doctor: add package for running in-depth healthchecks; use in bugreport (#5413)

Change-Id: Iaa4e5b021a545447f319cfe8b3da2bd3e5e5782b Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
2022-09-26 13:07:28 -04:00
parent e3beb4429f
commit b1867457a6
17 changed files with 1508 additions and 5 deletions
--- a/net/routetable/routetable_linux_test.go
+++ b/net/routetable/routetable_linux_test.go
@ -0,0 +1,83 @@
+// Copyright (c) 2022 Tailscale Inc & 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 routetable
+
+import (
+	"fmt"
+	"net/netip"
+	"testing"
+
+	"golang.org/x/sys/unix"
+)
+
+func TestGetRouteTable(t *testing.T) {
+	routes, err := Get(1000)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Basic assertion: we have at least one 'default' route in the main table
+	var (
+		hasDefault bool
+	)
+	for _, route := range routes {
+		if route.Dst == defaultRouteIPv4 && route.Sys.(RouteEntryLinux).Table == unix.RT_TABLE_MAIN {
+			hasDefault = true
+		}
+	}
+	if !hasDefault {
+		t.Errorf("expected at least one default route; routes=%v", routes)
+	}
+}
+
+func TestRouteEntryFormatting(t *testing.T) {
+	testCases := []struct {
+		re   RouteEntry
+		want string
+	}{
+		{
+			re: RouteEntry{
+				Family:    4,
+				Type:      RouteTypeMulticast,
+				Dst:       RouteDestination{Prefix: netip.MustParsePrefix("100.64.0.0/10")},
+				Gateway:   netip.MustParseAddr("1.2.3.1"),
+				Interface: "tailscale0",
+				Sys: RouteEntryLinux{
+					Type:     unix.RTN_UNICAST,
+					Table:    52,
+					Proto:    unix.RTPROT_STATIC,
+					Src:      netip.MustParseAddr("1.2.3.4"),
+					Priority: 555,
+				},
+			},
+			want: `{Family: IPv4, Type: multicast, Dst: 100.64.0.0/10, Gateway: 1.2.3.1, Interface: tailscale0, Sys: {Type: unicast, Table: 52, Proto: static, Src: 1.2.3.4, Priority: 555}}`,
+		},
+		{
+			re: RouteEntry{
+				Family:  4,
+				Type:    RouteTypeUnicast,
+				Dst:     RouteDestination{Prefix: netip.MustParsePrefix("1.2.3.0/24")},
+				Gateway: netip.MustParseAddr("1.2.3.1"),
+				Sys: RouteEntryLinux{
+					Type:  unix.RTN_UNICAST,
+					Table: unix.RT_TABLE_MAIN,
+					Proto: unix.RTPROT_BOOT,
+				},
+			},
+			want: `{Family: IPv4, Dst: 1.2.3.0/24, Gateway: 1.2.3.1, Sys: {Type: unicast}}`,
+		},
+	}
+	for _, tc := range testCases {
+		t.Run("", func(t *testing.T) {
+			got := fmt.Sprint(tc.re)
+			if got != tc.want {
+				t.Fatalf("RouteEntry.String() = %q; want %q", got, tc.want)
+			}
+		})
+	}
+}