src/cmd/nncp-call/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2019 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
  28         "go.cypherpunks.ru/nncp/v5"
  29 )
  30
  31 func usage() {
  32         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  33         fmt.Fprintf(os.Stderr, "nncp-call -- call TCP daemon\n\n")
  34         fmt.Fprintf(os.Stderr, "Usage: %s [options] NODE[:ADDR] [FORCEADDR]\n", os.Args[0])
  35         fmt.Fprintln(os.Stderr, "Options:")
  36         flag.PrintDefaults()
  37 }
  38
  39 func main() {
  40         var (
  41                 cfgPath     = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  42                 niceRaw     = flag.String("nice", nncp.NicenessFmt(255), "Minimal required niceness")
  43                 rxOnly      = flag.Bool("rx", false, "Only receive packets")
  44                 txOnly      = flag.Bool("tx", false, "Only transmit packets")
  45                 listOnly    = flag.Bool("list", false, "Only list remote packets")
  46                 onlyPktsRaw = flag.String("pkts", "", "Recieve only that packets, comma separated")
  47                 rxRate      = flag.Int("rxrate", 0, "Maximal receive rate, pkts/sec")
  48                 txRate      = flag.Int("txrate", 0, "Maximal transmit rate, pkts/sec")
  49                 spoolPath   = flag.String("spool", "", "Override path to spool")
  50                 logPath     = flag.String("log", "", "Override path to logfile")
  51                 quiet       = flag.Bool("quiet", false, "Print only errors")
  52                 debug       = flag.Bool("debug", false, "Print debug messages")
  53                 version     = flag.Bool("version", false, "Print version information")
  54                 warranty    = flag.Bool("warranty", false, "Print warranty information")
  55
  56                 onlineDeadline = flag.Uint("onlinedeadline", 0, "Override onlinedeadline option")
  57                 maxOnlineTime  = flag.Uint("maxonlinetime", 0, "Override maxonlinetime option")
  58         )
  59         flag.Usage = usage
  60         flag.Parse()
  61         if *warranty {
  62                 fmt.Println(nncp.Warranty)
  63                 return
  64         }
  65         if *version {
  66                 fmt.Println(nncp.VersionGet())
  67                 return
  68         }
  69         if flag.NArg() < 1 {
  70                 usage()
  71                 os.Exit(1)
  72         }
  73         nice, err := nncp.NicenessParse(*niceRaw)
  74         if err != nil {
  75                 log.Fatalln(err)
  76         }
  77         if *rxOnly && *txOnly {
  78                 log.Fatalln("-rx and -tx can not be set simultaneously")
  79         }
  80
  81         ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, *logPath, *quiet, *debug)
  82         if err != nil {
  83                 log.Fatalln("Error during initialization:", err)
  84         }
  85         if ctx.Self == nil {
  86                 log.Fatalln("Config lacks private keys")
  87         }
  88
  89         splitted := strings.SplitN(flag.Arg(0), ":", 2)
  90         node, err := ctx.FindNode(splitted[0])
  91         if err != nil {
  92                 log.Fatalln("Invalid NODE specified:", err)
  93         }
  94         if node.NoisePub == nil {
  95                 log.Fatalln("Node does not have online communication capability")
  96         }
  97
  98         if *onlineDeadline == 0 {
  99                 onlineDeadline = &node.OnlineDeadline
 100         }
 101         if *maxOnlineTime == 0 {
 102                 maxOnlineTime = &node.MaxOnlineTime
 103         }
 104
 105         var xxOnly nncp.TRxTx
 106         if *rxOnly {
 107                 xxOnly = nncp.TRx
 108         } else if *txOnly {
 109                 xxOnly = nncp.TTx
 110         }
 111
 112         var addrs []string
 113         if flag.NArg() == 2 {
 114                 addrs = append(addrs, flag.Arg(1))
 115         } else if len(splitted) == 2 {
 116                 addr, known := ctx.Neigh[*node.Id].Addrs[splitted[1]]
 117                 if !known {
 118                         log.Fatalln("Unknown ADDR specified")
 119                 }
 120                 addrs = append(addrs, addr)
 121         } else {
 122                 for _, addr := range ctx.Neigh[*node.Id].Addrs {
 123                         addrs = append(addrs, addr)
 124                 }
 125         }
 126
 127         var onlyPkts map[[32]byte]bool
 128         if len(*onlyPktsRaw) > 0 {
 129                 splitted = strings.Split(*onlyPktsRaw, ",")
 130                 onlyPkts = make(map[[32]byte]bool, len(splitted))
 131                 for _, pktIdRaw := range splitted {
 132                         pktId, err := nncp.FromBase32(pktIdRaw)
 133                         if err != nil {
 134                                 log.Fatalln("Invalid packet specified: ", err)
 135                         }
 136                         pktIdArr := new([32]byte)
 137                         copy(pktIdArr[:], pktId)
 138                         onlyPkts[*pktIdArr] = true
 139                 }
 140         }
 141
 142         ctx.Umask()
 143         if !ctx.CallNode(
 144                 node,
 145                 addrs,
 146                 nice,
 147                 xxOnly,
 148                 *rxRate,
 149                 *txRate,
 150                 *onlineDeadline,
 151                 *maxOnlineTime,
 152                 *listOnly,
 153                 onlyPkts,
 154         ) {
 155                 os.Exit(1)
 156         }
 157 }