diff options
| author | Chris Kuiper <ckuiper@google.com> | 2019-09-04 14:18:02 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-09-04 14:19:32 -0700 |
| commit | 7bf1d426d5f8ba5a3ddfc8f0cd73cc12e8a83c16 (patch) | |
| tree | 1308bd6e8a55d3e61e2232dea015ea13abed0c38 /pkg/tcpip/tcpip.go | |
| parent | 67a2ab1438cdccbe045143bbfaa807cf83110ebc (diff) | |
Handle subnet and broadcast addresses correctly with NIC.subnets
This also renames "subnet" to "addressRange" to avoid any more confusion with
an interface IP's subnet.
Lastly, this also removes the Stack.ContainsSubnet(..) API since it isn't used
by anyone. Plus the same information can be obtained from
Stack.NICAddressRanges().
PiperOrigin-RevId: 267229843
Diffstat (limited to 'pkg/tcpip/tcpip.go')
| -rw-r--r-- | pkg/tcpip/tcpip.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go index 05aa42c98..418e771d2 100644 --- a/pkg/tcpip/tcpip.go +++ b/pkg/tcpip/tcpip.go @@ -219,6 +219,15 @@ func (s *Subnet) Mask() AddressMask { return s.mask } +// Broadcast returns the subnet's broadcast address. +func (s *Subnet) Broadcast() Address { + addr := []byte(s.address) + for i := range addr { + addr[i] |= ^s.mask[i] + } + return Address(addr) +} + // NICID is a number that uniquely identifies a NIC. type NICID int32 |