src/jobs.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 package nncp
  19
  20 import (
  21         "io"
  22         "os"
  23         "path/filepath"
  24         "strconv"
  25
  26         xdr "github.com/davecgh/go-xdr/xdr2"
  27 )
  28
  29 type TRxTx string
  30
  31 const (
  32         TRx TRxTx = "rx"
  33         TTx TRxTx = "tx"
  34 )
  35
  36 type Job struct {
  37         PktEnc   *PktEnc
  38         Fd       *os.File
  39         Size     int64
  40         HshValue *[32]byte
  41 }
  42
  43 func (ctx *Ctx) Jobs(nodeId *NodeId, xx TRxTx) chan Job {
  44         rxPath := filepath.Join(ctx.Spool, nodeId.String(), string(xx))
  45         jobs := make(chan Job, 16)
  46         go func() {
  47                 defer close(jobs)
  48                 dir, err := os.Open(rxPath)
  49                 if err != nil {
  50                         return
  51                 }
  52                 fis, err := dir.Readdir(0)
  53                 dir.Close()
  54                 if err != nil {
  55                         return
  56                 }
  57                 for _, fi := range fis {
  58                         hshValue, err := FromBase32(fi.Name())
  59                         if err != nil {
  60                                 continue
  61                         }
  62                         fd, err := os.Open(filepath.Join(rxPath, fi.Name()))
  63                         if err != nil {
  64                                 continue
  65                         }
  66                         var pktEnc PktEnc
  67                         if _, err = xdr.Unmarshal(fd, &pktEnc); err != nil || pktEnc.Magic != MagicNNCPEv4 {
  68                                 fd.Close()
  69                                 continue
  70                         }
  71                         fd.Seek(0, io.SeekStart)
  72                         ctx.LogD("jobs", SDS{
  73                                 "xx":   string(xx),
  74                                 "node": pktEnc.Sender,
  75                                 "name": fi.Name(),
  76                                 "nice": strconv.Itoa(int(pktEnc.Nice)),
  77                                 "size": strconv.FormatInt(fi.Size(), 10),
  78                         }, "taken")
  79                         job := Job{
  80                                 PktEnc:   &pktEnc,
  81                                 Fd:       fd,
  82                                 Size:     fi.Size(),
  83                                 HshValue: new([32]byte),
  84                         }
  85                         copy(job.HshValue[:], hshValue)
  86                         jobs <- job
  87                 }
  88         }()
  89         return jobs
  90 }