src/cmd/nncp-call/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2022 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         "net"
  26         "os"
  27         "regexp"
  28         "strings"
  29         "time"
  30
  31         "go.cypherpunks.ru/nncp/v8"
  32 )
  33
  34 func usage() {
  35         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  36         fmt.Fprintf(os.Stderr, "nncp-call -- call TCP daemon\n\n")
  37         fmt.Fprintf(os.Stderr, "Usage: %s [options] NODE[:ADDR] [FORCEADDR]\n", os.Args[0])
  38         fmt.Fprintln(os.Stderr, "Options:")
  39         flag.PrintDefaults()
  40 }
  41
  42 func main() {
  43         var (
  44                 cfgPath     = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  45                 ucspi       = flag.Bool("ucspi", false, "Is it started as UCSPI-TCP client")
  46                 niceRaw     = flag.String("nice", nncp.NicenessFmt(255), "Minimal required niceness")
  47                 rxOnly      = flag.Bool("rx", false, "Only receive packets")
  48                 txOnly      = flag.Bool("tx", false, "Only transmit packets")
  49                 listOnly    = flag.Bool("list", false, "Only list remote packets")
  50                 noCK        = flag.Bool("nock", false, "Do no checksum checking")
  51                 onlyPktsRaw = flag.String("pkts", "", "Recieve only that packets, comma separated")
  52                 mcdWait     = flag.Uint("mcd-wait", 60, "Wait for MCD for specified number of seconds")
  53                 rxRate      = flag.Int("rxrate", 0, "Maximal receive rate, pkts/sec")
  54                 txRate      = flag.Int("txrate", 0, "Maximal transmit rate, pkts/sec")
  55                 spoolPath   = flag.String("spool", "", "Override path to spool")
  56                 logPath     = flag.String("log", "", "Override path to logfile")
  57                 quiet       = flag.Bool("quiet", false, "Print only errors")
  58                 showPrgrs   = flag.Bool("progress", false, "Force progress showing")
  59                 omitPrgrs   = flag.Bool("noprogress", false, "Omit progress showing")
  60                 debug       = flag.Bool("debug", false, "Print debug messages")
  61                 version     = flag.Bool("version", false, "Print version information")
  62                 warranty    = flag.Bool("warranty", false, "Print warranty information")
  63
  64                 onlineDeadlineSec = flag.Uint("onlinedeadline", 0, "Override onlinedeadline option")
  65                 maxOnlineTimeSec  = flag.Uint("maxonlinetime", 0, "Override maxonlinetime option")
  66
  67                 autoToss       = flag.Bool("autotoss", false, "Toss after call is finished")
  68                 autoTossDoSeen = flag.Bool("autotoss-seen", false, "Create seen/ files during tossing")
  69                 autoTossNoFile = flag.Bool("autotoss-nofile", false, "Do not process \"file\" packets during tossing")
  70                 autoTossNoFreq = flag.Bool("autotoss-nofreq", false, "Do not process \"freq\" packets during tossing")
  71                 autoTossNoExec = flag.Bool("autotoss-noexec", false, "Do not process \"exec\" packets during tossing")
  72                 autoTossNoTrns = flag.Bool("autotoss-notrns", false, "Do not process \"trns\" packets during tossing")
  73                 autoTossNoArea = flag.Bool("autotoss-noarea", false, "Do not process \"area\" packets during tossing")
  74         )
  75         log.SetFlags(log.Lshortfile)
  76         flag.Usage = usage
  77         flag.Parse()
  78         if *warranty {
  79                 fmt.Println(nncp.Warranty)
  80                 return
  81         }
  82         if *version {
  83                 fmt.Println(nncp.VersionGet())
  84                 return
  85         }
  86         if flag.NArg() < 1 {
  87                 usage()
  88                 os.Exit(1)
  89         }
  90         nice, err := nncp.NicenessParse(*niceRaw)
  91         if err != nil {
  92                 log.Fatalln(err)
  93         }
  94         if *rxOnly && *txOnly {
  95                 log.Fatalln("-rx and -tx can not be set simultaneously")
  96         }
  97
  98         ctx, err := nncp.CtxFromCmdline(
  99                 *cfgPath,
 100                 *spoolPath,
 101                 *logPath,
 102                 *quiet,
 103                 *showPrgrs,
 104                 *omitPrgrs,
 105                 *debug,
 106         )
 107         if err != nil {
 108                 log.Fatalln("Error during initialization:", err)
 109         }
 110         if ctx.Self == nil {
 111                 log.Fatalln("Config lacks private keys")
 112         }
 113
 114         splitted := strings.SplitN(flag.Arg(0), ":", 2)
 115         node, err := ctx.FindNode(splitted[0])
 116         if err != nil {
 117                 log.Fatalln("Invalid NODE specified:", err)
 118         }
 119         if node.NoisePub == nil {
 120                 log.Fatalln("Node does not have online communication capability")
 121         }
 122
 123         onlineDeadline := node.OnlineDeadline
 124         if *onlineDeadlineSec != 0 {
 125                 onlineDeadline = time.Duration(*onlineDeadlineSec) * time.Second
 126         }
 127         maxOnlineTime := node.MaxOnlineTime
 128         if *maxOnlineTimeSec != 0 {
 129                 maxOnlineTime = time.Duration(*maxOnlineTimeSec) * time.Second
 130         }
 131
 132         var xxOnly nncp.TRxTx
 133         if *rxOnly {
 134                 xxOnly = nncp.TRx
 135         } else if *txOnly {
 136                 xxOnly = nncp.TTx
 137         }
 138
 139         var addrs []string
 140         if *ucspi {
 141                 addrs = append(addrs, nncp.UCSPITCPClient)
 142         } else if flag.NArg() == 2 {
 143                 addrs = append(addrs, flag.Arg(1))
 144         } else if len(splitted) == 2 {
 145                 addr, known := ctx.Neigh[*node.Id].Addrs[splitted[1]]
 146                 if !known {
 147                         log.Fatalln("Unknown ADDR specified")
 148                 }
 149                 addrs = append(addrs, addr)
 150         } else {
 151                 for _, addr := range ctx.Neigh[*node.Id].Addrs {
 152                         addrs = append(addrs, addr)
 153                 }
 154         }
 155
 156         if *mcdWait > 0 {
 157                 ifis, err := net.Interfaces()
 158                 if err != nil {
 159                         log.Fatalln("Can not get network interfaces list:", err)
 160                 }
 161                 for _, ifiReString := range ctx.MCDRxIfis {
 162                         ifiRe, err := regexp.CompilePOSIX(ifiReString)
 163                         if err != nil {
 164                                 log.Fatalf("Can not compile POSIX regexp \"%s\": %s", ifiReString, err)
 165                         }
 166                         for _, ifi := range ifis {
 167                                 if ifiRe.MatchString(ifi.Name) {
 168                                         if err = ctx.MCDRx(ifi.Name); err != nil {
 169                                                 log.Printf("Can not run MCD reception on %s: %s", ifi.Name, err)
 170                                         }
 171                                 }
 172                         }
 173                 }
 174                 addrs = nil
 175                 for i := int(*mcdWait); i > 0; i-- {
 176                         nncp.MCDAddrsM.RLock()
 177                         for _, mcdAddr := range nncp.MCDAddrs[*node.Id] {
 178                                 addrs = append(addrs, mcdAddr.Addr.String())
 179                         }
 180                         if len(addrs) > 0 {
 181                                 break
 182                         }
 183                         nncp.MCDAddrsM.RUnlock()
 184                         time.Sleep(time.Second)
 185                 }
 186                 if len(addrs) == 0 {
 187                         log.Fatalf("No MCD packets from the node during %d seconds", *mcdWait)
 188                 }
 189         }
 190
 191         var onlyPkts map[[32]byte]bool
 192         if len(*onlyPktsRaw) > 0 {
 193                 splitted = strings.Split(*onlyPktsRaw, ",")
 194                 onlyPkts = make(map[[32]byte]bool, len(splitted))
 195                 for _, pktIdRaw := range splitted {
 196                         pktId, err := nncp.Base32Codec.DecodeString(pktIdRaw)
 197                         if err != nil {
 198                                 log.Fatalln("Invalid packet specified: ", err)
 199                         }
 200                         pktIdArr := new([32]byte)
 201                         copy(pktIdArr[:], pktId)
 202                         onlyPkts[*pktIdArr] = true
 203                 }
 204         }
 205
 206         ctx.Umask()
 207
 208         var autoTossFinish chan struct{}
 209         var autoTossBadCode chan bool
 210         if *autoToss {
 211                 autoTossFinish, autoTossBadCode = ctx.AutoToss(
 212                         node.Id,
 213                         nice,
 214                         *autoTossDoSeen,
 215                         *autoTossNoFile,
 216                         *autoTossNoFreq,
 217                         *autoTossNoExec,
 218                         *autoTossNoTrns,
 219                         *autoTossNoArea,
 220                 )
 221         }
 222
 223         badCode := !ctx.CallNode(
 224                 node,
 225                 addrs,
 226                 nice,
 227                 xxOnly,
 228                 *rxRate,
 229                 *txRate,
 230                 onlineDeadline,
 231                 maxOnlineTime,
 232                 *listOnly,
 233                 *noCK,
 234                 onlyPkts,
 235         )
 236
 237         if *autoToss {
 238                 close(autoTossFinish)
 239                 badCode = (<-autoTossBadCode) || badCode
 240         }
 241         nncp.SPCheckerWg.Wait()
 242         if badCode {
 243                 os.Exit(1)
 244         }
 245 }