1 files changed, 66 insertions, 0 deletions
diff --git a/netlink.go b/netlink.go
new file mode 100644
index 0000000..7d3c3f5
--- /dev/null
+++ b/netlink.go
@@ -0,0 +1,66 @@
+package main
+
+// examples of what ifconfig does
+// example of AF_NETLINK change:
+// https://stackoverflow.com/questions/579783/how-to-detect-ip-address-change-programmatically-in-linux/2353441#2353441
+// from that page, a link to watch for any ip event:
+// https://github.com/angt/ipevent/blob/master/ipevent.c
+
+// https://github.com/mdlayher/talks : Linux, Netlink, and Go in 7 minutes or less! (GopherCon 2018, lightning talk) 
+
+/*
+	c example from ipevent.c :
+	int fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+
+	struct sockaddr_nl snl = {
+	    .nl_family = AF_NETLINK,
+	    .nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR,
+	};
+*/
+
+/*
+import 	(
+//	"os"
+//	"os/exec"
+	// "log"
+	// "net"
+	// "unix"
+	"github.com/vishvananda/netlink"
+	"github.com/jsimonetti/rtnetlink"
+//	"git.wit.org/wit/gui"
+//	"github.com/davecgh/go-spew/spew"
+)
+
+// In golang, write a function     to register with netlink to detect changes to any network interface     Use tab indentation. Do not include example usage.
+
+func registerNetlink() error {
+	// Create netlink socket
+	sock, err := netlink.Socket(rtnetlink.NETLINK_ROUTE, 0)
+	if err != nil {
+		return err
+	}
+	// Register for interface change events
+	err = netlink.AddMembership(sock, netlink.RTNLGRP_LINK)
+	if err != nil {
+		return err
+	}
+	// Close the socket 
+	defer sock.Close()
+	// Handle incoming notifications
+	for {
+		msgs, _, err := sock.Receive()
+		if err != nil {
+			return err
+		}
+		for _, msg := range msgs {
+			switch msg.Header.Type {
+			case unix.RTM_NEWLINK:
+				// Do something with new link
+			case unix.RTM_DELLINK:
+				// Do something with deleted link
+			}
+		}
+	}
+	return nil
+}
+*/