| // Copyright 2019 The gVisor Authors. |
| // |
| // 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. |
| |
| package header |
| |
| import "gvisor.dev/gvisor/pkg/tcpip" |
| |
| // NDPNeighborSolicit is an NDP Neighbor Solicitation message. It will only |
| // contain the body of an ICMPv6 packet. |
| // |
| // See RFC 4861 section 4.3 for more details. |
| type NDPNeighborSolicit []byte |
| |
| const ( |
| // NDPNSMinimumSize is the minimum size of a valid NDP Neighbor |
| // Solicitation message (body of an ICMPv6 packet). |
| NDPNSMinimumSize = 20 |
| |
| // ndpNSTargetAddessOffset is the start of the Target Address |
| // field within an NDPNeighborSolicit. |
| ndpNSTargetAddessOffset = 4 |
| |
| // ndpNSOptionsOffset is the start of the NDP options in an |
| // NDPNeighborSolicit. |
| ndpNSOptionsOffset = ndpNSTargetAddessOffset + IPv6AddressSize |
| ) |
| |
| // TargetAddress returns the value within the Target Address field. |
| func (b NDPNeighborSolicit) TargetAddress() tcpip.Address { |
| return tcpip.Address(b[ndpNSTargetAddessOffset:][:IPv6AddressSize]) |
| } |
| |
| // SetTargetAddress sets the value within the Target Address field. |
| func (b NDPNeighborSolicit) SetTargetAddress(addr tcpip.Address) { |
| copy(b[ndpNSTargetAddessOffset:][:IPv6AddressSize], addr) |
| } |
| |
| // Options returns an NDPOptions of the the options body. |
| func (b NDPNeighborSolicit) Options() NDPOptions { |
| return NDPOptions(b[ndpNSOptionsOffset:]) |
| } |