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port_lookup.go
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/
port_lookup.go
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package probe
// #include "../../defs.h"
import "C"
import (
"strings"
"time"
"github.com/zhyocean/neuvector/share"
"github.com/zhyocean/neuvector/share/global"
"github.com/zhyocean/neuvector/share/osutil"
"github.com/zhyocean/neuvector/share/utils"
)
const (
langBin = 1 << iota
langJava
langErlang
)
type appType struct {
id uint32
isApp bool
}
type javaAppType struct {
name string
id uint32
isApp bool
}
var binAppMap map[string]appType = map[string]appType{
"mysqld": {C.DPI_APP_MYSQL, true},
"redis-server": {C.DPI_APP_REDIS, true},
"mongod": {C.DPI_APP_MONGODB, true},
"postgres": {C.DPI_APP_POSTGRESQL, true},
"radiusd": {C.DPI_APP_RADIUS, true},
"consul": {C.DPI_APP_CONSUL, true},
"etcd": {C.DPI_APP_ETCD, true},
"node": {C.DPI_APP_NODEJS, false},
"nginx": {C.DPI_APP_NGINX, false},
"apache2": {C.DPI_APP_APACHE, false},
"saslauthd-port": {C.DPI_APP_COUCHBASE, true},
"memcached": {C.DPI_APP_COUCHBASE, true},
"godu": {C.DPI_APP_COUCHBASE, true},
"goxdcr": {C.DPI_APP_COUCHBASE, true},
"goport": {C.DPI_APP_COUCHBASE, true},
"indexer": {C.DPI_APP_COUCHBASE, true},
"moxi": {C.DPI_APP_COUCHBASE, true},
"cbq-engine": {C.DPI_APP_COUCHBASE, true},
"projector": {C.DPI_APP_COUCHBASE, true},
"couchdb": {C.DPI_APP_COUCHDB, true},
"couchjs": {C.DPI_APP_COUCHDB, true},
"tini": {C.DPI_APP_COUCHDB, true},
"gosu": {C.DPI_APP_COUCHDB, true},
"rabbitmq-server": {C.DPI_APP_RABBITMQ, true},
"rabbitmqctl": {C.DPI_APP_RABBITMQ, true},
"rabbitmq-plugins": {C.DPI_APP_RABBITMQ, true},
"rabbitmq-env": {C.DPI_APP_RABBITMQ, true},
"rabbitmq-defaults": {C.DPI_APP_RABBITMQ, true},
}
var javaAppMap []javaAppType = []javaAppType{
{"spark", C.DPI_APP_SPARK, true},
{"cassandra", C.DPI_APP_CASSANDRA, true},
{"voltdb", C.DPI_APP_VOLTDB, true},
{"kafka", C.DPI_APP_KAFKA, true},
{"activemq", C.DPI_APP_ACTIVEMQ, true},
{"Elasticsearch", C.DPI_APP_ELASTICSEARCH, false},
{"zookeeper", C.DPI_APP_ZOOKEEPER, true},
}
var erlangAppMap map[string]appType = map[string]appType{
"couchbase": {C.DPI_APP_COUCHBASE, true},
"couchdb": {C.DPI_APP_COUCHDB, true},
"rabbitmq": {C.DPI_APP_RABBITMQ, true},
}
type procApp struct {
Pids utils.Set
App share.CLUSApp
AddConfirmed bool
DelConfirmed bool
SessionInitTime time.Time
}
func getJavaClass(cmdline []string) []string {
var classes []string // all possible matches from the command line
bSkipNextToken := false
length := len(cmdline)
for i := 1; i < length; i++ {
//get the java main class, java [ options ] class [ arguments ]
//or java [ options ] -jar file.jar [ arguments ]
//exclude -cp class_path
// log.WithFields(log.Fields{"cmdline": cmdline[i], "i": i}).Debug()
if bSkipNextToken {
bSkipNextToken = false
continue
}
if strings.HasPrefix(cmdline[i], "--") { // escape parameter, it follows with a space, then a parameter
bSkipNextToken = true
continue
}
if strings.HasPrefix(cmdline[i], "%") { // like %p, part of previous parameter, ignored
continue
}
if !strings.HasPrefix(cmdline[i], "-") {
classes = append(classes, cmdline[i])
} else if (cmdline[i] == "-jar" || cmdline[i] == "-cp" || cmdline[i] == "-classpath") && ((i + 1) < length) {
classes = append(classes, cmdline[i+1])
bSkipNextToken = true
}
}
return classes
}
func lookupAppMap(cmdName string, cmdline []string) (uint32, bool) {
if len(cmdline) == 0 {
return 0, false
}
if cmdName == "java" {
if javaClasses := getJavaClass(cmdline); len(javaClasses) > 0 {
for _, class := range javaClasses {
// log.WithFields(log.Fields{"javaClass": class}).Debug()
for _, app := range javaAppMap {
if strings.Contains(class, app.name) {
return app.id, app.isApp
}
}
}
}
return 0, false
} else if cmdName == "beam.smp" || cmdName == "beam" {
//erlang daemon
for _, c := range cmdline {
for name, app := range erlangAppMap {
if len(c) > 1 && c[0] != '-' && strings.Contains(c, name) {
return app.id, app.isApp
}
}
}
return 0, false
} else if cmdName == "epmd" {
return C.DPI_APP_ERLANG_EPMD, false
}
//lookup the binary app map
if app, found := binAppMap[cmdName]; found {
return app.id, app.isApp
}
return 0, false
}
func getAppMap(portsMap map[osutil.SocketInfo]*procApp) {
var conServer uint32
var erlangPort osutil.SocketInfo
for port, papp := range portsMap {
if papp.Pids.Cardinality() == 0 {
continue
}
pid := papp.Pids.Any().(int)
ppid, _, _, _, cmdName := osutil.GetProcessPIDs(pid)
if ppid == -1 {
continue
}
cmds, err := global.SYS.ReadCmdLine(pid)
if err != nil {
continue
}
// log.WithFields(log.Fields{"pids": papp.Pids, "name": cmdName}).Debug()
if server, isApp := lookupAppMap(cmdName, cmds); server != 0 {
papp.App.CLUSProtoPort = share.CLUSProtoPort{IPProto: port.IPProto, Port: port.Port}
papp.App.Server = server
if isApp {
papp.App.Application = server
}
if server == C.DPI_APP_ERLANG_EPMD {
erlangPort = port
}
if server != C.DPI_APP_ERLANG_EPMD {
conServer = server
}
} else {
papp.App.CLUSProtoPort = share.CLUSProtoPort{IPProto: port.IPProto, Port: port.Port}
}
}
//the erlang port mapper is an independent program, like dns, it is used in couchbase/rabbitmq/couchdb, etc.
//we can not identify which application it belong to only in cmdline lookup,
//so we need to find out the application after the whole container identified
if erlangPort.Port != 0 {
if conServer != 0 {
// update epmd server since they have diffferent inodes but shared the same tcp/port
for port, papp := range portsMap {
if port.Port == erlangPort.Port && port.IPProto == erlangPort.IPProto {
papp.App.Server = conServer
papp.App.Application = conServer
}
}
} else {
for _, a := range portsMap {
if a.App.Server != 0 && a.App.Server != C.DPI_APP_ERLANG_EPMD {
portsMap[erlangPort].App.Server = a.App.Server
portsMap[erlangPort].App.Application = a.App.Server
break
}
}
}
}
}