Store more information in the kernel socket table.

Store enough information in the kernel socket table to distinguish
between different types of sockets. Previously we were only storing
the socket family, but this isn't enough to classify sockets. For
example, TCPv4 and UDPv4 sockets are both AF_INET, and ICMP sockets
are SOCK_DGRAM sockets with a particular protocol.

Instead of creating more sub-tables, flatten the socket table and
provide a filtering mechanism based on the socket entry.

Also generate and store a socket entry index ("sl" in linux) which
allows us to output entries in a stable order from procfs.

PiperOrigin-RevId: 252495895

1 files changed, 2 insertions, 2 deletions

diff --git a/pkg/sentry/fs/host/socket.go b/pkg/sentry/fs/host/socket.go
index 6423ad938..305eea718 100644
--- a/pkg/sentry/fs/host/socket.go
+++ b/pkg/sentry/fs/host/socket.go
@@ -164,7 +164,7 @@ func NewSocketWithDirent(ctx context.Context, d *fs.Dirent, f *fd.FD, flags fs.F
 
 	ep := transport.NewExternal(e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e)
 
-	return unixsocket.NewWithDirent(ctx, d, ep, e.stype != linux.SOCK_STREAM, flags), nil
+	return unixsocket.NewWithDirent(ctx, d, ep, e.stype, flags), nil
 }
 
 // newSocket allocates a new unix socket with host endpoint.
@@ -196,7 +196,7 @@ func newSocket(ctx context.Context, orgfd int, saveable bool) (*fs.File, error)
 
 	ep := transport.NewExternal(e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e)
 
-	return unixsocket.New(ctx, ep, e.stype != linux.SOCK_STREAM), nil
+	return unixsocket.New(ctx, ep, e.stype), nil
 }
 
 // Send implements transport.ConnectedEndpoint.Send.