applications/luci-splash/root/etc/init.d/luci_splash

   1 #!/bin/sh /etc/rc.common
   2
   3 START=70
   4 EXTRA_COMMANDS=clear_leases
   5 LIMIT_DOWN=0
   6 LIMIT_DOWN_BURST=0
   7 LIMIT_UP=0
   8
   9 IPT_REPLAY=/var/run/luci_splash.iptlog
  10 LOCK=/var/run/luci_splash.lock
  11
  12 silent() {
  13         "$@" 2>/dev/null
  14 }
  15
  16 ipt_log() {
  17         iptables -I "$@"
  18         echo iptables -D "$@" >> $IPT_REPLAY
  19 }
  20
  21 iface_add() {
  22         local cfg="$1"
  23
  24         config_get zone "$cfg" zone
  25         [ -n "$zone" ] || return 0
  26
  27         config_get net "$cfg" network
  28         [ -n "$net" ] || return 0
  29
  30         config_get ifname "$net" ifname
  31         [ -n "$ifname" ] || return 0
  32
  33         config_get ipaddr "$net" ipaddr
  34         [ -n "$ipaddr" ] || return 0
  35
  36         config_get netmask "$net" netmask
  37         [ -n "$netmask" ] || return 0
  38
  39         config_get parentiface "$net" interface
  40         [ -n "$parentiface" ] && {
  41                 config_get parentproto   "$parentiface" proto
  42                 config_get parentipaddr  "$parentiface" ipaddr
  43                 config_get parentnetmask "$parentiface" netmask
  44         }
  45
  46         eval "$(ipcalc.sh $ipaddr $netmask)"
  47
  48         ### Add interface specific chain entry rules
  49         ipt_log "zone_${zone}_prerouting" -i "${ifname%:*}" -s "$NETWORK/$PREFIX" -j luci_splash_prerouting -t nat
  50         ipt_log "zone_${zone}_forward"    -i "${ifname%:*}" -s "$NETWORK/$PREFIX" -j luci_splash_forwarding -t filter
  51
  52         ### Allow traffic to the same subnet
  53         iptables -t nat    -I luci_splash_prerouting -d "$ipaddr/${netmask:-32}" -j RETURN
  54         iptables -t filter -I luci_splash_forwarding -d "$ipaddr/${netmask:-32}" -j RETURN
  55
  56         ### Allow traffic to the mesh subnet
  57         [ "$parentproto" = "static" -a -n "$parentipaddr" ] && {
  58                 iptables -t nat    -I luci_splash_prerouting -d "$parentipaddr/${parentnetmask:-32}" -j RETURN
  59                 iptables -t filter -I luci_splash_forwarding -d "$parentipaddr/${parentnetmask:-32}" -j RETURN
  60         }
  61
  62         qos_iface_add "$ifname"
  63 }
  64
  65 iface_del() {
  66         config_get zone "$1" zone
  67         [ -n "$zone" ] || return 0
  68
  69         config_get net "$1" network
  70         [ -n "$net" ] || return 0
  71
  72         config_get ifname "$net" ifname
  73         [ -n "$ifname" ] || return 0
  74
  75         # Clear interface specific rules
  76         [ -s $IPT_REPLAY ] && {
  77                 grep -- "-i ${ifname%:*}" $IPT_REPLAY | while read ln; do silent $ln; done
  78                 sed -ie "/-i ${ifname%:*}/d" $IPT_REPLAY
  79         }
  80
  81         qos_iface_del "$ifname"
  82 }
  83
  84 mac_add() {
  85         config_get mac "$1" mac
  86         append MACS "$mac"
  87 }
  88
  89 subnet_add() {
  90         local cfg="$1"
  91
  92         config_get ipaddr  "$cfg" ipaddr
  93         config_get netmask "$cfg" netmask
  94
  95         [ -n "$ipaddr" ] && {
  96                 iptables -t nat    -I luci_splash_prerouting -d "$ipaddr/${netmask:-32}" -j RETURN
  97                 iptables -t filter -I luci_splash_forwarding -d "$ipaddr/${netmask:-32}" -j RETURN
  98         }
  99 }
 100
 101 qos_iface_add() {
 102         local iface="$1"
 103
 104         # 77 -> download root qdisc
 105         # 78 -> upload root qdisc
 106         # 79 -> fwmark: client->inet
 107         # 80 -> fwmark: inet->client
 108
 109         silent tc qdisc del dev "$iface" root handle 77:
 110
 111         if [ "$LIMIT_UP" -gt 0 -a "$LIMIT_DOWN" -gt 0 ]; then
 112                 tc qdisc add dev "$iface" root handle 77: htb
 113
 114                 # assume maximum rate of 20.000 kilobit for wlan
 115                 tc class add dev "$iface" parent 77: classid 77:1 htb rate 20000kbit
 116
 117                 # set download limit and burst
 118                 tc class add dev "$iface" parent 77:1 classid 77:10 htb \
 119                         rate ${LIMIT_DOWN}kbit ceil ${LIMIT_DOWN_BURST}kbit prio 2
 120
 121                 tc qdisc add dev "$iface" parent 77:10 handle 78: sfq perturb 10
 122
 123                 # adding ingress can result in "File exists" if qos-scripts are active
 124                 silent tc qdisc add dev "$iface" ingress
 125
 126                 # set client download speed
 127                 tc filter add dev "$iface" parent 77: protocol ip prio 2 \
 128                         handle 80 fw flowid 77:10
 129
 130                 # set client upload speed
 131                 tc filter add dev "$iface" parent ffff: protocol ip prio 1 \
 132                         handle 79 fw police rate ${LIMIT_UP}kbit mtu 6k burst 6k drop
 133         fi
 134 }
 135
 136 qos_iface_del() {
 137         local iface="$1"
 138
 139         silent tc qdisc del dev "$iface" root handle 77:
 140         silent tc qdisc del dev "$iface" root handle 78:
 141         silent tc filter del dev "$iface" parent ffff: protocol ip prio 1 handle 79 fw
 142 }
 143
 144 boot() {
 145         ### Setup splash-relay
 146         uci get uhttpd.splash 2>/dev/null || {
 147 uci batch <<EOF
 148         set uhttpd.splash=uhttpd
 149         set uhttpd.splash.home="/www/cgi-bin/splash/"
 150         set uhttpd.splash.interpreter=".sh=/bin/ash"
 151         set uhttpd.splash.listen_http="8082"
 152         set uhttpd.splash.index_page="splash.sh"
 153         set uhttpd.splash.error_page="/splash.sh"
 154
 155         commit uhttpd
 156 EOF
 157         }
 158
 159         ### We are started by the firewall include
 160         exit 0
 161 }
 162
 163 start() {
 164         lock $LOCK
 165
 166         include /lib/network
 167         scan_interfaces
 168         config_load luci_splash
 169
 170         ### Find QoS limits
 171         config_get LIMIT_UP general limit_up
 172         config_get LIMIT_DOWN general limit_down
 173         config_get LIMIT_DOWN_BURST general limit_down_burst
 174
 175         LIMIT_UP="$((8*${LIMIT_UP:-0}))"
 176         LIMIT_DOWN="$((8*${LIMIT_DOWN:-0}))"
 177         LIMIT_DOWN_BURST="${LIMIT_DOWN_BURST:+$((8*$LIMIT_DOWN_BURST))}"
 178         LIMIT_DOWN_BURST="${LIMIT_DOWN_BURST:-$(($LIMIT_DOWN / 5 * 6))}"
 179
 180         ### Load required modules
 181         [ "$LIMIT_UP" -gt 0 -a "$LIMIT_DOWN" -gt 0 ] && {
 182                 silent insmod act_police
 183                 silent insmod cls_fw
 184                 silent insmod cls_u32
 185                 silent insmod sch_htb
 186                 silent insmod sch_sfq
 187                 silent insmod sch_ingress
 188         }
 189
 190         ### Create subchains
 191         iptables -t nat    -N luci_splash_prerouting
 192         iptables -t nat    -N luci_splash_leases
 193         iptables -t filter -N luci_splash_forwarding
 194         iptables -t filter -N luci_splash_filter
 195
 196         ### Clear iptables replay log
 197         [ -s $IPT_REPLAY ] && . $IPT_REPLAY
 198         echo -n > $IPT_REPLAY
 199
 200         ### Build the main and portal rule
 201         config_foreach iface_add iface
 202         config_foreach subnet_add subnet
 203
 204         ### Add interface independant prerouting rules
 205         iptables -t nat -A luci_splash_prerouting -j luci_splash_leases
 206         iptables -t nat -A luci_splash_leases -p udp --dport 53 -j REDIRECT --to-ports 53
 207         iptables -t nat -A luci_splash_leases -p tcp --dport 80 -j REDIRECT --to-ports 8082
 208
 209         ### Add interface independant forwarding rules
 210         iptables -t filter -A luci_splash_forwarding -j luci_splash_filter
 211         iptables -t filter -A luci_splash_filter -p tcp -j REJECT --reject-with tcp-reset
 212         iptables -t filter -A luci_splash_filter -j REJECT --reject-with icmp-net-prohibited
 213
 214         ### Add QoS chain
 215         [ "$LIMIT_UP" -gt 0 -a "$LIMIT_DOWN" -gt 0 ] && {
 216                 iptables -t mangle -N luci_splash_mark_out
 217                 iptables -t mangle -N luci_splash_mark_in
 218                 iptables -t mangle -I PREROUTING  -j luci_splash_mark_out
 219                 iptables -t mangle -I POSTROUTING -j luci_splash_mark_in
 220         }
 221
 222         ### Find active mac addresses
 223         MACS=""
 224         config_foreach mac_add lease
 225         config_foreach mac_add blacklist
 226         config_foreach mac_add whitelist
 227
 228         ### Add crontab entry
 229         test -f /etc/crontabs/root || touch /etc/crontabs/root
 230         grep -q luci-splash /etc/crontabs/root || {
 231                 echo '*/5 * * * *       /usr/sbin/luci-splash sync' >> /etc/crontabs/root
 232         }
 233
 234         lock -u $LOCK
 235
 236         ### Populate iptables
 237         [ -n "$MACS" ] && luci-splash add-rules $MACS
 238 }
 239
 240 stop() {
 241         lock $LOCK
 242
 243         include /lib/network
 244         scan_interfaces
 245         config_load luci_splash
 246
 247         ### Clear interface rules
 248         config_foreach iface_del iface
 249
 250         silent iptables -t mangle -D PREROUTING  -j luci_splash_mark_out
 251         silent iptables -t mangle -D POSTROUTING -j luci_splash_mark_in
 252
 253         ### Clear subchains
 254         silent iptables -t nat    -F luci_splash_prerouting
 255         silent iptables -t nat    -F luci_splash_leases
 256         silent iptables -t filter -F luci_splash_forwarding
 257         silent iptables -t filter -F luci_splash_filter
 258         silent iptables -t mangle -F luci_splash_mark_out
 259         silent iptables -t mangle -F luci_splash_mark_in
 260
 261         ### Delete subchains
 262         silent iptables -t nat    -X luci_splash_prerouting
 263         silent iptables -t nat    -X luci_splash_leases
 264         silent iptables -t filter -X luci_splash_forwarding
 265         silent iptables -t filter -X luci_splash_filter
 266         silent iptables -t mangle -X luci_splash_mark_out
 267         silent iptables -t mangle -X luci_splash_mark_in
 268
 269         sed -ie '/\/usr\/sbin\/luci-splash sync/d' /var/spool/cron/crontabs/root
 270
 271         lock -u $LOCK
 272 }
 273
 274 clear_leases() {
 275         ### Find active mac addresses
 276         MACS=""
 277         config_foreach mac_add lease
 278
 279         ### Clear leases
 280         [ -n "$MACS" ] && luci-splash remove $MACS
 281 }
 282