src/jobs.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 package nncp
  19
  20 import (
  21         "os"
  22         "path/filepath"
  23
  24         xdr "github.com/davecgh/go-xdr/xdr2"
  25 )
  26
  27 type TRxTx string
  28
  29 const (
  30         TRx TRxTx = "rx"
  31         TTx TRxTx = "tx"
  32 )
  33
  34 type Job struct {
  35         PktEnc   *PktEnc
  36         Path     string
  37         Size     int64
  38         HshValue *[32]byte
  39 }
  40
  41 func (ctx *Ctx) Jobs(nodeId *NodeId, xx TRxTx) chan Job {
  42         rxPath := filepath.Join(ctx.Spool, nodeId.String(), string(xx))
  43         jobs := make(chan Job, 16)
  44         go func() {
  45                 defer close(jobs)
  46                 dir, err := os.Open(rxPath)
  47                 if err != nil {
  48                         return
  49                 }
  50                 fis, err := dir.Readdir(0)
  51                 dir.Close() // #nosec G104
  52                 if err != nil {
  53                         return
  54                 }
  55                 for _, fi := range fis {
  56                         hshValue, err := Base32Codec.DecodeString(fi.Name())
  57                         if err != nil {
  58                                 continue
  59                         }
  60                         pth := filepath.Join(rxPath, fi.Name())
  61                         fd, err := os.Open(pth)
  62                         if err != nil {
  63                                 continue
  64                         }
  65                         var pktEnc PktEnc
  66                         _, err = xdr.Unmarshal(fd, &pktEnc)
  67                         fd.Close()
  68                         if err != nil || pktEnc.Magic != MagicNNCPEv4 {
  69                                 continue
  70                         }
  71                         ctx.LogD("jobs", LEs{
  72                                 {"XX", string(xx)},
  73                                 {"Node", pktEnc.Sender},
  74                                 {"Name", fi.Name()},
  75                                 {"Nice", int(pktEnc.Nice)},
  76                                 {"Size", fi.Size()},
  77                         }, "taken")
  78                         job := Job{
  79                                 PktEnc:   &pktEnc,
  80                                 Path:     pth,
  81                                 Size:     fi.Size(),
  82                                 HshValue: new([32]byte),
  83                         }
  84                         copy(job.HshValue[:], hshValue)
  85                         jobs <- job
  86                 }
  87         }()
  88         return jobs
  89 }