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 "$cfg" ifname
   9
  10         [ -f "/var/run/ppp-${ifname}.pid" ] && {
  11                 local pid="$(head -n1 /var/run/ppp-${ifname}.pid 2>/dev/null)"
  12                 grep -qs pppd "/proc/$pid/cmdline" && kill -TERM $pid && \
  13                         while grep -qs pppd "/proc/$pid/cmdline"; do sleep 1; done
  14                 rm -f "/var/run/ppp-${ifname}.pid"
  15         }
  16
  17         local lock="/var/lock/ppp-$ifname"
  18         [ -f "$lock" ] && lock -u "$lock"
  19 }
  20
  21 start_pppd() {
  22         local cfg="$1"; shift
  23
  24         local proto
  25         config_get proto "$cfg" proto
  26
  27         # unique link identifier
  28         local link="${proto:-ppp}-$cfg"
  29
  30         # make sure only one pppd process is started
  31         lock "/var/lock/ppp-${link}"
  32         local pid="$(head -n1 /var/run/ppp-${link}.pid 2>/dev/null)"
  33         [ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
  34                 lock -u "/var/lock/ppp-${link}"
  35                 return 0
  36         }
  37
  38         # Workaround: sometimes hotplug2 doesn't deliver the hotplug event for creating
  39         # /dev/ppp fast enough to be used here
  40         [ -e /dev/ppp ] || mknod /dev/ppp c 108 0
  41
  42         local device
  43         config_get device "$cfg" device
  44
  45         local username
  46         config_get username "$cfg" username
  47
  48         local password
  49         config_get password "$cfg" password
  50
  51         local keepalive
  52         config_get keepalive "$cfg" keepalive
  53
  54         local connect
  55         config_get connect "$cfg" connect
  56
  57         local disconnect
  58         config_get disconnect "$cfg" disconnect
  59
  60         local pppd_options
  61         config_get pppd_options "$cfg" pppd_options
  62
  63         local defaultroute
  64         config_get_bool defaultroute "$cfg" defaultroute 1
  65         [ "$defaultroute" -eq 1 ] && \
  66                 defaultroute="defaultroute replacedefaultroute" || defaultroute="nodefaultroute"
  67
  68         local interval="${keepalive##*[, ]}"
  69         [ "$interval" != "$keepalive" ] || interval=5
  70
  71         local dns
  72         config_get dns "$config" dns
  73
  74         local has_dns=0
  75         local peer_default=1
  76         [ -n "$dns" ] && {
  77                 has_dns=1
  78                 peer_default=0
  79         }
  80
  81         local peerdns
  82         config_get_bool peerdns "$cfg" peerdns $peer_default
  83
  84         if [ "$peerdns" -eq 1 ] || [ ! -e /tmp/resolv.conf.auto ]; then
  85                 echo -n "" > /tmp/resolv.conf.auto
  86         fi
  87
  88         [ "$peerdns" -eq 1 ] && {
  89                 peerdns="usepeerdns"
  90         } || {
  91                 peerdns=""
  92                 for dns in $dns; do
  93                         echo "nameserver $dns" >> /tmp/resolv.conf.auto
  94                 done
  95         }
  96
  97         local demand
  98         config_get_bool demand "$cfg" demand 0
  99
 100         local demandargs
 101         [ "$demand" -eq 1 ] && {
 102                 demandargs="precompiled-active-filter /etc/ppp/filter demand idle"
 103                 [ "$has_dns" -eq 0 ] && \
 104                         echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto
 105         } || {
 106                 demandargs="persist"
 107         }
 108
 109         local ipv6
 110         config_get_bool ipv6 "$cfg" ipv6 0
 111         [ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""
 112
 113         /usr/sbin/pppd "$@" \
 114                 ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
 115                 $demandargs \
 116                 $peerdns \
 117                 $defaultroute \
 118                 ${username:+user "$username" password "$password"} \
 119                 linkname "$link" \
 120                 ipparam "$cfg" \
 121                 ifname "$link" \
 122                 ${connect:+connect "$connect"} \
 123                 ${disconnect:+disconnect "$disconnect"} \
 124                 ${ipv6} \
 125                 ${pppd_options}
 126
 127         lock -u "/var/lock/ppp-${link}"
 128 }
 129
 130 setup_interface_ppp() {
 131         local iface="$1"
 132         local config="$2"
 133
 134         local device
 135         config_get device "$config" device
 136
 137         local mtu
 138         config_get mtu "$config" mtu
 139
 140         mtu=${mtu:-1492}
 141         start_pppd "$config" \
 142                 mtu $mtu mru $mtu \
 143                 "$device"
 144 }
 145