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main.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
//
// Contributor:
// - Aaron Meihm [email protected]
package main
import (
"flag"
"fmt"
"os"
"os/signal"
"sync"
"time"
)
var logch chan string
var logActive bool
var queryRequestCh chan queryRequest
var pluginResultCh chan pluginResult
func startRoutines() {
var wg sync.WaitGroup
queryRequestCh = make(chan queryRequest, 128)
pluginResultCh = make(chan pluginResult, 128)
exitNotifyCh := make(chan bool, 12)
stateExitCh := make(chan bool, 1)
queryExitCh := make(chan bool, 1)
integExitCh := make(chan bool, 1)
go func() {
<-exitNotifyCh
stateExitCh <- true
queryExitCh <- true
integExitCh <- true
}()
// Install signal handler
sigch := make(chan os.Signal, 1)
signal.Notify(sigch, os.Interrupt)
go func() {
for _ = range sigch {
logf("caught signal, attempting to exit")
exitNotifyCh <- true
}
}()
wg.Add(1)
go func() {
defer wg.Done()
stateManager(stateExitCh, exitNotifyCh)
}()
wg.Add(1)
go func() {
defer wg.Done()
queryHandler(queryExitCh, exitNotifyCh)
}()
wg.Add(1)
go func() {
defer wg.Done()
integrator(integExitCh, exitNotifyCh)
}()
wg.Wait()
}
func logf(s string, args ...interface{}) {
if !logActive {
return
}
buf := fmt.Sprintf(s, args...)
tstr := time.Now().Format("2006-01-02 15:04:05")
logbuf := fmt.Sprintf("[%v] %v", tstr, buf)
logch <- logbuf
}
func logger() {
for s := range logch {
fmt.Fprintf(os.Stdout, "%v\n", s)
}
}
func main() {
var durstring = flag.String("b", "1h", "indicate how far to query back in plugin test")
var delIndex = flag.Bool("D", false, "delete and recreate state index on startup")
var confPath = flag.String("f", "etc/geomodel.conf", "configuration path")
var overridesPath = flag.String("r", "etc/overrides.conf", "configuration path of overrides file")
var nsAlert = flag.Bool("n", false, "dont send alerts to mozdef")
var initOff = flag.Int("o", 0, "initial state offset in seconds")
var pluginTest = flag.String("p", "", "test plugin; specify plugin name")
var eventIdx = flag.String("I", "", "override event index name from config file")
flag.Parse()
err := cfg.loadConfiguration(*confPath)
if err != nil {
fmt.Fprintf(os.Stderr, "error loading configuration: %v\n", err)
os.Exit(2)
}
cfg.deleteStateIndex = *delIndex
cfg.initialOffset = *initOff
cfg.noSendAlert = *nsAlert
if *eventIdx != "" {
cfg.ES.EventIndex = *eventIdx
}
overrides, err := readOverrides(*overridesPath)
if err != nil {
fmt.Fprintf(os.Stderr, "Error loading overrides config file: %v\n", err)
os.Exit(2)
}
cfg.overrides = overrides
// Initialize the logging routine
var wg sync.WaitGroup
logch = make(chan string, 32)
logActive = true
wg.Add(1)
go func() {
defer wg.Done()
logger()
}()
setStateService(&esStateService{})
err = maxmindInit()
if err != nil {
fmt.Fprintf(os.Stderr, "error initializing maxmind: %v\n", err)
os.Exit(2)
}
err = loadPlugins()
if err != nil {
fmt.Fprintf(os.Stderr, "error loading plugins: %v\n", err)
os.Exit(2)
}
// If we are in plugin test mode, bypass the standard startup
if *pluginTest != "" {
err = runPluginTest(*pluginTest, *durstring)
if err != nil {
fmt.Fprintf(os.Stderr, "error in plugin test: %v\n", err)
os.Exit(1)
}
os.Exit(0)
}
// Start the other primary routines
startRoutines()
logf("routines exited, waiting for logger to finish")
close(logch)
wg.Wait()
fmt.Fprintf(os.Stdout, "exiting\n")
os.Exit(0)
}
func runPluginTest(pname string, durstring string) (err error) {
defer func() {
if e := recover(); e != nil {
err = fmt.Errorf("runPluginTest() -> %v", e)
}
}()
var (
duration time.Duration
p *plugin
)
// We'll get the result back on the plugin result channel
pluginResultCh = make(chan pluginResult, 128)
duration, err = time.ParseDuration(durstring)
if err != nil {
panic(err)
}
for i := range pluginList {
if pluginList[i].name == pname {
p = &pluginList[i]
break
}
}
if p == nil {
panic("plugin not found")
}
// Create a new query request for the test.
now := time.Now().UTC()
qr := queryRequest{
startTime: now.Add(-1 * duration),
endTime: now,
}
err = queryUsingPlugin(*p, qr)
if err != nil {
panic(err)
}
pr := <-pluginResultCh
for _, x := range pr.Results {
fmt.Fprintf(os.Stdout, "%v %v %v %v %v\n", x.Timestamp,
x.Principal, x.SourceIPV4, x.Valid, x.Name)
}
return nil
}