src/cmd/nncp-call/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2023 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.Fprint(os.Stderr, "nncp-call -- call TCP daemon\n\n")
  36         fmt.Fprintf(os.Stderr, "Usage: %s [options] NODE[:ADDR] [FORCEADDR]\n", os.Args[0])
  37         fmt.Fprintln(os.Stderr, "Options:")
  38         flag.PrintDefaults()
  39 }
  40
  41 func main() {
  42         var (
  43                 cfgPath     = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  44                 ucspi       = flag.Bool("ucspi", false, "Is it started as UCSPI-TCP client")
  45                 niceRaw     = flag.String("nice", nncp.NicenessFmt(255), "Minimal required niceness")
  46                 rxOnly      = flag.Bool("rx", false, "Only receive packets")
  47                 txOnly      = flag.Bool("tx", false, "Only transmit packets")
  48                 listOnly    = flag.Bool("list", false, "Only list remote packets")
  49                 noCK        = flag.Bool("nock", false, "Do no checksum checking")
  50                 onlyPktsRaw = flag.String("pkts", "", "Recieve only that packets, comma separated")
  51                 mcdWait     = flag.Uint("mcd-wait", 0, "Wait for MCD for specified number of seconds")
  52                 rxRate      = flag.Int("rxrate", 0, "Maximal receive rate, pkts/sec")
  53                 txRate      = flag.Int("txrate", 0, "Maximal transmit rate, pkts/sec")
  54                 spoolPath   = flag.String("spool", "", "Override path to spool")
  55                 logPath     = flag.String("log", "", "Override path to logfile")
  56                 quiet       = flag.Bool("quiet", false, "Print only errors")
  57                 showPrgrs   = flag.Bool("progress", false, "Force progress showing")
  58                 omitPrgrs   = flag.Bool("noprogress", false, "Omit progress showing")
  59                 debug       = flag.Bool("debug", false, "Print debug messages")
  60                 version     = flag.Bool("version", false, "Print version information")
  61                 warranty    = flag.Bool("warranty", false, "Print warranty information")
  62
  63                 onlineDeadlineSec = flag.Uint("onlinedeadline", 0,
  64                         "Override onlinedeadline option")
  65                 maxOnlineTimeSec = flag.Uint("maxonlinetime", 0,
  66                         "Override maxonlinetime option")
  67
  68                 autoToss = flag.Bool("autotoss", false,
  69                         "Toss after call is finished")
  70                 autoTossDoSeen = flag.Bool("autotoss-seen", false,
  71                         "Create seen/ files during tossing")
  72                 autoTossNoFile = flag.Bool("autotoss-nofile", false,
  73                         "Do not process \"file\" packets during tossing")
  74                 autoTossNoFreq = flag.Bool("autotoss-nofreq", false,
  75                         "Do not process \"freq\" packets during tossing")
  76                 autoTossNoExec = flag.Bool("autotoss-noexec", false,
  77                         "Do not process \"exec\" packets during tossing")
  78                 autoTossNoTrns = flag.Bool("autotoss-notrns", false,
  79                         "Do not process \"trns\" packets during tossing")
  80                 autoTossNoArea = flag.Bool("autotoss-noarea", false,
  81                         "Do not process \"area\" packets during tossing")
  82                 autoTossNoACK = flag.Bool("autotoss-noack", false,
  83                         "Do not process \"ack\" packets during tossing")
  84                 autoTossGenACK = flag.Bool("autotoss-gen-ack", false,
  85                         "Generate ACK packets")
  86         )
  87         log.SetFlags(log.Lshortfile)
  88         flag.Usage = usage
  89         flag.Parse()
  90         if *warranty {
  91                 fmt.Println(nncp.Warranty)
  92                 return
  93         }
  94         if *version {
  95                 fmt.Println(nncp.VersionGet())
  96                 return
  97         }
  98         if flag.NArg() < 1 {
  99                 usage()
 100                 os.Exit(1)
 101         }
 102         nice, err := nncp.NicenessParse(*niceRaw)
 103         if err != nil {
 104                 log.Fatalln(err)
 105         }
 106         if *rxOnly && *txOnly {
 107                 log.Fatalln("-rx and -tx can not be set simultaneously")
 108         }
 109
 110         ctx, err := nncp.CtxFromCmdline(
 111                 *cfgPath,
 112                 *spoolPath,
 113                 *logPath,
 114                 *quiet,
 115                 *showPrgrs,
 116                 *omitPrgrs,
 117                 *debug,
 118         )
 119         if err != nil {
 120                 log.Fatalln("Error during initialization:", err)
 121         }
 122         if ctx.Self == nil {
 123                 log.Fatalln("Config lacks private keys")
 124         }
 125
 126         splitted := strings.SplitN(flag.Arg(0), ":", 2)
 127         node, err := ctx.FindNode(splitted[0])
 128         if err != nil {
 129                 log.Fatalln("Invalid NODE specified:", err)
 130         }
 131         if node.NoisePub == nil {
 132                 log.Fatalln("Node does not have online communication capability")
 133         }
 134
 135         onlineDeadline := node.OnlineDeadline
 136         if *onlineDeadlineSec != 0 {
 137                 onlineDeadline = time.Duration(*onlineDeadlineSec) * time.Second
 138         }
 139         maxOnlineTime := node.MaxOnlineTime
 140         if *maxOnlineTimeSec != 0 {
 141                 maxOnlineTime = time.Duration(*maxOnlineTimeSec) * time.Second
 142         }
 143
 144         var xxOnly nncp.TRxTx
 145         if *rxOnly {
 146                 xxOnly = nncp.TRx
 147         } else if *txOnly {
 148                 xxOnly = nncp.TTx
 149         }
 150
 151         var addrs []string
 152         if *ucspi {
 153                 addrs = append(addrs, nncp.UCSPITCPClient)
 154         } else if flag.NArg() == 2 {
 155                 addrs = append(addrs, flag.Arg(1))
 156         } else if len(splitted) == 2 {
 157                 addr, known := ctx.Neigh[*node.Id].Addrs[splitted[1]]
 158                 if !known {
 159                         log.Fatalln("Unknown ADDR specified")
 160                 }
 161                 addrs = append(addrs, addr)
 162         } else {
 163                 for _, addr := range ctx.Neigh[*node.Id].Addrs {
 164                         addrs = append(addrs, addr)
 165                 }
 166         }
 167
 168         if *mcdWait > 0 {
 169                 ifis, err := net.Interfaces()
 170                 if err != nil {
 171                         log.Fatalln("Can not get network interfaces list:", err)
 172                 }
 173                 for _, ifiReString := range ctx.MCDRxIfis {
 174                         ifiRe, err := regexp.CompilePOSIX(ifiReString)
 175                         if err != nil {
 176                                 log.Fatalf("Can not compile POSIX regexp \"%s\": %s", ifiReString, err)
 177                         }
 178                         for _, ifi := range ifis {
 179                                 if ifiRe.MatchString(ifi.Name) {
 180                                         if err = ctx.MCDRx(ifi.Name); err != nil {
 181                                                 log.Printf("Can not run MCD reception on %s: %s", ifi.Name, err)
 182                                         }
 183                                 }
 184                         }
 185                 }
 186                 addrs = nil
 187                 for i := int(*mcdWait); i > 0; i-- {
 188                         nncp.MCDAddrsM.RLock()
 189                         for _, mcdAddr := range nncp.MCDAddrs[*node.Id] {
 190                                 addrs = append(addrs, mcdAddr.Addr.String())
 191                         }
 192                         if len(addrs) > 0 {
 193                                 break
 194                         }
 195                         nncp.MCDAddrsM.RUnlock()
 196                         time.Sleep(time.Second)
 197                 }
 198                 if len(addrs) == 0 {
 199                         log.Fatalf("No MCD packets from the node during %d seconds", *mcdWait)
 200                 }
 201         }
 202
 203         var onlyPkts map[[32]byte]bool
 204         if len(*onlyPktsRaw) > 0 {
 205                 splitted = strings.Split(*onlyPktsRaw, ",")
 206                 onlyPkts = make(map[[32]byte]bool, len(splitted))
 207                 for _, pktIdRaw := range splitted {
 208                         pktId, err := nncp.Base32Codec.DecodeString(pktIdRaw)
 209                         if err != nil {
 210                                 log.Fatalln("Invalid packet specified: ", err)
 211                         }
 212                         pktIdArr := new([32]byte)
 213                         copy(pktIdArr[:], pktId)
 214                         onlyPkts[*pktIdArr] = true
 215                 }
 216         }
 217
 218         ctx.Umask()
 219
 220         var autoTossFinish chan struct{}
 221         var autoTossBadCode chan bool
 222         if *autoToss {
 223                 autoTossFinish, autoTossBadCode = ctx.AutoToss(
 224                         node.Id,
 225                         &nncp.TossOpts{
 226                                 Nice:   nice,
 227                                 DoSeen: *autoTossDoSeen,
 228                                 NoFile: *autoTossNoFile,
 229                                 NoFreq: *autoTossNoFreq,
 230                                 NoExec: *autoTossNoExec,
 231                                 NoTrns: *autoTossNoTrns,
 232                                 NoArea: *autoTossNoArea,
 233                                 NoACK:  *autoTossNoACK,
 234                                 GenACK: *autoTossGenACK,
 235                         },
 236                 )
 237         }
 238
 239         badCode := !ctx.CallNode(
 240                 node,
 241                 addrs,
 242                 nice,
 243                 xxOnly,
 244                 *rxRate,
 245                 *txRate,
 246                 onlineDeadline,
 247                 maxOnlineTime,
 248                 *listOnly,
 249                 *noCK,
 250                 onlyPkts,
 251         )
 252
 253         if *autoToss {
 254                 close(autoTossFinish)
 255                 badCode = (<-autoTossBadCode) || badCode
 256         }
 257         nncp.SPCheckerWg.Wait()
 258         if badCode {
 259                 os.Exit(1)
 260         }
 261 }