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PR: naming
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Signed-off-by: Hamza El-Saawy <[email protected]>
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helsaawy committed Mar 25, 2022
1 parent 05bbdb1 commit 8c37960
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Showing 3 changed files with 15 additions and 42 deletions.
28 changes: 14 additions & 14 deletions hvsock.go
Original file line number Diff line number Diff line change
Expand Up @@ -24,58 +24,58 @@ const afHvSock = 34 // AF_HYPERV
var (
// https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/user-guide/make-integration-service#vmid-wildcards

// HVguidWildcard is the wildcard VmId for accepting connections from all partitions.
HVguidWildcard = guid.GUID{} // 00000000-0000-0000-0000-000000000000
// HvsockGUIDWildcard is the wildcard VmId for accepting connections from all partitions.
HvsockGUIDWildcard = guid.GUID{} // 00000000-0000-0000-0000-000000000000

// HVguidBroadcast is the wildcard VmId for broadcasting sends to all partitions
HVguidBroadcast = guid.GUID{ //ffffffff-ffff-ffff-ffff-ffffffffffff
// HvsockGUIDBroadcast is the wildcard VmId for broadcasting sends to all partitions
HvsockGUIDBroadcast = guid.GUID{ //ffffffff-ffff-ffff-ffff-ffffffffffff
Data1: 0xffffffff,
Data2: 0xffff,
Data3: 0xffff,
Data4: [8]uint8{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
}

// HVGUIDLoopback is the Loopback VmId for accepting connections to the same partition as the connector.
HVguidLoopback = guid.GUID{ // e0e16197-dd56-4a10-9195-5ee7a155a838
// HvsockGUIDLoopback is the Loopback VmId for accepting connections to the same partition as the connector.
HvsockGUIDLoopback = guid.GUID{ // e0e16197-dd56-4a10-9195-5ee7a155a838
Data1: 0xe0e16197,
Data2: 0xdd56,
Data3: 0x4a10,
Data4: [8]uint8{0x91, 0x95, 0x5e, 0xe7, 0xa1, 0x55, 0xa8, 0x38},
}

// HVguidSiloHost is the address of a silo's host partition:
// HvsockGUIDSiloHost is the address of a silo's host partition:
// - The silo host of a hosted silo is the utility VM.
// - The silo host of a silo on a physical host is the physical host.
HVguidSiloHost = guid.GUID{ // 36bd0c5c-7276-4223-88ba-7d03b654c568
HvsockGUIDSiloHost = guid.GUID{ // 36bd0c5c-7276-4223-88ba-7d03b654c568
Data1: 0x36bd0c5c,
Data2: 0x7276,
Data3: 0x4223,
Data4: [8]byte{0x88, 0xba, 0x7d, 0x03, 0xb6, 0x54, 0xc5, 0x68},
}

// HVguidChildren is the wildcard VmId for accepting connections from the connector's child partitions.
HVguidChildren = guid.GUID{ // 90db8b89-0d35-4f79-8ce9-49ea0ac8b7cd
// HvsockGUIDchildren is the wildcard VmId for accepting connections from the connector's child partitions.
HvsockGUIDchildren = guid.GUID{ // 90db8b89-0d35-4f79-8ce9-49ea0ac8b7cd
Data1: 0x90db8b89,
Data2: 0xd35,
Data3: 0x4f79,
Data4: [8]uint8{0x8c, 0xe9, 0x49, 0xea, 0xa, 0xc8, 0xb7, 0xcd},
}

// HVguidParent is the wildcard VmId for accepting connections from the connector's parent partition.
// HvsockGUIDParent is the wildcard VmId for accepting connections from the connector's parent partition.
// Listening on this VmId accepts connection from:
// - Inside silos: silo host partition.
// - Inside hosted silo: host of the VM.
// - Inside VM: VM host.
// - Physical host: Not supported.
HVguidParent = guid.GUID{ // a42e7cda-d03f-480c-9cc2-a4de20abb878
HvsockGUIDParent = guid.GUID{ // a42e7cda-d03f-480c-9cc2-a4de20abb878
Data1: 0xa42e7cda,
Data2: 0xd03f,
Data3: 0x480c,
Data4: [8]uint8{0x9c, 0xc2, 0xa4, 0xde, 0x20, 0xab, 0xb8, 0x78},
}

// HVguidVSockServiceGUIDTemplate is the Service GUID used for the VSOCK protocol
hvguidVSockServiceTemplate = guid.GUID{ // 00000000-facb-11e6-bd58-64006a7986d3
hvsockVsockServiceTemplate = guid.GUID{ // 00000000-facb-11e6-bd58-64006a7986d3
Data2: 0xfacb,
Data3: 0x11e6,
Data4: [8]uint8{0xbd, 0x58, 0x64, 0x00, 0x6a, 0x79, 0x86, 0xd3},
Expand Down Expand Up @@ -108,7 +108,7 @@ func (addr *HvsockAddr) String() string {

// VsockServiceID returns an hvsock service ID corresponding to the specified AF_VSOCK port.
func VsockServiceID(port uint32) guid.GUID {
g := hvguidVSockServiceTemplate // make a copy
g := hvsockVsockServiceTemplate // make a copy
g.Data1 = port
return g
}
Expand Down
28 changes: 1 addition & 27 deletions pkg/sockets/rawaddr.go
Original file line number Diff line number Diff line change
Expand Up @@ -14,33 +14,7 @@ var (
ErrAddrFamily = errors.New("address family")
)

// todo: replace this with generics
// The function calls should be:
//
// type RawSockaddrHeader {
// Family uint16
// }
//
// func ConnectEx[T ~RawSockaddrHeader] (s Handle, a *T, ...) error {
// n := unsafe.SizeOf(*a)
// r1, _, e1 := syscall.Syscall9(connectExFunc.addr, 7, uintptr(s),
// uintptr(unsafe.Pointer(a)), uintptr(n), /* ... */)
// /* ... */
// }
//
// Similarly, `GetAcceptExSockaddrs` requires a `**sockaddr`, so the syscall can change the pointer
// to data it allocates. Currently, the options are (1) dealing with pointers to the interface
// `* RawSockaddr`, use reflection or pull the pointer from the internal interface representation,
// and change where the interface points to; or (2) allocate dedicate, presized buffers based on
// `(r RawSockaddr).Sockaddr()`'s return, and pass that to `(r RawSockaddr).FromBytes()`.
// It would be safer and more readable to have:
//
// func GetAcceptExSockaddrs[L ~RawSockaddrHeader, R ~RawSockaddrHeader](
// b *byte,
// rxlen uint32,
// local **L,
// remote **R,
// ) error { /*...*/ }
// todo: replace this with generics, along with GetSockName and co.

// RawSockaddr allows structs to be used with Bind and ConnectEx. The
// struct must meet the Wind32 sockaddr requirements specified here:
Expand Down
1 change: 0 additions & 1 deletion pkg/sockets/sockets.go
Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,6 @@ type CloseReader interface {
// buffer returned by the getsockname syscall. The buffer is allocated to the size specified
// by `rsa.Sockaddr()`.
func GetSockName(s windows.Handle, rsa RawSockaddr) error {
// todo: replace this (and RawSockaddr) with generics
ptr, l, err := rsa.Sockaddr()
if err != nil {
return fmt.Errorf("could not find socket size to allocate buffer: %w", err)
Expand Down

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