2 NNCP -- Node-to-Node CoPy
3 Copyright (C) 2016-2017 Sergey Matveev <stargrave@stargrave.org>
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.
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.
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/>.
36 "github.com/davecgh/go-xdr/xdr2"
37 "github.com/dustin/go-humanize"
38 "golang.org/x/crypto/blake2b"
39 "golang.org/x/sys/unix"
42 func newNotification(fromTo *FromToYAML, subject string) io.Reader {
43 return strings.NewReader(fmt.Sprintf(
44 "From: %s\nTo: %s\nSubject: %s\n",
47 mime.BEncoding.Encode("UTF-8", subject),
51 func (ctx *Ctx) LockDir(nodeId *NodeId, xx TRxTx) (*os.File, error) {
52 lockPath := filepath.Join(ctx.Spool, nodeId.String(), string(xx)) + ".lock"
53 dirLock, err := os.OpenFile(
55 os.O_CREATE|os.O_WRONLY,
59 ctx.LogE("lockdir", SDS{"path": lockPath, "err": err}, "")
62 err = unix.Flock(int(dirLock.Fd()), unix.LOCK_EX|unix.LOCK_NB)
64 ctx.LogE("lockdir", SDS{"path": lockPath, "err": err}, "")
71 func (ctx *Ctx) UnlockDir(fd *os.File) {
73 unix.Flock(int(fd.Fd()), unix.LOCK_UN)
78 func (ctx *Ctx) Toss(nodeId *NodeId, nice uint8) {
79 dirLock, err := ctx.LockDir(nodeId, TRx)
83 defer ctx.UnlockDir(dirLock)
84 for job := range ctx.Jobs(nodeId, TRx) {
85 pktName := filepath.Base(job.Fd.Name())
86 sds := SDS{"node": job.PktEnc.Sender, "pkt": pktName}
87 if job.PktEnc.Nice > nice {
88 ctx.LogD("rx", SdsAdd(sds, SDS{
89 "nice": strconv.Itoa(int(job.PktEnc.Nice)),
93 pipeR, pipeW := io.Pipe()
94 errs := make(chan error, 1)
96 pipeWB := bufio.NewWriter(pipeW)
100 bufio.NewReader(job.Fd),
108 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "decryption")
114 if _, err = xdr.Unmarshal(pipeR, &pkt); err != nil {
115 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "unmarshal")
118 pktSize = job.Size - PktEncOverhead - PktOverhead
119 sds["size"] = strconv.FormatInt(pktSize, 10)
120 ctx.LogD("rx", sds, "taken")
123 recipients := string(pkt.Path[:int(pkt.PathLen)])
124 sds := SdsAdd(sds, SDS{
128 decompressor, err := zlib.NewReader(pipeR)
135 ctx.Sendmail[1:len(ctx.Sendmail)],
136 strings.Split(recipients, " ")...,
139 cmd.Stdin = decompressor
140 if err = cmd.Run(); err != nil {
141 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "sendmail")
144 ctx.LogI("rx", sds, "")
145 if err = os.Remove(job.Fd.Name()); err != nil {
146 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "remove")
149 dst := string(pkt.Path[:int(pkt.PathLen)])
150 sds := SdsAdd(sds, SDS{"type": "file", "dst": dst})
151 incoming := ctx.Neigh[*job.PktEnc.Sender].Incoming
153 ctx.LogE("rx", sds, "incoming is not allowed")
156 dir := filepath.Join(*incoming, path.Dir(dst))
157 if err = os.MkdirAll(dir, os.FileMode(0700)); err != nil {
158 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "mkdir")
161 tmp, err := ioutil.TempFile(dir, "nncp-file")
162 sds["tmp"] = tmp.Name()
163 ctx.LogD("rx", sds, "created")
165 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "mktemp")
168 bufW := bufio.NewWriter(tmp)
169 if _, err = io.Copy(bufW, pipeR); err != nil {
170 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "copy")
176 dstPathOrig := filepath.Join(*incoming, dst)
177 dstPath := dstPathOrig
180 if _, err = os.Stat(dstPath); err != nil {
181 if os.IsNotExist(err) {
184 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "stat")
187 dstPath = dstPathOrig + strconv.Itoa(dstPathCtr)
190 if err = os.Rename(tmp.Name(), dstPath); err != nil {
191 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "rename")
194 ctx.LogI("rx", sds, "")
195 if err = os.Remove(job.Fd.Name()); err != nil {
196 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "remove")
198 if ctx.NotifyFile != nil {
202 ctx.Sendmail[1:len(ctx.Sendmail)],
206 cmd.Stdin = newNotification(ctx.NotifyFile, fmt.Sprintf(
207 "File from %s: %s (%s)",
208 ctx.Neigh[*job.PktEnc.Sender].Name,
210 humanize.IBytes(uint64(pktSize)),
215 src := string(pkt.Path[:int(pkt.PathLen)])
216 sds := SdsAdd(sds, SDS{"type": "freq", "src": src})
217 dstRaw, err := ioutil.ReadAll(pipeR)
219 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "read")
222 dst := string(dstRaw)
224 sender := ctx.Neigh[*job.PktEnc.Sender]
227 ctx.LogE("rx", sds, "freqing is not allowed")
230 err = ctx.TxFile(sender, job.PktEnc.Nice, filepath.Join(*freq, src), dst)
232 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "tx file")
235 ctx.LogI("rx", sds, "")
236 if err = os.Remove(job.Fd.Name()); err != nil {
237 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "remove")
239 if ctx.NotifyFreq != nil {
243 ctx.Sendmail[1:len(ctx.Sendmail)],
247 cmd.Stdin = newNotification(ctx.NotifyFreq, fmt.Sprintf(
249 ctx.Neigh[*job.PktEnc.Sender].Name,
255 dst := new([blake2b.Size256]byte)
256 copy(dst[:], pkt.Path[:int(pkt.PathLen)])
257 nodeId := NodeId(*dst)
258 node, known := ctx.Neigh[nodeId]
259 sds := SdsAdd(sds, SDS{"type": "trns", "dst": nodeId})
261 ctx.LogE("rx", sds, "unknown node")
264 ctx.LogD("rx", sds, "taken")
265 if err = ctx.TxTrns(node, job.PktEnc.Nice, pktSize, pipeR); err != nil {
266 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "tx trns")
269 ctx.LogI("rx", sds, "")
270 if err = os.Remove(job.Fd.Name()); err != nil {
271 ctx.LogE("rx", SdsAdd(sds, SDS{"err": err}), "remove")
274 ctx.LogE("rx", sds, "unknown type")