blob: 16ac026d6eb2f44d9ec74dde1e7f69e7f5f3f65b (
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
|
#!/bin/sh
[ -x /usr/sbin/xl2tpd ] || exit 0
[ -n "$INCLUDE_ONLY" ] || {
. /lib/functions.sh
. /lib/functions/network.sh
. ../netifd-proto.sh
init_proto "$@"
}
proto_l2tp_select_ipaddr()
{
local subnets=$1
local res
local res_mask
for subnet in $subnets; do
local addr="${subnet%%/*}"
local mask="${subnet#*/}"
if [ -n "$res_mask" -a "$mask" != 32 ]; then
[ "$mask" -gt "$res_mask" ] || [ "$res_mask" = 32 ] && {
res="$addr"
res_mask="$mask"
}
elif [ -z "$res_mask" ]; then
res="$addr"
res_mask="$mask"
fi
done
echo "$res"
}
proto_l2tp_init_config() {
proto_config_add_string "username"
proto_config_add_string "password"
proto_config_add_string "keepalive"
proto_config_add_string "pppd_options"
proto_config_add_boolean "ipv6"
proto_config_add_int "mtu"
proto_config_add_int "checkup_interval"
proto_config_add_string "server"
proto_config_add_string "hostname"
proto_config_add_string "unnumbered"
available=1
no_device=1
no_proto_task=1
teardown_on_l3_link_down=1
}
proto_l2tp_setup() {
local interface="$1"
local optfile="/tmp/l2tp/options.${interface}"
local ip serv_addr server host hostname
json_get_vars server hostname
host="${server%:*}"
for ip in $(resolveip -t 5 "$host"); do
( proto_add_host_dependency "$interface" "$ip" )
serv_addr=1
done
[ -n "$serv_addr" ] || {
echo "Could not resolve server address" >&2
sleep 5
proto_setup_failed "$interface"
exit 1
}
hostname="${hostname:+hostname=$hostname}"
# Start and wait for xl2tpd
if [ ! -p /var/run/xl2tpd/l2tp-control -o -z "$(pidof xl2tpd)" ]; then
/etc/init.d/xl2tpd restart
local wait_timeout=0
while [ ! -p /var/run/xl2tpd/l2tp-control ]; do
wait_timeout=$(($wait_timeout + 1))
[ "$wait_timeout" -gt 5 ] && {
echo "Cannot find xl2tpd control file." >&2
proto_setup_failed "$interface"
exit 1
}
sleep 1
done
fi
local ipv6 keepalive username password pppd_options mtu unnumbered localip
json_get_vars ipv6 keepalive username password pppd_options mtu unnumbered
[ "$ipv6" = 1 ] || ipv6=""
local interval="${keepalive##*[, ]}"
[ "$interval" != "$keepalive" ] || interval=5
keepalive="${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}}"
username="${username:+user \"$username\" password \"$password\"}"
ipv6="${ipv6:++ipv6}"
mtu="${mtu:+mtu $mtu mru $mtu}"
[ -n "$unnumbered" ] && {
local subnets
( proto_add_host_dependency "$interface" "" "$unnumbered" )
network_get_subnets subnets "$unnumbered"
localip=$(proto_l2tp_select_ipaddr "$subnets")
[ -n "$localip" ] || {
proto_block_restart "$interface"
return
}
localip="${localip:+$localip:}"
}
mkdir -p /tmp/l2tp
cat <<EOF >"$optfile"
usepeerdns
nodefaultroute
ipparam "$interface"
ifname "l2tp-$interface"
ip-up-script /lib/netifd/ppp-up
ipv6-up-script /lib/netifd/ppp-up
ip-down-script /lib/netifd/ppp-down
ipv6-down-script /lib/netifd/ppp-down
# Don't wait for LCP term responses; exit immediately when killed.
lcp-max-terminate 0
$keepalive
$username
$ipv6
$mtu
$localip
$pppd_options
EOF
xl2tpd-control add-lac l2tp-${interface} pppoptfile=${optfile} lns=${server} ${hostname} || {
echo "xl2tpd-control: Add l2tp-$interface failed" >&2
proto_setup_failed "$interface"
exit 1
}
xl2tpd-control connect-lac l2tp-${interface} || {
echo "xl2tpd-control: Connect l2tp-$interface failed" >&2
proto_setup_failed "$interface"
exit 1
}
}
proto_l2tp_teardown() {
local interface="$1"
local optfile="/tmp/l2tp/options.${interface}"
rm -f ${optfile}
if [ -p /var/run/xl2tpd/l2tp-control ]; then
xl2tpd-control remove-lac l2tp-${interface} || {
echo "xl2tpd-control: Remove l2tp-$interface failed" >&2
}
fi
# Wait for interface to go down
while [ -d /sys/class/net/l2tp-${interface} ]; do
sleep 1
done
}
[ -n "$INCLUDE_ONLY" ] || {
add_protocol l2tp
}
|
