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scan_ppp() {
config_get ifname "$1" ifname
pppdev="${pppdev:-0}"
config_get devunit "$1" unit
{
unit=
pppif=
if [ ! -d /tmp/.ppp-counter ]; then
mkdir -p /tmp/.ppp-counter
fi
local maxunit
maxunit="$(cat /tmp/.ppp-counter/max-unit 2>/dev/null)"
if [ -z "$maxunit" ]; then
maxunit=-1
fi
local i
i=0
while [ $i -le $maxunit ]; do
local unitdev
unitdev="$(cat /tmp/.ppp-counter/ppp${i} 2>/dev/null)"
if [ "$unitdev" = "$1" ]; then
unit="$i"
pppif="ppp${i}"
break
fi
i="$(($i + 1))"
done
if [ -z "$unit" ] || [ -z "$pppif" ]; then
maxunit="$(($maxunit + 1))"
if [ -n "$devunit" ]; then
unit="$devunit"
elif [ "${ifname%%[0-9]*}" = ppp ]; then
unit="${ifname##ppp}"
else
unit="$maxunit"
fi
[ "$maxunit" -lt "$unit" ] && maxunit="$unit"
pppif="ppp${unit}"
echo "$1" >/tmp/.ppp-counter/$pppif 2>/dev/null
echo "$maxunit" >/tmp/.ppp-counter/max-unit 2>/dev/null
fi
config_set "$1" ifname "ppp$unit"
config_set "$1" unit "$unit"
}
}
start_pppd() {
local cfg="$1"; shift
local ifname
# make sure the network state references the correct ifname
scan_ppp "$cfg"
config_get ifname "$cfg" ifname
set_interface_ifname "$cfg" "$ifname"
# make sure only one pppd process is started
lock "/var/lock/ppp-${cfg}"
local pid="$(head -n1 /var/run/ppp-${cfg}.pid 2>/dev/null)"
[ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
lock -u "/var/lock/ppp-${cfg}"
return 0
}
# Workaround: sometimes hotplug2 doesn't deliver the hotplug event for creating
# /dev/ppp fast enough to be used here
[ -e /dev/ppp ] || mknod /dev/ppp c 108 0
local device
config_get device "$cfg" device
local unit
config_get unit "$cfg" unit
local username
config_get username "$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
[ "$defaultroute" -eq 1 ] && defaultroute="defaultroute replacedefaultroute" || defaultroute=""
local interval="${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 $peer_default
echo -n "" > /tmp/resolv.conf.auto
[ "$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 "$password"} \
unit "$unit" \
linkname "$cfg" \
ipparam "$cfg" \
${connect:+connect "$connect"} \
${disconnect:+disconnect "$disconnect"} \
${ipv6} \
${pppd_options}
lock -u "/var/lock/ppp-${cfg}"
}
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"
}
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