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="$1"; shift
  20         local ifname
  21
  22         # make sure the network state references the correct ifname
  23         scan_ppp "$cfg"
  24         config_get ifname "$cfg" ifname
  25         set_interface_ifname "$cfg" "$ifname"
  26
  27         # make sure only one pppd process is started
  28         lock "/var/lock/ppp-${cfg}"
  29         local pid="$(head -n1 /var/run/ppp-${cfg}.pid 2>/dev/null)"
  30         [ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
  31                 lock -u "/var/lock/ppp-${cfg}"
  32                 return 0
  33         }
  34
  35         # Workaround: sometimes hotplug2 doesn't deliver the hotplug event for creating
  36         # /dev/ppp fast enough to be used here
  37         [ -e /dev/ppp ] || mknod /dev/ppp c 108 0
  38
  39         config_get device "$cfg" device
  40         config_get unit "$cfg" unit
  41         config_get username "$cfg" username
  42         config_get password "$cfg" password
  43         config_get keepalive "$cfg" keepalive
  44
  45         config_get connect "$cfg" connect
  46         config_get disconnect "$cfg" disconnect
  47         config_get pppd_options "$cfg" pppd_options
  48         config_get_bool defaultroute "$cfg" defaultroute 1
  49         [ "$defaultroute" -eq 1 ] && defaultroute="defaultroute replacedefaultroute" || defaultroute=""
  50
  51         interval="${keepalive##*[, ]}"
  52         [ "$interval" != "$keepalive" ] || interval=5
  53
  54         config_get_bool peerdns "$cfg" peerdns 1
  55         [ "$peerdns" -eq 1 ] && peerdns="usepeerdns" || {
  56                 peerdns=""
  57                 config_get dns "$config" dns
  58                 for dns in $dns; do
  59                         grep -q "$dns" /tmp/resolv.conf.auto 2>/dev/null || \
  60                                 echo "nameserver $dns" >> /tmp/resolv.conf.auto
  61                 done
  62         }
  63
  64         config_get demand "$cfg" demand
  65         [ -n "$demand" ] && echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto
  66
  67         config_get_bool ipv6 "$cfg" ipv6 0
  68         [ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""
  69
  70         /usr/sbin/pppd "$@" \
  71                 ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
  72                 ${demand:+precompiled-active-filter /etc/ppp/filter demand idle }${demand:-persist} \
  73                 $peerdns \
  74                 $defaultroute \
  75                 ${username:+user "$username" password "$password"} \
  76                 unit "$unit" \
  77                 linkname "$cfg" \
  78                 ipparam "$cfg" \
  79                 ${connect:+connect "$connect"} \
  80                 ${disconnect:+disconnect "$disconnect"} \
  81                 ${ipv6} \
  82                 ${pppd_options}
  83
  84         lock -u "/var/lock/ppp-${cfg}"
  85 }
  86
  87 setup_interface_ppp() {
  88         local iface="$1"
  89         local config="$2"
  90
  91         config_get device "$config" device
  92
  93         config_get mtu "$config" mtu
  94         mtu=${mtu:-1492}
  95         start_pppd "$config" \
  96                 mtu $mtu mru $mtu \
  97                 "$device"
  98 }
  99