package/network/config/qos-scripts/files/usr/lib/qos/generate.sh

   1 #!/bin/sh
   2 [ -e /lib/functions.sh ] && . /lib/functions.sh || . ./functions.sh
   3 [ -x /sbin/modprobe ] && {
   4         insmod="modprobe"
   5         rmmod="$insmod -r"
   6 } || {
   7         insmod="insmod"
   8         rmmod="rmmod"
   9 }
  10
  11 add_insmod() {
  12         eval "export isset=\${insmod_$1}"
  13         case "$isset" in
  14                 1) ;;
  15                 *) {
  16                         [ "$2" ] && append INSMOD "$rmmod $1 >&- 2>&-" "$N"
  17                         append INSMOD "$insmod $* >&- 2>&-" "$N"; export insmod_$1=1
  18                 };;
  19         esac
  20 }
  21
  22 [ -e /etc/config/network ] && {
  23         # only try to parse network config on librecmc
  24
  25         find_ifname() {(
  26                 reset_cb
  27                 include /lib/network
  28                 scan_interfaces
  29                 config_get "$1" ifname
  30         )}
  31 } || {
  32         find_ifname() {
  33                 echo "Interface not found."
  34                 exit 1
  35         }
  36 }
  37
  38 parse_matching_rule() {
  39         local var="$1"
  40         local section="$2"
  41         local options="$3"
  42         local prefix="$4"
  43         local suffix="$5"
  44         local proto="$6"
  45         local mport=""
  46         local ports=""
  47
  48         append "$var" "$prefix" "$N"
  49         for option in $options; do
  50                 case "$option" in
  51                         proto) config_get value "$section" proto; proto="${proto:-$value}";;
  52                 esac
  53         done
  54         config_get type "$section" TYPE
  55         case "$type" in
  56                 classify) unset pkt; append "$var" "-m mark --mark 0/0x0f";;
  57                 default) pkt=1; append "$var" "-m mark --mark 0/0xf0";;
  58                 reclassify) pkt=1;;
  59         esac
  60         append "$var" "${proto:+-p $proto}"
  61         for option in $options; do
  62                 config_get value "$section" "$option"
  63
  64                 case "$pkt:$option" in
  65                         *:srchost)
  66                                 append "$var" "-s $value"
  67                         ;;
  68                         *:dsthost)
  69                                 append "$var" "-d $value"
  70                         ;;
  71                         *:ports|*:srcports|*:dstports)
  72                                 value="$(echo "$value" | sed -e 's,-,:,g')"
  73                                 lproto=${lproto:-tcp}
  74                                 case "$proto" in
  75                                         ""|tcp|udp) append "$var" "-m ${proto:-tcp -p tcp} -m multiport";;
  76                                         *) unset "$var"; return 0;;
  77                                 esac
  78                                 case "$option" in
  79                                         ports)
  80                                                 config_set "$section" srcports ""
  81                                                 config_set "$section" dstports ""
  82                                                 config_set "$section" portrange ""
  83                                                 append "$var" "--ports $value"
  84                                         ;;
  85                                         srcports)
  86                                                 config_set "$section" ports ""
  87                                                 config_set "$section" dstports ""
  88                                                 config_set "$section" portrange ""
  89                                                 append "$var" "--sports $value"
  90                                         ;;
  91                                         dstports)
  92                                                 config_set "$section" ports ""
  93                                                 config_set "$section" srcports ""
  94                                                 config_set "$section" portrange ""
  95                                                 append "$var" "--dports $value"
  96                                         ;;
  97                                 esac
  98                                 ports=1
  99                         ;;
 100                         *:portrange)
 101                                 config_set "$section" ports ""
 102                                 config_set "$section" srcports ""
 103                                 config_set "$section" dstports ""
 104                                 value="$(echo "$value" | sed -e 's,-,:,g')"
 105                                 case "$proto" in
 106                                         ""|tcp|udp) append "$var" "-m ${proto:-tcp -p tcp} --sport $value --dport $value";;
 107                                         *) unset "$var"; return 0;;
 108                                 esac
 109                                 ports=1
 110                         ;;
 111                         *:connbytes)
 112                                 value="$(echo "$value" | sed -e 's,-,:,g')"
 113                                 add_insmod xt_connbytes
 114                                 append "$var" "-m connbytes --connbytes $value --connbytes-dir both --connbytes-mode bytes"
 115                         ;;
 116                         *:comment)
 117                                 add_insmod xt_comment
 118                                 append "$var" "-m comment --comment '$value'"
 119                         ;;
 120                         *:tos)
 121                                 add_insmod xt_dscp
 122                                 case "$value" in
 123                                         !*) append "$var" "-m tos ! --tos $value";;
 124                                         *) append "$var" "-m tos --tos $value"
 125                                 esac
 126                         ;;
 127                         *:dscp)
 128                                 add_insmod xt_dscp
 129                                 dscp_option="--dscp"
 130                                 [ -z "${value%%[EBCA]*}" ] && dscp_option="--dscp-class"
 131                                 case "$value" in
 132                                         !*) append "$var" "-m dscp ! $dscp_option $value";;
 133                                         *) append "$var" "-m dscp $dscp_option $value"
 134                                 esac
 135                         ;;
 136                         *:direction)
 137                                 value="$(echo "$value" | sed -e 's,-,:,g')"
 138                                 if [ "$value" = "out" ]; then
 139                                         append "$var" "-o $device"
 140                                 elif [ "$value" = "in" ]; then
 141                                         append "$var" "-i $device"
 142                                 fi
 143                         ;;
 144                         *:srciface)
 145                                 append "$var" "-i $value"
 146                         ;;
 147                         1:pktsize)
 148                                 value="$(echo "$value" | sed -e 's,-,:,g')"
 149                                 add_insmod xt_length
 150                                 append "$var" "-m length --length $value"
 151                         ;;
 152                         1:limit)
 153                                 add_insmod xt_limit
 154                                 append "$var" "-m limit --limit $value"
 155                         ;;
 156                         1:tcpflags)
 157                                 case "$proto" in
 158                                         tcp) append "$var" "-m tcp --tcp-flags ALL $value";;
 159                                         *) unset $var; return 0;;
 160                                 esac
 161                         ;;
 162                         1:mark)
 163                                 config_get class "${value##!}" classnr
 164                                 [ -z "$class" ] && continue;
 165                                 case "$value" in
 166                                         !*) append "$var" "-m mark ! --mark $class/0x0f";;
 167                                         *) append "$var" "-m mark --mark $class/0x0f";;
 168                                 esac
 169                         ;;
 170                         1:TOS)
 171                                 add_insmod xt_DSCP
 172                                 config_get TOS "$rule" 'TOS'
 173                                 suffix="-j TOS --set-tos "${TOS:-"Normal-Service"}
 174                         ;;
 175                         1:DSCP)
 176                                 add_insmod xt_DSCP
 177                                 config_get DSCP "$rule" 'DSCP'
 178                                 [ -z "${DSCP%%[EBCA]*}" ] && set_value="--set-dscp-class $DSCP" \
 179                                 || set_value="--set-dscp $DSCP"
 180                                 suffix="-j DSCP $set_value"
 181                         ;;
 182                 esac
 183         done
 184         append "$var" "$suffix"
 185         case "$ports:$proto" in
 186                 1:)     parse_matching_rule "$var" "$section" "$options" "$prefix" "$suffix" "udp";;
 187         esac
 188 }
 189
 190 config_cb() {
 191         option_cb() {
 192                 return 0
 193         }
 194         case "$1" in
 195                 interface)
 196                         config_set "$2" "classgroup" "Default"
 197                         config_set "$2" "upload" "128"
 198                 ;;
 199                 classify|default|reclassify)
 200                         option_cb() {
 201                                 append "CONFIG_${CONFIG_SECTION}_options" "$1"
 202                         }
 203                 ;;
 204         esac
 205 }
 206
 207 qos_parse_config() {
 208         config_get TYPE "$1" TYPE
 209         case "$TYPE" in
 210                 interface)
 211                         config_get_bool enabled "$1" enabled 1
 212                         [ 1 -eq "$enabled" ] && {
 213                                 config_get classgroup "$1" classgroup
 214                                 config_set "$1" ifbdev "$C"
 215                                 C=$(($C+1))
 216                                 append INTERFACES "$1"
 217                                 config_set "$classgroup" enabled 1
 218                                 config_get device "$1" device
 219                                 [ -z "$device" ] && {
 220                                         device="$(find_ifname $1)"
 221                                         config_set "$1" device "$device"
 222                                 }
 223                         }
 224                 ;;
 225                 classgroup) append CG "$1";;
 226                 classify|default|reclassify)
 227                         case "$TYPE" in
 228                                 classify) var="ctrules";;
 229                                 *) var="rules";;
 230                         esac
 231                         append "$var" "$1"
 232                 ;;
 233         esac
 234 }
 235
 236 enum_classes() {
 237         local c="0"
 238         config_get classes "$1" classes
 239         config_get default "$1" default
 240         for class in $classes; do
 241                 c="$(($c + 1))"
 242                 config_set "${class}" classnr $c
 243                 case "$class" in
 244                         $default) class_default=$c;;
 245                 esac
 246         done
 247         class_default="${class_default:-$c}"
 248 }
 249
 250 cls_var() {
 251         local varname="$1"
 252         local class="$2"
 253         local name="$3"
 254         local type="$4"
 255         local default="$5"
 256         local tmp tmp1 tmp2
 257         config_get tmp1 "$class" "$name"
 258         config_get tmp2 "${class}_${type}" "$name"
 259         tmp="${tmp2:-$tmp1}"
 260         tmp="${tmp:-$tmp2}"
 261         export ${varname}="${tmp:-$default}"
 262 }
 263
 264 tcrules() {
 265         _dir=/usr/lib/qos
 266         [ -e $_dir/tcrules.awk ] || _dir=.
 267         echo "$cstr" | awk \
 268                 -v device="$dev" \
 269                 -v linespeed="$rate" \
 270                 -v direction="$dir" \
 271                 -f $_dir/tcrules.awk
 272 }
 273
 274 start_interface() {
 275         local iface="$1"
 276         local num_ifb="$2"
 277         config_get device "$iface" device
 278         config_get_bool enabled "$iface" enabled 1
 279         [ -z "$device" -o 1 -ne "$enabled" ] && {
 280                 return 1
 281         }
 282         config_get upload "$iface" upload
 283         config_get_bool halfduplex "$iface" halfduplex
 284         config_get download "$iface" download
 285         config_get classgroup "$iface" classgroup
 286         config_get_bool overhead "$iface" overhead 0
 287
 288         download="${download:-${halfduplex:+$upload}}"
 289         enum_classes "$classgroup"
 290         for dir in ${halfduplex:-up} ${download:+down}; do
 291                 case "$dir" in
 292                         up)
 293                                 [ "$overhead" = 1 ] && upload=$(($upload * 98 / 100 - (15 * 128 / $upload)))
 294                                 dev="$device"
 295                                 rate="$upload"
 296                                 dl_mode=""
 297                                 prefix="cls"
 298                         ;;
 299                         down)
 300                                 [ "$(ls -d /proc/sys/net/ipv4/conf/ifb* 2>&- | wc -l)" -ne "$num_ifb" ] && add_insmod ifb numifbs="$num_ifb"
 301                                 config_get ifbdev "$iface" ifbdev
 302                                 [ "$overhead" = 1 ] && download=$(($download * 98 / 100 - (80 * 1024 / $download)))
 303                                 dev="ifb$ifbdev"
 304                                 rate="$download"
 305                                 dl_mode=1
 306                                 prefix="d_cls"
 307                         ;;
 308                         *) continue;;
 309                 esac
 310                 cstr=
 311                 for class in $classes; do
 312                         cls_var pktsize "$class" packetsize $dir 1500
 313                         cls_var pktdelay "$class" packetdelay $dir 0
 314                         cls_var maxrate "$class" limitrate $dir 100
 315                         cls_var prio "$class" priority $dir 1
 316                         cls_var avgrate "$class" avgrate $dir 0
 317                         cls_var qdisc "$class" qdisc $dir ""
 318                         cls_var filter "$class" filter $dir ""
 319                         config_get classnr "$class" classnr
 320                         append cstr "$classnr:$prio:$avgrate:$pktsize:$pktdelay:$maxrate:$qdisc:$filter" "$N"
 321                 done
 322                 append ${prefix}q "$(tcrules)" "$N"
 323                 export dev_${dir}="ifconfig $dev up >&- 2>&-
 324 tc qdisc del dev $dev root >&- 2>&-
 325 tc qdisc add dev $dev root handle 1: hfsc default ${class_default}0
 326 tc class add dev $dev parent 1: classid 1:1 hfsc sc rate ${rate}kbit ul rate ${rate}kbit"
 327         done
 328         [ -n "$download" ] && {
 329                 add_insmod cls_u32
 330                 add_insmod em_u32
 331                 add_insmod act_connmark
 332                 add_insmod act_mirred
 333                 add_insmod sch_ingress
 334         }
 335         if [ -n "$halfduplex" ]; then
 336                 export dev_up="tc qdisc del dev $device root >&- 2>&-
 337 tc qdisc add dev $device root handle 1: hfsc
 338 tc filter add dev $device parent 1: prio 10 u32 match u32 0 0 flowid 1:1 action mirred egress redirect dev ifb$ifbdev"
 339         elif [ -n "$download" ]; then
 340                 append dev_${dir} "tc qdisc del dev $device ingress >&- 2>&-
 341 tc qdisc add dev $device ingress
 342 tc filter add dev $device parent ffff: prio 1 u32 match u32 0 0 flowid 1:1 action connmark action mirred egress redirect dev ifb$ifbdev" "$N"
 343         fi
 344         add_insmod cls_fw
 345         add_insmod sch_hfsc
 346
 347         cat <<EOF
 348 ${INSMOD:+$INSMOD$N}${dev_up:+$dev_up
 349 $clsq
 350 }${ifbdev:+$dev_down
 351 $d_clsq
 352 $d_clsl
 353 $d_clsf
 354 }
 355 EOF
 356         unset INSMOD clsq clsf clsl d_clsq d_clsl d_clsf dev_up dev_down
 357 }
 358
 359 start_interfaces() {
 360         local C="$1"
 361         for iface in $INTERFACES; do
 362                 start_interface "$iface" "$C"
 363         done
 364 }
 365
 366 add_rules() {
 367         local var="$1"
 368         local rules="$2"
 369         local prefix="$3"
 370
 371         for rule in $rules; do
 372                 unset iptrule
 373                 config_get target "$rule" target
 374                 config_get target "$target" classnr
 375                 config_get options "$rule" options
 376
 377                 ## If we want to override the TOS field, let's clear the DSCP field first.
 378                 [ ! -z "$(echo $options | grep 'TOS')" ] && {
 379                         s_options=${options%%TOS}
 380                         add_insmod xt_DSCP
 381                         parse_matching_rule iptrule "$rule" "$s_options" "$prefix" "-j DSCP --set-dscp 0"
 382                         append "$var" "$iptrule" "$N"
 383                         unset iptrule
 384                 }
 385
 386                 target=$(($target | ($target << 4)))
 387                 parse_matching_rule iptrule "$rule" "$options" "$prefix" "-j MARK --set-mark $target/0xff"
 388                 append "$var" "$iptrule" "$N"
 389         done
 390 }
 391
 392 start_cg() {
 393         local cg="$1"
 394         local iptrules
 395         local pktrules
 396         local sizerules
 397         enum_classes "$cg"
 398         for command in $iptables; do
 399                 add_rules iptrules "$ctrules" "$command -w -t mangle -A qos_${cg}_ct"
 400         done
 401         config_get classes "$cg" classes
 402         for class in $classes; do
 403                 config_get mark "$class" classnr
 404                 config_get maxsize "$class" maxsize
 405                 [ -z "$maxsize" -o -z "$mark" ] || {
 406                         add_insmod xt_length
 407                         for command in $iptables; do
 408                                 append pktrules "$command -w -t mangle -A qos_${cg} -m mark --mark $mark/0x0f -m length --length $maxsize: -j MARK --set-mark 0/0xff" "$N"
 409                         done
 410                 }
 411         done
 412         for command in $iptables; do
 413                 add_rules pktrules "$rules" "$command -w -t mangle -A qos_${cg}"
 414         done
 415         for iface in $INTERFACES; do
 416                 config_get classgroup "$iface" classgroup
 417                 config_get device "$iface" device
 418                 config_get ifbdev "$iface" ifbdev
 419                 config_get upload "$iface" upload
 420                 config_get download "$iface" download
 421                 config_get halfduplex "$iface" halfduplex
 422                 download="${download:-${halfduplex:+$upload}}"
 423                 for command in $iptables; do
 424                         append up "$command -w -t mangle -A OUTPUT -o $device -j qos_${cg}" "$N"
 425                         append up "$command -w -t mangle -A FORWARD -o $device -j qos_${cg}" "$N"
 426                 done
 427         done
 428         cat <<EOF
 429 $INSMOD
 430 EOF
 431
 432 for command in $iptables; do
 433         cat <<EOF
 434         $command -w -t mangle -N qos_${cg}
 435         $command -w -t mangle -N qos_${cg}_ct
 436 EOF
 437 done
 438 cat <<EOF
 439         ${iptrules:+${iptrules}${N}}
 440 EOF
 441 for command in $iptables; do
 442         cat <<EOF
 443         $command -w -t mangle -A qos_${cg}_ct -j CONNMARK --save-mark --mask 0xff
 444         $command -w -t mangle -A qos_${cg} -j CONNMARK --restore-mark --mask 0x0f
 445         $command -w -t mangle -A qos_${cg} -m mark --mark 0/0x0f -j qos_${cg}_ct
 446 EOF
 447 done
 448 cat <<EOF
 449 $pktrules
 450 EOF
 451 for command in $iptables; do
 452         cat <<EOF
 453         $command -w -t mangle -A qos_${cg} -j CONNMARK --save-mark --mask 0xff
 454 EOF
 455 done
 456 cat <<EOF
 457 $up$N${down:+${down}$N}
 458 EOF
 459         unset INSMOD
 460 }
 461
 462 start_firewall() {
 463         add_insmod xt_multiport
 464         add_insmod xt_connmark
 465         stop_firewall
 466         for group in $CG; do
 467                 start_cg $group
 468         done
 469 }
 470
 471 stop_firewall() {
 472         # Builds up a list of iptables commands to flush the qos_* chains,
 473         # remove rules referring to them, then delete them
 474
 475         # Print rules in the mangle table, like iptables-save
 476         for command in $iptables; do
 477                 $command -w -t mangle -S |
 478                         # Find rules for the qos_* chains
 479                         grep -E '(^-N qos_|-j qos_)' |
 480                         # Exclude rules in qos_* chains (inter-qos_* refs)
 481                         grep -v '^-A qos_' |
 482                         # Replace -N with -X and hold, with -F and print
 483                         # Replace -A with -D
 484                         # Print held lines at the end (note leading newline)
 485                         sed -e '/^-N/{s/^-N/-X/;H;s/^-X/-F/}' \
 486                                 -e 's/^-A/-D/' \
 487                                 -e '${p;g}' |
 488                         # Make into proper iptables calls
 489                         # Note: awkward in previous call due to hold space usage
 490                         sed -n -e "s/^./${command} -w -t mangle &/p"
 491         done
 492 }
 493
 494 C="0"
 495 INTERFACES=""
 496 [ -e ./qos.conf ] && {
 497         . ./qos.conf
 498         config_cb
 499 } || {
 500         config_load qos
 501         config_foreach qos_parse_config
 502 }
 503
 504 C="0"
 505 for iface in $INTERFACES; do
 506         export C="$(($C + 1))"
 507 done
 508
 509 [ -x /usr/sbin/ip6tables ] && {
 510         iptables="ip6tables iptables"
 511 } || {
 512         iptables="iptables"
 513 }
 514
 515 case "$1" in
 516         all)
 517                 start_interfaces "$C"
 518                 start_firewall
 519         ;;
 520         interface)
 521                 start_interface "$2" "$C"
 522         ;;
 523         interfaces)
 524                 start_interfaces
 525         ;;
 526         firewall)
 527                 case "$2" in
 528                         stop)
 529                                 stop_firewall
 530                         ;;
 531                         start|"")
 532                                 start_firewall
 533                         ;;
 534                 esac
 535         ;;
 536 esac