NEXT, - .next_nodes = { - [SNAP_INPUT_NEXT_DROP] = "error-drop", - [SNAP_INPUT_NEXT_PUNT] = "error-punt", - [SNAP_INPUT_NEXT_ETHERNET_TYPE] = "ethernet-input-type", - }, - - .format_buffer = format_snap_header_with_length, - .format_trace = format_snap_input_trace, - .unformat_buffer = unformat_snap_header, -}; -/* *INDENT-ON* */ - -static clib_error_t * -snap_input_init (vlib_main_t * vm) -{ - { - clib_error_t *error = vlib_call_init_function (vm, snap_init); - if (error) - clib_error_report (error); - } - - snap_setup_node (vm, snap_input_node.index); - - llc_register_input_protocol (vm, LLC_PROTOCOL_snap, snap_input_node.index); - - return 0; -} - -VLIB_INIT_FUNCTION (snap_input_init); - -void -snap_register_input_protocol (vlib_main_t * vm, - char *name, - u32 ieee_oui, u16 protocol, u32 node_index) -{ - snap_main_t *sm = &snap_main; - snap_protocol_info_t *pi; - snap_header_t h; - snap_oui_and_protocol_t key; - - { - clib_error_t *error = vlib_call_init_function (vm, snap_input_init); - if (error) - clib_error_report (error); - } - - h.protocol = clib_host_to_net_u16 (protocol); - h.oui[0] = (ieee_oui >> 16) & 0xff; - h.oui[1] = (ieee_oui >> 8) & 0xff; - h.oui[2] = (ieee_oui >> 0) & 0xff; - pi = snap_get_protocol_info (sm, &h); - if (pi) - return; - - vec_add2 (sm->protocols, pi, 1); - - pi->name = format (0, "%s", name); - pi->node_index = node_index; - pi->next_index = vlib_node_add_next (vm, snap_input_node.index, node_index); - - key.oui = ieee_oui; - key.protocol = clib_host_to_net_u16 (protocol); - - mhash_set (&sm->protocol_hash, &key, pi - sm->protocols, /* old_value */ 0); - hash_set_mem (sm->protocol_info_by_name, name, pi - sm->protocols); -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |