target/linux/generic-2.6/patches-2.6.25/150-netfilter_imq.patch

   1 diff -Naurw 2.6.24/drivers/net/imq.c 2.6.24.imq/drivers/net/imq.c
   2 --- 2.6.24/drivers/net/imq.c    1969-12-31 21:00:00.000000000 -0300
   3 +++ 2.6.24.imq/drivers/net/imq.c        2008-01-26 14:52:43.000000000 -0300
   4 @@ -0,0 +1,409 @@
   5 +/*
   6 + *             Pseudo-driver for the intermediate queue device.
   7 + *
   8 + *             This program is free software; you can redistribute it and/or
   9 + *             modify it under the terms of the GNU General Public License
  10 + *             as published by the Free Software Foundation; either version
  11 + *             2 of the License, or (at your option) any later version.
  12 + *
  13 + * Authors:    Patrick McHardy, <kaber@trash.net>
  14 + *
  15 + *            The first version was written by Martin Devera, <devik@cdi.cz>
  16 + *
  17 + * Credits:    Jan Rafaj <imq2t@cedric.vabo.cz>
  18 + *              - Update patch to 2.4.21
  19 + *             Sebastian Strollo <sstrollo@nortelnetworks.com>
  20 + *              - Fix "Dead-loop on netdevice imq"-issue
  21 + *             Marcel Sebek <sebek64@post.cz>
  22 + *              - Update to 2.6.2-rc1
  23 + *
  24 + *            After some time of inactivity there is a group taking care
  25 + *            of IMQ again: http://www.linuximq.net
  26 + *
  27 + *
  28 + *            2004/06/30 - New version of IMQ patch to kernels <=2.6.7 including
  29 + *            the following changes:
  30 + *
  31 + *            - Correction of ipv6 support "+"s issue (Hasso Tepper)
  32 + *            - Correction of imq_init_devs() issue that resulted in
  33 + *            kernel OOPS unloading IMQ as module (Norbert Buchmuller)
  34 + *            - Addition of functionality to choose number of IMQ devices
  35 + *            during kernel config (Andre Correa)
  36 + *            - Addition of functionality to choose how IMQ hooks on
  37 + *            PRE and POSTROUTING (after or before NAT) (Andre Correa)
  38 + *            - Cosmetic corrections (Norbert Buchmuller) (Andre Correa)
  39 + *
  40 + *
  41 + *             2005/12/16 - IMQ versions between 2.6.7 and 2.6.13 were
  42 + *             released with almost no problems. 2.6.14-x was released
  43 + *             with some important changes: nfcache was removed; After
  44 + *             some weeks of trouble we figured out that some IMQ fields
  45 + *             in skb were missing in skbuff.c - skb_clone and copy_skb_header.
  46 + *             These functions are correctly patched by this new patch version.
  47 + *
  48 + *             Thanks for all who helped to figure out all the problems with
  49 + *             2.6.14.x: Patrick McHardy, Rune Kock, VeNoMouS, Max CtRiX,
  50 + *             Kevin Shanahan, Richard Lucassen, Valery Dachev (hopefully
  51 + *             I didn't forget anybody). I apologize again for my lack of time.
  52 + *
  53 + *             More info at: http://www.linuximq.net/ (Andre Correa)
  54 + */
  55 +
  56 +#include <linux/module.h>
  57 +#include <linux/kernel.h>
  58 +#include <linux/moduleparam.h>
  59 +#include <linux/skbuff.h>
  60 +#include <linux/netdevice.h>
  61 +#include <linux/rtnetlink.h>
  62 +#include <linux/if_arp.h>
  63 +#include <linux/netfilter.h>
  64 +#include <linux/netfilter_ipv4.h>
  65 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
  66 +       #include <linux/netfilter_ipv6.h>
  67 +#endif
  68 +#include <linux/imq.h>
  69 +#include <net/pkt_sched.h>
  70 +
  71 +extern int qdisc_restart1(struct net_device *dev);
  72 +
  73 +static nf_hookfn imq_nf_hook;
  74 +
  75 +static struct nf_hook_ops imq_ingress_ipv4 = {
  76 +       .hook           = imq_nf_hook,
  77 +       .owner          = THIS_MODULE,
  78 +       .pf             = PF_INET,
  79 +       .hooknum        = NF_IP_PRE_ROUTING,
  80 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
  81 +       .priority       = NF_IP_PRI_MANGLE + 1
  82 +#else
  83 +       .priority       = NF_IP_PRI_NAT_DST + 1
  84 +#endif
  85 +};
  86 +
  87 +static struct nf_hook_ops imq_egress_ipv4 = {
  88 +       .hook           = imq_nf_hook,
  89 +       .owner          = THIS_MODULE,
  90 +       .pf             = PF_INET,
  91 +       .hooknum        = NF_IP_POST_ROUTING,
  92 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
  93 +       .priority       = NF_IP_PRI_LAST
  94 +#else
  95 +       .priority       = NF_IP_PRI_NAT_SRC - 1
  96 +#endif
  97 +};
  98 +
  99 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 100 +static struct nf_hook_ops imq_ingress_ipv6 = {
 101 +       .hook           = imq_nf_hook,
 102 +       .owner          = THIS_MODULE,
 103 +       .pf             = PF_INET6,
 104 +       .hooknum        = NF_IP6_PRE_ROUTING,
 105 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
 106 +       .priority       = NF_IP6_PRI_MANGLE + 1
 107 +#else
 108 +       .priority       = NF_IP6_PRI_NAT_DST + 1
 109 +#endif
 110 +};
 111 +
 112 +static struct nf_hook_ops imq_egress_ipv6 = {
 113 +       .hook           = imq_nf_hook,
 114 +       .owner          = THIS_MODULE,
 115 +       .pf             = PF_INET6,
 116 +       .hooknum        = NF_IP6_POST_ROUTING,
 117 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
 118 +       .priority       = NF_IP6_PRI_LAST
 119 +#else
 120 +       .priority       = NF_IP6_PRI_NAT_SRC - 1
 121 +#endif
 122 +};
 123 +#endif
 124 +
 125 +#if defined(CONFIG_IMQ_NUM_DEVS)
 126 +static unsigned int numdevs = CONFIG_IMQ_NUM_DEVS;
 127 +#else
 128 +static unsigned int numdevs = 16;
 129 +#endif
 130 +
 131 +static struct net_device *imq_devs;
 132 +
 133 +static struct net_device_stats *imq_get_stats(struct net_device *dev)
 134 +{
 135 +       return (struct net_device_stats *)dev->priv;
 136 +}
 137 +
 138 +/* called for packets kfree'd in qdiscs at places other than enqueue */
 139 +static void imq_skb_destructor(struct sk_buff *skb)
 140 +{
 141 +       struct nf_info *info = skb->nf_info;
 142 +
 143 +       if (info) {
 144 +               if (info->indev)
 145 +                       dev_put(info->indev);
 146 +               if (info->outdev)
 147 +                       dev_put(info->outdev);
 148 +               kfree(info);
 149 +       }
 150 +}
 151 +
 152 +static int imq_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 153 +{
 154 +       struct net_device_stats *stats = (struct net_device_stats*) dev->priv;
 155 +
 156 +       stats->tx_bytes += skb->len;
 157 +       stats->tx_packets++;
 158 +
 159 +       skb->imq_flags = 0;
 160 +       skb->destructor = NULL;
 161 +
 162 +       dev->trans_start = jiffies;
 163 +       nf_reinject(skb, skb->nf_info, NF_ACCEPT);
 164 +       return 0;
 165 +}
 166 +
 167 +static int imq_nf_queue(struct sk_buff *skb, struct nf_info *info, unsigned queue_num, void *data)
 168 +{
 169 +       struct net_device *dev;
 170 +       struct net_device_stats *stats;
 171 +       struct sk_buff *skb2 = NULL;
 172 +       struct Qdisc *q;
 173 +       unsigned int index = skb->imq_flags&IMQ_F_IFMASK;
 174 +       int ret = -1;
 175 +
 176 +       if (index > numdevs)
 177 +               return -1;
 178 +
 179 +       dev = imq_devs + index;
 180 +       if (!(dev->flags & IFF_UP)) {
 181 +               skb->imq_flags = 0;
 182 +               nf_reinject(skb, info, NF_ACCEPT);
 183 +               return 0;
 184 +       }
 185 +       dev->last_rx = jiffies;
 186 +
 187 +       if (skb->destructor) {
 188 +               skb2 = skb;
 189 +               skb = skb_clone(skb, GFP_ATOMIC);
 190 +               if (!skb)
 191 +                       return -1;
 192 +       }
 193 +       skb->nf_info = info;
 194 +
 195 +       stats = (struct net_device_stats *)dev->priv;
 196 +       stats->rx_bytes+= skb->len;
 197 +       stats->rx_packets++;
 198 +
 199 +       spin_lock_bh(&dev->queue_lock);
 200 +       q = dev->qdisc;
 201 +       if (q->enqueue) {
 202 +               q->enqueue(skb_get(skb), q);
 203 +               if (skb_shared(skb)) {
 204 +                       skb->destructor = imq_skb_destructor;
 205 +                       kfree_skb(skb);
 206 +                       ret = 0;
 207 +               }
 208 +       }
 209 +       if (spin_is_locked(&dev->_xmit_lock))
 210 +               netif_schedule(dev);
 211 +       else
 212 +               while (!netif_queue_stopped(dev) && qdisc_restart1(dev) < 0)
 213 +                       /* NOTHING */;
 214 +
 215 +       spin_unlock_bh(&dev->queue_lock);
 216 +
 217 +       if (skb2)
 218 +               kfree_skb(ret ? skb : skb2);
 219 +
 220 +       return ret;
 221 +}
 222 +
 223 +static struct nf_queue_handler nfqh = {
 224 +       .name  = "imq",
 225 +       .outfn = imq_nf_queue,
 226 +};
 227 +
 228 +static unsigned int imq_nf_hook(unsigned int hook, struct sk_buff *pskb,
 229 +                               const struct net_device *indev,
 230 +                               const struct net_device *outdev,
 231 +                               int (*okfn)(struct sk_buff *))
 232 +{
 233 +       if (pskb->imq_flags & IMQ_F_ENQUEUE)
 234 +               return NF_QUEUE;
 235 +
 236 +       return NF_ACCEPT;
 237 +}
 238 +
 239 +
 240 +static int __init imq_init_hooks(void)
 241 +{
 242 +       int err;
 243 +
 244 +       err = nf_register_queue_handler(PF_INET, &nfqh);
 245 +       if (err > 0)
 246 +               goto err1;
 247 +       if ((err = nf_register_hook(&imq_ingress_ipv4)))
 248 +               goto err2;
 249 +       if ((err = nf_register_hook(&imq_egress_ipv4)))
 250 +               goto err3;
 251 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 252 +       if ((err = nf_register_queue_handler(PF_INET6, &nfqh)))
 253 +               goto err4;
 254 +       if ((err = nf_register_hook(&imq_ingress_ipv6)))
 255 +               goto err5;
 256 +       if ((err = nf_register_hook(&imq_egress_ipv6)))
 257 +               goto err6;
 258 +#endif
 259 +
 260 +       return 0;
 261 +
 262 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 263 +err6:
 264 +       nf_unregister_hook(&imq_ingress_ipv6);
 265 +err5:
 266 +       nf_unregister_queue_handler(PF_INET6, &nfqh);
 267 +err4:
 268 +       nf_unregister_hook(&imq_egress_ipv4);
 269 +#endif
 270 +err3:
 271 +       nf_unregister_hook(&imq_ingress_ipv4);
 272 +err2:
 273 +       nf_unregister_queue_handler(PF_INET, &nfqh);
 274 +err1:
 275 +       return err;
 276 +}
 277 +
 278 +static void __exit imq_unhook(void)
 279 +{
 280 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 281 +       nf_unregister_hook(&imq_ingress_ipv6);
 282 +       nf_unregister_hook(&imq_egress_ipv6);
 283 +       nf_unregister_queue_handler(PF_INET6, &nfqh);
 284 +#endif
 285 +       nf_unregister_hook(&imq_ingress_ipv4);
 286 +       nf_unregister_hook(&imq_egress_ipv4);
 287 +       nf_unregister_queue_handler(PF_INET, &nfqh);
 288 +}
 289 +
 290 +static int __init imq_dev_init(struct net_device *dev)
 291 +{
 292 +       dev->hard_start_xmit    = imq_dev_xmit;
 293 +       dev->type               = ARPHRD_VOID;
 294 +       dev->mtu                = 16000;
 295 +       dev->tx_queue_len       = 11000;
 296 +       dev->flags              = IFF_NOARP;
 297 +       dev->priv = kzalloc(sizeof(struct net_device_stats), GFP_KERNEL);
 298 +       if (dev->priv == NULL)
 299 +               return -ENOMEM;
 300 +       dev->get_stats          = imq_get_stats;
 301 +
 302 +       return 0;
 303 +}
 304 +
 305 +static void imq_dev_uninit(struct net_device *dev)
 306 +{
 307 +       kfree(dev->priv);
 308 +}
 309 +
 310 +static int __init imq_init_devs(struct net *net)
 311 +{
 312 +       struct net_device *dev;
 313 +       int i,j;
 314 +       j = numdevs;
 315 +
 316 +       if (!numdevs || numdevs > IMQ_MAX_DEVS) {
 317 +               printk(KERN_ERR "IMQ: numdevs has to be betweed 1 and %u\n",
 318 +                      IMQ_MAX_DEVS);
 319 +               return -EINVAL;
 320 +       }
 321 +
 322 +       imq_devs = kzalloc(sizeof(struct net_device) * numdevs, GFP_KERNEL);
 323 +       if (!imq_devs)
 324 +               return -ENOMEM;
 325 +
 326 +       /* we start counting at zero */
 327 +       numdevs--;
 328 +
 329 +       for (i = 0, dev = imq_devs; i <= numdevs; i++, dev++) {
 330 +               strcpy(dev->name, "imq%d");
 331 +               dev->init   = imq_dev_init;
 332 +               dev->uninit = imq_dev_uninit;
 333 +               dev->nd_net = net;
 334 +
 335 +               if (register_netdev(dev) < 0)
 336 +                       goto err_register;
 337 +       }
 338 +       printk(KERN_INFO "IMQ starting with %u devices...\n", j);
 339 +       return 0;
 340 +
 341 +err_register:
 342 +       for (; i; i--)
 343 +               unregister_netdev(--dev);
 344 +       kfree(imq_devs);
 345 +       return -EIO;
 346 +}
 347 +
 348 +static void imq_cleanup_devs(void)
 349 +{
 350 +       int i;
 351 +       struct net_device *dev = imq_devs;
 352 +
 353 +       for (i = 0; i <= numdevs; i++)
 354 +               unregister_netdev(dev++);
 355 +
 356 +       kfree(imq_devs);
 357 +}
 358 +
 359 +static __net_init int imq_init_module(struct net *net)
 360 +{
 361 +       int err;
 362 +
 363 +       if ((err = imq_init_devs(net))) {
 364 +               printk(KERN_ERR "IMQ: Error trying imq_init_devs(net)\n");
 365 +               return err;
 366 +       }
 367 +       if ((err = imq_init_hooks())) {
 368 +               printk(KERN_ERR "IMQ: Error trying imq_init_hooks()\n");
 369 +               imq_cleanup_devs();
 370 +               return err;
 371 +       }
 372 +
 373 +       printk(KERN_INFO "IMQ driver loaded successfully.\n");
 374 +
 375 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
 376 +       printk(KERN_INFO "\tHooking IMQ before NAT on PREROUTING.\n");
 377 +#else
 378 +       printk(KERN_INFO "\tHooking IMQ after NAT on PREROUTING.\n");
 379 +#endif
 380 +#if defined(CONFIG_IMQ_BEHAVIOR_AB) || defined(CONFIG_IMQ_BEHAVIOR_BB)
 381 +       printk(KERN_INFO "\tHooking IMQ before NAT on POSTROUTING.\n");
 382 +#else
 383 +       printk(KERN_INFO "\tHooking IMQ after NAT on POSTROUTING.\n");
 384 +#endif
 385 +
 386 +       return 0;
 387 +}
 388 +
 389 +static __net_exit void imq_exit_module(struct net *net)
 390 +{
 391 +       imq_unhook();
 392 +       imq_cleanup_devs();
 393 +       printk(KERN_INFO "IMQ driver unloaded successfully.\n");
 394 +}
 395 +
 396 +static struct pernet_operations __net_initdata imq_net_ops = {
 397 +    .init = imq_init_module,
 398 +    .exit = imq_exit_module,
 399 +};
 400 +
 401 +static int __init imq_init(void)
 402 +{
 403 +    return register_pernet_device(&imq_net_ops);
 404 +}
 405 +
 406 +module_init(imq_init);
 407 +//module_exit(imq_cleanup_module);
 408 +
 409 +module_param(numdevs, int, 0);
 410 +MODULE_PARM_DESC(numdevs, "number of IMQ devices (how many imq* devices will be created)");
 411 +MODULE_AUTHOR("http://www.linuximq.net");
 412 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
 413 +MODULE_LICENSE("GPL");
 414 diff -Naurw 2.6.24/drivers/net/Kconfig 2.6.24.imq/drivers/net/Kconfig
 415 --- 2.6.24/drivers/net/Kconfig  2008-01-24 19:58:37.000000000 -0300
 416 +++ 2.6.24.imq/drivers/net/Kconfig      2008-01-26 15:00:11.000000000 -0300
 417 @@ -112,6 +112,129 @@
 418           To compile this driver as a module, choose M here: the module
 419           will be called eql.  If unsure, say N.
 420
 421 +config IMQ
 422 +       tristate "IMQ (intermediate queueing device) support"
 423 +       depends on NETDEVICES && NETFILTER
 424 +       ---help---
 425 +         The IMQ device(s) is used as placeholder for QoS queueing
 426 +         disciplines. Every packet entering/leaving the IP stack can be
 427 +         directed through the IMQ device where it's enqueued/dequeued to the
 428 +         attached qdisc. This allows you to treat network devices as classes
 429 +         and distribute bandwidth among them. Iptables is used to specify
 430 +         through which IMQ device, if any, packets travel.
 431 +
 432 +         More information at: http://www.linuximq.net/
 433 +
 434 +         To compile this driver as a module, choose M here: the module
 435 +         will be called imq.  If unsure, say N.
 436 +
 437 +choice
 438 +       prompt "IMQ behavior (PRE/POSTROUTING)"
 439 +       depends on IMQ
 440 +       default IMQ_BEHAVIOR_BB
 441 +       help
 442 +
 443 +               This settings defines how IMQ behaves in respect to its
 444 +               hooking in PREROUTING and POSTROUTING.
 445 +
 446 +               IMQ can work in any of the following ways:
 447 +
 448 +                   PREROUTING   |      POSTROUTING
 449 +               -----------------|-------------------
 450 +               #1  After NAT    |      After NAT
 451 +               #2  After NAT    |      Before NAT
 452 +               #3  Before NAT   |      After NAT
 453 +               #4  Before NAT   |      Before NAT
 454 +
 455 +               The default behavior is to hook before NAT on PREROUTING
 456 +               and after NAT on POSTROUTING (#3).
 457 +
 458 +               This settings are specially usefull when trying to use IMQ
 459 +               to shape NATed clients.
 460 +
 461 +               More information can be found at: www.linuximq.net
 462 +
 463 +               If not sure leave the default settings alone.
 464 +
 465 +config IMQ_BEHAVIOR_AA
 466 +       bool "IMQ AA"
 467 +       help
 468 +               This settings defines how IMQ behaves in respect to its
 469 +               hooking in PREROUTING and POSTROUTING.
 470 +
 471 +               Choosing this option will make IMQ hook like this:
 472 +
 473 +               PREROUTING:   After NAT
 474 +               POSTROUTING:  After NAT
 475 +
 476 +               More information can be found at: www.linuximq.net
 477 +
 478 +               If not sure leave the default settings alone.
 479 +
 480 +config IMQ_BEHAVIOR_AB
 481 +       bool "IMQ AB"
 482 +       help
 483 +               This settings defines how IMQ behaves in respect to its
 484 +               hooking in PREROUTING and POSTROUTING.
 485 +
 486 +               Choosing this option will make IMQ hook like this:
 487 +
 488 +               PREROUTING:   After NAT
 489 +               POSTROUTING:  Before NAT
 490 +
 491 +               More information can be found at: www.linuximq.net
 492 +
 493 +               If not sure leave the default settings alone.
 494 +
 495 +config IMQ_BEHAVIOR_BA
 496 +       bool "IMQ BA"
 497 +       help
 498 +               This settings defines how IMQ behaves in respect to its
 499 +               hooking in PREROUTING and POSTROUTING.
 500 +
 501 +               Choosing this option will make IMQ hook like this:
 502 +
 503 +               PREROUTING:   Before NAT
 504 +               POSTROUTING:  After NAT
 505 +
 506 +               More information can be found at: www.linuximq.net
 507 +
 508 +               If not sure leave the default settings alone.
 509 +
 510 +config IMQ_BEHAVIOR_BB
 511 +       bool "IMQ BB"
 512 +       help
 513 +               This settings defines how IMQ behaves in respect to its
 514 +               hooking in PREROUTING and POSTROUTING.
 515 +
 516 +               Choosing this option will make IMQ hook like this:
 517 +
 518 +               PREROUTING:   Before NAT
 519 +               POSTROUTING:  Before NAT
 520 +
 521 +               More information can be found at: www.linuximq.net
 522 +
 523 +               If not sure leave the default settings alone.
 524 +
 525 +endchoice
 526 +
 527 +config IMQ_NUM_DEVS
 528 +
 529 +       int "Number of IMQ devices"
 530 +       range 2 16
 531 +       depends on IMQ
 532 +       default "16"
 533 +       help
 534 +
 535 +               This settings defines how many IMQ devices will be
 536 +               created.
 537 +
 538 +               The default value is 16.
 539 +
 540 +               More information can be found at: www.linuximq.net
 541 +
 542 +               If not sure leave the default settings alone.
 543 +
 544  config TUN
 545         tristate "Universal TUN/TAP device driver support"
 546         select CRC32
 547 diff -Naurw 2.6.24/drivers/net/Makefile 2.6.24.imq/drivers/net/Makefile
 548 --- 2.6.24/drivers/net/Makefile 2008-01-24 19:58:37.000000000 -0300
 549 +++ 2.6.24.imq/drivers/net/Makefile     2008-01-26 15:00:11.000000000 -0300
 550 @@ -139,6 +139,7 @@
 551  obj-$(CONFIG_XEN_NETDEV_FRONTEND) += xen-netfront.o
 552
 553  obj-$(CONFIG_DUMMY) += dummy.o
 554 +obj-$(CONFIG_IMQ) += imq.o
 555  obj-$(CONFIG_IFB) += ifb.o
 556  obj-$(CONFIG_MACVLAN) += macvlan.o
 557  obj-$(CONFIG_DE600) += de600.o
 558 diff -Naurw 2.6.24/include/linux/imq.h 2.6.24.imq/include/linux/imq.h
 559 --- 2.6.24/include/linux/imq.h  1969-12-31 21:00:00.000000000 -0300
 560 +++ 2.6.24.imq/include/linux/imq.h      2008-01-26 15:00:11.000000000 -0300
 561 @@ -0,0 +1,9 @@
 562 +#ifndef _IMQ_H
 563 +#define _IMQ_H
 564 +
 565 +#define IMQ_MAX_DEVS   16
 566 +
 567 +#define IMQ_F_IFMASK   0x7f
 568 +#define IMQ_F_ENQUEUE  0x80
 569 +
 570 +#endif /* _IMQ_H */
 571 diff -Naurw 2.6.24/include/linux/netfilter_ipv4/ipt_IMQ.h 2.6.24.imq/include/linux/netfilter_ipv4/ipt_IMQ.h
 572 --- 2.6.24/include/linux/netfilter_ipv4/ipt_IMQ.h       1969-12-31 21:00:00.000000000 -0300
 573 +++ 2.6.24.imq/include/linux/netfilter_ipv4/ipt_IMQ.h   2008-01-26 15:00:11.000000000 -0300
 574 @@ -0,0 +1,8 @@
 575 +#ifndef _IPT_IMQ_H
 576 +#define _IPT_IMQ_H
 577 +
 578 +struct ipt_imq_info {
 579 +       unsigned int todev;     /* target imq device */
 580 +};
 581 +
 582 +#endif /* _IPT_IMQ_H */
 583 diff -Naurw 2.6.24/include/linux/netfilter_ipv6/ip6t_IMQ.h 2.6.24.imq/include/linux/netfilter_ipv6/ip6t_IMQ.h
 584 --- 2.6.24/include/linux/netfilter_ipv6/ip6t_IMQ.h      1969-12-31 21:00:00.000000000 -0300
 585 +++ 2.6.24.imq/include/linux/netfilter_ipv6/ip6t_IMQ.h  2008-01-26 15:00:11.000000000 -0300
 586 @@ -0,0 +1,8 @@
 587 +#ifndef _IP6T_IMQ_H
 588 +#define _IP6T_IMQ_H
 589 +
 590 +struct ip6t_imq_info {
 591 +       unsigned int todev;     /* target imq device */
 592 +};
 593 +
 594 +#endif /* _IP6T_IMQ_H */
 595 diff -Naurw 2.6.24/include/linux/skbuff.h 2.6.24.imq/include/linux/skbuff.h
 596 --- 2.6.24/include/linux/skbuff.h       2008-01-24 19:58:37.000000000 -0300
 597 +++ 2.6.24.imq/include/linux/skbuff.h   2008-01-26 15:00:11.000000000 -0300
 598 @@ -295,6 +295,10 @@
 599         struct nf_conntrack     *nfct;
 600         struct sk_buff          *nfct_reasm;
 601  #endif
 602 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
 603 +       unsigned char           imq_flags;
 604 +       struct nf_info          *nf_info;
 605 +#endif
 606  #ifdef CONFIG_BRIDGE_NETFILTER
 607         struct nf_bridge_info   *nf_bridge;
 608  #endif
 609 @@ -1728,6 +1732,10 @@
 610         dst->nfct_reasm = src->nfct_reasm;
 611         nf_conntrack_get_reasm(src->nfct_reasm);
 612  #endif
 613 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
 614 +       dst->imq_flags = src->imq_flags;
 615 +       dst->nf_info = src->nf_info;
 616 +#endif
 617  #ifdef CONFIG_BRIDGE_NETFILTER
 618         dst->nf_bridge  = src->nf_bridge;
 619         nf_bridge_get(src->nf_bridge);
 620 diff -Naurw 2.6.24/net/core/dev.c 2.6.24.imq/net/core/dev.c
 621 --- 2.6.24/net/core/dev.c       2008-01-24 19:58:37.000000000 -0300
 622 +++ 2.6.24.imq/net/core/dev.c   2008-01-26 15:00:11.000000000 -0300
 623 @@ -95,6 +95,9 @@
 624  #include <net/net_namespace.h>
 625  #include <net/sock.h>
 626  #include <linux/rtnetlink.h>
 627 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
 628 +#include <linux/imq.h>
 629 +#endif
 630  #include <linux/proc_fs.h>
 631  #include <linux/seq_file.h>
 632  #include <linux/stat.h>
 633 @@ -1533,7 +1536,11 @@
 634  int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 635  {
 636         if (likely(!skb->next)) {
 637 -               if (!list_empty(&ptype_all))
 638 +               if (!list_empty(&ptype_all)
 639 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
 640 +                   && !(skb->imq_flags & IMQ_F_ENQUEUE)
 641 +#endif
 642 +                   )
 643                         dev_queue_xmit_nit(skb, dev);
 644
 645                 if (netif_needs_gso(dev, skb)) {
 646 diff -Naurw 2.6.24/net/ipv4/netfilter/ipt_IMQ.c 2.6.24.imq/net/ipv4/netfilter/ipt_IMQ.c
 647 --- 2.6.24/net/ipv4/netfilter/ipt_IMQ.c 1969-12-31 21:00:00.000000000 -0300
 648 +++ 2.6.24.imq/net/ipv4/netfilter/ipt_IMQ.c     2008-01-26 15:00:11.000000000 -0300
 649 @@ -0,0 +1,69 @@
 650 +/*
 651 + * This target marks packets to be enqueued to an imq device
 652 + */
 653 +#include <linux/module.h>
 654 +#include <linux/skbuff.h>
 655 +#include <linux/netfilter_ipv4/ip_tables.h>
 656 +#include <linux/netfilter_ipv4/ipt_IMQ.h>
 657 +#include <linux/imq.h>
 658 +
 659 +static unsigned int imq_target(struct sk_buff *pskb,
 660 +                              const struct net_device *in,
 661 +                              const struct net_device *out,
 662 +                              unsigned int hooknum,
 663 +                              const struct xt_target *target,
 664 +                              const void *targinfo)
 665 +{
 666 +       struct ipt_imq_info *mr = (struct ipt_imq_info*)targinfo;
 667 +
 668 +       pskb->imq_flags = mr->todev | IMQ_F_ENQUEUE;
 669 +
 670 +       return XT_CONTINUE;
 671 +}
 672 +
 673 +static bool imq_checkentry(const char *tablename,
 674 +                         const void *e,
 675 +                         const struct xt_target *target,
 676 +                         void *targinfo,
 677 +                         unsigned int hook_mask)
 678 +{
 679 +       struct ipt_imq_info *mr;
 680 +
 681 +       mr = (struct ipt_imq_info*)targinfo;
 682 +
 683 +       if (mr->todev > IMQ_MAX_DEVS) {
 684 +               printk(KERN_WARNING
 685 +                      "IMQ: invalid device specified, highest is %u\n",
 686 +                      IMQ_MAX_DEVS);
 687 +               return 0;
 688 +       }
 689 +
 690 +       return 1;
 691 +}
 692 +
 693 +static struct xt_target ipt_imq_reg = {
 694 +       .name           = "IMQ",
 695 +       .family         = AF_INET,
 696 +       .target         = imq_target,
 697 +       .targetsize     = sizeof(struct ipt_imq_info),
 698 +       .checkentry     = imq_checkentry,
 699 +       .me             = THIS_MODULE,
 700 +       .table          = "mangle"
 701 +};
 702 +
 703 +static int __init init(void)
 704 +{
 705 +       return xt_register_target(&ipt_imq_reg);
 706 +}
 707 +
 708 +static void __exit fini(void)
 709 +{
 710 +       xt_unregister_target(&ipt_imq_reg);
 711 +}
 712 +
 713 +module_init(init);
 714 +module_exit(fini);
 715 +
 716 +MODULE_AUTHOR("http://www.linuximq.net");
 717 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
 718 +MODULE_LICENSE("GPL");
 719 diff -Naurw 2.6.24/net/ipv4/netfilter/Kconfig 2.6.24.imq/net/ipv4/netfilter/Kconfig
 720 --- 2.6.24/net/ipv4/netfilter/Kconfig   2008-01-24 19:58:37.000000000 -0300
 721 +++ 2.6.24.imq/net/ipv4/netfilter/Kconfig       2008-01-26 15:00:11.000000000 -0300
 722 @@ -311,6 +311,17 @@
 723
 724           To compile it as a module, choose M here.  If unsure, say N.
 725
 726 +config IP_NF_TARGET_IMQ
 727 +       tristate "IMQ target support"
 728 +       depends on IP_NF_MANGLE
 729 +       help
 730 +         This option adds a `IMQ' target which is used to specify if and
 731 +         to which IMQ device packets should get enqueued/dequeued.
 732 +
 733 +        For more information visit: http://www.linuximq.net/
 734 +
 735 +         To compile it as a module, choose M here.  If unsure, say N.
 736 +
 737  config IP_NF_TARGET_ECN
 738         tristate "ECN target support"
 739         depends on IP_NF_MANGLE
 740 diff -Naurw 2.6.24/net/ipv4/netfilter/Makefile 2.6.24.imq/net/ipv4/netfilter/Makefile
 741 --- 2.6.24/net/ipv4/netfilter/Makefile  2008-01-24 19:58:37.000000000 -0300
 742 +++ 2.6.24.imq/net/ipv4/netfilter/Makefile      2008-01-26 15:00:11.000000000 -0300
 743 @@ -54,6 +54,7 @@
 744  obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
 745  obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o
 746  obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
 747 +obj-$(CONFIG_IP_NF_TARGET_IMQ) += ipt_IMQ.o
 748  obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
 749  obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.o
 750  obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
 751 diff -Naurw 2.6.24/net/ipv6/netfilter/ip6t_IMQ.c 2.6.24.imq/net/ipv6/netfilter/ip6t_IMQ.c
 752 --- 2.6.24/net/ipv6/netfilter/ip6t_IMQ.c        1969-12-31 21:00:00.000000000 -0300
 753 +++ 2.6.24.imq/net/ipv6/netfilter/ip6t_IMQ.c    2008-01-26 15:00:11.000000000 -0300
 754 @@ -0,0 +1,69 @@
 755 +/*
 756 + * This target marks packets to be enqueued to an imq device
 757 + */
 758 +#include <linux/module.h>
 759 +#include <linux/skbuff.h>
 760 +#include <linux/netfilter_ipv6/ip6_tables.h>
 761 +#include <linux/netfilter_ipv6/ip6t_IMQ.h>
 762 +#include <linux/imq.h>
 763 +
 764 +static unsigned int imq_target(struct sk_buff *pskb,
 765 +                              const struct net_device *in,
 766 +                              const struct net_device *out,
 767 +                              unsigned int hooknum,
 768 +                              const struct xt_target *target,
 769 +                              const void *targinfo)
 770 +{
 771 +       struct ip6t_imq_info *mr = (struct ip6t_imq_info*)targinfo;
 772 +
 773 +       pskb->imq_flags = mr->todev | IMQ_F_ENQUEUE;
 774 +
 775 +       return XT_CONTINUE;
 776 +}
 777 +
 778 +static bool imq_checkentry(const char *tablename,
 779 +                         const void *entry,
 780 +                         const struct xt_target *target,
 781 +                         void *targinfo,
 782 +                         unsigned int hook_mask)
 783 +{
 784 +       struct ip6t_imq_info *mr;
 785 +
 786 +       mr = (struct ip6t_imq_info*)targinfo;
 787 +
 788 +       if (mr->todev > IMQ_MAX_DEVS) {
 789 +               printk(KERN_WARNING
 790 +                      "IMQ: invalid device specified, highest is %u\n",
 791 +                      IMQ_MAX_DEVS);
 792 +               return 0;
 793 +       }
 794 +
 795 +       return 1;
 796 +}
 797 +
 798 +static struct xt_target ip6t_imq_reg = {
 799 +       .name           = "IMQ",
 800 +       .family         = AF_INET6,
 801 +       .target         = imq_target,
 802 +       .targetsize     = sizeof(struct ip6t_imq_info),
 803 +       .table          = "mangle",
 804 +       .checkentry     = imq_checkentry,
 805 +       .me             = THIS_MODULE
 806 +};
 807 +
 808 +static int __init init(void)
 809 +{
 810 +       return xt_register_target(&ip6t_imq_reg);
 811 +}
 812 +
 813 +static void __exit fini(void)
 814 +{
 815 +       xt_unregister_target(&ip6t_imq_reg);
 816 +}
 817 +
 818 +module_init(init);
 819 +module_exit(fini);
 820 +
 821 +MODULE_AUTHOR("http://www.linuximq.net");
 822 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
 823 +MODULE_LICENSE("GPL");
 824 diff -Naurw 2.6.24/net/ipv6/netfilter/Kconfig 2.6.24.imq/net/ipv6/netfilter/Kconfig
 825 --- 2.6.24/net/ipv6/netfilter/Kconfig   2008-01-24 19:58:37.000000000 -0300
 826 +++ 2.6.24.imq/net/ipv6/netfilter/Kconfig       2008-01-26 15:00:11.000000000 -0300
 827 @@ -173,6 +173,15 @@
 828
 829           To compile it as a module, choose M here.  If unsure, say N.
 830
 831 +config IP6_NF_TARGET_IMQ
 832 +       tristate "IMQ target support"
 833 +       depends on IP6_NF_MANGLE
 834 +       help
 835 +          This option adds a `IMQ' target which is used to specify if and
 836 +          to which imq device packets should get enqueued/dequeued.
 837 +
 838 +          To compile it as a module, choose M here.  If unsure, say N.
 839 +
 840  config IP6_NF_TARGET_HL
 841         tristate  'HL (hoplimit) target support'
 842         depends on IP6_NF_MANGLE
 843 diff -Naurw 2.6.24/net/ipv6/netfilter/Makefile 2.6.24.imq/net/ipv6/netfilter/Makefile
 844 --- 2.6.24/net/ipv6/netfilter/Makefile  2008-01-24 19:58:37.000000000 -0300
 845 +++ 2.6.24.imq/net/ipv6/netfilter/Makefile      2008-01-26 15:00:11.000000000 -0300
 846 @@ -6,6 +6,7 @@
 847  obj-$(CONFIG_IP6_NF_IPTABLES) += ip6_tables.o
 848  obj-$(CONFIG_IP6_NF_FILTER) += ip6table_filter.o
 849  obj-$(CONFIG_IP6_NF_MANGLE) += ip6table_mangle.o
 850 +obj-$(CONFIG_IP6_NF_TARGET_IMQ) += ip6t_IMQ.o
 851  obj-$(CONFIG_IP6_NF_QUEUE) += ip6_queue.o
 852  obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o
 853
 854 diff -Naurw 2.6.24/net/sched/sch_generic.c 2.6.24.imq/net/sched/sch_generic.c
 855 --- 2.6.24/net/sched/sch_generic.c      2008-01-24 19:58:37.000000000 -0300
 856 +++ 2.6.24.imq/net/sched/sch_generic.c  2008-01-26 15:00:11.000000000 -0300
 857 @@ -176,6 +176,13 @@
 858         return ret;
 859  }
 860
 861 +int qdisc_restart1(struct net_device *dev)
 862 +{
 863 +       return qdisc_restart(dev);
 864 +}
 865 +
 866 +EXPORT_SYMBOL(qdisc_restart1);
 867 +
 868  void __qdisc_run(struct net_device *dev)
 869  {
 870         do {