1 files changed, 175 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/ifreq_linux_test.go b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/ifreq_linux_test.go
new file mode 100644
index 0000000..b81a8b6
--- /dev/null
+++ b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/ifreq_linux_test.go
@@ -0,0 +1,175 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux
+// +build linux
+
+package unix
+
+import (
+	"bytes"
+	"net"
+	"testing"
+	"unsafe"
+)
+
+// An ifreqUnion is shorthand for a byte array matching the
+// architecture-dependent size of an ifreq's union field.
+type ifreqUnion = [len(ifreq{}.Ifru)]byte
+
+func TestNewIfreq(t *testing.T) {
+	// Interface name too long.
+	if _, err := NewIfreq("abcdefghijklmnop"); err != EINVAL {
+		t.Fatalf("expected error EINVAL, but got: %v", err)
+	}
+}
+
+func TestIfreqSize(t *testing.T) {
+	// Ensure ifreq (generated) and Ifreq/ifreqData (hand-written to create a
+	// safe wrapper and store a pointer field) are identical in size.
+	want := unsafe.Sizeof(ifreq{})
+	if got := unsafe.Sizeof(Ifreq{}); want != got {
+		t.Fatalf("unexpected Ifreq size: got: %d, want: %d", got, want)
+	}
+
+	if got := unsafe.Sizeof(ifreqData{}); want != got {
+		t.Fatalf("unexpected IfreqData size: got: %d, want: %d", got, want)
+	}
+}
+
+func TestIfreqName(t *testing.T) {
+	// Valid ifreq, expect the hard-coded testIfreq name.
+	ifr := testIfreq(t)
+	if want, got := ifreqName, ifr.Name(); want != got {
+		t.Fatalf("unexpected ifreq name: got: %q, want: %q", got, want)
+	}
+}
+
+func TestIfreqWithData(t *testing.T) {
+	ifr := testIfreq(t)
+
+	// Store pointer data in the ifreq so we can retrieve it and cast back later
+	// for comparison.
+	want := [5]byte{'h', 'e', 'l', 'l', 'o'}
+	ifrd := ifr.withData(unsafe.Pointer(&want[0]))
+
+	// Ensure the memory of the original Ifreq was not modified by SetData.
+	if ifr.raw.Ifru != (ifreqUnion{}) {
+		t.Fatalf("ifreq was unexpectedly modified: % #x", ifr.raw.Ifru)
+	}
+
+	got := *(*[5]byte)(ifrd.data)
+	if want != got {
+		t.Fatalf("unexpected ifreq data bytes:\n got: % #x\nwant: % #x", got, want)
+	}
+}
+
+func TestIfreqInet4Addr(t *testing.T) {
+	ifr := testIfreq(t)
+	in := net.IPv4(192, 0, 2, 1).To4()
+	if err := ifr.SetInet4Addr(in); err != nil {
+		t.Fatalf("failed to set ifreq IPv4 address: %v", err)
+	}
+
+	// Store fixed offset data (AF_INET, IPv4 address) within underlying
+	// sockaddr bytes. Everything else should be zeroed.
+	want := ifreqUnion{4: 192, 5: 0, 6: 2, 7: 1}
+	if isBigEndian {
+		want[0] = 0x00
+		want[1] = 0x02
+	} else {
+		want[0] = 0x02
+		want[1] = 0x00
+	}
+
+	if got := ifr.raw.Ifru; want != got {
+		t.Fatalf("unexpected ifreq sockaddr bytes:\n got: % #x\nwant: % #x", got, want)
+	}
+
+	got, err := ifr.Inet4Addr()
+	if err != nil {
+		t.Fatalf("failed to get ifreq IPv4 address: %v", err)
+	}
+	if !bytes.Equal(in, got) {
+		t.Fatalf("unexpected ifreq IPv4 address:\n got: % #x\nwant: % #x", got, in)
+	}
+
+	// Invalid input, wrong length.
+	if err := ifr.SetInet4Addr([]byte{0xff}); err == nil {
+		t.Fatal("expected an error setting invalid IPv4 address, but none occurred")
+	}
+
+	// Invalid output, AF_INET is only set by SetInet4Addr input.
+	ifr.SetUint32(0xffffffff)
+	if _, err := ifr.Inet4Addr(); err == nil {
+		t.Fatal("expected an error getting invalid IPv4 address, but none occurred")
+	}
+}
+
+func TestIfreqUint16(t *testing.T) {
+	ifr := testIfreq(t)
+	const in = 0x0102
+	ifr.SetUint16(in)
+
+	// The layout of the bytes depends on the machine's endianness.
+	var want ifreqUnion
+	if isBigEndian {
+		want[0] = 0x01
+		want[1] = 0x02
+	} else {
+		want[0] = 0x02
+		want[1] = 0x01
+	}
+
+	if got := ifr.raw.Ifru; want != got {
+		t.Fatalf("unexpected ifreq uint16 bytes:\n got: % #x\nwant: % #x", got, want)
+	}
+
+	if got := ifr.Uint16(); in != got {
+		t.Fatalf("unexpected ifreq uint16: got: %d, want: %d", got, in)
+	}
+}
+
+func TestIfreqUint32(t *testing.T) {
+	ifr := testIfreq(t)
+	const in = 0x01020304
+	ifr.SetUint32(in)
+
+	// The layout of the bytes depends on the machine's endianness.
+	var want ifreqUnion
+	if isBigEndian {
+		want[0] = 0x01
+		want[1] = 0x02
+		want[2] = 0x03
+		want[3] = 0x04
+	} else {
+		want[0] = 0x04
+		want[1] = 0x03
+		want[2] = 0x02
+		want[3] = 0x01
+	}
+
+	if got := ifr.raw.Ifru; want != got {
+		t.Fatalf("unexpected ifreq uint32 bytes:\n got: % #x\nwant: % #x", got, want)
+	}
+
+	if got := ifr.Uint32(); in != got {
+		t.Fatalf("unexpected ifreq uint32: got: %d, want: %d", got, in)
+	}
+}
+
+// ifreqName is a hard-coded name for testIfreq.
+const ifreqName = "eth0"
+
+// testIfreq returns an Ifreq with a populated interface name.
+func testIfreq(t *testing.T) *Ifreq {
+	t.Helper()
+
+	ifr, err := NewIfreq(ifreqName)
+	if err != nil {
+		t.Fatalf("failed to create ifreq: %v", err)
+	}
+
+	return ifr
+}