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stop_interface_ppp() {
local cfg="$1"
local proto
config_get proto "$cfg" proto
local link="$proto-$cfg"
service_kill pppd "/var/run/ppp-${link}.pid"
remove_dns "$cfg"
local lock="/var/lock/ppp-$link"
[ -f "$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 $peer_default
[ "$peerdns" -eq 1 ] && {
peerdns="usepeerdns"
} || {
peerdns=""
add_dns "$cfg" $dns
}
local demand
config_get demand "$cfg" demand 0
local demandargs
[ "$demand" -gt 0 ] && {
demandargs="precompiled-active-filter /etc/ppp/filter demand idle $demand"
[ "$has_dns" -eq 0 ] && add_dns "$cfg" 1.1.1.1
} || {
demandargs="persist"
}
local ipv6
config_get_bool ipv6 "$cfg" ipv6 0
[ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""
start-stop-daemon -S -b -x /usr/sbin/pppd -m -p /var/run/ppp-$link.pid -- "$@" \
${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
$demandargs \
$peerdns \
$defaultroute \
${username:+user "$username" password "$password"} \
ipparam "$cfg" \
ifname "$link" \
${connect:+connect "$connect"} \
${disconnect:+disconnect "$disconnect"} \
${ipv6} \
${pppd_options} \
nodetach
lock -u "/var/lock/ppp-${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"
}
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