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package scream
import (
"fmt"
"net"
"syscall"
"unsafe"
)
// PortType struct is a part of settings for ipscanner and port mapper
type PortType struct /*Porttype is a part of settings for ipscanner*/ {
Nm int
Tp string
}
var (
// StopChan stop all procces
StopChan = make(chan struct{}, 8)
// PauseChan pause all goroutins
PauseChan = make(chan struct{}, 16)
// ContChan makes all goroutins continue
ContChan = make(chan struct{}, 16)
)
// PoutComming struct to return scanning resualts
type PoutComming struct {
Stat, Ptype string
Number int
}
//GetHosts get a cidr network range and return slice of ip addesses
func GetHosts(cidr string) ([]string, error) {
ip, ipnet, err := net.ParseCIDR(cidr)
if err != nil {
return nil, err
}
var ips []string
for ip := ip.Mask(ipnet.Mask); ipnet.Contains(ip); inc(ip) {
ips = append(ips, ip.String())
}
// remove network address and broadcast address
lenIPs := len(ips)
switch {
case lenIPs < 2:
return ips, nil
default:
return ips[1 : len(ips)-1], nil
}
}
func inc(ip net.IP) {
for j := len(ip) - 1; j >= 0; j-- {
ip[j]++
if ip[j] > 0 {
break
}
}
}
var sysendARP = syscall.MustLoadDLL("iphlpapi.dll").MustFindProc("SendARP")
func ip4ToUint32(ip net.IP) (uint32, error) {
if ip == nil {
return 0, fmt.Errorf("ip address %v is not ip4", ip)
}
var ret uint32
for i := 4; i > 0; i-- {
ret <<= 8
ret += uint32(ip[i-1])
}
return ret, nil
}
// SendARP used to bcast arp in network
func SendARP(ip net.IP) (net.HardwareAddr, error) {
dst, err := ip4ToUint32(ip)
if err != nil {
return nil, err
}
mac := []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
n := uint32(len(mac))
ret, _, _ := sysendARP.Call(
uintptr(dst),
0,
uintptr(unsafe.Pointer(&mac[0])),
uintptr(unsafe.Pointer(&n)))
if ret != 0 {
return nil, syscall.Errno(ret)
}
return mac, nil
}
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