diff options
Diffstat (limited to 'pkg/tcpip/header/ndp_options.go')
| -rw-r--r-- | pkg/tcpip/header/ndp_options.go | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/pkg/tcpip/header/ndp_options.go b/pkg/tcpip/header/ndp_options.go index a2b9d7435..1ca6199ef 100644 --- a/pkg/tcpip/header/ndp_options.go +++ b/pkg/tcpip/header/ndp_options.go @@ -85,17 +85,22 @@ const ( // within an NDPPrefixInformation. ndpPrefixInformationPrefixOffset = 14 - // NDPPrefixInformationInfiniteLifetime is a value that represents - // infinity for the Valid and Preferred Lifetime fields in a NDP Prefix - // Information option. Its value is (2^32 - 1)s = 4294967295s - NDPPrefixInformationInfiniteLifetime = time.Second * 4294967295 - // lengthByteUnits is the multiplier factor for the Length field of an // NDP option. That is, the length field for NDP options is in units of // 8 octets, as per RFC 4861 section 4.6. lengthByteUnits = 8 ) +var ( + // NDPPrefixInformationInfiniteLifetime is a value that represents + // infinity for the Valid and Preferred Lifetime fields in a NDP Prefix + // Information option. Its value is (2^32 - 1)s = 4294967295s + // + // This is a variable instead of a constant so that tests can change + // this value to a smaller value. It should only be modified by tests. + NDPPrefixInformationInfiniteLifetime = time.Second * 4294967295 +) + // NDPOptionIterator is an iterator of NDPOption. // // Note, between when an NDPOptionIterator is obtained and last used, no changes @@ -461,3 +466,13 @@ func (o NDPPrefixInformation) PreferredLifetime() time.Duration { func (o NDPPrefixInformation) Prefix() tcpip.Address { return tcpip.Address(o[ndpPrefixInformationPrefixOffset:][:IPv6AddressSize]) } + +// Subnet returns the Prefix field and Prefix Length field represented in a +// tcpip.Subnet. +func (o NDPPrefixInformation) Subnet() tcpip.Subnet { + addrWithPrefix := tcpip.AddressWithPrefix{ + Address: o.Prefix(), + PrefixLen: int(o.PrefixLength()), + } + return addrWithPrefix.Subnet() +} |