Uplink data packet forwarding method and apparatus, and downlink data packet forwarding method and apparatus

An uplink data packet forwarding apparatus, wherein a kernel network interface is configured to forward a data packet between a local area network and a wide area network, the kernel network interface being provided with an interface attribute, the interface attribute comprising an interface name and an interface type, the interface type comprising a local area network interface and a wide area network interface;

• the kernel network interface having an interface type of a local area network interface is further provided with an interface tag, the interface tag comprising an interface name and an interface serial number;
• and the uplink data packet forwarding apparatus comprises:
• a first judging unit, connected to the kernel network interface having the interface type of the local area network interface, and configured to judge, according to the interface serial number of the kernel network interface receiving a to-be-forwarded data packet, whether the kernel network interface receiving the to-be-forwarded data packet is in a binding state;
• a tag adding unit, connected to the first judging unit, and configured to add the interface tag of the kernel network interface to the to-be-forwarded data packet if the kernel network interface receiving the to-be-forwarded data packet is in a binding state;
• and
• a data packet forwarding unit, connected to the tag adding unit, and configured to forward the to-be-forwarded data packet with the interface tag to the kernel network interface having an interface type of a wide area network interface.

A downlink data packet forwarding method, wherein a kernel network interface is provided with an interface attribute, the interface attribute comprising an interface name and an interface type, the interface type comprising a local area network interface and a wide area network interface;

• when the interface type is a local area network interface, the kernel network interface is further provided with an interface tag, the interface tag comprising an interface name and an interface serial number;
• and the downlink data packet forwarding method comprises:
• receiving, by the kernel network interface having an interface type of a wide area network interface, a to-be-forwarded data packet, the to-be-forwarded data packet comprising an interface tag;
• determining, according to the interface tag of the to-be-forwarded data packet, an original interface name and an original interface serial number of the to-be-forwarded data packet;
• judging whether the original interface serial number of the to-be-forwarded data packet is the same as a target interface serial number;
• and
• if the original interface serial number of the to-be-forwarded data packet is the same as a target interface serial number, removing the interface tag from the to-be-forwarded data, and forwarding the to-be-forwarded data with the interface tag removed to the kernel network interface corresponding to the target interface serial number.

A downlink data packet forwarding apparatus, wherein a kernel network interface is configured to forward a data packet between a local area network and a wide area network, the kernel network interface being provided with an interface attribute, the interface attribute comprising an interface name and an interface type, the interface type comprising a local area network interface and a wide area network interface;

• the kernel network interface having an interface type of a local area network interface is further provided with an interface tag, the interface tag comprising an interface name and an interface serial number;
• and the downlink data packet forwarding apparatus comprises:
• a serial number acquiring unit, connected to the kernel network interface having an interface type of a wide area network interface, and configured to receive a to-be-forwarded data packet, and determine, according to an interface tag of the to-be-forwarded data packet, an original interface name and an original interface serial number of the to-be-forwarded data packet;
• a second judging unit, connected to the serial number acquiring unit, and configured to judge whether the original interface serial number of the to-be-forwarded data packet is the same as a target interface serial number;
• a tag removing unit, connected to the second judging unit, and configured to remove the interface tag from the to-be-forwarded data packet if the original interface serial number of the to-be-forwarded data packet is the same as the target interface serial number;
• and
• a data packet forwarding unit, connected to the tag removing unit, and configured to forward the to-be-forwarded data packet with the interface tag removed to the kernel network interface corresponding to the target interface serial number.