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>
45 extern char *ip6_error_strings[];
50 IP6_INPUT_NEXT_LOOKUP,
51 IP6_INPUT_NEXT_LOOKUP_MULTICAST,
52 IP6_INPUT_NEXT_ICMP_ERROR,
57 ip6_input_check_x2 (vlib_main_t * vm,
58 vlib_node_runtime_t * error_node,
59 vlib_buffer_t * p0, vlib_buffer_t * p1,
60 ip6_header_t * ip0, ip6_header_t * ip1,
61 u32 * next0, u32 * next1)
65 error0 = error1 = IP6_ERROR_NONE;
67 /* Version != 6? Drop it. */
70 (ip0->ip_version_traffic_class_and_flow_label) >> 28) !=
71 6 ? IP6_ERROR_VERSION : error0;
74 (ip1->ip_version_traffic_class_and_flow_label) >> 28) !=
75 6 ? IP6_ERROR_VERSION : error1;
77 /* hop limit < 1? Drop it. for link-local broadcast packets,
78 * like dhcpv6 packets from client has hop-limit 1, which should not
81 error0 = ip0->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error0;
82 error1 = ip1->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error1;
84 /* L2 length must be at least minimal IP header. */
86 p0->current_length < sizeof (ip0[0]) ? IP6_ERROR_TOO_SHORT : error0;
88 p1->current_length < sizeof (ip1[0]) ? IP6_ERROR_TOO_SHORT : error1;
90 if (PREDICT_FALSE (error0 != IP6_ERROR_NONE))
92 if (error0 == IP6_ERROR_TIME_EXPIRED)
94 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
95 ICMP6_time_exceeded_ttl_exceeded_in_transit,
97 *next0 = IP6_INPUT_NEXT_ICMP_ERROR;
101 *next0 = IP6_INPUT_NEXT_DROP;
104 if (PREDICT_FALSE (error1 != IP6_ERROR_NONE))
106 if (error1 == IP6_ERROR_TIME_EXPIRED)
108 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
109 ICMP6_time_exceeded_ttl_exceeded_in_transit,
111 *next1 = IP6_INPUT_NEXT_ICMP_ERROR;
115 *next1 = IP6_INPUT_NEXT_DROP;
121 ip6_input_check_x1 (vlib_main_t * vm,
122 vlib_node_runtime_t * error_node,
123 vlib_buffer_t * p0, ip6_header_t * ip0, u32 * next0)
127 error0 = IP6_ERROR_NONE;
129 /* Version != 6? Drop it. */
131 (clib_net_to_host_u32
132 (ip0->ip_version_traffic_class_and_flow_label) >> 28) !=
133 6 ? IP6_ERROR_VERSION : error0;
135 /* hop limit < 1? Drop it. for link-local broadcast packets,
136 * like dhcpv6 packets from client has hop-limit 1, which should not
139 error0 = ip0->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error0;
141 /* L2 length must be at least minimal IP header. */
143 p0->current_length < sizeof (ip0[0]) ? IP6_ERROR_TOO_SHORT : error0;
145 if (PREDICT_FALSE (error0 != IP6_ERROR_NONE))
147 if (error0 == IP6_ERROR_TIME_EXPIRED)
149 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
150 ICMP6_time_exceeded_ttl_exceeded_in_transit,
152 *next0 = IP6_INPUT_NEXT_ICMP_ERROR;
156 *next0 = IP6_INPUT_NEXT_DROP;
164 * fd.io coding-style-patch-verification: ON
167 * eval: (c-set-style "gnu")