2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ip/ip6_input.c: IP v6 input node
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/ip/ip6_input.h>
41 #include <vnet/ethernet/ethernet.h>
42 #include <vnet/ppp/ppp.h>
43 #include <vnet/hdlc/hdlc.h>
51 format_ip6_input_trace (u8 * s, va_list * va)
53 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
54 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
55 ip6_input_trace_t *t = va_arg (*va, ip6_input_trace_t *);
58 format_ip6_header, t->packet_data, sizeof (t->packet_data));
63 /* Validate IP v6 packets and pass them either to forwarding code
64 or drop exception packets. */
66 ip6_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
68 vnet_main_t *vnm = vnet_get_main ();
69 ip6_main_t *im = &ip6_main;
70 ip_lookup_main_t *lm = &im->lookup_main;
71 u32 n_left_from, *from, *to_next;
72 ip6_input_next_t next_index;
73 vlib_node_runtime_t *error_node =
74 vlib_node_get_runtime (vm, ip6_input_node.index);
75 vlib_simple_counter_main_t *cm;
76 u32 thread_index = vm->thread_index;
78 from = vlib_frame_vector_args (frame);
79 n_left_from = frame->n_vectors;
80 next_index = node->cached_next_index;
82 if (node->flags & VLIB_NODE_FLAG_TRACE)
83 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
85 sizeof (ip6_input_trace_t));
87 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
88 VNET_INTERFACE_COUNTER_IP6);
90 while (n_left_from > 0)
94 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
96 while (n_left_from >= 4 && n_left_to_next >= 2)
98 vlib_buffer_t *p0, *p1;
99 ip6_header_t *ip0, *ip1;
100 u32 pi0, sw_if_index0, next0 = 0;
101 u32 pi1, sw_if_index1, next1 = 0;
104 /* Prefetch next iteration. */
106 vlib_buffer_t *p2, *p3;
108 p2 = vlib_get_buffer (vm, from[2]);
109 p3 = vlib_get_buffer (vm, from[3]);
111 vlib_prefetch_buffer_header (p2, LOAD);
112 vlib_prefetch_buffer_header (p3, LOAD);
114 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
115 CLIB_PREFETCH (p3->data, sizeof (ip1[0]), LOAD);
128 p0 = vlib_get_buffer (vm, pi0);
129 p1 = vlib_get_buffer (vm, pi1);
131 ip0 = vlib_buffer_get_current (p0);
132 ip1 = vlib_buffer_get_current (p1);
134 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
135 sw_if_index1 = vnet_buffer (p1)->sw_if_index[VLIB_RX];
137 if (PREDICT_FALSE (ip6_address_is_multicast (&ip0->dst_address)))
139 arc0 = lm->mcast_feature_arc_index;
140 next0 = IP6_INPUT_NEXT_LOOKUP_MULTICAST;
144 arc0 = lm->ucast_feature_arc_index;
145 next0 = IP6_INPUT_NEXT_LOOKUP;
148 if (PREDICT_FALSE (ip6_address_is_multicast (&ip1->dst_address)))
150 arc1 = lm->mcast_feature_arc_index;
151 next1 = IP6_INPUT_NEXT_LOOKUP_MULTICAST;
155 arc1 = lm->ucast_feature_arc_index;
156 next1 = IP6_INPUT_NEXT_LOOKUP;
159 vnet_buffer (p0)->ip.adj_index[VLIB_RX] = ~0;
160 vnet_buffer (p1)->ip.adj_index[VLIB_RX] = ~0;
162 vnet_feature_arc_start (arc0, sw_if_index0, &next0, p0);
163 vnet_feature_arc_start (arc1, sw_if_index1, &next1, p1);
165 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
166 vlib_increment_simple_counter (cm, thread_index, sw_if_index1, 1);
167 ip6_input_check_x2 (vm, error_node,
168 p0, p1, ip0, ip1, &next0, &next1);
170 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
171 to_next, n_left_to_next,
172 pi0, pi1, next0, next1);
175 while (n_left_from > 0 && n_left_to_next > 0)
179 u32 pi0, sw_if_index0, next0 = 0;
189 p0 = vlib_get_buffer (vm, pi0);
190 ip0 = vlib_buffer_get_current (p0);
192 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
193 if (PREDICT_FALSE (ip6_address_is_multicast (&ip0->dst_address)))
195 arc0 = lm->mcast_feature_arc_index;
196 next0 = IP6_INPUT_NEXT_LOOKUP_MULTICAST;
200 arc0 = lm->ucast_feature_arc_index;
201 next0 = IP6_INPUT_NEXT_LOOKUP;
204 vnet_buffer (p0)->ip.adj_index[VLIB_RX] = ~0;
205 vnet_feature_arc_start (arc0, sw_if_index0, &next0, p0);
207 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
208 ip6_input_check_x1 (vm, error_node, p0, ip0, &next0);
210 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
211 to_next, n_left_to_next,
215 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
218 return frame->n_vectors;
221 char *ip6_error_strings[] = {
222 #define _(sym,string) string,
228 VLIB_REGISTER_NODE (ip6_input_node) = {
229 .function = ip6_input,
231 .vector_size = sizeof (u32),
233 .n_errors = IP6_N_ERROR,
234 .error_strings = ip6_error_strings,
236 .n_next_nodes = IP6_INPUT_N_NEXT,
238 [IP6_INPUT_NEXT_DROP] = "error-drop",
239 [IP6_INPUT_NEXT_LOOKUP] = "ip6-lookup",
240 [IP6_INPUT_NEXT_ICMP_ERROR] = "ip6-icmp-error",
241 [IP6_INPUT_NEXT_LOOKUP_MULTICAST] = "ip6-mfib-forward-lookup",
244 .format_buffer = format_ip6_header,
245 .format_trace = format_ip6_input_trace,
249 VLIB_NODE_FUNCTION_MULTIARCH (ip6_input_node, ip6_input);
251 static clib_error_t *
252 ip6_init (vlib_main_t * vm)
254 ethernet_register_input_type (vm, ETHERNET_TYPE_IP6, ip6_input_node.index);
255 ppp_register_input_protocol (vm, PPP_PROTOCOL_ip6, ip6_input_node.index);
256 hdlc_register_input_protocol (vm, HDLC_PROTOCOL_ip6, ip6_input_node.index);
260 pn = pg_get_node (ip6_input_node.index);
261 pn->unformat_edit = unformat_pg_ip6_header;
264 /* Set flow hash to something non-zero. */
265 ip6_main.flow_hash_seed = 0xdeadbeef;
267 /* Default hop limit for packets we generate. */
268 ip6_main.host_config.ttl = 64;
270 return /* no error */ 0;
273 VLIB_INIT_FUNCTION (ip6_init);
275 static clib_error_t *
276 ip6_main_loop_enter (vlib_main_t * vm)
278 ip6_main_t *im = &ip6_main;
279 vlib_thread_main_t *tm = &vlib_thread_main;
281 throttle_init (&im->nd_throttle, tm->n_vlib_mains, 1e-3);
286 VLIB_MAIN_LOOP_ENTER_FUNCTION (ip6_main_loop_enter);
289 * fd.io coding-style-patch-verification: ON
292 * eval: (c-set-style "gnu")