1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
package network
import (
"bufio"
"fmt"
"net"
"regexp"
"strconv"
"strings"
"github.com/bettercap/bettercap/core"
)
// see Windows version to understand why ....
func getInterfaceName(iface net.Interface) string {
return iface.Name
}
// See https://github.com/bettercap/bettercap/issues/819
func ForceMonitorMode(iface string) error {
_, _ = core.Exec("ip", []string{"link", "set", iface, "down"})
out, err := core.Exec("iw", []string{"dev", iface, "set", "type", "monitor"})
if err != nil {
return fmt.Errorf("iw: out=%s err=%s", out, err)
} else if out != "" {
return fmt.Errorf("Unexpected output while setting interface %s into monitor mode: %s", iface, out)
}
_, _ = core.Exec("ip", []string{"link", "set", iface, "up"})
return nil
}
func SetInterfaceChannel(iface string, channel int) error {
curr := GetInterfaceChannel(iface)
// the interface is already on this channel
if curr == channel {
return nil
}
if core.HasBinary("iw") {
// Debug("SetInterfaceChannel(%s, %d) iw based", iface, channel)
out, err := core.Exec("iw", []string{"dev", iface, "set", "channel", fmt.Sprintf("%d", channel)})
if err != nil {
return fmt.Errorf("iw: out=%s err=%s", out, err)
} else if out != "" {
return fmt.Errorf("Unexpected output while setting interface %s to channel %d: %s", iface, channel, out)
}
} else if core.HasBinary("iwconfig") {
// Debug("SetInterfaceChannel(%s, %d) iwconfig based")
out, err := core.Exec("iwconfig", []string{iface, "channel", fmt.Sprintf("%d", channel)})
if err != nil {
return fmt.Errorf("iwconfig: out=%s err=%s", out, err)
} else if out != "" {
return fmt.Errorf("Unexpected output while setting interface %s to channel %d: %s", iface, channel, out)
}
} else {
return fmt.Errorf("no iw or iwconfig binaries found in $PATH")
}
SetInterfaceCurrentChannel(iface, channel)
return nil
}
var iwlistFreqParser = regexp.MustCompile(`^\s+Channel.([0-9]+)\s+:\s+([0-9\.]+)\s+GHz.*$`)
func iwlistSupportedFrequencies(iface string) ([]int, error) {
out, err := core.Exec("iwlist", []string{iface, "freq"})
if err != nil {
return nil, err
}
freqs := make([]int, 0)
if out != "" {
scanner := bufio.NewScanner(strings.NewReader(out))
for scanner.Scan() {
line := scanner.Text()
matches := iwlistFreqParser.FindStringSubmatch(line)
if len(matches) == 3 {
if freq, err := strconv.ParseFloat(matches[2], 64); err == nil {
freqs = append(freqs, int(freq*1000))
}
}
}
}
return freqs, nil
}
var iwPhyParser = regexp.MustCompile(`^\s*wiphy\s+(\d+)$`)
var iwFreqParser = regexp.MustCompile(`^\s+\*\s+(\d+)\s+MHz.+dBm.+$`)
func iwSupportedFrequencies(iface string) ([]int, error) {
// first determine phy index
out, err := core.Exec("iw", []string{iface, "info"})
if err != nil {
return nil, fmt.Errorf("error getting %s phy index: %v", iface, err)
}
phy := int64(-1)
scanner := bufio.NewScanner(strings.NewReader(out))
for scanner.Scan() {
line := scanner.Text()
matches := iwPhyParser.FindStringSubmatch(line)
if len(matches) == 2 {
if phy, err = strconv.ParseInt(matches[1], 10, 32); err != nil {
return nil, fmt.Errorf("error parsing %s phy index: %v (line: %s)", iface, err, line)
}
}
}
if phy == -1 {
return nil, fmt.Errorf("could not find %s phy index", iface)
}
// then get phyN info
phyName := fmt.Sprintf("phy%d", phy)
out, err = core.Exec("iw", []string{phyName, "info"})
if err != nil {
return nil, fmt.Errorf("error getting %s (%s) info: %v", phyName, iface, err)
}
freqs := []int{}
scanner = bufio.NewScanner(strings.NewReader(out))
for scanner.Scan() {
line := scanner.Text()
matches := iwFreqParser.FindStringSubmatch(line)
if len(matches) == 2 {
if freq, err := strconv.ParseInt(matches[1], 10, 64); err != nil {
return nil, fmt.Errorf("error parsing %s freq: %v (line: %s)", iface, err, line)
} else {
freqs = append(freqs, int(freq))
}
}
}
return freqs, nil
}
func GetSupportedFrequencies(iface string) ([]int, error) {
// give priority to iwlist because of https://github.com/bettercap/bettercap/issues/881
if core.HasBinary("iwlist") {
return iwlistSupportedFrequencies(iface)
} else if core.HasBinary("iw") {
return iwSupportedFrequencies(iface)
}
return nil, fmt.Errorf("no iw or iwlist binaries found in $PATH")
}
|
