Files
nebula/overlay/tio/tun_linux_test.go
JackDoan ad6b918e4d checkpt
2026-04-21 13:31:16 -05:00

39 lines
1.1 KiB
Go

//go:build !e2e_testing
// +build !e2e_testing
package tio
import (
"testing"
"github.com/slackhq/nebula/overlay"
)
var runAdvMSSTests = []struct {
name string
tun *overlay.tun
r overlay.Route
expected int
}{
// Standard case, default MTU is the device max MTU
{"default", &overlay.tun{DefaultMTU: 1440, MaxMTU: 1440}, overlay.Route{}, 0},
{"default-min", &overlay.tun{DefaultMTU: 1440, MaxMTU: 1440}, overlay.Route{MTU: 1440}, 0},
{"default-low", &overlay.tun{DefaultMTU: 1440, MaxMTU: 1440}, overlay.Route{MTU: 1200}, 1160},
// Case where we have a route MTU set higher than the default
{"route", &overlay.tun{DefaultMTU: 1440, MaxMTU: 8941}, overlay.Route{}, 1400},
{"route-min", &overlay.tun{DefaultMTU: 1440, MaxMTU: 8941}, overlay.Route{MTU: 1440}, 1400},
{"route-high", &overlay.tun{DefaultMTU: 1440, MaxMTU: 8941}, overlay.Route{MTU: 8941}, 0},
}
func TestTunAdvMSS(t *testing.T) {
for _, tt := range runAdvMSSTests {
t.Run(tt.name, func(t *testing.T) {
o := tt.tun.advMSS(tt.r)
if o != tt.expected {
t.Errorf("got %d, want %d", o, tt.expected)
}
})
}
}