2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
3 Copyright (C) 2016-2018 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/>.
19 // Create/digest stream of NNCP encrypted packets.
37 "github.com/davecgh/go-xdr/xdr2"
38 "golang.org/x/crypto/blake2b"
46 fmt.Fprintf(os.Stderr, nncp.UsageHeader())
47 fmt.Fprintf(os.Stderr, "nncp-bundle -- Create/digest stream of NNCP encrypted packets\n\n")
48 fmt.Fprintf(os.Stderr, "Usage: %s [options] -tx [-delete] NODE [NODE ...] > ...\n", os.Args[0])
49 fmt.Fprintf(os.Stderr, " %s [options] -rx -delete [-dryrun] [NODE ...] < ...\n", os.Args[0])
50 fmt.Fprintf(os.Stderr, " %s [options] -rx [-check] [-dryrun] [NODE ...] < ...\n", os.Args[0])
51 fmt.Fprintln(os.Stderr, "Options:")
57 cfgPath = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
58 niceRaw = flag.String("nice", nncp.NicenessFmt(255), "Minimal required niceness")
59 doRx = flag.Bool("rx", false, "Receive packets")
60 doTx = flag.Bool("tx", false, "Transfer packets")
61 doDelete = flag.Bool("delete", false, "Delete transferred packets")
62 doCheck = flag.Bool("check", false, "Check integrity while receiving")
63 dryRun = flag.Bool("dryrun", false, "Do no writes")
64 spoolPath = flag.String("spool", "", "Override path to spool")
65 logPath = flag.String("log", "", "Override path to logfile")
66 quiet = flag.Bool("quiet", false, "Print only errors")
67 debug = flag.Bool("debug", false, "Print debug messages")
68 version = flag.Bool("version", false, "Print version information")
69 warranty = flag.Bool("warranty", false, "Print warranty information")
74 fmt.Println(nncp.Warranty)
78 fmt.Println(nncp.VersionGet())
81 nice, err := nncp.NicenessParse(*niceRaw)
86 log.Fatalln("-rx and -tx can not be set simultaneously")
89 log.Fatalln("At least one of -rx and -tx must be specified")
92 ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, *logPath, *quiet, *debug)
94 log.Fatalln("Error during initialization:", err)
97 nodeIds := make(map[nncp.NodeId]struct{}, flag.NArg())
98 for i := 0; i < flag.NArg(); i++ {
99 node, err := ctx.FindNode(flag.Arg(i))
101 log.Fatalln("Invalid specified:", err)
103 nodeIds[*node.Id] = struct{}{}
108 sds["xx"] = string(nncp.TTx)
110 bufStdout := bufio.NewWriter(os.Stdout)
111 tarWr := tar.NewWriter(bufStdout)
112 for nodeId, _ := range nodeIds {
113 sds["node"] = nodeId.String()
114 for job := range ctx.Jobs(&nodeId, nncp.TTx) {
115 pktName = filepath.Base(job.Fd.Name())
117 if job.PktEnc.Nice > nice {
118 ctx.LogD("nncp-bundle", sds, "too nice")
122 if err = tarWr.WriteHeader(&tar.Header{
123 Format: tar.FormatUSTAR,
124 Name: nncp.NNCPBundlePrefix,
126 Typeflag: tar.TypeDir,
128 log.Fatalln("Error writing tar header:", err)
130 if err = tarWr.WriteHeader(&tar.Header{
131 Format: tar.FormatPAX,
132 Name: strings.Join([]string{
133 nncp.NNCPBundlePrefix,
140 Typeflag: tar.TypeReg,
142 log.Fatalln("Error writing tar header:", err)
144 if _, err = io.Copy(tarWr, job.Fd); err != nil {
145 log.Fatalln("Error during copying to tar:", err)
148 if err = tarWr.Flush(); err != nil {
149 log.Fatalln("Error during tar flushing:", err)
151 if err = bufStdout.Flush(); err != nil {
152 log.Fatalln("Error during stdout flushing:", err)
155 if err = os.Remove(job.Fd.Name()); err != nil {
156 log.Fatalln("Error during deletion:", err)
159 ctx.LogI("nncp-bundle", nncp.SdsAdd(sds, nncp.SDS{
160 "size": strconv.FormatInt(job.Size, 10),
164 if err = tarWr.Close(); err != nil {
165 log.Fatalln("Error during tar closing:", err)
168 bufStdin := bufio.NewReaderSize(os.Stdin, CopyBufSize*2)
172 var entry *tar.Header
174 pktEncBuf := make([]byte, nncp.PktEncOverhead)
175 var pktEnc *nncp.PktEnc
180 peeked, err = bufStdin.Peek(CopyBufSize)
181 if err != nil && err != io.EOF {
182 log.Fatalln("Error during reading:", err)
184 prefixIdx = bytes.Index(peeked, []byte(nncp.NNCPBundlePrefix))
189 bufStdin.Discard(bufStdin.Buffered() - (len(nncp.NNCPBundlePrefix) - 1))
192 bufStdin.Discard(prefixIdx)
193 tarR = tar.NewReader(bufStdin)
194 sds["xx"] = string(nncp.TRx)
195 entry, err = tarR.Next()
200 nncp.SdsAdd(sds, nncp.SDS{"err": err}),
206 if entry.Typeflag != tar.TypeDir {
207 ctx.LogD("nncp-bundle", sds, "Expected NNCP/")
210 entry, err = tarR.Next()
215 nncp.SdsAdd(sds, nncp.SDS{"err": err}),
221 sds["pkt"] = entry.Name
222 if entry.Size < nncp.PktEncOverhead {
223 ctx.LogD("nncp-bundle", sds, "Too small packet")
226 pktName = filepath.Base(entry.Name)
227 if _, err = nncp.FromBase32(pktName); err != nil {
228 ctx.LogD("nncp-bundle", sds, "Bad packet name")
231 if _, err = io.ReadFull(tarR, pktEncBuf); err != nil {
232 ctx.LogD("nncp-bundle", nncp.SdsAdd(sds, nncp.SDS{"err": err}), "read")
235 if _, err = xdr.Unmarshal(bytes.NewReader(pktEncBuf), &pktEnc); err != nil {
236 ctx.LogD("nncp-bundle", sds, "Bad packet structure")
239 if pktEnc.Magic != nncp.MagicNNCPEv3 {
240 ctx.LogD("nncp-bundle", sds, "Bad packet magic number")
243 if pktEnc.Nice > nice {
244 ctx.LogD("nncp-bundle", sds, "too nice")
247 if *pktEnc.Sender == *ctx.SelfId && *doDelete {
248 if len(nodeIds) > 0 {
249 if _, exists = nodeIds[*pktEnc.Recipient]; !exists {
250 ctx.LogD("nncp-bundle", sds, "Recipient is not requested")
254 nodeId32 := nncp.ToBase32(pktEnc.Recipient[:])
255 sds["xx"] = string(nncp.TTx)
256 sds["node"] = nodeId32
258 dstPath = filepath.Join(
264 if _, err = os.Stat(dstPath); err != nil {
265 ctx.LogD("nncp-bundle", sds, "Packet is already missing")
268 hsh, err := blake2b.New256(nil)
270 log.Fatalln("Error during hasher creation:", err)
272 if _, err = hsh.Write(pktEncBuf); err != nil {
273 log.Fatalln("Error during writing:", err)
275 if _, err = io.Copy(hsh, tarR); err != nil {
276 log.Fatalln("Error during copying:", err)
278 if nncp.ToBase32(hsh.Sum(nil)) == pktName {
279 ctx.LogI("nncp-bundle", sds, "removed")
284 ctx.LogE("nncp-bundle", sds, "bad checksum")
288 if *pktEnc.Recipient != *ctx.SelfId {
289 ctx.LogD("nncp-bundle", sds, "Unknown recipient")
292 if len(nodeIds) > 0 {
293 if _, exists = nodeIds[*pktEnc.Sender]; !exists {
294 ctx.LogD("nncp-bundle", sds, "Sender is not requested")
298 sds["node"] = nncp.ToBase32(pktEnc.Recipient[:])
300 selfPath = filepath.Join(ctx.Spool, ctx.SelfId.String(), string(nncp.TRx))
301 dstPath = filepath.Join(selfPath, pktName)
302 if _, err = os.Stat(dstPath); err == nil || !os.IsNotExist(err) {
303 ctx.LogD("nncp-bundle", sds, "Packet already exists")
306 if _, err = os.Stat(dstPath + nncp.SeenSuffix); err == nil || !os.IsNotExist(err) {
307 ctx.LogD("nncp-bundle", sds, "Packet already exists")
312 hsh, err := blake2b.New256(nil)
314 log.Fatalln("Error during hasher creation:", err)
316 if _, err = hsh.Write(pktEncBuf); err != nil {
317 log.Fatalln("Error during writing:", err)
319 if _, err = io.Copy(hsh, tarR); err != nil {
320 log.Fatalln("Error during copying:", err)
322 if nncp.ToBase32(hsh.Sum(nil)) != pktName {
323 ctx.LogE("nncp-bundle", sds, "bad checksum")
327 tmp, err := ctx.NewTmpFileWHash()
329 log.Fatalln("Error during temporary file creation:", err)
331 if _, err = tmp.W.Write(pktEncBuf); err != nil {
332 log.Fatalln("Error during writing:", err)
334 if _, err = io.Copy(tmp.W, tarR); err != nil {
335 log.Fatalln("Error during copying:", err)
337 if err = tmp.W.Flush(); err != nil {
338 log.Fatalln("Error during flusing:", err)
340 if nncp.ToBase32(tmp.Hsh.Sum(nil)) == pktName {
341 if err = tmp.Commit(selfPath); err != nil {
342 log.Fatalln("Error during commiting:", err)
345 ctx.LogE("nncp-bundle", sds, "bad checksum")
352 if _, err = io.Copy(ioutil.Discard, tarR); err != nil {
353 log.Fatalln("Error during copying:", err)
356 tmp, err := ctx.NewTmpFile()
358 log.Fatalln("Error during temporary file creation:", err)
360 bufTmp := bufio.NewWriterSize(tmp, CopyBufSize)
361 if _, err = bufTmp.Write(pktEncBuf); err != nil {
362 log.Fatalln("Error during writing:", err)
364 if _, err = io.Copy(bufTmp, tarR); err != nil {
365 log.Fatalln("Error during copying:", err)
367 if err = bufTmp.Flush(); err != nil {
368 log.Fatalln("Error during flushing:", err)
372 if err = os.MkdirAll(selfPath, os.FileMode(0700)); err != nil {
373 log.Fatalln("Error during mkdir:", err)
375 if err = os.Rename(tmp.Name(), dstPath); err != nil {
376 log.Fatalln("Error during renaming:", err)
380 ctx.LogI("nncp-bundle", nncp.SdsAdd(sds, nncp.SDS{
381 "size": strconv.FormatInt(entry.Size, 10),