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// Copyright (c) 2011 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 "chrome/browser/chromeos/web_socket_proxy_helper.h"
#include "base/string_number_conversions.h"
#include "base/logging.h"
namespace chromeos {
// static
bool WebSocketProxyHelper::FetchPassportAddrNamePort(
uint8* begin, uint8* end,
std::string* passport, std::string* addr,
std::string* hostname, int* port) {
std::string input(begin, end);
// At first, get rid of a colon at the end.
if (input.empty() || input[input.length() - 1] != ':')
return false;
input.erase(input.length() - 1);
// Fetch the passport from the start.
if (!FetchToken(true, false, &input, passport) || passport->empty())
return false;
// Fetch the IP address from the start. Match '['-brackets if presented.
if (!FetchToken(true, true, &input, addr))
return false;
// Fetch the port number from the end.
std::string port_str;
if (!FetchToken(false, false, &input, &port_str) || port_str.empty() ||
!base::StringToInt(port_str, port) ||
*port <= 0 || *port >= (1<<16))
return false;
// The hostname is everything remained.
if (input.length() < 2 || input[input.length() - 1] != ':')
return false;
hostname->assign(input, 0, input.length() - 1);
return true;
}
// static
bool WebSocketProxyHelper::FetchToken(bool forward,
bool match_brackets,
std::string* input,
std::string* token ) {
if (input->empty()) {
token->clear();
} else {
std::string separator =
(forward && match_brackets && input->at(0) == '[') ? "]:" : ":";
size_t pos = forward ? input->find(separator) : input->rfind(separator);
if (pos != std::string::npos) {
size_t start = forward ? 0 : pos + 1;
size_t end = forward ? pos : input->length();
token->assign(*input, start, end - start + separator.length() - 1);
input->erase(start, end - start + separator.length());
} else {
return false;
}
}
return true;
}
} // namespace chromeos
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