I am reading driver code from Intel E1000E AND Realtek r1869 driver. I hvae the devices for both, Currently I am studying ethtool_ops. I know Ethtool can be a tool for Long story short, ethtool is a means to display and adjust generic NIC/driver parameters (identification, the number of receive and transmit q…
Tag: ethernet
Display ethernet interface and its corresponding IP address from Linux “ip a s”
I am trying to list all the ethernet device names and its assigned IP address available in the RHEL node using the output of ip addr show command I print all the network interfaces names only with the following: I am trying to get the output in the below format by applying more logic and coding in the above a…
Capturing PTP packets with Linux raw socket
I want to implement a C program that captures all the Precision-Time-Protocol (PTP) frames on the Ethernet, so I created a raw socket and attached a filter for PTP, I use recvmsg() to read data from the socket. The first issue is that I wasn’t receiving any PTP frames so I commented out the filter but n…
Why are 14 bytes of random data appended to a raw ethernet frame?
I’m sending a raw Ethernet frame to the loopback interface (Linux ubuntu 4.15.0-34-generic) with the following python code: (We use a custom Ethernet type 0x6666, but using the packet length (50) as specified by the Ethernet II frame format has the same outcome) I would expect to see a packet of length …
Ethernet frames from NIC
I’m searching for help and an opinion-advice for a network project, in which I’m working lately. This requires a Linux machine to be a passive network appliance. Network packets come in from one network interface and come out from another interface ( net–eth0–>Linux PC–eth1…