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[openwrt.git] / target / linux / generic-2.4 / patches / 608-netfilter_ipset.patch
1 Index: linux-2.4.35.4/Documentation/Configure.help
2 ===================================================================
3 --- linux-2.4.35.4.orig/Documentation/Configure.help 2007-12-15 05:20:07.284255349 +0100
4 +++ linux-2.4.35.4/Documentation/Configure.help 2007-12-15 05:20:07.880289314 +0100
5 @@ -3220,6 +3220,75 @@
6 If you want to compile it as a module, say M here and read
7 <file:Documentation/modules.txt>. If unsure, say `N'.
8
9 +IP set support
10 +CONFIG_IP_NF_SET
11 + This option adds IP set support to the kernel.
12 +
13 + In order to define and use sets, you need userlevel utilities: an
14 + iptables binary which knows about IP sets and the program ipset(8),
15 + by which you can define and setup the sets themselves.
16 +
17 + If you want to compile it as a module, say M here and read
18 + <file:Documentation/modules.txt>. If unsure, say `N'.
19 +
20 +set match support
21 +CONFIG_IP_NF_MATCH_SET
22 + This option adds IP set match support.
23 + You need the ipset utility to create and set up the sets.
24 +
25 + If you want to compile it as a module, say M here and read
26 + <file:Documentation/modules.txt>. If unsure, say `N'.
27 +
28 +SET target support
29 +CONFIG_IP_NF_TARGET_SET
30 + This option adds IP set target support.
31 + You need the ipset utility to create and set up the sets.
32 +
33 + If you want to compile it as a module, say M here and read
34 + <file:Documentation/modules.txt>. If unsure, say `N'.
35 +
36 +ipmap set type support
37 +CONFIG_IP_NF_SET_IPMAP
38 + This option adds the ipmap set type support.
39 +
40 + If you want to compile it as a module, say M here and read
41 + <file:Documentation/modules.txt>. If unsure, say `N'.
42 +
43 +macipmap set type support
44 +CONFIG_IP_NF_SET_MACIPMAP
45 + This option adds the macipmap set type support.
46 +
47 + If you want to compile it as a module, say M here and read
48 + <file:Documentation/modules.txt>. If unsure, say `N'.
49 +
50 +portmap set type support
51 +CONFIG_IP_NF_SET_PORTMAP
52 + This option adds the portmap set type support.
53 +
54 + If you want to compile it as a module, say M here and read
55 + <file:Documentation/modules.txt>. If unsure, say `N'.
56 +
57 +iphash set type support
58 +CONFIG_IP_NF_SET_IPHASH
59 + This option adds the iphash set type support.
60 +
61 + If you want to compile it as a module, say M here and read
62 + <file:Documentation/modules.txt>. If unsure, say `N'.
63 +
64 +nethash set type support
65 +CONFIG_IP_NF_SET_NETHASH
66 + This option adds the nethash set type support.
67 +
68 + If you want to compile it as a module, say M here and read
69 + <file:Documentation/modules.txt>. If unsure, say `N'.
70 +
71 +iptree set type support
72 +CONFIG_IP_NF_SET_IPTREE
73 + This option adds the iptree set type support.
74 +
75 + If you want to compile it as a module, say M here and read
76 + <file:Documentation/modules.txt>. If unsure, say `N'.
77 +
78 TTL target support
79 CONFIG_IP_NF_TARGET_TTL
80 This option adds a `TTL' target, which enables the user to set
81 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set.h
82 ===================================================================
83 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
84 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set.h 2007-12-15 05:20:07.884289543 +0100
85 @@ -0,0 +1,489 @@
86 +#ifndef _IP_SET_H
87 +#define _IP_SET_H
88 +
89 +/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
90 + * Patrick Schaaf <bof@bof.de>
91 + * Martin Josefsson <gandalf@wlug.westbo.se>
92 + * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
93 + *
94 + * This program is free software; you can redistribute it and/or modify
95 + * it under the terms of the GNU General Public License version 2 as
96 + * published by the Free Software Foundation.
97 + */
98 +
99 +/*
100 + * A sockopt of such quality has hardly ever been seen before on the open
101 + * market! This little beauty, hardly ever used: above 64, so it's
102 + * traditionally used for firewalling, not touched (even once!) by the
103 + * 2.0, 2.2 and 2.4 kernels!
104 + *
105 + * Comes with its own certificate of authenticity, valid anywhere in the
106 + * Free world!
107 + *
108 + * Rusty, 19.4.2000
109 + */
110 +#define SO_IP_SET 83
111 +
112 +/*
113 + * Heavily modify by Joakim Axelsson 08.03.2002
114 + * - Made it more modulebased
115 + *
116 + * Additional heavy modifications by Jozsef Kadlecsik 22.02.2004
117 + * - bindings added
118 + * - in order to "deal with" backward compatibility, renamed to ipset
119 + */
120 +
121 +/*
122 + * Used so that the kernel module and ipset-binary can match their versions
123 + */
124 +#define IP_SET_PROTOCOL_VERSION 2
125 +
126 +#define IP_SET_MAXNAMELEN 32 /* set names and set typenames */
127 +
128 +/* Lets work with our own typedef for representing an IP address.
129 + * We hope to make the code more portable, possibly to IPv6...
130 + *
131 + * The representation works in HOST byte order, because most set types
132 + * will perform arithmetic operations and compare operations.
133 + *
134 + * For now the type is an uint32_t.
135 + *
136 + * Make sure to ONLY use the functions when translating and parsing
137 + * in order to keep the host byte order and make it more portable:
138 + * parse_ip()
139 + * parse_mask()
140 + * parse_ipandmask()
141 + * ip_tostring()
142 + * (Joakim: where are they???)
143 + */
144 +
145 +typedef uint32_t ip_set_ip_t;
146 +
147 +/* Sets are identified by an id in kernel space. Tweak with ip_set_id_t
148 + * and IP_SET_INVALID_ID if you want to increase the max number of sets.
149 + */
150 +typedef uint16_t ip_set_id_t;
151 +
152 +#define IP_SET_INVALID_ID 65535
153 +
154 +/* How deep we follow bindings */
155 +#define IP_SET_MAX_BINDINGS 6
156 +
157 +/*
158 + * Option flags for kernel operations (ipt_set_info)
159 + */
160 +#define IPSET_SRC 0x01 /* Source match/add */
161 +#define IPSET_DST 0x02 /* Destination match/add */
162 +#define IPSET_MATCH_INV 0x04 /* Inverse matching */
163 +
164 +/*
165 + * Set types (flavours)
166 + */
167 +#define IPSET_TYPE_IP 0 /* IP address type of set */
168 +#define IPSET_TYPE_PORT 1 /* Port type of set */
169 +
170 +/* Reserved keywords */
171 +#define IPSET_TOKEN_DEFAULT ":default:"
172 +#define IPSET_TOKEN_ALL ":all:"
173 +
174 +/* SO_IP_SET operation constants, and their request struct types.
175 + *
176 + * Operation ids:
177 + * 0-99: commands with version checking
178 + * 100-199: add/del/test/bind/unbind
179 + * 200-299: list, save, restore
180 + */
181 +
182 +/* Single shot operations:
183 + * version, create, destroy, flush, rename and swap
184 + *
185 + * Sets are identified by name.
186 + */
187 +
188 +#define IP_SET_REQ_STD \
189 + unsigned op; \
190 + unsigned version; \
191 + char name[IP_SET_MAXNAMELEN]
192 +
193 +#define IP_SET_OP_CREATE 0x00000001 /* Create a new (empty) set */
194 +struct ip_set_req_create {
195 + IP_SET_REQ_STD;
196 + char typename[IP_SET_MAXNAMELEN];
197 +};
198 +
199 +#define IP_SET_OP_DESTROY 0x00000002 /* Remove a (empty) set */
200 +struct ip_set_req_std {
201 + IP_SET_REQ_STD;
202 +};
203 +
204 +#define IP_SET_OP_FLUSH 0x00000003 /* Remove all IPs in a set */
205 +/* Uses ip_set_req_std */
206 +
207 +#define IP_SET_OP_RENAME 0x00000004 /* Rename a set */
208 +/* Uses ip_set_req_create */
209 +
210 +#define IP_SET_OP_SWAP 0x00000005 /* Swap two sets */
211 +/* Uses ip_set_req_create */
212 +
213 +union ip_set_name_index {
214 + char name[IP_SET_MAXNAMELEN];
215 + ip_set_id_t index;
216 +};
217 +
218 +#define IP_SET_OP_GET_BYNAME 0x00000006 /* Get set index by name */
219 +struct ip_set_req_get_set {
220 + unsigned op;
221 + unsigned version;
222 + union ip_set_name_index set;
223 +};
224 +
225 +#define IP_SET_OP_GET_BYINDEX 0x00000007 /* Get set name by index */
226 +/* Uses ip_set_req_get_set */
227 +
228 +#define IP_SET_OP_VERSION 0x00000100 /* Ask kernel version */
229 +struct ip_set_req_version {
230 + unsigned op;
231 + unsigned version;
232 +};
233 +
234 +/* Double shots operations:
235 + * add, del, test, bind and unbind.
236 + *
237 + * First we query the kernel to get the index and type of the target set,
238 + * then issue the command. Validity of IP is checked in kernel in order
239 + * to minimalize sockopt operations.
240 + */
241 +
242 +/* Get minimal set data for add/del/test/bind/unbind IP */
243 +#define IP_SET_OP_ADT_GET 0x00000010 /* Get set and type */
244 +struct ip_set_req_adt_get {
245 + unsigned op;
246 + unsigned version;
247 + union ip_set_name_index set;
248 + char typename[IP_SET_MAXNAMELEN];
249 +};
250 +
251 +#define IP_SET_REQ_BYINDEX \
252 + unsigned op; \
253 + ip_set_id_t index;
254 +
255 +struct ip_set_req_adt {
256 + IP_SET_REQ_BYINDEX;
257 +};
258 +
259 +#define IP_SET_OP_ADD_IP 0x00000101 /* Add an IP to a set */
260 +/* Uses ip_set_req_adt, with type specific addage */
261 +
262 +#define IP_SET_OP_DEL_IP 0x00000102 /* Remove an IP from a set */
263 +/* Uses ip_set_req_adt, with type specific addage */
264 +
265 +#define IP_SET_OP_TEST_IP 0x00000103 /* Test an IP in a set */
266 +/* Uses ip_set_req_adt, with type specific addage */
267 +
268 +#define IP_SET_OP_BIND_SET 0x00000104 /* Bind an IP to a set */
269 +/* Uses ip_set_req_bind, with type specific addage */
270 +struct ip_set_req_bind {
271 + IP_SET_REQ_BYINDEX;
272 + char binding[IP_SET_MAXNAMELEN];
273 +};
274 +
275 +#define IP_SET_OP_UNBIND_SET 0x00000105 /* Unbind an IP from a set */
276 +/* Uses ip_set_req_bind, with type speficic addage
277 + * index = 0 means unbinding for all sets */
278 +
279 +#define IP_SET_OP_TEST_BIND_SET 0x00000106 /* Test binding an IP to a set */
280 +/* Uses ip_set_req_bind, with type specific addage */
281 +
282 +/* Multiple shots operations: list, save, restore.
283 + *
284 + * - check kernel version and query the max number of sets
285 + * - get the basic information on all sets
286 + * and size required for the next step
287 + * - get actual set data: header, data, bindings
288 + */
289 +
290 +/* Get max_sets and the index of a queried set
291 + */
292 +#define IP_SET_OP_MAX_SETS 0x00000020
293 +struct ip_set_req_max_sets {
294 + unsigned op;
295 + unsigned version;
296 + ip_set_id_t max_sets; /* max_sets */
297 + ip_set_id_t sets; /* real number of sets */
298 + union ip_set_name_index set; /* index of set if name used */
299 +};
300 +
301 +/* Get the id and name of the sets plus size for next step */
302 +#define IP_SET_OP_LIST_SIZE 0x00000201
303 +#define IP_SET_OP_SAVE_SIZE 0x00000202
304 +struct ip_set_req_setnames {
305 + unsigned op;
306 + ip_set_id_t index; /* set to list/save */
307 + size_t size; /* size to get setdata/bindings */
308 + /* followed by sets number of struct ip_set_name_list */
309 +};
310 +
311 +struct ip_set_name_list {
312 + char name[IP_SET_MAXNAMELEN];
313 + char typename[IP_SET_MAXNAMELEN];
314 + ip_set_id_t index;
315 + ip_set_id_t id;
316 +};
317 +
318 +/* The actual list operation */
319 +#define IP_SET_OP_LIST 0x00000203
320 +struct ip_set_req_list {
321 + IP_SET_REQ_BYINDEX;
322 + /* sets number of struct ip_set_list in reply */
323 +};
324 +
325 +struct ip_set_list {
326 + ip_set_id_t index;
327 + ip_set_id_t binding;
328 + u_int32_t ref;
329 + size_t header_size; /* Set header data of header_size */
330 + size_t members_size; /* Set members data of members_size */
331 + size_t bindings_size; /* Set bindings data of bindings_size */
332 +};
333 +
334 +struct ip_set_hash_list {
335 + ip_set_ip_t ip;
336 + ip_set_id_t binding;
337 +};
338 +
339 +/* The save operation */
340 +#define IP_SET_OP_SAVE 0x00000204
341 +/* Uses ip_set_req_list, in the reply replaced by
342 + * sets number of struct ip_set_save plus a marker
343 + * ip_set_save followed by ip_set_hash_save structures.
344 + */
345 +struct ip_set_save {
346 + ip_set_id_t index;
347 + ip_set_id_t binding;
348 + size_t header_size; /* Set header data of header_size */
349 + size_t members_size; /* Set members data of members_size */
350 +};
351 +
352 +/* At restoring, ip == 0 means default binding for the given set: */
353 +struct ip_set_hash_save {
354 + ip_set_ip_t ip;
355 + ip_set_id_t id;
356 + ip_set_id_t binding;
357 +};
358 +
359 +/* The restore operation */
360 +#define IP_SET_OP_RESTORE 0x00000205
361 +/* Uses ip_set_req_setnames followed by ip_set_restore structures
362 + * plus a marker ip_set_restore, followed by ip_set_hash_save
363 + * structures.
364 + */
365 +struct ip_set_restore {
366 + char name[IP_SET_MAXNAMELEN];
367 + char typename[IP_SET_MAXNAMELEN];
368 + ip_set_id_t index;
369 + size_t header_size; /* Create data of header_size */
370 + size_t members_size; /* Set members data of members_size */
371 +};
372 +
373 +static inline int bitmap_bytes(ip_set_ip_t a, ip_set_ip_t b)
374 +{
375 + return 4 * ((((b - a + 8) / 8) + 3) / 4);
376 +}
377 +
378 +#ifdef __KERNEL__
379 +
380 +#define ip_set_printk(format, args...) \
381 + do { \
382 + printk("%s: %s: ", __FILE__, __FUNCTION__); \
383 + printk(format "\n" , ## args); \
384 + } while (0)
385 +
386 +#if defined(IP_SET_DEBUG)
387 +#define DP(format, args...) \
388 + do { \
389 + printk("%s: %s (DBG): ", __FILE__, __FUNCTION__);\
390 + printk(format "\n" , ## args); \
391 + } while (0)
392 +#define IP_SET_ASSERT(x) \
393 + do { \
394 + if (!(x)) \
395 + printk("IP_SET_ASSERT: %s:%i(%s)\n", \
396 + __FILE__, __LINE__, __FUNCTION__); \
397 + } while (0)
398 +#else
399 +#define DP(format, args...)
400 +#define IP_SET_ASSERT(x)
401 +#endif
402 +
403 +struct ip_set;
404 +
405 +/*
406 + * The ip_set_type definition - one per set type, e.g. "ipmap".
407 + *
408 + * Each individual set has a pointer, set->type, going to one
409 + * of these structures. Function pointers inside the structure implement
410 + * the real behaviour of the sets.
411 + *
412 + * If not mentioned differently, the implementation behind the function
413 + * pointers of a set_type, is expected to return 0 if ok, and a negative
414 + * errno (e.g. -EINVAL) on error.
415 + */
416 +struct ip_set_type {
417 + struct list_head list; /* next in list of set types */
418 +
419 + /* test for IP in set (kernel: iptables -m set src|dst)
420 + * return 0 if not in set, 1 if in set.
421 + */
422 + int (*testip_kernel) (struct ip_set *set,
423 + const struct sk_buff * skb,
424 + u_int32_t flags,
425 + ip_set_ip_t *ip);
426 +
427 + /* test for IP in set (userspace: ipset -T set IP)
428 + * return 0 if not in set, 1 if in set.
429 + */
430 + int (*testip) (struct ip_set *set,
431 + const void *data, size_t size,
432 + ip_set_ip_t *ip);
433 +
434 + /*
435 + * Size of the data structure passed by when
436 + * adding/deletin/testing an entry.
437 + */
438 + size_t reqsize;
439 +
440 + /* Add IP into set (userspace: ipset -A set IP)
441 + * Return -EEXIST if the address is already in the set,
442 + * and -ERANGE if the address lies outside the set bounds.
443 + * If the address was not already in the set, 0 is returned.
444 + */
445 + int (*addip) (struct ip_set *set,
446 + const void *data, size_t size,
447 + ip_set_ip_t *ip);
448 +
449 + /* Add IP into set (kernel: iptables ... -j SET set src|dst)
450 + * Return -EEXIST if the address is already in the set,
451 + * and -ERANGE if the address lies outside the set bounds.
452 + * If the address was not already in the set, 0 is returned.
453 + */
454 + int (*addip_kernel) (struct ip_set *set,
455 + const struct sk_buff * skb,
456 + u_int32_t flags,
457 + ip_set_ip_t *ip);
458 +
459 + /* remove IP from set (userspace: ipset -D set --entry x)
460 + * Return -EEXIST if the address is NOT in the set,
461 + * and -ERANGE if the address lies outside the set bounds.
462 + * If the address really was in the set, 0 is returned.
463 + */
464 + int (*delip) (struct ip_set *set,
465 + const void *data, size_t size,
466 + ip_set_ip_t *ip);
467 +
468 + /* remove IP from set (kernel: iptables ... -j SET --entry x)
469 + * Return -EEXIST if the address is NOT in the set,
470 + * and -ERANGE if the address lies outside the set bounds.
471 + * If the address really was in the set, 0 is returned.
472 + */
473 + int (*delip_kernel) (struct ip_set *set,
474 + const struct sk_buff * skb,
475 + u_int32_t flags,
476 + ip_set_ip_t *ip);
477 +
478 + /* new set creation - allocated type specific items
479 + */
480 + int (*create) (struct ip_set *set,
481 + const void *data, size_t size);
482 +
483 + /* retry the operation after successfully tweaking the set
484 + */
485 + int (*retry) (struct ip_set *set);
486 +
487 + /* set destruction - free type specific items
488 + * There is no return value.
489 + * Can be called only when child sets are destroyed.
490 + */
491 + void (*destroy) (struct ip_set *set);
492 +
493 + /* set flushing - reset all bits in the set, or something similar.
494 + * There is no return value.
495 + */
496 + void (*flush) (struct ip_set *set);
497 +
498 + /* Listing: size needed for header
499 + */
500 + size_t header_size;
501 +
502 + /* Listing: Get the header
503 + *
504 + * Fill in the information in "data".
505 + * This function is always run after list_header_size() under a
506 + * writelock on the set. Therefor is the length of "data" always
507 + * correct.
508 + */
509 + void (*list_header) (const struct ip_set *set,
510 + void *data);
511 +
512 + /* Listing: Get the size for the set members
513 + */
514 + int (*list_members_size) (const struct ip_set *set);
515 +
516 + /* Listing: Get the set members
517 + *
518 + * Fill in the information in "data".
519 + * This function is always run after list_member_size() under a
520 + * writelock on the set. Therefor is the length of "data" always
521 + * correct.
522 + */
523 + void (*list_members) (const struct ip_set *set,
524 + void *data);
525 +
526 + char typename[IP_SET_MAXNAMELEN];
527 + char typecode;
528 + int protocol_version;
529 +
530 + /* Set this to THIS_MODULE if you are a module, otherwise NULL */
531 + struct module *me;
532 +};
533 +
534 +extern int ip_set_register_set_type(struct ip_set_type *set_type);
535 +extern void ip_set_unregister_set_type(struct ip_set_type *set_type);
536 +
537 +/* A generic ipset */
538 +struct ip_set {
539 + char name[IP_SET_MAXNAMELEN]; /* the name of the set */
540 + rwlock_t lock; /* lock for concurrency control */
541 + ip_set_id_t id; /* set id for swapping */
542 + ip_set_id_t binding; /* default binding for the set */
543 + atomic_t ref; /* in kernel and in hash references */
544 + struct ip_set_type *type; /* the set types */
545 + void *data; /* pooltype specific data */
546 +};
547 +
548 +/* Structure to bind set elements to sets */
549 +struct ip_set_hash {
550 + struct list_head list; /* list of clashing entries in hash */
551 + ip_set_ip_t ip; /* ip from set */
552 + ip_set_id_t id; /* set id */
553 + ip_set_id_t binding; /* set we bind the element to */
554 +};
555 +
556 +/* register and unregister set references */
557 +extern ip_set_id_t ip_set_get_byname(const char name[IP_SET_MAXNAMELEN]);
558 +extern ip_set_id_t ip_set_get_byindex(ip_set_id_t id);
559 +extern void ip_set_put(ip_set_id_t id);
560 +
561 +/* API for iptables set match, and SET target */
562 +extern void ip_set_addip_kernel(ip_set_id_t id,
563 + const struct sk_buff *skb,
564 + const u_int32_t *flags);
565 +extern void ip_set_delip_kernel(ip_set_id_t id,
566 + const struct sk_buff *skb,
567 + const u_int32_t *flags);
568 +extern int ip_set_testip_kernel(ip_set_id_t id,
569 + const struct sk_buff *skb,
570 + const u_int32_t *flags);
571 +
572 +#endif /* __KERNEL__ */
573 +
574 +#endif /*_IP_SET_H*/
575 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_iphash.h
576 ===================================================================
577 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
578 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_iphash.h 2007-12-15 05:20:07.884289543 +0100
579 @@ -0,0 +1,30 @@
580 +#ifndef __IP_SET_IPHASH_H
581 +#define __IP_SET_IPHASH_H
582 +
583 +#include <linux/netfilter_ipv4/ip_set.h>
584 +
585 +#define SETTYPE_NAME "iphash"
586 +#define MAX_RANGE 0x0000FFFF
587 +
588 +struct ip_set_iphash {
589 + ip_set_ip_t *members; /* the iphash proper */
590 + uint32_t initval; /* initval for jhash_1word */
591 + uint32_t prime; /* prime for double hashing */
592 + uint32_t hashsize; /* hash size */
593 + uint16_t probes; /* max number of probes */
594 + uint16_t resize; /* resize factor in percent */
595 + ip_set_ip_t netmask; /* netmask */
596 +};
597 +
598 +struct ip_set_req_iphash_create {
599 + uint32_t hashsize;
600 + uint16_t probes;
601 + uint16_t resize;
602 + ip_set_ip_t netmask;
603 +};
604 +
605 +struct ip_set_req_iphash {
606 + ip_set_ip_t ip;
607 +};
608 +
609 +#endif /* __IP_SET_IPHASH_H */
610 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_ipmap.h
611 ===================================================================
612 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
613 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_ipmap.h 2007-12-15 05:20:07.884289543 +0100
614 @@ -0,0 +1,56 @@
615 +#ifndef __IP_SET_IPMAP_H
616 +#define __IP_SET_IPMAP_H
617 +
618 +#include <linux/netfilter_ipv4/ip_set.h>
619 +
620 +#define SETTYPE_NAME "ipmap"
621 +#define MAX_RANGE 0x0000FFFF
622 +
623 +struct ip_set_ipmap {
624 + void *members; /* the ipmap proper */
625 + ip_set_ip_t first_ip; /* host byte order, included in range */
626 + ip_set_ip_t last_ip; /* host byte order, included in range */
627 + ip_set_ip_t netmask; /* subnet netmask */
628 + ip_set_ip_t sizeid; /* size of set in IPs */
629 + u_int16_t hosts; /* number of hosts in a subnet */
630 +};
631 +
632 +struct ip_set_req_ipmap_create {
633 + ip_set_ip_t from;
634 + ip_set_ip_t to;
635 + ip_set_ip_t netmask;
636 +};
637 +
638 +struct ip_set_req_ipmap {
639 + ip_set_ip_t ip;
640 +};
641 +
642 +unsigned int
643 +mask_to_bits(ip_set_ip_t mask)
644 +{
645 + unsigned int bits = 32;
646 + ip_set_ip_t maskaddr;
647 +
648 + if (mask == 0xFFFFFFFF)
649 + return bits;
650 +
651 + maskaddr = 0xFFFFFFFE;
652 + while (--bits >= 0 && maskaddr != mask)
653 + maskaddr <<= 1;
654 +
655 + return bits;
656 +}
657 +
658 +ip_set_ip_t
659 +range_to_mask(ip_set_ip_t from, ip_set_ip_t to, unsigned int *bits)
660 +{
661 + ip_set_ip_t mask = 0xFFFFFFFE;
662 +
663 + *bits = 32;
664 + while (--(*bits) >= 0 && mask && (to & mask) != from)
665 + mask <<= 1;
666 +
667 + return mask;
668 +}
669 +
670 +#endif /* __IP_SET_IPMAP_H */
671 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_iptree.h
672 ===================================================================
673 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
674 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_iptree.h 2007-12-15 05:20:07.884289543 +0100
675 @@ -0,0 +1,39 @@
676 +#ifndef __IP_SET_IPTREE_H
677 +#define __IP_SET_IPTREE_H
678 +
679 +#include <linux/netfilter_ipv4/ip_set.h>
680 +
681 +#define SETTYPE_NAME "iptree"
682 +#define MAX_RANGE 0x0000FFFF
683 +
684 +struct ip_set_iptreed {
685 + unsigned long expires[255]; /* x.x.x.ADDR */
686 +};
687 +
688 +struct ip_set_iptreec {
689 + struct ip_set_iptreed *tree[255]; /* x.x.ADDR.* */
690 +};
691 +
692 +struct ip_set_iptreeb {
693 + struct ip_set_iptreec *tree[255]; /* x.ADDR.*.* */
694 +};
695 +
696 +struct ip_set_iptree {
697 + unsigned int timeout;
698 + unsigned int gc_interval;
699 +#ifdef __KERNEL__
700 + struct timer_list gc;
701 + struct ip_set_iptreeb *tree[255]; /* ADDR.*.*.* */
702 +#endif
703 +};
704 +
705 +struct ip_set_req_iptree_create {
706 + unsigned int timeout;
707 +};
708 +
709 +struct ip_set_req_iptree {
710 + ip_set_ip_t ip;
711 + unsigned int timeout;
712 +};
713 +
714 +#endif /* __IP_SET_IPTREE_H */
715 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_jhash.h
716 ===================================================================
717 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
718 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_jhash.h 2007-12-15 05:20:07.884289543 +0100
719 @@ -0,0 +1,148 @@
720 +#ifndef _LINUX_IPSET_JHASH_H
721 +#define _LINUX_IPSET_JHASH_H
722 +
723 +/* This is a copy of linux/jhash.h but the types u32/u8 are changed
724 + * to __u32/__u8 so that the header file can be included into
725 + * userspace code as well. Jozsef Kadlecsik (kadlec@blackhole.kfki.hu)
726 + */
727 +
728 +/* jhash.h: Jenkins hash support.
729 + *
730 + * Copyright (C) 1996 Bob Jenkins (bob_jenkins@burtleburtle.net)
731 + *
732 + * http://burtleburtle.net/bob/hash/
733 + *
734 + * These are the credits from Bob's sources:
735 + *
736 + * lookup2.c, by Bob Jenkins, December 1996, Public Domain.
737 + * hash(), hash2(), hash3, and mix() are externally useful functions.
738 + * Routines to test the hash are included if SELF_TEST is defined.
739 + * You can use this free for any purpose. It has no warranty.
740 + *
741 + * Copyright (C) 2003 David S. Miller (davem@redhat.com)
742 + *
743 + * I've modified Bob's hash to be useful in the Linux kernel, and
744 + * any bugs present are surely my fault. -DaveM
745 + */
746 +
747 +/* NOTE: Arguments are modified. */
748 +#define __jhash_mix(a, b, c) \
749 +{ \
750 + a -= b; a -= c; a ^= (c>>13); \
751 + b -= c; b -= a; b ^= (a<<8); \
752 + c -= a; c -= b; c ^= (b>>13); \
753 + a -= b; a -= c; a ^= (c>>12); \
754 + b -= c; b -= a; b ^= (a<<16); \
755 + c -= a; c -= b; c ^= (b>>5); \
756 + a -= b; a -= c; a ^= (c>>3); \
757 + b -= c; b -= a; b ^= (a<<10); \
758 + c -= a; c -= b; c ^= (b>>15); \
759 +}
760 +
761 +/* The golden ration: an arbitrary value */
762 +#define JHASH_GOLDEN_RATIO 0x9e3779b9
763 +
764 +/* The most generic version, hashes an arbitrary sequence
765 + * of bytes. No alignment or length assumptions are made about
766 + * the input key.
767 + */
768 +static inline __u32 jhash(void *key, __u32 length, __u32 initval)
769 +{
770 + __u32 a, b, c, len;
771 + __u8 *k = key;
772 +
773 + len = length;
774 + a = b = JHASH_GOLDEN_RATIO;
775 + c = initval;
776 +
777 + while (len >= 12) {
778 + a += (k[0] +((__u32)k[1]<<8) +((__u32)k[2]<<16) +((__u32)k[3]<<24));
779 + b += (k[4] +((__u32)k[5]<<8) +((__u32)k[6]<<16) +((__u32)k[7]<<24));
780 + c += (k[8] +((__u32)k[9]<<8) +((__u32)k[10]<<16)+((__u32)k[11]<<24));
781 +
782 + __jhash_mix(a,b,c);
783 +
784 + k += 12;
785 + len -= 12;
786 + }
787 +
788 + c += length;
789 + switch (len) {
790 + case 11: c += ((__u32)k[10]<<24);
791 + case 10: c += ((__u32)k[9]<<16);
792 + case 9 : c += ((__u32)k[8]<<8);
793 + case 8 : b += ((__u32)k[7]<<24);
794 + case 7 : b += ((__u32)k[6]<<16);
795 + case 6 : b += ((__u32)k[5]<<8);
796 + case 5 : b += k[4];
797 + case 4 : a += ((__u32)k[3]<<24);
798 + case 3 : a += ((__u32)k[2]<<16);
799 + case 2 : a += ((__u32)k[1]<<8);
800 + case 1 : a += k[0];
801 + };
802 +
803 + __jhash_mix(a,b,c);
804 +
805 + return c;
806 +}
807 +
808 +/* A special optimized version that handles 1 or more of __u32s.
809 + * The length parameter here is the number of __u32s in the key.
810 + */
811 +static inline __u32 jhash2(__u32 *k, __u32 length, __u32 initval)
812 +{
813 + __u32 a, b, c, len;
814 +
815 + a = b = JHASH_GOLDEN_RATIO;
816 + c = initval;
817 + len = length;
818 +
819 + while (len >= 3) {
820 + a += k[0];
821 + b += k[1];
822 + c += k[2];
823 + __jhash_mix(a, b, c);
824 + k += 3; len -= 3;
825 + }
826 +
827 + c += length * 4;
828 +
829 + switch (len) {
830 + case 2 : b += k[1];
831 + case 1 : a += k[0];
832 + };
833 +
834 + __jhash_mix(a,b,c);
835 +
836 + return c;
837 +}
838 +
839 +
840 +/* A special ultra-optimized versions that knows they are hashing exactly
841 + * 3, 2 or 1 word(s).
842 + *
843 + * NOTE: In partilar the "c += length; __jhash_mix(a,b,c);" normally
844 + * done at the end is not done here.
845 + */
846 +static inline __u32 jhash_3words(__u32 a, __u32 b, __u32 c, __u32 initval)
847 +{
848 + a += JHASH_GOLDEN_RATIO;
849 + b += JHASH_GOLDEN_RATIO;
850 + c += initval;
851 +
852 + __jhash_mix(a, b, c);
853 +
854 + return c;
855 +}
856 +
857 +static inline __u32 jhash_2words(__u32 a, __u32 b, __u32 initval)
858 +{
859 + return jhash_3words(a, b, 0, initval);
860 +}
861 +
862 +static inline __u32 jhash_1word(__u32 a, __u32 initval)
863 +{
864 + return jhash_3words(a, 0, 0, initval);
865 +}
866 +
867 +#endif /* _LINUX_IPSET_JHASH_H */
868 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_macipmap.h
869 ===================================================================
870 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
871 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_macipmap.h 2007-12-15 05:20:07.884289543 +0100
872 @@ -0,0 +1,38 @@
873 +#ifndef __IP_SET_MACIPMAP_H
874 +#define __IP_SET_MACIPMAP_H
875 +
876 +#include <linux/netfilter_ipv4/ip_set.h>
877 +
878 +#define SETTYPE_NAME "macipmap"
879 +#define MAX_RANGE 0x0000FFFF
880 +
881 +/* general flags */
882 +#define IPSET_MACIP_MATCHUNSET 1
883 +
884 +/* per ip flags */
885 +#define IPSET_MACIP_ISSET 1
886 +
887 +struct ip_set_macipmap {
888 + void *members; /* the macipmap proper */
889 + ip_set_ip_t first_ip; /* host byte order, included in range */
890 + ip_set_ip_t last_ip; /* host byte order, included in range */
891 + u_int32_t flags;
892 +};
893 +
894 +struct ip_set_req_macipmap_create {
895 + ip_set_ip_t from;
896 + ip_set_ip_t to;
897 + u_int32_t flags;
898 +};
899 +
900 +struct ip_set_req_macipmap {
901 + ip_set_ip_t ip;
902 + unsigned char ethernet[ETH_ALEN];
903 +};
904 +
905 +struct ip_set_macip {
906 + unsigned short flags;
907 + unsigned char ethernet[ETH_ALEN];
908 +};
909 +
910 +#endif /* __IP_SET_MACIPMAP_H */
911 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_malloc.h
912 ===================================================================
913 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
914 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_malloc.h 2007-12-15 05:20:07.888289773 +0100
915 @@ -0,0 +1,27 @@
916 +#ifndef _IP_SET_MALLOC_H
917 +#define _IP_SET_MALLOC_H
918 +
919 +#ifdef __KERNEL__
920 +
921 +/* Memory allocation and deallocation */
922 +static size_t max_malloc_size = 131072; /* Guaranteed: slab.c */
923 +
924 +static inline void * ip_set_malloc(size_t bytes)
925 +{
926 + if (bytes > max_malloc_size)
927 + return vmalloc(bytes);
928 + else
929 + return kmalloc(bytes, GFP_KERNEL);
930 +}
931 +
932 +static inline void ip_set_free(void * data, size_t bytes)
933 +{
934 + if (bytes > max_malloc_size)
935 + vfree(data);
936 + else
937 + kfree(data);
938 +}
939 +
940 +#endif /* __KERNEL__ */
941 +
942 +#endif /*_IP_SET_MALLOC_H*/
943 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_nethash.h
944 ===================================================================
945 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
946 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_nethash.h 2007-12-15 05:20:07.888289773 +0100
947 @@ -0,0 +1,55 @@
948 +#ifndef __IP_SET_NETHASH_H
949 +#define __IP_SET_NETHASH_H
950 +
951 +#include <linux/netfilter_ipv4/ip_set.h>
952 +
953 +#define SETTYPE_NAME "nethash"
954 +#define MAX_RANGE 0x0000FFFF
955 +
956 +struct ip_set_nethash {
957 + ip_set_ip_t *members; /* the nethash proper */
958 + uint32_t initval; /* initval for jhash_1word */
959 + uint32_t prime; /* prime for double hashing */
960 + uint32_t hashsize; /* hash size */
961 + uint16_t probes; /* max number of probes */
962 + uint16_t resize; /* resize factor in percent */
963 + unsigned char cidr[30]; /* CIDR sizes */
964 +};
965 +
966 +struct ip_set_req_nethash_create {
967 + uint32_t hashsize;
968 + uint16_t probes;
969 + uint16_t resize;
970 +};
971 +
972 +struct ip_set_req_nethash {
973 + ip_set_ip_t ip;
974 + unsigned char cidr;
975 +};
976 +
977 +static unsigned char shifts[] = {255, 253, 249, 241, 225, 193, 129, 1};
978 +
979 +static inline ip_set_ip_t
980 +pack(ip_set_ip_t ip, unsigned char cidr)
981 +{
982 + ip_set_ip_t addr, *paddr = &addr;
983 + unsigned char n, t, *a;
984 +
985 + addr = htonl(ip & (0xFFFFFFFF << (32 - (cidr))));
986 +#ifdef __KERNEL__
987 + DP("ip:%u.%u.%u.%u/%u", NIPQUAD(addr), cidr);
988 +#endif
989 + n = cidr / 8;
990 + t = cidr % 8;
991 + a = &((unsigned char *)paddr)[n];
992 + *a = *a /(1 << (8 - t)) + shifts[t];
993 +#ifdef __KERNEL__
994 + DP("n: %u, t: %u, a: %u", n, t, *a);
995 + DP("ip:%u.%u.%u.%u/%u, %u.%u.%u.%u",
996 + HIPQUAD(ip), cidr, NIPQUAD(addr));
997 +#endif
998 +
999 + return ntohl(addr);
1000 +}
1001 +
1002 +#endif /* __IP_SET_NETHASH_H */
1003 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_portmap.h
1004 ===================================================================
1005 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
1006 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_portmap.h 2007-12-15 05:20:07.888289773 +0100
1007 @@ -0,0 +1,25 @@
1008 +#ifndef __IP_SET_PORTMAP_H
1009 +#define __IP_SET_PORTMAP_H
1010 +
1011 +#include <linux/netfilter_ipv4/ip_set.h>
1012 +
1013 +#define SETTYPE_NAME "portmap"
1014 +#define MAX_RANGE 0x0000FFFF
1015 +#define INVALID_PORT (MAX_RANGE + 1)
1016 +
1017 +struct ip_set_portmap {
1018 + void *members; /* the portmap proper */
1019 + ip_set_ip_t first_port; /* host byte order, included in range */
1020 + ip_set_ip_t last_port; /* host byte order, included in range */
1021 +};
1022 +
1023 +struct ip_set_req_portmap_create {
1024 + ip_set_ip_t from;
1025 + ip_set_ip_t to;
1026 +};
1027 +
1028 +struct ip_set_req_portmap {
1029 + ip_set_ip_t port;
1030 +};
1031 +
1032 +#endif /* __IP_SET_PORTMAP_H */
1033 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_prime.h
1034 ===================================================================
1035 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
1036 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ip_set_prime.h 2007-12-15 05:20:07.888289773 +0100
1037 @@ -0,0 +1,34 @@
1038 +#ifndef __IP_SET_PRIME_H
1039 +#define __IP_SET_PRIME_H
1040 +
1041 +static inline unsigned make_prime_bound(unsigned nr)
1042 +{
1043 + unsigned long long nr64 = nr;
1044 + unsigned long long x = 1;
1045 + nr = 1;
1046 + while (x <= nr64) { x <<= 2; nr <<= 1; }
1047 + return nr;
1048 +}
1049 +
1050 +static inline int make_prime_check(unsigned nr)
1051 +{
1052 + unsigned x = 3;
1053 + unsigned b = make_prime_bound(nr);
1054 + while (x <= b) {
1055 + if (0 == (nr % x)) return 0;
1056 + x += 2;
1057 + }
1058 + return 1;
1059 +}
1060 +
1061 +static unsigned make_prime(unsigned nr)
1062 +{
1063 + if (0 == (nr & 1)) nr--;
1064 + while (nr > 1) {
1065 + if (make_prime_check(nr)) return nr;
1066 + nr -= 2;
1067 + }
1068 + return 2;
1069 +}
1070 +
1071 +#endif /* __IP_SET_PRIME_H */
1072 Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ipt_set.h
1073 ===================================================================
1074 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
1075 +++ linux-2.4.35.4/include/linux/netfilter_ipv4/ipt_set.h 2007-12-15 05:20:07.888289773 +0100
1076 @@ -0,0 +1,21 @@
1077 +#ifndef _IPT_SET_H
1078 +#define _IPT_SET_H
1079 +
1080 +#include <linux/netfilter_ipv4/ip_set.h>
1081 +
1082 +struct ipt_set_info {
1083 + ip_set_id_t index;
1084 + u_int32_t flags[IP_SET_MAX_BINDINGS + 1];
1085 +};
1086 +
1087 +/* match info */
1088 +struct ipt_set_info_match {
1089 + struct ipt_set_info match_set;
1090 +};
1091 +
1092 +struct ipt_set_info_target {
1093 + struct ipt_set_info add_set;
1094 + struct ipt_set_info del_set;
1095 +};
1096 +
1097 +#endif /*_IPT_SET_H*/
1098 Index: linux-2.4.35.4/net/ipv4/netfilter/Config.in
1099 ===================================================================
1100 --- linux-2.4.35.4.orig/net/ipv4/netfilter/Config.in 2007-12-15 05:20:07.568271536 +0100
1101 +++ linux-2.4.35.4/net/ipv4/netfilter/Config.in 2007-12-15 05:20:07.892290000 +0100
1102 @@ -22,6 +22,20 @@
1103 if [ "$CONFIG_IP_NF_IPTABLES" != "n" ]; then
1104 # The simple matches.
1105 dep_tristate ' limit match support' CONFIG_IP_NF_MATCH_LIMIT $CONFIG_IP_NF_IPTABLES
1106 +
1107 + dep_tristate ' IP set support' CONFIG_IP_NF_SET $CONFIG_IP_NF_IPTABLES
1108 + if [ "$CONFIG_IP_NF_SET" != "n" ]; then
1109 + int ' Maximum number of sets' CONFIG_IP_NF_SET_MAX 256
1110 + int ' Hash size for bindings of IP sets' CONFIG_IP_NF_SET_HASHSIZE 1024
1111 + dep_tristate ' set match support' CONFIG_IP_NF_MATCH_SET $CONFIG_IP_NF_SET
1112 + dep_tristate ' SET target support' CONFIG_IP_NF_TARGET_SET $CONFIG_IP_NF_SET
1113 + dep_tristate ' ipmap set type support' CONFIG_IP_NF_SET_IPMAP $CONFIG_IP_NF_SET
1114 + dep_tristate ' portmap set type support' CONFIG_IP_NF_SET_PORTMAP $CONFIG_IP_NF_SET
1115 + dep_tristate ' macipmap set type support' CONFIG_IP_NF_SET_MACIPMAP $CONFIG_IP_NF_SET
1116 + dep_tristate ' iphash set type support' CONFIG_IP_NF_SET_IPHASH $CONFIG_IP_NF_SET
1117 + dep_tristate ' nethash set type support' CONFIG_IP_NF_SET_NETHASH $CONFIG_IP_NF_SET
1118 + dep_tristate ' iptree set type support' CONFIG_IP_NF_SET_IPTREE $CONFIG_IP_NF_SET
1119 + fi
1120 dep_tristate ' MAC address match support' CONFIG_IP_NF_MATCH_MAC $CONFIG_IP_NF_IPTABLES
1121 dep_tristate ' Packet type match support' CONFIG_IP_NF_MATCH_PKTTYPE $CONFIG_IP_NF_IPTABLES
1122 dep_tristate ' netfilter MARK match support' CONFIG_IP_NF_MATCH_MARK $CONFIG_IP_NF_IPTABLES
1123 Index: linux-2.4.35.4/net/ipv4/netfilter/ip_set.c
1124 ===================================================================
1125 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
1126 +++ linux-2.4.35.4/net/ipv4/netfilter/ip_set.c 2007-12-15 05:20:07.892290000 +0100
1127 @@ -0,0 +1,2002 @@
1128 +/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
1129 + * Patrick Schaaf <bof@bof.de>
1130 + * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
1131 + *
1132 + * This program is free software; you can redistribute it and/or modify
1133 + * it under the terms of the GNU General Public License version 2 as
1134 + * published by the Free Software Foundation.
1135 + */
1136 +
1137 +/* Kernel module for IP set management */
1138 +
1139 +#include <linux/config.h>
1140 +#include <linux/module.h>
1141 +#include <linux/kmod.h>
1142 +#include <linux/ip.h>
1143 +#include <linux/skbuff.h>
1144 +#include <linux/random.h>
1145 +#include <linux/jhash.h>
1146 +#include <linux/netfilter_ipv4/ip_tables.h>
1147 +#include <linux/errno.h>
1148 +#include <asm/uaccess.h>
1149 +#include <asm/bitops.h>
1150 +#include <asm/softirq.h>
1151 +#include <asm/semaphore.h>
1152 +#include <linux/spinlock.h>
1153 +#include <linux/vmalloc.h>
1154 +
1155 +#define ASSERT_READ_LOCK(x) /* dont use that */
1156 +#define ASSERT_WRITE_LOCK(x)
1157 +#include <linux/netfilter_ipv4/listhelp.h>
1158 +#include <linux/netfilter_ipv4/ip_set.h>
1159 +
1160 +static struct list_head set_type_list; /* all registered sets */
1161 +static struct ip_set **ip_set_list; /* all individual sets */
1162 +static DECLARE_RWLOCK(ip_set_lock); /* protects the lists and the hash */
1163 +static DECLARE_MUTEX(ip_set_app_mutex); /* serializes user access */
1164 +static ip_set_id_t ip_set_max = CONFIG_IP_NF_SET_MAX;
1165 +static ip_set_id_t ip_set_bindings_hash_size = CONFIG_IP_NF_SET_HASHSIZE;
1166 +static struct list_head *ip_set_hash; /* hash of bindings */
1167 +static unsigned int ip_set_hash_random; /* random seed */
1168 +
1169 +/* Arrgh */
1170 +#ifdef MODULE
1171 +#define __MOD_INC(foo) __MOD_INC_USE_COUNT(foo)
1172 +#define __MOD_DEC(foo) __MOD_DEC_USE_COUNT(foo)
1173 +#define __MOD_INC_SELF MOD_INC_USE_COUNT
1174 +#define __MOD_DEC_SELF MOD_DEC_USE_COUNT
1175 +#else
1176 +#define __MOD_INC(foo)
1177 +#define __MOD_DEC(foo)
1178 +#define __MOD_INC_SELF
1179 +#define __MOD_DEC_SELF
1180 +#endif
1181 +
1182 +/*
1183 + * Sets are identified either by the index in ip_set_list or by id.
1184 + * The id never changes and is used to find a key in the hash.
1185 + * The index may change by swapping and used at all other places
1186 + * (set/SET netfilter modules, binding value, etc.)
1187 + *
1188 + * Userspace requests are serialized by ip_set_mutex and sets can
1189 + * be deleted only from userspace. Therefore ip_set_list locking
1190 + * must obey the following rules:
1191 + *
1192 + * - kernel requests: read and write locking mandatory
1193 + * - user requests: read locking optional, write locking mandatory
1194 + */
1195 +
1196 +static inline void
1197 +__ip_set_get(ip_set_id_t index)
1198 +{
1199 + atomic_inc(&ip_set_list[index]->ref);
1200 +}
1201 +
1202 +static inline void
1203 +__ip_set_put(ip_set_id_t index)
1204 +{
1205 + atomic_dec(&ip_set_list[index]->ref);
1206 +}
1207 +
1208 +/*
1209 + * Binding routines
1210 + */
1211 +
1212 +static inline int
1213 +ip_hash_cmp(const struct ip_set_hash *set_hash,
1214 + ip_set_id_t id, ip_set_ip_t ip)
1215 +{
1216 + return set_hash->id == id && set_hash->ip == ip;
1217 +}
1218 +
1219 +static ip_set_id_t
1220 +ip_set_find_in_hash(ip_set_id_t id, ip_set_ip_t ip)
1221 +{
1222 + u_int32_t key = jhash_2words(id, ip, ip_set_hash_random)
1223 + % ip_set_bindings_hash_size;
1224 + struct ip_set_hash *set_hash;
1225 +
1226 + MUST_BE_READ_LOCKED(&ip_set_lock);
1227 + IP_SET_ASSERT(ip_set_list[id]);
1228 + DP("set: %s, ip: %u.%u.%u.%u", ip_set_list[id]->name, HIPQUAD(ip));
1229 +
1230 + set_hash = LIST_FIND(&ip_set_hash[key], ip_hash_cmp,
1231 + struct ip_set_hash *, id, ip);
1232 +
1233 + DP("set: %s, ip: %u.%u.%u.%u, binding: %s", ip_set_list[id]->name,
1234 + HIPQUAD(ip),
1235 + set_hash != NULL ? ip_set_list[set_hash->binding]->name : "");
1236 +
1237 + return (set_hash != NULL ? set_hash->binding : IP_SET_INVALID_ID);
1238 +}
1239 +
1240 +static inline void
1241 +__set_hash_del(struct ip_set_hash *set_hash)
1242 +{
1243 + MUST_BE_WRITE_LOCKED(&ip_set_lock);
1244 + IP_SET_ASSERT(ip_set_list[set_hash->binding]);
1245 +
1246 + __ip_set_put(set_hash->binding);
1247 + list_del(&set_hash->list);
1248 + kfree(set_hash);
1249 +}
1250 +
1251 +static int
1252 +ip_set_hash_del(ip_set_id_t id, ip_set_ip_t ip)
1253 +{
1254 + u_int32_t key = jhash_2words(id, ip, ip_set_hash_random)
1255 + % ip_set_bindings_hash_size;
1256 + struct ip_set_hash *set_hash;
1257 +
1258 + IP_SET_ASSERT(ip_set_list[id]);
1259 + DP("set: %s, ip: %u.%u.%u.%u", ip_set_list[id]->name, HIPQUAD(ip));
1260 + WRITE_LOCK(&ip_set_lock);
1261 + set_hash = LIST_FIND(&ip_set_hash[key], ip_hash_cmp,
1262 + struct ip_set_hash *, id, ip);
1263 + DP("set: %s, ip: %u.%u.%u.%u, binding: %s", ip_set_list[id]->name,
1264 + HIPQUAD(ip),
1265 + set_hash != NULL ? ip_set_list[set_hash->binding]->name : "");
1266 +
1267 + if (set_hash != NULL)
1268 + __set_hash_del(set_hash);
1269 + WRITE_UNLOCK(&ip_set_lock);
1270 + return 0;
1271 +}
1272 +
1273 +static int
1274 +ip_set_hash_add(ip_set_id_t id, ip_set_ip_t ip, ip_set_id_t binding)
1275 +{
1276 + u_int32_t key = jhash_2words(id, ip, ip_set_hash_random)
1277 + % ip_set_bindings_hash_size;
1278 + struct ip_set_hash *set_hash;
1279 + int ret = 0;
1280 +
1281 + IP_SET_ASSERT(ip_set_list[id]);
1282 + IP_SET_ASSERT(ip_set_list[binding]);
1283 + DP("set: %s, ip: %u.%u.%u.%u, binding: %s", ip_set_list[id]->name,
1284 + HIPQUAD(ip), ip_set_list[binding]->name);
1285 + WRITE_LOCK(&ip_set_lock);
1286 + set_hash = LIST_FIND(&ip_set_hash[key], ip_hash_cmp,
1287 + struct ip_set_hash *, id, ip);
1288 + if (!set_hash) {
1289 + set_hash = kmalloc(sizeof(struct ip_set_hash), GFP_KERNEL);
1290 + if (!set_hash) {
1291 + ret = -ENOMEM;
1292 + goto unlock;
1293 + }
1294 + INIT_LIST_HEAD(&set_hash->list);
1295 + set_hash->id = id;
1296 + set_hash->ip = ip;
1297 + list_add(&ip_set_hash[key], &set_hash->list);
1298 + } else {
1299 + IP_SET_ASSERT(ip_set_list[set_hash->binding]);
1300 + DP("overwrite binding: %s",
1301 + ip_set_list[set_hash->binding]->name);
1302 + __ip_set_put(set_hash->binding);
1303 + }
1304 + set_hash->binding = binding;
1305 + __ip_set_get(set_hash->binding);
1306 + unlock:
1307 + WRITE_UNLOCK(&ip_set_lock);
1308 + return ret;
1309 +}
1310 +
1311 +#define FOREACH_HASH_DO(fn, args...) \
1312 +({ \
1313 + ip_set_id_t __key; \
1314 + struct ip_set_hash *__set_hash; \
1315 + \
1316 + for (__key = 0; __key < ip_set_bindings_hash_size; __key++) { \
1317 + list_for_each_entry(__set_hash, &ip_set_hash[__key], list) \
1318 + fn(__set_hash , ## args); \
1319 + } \
1320 +})
1321 +
1322 +#define FOREACH_HASH_RW_DO(fn, args...) \
1323 +({ \
1324 + ip_set_id_t __key; \
1325 + struct ip_set_hash *__set_hash, *__n; \
1326 + \
1327 + MUST_BE_WRITE_LOCKED(&ip_set_lock); \
1328 + for (__key = 0; __key < ip_set_bindings_hash_size; __key++) { \
1329 + list_for_each_entry_safe(__set_hash, __n, &ip_set_hash[__key], list)\
1330 + fn(__set_hash , ## args); \
1331 + } \
1332 +})
1333 +
1334 +/* Add, del and test set entries from kernel */
1335 +
1336 +#define follow_bindings(index, set, ip) \
1337 +((index = ip_set_find_in_hash((set)->id, ip)) != IP_SET_INVALID_ID \
1338 + || (index = (set)->binding) != IP_SET_INVALID_ID)
1339 +
1340 +int
1341 +ip_set_testip_kernel(ip_set_id_t index,
1342 + const struct sk_buff *skb,
1343 + const u_int32_t *flags)
1344 +{
1345 + struct ip_set *set;
1346 + ip_set_ip_t ip;
1347 + int res, i = 0;
1348 +
1349 + IP_SET_ASSERT(flags[i]);
1350 + READ_LOCK(&ip_set_lock);
1351 + do {
1352 + set = ip_set_list[index];
1353 + IP_SET_ASSERT(set);
1354 + DP("set %s, index %u", set->name, index);
1355 + read_lock_bh(&set->lock);
1356 + res = set->type->testip_kernel(set, skb, flags[i], &ip);
1357 + read_unlock_bh(&set->lock);
1358 + } while (res > 0
1359 + && flags[++i]
1360 + && follow_bindings(index, set, ip));
1361 + READ_UNLOCK(&ip_set_lock);
1362 +
1363 + return res;
1364 +}
1365 +
1366 +void
1367 +ip_set_addip_kernel(ip_set_id_t index,
1368 + const struct sk_buff *skb,
1369 + const u_int32_t *flags)
1370 +{
1371 + struct ip_set *set;
1372 + ip_set_ip_t ip;
1373 + int res, i= 0;
1374 +
1375 + IP_SET_ASSERT(flags[i]);
1376 + retry:
1377 + READ_LOCK(&ip_set_lock);
1378 + do {
1379 + set = ip_set_list[index];
1380 + IP_SET_ASSERT(set);
1381 + DP("set %s, index %u", set->name, index);
1382 + write_lock_bh(&set->lock);
1383 + res = set->type->addip_kernel(set, skb, flags[i], &ip);
1384 + write_unlock_bh(&set->lock);
1385 + } while ((res == 0 || res == -EEXIST)
1386 + && flags[++i]
1387 + && follow_bindings(index, set, ip));
1388 + READ_UNLOCK(&ip_set_lock);
1389 +
1390 + if (res == -EAGAIN
1391 + && set->type->retry
1392 + && (res = set->type->retry(set)) == 0)
1393 + goto retry;
1394 +}
1395 +
1396 +void
1397 +ip_set_delip_kernel(ip_set_id_t index,
1398 + const struct sk_buff *skb,
1399 + const u_int32_t *flags)
1400 +{
1401 + struct ip_set *set;
1402 + ip_set_ip_t ip;
1403 + int res, i = 0;
1404 +
1405 + IP_SET_ASSERT(flags[i]);
1406 + READ_LOCK(&ip_set_lock);
1407 + do {
1408 + set = ip_set_list[index];
1409 + IP_SET_ASSERT(set);
1410 + DP("set %s, index %u", set->name, index);
1411 + write_lock_bh(&set->lock);
1412 + res = set->type->delip_kernel(set, skb, flags[i], &ip);
1413 + write_unlock_bh(&set->lock);
1414 + } while ((res == 0 || res == -EEXIST)
1415 + && flags[++i]
1416 + && follow_bindings(index, set, ip));
1417 + READ_UNLOCK(&ip_set_lock);
1418 +}
1419 +
1420 +/* Register and deregister settype */
1421 +
1422 +static inline int
1423 +set_type_equal(const struct ip_set_type *set_type, const char *str2)
1424 +{
1425 + return !strncmp(set_type->typename, str2, IP_SET_MAXNAMELEN - 1);
1426 +}
1427 +
1428 +static inline struct ip_set_type *
1429 +find_set_type(const char *name)
1430 +{
1431 + return LIST_FIND(&set_type_list,
1432 + set_type_equal,
1433 + struct ip_set_type *,
1434 + name);
1435 +}
1436 +
1437 +int
1438 +ip_set_register_set_type(struct ip_set_type *set_type)
1439 +{
1440 + int ret = 0;
1441 +
1442 + if (set_type->protocol_version != IP_SET_PROTOCOL_VERSION) {
1443 + ip_set_printk("'%s' uses wrong protocol version %u (want %u)",
1444 + set_type->typename,
1445 + set_type->protocol_version,
1446 + IP_SET_PROTOCOL_VERSION);
1447 + return -EINVAL;
1448 + }
1449 +
1450 + WRITE_LOCK(&ip_set_lock);
1451 + if (find_set_type(set_type->typename)) {
1452 + /* Duplicate! */
1453 + ip_set_printk("'%s' already registered!",
1454 + set_type->typename);
1455 + ret = -EINVAL;
1456 + goto unlock;
1457 + }
1458 + __MOD_INC_SELF;
1459 + list_append(&set_type_list, set_type);
1460 + DP("'%s' registered.", set_type->typename);
1461 + unlock:
1462 + WRITE_UNLOCK(&ip_set_lock);
1463 + return ret;
1464 +}
1465 +
1466 +void
1467 +ip_set_unregister_set_type(struct ip_set_type *set_type)
1468 +{
1469 + WRITE_LOCK(&ip_set_lock);
1470 + if (!find_set_type(set_type->typename)) {
1471 + ip_set_printk("'%s' not registered?",
1472 + set_type->typename);
1473 + goto unlock;
1474 + }
1475 + LIST_DELETE(&set_type_list, set_type);
1476 + __MOD_DEC_SELF;
1477 + DP("'%s' unregistered.", set_type->typename);
1478 + unlock:
1479 + WRITE_UNLOCK(&ip_set_lock);
1480 +
1481 +}
1482 +
1483 +/*
1484 + * Userspace routines
1485 + */
1486 +
1487 +/*
1488 + * Find set by name, reference it once. The reference makes sure the
1489 + * thing pointed to, does not go away under our feet. Drop the reference
1490 + * later, using ip_set_put().
1491 + */
1492 +ip_set_id_t
1493 +ip_set_get_byname(const char *name)
1494 +{
1495 + ip_set_id_t i, index = IP_SET_INVALID_ID;
1496 +
1497 + down(&ip_set_app_mutex);
1498 + for (i = 0; i < ip_set_max; i++) {
1499 + if (ip_set_list[i] != NULL
1500 + && strcmp(ip_set_list[i]->name, name) == 0) {
1501 + __ip_set_get(i);
1502 + index = i;
1503 + break;
1504 + }
1505 + }
1506 + up(&ip_set_app_mutex);
1507 + return index;
1508 +}
1509 +
1510 +/*
1511 + * Find set by index, reference it once. The reference makes sure the
1512 + * thing pointed to, does not go away under our feet. Drop the reference
1513 + * later, using ip_set_put().
1514 + */
1515 +ip_set_id_t
1516 +ip_set_get_byindex(ip_set_id_t index)
1517 +{
1518 + down(&ip_set_app_mutex);
1519 +
1520 + if (index >= ip_set_max)
1521 + return IP_SET_INVALID_ID;
1522 +
1523 + if (ip_set_list[index])
1524 + __ip_set_get(index);
1525 + else
1526 + index = IP_SET_INVALID_ID;
1527 +
1528 + up(&ip_set_app_mutex);
1529 + return index;
1530 +}
1531 +
1532 +/*
1533 + * If the given set pointer points to a valid set, decrement
1534 + * reference count by 1. The caller shall not assume the index
1535 + * to be valid, after calling this function.
1536 + */
1537 +void ip_set_put(ip_set_id_t index)
1538 +{
1539 + down(&ip_set_app_mutex);
1540 + if (ip_set_list[index])
1541 + __ip_set_put(index);
1542 + up(&ip_set_app_mutex);
1543 +}
1544 +
1545 +/* Find a set by name or index */
1546 +static ip_set_id_t
1547 +ip_set_find_byname(const char *name)
1548 +{
1549 + ip_set_id_t i, index = IP_SET_INVALID_ID;
1550 +
1551 + for (i = 0; i < ip_set_max; i++) {
1552 + if (ip_set_list[i] != NULL
1553 + && strcmp(ip_set_list[i]->name, name) == 0) {
1554 + index = i;
1555 + break;
1556 + }
1557 + }
1558 + return index;
1559 +}
1560 +
1561 +static ip_set_id_t
1562 +ip_set_find_byindex(ip_set_id_t index)
1563 +{
1564 + if (index >= ip_set_max || ip_set_list[index] == NULL)
1565 + index = IP_SET_INVALID_ID;
1566 +
1567 + return index;
1568 +}
1569 +
1570 +/*
1571 + * Add, del, test, bind and unbind
1572 + */
1573 +
1574 +static inline int
1575 +__ip_set_testip(struct ip_set *set,
1576 + const void *data,
1577 + size_t size,
1578 + ip_set_ip_t *ip)
1579 +{
1580 + int res;
1581 +
1582 + read_lock_bh(&set->lock);
1583 + res = set->type->testip(set, data, size, ip);
1584 + read_unlock_bh(&set->lock);
1585 +
1586 + return res;
1587 +}
1588 +
1589 +static int
1590 +__ip_set_addip(ip_set_id_t index,
1591 + const void *data,
1592 + size_t size)
1593 +{
1594 + struct ip_set *set = ip_set_list[index];
1595 + ip_set_ip_t ip;
1596 + int res;
1597 +
1598 + IP_SET_ASSERT(set);
1599 + do {
1600 + write_lock_bh(&set->lock);
1601 + res = set->type->addip(set, data, size, &ip);
1602 + write_unlock_bh(&set->lock);
1603 + } while (res == -EAGAIN
1604 + && set->type->retry
1605 + && (res = set->type->retry(set)) == 0);
1606 +
1607 + return res;
1608 +}
1609 +
1610 +static int
1611 +ip_set_addip(ip_set_id_t index,
1612 + const void *data,
1613 + size_t size)
1614 +{
1615 +
1616 + return __ip_set_addip(index,
1617 + data + sizeof(struct ip_set_req_adt),
1618 + size - sizeof(struct ip_set_req_adt));
1619 +}
1620 +
1621 +static int
1622 +ip_set_delip(ip_set_id_t index,
1623 + const void *data,
1624 + size_t size)
1625 +{
1626 + struct ip_set *set = ip_set_list[index];
1627 + ip_set_ip_t ip;
1628 + int res;
1629 +
1630 + IP_SET_ASSERT(set);
1631 + write_lock_bh(&set->lock);
1632 + res = set->type->delip(set,
1633 + data + sizeof(struct ip_set_req_adt),
1634 + size - sizeof(struct ip_set_req_adt),
1635 + &ip);
1636 + write_unlock_bh(&set->lock);
1637 +
1638 + return res;
1639 +}
1640 +
1641 +static int
1642 +ip_set_testip(ip_set_id_t index,
1643 + const void *data,
1644 + size_t size)
1645 +{
1646 + struct ip_set *set = ip_set_list[index];
1647 + ip_set_ip_t ip;
1648 + int res;
1649 +
1650 + IP_SET_ASSERT(set);
1651 + res = __ip_set_testip(set,
1652 + data + sizeof(struct ip_set_req_adt),
1653 + size - sizeof(struct ip_set_req_adt),
1654 + &ip);
1655 +
1656 + return (res > 0 ? -EEXIST : res);
1657 +}
1658 +
1659 +static int
1660 +ip_set_bindip(ip_set_id_t index,
1661 + const void *data,
1662 + size_t size)
1663 +{
1664 + struct ip_set *set = ip_set_list[index];
1665 + struct ip_set_req_bind *req_bind;
1666 + ip_set_id_t binding;
1667 + ip_set_ip_t ip;
1668 + int res;
1669 +
1670 + IP_SET_ASSERT(set);
1671 + if (size < sizeof(struct ip_set_req_bind))
1672 + return -EINVAL;
1673 +
1674 + req_bind = (struct ip_set_req_bind *) data;
1675 + req_bind->binding[IP_SET_MAXNAMELEN - 1] = '\0';
1676 +
1677 + if (strcmp(req_bind->binding, IPSET_TOKEN_DEFAULT) == 0) {
1678 + /* Default binding of a set */
1679 + char *binding_name;
1680 +
1681 + if (size != sizeof(struct ip_set_req_bind) + IP_SET_MAXNAMELEN)
1682 + return -EINVAL;
1683 +
1684 + binding_name = (char *)(data + sizeof(struct ip_set_req_bind));
1685 + binding_name[IP_SET_MAXNAMELEN - 1] = '\0';
1686 +
1687 + binding = ip_set_find_byname(binding_name);
1688 + if (binding == IP_SET_INVALID_ID)
1689 + return -ENOENT;
1690 +
1691 + WRITE_LOCK(&ip_set_lock);
1692 + /* Sets as binding values are referenced */
1693 + if (set->binding != IP_SET_INVALID_ID)
1694 + __ip_set_put(set->binding);
1695 + set->binding = binding;
1696 + __ip_set_get(set->binding);
1697 + WRITE_UNLOCK(&ip_set_lock);
1698 +
1699 + return 0;
1700 + }
1701 + binding = ip_set_find_byname(req_bind->binding);
1702 + if (binding == IP_SET_INVALID_ID)
1703 + return -ENOENT;
1704 +
1705 + res = __ip_set_testip(set,
1706 + data + sizeof(struct ip_set_req_bind),
1707 + size - sizeof(struct ip_set_req_bind),
1708 + &ip);
1709 + DP("set %s, ip: %u.%u.%u.%u, binding %s",
1710 + set->name, HIPQUAD(ip), ip_set_list[binding]->name);
1711 +
1712 + if (res >= 0)
1713 + res = ip_set_hash_add(set->id, ip, binding);
1714 +
1715 + return res;
1716 +}
1717 +
1718 +#define FOREACH_SET_DO(fn, args...) \
1719 +({ \
1720 + ip_set_id_t __i; \
1721 + struct ip_set *__set; \
1722 + \
1723 + for (__i = 0; __i < ip_set_max; __i++) { \
1724 + __set = ip_set_list[__i]; \
1725 + if (__set != NULL) \
1726 + fn(__set , ##args); \
1727 + } \
1728 +})
1729 +
1730 +static inline void
1731 +__set_hash_del_byid(struct ip_set_hash *set_hash, ip_set_id_t id)
1732 +{
1733 + if (set_hash->id == id)
1734 + __set_hash_del(set_hash);
1735 +}
1736 +
1737 +static inline void
1738 +__unbind_default(struct ip_set *set)
1739 +{
1740 + if (set->binding != IP_SET_INVALID_ID) {
1741 + /* Sets as binding values are referenced */
1742 + __ip_set_put(set->binding);
1743 + set->binding = IP_SET_INVALID_ID;
1744 + }
1745 +}
1746 +
1747 +static int
1748 +ip_set_unbindip(ip_set_id_t index,
1749 + const void *data,
1750 + size_t size)
1751 +{
1752 + struct ip_set *set;
1753 + struct ip_set_req_bind *req_bind;
1754 + ip_set_ip_t ip;
1755 + int res;
1756 +
1757 + DP("");
1758 + if (size < sizeof(struct ip_set_req_bind))
1759 + return -EINVAL;
1760 +
1761 + req_bind = (struct ip_set_req_bind *) data;
1762 + req_bind->binding[IP_SET_MAXNAMELEN - 1] = '\0';
1763 +
1764 + DP("%u %s", index, req_bind->binding);
1765 + if (index == IP_SET_INVALID_ID) {
1766 + /* unbind :all: */
1767 + if (strcmp(req_bind->binding, IPSET_TOKEN_DEFAULT) == 0) {
1768 + /* Default binding of sets */
1769 + WRITE_LOCK(&ip_set_lock);
1770 + FOREACH_SET_DO(__unbind_default);
1771 + WRITE_UNLOCK(&ip_set_lock);
1772 + return 0;
1773 + } else if (strcmp(req_bind->binding, IPSET_TOKEN_ALL) == 0) {
1774 + /* Flush all bindings of all sets*/
1775 + WRITE_LOCK(&ip_set_lock);
1776 + FOREACH_HASH_RW_DO(__set_hash_del);
1777 + WRITE_UNLOCK(&ip_set_lock);
1778 + return 0;
1779 + }
1780 + DP("unreachable reached!");
1781 + return -EINVAL;
1782 + }
1783 +
1784 + set = ip_set_list[index];
1785 + IP_SET_ASSERT(set);
1786 + if (strcmp(req_bind->binding, IPSET_TOKEN_DEFAULT) == 0) {
1787 + /* Default binding of set */
1788 + ip_set_id_t binding = ip_set_find_byindex(set->binding);
1789 +
1790 + if (binding == IP_SET_INVALID_ID)
1791 + return -ENOENT;
1792 +
1793 + WRITE_LOCK(&ip_set_lock);
1794 + /* Sets in hash values are referenced */
1795 + __ip_set_put(set->binding);
1796 + set->binding = IP_SET_INVALID_ID;
1797 + WRITE_UNLOCK(&ip_set_lock);
1798 +
1799 + return 0;
1800 + } else if (strcmp(req_bind->binding, IPSET_TOKEN_ALL) == 0) {
1801 + /* Flush all bindings */
1802 +
1803 + WRITE_LOCK(&ip_set_lock);
1804 + FOREACH_HASH_RW_DO(__set_hash_del_byid, set->id);
1805 + WRITE_UNLOCK(&ip_set_lock);
1806 + return 0;
1807 + }
1808 +
1809 + res = __ip_set_testip(set,
1810 + data + sizeof(struct ip_set_req_bind),
1811 + size - sizeof(struct ip_set_req_bind),
1812 + &ip);
1813 +
1814 + DP("set %s, ip: %u.%u.%u.%u", set->name, HIPQUAD(ip));
1815 + if (res >= 0)
1816 + res = ip_set_hash_del(set->id, ip);
1817 +
1818 + return res;
1819 +}
1820 +
1821 +static int
1822 +ip_set_testbind(ip_set_id_t index,
1823 + const void *data,
1824 + size_t size)
1825 +{
1826 + struct ip_set *set = ip_set_list[index];
1827 + struct ip_set_req_bind *req_bind;
1828 + ip_set_id_t binding;
1829 + ip_set_ip_t ip;
1830 + int res;
1831 +
1832 + IP_SET_ASSERT(set);
1833 + if (size < sizeof(struct ip_set_req_bind))
1834 + return -EINVAL;
1835 +
1836 + req_bind = (struct ip_set_req_bind *) data;
1837 + req_bind->binding[IP_SET_MAXNAMELEN - 1] = '\0';
1838 +
1839 + if (strcmp(req_bind->binding, IPSET_TOKEN_DEFAULT) == 0) {
1840 + /* Default binding of set */
1841 + char *binding_name;
1842 +
1843 + if (size != sizeof(struct ip_set_req_bind) + IP_SET_MAXNAMELEN)
1844 + return -EINVAL;
1845 +
1846 + binding_name = (char *)(data + sizeof(struct ip_set_req_bind));
1847 + binding_name[IP_SET_MAXNAMELEN - 1] = '\0';
1848 +
1849 + binding = ip_set_find_byname(binding_name);
1850 + if (binding == IP_SET_INVALID_ID)
1851 + return -ENOENT;
1852 +
1853 + res = (set->binding == binding) ? -EEXIST : 0;
1854 +
1855 + return res;
1856 + }
1857 + binding = ip_set_find_byname(req_bind->binding);
1858 + if (binding == IP_SET_INVALID_ID)
1859 + return -ENOENT;
1860 +
1861 +
1862 + res = __ip_set_testip(set,
1863 + data + sizeof(struct ip_set_req_bind),
1864 + size - sizeof(struct ip_set_req_bind),
1865 + &ip);
1866 + DP("set %s, ip: %u.%u.%u.%u, binding %s",
1867 + set->name, HIPQUAD(ip), ip_set_list[binding]->name);
1868 +
1869 + if (res >= 0)
1870 + res = (ip_set_find_in_hash(set->id, ip) == binding)
1871 + ? -EEXIST : 0;
1872 +
1873 + return res;
1874 +}
1875 +
1876 +static struct ip_set_type *
1877 +find_set_type_rlock(const char *typename)
1878 +{
1879 + struct ip_set_type *type;
1880 +
1881 + READ_LOCK(&ip_set_lock);
1882 + type = find_set_type(typename);
1883 + if (type == NULL)
1884 + READ_UNLOCK(&ip_set_lock);
1885 +
1886 + return type;
1887 +}
1888 +
1889 +static int
1890 +find_free_id(const char *name,
1891 + ip_set_id_t *index,
1892 + ip_set_id_t *id)
1893 +{
1894 + ip_set_id_t i;
1895 +
1896 + *id = IP_SET_INVALID_ID;
1897 + for (i = 0; i < ip_set_max; i++) {
1898 + if (ip_set_list[i] == NULL) {
1899 + if (*id == IP_SET_INVALID_ID)
1900 + *id = *index = i;
1901 + } else if (strcmp(name, ip_set_list[i]->name) == 0)
1902 + /* Name clash */
1903 + return -EEXIST;
1904 + }
1905 + if (*id == IP_SET_INVALID_ID)
1906 + /* No free slot remained */
1907 + return -ERANGE;
1908 + /* Check that index is usable as id (swapping) */
1909 + check:
1910 + for (i = 0; i < ip_set_max; i++) {
1911 + if (ip_set_list[i] != NULL
1912 + && ip_set_list[i]->id == *id) {
1913 + *id = i;
1914 + goto check;
1915 + }
1916 + }
1917 + return 0;
1918 +}
1919 +
1920 +/*
1921 + * Create a set
1922 + */
1923 +static int
1924 +ip_set_create(const char *name,
1925 + const char *typename,
1926 + ip_set_id_t restore,
1927 + const void *data,
1928 + size_t size)
1929 +{
1930 + struct ip_set *set;
1931 + ip_set_id_t index, id;
1932 + int res = 0;
1933 +
1934 + DP("setname: %s, typename: %s, id: %u", name, typename, restore);
1935 + /*
1936 + * First, and without any locks, allocate and initialize
1937 + * a normal base set structure.
1938 + */
1939 + set = kmalloc(sizeof(struct ip_set), GFP_KERNEL);
1940 + if (!set)
1941 + return -ENOMEM;
1942 + set->lock = RW_LOCK_UNLOCKED;
1943 + strncpy(set->name, name, IP_SET_MAXNAMELEN);
1944 + set->binding = IP_SET_INVALID_ID;
1945 + atomic_set(&set->ref, 0);
1946 +
1947 + /*
1948 + * Next, take the &ip_set_lock, check that we know the type,
1949 + * and take a reference on the type, to make sure it
1950 + * stays available while constructing our new set.
1951 + *
1952 + * After referencing the type, we drop the &ip_set_lock,
1953 + * and let the new set construction run without locks.
1954 + */
1955 + set->type = find_set_type_rlock(typename);
1956 + if (set->type == NULL) {
1957 + /* Try loading the module */
1958 + char modulename[IP_SET_MAXNAMELEN + strlen("ip_set_") + 1];
1959 + strcpy(modulename, "ip_set_");
1960 + strcat(modulename, typename);
1961 + DP("try to load %s", modulename);
1962 + request_module(modulename);
1963 + set->type = find_set_type_rlock(typename);
1964 + }
1965 + if (set->type == NULL) {
1966 + ip_set_printk("no set type '%s', set '%s' not created",
1967 + typename, name);
1968 + kfree(set);
1969 + return -ENOENT;
1970 + }
1971 + __MOD_INC(set->type->me);
1972 + READ_UNLOCK(&ip_set_lock);
1973 +
1974 + /*
1975 + * Without holding any locks, create private part.
1976 + */
1977 + res = set->type->create(set, data, size);
1978 + if (res != 0) {
1979 + __MOD_DEC(set->type->me);
1980 + kfree(set);
1981 + return res;
1982 + }
1983 +
1984 + /* BTW, res==0 here. */
1985 +
1986 + /*
1987 + * Here, we have a valid, constructed set. &ip_set_lock again,
1988 + * find free id/index and check that it is not already in
1989 + * ip_set_list.
1990 + */
1991 + WRITE_LOCK(&ip_set_lock);
1992 + if ((res = find_free_id(set->name, &index, &id)) != 0) {
1993 + DP("no free id!");
1994 + goto cleanup;
1995 + }
1996 +
1997 + /* Make sure restore gets the same index */
1998 + if (restore != IP_SET_INVALID_ID && index != restore) {
1999 + DP("Can't restore, sets are screwed up");
2000 + res = -ERANGE;
2001 + goto cleanup;
2002 + }
2003 +
2004 + /*
2005 + * Finally! Add our shiny new set to the list, and be done.
2006 + */
2007 + DP("create: '%s' created with index %u, id %u!", set->name, index, id);
2008 + set->id = id;
2009 + ip_set_list[index] = set;
2010 + WRITE_UNLOCK(&ip_set_lock);
2011 + return res;
2012 +
2013 + cleanup:
2014 + WRITE_UNLOCK(&ip_set_lock);
2015 + set->type->destroy(set);
2016 + __MOD_DEC(set->type->me);
2017 + kfree(set);
2018 + return res;
2019 +}
2020 +
2021 +/*
2022 + * Destroy a given existing set
2023 + */
2024 +static void
2025 +ip_set_destroy_set(ip_set_id_t index)
2026 +{
2027 + struct ip_set *set = ip_set_list[index];
2028 +
2029 + IP_SET_ASSERT(set);
2030 + DP("set: %s", set->name);
2031 + WRITE_LOCK(&ip_set_lock);
2032 + FOREACH_HASH_RW_DO(__set_hash_del_byid, set->id);
2033 + if (set->binding != IP_SET_INVALID_ID)
2034 + __ip_set_put(set->binding);
2035 + ip_set_list[index] = NULL;
2036 + WRITE_UNLOCK(&ip_set_lock);
2037 +
2038 + /* Must call it without holding any lock */
2039 + set->type->destroy(set);
2040 + __MOD_DEC(set->type->me);
2041 + kfree(set);
2042 +}
2043 +
2044 +/*
2045 + * Destroy a set - or all sets
2046 + * Sets must not be referenced/used.
2047 + */
2048 +static int
2049 +ip_set_destroy(ip_set_id_t index)
2050 +{
2051 + ip_set_id_t i;
2052 +
2053 + /* ref modification always protected by the mutex */
2054 + if (index != IP_SET_INVALID_ID) {
2055 + if (atomic_read(&ip_set_list[index]->ref))
2056 + return -EBUSY;
2057 + ip_set_destroy_set(index);
2058 + } else {
2059 + for (i = 0; i < ip_set_max; i++) {
2060 + if (ip_set_list[i] != NULL
2061 + && (atomic_read(&ip_set_list[i]->ref)))
2062 + return -EBUSY;
2063 + }
2064 +
2065 + for (i = 0; i < ip_set_max; i++) {
2066 + if (ip_set_list[i] != NULL)
2067 + ip_set_destroy_set(i);
2068 + }
2069 + }
2070 + return 0;
2071 +}
2072 +
2073 +static void
2074 +ip_set_flush_set(struct ip_set *set)
2075 +{
2076 + DP("set: %s %u", set->name, set->id);
2077 +
2078 + write_lock_bh(&set->lock);
2079 + set->type->flush(set);
2080 + write_unlock_bh(&set->lock);
2081 +}
2082 +
2083 +/*
2084 + * Flush data in a set - or in all sets
2085 + */
2086 +static int
2087 +ip_set_flush(ip_set_id_t index)
2088 +{
2089 + if (index != IP_SET_INVALID_ID) {
2090 + IP_SET_ASSERT(ip_set_list[index]);
2091 + ip_set_flush_set(ip_set_list[index]);
2092 + } else
2093 + FOREACH_SET_DO(ip_set_flush_set);
2094 +
2095 + return 0;
2096 +}
2097 +
2098 +/* Rename a set */
2099 +static int
2100 +ip_set_rename(ip_set_id_t index, const char *name)
2101 +{
2102 + struct ip_set *set = ip_set_list[index];
2103 + ip_set_id_t i;
2104 + int res = 0;
2105 +
2106 + DP("set: %s to %s", set->name, name);
2107 + WRITE_LOCK(&ip_set_lock);
2108 + for (i = 0; i < ip_set_max; i++) {
2109 + if (ip_set_list[i] != NULL
2110 + && strncmp(ip_set_list[i]->name,
2111 + name,
2112 + IP_SET_MAXNAMELEN - 1) == 0) {
2113 + res = -EEXIST;
2114 + goto unlock;
2115 + }
2116 + }
2117 + strncpy(set->name, name, IP_SET_MAXNAMELEN);
2118 + unlock:
2119 + WRITE_UNLOCK(&ip_set_lock);
2120 + return res;
2121 +}
2122 +
2123 +/*
2124 + * Swap two sets so that name/index points to the other.
2125 + * References are also swapped.
2126 + */
2127 +static int
2128 +ip_set_swap(ip_set_id_t from_index, ip_set_id_t to_index)
2129 +{
2130 + struct ip_set *from = ip_set_list[from_index];
2131 + struct ip_set *to = ip_set_list[to_index];
2132 + char from_name[IP_SET_MAXNAMELEN];
2133 + u_int32_t from_ref;
2134 +
2135 + DP("set: %s to %s", from->name, to->name);
2136 + /* Type can't be changed. Artifical restriction. */
2137 + if (from->type->typecode != to->type->typecode)
2138 + return -ENOEXEC;
2139 +
2140 + /* No magic here: ref munging protected by the mutex */
2141 + WRITE_LOCK(&ip_set_lock);
2142 + strncpy(from_name, from->name, IP_SET_MAXNAMELEN);
2143 + from_ref = atomic_read(&from->ref);
2144 +
2145 + strncpy(from->name, to->name, IP_SET_MAXNAMELEN);
2146 + atomic_set(&from->ref, atomic_read(&to->ref));
2147 + strncpy(to->name, from_name, IP_SET_MAXNAMELEN);
2148 + atomic_set(&to->ref, from_ref);
2149 +
2150 + ip_set_list[from_index] = to;
2151 + ip_set_list[to_index] = from;
2152 +
2153 + WRITE_UNLOCK(&ip_set_lock);
2154 + return 0;
2155 +}
2156 +
2157 +/*
2158 + * List set data
2159 + */
2160 +
2161 +static inline void
2162 +__set_hash_bindings_size_list(struct ip_set_hash *set_hash,
2163 + ip_set_id_t id, size_t *size)
2164 +{
2165 + if (set_hash->id == id)
2166 + *size += sizeof(struct ip_set_hash_list);
2167 +}
2168 +
2169 +static inline void
2170 +__set_hash_bindings_size_save(struct ip_set_hash *set_hash,
2171 + ip_set_id_t id, size_t *size)
2172 +{
2173 + if (set_hash->id == id)
2174 + *size += sizeof(struct ip_set_hash_save);
2175 +}
2176 +
2177 +static inline void
2178 +__set_hash_bindings(struct ip_set_hash *set_hash,
2179 + ip_set_id_t id, void *data, int *used)
2180 +{
2181 + if (set_hash->id == id) {
2182 + struct ip_set_hash_list *hash_list =
2183 + (struct ip_set_hash_list *)(data + *used);
2184 +
2185 + hash_list->ip = set_hash->ip;
2186 + hash_list->binding = set_hash->binding;
2187 + *used += sizeof(struct ip_set_hash_list);
2188 + }
2189 +}
2190 +
2191 +static int ip_set_list_set(ip_set_id_t index,
2192 + void *data,
2193 + int *used,
2194 + int len)
2195 +{
2196 + struct ip_set *set = ip_set_list[index];
2197 + struct ip_set_list *set_list;
2198 +
2199 + /* Pointer to our header */
2200 + set_list = (struct ip_set_list *) (data + *used);
2201 +
2202 + DP("set: %s, used: %d %p %p", set->name, *used, data, data + *used);
2203 +
2204 + /* Get and ensure header size */
2205 + if (*used + sizeof(struct ip_set_list) > len)
2206 + goto not_enough_mem;
2207 + *used += sizeof(struct ip_set_list);
2208 +
2209 + read_lock_bh(&set->lock);
2210 + /* Get and ensure set specific header size */
2211 + set_list->header_size = set->type->header_size;
2212 + if (*used + set_list->header_size > len)
2213 + goto unlock_set;
2214 +
2215 + /* Fill in the header */
2216 + set_list->index = index;
2217 + set_list->binding = set->binding;
2218 + set_list->ref = atomic_read(&set->ref);
2219 +
2220 + /* Fill in set spefific header data */
2221 + DP("call list_header");
2222 + set->type->list_header(set, data + *used);
2223 + DP("call list_header, done");
2224 + *used += set_list->header_size;
2225 +
2226 + /* Get and ensure set specific members size */
2227 + DP("call list_members_size");
2228 + set_list->members_size = set->type->list_members_size(set);
2229 + DP("call list_members_size, done");
2230 + if (*used + set_list->members_size > len)
2231 + goto unlock_set;
2232 +
2233 + /* Fill in set spefific members data */
2234 + DP("call list_members");
2235 + set->type->list_members(set, data + *used);
2236 + DP("call list_members, done");
2237 + *used += set_list->members_size;
2238 + read_unlock_bh(&set->lock);
2239 +
2240 + /* Bindings */
2241 +
2242 + /* Get and ensure set specific bindings size */
2243 + set_list->bindings_size = 0;
2244 + FOREACH_HASH_DO(__set_hash_bindings_size_list,
2245 + set->id, &set_list->bindings_size);
2246 + if (*used + set_list->bindings_size > len)
2247 + goto not_enough_mem;
2248 +
2249 + /* Fill in set spefific bindings data */
2250 + FOREACH_HASH_DO(__set_hash_bindings, set->id, data, used);
2251 +
2252 + return 0;
2253 +
2254 + unlock_set:
2255 + read_unlock_bh(&set->lock);
2256 + not_enough_mem:
2257 + DP("not enough mem, try again");
2258 + return -EAGAIN;
2259 +}
2260 +
2261 +/*
2262 + * Save sets
2263 + */
2264 +static int ip_set_save_set(ip_set_id_t index,
2265 + void *data,
2266 + int *used,
2267 + int len)
2268 +{
2269 + struct ip_set *set;
2270 + struct ip_set_save *set_save;
2271 +
2272 + /* Pointer to our header */
2273 + set_save = (struct ip_set_save *) (data + *used);
2274 +
2275 + /* Get and ensure header size */
2276 + if (*used + sizeof(struct ip_set_save) > len)
2277 + goto not_enough_mem;
2278 + *used += sizeof(struct ip_set_save);
2279 +
2280 + set = ip_set_list[index];
2281 + DP("set: %s, used: %u(%u) %p %p", set->name, *used, len,
2282 + data, data + *used);
2283 +
2284 + read_lock_bh(&set->lock);
2285 + /* Get and ensure set specific header size */
2286 + set_save->header_size = set->type->header_size;
2287 + if (*used + set_save->header_size > len)
2288 + goto unlock_set;
2289 +
2290 + /* Fill in the header */
2291 + set_save->index = index;
2292 + set_save->binding = set->binding;
2293 +
2294 + /* Fill in set spefific header data */
2295 + set->type->list_header(set, data + *used);
2296 + *used += set_save->header_size;
2297 +
2298 + DP("set header filled: %s, used: %u %p %p", set->name, *used,
2299 + data, data + *used);
2300 + /* Get and ensure set specific members size */
2301 + set_save->members_size = set->type->list_members_size(set);
2302 + if (*used + set_save->members_size > len)
2303 + goto unlock_set;
2304 +
2305 + /* Fill in set spefific members data */
2306 + set->type->list_members(set, data + *used);
2307 + *used += set_save->members_size;
2308 + read_unlock_bh(&set->lock);
2309 + DP("set members filled: %s, used: %u %p %p", set->name, *used,
2310 + data, data + *used);
2311 + return 0;
2312 +
2313 + unlock_set:
2314 + read_unlock_bh(&set->lock);
2315 + not_enough_mem:
2316 + DP("not enough mem, try again");
2317 + return -EAGAIN;
2318 +}
2319 +
2320 +static inline void
2321 +__set_hash_save_bindings(struct ip_set_hash *set_hash,
2322 + ip_set_id_t id,
2323 + void *data,
2324 + int *used,
2325 + int len,
2326 + int *res)
2327 +{
2328 + if (*res == 0
2329 + && (id == IP_SET_INVALID_ID || set_hash->id == id)) {
2330 + struct ip_set_hash_save *hash_save =
2331 + (struct ip_set_hash_save *)(data + *used);
2332 + /* Ensure bindings size */
2333 + if (*used + sizeof(struct ip_set_hash_save) > len) {
2334 + *res = -ENOMEM;
2335 + return;
2336 + }
2337 + hash_save->id = set_hash->id;
2338 + hash_save->ip = set_hash->ip;
2339 + hash_save->binding = set_hash->binding;
2340 + *used += sizeof(struct ip_set_hash_save);
2341 + }
2342 +}
2343 +
2344 +static int ip_set_save_bindings(ip_set_id_t index,
2345 + void *data,
2346 + int *used,
2347 + int len)
2348 +{
2349 + int res = 0;
2350 + struct ip_set_save *set_save;
2351 +
2352 + DP("used %u, len %u", *used, len);
2353 + /* Get and ensure header size */
2354 + if (*used + sizeof(struct ip_set_save) > len)
2355 + return -ENOMEM;
2356 +
2357 + /* Marker */
2358 + set_save = (struct ip_set_save *) (data + *used);
2359 + set_save->index = IP_SET_INVALID_ID;
2360 + *used += sizeof(struct ip_set_save);
2361 +
2362 + DP("marker added used %u, len %u", *used, len);
2363 + /* Fill in bindings data */
2364 + if (index != IP_SET_INVALID_ID)
2365 + /* Sets are identified by id in hash */
2366 + index = ip_set_list[index]->id;
2367 + FOREACH_HASH_DO(__set_hash_save_bindings, index, data, used, len, &res);
2368 +
2369 + return res;
2370 +}
2371 +
2372 +/*
2373 + * Restore sets
2374 + */
2375 +static int ip_set_restore(void *data,
2376 + int len)
2377 +{
2378 + int res = 0;
2379 + int line = 0, used = 0, members_size;
2380 + struct ip_set *set;
2381 + struct ip_set_hash_save *hash_save;
2382 + struct ip_set_restore *set_restore;
2383 + ip_set_id_t index;
2384 +
2385 + /* Loop to restore sets */
2386 + while (1) {
2387 + line++;
2388 +
2389 + DP("%u %u %u", used, sizeof(struct ip_set_restore), len);
2390 + /* Get and ensure header size */
2391 + if (used + sizeof(struct ip_set_restore) > len)
2392 + return line;
2393 + set_restore = (struct ip_set_restore *) (data + used);
2394 + used += sizeof(struct ip_set_restore);
2395 +
2396 + /* Ensure data size */
2397 + if (used
2398 + + set_restore->header_size
2399 + + set_restore->members_size > len)
2400 + return line;
2401 +
2402 + /* Check marker */
2403 + if (set_restore->index == IP_SET_INVALID_ID) {
2404 + line--;
2405 + goto bindings;
2406 + }
2407 +
2408 + /* Try to create the set */
2409 + DP("restore %s %s", set_restore->name, set_restore->typename);
2410 + res = ip_set_create(set_restore->name,
2411 + set_restore->typename,
2412 + set_restore->index,
2413 + data + used,
2414 + set_restore->header_size);
2415 +
2416 + if (res != 0)
2417 + return line;
2418 + used += set_restore->header_size;
2419 +
2420 + index = ip_set_find_byindex(set_restore->index);
2421 + DP("index %u, restore_index %u", index, set_restore->index);
2422 + if (index != set_restore->index)
2423 + return line;
2424 + /* Try to restore members data */
2425 + set = ip_set_list[index];
2426 + members_size = 0;
2427 + DP("members_size %u reqsize %u",
2428 + set_restore->members_size, set->type->reqsize);
2429 + while (members_size + set->type->reqsize <=
2430 + set_restore->members_size) {
2431 + line++;
2432 + DP("members: %u, line %u", members_size, line);
2433 + res = __ip_set_addip(index,
2434 + data + used + members_size,
2435 + set->type->reqsize);
2436 + if (!(res == 0 || res == -EEXIST))
2437 + return line;
2438 + members_size += set->type->reqsize;
2439 + }
2440 +
2441 + DP("members_size %u %u",
2442 + set_restore->members_size, members_size);
2443 + if (members_size != set_restore->members_size)
2444 + return line++;
2445 + used += set_restore->members_size;
2446 + }
2447 +
2448 + bindings:
2449 + /* Loop to restore bindings */
2450 + while (used < len) {
2451 + line++;
2452 +
2453 + DP("restore binding, line %u", line);
2454 + /* Get and ensure size */
2455 + if (used + sizeof(struct ip_set_hash_save) > len)
2456 + return line;
2457 + hash_save = (struct ip_set_hash_save *) (data + used);
2458 + used += sizeof(struct ip_set_hash_save);
2459 +
2460 + /* hash_save->id is used to store the index */
2461 + index = ip_set_find_byindex(hash_save->id);
2462 + DP("restore binding index %u, id %u, %u -> %u",
2463 + index, hash_save->id, hash_save->ip, hash_save->binding);
2464 + if (index != hash_save->id)
2465 + return line;
2466 +
2467 + set = ip_set_list[hash_save->id];
2468 + /* Null valued IP means default binding */
2469 + if (hash_save->ip)
2470 + res = ip_set_hash_add(set->id,
2471 + hash_save->ip,
2472 + hash_save->binding);
2473 + else {
2474 + IP_SET_ASSERT(set->binding == IP_SET_INVALID_ID);
2475 + WRITE_LOCK(&ip_set_lock);
2476 + set->binding = hash_save->binding;
2477 + __ip_set_get(set->binding);
2478 + WRITE_UNLOCK(&ip_set_lock);
2479 + DP("default binding: %u", set->binding);
2480 + }
2481 + if (res != 0)
2482 + return line;
2483 + }
2484 + if (used != len)
2485 + return line;
2486 +
2487 + return 0;
2488 +}
2489 +
2490 +static int
2491 +ip_set_sockfn_set(struct sock *sk, int optval, void *user, unsigned int len)
2492 +{
2493 + void *data;
2494 + int res = 0; /* Assume OK */
2495 + unsigned *op;
2496 + struct ip_set_req_adt *req_adt;
2497 + ip_set_id_t index = IP_SET_INVALID_ID;
2498 + int (*adtfn)(ip_set_id_t index,
2499 + const void *data, size_t size);
2500 + struct fn_table {
2501 + int (*fn)(ip_set_id_t index,
2502 + const void *data, size_t size);
2503 + } adtfn_table[] =
2504 + { { ip_set_addip }, { ip_set_delip }, { ip_set_testip},
2505 + { ip_set_bindip}, { ip_set_unbindip }, { ip_set_testbind },
2506 + };
2507 +
2508 + DP("optval=%d, user=%p, len=%d", optval, user, len);
2509 + if (!capable(CAP_NET_ADMIN))
2510 + return -EPERM;
2511 + if (optval != SO_IP_SET)
2512 + return -EBADF;
2513 + if (len <= sizeof(unsigned)) {
2514 + ip_set_printk("short userdata (want >%zu, got %u)",
2515 + sizeof(unsigned), len);
2516 + return -EINVAL;
2517 + }
2518 + data = vmalloc(len);
2519 + if (!data) {
2520 + DP("out of mem for %u bytes", len);
2521 + return -ENOMEM;
2522 + }
2523 + if (copy_from_user(data, user, len) != 0) {
2524 + res = -EFAULT;
2525 + goto done;
2526 + }
2527 + if (down_interruptible(&ip_set_app_mutex)) {
2528 + res = -EINTR;
2529 + goto done;
2530 + }
2531 +
2532 + op = (unsigned *)data;
2533 + DP("op=%x", *op);
2534 +
2535 + if (*op < IP_SET_OP_VERSION) {
2536 + /* Check the version at the beginning of operations */
2537 + struct ip_set_req_version *req_version =
2538 + (struct ip_set_req_version *) data;
2539 + if (req_version->version != IP_SET_PROTOCOL_VERSION) {
2540 + res = -EPROTO;
2541 + goto done;
2542 + }
2543 + }
2544 +
2545 + switch (*op) {
2546 + case IP_SET_OP_CREATE:{
2547 + struct ip_set_req_create *req_create
2548 + = (struct ip_set_req_create *) data;
2549 +
2550 + if (len <= sizeof(struct ip_set_req_create)) {
2551 + ip_set_printk("short CREATE data (want >%zu, got %u)",
2552 + sizeof(struct ip_set_req_create), len);
2553 + res = -EINVAL;
2554 + goto done;
2555 + }
2556 + req_create->name[IP_SET_MAXNAMELEN - 1] = '\0';
2557 + req_create->typename[IP_SET_MAXNAMELEN - 1] = '\0';
2558 + res = ip_set_create(req_create->name,
2559 + req_create->typename,
2560 + IP_SET_INVALID_ID,
2561 + data + sizeof(struct ip_set_req_create),
2562 + len - sizeof(struct ip_set_req_create));
2563 + goto done;
2564 + }
2565 + case IP_SET_OP_DESTROY:{
2566 + struct ip_set_req_std *req_destroy
2567 + = (struct ip_set_req_std *) data;
2568 +
2569 + if (len != sizeof(struct ip_set_req_std)) {
2570 + ip_set_printk("invalid DESTROY data (want %zu, got %u)",
2571 + sizeof(struct ip_set_req_std), len);
2572 + res = -EINVAL;
2573 + goto done;
2574 + }
2575 + if (strcmp(req_destroy->name, IPSET_TOKEN_ALL) == 0) {
2576 + /* Destroy all sets */
2577 + index = IP_SET_INVALID_ID;
2578 + } else {
2579 + req_destroy->name[IP_SET_MAXNAMELEN - 1] = '\0';
2580 + index = ip_set_find_byname(req_destroy->name);
2581 +
2582 + if (index == IP_SET_INVALID_ID) {
2583 + res = -ENOENT;
2584 + goto done;
2585 + }
2586 + }
2587 +
2588 + res = ip_set_destroy(index);
2589 + goto done;
2590 + }
2591 + case IP_SET_OP_FLUSH:{
2592 + struct ip_set_req_std *req_flush =
2593 + (struct ip_set_req_std *) data;
2594 +
2595 + if (len != sizeof(struct ip_set_req_std)) {
2596 + ip_set_printk("invalid FLUSH data (want %zu, got %u)",
2597 + sizeof(struct ip_set_req_std), len);
2598 + res = -EINVAL;
2599 + goto done;
2600 + }
2601 + if (strcmp(req_flush->name, IPSET_TOKEN_ALL) == 0) {
2602 + /* Flush all sets */
2603 + index = IP_SET_INVALID_ID;
2604 + } else {
2605 + req_flush->name[IP_SET_MAXNAMELEN - 1] = '\0';
2606 + index = ip_set_find_byname(req_flush->name);
2607 +
2608 + if (index == IP_SET_INVALID_ID) {
2609 + res = -ENOENT;
2610 + goto done;
2611 + }
2612 + }
2613 + res = ip_set_flush(index);
2614 + goto done;
2615 + }
2616 + case IP_SET_OP_RENAME:{
2617 + struct ip_set_req_create *req_rename
2618 + = (struct ip_set_req_create *) data;
2619 +
2620 + if (len != sizeof(struct ip_set_req_create)) {
2621 + ip_set_printk("invalid RENAME data (want %zu, got %u)",
2622 + sizeof(struct ip_set_req_create), len);
2623 + res = -EINVAL;
2624 + goto done;
2625 + }
2626 +
2627 + req_rename->name[IP_SET_MAXNAMELEN - 1] = '\0';
2628 + req_rename->typename[IP_SET_MAXNAMELEN - 1] = '\0';
2629 +
2630 + index = ip_set_find_byname(req_rename->name);
2631 + if (index == IP_SET_INVALID_ID) {
2632 + res = -ENOENT;
2633 + goto done;
2634 + }
2635 + res = ip_set_rename(index, req_rename->typename);
2636 + goto done;
2637 + }
2638 + case IP_SET_OP_SWAP:{
2639 + struct ip_set_req_create *req_swap
2640 + = (struct ip_set_req_create *) data;
2641 + ip_set_id_t to_index;
2642 +
2643 + if (len != sizeof(struct ip_set_req_create)) {
2644 + ip_set_printk("invalid SWAP data (want %zu, got %u)",
2645 + sizeof(struct ip_set_req_create), len);
2646 + res = -EINVAL;
2647 + goto done;
2648 + }
2649 +
2650 + req_swap->name[IP_SET_MAXNAMELEN - 1] = '\0';
2651 + req_swap->typename[IP_SET_MAXNAMELEN - 1] = '\0';
2652 +
2653 + index = ip_set_find_byname(req_swap->name);
2654 + if (index == IP_SET_INVALID_ID) {
2655 + res = -ENOENT;
2656 + goto done;
2657 + }
2658 + to_index = ip_set_find_byname(req_swap->typename);
2659 + if (to_index == IP_SET_INVALID_ID) {
2660 + res = -ENOENT;
2661 + goto done;
2662 + }
2663 + res = ip_set_swap(index, to_index);
2664 + goto done;
2665 + }
2666 + default:
2667 + break; /* Set identified by id */
2668 + }
2669 +
2670 + /* There we may have add/del/test/bind/unbind/test_bind operations */
2671 + if (*op < IP_SET_OP_ADD_IP || *op > IP_SET_OP_TEST_BIND_SET) {
2672 + res = -EBADMSG;
2673 + goto done;
2674 + }
2675 + adtfn = adtfn_table[*op - IP_SET_OP_ADD_IP].fn;
2676 +
2677 + if (len < sizeof(struct ip_set_req_adt)) {
2678 + ip_set_printk("short data in adt request (want >=%zu, got %u)",
2679 + sizeof(struct ip_set_req_adt), len);
2680 + res = -EINVAL;
2681 + goto done;
2682 + }
2683 + req_adt = (struct ip_set_req_adt *) data;
2684 +
2685 + /* -U :all: :all:|:default: uses IP_SET_INVALID_ID */
2686 + if (!(*op == IP_SET_OP_UNBIND_SET
2687 + && req_adt->index == IP_SET_INVALID_ID)) {
2688 + index = ip_set_find_byindex(req_adt->index);
2689 + if (index == IP_SET_INVALID_ID) {
2690 + res = -ENOENT;
2691 + goto done;
2692 + }
2693 + }
2694 + res = adtfn(index, data, len);
2695 +
2696 + done:
2697 + up(&ip_set_app_mutex);
2698 + vfree(data);
2699 + if (res > 0)
2700 + res = 0;
2701 + DP("final result %d", res);
2702 + return res;
2703 +}
2704 +
2705 +static int
2706 +ip_set_sockfn_get(struct sock *sk, int optval, void *user, int *len)
2707 +{
2708 + int res = 0;
2709 + unsigned *op;
2710 + ip_set_id_t index = IP_SET_INVALID_ID;
2711 + void *data;
2712 + int copylen = *len;
2713 +
2714 + DP("optval=%d, user=%p, len=%d", optval, user, *len);
2715 + if (!capable(CAP_NET_ADMIN))
2716 + return -EPERM;
2717 + if (optval != SO_IP_SET)
2718 + return -EBADF;
2719 + if (*len < sizeof(unsigned)) {
2720 + ip_set_printk("short userdata (want >=%zu, got %d)",
2721 + sizeof(unsigned), *len);
2722 + return -EINVAL;
2723 + }
2724 + data = vmalloc(*len);
2725 + if (!data) {
2726 + DP("out of mem for %d bytes", *len);
2727 + return -ENOMEM;
2728 + }
2729 + if (copy_from_user(data, user, *len) != 0) {
2730 + res = -EFAULT;
2731 + goto done;
2732 + }
2733 + if (down_interruptible(&ip_set_app_mutex)) {
2734 + res = -EINTR;
2735 + goto done;
2736 + }
2737 +
2738 + op = (unsigned *) data;
2739 + DP("op=%x", *op);
2740 +
2741 + if (*op < IP_SET_OP_VERSION) {
2742 + /* Check the version at the beginning of operations */
2743 + struct ip_set_req_version *req_version =
2744 + (struct ip_set_req_version *) data;
2745 + if (req_version->version != IP_SET_PROTOCOL_VERSION) {
2746 + res = -EPROTO;
2747 + goto done;
2748 + }
2749 + }
2750 +
2751 + switch (*op) {
2752 + case IP_SET_OP_VERSION: {
2753 + struct ip_set_req_version *req_version =
2754 + (struct ip_set_req_version *) data;
2755 +
2756 + if (*len != sizeof(struct ip_set_req_version)) {
2757 + ip_set_printk("invalid VERSION (want %zu, got %d)",
2758 + sizeof(struct ip_set_req_version),
2759 + *len);
2760 + res = -EINVAL;
2761 + goto done;
2762 + }
2763 +
2764 + req_version->version = IP_SET_PROTOCOL_VERSION;
2765 + res = copy_to_user(user, req_version,
2766 + sizeof(struct ip_set_req_version));
2767 + goto done;
2768 + }
2769 + case IP_SET_OP_GET_BYNAME: {
2770 + struct ip_set_req_get_set *req_get
2771 + = (struct ip_set_req_get_set *) data;
2772 +
2773 + if (*len != sizeof(struct ip_set_req_get_set)) {
2774 + ip_set_printk("invalid GET_BYNAME (want %zu, got %d)",
2775 + sizeof(struct ip_set_req_get_set), *len);
2776 + res = -EINVAL;
2777 + goto done;
2778 + }
2779 + req_get->set.name[IP_SET_MAXNAMELEN - 1] = '\0';
2780 + index = ip_set_find_byname(req_get->set.name);
2781 + req_get->set.index = index;
2782 + goto copy;
2783 + }
2784 + case IP_SET_OP_GET_BYINDEX: {
2785 + struct ip_set_req_get_set *req_get
2786 + = (struct ip_set_req_get_set *) data;
2787 +
2788 + if (*len != sizeof(struct ip_set_req_get_set)) {
2789 + ip_set_printk("invalid GET_BYINDEX (want %zu, got %d)",
2790 + sizeof(struct ip_set_req_get_set), *len);
2791 + res = -EINVAL;
2792 + goto done;
2793 + }
2794 + req_get->set.name[IP_SET_MAXNAMELEN - 1] = '\0';
2795 + index = ip_set_find_byindex(req_get->set.index);
2796 + strncpy(req_get->set.name,
2797 + index == IP_SET_INVALID_ID ? ""
2798 + : ip_set_list[index]->name, IP_SET_MAXNAMELEN);
2799 + goto copy;
2800 + }
2801 + case IP_SET_OP_ADT_GET: {
2802 + struct ip_set_req_adt_get *req_get
2803 + = (struct ip_set_req_adt_get *) data;
2804 +
2805 + if (*len != sizeof(struct ip_set_req_adt_get)) {
2806 + ip_set_printk("invalid ADT_GET (want %zu, got %d)",
2807 + sizeof(struct ip_set_req_adt_get), *len);
2808 + res = -EINVAL;
2809 + goto done;
2810 + }
2811 + req_get->set.name[IP_SET_MAXNAMELEN - 1] = '\0';
2812 + index = ip_set_find_byname(req_get->set.name);
2813 + if (index != IP_SET_INVALID_ID) {
2814 + req_get->set.index = index;
2815 + strncpy(req_get->typename,
2816 + ip_set_list[index]->type->typename,
2817 + IP_SET_MAXNAMELEN - 1);
2818 + } else {
2819 + res = -ENOENT;
2820 + goto done;
2821 + }
2822 + goto copy;
2823 + }
2824 + case IP_SET_OP_MAX_SETS: {
2825 + struct ip_set_req_max_sets *req_max_sets
2826 + = (struct ip_set_req_max_sets *) data;
2827 + ip_set_id_t i;
2828 +
2829 + if (*len != sizeof(struct ip_set_req_max_sets)) {
2830 + ip_set_printk("invalid MAX_SETS (want %zu, got %d)",
2831 + sizeof(struct ip_set_req_max_sets), *len);
2832 + res = -EINVAL;
2833 + goto done;
2834 + }
2835 +
2836 + if (strcmp(req_max_sets->set.name, IPSET_TOKEN_ALL) == 0) {
2837 + req_max_sets->set.index = IP_SET_INVALID_ID;
2838 + } else {
2839 + req_max_sets->set.name[IP_SET_MAXNAMELEN - 1] = '\0';
2840 + req_max_sets->set.index =
2841 + ip_set_find_byname(req_max_sets->set.name);
2842 + if (req_max_sets->set.index == IP_SET_INVALID_ID) {
2843 + res = -ENOENT;
2844 + goto done;
2845 + }
2846 + }
2847 + req_max_sets->max_sets = ip_set_max;
2848 + req_max_sets->sets = 0;
2849 + for (i = 0; i < ip_set_max; i++) {
2850 + if (ip_set_list[i] != NULL)
2851 + req_max_sets->sets++;
2852 + }
2853 + goto copy;
2854 + }
2855 + case IP_SET_OP_LIST_SIZE:
2856 + case IP_SET_OP_SAVE_SIZE: {
2857 + struct ip_set_req_setnames *req_setnames
2858 + = (struct ip_set_req_setnames *) data;
2859 + struct ip_set_name_list *name_list;
2860 + struct ip_set *set;
2861 + ip_set_id_t i;
2862 + int used;
2863 +
2864 + if (*len < sizeof(struct ip_set_req_setnames)) {
2865 + ip_set_printk("short LIST_SIZE (want >=%zu, got %d)",
2866 + sizeof(struct ip_set_req_setnames), *len);
2867 + res = -EINVAL;
2868 + goto done;
2869 + }
2870 +
2871 + req_setnames->size = 0;
2872 + used = sizeof(struct ip_set_req_setnames);
2873 + for (i = 0; i < ip_set_max; i++) {
2874 + if (ip_set_list[i] == NULL)
2875 + continue;
2876 + name_list = (struct ip_set_name_list *)
2877 + (data + used);
2878 + used += sizeof(struct ip_set_name_list);
2879 + if (used > copylen) {
2880 + res = -EAGAIN;
2881 + goto done;
2882 + }
2883 + set = ip_set_list[i];
2884 + /* Fill in index, name, etc. */
2885 + name_list->index = i;
2886 + name_list->id = set->id;
2887 + strncpy(name_list->name,
2888 + set->name,
2889 + IP_SET_MAXNAMELEN - 1);
2890 + strncpy(name_list->typename,
2891 + set->type->typename,
2892 + IP_SET_MAXNAMELEN - 1);
2893 + DP("filled %s of type %s, index %u\n",
2894 + name_list->name, name_list->typename,
2895 + name_list->index);
2896 + if (!(req_setnames->index == IP_SET_INVALID_ID
2897 + || req_setnames->index == i))
2898 + continue;
2899 + /* Update size */
2900 + switch (*op) {
2901 + case IP_SET_OP_LIST_SIZE: {
2902 + req_setnames->size += sizeof(struct ip_set_list)
2903 + + set->type->header_size
2904 + + set->type->list_members_size(set);
2905 + FOREACH_HASH_DO(__set_hash_bindings_size_list,
2906 + i, &req_setnames->size);
2907 + break;
2908 + }
2909 + case IP_SET_OP_SAVE_SIZE: {
2910 + req_setnames->size += sizeof(struct ip_set_save)
2911 + + set->type->header_size
2912 + + set->type->list_members_size(set);
2913 + FOREACH_HASH_DO(__set_hash_bindings_size_save,
2914 + i, &req_setnames->size);
2915 + break;
2916 + }
2917 + default:
2918 + break;
2919 + }
2920 + }
2921 + if (copylen != used) {
2922 + res = -EAGAIN;
2923 + goto done;
2924 + }
2925 + goto copy;
2926 + }
2927 + case IP_SET_OP_LIST: {
2928 + struct ip_set_req_list *req_list
2929 + = (struct ip_set_req_list *) data;
2930 + ip_set_id_t i;
2931 + int used;
2932 +
2933 + if (*len < sizeof(struct ip_set_req_list)) {
2934 + ip_set_printk("short LIST (want >=%zu, got %d)",
2935 + sizeof(struct ip_set_req_list), *len);
2936 + res = -EINVAL;
2937 + goto done;
2938 + }
2939 + index = req_list->index;
2940 + if (index != IP_SET_INVALID_ID
2941 + && ip_set_find_byindex(index) != index) {
2942 + res = -ENOENT;
2943 + goto done;
2944 + }
2945 + used = 0;
2946 + if (index == IP_SET_INVALID_ID) {
2947 + /* List all sets */
2948 + for (i = 0; i < ip_set_max && res == 0; i++) {
2949 + if (ip_set_list[i] != NULL)
2950 + res = ip_set_list_set(i, data, &used, *len);
2951 + }
2952 + } else {
2953 + /* List an individual set */
2954 + res = ip_set_list_set(index, data, &used, *len);
2955 + }
2956 + if (res != 0)
2957 + goto done;
2958 + else if (copylen != used) {
2959 + res = -EAGAIN;
2960 + goto done;
2961 + }
2962 + goto copy;
2963 + }
2964 + case IP_SET_OP_SAVE: {
2965 + struct ip_set_req_list *req_save
2966 + = (struct ip_set_req_list *) data;
2967 + ip_set_id_t i;
2968 + int used;
2969 +
2970 + if (*len < sizeof(struct ip_set_req_list)) {
2971 + ip_set_printk("short SAVE (want >=%zu, got %d)",
2972 + sizeof(struct ip_set_req_list), *len);
2973 + res = -EINVAL;
2974 + goto done;
2975 + }
2976 + index = req_save->index;
2977 + if (index != IP_SET_INVALID_ID
2978 + && ip_set_find_byindex(index) != index) {
2979 + res = -ENOENT;
2980 + goto done;
2981 + }
2982 + used = 0;
2983 + if (index == IP_SET_INVALID_ID) {
2984 + /* Save all sets */
2985 + for (i = 0; i < ip_set_max && res == 0; i++) {
2986 + if (ip_set_list[i] != NULL)
2987 + res = ip_set_save_set(i, data, &used, *len);
2988 + }
2989 + } else {
2990 + /* Save an individual set */
2991 + res = ip_set_save_set(index, data, &used, *len);
2992 + }
2993 + if (res == 0)
2994 + res = ip_set_save_bindings(index, data, &used, *len);
2995 +
2996 + if (res != 0)
2997 + goto done;
2998 + else if (copylen != used) {
2999 + res = -EAGAIN;
3000 + goto done;
3001 + }
3002 + goto copy;
3003 + }
3004 + case IP_SET_OP_RESTORE: {
3005 + struct ip_set_req_setnames *req_restore
3006 + = (struct ip_set_req_setnames *) data;
3007 + int line;
3008 +
3009 + if (*len < sizeof(struct ip_set_req_setnames)
3010 + || *len != req_restore->size) {
3011 + ip_set_printk("invalid RESTORE (want =%zu, got %d)",
3012 + req_restore->size, *len);
3013 + res = -EINVAL;
3014 + goto done;
3015 + }
3016 + line = ip_set_restore(data + sizeof(struct ip_set_req_setnames),
3017 + req_restore->size - sizeof(struct ip_set_req_setnames));
3018 + DP("ip_set_restore: %u", line);
3019 + if (line != 0) {
3020 + res = -EAGAIN;
3021 + req_restore->size = line;
3022 + copylen = sizeof(struct ip_set_req_setnames);
3023 + goto copy;
3024 + }
3025 + goto done;
3026 + }
3027 + default:
3028 + res = -EBADMSG;
3029 + goto done;
3030 + } /* end of switch(op) */
3031 +
3032 + copy:
3033 + DP("set %s, copylen %u", index != IP_SET_INVALID_ID
3034 + && ip_set_list[index]
3035 + ? ip_set_list[index]->name
3036 + : ":all:", copylen);
3037 + if (res == 0)
3038 + res = copy_to_user(user, data, copylen);
3039 + else
3040 + copy_to_user(user, data, copylen);
3041 +
3042 + done:
3043 + up(&ip_set_app_mutex);
3044 + vfree(data);
3045 + if (res > 0)
3046 + res = 0;
3047 + DP("final result %d", res);
3048 + return res;
3049 +}
3050 +
3051 +static struct nf_sockopt_ops so_set = {
3052 + .pf = PF_INET,
3053 + .set_optmin = SO_IP_SET,
3054 + .set_optmax = SO_IP_SET + 1,
3055 + .set = &ip_set_sockfn_set,
3056 + .get_optmin = SO_IP_SET,
3057 + .get_optmax = SO_IP_SET + 1,
3058 + .get = &ip_set_sockfn_get,
3059 + .use = 0
3060 +};
3061 +
3062 +static int max_sets, hash_size;
3063 +MODULE_PARM(max_sets, "i");
3064 +MODULE_PARM_DESC(max_sets, "maximal number of sets");
3065 +MODULE_PARM(hash_size, "i");
3066 +MODULE_PARM_DESC(hash_size, "hash size for bindings");
3067 +MODULE_LICENSE("GPL");
3068 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
3069 +MODULE_DESCRIPTION("module implementing core IP set support");
3070 +
3071 +static int __init init(void)
3072 +{
3073 + int res;
3074 + ip_set_id_t i;
3075 +
3076 + get_random_bytes(&ip_set_hash_random, 4);
3077 + if (max_sets)
3078 + ip_set_max = max_sets;
3079 + ip_set_list = vmalloc(sizeof(struct ip_set *) * ip_set_max);
3080 + if (!ip_set_list) {
3081 + printk(KERN_ERR "Unable to create ip_set_list\n");
3082 + return -ENOMEM;
3083 + }
3084 + memset(ip_set_list, 0, sizeof(struct ip_set *) * ip_set_max);
3085 + if (hash_size)
3086 + ip_set_bindings_hash_size = hash_size;
3087 + ip_set_hash = vmalloc(sizeof(struct list_head) * ip_set_bindings_hash_size);
3088 + if (!ip_set_hash) {
3089 + printk(KERN_ERR "Unable to create ip_set_hash\n");
3090 + vfree(ip_set_list);
3091 + return -ENOMEM;
3092 + }
3093 + for (i = 0; i < ip_set_bindings_hash_size; i++)
3094 + INIT_LIST_HEAD(&ip_set_hash[i]);
3095 +
3096 + INIT_LIST_HEAD(&set_type_list);
3097 +
3098 + res = nf_register_sockopt(&so_set);
3099 + if (res != 0) {
3100 + ip_set_printk("SO_SET registry failed: %d", res);
3101 + vfree(ip_set_list);
3102 + vfree(ip_set_hash);
3103 + return res;
3104 + }
3105 + return 0;
3106 +}
3107 +
3108 +static void __exit fini(void)
3109 +{
3110 + /* There can't be any existing set or binding. Racy. */
3111 + nf_unregister_sockopt(&so_set);
3112 + vfree(ip_set_list);
3113 + vfree(ip_set_hash);
3114 + DP("these are the famous last words");
3115 +}
3116 +
3117 +EXPORT_SYMBOL(ip_set_register_set_type);
3118 +EXPORT_SYMBOL(ip_set_unregister_set_type);
3119 +
3120 +EXPORT_SYMBOL(ip_set_get_byname);
3121 +EXPORT_SYMBOL(ip_set_get_byindex);
3122 +EXPORT_SYMBOL(ip_set_put);
3123 +
3124 +EXPORT_SYMBOL(ip_set_addip_kernel);
3125 +EXPORT_SYMBOL(ip_set_delip_kernel);
3126 +EXPORT_SYMBOL(ip_set_testip_kernel);
3127 +
3128 +module_init(init);
3129 +module_exit(fini);
3130 Index: linux-2.4.35.4/net/ipv4/netfilter/ip_set_iphash.c
3131 ===================================================================
3132 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
3133 +++ linux-2.4.35.4/net/ipv4/netfilter/ip_set_iphash.c 2007-12-15 05:20:07.896290225 +0100
3134 @@ -0,0 +1,379 @@
3135 +/* Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
3136 + *
3137 + * This program is free software; you can redistribute it and/or modify
3138 + * it under the terms of the GNU General Public License version 2 as
3139 + * published by the Free Software Foundation.
3140 + */
3141 +
3142 +/* Kernel module implementing an ip hash set */
3143 +
3144 +#include <linux/module.h>
3145 +#include <linux/ip.h>
3146 +#include <linux/skbuff.h>
3147 +#include <linux/netfilter_ipv4/ip_tables.h>
3148 +#include <linux/netfilter_ipv4/ip_set.h>
3149 +#include <linux/errno.h>
3150 +#include <asm/uaccess.h>
3151 +#include <asm/bitops.h>
3152 +#include <asm/softirq.h>
3153 +#include <linux/spinlock.h>
3154 +#include <linux/vmalloc.h>
3155 +#include <linux/random.h>
3156 +
3157 +#include <net/ip.h>
3158 +
3159 +#include <linux/netfilter_ipv4/ip_set_malloc.h>
3160 +#include <linux/netfilter_ipv4/ip_set_iphash.h>
3161 +#include <linux/netfilter_ipv4/ip_set_jhash.h>
3162 +#include <linux/netfilter_ipv4/ip_set_prime.h>
3163 +
3164 +static inline __u32
3165 +jhash_ip(const struct ip_set_iphash *map, ip_set_ip_t ip)
3166 +{
3167 + return jhash_1word(ip, map->initval);
3168 +}
3169 +
3170 +static inline __u32
3171 +randhash_ip(const struct ip_set_iphash *map, ip_set_ip_t ip)
3172 +{
3173 + return (1 + ip % map->prime);
3174 +}
3175 +
3176 +static inline __u32
3177 +hash_id(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
3178 +{
3179 + struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
3180 + __u32 jhash, randhash, id;
3181 + u_int16_t i;
3182 +
3183 + *hash_ip = ip & map->netmask;
3184 + jhash = jhash_ip(map, *hash_ip);
3185 + randhash = randhash_ip(map, *hash_ip);
3186 + DP("set: %s, ip:%u.%u.%u.%u, %u.%u.%u.%u, %u.%u.%u.%u",
3187 + set->name, HIPQUAD(ip), HIPQUAD(*hash_ip), HIPQUAD(map->netmask));
3188 +
3189 + for (i = 0; i < map->probes; i++) {
3190 + id = (jhash + i * randhash) % map->hashsize;
3191 + DP("hash key: %u", id);
3192 + if (map->members[id] == *hash_ip)
3193 + return id;
3194 + /* No shortcut at testing - there can be deleted
3195 + * entries. */
3196 + }
3197 + return UINT_MAX;
3198 +}
3199 +
3200 +static inline int
3201 +__testip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
3202 +{
3203 + return (hash_id(set, ip, hash_ip) != UINT_MAX);
3204 +}
3205 +
3206 +static int
3207 +testip(struct ip_set *set, const void *data, size_t size,
3208 + ip_set_ip_t *hash_ip)
3209 +{
3210 + struct ip_set_req_iphash *req =
3211 + (struct ip_set_req_iphash *) data;
3212 +
3213 + if (size != sizeof(struct ip_set_req_iphash)) {
3214 + ip_set_printk("data length wrong (want %zu, have %zu)",
3215 + sizeof(struct ip_set_req_iphash),
3216 + size);
3217 + return -EINVAL;
3218 + }
3219 + return __testip(set, req->ip, hash_ip);
3220 +}
3221 +
3222 +static int
3223 +testip_kernel(struct ip_set *set, const struct sk_buff *skb,
3224 + u_int32_t flags, ip_set_ip_t *hash_ip)
3225 +{
3226 + return __testip(set,
3227 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
3228 + : skb->nh.iph->daddr),
3229 + hash_ip);
3230 +}
3231 +
3232 +static inline int
3233 +__addip(struct ip_set_iphash *map, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
3234 +{
3235 + __u32 jhash, randhash, probe;
3236 + u_int16_t i;
3237 +
3238 + *hash_ip = ip & map->netmask;
3239 + jhash = jhash_ip(map, *hash_ip);
3240 + randhash = randhash_ip(map, *hash_ip);
3241 +
3242 + for (i = 0; i < map->probes; i++) {
3243 + probe = (jhash + i * randhash) % map->hashsize;
3244 + if (map->members[probe] == *hash_ip)
3245 + return -EEXIST;
3246 + if (!map->members[probe]) {
3247 + map->members[probe] = *hash_ip;
3248 + return 0;
3249 + }
3250 + }
3251 + /* Trigger rehashing */
3252 + return -EAGAIN;
3253 +}
3254 +
3255 +static int
3256 +addip(struct ip_set *set, const void *data, size_t size,
3257 + ip_set_ip_t *hash_ip)
3258 +{
3259 + struct ip_set_req_iphash *req =
3260 + (struct ip_set_req_iphash *) data;
3261 +
3262 + if (size != sizeof(struct ip_set_req_iphash)) {
3263 + ip_set_printk("data length wrong (want %zu, have %zu)",
3264 + sizeof(struct ip_set_req_iphash),
3265 + size);
3266 + return -EINVAL;
3267 + }
3268 + return __addip((struct ip_set_iphash *) set->data, req->ip, hash_ip);
3269 +}
3270 +
3271 +static int
3272 +addip_kernel(struct ip_set *set, const struct sk_buff *skb,
3273 + u_int32_t flags, ip_set_ip_t *hash_ip)
3274 +{
3275 + return __addip((struct ip_set_iphash *) set->data,
3276 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
3277 + : skb->nh.iph->daddr),
3278 + hash_ip);
3279 +}
3280 +
3281 +static int retry(struct ip_set *set)
3282 +{
3283 + struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
3284 + ip_set_ip_t hash_ip, *members;
3285 + u_int32_t i, hashsize;
3286 + unsigned newbytes;
3287 + int res;
3288 + struct ip_set_iphash tmp = {
3289 + .hashsize = map->hashsize,
3290 + .probes = map->probes,
3291 + .resize = map->resize,
3292 + .netmask = map->netmask,
3293 + };
3294 +
3295 + if (map->resize == 0)
3296 + return -ERANGE;
3297 +
3298 + again:
3299 + res = 0;
3300 +
3301 + /* Calculate new parameters */
3302 + get_random_bytes(&tmp.initval, 4);
3303 + hashsize = tmp.hashsize + (tmp.hashsize * map->resize)/100;
3304 + if (hashsize == tmp.hashsize)
3305 + hashsize++;
3306 + tmp.prime = make_prime(hashsize);
3307 +
3308 + ip_set_printk("rehashing of set %s triggered: "
3309 + "hashsize grows from %u to %u",
3310 + set->name, tmp.hashsize, hashsize);
3311 + tmp.hashsize = hashsize;
3312 +
3313 + newbytes = hashsize * sizeof(ip_set_ip_t);
3314 + tmp.members = ip_set_malloc(newbytes);
3315 + if (!tmp.members) {
3316 + DP("out of memory for %d bytes", newbytes);
3317 + return -ENOMEM;
3318 + }
3319 + memset(tmp.members, 0, newbytes);
3320 +
3321 + write_lock_bh(&set->lock);
3322 + map = (struct ip_set_iphash *) set->data; /* Play safe */
3323 + for (i = 0; i < map->hashsize && res == 0; i++) {
3324 + if (map->members[i])
3325 + res = __addip(&tmp, map->members[i], &hash_ip);
3326 + }
3327 + if (res) {
3328 + /* Failure, try again */
3329 + write_unlock_bh(&set->lock);
3330 + ip_set_free(tmp.members, newbytes);
3331 + goto again;
3332 + }
3333 +
3334 + /* Success at resizing! */
3335 + members = map->members;
3336 + hashsize = map->hashsize;
3337 +
3338 + map->initval = tmp.initval;
3339 + map->prime = tmp.prime;
3340 + map->hashsize = tmp.hashsize;
3341 + map->members = tmp.members;
3342 + write_unlock_bh(&set->lock);
3343 +
3344 + ip_set_free(members, hashsize * sizeof(ip_set_ip_t));
3345 +
3346 + return 0;
3347 +}
3348 +
3349 +static inline int
3350 +__delip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
3351 +{
3352 + struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
3353 + ip_set_ip_t id = hash_id(set, ip, hash_ip);
3354 +
3355 + if (id == UINT_MAX)
3356 + return -EEXIST;
3357 +
3358 + map->members[id] = 0;
3359 + return 0;
3360 +}
3361 +
3362 +static int
3363 +delip(struct ip_set *set, const void *data, size_t size,
3364 + ip_set_ip_t *hash_ip)
3365 +{
3366 + struct ip_set_req_iphash *req =
3367 + (struct ip_set_req_iphash *) data;
3368 +
3369 + if (size != sizeof(struct ip_set_req_iphash)) {
3370 + ip_set_printk("data length wrong (want %zu, have %zu)",
3371 + sizeof(struct ip_set_req_iphash),
3372 + size);
3373 + return -EINVAL;
3374 + }
3375 + return __delip(set, req->ip, hash_ip);
3376 +}
3377 +
3378 +static int
3379 +delip_kernel(struct ip_set *set, const struct sk_buff *skb,
3380 + u_int32_t flags, ip_set_ip_t *hash_ip)
3381 +{
3382 + return __delip(set,
3383 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
3384 + : skb->nh.iph->daddr),
3385 + hash_ip);
3386 +}
3387 +
3388 +static int create(struct ip_set *set, const void *data, size_t size)
3389 +{
3390 + unsigned newbytes;
3391 + struct ip_set_req_iphash_create *req =
3392 + (struct ip_set_req_iphash_create *) data;
3393 + struct ip_set_iphash *map;
3394 +
3395 + if (size != sizeof(struct ip_set_req_iphash_create)) {
3396 + ip_set_printk("data length wrong (want %zu, have %zu)",
3397 + sizeof(struct ip_set_req_iphash_create),
3398 + size);
3399 + return -EINVAL;
3400 + }
3401 +
3402 + if (req->hashsize < 1) {
3403 + ip_set_printk("hashsize too small");
3404 + return -ENOEXEC;
3405 + }
3406 +
3407 + map = kmalloc(sizeof(struct ip_set_iphash), GFP_KERNEL);
3408 + if (!map) {
3409 + DP("out of memory for %d bytes",
3410 + sizeof(struct ip_set_iphash));
3411 + return -ENOMEM;
3412 + }
3413 + get_random_bytes(&map->initval, 4);
3414 + map->prime = make_prime(req->hashsize);
3415 + map->hashsize = req->hashsize;
3416 + map->probes = req->probes;
3417 + map->resize = req->resize;
3418 + map->netmask = req->netmask;
3419 + newbytes = map->hashsize * sizeof(ip_set_ip_t);
3420 + map->members = ip_set_malloc(newbytes);
3421 + if (!map->members) {
3422 + DP("out of memory for %d bytes", newbytes);
3423 + kfree(map);
3424 + return -ENOMEM;
3425 + }
3426 + memset(map->members, 0, newbytes);
3427 +
3428 + set->data = map;
3429 + return 0;
3430 +}
3431 +
3432 +static void destroy(struct ip_set *set)
3433 +{
3434 + struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
3435 +
3436 + ip_set_free(map->members, map->hashsize * sizeof(ip_set_ip_t));
3437 + kfree(map);
3438 +
3439 + set->data = NULL;
3440 +}
3441 +
3442 +static void flush(struct ip_set *set)
3443 +{
3444 + struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
3445 + memset(map->members, 0, map->hashsize * sizeof(ip_set_ip_t));
3446 +}
3447 +
3448 +static void list_header(const struct ip_set *set, void *data)
3449 +{
3450 + struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
3451 + struct ip_set_req_iphash_create *header =
3452 + (struct ip_set_req_iphash_create *) data;
3453 +
3454 + header->hashsize = map->hashsize;
3455 + header->probes = map->probes;
3456 + header->resize = map->resize;
3457 + header->netmask = map->netmask;
3458 +}
3459 +
3460 +static int list_members_size(const struct ip_set *set)
3461 +{
3462 + struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
3463 +
3464 + return (map->hashsize * sizeof(ip_set_ip_t));
3465 +}
3466 +
3467 +static void list_members(const struct ip_set *set, void *data)
3468 +{
3469 + struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
3470 + int bytes = map->hashsize * sizeof(ip_set_ip_t);
3471 +
3472 + memcpy(data, map->members, bytes);
3473 +}
3474 +
3475 +static struct ip_set_type ip_set_iphash = {
3476 + .typename = SETTYPE_NAME,
3477 + .typecode = IPSET_TYPE_IP,
3478 + .protocol_version = IP_SET_PROTOCOL_VERSION,
3479 + .create = &create,
3480 + .destroy = &destroy,
3481 + .flush = &flush,
3482 + .reqsize = sizeof(struct ip_set_req_iphash),
3483 + .addip = &addip,
3484 + .addip_kernel = &addip_kernel,
3485 + .retry = &retry,
3486 + .delip = &delip,
3487 + .delip_kernel = &delip_kernel,
3488 + .testip = &testip,
3489 + .testip_kernel = &testip_kernel,
3490 + .header_size = sizeof(struct ip_set_req_iphash_create),
3491 + .list_header = &list_header,
3492 + .list_members_size = &list_members_size,
3493 + .list_members = &list_members,
3494 + .me = THIS_MODULE,
3495 +};
3496 +
3497 +MODULE_LICENSE("GPL");
3498 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
3499 +MODULE_DESCRIPTION("iphash type of IP sets");
3500 +
3501 +static int __init init(void)
3502 +{
3503 + return ip_set_register_set_type(&ip_set_iphash);
3504 +}
3505 +
3506 +static void __exit fini(void)
3507 +{
3508 + /* FIXME: possible race with ip_set_create() */
3509 + ip_set_unregister_set_type(&ip_set_iphash);
3510 +}
3511 +
3512 +module_init(init);
3513 +module_exit(fini);
3514 Index: linux-2.4.35.4/net/ipv4/netfilter/ip_set_ipmap.c
3515 ===================================================================
3516 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
3517 +++ linux-2.4.35.4/net/ipv4/netfilter/ip_set_ipmap.c 2007-12-15 05:20:07.896290225 +0100
3518 @@ -0,0 +1,314 @@
3519 +/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
3520 + * Patrick Schaaf <bof@bof.de>
3521 + * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
3522 + *
3523 + * This program is free software; you can redistribute it and/or modify
3524 + * it under the terms of the GNU General Public License version 2 as
3525 + * published by the Free Software Foundation.
3526 + */
3527 +
3528 +/* Kernel module implementing an IP set type: the single bitmap type */
3529 +
3530 +#include <linux/module.h>
3531 +#include <linux/ip.h>
3532 +#include <linux/skbuff.h>
3533 +#include <linux/netfilter_ipv4/ip_tables.h>
3534 +#include <linux/netfilter_ipv4/ip_set.h>
3535 +#include <linux/errno.h>
3536 +#include <asm/uaccess.h>
3537 +#include <asm/bitops.h>
3538 +#include <asm/softirq.h>
3539 +#include <linux/spinlock.h>
3540 +
3541 +#include <linux/netfilter_ipv4/ip_set_ipmap.h>
3542 +
3543 +static inline ip_set_ip_t
3544 +ip_to_id(const struct ip_set_ipmap *map, ip_set_ip_t ip)
3545 +{
3546 + return (ip - map->first_ip)/map->hosts;
3547 +}
3548 +
3549 +static inline int
3550 +__testip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
3551 +{
3552 + struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
3553 +
3554 + if (ip < map->first_ip || ip > map->last_ip)
3555 + return -ERANGE;
3556 +
3557 + *hash_ip = ip & map->netmask;
3558 + DP("set: %s, ip:%u.%u.%u.%u, %u.%u.%u.%u",
3559 + set->name, HIPQUAD(ip), HIPQUAD(*hash_ip));
3560 + return !!test_bit(ip_to_id(map, *hash_ip), map->members);
3561 +}
3562 +
3563 +static int
3564 +testip(struct ip_set *set, const void *data, size_t size,
3565 + ip_set_ip_t *hash_ip)
3566 +{
3567 + struct ip_set_req_ipmap *req =
3568 + (struct ip_set_req_ipmap *) data;
3569 +
3570 + if (size != sizeof(struct ip_set_req_ipmap)) {
3571 + ip_set_printk("data length wrong (want %zu, have %zu)",
3572 + sizeof(struct ip_set_req_ipmap),
3573 + size);
3574 + return -EINVAL;
3575 + }
3576 + return __testip(set, req->ip, hash_ip);
3577 +}
3578 +
3579 +static int
3580 +testip_kernel(struct ip_set *set,
3581 + const struct sk_buff *skb,
3582 + u_int32_t flags,
3583 + ip_set_ip_t *hash_ip)
3584 +{
3585 + int res;
3586 +
3587 + DP("flag: %s src: %u.%u.%u.%u dst: %u.%u.%u.%u",
3588 + flags & IPSET_SRC ? "SRC" : "DST",
3589 + NIPQUAD(skb->nh.iph->saddr),
3590 + NIPQUAD(skb->nh.iph->daddr));
3591 +
3592 + res = __testip(set,
3593 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
3594 + : skb->nh.iph->daddr),
3595 + hash_ip);
3596 + return (res < 0 ? 0 : res);
3597 +}
3598 +
3599 +static inline int
3600 +__addip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
3601 +{
3602 + struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
3603 +
3604 + if (ip < map->first_ip || ip > map->last_ip)
3605 + return -ERANGE;
3606 +
3607 + *hash_ip = ip & map->netmask;
3608 + DP("%u.%u.%u.%u, %u.%u.%u.%u", HIPQUAD(ip), HIPQUAD(*hash_ip));
3609 + if (test_and_set_bit(ip_to_id(map, *hash_ip), map->members))
3610 + return -EEXIST;
3611 +
3612 + return 0;
3613 +}
3614 +
3615 +static int
3616 +addip(struct ip_set *set, const void *data, size_t size,
3617 + ip_set_ip_t *hash_ip)
3618 +{
3619 + struct ip_set_req_ipmap *req =
3620 + (struct ip_set_req_ipmap *) data;
3621 +
3622 + if (size != sizeof(struct ip_set_req_ipmap)) {
3623 + ip_set_printk("data length wrong (want %zu, have %zu)",
3624 + sizeof(struct ip_set_req_ipmap),
3625 + size);
3626 + return -EINVAL;
3627 + }
3628 + DP("%u.%u.%u.%u", HIPQUAD(req->ip));
3629 + return __addip(set, req->ip, hash_ip);
3630 +}
3631 +
3632 +static int
3633 +addip_kernel(struct ip_set *set, const struct sk_buff *skb,
3634 + u_int32_t flags, ip_set_ip_t *hash_ip)
3635 +{
3636 + return __addip(set,
3637 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
3638 + : skb->nh.iph->daddr),
3639 + hash_ip);
3640 +}
3641 +
3642 +static inline int
3643 +__delip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
3644 +{
3645 + struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
3646 +
3647 + if (ip < map->first_ip || ip > map->last_ip)
3648 + return -ERANGE;
3649 +
3650 + *hash_ip = ip & map->netmask;
3651 + DP("%u.%u.%u.%u, %u.%u.%u.%u", HIPQUAD(ip), HIPQUAD(*hash_ip));
3652 + if (!test_and_clear_bit(ip_to_id(map, *hash_ip), map->members))
3653 + return -EEXIST;
3654 +
3655 + return 0;
3656 +}
3657 +
3658 +static int
3659 +delip(struct ip_set *set, const void *data, size_t size,
3660 + ip_set_ip_t *hash_ip)
3661 +{
3662 + struct ip_set_req_ipmap *req =
3663 + (struct ip_set_req_ipmap *) data;
3664 +
3665 + if (size != sizeof(struct ip_set_req_ipmap)) {
3666 + ip_set_printk("data length wrong (want %zu, have %zu)",
3667 + sizeof(struct ip_set_req_ipmap),
3668 + size);
3669 + return -EINVAL;
3670 + }
3671 + return __delip(set, req->ip, hash_ip);
3672 +}
3673 +
3674 +static int
3675 +delip_kernel(struct ip_set *set, const struct sk_buff *skb,
3676 + u_int32_t flags, ip_set_ip_t *hash_ip)
3677 +{
3678 + return __delip(set,
3679 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
3680 + : skb->nh.iph->daddr),
3681 + hash_ip);
3682 +}
3683 +
3684 +static int create(struct ip_set *set, const void *data, size_t size)
3685 +{
3686 + int newbytes;
3687 + struct ip_set_req_ipmap_create *req =
3688 + (struct ip_set_req_ipmap_create *) data;
3689 + struct ip_set_ipmap *map;
3690 +
3691 + if (size != sizeof(struct ip_set_req_ipmap_create)) {
3692 + ip_set_printk("data length wrong (want %zu, have %zu)",
3693 + sizeof(struct ip_set_req_ipmap_create),
3694 + size);
3695 + return -EINVAL;
3696 + }
3697 +
3698 + DP("from %u.%u.%u.%u to %u.%u.%u.%u",
3699 + HIPQUAD(req->from), HIPQUAD(req->to));
3700 +
3701 + if (req->from > req->to) {
3702 + DP("bad ip range");
3703 + return -ENOEXEC;
3704 + }
3705 +
3706 + if (req->to - req->from > MAX_RANGE) {
3707 + ip_set_printk("range too big (max %d addresses)",
3708 + MAX_RANGE);
3709 + return -ENOEXEC;
3710 + }
3711 +
3712 + map = kmalloc(sizeof(struct ip_set_ipmap), GFP_KERNEL);
3713 + if (!map) {
3714 + DP("out of memory for %d bytes",
3715 + sizeof(struct ip_set_ipmap));
3716 + return -ENOMEM;
3717 + }
3718 + map->first_ip = req->from;
3719 + map->last_ip = req->to;
3720 + map->netmask = req->netmask;
3721 +
3722 + if (req->netmask == 0xFFFFFFFF) {
3723 + map->hosts = 1;
3724 + map->sizeid = map->last_ip - map->first_ip + 1;
3725 + } else {
3726 + unsigned int mask_bits, netmask_bits;
3727 + ip_set_ip_t mask;
3728 +
3729 + map->first_ip &= map->netmask; /* Should we better bark? */
3730 +
3731 + mask = range_to_mask(map->first_ip, map->last_ip, &mask_bits);
3732 + netmask_bits = mask_to_bits(map->netmask);
3733 +
3734 + if (!mask || netmask_bits <= mask_bits)
3735 + return -ENOEXEC;
3736 +
3737 + map->hosts = 2 << (32 - netmask_bits - 1);
3738 + map->sizeid = 2 << (netmask_bits - mask_bits - 1);
3739 + }
3740 + newbytes = bitmap_bytes(0, map->sizeid - 1);
3741 + map->members = kmalloc(newbytes, GFP_KERNEL);
3742 + if (!map->members) {
3743 + DP("out of memory for %d bytes", newbytes);
3744 + kfree(map);
3745 + return -ENOMEM;
3746 + }
3747 + memset(map->members, 0, newbytes);
3748 +
3749 + set->data = map;
3750 + return 0;
3751 +}
3752 +
3753 +static void destroy(struct ip_set *set)
3754 +{
3755 + struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
3756 +
3757 + kfree(map->members);
3758 + kfree(map);
3759 +
3760 + set->data = NULL;
3761 +}
3762 +
3763 +static void flush(struct ip_set *set)
3764 +{
3765 + struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
3766 + memset(map->members, 0, bitmap_bytes(0, map->sizeid - 1));
3767 +}
3768 +
3769 +static void list_header(const struct ip_set *set, void *data)
3770 +{
3771 + struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
3772 + struct ip_set_req_ipmap_create *header =
3773 + (struct ip_set_req_ipmap_create *) data;
3774 +
3775 + header->from = map->first_ip;
3776 + header->to = map->last_ip;
3777 + header->netmask = map->netmask;
3778 +}
3779 +
3780 +static int list_members_size(const struct ip_set *set)
3781 +{
3782 + struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
3783 +
3784 + return bitmap_bytes(0, map->sizeid - 1);
3785 +}
3786 +
3787 +static void list_members(const struct ip_set *set, void *data)
3788 +{
3789 + struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
3790 + int bytes = bitmap_bytes(0, map->sizeid - 1);
3791 +
3792 + memcpy(data, map->members, bytes);
3793 +}
3794 +
3795 +static struct ip_set_type ip_set_ipmap = {
3796 + .typename = SETTYPE_NAME,
3797 + .typecode = IPSET_TYPE_IP,
3798 + .protocol_version = IP_SET_PROTOCOL_VERSION,
3799 + .create = &create,
3800 + .destroy = &destroy,
3801 + .flush = &flush,
3802 + .reqsize = sizeof(struct ip_set_req_ipmap),
3803 + .addip = &addip,
3804 + .addip_kernel = &addip_kernel,
3805 + .delip = &delip,
3806 + .delip_kernel = &delip_kernel,
3807 + .testip = &testip,
3808 + .testip_kernel = &testip_kernel,
3809 + .header_size = sizeof(struct ip_set_req_ipmap_create),
3810 + .list_header = &list_header,
3811 + .list_members_size = &list_members_size,
3812 + .list_members = &list_members,
3813 + .me = THIS_MODULE,
3814 +};
3815 +
3816 +MODULE_LICENSE("GPL");
3817 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
3818 +MODULE_DESCRIPTION("ipmap type of IP sets");
3819 +
3820 +static int __init init(void)
3821 +{
3822 + return ip_set_register_set_type(&ip_set_ipmap);
3823 +}
3824 +
3825 +static void __exit fini(void)
3826 +{
3827 + /* FIXME: possible race with ip_set_create() */
3828 + ip_set_unregister_set_type(&ip_set_ipmap);
3829 +}
3830 +
3831 +module_init(init);
3832 +module_exit(fini);
3833 Index: linux-2.4.35.4/net/ipv4/netfilter/ip_set_iptree.c
3834 ===================================================================
3835 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
3836 +++ linux-2.4.35.4/net/ipv4/netfilter/ip_set_iptree.c 2007-12-15 05:20:07.896290225 +0100
3837 @@ -0,0 +1,511 @@
3838 +/* Copyright (C) 2005 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
3839 + *
3840 + * This program is free software; you can redistribute it and/or modify
3841 + * it under the terms of the GNU General Public License version 2 as
3842 + * published by the Free Software Foundation.
3843 + */
3844 +
3845 +/* Kernel module implementing an IP set type: the iptree type */
3846 +
3847 +#include <linux/module.h>
3848 +#include <linux/ip.h>
3849 +#include <linux/skbuff.h>
3850 +#include <linux/slab.h>
3851 +#include <linux/delay.h>
3852 +#include <linux/netfilter_ipv4/ip_tables.h>
3853 +#include <linux/netfilter_ipv4/ip_set.h>
3854 +#include <linux/errno.h>
3855 +#include <asm/uaccess.h>
3856 +#include <asm/bitops.h>
3857 +#include <linux/interrupt.h>
3858 +#include <linux/spinlock.h>
3859 +
3860 +#include <linux/netfilter_ipv4/ip_set_iptree.h>
3861 +
3862 +/* Garbage collection interval in seconds: */
3863 +#define IPTREE_GC_TIME 5*60
3864 +/* Sleep so many milliseconds before trying again
3865 + * to delete the gc timer at destroying a set */
3866 +#define IPTREE_DESTROY_SLEEP 100
3867 +
3868 +static kmem_cache_t *branch_cachep;
3869 +static kmem_cache_t *leaf_cachep;
3870 +
3871 +#define ABCD(a,b,c,d,addrp) do { \
3872 + a = ((unsigned char *)addrp)[3]; \
3873 + b = ((unsigned char *)addrp)[2]; \
3874 + c = ((unsigned char *)addrp)[1]; \
3875 + d = ((unsigned char *)addrp)[0]; \
3876 +} while (0)
3877 +
3878 +#define TESTIP_WALK(map, elem, branch) do { \
3879 + if ((map)->tree[elem]) { \
3880 + branch = (map)->tree[elem]; \
3881 + } else \
3882 + return 0; \
3883 +} while (0)
3884 +
3885 +static inline int
3886 +__testip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
3887 +{
3888 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
3889 + struct ip_set_iptreeb *btree;
3890 + struct ip_set_iptreec *ctree;
3891 + struct ip_set_iptreed *dtree;
3892 + unsigned char a,b,c,d;
3893 +
3894 + *hash_ip = ip;
3895 + ABCD(a, b, c, d, hash_ip);
3896 + DP("%u %u %u %u timeout %u", a, b, c, d, map->timeout);
3897 + TESTIP_WALK(map, a, btree);
3898 + TESTIP_WALK(btree, b, ctree);
3899 + TESTIP_WALK(ctree, c, dtree);
3900 + DP("%lu %lu", dtree->expires[d], jiffies);
3901 + return !!(map->timeout ? (time_after(dtree->expires[d], jiffies))
3902 + : dtree->expires[d]);
3903 +}
3904 +
3905 +static int
3906 +testip(struct ip_set *set, const void *data, size_t size,
3907 + ip_set_ip_t *hash_ip)
3908 +{
3909 + struct ip_set_req_iptree *req =
3910 + (struct ip_set_req_iptree *) data;
3911 +
3912 + if (size != sizeof(struct ip_set_req_iptree)) {
3913 + ip_set_printk("data length wrong (want %zu, have %zu)",
3914 + sizeof(struct ip_set_req_iptree),
3915 + size);
3916 + return -EINVAL;
3917 + }
3918 + return __testip(set, req->ip, hash_ip);
3919 +}
3920 +
3921 +static int
3922 +testip_kernel(struct ip_set *set,
3923 + const struct sk_buff *skb,
3924 + u_int32_t flags,
3925 + ip_set_ip_t *hash_ip)
3926 +{
3927 + int res;
3928 +
3929 + DP("flag: %s src: %u.%u.%u.%u dst: %u.%u.%u.%u",
3930 + flags & IPSET_SRC ? "SRC" : "DST",
3931 + NIPQUAD(skb->nh.iph->saddr),
3932 + NIPQUAD(skb->nh.iph->daddr));
3933 +
3934 + res = __testip(set,
3935 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
3936 + : skb->nh.iph->daddr),
3937 + hash_ip);
3938 + return (res < 0 ? 0 : res);
3939 +}
3940 +
3941 +#define ADDIP_WALK(map, elem, branch, type, cachep) do { \
3942 + if ((map)->tree[elem]) { \
3943 + DP("found %u", elem); \
3944 + branch = (map)->tree[elem]; \
3945 + } else { \
3946 + branch = (type *) \
3947 + kmem_cache_alloc(cachep, GFP_KERNEL); \
3948 + if (branch == NULL) \
3949 + return -ENOMEM; \
3950 + memset(branch, 0, sizeof(*branch)); \
3951 + (map)->tree[elem] = branch; \
3952 + DP("alloc %u", elem); \
3953 + } \
3954 +} while (0)
3955 +
3956 +static inline int
3957 +__addip(struct ip_set *set, ip_set_ip_t ip, unsigned int timeout,
3958 + ip_set_ip_t *hash_ip)
3959 +{
3960 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
3961 + struct ip_set_iptreeb *btree;
3962 + struct ip_set_iptreec *ctree;
3963 + struct ip_set_iptreed *dtree;
3964 + unsigned char a,b,c,d;
3965 + int ret = 0;
3966 +
3967 + *hash_ip = ip;
3968 + ABCD(a, b, c, d, hash_ip);
3969 + DP("%u %u %u %u timeout %u", a, b, c, d, timeout);
3970 + ADDIP_WALK(map, a, btree, struct ip_set_iptreeb, branch_cachep);
3971 + ADDIP_WALK(btree, b, ctree, struct ip_set_iptreec, branch_cachep);
3972 + ADDIP_WALK(ctree, c, dtree, struct ip_set_iptreed, leaf_cachep);
3973 + if (dtree->expires[d]
3974 + && (!map->timeout || time_after(dtree->expires[d], jiffies)))
3975 + ret = -EEXIST;
3976 + dtree->expires[d] = map->timeout ? (timeout * HZ + jiffies) : 1;
3977 + DP("%u %lu", d, dtree->expires[d]);
3978 + return ret;
3979 +}
3980 +
3981 +static int
3982 +addip(struct ip_set *set, const void *data, size_t size,
3983 + ip_set_ip_t *hash_ip)
3984 +{
3985 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
3986 + struct ip_set_req_iptree *req =
3987 + (struct ip_set_req_iptree *) data;
3988 +
3989 + if (size != sizeof(struct ip_set_req_iptree)) {
3990 + ip_set_printk("data length wrong (want %zu, have %zu)",
3991 + sizeof(struct ip_set_req_iptree),
3992 + size);
3993 + return -EINVAL;
3994 + }
3995 + DP("%u.%u.%u.%u %u", HIPQUAD(req->ip), req->timeout);
3996 + return __addip(set, req->ip,
3997 + req->timeout ? req->timeout : map->timeout,
3998 + hash_ip);
3999 +}
4000 +
4001 +static int
4002 +addip_kernel(struct ip_set *set, const struct sk_buff *skb,
4003 + u_int32_t flags, ip_set_ip_t *hash_ip)
4004 +{
4005 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
4006 +
4007 + return __addip(set,
4008 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
4009 + : skb->nh.iph->daddr),
4010 + map->timeout,
4011 + hash_ip);
4012 +}
4013 +
4014 +#define DELIP_WALK(map, elem, branch) do { \
4015 + if ((map)->tree[elem]) { \
4016 + branch = (map)->tree[elem]; \
4017 + } else \
4018 + return -EEXIST; \
4019 +} while (0)
4020 +
4021 +static inline int
4022 +__delip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
4023 +{
4024 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
4025 + struct ip_set_iptreeb *btree;
4026 + struct ip_set_iptreec *ctree;
4027 + struct ip_set_iptreed *dtree;
4028 + unsigned char a,b,c,d;
4029 +
4030 + *hash_ip = ip;
4031 + ABCD(a, b, c, d, hash_ip);
4032 + DELIP_WALK(map, a, btree);
4033 + DELIP_WALK(btree, b, ctree);
4034 + DELIP_WALK(ctree, c, dtree);
4035 +
4036 + if (dtree->expires[d]) {
4037 + dtree->expires[d] = 0;
4038 + return 0;
4039 + }
4040 + return -EEXIST;
4041 +}
4042 +
4043 +static int
4044 +delip(struct ip_set *set, const void *data, size_t size,
4045 + ip_set_ip_t *hash_ip)
4046 +{
4047 + struct ip_set_req_iptree *req =
4048 + (struct ip_set_req_iptree *) data;
4049 +
4050 + if (size != sizeof(struct ip_set_req_iptree)) {
4051 + ip_set_printk("data length wrong (want %zu, have %zu)",
4052 + sizeof(struct ip_set_req_iptree),
4053 + size);
4054 + return -EINVAL;
4055 + }
4056 + return __delip(set, req->ip, hash_ip);
4057 +}
4058 +
4059 +static int
4060 +delip_kernel(struct ip_set *set, const struct sk_buff *skb,
4061 + u_int32_t flags, ip_set_ip_t *hash_ip)
4062 +{
4063 + return __delip(set,
4064 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
4065 + : skb->nh.iph->daddr),
4066 + hash_ip);
4067 +}
4068 +
4069 +#define LOOP_WALK_BEGIN(map, i, branch) \
4070 + for (i = 0; i < 255; i++) { \
4071 + if (!(map)->tree[i]) \
4072 + continue; \
4073 + branch = (map)->tree[i]
4074 +
4075 +#define LOOP_WALK_END }
4076 +
4077 +static void ip_tree_gc(unsigned long ul_set)
4078 +{
4079 + struct ip_set *set = (void *) ul_set;
4080 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
4081 + struct ip_set_iptreeb *btree;
4082 + struct ip_set_iptreec *ctree;
4083 + struct ip_set_iptreed *dtree;
4084 + unsigned char a,b,c,d;
4085 + unsigned char i,j,k;
4086 +
4087 + i = j = k = 0;
4088 + DP("gc: %s", set->name);
4089 + write_lock_bh(&set->lock);
4090 + LOOP_WALK_BEGIN(map, a, btree);
4091 + LOOP_WALK_BEGIN(btree, b, ctree);
4092 + LOOP_WALK_BEGIN(ctree, c, dtree);
4093 + for (d = 0; d < 255; d++) {
4094 + if (dtree->expires[d]) {
4095 + DP("gc: %u %u %u %u: expires %lu jiffies %lu",
4096 + a, b, c, d,
4097 + dtree->expires[d], jiffies);
4098 + if (map->timeout
4099 + && time_before(dtree->expires[d], jiffies))
4100 + dtree->expires[d] = 0;
4101 + else
4102 + k = 1;
4103 + }
4104 + }
4105 + if (k == 0) {
4106 + DP("gc: %s: leaf %u %u %u empty",
4107 + set->name, a, b, c);
4108 + kmem_cache_free(leaf_cachep, dtree);
4109 + ctree->tree[c] = NULL;
4110 + } else {
4111 + DP("gc: %s: leaf %u %u %u not empty",
4112 + set->name, a, b, c);
4113 + j = 1;
4114 + k = 0;
4115 + }
4116 + LOOP_WALK_END;
4117 + if (j == 0) {
4118 + DP("gc: %s: branch %u %u empty",
4119 + set->name, a, b);
4120 + kmem_cache_free(branch_cachep, ctree);
4121 + btree->tree[b] = NULL;
4122 + } else {
4123 + DP("gc: %s: branch %u %u not empty",
4124 + set->name, a, b);
4125 + i = 1;
4126 + j = k = 0;
4127 + }
4128 + LOOP_WALK_END;
4129 + if (i == 0) {
4130 + DP("gc: %s: branch %u empty",
4131 + set->name, a);
4132 + kmem_cache_free(branch_cachep, btree);
4133 + map->tree[a] = NULL;
4134 + } else {
4135 + DP("gc: %s: branch %u not empty",
4136 + set->name, a);
4137 + i = j = k = 0;
4138 + }
4139 + LOOP_WALK_END;
4140 + write_unlock_bh(&set->lock);
4141 +
4142 + map->gc.expires = jiffies + map->gc_interval * HZ;
4143 + add_timer(&map->gc);
4144 +}
4145 +
4146 +static int create(struct ip_set *set, const void *data, size_t size)
4147 +{
4148 + struct ip_set_req_iptree_create *req =
4149 + (struct ip_set_req_iptree_create *) data;
4150 + struct ip_set_iptree *map;
4151 +
4152 + if (size != sizeof(struct ip_set_req_iptree_create)) {
4153 + ip_set_printk("data length wrong (want %zu, have %zu)",
4154 + sizeof(struct ip_set_req_iptree_create),
4155 + size);
4156 + return -EINVAL;
4157 + }
4158 +
4159 + map = kmalloc(sizeof(struct ip_set_iptree), GFP_KERNEL);
4160 + if (!map) {
4161 + DP("out of memory for %d bytes",
4162 + sizeof(struct ip_set_iptree));
4163 + return -ENOMEM;
4164 + }
4165 + memset(map, 0, sizeof(*map));
4166 + map->timeout = req->timeout;
4167 + set->data = map;
4168 +
4169 + /* If there is no timeout for the entries,
4170 + * we still have to call gc because delete
4171 + * do not clean up empty branches */
4172 + map->gc_interval = IPTREE_GC_TIME;
4173 + init_timer(&map->gc);
4174 + map->gc.data = (unsigned long) set;
4175 + map->gc.function = ip_tree_gc;
4176 + map->gc.expires = jiffies + map->gc_interval * HZ;
4177 + add_timer(&map->gc);
4178 +
4179 + return 0;
4180 +}
4181 +
4182 +static void __flush(struct ip_set_iptree *map)
4183 +{
4184 + struct ip_set_iptreeb *btree;
4185 + struct ip_set_iptreec *ctree;
4186 + struct ip_set_iptreed *dtree;
4187 + unsigned int a,b,c;
4188 +
4189 + LOOP_WALK_BEGIN(map, a, btree);
4190 + LOOP_WALK_BEGIN(btree, b, ctree);
4191 + LOOP_WALK_BEGIN(ctree, c, dtree);
4192 + kmem_cache_free(leaf_cachep, dtree);
4193 + LOOP_WALK_END;
4194 + kmem_cache_free(branch_cachep, ctree);
4195 + LOOP_WALK_END;
4196 + kmem_cache_free(branch_cachep, btree);
4197 + LOOP_WALK_END;
4198 +}
4199 +
4200 +static void destroy(struct ip_set *set)
4201 +{
4202 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
4203 +
4204 + while (!del_timer(&map->gc))
4205 + msleep(IPTREE_DESTROY_SLEEP);
4206 + __flush(map);
4207 + kfree(map);
4208 + set->data = NULL;
4209 +}
4210 +
4211 +static void flush(struct ip_set *set)
4212 +{
4213 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
4214 + unsigned int timeout = map->timeout;
4215 +
4216 + __flush(map);
4217 + memset(map, 0, sizeof(*map));
4218 + map->timeout = timeout;
4219 +}
4220 +
4221 +static void list_header(const struct ip_set *set, void *data)
4222 +{
4223 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
4224 + struct ip_set_req_iptree_create *header =
4225 + (struct ip_set_req_iptree_create *) data;
4226 +
4227 + header->timeout = map->timeout;
4228 +}
4229 +
4230 +static int list_members_size(const struct ip_set *set)
4231 +{
4232 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
4233 + struct ip_set_iptreeb *btree;
4234 + struct ip_set_iptreec *ctree;
4235 + struct ip_set_iptreed *dtree;
4236 + unsigned char a,b,c,d;
4237 + unsigned int count = 0;
4238 +
4239 + LOOP_WALK_BEGIN(map, a, btree);
4240 + LOOP_WALK_BEGIN(btree, b, ctree);
4241 + LOOP_WALK_BEGIN(ctree, c, dtree);
4242 + for (d = 0; d < 255; d++) {
4243 + if (dtree->expires[d]
4244 + && (!map->timeout || time_after(dtree->expires[d], jiffies)))
4245 + count++;
4246 + }
4247 + LOOP_WALK_END;
4248 + LOOP_WALK_END;
4249 + LOOP_WALK_END;
4250 +
4251 + DP("members %u", count);
4252 + return (count * sizeof(struct ip_set_req_iptree));
4253 +}
4254 +
4255 +static void list_members(const struct ip_set *set, void *data)
4256 +{
4257 + struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
4258 + struct ip_set_iptreeb *btree;
4259 + struct ip_set_iptreec *ctree;
4260 + struct ip_set_iptreed *dtree;
4261 + unsigned char a,b,c,d;
4262 + size_t offset = 0;
4263 + struct ip_set_req_iptree *entry;
4264 +
4265 + LOOP_WALK_BEGIN(map, a, btree);
4266 + LOOP_WALK_BEGIN(btree, b, ctree);
4267 + LOOP_WALK_BEGIN(ctree, c, dtree);
4268 + for (d = 0; d < 255; d++) {
4269 + if (dtree->expires[d]
4270 + && (!map->timeout || time_after(dtree->expires[d], jiffies))) {
4271 + entry = (struct ip_set_req_iptree *)(data + offset);
4272 + entry->ip = ((a << 24) | (b << 16) | (c << 8) | d);
4273 + entry->timeout = !map->timeout ? 0
4274 + : (dtree->expires[d] - jiffies)/HZ;
4275 + offset += sizeof(struct ip_set_req_iptree);
4276 + }
4277 + }
4278 + LOOP_WALK_END;
4279 + LOOP_WALK_END;
4280 + LOOP_WALK_END;
4281 +}
4282 +
4283 +static struct ip_set_type ip_set_iptree = {
4284 + .typename = SETTYPE_NAME,
4285 + .typecode = IPSET_TYPE_IP,
4286 + .protocol_version = IP_SET_PROTOCOL_VERSION,
4287 + .create = &create,
4288 + .destroy = &destroy,
4289 + .flush = &flush,
4290 + .reqsize = sizeof(struct ip_set_req_iptree),
4291 + .addip = &addip,
4292 + .addip_kernel = &addip_kernel,
4293 + .delip = &delip,
4294 + .delip_kernel = &delip_kernel,
4295 + .testip = &testip,
4296 + .testip_kernel = &testip_kernel,
4297 + .header_size = sizeof(struct ip_set_req_iptree_create),
4298 + .list_header = &list_header,
4299 + .list_members_size = &list_members_size,
4300 + .list_members = &list_members,
4301 + .me = THIS_MODULE,
4302 +};
4303 +
4304 +MODULE_LICENSE("GPL");
4305 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
4306 +MODULE_DESCRIPTION("iptree type of IP sets");
4307 +
4308 +static int __init init(void)
4309 +{
4310 + int ret;
4311 +
4312 + branch_cachep = kmem_cache_create("ip_set_iptreeb",
4313 + sizeof(struct ip_set_iptreeb),
4314 + 0, 0, NULL, NULL);
4315 + if (!branch_cachep) {
4316 + printk(KERN_ERR "Unable to create ip_set_iptreeb slab cache\n");
4317 + ret = -ENOMEM;
4318 + goto out;
4319 + }
4320 + leaf_cachep = kmem_cache_create("ip_set_iptreed",
4321 + sizeof(struct ip_set_iptreed),
4322 + 0, 0, NULL, NULL);
4323 + if (!leaf_cachep) {
4324 + printk(KERN_ERR "Unable to create ip_set_iptreed slab cache\n");
4325 + ret = -ENOMEM;
4326 + goto free_branch;
4327 + }
4328 + ret = ip_set_register_set_type(&ip_set_iptree);
4329 + if (ret == 0)
4330 + goto out;
4331 +
4332 + kmem_cache_destroy(leaf_cachep);
4333 + free_branch:
4334 + kmem_cache_destroy(branch_cachep);
4335 + out:
4336 + return ret;
4337 +}
4338 +
4339 +static void __exit fini(void)
4340 +{
4341 + /* FIXME: possible race with ip_set_create() */
4342 + ip_set_unregister_set_type(&ip_set_iptree);
4343 + kmem_cache_destroy(leaf_cachep);
4344 + kmem_cache_destroy(branch_cachep);
4345 +}
4346 +
4347 +module_init(init);
4348 +module_exit(fini);
4349 Index: linux-2.4.35.4/net/ipv4/netfilter/ip_set_macipmap.c
4350 ===================================================================
4351 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
4352 +++ linux-2.4.35.4/net/ipv4/netfilter/ip_set_macipmap.c 2007-12-15 05:20:07.896290225 +0100
4353 @@ -0,0 +1,340 @@
4354 +/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
4355 + * Patrick Schaaf <bof@bof.de>
4356 + * Martin Josefsson <gandalf@wlug.westbo.se>
4357 + * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
4358 + *
4359 + * This program is free software; you can redistribute it and/or modify
4360 + * it under the terms of the GNU General Public License version 2 as
4361 + * published by the Free Software Foundation.
4362 + */
4363 +
4364 +/* Kernel module implementing an IP set type: the macipmap type */
4365 +
4366 +#include <linux/module.h>
4367 +#include <linux/ip.h>
4368 +#include <linux/skbuff.h>
4369 +#include <linux/netfilter_ipv4/ip_tables.h>
4370 +#include <linux/netfilter_ipv4/ip_set.h>
4371 +#include <linux/errno.h>
4372 +#include <asm/uaccess.h>
4373 +#include <asm/bitops.h>
4374 +#include <asm/softirq.h>
4375 +#include <linux/spinlock.h>
4376 +#include <linux/if_ether.h>
4377 +#include <linux/vmalloc.h>
4378 +
4379 +#include <linux/netfilter_ipv4/ip_set_malloc.h>
4380 +#include <linux/netfilter_ipv4/ip_set_macipmap.h>
4381 +
4382 +static int
4383 +testip(struct ip_set *set, const void *data, size_t size, ip_set_ip_t *hash_ip)
4384 +{
4385 + struct ip_set_macipmap *map = (struct ip_set_macipmap *) set->data;
4386 + struct ip_set_macip *table = (struct ip_set_macip *) map->members;
4387 + struct ip_set_req_macipmap *req = (struct ip_set_req_macipmap *) data;
4388 +
4389 + if (size != sizeof(struct ip_set_req_macipmap)) {
4390 + ip_set_printk("data length wrong (want %zu, have %zu)",
4391 + sizeof(struct ip_set_req_macipmap),
4392 + size);
4393 + return -EINVAL;
4394 + }
4395 +
4396 + if (req->ip < map->first_ip || req->ip > map->last_ip)
4397 + return -ERANGE;
4398 +
4399 + *hash_ip = req->ip;
4400 + DP("set: %s, ip:%u.%u.%u.%u, %u.%u.%u.%u",
4401 + set->name, HIPQUAD(req->ip), HIPQUAD(*hash_ip));
4402 + if (test_bit(IPSET_MACIP_ISSET,
4403 + &table[req->ip - map->first_ip].flags)) {
4404 + return (memcmp(req->ethernet,
4405 + &table[req->ip - map->first_ip].ethernet,
4406 + ETH_ALEN) == 0);
4407 + } else {
4408 + return (map->flags & IPSET_MACIP_MATCHUNSET ? 1 : 0);
4409 + }
4410 +}
4411 +
4412 +static int
4413 +testip_kernel(struct ip_set *set, const struct sk_buff *skb,
4414 + u_int32_t flags, ip_set_ip_t *hash_ip)
4415 +{
4416 + struct ip_set_macipmap *map =
4417 + (struct ip_set_macipmap *) set->data;
4418 + struct ip_set_macip *table =
4419 + (struct ip_set_macip *) map->members;
4420 + ip_set_ip_t ip;
4421 +
4422 + ip = ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
4423 + : skb->nh.iph->daddr);
4424 + DP("flag: %s src: %u.%u.%u.%u dst: %u.%u.%u.%u",
4425 + flags & IPSET_SRC ? "SRC" : "DST",
4426 + NIPQUAD(skb->nh.iph->saddr),
4427 + NIPQUAD(skb->nh.iph->daddr));
4428 +
4429 + if (ip < map->first_ip || ip > map->last_ip)
4430 + return 0;
4431 +
4432 + *hash_ip = ip;
4433 + DP("set: %s, ip:%u.%u.%u.%u, %u.%u.%u.%u",
4434 + set->name, HIPQUAD(ip), HIPQUAD(*hash_ip));
4435 + if (test_bit(IPSET_MACIP_ISSET, &table[ip - map->first_ip].flags)) {
4436 + /* Is mac pointer valid?
4437 + * If so, compare... */
4438 + return (skb->mac.raw >= skb->head
4439 + && (skb->mac.raw + ETH_HLEN) <= skb->data
4440 + && (memcmp(skb->mac.ethernet->h_source,
4441 + &table[ip - map->first_ip].ethernet,
4442 + ETH_ALEN) == 0));
4443 + } else {
4444 + return (map->flags & IPSET_MACIP_MATCHUNSET ? 1 : 0);
4445 + }
4446 +}
4447 +
4448 +/* returns 0 on success */
4449 +static inline int
4450 +__addip(struct ip_set *set,
4451 + ip_set_ip_t ip, unsigned char *ethernet, ip_set_ip_t *hash_ip)
4452 +{
4453 + struct ip_set_macipmap *map =
4454 + (struct ip_set_macipmap *) set->data;
4455 + struct ip_set_macip *table =
4456 + (struct ip_set_macip *) map->members;
4457 +
4458 + if (ip < map->first_ip || ip > map->last_ip)
4459 + return -ERANGE;
4460 + if (test_and_set_bit(IPSET_MACIP_ISSET,
4461 + &table[ip - map->first_ip].flags))
4462 + return -EEXIST;
4463 +
4464 + *hash_ip = ip;
4465 + DP("%u.%u.%u.%u, %u.%u.%u.%u", HIPQUAD(ip), HIPQUAD(*hash_ip));
4466 + memcpy(&table[ip - map->first_ip].ethernet, ethernet, ETH_ALEN);
4467 + return 0;
4468 +}
4469 +
4470 +static int
4471 +addip(struct ip_set *set, const void *data, size_t size,
4472 + ip_set_ip_t *hash_ip)
4473 +{
4474 + struct ip_set_req_macipmap *req =
4475 + (struct ip_set_req_macipmap *) data;
4476 +
4477 + if (size != sizeof(struct ip_set_req_macipmap)) {
4478 + ip_set_printk("data length wrong (want %zu, have %zu)",
4479 + sizeof(struct ip_set_req_macipmap),
4480 + size);
4481 + return -EINVAL;
4482 + }
4483 + return __addip(set, req->ip, req->ethernet, hash_ip);
4484 +}
4485 +
4486 +static int
4487 +addip_kernel(struct ip_set *set, const struct sk_buff *skb,
4488 + u_int32_t flags, ip_set_ip_t *hash_ip)
4489 +{
4490 + ip_set_ip_t ip;
4491 +
4492 + ip = ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
4493 + : skb->nh.iph->daddr);
4494 +
4495 + if (!(skb->mac.raw >= skb->head
4496 + && (skb->mac.raw + ETH_HLEN) <= skb->data))
4497 + return -EINVAL;
4498 +
4499 + return __addip(set, ip, skb->mac.ethernet->h_source, hash_ip);
4500 +}
4501 +
4502 +static inline int
4503 +__delip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
4504 +{
4505 + struct ip_set_macipmap *map =
4506 + (struct ip_set_macipmap *) set->data;
4507 + struct ip_set_macip *table =
4508 + (struct ip_set_macip *) map->members;
4509 +
4510 + if (ip < map->first_ip || ip > map->last_ip)
4511 + return -ERANGE;
4512 + if (!test_and_clear_bit(IPSET_MACIP_ISSET,
4513 + &table[ip - map->first_ip].flags))
4514 + return -EEXIST;
4515 +
4516 + *hash_ip = ip;
4517 + DP("%u.%u.%u.%u, %u.%u.%u.%u", HIPQUAD(ip), HIPQUAD(*hash_ip));
4518 + return 0;
4519 +}
4520 +
4521 +static int
4522 +delip(struct ip_set *set, const void *data, size_t size,
4523 + ip_set_ip_t *hash_ip)
4524 +{
4525 + struct ip_set_req_macipmap *req =
4526 + (struct ip_set_req_macipmap *) data;
4527 +
4528 + if (size != sizeof(struct ip_set_req_macipmap)) {
4529 + ip_set_printk("data length wrong (want %zu, have %zu)",
4530 + sizeof(struct ip_set_req_macipmap),
4531 + size);
4532 + return -EINVAL;
4533 + }
4534 + return __delip(set, req->ip, hash_ip);
4535 +}
4536 +
4537 +static int
4538 +delip_kernel(struct ip_set *set, const struct sk_buff *skb,
4539 + u_int32_t flags, ip_set_ip_t *hash_ip)
4540 +{
4541 + return __delip(set,
4542 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
4543 + : skb->nh.iph->daddr),
4544 + hash_ip);
4545 +}
4546 +
4547 +static inline size_t members_size(ip_set_id_t from, ip_set_id_t to)
4548 +{
4549 + return (size_t)((to - from + 1) * sizeof(struct ip_set_macip));
4550 +}
4551 +
4552 +static int create(struct ip_set *set, const void *data, size_t size)
4553 +{
4554 + int newbytes;
4555 + struct ip_set_req_macipmap_create *req =
4556 + (struct ip_set_req_macipmap_create *) data;
4557 + struct ip_set_macipmap *map;
4558 +
4559 + if (size != sizeof(struct ip_set_req_macipmap_create)) {
4560 + ip_set_printk("data length wrong (want %zu, have %zu)",
4561 + sizeof(struct ip_set_req_macipmap_create),
4562 + size);
4563 + return -EINVAL;
4564 + }
4565 +
4566 + DP("from %u.%u.%u.%u to %u.%u.%u.%u",
4567 + HIPQUAD(req->from), HIPQUAD(req->to));
4568 +
4569 + if (req->from > req->to) {
4570 + DP("bad ip range");
4571 + return -ENOEXEC;
4572 + }
4573 +
4574 + if (req->to - req->from > MAX_RANGE) {
4575 + ip_set_printk("range too big (max %d addresses)",
4576 + MAX_RANGE);
4577 + return -ENOEXEC;
4578 + }
4579 +
4580 + map = kmalloc(sizeof(struct ip_set_macipmap), GFP_KERNEL);
4581 + if (!map) {
4582 + DP("out of memory for %d bytes",
4583 + sizeof(struct ip_set_macipmap));
4584 + return -ENOMEM;
4585 + }
4586 + map->flags = req->flags;
4587 + map->first_ip = req->from;
4588 + map->last_ip = req->to;
4589 + newbytes = members_size(map->first_ip, map->last_ip);
4590 + map->members = ip_set_malloc(newbytes);
4591 + DP("members: %u %p", newbytes, map->members);
4592 + if (!map->members) {
4593 + DP("out of memory for %d bytes", newbytes);
4594 + kfree(map);
4595 + return -ENOMEM;
4596 + }
4597 + memset(map->members, 0, newbytes);
4598 +
4599 + set->data = map;
4600 + return 0;
4601 +}
4602 +
4603 +static void destroy(struct ip_set *set)
4604 +{
4605 + struct ip_set_macipmap *map =
4606 + (struct ip_set_macipmap *) set->data;
4607 +
4608 + ip_set_free(map->members, members_size(map->first_ip, map->last_ip));
4609 + kfree(map);
4610 +
4611 + set->data = NULL;
4612 +}
4613 +
4614 +static void flush(struct ip_set *set)
4615 +{
4616 + struct ip_set_macipmap *map =
4617 + (struct ip_set_macipmap *) set->data;
4618 + memset(map->members, 0, members_size(map->first_ip, map->last_ip));
4619 +}
4620 +
4621 +static void list_header(const struct ip_set *set, void *data)
4622 +{
4623 + struct ip_set_macipmap *map =
4624 + (struct ip_set_macipmap *) set->data;
4625 + struct ip_set_req_macipmap_create *header =
4626 + (struct ip_set_req_macipmap_create *) data;
4627 +
4628 + DP("list_header %x %x %u", map->first_ip, map->last_ip,
4629 + map->flags);
4630 +
4631 + header->from = map->first_ip;
4632 + header->to = map->last_ip;
4633 + header->flags = map->flags;
4634 +}
4635 +
4636 +static int list_members_size(const struct ip_set *set)
4637 +{
4638 + struct ip_set_macipmap *map =
4639 + (struct ip_set_macipmap *) set->data;
4640 +
4641 + DP("%u", members_size(map->first_ip, map->last_ip));
4642 + return members_size(map->first_ip, map->last_ip);
4643 +}
4644 +
4645 +static void list_members(const struct ip_set *set, void *data)
4646 +{
4647 + struct ip_set_macipmap *map =
4648 + (struct ip_set_macipmap *) set->data;
4649 +
4650 + int bytes = members_size(map->first_ip, map->last_ip);
4651 +
4652 + DP("members: %u %p", bytes, map->members);
4653 + memcpy(data, map->members, bytes);
4654 +}
4655 +
4656 +static struct ip_set_type ip_set_macipmap = {
4657 + .typename = SETTYPE_NAME,
4658 + .typecode = IPSET_TYPE_IP,
4659 + .protocol_version = IP_SET_PROTOCOL_VERSION,
4660 + .create = &create,
4661 + .destroy = &destroy,
4662 + .flush = &flush,
4663 + .reqsize = sizeof(struct ip_set_req_macipmap),
4664 + .addip = &addip,
4665 + .addip_kernel = &addip_kernel,
4666 + .delip = &delip,
4667 + .delip_kernel = &delip_kernel,
4668 + .testip = &testip,
4669 + .testip_kernel = &testip_kernel,
4670 + .header_size = sizeof(struct ip_set_req_macipmap_create),
4671 + .list_header = &list_header,
4672 + .list_members_size = &list_members_size,
4673 + .list_members = &list_members,
4674 + .me = THIS_MODULE,
4675 +};
4676 +
4677 +MODULE_LICENSE("GPL");
4678 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
4679 +MODULE_DESCRIPTION("macipmap type of IP sets");
4680 +
4681 +static int __init init(void)
4682 +{
4683 + return ip_set_register_set_type(&ip_set_macipmap);
4684 +}
4685 +
4686 +static void __exit fini(void)
4687 +{
4688 + /* FIXME: possible race with ip_set_create() */
4689 + ip_set_unregister_set_type(&ip_set_macipmap);
4690 +}
4691 +
4692 +module_init(init);
4693 +module_exit(fini);
4694 Index: linux-2.4.35.4/net/ipv4/netfilter/ip_set_nethash.c
4695 ===================================================================
4696 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
4697 +++ linux-2.4.35.4/net/ipv4/netfilter/ip_set_nethash.c 2007-12-15 05:20:07.900290454 +0100
4698 @@ -0,0 +1,450 @@
4699 +/* Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
4700 + *
4701 + * This program is free software; you can redistribute it and/or modify
4702 + * it under the terms of the GNU General Public License version 2 as
4703 + * published by the Free Software Foundation.
4704 + */
4705 +
4706 +/* Kernel module implementing a cidr nethash set */
4707 +
4708 +#include <linux/module.h>
4709 +#include <linux/ip.h>
4710 +#include <linux/skbuff.h>
4711 +#include <linux/netfilter_ipv4/ip_tables.h>
4712 +#include <linux/netfilter_ipv4/ip_set.h>
4713 +#include <linux/errno.h>
4714 +#include <asm/uaccess.h>
4715 +#include <asm/bitops.h>
4716 +#include <asm/softirq.h>
4717 +#include <linux/spinlock.h>
4718 +#include <linux/vmalloc.h>
4719 +#include <linux/random.h>
4720 +
4721 +#include <net/ip.h>
4722 +
4723 +#include <linux/netfilter_ipv4/ip_set_malloc.h>
4724 +#include <linux/netfilter_ipv4/ip_set_nethash.h>
4725 +#include <linux/netfilter_ipv4/ip_set_jhash.h>
4726 +#include <linux/netfilter_ipv4/ip_set_prime.h>
4727 +
4728 +static inline __u32
4729 +jhash_ip(const struct ip_set_nethash *map, ip_set_ip_t ip)
4730 +{
4731 + return jhash_1word(ip, map->initval);
4732 +}
4733 +
4734 +static inline __u32
4735 +randhash_ip(const struct ip_set_nethash *map, ip_set_ip_t ip)
4736 +{
4737 + return (1 + ip % map->prime);
4738 +}
4739 +
4740 +static inline __u32
4741 +hash_id_cidr(struct ip_set_nethash *map,
4742 + ip_set_ip_t ip,
4743 + unsigned char cidr,
4744 + ip_set_ip_t *hash_ip)
4745 +{
4746 + __u32 jhash, randhash, id;
4747 + u_int16_t i;
4748 +
4749 + *hash_ip = pack(ip, cidr);
4750 + jhash = jhash_ip(map, *hash_ip);
4751 + randhash = randhash_ip(map, *hash_ip);
4752 +
4753 + for (i = 0; i < map->probes; i++) {
4754 + id = (jhash + i * randhash) % map->hashsize;
4755 + DP("hash key: %u", id);
4756 + if (map->members[id] == *hash_ip)
4757 + return id;
4758 + }
4759 + return UINT_MAX;
4760 +}
4761 +
4762 +static inline __u32
4763 +hash_id(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
4764 +{
4765 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
4766 + __u32 id = UINT_MAX;
4767 + int i;
4768 +
4769 + for (i = 0; i < 30 && map->cidr[i]; i++) {
4770 + id = hash_id_cidr(map, ip, map->cidr[i], hash_ip);
4771 + if (id != UINT_MAX)
4772 + break;
4773 + }
4774 + return id;
4775 +}
4776 +
4777 +static inline int
4778 +__testip_cidr(struct ip_set *set, ip_set_ip_t ip, unsigned char cidr,
4779 + ip_set_ip_t *hash_ip)
4780 +{
4781 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
4782 +
4783 + return (hash_id_cidr(map, ip, cidr, hash_ip) != UINT_MAX);
4784 +}
4785 +
4786 +static inline int
4787 +__testip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
4788 +{
4789 + return (hash_id(set, ip, hash_ip) != UINT_MAX);
4790 +}
4791 +
4792 +static int
4793 +testip(struct ip_set *set, const void *data, size_t size,
4794 + ip_set_ip_t *hash_ip)
4795 +{
4796 + struct ip_set_req_nethash *req =
4797 + (struct ip_set_req_nethash *) data;
4798 +
4799 + if (size != sizeof(struct ip_set_req_nethash)) {
4800 + ip_set_printk("data length wrong (want %zu, have %zu)",
4801 + sizeof(struct ip_set_req_nethash),
4802 + size);
4803 + return -EINVAL;
4804 + }
4805 + return (req->cidr == 32 ? __testip(set, req->ip, hash_ip)
4806 + : __testip_cidr(set, req->ip, req->cidr, hash_ip));
4807 +}
4808 +
4809 +static int
4810 +testip_kernel(struct ip_set *set, const struct sk_buff *skb,
4811 + u_int32_t flags, ip_set_ip_t *hash_ip)
4812 +{
4813 + return __testip(set,
4814 + ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
4815 + : skb->nh.iph->daddr),
4816 + hash_ip);
4817 +}
4818 +
4819 +static inline int
4820 +__addip_base(struct ip_set_nethash *map, ip_set_ip_t ip)
4821 +{
4822 + __u32 jhash, randhash, probe;
4823 + u_int16_t i;
4824 +
4825 + jhash = jhash_ip(map, ip);
4826 + randhash = randhash_ip(map, ip);
4827 +
4828 + for (i = 0; i < map->probes; i++) {
4829 + probe = (jhash + i * randhash) % map->hashsize;
4830 + if (map->members[probe] == ip)
4831 + return -EEXIST;
4832 + if (!map->members[probe]) {
4833 + map->members[probe] = ip;
4834 + return 0;
4835 + }
4836 + }
4837 + /* Trigger rehashing */
4838 + return -EAGAIN;
4839 +}
4840 +
4841 +static inline int
4842 +__addip(struct ip_set_nethash *map, ip_set_ip_t ip, unsigned char cidr,
4843 + ip_set_ip_t *hash_ip)
4844 +{
4845 + *hash_ip = pack(ip, cidr);
4846 + DP("%u.%u.%u.%u/%u, %u.%u.%u.%u", HIPQUAD(ip), cidr, HIPQUAD(*hash_ip));
4847 +
4848 + return __addip_base(map, *hash_ip);
4849 +}
4850 +
4851 +static void
4852 +update_cidr_sizes(struct ip_set_nethash *map, unsigned char cidr)
4853 +{
4854 + unsigned char next;
4855 + int i;
4856 +
4857 + for (i = 0; i < 30 && map->cidr[i]; i++) {
4858 + if (map->cidr[i] == cidr) {
4859 + return;
4860 + } else if (map->cidr[i] < cidr) {
4861 + next = map->cidr[i];
4862 + map->cidr[i] = cidr;
4863 + cidr = next;
4864 + }
4865 + }
4866 + if (i < 30)
4867 + map->cidr[i] = cidr;
4868 +}
4869 +
4870 +static int
4871 +addip(struct ip_set *set, const void *data, size_t size,
4872 + ip_set_ip_t *hash_ip)
4873 +{
4874 + struct ip_set_req_nethash *req =
4875 + (struct ip_set_req_nethash *) data;
4876 + int ret;
4877 +
4878 + if (size != sizeof(struct ip_set_req_nethash)) {
4879 + ip_set_printk("data length wrong (want %zu, have %zu)",
4880 + sizeof(struct ip_set_req_nethash),
4881 + size);
4882 + return -EINVAL;
4883 + }
4884 + ret = __addip((struct ip_set_nethash *) set->data,
4885 + req->ip, req->cidr, hash_ip);
4886 +
4887 + if (ret == 0)
4888 + update_cidr_sizes((struct ip_set_nethash *) set->data,
4889 + req->cidr);
4890 +
4891 + return ret;
4892 +}
4893 +
4894 +static int
4895 +addip_kernel(struct ip_set *set, const struct sk_buff *skb,
4896 + u_int32_t flags, ip_set_ip_t *hash_ip)
4897 +{
4898 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
4899 + int ret = -ERANGE;
4900 + ip_set_ip_t ip = ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
4901 + : skb->nh.iph->daddr);
4902 +
4903 + if (map->cidr[0])
4904 + ret = __addip(map, ip, map->cidr[0], hash_ip);
4905 +
4906 + return ret;
4907 +}
4908 +
4909 +static int retry(struct ip_set *set)
4910 +{
4911 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
4912 + ip_set_ip_t *members;
4913 + u_int32_t i, hashsize;
4914 + unsigned newbytes;
4915 + int res;
4916 + struct ip_set_nethash tmp = {
4917 + .hashsize = map->hashsize,
4918 + .probes = map->probes,
4919 + .resize = map->resize
4920 + };
4921 +
4922 + if (map->resize == 0)
4923 + return -ERANGE;
4924 +
4925 + memcpy(tmp.cidr, map->cidr, 30 * sizeof(unsigned char));
4926 + again:
4927 + res = 0;
4928 +
4929 + /* Calculate new parameters */
4930 + get_random_bytes(&tmp.initval, 4);
4931 + hashsize = tmp.hashsize + (tmp.hashsize * map->resize)/100;
4932 + if (hashsize == tmp.hashsize)
4933 + hashsize++;
4934 + tmp.prime = make_prime(hashsize);
4935 +
4936 + ip_set_printk("rehashing of set %s triggered: "
4937 + "hashsize grows from %u to %u",
4938 + set->name, tmp.hashsize, hashsize);
4939 + tmp.hashsize = hashsize;
4940 +
4941 + newbytes = hashsize * sizeof(ip_set_ip_t);
4942 + tmp.members = ip_set_malloc(newbytes);
4943 + if (!tmp.members) {
4944 + DP("out of memory for %d bytes", newbytes);
4945 + return -ENOMEM;
4946 + }
4947 + memset(tmp.members, 0, newbytes);
4948 +
4949 + write_lock_bh(&set->lock);
4950 + map = (struct ip_set_nethash *) set->data; /* Play safe */
4951 + for (i = 0; i < map->hashsize && res == 0; i++) {
4952 + if (map->members[i])
4953 + res = __addip_base(&tmp, map->members[i]);
4954 + }
4955 + if (res) {
4956 + /* Failure, try again */
4957 + write_unlock_bh(&set->lock);
4958 + ip_set_free(tmp.members, newbytes);
4959 + goto again;
4960 + }
4961 +
4962 + /* Success at resizing! */
4963 + members = map->members;
4964 + hashsize = map->hashsize;
4965 +
4966 + map->initval = tmp.initval;
4967 + map->prime = tmp.prime;
4968 + map->hashsize = tmp.hashsize;
4969 + map->members = tmp.members;
4970 + write_unlock_bh(&set->lock);
4971 +
4972 + ip_set_free(members, hashsize * sizeof(ip_set_ip_t));
4973 +
4974 + return 0;
4975 +}
4976 +
4977 +static inline int
4978 +__delip(struct ip_set_nethash *map, ip_set_ip_t ip, unsigned char cidr,
4979 + ip_set_ip_t *hash_ip)
4980 +{
4981 + ip_set_ip_t id = hash_id_cidr(map, ip, cidr, hash_ip);
4982 +
4983 + if (id == UINT_MAX)
4984 + return -EEXIST;
4985 +
4986 + map->members[id] = 0;
4987 + return 0;
4988 +}
4989 +
4990 +static int
4991 +delip(struct ip_set *set, const void *data, size_t size,
4992 + ip_set_ip_t *hash_ip)
4993 +{
4994 + struct ip_set_req_nethash *req =
4995 + (struct ip_set_req_nethash *) data;
4996 +
4997 + if (size != sizeof(struct ip_set_req_nethash)) {
4998 + ip_set_printk("data length wrong (want %zu, have %zu)",
4999 + sizeof(struct ip_set_req_nethash),
5000 + size);
5001 + return -EINVAL;
5002 + }
5003 + /* TODO: no garbage collection in map->cidr */
5004 + return __delip((struct ip_set_nethash *) set->data,
5005 + req->ip, req->cidr, hash_ip);
5006 +}
5007 +
5008 +static int
5009 +delip_kernel(struct ip_set *set, const struct sk_buff *skb,
5010 + u_int32_t flags, ip_set_ip_t *hash_ip)
5011 +{
5012 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
5013 + int ret = -ERANGE;
5014 + ip_set_ip_t ip = ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
5015 + : skb->nh.iph->daddr);
5016 +
5017 + if (map->cidr[0])
5018 + ret = __delip(map, ip, map->cidr[0], hash_ip);
5019 +
5020 + return ret;
5021 +}
5022 +
5023 +static int create(struct ip_set *set, const void *data, size_t size)
5024 +{
5025 + unsigned newbytes;
5026 + struct ip_set_req_nethash_create *req =
5027 + (struct ip_set_req_nethash_create *) data;
5028 + struct ip_set_nethash *map;
5029 +
5030 + if (size != sizeof(struct ip_set_req_nethash_create)) {
5031 + ip_set_printk("data length wrong (want %zu, have %zu)",
5032 + sizeof(struct ip_set_req_nethash_create),
5033 + size);
5034 + return -EINVAL;
5035 + }
5036 +
5037 + if (req->hashsize < 1) {
5038 + ip_set_printk("hashsize too small");
5039 + return -ENOEXEC;
5040 + }
5041 +
5042 + map = kmalloc(sizeof(struct ip_set_nethash), GFP_KERNEL);
5043 + if (!map) {
5044 + DP("out of memory for %d bytes",
5045 + sizeof(struct ip_set_nethash));
5046 + return -ENOMEM;
5047 + }
5048 + get_random_bytes(&map->initval, 4);
5049 + map->prime = make_prime(req->hashsize);
5050 + map->hashsize = req->hashsize;
5051 + map->probes = req->probes;
5052 + map->resize = req->resize;
5053 + memset(map->cidr, 0, 30 * sizeof(unsigned char));
5054 + newbytes = map->hashsize * sizeof(ip_set_ip_t);
5055 + map->members = ip_set_malloc(newbytes);
5056 + if (!map->members) {
5057 + DP("out of memory for %d bytes", newbytes);
5058 + kfree(map);
5059 + return -ENOMEM;
5060 + }
5061 + memset(map->members, 0, newbytes);
5062 +
5063 + set->data = map;
5064 + return 0;
5065 +}
5066 +
5067 +static void destroy(struct ip_set *set)
5068 +{
5069 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
5070 +
5071 + ip_set_free(map->members, map->hashsize * sizeof(ip_set_ip_t));
5072 + kfree(map);
5073 +
5074 + set->data = NULL;
5075 +}
5076 +
5077 +static void flush(struct ip_set *set)
5078 +{
5079 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
5080 + memset(map->members, 0, map->hashsize * sizeof(ip_set_ip_t));
5081 + memset(map->cidr, 0, 30 * sizeof(unsigned char));
5082 +}
5083 +
5084 +static void list_header(const struct ip_set *set, void *data)
5085 +{
5086 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
5087 + struct ip_set_req_nethash_create *header =
5088 + (struct ip_set_req_nethash_create *) data;
5089 +
5090 + header->hashsize = map->hashsize;
5091 + header->probes = map->probes;
5092 + header->resize = map->resize;
5093 +}
5094 +
5095 +static int list_members_size(const struct ip_set *set)
5096 +{
5097 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
5098 +
5099 + return (map->hashsize * sizeof(ip_set_ip_t));
5100 +}
5101 +
5102 +static void list_members(const struct ip_set *set, void *data)
5103 +{
5104 + struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
5105 + int bytes = map->hashsize * sizeof(ip_set_ip_t);
5106 +
5107 + memcpy(data, map->members, bytes);
5108 +}
5109 +
5110 +static struct ip_set_type ip_set_nethash = {
5111 + .typename = SETTYPE_NAME,
5112 + .typecode = IPSET_TYPE_IP,
5113 + .protocol_version = IP_SET_PROTOCOL_VERSION,
5114 + .create = &create,
5115 + .destroy = &destroy,
5116 + .flush = &flush,
5117 + .reqsize = sizeof(struct ip_set_req_nethash),
5118 + .addip = &addip,
5119 + .addip_kernel = &addip_kernel,
5120 + .retry = &retry,
5121 + .delip = &delip,
5122 + .delip_kernel = &delip_kernel,
5123 + .testip = &testip,
5124 + .testip_kernel = &testip_kernel,
5125 + .header_size = sizeof(struct ip_set_req_nethash_create),
5126 + .list_header = &list_header,
5127 + .list_members_size = &list_members_size,
5128 + .list_members = &list_members,
5129 + .me = THIS_MODULE,
5130 +};
5131 +
5132 +MODULE_LICENSE("GPL");
5133 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
5134 +MODULE_DESCRIPTION("nethash type of IP sets");
5135 +
5136 +static int __init init(void)
5137 +{
5138 + return ip_set_register_set_type(&ip_set_nethash);
5139 +}
5140 +
5141 +static void __exit fini(void)
5142 +{
5143 + /* FIXME: possible race with ip_set_create() */
5144 + ip_set_unregister_set_type(&ip_set_nethash);
5145 +}
5146 +
5147 +module_init(init);
5148 +module_exit(fini);
5149 Index: linux-2.4.35.4/net/ipv4/netfilter/ip_set_portmap.c
5150 ===================================================================
5151 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
5152 +++ linux-2.4.35.4/net/ipv4/netfilter/ip_set_portmap.c 2007-12-15 05:20:07.900290454 +0100
5153 @@ -0,0 +1,321 @@
5154 +/* Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
5155 + *
5156 + * This program is free software; you can redistribute it and/or modify
5157 + * it under the terms of the GNU General Public License version 2 as
5158 + * published by the Free Software Foundation.
5159 + */
5160 +
5161 +/* Kernel module implementing a port set type as a bitmap */
5162 +
5163 +#include <linux/module.h>
5164 +#include <linux/ip.h>
5165 +#include <linux/tcp.h>
5166 +#include <linux/udp.h>
5167 +#include <linux/skbuff.h>
5168 +#include <linux/netfilter_ipv4/ip_tables.h>
5169 +#include <linux/netfilter_ipv4/ip_set.h>
5170 +#include <linux/errno.h>
5171 +#include <asm/uaccess.h>
5172 +#include <asm/bitops.h>
5173 +#include <asm/softirq.h>
5174 +#include <linux/spinlock.h>
5175 +
5176 +#include <net/ip.h>
5177 +
5178 +#include <linux/netfilter_ipv4/ip_set_portmap.h>
5179 +
5180 +static inline ip_set_ip_t
5181 +get_port(const struct sk_buff *skb, u_int32_t flags)
5182 +{
5183 + struct iphdr *iph = skb->nh.iph;
5184 + u_int16_t offset = ntohs(iph->frag_off) & IP_OFFSET;
5185 +
5186 + switch (iph->protocol) {
5187 + case IPPROTO_TCP: {
5188 + struct tcphdr *tcph = (struct tcphdr *)((u_int32_t *)iph + iph->ihl);
5189 +
5190 + /* See comments at tcp_match in ip_tables.c */
5191 + if (offset != 0
5192 + || (offset == 0
5193 + && (skb->len - iph->ihl * 4) < sizeof(struct tcphdr)))
5194 + return INVALID_PORT;
5195 +
5196 + return ntohs(flags & IPSET_SRC ?
5197 + tcph->source : tcph->dest);
5198 + }
5199 + case IPPROTO_UDP: {
5200 + struct udphdr *udph = (struct udphdr *)((u_int32_t *)iph + iph->ihl);
5201 +
5202 + if (offset != 0
5203 + || (offset == 0
5204 + && (skb->len - iph->ihl * 4) < sizeof(struct udphdr)))
5205 + return INVALID_PORT;
5206 +
5207 + return ntohs(flags & IPSET_SRC ?
5208 + udph->source : udph->dest);
5209 + }
5210 + default:
5211 + return INVALID_PORT;
5212 + }
5213 +}
5214 +
5215 +static inline int
5216 +__testport(struct ip_set *set, ip_set_ip_t port, ip_set_ip_t *hash_port)
5217 +{
5218 + struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
5219 +
5220 + if (port < map->first_port || port > map->last_port)
5221 + return -ERANGE;
5222 +
5223 + *hash_port = port;
5224 + DP("set: %s, port:%u, %u", set->name, port, *hash_port);
5225 + return !!test_bit(port - map->first_port, map->members);
5226 +}
5227 +
5228 +static int
5229 +testport(struct ip_set *set, const void *data, size_t size,
5230 + ip_set_ip_t *hash_port)
5231 +{
5232 + struct ip_set_req_portmap *req =
5233 + (struct ip_set_req_portmap *) data;
5234 +
5235 + if (size != sizeof(struct ip_set_req_portmap)) {
5236 + ip_set_printk("data length wrong (want %zu, have %zu)",
5237 + sizeof(struct ip_set_req_portmap),
5238 + size);
5239 + return -EINVAL;
5240 + }
5241 + return __testport(set, req->port, hash_port);
5242 +}
5243 +
5244 +static int
5245 +testport_kernel(struct ip_set *set, const struct sk_buff *skb,
5246 + u_int32_t flags, ip_set_ip_t *hash_port)
5247 +{
5248 + int res;
5249 + ip_set_ip_t port = get_port(skb, flags);
5250 +
5251 + DP("flag %s port %u", flags & IPSET_SRC ? "SRC" : "DST", port);
5252 + if (port == INVALID_PORT)
5253 + return 0;
5254 +
5255 + res = __testport(set, port, hash_port);
5256 +
5257 + return (res < 0 ? 0 : res);
5258 +}
5259 +
5260 +static inline int
5261 +__addport(struct ip_set *set, ip_set_ip_t port, ip_set_ip_t *hash_port)
5262 +{
5263 + struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
5264 +
5265 + if (port < map->first_port || port > map->last_port)
5266 + return -ERANGE;
5267 + if (test_and_set_bit(port - map->first_port, map->members))
5268 + return -EEXIST;
5269 +
5270 + *hash_port = port;
5271 + DP("port %u", port);
5272 + return 0;
5273 +}
5274 +
5275 +static int
5276 +addport(struct ip_set *set, const void *data, size_t size,
5277 + ip_set_ip_t *hash_port)
5278 +{
5279 + struct ip_set_req_portmap *req =
5280 + (struct ip_set_req_portmap *) data;
5281 +
5282 + if (size != sizeof(struct ip_set_req_portmap)) {
5283 + ip_set_printk("data length wrong (want %zu, have %zu)",
5284 + sizeof(struct ip_set_req_portmap),
5285 + size);
5286 + return -EINVAL;
5287 + }
5288 + return __addport(set, req->port, hash_port);
5289 +}
5290 +
5291 +static int
5292 +addport_kernel(struct ip_set *set, const struct sk_buff *skb,
5293 + u_int32_t flags, ip_set_ip_t *hash_port)
5294 +{
5295 + ip_set_ip_t port = get_port(skb, flags);
5296 +
5297 + if (port == INVALID_PORT)
5298 + return -EINVAL;
5299 +
5300 + return __addport(set, port, hash_port);
5301 +}
5302 +
5303 +static inline int
5304 +__delport(struct ip_set *set, ip_set_ip_t port, ip_set_ip_t *hash_port)
5305 +{
5306 + struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
5307 +
5308 + if (port < map->first_port || port > map->last_port)
5309 + return -ERANGE;
5310 + if (!test_and_clear_bit(port - map->first_port, map->members))
5311 + return -EEXIST;
5312 +
5313 + *hash_port = port;
5314 + DP("port %u", port);
5315 + return 0;
5316 +}
5317 +
5318 +static int
5319 +delport(struct ip_set *set, const void *data, size_t size,
5320 + ip_set_ip_t *hash_port)
5321 +{
5322 + struct ip_set_req_portmap *req =
5323 + (struct ip_set_req_portmap *) data;
5324 +
5325 + if (size != sizeof(struct ip_set_req_portmap)) {
5326 + ip_set_printk("data length wrong (want %zu, have %zu)",
5327 + sizeof(struct ip_set_req_portmap),
5328 + size);
5329 + return -EINVAL;
5330 + }
5331 + return __delport(set, req->port, hash_port);
5332 +}
5333 +
5334 +static int
5335 +delport_kernel(struct ip_set *set, const struct sk_buff *skb,
5336 + u_int32_t flags, ip_set_ip_t *hash_port)
5337 +{
5338 + ip_set_ip_t port = get_port(skb, flags);
5339 +
5340 + if (port == INVALID_PORT)
5341 + return -EINVAL;
5342 +
5343 + return __delport(set, port, hash_port);
5344 +}
5345 +
5346 +static int create(struct ip_set *set, const void *data, size_t size)
5347 +{
5348 + int newbytes;
5349 + struct ip_set_req_portmap_create *req =
5350 + (struct ip_set_req_portmap_create *) data;
5351 + struct ip_set_portmap *map;
5352 +
5353 + if (size != sizeof(struct ip_set_req_portmap_create)) {
5354 + ip_set_printk("data length wrong (want %zu, have %zu)",
5355 + sizeof(struct ip_set_req_portmap_create),
5356 + size);
5357 + return -EINVAL;
5358 + }
5359 +
5360 + DP("from %u to %u", req->from, req->to);
5361 +
5362 + if (req->from > req->to) {
5363 + DP("bad port range");
5364 + return -ENOEXEC;
5365 + }
5366 +
5367 + if (req->to - req->from > MAX_RANGE) {
5368 + ip_set_printk("range too big (max %d ports)",
5369 + MAX_RANGE);
5370 + return -ENOEXEC;
5371 + }
5372 +
5373 + map = kmalloc(sizeof(struct ip_set_portmap), GFP_KERNEL);
5374 + if (!map) {
5375 + DP("out of memory for %d bytes",
5376 + sizeof(struct ip_set_portmap));
5377 + return -ENOMEM;
5378 + }
5379 + map->first_port = req->from;
5380 + map->last_port = req->to;
5381 + newbytes = bitmap_bytes(req->from, req->to);
5382 + map->members = kmalloc(newbytes, GFP_KERNEL);
5383 + if (!map->members) {
5384 + DP("out of memory for %d bytes", newbytes);
5385 + kfree(map);
5386 + return -ENOMEM;
5387 + }
5388 + memset(map->members, 0, newbytes);
5389 +
5390 + set->data = map;
5391 + return 0;
5392 +}
5393 +
5394 +static void destroy(struct ip_set *set)
5395 +{
5396 + struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
5397 +
5398 + kfree(map->members);
5399 + kfree(map);
5400 +
5401 + set->data = NULL;
5402 +}
5403 +
5404 +static void flush(struct ip_set *set)
5405 +{
5406 + struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
5407 + memset(map->members, 0, bitmap_bytes(map->first_port, map->last_port));
5408 +}
5409 +
5410 +static void list_header(const struct ip_set *set, void *data)
5411 +{
5412 + struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
5413 + struct ip_set_req_portmap_create *header =
5414 + (struct ip_set_req_portmap_create *) data;
5415 +
5416 + DP("list_header %u %u", map->first_port, map->last_port);
5417 +
5418 + header->from = map->first_port;
5419 + header->to = map->last_port;
5420 +}
5421 +
5422 +static int list_members_size(const struct ip_set *set)
5423 +{
5424 + struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
5425 +
5426 + return bitmap_bytes(map->first_port, map->last_port);
5427 +}
5428 +
5429 +static void list_members(const struct ip_set *set, void *data)
5430 +{
5431 + struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
5432 + int bytes = bitmap_bytes(map->first_port, map->last_port);
5433 +
5434 + memcpy(data, map->members, bytes);
5435 +}
5436 +
5437 +static struct ip_set_type ip_set_portmap = {
5438 + .typename = SETTYPE_NAME,
5439 + .typecode = IPSET_TYPE_PORT,
5440 + .protocol_version = IP_SET_PROTOCOL_VERSION,
5441 + .create = &create,
5442 + .destroy = &destroy,
5443 + .flush = &flush,
5444 + .reqsize = sizeof(struct ip_set_req_portmap),
5445 + .addip = &addport,
5446 + .addip_kernel = &addport_kernel,
5447 + .delip = &delport,
5448 + .delip_kernel = &delport_kernel,
5449 + .testip = &testport,
5450 + .testip_kernel = &testport_kernel,
5451 + .header_size = sizeof(struct ip_set_req_portmap_create),
5452 + .list_header = &list_header,
5453 + .list_members_size = &list_members_size,
5454 + .list_members = &list_members,
5455 + .me = THIS_MODULE,
5456 +};
5457 +
5458 +MODULE_LICENSE("GPL");
5459 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
5460 +MODULE_DESCRIPTION("portmap type of IP sets");
5461 +
5462 +static int __init init(void)
5463 +{
5464 + return ip_set_register_set_type(&ip_set_portmap);
5465 +}
5466 +
5467 +static void __exit fini(void)
5468 +{
5469 + /* FIXME: possible race with ip_set_create() */
5470 + ip_set_unregister_set_type(&ip_set_portmap);
5471 +}
5472 +
5473 +module_init(init);
5474 +module_exit(fini);
5475 Index: linux-2.4.35.4/net/ipv4/netfilter/ipt_set.c
5476 ===================================================================
5477 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
5478 +++ linux-2.4.35.4/net/ipv4/netfilter/ipt_set.c 2007-12-15 05:20:07.900290454 +0100
5479 @@ -0,0 +1,114 @@
5480 +/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
5481 + * Patrick Schaaf <bof@bof.de>
5482 + * Martin Josefsson <gandalf@wlug.westbo.se>
5483 + * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
5484 + *
5485 + * This program is free software; you can redistribute it and/or modify
5486 + * it under the terms of the GNU General Public License version 2 as
5487 + * published by the Free Software Foundation.
5488 + */
5489 +
5490 +/* Kernel module to match an IP set. */
5491 +
5492 +#include <linux/module.h>
5493 +#include <linux/ip.h>
5494 +#include <linux/skbuff.h>
5495 +
5496 +#include <linux/netfilter_ipv4/ip_tables.h>
5497 +#include <linux/netfilter_ipv4/ip_set.h>
5498 +#include <linux/netfilter_ipv4/ipt_set.h>
5499 +
5500 +static inline int
5501 +match_set(const struct ipt_set_info *info,
5502 + const struct sk_buff *skb,
5503 + int inv)
5504 +{
5505 + if (ip_set_testip_kernel(info->index, skb, info->flags))
5506 + inv = !inv;
5507 + return inv;
5508 +}
5509 +
5510 +static int
5511 +match(const struct sk_buff *skb,
5512 + const struct net_device *in,
5513 + const struct net_device *out,
5514 + const void *matchinfo,
5515 + int offset,
5516 + const void *hdr,
5517 + u_int16_t datalen,
5518 + int *hotdrop)
5519 +{
5520 + const struct ipt_set_info_match *info = matchinfo;
5521 +
5522 + return match_set(&info->match_set,
5523 + skb,
5524 + info->match_set.flags[0] & IPSET_MATCH_INV);
5525 +}
5526 +
5527 +static int
5528 +checkentry(const char *tablename,
5529 + const struct ipt_ip *ip,
5530 + void *matchinfo,
5531 + unsigned int matchsize,
5532 + unsigned int hook_mask)
5533 +{
5534 + struct ipt_set_info_match *info =
5535 + (struct ipt_set_info_match *) matchinfo;
5536 + ip_set_id_t index;
5537 +
5538 + if (matchsize != IPT_ALIGN(sizeof(struct ipt_set_info_match))) {
5539 + ip_set_printk("invalid matchsize %d", matchsize);
5540 + return 0;
5541 + }
5542 +
5543 + index = ip_set_get_byindex(info->match_set.index);
5544 +
5545 + if (index == IP_SET_INVALID_ID) {
5546 + ip_set_printk("Cannot find set indentified by id %u to match",
5547 + info->match_set.index);
5548 + return 0; /* error */
5549 + }
5550 + if (info->match_set.flags[IP_SET_MAX_BINDINGS] != 0) {
5551 + ip_set_printk("That's nasty!");
5552 + return 0; /* error */
5553 + }
5554 +
5555 + return 1;
5556 +}
5557 +
5558 +static void destroy(void *matchinfo, unsigned int matchsize)
5559 +{
5560 + struct ipt_set_info_match *info = matchinfo;
5561 +
5562 + if (matchsize != IPT_ALIGN(sizeof(struct ipt_set_info_match))) {
5563 + ip_set_printk("invalid matchsize %d", matchsize);
5564 + return;
5565 + }
5566 +
5567 + ip_set_put(info->match_set.index);
5568 +}
5569 +
5570 +static struct ipt_match set_match = {
5571 + .name = "set",
5572 + .match = &match,
5573 + .checkentry = &checkentry,
5574 + .destroy = &destroy,
5575 + .me = THIS_MODULE
5576 +};
5577 +
5578 +MODULE_LICENSE("GPL");
5579 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
5580 +MODULE_DESCRIPTION("iptables IP set match module");
5581 +
5582 +static int __init init(void)
5583 +{
5584 + return ipt_register_match(&set_match);
5585 +}
5586 +
5587 +static void __exit fini(void)
5588 +{
5589 + ipt_unregister_match(&set_match);
5590 +}
5591 +
5592 +module_init(init);
5593 +module_exit(fini);
5594 Index: linux-2.4.35.4/net/ipv4/netfilter/ipt_SET.c
5595 ===================================================================
5596 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
5597 +++ linux-2.4.35.4/net/ipv4/netfilter/ipt_SET.c 2007-12-15 05:20:07.900290454 +0100
5598 @@ -0,0 +1,127 @@
5599 +/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
5600 + * Patrick Schaaf <bof@bof.de>
5601 + * Martin Josefsson <gandalf@wlug.westbo.se>
5602 + * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
5603 + *
5604 + * This program is free software; you can redistribute it and/or modify
5605 + * it under the terms of the GNU General Public License version 2 as
5606 + * published by the Free Software Foundation.
5607 + */
5608 +
5609 +/* ipt_SET.c - netfilter target to manipulate IP sets */
5610 +
5611 +#include <linux/types.h>
5612 +#include <linux/ip.h>
5613 +#include <linux/timer.h>
5614 +#include <linux/module.h>
5615 +#include <linux/netfilter.h>
5616 +#include <linux/netdevice.h>
5617 +#include <linux/if.h>
5618 +#include <linux/inetdevice.h>
5619 +#include <net/protocol.h>
5620 +#include <net/checksum.h>
5621 +#include <linux/netfilter_ipv4.h>
5622 +#include <linux/netfilter_ipv4/ip_nat_rule.h>
5623 +#include <linux/netfilter_ipv4/ipt_set.h>
5624 +
5625 +static unsigned int
5626 +target(struct sk_buff **pskb,
5627 + unsigned int hooknum,
5628 + const struct net_device *in,
5629 + const struct net_device *out,
5630 + const void *targinfo,
5631 + void *userinfo)
5632 +{
5633 + const struct ipt_set_info_target *info = targinfo;
5634 +
5635 + if (info->add_set.index != IP_SET_INVALID_ID)
5636 + ip_set_addip_kernel(info->add_set.index,
5637 + *pskb,
5638 + info->add_set.flags);
5639 + if (info->del_set.index != IP_SET_INVALID_ID)
5640 + ip_set_delip_kernel(info->del_set.index,
5641 + *pskb,
5642 + info->del_set.flags);
5643 +
5644 + return IPT_CONTINUE;
5645 +}
5646 +
5647 +static int
5648 +checkentry(const char *tablename,
5649 + const struct ipt_entry *e,
5650 + void *targinfo,
5651 + unsigned int targinfosize, unsigned int hook_mask)
5652 +{
5653 + struct ipt_set_info_target *info =
5654 + (struct ipt_set_info_target *) targinfo;
5655 + ip_set_id_t index;
5656 +
5657 + if (targinfosize != IPT_ALIGN(sizeof(*info))) {
5658 + DP("bad target info size %u", targinfosize);
5659 + return 0;
5660 + }
5661 +
5662 + if (info->add_set.index != IP_SET_INVALID_ID) {
5663 + index = ip_set_get_byindex(info->add_set.index);
5664 + if (index == IP_SET_INVALID_ID) {
5665 + ip_set_printk("cannot find add_set index %u as target",
5666 + info->add_set.index);
5667 + return 0; /* error */
5668 + }
5669 + }
5670 +
5671 + if (info->del_set.index != IP_SET_INVALID_ID) {
5672 + index = ip_set_get_byindex(info->del_set.index);
5673 + if (index == IP_SET_INVALID_ID) {
5674 + ip_set_printk("cannot find del_set index %u as target",
5675 + info->del_set.index);
5676 + return 0; /* error */
5677 + }
5678 + }
5679 + if (info->add_set.flags[IP_SET_MAX_BINDINGS] != 0
5680 + || info->del_set.flags[IP_SET_MAX_BINDINGS] != 0) {
5681 + ip_set_printk("That's nasty!");
5682 + return 0; /* error */
5683 + }
5684 + return 1;
5685 +}
5686 +
5687 +static void destroy(void *targetinfo, unsigned int targetsize)
5688 +{
5689 + struct ipt_set_info_target *info = targetinfo;
5690 +
5691 + if (targetsize != IPT_ALIGN(sizeof(struct ipt_set_info_target))) {
5692 + ip_set_printk("invalid targetsize %d", targetsize);
5693 + return;
5694 + }
5695 +
5696 + if (info->add_set.index != IP_SET_INVALID_ID)
5697 + ip_set_put(info->add_set.index);
5698 + if (info->del_set.index != IP_SET_INVALID_ID)
5699 + ip_set_put(info->del_set.index);
5700 +}
5701 +
5702 +static struct ipt_target SET_target = {
5703 + .name = "SET",
5704 + .target = target,
5705 + .checkentry = checkentry,
5706 + .destroy = destroy,
5707 + .me = THIS_MODULE
5708 +};
5709 +
5710 +MODULE_LICENSE("GPL");
5711 +MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
5712 +MODULE_DESCRIPTION("iptables IP set target module");
5713 +
5714 +static int __init init(void)
5715 +{
5716 + return ipt_register_target(&SET_target);
5717 +}
5718 +
5719 +static void __exit fini(void)
5720 +{
5721 + ipt_unregister_target(&SET_target);
5722 +}
5723 +
5724 +module_init(init);
5725 +module_exit(fini);
5726 Index: linux-2.4.35.4/net/ipv4/netfilter/Makefile
5727 ===================================================================
5728 --- linux-2.4.35.4.orig/net/ipv4/netfilter/Makefile 2007-12-15 05:20:07.568271536 +0100
5729 +++ linux-2.4.35.4/net/ipv4/netfilter/Makefile 2007-12-15 05:20:07.900290454 +0100
5730 @@ -75,6 +75,18 @@
5731 obj-$(CONFIG_IP_NF_MATCH_HELPER) += ipt_helper.o
5732 obj-$(CONFIG_IP_NF_MATCH_LIMIT) += ipt_limit.o
5733 obj-$(CONFIG_IP_NF_MATCH_MARK) += ipt_mark.o
5734 +obj-$(CONFIG_IP_NF_MATCH_SET) += ipt_set.o
5735 +obj-$(CONFIG_IP_NF_TARGET_SET) += ipt_SET.o
5736 +ifdef CONFIG_IP_NF_SET
5737 + obj-$(CONFIG_IP_NF_SET) += ip_set.o
5738 + export-objs += ip_set.o
5739 +endif
5740 +obj-$(CONFIG_IP_NF_SET_IPMAP) += ip_set_ipmap.o
5741 +obj-$(CONFIG_IP_NF_SET_PORTMAP) += ip_set_portmap.o
5742 +obj-$(CONFIG_IP_NF_SET_MACIPMAP) += ip_set_macipmap.o
5743 +obj-$(CONFIG_IP_NF_SET_IPHASH) += ip_set_iphash.o
5744 +obj-$(CONFIG_IP_NF_SET_NETHASH) += ip_set_nethash.o
5745 +obj-$(CONFIG_IP_NF_SET_IPTREE) += ip_set_iptree.o
5746 obj-$(CONFIG_IP_NF_MATCH_MAC) += ipt_mac.o
5747 obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
5748
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