Feat/pseudo dhcp (#109)

* ✨ feat: pseudo dhcp

easytier-gui/locales/cn.yml

@@ -4,6 +4,7 @@ public_server: 公共服务器
 manual: 手动
 standalone: 独立
 virtual_ipv4: 虚拟IPv4地址
+virtual_ipv4_dhcp: DHCP
 network_name: 网络名称
 network_secret: 网络密码
 public_server_url: 公共服务器地址
@@ -59,3 +60,4 @@ run_network: 运行网络
 stop_network: 停止网络
 network_running: 运行中
 network_stopped: 已停止
+dhcp_experimental_warning: 实验性警告！使用DHCP时如果组网环境中发生IP冲突，将自动更改IP。

easytier-gui/locales/en.yml

@@ -4,6 +4,7 @@ public_server: Public Server
 manual: Manual
 standalone: Standalone
 virtual_ipv4: Virtual IPv4
+virtual_ipv4_dhcp: DHCP
 network_name: Network Name
 network_secret: Network Secret
 public_server_url: Public Server URL
@@ -59,3 +60,4 @@ run_network: Run Network
 stop_network: Stop Network
 network_running: running
 network_stopped: stopped
+dhcp_experimental_warning: Experimental warning! if there is an IP conflict in the network when using DHCP, the IP will be automatically changed.

easytier-gui/src-tauri/src/main.rs

@@ -41,6 +41,7 @@ impl Default for NetworkingMethod {
 struct NetworkConfig {
     instance_id: String,
 
+    dhcp: bool,
     virtual_ipv4: String,
     hostname: Option<String>,
     network_name: String,
@@ -53,7 +54,7 @@ struct NetworkConfig {
     proxy_cidrs: Vec<String>,
 
     enable_vpn_portal: bool,
-    vpn_portal_listne_port: i32,
+    vpn_portal_listen_port: i32,
     vpn_portal_client_network_addr: String,
     vpn_portal_client_network_len: i32,
 
@@ -72,18 +73,19 @@ impl NetworkConfig {
                 .with_context(|| format!("failed to parse instance id: {}", self.instance_id))?,
         );
         cfg.set_hostname(self.hostname.clone());
+        cfg.set_dhcp(self.dhcp);
         cfg.set_inst_name(self.network_name.clone());
         cfg.set_network_identity(NetworkIdentity::new(
             self.network_name.clone(),
             self.network_secret.clone(),
         ));
 
-        if self.virtual_ipv4.len() > 0 {
+        if !self.dhcp {
-            cfg.set_ipv4(
+            if self.virtual_ipv4.len() > 0 {
-                self.virtual_ipv4.parse().with_context(|| {
+                cfg.set_ipv4(Some(self.virtual_ipv4.parse().with_context(|| {
                     format!("failed to parse ipv4 address: {}", self.virtual_ipv4)
-                })?,
+                })?))
-            )
+            }
         }
 
         match self.networking_method {
@@ -150,12 +152,12 @@ impl NetworkConfig {
                 client_cidr: cidr
                     .parse()
                     .with_context(|| format!("failed to parse vpn portal client cidr: {}", cidr))?,
-                wireguard_listen: format!("0.0.0.0:{}", self.vpn_portal_listne_port)
+                wireguard_listen: format!("0.0.0.0:{}", self.vpn_portal_listen_port)
                     .parse()
                     .with_context(|| {
                         format!(
                             "failed to parse vpn portal wireguard listen port. {}",
-                            self.vpn_portal_listne_port
+                            self.vpn_portal_listen_port
                         )
                     })?,
             });

easytier-gui/src/components/Config.vue

@@ -2,7 +2,6 @@
 import InputGroup from 'primevue/inputgroup'
 import InputGroupAddon from 'primevue/inputgroupaddon'
 import { getOsHostname } from '~/composables/network'
-import { i18n } from '~/modules/i18n'
 import { NetworkingMethod } from '~/types/network'
 
 const props = defineProps<{
@@ -12,10 +11,12 @@ const props = defineProps<{
 
 defineEmits(['runNetwork'])
 
+const { t } = useI18n()
+
 const networking_methods = ref([
-  { value: NetworkingMethod.PublicServer, label: i18n.global.t('public_server') },
+  { value: NetworkingMethod.PublicServer, label: t('public_server') },
-  { value: NetworkingMethod.Manual, label: i18n.global.t('manual') },
+  { value: NetworkingMethod.Manual, label: t('manual') },
-  { value: NetworkingMethod.Standalone, label: i18n.global.t('standalone') },
+  { value: NetworkingMethod.Standalone, label: t('standalone') },
 ])
 
 const networkStore = useNetworkStore()
@@ -56,14 +57,29 @@ onMounted(async () => {
 <template>
   <div class="flex flex-column h-full">
     <div class="flex flex-column">
+      <div class="w-7/12 self-center ">
+        <Message severity="warn">
+          {{ $t('dhcp_experimental_warning') }}
+        </Message>
+      </div>
       <div class="w-7/12 self-center ">
         <Panel :header="$t('basic_settings')">
           <div class="flex flex-column gap-y-2">
             <div class="flex flex-row gap-x-9 flex-wrap">
               <div class="flex flex-column gap-2 basis-5/12 grow">
-                <label for="virtual_ip">{{ $t('virtual_ipv4') }}</label>
+                <div class="flex align-items-center" for="virtual_ip">
+                  <label class="mr-2"> {{ $t('virtual_ipv4') }} </label>
+                  <Checkbox v-model="curNetwork.dhcp" input-id="virtual_ip_auto" :binary="true" />
+
+                  <label for="virtual_ip_auto" class="ml-2">
+                    {{ t('virtual_ipv4_dhcp') }}
+                  </label>
+                </div>
                 <InputGroup>
-                  <InputText id="virtual_ip" v-model="curNetwork.virtual_ipv4" aria-describedby="virtual_ipv4-help" />
+                  <InputText
+                    id="virtual_ip" v-model="curNetwork.virtual_ipv4" :disabled="curNetwork.dhcp"
+                    aria-describedby="virtual_ipv4-help"
+                  />
                   <InputGroupAddon>
                     <span>/24</span>
                   </InputGroupAddon>
@@ -112,7 +128,7 @@ onMounted(async () => {
 
         <Divider />
 
-        <Panel :header="$t('advanced_settings')" toggleable>
+        <Panel :header="$t('advanced_settings')" toggleable collapsed>
           <div class="flex flex-column gap-y-2">
             <div class="flex flex-row gap-x-9 flex-wrap">
               <div class="flex flex-column gap-2 basis-5/12 grow">
@@ -154,7 +170,7 @@ onMounted(async () => {
                     </InputGroup>
                   </div>
                   <InputNumber
-                    v-if="curNetwork.enable_vpn_portal" v-model="curNetwork.vpn_portal_listne_port"
+                    v-if="curNetwork.enable_vpn_portal" v-model="curNetwork.vpn_portal_listen_port"
                     :placeholder="$t('vpn_portal_listen_port')" class="" :format="false" :min="0" :max="65535"
                   />
                 </div>

easytier-gui/src/components/Status.vue

@@ -24,7 +24,7 @@ const curNetworkInst = computed(() => {
 
 const peerRouteInfos = computed(() => {
   if (curNetworkInst.value)
-    return curNetworkInst.value.detail.peer_route_pairs
+    return curNetworkInst.value.detail?.peer_route_pairs || []
 
   return []
 })
@@ -116,6 +116,13 @@ const myNodeInfoChips = computed(() => {
   if (!my_node_info)
     return chips
 
+  // virtual ipv4
+
+  chips.push({
+    label: `Virtual IPv4: ${my_node_info.virtual_ipv4}`,
+    icon: '',
+  } as Chip)
+
   // local ipv4s
   const local_ipv4s = my_node_info.ips?.interface_ipv4s
   for (const [idx, ip] of local_ipv4s?.entries()) {
@@ -290,82 +297,84 @@ function showEventLogs() {
       </template>
     </Card>
 
-    <Card v-if="!curNetworkInst?.error_msg">
+    <template v-else>
-      <template #title>
+      <Card>
-        {{ $t('my_node_info') }}
+        <template #title>
-      </template>
+          {{ $t('my_node_info') }}
-      <template #content>
+        </template>
-        <div class="flex w-full flex-column gap-y-5">
+        <template #content>
-          <div class="m-0 flex flex-row justify-center gap-x-5">
+          <div class="flex w-full flex-column gap-y-5">
-            <div
+            <div class="m-0 flex flex-row justify-center gap-x-5">
-              class="rounded-full w-32 h-32 flex flex-column align-items-center pt-4"
+              <div
-              style="border: 1px solid green"
+                class="rounded-full w-32 h-32 flex flex-column align-items-center pt-4"
-            >
+                style="border: 1px solid green"
-              <div class="font-bold">
+              >
-                {{ $t('peer_count') }}
+                <div class="font-bold">
+                  {{ $t('peer_count') }}
+                </div>
+                <div class="text-5xl mt-1">
+                  {{ peerCount }}
+                </div>
               </div>
-              <div class="text-5xl mt-1">
+
-                {{ peerCount }}
+              <div
+                class="rounded-full w-32 h-32 flex flex-column align-items-center pt-4"
+                style="border: 1px solid purple"
+              >
+                <div class="font-bold">
+                  {{ $t('upload') }}
+                </div>
+                <div class="text-xl mt-2">
+                  {{ txRate }}/s
+                </div>
+              </div>
+
+              <div
+                class="rounded-full w-32 h-32 flex flex-column align-items-center pt-4"
+                style="border: 1px solid fuchsia"
+              >
+                <div class="font-bold">
+                  {{ $t('download') }}
+                </div>
+                <div class="text-xl mt-2">
+                  {{ rxRate }}/s
+                </div>
               </div>
             </div>
 
-            <div
+            <div class="flex flex-row align-items-center flex-wrap w-full">
-              class="rounded-full w-32 h-32 flex flex-column align-items-center pt-4"
+              <Chip
-              style="border: 1px solid purple"
+                v-for="(chip, i) in myNodeInfoChips" :key="i" :label="chip.label" :icon="chip.icon"
-            >
+                class="mr-2 mt-2"
-              <div class="font-bold">
+              />
-                {{ $t('upload') }}
-              </div>
-              <div class="text-xl mt-2">
-                {{ txRate }}/s
-              </div>
             </div>
 
-            <div
+            <div v-if="myNodeInfo" class="m-0 flex flex-row justify-center gap-x-5 text-sm">
-              class="rounded-full w-32 h-32 flex flex-column align-items-center pt-4"
+              <Button severity="info" :label="$t('show_vpn_portal_config')" @click="showVpnPortalConfig" />
-              style="border: 1px solid fuchsia"
+              <Button severity="info" :label="$t('show_event_log')" @click="showEventLogs" />
-            >
-              <div class="font-bold">
-                {{ $t('download') }}
-              </div>
-              <div class="text-xl mt-2">
-                {{ rxRate }}/s
-              </div>
             </div>
           </div>
+        </template>
+      </Card>
 
-          <div class="flex flex-row align-items-center flex-wrap w-full">
+      <Divider />
-            <Chip
-              v-for="(chip, i) in myNodeInfoChips" :key="i" :label="chip.label" :icon="chip.icon"
-              class="mr-2 mt-2"
-            />
-          </div>
 
-          <div v-if="myNodeInfo" class="m-0 flex flex-row justify-center gap-x-5 text-sm">
+      <Card>
-            <Button severity="info" :label="$t('show_vpn_portal_config')" @click="showVpnPortalConfig" />
+        <template #title>
-            <Button severity="info" :label="$t('show_event_log')" @click="showEventLogs" />
+          {{ $t('peer_info') }}
-          </div>
+        </template>
-        </div>
+        <template #content>
-      </template>
+          <DataTable :value="peerRouteInfos" column-resize-mode="fit" table-style="width: 100%">
-    </Card>
+            <Column field="route.ipv4_addr" style="width: 100px;" :header="$t('virtual_ipv4')" />
-
+            <Column field="route.hostname" style="max-width: 250px;" :header="$t('hostname')" />
-    <Divider />
+            <Column :field="routeCost" style="width: 100px;" :header="$t('route_cost')" />
-
+            <Column :field="latencyMs" style="width: 80px;" :header="$t('latency')" />
-    <Card v-if="!curNetworkInst?.error_msg">
+            <Column :field="txBytes" style="width: 80px;" :header="$t('upload_bytes')" />
-      <template #title>
+            <Column :field="rxBytes" style="width: 80px;" :header="$t('download_bytes')" />
-        {{ $t('peer_info') }}
+            <Column :field="lossRate" style="width: 100px;" :header="$t('loss_rate')" />
-      </template>
+          </DataTable>
-      <template #content>
+        </template>
-        <DataTable :value="peerRouteInfos" column-resize-mode="fit" table-style="width: 100%">
+      </Card>
-          <Column field="route.ipv4_addr" style="width: 100px;" :header="$t('virtual_ipv4')" />
+    </template>
-          <Column field="route.hostname" style="max-width: 250px;" :header="$t('hostname')" />
-          <Column :field="routeCost" style="width: 100px;" :header="$t('route_cost')" />
-          <Column :field="latencyMs" style="width: 80px;" :header="$t('latency')" />
-          <Column :field="txBytes" style="width: 80px;" :header="$t('upload_bytes')" />
-          <Column :field="rxBytes" style="width: 80px;" :header="$t('download_bytes')" />
-          <Column :field="lossRate" style="width: 100px;" :header="$t('loss_rate')" />
-        </DataTable>
-      </template>
-    </Card>
   </div>
 </template>

easytier-gui/src/pages/index.vue

@@ -52,7 +52,6 @@ enum Severity {
 
 const messageBarSeverity = ref(Severity.None)
 const messageBarContent = ref('')
-
 const toast = useToast()
 
 const networkStore = useNetworkStore()
@@ -108,12 +107,8 @@ onMounted(() => {
 })
 onUnmounted(() => clearInterval(intervalId))
 
-const curNetworkHasInstance = computed(() => {
-  return networkStore.networkInstanceIds.includes(networkStore.curNetworkId)
-})
-
 const activeStep = computed(() => {
-  return curNetworkHasInstance.value ? 1 : 0
+  return networkStore.networkInstanceIds.includes(networkStore.curNetworkId) ? 1 : 0
 })
 
 const setting_menu = ref()
@@ -190,8 +185,12 @@ function isRunning(id: string) {
                 <div class="flex items-start content-center">
                   <div class="mr-3">
                     <span>{{ slotProps.value.network_name }}</span>
-                    <span v-if="isRunning(slotProps.value.instance_id)" class="ml-3">
+                    <span
-                      {{ slotProps.value.virtual_ipv4 }}
+                      v-if="isRunning(slotProps.value.instance_id) && networkStore.instances[slotProps.value.instance_id].detail && (networkStore.instances[slotProps.value.instance_id].detail?.my_node_info.virtual_ipv4 !== '')"
+                      class="ml-3"
+                    >
+                      {{ networkStore.instances[slotProps.value.instance_id].detail
+                        ? networkStore.instances[slotProps.value.instance_id].detail?.my_node_info.virtual_ipv4 : '' }}
                     </span>
                   </div>
                   <Tag

easytier-gui/src/stores/network.ts

@@ -56,7 +56,7 @@ export const useNetworkStore = defineStore('networkStore', {
         instance_id: instanceId,
         running: false,
         error_msg: '',
-        detail: {} as NetworkInstanceRunningInfo,
+        detail: undefined,
       }
     },
 

easytier-gui/src/styles.css

@@ -31,3 +31,18 @@
   border-radius: 10px;
   margin-bottom: 1rem;
 }
+
+::-webkit-scrollbar {
+  width: 4px;
+  height: 4px;
+  border-radius: 4px;
+}
+
+::-webkit-scrollbar-track {
+  border-radius: 4px;
+}
+
+::-webkit-scrollbar-thumb {
+  border-radius: 4px;
+  background-color: #0000005d;
+}

easytier-gui/src/types/network.ts

@@ -9,6 +9,7 @@ export enum NetworkingMethod {
 export interface NetworkConfig {
   instance_id: string
 
+  dhcp: boolean
   virtual_ipv4: string
   hostname?: string
   network_name: string
@@ -17,18 +18,18 @@ export interface NetworkConfig {
   networking_method: NetworkingMethod
 
   public_server_url: string
-  peer_urls: Array<string>
+  peer_urls: string[]
 
-  proxy_cidrs: Array<string>
+  proxy_cidrs: string[]
 
   enable_vpn_portal: boolean
-  vpn_portal_listne_port: number
+  vpn_portal_listen_port: number
   vpn_portal_client_network_addr: string
   vpn_portal_client_network_len: number
 
   advanced_settings: boolean
 
-  listener_urls: Array<string>
+  listener_urls: string[]
   rpc_port: number
 }
 
@@ -36,8 +37,9 @@ export function DEFAULT_NETWORK_CONFIG(): NetworkConfig {
   return {
     instance_id: uuidv4(),
 
+    dhcp: false,
     virtual_ipv4: '',
-    network_name: 'default',
+    network_name: 'easytier',
     network_secret: '',
 
     networking_method: NetworkingMethod.PublicServer,
@@ -48,7 +50,7 @@ export function DEFAULT_NETWORK_CONFIG(): NetworkConfig {
     proxy_cidrs: [],
 
     enable_vpn_portal: false,
-    vpn_portal_listne_port: 22022,
+    vpn_portal_listen_port: 22022,
     vpn_portal_client_network_addr: '',
     vpn_portal_client_network_len: 24,
 
@@ -59,7 +61,7 @@ export function DEFAULT_NETWORK_CONFIG(): NetworkConfig {
       'udp://0.0.0.0:11010',
       'wg://0.0.0.0:11011',
     ],
-    rpc_port: 15888,
+    rpc_port: 0,
   }
 }
 
@@ -69,7 +71,7 @@ export interface NetworkInstance {
   running: boolean
   error_msg: string
 
-  detail: NetworkInstanceRunningInfo
+  detail?: NetworkInstanceRunningInfo
 }
 
 export interface NetworkInstanceRunningInfo {

easytier/src/common/config.rs

@@ -24,7 +24,10 @@ pub trait ConfigLoader: Send + Sync {
     fn set_netns(&self, ns: Option<String>);
 
     fn get_ipv4(&self) -> Option<std::net::Ipv4Addr>;
-    fn set_ipv4(&self, addr: std::net::Ipv4Addr);
+    fn set_ipv4(&self, addr: Option<std::net::Ipv4Addr>);
+
+    fn get_dhcp(&self) -> bool;
+    fn set_dhcp(&self, dhcp: bool);
 
     fn add_proxy_cidr(&self, cidr: cidr::IpCidr);
     fn remove_proxy_cidr(&self, cidr: cidr::IpCidr);
@@ -161,6 +164,7 @@ struct Config {
     instance_name: Option<String>,
     instance_id: Option<uuid::Uuid>,
     ipv4: Option<String>,
+    dhcp: Option<bool>,
     network_identity: Option<NetworkIdentity>,
     listeners: Option<Vec<url::Url>>,
 
@@ -280,8 +284,20 @@ impl ConfigLoader for TomlConfigLoader {
             .flatten()
     }
 
-    fn set_ipv4(&self, addr: std::net::Ipv4Addr) {
+    fn set_ipv4(&self, addr: Option<std::net::Ipv4Addr>) {
-        self.config.lock().unwrap().ipv4 = Some(addr.to_string());
+        self.config.lock().unwrap().ipv4 = if let Some(addr) = addr {
+            Some(addr.to_string())
+        } else {
+            None
+        };
+    }
+
+    fn get_dhcp(&self) -> bool {
+        self.config.lock().unwrap().dhcp.unwrap_or_default()
+    }
+
+    fn set_dhcp(&self, dhcp: bool) {
+        self.config.lock().unwrap().dhcp = Some(dhcp);
     }
 
     fn add_proxy_cidr(&self, cidr: cidr::IpCidr) {

easytier/src/common/global_ctx.rs

@@ -36,6 +36,9 @@ pub enum GlobalCtxEvent {
 
     VpnPortalClientConnected(String, String), // (portal, client ip)
     VpnPortalClientDisconnected(String, String), // (portal, client ip)
+
+    DhcpIpv4Changed(Option<std::net::Ipv4Addr>, Option<std::net::Ipv4Addr>), // (old, new)
+    DhcpIpv4Conflicted(Option<std::net::Ipv4Addr>),
 }
 
 type EventBus = tokio::sync::broadcast::Sender<GlobalCtxEvent>;
@@ -127,7 +130,7 @@ impl GlobalCtx {
         return addr;
     }
 
-    pub fn set_ipv4(&mut self, addr: std::net::Ipv4Addr) {
+    pub fn set_ipv4(&self, addr: Option<std::net::Ipv4Addr>) {
         self.config.set_ipv4(addr);
         self.cached_ipv4.store(None);
     }

easytier/src/easytier-core.rs

@@ -71,6 +71,13 @@ struct Cli {
     )]
     ipv4: Option<String>,
 
+    #[arg(
+        short,
+        long,
+        help = "automatically determine and set IP address by Easytier, and the IP address starts from 10.0.0.1 by default. Warning, if there is an IP conflict in the network when using DHCP, the IP will be automatically changed."
+    )]
+    dhcp: bool,
+
     #[arg(short, long, help = "peers to connect initially", num_args = 0..)]
     peers: Vec<String>,
 
@@ -271,12 +278,16 @@ impl From<Cli> for TomlConfigLoader {
             cli.network_secret.clone(),
         ));
 
-        if let Some(ipv4) = &cli.ipv4 {
+        cfg.set_dhcp(cli.dhcp);
-            cfg.set_ipv4(
+
-                ipv4.parse()
+        if !cli.dhcp {
-                    .with_context(|| format!("failed to parse ipv4 address: {}", ipv4))
+            if let Some(ipv4) = &cli.ipv4 {
-                    .unwrap(),
+                cfg.set_ipv4(Some(
-            )
+                    ipv4.parse()
+                        .with_context(|| format!("failed to parse ipv4 address: {}", ipv4))
+                        .unwrap(),
+                ))
+            }
         }
 
         cfg.set_peers(
@@ -503,6 +514,14 @@ pub async fn async_main(cli: Cli) {
                         portal, client_addr
                     ));
                 }
+
+                GlobalCtxEvent::DhcpIpv4Changed(old, new) => {
+                    print_event(format!("dhcp ip changed. old: {:?}, new: {:?}", old, new));
+                }
+
+                GlobalCtxEvent::DhcpIpv4Conflicted(ip) => {
+                    print_event(format!("dhcp ip conflict. ip: {:?}", ip));
+                }
             }
         }
     });

easytier/src/instance/instance.rs

@@ -1,10 +1,12 @@
 use std::borrow::BorrowMut;
+use std::collections::HashSet;
 use std::net::Ipv4Addr;
 use std::pin::Pin;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Weak};
 
 use anyhow::Context;
+use cidr::Ipv4Inet;
 use futures::{SinkExt, StreamExt};
 
 use pnet::packet::ipv4::Ipv4Packet;
@@ -285,6 +287,116 @@ impl Instance {
         Ok(())
     }
 
+    // Warning, if there is an IP conflict in the network when using DHCP, the IP will be automatically changed.
+    fn check_dhcp_ip_conflict(&self) {
+        use rand::Rng;
+        let peer_manager_c = self.peer_manager.clone();
+        let global_ctx_c = self.get_global_ctx();
+        let nic_c = self.virtual_nic.as_ref().unwrap().clone();
+        tokio::spawn(async move {
+            let default_ipv4_addr = Ipv4Addr::new(10, 0, 0, 0);
+            let mut dhcp_ip: Option<Ipv4Inet> = None;
+            let mut tries = 6;
+            loop {
+                let mut ipv4_addr: Option<Ipv4Inet> = None;
+                let mut unique_ipv4 = HashSet::new();
+
+                for i in 0..tries {
+                    if dhcp_ip.is_none() {
+                        tokio::time::sleep(std::time::Duration::from_millis(500)).await;
+                    }
+
+                    for route in peer_manager_c.list_routes().await {
+                        if !route.ipv4_addr.is_empty() {
+                            if let Ok(ip) = Ipv4Inet::new(
+                                if let Ok(ipv4) = route.ipv4_addr.parse::<Ipv4Addr>() {
+                                    ipv4
+                                } else {
+                                    default_ipv4_addr
+                                },
+                                24,
+                            ) {
+                                unique_ipv4.insert(ip);
+                            }
+                        }
+                    }
+
+                    if i == tries - 1 && unique_ipv4.is_empty() {
+                        unique_ipv4.insert(Ipv4Inet::new(default_ipv4_addr, 24).unwrap());
+                    }
+
+                    if let Some(ip) = dhcp_ip {
+                        if !unique_ipv4.contains(&ip) {
+                            ipv4_addr = dhcp_ip;
+                            break;
+                        }
+                    }
+
+                    for net in unique_ipv4.iter().map(|inet| inet.network()).take(1) {
+                        if let Some(ip) = net.iter().find(|ip| {
+                            ip.address() != net.first_address()
+                                && ip.address() != net.last_address()
+                                && !unique_ipv4.contains(ip)
+                        }) {
+                            ipv4_addr = Some(ip);
+                        }
+                    }
+                }
+
+                if dhcp_ip != ipv4_addr {
+                    let last_ip = dhcp_ip.map(|p| p.address());
+                    tracing::debug!("last_ip: {:?}", last_ip);
+                    let _ = nic_c.remove_ip(last_ip).await;
+                    #[cfg(target_os = "macos")]
+                    if last_ip.is_some() {
+                        let _g = global_ctx_c.net_ns.guard();
+                        let ret = nic_c
+                            .get_ifcfg()
+                            .remove_ipv4_route(nic_c.ifname(), last_ip.unwrap(), 24)
+                            .await;
+
+                        if ret.is_err() {
+                            tracing::trace!(
+                                cidr = 24,
+                                err = ?ret,
+                                "remove route failed.",
+                            );
+                        }
+                    }
+
+                    if let Some(ip) = ipv4_addr {
+                        let _ = nic_c.link_up().await;
+                        dhcp_ip = Some(ip);
+                        tries = 1;
+                        if let Err(e) = nic_c.add_ip(ip.address(), 24).await {
+                            tracing::error!("add ip failed: {:?}", e);
+                            global_ctx_c.set_ipv4(None);
+                            let sleep: u64 = rand::thread_rng().gen_range(200..500);
+                            tokio::time::sleep(std::time::Duration::from_millis(sleep)).await;
+                            continue;
+                        }
+                        #[cfg(target_os = "macos")]
+                        let _ = nic_c.add_route(ip.address(), 24).await;
+                        global_ctx_c.set_ipv4(Some(ip.address()));
+                        global_ctx_c.issue_event(GlobalCtxEvent::DhcpIpv4Changed(
+                            last_ip,
+                            Some(ip.address()),
+                        ));
+                    } else {
+                        global_ctx_c.set_ipv4(None);
+                        global_ctx_c.issue_event(GlobalCtxEvent::DhcpIpv4Conflicted(last_ip));
+                        dhcp_ip = None;
+                        tries = 6;
+                    }
+                }
+
+                let sleep: u64 = rand::thread_rng().gen_range(5..10);
+
+                tokio::time::sleep(std::time::Duration::from_secs(sleep)).await;
+            }
+        });
+    }
+
     pub async fn run(&mut self) -> Result<(), Error> {
         self.listener_manager
             .lock()
@@ -294,7 +406,11 @@ impl Instance {
         self.listener_manager.lock().await.run().await?;
         self.peer_manager.run().await?;
 
-        if let Some(ipv4_addr) = self.global_ctx.get_ipv4() {
+        if self.global_ctx.config.get_dhcp() {
+            self.prepare_tun_device().await?;
+            self.run_proxy_cidrs_route_updater();
+            self.check_dhcp_ip_conflict();
+        } else if let Some(ipv4_addr) = self.global_ctx.get_ipv4() {
             self.prepare_tun_device().await?;
             self.assign_ipv4_to_tun_device(ipv4_addr).await?;
             self.run_proxy_cidrs_route_updater();

easytier/src/tests/three_node.rs

@@ -48,7 +48,7 @@ pub fn get_inst_config(inst_name: &str, ns: Option<&str>, ipv4: &str) -> TomlCon
     let config = TomlConfigLoader::default();
     config.set_inst_name(inst_name.to_owned());
     config.set_netns(ns.map(|s| s.to_owned()));
-    config.set_ipv4(ipv4.parse().unwrap());
+    config.set_ipv4(Some(ipv4.parse().unwrap()));
     config.set_listeners(vec![
         "tcp://0.0.0.0:11010".parse().unwrap(),
         "udp://0.0.0.0:11010".parse().unwrap(),