summaryrefslogtreecommitdiff
path: root/package/base-files/files/lib/network/config.sh
blob: e68223e2777c0c6fb7218e11dccc6ec7a273abb6 (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
#!/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 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 "$CONFIG_SECTION" ifname
				config_set "$CONFIG_SECTION" device "$ifname"
				case "$iftype" in
					bridge)
						config_set "$CONFIG_SECTION" ifnames "$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 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##*\.}"
	}
}

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

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

	proto="${3:-$(config_get "$config" proto)}"
	config_get iftype "$config" type
	
	ifconfig "$iface" 2>/dev/null >/dev/null && {
		# make sure the interface is removed from any existing bridge and brought down
		ifconfig "$iface" down
		unbridge "$iface"
	}

	# Setup VLAN interfaces
	add_vlan "$iface"

	# Setup bridging
	case "$iftype" in
		bridge)
			[ -x /usr/sbin/brctl ] && {
				ifconfig "$iface" up 2>/dev/null >/dev/null
				ifconfig "br-$config" 2>/dev/null >/dev/null && {
					$DEBUG brctl addif "br-$config" "$iface"
					return 0
				} || {
					$DEBUG brctl addbr "br-$config"
					$DEBUG brctl setfd "br-$config" 0
					$DEBUG brctl addif "br-$config" "$iface"
					iface="br-$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
				}
			}
		;;
	esac
	
	# Interface settings
	config_get mtu "$config" mtu
	config_get macaddr "$config" macaddr
	$DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up

	pidfile="/var/run/$iface.pid"
	case "$proto" in
		static)
			config_get ipaddr "$config" ipaddr
			config_get netmask "$config" netmask
			[ -z "$ipaddr" -o -z "$netmask" ] && return 1
			
			config_get ip6addr "$config" ip6addr
			config_get gateway "$config" gateway
			config_get dns "$config" dns
			
			[ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
			[ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" inet6 add "$ip6addr" 
			[ -z "$gateway" ] || route add default gw "$gateway"
			[ -z "$dns" -o -f /tmp/resolv.conf.auto ] || {
				for ns in $dns; do
					echo "nameserver $ns" >> /tmp/resolv.conf.auto
				done
			}

			env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug "iface" &
		;;
		dhcp)
			# prevent udhcpc from starting more than once
			lock "/var/lock/dhcp-$iface"
			pid="$(cat "$pidfile" 2>/dev/null)"
			[ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
				lock -u "/var/lock/dhcp-$iface"
				return 0
			}

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

			[ -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 $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
			lock -u "/var/lock/dhcp-$iface"
		;;
		*)
			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
}

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

	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
	}
}