mirror of
https://github.com/ntop/ntopng.git
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130 lines
5 KiB
C++
130 lines
5 KiB
C++
/*
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*
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* (C) 2013-21 - ntop.org
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*
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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 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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* 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; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include "ntop_includes.h"
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#include "flow_checks_includes.h"
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/* ***************************************************** */
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void TCPPacketsIssues::checkTCPPacketsIssues(Flow *f) {
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if (f->get_packets() == 0)
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return;
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else {
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FlowAlertType alert_type = TCPPacketsIssuesAlert::getClassType();
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u_int8_t c_score, s_score;
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risk_percentage cli_score_pctg = CLIENT_FAIR_RISK_PERCENTAGE;
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FlowTrafficStats *stats = f->getTrafficStats();
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u_int64_t retransmission = stats ? (stats->get_cli2srv_tcp_retr() +
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stats->get_srv2cli_tcp_retr())
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: 0,
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out_of_order = stats ? (stats->get_cli2srv_tcp_ooo() +
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stats->get_srv2cli_tcp_ooo())
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: 0,
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lost = stats ? (stats->get_cli2srv_tcp_lost() +
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stats->get_srv2cli_tcp_lost())
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: 0;
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u_int8_t retransmission_pctg =
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(u_int8_t)retransmission * 100 / f->get_packets();
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u_int8_t out_of_order_pctg =
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(u_int8_t)out_of_order * 100 / f->get_packets();
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u_int8_t lost_pctg = (u_int8_t)lost * 100 / f->get_packets();
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if (retransmission_pctg <= retransmission_threshold &&
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out_of_order_pctg <= out_of_order_threshold &&
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lost_pctg <= lost_threshold)
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return; /* Thresholds not exceeded */
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#ifdef DEBUG_PACKETS_ISSUES
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ntop->getTrace()->traceEvent(
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TRACE_NORMAL, "Retransmissions: %u | %u % | Threshold: %u %",
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retransmission, retransmission_pctg, retransmission_threshold);
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ntop->getTrace()->traceEvent(
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TRACE_NORMAL, "Out of Order: %u | %u % | Threshold: %u %", out_of_order,
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out_of_order_pctg, out_of_order_threshold);
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ntop->getTrace()->traceEvent(TRACE_NORMAL,
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"Loss: %u | %u % | Threshold: %u %", lost,
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lost_pctg, lost_threshold);
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#endif /* DEBUG_PACKETS_ISSUES */
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computeCliSrvScore(ntop->getFlowAlertScore(alert_type.id), cli_score_pctg, &c_score, &s_score);
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f->triggerAlertAsync(alert_type, c_score, s_score);
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}
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}
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/* ***************************************************** */
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void TCPPacketsIssues::periodicUpdate(Flow *f) { checkTCPPacketsIssues(f); }
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/* ***************************************************** */
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void TCPPacketsIssues::flowEnd(Flow *f) { checkTCPPacketsIssues(f); }
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/* ***************************************************** */
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FlowAlert *TCPPacketsIssues::buildAlert(Flow *f) {
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return new TCPPacketsIssuesAlert(this, f, retransmission_threshold,
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out_of_order_threshold, lost_threshold);
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}
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/* ***************************************************** */
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bool TCPPacketsIssues::loadConfiguration(json_object *config) {
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bool enabled = false;
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json_object *json_table, *json_bytes;
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FlowCheck::loadConfiguration(config); /* Parse parameters in common */
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/* Retransmission threshold */
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if (json_object_object_get_ex(config, "retransmissions", &json_table)) {
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if (json_object_object_get_ex(json_table, "threshold", &json_bytes))
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retransmission_threshold = json_object_get_int64(json_bytes);
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if (json_object_object_get_ex(json_table, "enabled", &json_bytes))
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enabled = json_object_get_int64(json_bytes);
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if (!enabled) retransmission_threshold = (u_int64_t)-1;
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}
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/* Out of Order threshold */
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if (json_object_object_get_ex(config, "out_of_orders", &json_table)) {
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if (json_object_object_get_ex(json_table, "threshold", &json_bytes))
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out_of_order_threshold = json_object_get_int64(json_bytes);
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if (json_object_object_get_ex(json_table, "enabled", &json_bytes))
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enabled = json_object_get_int64(json_bytes);
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if (!enabled) out_of_order_threshold = (u_int64_t)-1;
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}
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/* Lost threshold */
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if (json_object_object_get_ex(config, "packet_loss", &json_table)) {
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if (json_object_object_get_ex(json_table, "threshold", &json_bytes))
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lost_threshold = json_object_get_int64(json_bytes);
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if (json_object_object_get_ex(json_table, "enabled", &json_bytes))
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enabled = json_object_get_int64(json_bytes);
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if (!enabled) lost_threshold = (u_int64_t)-1;
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}
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return (true);
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}
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/* ***************************************************** */
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