Method for processing socket, method and apparatus for transmitting packet data

An apparatus for processing a SOCKET, comprising a connection management application module and a TCP/IP (Transmission Control Protocol/Internet Protocol) protocol stack module, wherein,

• the connection management application module is configured to obtain a SOCKET identifier corresponding to each service application, and transmit the SOCKET identifier and a modification instruction to the TCP/IP protocol stack module;
• the TCP/IP protocol stack module is configured to search for SOCKET file description information corresponding to the SOCKET identifier, and modify the SOCKET file description information according to the modification instruction.

An apparatus for transmitting packet data, comprising a connection management application module and a TCP/IP (Transmission Control Protocol/Internet Protocol) protocol stack module, wherein,

• the connection management application module is configured to obtain a SOCKET created by each service application, search for an IP address of a specified network link which corresponds to the service application, and transmit the SOCKET identifier, the IP address and a link modification instruction to the TCP/IP protocol stack;
• the TCP/IP protocol stack module is configured to search for SOCKET file description information corresponding to the SOCKET identifier, and modify a source IP address in the SOCKET file description information to the IP address of the specified network link according to the link modification instruction;
• and transmit the packet data of the service application through the specified network link.