enable ipv6 network configuration options

enable the ipv6 flag in podman network to be able to create
dual-stack networks for containers.

This is required to be compatible with docker, where --ipv6
really means dual stack.

podman, unlike docker, support IPv6 only containers since
07e3f1bba9674c0cb93a0fa260930bfebbf75728.

Signed-off-by: Antonio Ojea <aojea@redhat.com>

1 files changed, 131 insertions, 0 deletions

diff --git a/libpod/network/create_test.go b/libpod/network/create_test.go
new file mode 100644
index 000000000..16188e497
--- /dev/null
+++ b/libpod/network/create_test.go
@@ -0,0 +1,131 @@
+package network
+
+import (
+	"net"
+	"testing"
+
+	"github.com/containers/podman/v2/pkg/domain/entities"
+)
+
+func Test_validateBridgeOptions(t *testing.T) {
+
+	tests := []struct {
+		name    string
+		subnet  net.IPNet
+		ipRange net.IPNet
+		gateway net.IP
+		isIPv6  bool
+		wantErr bool
+	}{
+		{
+			name:   "IPv4 subnet only",
+			subnet: net.IPNet{IP: net.IPv4(192, 168, 0, 0), Mask: net.IPv4Mask(255, 255, 255, 0)},
+		},
+		{
+			name:    "IPv4 subnet and range",
+			subnet:  net.IPNet{IP: net.IPv4(192, 168, 0, 0), Mask: net.IPv4Mask(255, 255, 255, 0)},
+			ipRange: net.IPNet{IP: net.IPv4(192, 168, 0, 128), Mask: net.IPv4Mask(255, 255, 255, 128)},
+		},
+		{
+			name:    "IPv4 subnet and gateway",
+			subnet:  net.IPNet{IP: net.IPv4(192, 168, 0, 0), Mask: net.IPv4Mask(255, 255, 255, 0)},
+			gateway: net.ParseIP("192.168.0.10"),
+		},
+		{
+			name:    "IPv4 subnet, range and gateway",
+			subnet:  net.IPNet{IP: net.IPv4(192, 168, 0, 0), Mask: net.IPv4Mask(255, 255, 255, 0)},
+			ipRange: net.IPNet{IP: net.IPv4(192, 168, 0, 128), Mask: net.IPv4Mask(255, 255, 255, 128)},
+			gateway: net.ParseIP("192.168.0.10"),
+		},
+		{
+			name:   "IPv6 subnet only",
+			subnet: net.IPNet{IP: net.ParseIP("2001:DB8::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff::"))},
+		},
+		{
+			name:    "IPv6 subnet and range",
+			subnet:  net.IPNet{IP: net.ParseIP("2001:DB8::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff::"))},
+			ipRange: net.IPNet{IP: net.ParseIP("2001:DB8:0:0:1::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff:ffff::"))},
+			isIPv6:  true,
+		},
+		{
+			name:    "IPv6 subnet and gateway",
+			subnet:  net.IPNet{IP: net.ParseIP("2001:DB8::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff::"))},
+			gateway: net.ParseIP("2001:DB8::2"),
+			isIPv6:  true,
+		},
+		{
+			name:    "IPv6 subnet, range and gateway",
+			subnet:  net.IPNet{IP: net.ParseIP("2001:DB8::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff::"))},
+			ipRange: net.IPNet{IP: net.ParseIP("2001:DB8:0:0:1::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff:ffff::"))},
+			gateway: net.ParseIP("2001:DB8::2"),
+			isIPv6:  true,
+		},
+		{
+			name:    "IPv6 subnet, range and gateway without IPv6 option (PODMAN SUPPORTS IT UNLIKE DOCKEr)",
+			subnet:  net.IPNet{IP: net.ParseIP("2001:DB8::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff::"))},
+			ipRange: net.IPNet{IP: net.ParseIP("2001:DB8:0:0:1::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff:ffff::"))},
+			gateway: net.ParseIP("2001:DB8::2"),
+			isIPv6:  false,
+		},
+		{
+			name:    "range provided but not subnet",
+			ipRange: net.IPNet{IP: net.IPv4(192, 168, 0, 128), Mask: net.IPv4Mask(255, 255, 255, 128)},
+			wantErr: true,
+		},
+		{
+			name:    "gateway provided but not subnet",
+			gateway: net.ParseIP("192.168.0.10"),
+			wantErr: true,
+		},
+		{
+			name:    "IPv4 subnet but IPv6 required",
+			subnet:  net.IPNet{IP: net.IPv4(192, 168, 0, 0), Mask: net.IPv4Mask(255, 255, 255, 0)},
+			ipRange: net.IPNet{IP: net.IPv4(192, 168, 0, 128), Mask: net.IPv4Mask(255, 255, 255, 128)},
+			gateway: net.ParseIP("192.168.0.10"),
+			isIPv6:  true,
+			wantErr: true,
+		},
+		{
+			name:    "IPv6 required but IPv4 options used",
+			subnet:  net.IPNet{IP: net.IPv4(192, 168, 0, 0), Mask: net.IPv4Mask(255, 255, 255, 0)},
+			ipRange: net.IPNet{IP: net.IPv4(192, 168, 0, 128), Mask: net.IPv4Mask(255, 255, 255, 128)},
+			gateway: net.ParseIP("192.168.0.10"),
+			isIPv6:  true,
+			wantErr: true,
+		},
+		{
+			name:    "IPv6 required but not subnet provided",
+			isIPv6:  true,
+			wantErr: true,
+		},
+		{
+			name:    "range out of the subnet",
+			subnet:  net.IPNet{IP: net.ParseIP("2001:DB8::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff::"))},
+			ipRange: net.IPNet{IP: net.ParseIP("2001:1:1::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff:ffff::"))},
+			gateway: net.ParseIP("2001:DB8::2"),
+			isIPv6:  true,
+			wantErr: true,
+		},
+		{
+			name:    "gateway out of the subnet",
+			subnet:  net.IPNet{IP: net.ParseIP("2001:DB8::"), Mask: net.IPMask(net.ParseIP("ffff:ffff:ffff::"))},
+			gateway: net.ParseIP("2001::2"),
+			isIPv6:  true,
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			options := entities.NetworkCreateOptions{
+				Subnet:  tt.subnet,
+				Range:   tt.ipRange,
+				Gateway: tt.gateway,
+				IPv6:    tt.isIPv6,
+			}
+			if err := validateBridgeOptions(options); (err != nil) != tt.wantErr {
+				t.Errorf("validateBridgeOptions() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}