package/ppp/files/ppp.sh

   1 scan_ppp() {
   2         config_get ifname "$1" ifname
   3         pppdev="${pppdev:-0}"
   4         config_set "$1" ifname "ppp$pppdev"
   5         config_set "$1" unit "$pppdev"
   6         pppdev="$(($pppdev + 1))"
   7 }
   8
   9 start_pppd() {
  10         local cfg="$1"; shift
  11
  12         # make sure only one pppd process is started
  13         lock "/var/lock/ppp-${cfg}"
  14         local pid="$(head -n1 /var/run/ppp-${cfg}.pid 2>/dev/null)"
  15         [ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
  16                 lock -u "/var/lock/ppp-${cfg}"
  17                 return 0
  18         }
  19
  20         config_get device "$cfg" device
  21         config_get unit "$cfg" unit
  22         config_get username "$cfg" username
  23         config_get password "$cfg" password
  24         config_get keepalive "$cfg" keepalive
  25
  26         config_get connect "$cfg" connect
  27         config_get disconnect "$cfg" disconnect
  28         config_get pppd_options "$cfg" pppd_options
  29
  30         interval="${keepalive##*[, ]}"
  31         [ "$interval" != "$keepalive" ] || interval=5
  32
  33         config_get demand "$cfg" demand
  34         [ -n "$demand" ] && echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto
  35         /usr/sbin/pppd "$@" \
  36                 ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
  37                 ${demand:+precompiled-active-filter /etc/ppp/filter demand idle }${demand:-persist} \
  38                 usepeerdns \
  39                 defaultroute \
  40                 replacedefaultroute \
  41                 ${username:+user "$username" password "$password"} \
  42                 unit "$pppdev" \
  43                 linkname "$cfg" \
  44                 ipparam "$cfg" \
  45                 ${connect:+connect "$connect"} \
  46                 ${disconnect:+disconnect "$disconnect"} \
  47                 ${pppd_options}
  48
  49         lock -u "/var/lock/ppp-${cfg}"
  50 }
  51
  52 setup_interface_ppp() {
  53         local iface="$1"
  54         local config="$2"
  55
  56         config_get device "$config" device
  57
  58         config_get mtu "$cfg" mtu
  59         mtu=${mtu:-1492}
  60         start_pppd "$config" \
  61                 mtu $mtu mru $mtu \
  62                 "$device"
  63 }
  64