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/*
* amqp.c
*
* Copyright (C) 2011-22 - ntop.org
*
* nDPI 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.
*
* nDPI 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 nDPI. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ndpi_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_AMQP
#include "ndpi_api.h"
#include "ndpi_private.h"
PACK_ON
struct amqp_header {
u_int8_t ptype;
u_int16_t channel;
u_int32_t length;
u_int16_t class_id, method;
} PACK_OFF;
static void ndpi_int_amqp_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow) {
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_AMQP, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
static void ndpi_search_amqp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
NDPI_LOG_DBG(ndpi_struct, "search amqp\n");
if(packet->payload_packet_len > sizeof(struct amqp_header)) {
struct amqp_header *h = (struct amqp_header*)packet->payload;
if(h->ptype <= 3) {
u_int32_t length = htonl(h->length);
if(((length+8) >= packet->payload_packet_len)
&& (length < 32768) /* Upper bound */) {
u_int16_t class_id = htons(h->class_id);
if((class_id >= 10) /* Connection */
&& (class_id <= 110) /* Tunnel */) {
u_int16_t method = htons(h->method);
if(method <= 120 /* Method basic NACK */) {
NDPI_LOG_INFO(ndpi_struct, "found amqp over tcp\n");
ndpi_int_amqp_add_connection(ndpi_struct, flow);
return;
}
}
}
}
}
if(flow->packet_counter > 5)
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_amqp_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id) {
ndpi_set_bitmask_protocol_detection("AMQP", ndpi_struct, *id,
NDPI_PROTOCOL_AMQP,
ndpi_search_amqp,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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