src/cmd/nncp-toss/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2021 Sergey Matveev <stargrave@stargrave.org>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, version 3 of the License.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 // Process inbound NNCP packets.
  19 package main
  20
  21 import (
  22         "flag"
  23         "fmt"
  24         "log"
  25         "os"
  26         "time"
  27
  28         "go.cypherpunks.ru/nncp/v6"
  29 )
  30
  31 func usage() {
  32         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  33         fmt.Fprintf(os.Stderr, "nncp-toss -- process inbound packets\n\n")
  34         fmt.Fprintf(os.Stderr, "Usage: %s [options]\nOptions:\n", os.Args[0])
  35         flag.PrintDefaults()
  36 }
  37
  38 func main() {
  39         var (
  40                 cfgPath   = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  41                 nodeRaw   = flag.String("node", "", "Process only that node")
  42                 niceRaw   = flag.String("nice", nncp.NicenessFmt(255), "Minimal required niceness")
  43                 dryRun    = flag.Bool("dryrun", false, "Do not actually write any tossed data")
  44                 doSeen    = flag.Bool("seen", false, "Create .seen files")
  45                 cycle     = flag.Uint("cycle", 0, "Repeat tossing after N seconds in infinite loop")
  46                 noFile    = flag.Bool("nofile", false, "Do not process \"file\" packets")
  47                 noFreq    = flag.Bool("nofreq", false, "Do not process \"freq\" packets")
  48                 noExec    = flag.Bool("noexec", false, "Do not process \"exec\" packets")
  49                 noTrns    = flag.Bool("notrns", false, "Do not process \"transitional\" packets")
  50                 spoolPath = flag.String("spool", "", "Override path to spool")
  51                 logPath   = flag.String("log", "", "Override path to logfile")
  52                 quiet     = flag.Bool("quiet", false, "Print only errors")
  53                 showPrgrs = flag.Bool("progress", false, "Force progress showing")
  54                 omitPrgrs = flag.Bool("noprogress", false, "Omit progress showing")
  55                 debug     = flag.Bool("debug", false, "Print debug messages")
  56                 version   = flag.Bool("version", false, "Print version information")
  57                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  58         )
  59         log.SetFlags(log.Lshortfile)
  60         flag.Usage = usage
  61         flag.Parse()
  62         if *warranty {
  63                 fmt.Println(nncp.Warranty)
  64                 return
  65         }
  66         if *version {
  67                 fmt.Println(nncp.VersionGet())
  68                 return
  69         }
  70         nice, err := nncp.NicenessParse(*niceRaw)
  71         if err != nil {
  72                 log.Fatalln(err)
  73         }
  74
  75         ctx, err := nncp.CtxFromCmdline(
  76                 *cfgPath,
  77                 *spoolPath,
  78                 *logPath,
  79                 *quiet,
  80                 *showPrgrs,
  81                 *omitPrgrs,
  82                 *debug,
  83         )
  84         if err != nil {
  85                 log.Fatalln("Error during initialization:", err)
  86         }
  87         if ctx.Self == nil {
  88                 log.Fatalln("Config lacks private keys")
  89         }
  90
  91         var nodeOnly *nncp.Node
  92         if *nodeRaw != "" {
  93                 nodeOnly, err = ctx.FindNode(*nodeRaw)
  94                 if err != nil {
  95                         log.Fatalln("Invalid -node specified:", err)
  96                 }
  97         }
  98
  99         ctx.Umask()
 100
 101 Cycle:
 102         isBad := false
 103         for nodeId, node := range ctx.Neigh {
 104                 if nodeOnly != nil && nodeId != *nodeOnly.Id {
 105                         continue
 106                 }
 107                 isBad = ctx.Toss(
 108                         node.Id,
 109                         nice,
 110                         *dryRun,
 111                         *doSeen,
 112                         *noFile,
 113                         *noFreq,
 114                         *noExec,
 115                         *noTrns,
 116                 )
 117         }
 118         if *cycle > 0 {
 119                 time.Sleep(time.Duration(*cycle) * time.Second)
 120                 goto Cycle
 121         }
 122         if isBad {
 123                 os.Exit(1)
 124         }
 125 }