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
34 "github.com/davecgh/go-xdr/xdr2"
35 "golang.org/x/crypto/blake2b"
39 fmt.Fprintf(os.Stderr, nncp.UsageHeader())
40 fmt.Fprintln(os.Stderr, "nncp-pkt -- parse raw packet\n")
41 fmt.Fprintf(os.Stderr, "Usage: %s [options]\nOptions:\n", os.Args[0])
43 fmt.Fprintln(os.Stderr, "Packet is read from stdin.")
48 dump = flag.Bool("dump", false, "Write decrypted/parsed payload to stdout")
49 decompress = flag.Bool("decompress", false, "Try to zlib decompress dumped data")
50 cfgPath = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
51 version = flag.Bool("version", false, "Print version information")
52 warranty = flag.Bool("warranty", false, "Print warranty information")
57 fmt.Println(nncp.Warranty)
61 fmt.Println(nncp.VersionGet())
66 beginning := make([]byte, nncp.PktOverhead-8-2*blake2b.Size256)
67 if _, err = io.ReadFull(os.Stdin, beginning); err != nil {
68 log.Fatalln("Not enough data to read")
71 _, err = xdr.Unmarshal(bytes.NewReader(beginning), &pkt)
72 if err == nil && pkt.Magic == nncp.MagicNNCPPv1 {
74 bufW := bufio.NewWriter(os.Stdout)
76 r = bufio.NewReader(os.Stdin)
78 decompressor, err := zlib.NewReader(r)
84 if _, err = io.Copy(bufW, r); err != nil {
87 if err = bufW.Flush(); err != nil {
92 payloadType := "unknown"
94 case nncp.PktTypeFile:
96 case nncp.PktTypeFreq:
97 payloadType = "file request"
98 case nncp.PktTypeMail:
100 case nncp.PktTypeTrns:
101 payloadType = "transitional"
105 case nncp.PktTypeTrns:
106 path = nncp.ToBase32(pkt.Path[:pkt.PathLen])
108 path = string(pkt.Path[:pkt.PathLen])
110 fmt.Printf("Packet type: plain\nPayload type: %s\nPath: %s\n", payloadType, path)
113 var pktEnc nncp.PktEnc
114 _, err = xdr.Unmarshal(bytes.NewReader(beginning), &pktEnc)
115 if err == nil && pktEnc.Magic == nncp.MagicNNCPEv1 {
117 cfgRaw, err := ioutil.ReadFile(nncp.CfgPathFromEnv(cfgPath))
119 log.Fatalln("Can not read config:", err)
121 ctx, err := nncp.CfgParse(cfgRaw)
123 log.Fatalln("Can not parse config:", err)
125 bufW := bufio.NewWriter(os.Stdout)
126 if _, _, err = nncp.PktEncRead(
130 bytes.NewReader(beginning),
131 bufio.NewReader(os.Stdin),
137 if err = bufW.Flush(); err != nil {
143 "Packet type: encrypted\nNiceness: %d\nSender: %s\n",
144 pktEnc.Nice, pktEnc.Sender,
148 log.Fatalln("Unable to determine packet type")