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", 0, "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                 autoTossNoACK  = flag.Bool("autotoss-noack", false, "Do not process \"ack\" packets during tossing")
  75         )
  76         log.SetFlags(log.Lshortfile)
  77         flag.Usage = usage
  78         flag.Parse()
  79         if *warranty {
  80                 fmt.Println(nncp.Warranty)
  81                 return
  82         }
  83         if *version {
  84                 fmt.Println(nncp.VersionGet())
  85                 return
  86         }
  87         if flag.NArg() < 1 {
  88                 usage()
  89                 os.Exit(1)
  90         }
  91         nice, err := nncp.NicenessParse(*niceRaw)
  92         if err != nil {
  93                 log.Fatalln(err)
  94         }
  95         if *rxOnly && *txOnly {
  96                 log.Fatalln("-rx and -tx can not be set simultaneously")
  97         }
  98
  99         ctx, err := nncp.CtxFromCmdline(
 100                 *cfgPath,
 101                 *spoolPath,
 102                 *logPath,
 103                 *quiet,
 104                 *showPrgrs,
 105                 *omitPrgrs,
 106                 *debug,
 107         )
 108         if err != nil {
 109                 log.Fatalln("Error during initialization:", err)
 110         }
 111         if ctx.Self == nil {
 112                 log.Fatalln("Config lacks private keys")
 113         }
 114
 115         splitted := strings.SplitN(flag.Arg(0), ":", 2)
 116         node, err := ctx.FindNode(splitted[0])
 117         if err != nil {
 118                 log.Fatalln("Invalid NODE specified:", err)
 119         }
 120         if node.NoisePub == nil {
 121                 log.Fatalln("Node does not have online communication capability")
 122         }
 123
 124         onlineDeadline := node.OnlineDeadline
 125         if *onlineDeadlineSec != 0 {
 126                 onlineDeadline = time.Duration(*onlineDeadlineSec) * time.Second
 127         }
 128         maxOnlineTime := node.MaxOnlineTime
 129         if *maxOnlineTimeSec != 0 {
 130                 maxOnlineTime = time.Duration(*maxOnlineTimeSec) * time.Second
 131         }
 132
 133         var xxOnly nncp.TRxTx
 134         if *rxOnly {
 135                 xxOnly = nncp.TRx
 136         } else if *txOnly {
 137                 xxOnly = nncp.TTx
 138         }
 139
 140         var addrs []string
 141         if *ucspi {
 142                 addrs = append(addrs, nncp.UCSPITCPClient)
 143         } else if flag.NArg() == 2 {
 144                 addrs = append(addrs, flag.Arg(1))
 145         } else if len(splitted) == 2 {
 146                 addr, known := ctx.Neigh[*node.Id].Addrs[splitted[1]]
 147                 if !known {
 148                         log.Fatalln("Unknown ADDR specified")
 149                 }
 150                 addrs = append(addrs, addr)
 151         } else {
 152                 for _, addr := range ctx.Neigh[*node.Id].Addrs {
 153                         addrs = append(addrs, addr)
 154                 }
 155         }
 156
 157         if *mcdWait > 0 {
 158                 ifis, err := net.Interfaces()
 159                 if err != nil {
 160                         log.Fatalln("Can not get network interfaces list:", err)
 161                 }
 162                 for _, ifiReString := range ctx.MCDRxIfis {
 163                         ifiRe, err := regexp.CompilePOSIX(ifiReString)
 164                         if err != nil {
 165                                 log.Fatalf("Can not compile POSIX regexp \"%s\": %s", ifiReString, err)
 166                         }
 167                         for _, ifi := range ifis {
 168                                 if ifiRe.MatchString(ifi.Name) {
 169                                         if err = ctx.MCDRx(ifi.Name); err != nil {
 170                                                 log.Printf("Can not run MCD reception on %s: %s", ifi.Name, err)
 171                                         }
 172                                 }
 173                         }
 174                 }
 175                 addrs = nil
 176                 for i := int(*mcdWait); i > 0; i-- {
 177                         nncp.MCDAddrsM.RLock()
 178                         for _, mcdAddr := range nncp.MCDAddrs[*node.Id] {
 179                                 addrs = append(addrs, mcdAddr.Addr.String())
 180                         }
 181                         if len(addrs) > 0 {
 182                                 break
 183                         }
 184                         nncp.MCDAddrsM.RUnlock()
 185                         time.Sleep(time.Second)
 186                 }
 187                 if len(addrs) == 0 {
 188                         log.Fatalf("No MCD packets from the node during %d seconds", *mcdWait)
 189                 }
 190         }
 191
 192         var onlyPkts map[[32]byte]bool
 193         if len(*onlyPktsRaw) > 0 {
 194                 splitted = strings.Split(*onlyPktsRaw, ",")
 195                 onlyPkts = make(map[[32]byte]bool, len(splitted))
 196                 for _, pktIdRaw := range splitted {
 197                         pktId, err := nncp.Base32Codec.DecodeString(pktIdRaw)
 198                         if err != nil {
 199                                 log.Fatalln("Invalid packet specified: ", err)
 200                         }
 201                         pktIdArr := new([32]byte)
 202                         copy(pktIdArr[:], pktId)
 203                         onlyPkts[*pktIdArr] = true
 204                 }
 205         }
 206
 207         ctx.Umask()
 208
 209         var autoTossFinish chan struct{}
 210         var autoTossBadCode chan bool
 211         if *autoToss {
 212                 autoTossFinish, autoTossBadCode = ctx.AutoToss(
 213                         node.Id,
 214                         nice,
 215                         *autoTossDoSeen,
 216                         *autoTossNoFile,
 217                         *autoTossNoFreq,
 218                         *autoTossNoExec,
 219                         *autoTossNoTrns,
 220                         *autoTossNoArea,
 221                         *autoTossNoACK,
 222                 )
 223         }
 224
 225         badCode := !ctx.CallNode(
 226                 node,
 227                 addrs,
 228                 nice,
 229                 xxOnly,
 230                 *rxRate,
 231                 *txRate,
 232                 onlineDeadline,
 233                 maxOnlineTime,
 234                 *listOnly,
 235                 *noCK,
 236                 onlyPkts,
 237         )
 238
 239         if *autoToss {
 240                 close(autoTossFinish)
 241                 badCode = (<-autoTossBadCode) || badCode
 242         }
 243         nncp.SPCheckerWg.Wait()
 244         if badCode {
 245                 os.Exit(1)
 246         }
 247 }