mirror of
https://github.com/soypat/lneto.git
synced 2026-08-17 21:24:04 +00:00
Pat Whittingslow
aa77403a2b
* begin working on arp cache * fix little things * rework arp cache priority * fix test * keep working on ARP * push changes before thinking about ip prefix issue * add passive peer MAC setting * patch egress mac with correct ethernet CRCs * consolidate subnet learning in subnetTable type * add tests and fix subnet table bug
52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
package xnet
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import (
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"bytes"
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"net/netip"
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"testing"
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"github.com/soypat/lneto/ethernet"
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)
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func TestARPLocal(t *testing.T) {
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const mtu = ethernet.MaxMTU
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const seed = 1
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s1, s2, c1, c2 := newTCPStacks(t, seed, mtu)
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routerHw := [6]byte{1, 2, 3, 4, 5, 6}
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// Most common case: we have a router in between computers.
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s1.SetGateway6(routerHw)
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s2.SetGateway6(routerHw)
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addr1 := netip.AddrPortFrom(s1.Addr(), 1024) // dialer, client.
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addr2 := netip.AddrPortFrom(s2.Addr(), 80) // listener, server.
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err := s1.AssimilateDHCPResults(&DHCPResults{
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Router: netip.AddrFrom4([4]byte{10, 0, 0, 255}),
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BroadcastAddr: netip.AddrFrom4([4]byte{255, 255, 255, 255}),
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AssignedAddr: s1.Addr(),
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Subnet: netip.PrefixFrom(s2.Addr(), 24), // Subnet containing s2 will force an ARP on s1.
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TRenewal: 1000,
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TRebind: 1000,
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TLease: 1000,
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})
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if err != nil {
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t.Fatal(err)
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}
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hw2 := s2.HardwareAddress()
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err = s1.DialTCP(c1, addr1.Port(), addr2) // addr2 MAC address is unknown and must be resolved by stack.
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if err != nil {
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t.Fatal(err)
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}
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err = s2.ListenTCP(c2, addr2.Port())
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if err != nil {
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t.Fatal(err)
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}
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tst := testerFrom(t, mtu)
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_ = tst
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tst.ARPExchangeOnly(s1, s2)
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hwaddr, err := s1.arp.CacheLookup(addr2.Addr().AsSlice())
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if err != nil {
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t.Fatal(err)
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} else if !bytes.Equal(hwaddr[:], hw2[:]) {
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t.Errorf("expected hardware address %x, got %x", hw2, hwaddr)
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}
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}
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