Fix captive portal detection on IPv6 networks.
Currently the captive portal check URL is generated by
concatenating scheme, "://", IP address, and port. This breaks
for IPv6 because IPv6 addresses in URLs must be enclosed in
square brackets (e.g., http://2001:db8::1/generate_204 is
invalid; should he http://[2001:db8::1]/generate_204 instead).
The resulting MalformedURLException causes isMobileOk to report
that there is no captive portal, even if there is one.
Fortunately the three-arg URL constructor already knows how to
construct URLs with IPv6 addresses. Use that instead of
generating the URL ourselves.
Bug: 10801896
Change-Id: I02605ef62f493a34f25bb405ef02b111543a76fd
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index 59b559e..5695ee5 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -4247,6 +4247,9 @@
addrTried ++) {
// Choose the address at random but make sure its type is supported
+ // TODO: This doesn't work 100% of the time, because we may end up
+ // trying the same invalid address more than once and ignoring one
+ // of the valid addresses.
InetAddress hostAddr = addresses[rand.nextInt(addresses.length)];
if (((hostAddr instanceof Inet4Address) && linkHasIpv4)
|| ((hostAddr instanceof Inet6Address) && linkHasIpv6)) {
@@ -4271,10 +4274,8 @@
}
// Rewrite the url to have numeric address to use the specific route.
- // I also set the "Connection" to "Close" as by default "Keep-Alive"
- // is used which is useless in this case.
- URL newUrl = new URL(orgUri.getScheme() + "://"
- + hostAddr.getHostAddress() + orgUri.getPath());
+ URL newUrl = new URL(orgUri.getScheme(),
+ hostAddr.getHostAddress(), orgUri.getPath());
log("isMobileOk: newUrl=" + newUrl);
HttpURLConnection urlConn = null;
@@ -4287,6 +4288,8 @@
urlConn.setReadTimeout(SOCKET_TIMEOUT_MS);
urlConn.setUseCaches(false);
urlConn.setAllowUserInteraction(false);
+ // Set the "Connection" to "Close" as by default "Keep-Alive"
+ // is used which is useless in this case.
urlConn.setRequestProperty("Connection", "close");
int responseCode = urlConn.getResponseCode();