src/cmd/nncp-caller/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 // 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.Fprint(os.Stderr, "nncp-caller -- croned NNCP TCP daemon caller\n\n")
  37         fmt.Fprintf(os.Stderr, "Usage: %s [options] [NODE ...]\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                 spoolPath = flag.String("spool", "", "Override path to spool")
  46                 logPath   = flag.String("log", "", "Override path to logfile")
  47                 quiet     = flag.Bool("quiet", false, "Print only errors")
  48                 showPrgrs = flag.Bool("progress", false, "Force progress showing")
  49                 omitPrgrs = flag.Bool("noprogress", false, "Omit progress showing")
  50                 debug     = flag.Bool("debug", false, "Print debug messages")
  51                 version   = flag.Bool("version", false, "Print version information")
  52                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  53
  54                 autoToss = flag.Bool("autotoss", false,
  55                         "Toss after call is finished")
  56                 autoTossDoSeen = flag.Bool("autotoss-seen", false,
  57                         "Create seen/ files during tossing")
  58                 autoTossNoFile = flag.Bool("autotoss-nofile", false,
  59                         "Do not process \"file\" packets during tossing")
  60                 autoTossNoFreq = flag.Bool("autotoss-nofreq", false,
  61                         "Do not process \"freq\" packets during tossing")
  62                 autoTossNoExec = flag.Bool("autotoss-noexec", false,
  63                         "Do not process \"exec\" packets during tossing")
  64                 autoTossNoTrns = flag.Bool("autotoss-notrns", false,
  65                         "Do not process \"trns\" packets during tossing")
  66                 autoTossNoArea = flag.Bool("autotoss-noarea", false,
  67                         "Do not process \"area\" packets during tossing")
  68                 autoTossNoACK = flag.Bool("autotoss-noack", false,
  69                         "Do not process \"ack\" packets during tossing")
  70         )
  71         log.SetFlags(log.Lshortfile)
  72         flag.Usage = usage
  73         flag.Parse()
  74         if *warranty {
  75                 fmt.Println(nncp.Warranty)
  76                 return
  77         }
  78         if *version {
  79                 fmt.Println(nncp.VersionGet())
  80                 return
  81         }
  82
  83         ctx, err := nncp.CtxFromCmdline(
  84                 *cfgPath,
  85                 *spoolPath,
  86                 *logPath,
  87                 *quiet,
  88                 *showPrgrs,
  89                 *omitPrgrs,
  90                 *debug,
  91         )
  92         if err != nil {
  93                 log.Fatalln("Error during initialization:", err)
  94         }
  95         if ctx.Self == nil {
  96                 log.Fatalln("Config lacks private keys")
  97         }
  98         ctx.Umask()
  99
 100         var nodes []*nncp.Node
 101         if flag.NArg() > 0 {
 102                 for _, nodeId := range flag.Args() {
 103                         node, err := ctx.FindNode(nodeId)
 104                         if err != nil {
 105                                 log.Fatalln("Invalid NODE specified:", err)
 106                         }
 107                         if node.NoisePub == nil {
 108                                 log.Fatalln("Node", nodeId, "does not have online communication capability")
 109                         }
 110                         if len(node.Calls) == 0 {
 111                                 ctx.LogD(
 112                                         "caller-no-calls",
 113                                         nncp.LEs{{K: "Node", V: node.Id}},
 114                                         func(les nncp.LEs) string {
 115                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 116                                         },
 117                                 )
 118                                 continue
 119                         }
 120                         nodes = append(nodes, node)
 121                 }
 122         } else {
 123                 for _, node := range ctx.Neigh {
 124                         if len(node.Calls) == 0 {
 125                                 ctx.LogD(
 126                                         "caller-no-calls",
 127                                         nncp.LEs{{K: "Node", V: node.Id}},
 128                                         func(les nncp.LEs) string {
 129                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 130                                         },
 131                                 )
 132                                 continue
 133                         }
 134                         nodes = append(nodes, node)
 135                 }
 136         }
 137
 138         ifis, err := net.Interfaces()
 139         if err != nil {
 140                 log.Fatalln("Can not get network interfaces list:", err)
 141         }
 142         for _, ifiReString := range ctx.MCDRxIfis {
 143                 ifiRe, err := regexp.CompilePOSIX(ifiReString)
 144                 if err != nil {
 145                         log.Fatalf("Can not compile POSIX regexp \"%s\": %s", ifiReString, err)
 146                 }
 147                 for _, ifi := range ifis {
 148                         if ifiRe.MatchString(ifi.Name) {
 149                                 if err = ctx.MCDRx(ifi.Name); err != nil {
 150                                         log.Printf("Can not run MCD reception on %s: %s", ifi.Name, err)
 151                                 }
 152                         }
 153                 }
 154         }
 155
 156         var wg sync.WaitGroup
 157         for _, node := range nodes {
 158                 for i, call := range node.Calls {
 159                         wg.Add(1)
 160                         go func(node *nncp.Node, i int, call *nncp.Call) {
 161                                 defer wg.Done()
 162                                 var addrsFromCfg []string
 163                                 if call.Addr == nil {
 164                                         for _, addr := range node.Addrs {
 165                                                 addrsFromCfg = append(addrsFromCfg, addr)
 166                                         }
 167                                 } else {
 168                                         addrsFromCfg = append(addrsFromCfg, *call.Addr)
 169                                 }
 170                                 les := nncp.LEs{{K: "Node", V: node.Id}, {K: "CallIndex", V: i}}
 171                                 logMsg := func(les nncp.LEs) string {
 172                                         return fmt.Sprintf("%s node, call %d", node.Name, i)
 173                                 }
 174                                 for {
 175                                         n := time.Now()
 176                                         t := call.Cron.Next(n)
 177                                         ctx.LogD("caller-time", les, func(les nncp.LEs) string {
 178                                                 return logMsg(les) + ": " + t.String()
 179                                         })
 180                                         if t.IsZero() {
 181                                                 ctx.LogE("caller", les, errors.New("got zero time"), logMsg)
 182                                                 return
 183                                         }
 184                                         time.Sleep(t.Sub(n))
 185                                         node.Lock()
 186                                         if node.Busy {
 187                                                 node.Unlock()
 188                                                 ctx.LogD("caller-busy", les, func(les nncp.LEs) string {
 189                                                         return logMsg(les) + ": busy"
 190                                                 })
 191                                                 continue
 192                                         } else {
 193                                                 node.Busy = true
 194                                                 node.Unlock()
 195
 196                                                 if call.WhenTxExists && call.Xx != "TRx" {
 197                                                         ctx.LogD("caller", les, func(les nncp.LEs) string {
 198                                                                 return logMsg(les) + ": checking tx existence"
 199                                                         })
 200                                                         txExists := false
 201                                                         for job := range ctx.Jobs(node.Id, nncp.TTx) {
 202                                                                 if job.PktEnc.Nice > call.Nice {
 203                                                                         continue
 204                                                                 }
 205                                                                 txExists = true
 206                                                         }
 207                                                         if !txExists {
 208                                                                 ctx.LogD("caller-no-tx", les, func(les nncp.LEs) string {
 209                                                                         return logMsg(les) + ": no tx"
 210                                                                 })
 211                                                                 node.Lock()
 212                                                                 node.Busy = false
 213                                                                 node.Unlock()
 214                                                                 continue
 215                                                         }
 216                                                 }
 217
 218                                                 var autoTossFinish chan struct{}
 219                                                 var autoTossBadCode chan bool
 220                                                 if call.AutoToss || *autoToss {
 221                                                         autoTossFinish, autoTossBadCode = ctx.AutoToss(
 222                                                                 node.Id,
 223                                                                 &nncp.TossOpts{
 224                                                                         Nice:   call.Nice,
 225                                                                         DoSeen: call.AutoTossDoSeen || *autoTossDoSeen,
 226                                                                         NoFile: call.AutoTossNoFile || *autoTossNoFile,
 227                                                                         NoFreq: call.AutoTossNoFreq || *autoTossNoFreq,
 228                                                                         NoExec: call.AutoTossNoExec || *autoTossNoExec,
 229                                                                         NoTrns: call.AutoTossNoTrns || *autoTossNoTrns,
 230                                                                         NoArea: call.AutoTossNoArea || *autoTossNoArea,
 231                                                                         NoACK:  call.AutoTossNoACK || *autoTossNoACK,
 232                                                                 },
 233                                                         )
 234                                                 }
 235
 236                                                 var addrs []string
 237                                                 if !call.MCDIgnore {
 238                                                         nncp.MCDAddrsM.RLock()
 239                                                         for _, mcdAddr := range nncp.MCDAddrs[*node.Id] {
 240                                                                 ctx.LogD("caller", les, func(les nncp.LEs) string {
 241                                                                         return logMsg(les) + ": adding MCD address: " +
 242                                                                                 mcdAddr.Addr.String()
 243                                                                 })
 244                                                                 addrs = append(addrs, mcdAddr.Addr.String())
 245                                                         }
 246                                                         nncp.MCDAddrsM.RUnlock()
 247                                                 }
 248
 249                                                 ctx.CallNode(
 250                                                         node,
 251                                                         append(addrs, addrsFromCfg...),
 252                                                         call.Nice,
 253                                                         call.Xx,
 254                                                         call.RxRate,
 255                                                         call.TxRate,
 256                                                         call.OnlineDeadline,
 257                                                         call.MaxOnlineTime,
 258                                                         false,
 259                                                         call.NoCK,
 260                                                         nil,
 261                                                 )
 262
 263                                                 if call.AutoToss || *autoToss {
 264                                                         close(autoTossFinish)
 265                                                         <-autoTossBadCode
 266                                                 }
 267
 268                                                 node.Lock()
 269                                                 node.Busy = false
 270                                                 node.Unlock()
 271                                         }
 272                                 }
 273                         }(node, i, call)
 274                 }
 275         }
 276         wg.Wait()
 277         nncp.SPCheckerWg.Wait()
 278 }