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