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