# # @ohos.net.ethernet (Ethernet Connection Management)

The **ethernet** module provides wired network capabilities, which allow users to set the IP address, subnet mask, gateway, and Domain Name System (DNS) server, and HTTP proxy of a wired network.

> **NOTE**
> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.

## Modules to Import

```js
import ethernet from '@ohos.net.ethernet'
```

## ethernet.setIfaceConfig<sup>9+</sup>

setIfaceConfig(iface: string, ic: InterfaceConfiguration, callback: AsyncCallback\<void>): void

Sets the network interface configuration. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permissions**: ohos.permission.CONNECTIVITY_INTERNAL

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name  | Type                                             | Mandatory| Description                                      |
| -------- | ------------------------------------------------- | ---- | ------------------------------------------ |
| iface    | string                                            | Yes  | Interface name.                                    |
| ic       | [InterfaceConfiguration](#interfaceconfiguration) | Yes  | Network interface configuration to set.                  |
| callback | AsyncCallback\<void>                     | Yes  | Callback used to return the result. If the operation is successful, the return result is empty. If the operation fails, an error code is returned.|

**Error codes**

| ID| Error Message                                |
| ------- | ----------------------------------------|
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201004 | Invalid Ethernet profile.  |
| 2201005 | Device information does not exist.  |
| 2201006 | Ethernet device not connected.                    |
| 2201007 | Ethernet failed to write user configuration information.    |

**Example**

```js
ethernet.setIfaceConfig("eth0", {
  mode: 0,
  ipAddr: "192.168.xx.xxx",
  route: "192.168.xx.xxx",
  gateway: "192.168.xx.xxx",
  netMask: "255.255.255.0",
  dnsServers: "1.1.1.1",
  httpProxy: {
    host: "180.89.xx.xx",
    port: 8080,
    exclusionList: {"example.com","192.168.0.1"}
  }
}, (error) => {
  if (error) {
    console.log("setIfaceConfig callback error = " + JSON.stringify(error));
  } else {
    console.log("setIfaceConfig callback ok ");
  }
});
```

## ethernet.setIfaceConfig<sup>9+</sup>

setIfaceConfig(iface: string, ic: InterfaceConfiguration): Promise\<void>

Sets the network interface configuration. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permissions**: ohos.permission.CONNECTIVITY_INTERNAL

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name| Type                                             | Mandatory| Description                    |
| ------ | ------------------------------------------------- | ---- | ------------------------ |
| iface  | string                                            | Yes  | Interface name.                  |
| ic     | [InterfaceConfiguration](#interfaceconfiguration) | Yes  | Network interface configuration to set.|

**Return value**

| Type               | Description                                                       |
| ------------------- | ----------------------------------------------------------- |
| Promise\<void>       | Promise used to return the result. If the operation is successful, the return result is empty. If the operation fails, an error code is returned.|

**Error codes**

| ID| Error Message                                |
| ------- | ----------------------------------------|
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201004 | Invalid Ethernet profile.  |
| 2201005 | Device information does not exist.  |
| 2201006 | Ethernet device not connected.                    |
| 2201007 | Ethernet failed to write user configuration information.    |

**Example**

```js
ethernet.setIfaceConfig("eth0", {
  mode: 0,
  ipAddr: "192.168.xx.xxx",
  route: "192.168.xx.xxx",
  gateway: "192.168.xx.xxx",
  netMask: "255.255.255.0",
  dnsServers: "1.1.1.1",
  httpProxy: {
    host: "180.89.xx.xx",
    port: 8080,
    exclusionList: {"example.com","192.168.0.1"}
  }
}).then(() => {
  console.log("setIfaceConfig promise ok ");
}).catch(error => {
  console.log("setIfaceConfig promise error = " + JSON.stringify(error));
});
```

## ethernet.getIfaceConfig<sup>9+</sup>

getIfaceConfig(iface: string, callback: AsyncCallback\<InterfaceConfiguration>): void

Obtains the configuration of a network interface. This API uses an asynchronous callback to return the result. 

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_NETWORK_INFO

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name  | Type                                           | Mandatory | Description        |
| -------- | ----------------------------------------------- | ----- | ------------ |
| iface    | string                                          | Yes   | Interface name.|
| callback | AsyncCallback\<[InterfaceConfiguration](#interfaceconfiguration)> | Yes   | Callback used to return the result.  |

**Error codes**

| ID| Error Message                                |
| ------- | ----------------------------------------|
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | Device information does not exist.  |

**Example**

```js
ethernet.getIfaceConfig("eth0", (error, value) => {
  if (error) {
    console.log("getIfaceConfig  callback error = " + JSON.stringify(error));
  } else {
    console.log("getIfaceConfig callback mode = " + JSON.stringify(value.mode));
    console.log("getIfaceConfig callback ipAddr = " + JSON.stringify(value.ipAddr));
    console.log("getIfaceConfig callback route = " + JSON.stringify(value.route));
    console.log("getIfaceConfig callback gateway = " + JSON.stringify(value.gateway));
    console.log("getIfaceConfig callback netMask = " + JSON.stringify(value.netMask));
    console.log("getIfaceConfig callback dnsServers = " + JSON.stringify(value.dnsServers));
  }
});
```

## ethernet.getIfaceConfig<sup>9+</sup>

getIfaceConfig(iface: string): Promise\<InterfaceConfiguration>

Obtains the configuration of a network interface. This API uses a promise to return the result. 

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_NETWORK_INFO

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name  | Type                                   | Mandatory| Description        |
| -------- | --------------------------------------- | ---- | ------------ |
| iface    | string                                  | Yes  | Interface name.|

**Return value**

| Type                             | Description                              |
| --------------------------------- | ---------------------------------- |
| Promise\<[InterfaceConfiguration](#interfaceconfiguration)>   | Promise used to return the result.       |

**Error codes**

| ID| Error Message                                |
| ------- | ----------------------------------------|
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | Device information does not exist.  |

**Example**

```js
ethernet.getIfaceConfig("eth0").then((data) => {
  console.log("getIfaceConfig promise mode = " + JSON.stringify(data.mode));
  console.log("getIfaceConfig promise ipAddr = " + JSON.stringify(data.ipAddr));
  console.log("getIfaceConfig promise route = " + JSON.stringify(data.route));
  console.log("getIfaceConfig promise gateway = " + JSON.stringify(data.gateway));
  console.log("getIfaceConfig promise netMask = " + JSON.stringify(data.netMask));
  console.log("getIfaceConfig promise dnsServers = " + JSON.stringify(data.dnsServers));
}).catch(error => {
  console.log("getIfaceConfig promise error = " + JSON.stringify(error));
});
```

## ethernet.isIfaceActive<sup>9+</sup>

isIfaceActive(iface: string, callback: AsyncCallback\<number>): void

Checks whether a network interface is active. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_NETWORK_INFO

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name  | Type                       | Mandatory| Description                                              |
| -------- | --------------------------- | ---- | -------------------------------------------------- |
| iface    | string                      | Yes  | Interface name. If this parameter is left empty, the API checks for any active network interface.            |
| callback | AsyncCallback\<number>       | Yes  | Callback used to return the result. The value **1** means that the network interface is active, **0** means that the network interface is inactive, and any other value means that an error has occurred.|

**Error codes**

| ID| Error Message                                |
| ------- | ----------------------------------------|
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | Device information does not exist.  |

**Example**

```js
ethernet.isIfaceActive("eth0", (error, value) => {
  if (error) {
    console.log("whether2Activate callback error = " + JSON.stringify(error));
  } else {
    console.log("whether2Activate callback = " + JSON.stringify(value));
  }
});
```

## ethernet.isIfaceActive<sup>9+</sup>

isIfaceActive(iface: string): Promise\<number>

Checks whether a network interface is active. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_NETWORK_INFO

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name| Type  | Mandatory| Description                                  |
| ------ | ------ | ---- | -------------------------------------- |
| iface  | string | Yes  | Interface name. If this parameter is left empty, the API checks for any active network interface.|

**Return value**

| Type           | Description                                                              |
| ----------------| ------------------------------------------------------------------ |
| Promise\<number> | Promise used to return the result. The value **1** means that the network interface is active, **0** means that the network interface is inactive, and any other value means that an error has occurred.|

**Error codes**

| ID| Error Message                                |
| ------- | ----------------------------------------|
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | Device information does not exist.  |

**Example**

```js
ethernet.isIfaceActive("eth0").then((data) => {
  console.log("isIfaceActive promise = " + JSON.stringify(data));
}).catch(error => {
  console.log("isIfaceActive promise error = " + JSON.stringify(error));
});
```

## ethernet.getAllActiveIfaces<sup>9+</sup>

getAllActiveIfaces(callback: AsyncCallback\<Array\<string>>): void

Obtains the list of all active network interfaces. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_NETWORK_INFO

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name  | Type                                | Mandatory| Description                          |
| -------- | ------------------------------------ | ---- | ------------------------------ |
| callback | AsyncCallback\<Array\<string>>         | Yes  | Callback used to return the result.|

**Error codes**

| ID| Error Message                                |
| ------- | ----------------------------------------|
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |

**Example**

```js
ethernet.getAllActiveIfaces((error, value) => {
  if (error) {
    console.log("getAllActiveIfaces callback error = " + JSON.stringify(error));
  } else {
    console.log("getAllActiveIfaces callback value.length = " + JSON.stringify(value.length));
    for (let i = 0; i < value.length; i++) {
      console.log("getAllActiveIfaces callback = " + JSON.stringify(value[i]));
    }
  }
});
```

## ethernet.getAllActiveIfaces<sup>9+</sup>

getAllActiveIfaces(): Promise\<Array\<string>>

Obtains the list of all active network interfaces. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_NETWORK_INFO

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Return value**

| Type                          | Description                                           |
| ------------------------------ | ----------------------------------------------- |
| Promise\<Array\<string>>         | Promise used to return the result.  |

**Error codes**

| ID| Error Message                                |
| ------- | ----------------------------------------|
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |

**Example**

```js
ethernet.getAllActiveIfaces().then((data) => {
  console.log("getAllActiveIfaces promise data.length = " + JSON.stringify(data.length));
  for (let i = 0; i < data.length; i++) {
    console.log("getAllActiveIfaces promise  = " + JSON.stringify(data[i]));
  }
}).catch(error => {
  console.log("getAllActiveIfaces promise error = " + JSON.stringify(error));
});
```

## ethernet.on('interfaceStateChange')<sup>10+</sup>

on(type: 'interfaceStateChange', callback: Callback\<{ iface: string, active: boolean }\>): void

Registers an observer for NIC hot swap events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_NETWORK_INFO

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name  | Type                                   | Mandatory| Description      |
| -------- | --------------------------------------- | ---- | ---------- |
| type     | string                  | Yes  | Event type. The value is **interfaceStateChange**.|
| callback | AsyncCallback\<{ iface: string, active: boolean }\> | Yes  | Callback used to return the result.<br>**iface**: NIC name.<br>**active**: whether the NIC is active. The value **true** indicates that the NIC is active, and the value **false** indicates the opposite.|

**Error codes**

| ID| Error Message                                     |
| ------- | -------------------------------------------- |
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 401     | Parameter error.                     |

**Example**

```js
 ethernet.on('interfaceStateChange', (data) => {
  console.log('on interfaceSharingStateChange: ' + JSON.stringify(data));
});
```

## ethernet.off('interfaceStateChange')<sup>10+</sup>

off(type: 'interfaceStateChange', callback?: Callback\<{ iface: string, active: boolean }\>): void

Unregisters the observer for NIC hot swap events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_NETWORK_INFO

**System capability**: SystemCapability.Communication.NetManager.Ethernet

**Parameters**

| Name  | Type                                   | Mandatory| Description      |
| -------- | --------------------------------------- | ---- | ---------- |
| type     | string                  | Yes  | Event type. The value is **interfaceStateChange**.|
| callback | AsyncCallback\<{ iface: string, active: boolean }> | No  | Callback used to return the result.<br>**iface**: NIC name.<br>**active**: whether the NIC is active. The value **true** indicates that the NIC is active, and the value **false** indicates the opposite.|

**Error codes**

| ID| Error Message                                     |
| ------- | -------------------------------------------- |
| 201     | Permission denied.                      |
| 202     | Non-system applications use system APIs.                      |
| 401     | Parameter error.                     |

**Example**

```js
ethernet.off('interfaceStateChange');
```

## InterfaceConfiguration<sup>9+</sup>

Defines the network configuration for the Ethernet connection.

**System API**: This is a system API.

**System capability**: SystemCapability.Communication.NetManager.Ethernet

| Name         | Type                   | Mandatory| Description                                                        |
| ------------ | ----------------------- | ---|------------------------------------------------------------ |
| mode         | [IPSetMode](#ipsetmode) | Yes| Configuration mode of the Ethernet connection.|
| ipAddr       | string                  | Yes| Static IP address of the Ethernet connection. The value must be an IPv4 address, which is a 32-bit number displayed in dotted decimal notation and each 8-bit field ranges from 0 to 255. This parameter does not need to be configured in Dynamic Host Configuration Protocol (DHCP) mode.|
| route        | string                  | Yes| Route of the Ethernet connection. The value must be an IPv4 address, which is a 32-bit number displayed in dotted decimal notation and each 8-bit field ranges from 0 to 255. This parameter does not need to be configured in DHCP mode.|
| gateway      | string                  | Yes| Gateway of the Ethernet connection. The value must be an IPv4 address, which is a 32-bit number displayed in dotted decimal notation and each 8-bit field ranges from 0 to 255. This parameter does not need to be configured in DHCP mode.|
| netMask      | string                  | Yes| Subnet mask of the Ethernet connection. The value must be an IPv4 address, which is a 32-bit number displayed in dotted decimal notation and each 8-bit field ranges from 0 to 255. This parameter does not need to be configured in DHCP mode.|
| dnsServers   | string                  | Yes| DNS server addresses of the Ethernet connection. The value must be an IPv4 address. This parameter does not need to be configured in DHCP mode. Multiple addresses are separated by commas (,).|
| httpProxy<sup>10+</sup> | [HttpProxy](js-apis-net-connection.md#httpproxy) | No| HTTP proxy of the Ethernet connection. By default, no proxy is configured.|

## IPSetMode<sup>9+</sup>

Defines the configuration mode of the Ethernet connection.

**System API**: This is a system API.

**System capability**: SystemCapability.Communication.NetManager.Ethernet

| Name                 | Value  | Description                  |
| ------------------------ | ---- | ---------------------- |
| STATIC | 0 | Static configuration.|
| DHCP   | 1 | Dynamic configuration.|