package/ppp/files/ppp.sh

   1 stop_interface_ppp() {
   2         local cfg="$1"
   3
   4         local proto
   5         config_get proto "$cfg" proto
   6
   7         local ifname
   8         config_get ifname "$cfg" ifname
   9
  10         local link="$proto-${ifname#$proto-}"
  11         [ -f "/var/run/ppp-${link}.pid" ] && {
  12                 local pid="$(head -n1 /var/run/ppp-${link}.pid 2>/dev/null)"
  13                 local try=0
  14                 grep -qs pppd "/proc/$pid/cmdline" && kill -TERM $pid && \
  15                         while grep -qs pppd "/proc/$pid/cmdline" && [ $((try++)) -lt 5 ]; do sleep 1; done
  16                 grep -qs pppd "/proc/$pid/cmdline" && kill -KILL $pid && \
  17                         while grep -qs pppd "/proc/$pid/cmdline"; do sleep 1; done
  18                 rm -f "/var/run/ppp-${link}.pid"
  19         }
  20
  21         local lock="/var/lock/ppp-$link"
  22         [ -f "$lock" ] && lock -u "$lock"
  23 }
  24
  25 start_pppd() {
  26         local cfg="$1"; shift
  27
  28         local proto
  29         config_get proto "$cfg" proto
  30
  31         # unique link identifier
  32         local link="${proto:-ppp}-$cfg"
  33
  34         # make sure only one pppd process is started
  35         lock "/var/lock/ppp-${link}"
  36         local pid="$(head -n1 /var/run/ppp-${link}.pid 2>/dev/null)"
  37         [ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
  38                 lock -u "/var/lock/ppp-${link}"
  39                 return 0
  40         }
  41
  42         # Workaround: sometimes hotplug2 doesn't deliver the hotplug event for creating
  43         # /dev/ppp fast enough to be used here
  44         [ -e /dev/ppp ] || mknod /dev/ppp c 108 0
  45
  46         local device
  47         config_get device "$cfg" device
  48
  49         local username
  50         config_get username "$cfg" username
  51
  52         local password
  53         config_get password "$cfg" password
  54
  55         local keepalive
  56         config_get keepalive "$cfg" keepalive
  57
  58         local connect
  59         config_get connect "$cfg" connect
  60
  61         local disconnect
  62         config_get disconnect "$cfg" disconnect
  63
  64         local pppd_options
  65         config_get pppd_options "$cfg" pppd_options
  66
  67         local defaultroute
  68         config_get_bool defaultroute "$cfg" defaultroute 1
  69         [ "$defaultroute" -eq 1 ] && \
  70                 defaultroute="defaultroute replacedefaultroute" || defaultroute="nodefaultroute"
  71
  72         local interval="${keepalive##*[, ]}"
  73         [ "$interval" != "$keepalive" ] || interval=5
  74
  75         local dns
  76         config_get dns "$config" dns
  77
  78         local has_dns=0
  79         local peer_default=1
  80         [ -n "$dns" ] && {
  81                 has_dns=1
  82                 peer_default=0
  83         }
  84
  85         local peerdns
  86         config_get_bool peerdns "$cfg" peerdns $peer_default
  87
  88         if [ "$peerdns" -eq 1 ] || [ ! -e /tmp/resolv.conf.auto ]; then
  89                 echo -n "" > /tmp/resolv.conf.auto
  90         fi
  91
  92         [ "$peerdns" -eq 1 ] && {
  93                 peerdns="usepeerdns"
  94         } || {
  95                 peerdns=""
  96                 for dns in $dns; do
  97                         echo "nameserver $dns" >> /tmp/resolv.conf.auto
  98                 done
  99         }
 100
 101         local demand
 102         config_get_bool demand "$cfg" demand 0
 103
 104         local demandargs
 105         [ "$demand" -eq 1 ] && {
 106                 demandargs="precompiled-active-filter /etc/ppp/filter demand idle"
 107                 [ "$has_dns" -eq 0 ] && \
 108                         echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto
 109         } || {
 110                 demandargs="persist"
 111         }
 112
 113         local ipv6
 114         config_get_bool ipv6 "$cfg" ipv6 0
 115         [ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""
 116
 117         start-stop-daemon -S -b -x /usr/sbin/pppd -m -p /var/run/ppp-$link.pid -- "$@" \
 118                 ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
 119                 $demandargs \
 120                 $peerdns \
 121                 $defaultroute \
 122                 ${username:+user "$username" password "$password"} \
 123                 ipparam "$cfg" \
 124                 ifname "$link" \
 125                 ${connect:+connect "$connect"} \
 126                 ${disconnect:+disconnect "$disconnect"} \
 127                 ${ipv6} \
 128                 ${pppd_options} \
 129                 nodetach
 130
 131         lock -u "/var/lock/ppp-${link}"
 132 }
 133
 134 setup_interface_ppp() {
 135         local iface="$1"
 136         local config="$2"
 137
 138         local device
 139         config_get device "$config" device
 140
 141         local mtu
 142         config_get mtu "$config" mtu
 143
 144         mtu=${mtu:-1492}
 145         start_pppd "$config" \
 146                 mtu $mtu mru $mtu \
 147                 "$device"
 148 }
 149