src/cmd/nncp-call/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 // Call NNCP TCP daemon.
  19 package main
  20
  21 import (
  22         "flag"
  23         "fmt"
  24         "log"
  25         "os"
  26         "strings"
  27         "time"
  28
  29         "go.cypherpunks.ru/nncp/v6"
  30 )
  31
  32 func usage() {
  33         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  34         fmt.Fprintf(os.Stderr, "nncp-call -- call TCP daemon\n\n")
  35         fmt.Fprintf(os.Stderr, "Usage: %s [options] NODE[:ADDR] [FORCEADDR]\n", os.Args[0])
  36         fmt.Fprintln(os.Stderr, "Options:")
  37         flag.PrintDefaults()
  38 }
  39
  40 func main() {
  41         var (
  42                 cfgPath     = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  43                 niceRaw     = flag.String("nice", nncp.NicenessFmt(255), "Minimal required niceness")
  44                 rxOnly      = flag.Bool("rx", false, "Only receive packets")
  45                 txOnly      = flag.Bool("tx", false, "Only transmit packets")
  46                 listOnly    = flag.Bool("list", false, "Only list remote packets")
  47                 noCK        = flag.Bool("nock", false, "Do no checksum checking")
  48                 onlyPktsRaw = flag.String("pkts", "", "Recieve only that packets, comma separated")
  49                 rxRate      = flag.Int("rxrate", 0, "Maximal receive rate, pkts/sec")
  50                 txRate      = flag.Int("txrate", 0, "Maximal transmit rate, pkts/sec")
  51                 spoolPath   = flag.String("spool", "", "Override path to spool")
  52                 logPath     = flag.String("log", "", "Override path to logfile")
  53                 quiet       = flag.Bool("quiet", false, "Print only errors")
  54                 showPrgrs   = flag.Bool("progress", false, "Force progress showing")
  55                 omitPrgrs   = flag.Bool("noprogress", false, "Omit progress showing")
  56                 debug       = flag.Bool("debug", false, "Print debug messages")
  57                 version     = flag.Bool("version", false, "Print version information")
  58                 warranty    = flag.Bool("warranty", false, "Print warranty information")
  59
  60                 onlineDeadlineSec = flag.Uint("onlinedeadline", 0, "Override onlinedeadline option")
  61                 maxOnlineTimeSec  = flag.Uint("maxonlinetime", 0, "Override maxonlinetime option")
  62
  63                 autoToss       = flag.Bool("autotoss", false, "Toss after call is finished")
  64                 autoTossDoSeen = flag.Bool("autotoss-seen", false, "Create .seen files during tossing")
  65                 autoTossNoFile = flag.Bool("autotoss-nofile", false, "Do not process \"file\" packets during tossing")
  66                 autoTossNoFreq = flag.Bool("autotoss-nofreq", false, "Do not process \"freq\" packets during tossing")
  67                 autoTossNoExec = flag.Bool("autotoss-noexec", false, "Do not process \"exec\" packets during tossing")
  68                 autoTossNoTrns = flag.Bool("autotoss-notrns", false, "Do not process \"trns\" packets during tossing")
  69         )
  70         flag.Usage = usage
  71         flag.Parse()
  72         if *warranty {
  73                 fmt.Println(nncp.Warranty)
  74                 return
  75         }
  76         if *version {
  77                 fmt.Println(nncp.VersionGet())
  78                 return
  79         }
  80         if flag.NArg() < 1 {
  81                 usage()
  82                 os.Exit(1)
  83         }
  84         nice, err := nncp.NicenessParse(*niceRaw)
  85         if err != nil {
  86                 log.Fatalln(err)
  87         }
  88         if *rxOnly && *txOnly {
  89                 log.Fatalln("-rx and -tx can not be set simultaneously")
  90         }
  91
  92         ctx, err := nncp.CtxFromCmdline(
  93                 *cfgPath,
  94                 *spoolPath,
  95                 *logPath,
  96                 *quiet,
  97                 *showPrgrs,
  98                 *omitPrgrs,
  99                 *debug,
 100         )
 101         if err != nil {
 102                 log.Fatalln("Error during initialization:", err)
 103         }
 104         if ctx.Self == nil {
 105                 log.Fatalln("Config lacks private keys")
 106         }
 107
 108         splitted := strings.SplitN(flag.Arg(0), ":", 2)
 109         node, err := ctx.FindNode(splitted[0])
 110         if err != nil {
 111                 log.Fatalln("Invalid NODE specified:", err)
 112         }
 113         if node.NoisePub == nil {
 114                 log.Fatalln("Node does not have online communication capability")
 115         }
 116
 117         onlineDeadline := node.OnlineDeadline
 118         if *onlineDeadlineSec != 0 {
 119                 onlineDeadline = time.Duration(*onlineDeadlineSec) * time.Second
 120         }
 121         maxOnlineTime := node.MaxOnlineTime
 122         if *maxOnlineTimeSec != 0 {
 123                 maxOnlineTime = time.Duration(*maxOnlineTimeSec) * time.Second
 124         }
 125
 126         var xxOnly nncp.TRxTx
 127         if *rxOnly {
 128                 xxOnly = nncp.TRx
 129         } else if *txOnly {
 130                 xxOnly = nncp.TTx
 131         }
 132
 133         var addrs []string
 134         if flag.NArg() == 2 {
 135                 addrs = append(addrs, flag.Arg(1))
 136         } else if len(splitted) == 2 {
 137                 addr, known := ctx.Neigh[*node.Id].Addrs[splitted[1]]
 138                 if !known {
 139                         log.Fatalln("Unknown ADDR specified")
 140                 }
 141                 addrs = append(addrs, addr)
 142         } else {
 143                 for _, addr := range ctx.Neigh[*node.Id].Addrs {
 144                         addrs = append(addrs, addr)
 145                 }
 146         }
 147
 148         var onlyPkts map[[32]byte]bool
 149         if len(*onlyPktsRaw) > 0 {
 150                 splitted = strings.Split(*onlyPktsRaw, ",")
 151                 onlyPkts = make(map[[32]byte]bool, len(splitted))
 152                 for _, pktIdRaw := range splitted {
 153                         pktId, err := nncp.Base32Codec.DecodeString(pktIdRaw)
 154                         if err != nil {
 155                                 log.Fatalln("Invalid packet specified: ", err)
 156                         }
 157                         pktIdArr := new([32]byte)
 158                         copy(pktIdArr[:], pktId)
 159                         onlyPkts[*pktIdArr] = true
 160                 }
 161         }
 162
 163         ctx.Umask()
 164
 165         var autoTossFinish chan struct{}
 166         var autoTossBadCode chan bool
 167         if *autoToss {
 168                 autoTossFinish, autoTossBadCode = ctx.AutoToss(
 169                         node.Id,
 170                         nice,
 171                         *autoTossDoSeen,
 172                         *autoTossNoFile,
 173                         *autoTossNoFreq,
 174                         *autoTossNoExec,
 175                         *autoTossNoTrns,
 176                 )
 177         }
 178
 179         badCode := !ctx.CallNode(
 180                 node,
 181                 addrs,
 182                 nice,
 183                 xxOnly,
 184                 *rxRate,
 185                 *txRate,
 186                 onlineDeadline,
 187                 maxOnlineTime,
 188                 *listOnly,
 189                 *noCK,
 190                 onlyPkts,
 191         )
 192
 193         if *autoToss {
 194                 close(autoTossFinish)
 195                 badCode = (<-autoTossBadCode) || badCode
 196         }
 197         if badCode {
 198                 os.Exit(1)
 199         }
 200 }