diff options
author | Fabricio Voznika <fvoznika@google.com> | 2018-08-08 22:38:41 -0700 |
---|---|---|
committer | Shentubot <shentubot@google.com> | 2018-08-08 22:39:58 -0700 |
commit | 4e171f7590284c1f4cedf90c92204873961b2e97 (patch) | |
tree | 98fef86694288ce258985ce7ff4772ee23566874 /pkg/tcpip | |
parent | 48b5b35b2bd46ecd043f95d5f470da71046af760 (diff) |
Basic support for ip link/addr and ifconfig
Closes #94
PiperOrigin-RevId: 207997580
Change-Id: I19b426f1586b5ec12f8b0cd5884d5b401d334924
Diffstat (limited to 'pkg/tcpip')
-rw-r--r-- | pkg/tcpip/link/loopback/loopback.go | 2 | ||||
-rw-r--r-- | pkg/tcpip/stack/nic.go | 7 | ||||
-rw-r--r-- | pkg/tcpip/stack/registration.go | 1 | ||||
-rw-r--r-- | pkg/tcpip/stack/stack.go | 36 |
4 files changed, 25 insertions, 21 deletions
diff --git a/pkg/tcpip/link/loopback/loopback.go b/pkg/tcpip/link/loopback/loopback.go index b4dc4833c..015275721 100644 --- a/pkg/tcpip/link/loopback/loopback.go +++ b/pkg/tcpip/link/loopback/loopback.go @@ -56,7 +56,7 @@ func (*endpoint) MTU() uint32 { // Capabilities implements stack.LinkEndpoint.Capabilities. Loopback advertises // itself as supporting checksum offload, but in reality it's just omitted. func (*endpoint) Capabilities() stack.LinkEndpointCapabilities { - return stack.CapabilityChecksumOffload | stack.CapabilitySaveRestore + return stack.CapabilityChecksumOffload | stack.CapabilitySaveRestore | stack.CapabilityLoopback } // MaxHeaderLength implements stack.LinkEndpoint.MaxHeaderLength. Given that the diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index c1480f97b..592006a32 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -67,6 +67,13 @@ func (n *NIC) setPromiscuousMode(enable bool) { n.mu.Unlock() } +func (n *NIC) isPromiscuousMode() bool { + n.mu.RLock() + rv := n.promiscuous + n.mu.RUnlock() + return rv +} + // setSpoofing enables or disables address spoofing. func (n *NIC) setSpoofing(enable bool) { n.mu.Lock() diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go index 01a29689d..bbe887144 100644 --- a/pkg/tcpip/stack/registration.go +++ b/pkg/tcpip/stack/registration.go @@ -205,6 +205,7 @@ const ( CapabilityResolutionRequired CapabilitySaveRestore CapabilityDisconnectOk + CapabilityLoopback ) // LinkEndpoint is the interface implemented by data link layer protocols (e.g., diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go index 6c4aa7cc5..e2b9dc2c0 100644 --- a/pkg/tcpip/stack/stack.go +++ b/pkg/tcpip/stack/stack.go @@ -563,6 +563,12 @@ type NICInfo struct { Name string LinkAddress tcpip.LinkAddress ProtocolAddresses []tcpip.ProtocolAddress + + // Flags indicate the state of the NIC. + Flags NICStateFlags + + // MTU is the maximum transmission unit. + MTU uint32 } // NICInfo returns a map of NICIDs to their associated information. @@ -572,10 +578,18 @@ func (s *Stack) NICInfo() map[tcpip.NICID]NICInfo { nics := make(map[tcpip.NICID]NICInfo) for id, nic := range s.nics { + flags := NICStateFlags{ + Up: true, // Netstack interfaces are always up. + Running: nic.linkEP.IsAttached(), + Promiscuous: nic.isPromiscuousMode(), + Loopback: nic.linkEP.Capabilities()&CapabilityLoopback != 0, + } nics[id] = NICInfo{ Name: nic.name, LinkAddress: nic.linkEP.LinkAddress(), ProtocolAddresses: nic.Addresses(), + Flags: flags, + MTU: nic.linkEP.MTU(), } } return nics @@ -591,27 +605,9 @@ type NICStateFlags struct { // Promiscuous indicates whether the interface is in promiscuous mode. Promiscuous bool -} - -// NICFlags returns flags about the state of the NIC. It returns an error if -// the NIC corresponding to id cannot be found. -func (s *Stack) NICFlags(id tcpip.NICID) (NICStateFlags, *tcpip.Error) { - s.mu.RLock() - defer s.mu.RUnlock() - nic := s.nics[id] - if nic == nil { - return NICStateFlags{}, tcpip.ErrUnknownNICID - } - - ret := NICStateFlags{ - // Netstack interfaces are always up. - Up: true, - - Running: nic.linkEP.IsAttached(), - Promiscuous: nic.promiscuous, - } - return ret, nil + // Loopback indicates whether the interface is a loopback. + Loopback bool } // AddAddress adds a new network-layer address to the specified NIC. |