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         )
  85         log.SetFlags(log.Lshortfile)
  86         flag.Usage = usage
  87         flag.Parse()
  88         if *warranty {
  89                 fmt.Println(nncp.Warranty)
  90                 return
  91         }
  92         if *version {
  93                 fmt.Println(nncp.VersionGet())
  94                 return
  95         }
  96         if flag.NArg() < 1 {
  97                 usage()
  98                 os.Exit(1)
  99         }
 100         nice, err := nncp.NicenessParse(*niceRaw)
 101         if err != nil {
 102                 log.Fatalln(err)
 103         }
 104         if *rxOnly && *txOnly {
 105                 log.Fatalln("-rx and -tx can not be set simultaneously")
 106         }
 107
 108         ctx, err := nncp.CtxFromCmdline(
 109                 *cfgPath,
 110                 *spoolPath,
 111                 *logPath,
 112                 *quiet,
 113                 *showPrgrs,
 114                 *omitPrgrs,
 115                 *debug,
 116         )
 117         if err != nil {
 118                 log.Fatalln("Error during initialization:", err)
 119         }
 120         if ctx.Self == nil {
 121                 log.Fatalln("Config lacks private keys")
 122         }
 123
 124         splitted := strings.SplitN(flag.Arg(0), ":", 2)
 125         node, err := ctx.FindNode(splitted[0])
 126         if err != nil {
 127                 log.Fatalln("Invalid NODE specified:", err)
 128         }
 129         if node.NoisePub == nil {
 130                 log.Fatalln("Node does not have online communication capability")
 131         }
 132
 133         onlineDeadline := node.OnlineDeadline
 134         if *onlineDeadlineSec != 0 {
 135                 onlineDeadline = time.Duration(*onlineDeadlineSec) * time.Second
 136         }
 137         maxOnlineTime := node.MaxOnlineTime
 138         if *maxOnlineTimeSec != 0 {
 139                 maxOnlineTime = time.Duration(*maxOnlineTimeSec) * time.Second
 140         }
 141
 142         var xxOnly nncp.TRxTx
 143         if *rxOnly {
 144                 xxOnly = nncp.TRx
 145         } else if *txOnly {
 146                 xxOnly = nncp.TTx
 147         }
 148
 149         var addrs []string
 150         if *ucspi {
 151                 addrs = append(addrs, nncp.UCSPITCPClient)
 152         } else if flag.NArg() == 2 {
 153                 addrs = append(addrs, flag.Arg(1))
 154         } else if len(splitted) == 2 {
 155                 addr, known := ctx.Neigh[*node.Id].Addrs[splitted[1]]
 156                 if !known {
 157                         log.Fatalln("Unknown ADDR specified")
 158                 }
 159                 addrs = append(addrs, addr)
 160         } else {
 161                 for _, addr := range ctx.Neigh[*node.Id].Addrs {
 162                         addrs = append(addrs, addr)
 163                 }
 164         }
 165
 166         if *mcdWait > 0 {
 167                 ifis, err := net.Interfaces()
 168                 if err != nil {
 169                         log.Fatalln("Can not get network interfaces list:", err)
 170                 }
 171                 for _, ifiReString := range ctx.MCDRxIfis {
 172                         ifiRe, err := regexp.CompilePOSIX(ifiReString)
 173                         if err != nil {
 174                                 log.Fatalf("Can not compile POSIX regexp \"%s\": %s", ifiReString, err)
 175                         }
 176                         for _, ifi := range ifis {
 177                                 if ifiRe.MatchString(ifi.Name) {
 178                                         if err = ctx.MCDRx(ifi.Name); err != nil {
 179                                                 log.Printf("Can not run MCD reception on %s: %s", ifi.Name, err)
 180                                         }
 181                                 }
 182                         }
 183                 }
 184                 addrs = nil
 185                 for i := int(*mcdWait); i > 0; i-- {
 186                         nncp.MCDAddrsM.RLock()
 187                         for _, mcdAddr := range nncp.MCDAddrs[*node.Id] {
 188                                 addrs = append(addrs, mcdAddr.Addr.String())
 189                         }
 190                         if len(addrs) > 0 {
 191                                 break
 192                         }
 193                         nncp.MCDAddrsM.RUnlock()
 194                         time.Sleep(time.Second)
 195                 }
 196                 if len(addrs) == 0 {
 197                         log.Fatalf("No MCD packets from the node during %d seconds", *mcdWait)
 198                 }
 199         }
 200
 201         var onlyPkts map[[32]byte]bool
 202         if len(*onlyPktsRaw) > 0 {
 203                 splitted = strings.Split(*onlyPktsRaw, ",")
 204                 onlyPkts = make(map[[32]byte]bool, len(splitted))
 205                 for _, pktIdRaw := range splitted {
 206                         pktId, err := nncp.Base32Codec.DecodeString(pktIdRaw)
 207                         if err != nil {
 208                                 log.Fatalln("Invalid packet specified: ", err)
 209                         }
 210                         pktIdArr := new([32]byte)
 211                         copy(pktIdArr[:], pktId)
 212                         onlyPkts[*pktIdArr] = true
 213                 }
 214         }
 215
 216         ctx.Umask()
 217
 218         var autoTossFinish chan struct{}
 219         var autoTossBadCode chan bool
 220         if *autoToss {
 221                 autoTossFinish, autoTossBadCode = ctx.AutoToss(
 222                         node.Id,
 223                         &nncp.TossOpts{
 224                                 Nice:   nice,
 225                                 DoSeen: *autoTossDoSeen,
 226                                 NoFile: *autoTossNoFile,
 227                                 NoFreq: *autoTossNoFreq,
 228                                 NoExec: *autoTossNoExec,
 229                                 NoTrns: *autoTossNoTrns,
 230                                 NoArea: *autoTossNoArea,
 231                                 NoACK:  *autoTossNoACK,
 232                         },
 233                 )
 234         }
 235
 236         badCode := !ctx.CallNode(
 237                 node,
 238                 addrs,
 239                 nice,
 240                 xxOnly,
 241                 *rxRate,
 242                 *txRate,
 243                 onlineDeadline,
 244                 maxOnlineTime,
 245                 *listOnly,
 246                 *noCK,
 247                 onlyPkts,
 248         )
 249
 250         if *autoToss {
 251                 close(autoTossFinish)
 252                 badCode = (<-autoTossBadCode) || badCode
 253         }
 254         nncp.SPCheckerWg.Wait()
 255         if badCode {
 256                 os.Exit(1)
 257         }
 258 }