2 * Copyright (c) 2017 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 #ifndef included_ip6_input_h
41 #define included_ip6_input_h
43 #include <vnet/ip/ip.h>
44 #include <vnet/ip/icmp6.h>
46 extern char *ip6_error_strings[];
51 IP6_INPUT_NEXT_LOOKUP,
52 IP6_INPUT_NEXT_LOOKUP_MULTICAST,
53 IP6_INPUT_NEXT_ICMP_ERROR,
58 ip6_input_check_x2 (vlib_main_t * vm,
59 vlib_node_runtime_t * error_node,
60 vlib_buffer_t * p0, vlib_buffer_t * p1,
61 ip6_header_t * ip0, ip6_header_t * ip1,
62 u32 * next0, u32 * next1)
66 error0 = error1 = IP6_ERROR_NONE;
68 /* Version != 6? Drop it. */
71 (ip0->ip_version_traffic_class_and_flow_label) >> 28) !=
72 6 ? IP6_ERROR_VERSION : error0;
75 (ip1->ip_version_traffic_class_and_flow_label) >> 28) !=
76 6 ? IP6_ERROR_VERSION : error1;
78 /* hop limit < 1? Drop it. for link-local broadcast packets,
79 * like dhcpv6 packets from client has hop-limit 1, which should not
82 error0 = ip0->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error0;
83 error1 = ip1->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error1;
85 /* L2 length must be at least minimal IP header. */
87 p0->current_length < sizeof (ip0[0]) ? IP6_ERROR_TOO_SHORT : error0;
89 p1->current_length < sizeof (ip1[0]) ? IP6_ERROR_TOO_SHORT : error1;
91 if (PREDICT_FALSE (error0 != IP6_ERROR_NONE))
93 if (error0 == IP6_ERROR_TIME_EXPIRED)
95 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
96 ICMP6_time_exceeded_ttl_exceeded_in_transit,
98 *next0 = IP6_INPUT_NEXT_ICMP_ERROR;
102 *next0 = IP6_INPUT_NEXT_DROP;
105 if (PREDICT_FALSE (error1 != IP6_ERROR_NONE))
107 if (error1 == IP6_ERROR_TIME_EXPIRED)
109 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
110 ICMP6_time_exceeded_ttl_exceeded_in_transit,
112 *next1 = IP6_INPUT_NEXT_ICMP_ERROR;
116 *next1 = IP6_INPUT_NEXT_DROP;
122 ip6_input_check_x1 (vlib_main_t * vm,
123 vlib_node_runtime_t * error_node,
124 vlib_buffer_t * p0, ip6_header_t * ip0, u32 * next0)
128 error0 = IP6_ERROR_NONE;
130 /* Version != 6? Drop it. */
132 (clib_net_to_host_u32
133 (ip0->ip_version_traffic_class_and_flow_label) >> 28) !=
134 6 ? IP6_ERROR_VERSION : error0;
136 /* hop limit < 1? Drop it. for link-local broadcast packets,
137 * like dhcpv6 packets from client has hop-limit 1, which should not
140 error0 = ip0->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error0;
142 /* L2 length must be at least minimal IP header. */
144 p0->current_length < sizeof (ip0[0]) ? IP6_ERROR_TOO_SHORT : error0;
146 if (PREDICT_FALSE (error0 != IP6_ERROR_NONE))
148 if (error0 == IP6_ERROR_TIME_EXPIRED)
150 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
151 ICMP6_time_exceeded_ttl_exceeded_in_transit,
153 *next0 = IP6_INPUT_NEXT_ICMP_ERROR;
157 *next0 = IP6_INPUT_NEXT_DROP;
165 * fd.io coding-style-patch-verification: ON
168 * eval: (c-set-style "gnu")