package/ppp/files/ppp.sh

   1 scan_ppp() {
   2         config_get ifname "$1" ifname
   3         pppdev="${pppdev:-0}"
   4         config_get devunit "$1" unit
   5         {
   6                 unit=
   7                 pppif=
   8                 if [ ! -d /tmp/.ppp-counter ]; then
   9                      mkdir -p /tmp/.ppp-counter
  10                 fi
  11                 local maxunit
  12                 maxunit="$(cat /tmp/.ppp-counter/max-unit 2>/dev/null)"
  13                 if [ -z "$maxunit" ]; then
  14                     maxunit=-1
  15                 fi
  16                 local i
  17                 i=0
  18                 while [ $i -le $maxunit ]; do
  19                      local unitdev
  20                      unitdev="$(cat /tmp/.ppp-counter/ppp${i} 2>/dev/null)"
  21                      if [ "$unitdev" = "$1" ]; then
  22                           unit="$i"
  23                           pppif="ppp${i}"
  24                           break
  25                      fi
  26                      i="$(($i + 1))"
  27                 done
  28                 if [ -z "$unit" ] || [ -z "$pppif" ]; then
  29                     maxunit="$(($maxunit + 1))"
  30                     if [ -n "$devunit" ]; then
  31                         unit="$devunit"
  32                     elif [ "${ifname%%[0-9]*}" = ppp ]; then
  33                          unit="${ifname##ppp}"
  34                     else
  35                          unit="$maxunit"
  36                     fi
  37                     [ "$maxunit" -lt "$unit" ] && maxunit="$unit"
  38                     pppif="ppp${unit}"
  39                     echo "$1" >/tmp/.ppp-counter/$pppif 2>/dev/null
  40                     echo "$maxunit" >/tmp/.ppp-counter/max-unit 2>/dev/null
  41                 fi
  42                 config_set "$1" ifname "ppp$unit"
  43                 config_set "$1" unit "$unit"
  44         }
  45 }
  46
  47 start_pppd() {
  48         local cfg="$1"; shift
  49         local ifname
  50
  51         # make sure the network state references the correct ifname
  52         scan_ppp "$cfg"
  53         config_get ifname "$cfg" ifname
  54         set_interface_ifname "$cfg" "$ifname"
  55
  56         # make sure only one pppd process is started
  57         lock "/var/lock/ppp-${cfg}"
  58         local pid="$(head -n1 /var/run/ppp-${cfg}.pid 2>/dev/null)"
  59         [ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
  60                 lock -u "/var/lock/ppp-${cfg}"
  61                 return 0
  62         }
  63
  64         # Workaround: sometimes hotplug2 doesn't deliver the hotplug event for creating
  65         # /dev/ppp fast enough to be used here
  66         [ -e /dev/ppp ] || mknod /dev/ppp c 108 0
  67
  68         config_get device "$cfg" device
  69         config_get unit "$cfg" unit
  70         config_get username "$cfg" username
  71         config_get password "$cfg" password
  72         config_get keepalive "$cfg" keepalive
  73
  74         config_get connect "$cfg" connect
  75         config_get disconnect "$cfg" disconnect
  76         config_get pppd_options "$cfg" pppd_options
  77         config_get_bool defaultroute "$cfg" defaultroute 1
  78         [ "$defaultroute" -eq 1 ] && defaultroute="defaultroute replacedefaultroute" || defaultroute=""
  79
  80         interval="${keepalive##*[, ]}"
  81         [ "$interval" != "$keepalive" ] || interval=5
  82
  83         config_get_bool peerdns "$cfg" peerdns 1
  84         [ "$peerdns" -eq 1 ] && peerdns="usepeerdns" || {
  85                 peerdns=""
  86                 config_get dns "$config" dns
  87                 for dns in $dns; do
  88                         grep -q "$dns" /tmp/resolv.conf.auto 2>/dev/null || \
  89                                 echo "nameserver $dns" >> /tmp/resolv.conf.auto
  90                 done
  91         }
  92
  93         config_get demand "$cfg" demand
  94         [ -n "$demand" ] && echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto
  95
  96         config_get_bool ipv6 "$cfg" ipv6 0
  97         [ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""
  98
  99         /usr/sbin/pppd "$@" \
 100                 ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
 101                 ${demand:+precompiled-active-filter /etc/ppp/filter demand idle }${demand:-persist} \
 102                 $peerdns \
 103                 $defaultroute \
 104                 ${username:+user "$username" password "$password"} \
 105                 unit "$unit" \
 106                 linkname "$cfg" \
 107                 ipparam "$cfg" \
 108                 ${connect:+connect "$connect"} \
 109                 ${disconnect:+disconnect "$disconnect"} \
 110                 ${ipv6} \
 111                 ${pppd_options}
 112
 113         lock -u "/var/lock/ppp-${cfg}"
 114 }
 115
 116 setup_interface_ppp() {
 117         local iface="$1"
 118         local config="$2"
 119
 120         config_get device "$config" device
 121
 122         config_get mtu "$config" mtu
 123         mtu=${mtu:-1492}
 124         start_pppd "$config" \
 125                 mtu $mtu mru $mtu \
 126                 "$device"
 127 }
 128