src/cypherpunks.ru/nncp/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, either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 // Call NNCP TCP daemon.
  20 package main
  21
  22 import (
  23         "flag"
  24         "fmt"
  25         "log"
  26         "os"
  27         "strings"
  28
  29         "cypherpunks.ru/nncp"
  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                 onlyPktsRaw = flag.String("pkts", "", "Recieve only that packets, comma separated")
  48                 rxRate      = flag.Int("rxrate", 0, "Maximal receive rate, pkts/sec")
  49                 txRate      = flag.Int("txrate", 0, "Maximal transmit rate, pkts/sec")
  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                 debug       = flag.Bool("debug", false, "Print debug messages")
  54                 version     = flag.Bool("version", false, "Print version information")
  55                 warranty    = flag.Bool("warranty", false, "Print warranty information")
  56
  57                 onlineDeadline = flag.Uint("onlinedeadline", 0, "Override onlinedeadline option")
  58                 maxOnlineTime  = flag.Uint("maxonlinetime", 0, "Override maxonlinetime option")
  59         )
  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         if flag.NArg() < 1 {
  71                 usage()
  72                 os.Exit(1)
  73         }
  74         nice, err := nncp.NicenessParse(*niceRaw)
  75         if err != nil {
  76                 log.Fatalln(err)
  77         }
  78         if *rxOnly && *txOnly {
  79                 log.Fatalln("-rx and -tx can not be set simultaneously")
  80         }
  81
  82         ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, *logPath, *quiet, *debug)
  83         if err != nil {
  84                 log.Fatalln("Error during initialization:", err)
  85         }
  86         if ctx.Self == nil {
  87                 log.Fatalln("Config lacks private keys")
  88         }
  89
  90         splitted := strings.SplitN(flag.Arg(0), ":", 2)
  91         node, err := ctx.FindNode(splitted[0])
  92         if err != nil {
  93                 log.Fatalln("Invalid NODE specified:", err)
  94         }
  95         if node.NoisePub == nil {
  96                 log.Fatalln("Node does not have online communication capability")
  97         }
  98
  99         if *onlineDeadline == 0 {
 100                 onlineDeadline = &node.OnlineDeadline
 101         }
 102         if *maxOnlineTime == 0 {
 103                 maxOnlineTime = &node.MaxOnlineTime
 104         }
 105
 106         var xxOnly nncp.TRxTx
 107         if *rxOnly {
 108                 xxOnly = nncp.TRx
 109         } else if *txOnly {
 110                 xxOnly = nncp.TTx
 111         }
 112
 113         var addrs []string
 114         if flag.NArg() == 2 {
 115                 addrs = append(addrs, flag.Arg(1))
 116         } else if len(splitted) == 2 {
 117                 addr, known := ctx.Neigh[*node.Id].Addrs[splitted[1]]
 118                 if !known {
 119                         log.Fatalln("Unknown ADDR specified")
 120                 }
 121                 addrs = append(addrs, addr)
 122         } else {
 123                 for _, addr := range ctx.Neigh[*node.Id].Addrs {
 124                         addrs = append(addrs, addr)
 125                 }
 126         }
 127
 128         var onlyPkts map[[32]byte]bool
 129         if len(*onlyPktsRaw) > 0 {
 130                 splitted = strings.Split(*onlyPktsRaw, ",")
 131                 onlyPkts = make(map[[32]byte]bool, len(splitted))
 132                 for _, pktIdRaw := range splitted {
 133                         pktId, err := nncp.FromBase32(pktIdRaw)
 134                         if err != nil {
 135                                 log.Fatalln("Invalid packet specified: ", err)
 136                         }
 137                         pktIdArr := new([32]byte)
 138                         copy(pktIdArr[:], pktId)
 139                         onlyPkts[*pktIdArr] = true
 140                 }
 141         }
 142
 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 }