src/cmd/nncp-caller/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2021 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         "os"
  27         "sync"
  28         "time"
  29
  30         "go.cypherpunks.ru/nncp/v7"
  31 )
  32
  33 func usage() {
  34         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  35         fmt.Fprintf(os.Stderr, "nncp-caller -- croned NNCP TCP daemon caller\n\n")
  36         fmt.Fprintf(os.Stderr, "Usage: %s [options] [NODE ...]\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                 spoolPath = flag.String("spool", "", "Override path to spool")
  45                 logPath   = flag.String("log", "", "Override path to logfile")
  46                 quiet     = flag.Bool("quiet", false, "Print only errors")
  47                 showPrgrs = flag.Bool("progress", false, "Force progress showing")
  48                 omitPrgrs = flag.Bool("noprogress", false, "Omit progress showing")
  49                 debug     = flag.Bool("debug", false, "Print debug messages")
  50                 version   = flag.Bool("version", false, "Print version information")
  51                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  52
  53                 autoToss       = flag.Bool("autotoss", false, "Toss after call is finished")
  54                 autoTossDoSeen = flag.Bool("autotoss-seen", false, "Create .seen files during tossing")
  55                 autoTossNoFile = flag.Bool("autotoss-nofile", false, "Do not process \"file\" packets during tossing")
  56                 autoTossNoFreq = flag.Bool("autotoss-nofreq", false, "Do not process \"freq\" packets during tossing")
  57                 autoTossNoExec = flag.Bool("autotoss-noexec", false, "Do not process \"exec\" packets during tossing")
  58                 autoTossNoTrns = flag.Bool("autotoss-notrns", false, "Do not process \"trns\" packets during tossing")
  59         )
  60         log.SetFlags(log.Lshortfile)
  61         flag.Usage = usage
  62         flag.Parse()
  63         if *warranty {
  64                 fmt.Println(nncp.Warranty)
  65                 return
  66         }
  67         if *version {
  68                 fmt.Println(nncp.VersionGet())
  69                 return
  70         }
  71
  72         ctx, err := nncp.CtxFromCmdline(
  73                 *cfgPath,
  74                 *spoolPath,
  75                 *logPath,
  76                 *quiet,
  77                 *showPrgrs,
  78                 *omitPrgrs,
  79                 *debug,
  80         )
  81         if err != nil {
  82                 log.Fatalln("Error during initialization:", err)
  83         }
  84         if ctx.Self == nil {
  85                 log.Fatalln("Config lacks private keys")
  86         }
  87         ctx.Umask()
  88
  89         var nodes []*nncp.Node
  90         if flag.NArg() > 0 {
  91                 for _, nodeId := range flag.Args() {
  92                         node, err := ctx.FindNode(nodeId)
  93                         if err != nil {
  94                                 log.Fatalln("Invalid NODE specified:", err)
  95                         }
  96                         if len(node.Calls) == 0 {
  97                                 ctx.LogD(
  98                                         "caller-no-calls",
  99                                         nncp.LEs{{K: "Node", V: node.Id}},
 100                                         func(les nncp.LEs) string {
 101                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 102                                         },
 103                                 )
 104                                 continue
 105                         }
 106                         nodes = append(nodes, node)
 107                 }
 108         } else {
 109                 for _, node := range ctx.Neigh {
 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         }
 123
 124         for _, ifiName := range ctx.MCDRxIfis {
 125                 if err = ctx.MCDRx(ifiName); err != nil {
 126                         log.Fatalln("Can not run MCD reception:", err)
 127                 }
 128         }
 129
 130         var wg sync.WaitGroup
 131         for _, node := range nodes {
 132                 for i, call := range node.Calls {
 133                         wg.Add(1)
 134                         go func(node *nncp.Node, i int, call *nncp.Call) {
 135                                 defer wg.Done()
 136                                 var addrsFromCfg []string
 137                                 if call.Addr == nil {
 138                                         for _, addr := range node.Addrs {
 139                                                 addrsFromCfg = append(addrsFromCfg, addr)
 140                                         }
 141                                 } else {
 142                                         addrsFromCfg = append(addrsFromCfg, *call.Addr)
 143                                 }
 144                                 les := nncp.LEs{{K: "Node", V: node.Id}, {K: "CallIndex", V: i}}
 145                                 logMsg := func(les nncp.LEs) string {
 146                                         return fmt.Sprintf("%s node, call %d", node.Name, i)
 147                                 }
 148                                 for {
 149                                         n := time.Now()
 150                                         t := call.Cron.Next(n)
 151                                         ctx.LogD("caller-time", les, func(les nncp.LEs) string {
 152                                                 return logMsg(les) + ": " + t.String()
 153                                         })
 154                                         if t.IsZero() {
 155                                                 ctx.LogE("caller", les, errors.New("got zero time"), logMsg)
 156                                                 return
 157                                         }
 158                                         time.Sleep(t.Sub(n))
 159                                         node.Lock()
 160                                         if node.Busy {
 161                                                 node.Unlock()
 162                                                 ctx.LogD("caller-busy", les, func(les nncp.LEs) string {
 163                                                         return logMsg(les) + ": busy"
 164                                                 })
 165                                                 continue
 166                                         } else {
 167                                                 node.Busy = true
 168                                                 node.Unlock()
 169
 170                                                 if call.WhenTxExists && call.Xx != "TRx" {
 171                                                         ctx.LogD("caller", les, func(les nncp.LEs) string {
 172                                                                 return logMsg(les) + ": checking tx existence"
 173                                                         })
 174                                                         txExists := false
 175                                                         for job := range ctx.Jobs(node.Id, nncp.TTx) {
 176                                                                 if job.PktEnc.Nice > call.Nice {
 177                                                                         continue
 178                                                                 }
 179                                                                 txExists = true
 180                                                         }
 181                                                         if !txExists {
 182                                                                 ctx.LogD("caller-no-tx", les, func(les nncp.LEs) string {
 183                                                                         return logMsg(les) + ": no tx"
 184                                                                 })
 185                                                                 node.Lock()
 186                                                                 node.Busy = false
 187                                                                 node.Unlock()
 188                                                                 continue
 189                                                         }
 190                                                 }
 191
 192                                                 var autoTossFinish chan struct{}
 193                                                 var autoTossBadCode chan bool
 194                                                 if call.AutoToss || *autoToss {
 195                                                         autoTossFinish, autoTossBadCode = ctx.AutoToss(
 196                                                                 node.Id,
 197                                                                 call.Nice,
 198                                                                 call.AutoTossDoSeen || *autoTossDoSeen,
 199                                                                 call.AutoTossNoFile || *autoTossNoFile,
 200                                                                 call.AutoTossNoFreq || *autoTossNoFreq,
 201                                                                 call.AutoTossNoExec || *autoTossNoExec,
 202                                                                 call.AutoTossNoTrns || *autoTossNoTrns,
 203                                                         )
 204                                                 }
 205
 206                                                 var addrs []string
 207                                                 if !call.MCDIgnore {
 208                                                         nncp.MCDAddrsM.RLock()
 209                                                         for _, mcdAddr := range nncp.MCDAddrs[*node.Id] {
 210                                                                 ctx.LogD("caller", les, func(les nncp.LEs) string {
 211                                                                         return logMsg(les) + ": adding MCD address: " +
 212                                                                                 mcdAddr.Addr.String()
 213                                                                 })
 214                                                                 addrs = append(addrs, mcdAddr.Addr.String())
 215                                                         }
 216                                                         nncp.MCDAddrsM.RUnlock()
 217                                                 }
 218
 219                                                 ctx.CallNode(
 220                                                         node,
 221                                                         append(addrs, addrsFromCfg...),
 222                                                         call.Nice,
 223                                                         call.Xx,
 224                                                         call.RxRate,
 225                                                         call.TxRate,
 226                                                         call.OnlineDeadline,
 227                                                         call.MaxOnlineTime,
 228                                                         false,
 229                                                         call.NoCK,
 230                                                         nil,
 231                                                 )
 232
 233                                                 if call.AutoToss || *autoToss {
 234                                                         close(autoTossFinish)
 235                                                         <-autoTossBadCode
 236                                                 }
 237
 238                                                 node.Lock()
 239                                                 node.Busy = false
 240                                                 node.Unlock()
 241                                         }
 242                                 }
 243                         }(node, i, call)
 244                 }
 245         }
 246         wg.Wait()
 247         nncp.SPCheckerWg.Wait()
 248 }