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) 2016-2017 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         "io/ioutil"
  26         "log"
  27         "net"
  28         "os"
  29         "strconv"
  30         "strings"
  31
  32         "cypherpunks.ru/nncp"
  33 )
  34
  35 func usage() {
  36         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  37         fmt.Fprintln(os.Stderr, "nncp-call -- call TCP daemon\n")
  38         fmt.Fprintf(os.Stderr, "Usage: %s [options] NODE[:ADDR] [FORCEADDR]\n", os.Args[0])
  39         fmt.Fprintln(os.Stderr, "You must specify either [NODE:ADDR] or [NODE FORCEADDR]\n")
  40         fmt.Fprintln(os.Stderr, "Options:")
  41         flag.PrintDefaults()
  42 }
  43
  44 func main() {
  45         var (
  46                 cfgPath  = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  47                 niceRaw  = flag.Int("nice", 255, "Minimal required niceness")
  48                 rxOnly   = flag.Bool("rx", false, "Only receive packets")
  49                 txOnly   = flag.Bool("tx", false, "Only transfer packets")
  50                 debug    = flag.Bool("debug", false, "Enable debugging information")
  51                 version  = flag.Bool("version", false, "Print version information")
  52                 warranty = flag.Bool("warranty", false, "Print warranty information")
  53         )
  54         flag.Usage = usage
  55         flag.Parse()
  56         if *warranty {
  57                 fmt.Println(nncp.Warranty)
  58                 return
  59         }
  60         if *version {
  61                 fmt.Println(nncp.VersionGet())
  62                 return
  63         }
  64         if flag.NArg() < 1 {
  65                 usage()
  66                 os.Exit(1)
  67         }
  68         if *niceRaw < 1 || *niceRaw > 255 {
  69                 log.Fatalln("-nice must be between 1 and 255")
  70         }
  71         nice := uint8(*niceRaw)
  72         if *rxOnly && *txOnly {
  73                 log.Fatalln("-rx and -tx can not be set simultaneously")
  74         }
  75
  76         cfgRaw, err := ioutil.ReadFile(*cfgPath)
  77         if err != nil {
  78                 log.Fatalln("Can not read config:", err)
  79         }
  80         ctx, err := nncp.CfgParse(cfgRaw)
  81         if err != nil {
  82                 log.Fatalln("Can not parse config:", err)
  83         }
  84         ctx.Debug = *debug
  85
  86         splitted := strings.SplitN(flag.Arg(0), ":", 2)
  87         node, err := ctx.FindNode(splitted[0])
  88         if err != nil {
  89                 log.Fatalln("Invalid NODE specified:", err)
  90         }
  91         if len(splitted) == 1 && flag.NArg() != 2 {
  92                 usage()
  93                 os.Exit(1)
  94         }
  95         var dst string
  96         if len(splitted) == 2 {
  97                 var known bool
  98                 dst, known = ctx.Neigh[*node.Id].Addrs[splitted[1]]
  99                 if !known {
 100                         log.Fatalln("Unknown ADDR specified")
 101                 }
 102         } else {
 103                 dst = flag.Arg(1)
 104         }
 105
 106         conn, err := net.Dial("tcp", dst)
 107         if err != nil {
 108                 log.Fatalln("Can not connect:", err)
 109         }
 110         ctx.LogD("call", nncp.SDS{"addr": dst}, "connected")
 111         var xxOnly nncp.TRxTx
 112         if *rxOnly {
 113                 xxOnly = nncp.TRx
 114         } else if *txOnly {
 115                 xxOnly = nncp.TTx
 116         }
 117         state, err := ctx.StartI(conn, node.Id, nice, &xxOnly)
 118         if err == nil {
 119                 ctx.LogI("call-start", nncp.SDS{"node": state.NodeId}, "connected")
 120                 state.Wait()
 121                 ctx.LogI("call-finish", nncp.SDS{
 122                         "node":     state.NodeId,
 123                         "duration": strconv.FormatInt(int64(state.Duration.Seconds()), 10),
 124                         "rxbytes":  strconv.FormatInt(state.RxBytes, 10),
 125                         "txbytes":  strconv.FormatInt(state.TxBytes, 10),
 126                         "rxspeed":  strconv.FormatInt(state.RxSpeed, 10),
 127                         "txspeed":  strconv.FormatInt(state.TxSpeed, 10),
 128                 }, "")
 129         } else {
 130                 ctx.LogE("call-start", nncp.SDS{"node": state.NodeId, "err": err}, "")
 131                 conn.Close()
 132                 os.Exit(1)
 133         }
 134         conn.Close()
 135 }