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/v5"
  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("caller", nncp.SDS{"node": node.Id}, "has no calls, skipping")
  97                                 continue
  98                         }
  99                         nodes = append(nodes, node)
 100                 }
 101         } else {
 102                 for _, node := range ctx.Neigh {
 103                         if len(node.Calls) == 0 {
 104                                 ctx.LogD("caller", nncp.SDS{"node": node.Id}, "has no calls, skipping")
 105                                 continue
 106                         }
 107                         nodes = append(nodes, node)
 108                 }
 109         }
 110
 111         var wg sync.WaitGroup
 112         for _, node := range nodes {
 113                 for i, call := range node.Calls {
 114                         wg.Add(1)
 115                         go func(node *nncp.Node, i int, call *nncp.Call) {
 116                                 defer wg.Done()
 117                                 var addrs []string
 118                                 if call.Addr == nil {
 119                                         for _, addr := range node.Addrs {
 120                                                 addrs = append(addrs, addr)
 121                                         }
 122                                 } else {
 123                                         addrs = append(addrs, *call.Addr)
 124                                 }
 125                                 sds := nncp.SDS{"node": node.Id, "callindex": i}
 126                                 for {
 127                                         n := time.Now()
 128                                         t := call.Cron.Next(n)
 129                                         ctx.LogD("caller", sds, t.String())
 130                                         if t.IsZero() {
 131                                                 ctx.LogE("caller", sds, errors.New("got zero time"), "")
 132                                                 return
 133                                         }
 134                                         time.Sleep(t.Sub(n))
 135                                         node.Lock()
 136                                         if node.Busy {
 137                                                 node.Unlock()
 138                                                 ctx.LogD("caller", sds, "busy")
 139                                                 continue
 140                                         } else {
 141                                                 node.Busy = true
 142                                                 node.Unlock()
 143                                                 ctx.CallNode(
 144                                                         node,
 145                                                         addrs,
 146                                                         call.Nice,
 147                                                         call.Xx,
 148                                                         call.RxRate,
 149                                                         call.TxRate,
 150                                                         call.OnlineDeadline,
 151                                                         call.MaxOnlineTime,
 152                                                         false,
 153                                                         nil,
 154                                                 )
 155                                                 if *autotoss {
 156                                                         ctx.Toss(
 157                                                                 node.Id,
 158                                                                 call.Nice,
 159                                                                 false,
 160                                                                 *autotossDoSeen,
 161                                                                 *autotossNoFile,
 162                                                                 *autotossNoFreq,
 163                                                                 *autotossNoExec,
 164                                                                 *autotossNoTrns,
 165                                                         )
 166                                                 }
 167
 168                                                 node.Lock()
 169                                                 node.Busy = false
 170                                                 node.Unlock()
 171                                         }
 172                                 }
 173                         }(node, i, call)
 174                 }
 175         }
 176         wg.Wait()
 177 }