src/cypherpunks.ru/nncp/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, either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 // Croned NNCP TCP daemon caller.
  20 package main
  21
  22 import (
  23         "flag"
  24         "fmt"
  25         "log"
  26         "os"
  27         "strconv"
  28         "sync"
  29         "time"
  30
  31         "cypherpunks.ru/nncp"
  32 )
  33
  34 func usage() {
  35         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  36         fmt.Fprintf(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                 debug     = flag.Bool("debug", false, "Print debug messages")
  49                 version   = flag.Bool("version", false, "Print version information")
  50                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  51         )
  52         flag.Usage = usage
  53         flag.Parse()
  54         if *warranty {
  55                 fmt.Println(nncp.Warranty)
  56                 return
  57         }
  58         if *version {
  59                 fmt.Println(nncp.VersionGet())
  60                 return
  61         }
  62
  63         ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, *logPath, *quiet, *debug)
  64         if err != nil {
  65                 log.Fatalln("Error during initialization:", err)
  66         }
  67         if ctx.Self == nil {
  68                 log.Fatalln("Config lacks private keys")
  69         }
  70
  71         var nodes []*nncp.Node
  72         if flag.NArg() > 0 {
  73                 for _, nodeId := range flag.Args() {
  74                         node, err := ctx.FindNode(nodeId)
  75                         if err != nil {
  76                                 log.Fatalln("Invalid NODE specified:", err)
  77                         }
  78                         if len(node.Calls) == 0 {
  79                                 ctx.LogD("caller", nncp.SDS{"node": node.Id}, "has no calls, skipping")
  80                                 continue
  81                         }
  82                         nodes = append(nodes, node)
  83                 }
  84         } else {
  85                 for _, node := range ctx.Neigh {
  86                         if len(node.Calls) == 0 {
  87                                 ctx.LogD("caller", nncp.SDS{"node": node.Id}, "has no calls, skipping")
  88                                 continue
  89                         }
  90                         nodes = append(nodes, node)
  91                 }
  92         }
  93
  94         var wg sync.WaitGroup
  95         for _, node := range nodes {
  96                 for i, call := range node.Calls {
  97                         wg.Add(1)
  98                         go func(node *nncp.Node, i int, call *nncp.Call) {
  99                                 defer wg.Done()
 100                                 var addrs []string
 101                                 if call.Addr == nil {
 102                                         for _, addr := range node.Addrs {
 103                                                 addrs = append(addrs, addr)
 104                                         }
 105                                 } else {
 106                                         addrs = append(addrs, *call.Addr)
 107                                 }
 108                                 sds := nncp.SDS{"node": node.Id, "callindex": strconv.Itoa(i)}
 109                                 for {
 110                                         n := time.Now()
 111                                         t := call.Cron.Next(n)
 112                                         ctx.LogD("caller", sds, t.String())
 113                                         if t.IsZero() {
 114                                                 ctx.LogE("caller", sds, "got zero time")
 115                                                 return
 116                                         }
 117                                         time.Sleep(t.Sub(n))
 118                                         node.Lock()
 119                                         if node.Busy {
 120                                                 node.Unlock()
 121                                                 ctx.LogD("caller", sds, "busy")
 122                                                 continue
 123                                         } else {
 124                                                 node.Busy = true
 125                                                 node.Unlock()
 126                                                 ctx.CallNode(
 127                                                         node,
 128                                                         addrs,
 129                                                         call.Nice,
 130                                                         call.Xx,
 131                                                         call.RxRate,
 132                                                         call.TxRate,
 133                                                         call.OnlineDeadline,
 134                                                         call.MaxOnlineTime,
 135                                                         false,
 136                                                         nil,
 137                                                 )
 138                                                 node.Lock()
 139                                                 node.Busy = false
 140                                                 node.Unlock()
 141                                         }
 142                                 }
 143                         }(node, i, call)
 144                 }
 145         }
 146         wg.Wait()
 147 }