2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
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/>.
19 // Parse raw NNCP packet
33 "github.com/davecgh/go-xdr/xdr2"
34 "golang.org/x/crypto/blake2b"
38 fmt.Fprintf(os.Stderr, nncp.UsageHeader())
39 fmt.Fprintln(os.Stderr, "nncp-pkt -- parse raw packet\n")
40 fmt.Fprintf(os.Stderr, "Usage: %s [options]\nOptions:\n", os.Args[0])
42 fmt.Fprintln(os.Stderr, "Packet is read from stdin.")
47 dump = flag.Bool("dump", false, "Write decrypted/parsed payload to stdout")
48 decompress = flag.Bool("decompress", false, "Try to zlib decompress dumped data")
49 cfgPath = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
50 version = flag.Bool("version", false, "Print version information")
51 warranty = flag.Bool("warranty", false, "Print warranty information")
56 fmt.Println(nncp.Warranty)
60 fmt.Println(nncp.VersionGet())
65 beginning := make([]byte, nncp.PktOverhead-8-2*blake2b.Size256)
66 if _, err = io.ReadFull(os.Stdin, beginning); err != nil {
67 log.Fatalln("Not enough data to read")
70 _, err = xdr.Unmarshal(bytes.NewReader(beginning), &pkt)
71 if err == nil && pkt.Magic == nncp.MagicNNCPPv1 {
73 bufW := bufio.NewWriter(os.Stdout)
75 r = bufio.NewReader(os.Stdin)
77 decompressor, err := zlib.NewReader(r)
83 if _, err = io.Copy(bufW, r); err != nil {
86 if err = bufW.Flush(); err != nil {
91 payloadType := "unknown"
93 case nncp.PktTypeFile:
95 case nncp.PktTypeFreq:
96 payloadType = "file request"
97 case nncp.PktTypeMail:
99 case nncp.PktTypeTrns:
100 payloadType = "transitional"
104 case nncp.PktTypeTrns:
105 path = nncp.ToBase32(pkt.Path[:pkt.PathLen])
107 path = string(pkt.Path[:pkt.PathLen])
109 fmt.Printf("Packet type: plain\nPayload type: %s\nPath: %s\n", payloadType, path)
112 var pktEnc nncp.PktEnc
113 _, err = xdr.Unmarshal(bytes.NewReader(beginning), &pktEnc)
114 if err == nil && pktEnc.Magic == nncp.MagicNNCPEv3 {
116 ctx, err := nncp.CtxFromCmdline(*cfgPath, "", "", false, false)
118 log.Fatalln("Error during initialization:", err)
121 log.Fatalln("Config lacks private keys")
123 bufW := bufio.NewWriter(os.Stdout)
124 if _, _, err = nncp.PktEncRead(
128 bytes.NewReader(beginning),
129 bufio.NewReader(os.Stdin),
135 if err = bufW.Flush(); err != nil {
141 "Packet type: encrypted\nNiceness: %d\nSender: %s\nRecipient: %s\n",
142 pktEnc.Nice, pktEnc.Sender, pktEnc.Recipient,
146 log.Fatalln("Unable to determine packet type")