public void addRoute(String dest, String mask, String gateway, String device) {
CIDRIP route = new CIDRIP(dest, mask);
boolean include = isAndroidTunDevice(device);
NetworkSpace.ipAddress gatewayIP = new NetworkSpace.ipAddress(new CIDRIP(gateway, 32), false);
if (mLocalIP == null) {
VpnStatus.logError(
"Local IP address unset but adding route?! This is broken! Please contact author with log");
return;
}
NetworkSpace.ipAddress localNet = new NetworkSpace.ipAddress(mLocalIP, true);
if (localNet.containsNet(gatewayIP)) include = true;
if (gateway != null && (gateway.equals("255.255.255.255") || gateway.equals(mRemoteGW)))
include = true;
if (route.len == 32 && !mask.equals("255.255.255.255")) {
VpnStatus.logWarning(R.string.route_not_cidr, dest, mask);
}
if (route.normalise())
VpnStatus.logWarning(R.string.route_not_netip, dest, route.len, route.mIp);
mRoutes.addIP(route, include);
}
private String getTunConfigString() {
// The format of the string is not important, only that
// two identical configurations produce the same result
String cfg = "TUNCFG UNQIUE STRING ips:";
if (mLocalIP != null) cfg += mLocalIP.toString();
if (mLocalIPv6 != null) cfg += mLocalIPv6;
cfg +=
"routes: "
+ TextUtils.join("|", mRoutes.getNetworks(true))
+ TextUtils.join("|", mRoutesv6.getNetworks(true));
cfg +=
"excl. routes:"
+ TextUtils.join("|", mRoutes.getNetworks(false))
+ TextUtils.join("|", mRoutesv6.getNetworks(false));
cfg += "dns: " + TextUtils.join("|", mDnslist);
cfg += "domain: " + mDomain;
cfg += "mtu: " + mMtu;
return cfg;
}
public void setLocalIP(String local, String netmask, int mtu, String mode) {
mLocalIP = new CIDRIP(local, netmask);
mMtu = mtu;
mRemoteGW = null;
long netMaskAsInt = CIDRIP.getInt(netmask);
if (mLocalIP.len == 32 && !netmask.equals("255.255.255.255")) {
// get the netmask as IP
int masklen;
long mask;
if ("net30".equals(mode)) {
masklen = 30;
mask = 0xfffffffc;
} else {
masklen = 31;
mask = 0xfffffffe;
}
// Netmask is Ip address +/-1, assume net30/p2p with small net
if ((netMaskAsInt & mask) == (mLocalIP.getInt() & mask)) {
mLocalIP.len = masklen;
} else {
mLocalIP.len = 32;
if (!"p2p".equals(mode)) VpnStatus.logWarning(R.string.ip_not_cidr, local, netmask, mode);
}
}
if (("p2p".equals(mode) && mLocalIP.len < 32) || ("net30".equals(mode) && mLocalIP.len < 30)) {
VpnStatus.logWarning(R.string.ip_looks_like_subnet, local, netmask, mode);
}
/* Workaround for Lollipop, it does not route traffic to the VPNs own network mask */
if (mLocalIP.len <= 31 && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
CIDRIP interfaceRoute = new CIDRIP(mLocalIP.mIp, mLocalIP.len);
interfaceRoute.normalise();
addRoute(interfaceRoute);
}
// Configurations are sometimes really broken...
mRemoteGW = netmask;
}