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         log.SetFlags(log.Lshortfile)
  71         flag.Usage = usage
  72         flag.Parse()
  73         if *warranty {
  74                 fmt.Println(nncp.Warranty)
  75                 return
  76         }
  77         if *version {
  78                 fmt.Println(nncp.VersionGet())
  79                 return
  80         }
  81         if flag.NArg() < 1 {
  82                 usage()
  83                 os.Exit(1)
  84         }
  85         nice, err := nncp.NicenessParse(*niceRaw)
  86         if err != nil {
  87                 log.Fatalln(err)
  88         }
  89         if *rxOnly && *txOnly {
  90                 log.Fatalln("-rx and -tx can not be set simultaneously")
  91         }
  92
  93         ctx, err := nncp.CtxFromCmdline(
  94                 *cfgPath,
  95                 *spoolPath,
  96                 *logPath,
  97                 *quiet,
  98                 *showPrgrs,
  99                 *omitPrgrs,
 100                 *debug,
 101         )
 102         if err != nil {
 103                 log.Fatalln("Error during initialization:", err)
 104         }
 105         if ctx.Self == nil {
 106                 log.Fatalln("Config lacks private keys")
 107         }
 108
 109         splitted := strings.SplitN(flag.Arg(0), ":", 2)
 110         node, err := ctx.FindNode(splitted[0])
 111         if err != nil {
 112                 log.Fatalln("Invalid NODE specified:", err)
 113         }
 114         if node.NoisePub == nil {
 115                 log.Fatalln("Node does not have online communication capability")
 116         }
 117
 118         onlineDeadline := node.OnlineDeadline
 119         if *onlineDeadlineSec != 0 {
 120                 onlineDeadline = time.Duration(*onlineDeadlineSec) * time.Second
 121         }
 122         maxOnlineTime := node.MaxOnlineTime
 123         if *maxOnlineTimeSec != 0 {
 124                 maxOnlineTime = time.Duration(*maxOnlineTimeSec) * time.Second
 125         }
 126
 127         var xxOnly nncp.TRxTx
 128         if *rxOnly {
 129                 xxOnly = nncp.TRx
 130         } else if *txOnly {
 131                 xxOnly = nncp.TTx
 132         }
 133
 134         var addrs []string
 135         if flag.NArg() == 2 {
 136                 addrs = append(addrs, flag.Arg(1))
 137         } else if len(splitted) == 2 {
 138                 addr, known := ctx.Neigh[*node.Id].Addrs[splitted[1]]
 139                 if !known {
 140                         log.Fatalln("Unknown ADDR specified")
 141                 }
 142                 addrs = append(addrs, addr)
 143         } else {
 144                 for _, addr := range ctx.Neigh[*node.Id].Addrs {
 145                         addrs = append(addrs, addr)
 146                 }
 147         }
 148
 149         var onlyPkts map[[32]byte]bool
 150         if len(*onlyPktsRaw) > 0 {
 151                 splitted = strings.Split(*onlyPktsRaw, ",")
 152                 onlyPkts = make(map[[32]byte]bool, len(splitted))
 153                 for _, pktIdRaw := range splitted {
 154                         pktId, err := nncp.Base32Codec.DecodeString(pktIdRaw)
 155                         if err != nil {
 156                                 log.Fatalln("Invalid packet specified: ", err)
 157                         }
 158                         pktIdArr := new([32]byte)
 159                         copy(pktIdArr[:], pktId)
 160                         onlyPkts[*pktIdArr] = true
 161                 }
 162         }
 163
 164         ctx.Umask()
 165
 166         var autoTossFinish chan struct{}
 167         var autoTossBadCode chan bool
 168         if *autoToss {
 169                 autoTossFinish, autoTossBadCode = ctx.AutoToss(
 170                         node.Id,
 171                         nice,
 172                         *autoTossDoSeen,
 173                         *autoTossNoFile,
 174                         *autoTossNoFreq,
 175                         *autoTossNoExec,
 176                         *autoTossNoTrns,
 177                 )
 178         }
 179
 180         badCode := !ctx.CallNode(
 181                 node,
 182                 addrs,
 183                 nice,
 184                 xxOnly,
 185                 *rxRate,
 186                 *txRate,
 187                 onlineDeadline,
 188                 maxOnlineTime,
 189                 *listOnly,
 190                 *noCK,
 191                 onlyPkts,
 192         )
 193
 194         if *autoToss {
 195                 close(autoTossFinish)
 196                 badCode = (<-autoTossBadCode) || badCode
 197         }
 198         if badCode {
 199                 os.Exit(1)
 200         }
 201 }