+++ /dev/null
-/*
- * 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.
- */
-/*
- * ip/ip6_input.c: IP v6 input node
- *
- * Copyright (c) 2008 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 <vnet/ip/ip.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/ppp/ppp.h>
-#include <vnet/hdlc/hdlc.h>
-
-typedef struct
-{
- u8 packet_data[64];
-} ip6_input_trace_t;
-
-static u8 *
-format_ip6_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 *);
- ip6_input_trace_t *t = va_arg (*va, ip6_input_trace_t *);
-
- s = format (s, "%U",
- format_ip6_header, t->packet_data, sizeof (t->packet_data));
-
- return s;
-}
-
-typedef enum
-{
- IP6_INPUT_NEXT_DROP,
- IP6_INPUT_NEXT_LOOKUP,
- IP6_INPUT_NEXT_ICMP_ERROR,
- IP6_INPUT_N_NEXT,
-} ip6_input_next_t;
-
-/* Validate IP v6 packets and pass them either to forwarding code
- or drop exception packets. */
-static uword
-ip6_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- vnet_main_t *vnm = vnet_get_main ();
- ip6_main_t *im = &ip6_main;
- ip_lookup_main_t *lm = &im->lookup_main;
- u32 n_left_from, *from, *to_next;
- ip6_input_next_t next_index;
- vlib_node_runtime_t *error_node =
- vlib_node_get_runtime (vm, ip6_input_node.index);
- vlib_simple_counter_main_t *cm;
- u32 cpu_index = os_get_cpu_number ();
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- if (node->flags & VLIB_NODE_FLAG_TRACE)
- vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
- /* stride */ 1,
- sizeof (ip6_input_trace_t));
-
- cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
- VNET_INTERFACE_COUNTER_IP6);
-
- 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)
- {
- vlib_buffer_t *p0, *p1;
- ip6_header_t *ip0, *ip1;
- u32 pi0, sw_if_index0, next0 = 0;
- u32 pi1, sw_if_index1, next1 = 0;
- u8 error0, error1, arc0, arc1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
- CLIB_PREFETCH (p3->data, sizeof (ip1[0]), LOAD);
- }
-
- pi0 = from[0];
- pi1 = from[1];
-
- to_next[0] = pi0;
- to_next[1] = pi1;
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- p0 = vlib_get_buffer (vm, pi0);
- p1 = vlib_get_buffer (vm, pi1);
-
- ip0 = vlib_buffer_get_current (p0);
- ip1 = vlib_buffer_get_current (p1);
-
- sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
- sw_if_index1 = vnet_buffer (p1)->sw_if_index[VLIB_RX];
-
- arc0 =
- ip6_address_is_multicast (&ip0->dst_address) ?
- lm->mcast_feature_arc_index : lm->ucast_feature_arc_index;
- arc1 =
- ip6_address_is_multicast (&ip1->dst_address) ?
- lm->mcast_feature_arc_index : lm->ucast_feature_arc_index;
-
- vnet_buffer (p0)->ip.adj_index[VLIB_RX] = ~0;
- vnet_buffer (p1)->ip.adj_index[VLIB_RX] = ~0;
-
- vnet_feature_arc_start (arc0, sw_if_index0, &next0, p0);
- vnet_feature_arc_start (arc1, sw_if_index1, &next1, p1);
-
- vlib_increment_simple_counter (cm, cpu_index, sw_if_index0, 1);
- vlib_increment_simple_counter (cm, cpu_index, sw_if_index1, 1);
-
- error0 = error1 = IP6_ERROR_NONE;
-
- /* Version != 6? Drop it. */
- error0 =
- (clib_net_to_host_u32
- (ip0->ip_version_traffic_class_and_flow_label) >> 28) !=
- 6 ? IP6_ERROR_VERSION : error0;
- error1 =
- (clib_net_to_host_u32
- (ip1->ip_version_traffic_class_and_flow_label) >> 28) !=
- 6 ? IP6_ERROR_VERSION : error1;
-
- /* hop limit < 1? Drop it. for link-local broadcast packets,
- * like dhcpv6 packets from client has hop-limit 1, which should not
- * be dropped.
- */
- error0 = ip0->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error0;
- error1 = ip1->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error1;
-
- /* L2 length must be at least minimal IP header. */
- error0 =
- p0->current_length <
- sizeof (ip0[0]) ? IP6_ERROR_TOO_SHORT : error0;
- error1 =
- p1->current_length <
- sizeof (ip1[0]) ? IP6_ERROR_TOO_SHORT : error1;
-
- if (PREDICT_FALSE (error0 != IP6_ERROR_NONE))
- {
- if (error0 == IP6_ERROR_TIME_EXPIRED)
- {
- icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
- ICMP6_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = IP6_INPUT_NEXT_ICMP_ERROR;
- }
- else
- {
- next0 = IP6_INPUT_NEXT_DROP;
- }
- }
- if (PREDICT_FALSE (error1 != IP6_ERROR_NONE))
- {
- if (error1 == IP6_ERROR_TIME_EXPIRED)
- {
- icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
- ICMP6_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = IP6_INPUT_NEXT_ICMP_ERROR;
- }
- else
- {
- next1 = IP6_INPUT_NEXT_DROP;
- }
- }
-
- p0->error = error_node->errors[error0];
- p1->error = error_node->errors[error1];
-
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0, pi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- vlib_buffer_t *p0;
- ip6_header_t *ip0;
- u32 pi0, sw_if_index0, next0 = 0;
- u8 error0, arc0;
-
- pi0 = from[0];
- to_next[0] = pi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- p0 = vlib_get_buffer (vm, pi0);
- ip0 = vlib_buffer_get_current (p0);
-
- sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
- arc0 =
- ip6_address_is_multicast (&ip0->dst_address) ?
- lm->mcast_feature_arc_index : lm->ucast_feature_arc_index;
- vnet_buffer (p0)->ip.adj_index[VLIB_RX] = ~0;
- vnet_feature_arc_start (arc0, sw_if_index0, &next0, p0);
-
- vlib_increment_simple_counter (cm, cpu_index, sw_if_index0, 1);
- error0 = IP6_ERROR_NONE;
-
- /* Version != 6? Drop it. */
- error0 =
- (clib_net_to_host_u32
- (ip0->ip_version_traffic_class_and_flow_label) >> 28) !=
- 6 ? IP6_ERROR_VERSION : error0;
-
- /* hop limit < 1? Drop it. for link-local broadcast packets,
- * like dhcpv6 packets from client has hop-limit 1, which should not
- * be dropped.
- */
- error0 = ip0->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error0;
-
- /* L2 length must be at least minimal IP header. */
- error0 =
- p0->current_length <
- sizeof (ip0[0]) ? IP6_ERROR_TOO_SHORT : error0;
-
- if (PREDICT_FALSE (error0 != IP6_ERROR_NONE))
- {
- if (error0 == IP6_ERROR_TIME_EXPIRED)
- {
- icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
- ICMP6_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = IP6_INPUT_NEXT_ICMP_ERROR;
- }
- else
- {
- next0 = IP6_INPUT_NEXT_DROP;
- }
- }
- p0->error = error_node->errors[error0];
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-static char *ip6_error_strings[] = {
-#define _(sym,string) string,
- foreach_ip6_error
-#undef _
-};
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ip6_input_node) = {
- .function = ip6_input,
- .name = "ip6-input",
- .vector_size = sizeof (u32),
-
- .n_errors = IP6_N_ERROR,
- .error_strings = ip6_error_strings,
-
- .n_next_nodes = IP6_INPUT_N_NEXT,
- .next_nodes = {
- [IP6_INPUT_NEXT_DROP] = "error-drop",
- [IP6_INPUT_NEXT_LOOKUP] = "ip6-lookup",
- [IP6_INPUT_NEXT_ICMP_ERROR] = "ip6-icmp-error",
- },
-
- .format_buffer = format_ip6_header,
- .format_trace = format_ip6_input_trace,
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FUNCTION_MULTIARCH (ip6_input_node, ip6_input)
- static clib_error_t *ip6_init (vlib_main_t * vm)
-{
- ethernet_register_input_type (vm, ETHERNET_TYPE_IP6, ip6_input_node.index);
- ppp_register_input_protocol (vm, PPP_PROTOCOL_ip6, ip6_input_node.index);
- hdlc_register_input_protocol (vm, HDLC_PROTOCOL_ip6, ip6_input_node.index);
-
- {
- pg_node_t *pn;
- pn = pg_get_node (ip6_input_node.index);
- pn->unformat_edit = unformat_pg_ip6_header;
- }
-
- /* Set flow hash to something non-zero. */
- ip6_main.flow_hash_seed = 0xdeadbeef;
-
- /* Default hop limit for packets we generate. */
- ip6_main.host_config.ttl = 64;
-
- return /* no error */ 0;
-}
-
-VLIB_INIT_FUNCTION (ip6_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff