# # @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 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

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.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | The device information does not exist.  |
| 2201006 | Device disconnected.                    |
| 2201007 | Failed to write the user configuration.    |

**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",
    domain: "2.2.2.2"
}, (error) => {
    if (error) {
        console.log("setIfaceConfig callback error = " + JSON.stringify(error));
    } else {
        console.log("setIfaceConfig callback ok ");
    }
});
```

## ethernet.setIfaceConfig

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.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | The device information does not exist.  |
| 2201006 | Device disconnected.                   |
| 2201007 | Failed to write the user configuration.    |

**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",
    domain: "2.2.2.2"
}).then(() => {
    console.log("setIfaceConfig promiss ok ");
}).catch(error => {
    console.log("setIfaceConfig promiss error = " + JSON.stringify(error));
});
```

## ethernet.getIfaceConfig

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.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | The 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));
        console.log("getIfaceConfig callback domain = " + JSON.stringify(value.domain));
    }
});
```

## ethernet.getIfaceConfig

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.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | The device information does not exist.  |

**Example**

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

## ethernet.isIfaceActive

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.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | The 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

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.                      |
| 401     | Parameter error.                        |
| 2200001 | Invalid parameter value.                |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |
| 2201005 | The device information does not exist.  |

**Example**

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

## ethernet.getAllActiveIfaces

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.                      |
| 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

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.                      |
| 2200002 | Operation failed. Cannot connect to service.|
| 2200003 | System internal error.                  |

**Example**

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

## InterfaceConfiguration

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 (,).|

## IPSetMode

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.|