diff options
Diffstat (limited to 'pkg/tcpip/stack/registration.go')
| -rw-r--r-- | pkg/tcpip/stack/registration.go | 53 |
1 files changed, 21 insertions, 32 deletions
diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go index 43ca03ada..7e83b7fbb 100644 --- a/pkg/tcpip/stack/registration.go +++ b/pkg/tcpip/stack/registration.go @@ -17,7 +17,6 @@ package stack import ( "fmt" - "gvisor.dev/gvisor/pkg/sleep" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/header" @@ -259,15 +258,6 @@ const ( PacketLoop ) -// NetOptions is an interface that allows us to pass network protocol specific -// options through the Stack layer code. -type NetOptions interface { - // SizeWithPadding returns the amount of memory that must be allocated to - // hold the options given that the value must be rounded up to the next - // multiple of 4 bytes. - SizeWithPadding() int -} - // NetworkHeaderParams are the header parameters given as input by the // transport endpoint to the network. type NetworkHeaderParams struct { @@ -279,10 +269,6 @@ type NetworkHeaderParams struct { // TOS refers to TypeOfService or TrafficClass field of the IP-header. TOS uint8 - - // Options is a set of options to add to a network header (or nil). - // It will be protocol specific opaque information from higher layers. - Options NetOptions } // GroupAddressableEndpoint is an endpoint that supports group addressing. @@ -291,14 +277,10 @@ type NetworkHeaderParams struct { // endpoints may associate themselves with the same identifier (group address). type GroupAddressableEndpoint interface { // JoinGroup joins the specified group. - // - // Returns true if the group was newly joined. - JoinGroup(group tcpip.Address) (bool, *tcpip.Error) + JoinGroup(group tcpip.Address) *tcpip.Error // LeaveGroup attempts to leave the specified group. - // - // Returns tcpip.ErrBadLocalAddress if the endpoint has not joined the group. - LeaveGroup(group tcpip.Address) (bool, *tcpip.Error) + LeaveGroup(group tcpip.Address) *tcpip.Error // IsInGroup returns true if the endpoint is a member of the specified group. IsInGroup(group tcpip.Address) bool @@ -816,19 +798,26 @@ type LinkAddressCache interface { // AddLinkAddress adds a link address to the cache. AddLinkAddress(nicID tcpip.NICID, addr tcpip.Address, linkAddr tcpip.LinkAddress) - // GetLinkAddress looks up the cache to translate address to link address (e.g. IP -> MAC). - // If the LinkEndpoint requests address resolution and there is a LinkAddressResolver - // registered with the network protocol, the cache attempts to resolve the address - // and returns ErrWouldBlock. Waker is notified when address resolution is - // complete (success or not). + // GetLinkAddress finds the link address corresponding to the remote address + // (e.g. IP -> MAC). // - // If address resolution is required, ErrNoLinkAddress and a notification channel is - // returned for the top level caller to block. Channel is closed once address resolution - // is complete (success or not). - GetLinkAddress(nicID tcpip.NICID, addr, localAddr tcpip.Address, protocol tcpip.NetworkProtocolNumber, w *sleep.Waker) (tcpip.LinkAddress, <-chan struct{}, *tcpip.Error) - - // RemoveWaker removes a waker that has been added in GetLinkAddress(). - RemoveWaker(nicID tcpip.NICID, addr tcpip.Address, waker *sleep.Waker) + // Returns a link address for the remote address, if readily available. + // + // Returns ErrWouldBlock if the link address is not readily available, along + // with a notification channel for the caller to block on. Triggers address + // resolution asynchronously. + // + // If onResolve is provided, it will be called either immediately, if + // resolution is not required, or when address resolution is complete, with + // the resolved link address and whether resolution succeeded. After any + // callbacks have been called, the returned notification channel is closed. + // + // If specified, the local address must be an address local to the interface + // the neighbor cache belongs to. The local address is the source address of + // a packet prompting NUD/link address resolution. + // + // TODO(gvisor.dev/issue/5151): Don't return the link address. + GetLinkAddress(nicID tcpip.NICID, addr, localAddr tcpip.Address, protocol tcpip.NetworkProtocolNumber, onResolve func(tcpip.LinkAddress, bool)) (tcpip.LinkAddress, <-chan struct{}, *tcpip.Error) } // RawFactory produces endpoints for writing various types of raw packets. |