src/cmd/nncp-caller/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2019 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         flag.Usage = usage
  54         flag.Parse()
  55         if *warranty {
  56                 fmt.Println(nncp.Warranty)
  57                 return
  58         }
  59         if *version {
  60                 fmt.Println(nncp.VersionGet())
  61                 return
  62         }
  63
  64         ctx, err := nncp.CtxFromCmdline(
  65                 *cfgPath,
  66                 *spoolPath,
  67                 *logPath,
  68                 *quiet,
  69                 *showPrgrs,
  70                 *omitPrgrs,
  71                 *debug,
  72         )
  73         if err != nil {
  74                 log.Fatalln("Error during initialization:", err)
  75         }
  76         if ctx.Self == nil {
  77                 log.Fatalln("Config lacks private keys")
  78         }
  79         ctx.Umask()
  80
  81         var nodes []*nncp.Node
  82         if flag.NArg() > 0 {
  83                 for _, nodeId := range flag.Args() {
  84                         node, err := ctx.FindNode(nodeId)
  85                         if err != nil {
  86                                 log.Fatalln("Invalid NODE specified:", err)
  87                         }
  88                         if len(node.Calls) == 0 {
  89                                 ctx.LogD("caller", nncp.SDS{"node": node.Id}, "has no calls, skipping")
  90                                 continue
  91                         }
  92                         nodes = append(nodes, node)
  93                 }
  94         } else {
  95                 for _, node := range ctx.Neigh {
  96                         if len(node.Calls) == 0 {
  97                                 ctx.LogD("caller", nncp.SDS{"node": node.Id}, "has no calls, skipping")
  98                                 continue
  99                         }
 100                         nodes = append(nodes, node)
 101                 }
 102         }
 103
 104         var wg sync.WaitGroup
 105         for _, node := range nodes {
 106                 for i, call := range node.Calls {
 107                         wg.Add(1)
 108                         go func(node *nncp.Node, i int, call *nncp.Call) {
 109                                 defer wg.Done()
 110                                 var addrs []string
 111                                 if call.Addr == nil {
 112                                         for _, addr := range node.Addrs {
 113                                                 addrs = append(addrs, addr)
 114                                         }
 115                                 } else {
 116                                         addrs = append(addrs, *call.Addr)
 117                                 }
 118                                 sds := nncp.SDS{"node": node.Id, "callindex": i}
 119                                 for {
 120                                         n := time.Now()
 121                                         t := call.Cron.Next(n)
 122                                         ctx.LogD("caller", sds, t.String())
 123                                         if t.IsZero() {
 124                                                 ctx.LogE("caller", sds, errors.New("got zero time"), "")
 125                                                 return
 126                                         }
 127                                         time.Sleep(t.Sub(n))
 128                                         node.Lock()
 129                                         if node.Busy {
 130                                                 node.Unlock()
 131                                                 ctx.LogD("caller", sds, "busy")
 132                                                 continue
 133                                         } else {
 134                                                 node.Busy = true
 135                                                 node.Unlock()
 136                                                 ctx.CallNode(
 137                                                         node,
 138                                                         addrs,
 139                                                         call.Nice,
 140                                                         call.Xx,
 141                                                         call.RxRate,
 142                                                         call.TxRate,
 143                                                         call.OnlineDeadline,
 144                                                         call.MaxOnlineTime,
 145                                                         false,
 146                                                         nil,
 147                                                 )
 148                                                 node.Lock()
 149                                                 node.Busy = false
 150                                                 node.Unlock()
 151                                         }
 152                                 }
 153                         }(node, i, call)
 154                 }
 155         }
 156         wg.Wait()
 157 }