diff options
Diffstat (limited to 'pkg/tcpip/stack/nic.go')
| -rw-r--r-- | pkg/tcpip/stack/nic.go | 27 |
1 files changed, 11 insertions, 16 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index f6106f762..5993fe582 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -104,6 +104,16 @@ func newNIC(stack *Stack, id tcpip.NICID, name string, ep LinkEndpoint, loopback func (n *NIC) enable() *tcpip.Error { n.attachLinkEndpoint() + // Create an endpoint to receive broadcast packets on this interface. + if _, ok := n.stack.networkProtocols[header.IPv4ProtocolNumber]; ok { + if err := n.AddAddress(tcpip.ProtocolAddress{ + Protocol: header.IPv4ProtocolNumber, + AddressWithPrefix: tcpip.AddressWithPrefix{header.IPv4Broadcast, 8 * header.IPv4AddressSize}, + }, NeverPrimaryEndpoint); err != nil { + return err + } + } + // Join the IPv6 All-Nodes Multicast group if the stack is configured to // use IPv6. This is required to ensure that this node properly receives // and responds to the various NDP messages that are destined to the @@ -372,7 +382,7 @@ func (n *NIC) AllAddresses() []tcpip.ProtocolAddress { addrs := make([]tcpip.ProtocolAddress, 0, len(n.endpoints)) for nid, ref := range n.endpoints { - // Don't include expired or tempory endpoints to avoid confusion and + // Don't include expired or temporary endpoints to avoid confusion and // prevent the caller from using those. switch ref.getKind() { case permanentExpired, temporary: @@ -624,21 +634,6 @@ func (n *NIC) DeliverNetworkPacket(linkEP LinkEndpoint, remote, _ tcpip.LinkAddr n.stack.AddLinkAddress(n.id, src, remote) - // If the packet is destined to the IPv4 Broadcast address, then make a - // route to each IPv4 network endpoint and let each endpoint handle the - // packet. - if dst == header.IPv4Broadcast { - // n.endpoints is mutex protected so acquire lock. - n.mu.RLock() - for _, ref := range n.endpoints { - if ref.isValidForIncoming() && ref.protocol == header.IPv4ProtocolNumber && ref.tryIncRef() { - handlePacket(protocol, dst, src, linkEP.LinkAddress(), remote, ref, vv) - } - } - n.mu.RUnlock() - return - } - if ref := n.getRef(protocol, dst); ref != nil { handlePacket(protocol, dst, src, linkEP.LinkAddress(), remote, ref, vv) return |