package/firewall/files/lib/core.sh

   1 # Copyright (C) 2009-2010 OpenWrt.org
   2
   3 FW_LIBDIR=${FW_LIBDIR:-/lib/firewall}
   4
   5 . $FW_LIBDIR/fw.sh
   6 include /lib/network
   7
   8 fw_start() {
   9         fw_init
  10
  11         FW_DEFAULTS_APPLIED=
  12
  13         fw_is_loaded && {
  14                 echo "firewall already loaded" >&2
  15                 exit 1
  16         }
  17
  18         uci_set_state firewall core "" firewall_state
  19
  20         fw_clear DROP
  21
  22         fw_callback pre core
  23
  24         echo "Loading defaults"
  25         fw_config_once fw_load_defaults defaults
  26
  27         echo "Loading zones"
  28         config_foreach fw_load_zone zone
  29
  30         echo "Loading forwardings"
  31         config_foreach fw_load_forwarding forwarding
  32
  33         echo "Loading rules"
  34         config_foreach fw_load_rule rule
  35
  36         echo "Loading redirects"
  37         config_foreach fw_load_redirect redirect
  38
  39         echo "Loading includes"
  40         config_foreach fw_load_include include
  41
  42         [ -z "$FW_NOTRACK_DISABLED" ] && {
  43                 echo "Optimizing conntrack"
  44                 config_foreach fw_load_notrack_zone zone
  45         }
  46
  47         echo "Loading interfaces"
  48         config_foreach fw_configure_interface interface add
  49
  50         fw_callback post core
  51
  52         uci_set_state firewall core zones "$FW_ZONES"
  53         uci_set_state firewall core loaded 1
  54 }
  55
  56 fw_stop() {
  57         fw_init
  58
  59         fw_callback pre stop
  60
  61         local z n i
  62         config_get z core zones
  63         for z in $z; do
  64                 config_get n core "${z}_networks"
  65                 for n in $n; do
  66                         config_get i core "${n}_ifname"
  67                         [ -n "$i" ] && env -i ACTION=remove ZONE="$z" \
  68                                 INTERFACE="$n" DEVICE="$i" /sbin/hotplug-call firewall
  69                 done
  70
  71                 config_get i core "${z}_tcpmss"
  72                 [ "$i" == 1 ] && {
  73                         fw del i m FORWARD zone_${z}_MSSFIX
  74                         fw del i m zone_${z}_MSSFIX
  75                 }
  76         done
  77
  78         fw_clear ACCEPT
  79
  80         fw_callback post stop
  81
  82         uci_revert_state firewall
  83         config_clear
  84
  85         local h
  86         for h in $FW_HOOKS; do unset $h; done
  87
  88         unset FW_HOOKS
  89         unset FW_INITIALIZED
  90 }
  91
  92 fw_restart() {
  93         fw_stop
  94         fw_start
  95 }
  96
  97 fw_reload() {
  98         fw_restart
  99 }
 100
 101 fw_is_loaded() {
 102         local bool=$(uci_get_state firewall.core.loaded)
 103         return $((! ${bool:-0}))
 104 }
 105
 106
 107 fw_die() {
 108         echo "Error:" "$@" >&2
 109         fw_log error "$@"
 110         fw_stop
 111         exit 1
 112 }
 113
 114 fw_log() {
 115         local level="$1"
 116         [ -n "$2" ] && shift || level=notice
 117         [ "$level" != error ] || echo "Error: $@" >&2
 118         logger -t firewall -p user.$level "$@"
 119 }
 120
 121
 122 fw_init() {
 123         [ -z "$FW_INITIALIZED" ] || return 0
 124
 125         . $FW_LIBDIR/config.sh
 126
 127         scan_interfaces
 128         fw_config_append firewall
 129
 130         local hooks="core stop defaults zone notrack synflood"
 131         local file lib hk pp
 132         for file in $FW_LIBDIR/core_*.sh; do
 133                 . $file
 134                 hk=$(basename $file .sh)
 135                 hk=${hk#core_}
 136                 append hooks $hk
 137         done
 138         for file in $FW_LIBDIR/*.sh; do
 139                 lib=$(basename $file .sh)
 140                 lib=${lib##[0-9][0-9]_}
 141                 case $lib in
 142                         core*|fw|config|uci_firewall) continue ;;
 143                 esac
 144                 . $file
 145                 for hk in $hooks; do
 146                         for pp in pre post; do
 147                                 type ${lib}_${pp}_${hk}_cb >/dev/null && {
 148                                         append FW_CB_${pp}_${hk} ${lib}
 149                                         append FW_HOOKS FW_CB_${pp}_${hk}
 150                                 }
 151                         done
 152                 done
 153         done
 154
 155         fw_callback post init
 156
 157         FW_INITIALIZED=1
 158         return 0
 159 }