mirror of
https://github.com/vel21ripn/nDPI.git
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93 lines
3.7 KiB
C
93 lines
3.7 KiB
C
/*
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* flash.c
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*
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* Copyright (C) 2009-2011 by ipoque GmbH
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* Copyright (C) 2011-19 - ntop.org
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*
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* This file is part of nDPI, an open source deep packet inspection
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* library based on the OpenDPI and PACE technology by ipoque GmbH
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*
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* nDPI is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* nDPI 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "ndpi_protocols.h"
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#ifdef NDPI_PROTOCOL_FLASH
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static void ndpi_int_flash_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
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{
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ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_FLASH);
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}
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void ndpi_search_flash(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
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{
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struct ndpi_packet_struct *packet = &flow->packet;
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// struct ndpi_id_struct *src=ndpi_struct->src;
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// struct ndpi_id_struct *dst=ndpi_struct->dst;
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if (flow->l4.tcp.flash_stage == 0 && packet->payload_packet_len > 0
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&& (packet->payload[0] == 0x03 || packet->payload[0] == 0x06)) {
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flow->l4.tcp.flash_bytes = packet->payload_packet_len;
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if (packet->tcp->psh == 0) {
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NDPI_LOG(NDPI_PROTOCOL_FLASH, ndpi_struct, NDPI_LOG_DEBUG, "FLASH pass 1: \n");
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flow->l4.tcp.flash_stage = packet->packet_direction + 1;
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NDPI_LOG(NDPI_PROTOCOL_FLASH, ndpi_struct, NDPI_LOG_DEBUG,
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"FLASH pass 1: flash_stage: %u, flash_bytes: %u\n", flow->l4.tcp.flash_stage,
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flow->l4.tcp.flash_bytes);
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return;
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} else if (packet->tcp->psh != 0 && flow->l4.tcp.flash_bytes == 1537) {
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NDPI_LOG(NDPI_PROTOCOL_FLASH, ndpi_struct, NDPI_LOG_DEBUG,
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"FLASH hit: flash_stage: %u, flash_bytes: %u\n", flow->l4.tcp.flash_stage,
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flow->l4.tcp.flash_bytes);
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flow->l4.tcp.flash_stage = 3;
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ndpi_int_flash_add_connection(ndpi_struct, flow);
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return;
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}
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} else if (flow->l4.tcp.flash_stage == 1 + packet->packet_direction) {
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flow->l4.tcp.flash_bytes += packet->payload_packet_len;
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if (packet->tcp->psh != 0 && flow->l4.tcp.flash_bytes == 1537) {
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NDPI_LOG(NDPI_PROTOCOL_FLASH, ndpi_struct, NDPI_LOG_DEBUG,
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"FLASH hit: flash_stage: %u, flash_bytes: %u\n", flow->l4.tcp.flash_stage,
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flow->l4.tcp.flash_bytes);
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flow->l4.tcp.flash_stage = 3;
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ndpi_int_flash_add_connection(ndpi_struct, flow);
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return;
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} else if (packet->tcp->psh == 0 && flow->l4.tcp.flash_bytes < 1537) {
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NDPI_LOG(NDPI_PROTOCOL_FLASH, ndpi_struct, NDPI_LOG_DEBUG,
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"FLASH pass 2: flash_stage: %u, flash_bytes: %u\n", flow->l4.tcp.flash_stage,
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flow->l4.tcp.flash_bytes);
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return;
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}
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}
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NDPI_LOG(NDPI_PROTOCOL_FLASH, ndpi_struct, NDPI_LOG_DEBUG,
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"FLASH might be excluded: flash_stage: %u, flash_bytes: %u, packet_direction: %u\n",
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flow->l4.tcp.flash_stage, flow->l4.tcp.flash_bytes, packet->packet_direction);
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#ifdef NDPI_PROTOCOL_HTTP
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if (NDPI_COMPARE_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_HTTP) != 0) {
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#endif /* NDPI_PROTOCOL_HTTP */
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NDPI_LOG(NDPI_PROTOCOL_FLASH, ndpi_struct, NDPI_LOG_DEBUG, "FLASH: exclude\n");
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NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_FLASH);
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#ifdef NDPI_PROTOCOL_HTTP
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} else {
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NDPI_LOG(NDPI_PROTOCOL_FLASH, ndpi_struct, NDPI_LOG_DEBUG, "FLASH avoid early exclude from http\n");
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}
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#endif /* NDPI_PROTOCOL_HTTP */
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}
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#endif
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