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