gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/tcpip/header/ndp_router_solicit.go (about)

     1  // Copyright 2019 The gVisor Authors.
     2  //
     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
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     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.
    14  
    15  package header
    16  
    17  // NDPRouterSolicit is an NDP Router Solicitation message. It will only contain
    18  // the body of an ICMPv6 packet.
    19  //
    20  // See RFC 4861 section 4.1 for more details.
    21  type NDPRouterSolicit []byte
    22  
    23  const (
    24  	// NDPRSMinimumSize is the minimum size of a valid NDP Router
    25  	// Solicitation message (body of an ICMPv6 packet).
    26  	NDPRSMinimumSize = 4
    27  
    28  	// ndpRSOptionsOffset is the start of the NDP options in an
    29  	// NDPRouterSolicit.
    30  	ndpRSOptionsOffset = 4
    31  )
    32  
    33  // Options returns an NDPOptions of the options body.
    34  func (b NDPRouterSolicit) Options() NDPOptions {
    35  	return NDPOptions(b[ndpRSOptionsOffset:])
    36  }