mirror of
https://github.com/ntop/ntopng.git
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126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
/*
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*
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* (C) 2013-18 - 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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// #define AS_RTT_DEBUG 1
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/* *************************************** */
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AutonomousSystem::AutonomousSystem(NetworkInterface *_iface, IpAddress *ipa) : GenericHashEntry(_iface), GenericTrafficElement() {
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asname = NULL;
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round_trip_time = 0;
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ntop->getGeolocation()->getAS(ipa, &asn, &asname);
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#ifdef AS_DEBUG
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ntop->getTrace()->traceEvent(TRACE_NORMAL, "Created Autonomous System %u", asn);
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#endif
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}
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/* *************************************** */
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AutonomousSystem::~AutonomousSystem() {
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if(asname) free(asname);
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/* TODO: decide if it is useful to dump AS stats to redis */
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#ifdef AS_DEBUG
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ntop->getTrace()->traceEvent(TRACE_NORMAL, "Deleted Autonomous System %u", asn);
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#endif
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}
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/* *************************************** */
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void AutonomousSystem::updateRoundTripTime(u_int32_t rtt_msecs) {
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/* EWMA formula is EWMA(n) = (alpha_percent * sample + (100 - alpha_percent) * EWMA(n-1)) / 100
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We read the EWMA alpha_percent from the preferences
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*/
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u_int8_t ewma_alpha_percent = ntop->getPrefs()->get_ewma_alpha_percent();
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#ifdef AS_RTT_DEBUG
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u_int32_t old_rtt = round_trip_time;
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#endif
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if(round_trip_time)
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Utils::update_ewma(rtt_msecs, &round_trip_time, ewma_alpha_percent);
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else
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round_trip_time = rtt_msecs;
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#ifdef AS_RTT_DEBUG
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printf("Updating rtt EWMA: [asn: %u][sample msecs: %u][old rtt: %u][new rtt: %u][alpha percent: %u]\n",
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asn, rtt_msecs, old_rtt, round_trip_time, ewma_alpha_percent);
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#endif
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}
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/* *************************************** */
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bool AutonomousSystem::idle() {
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bool rc;
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if((num_uses > 0) || (!iface->is_purge_idle_interface()))
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return(false);
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rc = isIdle(MAX_LOCAL_HOST_IDLE);
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#ifdef AS_DEBUG
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ntop->getTrace()->traceEvent(TRACE_NORMAL, " Autonomous System %u is idle [uses %u][%s][last: %u][diff: %d]",
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asn, num_uses,
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rc ? "Idle" : "Not Idle",
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last_seen, iface->getTimeLastPktRcvd() - (last_seen+MAX_LOCAL_HOST_IDLE));
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#endif
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return(rc);
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}
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/* *************************************** */
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void AutonomousSystem::lua(lua_State* vm, DetailsLevel details_level, bool asListElement) {
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lua_newtable(vm);
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lua_push_int_table_entry(vm, "asn", asn);
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lua_push_str_table_entry(vm, "asname", asname ? asname : (char*)"");
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lua_push_int_table_entry(vm, "bytes.sent", sent.getNumBytes());
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lua_push_int_table_entry(vm, "bytes.rcvd", rcvd.getNumBytes());
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if(details_level >= details_high) {
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((GenericTrafficElement*)this)->lua(vm, true);
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lua_push_int_table_entry(vm, "seen.first", first_seen);
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lua_push_int_table_entry(vm, "seen.last", last_seen);
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lua_push_int_table_entry(vm, "duration", get_duration());
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lua_push_int_table_entry(vm, "num_hosts", getNumHosts());
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lua_push_int_table_entry(vm, "round_trip_time", round_trip_time);
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if(details_level >= details_higher)
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if(ndpiStats) ndpiStats->lua(iface, vm);
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}
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if(asListElement) {
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lua_pushnumber(vm, asn);
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lua_insert(vm, -2);
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lua_settable(vm, -3);
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}
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}
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/* *************************************** */
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bool AutonomousSystem::equal(u_int32_t _asn) {
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return(asn == _asn);
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}
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