scan_ppp() { config_get ifname "$1" ifname pppdev="${pppdev:-0}" config_get unit "$1" unit [ -z "$unit" ] && { unit="$pppdev" if [ "${ifname%%[0-9]*}" = ppp ]; then unit="${ifname##ppp}" [ "$pppdev" -le "$unit" ] && pppdev="$(($unit + 1))" else pppdev="$(($pppdev + 1))" 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-${cfg}" return 0 } # Workaround: sometimes hotplug2 doesn't deliver the hotplug event for creating # /dev/ppp fast enough to be used here [ -e /dev/ppp ] || mknod /dev/ppp c 108 0 config_get device "$cfg" device config_get unit "$cfg" unit config_get username "$cfg" username config_get password "$cfg" password config_get keepalive "$cfg" keepalive config_get connect "$cfg" connect config_get disconnect "$cfg" disconnect config_get pppd_options "$cfg" pppd_options config_get_bool defaultroute "$cfg" defaultroute 1 [ "$defaultroute" -eq 1 ] && defaultroute="defaultroute replacedefaultroute" || defaultroute="" interval="${keepalive##*[, ]}" [ "$interval" != "$keepalive" ] || interval=5 config_get_bool peerdns "$cfg" peerdns 1 [ "$peerdns" -eq 1 ] && peerdns="usepeerdns" || { peerdns="" config_get dns "$config" dns for dns in $dns; do grep -q "$dns" /tmp/resolv.conf.auto 2>/dev/null || \ echo "nameserver $dns" >> /tmp/resolv.conf.auto done } config_get demand "$cfg" demand [ -n "$demand" ] && echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto config_get_bool ipv6 "$cfg" ipv6 0 [ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6="" /usr/sbin/pppd "$@" \ ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \ ${demand:+precompiled-active-filter /etc/ppp/filter demand idle }${demand:-persist} \ $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="$2" config_get device "$config" device config_get mtu "$config" mtu mtu=${mtu:-1492} start_pppd "$config" \ mtu $mtu mru $mtu \ "$device" }