diff options
Diffstat (limited to 'src/se/leap/openvpn/CIDRIP.java')
-rw-r--r-- | src/se/leap/openvpn/CIDRIP.java | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/se/leap/openvpn/CIDRIP.java b/src/se/leap/openvpn/CIDRIP.java new file mode 100644 index 00000000..8c4b6709 --- /dev/null +++ b/src/se/leap/openvpn/CIDRIP.java @@ -0,0 +1,58 @@ +package se.leap.openvpn; + +class CIDRIP{ + String mIp; + int len; + public CIDRIP(String ip, String mask){ + mIp=ip; + long netmask=getInt(mask); + + // Add 33. bit to ensure the loop terminates + netmask += 1l << 32; + + int lenZeros = 0; + while((netmask & 0x1) == 0) { + lenZeros++; + netmask = netmask >> 1; + } + // Check if rest of netmask is only 1s + if(netmask != (0x1ffffffffl >> lenZeros)) { + // Asume no CIDR, set /32 + len=32; + } else { + len =32 -lenZeros; + } + + } + @Override + public String toString() { + return String.format("%s/%d",mIp,len); + } + + public boolean normalise(){ + long ip=getInt(mIp); + + long newip = ip & (0xffffffffl << (32 -len)); + if (newip != ip){ + mIp = String.format("%d.%d.%d.%d", (newip & 0xff000000) >> 24,(newip & 0xff0000) >> 16, (newip & 0xff00) >> 8 ,newip & 0xff); + return true; + } else { + return false; + } + } + static long getInt(String ipaddr) { + String[] ipt = ipaddr.split("\\."); + long ip=0; + + ip += Long.parseLong(ipt[0])<< 24; + ip += Integer.parseInt(ipt[1])<< 16; + ip += Integer.parseInt(ipt[2])<< 8; + ip += Integer.parseInt(ipt[3]); + + return ip; + } + public long getInt() { + return getInt(mIp); + } + +}
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