Data transmission method and apparatus

A data transmission method, applied to a first device, wherein a protocol stack of a second communication protocol is deployed on the first device, and the method comprises:

• transferring, by the first device, a first data packet from a first protocol layer of the protocol stack to a second protocol layer of the protocol stack, wherein the first data packet comprises data and first information, the first information comprises a source network address, a destination network address, a source transport layer port number, and a destination transport layer port number, and the first information corresponds to a first communication protocol;
• determining, by the first device, second information at the second protocol layer of the protocol stack based on a first mapping relationship, wherein the second information corresponds to the second communication protocol, the second information comprises a communication protocol source address, a communication protocol destination address, a communication protocol source port number, and a communication protocol destination port number, and the first mapping relationship indicates a mapping relationship between the source network address and the communication protocol source address, a mapping relationship between the destination network address and the communication protocol destination address, a mapping relationship between the source transport layer port number and the communication protocol source port number, and a mapping relationship between the destination transport layer port number and the communication protocol destination port number;
• generating, by the first device, a second data packet at the second protocol layer of the protocol stack, wherein the second data packet comprises the data, the communication protocol source address, the communication protocol destination address, the communication protocol source port number, and the communication protocol destination port number;
• and
• sending, by the first device, the second data packet at a third protocol layer of the protocol stack.

A data transmission apparatus, comprising:

• at least one processor;
• and
• a non-transitory computer readable medium storing a program to be executed by the at least one processor, wherein the program comprises instructions that when executed by the at least one processor, cause the data transmission apparatus to perform operations comprising:
• obtaining a first data packet, wherein the first data packet comprises data and first information, the first information comprises a source network address, a destination network address, a source transport layer port number, and a destination transport layer port number, and the first information corresponds to a first communication protocol;
• determining second information based on a first mapping relationship, wherein the second information corresponds to a second communication protocol, the second information comprises a communication protocol source address, a communication protocol destination address, a communication protocol source port number, and a communication protocol destination port number, and the first mapping relationship indicates a mapping relationship between the source network address and the communication protocol source address, a mapping relationship between the destination network address and the communication protocol destination address, a mapping relationship between the source transport layer port number and the communication protocol source port number, and a mapping relationship between the destination transport layer port number and the communication protocol destination port number;
• generating a second data packet, wherein the second data packet comprises the data, the communication protocol source address, the communication protocol destination address, the communication protocol source port number, and the communication protocol destination port number;
• and
• sending the second data packet.