System and method of network emlation for test of on-line server processing heavy traffic

A computer program product comprising a non-transitory computer-readable medium, wherein the non-transitory computer-readable medium comprises computer-readable code that, when executed by a computer, causes the computer to perform:

• intercepting, by a kernel-mode NDIS hook driver, packets transferred from a user-mode application program;
• receiving, by a user-mode emulation module, the packets from the NDIS hook driver;
• emulating, by the emulation module, a first packet in the packets in a user-mode virtual network;
• and
• returning, by the emulation module, the first packet to the NDIS hook driver after the emulating the first packet,
• wherein the emulation module comprises a flow classifier, a plurality of real queues each corresponding to a respective flow, a virtual queue, the virtual network comprising a plurality of virtual nodes, and a packet dispatcher,
• wherein the emulating comprises:
• classifying, by the flow classifier, the first packet based on its flow;
• storing the first packet in at least one of the real queues based on its flow;
• generating a virtual packet corresponding to the first packet, and storing the virtual packet in the virtual queue;
• and
• transferring the virtual packet among the virtual nodes in the virtual network, and
• wherein the returning comprises transferring, by the packet dispatcher, the first packet to the NDIS hook driver when the virtual packet corresponding to the first packet arrives at a destination node in the virtual network.