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Seed the random IP address generator

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This commit is contained in:
Juan Font Alonso 2021-02-21 22:11:27 +01:00
parent 272eee79fd
commit 5d3c80a192
1 changed files with 6 additions and 5 deletions
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11
utils.go
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@ -13,6 +13,7 @@ import (
"fmt" "fmt"
"io" "io"
"net" "net"
"time"
mathrand "math/rand" mathrand "math/rand"
@ -95,17 +96,17 @@ func (h *Headscale) getAvailableIP() (*net.IP, error) {
} }
func getRandomIP() (*net.IP, error) { func getRandomIP() (*net.IP, error) {
mathrand.Seed(time.Now().Unix())
ipo, ipnet, err := net.ParseCIDR("100.64.0.0/10") ipo, ipnet, err := net.ParseCIDR("100.64.0.0/10")
if err == nil { if err == nil {
ip := ipo.To4() ip := ipo.To4()
fmt.Println("In Randomize IPAddr: IP ", ip, " IPNET: ", ipnet) fmt.Println("In Randomize IPAddr: IP ", ip, " IPNET: ", ipnet)
fmt.Println("Final address is ", ip) fmt.Println("Final address is ", ip)
// fmt.Println("Broadcast address is ", ipb) // fmt.Println("Broadcast address is ", ipb)
// fmt.Println("Network address is ", ipn) // fmt.Println("Network address is ", ipn)
r := mathrand.Uint32()
ipRaw := make([]byte, 4) ipRaw := make([]byte, 4)
binary.LittleEndian.PutUint32(ipRaw, mathrand.Uint32()) binary.LittleEndian.PutUint32(ipRaw, r)
// ipRaw[3] = 254 // ipRaw[3] = 254
// fmt.Println("ipRaw is ", ipRaw) // fmt.Println("ipRaw is ", ipRaw)
for i, v := range ipRaw { for i, v := range ipRaw {
@ -115,7 +116,7 @@ func getRandomIP() (*net.IP, error) {
} }
fmt.Println("FINAL IP: ", ip.String()) fmt.Println("FINAL IP: ", ip.String())
return &ip, nil return &ip, nil
} else {
return nil, err
} }
return nil, err
} }