mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 12:12:15 +02:00
04b2a3c9b7
Signed-off-by: Samuli Seppänen <samuli@openvpn.net>
399 lines
8.2 KiB
C++
399 lines
8.2 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2016 OpenVPN Technologies, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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//
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// Adapted from code Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// Parse an HTTP request
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#ifndef OPENVPN_HTTP_REQUEST_H
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#define OPENVPN_HTTP_REQUEST_H
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#include <openvpn/http/header.hpp>
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#include <openvpn/http/parseutil.hpp>
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namespace openvpn {
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namespace HTTP {
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struct Request {
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Request() : http_version_major(0), http_version_minor(0) {}
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void reset()
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{
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method = "";
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uri = "";
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http_version_major = 0;
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http_version_minor = 0;
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headers.clear();
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}
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std::string to_string() const
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{
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std::ostringstream out;
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out << "HTTP Request" << std::endl;
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out << "method=" << method << std::endl;
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out << "uri=" << uri << std::endl;
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out << "version=" << http_version_major << '/' << http_version_minor << std::endl;
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out << headers.to_string();
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return out.str();
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}
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std::string to_string_compact() const
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{
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std::ostringstream out;
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out << method << ' ' << uri << " HTTP/" << http_version_major << '.' << http_version_minor;
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return out.str();
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}
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bool at_least_http_1_1() const
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{
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return http_version_major > 1 || (http_version_major == 1 && http_version_minor >= 1);
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}
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std::string method;
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std::string uri;
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int http_version_major;
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int http_version_minor;
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HeaderList headers;
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};
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class RequestParser {
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enum state
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{
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method_start,
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method,
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uri,
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http_version_h,
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http_version_t_1,
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http_version_t_2,
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http_version_p,
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http_version_slash,
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http_version_major_start,
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http_version_major,
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http_version_minor_start,
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http_version_minor,
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expecting_newline_1,
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header_line_start,
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header_lws,
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header_name,
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space_before_header_value,
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header_value,
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expecting_newline_2,
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expecting_newline_3
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};
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public:
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enum status {
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pending,
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fail,
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success,
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};
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RequestParser()
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: state_(method_start)
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{
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}
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// Reset to initial parser state.
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void reset()
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{
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state_ = method_start;
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}
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// Parse some HTTP request data.
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status consume(Request& req, const unsigned char input)
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{
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switch (state_)
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{
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case method_start:
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if (!Util::is_char(input) || Util::is_ctl(input) || Util::is_tspecial(input))
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{
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return fail;
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}
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else
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{
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state_ = method;
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req.method.push_back(input);
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return pending;
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}
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case method:
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if (input == ' ')
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{
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state_ = uri;
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return pending;
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}
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else if (!Util::is_char(input) || Util::is_ctl(input) || Util::is_tspecial(input))
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{
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return fail;
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}
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else
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{
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req.method.push_back(input);
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return pending;
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}
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case uri:
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if (input == ' ')
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{
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state_ = http_version_h;
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return pending;
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}
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else if (Util::is_ctl(input))
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{
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return fail;
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}
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else
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{
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req.uri.push_back(input);
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return pending;
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}
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case http_version_h:
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if (input == 'H')
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{
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state_ = http_version_t_1;
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return pending;
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}
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else
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{
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return fail;
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}
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case http_version_t_1:
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if (input == 'T')
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{
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state_ = http_version_t_2;
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return pending;
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}
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else
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{
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return fail;
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}
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case http_version_t_2:
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if (input == 'T')
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{
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state_ = http_version_p;
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return pending;
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}
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else
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{
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return fail;
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}
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case http_version_p:
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if (input == 'P')
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{
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state_ = http_version_slash;
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return pending;
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}
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else
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{
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return fail;
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}
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case http_version_slash:
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if (input == '/')
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{
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req.http_version_major = 0;
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req.http_version_minor = 0;
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state_ = http_version_major_start;
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return pending;
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}
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else
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{
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return fail;
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}
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case http_version_major_start:
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if (Util::is_digit(input))
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{
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req.http_version_major = req.http_version_major * 10 + input - '0';
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state_ = http_version_major;
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return pending;
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}
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else
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{
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return fail;
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}
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case http_version_major:
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if (input == '.')
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{
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state_ = http_version_minor_start;
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return pending;
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}
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else if (Util::is_digit(input))
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{
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req.http_version_major = req.http_version_major * 10 + input - '0';
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return pending;
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}
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else
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{
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return fail;
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}
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case http_version_minor_start:
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if (Util::is_digit(input))
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{
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req.http_version_minor = req.http_version_minor * 10 + input - '0';
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state_ = http_version_minor;
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return pending;
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}
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else
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{
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return fail;
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}
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case http_version_minor:
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if (input == '\r')
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{
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state_ = expecting_newline_1;
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return pending;
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}
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else if (Util::is_digit(input))
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{
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req.http_version_minor = req.http_version_minor * 10 + input - '0';
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return pending;
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}
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else
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{
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return fail;
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}
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case expecting_newline_1:
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if (input == '\n')
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{
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state_ = header_line_start;
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return pending;
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}
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else
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{
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return fail;
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}
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case header_line_start:
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if (input == '\r')
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{
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state_ = expecting_newline_3;
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return pending;
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}
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else if (!req.headers.empty() && (input == ' ' || input == '\t'))
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{
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state_ = header_lws;
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return pending;
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}
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else if (!Util::is_char(input) || Util::is_ctl(input) || Util::is_tspecial(input))
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{
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return fail;
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}
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else
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{
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req.headers.push_back(Header());
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req.headers.back().name.push_back(input);
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state_ = header_name;
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return pending;
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}
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case header_lws:
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if (input == '\r')
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{
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state_ = expecting_newline_2;
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return pending;
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}
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else if (input == ' ' || input == '\t')
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{
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return pending;
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}
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else if (Util::is_ctl(input))
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{
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return fail;
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}
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else
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{
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state_ = header_value;
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req.headers.back().value.push_back(input);
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return pending;
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}
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case header_name:
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if (input == ':')
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{
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state_ = space_before_header_value;
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return pending;
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}
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else if (!Util::is_char(input) || Util::is_ctl(input) || Util::is_tspecial(input))
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{
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return fail;
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}
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else
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{
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req.headers.back().name.push_back(input);
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return pending;
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}
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case space_before_header_value:
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if (input == ' ')
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{
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state_ = header_value;
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return pending;
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}
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else
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{
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return fail;
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}
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case header_value:
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if (input == '\r')
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{
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state_ = expecting_newline_2;
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return pending;
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}
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else if (Util::is_ctl(input))
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{
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return fail;
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}
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else
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{
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req.headers.back().value.push_back(input);
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return pending;
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}
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case expecting_newline_2:
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if (input == '\n')
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{
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state_ = header_line_start;
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return pending;
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}
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else
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{
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return fail;
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}
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case expecting_newline_3:
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if (input == '\n')
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return success;
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else
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return fail;
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default:
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return fail;
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}
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}
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private:
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// The current state of the parser.
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state state_;
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};
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struct RequestType
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{
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typedef Request State;
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typedef RequestParser Parser;
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};
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}
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}
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#endif
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