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nsINetworkLinkService 编辑

netwerk/base/public/nsINetworkLinkService.idlScriptable Network link status monitoring service. 1.0 66 Introduced Gecko 1.8 Inherits from: nsISupports Last changed in Gecko 8.0 (Firefox 8.0 / Thunderbird 8.0 / SeaMonkey 2.5)

Implemented by: @mozilla.org/network/network-link-service;1 as a service:

var networkLinkService = Components.classes["@mozilla.org/network/network-link-service;1"]
                         .getService(Components.interfaces.nsINetworkLinkService);

Attributes

Attribute	Type	Description
`isLinkUp`	boolean	This is set to `true` when the system is believed to have a usable network connection. The link is only up when network connections can be established. For example, the link is down during DHCP configuration (unless there is another usable interface already configured). If the link status is not currently known, we generally assume that it is up. Read only.
`linkStatusKnown`	boolean	This is set to `true` when we believe that `isLinkUp` is accurate. Read only.
`linkType`	unsigned long	The type of network connection, one of the `LINK_TYPE_` constants. Read only.* Note: As of Gecko 8.0, all Operating Systems currently return `LINK_TYPE_UNKNOWN`. Android support was backed out due to perceived security concerns, see bug 691054. As of Gecko 28.0 Android support is available again, see bug 939680.

Constants

Constant	Value	Description
`LINK_TYPE_UNKNOWN`	`0`	We were unable to determine the network connection type.
`LINK_TYPE_ETHERNET`	`1`	A standard wired Ethernet connection.
`LINK_TYPE_USB`	`2`	A connection via a USB port.
`LINK_TYPE_WIFI`	`3`	A connection via a WiFi access point (IEEE802.11).
`LINK_TYPE_WIMAX`	`4`	A connection via WiMax (IEEE802.16).
`LINK_TYPE_2G`	`5`	A '2G' mobile connection (for example, GSM, GPRS, EDGE).
`LINK_TYPE_3G`	`6`	A '3G' mobile connection (for example, UMTS, CDMA).
`LINK_TYPE_4G`	`7`	A '4G' mobile connection (for example, LTE, UMB).