summaryrefslogtreecommitdiff
path: root/package/ppp/files/ppp.sh
blob: f4417bb67ec1b78b5be8f1f71fae4ad617c2a264 (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
stop_interface_ppp() {
	local cfg="$1"

	local proto
	config_get proto "$cfg" proto

	local ifname
	config_get ifname "$cfg" ifname

	[ -f "/var/run/ppp-${ifname}.pid" ] && {
		local pid="$(head -n1 /var/run/ppp-${ifname}.pid 2>/dev/null)"
		grep -qs pppd "/proc/$pid/cmdline" && kill -TERM $pid && \
			while grep -qs pppd "/proc/$pid/cmdline"; do sleep 1; done
		rm -f "/var/run/ppp-${ifname}.pid"
	}

	local lock="/var/lock/ppp-$ifname"
	[ -f "$lock" ] && lock -u "$lock"
}

start_pppd() {
	local cfg="$1"; shift

	local proto
	config_get proto "$cfg" proto

	# unique link identifier
	local link="${proto:-ppp}-$cfg"

	# make sure only one pppd process is started
	lock "/var/lock/ppp-${link}"
	local pid="$(head -n1 /var/run/ppp-${link}.pid 2>/dev/null)"
	[ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
		lock -u "/var/lock/ppp-${link}"
		return 0
	}

	# Workaround: sometimes hotplug2 doesn't deliver the hotplug event for creating
	# /dev/ppp fast enough to be used here
	[ -e /dev/ppp ] || mknod /dev/ppp c 108 0

	local device
	config_get device "$cfg" device

	local username
	config_get username "$cfg" username

	local password
	config_get password "$cfg" password

	local keepalive
	config_get keepalive "$cfg" keepalive

	local connect
	config_get connect "$cfg" connect

	local disconnect
	config_get disconnect "$cfg" disconnect

	local pppd_options
	config_get pppd_options "$cfg" pppd_options

	local defaultroute
	config_get_bool defaultroute "$cfg" defaultroute 1
	[ "$defaultroute" -eq 1 ] && \
		defaultroute="defaultroute replacedefaultroute" || defaultroute="nodefaultroute"

	local interval="${keepalive##*[, ]}"
	[ "$interval" != "$keepalive" ] || interval=5

	local dns
	config_get dns "$config" dns

	local has_dns=0
	local peer_default=1
	[ -n "$dns" ] && {
		has_dns=1
		peer_default=0
	}

	local peerdns
	config_get_bool peerdns "$cfg" peerdns $peer_default

	if [ "$peerdns" -eq 1 ] || [ ! -e /tmp/resolv.conf.auto ]; then
		echo -n "" > /tmp/resolv.conf.auto
	fi

	[ "$peerdns" -eq 1 ] && {
		peerdns="usepeerdns"
	} || {
		peerdns=""
		for dns in $dns; do
			echo "nameserver $dns" >> /tmp/resolv.conf.auto
		done
	}

	local demand
	config_get_bool demand "$cfg" demand 0

	local demandargs
	[ "$demand" -eq 1 ] && {
		demandargs="precompiled-active-filter /etc/ppp/filter demand idle"
		[ "$has_dns" -eq 0 ] && \
			echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto
	} || {
		demandargs="persist"
	}

	local ipv6
	config_get_bool ipv6 "$cfg" ipv6 0
	[ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""

	/usr/sbin/pppd "$@" \
		${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
		$demandargs \
		$peerdns \
		$defaultroute \
		${username:+user "$username" password "$password"} \
		linkname "$link" \
		ipparam "$cfg" \
		ifname "$link" \
		${connect:+connect "$connect"} \
		${disconnect:+disconnect "$disconnect"} \
		${ipv6} \
		${pppd_options}

	lock -u "/var/lock/ppp-${link}"
}

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

	local device
	config_get device "$config" device

	local mtu
	config_get mtu "$config" mtu

	mtu=${mtu:-1492}
	start_pppd "$config" \
		mtu $mtu mru $mtu \
		"$device"
}