Eth Ethernet receiving function code analysis

Eth Ethernet receiving function code analysis

Ethernet (Ethernet) is a commonly used network communication protocol, widely used in data transmission between various computers and devices. In AutoSAR (AUTomotive Open System ARchitecture), the Ethernet receiving function plays an important role for receiving data sent through Ethernet. This article will analyze the source code of the Eth Ethernet receiving function to help readers better understand its implementation principle.

void Eth_ReceiveFunction(void)
{
    Eth_FrameType frameType;
    uint8 *dataPtr;
    uint16 dataLength;

    Eth_Receive(&frameType, &dataPtr, &dataLength);

    // 数据处理逻辑
    if (frameType == ETH_FRAME_TYPE_IP)
    {
        // 对IP数据包进行处理
        ProcessIPPacket(dataPtr, dataLength);
    }
    else if (frameType == ETH_FRAME_TYPE_ARP)
    {
        // 对ARP数据包进行处理
        ProcessARPPacket(dataPtr, dataLength);
    }
    else
    {
        // 其他类型的数据包处理
        HandleOtherPackets(dataPtr, dataLength);
    }

    Eth_ReceiveComplete();
}

The above is a code example of a simple Eth Ethernet receive function. Next, we will analyze the function and implementation details of this function line by line.

1. First, a few variables are declared at the beginning of the function:frame