Communication method and related device

A communication method, comprising:

• sending, by a cone device, hole punching packets to M public ports of a symmetric device, wherein M is a natural number greater than 1;
• and
• establishing, by the cone device, a communication connection to the symmetric device based on a response packet, wherein the response packet is a packet sent by the symmetric device based on the hole punching packet, the response packet carries a first network information mapping relationship, and the cone device is configured to establish a direct communication connection to the symmetric device based on the first network information mapping relationship;
• and
• before sending by the cone device the hole punching packets to the M public ports of the symmetric device, the method further comprises:
• sending, by the cone device, a second connection establishment request packet to a signaling server, wherein the second connection establishment request packet carries second network information, the signaling server obtains, by searching based on the second connection establishment request packet, a second network information mapping relationship locally stored in the signaling server, and the signaling server sends the second network information mapping relationship to the cone device based on the second network information;
• and
• receiving, by the cone device, the second network information mapping relationship.

A computer device, comprising:

• an input/output (I/O) interface, a processor, and a memory, wherein the memory stores program instructions;
• and when the instructions are executed by the computer device, the computer device performs the following operations:
• listening on N local public ports, wherein N is a natural number greater than 1;
• and, when the computer device receives a hole punching packet from the N local public ports,
• sending a response packet to a cone device based on the hole punching packet, so that the computer device establishes a communication connection to the cone device, wherein the hole punching packet is sent by the cone device, the response packet carries a first network information mapping relationship, and the cone device is configured to establish a direct communication connection to the symmetric device based on the first network information mapping relationship;
• and
• wherein before listening on the N local public ports, the method further comprises:
• sending a first connection establishment request packet to a signaling server, wherein the first connection establishment request packet carries first network information, the signaling server obtains, by searching based on a second connection establishment request packet, a second network information mapping relationship locally stored in the signaling server, and the signaling server sends the second network information mapping relationship to the cone device based on the first network information.