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/*
This file is part of Kismet
Kismet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kismet 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kismet; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "alertracker.h"
#include "server_globals.h"
#include "kismet_server.h"
Alertracker::Alertracker() {
next_alert_id = 0;
max_backlog = 0;
server = NULL;
protoref = -1;
}
Alertracker::~Alertracker() {
for (map<int, alert_rec *>::iterator x = alert_ref_map.begin();
x != alert_ref_map.end(); ++x)
delete x->second;
}
void Alertracker::AddTcpServer(TcpServer *in_server) {
server = in_server;
}
void Alertracker::AddAlertProtoRef(int in_ref) {
protoref = in_ref;
}
void Alertracker::SetAlertBacklog(int in_max) {
max_backlog = in_max;
}
int Alertracker::RegisterAlert(const char *in_header, alert_time_unit in_unit,
int in_rate, alert_time_unit in_burstunit,
int in_burst) {
// Bail if this header is registered
if (alert_name_map.find(in_header) != alert_name_map.end())
return -1;
if (in_burstunit > in_unit)
return -1;
alert_rec *arec = new alert_rec;
arec->ref_index = next_alert_id++;
arec->header = in_header;
arec->limit_unit = in_unit;
arec->limit_rate = in_rate;
arec->burst_unit = in_burstunit;
arec->limit_burst = in_burst;
arec->burst_sent = 0;
arec->time_last = 0;
alert_name_map[arec->header] = arec->ref_index;
alert_ref_map[arec->ref_index] = arec;
return arec->ref_index;
}
int Alertracker::FetchAlertRef(string in_header) {
if (alert_name_map.find(in_header) != alert_name_map.end())
return alert_name_map[in_header];
return -1;
}
int Alertracker::CheckTimes(alert_rec *arec) {
// Is this alert rate-limited? If not, shortcut out and send it
if (arec->limit_rate == 0) {
return 1;
}
struct timeval now;
gettimeofday(&now, NULL);
// If the last time we sent anything was longer than the main rate limit,
// then we reset back to empty
if (arec->time_last < (now.tv_sec - alert_time_unit_conv[arec->limit_unit])) {
arec->total_sent = 0;
arec->burst_sent = 0;
return 1;
}
// If the last time we sent anything was longer than the burst rate, we can
// reset the burst to 0
if (arec->time_last < (now.tv_sec - alert_time_unit_conv[arec->burst_unit])) {
arec->burst_sent = 0;
}
// If we're under the limit on both, we're good to go
if (arec->burst_sent < arec->limit_burst && arec->total_sent < arec->limit_rate) {
return 1;
}
return 0;
}
int Alertracker::PotentialAlert(int in_ref) {
map<int, alert_rec *>::iterator aritr = alert_ref_map.find(in_ref);
if (aritr == alert_ref_map.end())
return -1;
return CheckTimes(aritr->second);
}
int Alertracker::RaiseAlert(int in_ref, mac_addr bssid, mac_addr source,
mac_addr dest, mac_addr other,
int in_channel, string in_text) {
map<int, alert_rec *>::iterator aritr = alert_ref_map.find(in_ref);
if (aritr == alert_ref_map.end())
return -1;
alert_rec *arec = aritr->second;
if (CheckTimes(arec) != 1)
return 0;
ALERT_data *adata = new ALERT_data;
char tmpstr[128];
timeval *ts = new timeval;
gettimeofday(ts, NULL);
snprintf(tmpstr, 128, "%ld", (long int) ts->tv_sec);
adata->sec = tmpstr;
snprintf(tmpstr, 128, "%ld", (long int) ts->tv_usec);
adata->usec = tmpstr;
snprintf(tmpstr, 128, "%d", in_channel);
adata->channel = tmpstr;
adata->text = in_text;
adata->header = arec->header;
adata->bssid = bssid.Mac2String();
adata->source = source.Mac2String();
adata->dest = dest.Mac2String();
adata->other = other.Mac2String();
// Increment and set the timers
arec->burst_sent++;
arec->total_sent++;
arec->time_last = time(0);
alert_backlog.push_back(adata);
if (alert_backlog.size() > max_backlog) {
delete alert_backlog[0];
alert_backlog.erase(alert_backlog.begin());
}
server->SendToAll(protoref, (void *) adata);
// Hook main for sounds and whatnot on the server
KisLocalAlert(in_text.c_str());
return 1;
}
void Alertracker::BlitBacklogged(int in_fd) {
for (unsigned int x = 0; x < alert_backlog.size(); x++)
server->SendToClient(in_fd, protoref, (void *) alert_backlog[x]);
}
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