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-rw-r--r--pkg/tcpip/tests/integration/BUILD1
-rw-r--r--pkg/tcpip/tests/integration/multicast_broadcast_test.go208
2 files changed, 187 insertions, 22 deletions
diff --git a/pkg/tcpip/tests/integration/BUILD b/pkg/tcpip/tests/integration/BUILD
index 7fff30462..6d52af98a 100644
--- a/pkg/tcpip/tests/integration/BUILD
+++ b/pkg/tcpip/tests/integration/BUILD
@@ -14,6 +14,7 @@ go_test(
"//pkg/tcpip/network/ipv4",
"//pkg/tcpip/network/ipv6",
"//pkg/tcpip/stack",
+ "//pkg/tcpip/transport/icmp",
"//pkg/tcpip/transport/udp",
"//pkg/waiter",
"@com_github_google_go_cmp//cmp:go_default_library",
diff --git a/pkg/tcpip/tests/integration/multicast_broadcast_test.go b/pkg/tcpip/tests/integration/multicast_broadcast_test.go
index d9b2d147a..0ff3a2b89 100644
--- a/pkg/tcpip/tests/integration/multicast_broadcast_test.go
+++ b/pkg/tcpip/tests/integration/multicast_broadcast_test.go
@@ -15,6 +15,7 @@
package integration_test
import (
+ "net"
"testing"
"github.com/google/go-cmp/cmp"
@@ -25,11 +26,195 @@ import (
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
"gvisor.dev/gvisor/pkg/tcpip/stack"
+ "gvisor.dev/gvisor/pkg/tcpip/transport/icmp"
"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
"gvisor.dev/gvisor/pkg/waiter"
)
-const defaultMTU = 1280
+const (
+ defaultMTU = 1280
+ ttl = 255
+)
+
+var (
+ ipv4Addr = tcpip.AddressWithPrefix{
+ Address: tcpip.Address(net.ParseIP("192.168.1.58").To4()),
+ PrefixLen: 24,
+ }
+ ipv4Subnet = ipv4Addr.Subnet()
+ ipv4SubnetBcast = ipv4Subnet.Broadcast()
+
+ ipv6Addr = tcpip.AddressWithPrefix{
+ Address: tcpip.Address(net.ParseIP("200a::1").To16()),
+ PrefixLen: 64,
+ }
+ ipv6Subnet = ipv6Addr.Subnet()
+ ipv6SubnetBcast = ipv6Subnet.Broadcast()
+
+ // Remote addrs.
+ remoteIPv4Addr = tcpip.Address(net.ParseIP("10.0.0.1").To4())
+ remoteIPv6Addr = tcpip.Address(net.ParseIP("200b::1").To16())
+)
+
+// TestPingMulticastBroadcast tests that responding to an Echo Request destined
+// to a multicast or broadcast address uses a unicast source address for the
+// reply.
+func TestPingMulticastBroadcast(t *testing.T) {
+ const nicID = 1
+
+ rxIPv4ICMP := func(e *channel.Endpoint, dst tcpip.Address) {
+ totalLen := header.IPv4MinimumSize + header.ICMPv4MinimumSize
+ hdr := buffer.NewPrependable(totalLen)
+ pkt := header.ICMPv4(hdr.Prepend(header.ICMPv4MinimumSize))
+ pkt.SetType(header.ICMPv4Echo)
+ pkt.SetCode(0)
+ pkt.SetChecksum(0)
+ pkt.SetChecksum(^header.Checksum(pkt, 0))
+ ip := header.IPv4(hdr.Prepend(header.IPv4MinimumSize))
+ ip.Encode(&header.IPv4Fields{
+ IHL: header.IPv4MinimumSize,
+ TotalLength: uint16(totalLen),
+ Protocol: uint8(icmp.ProtocolNumber4),
+ TTL: ttl,
+ SrcAddr: remoteIPv4Addr,
+ DstAddr: dst,
+ })
+
+ e.InjectInbound(header.IPv4ProtocolNumber, &stack.PacketBuffer{
+ Data: hdr.View().ToVectorisedView(),
+ })
+ }
+
+ rxIPv6ICMP := func(e *channel.Endpoint, dst tcpip.Address) {
+ totalLen := header.IPv6MinimumSize + header.ICMPv6MinimumSize
+ hdr := buffer.NewPrependable(totalLen)
+ pkt := header.ICMPv6(hdr.Prepend(header.ICMPv6MinimumSize))
+ pkt.SetType(header.ICMPv6EchoRequest)
+ pkt.SetCode(0)
+ pkt.SetChecksum(0)
+ pkt.SetChecksum(header.ICMPv6Checksum(pkt, remoteIPv6Addr, dst, buffer.VectorisedView{}))
+ ip := header.IPv6(hdr.Prepend(header.IPv6MinimumSize))
+ ip.Encode(&header.IPv6Fields{
+ PayloadLength: header.ICMPv6MinimumSize,
+ NextHeader: uint8(icmp.ProtocolNumber6),
+ HopLimit: ttl,
+ SrcAddr: remoteIPv6Addr,
+ DstAddr: dst,
+ })
+
+ e.InjectInbound(header.IPv6ProtocolNumber, &stack.PacketBuffer{
+ Data: hdr.View().ToVectorisedView(),
+ })
+ }
+
+ tests := []struct {
+ name string
+ dstAddr tcpip.Address
+ }{
+ {
+ name: "IPv4 unicast",
+ dstAddr: ipv4Addr.Address,
+ },
+ {
+ name: "IPv4 directed broadcast",
+ dstAddr: ipv4SubnetBcast,
+ },
+ {
+ name: "IPv4 broadcast",
+ dstAddr: header.IPv4Broadcast,
+ },
+ {
+ name: "IPv4 all-systems multicast",
+ dstAddr: header.IPv4AllSystems,
+ },
+ {
+ name: "IPv6 unicast",
+ dstAddr: ipv6Addr.Address,
+ },
+ {
+ name: "IPv6 all-nodes multicast",
+ dstAddr: header.IPv6AllNodesMulticastAddress,
+ },
+ }
+
+ for _, test := range tests {
+ t.Run(test.name, func(t *testing.T) {
+ ipv4Proto := ipv4.NewProtocol()
+ ipv6Proto := ipv6.NewProtocol()
+ s := stack.New(stack.Options{
+ NetworkProtocols: []stack.NetworkProtocol{ipv4Proto, ipv6Proto},
+ TransportProtocols: []stack.TransportProtocol{icmp.NewProtocol4(), icmp.NewProtocol6()},
+ })
+ // We only expect a single packet in response to our ICMP Echo Request.
+ e := channel.New(1, defaultMTU, "")
+ if err := s.CreateNIC(nicID, e); err != nil {
+ t.Fatalf("CreateNIC(%d, _): %s", nicID, err)
+ }
+ ipv4ProtoAddr := tcpip.ProtocolAddress{Protocol: header.IPv4ProtocolNumber, AddressWithPrefix: ipv4Addr}
+ if err := s.AddProtocolAddress(nicID, ipv4ProtoAddr); err != nil {
+ t.Fatalf("AddProtocolAddress(%d, %+v): %s", nicID, ipv4ProtoAddr, err)
+ }
+ ipv6ProtoAddr := tcpip.ProtocolAddress{Protocol: header.IPv6ProtocolNumber, AddressWithPrefix: ipv6Addr}
+ if err := s.AddProtocolAddress(nicID, ipv6ProtoAddr); err != nil {
+ t.Fatalf("AddProtocolAddress(%d, %+v): %s", nicID, ipv6ProtoAddr, err)
+ }
+
+ // Default routes for IPv4 and IPv6 so ICMP can find a route to the remote
+ // node when attempting to send the ICMP Echo Reply.
+ s.SetRouteTable([]tcpip.Route{
+ tcpip.Route{
+ Destination: header.IPv6EmptySubnet,
+ NIC: nicID,
+ },
+ tcpip.Route{
+ Destination: header.IPv4EmptySubnet,
+ NIC: nicID,
+ },
+ })
+
+ var rxICMP func(*channel.Endpoint, tcpip.Address)
+ var expectedSrc tcpip.Address
+ var expectedDst tcpip.Address
+ var proto stack.NetworkProtocol
+ switch l := len(test.dstAddr); l {
+ case header.IPv4AddressSize:
+ rxICMP = rxIPv4ICMP
+ expectedSrc = ipv4Addr.Address
+ expectedDst = remoteIPv4Addr
+ proto = ipv4Proto
+ case header.IPv6AddressSize:
+ rxICMP = rxIPv6ICMP
+ expectedSrc = ipv6Addr.Address
+ expectedDst = remoteIPv6Addr
+ proto = ipv6Proto
+ default:
+ t.Fatalf("got unexpected address length = %d bytes", l)
+ }
+
+ rxICMP(e, test.dstAddr)
+ pkt, ok := e.Read()
+ if !ok {
+ t.Fatal("expected ICMP response")
+ }
+
+ if pkt.Route.LocalAddress != expectedSrc {
+ t.Errorf("got pkt.Route.LocalAddress = %s, want = %s", pkt.Route.LocalAddress, expectedSrc)
+ }
+ if pkt.Route.RemoteAddress != expectedDst {
+ t.Errorf("got pkt.Route.RemoteAddress = %s, want = %s", pkt.Route.RemoteAddress, expectedDst)
+ }
+
+ src, dst := proto.ParseAddresses(pkt.Pkt.NetworkHeader)
+ if src != expectedSrc {
+ t.Errorf("got pkt source = %s, want = %s", src, expectedSrc)
+ }
+ if dst != expectedDst {
+ t.Errorf("got pkt destination = %s, want = %s", dst, expectedDst)
+ }
+ })
+ }
+
+}
// TestIncomingMulticastAndBroadcast tests receiving a packet destined to some
// multicast or broadcast address.
@@ -38,31 +223,10 @@ func TestIncomingMulticastAndBroadcast(t *testing.T) {
nicID = 1
remotePort = 5555
localPort = 80
- ttl = 255
)
data := []byte{1, 2, 3, 4}
- // Local IPv4 subnet: 192.168.1.58/24
- ipv4Addr := tcpip.AddressWithPrefix{
- Address: "\xc0\xa8\x01\x3a",
- PrefixLen: 24,
- }
- ipv4Subnet := ipv4Addr.Subnet()
- ipv4SubnetBcast := ipv4Subnet.Broadcast()
-
- // Local IPv6 subnet: 200a::1/64
- ipv6Addr := tcpip.AddressWithPrefix{
- Address: "\x20\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01",
- PrefixLen: 64,
- }
- ipv6Subnet := ipv6Addr.Subnet()
- ipv6SubnetBcast := ipv6Subnet.Broadcast()
-
- // Remote addrs.
- remoteIPv4Addr := tcpip.Address("\x64\x0a\x7b\x18")
- remoteIPv6Addr := tcpip.Address("\x20\x0b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02")
-
rxIPv4UDP := func(e *channel.Endpoint, dst tcpip.Address) {
payloadLen := header.UDPMinimumSize + len(data)
totalLen := header.IPv4MinimumSize + payloadLen
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 05:00:27 +0000