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alertracker.cc
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alertracker.cc
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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 <string>
#include <vector>
#include <sstream>
#include "alertracker.h"
#include "base64.h"
#include "configfile.h"
#include "devicetracker.h"
#include "json_adapter.h"
#include "kis_databaselogfile.h"
#include "trackedelement_workers.h"
alert_tracker::alert_tracker() : lifetime_global() {
alert_mutex.set_name("alertracker");
next_alert_id = 0;
packetchain = Globalreg::fetch_mandatory_global_as<packet_chain>();
entrytracker = Globalreg::fetch_mandatory_global_as<entry_tracker>();
eventbus = Globalreg::fetch_mandatory_global_as<event_bus>();
alert_vec_id =
entrytracker->register_field("kismet.alert.list",
tracker_element_factory<tracker_element_vector>(),
"list of alerts");
alert_timestamp_id =
entrytracker->register_field("kismet.alert.timestamp",
tracker_element_factory<tracker_element_double>(),
"alert update timestamp");
alert_entry_id =
entrytracker->register_field("kismet.alert.alert",
tracker_element_factory<tracked_alert>(),
"Kismet alert");
alert_defs_vec =
entrytracker->register_and_get_field_as<tracker_element_vector>("kismet.alert.definition_list",
tracker_element_factory<tracker_element_vector>(),
"Kismet alert definitions");
alert_backlog_vec =
entrytracker->register_and_get_field_as<tracker_element_vector>("kismet.alert.backlog",
tracker_element_factory<tracker_element_vector>(),
"Kismet alerts");
alert_def_id =
entrytracker->register_field("kismet.alert.alert_definition",
tracker_element_factory<tracked_alert_definition>(),
"Kismet alert definition");
// Register the alert component
pack_comp_alert =
packetchain->register_packet_component("alert");
// Register the GPS component
pack_comp_gps =
packetchain->register_packet_component("GPS");
// Register a KISMET alert type with no rate restrictions
alert_ref_kismet =
register_alert("KISMET",
"SYSTEM", kis_alert_severity::info,
"Server events",
sat_day, 0, sat_day, 0, KIS_PHY_ANY);
auto httpd = Globalreg::fetch_mandatory_global_as<kis_net_beast_httpd>();
httpd->register_route("/alerts/definitions/define_alert", {"POST"}, httpd->LOGON_ROLE, {"cmd"},
std::make_shared<kis_net_web_function_endpoint>(
[this](std::shared_ptr<kis_net_beast_httpd_connection> con) {
return define_alert_endpoint(con);
}));
httpd->register_route("/alerts/raise_alerts", {"POST"}, httpd->LOGON_ROLE, {"cmd"},
std::make_shared<kis_net_web_function_endpoint>(
[this](std::shared_ptr<kis_net_beast_httpd_connection> con) {
return raise_alert_endpoint(con);
}));
httpd->register_route("/alerts/definitions", {"GET", "POST"}, httpd->RO_ROLE, {},
std::make_shared<kis_net_web_tracked_endpoint>(alert_defs_vec, alert_mutex));
httpd->register_route("/alerts/all_alerts", {"GET", "POST"}, httpd->RO_ROLE, {},
std::make_shared<kis_net_web_tracked_endpoint>(alert_backlog_vec, alert_mutex));
httpd->register_route("/alerts/alerts_view", {"GET", "POST"}, httpd->RO_ROLE, {},
std::make_shared<kis_net_web_function_endpoint>(
[this](std::shared_ptr<kis_net_beast_httpd_connection> con) {
return alert_dt_endpoint(con);
}));
httpd->register_route("/alerts/by-id/:alertid/alert", {"GET", "POST"}, httpd->RO_ROLE, {},
std::make_shared<kis_net_web_tracked_endpoint>(
[this](std::shared_ptr<kis_net_beast_httpd_connection> con) -> std::shared_ptr<tracker_element> {
auto hash_k = con->uri_params().find(":alertid");
auto hash = string_to_n<uint32_t>(hash_k->second);
for (const auto& ai : *alert_backlog_vec) {
auto a = std::static_pointer_cast<tracked_alert>(ai);
if (a->get_hash() == hash)
return a;
}
con->set_status(404);
return std::make_shared<tracker_element_map>();
}, alert_mutex));
httpd->register_route("/alerts/last-time/:timestamp/alerts", {"GET", "POST"}, httpd->RO_ROLE, {},
std::make_shared<kis_net_web_tracked_endpoint>(
[this](std::shared_ptr<kis_net_beast_httpd_connection> con) -> std::shared_ptr<tracker_element> {
return last_alerts_endpoint(con, false);
}));
httpd->register_route("/alerts/wrapped/last-time/:timestamp/alerts", {"GET", "POST"}, httpd->RO_ROLE,
{}, std::make_shared<kis_net_web_tracked_endpoint>(
[this](std::shared_ptr<kis_net_beast_httpd_connection> con) -> std::shared_ptr<tracker_element> {
return last_alerts_endpoint(con, true);
}));
#ifdef PRELUDE
prelude_alerts = Globalreg::globalreg->kismet_config->fetch_opt_bool("prelude_alerts", true);
// Start client Prelude
if (prelude_alerts) {
int ret;
try {
ret = prelude_init(0, NULL);
if (ret < 0)
throw Prelude::PreludeError(ret);
} catch (Prelude::PreludeError const & error) {
_MSG_FATAL("Failed to initialize Prelude SIEM connection {}", error.what());
Globalreg::globalreg->fatal_condition = 1;
return;
}
prelude_init_client(PRELUDE_ANALYZER_NAME);
}
#endif
if (Globalreg::globalreg->kismet_config->fetch_opt("alertbacklog") != "") {
int scantmp;
if (sscanf(Globalreg::globalreg->kismet_config->fetch_opt("alertbacklog").c_str(),
"%d", &scantmp) != 1 || scantmp < 0) {
_MSG("Illegal value for 'alertbacklog' in kismet.conf, expected number greater than zero.",
MSGFLAG_FATAL);
Globalreg::globalreg->fatal_condition = 1;
return;
}
num_backlog = scantmp;
}
// Parse config file vector of all alerts
if (parse_alert_config(Globalreg::globalreg->kismet_config) < 0) {
_MSG("Failed to parse alert values from Kismet config file", MSGFLAG_FATAL);
Globalreg::globalreg->fatal_condition = 1;
return;
}
log_alerts = Globalreg::globalreg->kismet_config->fetch_opt_bool("kis_log_alerts", true);
}
alert_tracker::~alert_tracker() {
kis_lock_guard<kis_mutex> lk(alert_mutex, "~alertracker");
Globalreg::globalreg->remove_global("ALERTTRACKER");
Globalreg::globalreg->alertracker = NULL;
#ifdef PRELUDE
if (prelude_alerts) {
prelude_deinit();
delete prelude_client;
}
#endif
}
void alert_tracker::trigger_deferred_startup() {
gpstracker = Globalreg::fetch_mandatory_global_as<gps_tracker>();
}
void alert_tracker::prelude_init_client(const char *analyzer_name) {
#ifdef PRELUDE
try {
std::string version =
Globalreg::globalreg->version_major + "." +
Globalreg::globalreg->version_minor + "." +
Globalreg::globalreg->version_tiny;
prelude_client =
new Prelude::ClientEasy(analyzer_name, 4, PRELUDE_ANALYZER_MODEL,
PRELUDE_ANALYZER_CLASS, PRELUDE_ANALYZER_MANUFACTURER, version.c_str());
prelude_client->start();
} catch (Prelude::PreludeError const & error) {
_MSG_FATAL("alert_tracker failed to initialize connection to Prelude: {}", error.what());
Globalreg::globalreg->fatal_condition = 1;
return;
}
#endif
}
int alert_tracker::register_alert(std::string in_header, std::string in_class,
kis_alert_severity in_severity,
std::string in_description, alert_time_unit in_unit, int in_rate, alert_time_unit in_burstunit,
int in_burst, int in_phy) {
kis_lock_guard<kis_mutex> lk(alert_mutex, "alert_tracker register_alert");
// Bail if this header is registered
if (alert_name_map.find(in_header) != alert_name_map.end()) {
_MSG("Tried to re-register duplicate alert " + in_header, MSGFLAG_ERROR);
return -1;
}
// Make sure we're not going to overstep our range
if ((unsigned int) in_burstunit > sat_day)
in_burstunit = sat_day;
if ((unsigned int) in_unit > sat_day)
in_unit = sat_day;
// Bail if the rates are impossible
if (in_burstunit > in_unit) {
_MSG("Failed to register alert " + in_header + ", time unit for "
"burst rate must be less than or equal to the time unit "
"for the max rate", MSGFLAG_ERROR);
return -1;
}
auto arec =
std::make_shared<tracked_alert_definition>(alert_def_id);
arec->set_alert_ref(next_alert_id++);
arec->set_header(str_upper(in_header));
arec->set_alertclass(str_upper(in_class));
arec->set_severity(static_cast<unsigned int>(in_severity));
arec->set_description(in_description);
arec->set_limit_unit(in_unit);
arec->set_limit_rate(in_rate);
arec->set_burst_unit(in_burstunit);
arec->set_limit_burst(in_burst);
arec->set_phy(in_phy);
arec->set_time_last(0);
alert_name_map.insert(std::make_pair(arec->get_header(), arec->get_alert_ref()));
alert_ref_map.insert(std::make_pair(arec->get_alert_ref(), arec));
alert_defs_vec->push_back(arec);
return arec->get_alert_ref();
}
int alert_tracker::fetch_alert_ref(std::string in_header) {
kis_lock_guard<kis_mutex> lk(alert_mutex, "alert_tracker fetch_alert_ref");
auto ni = alert_name_map.find(in_header);
if (ni != alert_name_map.end())
return ni->second;
return -1;
}
int alert_tracker::check_times(shared_alert_def arec) {
// Alerts limited to 0 are squelched
if (arec->get_limit_rate() == 0) {
return 0;
}
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->get_time_last() < (now.tv_sec -
alert_time_unit_conv[arec->get_limit_unit()])) {
arec->set_total_sent(0);
arec->set_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->get_time_last() < (now.tv_sec -
alert_time_unit_conv[arec->get_burst_unit()])) {
arec->set_burst_sent(0);
}
// If we're under the limit on both, we're good to go
if (arec->get_burst_sent() < arec->get_limit_burst() &&
arec->get_total_sent() < arec->get_limit_rate())
return 1;
return 0;
}
int alert_tracker::potential_alert(int in_ref) {
kis_lock_guard<kis_mutex> lk(alert_mutex, "alert_tracker potential_alert");
std::map<int, shared_alert_def>::iterator aritr = alert_ref_map.find(in_ref);
if (aritr == alert_ref_map.end())
return 0;
shared_alert_def arec = aritr->second;
return check_times(arec);
}
int alert_tracker::raise_alert(int in_ref, std::shared_ptr<kis_packet> in_pack,
mac_addr bssid, mac_addr source, mac_addr dest,
mac_addr other, std::string in_channel, std::string in_text) {
kis_unique_lock<kis_mutex> lock(alert_mutex, std::defer_lock, "alert_tracker raise_alert");
lock.lock();
std::map<int, shared_alert_def>::iterator aritr = alert_ref_map.find(in_ref);
if (aritr == alert_ref_map.end())
return -1;
shared_alert_def arec = aritr->second;
if (in_pack != nullptr) {
in_pack->tag_map["ALERT"] = true;
in_pack->tag_map[fmt::format("ALERT_{}", arec->get_header())] = true;
}
if (check_times(arec) != 1)
return 0;
lock.unlock();
auto info = std::make_shared<kis_alert_info>();
info->header = arec->get_header();
info->alertclass = arec->get_alertclass();
info->severity = arec->get_severity();
info->phy = arec->get_phy();
gettimeofday(&(info->tm), NULL);
info->bssid = bssid;
info->source = source;
info->dest = dest;
info->other = other;
info->channel = in_channel;
info->text = in_text;
if (gpstracker != nullptr)
info->gps = gpstracker->get_best_location();
// Increment and set the timers
arec->inc_burst_sent(1);
arec->inc_total_sent(1);
arec->set_time_last(ts_to_double(info->tm));
lock.lock();
auto alert_t = std::make_shared<tracked_alert>(alert_entry_id, info);
alert_backlog_vec->push_back(alert_t);
if ((int) alert_backlog_vec->size() > num_backlog)
alert_backlog_vec->erase(alert_backlog_vec->begin());
// Publish an alert to the eventbus
auto event = eventbus->get_eventbus_event(alert_event());
event->get_event_content()->insert(alert_event(), alert_t);
eventbus->publish(event);
lock.unlock();
// Try to get the existing alert info
if (in_pack != NULL) {
auto acomp = in_pack->fetch<kis_alert_component>(pack_comp_alert);
// if we don't have an alert container, make one on this packet
if (acomp == nullptr) {
acomp = std::make_shared<kis_alert_component>();
in_pack->insert(pack_comp_alert, acomp);
}
// Attach it to the packet
acomp->alert_vec.push_back(info);
// Also get GPS
auto pack_gpsinfo = in_pack->fetch<kis_gps_packinfo>(pack_comp_gps);
info->gps = pack_gpsinfo;
}
#ifdef PRELUDE
// Send alert to Prelude
if (prelude_alerts)
raise_prelude_alert(in_ref, in_pack, info->bssid, info->source,
info->dest, info->other, info->channel, info->text);
#endif
// Send the text info
_MSG(info->header + " " + info->text, MSGFLAG_ALERT);
return 1;
}
int alert_tracker::raise_one_shot(std::string in_header, std::string in_class,
kis_alert_severity in_severity, std::string in_text, int in_phy) {
kis_unique_lock<kis_mutex> lock(alert_mutex, std::defer_lock, "alert_tracker raise_one_shot");
kis_alert_info info;
info.header = in_header;
info.alertclass = in_class;
info.severity = static_cast<unsigned int>(in_severity);
info.phy = in_phy;
gettimeofday(&(info.tm), NULL);
info.bssid = mac_addr(0);
info.source = mac_addr(0);
info.dest = mac_addr(0);
info.other = mac_addr(0);
info.channel = "";
info.text = in_text;
lock.lock();
auto alert_t = std::make_shared<tracked_alert>(alert_entry_id, &info);
alert_backlog_vec->push_back(alert_t);
if ((int) alert_backlog_vec->size() > num_backlog)
alert_backlog_vec->erase(alert_backlog_vec->begin());
// Publish an alert to the eventbus
auto event = eventbus->get_eventbus_event(alert_event());
event->get_event_content()->insert(alert_event(), alert_t);
eventbus->publish(event);
lock.unlock();
#ifdef PRELUDE
// Send alert to Prelude
if (prelude_alerts)
raise_prelude_one_shot(in_header, in_text);
#endif
// Send the text info
_MSG(info.header + " " + info.text, MSGFLAG_ALERT);
return 1;
}
int alert_tracker::raise_prelude_alert(int in_ref, std::shared_ptr<kis_packet> in_pack,
mac_addr bssid, mac_addr source, mac_addr dest,
mac_addr other, std::string in_channel, std::string in_text) {
#ifdef PRELUDE
try {
mac_addr emptymac = mac_addr(0);
Prelude::IDMEF idmef;
// Classification
idmef.set("alert.classification.text", "Suspicious Kismet event detected");
// Source
if (source != emptymac) {
idmef.set("alert.source(0).node.address(0).category", "mac");
idmef.set("alert.source(0).node.address(0).address", source.mac_to_string().c_str());
}
// Target
if (dest != emptymac) {
idmef.set("alert.target(0).node.address(0).category", "mac");
idmef.set("alert.target(0).node.address(0).address", dest.mac_to_string().c_str());
}
// Assessment
idmef.set("alert.assessment.impact.severity", "high");
idmef.set("alert.assessment.impact.completion", "succeeded");
idmef.set("alert.assessment.impact.description", in_text);
// Additional Data
if (bssid != emptymac) {
idmef.set("alert.additional_data(>>).meaning", "BSSID");
idmef.set("alert.additional_data(-1).data", bssid.mac_to_string().c_str());
}
if (other != emptymac) {
idmef.set("alert.additional_data(>>).meaning", "Other");
idmef.set("alert.additional_data(-1).data", other.mac_to_string().c_str());
}
idmef.set("alert.additional_data(>>).meaning", "Channel");
idmef.set("alert.additional_data(-1).data", in_channel);
idmef.set("alert.additional_data(>>).meaning", "in_ref");
idmef.set("alert.additional_data(-1).data", in_ref);
prelude_client->sendIDMEF(idmef);
} catch (const Prelude::PreludeError& e) {
_MSG_ERROR("Could not send alert to Prelude: {}", e.what());
}
#endif
return 0;
}
int alert_tracker::raise_prelude_one_shot(std::string in_header, std::string in_text) {
#ifdef PRELUDE
try {
mac_addr emptymac = mac_addr(0);
Prelude::IDMEF idmef;
// Classification
idmef.set("alert.classification.text", "Suspicious network detected");
// Assessment
idmef.set("alert.assessment.impact.severity", "high");
idmef.set("alert.assessment.impact.completion", "succeeded");
idmef.set("alert.assessment.impact.description", in_text);
idmef.set("alert.additional_data(>>).alert_type", "in_ref");
idmef.set("alert.additional_data(-1).data", in_header);
prelude_client->sendIDMEF(idmef);
} catch (const Prelude::PreludeError& e) {
_MSG_ERROR("Could not send alert to Prelude: {}", e.what());
}
#endif
return 0;
}
int alert_tracker::parse_alert_str(std::string alert_str, std::string *ret_name,
alert_time_unit *ret_limit_unit, int *ret_limit_rate,
alert_time_unit *ret_limit_burst,
int *ret_burst_rate) {
std::vector<std::string> tokens = str_tokenize(alert_str, ",");
if (tokens.size() != 3) {
_MSG_ERROR("Malformed limits for alert '{}'", alert_str);
return -1;
}
(*ret_name) = str_upper(tokens[0]);
if (parse_rate_unit(str_lower(tokens[1]), ret_limit_unit, ret_limit_rate) != 1 ||
parse_rate_unit(str_lower(tokens[2]), ret_limit_burst, ret_burst_rate) != 1) {
_MSG_ERROR("Malformed limits for alert '{}'", alert_str);
return -1;
}
return 1;
}
// Split up a rate/unit string into real values
int alert_tracker::parse_rate_unit(std::string in_ru, alert_time_unit *ret_unit,
int *ret_rate) {
std::vector<std::string> units = str_tokenize(in_ru, "/");
if (units.size() == 1) {
// Unit is per minute if not specified
(*ret_unit) = sat_minute;
} else {
// Parse the string unit
if (units[1] == "sec" || units[1] == "second") {
(*ret_unit) = sat_second;
} else if (units[1] == "min" || units[1] == "minute") {
(*ret_unit) = sat_minute;
} else if (units[1] == "hr" || units[1] == "hour") {
(*ret_unit) = sat_hour;
} else if (units[1] == "day") {
(*ret_unit) = sat_day;
} else {
_MSG("Invalid time unit for alert rate '" + units[1] + "'",
MSGFLAG_ERROR);
return -1;
}
}
// Get the number
if (sscanf(units[0].c_str(), "%d", ret_rate) != 1) {
_MSG("Invalid rate '" + units[0] + "' for alert", MSGFLAG_ERROR);
return -1;
}
return 1;
}
int alert_tracker::parse_alert_config(config_file *in_conf) {
std::vector<std::string> clines = in_conf->fetch_opt_vec("alert");
for (unsigned int x = 0; x < clines.size(); x++) {
alert_conf_rec *rec = new alert_conf_rec;
if (parse_alert_str(clines[x], &(rec->header), &(rec->limit_unit),
&(rec->limit_rate), &(rec->burst_unit),
&(rec->limit_burst)) < 0) {
_MSG_FATAL("Invalid 'alert' config option {}; expected HEADER,rate,burstrate", clines[x]);
Globalreg::globalreg->fatal_condition = 1;
delete rec;
return -1;
}
alert_conf_map.insert(std::make_pair(rec->header, rec));
}
return 1;
}
int alert_tracker::define_alert(std::string name, alert_time_unit limit_unit, int limit_rate,
alert_time_unit burst_unit, int burst_rate) {
kis_lock_guard<kis_mutex> lk(alert_mutex, "alert_tracker define_alert");
auto ai = alert_conf_map.find(str_upper(name));
if (ai != alert_conf_map.end()) {
_MSG_ERROR("alerttracker - tried to define alert '{}' twice.", name);
return -1;
}
alert_conf_rec *rec = new alert_conf_rec;
rec->header = str_upper(name);
rec->limit_unit = limit_unit;
rec->limit_rate = limit_rate;
rec->burst_unit = burst_unit;
rec->limit_burst = burst_rate;
alert_conf_map.insert(std::make_pair(rec->header, rec));
return 1;
}
int alert_tracker::activate_configured_alert(std::string in_header,
std::string in_class, kis_alert_severity in_severity, std::string in_desc) {
return activate_configured_alert(in_header, in_class, in_severity, in_desc, KIS_PHY_UNKNOWN);
}
int alert_tracker::activate_configured_alert(std::string in_header, std::string in_class,
kis_alert_severity in_severity, std::string in_desc, int in_phy) {
alert_conf_rec *rec;
{
kis_lock_guard<kis_mutex> lk(alert_mutex, "alert_tracker activate_configured_alert");
std::string hdr = str_upper(in_header);
auto hi = alert_conf_map.find(hdr);
if (hi == alert_conf_map.end()) {
_MSG_INFO("Using default rates of 10/min, 1/sec for alert '{}'", in_header);
define_alert(in_header, sat_minute, 10, sat_second, 1);
auto hi_full = alert_conf_map.find(hdr);
if (hi_full == alert_conf_map.end()) {
_MSG_ERROR("Failed to define default rate alert '{}'", in_header);
return -1;
}
rec = hi_full->second;
} else {
rec = hi->second;
}
}
return register_alert(rec->header, in_class, in_severity, in_desc,
rec->limit_unit, rec->limit_rate,
rec->burst_unit, rec->limit_burst, in_phy);
}
int alert_tracker::find_activated_alert(std::string in_header) {
kis_lock_guard<kis_mutex> lk(alert_mutex, "alert_tracker find_activated_alert");
for (auto x : alert_ref_map) {
if (x.second->get_header() == in_header)
return x.first;
}
return -1;
}
std::shared_ptr<tracker_element>
alert_tracker::last_alerts_endpoint(std::shared_ptr<kis_net_beast_httpd_connection> con, bool wrap) {
std::shared_ptr<tracker_element> transmit;
std::shared_ptr<tracker_element_map> wrapper;
std::shared_ptr<tracker_element_vector> msgvec = std::make_shared<tracker_element_vector>(alert_vec_id);
double since_time = 0;
std::ostream os(&con->response_stream());
auto ts_k = con->uri_params().find(":timestamp");
try {
since_time = string_to_n<double>(ts_k->second);
} catch (const std::exception& e) {
con->set_status(400);
return transmit;
}
if (wrap) {
wrapper = std::make_shared<tracker_element_map>();
wrapper->insert(msgvec);
auto ts = std::make_shared<tracker_element_double>(alert_timestamp_id, ts_now_to_double());
wrapper->insert(ts);
transmit = wrapper;
} else {
transmit = msgvec;
}
{
kis_lock_guard<kis_mutex> lk(alert_mutex, "alert_tracker last_alerts_endpoint");
for (auto i : *alert_backlog_vec) {
auto ai = std::static_pointer_cast<tracked_alert>(i);
if (since_time < ai->get_timestamp()) {
msgvec->push_back(ai);
}
}
}
return transmit;
}
void alert_tracker::define_alert_endpoint(std::shared_ptr<kis_net_beast_httpd_connection> con) {
try {
auto name = con->json()["name"].asString();
auto description = con->json()["description"].asString();
auto alertclass = con->json()["class"].asString();
auto severity = int_to_alert_severity(con->json()["severity"].asUInt());
alert_time_unit limit_unit;
int limit_rate;
alert_time_unit burst_unit;
int burst_rate;
if (parse_rate_unit(str_lower(con->json().get("throttle", "").asString()),
&limit_unit, &limit_rate) < 0) {
throw std::runtime_error("could not parse throttle limits");
}
if (parse_rate_unit(str_lower(con->json().get("burst", "").asString()),
&burst_unit, &burst_rate) < 0) {
throw std::runtime_error("could not parse burst limits");
}
int phyid = KIS_PHY_ANY;
auto phyname = con->json().get("phyname", "").asString();
if (phyname != "any" && phyname != "") {
auto devicetracker =
Globalreg::fetch_mandatory_global_as<device_tracker>();
kis_phy_handler *phyh = devicetracker->fetch_phy_handler_by_name(phyname);
if (phyh == NULL)
throw std::runtime_error("could not find phy");
phyid = phyh->fetch_phy_id();
}
if (define_alert(name, limit_unit, limit_rate, burst_unit, burst_rate) < 0) {
con->set_status(503);
std::ostream os(&con->response_stream());
os << "Could not define alert\n";
return;
}
if (activate_configured_alert(name, alertclass, severity, description, phyid) < 0) {
con->set_status(504);
std::ostream os(&con->response_stream());
os << "Could not activate alert after definition\n";
return;
}
} catch (const std::exception& e) {
con->set_status(400);
std::ostream os(&con->response_stream());
os << "Invalid request: " << e.what() << "\n";
return;
}
}
void alert_tracker::raise_alert_endpoint(std::shared_ptr<kis_net_beast_httpd_connection> con) {
std::ostream os(&con->response_stream());
try {
auto name = con->json()["name"].asString();
auto text = con->json()["text"].asString();
auto aref = fetch_alert_ref(name);
if (aref < 0) {
con->set_status(400);
os << "Invalid request: Unknown alert type '" << con->escape_html(name) << "'\n";
return;
}
auto bssid = con->json().get("bssid", "").asString();
auto source = con->json().get("source", "").asString();
auto dest = con->json().get("dest", "").asString();
auto other = con->json().get("other", "").asString();
auto channel = con->json().get("channel", "").asString();
mac_addr bssid_mac, source_mac, dest_mac, other_mac;
if (bssid.length() != 0)
bssid_mac = mac_addr(bssid);
if (source.length() != 0)
source_mac = mac_addr(source);
if (dest.length() != 0)
dest_mac = mac_addr(dest);
if (other.length() != 0)
other_mac = mac_addr(other);
if (bssid_mac.state.error || source_mac.state.error ||
dest_mac.state.error || other_mac.state.error)
throw std::runtime_error("invalid MAC address");
if (!potential_alert(aref))
throw std::runtime_error("alert throttle reached, alert not raised.");
raise_alert(aref, nullptr, bssid_mac, source_mac, dest_mac, other_mac,
channel, text);
} catch (const std::exception& e) {
con->set_status(400);
os << "Invalid request: " << e.what() << "\n";
return;
};
os << "Alert raised\n";
}
void alert_tracker::alert_dt_endpoint(std::shared_ptr<kis_net_beast_httpd_connection> con) {
std::ostream os(&con->response_stream());
auto summary_vec = std::vector<SharedElementSummary>{};
auto rename_map = Globalreg::new_from_pool<tracker_element_serializer::rename_map>();
auto search_term = std::string{};
auto search_paths = std::vector<std::vector<int>>{};
auto order_field = std::vector<int>{};
std::shared_ptr<tracker_element_string_map> wrapper_elem;
std::shared_ptr<tracker_element> transmit;
auto length_elem = std::make_shared<tracker_element_uint64>();
auto start_elem = std::make_shared<tracker_element_uint64>();
auto total_sz_elem = std::make_shared<tracker_element_uint64>();
auto filtered_sz_elem = std::make_shared<tracker_element_uint64>();
auto output_alerts_elem = std::make_shared<tracker_element_vector>();
auto dt_draw_elem = std::make_shared<tracker_element_uint64>();
try {
auto fields = con->json().get("fields", Json::Value(Json::arrayValue));
for (const auto& i : fields) {
if (i.isString()) {
summary_vec.push_back(std::make_shared<tracker_element_summary>(i.asString()));
} else if (i.isArray()) {
if (i.size() != 2)
throw std::runtime_error("Invalid field map, expected [field, rename]");
summary_vec.push_back(std::make_shared<tracker_element_summary>(i[0].asString(),
i[1].asString()));
}
}
} catch (const std::exception& e) {
con->set_status(400);
fmt::print(os, "Invalid request: {}\n", e.what());
}
unsigned int in_window_start = 0;
unsigned int in_window_len = 0;
unsigned int in_dt_draw = 0;
std::string in_order_column_num;
unsigned int in_order_direction = 0;
// Parse DT data
try {
auto column_number_map = con->json()["colmap"];
if (con->json().get("datatable", false).asBool()) {
auto start_k = con->http_variables().find("start");
if (start_k != con->http_variables().end())
in_window_start = string_to_n<unsigned int>(start_k->second);
auto length_k = con->http_variables().find("length");
if (length_k != con->http_variables().end())
in_window_len = string_to_n<unsigned int>(length_k->second);
auto draw_k = con->http_variables().find("draw");
if (draw_k != con->http_variables().end())
in_dt_draw = string_to_n<unsigned int>(draw_k->second);
auto search_k = con->http_variables().find("search[value]");
if (search_k != con->http_variables().end())
search_term = search_k->second;
if (search_term.length() != 0)
for (const auto& svi : summary_vec)
search_paths.push_back(svi->resolved_path);
auto order_k = con->http_variables().find("order[0][column]");
if (order_k != con->http_variables().end())
in_order_column_num = order_k->second;
auto column_index = column_number_map[in_order_column_num];
auto orderdir_k = con->http_variables().find("order[0][dir]");
if (!column_index.isNull() && orderdir_k != con->http_variables().end()) {
if (orderdir_k->second == "asc")
in_order_direction = 1;
else
in_order_direction = 0;
// Resolve the path, we only allow the first one
if (column_index.isArray() && column_index.size() > 0) {
if (column_index[0].isArray()) {
// We only allow the first field, but make sure we're not a nested array
if (column_index[0].size() > 0) {
order_field = tracker_element_summary(column_index[0][0].asString()).resolved_path;
}
} else {
// Otherwise get the first array
if (column_index.size() >= 1) {
order_field = tracker_element_summary(column_index[0].asString()).resolved_path;
}
}
}
}
if (in_window_len > 500)
in_window_len = 500;
// Set the window elements for datatables
length_elem->set(in_window_len);
start_elem->set(in_window_start);
dt_draw_elem->set(in_dt_draw);
// Set up the datatables wrapper
wrapper_elem = std::make_shared<tracker_element_string_map>();
transmit = wrapper_elem;
wrapper_elem->insert("draw", dt_draw_elem);
wrapper_elem->insert("data", output_alerts_elem);
wrapper_elem->insert("recordsTotal", total_sz_elem);
wrapper_elem->insert("recordsFiltered", filtered_sz_elem);
// We transmit the wrapper elem
transmit = wrapper_elem;
}
} catch (const std::exception& e) {
con->set_status(400);
fmt::print(os, "Invalid request: {}\n", e.what());
}
// vector we do work on
auto next_work_vec = std::make_shared<tracker_element_vector>();
// Copy the alerts under lock; in the future this should populate them from the
// databaselog too perhaps
{