// Copyright (c) Tailscale Inc & AUTHORS // SPDX-License-Identifier: BSD-3-Clause //go: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) } }) } }