include cidr block range in the infrastructure data

test/e2e/pkg/infrastructure.go

@@ -7,6 +7,14 @@ import (
 	"os"
 )
 
+const (
+	dockerIPv4CIDR = "10.186.73.0/24"
+	dockerIPv6CIDR = "fd80:b10c::/48"
+
+	globalIPv4CIDR = "0.0.0.0/0"
+	globalIPv6CIDR = "0:0::/0"
+)
+
 // InfrastructureData contains the relevant information for a set of existing
 // infrastructure that is to be used for running a testnet.
 type InfrastructureData struct {
@@ -21,6 +29,10 @@ type InfrastructureData struct {
 	// The key of the map is the name of the instance, which each must correspond
 	// to the names of one of the testnet nodes defined in the testnet manifest.
 	Instances map[string]InstanceData `json:"instances"`
+
+	// Network is the CIDR notation range of IP addresses that all of the instances'
+	// IP addresses are expected to be within.
+	Network string `json:"network"`
 }
 
 // InstanceData contains the relevant information for a machine instance backing
@@ -42,6 +54,7 @@ func NewDockerInfrastructureData(m Manifest) (InfrastructureData, error) {
 	ifd := InfrastructureData{
 		Provider:  "docker",
 		Instances: make(map[string]InstanceData),
+		Network:   netAddress,
 	}
 	for name := range m.Nodes {
 		ifd.Instances[name] = InstanceData{
@@ -58,5 +71,8 @@ func InfrastructureDataFromFile(p string) (InfrastructureData, error) {
 	if err != nil {
 		return InfrastructureData{}, err
 	}
+	if ifd.Network == "" {
+		ifd.Network = globalIPv4CIDR
+	}
 	return ifd, nil
 }

test/e2e/pkg/testnet.go

@@ -21,11 +21,6 @@ import (
 const (
 	randomSeed     int64  = 2308084734268
 	proxyPortFirst uint32 = 5701
-	dockerIPv4CIDR        = "10.186.73.0/24"
-	dockerIPv6CIDR        = "fd80:b10c::/48"
-
-	globalIPv4CIDR = "0.0.0.0/0"
-	globalIPv6CIDR = "0:0::/0"
 )
 
 type (
@@ -105,37 +100,18 @@ type Node struct {
 // random seed to generate e.g. keys.
 func LoadTestnet(manifest Manifest, fname string, ifd InfrastructureData) (*Testnet, error) {
 	dir := strings.TrimSuffix(fname, filepath.Ext(fname))
-
-	// Set up resource generators. These must be deterministic.
-	var netAddress string
-	switch ifd.Provider {
-	case "docker":
-		netAddress = dockerIPv4CIDR
-		if manifest.IPv6 {
-			netAddress = dockerIPv6CIDR
-		}
-	default:
-		// TODO(williambanfield): add list of CIDR blocks to the infrastructure
-		// data struct to allow tighter validation of IP addresses.
-		netAddress = globalIPv4CIDR
-		if manifest.IPv6 {
-			netAddress = globalIPv6CIDR
-		}
-	}
-	_, ipNet, err := net.ParseCIDR(netAddress)
-	if err != nil {
-		return nil, fmt.Errorf("invalid IP network address %q: %w", netAddress, err)
-	}
-
-	ipGen := newIPGenerator(ipNet)
 	keyGen := newKeyGenerator(randomSeed)
 	proxyPortGen := newPortGenerator(proxyPortFirst)
+	_, ipNet, err := net.ParseCIDR(ifd.Network)
+	if err != nil {
+		return nil, fmt.Errorf("invalid IP network address %q: %w", ifd.Network, err)
+	}
 
 	testnet := &Testnet{
 		Name:                 filepath.Base(dir),
 		File:                 fname,
 		Dir:                  dir,
-		IP:                   ipGen.Network(),
+		IP:                   ipNet,
 		InitialHeight:        1,
 		InitialState:         manifest.InitialState,
 		Validators:           map[*Node]int64{},

test/e2e/runner/main.go

@@ -73,7 +73,7 @@ func NewCLI() *CLI {
 				}
 				ifd, err = e2e.InfrastructureDataFromFile(p)
 				if err != nil {
-					return err
+					return fmt.Errorf("parsing infrastructure data: %s", err)
 				}
 			default:
 				return fmt.Errorf("unknown infrastructure type '%s'", inft)
@@ -81,7 +81,7 @@ func NewCLI() *CLI {
 
 			testnet, err := e2e.LoadTestnet(m, file, ifd)
 			if err != nil {
-				return err
+				return fmt.Errorf("loading testnet: %s", err)
 			}
 
 			cli.testnet = testnet