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-rw-r--r--pkg/sentry/socket/unix/transport/BUILD1
-rw-r--r--pkg/sentry/socket/unix/transport/connectioned.go29
-rw-r--r--pkg/sentry/socket/unix/transport/connectionless.go20
-rw-r--r--pkg/sentry/socket/unix/transport/unix.go30
-rw-r--r--pkg/sentry/socket/unix/unix.go80
5 files changed, 101 insertions, 59 deletions
diff --git a/pkg/sentry/socket/unix/transport/BUILD b/pkg/sentry/socket/unix/transport/BUILD
index 5a2de0c4c..52f324eed 100644
--- a/pkg/sentry/socket/unix/transport/BUILD
+++ b/pkg/sentry/socket/unix/transport/BUILD
@@ -28,6 +28,7 @@ go_library(
importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport",
visibility = ["//:sandbox"],
deps = [
+ "//pkg/abi/linux",
"//pkg/ilist",
"//pkg/refs",
"//pkg/syserr",
diff --git a/pkg/sentry/socket/unix/transport/connectioned.go b/pkg/sentry/socket/unix/transport/connectioned.go
index 18e492862..db79ac904 100644
--- a/pkg/sentry/socket/unix/transport/connectioned.go
+++ b/pkg/sentry/socket/unix/transport/connectioned.go
@@ -17,6 +17,7 @@ package transport
import (
"sync"
+ "gvisor.googlesource.com/gvisor/pkg/abi/linux"
"gvisor.googlesource.com/gvisor/pkg/syserr"
"gvisor.googlesource.com/gvisor/pkg/tcpip"
"gvisor.googlesource.com/gvisor/pkg/waiter"
@@ -44,7 +45,7 @@ type ConnectingEndpoint interface {
// Type returns the socket type, typically either SockStream or
// SockSeqpacket. The connection attempt must be aborted if this
// value doesn't match the ConnectableEndpoint's type.
- Type() SockType
+ Type() linux.SockType
// GetLocalAddress returns the bound path.
GetLocalAddress() (tcpip.FullAddress, *tcpip.Error)
@@ -100,7 +101,7 @@ type connectionedEndpoint struct {
// stype is used by connecting sockets to ensure that they are the
// same type. The value is typically either tcpip.SockSeqpacket or
// tcpip.SockStream.
- stype SockType
+ stype linux.SockType
// acceptedChan is per the TCP endpoint implementation. Note that the
// sockets in this channel are _already in the connected state_, and
@@ -111,7 +112,7 @@ type connectionedEndpoint struct {
}
// NewConnectioned creates a new unbound connectionedEndpoint.
-func NewConnectioned(stype SockType, uid UniqueIDProvider) Endpoint {
+func NewConnectioned(stype linux.SockType, uid UniqueIDProvider) Endpoint {
return &connectionedEndpoint{
baseEndpoint: baseEndpoint{Queue: &waiter.Queue{}},
id: uid.UniqueID(),
@@ -121,7 +122,7 @@ func NewConnectioned(stype SockType, uid UniqueIDProvider) Endpoint {
}
// NewPair allocates a new pair of connected unix-domain connectionedEndpoints.
-func NewPair(stype SockType, uid UniqueIDProvider) (Endpoint, Endpoint) {
+func NewPair(stype linux.SockType, uid UniqueIDProvider) (Endpoint, Endpoint) {
a := &connectionedEndpoint{
baseEndpoint: baseEndpoint{Queue: &waiter.Queue{}},
id: uid.UniqueID(),
@@ -138,7 +139,7 @@ func NewPair(stype SockType, uid UniqueIDProvider) (Endpoint, Endpoint) {
q1 := &queue{ReaderQueue: a.Queue, WriterQueue: b.Queue, limit: initialLimit}
q2 := &queue{ReaderQueue: b.Queue, WriterQueue: a.Queue, limit: initialLimit}
- if stype == SockStream {
+ if stype == linux.SOCK_STREAM {
a.receiver = &streamQueueReceiver{queueReceiver: queueReceiver{q1}}
b.receiver = &streamQueueReceiver{queueReceiver: queueReceiver{q2}}
} else {
@@ -162,7 +163,7 @@ func NewPair(stype SockType, uid UniqueIDProvider) (Endpoint, Endpoint) {
// NewExternal creates a new externally backed Endpoint. It behaves like a
// socketpair.
-func NewExternal(stype SockType, uid UniqueIDProvider, queue *waiter.Queue, receiver Receiver, connected ConnectedEndpoint) Endpoint {
+func NewExternal(stype linux.SockType, uid UniqueIDProvider, queue *waiter.Queue, receiver Receiver, connected ConnectedEndpoint) Endpoint {
return &connectionedEndpoint{
baseEndpoint: baseEndpoint{Queue: queue, receiver: receiver, connected: connected},
id: uid.UniqueID(),
@@ -177,7 +178,7 @@ func (e *connectionedEndpoint) ID() uint64 {
}
// Type implements ConnectingEndpoint.Type and Endpoint.Type.
-func (e *connectionedEndpoint) Type() SockType {
+func (e *connectionedEndpoint) Type() linux.SockType {
return e.stype
}
@@ -293,7 +294,7 @@ func (e *connectionedEndpoint) BidirectionalConnect(ce ConnectingEndpoint, retur
}
writeQueue := &queue{ReaderQueue: ne.Queue, WriterQueue: ce.WaiterQueue(), limit: initialLimit}
- if e.stype == SockStream {
+ if e.stype == linux.SOCK_STREAM {
ne.receiver = &streamQueueReceiver{queueReceiver: queueReceiver{readQueue: writeQueue}}
} else {
ne.receiver = &queueReceiver{readQueue: writeQueue}
@@ -308,7 +309,7 @@ func (e *connectionedEndpoint) BidirectionalConnect(ce ConnectingEndpoint, retur
writeQueue: writeQueue,
}
readQueue.IncRef()
- if e.stype == SockStream {
+ if e.stype == linux.SOCK_STREAM {
returnConnect(&streamQueueReceiver{queueReceiver: queueReceiver{readQueue: readQueue}}, connected)
} else {
returnConnect(&queueReceiver{readQueue: readQueue}, connected)
@@ -428,7 +429,7 @@ func (e *connectionedEndpoint) Bind(addr tcpip.FullAddress, commit func() *syser
func (e *connectionedEndpoint) SendMsg(data [][]byte, c ControlMessages, to BoundEndpoint) (uintptr, *syserr.Error) {
// Stream sockets do not support specifying the endpoint. Seqpacket
// sockets ignore the passed endpoint.
- if e.stype == SockStream && to != nil {
+ if e.stype == linux.SOCK_STREAM && to != nil {
return 0, syserr.ErrNotSupported
}
return e.baseEndpoint.SendMsg(data, c, to)
@@ -458,3 +459,11 @@ func (e *connectionedEndpoint) Readiness(mask waiter.EventMask) waiter.EventMask
return ready
}
+
+// State implements socket.Socket.State.
+func (e *connectionedEndpoint) State() uint32 {
+ if e.Connected() {
+ return linux.SS_CONNECTED
+ }
+ return linux.SS_UNCONNECTED
+}
diff --git a/pkg/sentry/socket/unix/transport/connectionless.go b/pkg/sentry/socket/unix/transport/connectionless.go
index 43ff875e4..81ebfba10 100644
--- a/pkg/sentry/socket/unix/transport/connectionless.go
+++ b/pkg/sentry/socket/unix/transport/connectionless.go
@@ -15,6 +15,7 @@
package transport
import (
+ "gvisor.googlesource.com/gvisor/pkg/abi/linux"
"gvisor.googlesource.com/gvisor/pkg/syserr"
"gvisor.googlesource.com/gvisor/pkg/tcpip"
"gvisor.googlesource.com/gvisor/pkg/waiter"
@@ -118,8 +119,8 @@ func (e *connectionlessEndpoint) SendMsg(data [][]byte, c ControlMessages, to Bo
}
// Type implements Endpoint.Type.
-func (e *connectionlessEndpoint) Type() SockType {
- return SockDgram
+func (e *connectionlessEndpoint) Type() linux.SockType {
+ return linux.SOCK_DGRAM
}
// Connect attempts to connect directly to server.
@@ -194,3 +195,18 @@ func (e *connectionlessEndpoint) Readiness(mask waiter.EventMask) waiter.EventMa
return ready
}
+
+// State implements socket.Socket.State.
+func (e *connectionlessEndpoint) State() uint32 {
+ e.Lock()
+ defer e.Unlock()
+
+ switch {
+ case e.isBound():
+ return linux.SS_UNCONNECTED
+ case e.Connected():
+ return linux.SS_CONNECTING
+ default:
+ return linux.SS_DISCONNECTING
+ }
+}
diff --git a/pkg/sentry/socket/unix/transport/unix.go b/pkg/sentry/socket/unix/transport/unix.go
index b734b4c20..5c55c529e 100644
--- a/pkg/sentry/socket/unix/transport/unix.go
+++ b/pkg/sentry/socket/unix/transport/unix.go
@@ -19,6 +19,7 @@ import (
"sync"
"sync/atomic"
+ "gvisor.googlesource.com/gvisor/pkg/abi/linux"
"gvisor.googlesource.com/gvisor/pkg/syserr"
"gvisor.googlesource.com/gvisor/pkg/tcpip"
"gvisor.googlesource.com/gvisor/pkg/tcpip/buffer"
@@ -28,21 +29,6 @@ import (
// initialLimit is the starting limit for the socket buffers.
const initialLimit = 16 * 1024
-// A SockType is a type (as opposed to family) of sockets. These are enumerated
-// in the syscall package as syscall.SOCK_* constants.
-type SockType int
-
-const (
- // SockStream corresponds to syscall.SOCK_STREAM.
- SockStream SockType = 1
- // SockDgram corresponds to syscall.SOCK_DGRAM.
- SockDgram SockType = 2
- // SockRaw corresponds to syscall.SOCK_RAW.
- SockRaw SockType = 3
- // SockSeqpacket corresponds to syscall.SOCK_SEQPACKET.
- SockSeqpacket SockType = 5
-)
-
// A RightsControlMessage is a control message containing FDs.
type RightsControlMessage interface {
// Clone returns a copy of the RightsControlMessage.
@@ -175,7 +161,7 @@ type Endpoint interface {
// Type return the socket type, typically either SockStream, SockDgram
// or SockSeqpacket.
- Type() SockType
+ Type() linux.SockType
// GetLocalAddress returns the address to which the endpoint is bound.
GetLocalAddress() (tcpip.FullAddress, *tcpip.Error)
@@ -191,6 +177,10 @@ type Endpoint interface {
// GetSockOpt gets a socket option. opt should be a pointer to one of the
// tcpip.*Option types.
GetSockOpt(opt interface{}) *tcpip.Error
+
+ // State returns the current state of the socket, as represented by Linux in
+ // procfs.
+ State() uint32
}
// A Credentialer is a socket or endpoint that supports the SO_PASSCRED socket
@@ -237,6 +227,10 @@ type BoundEndpoint interface {
// endpoint.
UnidirectionalConnect() (ConnectedEndpoint, *syserr.Error)
+ // Passcred returns whether or not the SO_PASSCRED socket option is
+ // enabled on this end.
+ Passcred() bool
+
// Release releases any resources held by the BoundEndpoint. It must be
// called before dropping all references to a BoundEndpoint returned by a
// function.
@@ -621,7 +615,7 @@ type connectedEndpoint struct {
GetLocalAddress() (tcpip.FullAddress, *tcpip.Error)
// Type implements Endpoint.Type.
- Type() SockType
+ Type() linux.SockType
}
writeQueue *queue
@@ -645,7 +639,7 @@ func (e *connectedEndpoint) Send(data [][]byte, controlMessages ControlMessages,
}
truncate := false
- if e.endpoint.Type() == SockStream {
+ if e.endpoint.Type() == linux.SOCK_STREAM {
// Since stream sockets don't preserve message boundaries, we
// can write only as much of the message as fits in the queue.
truncate = true
diff --git a/pkg/sentry/socket/unix/unix.go b/pkg/sentry/socket/unix/unix.go
index 1414be0c6..b07e8d67b 100644
--- a/pkg/sentry/socket/unix/unix.go
+++ b/pkg/sentry/socket/unix/unix.go
@@ -17,6 +17,7 @@
package unix
import (
+ "fmt"
"strings"
"syscall"
@@ -55,22 +56,22 @@ type SocketOperations struct {
refs.AtomicRefCount
socket.SendReceiveTimeout
- ep transport.Endpoint
- isPacket bool
+ ep transport.Endpoint
+ stype linux.SockType
}
// New creates a new unix socket.
-func New(ctx context.Context, endpoint transport.Endpoint, isPacket bool) *fs.File {
+func New(ctx context.Context, endpoint transport.Endpoint, stype linux.SockType) *fs.File {
dirent := socket.NewDirent(ctx, unixSocketDevice)
defer dirent.DecRef()
- return NewWithDirent(ctx, dirent, endpoint, isPacket, fs.FileFlags{Read: true, Write: true})
+ return NewWithDirent(ctx, dirent, endpoint, stype, fs.FileFlags{Read: true, Write: true})
}
// NewWithDirent creates a new unix socket using an existing dirent.
-func NewWithDirent(ctx context.Context, d *fs.Dirent, ep transport.Endpoint, isPacket bool, flags fs.FileFlags) *fs.File {
+func NewWithDirent(ctx context.Context, d *fs.Dirent, ep transport.Endpoint, stype linux.SockType, flags fs.FileFlags) *fs.File {
return fs.NewFile(ctx, d, flags, &SocketOperations{
- ep: ep,
- isPacket: isPacket,
+ ep: ep,
+ stype: stype,
})
}
@@ -88,6 +89,18 @@ func (s *SocketOperations) Release() {
s.DecRef()
}
+func (s *SocketOperations) isPacket() bool {
+ switch s.stype {
+ case linux.SOCK_DGRAM, linux.SOCK_SEQPACKET:
+ return true
+ case linux.SOCK_STREAM:
+ return false
+ default:
+ // We shouldn't have allowed any other socket types during creation.
+ panic(fmt.Sprintf("Invalid socket type %d", s.stype))
+ }
+}
+
// Endpoint extracts the transport.Endpoint.
func (s *SocketOperations) Endpoint() transport.Endpoint {
return s.ep
@@ -193,7 +206,7 @@ func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int,
}
}
- ns := New(t, ep, s.isPacket)
+ ns := New(t, ep, s.stype)
defer ns.DecRef()
if flags&linux.SOCK_NONBLOCK != 0 {
@@ -221,7 +234,7 @@ func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int,
return 0, nil, 0, syserr.FromError(e)
}
- t.Kernel().RecordSocket(ns, linux.AF_UNIX)
+ t.Kernel().RecordSocket(ns)
return fd, addr, addrLen, nil
}
@@ -385,6 +398,10 @@ func (s *SocketOperations) SendMsg(t *kernel.Task, src usermem.IOSequence, to []
}
defer ep.Release()
w.To = ep
+
+ if ep.Passcred() && w.Control.Credentials == nil {
+ w.Control.Credentials = control.MakeCreds(t)
+ }
}
n, err := src.CopyInTo(t, &w)
@@ -483,6 +500,7 @@ func (s *SocketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags
peek := flags&linux.MSG_PEEK != 0
dontWait := flags&linux.MSG_DONTWAIT != 0
waitAll := flags&linux.MSG_WAITALL != 0
+ isPacket := s.isPacket()
// Calculate the number of FDs for which we have space and if we are
// requesting credentials.
@@ -516,7 +534,7 @@ func (s *SocketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags
if n, err := dst.CopyOutFrom(t, &r); err != syserror.ErrWouldBlock || dontWait {
var from interface{}
var fromLen uint32
- if r.From != nil {
+ if r.From != nil && len([]byte(r.From.Addr)) != 0 {
from, fromLen = epsocket.ConvertAddress(linux.AF_UNIX, *r.From)
}
@@ -524,8 +542,8 @@ func (s *SocketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags
msgFlags |= linux.MSG_CTRUNC
}
- if err != nil || dontWait || !waitAll || s.isPacket || n >= dst.NumBytes() {
- if s.isPacket && n < int64(r.MsgSize) {
+ if err != nil || dontWait || !waitAll || isPacket || n >= dst.NumBytes() {
+ if isPacket && n < int64(r.MsgSize) {
msgFlags |= linux.MSG_TRUNC
}
@@ -566,11 +584,11 @@ func (s *SocketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags
total += n
}
- if err != nil || !waitAll || s.isPacket || n >= dst.NumBytes() {
+ if err != nil || !waitAll || isPacket || n >= dst.NumBytes() {
if total > 0 {
err = nil
}
- if s.isPacket && n < int64(r.MsgSize) {
+ if isPacket && n < int64(r.MsgSize) {
msgFlags |= linux.MSG_TRUNC
}
return int(total), msgFlags, from, fromLen, socket.ControlMessages{Unix: r.Control}, syserr.FromError(err)
@@ -592,11 +610,22 @@ func (s *SocketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags
}
}
+// State implements socket.Socket.State.
+func (s *SocketOperations) State() uint32 {
+ return s.ep.State()
+}
+
+// Type implements socket.Socket.Type.
+func (s *SocketOperations) Type() (family int, skType linux.SockType, protocol int) {
+ // Unix domain sockets always have a protocol of 0.
+ return linux.AF_UNIX, s.stype, 0
+}
+
// provider is a unix domain socket provider.
type provider struct{}
// Socket returns a new unix domain socket.
-func (*provider) Socket(t *kernel.Task, stype transport.SockType, protocol int) (*fs.File, *syserr.Error) {
+func (*provider) Socket(t *kernel.Task, stype linux.SockType, protocol int) (*fs.File, *syserr.Error) {
// Check arguments.
if protocol != 0 && protocol != linux.AF_UNIX /* PF_UNIX */ {
return nil, syserr.ErrProtocolNotSupported
@@ -604,43 +633,36 @@ func (*provider) Socket(t *kernel.Task, stype transport.SockType, protocol int)
// Create the endpoint and socket.
var ep transport.Endpoint
- var isPacket bool
switch stype {
case linux.SOCK_DGRAM:
- isPacket = true
ep = transport.NewConnectionless()
- case linux.SOCK_SEQPACKET:
- isPacket = true
- fallthrough
- case linux.SOCK_STREAM:
+ case linux.SOCK_SEQPACKET, linux.SOCK_STREAM:
ep = transport.NewConnectioned(stype, t.Kernel())
default:
return nil, syserr.ErrInvalidArgument
}
- return New(t, ep, isPacket), nil
+ return New(t, ep, stype), nil
}
// Pair creates a new pair of AF_UNIX connected sockets.
-func (*provider) Pair(t *kernel.Task, stype transport.SockType, protocol int) (*fs.File, *fs.File, *syserr.Error) {
+func (*provider) Pair(t *kernel.Task, stype linux.SockType, protocol int) (*fs.File, *fs.File, *syserr.Error) {
// Check arguments.
if protocol != 0 && protocol != linux.AF_UNIX /* PF_UNIX */ {
return nil, nil, syserr.ErrProtocolNotSupported
}
- var isPacket bool
switch stype {
- case linux.SOCK_STREAM:
- case linux.SOCK_DGRAM, linux.SOCK_SEQPACKET:
- isPacket = true
+ case linux.SOCK_STREAM, linux.SOCK_DGRAM, linux.SOCK_SEQPACKET:
+ // Ok
default:
return nil, nil, syserr.ErrInvalidArgument
}
// Create the endpoints and sockets.
ep1, ep2 := transport.NewPair(stype, t.Kernel())
- s1 := New(t, ep1, isPacket)
- s2 := New(t, ep2, isPacket)
+ s1 := New(t, ep1, stype)
+ s2 := New(t, ep2, stype)
return s1, s2, nil
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-01 08:45:17 +0000