summaryrefslogtreecommitdiff
path: root/package/base-files/files/lib/network/config.sh
blob: 1bbe6232e4c77826abb12f201cb77bb5035091d5 (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
#!/bin/sh
# Copyright (C) 2006 OpenWrt.org

# DEBUG="echo"

find_config() {
	local iftype device iface ifaces ifn
	for ifn in $interfaces; do
		config_get iftype "$ifn" type
		config_get iface "$ifn" ifname
		case "$iftype" in
			bridge) config_get ifaces "$ifn" ifnames;;
		esac
		config_get device "$ifn" device
		for ifc in $device $iface $ifaces; do
			[ ."$ifc" = ."$1" ] && {
				echo "$ifn"
				return 0
			}
		done
	done

	return 1;
}

scan_interfaces() {
	local cfgfile="$1"
	local mode iftype iface ifname device
	interfaces=
	config_cb() {
		case "$1" in
			interface)
				config_set "$2" auto 1
			;;
		esac
		config_get iftype "$CONFIG_SECTION" TYPE
		case "$iftype" in
			interface)
				config_get proto "$CONFIG_SECTION" proto
				append interfaces "$CONFIG_SECTION"
				config_get iftype "$CONFIG_SECTION" type
				config_get ifname "$CONFIG_SECTION" ifname
				config_get device "$CONFIG_SECTION" device
				config_set "$CONFIG_SECTION" device "${device:-$ifname}"
				case "$iftype" in
					bridge)
						config_set "$CONFIG_SECTION" ifnames "${device:-$ifname}"
						config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
					;;
				esac
				( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
			;;
		esac
	}
	config_load "${cfgfile:-network}"
}

add_vlan() {
	local vif="${1%\.*}"

	[ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
		ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
		$DEBUG vconfig add "$vif" "${1##*\.}"
		return 0
	}
	return 1
}

# sort the device list, drop duplicates
sort_list() {
	local arg="$*"
	(
		for item in $arg; do
			echo "$item"
		done
	) | sort -u
}

# Create the interface, if necessary.
# Return status 0 indicates that the setup_interface() call should continue
# Return status 1 means that everything is set up already.

prepare_interface() {
	local iface="$1"
	local config="$2"
	local vifmac="$3"
	local proto

	# if we're called for the bridge interface itself, don't bother trying
	# to create any interfaces here. The scripts have already done that, otherwise
	# the bridge interface wouldn't exist.
	[ "br-$config" = "$iface" -o -e "$iface" ] && return 0;

	ifconfig "$iface" 2>/dev/null >/dev/null && {
		config_get proto "$config" proto

		# make sure the interface is removed from any existing bridge and deconfigured,
		# (deconfigured only if the interface is not set to proto=none)
		unbridge "$iface"
		[ "$proto" = none ] || ifconfig "$iface" 0.0.0.0

		# Change interface MAC address if requested
		[ -n "$vifmac" ] && {
			ifconfig "$iface" down
			ifconfig "$iface" hw ether "$vifmac" up
		}
	}

	# Setup VLAN interfaces
	add_vlan "$iface" && return 1
	ifconfig "$iface" 2>/dev/null >/dev/null || return 0

	# Setup bridging
	config_get iftype "$config" type
	config_get stp "$config" stp
	case "$iftype" in
		bridge)
			[ -x /usr/sbin/brctl ] && {
				ifconfig "br-$config" 2>/dev/null >/dev/null && {
					local newdevs=

					config_get devices "$config" device
					for dev in $(sort_list "$devices" "$iface"); do
						append newdevs "$dev"
					done
					uci_set_state network "$config" device "$newdevs"
					$DEBUG brctl addif "br-$config" "$iface"
					# Bridge existed already. No further processing necesary
				} || {
					$DEBUG brctl addbr "br-$config"
					$DEBUG brctl setfd "br-$config" 0
					$DEBUG ifconfig "br-$config" up
					$DEBUG brctl addif "br-$config" "$iface"
					$DEBUG brctl stp "br-$config" ${stp:-0}
					# Creating the bridge here will have triggered a hotplug event, which will
					# result in another setup_interface() call, so we simply stop processing
					# the current event at this point.
				}
				ifconfig "$iface" up 2>/dev/null >/dev/null
				return 1
			}
		;;
	esac
	return 0
}

set_interface_ifname() {
	local config="$1"
	local ifname="$2"

	config_get device "$1" device
	uci_set_state network "$config" ifname "$ifname"
	uci_set_state network "$config" device "$device"
}

setup_interface_none() {
	env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
}

setup_interface_static() {
	local iface="$1"
	local config="$2"

	config_get ipaddr "$config" ipaddr
	config_get netmask "$config" netmask
	config_get ip6addr "$config" ip6addr
	[ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1

	config_get gateway "$config" gateway
	config_get ip6gw "$config" ip6gw
	config_get dns "$config" dns
	config_get bcast "$config" broadcast

	[ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
	[ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
	[ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface"
	[ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface"
	[ -z "$dns" ] || {
		for ns in $dns; do
			grep "$ns" /tmp/resolv.conf.auto 2>/dev/null >/dev/null || {
				echo "nameserver $ns" >> /tmp/resolv.conf.auto
			}
		done
	}

	config_get type "$config" TYPE
	[ "$type" = "alias" ] && return 0

	env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
}

setup_interface_alias() {
	local config="$1"
	local parent="$2"
	local iface="$3"

	config_get cfg "$config" interface
	[ "$parent" == "$cfg" ] || return 0

	# alias counter
	config_get ctr "$parent" alias_count
	ctr="$(($ctr + 1))"
	config_set "$parent" alias_count "$ctr"

	# alias list
	config_get list "$parent" aliases
	append list "$config"
	config_set "$parent" aliases "$list"

	set_interface_ifname "$config" "$iface:$ctr"
	config_get proto "$config" proto
	case "${proto:-static}" in
		static)
			setup_interface_static "$iface:$ctr" "$config"
		;;
		*)
			echo "Unsupported type '$proto' for alias config '$config'"
			return 1
		;;
	esac
}

setup_interface() {
	local iface="$1"
	local config="$2"
	local vifmac="$4"
	local proto
	local macaddr
	local hasipv6

	[ -n "$config" ] || {
		config=$(find_config "$iface")
		[ "$?" = 0 ] || return 1
	}
	proto="${3:-$(config_get "$config" proto)}"

	prepare_interface "$iface" "$config" "$vifmac" || return 0

	[ "$iface" = "br-$config" ] && {
		# need to bring up the bridge and wait a second for
		# it to switch to the 'forwarding' state, otherwise
		# it will lose its routes...
		ifconfig "$iface" up
		sleep 1
	}

	# Check whether this interface has an IPv6 address
	# defined and ensure that the kmod is loaded since
	# ifup could be triggered before modules are loaded.
	config_get hasipv6 "$config" ip6addr
	[ -n "$hasipv6" ] && [ ! -d /proc/sys/net/ipv6 ] && {
		grep -q '^ipv6' /etc/modules.d/* && insmod ipv6
	}

	# Interface settings
	config_get mtu "$config" mtu
	config_get macaddr "$config" macaddr
	grep "$iface:" /proc/net/dev > /dev/null && {
		[ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
		$DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
	}
	set_interface_ifname "$config" "$iface"

	pidfile="/var/run/$iface.pid"
	case "$proto" in
		static)
			setup_interface_static "$iface" "$config"
		;;
		dhcp)
			# prevent udhcpc from starting more than once
			lock "/var/lock/dhcp-$iface"
			pid="$(cat "$pidfile" 2>/dev/null)"
			if [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null; then
				lock -u "/var/lock/dhcp-$iface"
			else

				config_get ipaddr "$config" ipaddr
				config_get netmask "$config" netmask
				config_get hostname "$config" hostname
				config_get proto1 "$config" proto
				config_get clientid "$config" clientid

				[ -z "$ipaddr" ] || \
					$DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}

				# don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
				[ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
				$DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -R &}
				lock -u "/var/lock/dhcp-$iface"
			fi
		;;
		none)
			setup_interface_none "$iface" "$config"
		;;
		*)
			if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
				eval "setup_interface_$proto '$iface' '$config' '$proto'"
			else
				echo "Interface type $proto not supported."
				return 1
			fi
		;;
	esac
	[ "$proto" = none ] || {
		for ifn in `ifconfig | grep "^$iface:" | awk '{print $1}'`; do
			ifconfig "$ifn" down
		done
	}
	config_set "$config" aliases ""
	config_set "$config" alias_count 0
	config_foreach setup_interface_alias alias "$config" "$iface"
	config_get aliases "$config" aliases
	[ -z "$aliases" ] || uci_set_state network "$config" aliases "$aliases"
}

unbridge() {
	local dev="$1"
	local brdev

	[ -x /usr/sbin/brctl ] || return 0
	brctl show | grep "$dev" >/dev/null && {
		# interface is still part of a bridge, correct that

		for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
			brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
		done
	}
}