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                 autoTossNoACK  = flag.Bool("autotoss-noack", false, "Do not process \"ack\" packets during tossing")
  63         )
  64         log.SetFlags(log.Lshortfile)
  65         flag.Usage = usage
  66         flag.Parse()
  67         if *warranty {
  68                 fmt.Println(nncp.Warranty)
  69                 return
  70         }
  71         if *version {
  72                 fmt.Println(nncp.VersionGet())
  73                 return
  74         }
  75
  76         ctx, err := nncp.CtxFromCmdline(
  77                 *cfgPath,
  78                 *spoolPath,
  79                 *logPath,
  80                 *quiet,
  81                 *showPrgrs,
  82                 *omitPrgrs,
  83                 *debug,
  84         )
  85         if err != nil {
  86                 log.Fatalln("Error during initialization:", err)
  87         }
  88         if ctx.Self == nil {
  89                 log.Fatalln("Config lacks private keys")
  90         }
  91         ctx.Umask()
  92
  93         var nodes []*nncp.Node
  94         if flag.NArg() > 0 {
  95                 for _, nodeId := range flag.Args() {
  96                         node, err := ctx.FindNode(nodeId)
  97                         if err != nil {
  98                                 log.Fatalln("Invalid NODE specified:", err)
  99                         }
 100                         if node.NoisePub == nil {
 101                                 log.Fatalln("Node", nodeId, "does not have online communication capability")
 102                         }
 103                         if len(node.Calls) == 0 {
 104                                 ctx.LogD(
 105                                         "caller-no-calls",
 106                                         nncp.LEs{{K: "Node", V: node.Id}},
 107                                         func(les nncp.LEs) string {
 108                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 109                                         },
 110                                 )
 111                                 continue
 112                         }
 113                         nodes = append(nodes, node)
 114                 }
 115         } else {
 116                 for _, node := range ctx.Neigh {
 117                         if len(node.Calls) == 0 {
 118                                 ctx.LogD(
 119                                         "caller-no-calls",
 120                                         nncp.LEs{{K: "Node", V: node.Id}},
 121                                         func(les nncp.LEs) string {
 122                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 123                                         },
 124                                 )
 125                                 continue
 126                         }
 127                         nodes = append(nodes, node)
 128                 }
 129         }
 130
 131         ifis, err := net.Interfaces()
 132         if err != nil {
 133                 log.Fatalln("Can not get network interfaces list:", err)
 134         }
 135         for _, ifiReString := range ctx.MCDRxIfis {
 136                 ifiRe, err := regexp.CompilePOSIX(ifiReString)
 137                 if err != nil {
 138                         log.Fatalf("Can not compile POSIX regexp \"%s\": %s", ifiReString, err)
 139                 }
 140                 for _, ifi := range ifis {
 141                         if ifiRe.MatchString(ifi.Name) {
 142                                 if err = ctx.MCDRx(ifi.Name); err != nil {
 143                                         log.Printf("Can not run MCD reception on %s: %s", ifi.Name, err)
 144                                 }
 145                         }
 146                 }
 147         }
 148
 149         var wg sync.WaitGroup
 150         for _, node := range nodes {
 151                 for i, call := range node.Calls {
 152                         wg.Add(1)
 153                         go func(node *nncp.Node, i int, call *nncp.Call) {
 154                                 defer wg.Done()
 155                                 var addrsFromCfg []string
 156                                 if call.Addr == nil {
 157                                         for _, addr := range node.Addrs {
 158                                                 addrsFromCfg = append(addrsFromCfg, addr)
 159                                         }
 160                                 } else {
 161                                         addrsFromCfg = append(addrsFromCfg, *call.Addr)
 162                                 }
 163                                 les := nncp.LEs{{K: "Node", V: node.Id}, {K: "CallIndex", V: i}}
 164                                 logMsg := func(les nncp.LEs) string {
 165                                         return fmt.Sprintf("%s node, call %d", node.Name, i)
 166                                 }
 167                                 for {
 168                                         n := time.Now()
 169                                         t := call.Cron.Next(n)
 170                                         ctx.LogD("caller-time", les, func(les nncp.LEs) string {
 171                                                 return logMsg(les) + ": " + t.String()
 172                                         })
 173                                         if t.IsZero() {
 174                                                 ctx.LogE("caller", les, errors.New("got zero time"), logMsg)
 175                                                 return
 176                                         }
 177                                         time.Sleep(t.Sub(n))
 178                                         node.Lock()
 179                                         if node.Busy {
 180                                                 node.Unlock()
 181                                                 ctx.LogD("caller-busy", les, func(les nncp.LEs) string {
 182                                                         return logMsg(les) + ": busy"
 183                                                 })
 184                                                 continue
 185                                         } else {
 186                                                 node.Busy = true
 187                                                 node.Unlock()
 188
 189                                                 if call.WhenTxExists && call.Xx != "TRx" {
 190                                                         ctx.LogD("caller", les, func(les nncp.LEs) string {
 191                                                                 return logMsg(les) + ": checking tx existence"
 192                                                         })
 193                                                         txExists := false
 194                                                         for job := range ctx.Jobs(node.Id, nncp.TTx) {
 195                                                                 if job.PktEnc.Nice > call.Nice {
 196                                                                         continue
 197                                                                 }
 198                                                                 txExists = true
 199                                                         }
 200                                                         if !txExists {
 201                                                                 ctx.LogD("caller-no-tx", les, func(les nncp.LEs) string {
 202                                                                         return logMsg(les) + ": no tx"
 203                                                                 })
 204                                                                 node.Lock()
 205                                                                 node.Busy = false
 206                                                                 node.Unlock()
 207                                                                 continue
 208                                                         }
 209                                                 }
 210
 211                                                 var autoTossFinish chan struct{}
 212                                                 var autoTossBadCode chan bool
 213                                                 if call.AutoToss || *autoToss {
 214                                                         autoTossFinish, autoTossBadCode = ctx.AutoToss(
 215                                                                 node.Id,
 216                                                                 call.Nice,
 217                                                                 call.AutoTossDoSeen || *autoTossDoSeen,
 218                                                                 call.AutoTossNoFile || *autoTossNoFile,
 219                                                                 call.AutoTossNoFreq || *autoTossNoFreq,
 220                                                                 call.AutoTossNoExec || *autoTossNoExec,
 221                                                                 call.AutoTossNoTrns || *autoTossNoTrns,
 222                                                                 call.AutoTossNoArea || *autoTossNoArea,
 223                                                                 call.AutoTossNoACK || *autoTossNoACK,
 224                                                         )
 225                                                 }
 226
 227                                                 var addrs []string
 228                                                 if !call.MCDIgnore {
 229                                                         nncp.MCDAddrsM.RLock()
 230                                                         for _, mcdAddr := range nncp.MCDAddrs[*node.Id] {
 231                                                                 ctx.LogD("caller", les, func(les nncp.LEs) string {
 232                                                                         return logMsg(les) + ": adding MCD address: " +
 233                                                                                 mcdAddr.Addr.String()
 234                                                                 })
 235                                                                 addrs = append(addrs, mcdAddr.Addr.String())
 236                                                         }
 237                                                         nncp.MCDAddrsM.RUnlock()
 238                                                 }
 239
 240                                                 ctx.CallNode(
 241                                                         node,
 242                                                         append(addrs, addrsFromCfg...),
 243                                                         call.Nice,
 244                                                         call.Xx,
 245                                                         call.RxRate,
 246                                                         call.TxRate,
 247                                                         call.OnlineDeadline,
 248                                                         call.MaxOnlineTime,
 249                                                         false,
 250                                                         call.NoCK,
 251                                                         nil,
 252                                                 )
 253
 254                                                 if call.AutoToss || *autoToss {
 255                                                         close(autoTossFinish)
 256                                                         <-autoTossBadCode
 257                                                 }
 258
 259                                                 node.Lock()
 260                                                 node.Busy = false
 261                                                 node.Unlock()
 262                                         }
 263                                 }
 264                         }(node, i, call)
 265                 }
 266         }
 267         wg.Wait()
 268         nncp.SPCheckerWg.Wait()
 269 }