src/cmd/nncp-caller/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 // Croned NNCP TCP daemon caller.
  19 package main
  20
  21 import (
  22         "errors"
  23         "flag"
  24         "fmt"
  25         "log"
  26         "net"
  27         "os"
  28         "regexp"
  29         "sync"
  30         "time"
  31
  32         "go.cypherpunks.ru/nncp/v8"
  33 )
  34
  35 func usage() {
  36         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  37         fmt.Fprintf(os.Stderr, "nncp-caller -- croned NNCP TCP daemon caller\n\n")
  38         fmt.Fprintf(os.Stderr, "Usage: %s [options] [NODE ...]\n", os.Args[0])
  39         fmt.Fprintln(os.Stderr, "Options:")
  40         flag.PrintDefaults()
  41 }
  42
  43 func main() {
  44         var (
  45                 cfgPath   = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  46                 spoolPath = flag.String("spool", "", "Override path to spool")
  47                 logPath   = flag.String("log", "", "Override path to logfile")
  48                 quiet     = flag.Bool("quiet", false, "Print only errors")
  49                 showPrgrs = flag.Bool("progress", false, "Force progress showing")
  50                 omitPrgrs = flag.Bool("noprogress", false, "Omit progress showing")
  51                 debug     = flag.Bool("debug", false, "Print debug messages")
  52                 version   = flag.Bool("version", false, "Print version information")
  53                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  54
  55                 autoToss       = flag.Bool("autotoss", false, "Toss after call is finished")
  56                 autoTossDoSeen = flag.Bool("autotoss-seen", false, "Create seen/ files during tossing")
  57                 autoTossNoFile = flag.Bool("autotoss-nofile", false, "Do not process \"file\" packets during tossing")
  58                 autoTossNoFreq = flag.Bool("autotoss-nofreq", false, "Do not process \"freq\" packets during tossing")
  59                 autoTossNoExec = flag.Bool("autotoss-noexec", false, "Do not process \"exec\" packets during tossing")
  60                 autoTossNoTrns = flag.Bool("autotoss-notrns", false, "Do not process \"trns\" packets during tossing")
  61                 autoTossNoArea = flag.Bool("autotoss-noarea", false, "Do not process \"area\" packets during tossing")
  62         )
  63         log.SetFlags(log.Lshortfile)
  64         flag.Usage = usage
  65         flag.Parse()
  66         if *warranty {
  67                 fmt.Println(nncp.Warranty)
  68                 return
  69         }
  70         if *version {
  71                 fmt.Println(nncp.VersionGet())
  72                 return
  73         }
  74
  75         ctx, err := nncp.CtxFromCmdline(
  76                 *cfgPath,
  77                 *spoolPath,
  78                 *logPath,
  79                 *quiet,
  80                 *showPrgrs,
  81                 *omitPrgrs,
  82                 *debug,
  83         )
  84         if err != nil {
  85                 log.Fatalln("Error during initialization:", err)
  86         }
  87         if ctx.Self == nil {
  88                 log.Fatalln("Config lacks private keys")
  89         }
  90         ctx.Umask()
  91
  92         var nodes []*nncp.Node
  93         if flag.NArg() > 0 {
  94                 for _, nodeId := range flag.Args() {
  95                         node, err := ctx.FindNode(nodeId)
  96                         if err != nil {
  97                                 log.Fatalln("Invalid NODE specified:", err)
  98                         }
  99                         if node.NoisePub == nil {
 100                                 log.Fatalln("Node", nodeId, "does not have online communication capability")
 101                         }
 102                         if len(node.Calls) == 0 {
 103                                 ctx.LogD(
 104                                         "caller-no-calls",
 105                                         nncp.LEs{{K: "Node", V: node.Id}},
 106                                         func(les nncp.LEs) string {
 107                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 108                                         },
 109                                 )
 110                                 continue
 111                         }
 112                         nodes = append(nodes, node)
 113                 }
 114         } else {
 115                 for _, node := range ctx.Neigh {
 116                         if len(node.Calls) == 0 {
 117                                 ctx.LogD(
 118                                         "caller-no-calls",
 119                                         nncp.LEs{{K: "Node", V: node.Id}},
 120                                         func(les nncp.LEs) string {
 121                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 122                                         },
 123                                 )
 124                                 continue
 125                         }
 126                         nodes = append(nodes, node)
 127                 }
 128         }
 129
 130         ifis, err := net.Interfaces()
 131         if err != nil {
 132                 log.Fatalln("Can not get network interfaces list:", err)
 133         }
 134         for _, ifiReString := range ctx.MCDRxIfis {
 135                 ifiRe, err := regexp.CompilePOSIX(ifiReString)
 136                 if err != nil {
 137                         log.Fatalf("Can not compile POSIX regexp \"%s\": %s", ifiReString, err)
 138                 }
 139                 for _, ifi := range ifis {
 140                         if ifiRe.MatchString(ifi.Name) {
 141                                 if err = ctx.MCDRx(ifi.Name); err != nil {
 142                                         log.Printf("Can not run MCD reception on %s: %s", ifi.Name, err)
 143                                 }
 144                         }
 145                 }
 146         }
 147
 148         var wg sync.WaitGroup
 149         for _, node := range nodes {
 150                 for i, call := range node.Calls {
 151                         wg.Add(1)
 152                         go func(node *nncp.Node, i int, call *nncp.Call) {
 153                                 defer wg.Done()
 154                                 var addrsFromCfg []string
 155                                 if call.Addr == nil {
 156                                         for _, addr := range node.Addrs {
 157                                                 addrsFromCfg = append(addrsFromCfg, addr)
 158                                         }
 159                                 } else {
 160                                         addrsFromCfg = append(addrsFromCfg, *call.Addr)
 161                                 }
 162                                 les := nncp.LEs{{K: "Node", V: node.Id}, {K: "CallIndex", V: i}}
 163                                 logMsg := func(les nncp.LEs) string {
 164                                         return fmt.Sprintf("%s node, call %d", node.Name, i)
 165                                 }
 166                                 for {
 167                                         n := time.Now()
 168                                         t := call.Cron.Next(n)
 169                                         ctx.LogD("caller-time", les, func(les nncp.LEs) string {
 170                                                 return logMsg(les) + ": " + t.String()
 171                                         })
 172                                         if t.IsZero() {
 173                                                 ctx.LogE("caller", les, errors.New("got zero time"), logMsg)
 174                                                 return
 175                                         }
 176                                         time.Sleep(t.Sub(n))
 177                                         node.Lock()
 178                                         if node.Busy {
 179                                                 node.Unlock()
 180                                                 ctx.LogD("caller-busy", les, func(les nncp.LEs) string {
 181                                                         return logMsg(les) + ": busy"
 182                                                 })
 183                                                 continue
 184                                         } else {
 185                                                 node.Busy = true
 186                                                 node.Unlock()
 187
 188                                                 if call.WhenTxExists && call.Xx != "TRx" {
 189                                                         ctx.LogD("caller", les, func(les nncp.LEs) string {
 190                                                                 return logMsg(les) + ": checking tx existence"
 191                                                         })
 192                                                         txExists := false
 193                                                         for job := range ctx.Jobs(node.Id, nncp.TTx) {
 194                                                                 if job.PktEnc.Nice > call.Nice {
 195                                                                         continue
 196                                                                 }
 197                                                                 txExists = true
 198                                                         }
 199                                                         if !txExists {
 200                                                                 ctx.LogD("caller-no-tx", les, func(les nncp.LEs) string {
 201                                                                         return logMsg(les) + ": no tx"
 202                                                                 })
 203                                                                 node.Lock()
 204                                                                 node.Busy = false
 205                                                                 node.Unlock()
 206                                                                 continue
 207                                                         }
 208                                                 }
 209
 210                                                 var autoTossFinish chan struct{}
 211                                                 var autoTossBadCode chan bool
 212                                                 if call.AutoToss || *autoToss {
 213                                                         autoTossFinish, autoTossBadCode = ctx.AutoToss(
 214                                                                 node.Id,
 215                                                                 call.Nice,
 216                                                                 call.AutoTossDoSeen || *autoTossDoSeen,
 217                                                                 call.AutoTossNoFile || *autoTossNoFile,
 218                                                                 call.AutoTossNoFreq || *autoTossNoFreq,
 219                                                                 call.AutoTossNoExec || *autoTossNoExec,
 220                                                                 call.AutoTossNoTrns || *autoTossNoTrns,
 221                                                                 call.AutoTossNoArea || *autoTossNoArea,
 222                                                         )
 223                                                 }
 224
 225                                                 var addrs []string
 226                                                 if !call.MCDIgnore {
 227                                                         nncp.MCDAddrsM.RLock()
 228                                                         for _, mcdAddr := range nncp.MCDAddrs[*node.Id] {
 229                                                                 ctx.LogD("caller", les, func(les nncp.LEs) string {
 230                                                                         return logMsg(les) + ": adding MCD address: " +
 231                                                                                 mcdAddr.Addr.String()
 232                                                                 })
 233                                                                 addrs = append(addrs, mcdAddr.Addr.String())
 234                                                         }
 235                                                         nncp.MCDAddrsM.RUnlock()
 236                                                 }
 237
 238                                                 ctx.CallNode(
 239                                                         node,
 240                                                         append(addrs, addrsFromCfg...),
 241                                                         call.Nice,
 242                                                         call.Xx,
 243                                                         call.RxRate,
 244                                                         call.TxRate,
 245                                                         call.OnlineDeadline,
 246                                                         call.MaxOnlineTime,
 247                                                         false,
 248                                                         call.NoCK,
 249                                                         nil,
 250                                                 )
 251
 252                                                 if call.AutoToss || *autoToss {
 253                                                         close(autoTossFinish)
 254                                                         <-autoTossBadCode
 255                                                 }
 256
 257                                                 node.Lock()
 258                                                 node.Busy = false
 259                                                 node.Unlock()
 260                                         }
 261                                 }
 262                         }(node, i, call)
 263                 }
 264         }
 265         wg.Wait()
 266         nncp.SPCheckerWg.Wait()
 267 }