ipv6_constants.h

00001 /*
00002  * Copyright (c) 2013-2017, Arm Limited and affiliates.
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 
00018 #ifndef IPV6_CONSTANTS_H_
00019 #define IPV6_CONSTANTS_H_
00020 
00021 #define IPV6_MIN_LINK_MTU   1280    /* All links can transfer 1280-octet IP packets */
00022 #define IPV6_MIN_FRAG_MRU   1500    /* All hosts can receive 1500-octet fragmented datagrams */
00023 
00024 /*
00025  * IPv6 header offsets
00026  */
00027 #define IPV6_HDROFF_FLOW_LABEL      1
00028 #define IPV6_HDROFF_PAYLOAD_LENGTH  4
00029 #define IPV6_HDROFF_NH              6
00030 #define IPV6_HDROFF_HOP_LIMIT       7
00031 #define IPV6_HDROFF_SRC_ADDR        8
00032 #define IPV6_HDROFF_DST_ADDR        24
00033 #define IPV6_HDRLEN                 40
00034 
00035 /*
00036  * Standard IPv6 Next Header numbers
00037  */
00038 #define IPV6_NH_HOP_BY_HOP  0
00039 #define IPV6_NH_TCP         6
00040 #define IPV6_NH_UDP         17
00041 #define IPV6_NH_IPV6        41
00042 #define IPV6_NH_ROUTING     43
00043 #define IPV6_NH_FRAGMENT    44
00044 #define IPV6_NH_AUTH        51
00045 #define IPV6_NH_MOBILITY    55
00046 #define IPV6_NH_ICMPV6      58
00047 #define IPV6_NH_NONE        59
00048 #define IPV6_NH_DEST_OPT    60
00049 #define IPV6_NH_HIP         139
00050 #define IPV6_NH_SHIM6       140
00051 
00052 /* Options in IPv6 Destination/Hop-by-Hop Options Headers */
00053 #define IPV6_OPTION_PAD1            0x00 /* (skip, does not change en-route) */
00054 #define IPV6_OPTION_PADN            0x01 /* (skip, does not change en-route) */
00055 #define IPV6_OPTION_ROUTER_ALERT    0x05 /* (skip, does not change en-route) */
00056 #define IPV6_OPTION_RPL             0x63 /* (discard, may change en-route) */
00057 #define IPV6_OPTION_MPL             0x6D /* (discard, may change en-route) */
00058 #define IPV6_OPTION_MPL_EXP         0x7E /* (discard, may change en-route) */
00059 
00060 /* Encoded bits in IPv6 Option numbers; action if unrecognised, and mutability */
00061 #define IPV6_OPTION_ACTION_MASK             0xC0
00062 #define IPV6_OPTION_ACTION_SKIP             0x00    /* ignore unrecognised */
00063 #define IPV6_OPTION_ACTION_DISCARD          0x40    /* discard packet */
00064 #define IPV6_OPTION_ACTION_ERROR            0x80    /* discard, and send ICMP Parameter Problem */
00065 #define IPV6_OPTION_ACTION_ERROR_UNICAST    0xC0    /* discard, and send ICMP Parameter Problem if unicast dst */
00066 
00067 #define IPV6_OPTION_CHANGE_MASK             0x20
00068 #define IPV6_OPTION_CHANGE_DOES_NOT         0x00    /* does not change en-route */
00069 #define IPV6_OPTION_CHANGE_MAY              0x20    /* may change en-route */
00070 
00071 /* Routing Types */
00072 #define IPV6_ROUTING_TYPE_RPL               3
00073 
00074 /* Scope values (RFC 7346) */
00075 #define IPV6_SCOPE_INTERFACE_LOCAL          0x1
00076 #define IPV6_SCOPE_LINK_LOCAL               0x2
00077 #define IPV6_SCOPE_REALM_LOCAL              0x3
00078 #define IPV6_SCOPE_ADMIN_LOCAL              0x4
00079 #define IPV6_SCOPE_SITE_LOCAL               0x5
00080 #define IPV6_SCOPE_ORGANIZATION_LOCAL       0x8
00081 #define IPV6_SCOPE_GLOBAL                   0xE
00082 
00083 /* Router Alert values (RFC 2711) */
00084 #define IPV6_ROUTER_ALERT_MLD               0
00085 
00086 
00087 
00088 #endif /* IPV6_CONSTANTS_H_ */