u014211079的专栏

drivers/net/ethernet/realtek/r8169.cinclude/linux/mod_devicetable.hstruct pci_device_id {    __u32 vendor, device;        /* Vendor and device ID or PCI_ANY_ID*/    __u32 subvendor, subdevice;

The purpose of the link layer in the TCP/IP protocol suite is to send and receiveIP datagrams for the IP module, ARP requests and replies for the ARP module, andRARP requests and replies for the

以太网的头部为14字节，6字节源地址，6字节目的地址，2字节类型域。它的定义如下：[ include/uapi/linux/if_ether.h ]/* * This is an Ethernet frame header. * ETH_ALEN = 6 */struct ethhdr { unsigned char h_dest[ETH_ALEN]; /* destinati

这个网卡驱动也是一个PCI驱动，所以先来

devices and the kernel can use two main techniquesfor exchanging data: polling and interrupts

Among the various initialization tasks, we are mainly interested in three:

include/linux/mod_devicetable.hinclude/linux/pci.h

When a Device Is RegisteredThe registration of a network device takes place in the following situations:Loading an NIC’s device driverAn NIC’s device driver is initialized at boot time if it is

Repeaters, Bridges, and RoutersArepeater is a device, typically equipped with two ports, that simply copies whatit receives on one port to the other, and vice versa. It copies data bit by bit; it

we will see how the Spanning Tree Protocol (STP) manages to makeany topology loop free, and therefore allows the network administrator to use topologieswith redundant links. In particular

Bridge Device AbstractionIn Linux, a bridge is a virtual device. As such, it cannot receive or transmit anything unless you bind one or more real devices to it. We will use the term enslave to refer

There is a limit on the size of the frame for both Ethernet encapsulation and 802.3 encapsulation. This limits the number of bytes of data to 1500 and 1492, respectively. This characteristic of the li