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         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(
  90                                         "caller-no-calls",
  91                                         nncp.LEs{{K: "Node", V: node.Id}},
  92                                         func(les nncp.LEs) string {
  93                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
  94                                         },
  95                                 )
  96                                 continue
  97                         }
  98                         nodes = append(nodes, node)
  99                 }
 100         } else {
 101                 for _, node := range ctx.Neigh {
 102                         if len(node.Calls) == 0 {
 103                                 ctx.LogD(
 104                                         "caller-no-calls",
 105                                         nncp.LEs{{K: "Node", V: node.Id}},
 106                                         func(les nncp.LEs) string {
 107                                                 return fmt.Sprintf("%s node has no calls, skipping", node.Name)
 108                                         },
 109                                 )
 110                                 continue
 111                         }
 112                         nodes = append(nodes, node)
 113                 }
 114         }
 115
 116         var wg sync.WaitGroup
 117         for _, node := range nodes {
 118                 for i, call := range node.Calls {
 119                         wg.Add(1)
 120                         go func(node *nncp.Node, i int, call *nncp.Call) {
 121                                 defer wg.Done()
 122                                 var addrs []string
 123                                 if call.Addr == nil {
 124                                         for _, addr := range node.Addrs {
 125                                                 addrs = append(addrs, addr)
 126                                         }
 127                                 } else {
 128                                         addrs = append(addrs, *call.Addr)
 129                                 }
 130                                 les := nncp.LEs{{K: "Node", V: node.Id}, {K: "CallIndex", V: i}}
 131                                 logMsg := func(les nncp.LEs) string {
 132                                         return fmt.Sprintf("%s node, call %d", node.Name, i)
 133                                 }
 134                                 for {
 135                                         n := time.Now()
 136                                         t := call.Cron.Next(n)
 137                                         ctx.LogD("caller-time", les, func(les nncp.LEs) string {
 138                                                 return logMsg(les) + ": " + t.String()
 139                                         })
 140                                         if t.IsZero() {
 141                                                 ctx.LogE("caller", les, errors.New("got zero time"), logMsg)
 142                                                 return
 143                                         }
 144                                         time.Sleep(t.Sub(n))
 145                                         node.Lock()
 146                                         if node.Busy {
 147                                                 node.Unlock()
 148                                                 ctx.LogD("caller-busy", les, func(les nncp.LEs) string {
 149                                                         return logMsg(les) + ": busy"
 150                                                 })
 151                                                 continue
 152                                         } else {
 153                                                 node.Busy = true
 154                                                 node.Unlock()
 155
 156                                                 if call.WhenTxExists && call.Xx != "TRx" {
 157                                                         ctx.LogD("caller", les, func(les nncp.LEs) string {
 158                                                                 return logMsg(les) + ": checking tx existence"
 159                                                         })
 160                                                         txExists := false
 161                                                         for job := range ctx.Jobs(node.Id, nncp.TTx) {
 162                                                                 if job.PktEnc.Nice > call.Nice {
 163                                                                         continue
 164                                                                 }
 165                                                                 txExists = true
 166                                                         }
 167                                                         if !txExists {
 168                                                                 ctx.LogD("caller-no-tx", les, func(les nncp.LEs) string {
 169                                                                         return logMsg(les) + ": no tx"
 170                                                                 })
 171                                                                 node.Lock()
 172                                                                 node.Busy = false
 173                                                                 node.Unlock()
 174                                                                 continue
 175                                                         }
 176                                                 }
 177
 178                                                 var autoTossFinish chan struct{}
 179                                                 var autoTossBadCode chan bool
 180                                                 if call.AutoToss {
 181                                                         autoTossFinish, autoTossBadCode = ctx.AutoToss(
 182                                                                 node.Id,
 183                                                                 call.Nice,
 184                                                                 call.AutoTossDoSeen,
 185                                                                 call.AutoTossNoFile,
 186                                                                 call.AutoTossNoFreq,
 187                                                                 call.AutoTossNoExec,
 188                                                                 call.AutoTossNoTrns,
 189                                                         )
 190                                                 }
 191
 192                                                 ctx.CallNode(
 193                                                         node,
 194                                                         addrs,
 195                                                         call.Nice,
 196                                                         call.Xx,
 197                                                         call.RxRate,
 198                                                         call.TxRate,
 199                                                         call.OnlineDeadline,
 200                                                         call.MaxOnlineTime,
 201                                                         false,
 202                                                         call.NoCK,
 203                                                         nil,
 204                                                 )
 205
 206                                                 if call.AutoToss {
 207                                                         close(autoTossFinish)
 208                                                         <-autoTossBadCode
 209                                                 }
 210
 211                                                 node.Lock()
 212                                                 node.Busy = false
 213                                                 node.Unlock()
 214                                         }
 215                                 }
 216                         }(node, i, call)
 217                 }
 218         }
 219         wg.Wait()
 220 }