107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
|
/*
|
||
|
|
*
|
||
|
|
* Copyright (c) 2011-2016 The University of Waikato, Hamilton, New Zealand.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This file is part of libprotoident.
|
||
|
|
*
|
||
|
|
* This code has been developed by the University of Waikato WAND
|
||
|
|
* research group. For further information please see http://www.wand.net.nz/
|
||
|
|
*
|
||
|
|
* libprotoident is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* libprotoident is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include "libprotoident.h"
|
||
|
|
#include "proto_manager.h"
|
||
|
|
#include "proto_common.h"
|
||
|
|
|
||
|
|
|
||
|
|
static inline bool match_http_response(uint32_t payload, uint32_t len) {
|
||
|
|
|
||
|
|
if (len == 0)
|
||
|
|
return true;
|
||
|
|
if (len == 1 && MATCH(payload, 'H', 0x00, 0x00, 0x00))
|
||
|
|
return true;
|
||
|
|
if (MATCHSTR(payload, "HTTP")) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* UNKNOWN seems to be a valid response from some servers, e.g.
|
||
|
|
* mini_httpd */
|
||
|
|
if (MATCHSTR(payload, "UNKN")) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool match_http(lpi_data_t *data, lpi_module_t *mod) {
|
||
|
|
|
||
|
|
|
||
|
|
/* Need to rule out protocols using HTTP-style commands to do
|
||
|
|
* exchanges. These protocols primarily use GET, rather than other
|
||
|
|
* HTTP requests */
|
||
|
|
if (!valid_http_port(data)) {
|
||
|
|
if (match_str_either(data, "GET "))
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (match_http_request(data->payload[0], data->payload_len[0])) {
|
||
|
|
if (match_http_response(data->payload[1], data->payload_len[1]))
|
||
|
|
return true;
|
||
|
|
if (match_http_request(data->payload[1], data->payload_len[1]))
|
||
|
|
return true;
|
||
|
|
if (match_file_header(data->payload[1]) &&
|
||
|
|
data->payload_len[0] != 0)
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (match_http_request(data->payload[1], data->payload_len[1])) {
|
||
|
|
if (match_http_response(data->payload[0], data->payload_len[0]))
|
||
|
|
return true;
|
||
|
|
if (match_file_header(data->payload[0]) &&
|
||
|
|
data->payload_len[1] != 0)
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Allow responses in both directions, even if this is doesn't entirely
|
||
|
|
* make sense :/ */
|
||
|
|
if (match_http_response(data->payload[0], data->payload_len[0])) {
|
||
|
|
if (match_http_response(data->payload[1], data->payload_len[1]))
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
return false;
|
||
|
|
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static lpi_module_t lpi_http = {
|
||
|
|
LPI_PROTO_HTTP,
|
||
|
|
LPI_CATEGORY_WEB,
|
||
|
|
"HTTP",
|
||
|
|
2,
|
||
|
|
match_http
|
||
|
|
};
|
||
|
|
|
||
|
|
void register_http(LPIModuleMap *mod_map) {
|
||
|
|
register_protocol(&lpi_http, mod_map);
|
||
|
|
}
|
||
|
|
|