summaryrefslogtreecommitdiff
path: root/package/base-files/files/lib/functions/network.sh
blob: 369fa3dbde1bfb968435f00a4bc953f9bf6a4a7b (plain)
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
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
. /usr/share/libubox/jshn.sh

__network_set_cache()
{
	if [ -n "$3" ]; then
		eval "export -- __NETWORK_CV_$1='$3'"
		__NETWORK_CACHE="${__NETWORK_CACHE:+$__NETWORK_CACHE }__NETWORK_CV_$1"
	elif json_get_var "__NETWORK_CV_$1" "$2"; then
		__NETWORK_CACHE="${__NETWORK_CACHE:+$__NETWORK_CACHE }__NETWORK_CV_$1"
	fi
}

__network_export()
{
	local __v="__NETWORK_CV_$2"
	eval "export -- \"$1=\${$__v:+\$$__v$3}\"; [ -n \"\${$__v+x}\" ]"
}

__network_parse_ifstatus()
{
	local __iface="$1"
	local __key="${__iface}"
	local __tmp
	local __old_ns

	__network_export __tmp "${__key}__parsed" && return 0
	__tmp="$(ubus call network.interface."$__iface" status 2>/dev/null)"
	[ -n "$__tmp" ] || return 1

	json_set_namespace "network" __old_ns
	json_load "$__tmp"

	__network_set_cache "${__key}__parsed" "" "1"

	for __tmp in "" "_inactive"; do

		__key="${__key}${__tmp}"

		# parse addresses
		local __family
		for __family in 4 6; do
			if json_is_a "ipv${__family}_address" array; then

				json_select "ipv${__family}_address"

				if json_is_a 1 object; then

					json_select 1
					__network_set_cache "${__key}_address${__family}" address
					__network_set_cache "${__key}_mask${__family}"    mask
					json_select ".."

				fi

				json_select ".."

			fi
		done

		# parse prefixes
		if json_is_a "ipv6_prefix" array; then
			json_select "ipv6_prefix"

			if json_is_a 1 object; then
				json_select 1
				__network_set_cache "${__key}_prefix6_address"	address
				__network_set_cache "${__key}_prefix6_mask"	mask
				json_select ".."
			fi

			json_select ".."
		fi

		# parse routes
		if json_is_a route array; then

			json_select "route"

			local __idx=1
			while json_is_a "$__idx" object; do

				json_select "$((__idx++))"
				json_get_var __tmp target

				case "${__tmp}" in
					0.0.0.0)
						__network_set_cache "${__key}_gateway4" nexthop
					;;
					::)
						__network_set_cache "${__key}_gateway6" nexthop
					;;
				esac

				json_select ".."

			done

			json_select ".."

		fi

		# parse dns info
		local __field
		for __field in "dns_server" "dns_search"; do
			if json_is_a "$__field" array; then

				json_select "$__field"

				local __idx=1
				local __dns=""

				while json_is_a "$__idx" string; do

					json_get_var __tmp "$((__idx++))"
					__dns="${__dns:+$__dns }$__tmp"

				done

				json_select ".."

				if [ -n "$__dns" ]; then
					__network_set_cache "${__key}_${__field}" "" "$__dns"
				fi
			fi
		done

		# parse up state, device and physdev
		for __field in "up" "l3_device" "device"; do
			if json_get_type __tmp "$__field"; then
				__network_set_cache "${__key}_${__field}" "$__field"
			fi
		done

		# descend into inactive table
		json_is_a "inactive" object && json_select "inactive"

	done

	json_cleanup
	json_set_namespace "$__old_ns"

	return 0
}


__network_ipaddr()
{
	local __var="$1"
	local __iface="$2"
	local __family="$3"
	local __prefix="$4"
	local __tmp

	__network_parse_ifstatus "$__iface" || return 1

	if [ $__prefix -eq 1 ]; then
		__network_export __tmp "${__iface}_mask${__family}" && \
			__network_export "$__var" "${__iface}_address${__family}" "/$__tmp"
		return $?
	fi

	__network_export "$__var" "${__iface}_address${__family}"
	return $?

}

# determine IPv4 address of given logical interface
# 1: destination variable
# 2: interface
network_get_ipaddr()  { __network_ipaddr "$1" "$2" 4 0; }

# determine IPv6 address of given logical interface
# 1: destination variable
# 2: interface
network_get_ipaddr6() { __network_ipaddr "$1" "$2" 6 0; }

# determine IPv4 subnet of given logical interface
# 1: destination variable
# 2: interface
network_get_subnet()  { __network_ipaddr "$1" "$2" 4 1; }

# determine IPv6 subnet of given logical interface
# 1: destination variable
# 2: interface
network_get_subnet6() { __network_ipaddr "$1" "$2" 6 1; }

# determine IPv6 prefix
network_get_prefix6() {
	local __var="$1"
	local __iface="$2"
	local __address
	local __mask

	__network_parse_ifstatus "$__iface" || return 1
	__network_export __mask "${__iface}_prefix6_mask" || return 1
	__network_export "$__var" "${__iface}_prefix6_address" "/$__mask"
	return $?
}


__network_gateway()
{
	local __var="$1"
	local __iface="$2"
	local __family="$3"
	local __inactive="$4"

	__network_parse_ifstatus "$__iface" || return 1

	if [ "$__inactive" = 1 -o "$__inactive" = "true" ]; then
		__network_export "$__var" "${__iface}_inactive_gateway${__family}" && \
			return 0
	fi

	__network_export "$__var" "${__iface}_gateway${__family}"
	return $?
}

# determine IPv4 gateway of given logical interface
# 1: destination variable
# 2: interface
# 3: consider inactive gateway if "true" (optional)
network_get_gateway()  { __network_gateway "$1" "$2" 4 "${3:-0}"; }

# determine  IPv6 gateway of given logical interface
# 1: destination variable
# 2: interface
# 3: consider inactive gateway if "true" (optional)
network_get_gateway6() { __network_gateway "$1" "$2" 6 "${3:-0}"; }


__network_dns() {
	local __var="$1"
	local __iface="$2"
	local __field="$3"
	local __inactive="$4"

	__network_parse_ifstatus "$__iface" || return 1

	if [ "$__inactive" = 1 -o "$__inactive" = "true" ]; then
		__network_export "$__var" "${__iface}_inactive_${__field}" && \
			return 0
	fi

	__network_export "$__var" "${__iface}_${__field}"
	return $?
}

# determine the DNS servers of the given logical interface
# 1: destination variable
# 2: interface
# 3: consider inactive servers if "true" (optional)
network_get_dnsserver() { __network_dns "$1" "$2" dns_server "${3:-0}"; }

# determine the domains of the given logical interface
# 1: destination variable
# 2: interface
# 3: consider inactive domains if "true" (optional)
network_get_dnssearch() { __network_dns "$1" "$2" dns_search "${3:-0}"; }


__network_wan()
{
	local __var="$1"
	local __family="$2"
	local __inactive="$3"
	local __iface

	for __iface in $(ubus list | sed -ne 's/^network\.interface\.//p'); do
		if [ "$__iface" != loopback ]; then
			if __network_gateway "$__var" "$__iface" "$__family" "$__inactive"; then
				eval "export -- \"$__var=$__iface\""
				return 0
			fi
		fi
	done

	eval "export -- \"$__var=\""
	return 1
}

# find the logical interface which holds the current IPv4 default route
# 1: destination variable
# 2: consider inactive default routes if "true" (optional)
network_find_wan()  { __network_wan "$1" 4 "${2:-0}"; }

# find the logical interface which holds the current IPv6 default route
# 1: destination variable
# 2: consider inactive dafault routes if "true" (optional)
network_find_wan6() { __network_wan "$1" 6 "${2:-0}"; }


__network_device()
{
	local __var="$1"
	local __iface="$2"
	local __field="$3"

	__network_parse_ifstatus "$__iface" || return 1
	__network_export "$__var" "${__iface}_${__field}"
	return $?
}

# test whether the given logical interface is running
# 1: interface
network_is_up()
{
	local __up
	__network_device __up "$1" up && [ $__up -eq 1 ]
}

# determine the layer 3 linux network device of the given logical interface
# 1: destination variable
# 2: interface
network_get_device()  { __network_device "$1" "$2" l3_device; }

# determine the layer 2 linux network device of the given logical interface
# 1: destination variable
# 2: interface
network_get_physdev() { __network_device "$1" "$2" device;    }


__network_defer()
{
	local __device="$1"
	local __defer="$2"

	json_init
	json_add_string name "$__device"
	json_add_boolean defer "$__defer"

	ubus call network.device set_state "$(json_dump)" 2>/dev/null
}

# defer netifd actions on the given linux network device
# 1: device name
network_defer_device() { __network_defer "$1" 1; }

# continue netifd actions on the given linux network device
# 1: device name
network_ready_device() { __network_defer "$1" 0; }

# flush the internal value cache to force re-reading values from ubus
network_flush_cache()
{
	local __tmp
	for __tmp in $__NETWORK_CACHE __NETWORK_CACHE; do
		unset "$__tmp"
	done
}