/
sipcallmon_main.go
687 lines (630 loc) · 18.2 KB
/
sipcallmon_main.go
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// Copyright 2019-2020 Intuitive Labs GmbH. All rights reserved.
//
// Use of this source code is governed by a source-available license
// that can be found in the LICENSE.txt file in the root of the source
// tree.
package sipcallmon
import (
"context"
"fmt"
"math/rand"
"net/http"
"os"
"strings"
"sync"
"sync/atomic"
"time"
"unsafe"
"github.com/intuitivelabs/calltr"
"github.com/intuitivelabs/counters"
"github.com/intuitivelabs/slog"
"github.com/intuitivelabs/timestamp"
"github.com/intuitivelabs/wtimer"
)
const Version = "0.8.20"
var BuildTags []string
var RunningCfg *Config
// ugly temporary hack
var waitgrp *sync.WaitGroup
var stopProcessing uint32 // if set to 1, will stop (atomic access)
var stopCh chan struct{} // stop channel used by Stop() to stop threads a.s.o.
var gcTicker *time.Ticker
var httpSrv *http.Server
var acmeIPFIXsrv *AcmeIPFIXcollector
var stopLock sync.Mutex // avoid running Stop() in parallel
// pcap per call-id dump
var pcapDumper PcapWriter
var PcapDumperCfg PcapWriterCfg
// global counters / stats
type evrGCcounters struct {
runs counters.Handle
tgtMet counters.Handle
n counters.Handle
rmvd counters.Handle
to counters.Handle
gcMticks counters.Handle // missed gc ticks
}
type evrCounters struct {
no counters.Handle // total evs
blstType counters.Handle // blacklist based on type
blstRate counters.Handle // blacklist on rate exceeded evs
trackFail counters.Handle // no rate entry could be created (oom)
blstSent counters.Handle // sent blst events
blstRec counters.Handle // recovered (previously blacklisted)
}
var evrGCstats *counters.Group
var evrGCcnts evrGCcounters
var evrStats *counters.Group
var evrCnts evrCounters
var cntEvRpGCruns counters.Handle
var cntEvRpGCtgtMet counters.Handle
var cntEvRpGCn counters.Handle
var cntEvRpGCto counters.Handle
// Stop() would signal Run() to exit the processing loop.
func Stop() {
stopLock.Lock()
if stopCh != nil {
close(stopCh)
}
if gcTicker != nil && gcTicker.C != nil {
gcTicker.Stop()
}
atomic.StoreUint32(&stopProcessing, 1)
// stop web server
if httpSrv != nil {
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
if err := httpSrv.Shutdown(ctx); err != nil {
WARN("http server shutdown failed: %s\n", err)
httpSrv.Close() // force Close() just to be sure
}
}
// ipfix srv shutdown
if acmeIPFIXsrv != nil && acmeIPFIXsrv.IsInit() {
acmeIPFIXsrv.Stop()
acmeIPFIXsrv = nil
}
if waitgrp != nil {
waitgrp.Wait()
}
stopCh = nil
gcTicker = nil
httpSrv = nil
pcapDumper.Stop()
stopLock.Unlock()
}
// EvRateBlstGCChangeIntvl changes the interval used for the periodic GC.
func EvRateBlstGCChangeIntvl(intvl time.Duration) bool {
p := (*unsafe.Pointer)((unsafe.Pointer)(&gcTicker))
t := (*time.Ticker)(atomic.LoadPointer(p))
if t != nil {
if intvl == 0 {
// disable
t.Stop()
return true
}
t.Reset(intvl) // should work even if the timer is stopped
} else {
// no ticker started
if intvl == 0 {
return true
}
if stopCh == nil {
// no stop channel, bail out (called before start or after stop)
return false
}
// not started => start it
ticker := time.NewTicker(intvl)
if atomic.CompareAndSwapPointer(p, nil, unsafe.Pointer(ticker)) {
// success, nobody changed it in parallel
evRateBlstStartGC(ticker, stopCh)
} else {
// parallel change -> give up on our ticker and change the new one
ticker.Stop()
t := (*time.Ticker)(atomic.LoadPointer(p))
t.Reset(intvl)
}
}
return true
}
// evRateBlstLoop runs the ev rate garbage collection periodically
// (based on the passed time.Ticker). It should be run in a separate
// thread.
func evRateBlstGCRun(ticker *time.Ticker, done chan struct{}) {
defer waitgrp.Done()
m := calltr.MatchEvRTS{
OpEx: calltr.MOpEQ,
Ex: false, // match non exceeded value only
OpOkLastT: calltr.MOpGT, // match last (time) OK older then ...
// OkLastT filled each time
}
missed := 0
mainloop:
for {
select {
case <-done:
break mainloop
case _, ok := <-ticker.C:
if !ok {
break mainloop
}
evrGCstats.Inc(evrGCcnts.runs)
lifetime := time.Duration(
atomic.LoadInt64((*int64)(&RunningCfg.EvRgcOldAge)))
maxRunT := time.Duration(
atomic.LoadInt64((*int64)(&RunningCfg.EvRgcMaxRunT)))
target := atomic.LoadUint64(&RunningCfg.EvRgcTarget)
now := timestamp.Now()
m.OkLastT = now.Add(-lifetime)
runLim := now.Add(maxRunT)
// run GC
//e0 := EvRateBlst.CrtEntries()
tgt, n, rmvd, to := EvRateBlst.ForceEvict(target, m, now, runLim)
//e1 := EvRateBlst.CrtEntries()
// DBG("GC run => target met: %v (%v / %v) n: %v / %v timeout: %v\n", tgt, e1, e0, n, e0, to)
evrGCstats.Set(evrGCcnts.n, counters.Val(n))
evrGCstats.Set(evrGCcnts.rmvd, counters.Val(rmvd))
if tgt {
evrGCstats.Inc(evrGCcnts.tgtMet)
}
if to {
evrGCstats.Inc(evrGCcnts.to)
}
// check if another tick passed
missed = 0
checkmissed:
for {
select {
case _, ok = <-ticker.C:
missed++
default:
break checkmissed
}
}
if !ok { // ticker.C closed
break mainloop
}
if missed > 0 {
// GC takes more then 1 tick
evrGCstats.Add(evrGCcnts.gcMticks, counters.Val(missed))
if DBGon() {
DBG("GC run missed ticks: %v\n", timestamp.Now().Sub(now))
}
}
}
}
}
// returns a random ascii letters string of len n
// (not optimised for speed, intended for init use)
func randStr(n int) string {
const chSet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
var b = make([]byte, n)
for i := 0; i < n; i++ {
b[i] = chSet[rand.Intn(len(chSet))]
}
return *(*string)(unsafe.Pointer(&b)) // avoid slice copy + alloc
}
// generic function for registering counters, with retries with random
// sufixes in case the counter group with the given name already exists
// and is incompatible.
func registerCounters(name string,
parent *counters.Group,
grp **counters.Group,
defs []counters.Def, minEntries, retries int) error {
grNroot := name
grName := grNroot
g := *grp
entries := minEntries
if entries < len(defs) {
entries = len(defs)
}
if g == nil {
g = counters.NewGroup(grName, parent, entries)
}
if g == nil {
// try to register with another name
for i := 0; i < retries; i++ {
grName := grNroot + "_" + randStr(4)
g = counters.NewGroup(grName, parent, entries)
if g != nil {
break
}
}
if g == nil {
return fmt.Errorf("failed to alloc counters group (%q...)\n",
grName)
}
}
if !g.RegisterDefs(defs) {
return fmt.Errorf("failed to register counters (%d to %s)\n",
len(defs), grName)
}
*grp = g
return nil
}
func evRateBlstStartGC(ticker *time.Ticker, done chan struct{}) {
waitgrp.Add(1)
go evRateBlstGCRun(ticker, done)
}
func initLogs(cfg *Config) {
slog.Init(&Log, slog.LogLevel(cfg.LogLev), slog.LogOptions(cfg.LogOpt),
slog.LStdErr)
slog.Init(&Plog, slog.LogLevel(cfg.ParseLogLev),
slog.LogOptions(cfg.ParseLogOpt), slog.LStdErr)
// calltr log
slog.Init(&calltr.Log, slog.LogLevel(cfg.LogLev),
slog.LogOptions(cfg.LogOpt), slog.LStdErr)
slog.Init(&wtimer.Log, slog.LogLevel(cfg.LogLev),
slog.LogOptions(cfg.LogOpt), slog.LStdErr)
// init also the default slog log (used directly by sipsp)
slog.DefaultLogInit(slog.LogLevel(cfg.LogLev), slog.LogOptions(cfg.LogOpt),
slog.LStdErr)
}
// Init pre-initializes sipcallmon.
func Init(cfg *Config) error {
if err := statsInit(); err != nil {
return err
}
// register http & ws stats only if configured with websocket ports
if len(cfg.WSports) > 0 {
if err := httpStatsInit(); err != nil {
return err
}
}
if cfg == nil {
return fmt.Errorf("invalid nil config in Init\n")
}
// save actual config for global ref.
RunningCfg = cfg
// logging
initLogs(cfg)
// forward config options to calltr
calltrCfg := *calltr.GetCfg()
calltrCfg.RegDelta = uint32(cfg.RegDelta)
calltrCfg.RegDelDelay = int32(cfg.RegDelDelay)
calltrCfg.ContactIgnorePort = cfg.ContactIgnorePort
calltrCfg.Mem.MaxCallEntries = uint64(cfg.CallStMax)
calltrCfg.Mem.MaxCallEntriesMem = cfg.CallStMaxMem
calltrCfg.Mem.MaxRegEntries = uint64(cfg.RegsMax)
calltrCfg.Mem.MaxRegEntriesMem = cfg.RegsMaxMem
calltrCfg.Dbg = calltr.DbgFlags(cfg.DbgCalltr)
for callst, to := range cfg.CallStTo {
cs, perr := parseCallStateName(callst)
if perr != nil {
return fmt.Errorf("invalid calls_timeout value: %v", perr)
}
if to <= 0 {
// special value, reset to default
if !calltr.StateTimeoutSet(&calltrCfg, cs,
calltr.StateTimeoutDefault(cs)) {
min, max := calltr.StateTimeoutRange(cs)
return fmt.Errorf("invalid default timeout value for "+
"%s : %d s (%v) (range %v - %v)",
callst, -calltr.StateTimeoutDefault(cs), to, min, max)
}
} else {
seconds := uint(to / time.Second)
if !calltr.StateTimeoutSet(&calltrCfg, cs, seconds) {
min, max := calltr.StateTimeoutRange(cs)
return fmt.Errorf("invalid timeout value for %s : %d s"+
" (range %v - %v)", callst, seconds, min, max)
}
}
}
calltr.SetCfg(&calltrCfg)
// init evr GC counters
evrGCcntDefs := [...]counters.Def{
{&evrGCcnts.runs, 0, nil, nil, "gc_runs",
"periodic GC runs"},
{&evrGCcnts.tgtMet, 0, nil, nil, "gc_target_met",
"how many periodic GC runs met their target"},
{&evrGCcnts.n, counters.CntMaxF | counters.CntMinF, nil, nil,
"gc_walked",
"how many entries did the last GC run walk"},
{&evrGCcnts.rmvd, counters.CntMaxF | counters.CntMinF, nil, nil,
"gc_removed",
"how many entries did the last GC run remove"},
{&evrGCcnts.to, 0, nil, nil, "gc_timeout",
"how many periodic GC exited due to timeout"},
{&evrGCcnts.gcMticks, 0, nil, nil, "gc_missed_ticks",
"missed ticks, gc is taking too long"},
}
// create or reuse counter group "ev_rate_gc" with minimum 100 entries
// (to leave space for adding more counters, e.g. from other packages
// like calltr)
err := registerCounters("ev_rate_gc", nil, &evrGCstats,
evrGCcntDefs[:], 100, 10)
if err != nil {
return err
}
// init evr generic counters
evrCntDefs := [...]counters.Def{
{&evrCnts.no, 0, nil, nil, "total_events",
"total events seen/processed"},
{&evrCnts.blstType, 0, nil, nil, "blst_type",
"total events blacklisted based on type"},
{&evrCnts.blstRate, 0, nil, nil, "blst_rate",
"total events blacklisted based on event rate"},
{&evrCnts.blstSent, 0, nil, nil, "blst_sent",
"sent (generated) rate-blacklisted events"},
{&evrCnts.trackFail, 0, nil, nil, "tracking_fail",
"event rate tracking creation failed (exceeded max entries)"},
{&evrCnts.blstRec, 0, nil, nil, "blst_recovered",
"recovered, previously rate-blacklisted events"},
}
err = registerCounters("ev_rate", nil, &evrStats, evrCntDefs[:], 100, 10)
if err != nil {
return err
}
if EvRateBlst.IsInit() {
// handle re-init: destroy old and create new
EvRateBlst.Destroy()
}
var maxRates calltr.EvRateMaxes
// register per call event callback
calltr.RegisterCEvHandler(callEvHandler)
calltr.InitEvRateMaxes(&maxRates, &cfg.EvRblstMaxVals, &cfg.EvRblstIntvls)
// init the event rate blacklist: hash table buckets, max entries.
EvRateBlst.Init(65535, uint32(cfg.EvRblstMax), &maxRates)
// init the event ring
EventsRing.Init(cfg.EvBufferSz)
for _, t := range cfg.EvTblst {
if len(t) > 0 {
if evt, perr := parseEvType(t); perr == nil {
EventsRing.Ignore(evt)
} else {
return fmt.Errorf("invalid event type in even_type_blst: %q",
t)
}
}
}
// init pcap counters
if !pcapInit() {
return fmt.Errorf("failed to init pcap counters")
}
// pcap dumper init
if cfg.WpcapDumpOn {
PcapDumperCfg = PcapWriterCfg{
NWorkers: cfg.WpcapWorkers,
QueueLen: cfg.WpcapQueueLen,
}
// fix dir
if len(cfg.WpcapDir) > 0 && cfg.WpcapDir[len(cfg.WpcapDir)-1] != '/' {
PcapDumperCfg.Dir = cfg.WpcapDir + "/"
} else {
PcapDumperCfg.Dir = cfg.WpcapDir
}
PcapDumperCfg.Prefix = cfg.WpcapPrefix
// fix extension
PcapDumperCfg.Suffix = cfg.WpcapSuffix
if len(cfg.WpcapExt) > 0 {
if cfg.WpcapExt[0] != '.' {
PcapDumperCfg.Suffix += "." + cfg.WpcapExt
} else {
PcapDumperCfg.Suffix += cfg.WpcapExt
}
}
err = PcapDumperCfg.InitSubDirs(cfg.WpcapFlags, cfg.WpcapSubDirs)
if err != nil {
return err
}
if !pcapDumper.Init(PcapDumperCfg) {
return fmt.Errorf("failed to init pcap dumper")
}
}
return nil
}
// Run sipcallmon packet processing, based on the passed config.
// It runs in a loop and exits only if Stop() was called, all the
// packet processing ended (pcap reply, EOF and run_forever == false).
func Run(cfg *Config) error {
var err error
if RunningCfg == nil || cfg != RunningCfg {
if err = Init(cfg); err != nil {
return err
}
}
if cfg.IPFIXport != 0 {
acmeIPFIXsrv = &AcmeIPFIXcollector{}
err = acmeIPFIXsrv.Init(cfg.IPFIXaddr, cfg.IPFIXport,
AcmeIPFIXconnCfg{
TimeoutMin: cfg.IPFIXminTo,
TimeoutMax: cfg.IPFIXmaxTo,
IgnoreIngress: cfg.IPFIXignIn,
IgnoreEgress: cfg.IPFIXignOut,
})
if err != nil {
acmeIPFIXsrv = nil
return err
}
}
stopLock.Lock()
if atomic.LoadUint32(&stopProcessing) != 0 {
stopLock.Unlock()
return nil
}
waitgrp = &sync.WaitGroup{}
waitgrp.Add(1) // acount for Run()
stopCh = make(chan struct{})
if cfg.EvRgcInterval != 0 {
gcTicker = time.NewTicker(cfg.EvRgcInterval)
evRateBlstStartGC(gcTicker, stopCh)
}
StartTS = time.Now()
// start web sever
if cfg.HTTPport != 0 {
if err = HTTPServerRun(cfg.HTTPaddr, cfg.HTTPport, waitgrp); err != nil {
stopLock.Unlock()
DBG("starting web server error: %s\n", err)
waitgrp.Done()
Stop()
return fmt.Errorf("Run: starting web server error: %w", err)
}
}
if acmeIPFIXsrv != nil && acmeIPFIXsrv.IsInit() {
// TODO: add a channel for reporting back pkts no and ipfix runtime
// start IPFIX listener
DBG("ipfix start on port %d\n", cfg.IPFIXport)
err = acmeIPFIXsrv.Start(waitgrp, cfg)
if err != nil {
stopLock.Unlock()
DBG("starting IPFIX server error: %s\n", err)
Stop()
return fmt.Errorf("Run: starting IPFIX server error: %w", err)
}
}
// start pcap dumper
if cfg.WpcapDumpOn {
if !pcapDumper.Start() {
stopLock.Unlock()
waitgrp.Done()
Stop()
return fmt.Errorf("Run: failed to start pcap dumper")
}
}
stopLock.Unlock()
var runTime time.Duration
var pcapTime time.Duration
var pktsNo uint64
if len(cfg.PCAPs) > 0 {
/*
for i := 0; i < flag.NArg(); i++ {
processPCAP(flag.Arg(i), &cfg)
}
*/
loops := cfg.PCAPloop
if loops == 0 {
loops = 1
}
for i := 0; i < int(loops); i++ {
for _, fn := range strings.Split(cfg.PCAPs, " ") {
var lastErr error
var runT, pcapT time.Duration
var n uint64
if len(fn) == 0 {
continue
}
n, runT, pcapT, lastErr = processPCAP(fn, cfg)
if err == nil {
// remember 1st error
err = lastErr
}
pktsNo += n
runTime += runT
pcapTime += pcapT
}
}
} else if len(cfg.BPF) > 0 {
//processLive(cfg.Iface, strings.Join(flag.Args(), " "), &cfg)
pktsNo, runTime, pcapTime, err = processLive(cfg.Iface, cfg.BPF, cfg)
}
StopTS = time.Now()
// print stats
//totalTime := StopTS.Sub(StartTS)
fmt.Fprintf(os.Stdout, "run time: %s\n", runTime)
if runTime != 0 {
pktRate :=
float64(pktsNo) / float64(uint64(runTime/time.Millisecond)) * 1000
tsize := stats.Get(sCnts.tsize)
speedMB :=
((float64(tsize) /
float64(uint64(runTime/time.Millisecond))) *
1000) / (1024 * 1024)
fmt.Fprintf(os.Stdout, " pkts/s: %.1f\n", pktRate)
fmt.Fprintf(os.Stdout, " MB/s: %.3f (%.3f Gbits/s)\n",
speedMB, speedMB*8/1024)
}
if len(cfg.PCAPs) > 0 && pcapTime != 0 {
fmt.Fprintf(os.Stdout, "pcap time: %s\n", pcapTime)
if runTime != 0 {
speedup := float64(uint64(pcapTime)) / float64(uint64(runTime))
fmt.Fprintf(os.Stdout, "pcap replay speed: %3.03f\n", speedup)
if speedup < 1.01 && speedup > 0.8 {
fmt.Fprintf(os.Stdout, "pcap replay slower: %s\n",
pcapTime-runTime)
}
}
if pcapTime != 0 {
pktRate :=
float64(pktsNo) / float64(uint64(pcapTime/time.Millisecond)) *
1000
tsize := stats.Get(sCnts.tsize)
speedMB := ((float64(tsize) /
float64(uint64(pcapTime/time.Millisecond))) *
1000) / (1024 * 1024)
fmt.Fprintf(os.Stdout, "pcap pkts/s: %.1f\n", pktRate)
fmt.Fprintf(os.Stdout, "pcap MB/s: %.3f (%.3f Gbits/s)\n",
speedMB, speedMB*8/1024)
}
} else if acmeIPFIXsrv != nil {
// IPFIX only mode
acmeIPFIXsrv.Wait()
}
printStats(os.Stdout, stats, &sCnts)
// print the counters
flags := counters.PrFullName | counters.PrVal | counters.PrRec |
counters.PrHideZero
//flags |= counters.PrDesc
printCounters(cfg, flags)
endWaitTo := cfg.EndWait
sCallsGrp, sCallsActive, _ := counters.RootGrp.GetCounterDot("calls.active")
if sCallsGrp != nil && sCallsActive != counters.Invalid {
fmt.Fprintf(os.Stdout, "end active entries %d"+
", end_force_timeout %s, end_wait %s\n",
sCallsGrp.Get(sCallsActive), cfg.EndForceTimeout,
cfg.EndWait)
}
if cfg.EndForceTimeout != 0 {
calltr.ForceAllTimeout(cfg.EndForceTimeout)
if !cfg.RunForever && endWaitTo == 0 {
// set wait timeout if not set
endWaitTo = cfg.EndForceTimeout + 250*time.Millisecond
fmt.Fprintf(os.Stdout, "end_force_timeout set => adjusting"+
" end_wait to: %s\n", endWaitTo)
}
}
if err == nil && (atomic.LoadUint32(&stopProcessing) == 0) &&
stopCh != nil {
if cfg.RunForever {
<-stopCh
} else if endWaitTo != 0 {
waitTicker := time.NewTicker(endWaitTo)
select {
case <-stopCh:
break
case <-waitTicker.C:
break
}
waitTicker.Stop()
}
}
if sCallsGrp != nil && sCallsActive != counters.Invalid {
fmt.Fprintf(os.Stdout, "final wait active entries %d"+
", end_force_timeout %s, end_wait %s\n",
sCallsGrp.Get(sCallsActive), cfg.EndForceTimeout,
cfg.EndWait)
}
waitgrp.Done() // must be before Stop() since stop will Wait()
Stop() // block waiting for everything to stop
return err
}
func printCounters(cfg *Config, flags int) {
for _, g := range cfg.StatsGrps {
gname := g.Name
if gname == "all" || gname == "*" {
printCountersGrp(&counters.RootGrp, flags)
break
} else if gname == "none" || gname == "-" {
continue
}
grp, _ := counters.RootGrp.GetSubGroupDot(gname)
if grp != nil {
printCountersGrp(grp, flags)
fmt.Println()
}
}
}
func printCountersGrp(grp *counters.Group, flags int) {
grp.Print(os.Stdout, "", flags)
grp.PrintSubGroups(os.Stdout, flags)
}