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