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/v6"
  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         flag.Usage = usage
  61         flag.Parse()
  62         if *warranty {
  63                 fmt.Println(nncp.Warranty)
  64                 return
  65         }
  66         if *version {
  67                 fmt.Println(nncp.VersionGet())
  68                 return
  69         }
  70
  71         ctx, err := nncp.CtxFromCmdline(
  72                 *cfgPath,
  73                 *spoolPath,
  74                 *logPath,
  75                 *quiet,
  76                 *showPrgrs,
  77                 *omitPrgrs,
  78                 *debug,
  79         )
  80         if err != nil {
  81                 log.Fatalln("Error during initialization:", err)
  82         }
  83         if ctx.Self == nil {
  84                 log.Fatalln("Config lacks private keys")
  85         }
  86         ctx.Umask()
  87
  88         var nodes []*nncp.Node
  89         if flag.NArg() > 0 {
  90                 for _, nodeId := range flag.Args() {
  91                         node, err := ctx.FindNode(nodeId)
  92                         if err != nil {
  93                                 log.Fatalln("Invalid NODE specified:", err)
  94                         }
  95                         if len(node.Calls) == 0 {
  96                                 ctx.LogD(
  97                                         "caller-no-calls",
  98                                         nncp.LEs{{K: "Node", V: node.Id}},
  99                                         func(les nncp.LEs) string {
 100                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 101                                         },
 102                                 )
 103                                 continue
 104                         }
 105                         nodes = append(nodes, node)
 106                 }
 107         } else {
 108                 for _, node := range ctx.Neigh {
 109                         if len(node.Calls) == 0 {
 110                                 ctx.LogD(
 111                                         "caller-no-calls",
 112                                         nncp.LEs{{K: "Node", V: node.Id}},
 113                                         func(les nncp.LEs) string {
 114                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 115                                         },
 116                                 )
 117                                 continue
 118                         }
 119                         nodes = append(nodes, node)
 120                 }
 121         }
 122
 123         var wg sync.WaitGroup
 124         for _, node := range nodes {
 125                 for i, call := range node.Calls {
 126                         wg.Add(1)
 127                         go func(node *nncp.Node, i int, call *nncp.Call) {
 128                                 defer wg.Done()
 129                                 var addrs []string
 130                                 if call.Addr == nil {
 131                                         for _, addr := range node.Addrs {
 132                                                 addrs = append(addrs, addr)
 133                                         }
 134                                 } else {
 135                                         addrs = append(addrs, *call.Addr)
 136                                 }
 137                                 les := nncp.LEs{{K: "Node", V: node.Id}, {K: "CallIndex", V: i}}
 138                                 logMsg := func(les nncp.LEs) string {
 139                                         return fmt.Sprintf("%s node, call %d", node.Name, i)
 140                                 }
 141                                 for {
 142                                         n := time.Now()
 143                                         t := call.Cron.Next(n)
 144                                         ctx.LogD("caller-time", les, func(les nncp.LEs) string {
 145                                                 return logMsg(les) + ": " + t.String()
 146                                         })
 147                                         if t.IsZero() {
 148                                                 ctx.LogE("caller", les, errors.New("got zero time"), logMsg)
 149                                                 return
 150                                         }
 151                                         time.Sleep(t.Sub(n))
 152                                         node.Lock()
 153                                         if node.Busy {
 154                                                 node.Unlock()
 155                                                 ctx.LogD("caller-busy", les, func(les nncp.LEs) string {
 156                                                         return logMsg(les) + ": busy"
 157                                                 })
 158                                                 continue
 159                                         } else {
 160                                                 node.Busy = true
 161                                                 node.Unlock()
 162
 163                                                 if call.WhenTxExists && call.Xx != "TRx" {
 164                                                         ctx.LogD("caller", les, func(les nncp.LEs) string {
 165                                                                 return logMsg(les) + ": checking tx existence"
 166                                                         })
 167                                                         txExists := false
 168                                                         for job := range ctx.Jobs(node.Id, nncp.TTx) {
 169                                                                 if job.PktEnc.Nice > call.Nice {
 170                                                                         continue
 171                                                                 }
 172                                                                 txExists = true
 173                                                         }
 174                                                         if !txExists {
 175                                                                 ctx.LogD("caller-no-tx", les, func(les nncp.LEs) string {
 176                                                                         return logMsg(les) + ": no tx"
 177                                                                 })
 178                                                                 node.Lock()
 179                                                                 node.Busy = false
 180                                                                 node.Unlock()
 181                                                                 continue
 182                                                         }
 183                                                 }
 184
 185                                                 var autoTossFinish chan struct{}
 186                                                 var autoTossBadCode chan bool
 187                                                 if call.AutoToss || *autoToss {
 188                                                         autoTossFinish, autoTossBadCode = ctx.AutoToss(
 189                                                                 node.Id,
 190                                                                 call.Nice,
 191                                                                 call.AutoTossDoSeen || *autoTossDoSeen,
 192                                                                 call.AutoTossNoFile || *autoTossNoFile,
 193                                                                 call.AutoTossNoFreq || *autoTossNoFreq,
 194                                                                 call.AutoTossNoExec || *autoTossNoExec,
 195                                                                 call.AutoTossNoTrns || *autoTossNoTrns,
 196                                                         )
 197                                                 }
 198
 199                                                 ctx.CallNode(
 200                                                         node,
 201                                                         addrs,
 202                                                         call.Nice,
 203                                                         call.Xx,
 204                                                         call.RxRate,
 205                                                         call.TxRate,
 206                                                         call.OnlineDeadline,
 207                                                         call.MaxOnlineTime,
 208                                                         false,
 209                                                         call.NoCK,
 210                                                         nil,
 211                                                 )
 212
 213                                                 if call.AutoToss || *autoToss {
 214                                                         close(autoTossFinish)
 215                                                         <-autoTossBadCode
 216                                                 }
 217
 218                                                 node.Lock()
 219                                                 node.Busy = false
 220                                                 node.Unlock()
 221                                         }
 222                                 }
 223                         }(node, i, call)
 224                 }
 225         }
 226         wg.Wait()
 227 }