package/ppp/files/ppp.sh

   1 scan_ppp() {
   2         config_get ifname "$1" ifname
   3         pppdev="${pppdev:-0}"
   4         config_get unit "$1" unit
   5         [ -z "$unit" ] && {
   6                 unit="$pppdev"
   7                 if [ "${ifname%%[0-9]*}" = ppp ]; then
   8                         unit="${ifname##ppp}"
   9                         [ "$pppdev" -le "$unit" ] && pppdev="$(($unit + 1))"
  10                 else
  11                         pppdev="$(($pppdev + 1))"
  12                 fi
  13                 config_set "$1" ifname "ppp$unit"
  14                 config_set "$1" unit "$unit"
  15         }
  16 }
  17
  18 start_pppd() {
  19         local cfg="$1"; shift
  20
  21         # make sure only one pppd process is started
  22         lock "/var/lock/ppp-${cfg}"
  23         local pid="$(head -n1 /var/run/ppp-${cfg}.pid 2>/dev/null)"
  24         [ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
  25                 lock -u "/var/lock/ppp-${cfg}"
  26                 return 0
  27         }
  28
  29         # Workaround: sometimes hotplug2 doesn't deliver the hotplug event for creating
  30         # /dev/ppp fast enough to be used here
  31         [ -e /dev/ppp ] || mknod /dev/ppp c 108 0
  32
  33         config_get device "$cfg" device
  34         config_get unit "$cfg" unit
  35         config_get username "$cfg" username
  36         config_get password "$cfg" password
  37         config_get keepalive "$cfg" keepalive
  38
  39         config_get connect "$cfg" connect
  40         config_get disconnect "$cfg" disconnect
  41         config_get pppd_options "$cfg" pppd_options
  42         config_get_bool defaultroute "$cfg" defaultroute 1
  43         [ "$defaultroute" -eq 1 ] && defaultroute="defaultroute replacedefaultroute" || defaultroute=""
  44
  45         interval="${keepalive##*[, ]}"
  46         [ "$interval" != "$keepalive" ] || interval=5
  47
  48         config_get_bool peerdns "$cfg" peerdns 1
  49         [ "$peerdns" -eq 1 ] && peerdns="usepeerdns" || peerdns=""
  50
  51         config_get demand "$cfg" demand
  52         [ -n "$demand" ] && echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto
  53
  54         config_get_bool ipv6 "$cfg" ipv6 0
  55         [ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""
  56
  57         /usr/sbin/pppd "$@" \
  58                 ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
  59                 ${demand:+precompiled-active-filter /etc/ppp/filter demand idle }${demand:-persist} \
  60                 $peerdns \
  61                 $defaultroute \
  62                 ${username:+user "$username" password "$password"} \
  63                 unit "$unit" \
  64                 linkname "$cfg" \
  65                 ipparam "$cfg" \
  66                 ${connect:+connect "$connect"} \
  67                 ${disconnect:+disconnect "$disconnect"} \
  68                 ${ipv6} \
  69                 ${pppd_options}
  70
  71         lock -u "/var/lock/ppp-${cfg}"
  72 }
  73
  74 setup_interface_ppp() {
  75         local iface="$1"
  76         local config="$2"
  77
  78         config_get device "$config" device
  79
  80         config_get mtu "$config" mtu
  81         mtu=${mtu:-1492}
  82         start_pppd "$config" \
  83                 mtu $mtu mru $mtu \
  84                 "$device"
  85 }
  86