src/cmd/nncp-file/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 // Send file via NNCP.
  19 package main
  20
  21 import (
  22         "flag"
  23         "fmt"
  24         "log"
  25         "os"
  26         "strings"
  27
  28         "go.cypherpunks.ru/nncp/v7"
  29 )
  30
  31 func usage() {
  32         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  33         fmt.Fprintf(os.Stderr, "nncp-file -- send file\n\n")
  34         fmt.Fprintf(os.Stderr, "Usage: %s [options] SRC NODE:[DST]\n", os.Args[0])
  35         fmt.Fprintf(os.Stderr, "       %s [options] SRC %s:AREA:[DST]\nOptions:\n",
  36                 os.Args[0], nncp.AreaDir)
  37         flag.PrintDefaults()
  38         fmt.Fprint(os.Stderr, `
  39 If SRC equals to -, then read data from stdin to temporary file.
  40
  41 -minsize/-chunked take NODE's freq.minsize/freq.chunked configuration
  42 options by default. You can forcefully turn them off by specifying 0 value.
  43 `)
  44 }
  45
  46 func main() {
  47         var (
  48                 cfgPath      = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  49                 niceRaw      = flag.String("nice", nncp.NicenessFmt(nncp.DefaultNiceFile), "Outbound packet niceness")
  50                 argMinSize   = flag.Int64("minsize", -1, "Minimal required resulting packet size, in KiB")
  51                 argChunkSize = flag.Int64("chunked", -1, "Split file on specified size chunks, in KiB")
  52                 viaOverride  = flag.String("via", "", "Override Via path to destination node")
  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         if flag.NArg() != 2 {
  74                 usage()
  75                 os.Exit(1)
  76         }
  77         nice, err := nncp.NicenessParse(*niceRaw)
  78         if err != nil {
  79                 log.Fatalln(err)
  80         }
  81
  82         ctx, err := nncp.CtxFromCmdline(
  83                 *cfgPath,
  84                 *spoolPath,
  85                 *logPath,
  86                 *quiet,
  87                 *showPrgrs,
  88                 *omitPrgrs,
  89                 *debug,
  90         )
  91         if err != nil {
  92                 log.Fatalln("Error during initialization:", err)
  93         }
  94         if ctx.Self == nil {
  95                 log.Fatalln("Config lacks private keys")
  96         }
  97
  98         splitted := strings.Split(flag.Arg(1), ":")
  99         if len(splitted) < 2 {
 100                 usage()
 101                 os.Exit(1)
 102         }
 103         var areaId *nncp.AreaId
 104         var node *nncp.Node
 105         if splitted[0] == nncp.AreaDir {
 106                 if len(splitted) < 3 {
 107                         usage()
 108                         os.Exit(1)
 109                 }
 110                 areaId = ctx.AreaName2Id[splitted[1]]
 111                 if areaId == nil {
 112                         log.Fatalln("Unknown area specified")
 113                 }
 114                 node = ctx.Neigh[*ctx.SelfId]
 115                 splitted = splitted[2:]
 116         } else {
 117                 node, err = ctx.FindNode(splitted[0])
 118                 if err != nil {
 119                         log.Fatalln("Invalid NODE specified:", err)
 120                 }
 121                 splitted = splitted[1:]
 122         }
 123
 124         nncp.ViaOverride(*viaOverride, ctx, node)
 125         ctx.Umask()
 126
 127         var minSize int64
 128         if *argMinSize < 0 {
 129                 minSize = node.FreqMinSize
 130         } else if *argMinSize > 0 {
 131                 minSize = *argMinSize * 1024
 132         }
 133
 134         var chunkSize int64
 135         if *argChunkSize < 0 {
 136                 chunkSize = node.FreqChunked
 137         } else if *argChunkSize > 0 {
 138                 chunkSize = *argChunkSize * 1024
 139         }
 140         if chunkSize == 0 {
 141                 chunkSize = nncp.MaxFileSize
 142         }
 143
 144         if err = ctx.TxFile(
 145                 node,
 146                 nice,
 147                 flag.Arg(0),
 148                 strings.Join(splitted, ":"),
 149                 chunkSize,
 150                 minSize,
 151                 nncp.MaxFileSize,
 152                 areaId,
 153         ); err != nil {
 154                 log.Fatalln(err)
 155         }
 156 }