snapshot: sagernet/gvisor v0.0.0-20250811.0-sing-box-mod.1

Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом
без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в
каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для
неё не нужна.

Module path github.com/sagernet/gvisor сохранён намеренно: на него
опирается replace-директива суперпроекта.

Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show
и переносилась на новый пин копированием.

SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH

pkg/tcpip/errors_linux.go

@@ -0,0 +1,74 @@
+// Copyright 2024 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build linux
+// +build linux
+
+package tcpip
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+// TranslateErrno translate an errno from the syscall package into a
+// tcpip Error.
+//
+// Valid, but unrecognized errnos will be translated to
+// *ErrInvalidEndpointState (EINVAL). This includes the "zero" value.
+func TranslateErrno(e unix.Errno) Error {
+	switch e {
+	case unix.EEXIST:
+		return &ErrDuplicateAddress{}
+	case unix.ENETUNREACH:
+		return &ErrHostUnreachable{}
+	case unix.EINVAL:
+		return &ErrInvalidEndpointState{}
+	case unix.EALREADY:
+		return &ErrAlreadyConnecting{}
+	case unix.EISCONN:
+		return &ErrAlreadyConnected{}
+	case unix.EADDRINUSE:
+		return &ErrPortInUse{}
+	case unix.EADDRNOTAVAIL:
+		return &ErrBadLocalAddress{}
+	case unix.EPIPE:
+		return &ErrClosedForSend{}
+	case unix.EWOULDBLOCK:
+		return &ErrWouldBlock{}
+	case unix.ECONNREFUSED:
+		return &ErrConnectionRefused{}
+	case unix.ETIMEDOUT:
+		return &ErrTimeout{}
+	case unix.EINPROGRESS:
+		return &ErrConnectStarted{}
+	case unix.EDESTADDRREQ:
+		return &ErrDestinationRequired{}
+	case unix.ENOTSUP:
+		return &ErrNotSupported{}
+	case unix.ENOTTY:
+		return &ErrQueueSizeNotSupported{}
+	case unix.ENOTCONN:
+		return &ErrNotConnected{}
+	case unix.ECONNRESET:
+		return &ErrConnectionReset{}
+	case unix.ECONNABORTED:
+		return &ErrConnectionAborted{}
+	case unix.EMSGSIZE:
+		return &ErrMessageTooLong{}
+	case unix.ENOBUFS:
+		return &ErrNoBufferSpace{}
+	default:
+		return &ErrInvalidEndpointState{}
+	}
+}