aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/ui/editdialog.go
blob: 3cd5b606a08b66f9b2dcaed1b2fa9b4db90bedb6 (plain) (blame)
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
/* SPDX-License-Identifier: MIT
 *
 * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
 */

package ui

import (
	"fmt"
	"strings"

	"github.com/lxn/walk"
	"golang.zx2c4.com/wireguard/windows/conf"
	"golang.zx2c4.com/wireguard/windows/service"
	"golang.zx2c4.com/wireguard/windows/ui/syntax"
)

const (
	configKeyDNS        = "DNS"
	configKeyAllowedIPs = "AllowedIPs"
)

var (
	ipv4Wildcard       = orderedStringSetFromSlice([]string{"0.0.0.0/0"})
	ipv4PublicNetworks = orderedStringSetFromSlice([]string{
		"0.0.0.0/5", "8.0.0.0/7", "11.0.0.0/8", "12.0.0.0/6", "16.0.0.0/4", "32.0.0.0/3",
		"64.0.0.0/2", "128.0.0.0/3", "160.0.0.0/5", "168.0.0.0/6", "172.0.0.0/12",
		"172.32.0.0/11", "172.64.0.0/10", "172.128.0.0/9", "173.0.0.0/8", "174.0.0.0/7",
		"176.0.0.0/4", "192.0.0.0/9", "192.128.0.0/11", "192.160.0.0/13", "192.169.0.0/16",
		"192.170.0.0/15", "192.172.0.0/14", "192.176.0.0/12", "192.192.0.0/10",
		"193.0.0.0/8", "194.0.0.0/7", "196.0.0.0/6", "200.0.0.0/5", "208.0.0.0/4",
	})
)

type allowedIPsState int

const (
	allowedIPsStateInvalid allowedIPsState = iota
	allowedIPsStateContainsIPV4Wildcard
	allowedIPsStateContainsIPV4PublicNetworks
	allowedIPsStateOther
)

type EditDialog struct {
	*walk.Dialog
	nameEdit            *walk.LineEdit
	pubkeyEdit          *walk.LineEdit
	syntaxEdit          *syntax.SyntaxEdit
	excludePrivateIPsCB *walk.CheckBox
	saveButton          *walk.PushButton
	tunnel              *service.Tunnel
	config              conf.Config
	allowedIPsState     allowedIPsState
	lastPrivateKey      string
	inCheckedChanged    bool
}

func runTunnelEditDialog(owner walk.Form, tunnel *service.Tunnel) *conf.Config {
	var (
		title string
		name  string
	)

	dlg := &EditDialog{tunnel: tunnel}

	if tunnel == nil {
		// Creating a new tunnel, create a new private key and use the default template
		title = "Create new tunnel"
		pk, _ := conf.NewPrivateKey()
		dlg.config = conf.Config{Interface: conf.Interface{PrivateKey: *pk}}
	} else {
		title = "Edit tunnel"
		name = tunnel.Name
		dlg.config, _ = tunnel.StoredConfig()
	}

	layout := walk.NewGridLayout()
	layout.SetSpacing(6)
	layout.SetMargins(walk.Margins{10, 10, 10, 10})
	layout.SetColumnStretchFactor(1, 3)

	dlg.Dialog, _ = walk.NewDialog(owner)
	dlg.SetIcon(owner.Icon())
	dlg.SetTitle(title)
	dlg.SetLayout(layout)
	dlg.SetMinMaxSize(walk.Size{500, 400}, walk.Size{0, 0})

	nameLabel, _ := walk.NewTextLabel(dlg)
	layout.SetRange(nameLabel, walk.Rectangle{0, 0, 1, 1})
	nameLabel.SetTextAlignment(walk.AlignHFarVCenter)
	nameLabel.SetText("Name:")

	dlg.nameEdit, _ = walk.NewLineEdit(dlg)
	layout.SetRange(dlg.nameEdit, walk.Rectangle{1, 0, 1, 1})
	dlg.nameEdit.SetText(name)

	pubkeyLabel, _ := walk.NewTextLabel(dlg)
	layout.SetRange(pubkeyLabel, walk.Rectangle{0, 1, 1, 1})
	pubkeyLabel.SetTextAlignment(walk.AlignHFarVCenter)
	pubkeyLabel.SetText("Public key:")

	dlg.pubkeyEdit, _ = walk.NewLineEdit(dlg)
	layout.SetRange(dlg.pubkeyEdit, walk.Rectangle{1, 1, 1, 1})
	dlg.pubkeyEdit.SetReadOnly(true)
	dlg.pubkeyEdit.SetText("(unknown)")

	dlg.syntaxEdit, _ = syntax.NewSyntaxEdit(dlg)
	layout.SetRange(dlg.syntaxEdit, walk.Rectangle{0, 2, 2, 1})
	dlg.syntaxEdit.PrivateKeyChanged().Attach(dlg.onSyntaxEditPrivateKeyChanged)
	dlg.syntaxEdit.SetText(dlg.config.ToWgQuick())
	dlg.syntaxEdit.TextChanged().Attach(dlg.updateExcludePrivateIPsCBVisible)

	buttonsContainer, _ := walk.NewComposite(dlg)
	layout.SetRange(buttonsContainer, walk.Rectangle{0, 3, 2, 1})
	buttonsContainer.SetLayout(walk.NewHBoxLayout())
	buttonsContainer.Layout().SetMargins(walk.Margins{})

	dlg.excludePrivateIPsCB, _ = walk.NewCheckBox(buttonsContainer)
	dlg.excludePrivateIPsCB.SetText("Exclude private IPs")
	dlg.excludePrivateIPsCB.CheckedChanged().Attach(dlg.onExcludePrivateIPsCBCheckedChanged)
	dlg.updateExcludePrivateIPsCBVisible()

	walk.NewHSpacer(buttonsContainer)

	dlg.saveButton, _ = walk.NewPushButton(buttonsContainer)
	dlg.saveButton.SetText("Save")
	dlg.saveButton.Clicked().Attach(dlg.onSaveButtonClicked)

	cancelButton, _ := walk.NewPushButton(buttonsContainer)
	cancelButton.SetText("Cancel")
	cancelButton.Clicked().Attach(dlg.Cancel)

	dlg.SetCancelButton(cancelButton)
	dlg.SetDefaultButton(dlg.saveButton)

	dlg.updateAllowedIPsState()

	if dlg.Run() == walk.DlgCmdOK {
		// Save
		return &dlg.config
	}

	return nil
}

func (dlg *EditDialog) updateAllowedIPsState() {
	var newState allowedIPsState
	if len(dlg.config.Peers) == 1 {
		if allowedIPs := dlg.allowedIPsSet(); allowedIPs.IsSupersetOf(ipv4Wildcard) {
			newState = allowedIPsStateContainsIPV4Wildcard
		} else if allowedIPs.IsSupersetOf(ipv4PublicNetworks) {
			newState = allowedIPsStateContainsIPV4PublicNetworks
		} else {
			newState = allowedIPsStateOther
		}
	} else {
		newState = allowedIPsStateInvalid
	}

	if newState != dlg.allowedIPsState {
		dlg.allowedIPsState = newState

		dlg.excludePrivateIPsCB.SetVisible(dlg.canExcludePrivateIPs())
		dlg.excludePrivateIPsCB.SetChecked(dlg.privateIPsExcluded())
	}
}

func (dlg *EditDialog) canExcludePrivateIPs() bool {
	return dlg.allowedIPsState == allowedIPsStateContainsIPV4PublicNetworks ||
		dlg.allowedIPsState == allowedIPsStateContainsIPV4Wildcard
}

func (dlg *EditDialog) privateIPsExcluded() bool {
	return dlg.allowedIPsState == allowedIPsStateContainsIPV4PublicNetworks
}

func (dlg *EditDialog) setPrivateIPsExcluded(excluded bool) {
	if !dlg.canExcludePrivateIPs() || dlg.privateIPsExcluded() == excluded {
		return
	}

	var oldNetworks, newNetworks *orderedStringSet
	if excluded {
		oldNetworks, newNetworks = ipv4Wildcard, ipv4PublicNetworks
	} else {
		oldNetworks, newNetworks = ipv4PublicNetworks, ipv4Wildcard
	}
	input := dlg.allowedIPs()
	output := newOrderedStringSet()
	var replaced bool

	// Replace the first instance of the wildcard with the public network list, or vice versa.
	for _, network := range input {
		if oldNetworks.Contains(network) {
			if !replaced {
				output.UniteWith(newNetworks)
				replaced = true
			}
		} else {
			output.Add(network)
		}
	}

	// DNS servers only need to be handled specially when we're excluding private IPs.
	for _, route := range dlg.dnsRoutes() {
		if excluded {
			output.Add(route)
		} else {
			output.Remove(route)
			output.Remove(route + "/32")
		}
	}

	if excluded {
		dlg.allowedIPsState = allowedIPsStateContainsIPV4PublicNetworks
	} else {
		dlg.allowedIPsState = allowedIPsStateContainsIPV4Wildcard
	}

	dlg.replaceLine(configKeyAllowedIPs, strings.Join(output.ToSlice(), ", "))
}

func (dlg *EditDialog) replaceLine(key, value string) {
	text := dlg.syntaxEdit.Text()

	start := strings.Index(text, key)
	end := start + strings.Index(text[start:], "\n")
	oldLine := text[start:end]
	newLine := fmt.Sprintf("%s = %s", key, value)

	dlg.syntaxEdit.SetText(strings.ReplaceAll(text, oldLine, newLine))
}

func (dlg *EditDialog) updateExcludePrivateIPsCBVisible() {
	dlg.updateAllowedIPsState()

	dlg.excludePrivateIPsCB.SetVisible(dlg.canExcludePrivateIPs())
}

func (dlg *EditDialog) dnsRoutes() []string {
	return dlg.routes(configKeyDNS)
}

func (dlg *EditDialog) allowedIPs() []string {
	return dlg.routes(configKeyAllowedIPs)
}

func (dlg *EditDialog) allowedIPsSet() *orderedStringSet {
	return orderedStringSetFromSlice(dlg.allowedIPs())
}

func (dlg *EditDialog) routes(key string) []string {
	var routes []string

	lines := strings.Split(dlg.syntaxEdit.Text(), "\n")
	for _, line := range lines {
		if strings.HasPrefix(strings.TrimSpace(line), key) {
			routesMaybeWithSpace := strings.Split(strings.TrimSpace(line[strings.IndexByte(line, '=')+1:]), ",")
			routes = make([]string, len(routesMaybeWithSpace))
			for i, route := range routesMaybeWithSpace {
				routes[i] = strings.TrimSpace(route)
			}
			break
		}
	}

	return routes
}

func (dlg *EditDialog) onExcludePrivateIPsCBCheckedChanged() {
	dlg.setPrivateIPsExcluded(dlg.excludePrivateIPsCB.Checked())
}

func (dlg *EditDialog) onSyntaxEditPrivateKeyChanged(privateKey string) {
	if privateKey == dlg.lastPrivateKey {
		return
	}
	dlg.lastPrivateKey = privateKey
	key, _ := conf.NewPrivateKeyFromString(privateKey)
	if key != nil {
		dlg.pubkeyEdit.SetText(key.Public().String())
	} else {
		dlg.pubkeyEdit.SetText("(unknown)")
	}
}

func (dlg *EditDialog) onSaveButtonClicked() {
	newName := dlg.nameEdit.Text()
	if newName == "" {
		walk.MsgBox(dlg, "Invalid configuration", "Name is required", walk.MsgBoxIconWarning)
		return
	}

	if dlg.tunnel != nil && dlg.tunnel.Name != newName {
		names, err := conf.ListConfigNames()
		if err != nil {
			walk.MsgBox(dlg, "Error", err.Error(), walk.MsgBoxIconError)
			return
		}

		for _, name := range names {
			if strings.ToLower(name) == strings.ToLower(newName) {
				walk.MsgBox(dlg, "Invalid configuration", fmt.Sprintf("Another tunnel already exists with the name ‘%s’.", newName), walk.MsgBoxIconWarning)
				return
			}
		}
	}

	if !conf.TunnelNameIsValid(newName) {
		walk.MsgBox(dlg, "Invalid configuration", fmt.Sprintf("Tunnel name ‘%s’ is invalid.", newName), walk.MsgBoxIconWarning)
		return
	}

	cfg, err := conf.FromWgQuick(dlg.syntaxEdit.Text(), newName)
	if err != nil {
		walk.MsgBox(dlg, "Error", err.Error(), walk.MsgBoxIconError)
		return
	}

	dlg.config = *cfg

	dlg.Accept()
}