FILE TRANSFER METHOD AND APPARATUS

摘要

A file transfer method includes: sending, by a sending device, a ready request message to a multicast group in a multicast manner; when receiving a first ready message returned by a first device in the multicast group, sending, by the sending device, a master receiving device determining message to the first device, where the master receiving device determining message is used to notify the first device that the first device has been selected as a master receiving device, and sending a data packet of a to-be-sent file to the multicast group in a multicast manner; and when a second device newly joins the multicast group, sending a first message to the second device to notify it in time of information about a file that is currently being transferred, so that the newly joined device can start receiving immediately.

主权项

1. A file transfer method, wherein the method comprises:
sending, by a sending device, a ready request message to a multicast group in a multicast manner, wherein the ready request message carries at least a file name and block quantity of a to-be-sent file, and the multicast group comprises at least one device; when receiving a first ready message returned by a first device in the multicast group, sending, by the sending device, a first master receiving device determining message to the first device, wherein the first master receiving device determining message is used to notify the first device that the first device has been selected as a master receiving device, and sending a data packet of the to-be-sent file to the multicast group in a multicast manner; and sending a first message to a second device when the second device newly joins the multicast group, wherein the first message carries at least the file name and block quantity of the to-be-sent file and a first data packet identifier, the first data packet identifier is used to indicate a data packet to be transferred by the sending device, and the first message is used to notify the second device of information about the data packet to be transferred by the sending device, so that the second device receives, according to the first message, the data packet that is of the to-be-sent file and is to be transferred by the sending device.