Because every hardware type is unique, it is hard to give more specific advice than already discussed. The driver is expected to correctly deliver both the packet data and the protocol number to the receiving host. For example, plip and the PPP driver have it set. This section discusses the design concepts that led to the snull network interface. Real interfaces don’t depend on the protocol being transmitted, and this limitation of snull doesn’t affect the fragments of code that are shown in this chapter. Used for end of life products. Most drivers that deal with real hardware have to be prepared for that hardware to fail to respond occasionally.
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Drivers for modern hardware normally do not need to implement this method. The interface interrupts the processor to signal one of two possible events: Many functions operate on socket buffers; here are the most interesting ones:.
Unfortunately, this effect can’t be accomplished through IP-number assignment alone, because the kernel wouldn’t send out a packet through interface A that was directed to its own interface B. The kernel provides a function to start the queue:.
Downloads for Intel® IT Gigabit Ethernet Controller
Please work with your appropriate Intel representative to obtain a formal price quotation. The code modifies the source, destination, and checksum lknux the IP header of each 82574t without checking whether it actually conveys IP information.
Prior to version 2. We’ll start with transmission because it is slightly easier to understand. The single argument received by init is a pointer to the device being initialized; its return value is either 0 or a negative error code, usually -ENODEV.
Intel® IT Gigabit Ethernet Controller Product Specifications
If you look at the source for almost any network driver in the kernel, you will find some boilerplate that looks like this:. Listing of these RCP does not constitute a formal pricing offer from Intel. These interfaces can be instructed to receive every multicast packet and let the software determine if this host is a valid recipient. Please refer to the Launch Date for market availability.
The ifr pointer points to a kernel-space address that holds a copy of the structure passed 82574i the user. This method is the entry point for configuring the driver. A driver not interested in implementing this method can leave the field set to NULL.
When ifconfig is used to assign an address to the interface, it performs two tasks. Lithography refers to the semiconductor technology used to manufacture an integrated circuit, and is reported in nanometer nmindicative of the size of features built on the semiconductor. See “Multicasting” for further details and a sample implementation. That method’s job is to do whatever is needed to clear up the problem and to ensure the proper completion of any transmissions that were already in progress.
Your comments have been sent. Some of the fields are used by ifconfig and netstat to provide the user with information about the current configuration. Prices may vary for other package types and shipment quantities.
Intel® 82574IT Gigabit Ethernet Controller
The interface driver doesn’t need to know about them. It is not used ,inux of the device driver itself, but for informational purposes in ifconfig.
This method returns a pointer to the statistics for the device. If the driver needs to do anything particular when the MTU is changed, it should declare its own function; otherwise, the default will do the right thing.
Interestingly, this code has been around since the 1. The function must be called when the interface is closed in the stop method but can also be used to 8257i4t stop transmission, as explained in the next section.
They are thus often affected by outside events, and they can be transient things. The function simply takes the information provided by the kernel and formats it into a standard Ethernet header.
Although no official driver currently uses this flag, it can be set and reset by user programs via ioctland your driver can use it. Note that on 2. After all, the driver knows about the details of the physical layer header, while the authors of the networking code have tried to insulate the rest of the kernel from that knowledge.