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path: root/pkg/tcpip/transport/udp/udp_test.go
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Diffstat (limited to 'pkg/tcpip/transport/udp/udp_test.go')
-rw-r--r--pkg/tcpip/transport/udp/udp_test.go235
1 files changed, 198 insertions, 37 deletions
diff --git a/pkg/tcpip/transport/udp/udp_test.go b/pkg/tcpip/transport/udp/udp_test.go
index 4700193c2..6d7a737bd 100644
--- a/pkg/tcpip/transport/udp/udp_test.go
+++ b/pkg/tcpip/transport/udp/udp_test.go
@@ -34,16 +34,20 @@ import (
)
const (
- stackV6Addr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01"
- testV6Addr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02"
- stackV4MappedAddr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff" + stackAddr
- testV4MappedAddr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff" + testAddr
- V4MappedWildcardAddr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\x00\x00\x00\x00"
-
- stackAddr = "\x0a\x00\x00\x01"
- stackPort = 1234
- testAddr = "\x0a\x00\x00\x02"
- testPort = 4096
+ stackV6Addr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01"
+ testV6Addr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02"
+ stackV4MappedAddr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff" + stackAddr
+ testV4MappedAddr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff" + testAddr
+ multicastV4MappedAddr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff" + multicastAddr
+ V4MappedWildcardAddr = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\x00\x00\x00\x00"
+
+ stackAddr = "\x0a\x00\x00\x01"
+ stackPort = 1234
+ testAddr = "\x0a\x00\x00\x02"
+ testPort = 4096
+ multicastAddr = "\xe8\x2b\xd3\xea"
+ multicastV6Addr = "\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ multicastPort = 1234
// defaultMTU is the MTU, in bytes, used throughout the tests, except
// where another value is explicitly used. It is chosen to match the MTU
@@ -128,37 +132,35 @@ func (c *testContext) createV6Endpoint(v6only bool) {
}
}
-func (c *testContext) getV6Packet() []byte {
+func (c *testContext) getPacket(protocolNumber tcpip.NetworkProtocolNumber, multicast bool) []byte {
select {
case p := <-c.linkEP.C:
- if p.Proto != ipv6.ProtocolNumber {
- c.t.Fatalf("Bad network protocol: got %v, wanted %v", p.Proto, ipv6.ProtocolNumber)
+ if p.Proto != protocolNumber {
+ c.t.Fatalf("Bad network protocol: got %v, wanted %v", p.Proto, protocolNumber)
}
b := make([]byte, len(p.Header)+len(p.Payload))
copy(b, p.Header)
copy(b[len(p.Header):], p.Payload)
- checker.IPv6(c.t, b, checker.SrcAddr(stackV6Addr), checker.DstAddr(testV6Addr))
- return b
-
- case <-time.After(2 * time.Second):
- c.t.Fatalf("Packet wasn't written out")
- }
-
- return nil
-}
-
-func (c *testContext) getPacket() []byte {
- select {
- case p := <-c.linkEP.C:
- if p.Proto != ipv4.ProtocolNumber {
- c.t.Fatalf("Bad network protocol: got %v, wanted %v", p.Proto, ipv4.ProtocolNumber)
+ var checkerFn func(*testing.T, []byte, ...checker.NetworkChecker)
+ var srcAddr, dstAddr tcpip.Address
+ switch protocolNumber {
+ case ipv4.ProtocolNumber:
+ checkerFn = checker.IPv4
+ srcAddr, dstAddr = stackAddr, testAddr
+ if multicast {
+ dstAddr = multicastAddr
+ }
+ case ipv6.ProtocolNumber:
+ checkerFn = checker.IPv6
+ srcAddr, dstAddr = stackV6Addr, testV6Addr
+ if multicast {
+ dstAddr = multicastV6Addr
+ }
+ default:
+ c.t.Fatalf("unknown protocol %d", protocolNumber)
}
- b := make([]byte, len(p.Header)+len(p.Payload))
- copy(b, p.Header)
- copy(b[len(p.Header):], p.Payload)
-
- checker.IPv4(c.t, b, checker.SrcAddr(stackAddr), checker.DstAddr(testAddr))
+ checkerFn(c.t, b, checker.SrcAddr(srcAddr), checker.DstAddr(dstAddr))
return b
case <-time.After(2 * time.Second):
@@ -495,7 +497,7 @@ func testV4Write(c *testContext) uint16 {
}
// Check that we received the packet.
- b := c.getPacket()
+ b := c.getPacket(ipv4.ProtocolNumber, false)
udp := header.UDP(header.IPv4(b).Payload())
checker.IPv4(c.t, b,
checker.UDP(
@@ -525,7 +527,7 @@ func testV6Write(c *testContext) uint16 {
}
// Check that we received the packet.
- b := c.getV6Packet()
+ b := c.getPacket(ipv6.ProtocolNumber, false)
udp := header.UDP(header.IPv6(b).Payload())
checker.IPv6(c.t, b,
checker.UDP(
@@ -682,7 +684,7 @@ func TestV6WriteOnConnected(t *testing.T) {
}
// Check that we received the packet.
- b := c.getV6Packet()
+ b := c.getPacket(ipv6.ProtocolNumber, false)
udp := header.UDP(header.IPv6(b).Payload())
checker.IPv6(c.t, b,
checker.UDP(
@@ -718,7 +720,7 @@ func TestV4WriteOnConnected(t *testing.T) {
}
// Check that we received the packet.
- b := c.getPacket()
+ b := c.getPacket(ipv4.ProtocolNumber, false)
udp := header.UDP(header.IPv4(b).Payload())
checker.IPv4(c.t, b,
checker.UDP(
@@ -769,3 +771,162 @@ func TestWriteIncrementsPacketsSent(t *testing.T) {
c.t.Fatalf("Write did not increment PacketsSent: got %v, want %v", got, want)
}
}
+
+func TestTTL(t *testing.T) {
+ payload := tcpip.SlicePayload(buffer.View(newPayload()))
+
+ for _, name := range []string{"v4", "v6", "dual"} {
+ t.Run(name, func(t *testing.T) {
+ var networkProtocolNumber tcpip.NetworkProtocolNumber
+ switch name {
+ case "v4":
+ networkProtocolNumber = ipv4.ProtocolNumber
+ case "v6", "dual":
+ networkProtocolNumber = ipv6.ProtocolNumber
+ default:
+ t.Fatal("unknown test variant")
+ }
+
+ var variants []string
+ switch name {
+ case "v4":
+ variants = []string{"v4"}
+ case "v6":
+ variants = []string{"v6"}
+ case "dual":
+ variants = []string{"v6", "mapped"}
+ }
+
+ for _, variant := range variants {
+ t.Run(variant, func(t *testing.T) {
+ for _, typ := range []string{"unicast", "multicast"} {
+ t.Run(typ, func(t *testing.T) {
+ var addr tcpip.Address
+ var port uint16
+ switch typ {
+ case "unicast":
+ port = testPort
+ switch variant {
+ case "v4":
+ addr = testAddr
+ case "mapped":
+ addr = testV4MappedAddr
+ case "v6":
+ addr = testV6Addr
+ default:
+ t.Fatal("unknown test variant")
+ }
+ case "multicast":
+ port = multicastPort
+ switch variant {
+ case "v4":
+ addr = multicastAddr
+ case "mapped":
+ addr = multicastV4MappedAddr
+ case "v6":
+ addr = multicastV6Addr
+ default:
+ t.Fatal("unknown test variant")
+ }
+ default:
+ t.Fatal("unknown test variant")
+ }
+
+ c := newDualTestContext(t, defaultMTU)
+ defer c.cleanup()
+
+ var err *tcpip.Error
+ c.ep, err = c.s.NewEndpoint(udp.ProtocolNumber, networkProtocolNumber, &c.wq)
+ if err != nil {
+ c.t.Fatalf("NewEndpoint failed: %v", err)
+ }
+
+ switch name {
+ case "v4":
+ case "v6":
+ if err := c.ep.SetSockOpt(tcpip.V6OnlyOption(1)); err != nil {
+ c.t.Fatalf("SetSockOpt failed: %v", err)
+ }
+ case "dual":
+ if err := c.ep.SetSockOpt(tcpip.V6OnlyOption(0)); err != nil {
+ c.t.Fatalf("SetSockOpt failed: %v", err)
+ }
+ default:
+ t.Fatal("unknown test variant")
+ }
+
+ const multicastTTL = 42
+ if err := c.ep.SetSockOpt(tcpip.MulticastTTLOption(multicastTTL)); err != nil {
+ c.t.Fatalf("SetSockOpt failed: %v", err)
+ }
+
+ n, err := c.ep.Write(payload, tcpip.WriteOptions{To: &tcpip.FullAddress{Addr: addr, Port: port}})
+ if err != nil {
+ c.t.Fatalf("Write failed: %v", err)
+ }
+ if n != uintptr(len(payload)) {
+ c.t.Fatalf("got c.ep.Write(...) = %d, want = %d", n, len(payload))
+ }
+
+ checkerFn := checker.IPv4
+ switch variant {
+ case "v4", "mapped":
+ case "v6":
+ checkerFn = checker.IPv6
+ default:
+ t.Fatal("unknown test variant")
+ }
+ var wantTTL uint8
+ var multicast bool
+ switch typ {
+ case "unicast":
+ multicast = false
+ switch variant {
+ case "v4", "mapped":
+ ep, err := ipv4.NewProtocol().NewEndpoint(0, "", nil, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ wantTTL = ep.DefaultTTL()
+ ep.Close()
+ case "v6":
+ ep, err := ipv6.NewProtocol().NewEndpoint(0, "", nil, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ wantTTL = ep.DefaultTTL()
+ ep.Close()
+ default:
+ t.Fatal("unknown test variant")
+ }
+ case "multicast":
+ wantTTL = multicastTTL
+ multicast = true
+ default:
+ t.Fatal("unknown test variant")
+ }
+
+ var networkProtocolNumber tcpip.NetworkProtocolNumber
+ switch variant {
+ case "v4", "mapped":
+ networkProtocolNumber = ipv4.ProtocolNumber
+ case "v6":
+ networkProtocolNumber = ipv6.ProtocolNumber
+ default:
+ t.Fatal("unknown test variant")
+ }
+
+ b := c.getPacket(networkProtocolNumber, multicast)
+ checkerFn(c.t, b,
+ checker.TTL(wantTTL),
+ checker.UDP(
+ checker.DstPort(port),
+ ),
+ )
+ })
+ }
+ })
+ }
+ })
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-20 01:48:08 +0000