Add a command line flag to force all network traffic through a particular server.

The command line is:
  --fixed-server=host:port

When set, all traffic will be diverted through this server.  This is useful for
testing purposes with fixed servers.

BUG=none
TEST=none


Review URL: http://codereview.chromium.org/345034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30798 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 52 insertions, 0 deletions

diff --git a/net/base/fixed_host_resolver.cc b/net/base/fixed_host_resolver.cc
new file mode 100644
index 0000000..54e48a9
--- /dev/null
+++ b/net/base/fixed_host_resolver.cc
@@ -0,0 +1,52 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/base/fixed_host_resolver.h"
+
+#include "net/base/net_errors.h"
+#include "net/base/net_util.h"
+#include "net/base/host_resolver_impl.h"
+
+namespace net {
+
+FixedHostResolver::FixedHostResolver(const std::string& host_and_port)
+    : initialized_(false) {
+  std::string host;
+  int port = 0;
+  if (!ParseHostAndPort(host_and_port, &host, &port)) {
+    LOG(ERROR) << "Invalid FixedHostResolver information: " << host_and_port;
+    return;
+  }
+
+  int rv = SystemHostResolverProc(host, net::ADDRESS_FAMILY_UNSPECIFIED,
+                                  &address_);
+  if (rv != OK) {
+    LOG(ERROR) << "Could not resolve fixed host: " << host;
+    return;
+  }
+
+  if (port <= 0) {
+    LOG(ERROR) << "FixedHostResolver must contain a port number";
+    return;
+  }
+
+  address_.SetPort(port);
+  initialized_ = true;
+}
+
+int FixedHostResolver::Resolve(const RequestInfo& info,
+                               AddressList* addresses,
+                               CompletionCallback* callback,
+                               RequestHandle* out_req,
+                               LoadLog* load_log) {
+  if (!initialized_)
+    return ERR_NAME_NOT_RESOLVED;
+
+  DCHECK(addresses);
+  *addresses = address_;
+  return OK;
+}
+
+}  // namespace net
+