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