417 lines
8.7 KiB
Go
417 lines
8.7 KiB
Go
/*
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* Copyright 2026 Oleg Borodin <onborodin@gmail.com>
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*
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*
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*/
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package server
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import (
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"context"
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"fmt"
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"net"
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"os"
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"os/signal"
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"os/user"
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"path/filepath"
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"strconv"
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"sync"
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"syscall"
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"time"
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"mproxy/app/config"
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"mproxy/app/handler"
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"mproxy/app/logger"
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"mproxy/app/service"
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"mproxy/pkg/auxtool"
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"mproxy/app/proxoper"
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"mproxy/app/servoper"
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)
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type Server struct {
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conf *config.Config
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seop *servoper.Operator
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prop *proxoper.Operator
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svc *service.Service
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hand *handler.Handler
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logg *logger.Logger
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ctx context.Context
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cancel context.CancelFunc
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wg sync.WaitGroup
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logf *os.File
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//x509cert []byte
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//x509key []byte
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listen net.Listener
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}
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func NewServer() (*Server, error) {
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var err error
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srv := &Server{}
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srv.logg = logger.NewLoggerWithSubject("server")
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srv.ctx, srv.cancel = context.WithCancel(context.Background())
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return srv, err
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}
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func (srv *Server) Handler() *handler.Handler {
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return srv.hand
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}
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func (srv *Server) Service() *service.Service {
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return srv.svc
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}
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func (srv *Server) SetLogdir(dir string) {
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srv.conf.Logpath = dir
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}
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func (srv *Server) SetRundir(dir string) {
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srv.conf.Runpath = dir
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}
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func (srv *Server) SetDatadir(dir string) {
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srv.conf.Datadir = dir
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}
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func (srv *Server) SetPort(port uint32) {
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srv.conf.Service.Port = port
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}
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func (srv *Server) SetAsDaemon(asDaemon bool) {
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srv.conf.AsDaemon = asDaemon
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}
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func (srv *Server) Configure() error {
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var err error
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//srv.logg.Infof("Configuration server")
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srv.conf = config.NewConfig()
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if err != nil {
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return err
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}
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err = srv.conf.ReadConfigfile()
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if err != nil {
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srv.logg.Warningf("Error loading config file: %v", err)
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err = nil
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}
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err = srv.conf.ReadX509Cert()
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if err != nil {
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return err
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}
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return err
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}
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func (srv *Server) Build() error {
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var err error
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//srv.logg.Infof("Server building")
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currUser, err := user.Current()
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if err != nil {
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err = fmt.Errorf("Error getting current user: %v\n", err)
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return err
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}
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cuid64, err := strconv.ParseInt(currUser.Uid, 10, 64)
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if err != nil {
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return err
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}
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cgid64, err := strconv.ParseInt(currUser.Gid, 10, 64)
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if err != nil {
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return err
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}
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euid := int(cuid64)
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egid := int(cgid64)
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if cuid64 == 0 {
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usr, err := user.Lookup(srv.conf.RunUser)
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if err != nil {
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return err
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}
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uid64, err := strconv.ParseInt(usr.Uid, 10, 64)
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if err != nil {
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return err
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}
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gid64, err := strconv.ParseInt(usr.Gid, 10, 64)
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if err != nil {
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return err
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}
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euid = int(uid64)
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egid = int(gid64)
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}
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// Creating datadir
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datadir := srv.conf.Datadir
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if !auxtool.DirExists(datadir) { // TODO: check access to dir
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//srv.logg.Infof("Creating data directory %s ", datadir)
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err = os.MkdirAll(datadir, 0750)
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if err != nil {
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return err
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}
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}
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err = os.Chown(datadir, euid, egid)
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if err != nil {
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return err
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}
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if srv.conf.AsDaemon {
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logdir := filepath.Dir(srv.conf.Logpath)
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//srv.logg.Infof("Creating log directory %s", logdir)
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err = os.MkdirAll(logdir, 0750)
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if err != nil {
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return err
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}
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err = os.Chown(logdir, euid, egid)
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if err != nil {
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return err
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}
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rundir := filepath.Dir(srv.conf.Runpath)
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//srv.logg.Infof("Creating run directory %s", rundir)
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err = os.MkdirAll(rundir, 0750)
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if err != nil {
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return err
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}
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err = os.Chown(rundir, euid, egid)
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if err != nil {
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return err
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}
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// Redirect stderr and stout
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logFile, err := os.OpenFile(srv.conf.Logpath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0640)
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if err != nil {
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return err
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}
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err = syscall.Dup2(int(logFile.Fd()), int(os.Stdout.Fd()))
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if err != nil {
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return err
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}
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err = syscall.Dup2(int(logFile.Fd()), int(os.Stderr.Fd()))
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if err != nil {
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return err
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}
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srv.logf = logFile
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}
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confDump := srv.conf.String()
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srv.logg.Infof("Current server configuration is:\n%s\n", confDump)
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if cuid64 == 0 {
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// Change effective user and group
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err = syscall.Setgid(egid)
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if err != nil {
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return err
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}
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err = syscall.Setuid(euid)
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if err != nil {
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return err
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}
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}
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//return fmt.Errorf("Debug break")
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uidstr := strconv.FormatInt(int64(syscall.Geteuid()), 10)
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usr, err := user.LookupId(uidstr)
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if err != nil {
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return err
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}
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srv.logg.Warningf("Now run as user: %s", usr.Username)
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// Creating service operator
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srv.logg.Infof("Creating operator")
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servoperParams := &servoper.OperatorParams{}
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srv.seop, err = servoper.NewOperator(servoperParams)
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if err != nil {
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return err
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}
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// Creating proxy operator
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srv.logg.Infof("Creating operator")
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proxoperParams := &proxoper.OperatorParams{}
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srv.prop, err = proxoper.NewOperator(proxoperParams)
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if err != nil {
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return err
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}
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// Creating handler
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srv.logg.Infof("Creating handler")
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handlerParams := &handler.HandlerParams{
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ServOper: srv.seop,
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ProxOper: srv.prop,
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}
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srv.hand, err = handler.NewHandler(handlerParams)
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if err != nil {
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return err
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}
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// Creating service
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serviceParams := &service.ServiceParams{
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Handler: srv.hand,
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X509cert: srv.conf.X509Cert,
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X509key: srv.conf.X509Key,
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Address: srv.conf.Service.Address,
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Portnum: srv.conf.Service.Port,
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}
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srv.logg.Infof("Creating service")
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srv.svc, err = service.NewService(serviceParams)
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if err != nil {
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return err
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}
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// Building service
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err = srv.svc.Build()
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if err != nil {
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return err
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}
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return err
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}
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func (srv *Server) Run() error {
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var err error
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if srv.conf.AsDaemon {
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// Redirect stdin
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nullFile, err := os.OpenFile("/dev/null", os.O_RDWR, 0)
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if err != nil {
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return err
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}
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err = syscall.Dup2(int(nullFile.Fd()), int(os.Stdin.Fd()))
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if err != nil {
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return err
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}
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// Write process ID
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pidFile, err := os.OpenFile(srv.conf.Runpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0640)
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if err != nil {
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return err
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}
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defer pidFile.Close()
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currPid := os.Getpid()
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_, err = pidFile.WriteString(strconv.Itoa(currPid))
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if err != nil {
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return err
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}
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// Start log rotator
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srv.Rotator()
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}
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currUser, err := user.Current()
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if err != nil {
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return err
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}
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srv.logg.Infof("Server started with user: %s", currUser.Username)
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uidstr := strconv.FormatInt(int64(syscall.Geteuid()), 10)
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usr, err := user.LookupId(uidstr)
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if err != nil {
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return err
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}
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srv.logg.Infof("Server run with user: %s", usr.Username)
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svcDone := make(chan error, 1)
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// Service run
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srv.logg.Infof("Start service")
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startService := func(svc *service.Service, done chan error) {
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err = svc.Run()
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if err != nil {
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srv.logg.Errorf("Service error: %v", err)
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done <- err
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}
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}
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go startService(srv.svc, svcDone)
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sigs := make(chan os.Signal, 1)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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var signal os.Signal
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select {
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case signal = <-sigs:
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srv.logg.Infof("Services stopped by signal: %v", signal)
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srv.cancel()
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srv.svc.Stop()
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srv.wg.Wait()
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case err = <-svcDone:
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srv.logg.Infof("Service stopped by service error: %v", err)
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srv.cancel()
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srv.svc.Stop()
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srv.wg.Wait()
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}
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return err
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}
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func (srv *Server) PseudoFork() error {
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const successExit int = 0
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var keyEnv string = "IMX0LTSELMRF8K"
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var err error
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_, isChild := os.LookupEnv(keyEnv)
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switch {
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case !isChild:
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os.Setenv(keyEnv, "TRUE")
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procAttr := syscall.ProcAttr{}
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cwd, err := os.Getwd()
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if err != nil {
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return err
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}
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var sysFiles = make([]uintptr, 3)
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sysFiles[0] = uintptr(syscall.Stdin)
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sysFiles[1] = uintptr(syscall.Stdout)
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sysFiles[2] = uintptr(syscall.Stderr)
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procAttr.Files = sysFiles
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procAttr.Env = os.Environ()
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procAttr.Dir = cwd
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_, err = syscall.ForkExec(os.Args[0], os.Args, &procAttr)
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if err != nil {
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return err
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}
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os.Exit(successExit)
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case isChild:
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_, err = syscall.Setsid()
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if err != nil {
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return err
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}
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}
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os.Unsetenv(keyEnv)
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return err
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}
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func (srv *Server) Daemonize() error {
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var err error
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if srv.conf.AsDaemon {
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// Restart process process
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err = srv.PseudoFork()
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if err != nil {
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return err
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}
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}
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return err
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}
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func (srv *Server) Rotator() {
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srv.wg.Add(1)
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var counter uint64
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logFunc := func() {
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for {
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counter += 1
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select {
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case <-srv.ctx.Done():
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srv.wg.Done()
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srv.logg.Infof("Log file rotator done")
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return
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default:
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}
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if (counter % 60) == 1 {
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stat, err := srv.logf.Stat()
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if err == nil && stat.Size() > srv.conf.LogLimit {
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srv.logg.Infof("Rotate log file")
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countFiles := 3
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for i := 1; i < countFiles; i++ {
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nextName := fmt.Sprintf("%s.%d", srv.conf.Logpath, i+1)
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prevName := fmt.Sprintf("%s.%d", srv.conf.Logpath, i)
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os.Rename(prevName, nextName)
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}
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os.Rename(srv.conf.Logpath, srv.conf.Logpath+".1")
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logFile, err := os.OpenFile(srv.conf.Logpath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0640)
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if err == nil {
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syscall.Dup2(int(logFile.Fd()), int(os.Stdout.Fd()))
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syscall.Dup2(int(logFile.Fd()), int(os.Stderr.Fd()))
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srv.logf.Close()
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srv.logf = logFile
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}
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}
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}
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time.Sleep(1 * time.Second)
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}
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}
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go logFunc()
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}
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