Add pretty printing on about:net-internals for the parameters of SSL_VERSION_FALLBACK.

BUG=126340

Review URL: https://chromiumcodereview.appspot.com/10473013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@141096 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 52 insertions, 0 deletions

diff --git a/chrome/browser/resources/net_internals/log_view_painter.js b/chrome/browser/resources/net_internals/log_view_painter.js
index 63b3c14..05f429c 100644
--- a/chrome/browser/resources/net_internals/log_view_painter.js
+++ b/chrome/browser/resources/net_internals/log_view_painter.js
@@ -252,6 +252,9 @@ function getParamaterWriterForEventType(eventType) {
     case LogEventType.CERT_VERIFIER_JOB:
     case LogEventType.SSL_CERTIFICATES_RECEIVED:
       return writeParamsForCertificates;
+
+    case LogEventType.SSL_VERSION_FALLBACK:
+      return writeParamsForSSLVersionFallback;
   }
   return null;
 }
@@ -319,6 +322,34 @@ function getLoadFlagSymbolicString(loadFlag) {
 }
 
 /**
+ * Converts an SSL version number to a textual representation.
+ * For instance, SSLVersionNumberToName(0x0301) returns 'TLS 1.0'.
+ */
+function SSLVersionNumberToName(version) {
+  if ((version & 0xFFFF) != version) {
+    // If the version number is more than 2 bytes long something is wrong.
+    // Print it as hex.
+    return 'SSL 0x' + version.toString(16);
+  }
+
+  // See if it is a known TLS name.
+  var kTLSNames = {
+    0x0301: 'TLS 1.0',
+    0x0302: 'TLS 1.1',
+    0x0303: 'TLS 1.2'
+  };
+  var name = kTLSNames[version];
+  if (name)
+    return name;
+
+  // Otherwise label it as an SSL version.
+  var major = (version & 0xFF00) >> 8;
+  var minor = version & 0x00FF;
+
+  return 'SSL ' + major + '.' + minor;
+}
+
+/**
  * TODO(eroman): get rid of this, as it is only used by 1 callsite.
  *
  * Indent |lines| by |start|.
@@ -445,6 +476,27 @@ function writeParamsForCertificates(entry, out, consumedParams) {
   consumedParams.certificates = true;
 }
 
+/**
+ * Outputs the SSL version fallback parameters of |entry| to |out|.
+ */
+function writeParamsForSSLVersionFallback(entry, out, consumedParams) {
+  var params = entry.params;
+
+  if (typeof params.version_before != 'number' ||
+      typeof params.version_after != 'number') {
+    // Unrecognized params.
+    return;
+  }
+
+  var line = SSLVersionNumberToName(params.version_before) +
+             ' ==> ' +
+             SSLVersionNumberToName(params.version_after);
+  out.writeArrowIndentedLines([line]);
+
+  consumedParams.version_before = true;
+  consumedParams.version_after = true;
+}
+
 function writeParamsForProxyConfigChanged(entry, out, consumedParams) {
   var params = entry.params;