Add support for IPv6 network setting

Add IPv6 setting in network setting page.
- Add IPv6 domain name, DNS servers, NTP servers enable/disable
- Add DHCPv6 enable/disable
- Add IPv6 default gateway
- Add IPv6 addresses
- Add IPv6 static addresses
- Add IPv6 static addresses adding and deleting

Tested:
- IPv6 domain name, DNS servers, NTP servers enable/disable function
- DHCPv6 enable/disable function
- Verified the IPv6 default gateway
- IPv6 addresses adding and deleting
- Verified the IPv6 addresses in IPv6 table

Change-Id: I9eebf6ef5f7de748f79779d8168b8dcfcdda2495
Signed-off-by: Sean Zhang <xiazhang@nvidia.com>
diff --git a/src/views/Settings/Network/ModalDefaultGateway.vue b/src/views/Settings/Network/ModalDefaultGateway.vue
new file mode 100644
index 0000000..48c05c1
--- /dev/null
+++ b/src/views/Settings/Network/ModalDefaultGateway.vue
@@ -0,0 +1,114 @@
+<template>
+  <b-modal
+    id="modal-default-gateway"
+    ref="modal"
+    :title="$t('pageNetwork.modal.editIPv6DefaultGatewayTitle')"
+    @hidden="resetForm"
+  >
+    <b-form id="gateway-settings" @submit.prevent="handleSubmit">
+      <b-row>
+        <b-col sm="6">
+          <b-form-group
+            :label="$t('pageNetwork.gateway')"
+            label-for="defaultGateway"
+          >
+            <b-form-input
+              id="defaultGateway"
+              v-model.trim="form.defaultGateway"
+              data-test-id="network-input-gateway"
+              type="text"
+              :state="getValidationState($v.form.defaultGateway)"
+              @change="$v.form.defaultGateway.$touch()"
+            />
+            <b-form-invalid-feedback role="alert">
+              <div v-if="!$v.form.defaultGateway.required">
+                {{ $t('global.form.fieldRequired') }}
+              </div>
+              <div v-if="!$v.form.defaultGateway.validateGateway">
+                {{ $t('global.form.invalidFormat') }}
+              </div>
+            </b-form-invalid-feedback>
+          </b-form-group>
+        </b-col>
+      </b-row>
+    </b-form>
+    <template #modal-footer="{ cancel }">
+      <b-button variant="secondary" @click="cancel()">
+        {{ $t('global.action.cancel') }}
+      </b-button>
+      <b-button
+        form="gateway-settings"
+        type="submit"
+        variant="primary"
+        @click="onOk"
+      >
+        {{ $t('global.action.add') }}
+      </b-button>
+    </template>
+  </b-modal>
+</template>
+
+<script>
+import VuelidateMixin from '@/components/Mixins/VuelidateMixin.js';
+import { required, helpers } from 'vuelidate/lib/validators';
+
+const validateGateway = helpers.regex(
+  'validateGateway',
+  /^((?:[a-fA-F0-9]{1,4}:){7}[a-fA-F0-9]{1,4}|(?:[a-fA-F0-9]{1,4}:){1,7}:|(?:[a-fA-F0-9]{1,4}:){1,6}:[a-fA-F0-9]{1,4}|(?:[a-fA-F0-9]{1,4}:){1,5}(?::[a-fA-F0-9]{1,4}){1,2}|(?:[a-fA-F0-9]{1,4}:){1,4}(?::[a-fA-F0-9]{1,4}){1,3}|(?:[a-fA-F0-9]{1,4}:){1,3}(?::[a-fA-F0-9]{1,4}){1,4}|(?:[a-fA-F0-9]{1,4}:){1,2}(?::[a-fA-F0-9]{1,4}){1,5}|[a-fA-F0-9]{1,4}:(?::[a-fA-F0-9]{1,4}){1,6}|:(?::[a-fA-F0-9]{1,4}){1,7}|::|(?:[a-fA-F0-9]{1,4}:){6}(?:[0-9]{1,3}\.){3}[0-9]{1,3}|::(?:[a-fA-F0-9]{1,4}:){0,5}(?:[0-9]{1,3}\.){3}[0-9]{1,3}|(?:[a-fA-F0-9]{1,4}:){1,5}:(?:[0-9]{1,3}\.){3}[0-9]{1,3}|(?:[a-fA-F0-9]{1,4}:){1,4}:(?:[0-9]{1,3}\.){3}[0-9]{1,3}|(?:[a-fA-F0-9]{1,4}:){1,3}:(?:[0-9]{1,3}\.){3}[0-9]{1,3}|(?:[a-fA-F0-9]{1,4}:){1,2}:(?:[0-9]{1,3}\.){3}[0-9]{1,3}|[a-fA-F0-9]{1,4}:(?:[0-9]{1,3}\.){3}[0-9]{1,3}|::(?:[0-9]{1,3}\.){3}[0-9]{1,3})$/,
+);
+
+export default {
+  mixins: [VuelidateMixin],
+  props: {
+    defaultGateway: {
+      type: String,
+      default: '',
+    },
+  },
+  data() {
+    return {
+      form: {
+        defaultGateway: '',
+      },
+    };
+  },
+  watch: {
+    defaultGateway() {
+      this.form.defaultGateway = this.defaultGateway;
+    },
+  },
+  validations() {
+    return {
+      form: {
+        defaultGateway: {
+          required,
+          validateGateway,
+        },
+      },
+    };
+  },
+  methods: {
+    handleSubmit() {
+      this.$v.$touch();
+      if (this.$v.$invalid) return;
+      this.$emit('ok', { IPv6DefaultGateway: this.form.defaultGateway });
+      this.closeModal();
+    },
+    closeModal() {
+      this.$nextTick(() => {
+        this.$refs.modal.hide();
+      });
+    },
+    resetForm() {
+      this.form.defaultGateway = this.defaultGateway;
+      this.$v.$reset();
+      this.$emit('hidden');
+    },
+    onOk(bvModalEvt) {
+      // prevent modal close
+      bvModalEvt.preventDefault();
+      this.handleSubmit();
+    },
+  },
+};
+</script>