138 lines
3.8 KiB
Go
138 lines
3.8 KiB
Go
package fabricvpn
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import (
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"os"
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"testing"
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)
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func TestFabricRuntimeEndpointsPreferRouteBundle(t *testing.T) {
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cfg := runtimeConfig{
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Endpoints: []endpointConfig{{EndpointID: "legacy", Address: "quic://legacy.example:19131"}},
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RouteBundle: routeBundleConfig{
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EndpointCandidates: []endpointConfig{{EndpointID: "bundle", Address: "quic://bundle.example:19131"}},
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},
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}
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got := fabricRuntimeEndpoints(cfg)
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if len(got) != 1 || got[0].EndpointID != "bundle" {
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t.Fatalf("endpoints = %+v, want route bundle endpoint", got)
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}
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}
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func TestFabricRuntimeEndpointsPreferRouteLease(t *testing.T) {
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cfg := runtimeConfig{
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Endpoints: []endpointConfig{{EndpointID: "legacy", Address: "quic://legacy.example:19131"}},
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RouteBundle: routeBundleConfig{
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EndpointCandidates: []endpointConfig{{EndpointID: "bundle", Address: "quic://bundle.example:19131"}},
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RouteLease: routeLeaseConfig{
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SelectedTargetNode: "exit-1",
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PrimaryPath: routeLeasePath{
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TargetNodeID: "exit-1",
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EndpointCandidates: []endpointConfig{{EndpointID: "lease-primary", Address: "quic://lease.example:19131"}},
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},
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},
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},
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}
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got := fabricRuntimeEndpoints(cfg)
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if len(got) != 1 || got[0].EndpointID != "lease-primary" {
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t.Fatalf("endpoints = %+v, want route lease primary endpoint", got)
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}
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if target := fabricRuntimeTargetNodeID(cfg); target != "exit-1" {
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t.Fatalf("target = %q, want exit-1", target)
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}
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}
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func TestFabricRuntimeEndpointsFallbackToLegacyEndpoints(t *testing.T) {
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cfg := runtimeConfig{
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Endpoints: []endpointConfig{{EndpointID: "legacy", Address: "quic://legacy.example:19131"}},
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}
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got := fabricRuntimeEndpoints(cfg)
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if len(got) != 1 || got[0].EndpointID != "legacy" {
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t.Fatalf("endpoints = %+v, want legacy endpoint fallback", got)
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}
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}
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func TestLiveFabricVPNRuntimeStartsFromRouteLease(t *testing.T) {
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raw := os.Getenv("RAP_LIVE_FABRICVPN_CONFIG")
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if raw == "" {
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t.Skip("RAP_LIVE_FABRICVPN_CONFIG is not set")
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}
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manager := NewManager()
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if err := manager.Start(raw); err != nil {
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t.Fatalf("start live fabric vpn runtime: %v", err)
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}
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defer manager.Stop()
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if snapshot := manager.SnapshotJSON(); snapshot == "" {
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t.Fatal("empty live fabric vpn snapshot")
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}
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if os.Getenv("RAP_LIVE_FABRICVPN_PACKET_PROBE") == "" {
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return
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}
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if err := manager.SendPacket(testDNSIPv4Packet()); err != nil {
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t.Fatalf("send live dns packet: %v", err)
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}
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for i := 0; i < 20; i++ {
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packet, err := manager.ReceivePacket(500)
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if err != nil {
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t.Fatalf("receive live dns packet: %v", err)
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}
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if len(packet) > 0 {
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if packet[9] != 17 || packet[12] != 1 || packet[13] != 1 || packet[14] != 1 || packet[15] != 1 {
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t.Fatalf("unexpected response packet header: %v", packet[:min(20, len(packet))])
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}
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return
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}
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}
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t.Fatal("timed out waiting for live dns response through fabric vpn")
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}
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func testDNSIPv4Packet() []byte {
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dns := []byte{
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0x12, 0x34, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x07, 'e', 'x', 'a',
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'm', 'p', 'l', 'e', 0x03, 'c', 'o', 'm', 0x00,
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0x00, 0x01, 0x00, 0x01,
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}
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udpLen := 8 + len(dns)
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totalLen := 20 + udpLen
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packet := make([]byte, totalLen)
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packet[0] = 0x45
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packet[2] = byte(totalLen >> 8)
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packet[3] = byte(totalLen)
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packet[8] = 64
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packet[9] = 17
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copy(packet[12:16], []byte{10, 77, 0, 2})
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copy(packet[16:20], []byte{1, 1, 1, 1})
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packet[20] = 0xcf
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packet[21] = 0x08
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packet[22] = 0x00
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packet[23] = 0x35
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packet[24] = byte(udpLen >> 8)
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packet[25] = byte(udpLen)
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copy(packet[28:], dns)
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sum := ipv4HeaderChecksum(packet[:20])
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packet[10] = byte(sum >> 8)
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packet[11] = byte(sum)
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return packet
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}
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func ipv4HeaderChecksum(header []byte) uint16 {
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var sum uint32
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for i := 0; i+1 < len(header); i += 2 {
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if i == 10 {
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continue
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}
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sum += uint32(header[i])<<8 | uint32(header[i+1])
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}
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for sum > 0xffff {
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sum = (sum & 0xffff) + (sum >> 16)
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}
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return ^uint16(sum)
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}
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func min(a, b int) int {
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if a < b {
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return a
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}
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return b
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}
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