Added windows code and fix copyright.

Makefile

@@ -153,7 +153,7 @@ update-pod2daemon-pin:
 ###############################################################################
 # Building the binary
 ###############################################################################
-build: bin/calico-felix build-bpf
+build: bin/calico-felix build-bpf bin/calico-felix.exe
 build-all: $(addprefix sub-build-,$(VALIDARCHES))
 sub-build-%:
 	$(MAKE) build ARCH=$*
@@ -759,6 +759,15 @@ cover-report: combined.coverprofile
 bin/calico-felix.transfer-url: bin/calico-felix
 	$(DOCKER_GO_BUILD) sh -c 'curl --upload-file bin/calico-felix https://transfer.sh/calico-felix > $@'
 
+# Cross-compile Felix for Windows
+bin/calico-felix.exe: $(SRC_FILES)
+	@echo Building felix for Windows...
+	mkdir -p bin
+	$(DOCKER_RUN) $(LOCAL_BUILD_MOUNTS) $(CALICO_BUILD) sh -c '$(GIT_CONFIG_SSH) \
+	   	GOOS=windows go build -v -o $@ -v $(LDFLAGS) "$(PACKAGE_NAME)/cmd/calico-felix" && \
+		( ldd $@ 2>&1 | grep -q "Not a valid dynamic program\|not a dynamic executable" || \
+		( echo "Error: $@ was not statically linked"; false ) )'
+
 .PHONY: patch-script
 patch-script: bin/calico-felix.transfer-url
 	$(DOCKER_GO_BUILD) bash -c 'utils/make-patch-script.sh $$(cat bin/calico-felix.transfer-url)'

bpf/bpf.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2019-2020 Tigera, Inc. All rights reserved.
 
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/bpf_defs.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/bpf_syscall.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2019-2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/bpf_syscall_stub.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2019-2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/bpf_windows.go

@@ -0,0 +1,27 @@
+// +build windows
+
+// Copyright (c) 2019-2020 Tigera, Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bpf
+
+import "fmt"
+
+func SyscallSupport() bool {
+	return false
+}
+
+func SupportsBPFDataplane() error {
+	return fmt.Errorf("BPF dataplane is not supported on Windows")
+}

bpf/conntrack/map.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/ipsets/map.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/maps.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2019-2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/mock/map.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/mock_bpf_lib.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2019-2020 Tigera, Inc. All rights reserved.
 
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/nat/maps.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

bpf/routes/map.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 // Copyright (c) 2020 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

dataplane/driver_windows.go

@@ -0,0 +1,49 @@
+// Copyright (c) 2017-2020 Tigera, Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package dataplane
+
+import (
+	"os/exec"
+
+	log "github.com/sirupsen/logrus"
+	"k8s.io/client-go/kubernetes"
+
+	"github.com/projectcalico/felix/config"
+	windataplane "github.com/projectcalico/felix/dataplane/windows"
+	"github.com/projectcalico/felix/dataplane/windows/hns"
+	"github.com/projectcalico/libcalico-go/lib/health"
+)
+
+func StartDataplaneDriver(configParams *config.Config,
+	healthAggregator *health.HealthAggregator,
+	configChangedRestartCallback func(),
+	k8sClientSet *kubernetes.Clientset) (DataplaneDriver, *exec.Cmd) {
+	log.Info("Using Windows dataplane driver.")
+
+	dpConfig := windataplane.Config{
+		IPv6Enabled:      configParams.Ipv6Support,
+		HealthAggregator: healthAggregator,
+
+		Hostname:     configParams.FelixHostname,
+		VXLANEnabled: configParams.VXLANEnabled,
+		VXLANID:      configParams.VXLANVNI,
+		VXLANPort:    configParams.VXLANPort,
+	}
+
+	winDP := windataplane.NewWinDataplaneDriver(hns.API{}, dpConfig)
+	winDP.Start()
+
+	return winDP, nil
+}