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byte calculation

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This commit is contained in:
Mateusz Piątkowski 2022-12-17 17:50:34 +01:00
parent d4ef97c0c2
commit f9bf8fa6b1
1 changed files with 11 additions and 5 deletions
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16
server/scan/scanner.go
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@ -18,11 +18,17 @@ const timeoutTCPHosts = time.Duration(1) * time.Second
func nextIP(ip net.IP) (next net.IP) {
// FIXME Proper next IP address in network calculation
next = make([]byte, 4)
bytes := []byte(ip)
bytes = bytes[len(bytes)-4:]
next[0], next[1], next[2], next[3] = bytes[0], bytes[1], bytes[2], bytes[3]+1
return
ip = ip.To4()
o := (uint(ip[0]) << 24) + (uint(ip[1]) << 16) + (uint(ip[2]) << 8) + uint(ip[3])
o++
o3 := byte(o & 0xFF)
o2 := byte((o >> 8) & 0xFF)
o1 := byte((o >> 16) & 0xFF)
o0 := byte((o >> 24) & 0xFF)
return net.IPv4(o0, o1, o2, o3)
}
// AvailableNetworks returns all IPv4 networks that are available to the host