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