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         "strings"
  24
  25         xdr "github.com/davecgh/go-xdr/xdr2"
  26 )
  27
  28 type TRxTx string
  29
  30 const (
  31         TRx TRxTx = "rx"
  32         TTx TRxTx = "tx"
  33 )
  34
  35 type Job struct {
  36         PktEnc   *PktEnc
  37         Path     string
  38         Size     int64
  39         HshValue *[32]byte
  40 }
  41
  42 func (ctx *Ctx) jobsFind(nodeId *NodeId, xx TRxTx, nock bool) chan Job {
  43         rxPath := filepath.Join(ctx.Spool, nodeId.String(), string(xx))
  44         jobs := make(chan Job, 16)
  45         go func() {
  46                 defer close(jobs)
  47                 dir, err := os.Open(rxPath)
  48                 if err != nil {
  49                         return
  50                 }
  51                 fis, err := dir.Readdir(0)
  52                 dir.Close() // #nosec G104
  53                 if err != nil {
  54                         return
  55                 }
  56                 for _, fi := range fis {
  57                         var hshValue []byte
  58                         if nock {
  59                                 if !strings.HasSuffix(fi.Name(), NoCKSuffix) {
  60                                         continue
  61                                 }
  62                                 hshValue, err = Base32Codec.DecodeString(
  63                                         strings.TrimSuffix(fi.Name(), NoCKSuffix),
  64                                 )
  65                         } else {
  66                                 hshValue, err = Base32Codec.DecodeString(fi.Name())
  67                         }
  68                         if err != nil {
  69                                 continue
  70                         }
  71                         pth := filepath.Join(rxPath, fi.Name())
  72                         fd, err := os.Open(pth)
  73                         if err != nil {
  74                                 continue
  75                         }
  76                         var pktEnc PktEnc
  77                         _, err = xdr.Unmarshal(fd, &pktEnc)
  78                         fd.Close()
  79                         if err != nil || pktEnc.Magic != MagicNNCPEv4 {
  80                                 continue
  81                         }
  82                         ctx.LogD("jobs", LEs{
  83                                 {"XX", string(xx)},
  84                                 {"Node", pktEnc.Sender},
  85                                 {"Name", fi.Name()},
  86                                 {"Nice", int(pktEnc.Nice)},
  87                                 {"Size", fi.Size()},
  88                         }, "taken")
  89                         job := Job{
  90                                 PktEnc:   &pktEnc,
  91                                 Path:     pth,
  92                                 Size:     fi.Size(),
  93                                 HshValue: new([32]byte),
  94                         }
  95                         copy(job.HshValue[:], hshValue)
  96                         jobs <- job
  97                 }
  98         }()
  99         return jobs
 100 }
 101
 102 func (ctx *Ctx) Jobs(nodeId *NodeId, xx TRxTx) chan Job {
 103         return ctx.jobsFind(nodeId, xx, false)
 104 }
 105
 106 func (ctx *Ctx) JobsNoCK(nodeId *NodeId) chan Job {
 107         return ctx.jobsFind(nodeId, TRx, true)
 108 }