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1da177e4 LT |
1 | /* |
2 | * ip_vs_app.c: Application module support for IPVS | |
3 | * | |
4 | * Version: $Id: ip_vs_app.c,v 1.17 2003/03/22 06:31:21 wensong Exp $ | |
5 | * | |
6 | * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | * | |
13 | * Most code here is taken from ip_masq_app.c in kernel 2.2. The difference | |
14 | * is that ip_vs_app module handles the reverse direction (incoming requests | |
15 | * and outgoing responses). | |
16 | * | |
17 | * IP_MASQ_APP application masquerading module | |
18 | * | |
19 | * Author: Juan Jose Ciarlante, <jjciarla@raiz.uncu.edu.ar> | |
20 | * | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <linux/in.h> | |
27 | #include <linux/ip.h> | |
28 | #include <net/protocol.h> | |
29 | #include <asm/system.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/proc_fs.h> | |
32 | #include <linux/seq_file.h> | |
33 | ||
34 | #include <net/ip_vs.h> | |
35 | ||
36 | EXPORT_SYMBOL(register_ip_vs_app); | |
37 | EXPORT_SYMBOL(unregister_ip_vs_app); | |
38 | EXPORT_SYMBOL(register_ip_vs_app_inc); | |
39 | ||
40 | /* ipvs application list head */ | |
41 | static LIST_HEAD(ip_vs_app_list); | |
42 | static DECLARE_MUTEX(__ip_vs_app_mutex); | |
43 | ||
44 | ||
45 | /* | |
46 | * Get an ip_vs_app object | |
47 | */ | |
48 | static inline int ip_vs_app_get(struct ip_vs_app *app) | |
49 | { | |
50 | /* test and get the module atomically */ | |
51 | if (app->module) | |
52 | return try_module_get(app->module); | |
53 | else | |
54 | return 1; | |
55 | } | |
56 | ||
57 | ||
58 | static inline void ip_vs_app_put(struct ip_vs_app *app) | |
59 | { | |
60 | if (app->module) | |
61 | module_put(app->module); | |
62 | } | |
63 | ||
64 | ||
65 | /* | |
66 | * Allocate/initialize app incarnation and register it in proto apps. | |
67 | */ | |
68 | static int | |
69 | ip_vs_app_inc_new(struct ip_vs_app *app, __u16 proto, __u16 port) | |
70 | { | |
71 | struct ip_vs_protocol *pp; | |
72 | struct ip_vs_app *inc; | |
73 | int ret; | |
74 | ||
75 | if (!(pp = ip_vs_proto_get(proto))) | |
76 | return -EPROTONOSUPPORT; | |
77 | ||
78 | if (!pp->unregister_app) | |
79 | return -EOPNOTSUPP; | |
80 | ||
81 | inc = kmalloc(sizeof(struct ip_vs_app), GFP_KERNEL); | |
82 | if (!inc) | |
83 | return -ENOMEM; | |
84 | memcpy(inc, app, sizeof(*inc)); | |
85 | INIT_LIST_HEAD(&inc->p_list); | |
86 | INIT_LIST_HEAD(&inc->incs_list); | |
87 | inc->app = app; | |
88 | inc->port = htons(port); | |
89 | atomic_set(&inc->usecnt, 0); | |
90 | ||
91 | if (app->timeouts) { | |
92 | inc->timeout_table = | |
93 | ip_vs_create_timeout_table(app->timeouts, | |
94 | app->timeouts_size); | |
95 | if (!inc->timeout_table) { | |
96 | ret = -ENOMEM; | |
97 | goto out; | |
98 | } | |
99 | } | |
100 | ||
101 | ret = pp->register_app(inc); | |
102 | if (ret) | |
103 | goto out; | |
104 | ||
105 | list_add(&inc->a_list, &app->incs_list); | |
106 | IP_VS_DBG(9, "%s application %s:%u registered\n", | |
107 | pp->name, inc->name, inc->port); | |
108 | ||
109 | return 0; | |
110 | ||
111 | out: | |
112 | if (inc->timeout_table) | |
113 | kfree(inc->timeout_table); | |
114 | kfree(inc); | |
115 | return ret; | |
116 | } | |
117 | ||
118 | ||
119 | /* | |
120 | * Release app incarnation | |
121 | */ | |
122 | static void | |
123 | ip_vs_app_inc_release(struct ip_vs_app *inc) | |
124 | { | |
125 | struct ip_vs_protocol *pp; | |
126 | ||
127 | if (!(pp = ip_vs_proto_get(inc->protocol))) | |
128 | return; | |
129 | ||
130 | if (pp->unregister_app) | |
131 | pp->unregister_app(inc); | |
132 | ||
133 | IP_VS_DBG(9, "%s App %s:%u unregistered\n", | |
134 | pp->name, inc->name, inc->port); | |
135 | ||
136 | list_del(&inc->a_list); | |
137 | ||
138 | if (inc->timeout_table != NULL) | |
139 | kfree(inc->timeout_table); | |
140 | kfree(inc); | |
141 | } | |
142 | ||
143 | ||
144 | /* | |
145 | * Get reference to app inc (only called from softirq) | |
146 | * | |
147 | */ | |
148 | int ip_vs_app_inc_get(struct ip_vs_app *inc) | |
149 | { | |
150 | int result; | |
151 | ||
152 | atomic_inc(&inc->usecnt); | |
153 | if (unlikely((result = ip_vs_app_get(inc->app)) != 1)) | |
154 | atomic_dec(&inc->usecnt); | |
155 | return result; | |
156 | } | |
157 | ||
158 | ||
159 | /* | |
160 | * Put the app inc (only called from timer or net softirq) | |
161 | */ | |
162 | void ip_vs_app_inc_put(struct ip_vs_app *inc) | |
163 | { | |
164 | ip_vs_app_put(inc->app); | |
165 | atomic_dec(&inc->usecnt); | |
166 | } | |
167 | ||
168 | ||
169 | /* | |
170 | * Register an application incarnation in protocol applications | |
171 | */ | |
172 | int | |
173 | register_ip_vs_app_inc(struct ip_vs_app *app, __u16 proto, __u16 port) | |
174 | { | |
175 | int result; | |
176 | ||
177 | down(&__ip_vs_app_mutex); | |
178 | ||
179 | result = ip_vs_app_inc_new(app, proto, port); | |
180 | ||
181 | up(&__ip_vs_app_mutex); | |
182 | ||
183 | return result; | |
184 | } | |
185 | ||
186 | ||
187 | /* | |
188 | * ip_vs_app registration routine | |
189 | */ | |
190 | int register_ip_vs_app(struct ip_vs_app *app) | |
191 | { | |
192 | /* increase the module use count */ | |
193 | ip_vs_use_count_inc(); | |
194 | ||
195 | down(&__ip_vs_app_mutex); | |
196 | ||
197 | list_add(&app->a_list, &ip_vs_app_list); | |
198 | ||
199 | up(&__ip_vs_app_mutex); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | ||
205 | /* | |
206 | * ip_vs_app unregistration routine | |
207 | * We are sure there are no app incarnations attached to services | |
208 | */ | |
209 | void unregister_ip_vs_app(struct ip_vs_app *app) | |
210 | { | |
211 | struct ip_vs_app *inc, *nxt; | |
212 | ||
213 | down(&__ip_vs_app_mutex); | |
214 | ||
215 | list_for_each_entry_safe(inc, nxt, &app->incs_list, a_list) { | |
216 | ip_vs_app_inc_release(inc); | |
217 | } | |
218 | ||
219 | list_del(&app->a_list); | |
220 | ||
221 | up(&__ip_vs_app_mutex); | |
222 | ||
223 | /* decrease the module use count */ | |
224 | ip_vs_use_count_dec(); | |
225 | } | |
226 | ||
227 | ||
228 | #if 0000 | |
229 | /* | |
230 | * Get reference to app by name (called from user context) | |
231 | */ | |
232 | struct ip_vs_app *ip_vs_app_get_by_name(char *appname) | |
233 | { | |
234 | struct ip_vs_app *app, *a = NULL; | |
235 | ||
236 | down(&__ip_vs_app_mutex); | |
237 | ||
238 | list_for_each_entry(ent, &ip_vs_app_list, a_list) { | |
239 | if (strcmp(app->name, appname)) | |
240 | continue; | |
241 | ||
242 | /* softirq may call ip_vs_app_get too, so the caller | |
243 | must disable softirq on the current CPU */ | |
244 | if (ip_vs_app_get(app)) | |
245 | a = app; | |
246 | break; | |
247 | } | |
248 | ||
249 | up(&__ip_vs_app_mutex); | |
250 | ||
251 | return a; | |
252 | } | |
253 | #endif | |
254 | ||
255 | ||
256 | /* | |
257 | * Bind ip_vs_conn to its ip_vs_app (called by cp constructor) | |
258 | */ | |
259 | int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp) | |
260 | { | |
261 | return pp->app_conn_bind(cp); | |
262 | } | |
263 | ||
264 | ||
265 | /* | |
266 | * Unbind cp from application incarnation (called by cp destructor) | |
267 | */ | |
268 | void ip_vs_unbind_app(struct ip_vs_conn *cp) | |
269 | { | |
270 | struct ip_vs_app *inc = cp->app; | |
271 | ||
272 | if (!inc) | |
273 | return; | |
274 | ||
275 | if (inc->unbind_conn) | |
276 | inc->unbind_conn(inc, cp); | |
277 | if (inc->done_conn) | |
278 | inc->done_conn(inc, cp); | |
279 | ip_vs_app_inc_put(inc); | |
280 | cp->app = NULL; | |
281 | } | |
282 | ||
283 | ||
284 | /* | |
285 | * Fixes th->seq based on ip_vs_seq info. | |
286 | */ | |
287 | static inline void vs_fix_seq(const struct ip_vs_seq *vseq, struct tcphdr *th) | |
288 | { | |
289 | __u32 seq = ntohl(th->seq); | |
290 | ||
291 | /* | |
292 | * Adjust seq with delta-offset for all packets after | |
293 | * the most recent resized pkt seq and with previous_delta offset | |
294 | * for all packets before most recent resized pkt seq. | |
295 | */ | |
296 | if (vseq->delta || vseq->previous_delta) { | |
297 | if(after(seq, vseq->init_seq)) { | |
298 | th->seq = htonl(seq + vseq->delta); | |
299 | IP_VS_DBG(9, "vs_fix_seq(): added delta (%d) to seq\n", | |
300 | vseq->delta); | |
301 | } else { | |
302 | th->seq = htonl(seq + vseq->previous_delta); | |
303 | IP_VS_DBG(9, "vs_fix_seq(): added previous_delta " | |
304 | "(%d) to seq\n", vseq->previous_delta); | |
305 | } | |
306 | } | |
307 | } | |
308 | ||
309 | ||
310 | /* | |
311 | * Fixes th->ack_seq based on ip_vs_seq info. | |
312 | */ | |
313 | static inline void | |
314 | vs_fix_ack_seq(const struct ip_vs_seq *vseq, struct tcphdr *th) | |
315 | { | |
316 | __u32 ack_seq = ntohl(th->ack_seq); | |
317 | ||
318 | /* | |
319 | * Adjust ack_seq with delta-offset for | |
320 | * the packets AFTER most recent resized pkt has caused a shift | |
321 | * for packets before most recent resized pkt, use previous_delta | |
322 | */ | |
323 | if (vseq->delta || vseq->previous_delta) { | |
324 | /* since ack_seq is the number of octet that is expected | |
325 | to receive next, so compare it with init_seq+delta */ | |
326 | if(after(ack_seq, vseq->init_seq+vseq->delta)) { | |
327 | th->ack_seq = htonl(ack_seq - vseq->delta); | |
328 | IP_VS_DBG(9, "vs_fix_ack_seq(): subtracted delta " | |
329 | "(%d) from ack_seq\n", vseq->delta); | |
330 | ||
331 | } else { | |
332 | th->ack_seq = htonl(ack_seq - vseq->previous_delta); | |
333 | IP_VS_DBG(9, "vs_fix_ack_seq(): subtracted " | |
334 | "previous_delta (%d) from ack_seq\n", | |
335 | vseq->previous_delta); | |
336 | } | |
337 | } | |
338 | } | |
339 | ||
340 | ||
341 | /* | |
342 | * Updates ip_vs_seq if pkt has been resized | |
343 | * Assumes already checked proto==IPPROTO_TCP and diff!=0. | |
344 | */ | |
345 | static inline void vs_seq_update(struct ip_vs_conn *cp, struct ip_vs_seq *vseq, | |
346 | unsigned flag, __u32 seq, int diff) | |
347 | { | |
348 | /* spinlock is to keep updating cp->flags atomic */ | |
349 | spin_lock(&cp->lock); | |
350 | if (!(cp->flags & flag) || after(seq, vseq->init_seq)) { | |
351 | vseq->previous_delta = vseq->delta; | |
352 | vseq->delta += diff; | |
353 | vseq->init_seq = seq; | |
354 | cp->flags |= flag; | |
355 | } | |
356 | spin_unlock(&cp->lock); | |
357 | } | |
358 | ||
359 | static inline int app_tcp_pkt_out(struct ip_vs_conn *cp, struct sk_buff **pskb, | |
360 | struct ip_vs_app *app) | |
361 | { | |
362 | int diff; | |
363 | unsigned int tcp_offset = (*pskb)->nh.iph->ihl*4; | |
364 | struct tcphdr *th; | |
365 | __u32 seq; | |
366 | ||
367 | if (!ip_vs_make_skb_writable(pskb, tcp_offset + sizeof(*th))) | |
368 | return 0; | |
369 | ||
370 | th = (struct tcphdr *)((*pskb)->nh.raw + tcp_offset); | |
371 | ||
372 | /* | |
373 | * Remember seq number in case this pkt gets resized | |
374 | */ | |
375 | seq = ntohl(th->seq); | |
376 | ||
377 | /* | |
378 | * Fix seq stuff if flagged as so. | |
379 | */ | |
380 | if (cp->flags & IP_VS_CONN_F_OUT_SEQ) | |
381 | vs_fix_seq(&cp->out_seq, th); | |
382 | if (cp->flags & IP_VS_CONN_F_IN_SEQ) | |
383 | vs_fix_ack_seq(&cp->in_seq, th); | |
384 | ||
385 | /* | |
386 | * Call private output hook function | |
387 | */ | |
388 | if (app->pkt_out == NULL) | |
389 | return 1; | |
390 | ||
391 | if (!app->pkt_out(app, cp, pskb, &diff)) | |
392 | return 0; | |
393 | ||
394 | /* | |
395 | * Update ip_vs seq stuff if len has changed. | |
396 | */ | |
397 | if (diff != 0) | |
398 | vs_seq_update(cp, &cp->out_seq, | |
399 | IP_VS_CONN_F_OUT_SEQ, seq, diff); | |
400 | ||
401 | return 1; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Output pkt hook. Will call bound ip_vs_app specific function | |
406 | * called by ipvs packet handler, assumes previously checked cp!=NULL | |
407 | * returns false if it can't handle packet (oom) | |
408 | */ | |
409 | int ip_vs_app_pkt_out(struct ip_vs_conn *cp, struct sk_buff **pskb) | |
410 | { | |
411 | struct ip_vs_app *app; | |
412 | ||
413 | /* | |
414 | * check if application module is bound to | |
415 | * this ip_vs_conn. | |
416 | */ | |
417 | if ((app = cp->app) == NULL) | |
418 | return 1; | |
419 | ||
420 | /* TCP is complicated */ | |
421 | if (cp->protocol == IPPROTO_TCP) | |
422 | return app_tcp_pkt_out(cp, pskb, app); | |
423 | ||
424 | /* | |
425 | * Call private output hook function | |
426 | */ | |
427 | if (app->pkt_out == NULL) | |
428 | return 1; | |
429 | ||
430 | return app->pkt_out(app, cp, pskb, NULL); | |
431 | } | |
432 | ||
433 | ||
434 | static inline int app_tcp_pkt_in(struct ip_vs_conn *cp, struct sk_buff **pskb, | |
435 | struct ip_vs_app *app) | |
436 | { | |
437 | int diff; | |
438 | unsigned int tcp_offset = (*pskb)->nh.iph->ihl*4; | |
439 | struct tcphdr *th; | |
440 | __u32 seq; | |
441 | ||
442 | if (!ip_vs_make_skb_writable(pskb, tcp_offset + sizeof(*th))) | |
443 | return 0; | |
444 | ||
445 | th = (struct tcphdr *)((*pskb)->nh.raw + tcp_offset); | |
446 | ||
447 | /* | |
448 | * Remember seq number in case this pkt gets resized | |
449 | */ | |
450 | seq = ntohl(th->seq); | |
451 | ||
452 | /* | |
453 | * Fix seq stuff if flagged as so. | |
454 | */ | |
455 | if (cp->flags & IP_VS_CONN_F_IN_SEQ) | |
456 | vs_fix_seq(&cp->in_seq, th); | |
457 | if (cp->flags & IP_VS_CONN_F_OUT_SEQ) | |
458 | vs_fix_ack_seq(&cp->out_seq, th); | |
459 | ||
460 | /* | |
461 | * Call private input hook function | |
462 | */ | |
463 | if (app->pkt_in == NULL) | |
464 | return 1; | |
465 | ||
466 | if (!app->pkt_in(app, cp, pskb, &diff)) | |
467 | return 0; | |
468 | ||
469 | /* | |
470 | * Update ip_vs seq stuff if len has changed. | |
471 | */ | |
472 | if (diff != 0) | |
473 | vs_seq_update(cp, &cp->in_seq, | |
474 | IP_VS_CONN_F_IN_SEQ, seq, diff); | |
475 | ||
476 | return 1; | |
477 | } | |
478 | ||
479 | /* | |
480 | * Input pkt hook. Will call bound ip_vs_app specific function | |
481 | * called by ipvs packet handler, assumes previously checked cp!=NULL. | |
482 | * returns false if can't handle packet (oom). | |
483 | */ | |
484 | int ip_vs_app_pkt_in(struct ip_vs_conn *cp, struct sk_buff **pskb) | |
485 | { | |
486 | struct ip_vs_app *app; | |
487 | ||
488 | /* | |
489 | * check if application module is bound to | |
490 | * this ip_vs_conn. | |
491 | */ | |
492 | if ((app = cp->app) == NULL) | |
493 | return 1; | |
494 | ||
495 | /* TCP is complicated */ | |
496 | if (cp->protocol == IPPROTO_TCP) | |
497 | return app_tcp_pkt_in(cp, pskb, app); | |
498 | ||
499 | /* | |
500 | * Call private input hook function | |
501 | */ | |
502 | if (app->pkt_in == NULL) | |
503 | return 1; | |
504 | ||
505 | return app->pkt_in(app, cp, pskb, NULL); | |
506 | } | |
507 | ||
508 | ||
509 | #ifdef CONFIG_PROC_FS | |
510 | /* | |
511 | * /proc/net/ip_vs_app entry function | |
512 | */ | |
513 | ||
514 | static struct ip_vs_app *ip_vs_app_idx(loff_t pos) | |
515 | { | |
516 | struct ip_vs_app *app, *inc; | |
517 | ||
518 | list_for_each_entry(app, &ip_vs_app_list, a_list) { | |
519 | list_for_each_entry(inc, &app->incs_list, a_list) { | |
520 | if (pos-- == 0) | |
521 | return inc; | |
522 | } | |
523 | } | |
524 | return NULL; | |
525 | ||
526 | } | |
527 | ||
528 | static void *ip_vs_app_seq_start(struct seq_file *seq, loff_t *pos) | |
529 | { | |
530 | down(&__ip_vs_app_mutex); | |
531 | ||
532 | return *pos ? ip_vs_app_idx(*pos - 1) : SEQ_START_TOKEN; | |
533 | } | |
534 | ||
535 | static void *ip_vs_app_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
536 | { | |
537 | struct ip_vs_app *inc, *app; | |
538 | struct list_head *e; | |
539 | ||
540 | ++*pos; | |
541 | if (v == SEQ_START_TOKEN) | |
542 | return ip_vs_app_idx(0); | |
543 | ||
544 | inc = v; | |
545 | app = inc->app; | |
546 | ||
547 | if ((e = inc->a_list.next) != &app->incs_list) | |
548 | return list_entry(e, struct ip_vs_app, a_list); | |
549 | ||
550 | /* go on to next application */ | |
551 | for (e = app->a_list.next; e != &ip_vs_app_list; e = e->next) { | |
552 | app = list_entry(e, struct ip_vs_app, a_list); | |
553 | list_for_each_entry(inc, &app->incs_list, a_list) { | |
554 | return inc; | |
555 | } | |
556 | } | |
557 | return NULL; | |
558 | } | |
559 | ||
560 | static void ip_vs_app_seq_stop(struct seq_file *seq, void *v) | |
561 | { | |
562 | up(&__ip_vs_app_mutex); | |
563 | } | |
564 | ||
565 | static int ip_vs_app_seq_show(struct seq_file *seq, void *v) | |
566 | { | |
567 | if (v == SEQ_START_TOKEN) | |
568 | seq_puts(seq, "prot port usecnt name\n"); | |
569 | else { | |
570 | const struct ip_vs_app *inc = v; | |
571 | ||
572 | seq_printf(seq, "%-3s %-7u %-6d %-17s\n", | |
573 | ip_vs_proto_name(inc->protocol), | |
574 | ntohs(inc->port), | |
575 | atomic_read(&inc->usecnt), | |
576 | inc->name); | |
577 | } | |
578 | return 0; | |
579 | } | |
580 | ||
581 | static struct seq_operations ip_vs_app_seq_ops = { | |
582 | .start = ip_vs_app_seq_start, | |
583 | .next = ip_vs_app_seq_next, | |
584 | .stop = ip_vs_app_seq_stop, | |
585 | .show = ip_vs_app_seq_show, | |
586 | }; | |
587 | ||
588 | static int ip_vs_app_open(struct inode *inode, struct file *file) | |
589 | { | |
590 | return seq_open(file, &ip_vs_app_seq_ops); | |
591 | } | |
592 | ||
593 | static struct file_operations ip_vs_app_fops = { | |
594 | .owner = THIS_MODULE, | |
595 | .open = ip_vs_app_open, | |
596 | .read = seq_read, | |
597 | .llseek = seq_lseek, | |
598 | .release = seq_release, | |
599 | }; | |
600 | #endif | |
601 | ||
602 | ||
603 | /* | |
604 | * Replace a segment of data with a new segment | |
605 | */ | |
606 | int ip_vs_skb_replace(struct sk_buff *skb, int pri, | |
607 | char *o_buf, int o_len, char *n_buf, int n_len) | |
608 | { | |
609 | struct iphdr *iph; | |
610 | int diff; | |
611 | int o_offset; | |
612 | int o_left; | |
613 | ||
614 | EnterFunction(9); | |
615 | ||
616 | diff = n_len - o_len; | |
617 | o_offset = o_buf - (char *)skb->data; | |
618 | /* The length of left data after o_buf+o_len in the skb data */ | |
619 | o_left = skb->len - (o_offset + o_len); | |
620 | ||
621 | if (diff <= 0) { | |
622 | memmove(o_buf + n_len, o_buf + o_len, o_left); | |
623 | memcpy(o_buf, n_buf, n_len); | |
624 | skb_trim(skb, skb->len + diff); | |
625 | } else if (diff <= skb_tailroom(skb)) { | |
626 | skb_put(skb, diff); | |
627 | memmove(o_buf + n_len, o_buf + o_len, o_left); | |
628 | memcpy(o_buf, n_buf, n_len); | |
629 | } else { | |
630 | if (pskb_expand_head(skb, skb_headroom(skb), diff, pri)) | |
631 | return -ENOMEM; | |
632 | skb_put(skb, diff); | |
633 | memmove(skb->data + o_offset + n_len, | |
634 | skb->data + o_offset + o_len, o_left); | |
635 | memcpy(skb->data + o_offset, n_buf, n_len); | |
636 | } | |
637 | ||
638 | /* must update the iph total length here */ | |
639 | iph = skb->nh.iph; | |
640 | iph->tot_len = htons(skb->len); | |
641 | ||
642 | LeaveFunction(9); | |
643 | return 0; | |
644 | } | |
645 | ||
646 | ||
647 | int ip_vs_app_init(void) | |
648 | { | |
649 | /* we will replace it with proc_net_ipvs_create() soon */ | |
650 | proc_net_fops_create("ip_vs_app", 0, &ip_vs_app_fops); | |
651 | return 0; | |
652 | } | |
653 | ||
654 | ||
655 | void ip_vs_app_cleanup(void) | |
656 | { | |
657 | proc_net_remove("ip_vs_app"); | |
658 | } |