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[nncp.git] / src / cypherpunks.ru / nncp / cmd / nncp-call / main.go
1 /*
2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
3 Copyright (C) 2016-2017 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, either version 3 of the License, or
8 (at your option) any later version.
9
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.
14
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/>.
17 */
18
19 // Call NNCP TCP daemon
20 package main
21
22 import (
23         "flag"
24         "fmt"
25         "io/ioutil"
26         "log"
27         "net"
28         "os"
29         "strconv"
30         "strings"
31
32         "cypherpunks.ru/nncp"
33 )
34
35 func usage() {
36         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
37         fmt.Fprintln(os.Stderr, "nncp-call -- call TCP daemon\n")
38         fmt.Fprintf(os.Stderr, "Usage: %s [options] NODE[:ADDR] [FORCEADDR]\n", os.Args[0])
39         fmt.Fprintln(os.Stderr, "You must specify either [NODE:ADDR] or [NODE FORCEADDR]\n")
40         fmt.Fprintln(os.Stderr, "Options:")
41         flag.PrintDefaults()
42 }
43
44 func main() {
45         var (
46                 cfgPath  = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
47                 niceRaw  = flag.Int("nice", 255, "Minimal required niceness")
48                 rxOnly   = flag.Bool("rx", false, "Only receive packets")
49                 txOnly   = flag.Bool("tx", false, "Only transfer packets")
50                 quiet    = flag.Bool("quiet", false, "Print only errors")
51                 debug    = flag.Bool("debug", false, "Enable debugging information")
52                 version  = flag.Bool("version", false, "Print version information")
53                 warranty = flag.Bool("warranty", false, "Print warranty information")
54         )
55         flag.Usage = usage
56         flag.Parse()
57         if *warranty {
58                 fmt.Println(nncp.Warranty)
59                 return
60         }
61         if *version {
62                 fmt.Println(nncp.VersionGet())
63                 return
64         }
65         if flag.NArg() < 1 {
66                 usage()
67                 os.Exit(1)
68         }
69         if *niceRaw < 1 || *niceRaw > 255 {
70                 log.Fatalln("-nice must be between 1 and 255")
71         }
72         nice := uint8(*niceRaw)
73         if *rxOnly && *txOnly {
74                 log.Fatalln("-rx and -tx can not be set simultaneously")
75         }
76
77         cfgRaw, err := ioutil.ReadFile(*cfgPath)
78         if err != nil {
79                 log.Fatalln("Can not read config:", err)
80         }
81         ctx, err := nncp.CfgParse(cfgRaw)
82         if err != nil {
83                 log.Fatalln("Can not parse config:", err)
84         }
85         ctx.Quiet = *quiet
86         ctx.Debug = *debug
87
88         splitted := strings.SplitN(flag.Arg(0), ":", 2)
89         node, err := ctx.FindNode(splitted[0])
90         if err != nil {
91                 log.Fatalln("Invalid NODE specified:", err)
92         }
93         if len(splitted) == 1 && flag.NArg() != 2 {
94                 usage()
95                 os.Exit(1)
96         }
97         var dst string
98         if len(splitted) == 2 {
99                 var known bool
100                 dst, known = ctx.Neigh[*node.Id].Addrs[splitted[1]]
101                 if !known {
102                         log.Fatalln("Unknown ADDR specified")
103                 }
104         } else {
105                 dst = flag.Arg(1)
106         }
107
108         conn, err := net.Dial("tcp", dst)
109         if err != nil {
110                 log.Fatalln("Can not connect:", err)
111         }
112         ctx.LogD("call", nncp.SDS{"addr": dst}, "connected")
113         var xxOnly nncp.TRxTx
114         if *rxOnly {
115                 xxOnly = nncp.TRx
116         } else if *txOnly {
117                 xxOnly = nncp.TTx
118         }
119         state, err := ctx.StartI(conn, node.Id, nice, &xxOnly)
120         if err == nil {
121                 ctx.LogI("call-start", nncp.SDS{"node": state.NodeId}, "connected")
122                 state.Wait()
123                 ctx.LogI("call-finish", nncp.SDS{
124                         "node":     state.NodeId,
125                         "duration": strconv.FormatInt(int64(state.Duration.Seconds()), 10),
126                         "rxbytes":  strconv.FormatInt(state.RxBytes, 10),
127                         "txbytes":  strconv.FormatInt(state.TxBytes, 10),
128                         "rxspeed":  strconv.FormatInt(state.RxSpeed, 10),
129                         "txspeed":  strconv.FormatInt(state.TxSpeed, 10),
130                 }, "")
131         } else {
132                 ctx.LogE("call-start", nncp.SDS{"node": state.NodeId, "err": err}, "")
133                 conn.Close()
134                 os.Exit(1)
135         }
136         conn.Close()
137 }