src/cmd/nncp-toss/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2023 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         "path/filepath"
  27         "time"
  28
  29         "go.cypherpunks.ru/nncp/v8"
  30 )
  31
  32 func usage() {
  33         fmt.Fprint(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                 noArea    = flag.Bool("noarea", false, "Do not process \"area\" packets")
  51                 noACK     = flag.Bool("noack", false, "Do not process \"ack\" packets")
  52                 genACK    = flag.Bool("gen-ack", false, "Generate ACK packets")
  53                 spoolPath = flag.String("spool", "", "Override path to spool")
  54                 logPath   = flag.String("log", "", "Override path to logfile")
  55                 quiet     = flag.Bool("quiet", false, "Print only errors")
  56                 showPrgrs = flag.Bool("progress", false, "Force progress showing")
  57                 omitPrgrs = flag.Bool("noprogress", false, "Omit progress showing")
  58                 debug     = flag.Bool("debug", false, "Print debug messages")
  59                 version   = flag.Bool("version", false, "Print version information")
  60                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  61         )
  62         log.SetFlags(log.Lshortfile)
  63         flag.Usage = usage
  64         flag.Parse()
  65         if *warranty {
  66                 fmt.Println(nncp.Warranty)
  67                 return
  68         }
  69         if *version {
  70                 fmt.Println(nncp.VersionGet())
  71                 return
  72         }
  73         nice, err := nncp.NicenessParse(*niceRaw)
  74         if err != nil {
  75                 log.Fatalln(err)
  76         }
  77
  78         ctx, err := nncp.CtxFromCmdline(
  79                 *cfgPath,
  80                 *spoolPath,
  81                 *logPath,
  82                 *quiet,
  83                 *showPrgrs,
  84                 *omitPrgrs,
  85                 *debug,
  86         )
  87         if err != nil {
  88                 log.Fatalln("Error during initialization:", err)
  89         }
  90         if ctx.Self == nil {
  91                 log.Fatalln("Config lacks private keys")
  92         }
  93
  94         var nodeOnly *nncp.Node
  95         if *nodeRaw != "" {
  96                 nodeOnly, err = ctx.FindNode(*nodeRaw)
  97                 if err != nil {
  98                         log.Fatalln("Invalid -node specified:", err)
  99                 }
 100         }
 101
 102         ctx.Umask()
 103
 104         if *cycle == 0 {
 105                 isBad := false
 106                 for nodeId, node := range ctx.Neigh {
 107                         if nodeOnly != nil && nodeId != *nodeOnly.Id {
 108                                 continue
 109                         }
 110                         isBad = ctx.Toss(
 111                                 node.Id,
 112                                 nncp.TRx,
 113                                 &nncp.TossOpts{
 114                                         Nice:   nice,
 115                                         DoSeen: *doSeen,
 116                                         NoFile: *noFile,
 117                                         NoFreq: *noFreq,
 118                                         NoExec: *noExec,
 119                                         NoTrns: *noTrns,
 120                                         NoArea: *noArea,
 121                                         NoACK:  *noACK,
 122                                         GenACK: *genACK,
 123                                 },
 124                         ) || isBad
 125                         if nodeId == *ctx.SelfId {
 126                                 isBad = ctx.Toss(
 127                                         node.Id,
 128                                         nncp.TTx,
 129                                         &nncp.TossOpts{
 130                                                 Nice:   nice,
 131                                                 NoFile: true,
 132                                                 NoFreq: true,
 133                                                 NoExec: true,
 134                                                 NoTrns: true,
 135                                                 NoArea: *noArea,
 136                                                 NoACK:  *noACK,
 137                                         },
 138                                 ) || isBad
 139                         }
 140                 }
 141                 if isBad {
 142                         os.Exit(1)
 143                 }
 144                 return
 145         }
 146
 147         nodeIds := make(chan *nncp.NodeId)
 148         for nodeId, node := range ctx.Neigh {
 149                 if nodeOnly != nil && nodeId != *nodeOnly.Id {
 150                         continue
 151                 }
 152                 dw, err := ctx.NewDirWatcher(
 153                         filepath.Join(ctx.Spool, node.Id.String(), string(nncp.TRx)),
 154                         time.Second*time.Duration(*cycle),
 155                 )
 156                 if err != nil {
 157                         log.Fatalln(err)
 158                 }
 159                 go func(nodeId *nncp.NodeId) {
 160                         for range dw.C {
 161                                 nodeIds <- nodeId
 162                         }
 163                 }(node.Id)
 164         }
 165         for nodeId := range nodeIds {
 166                 ctx.Toss(
 167                         nodeId,
 168                         nncp.TRx,
 169                         &nncp.TossOpts{
 170                                 Nice:   nice,
 171                                 DryRun: *dryRun,
 172                                 DoSeen: *doSeen,
 173                                 NoFile: *noFile,
 174                                 NoFreq: *noFreq,
 175                                 NoExec: *noExec,
 176                                 NoTrns: *noTrns,
 177                                 NoArea: *noArea,
 178                                 NoACK:  *noACK,
 179                                 GenACK: *genACK,
 180                         },
 181                 )
 182                 if *nodeId == *ctx.SelfId {
 183                         ctx.Toss(
 184                                 nodeId,
 185                                 nncp.TTx,
 186                                 &nncp.TossOpts{
 187                                         Nice:   nice,
 188                                         NoFile: true,
 189                                         NoFreq: true,
 190                                         NoExec: true,
 191                                         NoTrns: true,
 192                                         NoArea: *noArea,
 193                                         NoACK:  *noACK,
 194                                 },
 195                         )
 196                 }
 197         }
 198 }