67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
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package main
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// examples of what ifconfig does
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// example of AF_NETLINK change:
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// https://stackoverflow.com/questions/579783/how-to-detect-ip-address-change-programmatically-in-linux/2353441#2353441
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// from that page, a link to watch for any ip event:
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// https://github.com/angt/ipevent/blob/master/ipevent.c
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// https://github.com/mdlayher/talks : Linux, Netlink, and Go in 7 minutes or less! (GopherCon 2018, lightning talk)
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/*
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c example from ipevent.c :
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int fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
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struct sockaddr_nl snl = {
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.nl_family = AF_NETLINK,
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.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR,
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};
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*/
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/*
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import (
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// "os"
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// "os/exec"
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// "log"
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// "net"
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// "unix"
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"github.com/vishvananda/netlink"
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"github.com/jsimonetti/rtnetlink"
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// "git.wit.org/wit/gui"
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// "github.com/davecgh/go-spew/spew"
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)
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// In golang, write a function to register with netlink to detect changes to any network interface Use tab indentation. Do not include example usage.
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func registerNetlink() error {
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// Create netlink socket
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sock, err := netlink.Socket(rtnetlink.NETLINK_ROUTE, 0)
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if err != nil {
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return err
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}
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// Register for interface change events
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err = netlink.AddMembership(sock, netlink.RTNLGRP_LINK)
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if err != nil {
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return err
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}
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// Close the socket
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defer sock.Close()
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// Handle incoming notifications
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for {
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msgs, _, err := sock.Receive()
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if err != nil {
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return err
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}
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for _, msg := range msgs {
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switch msg.Header.Type {
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case unix.RTM_NEWLINK:
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// Do something with new link
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case unix.RTM_DELLINK:
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// Do something with deleted link
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}
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}
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}
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return nil
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}
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*/
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