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authorYasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>2005-11-09 19:38:16 -0500
committerDavid S. Miller <davem@davemloft.net>2005-11-09 19:38:16 -0500
commit9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 (patch)
treec964a62bdd766eca436c30f51a9e33e2b798b0a6 /net/ipv6
parent6730c3c14421b7c924d06e31bb66e0adad225547 (diff)
[NETFILTER]: Add nf_conntrack subsystem.
The existing connection tracking subsystem in netfilter can only handle ipv4. There were basically two choices present to add connection tracking support for ipv6. We could either duplicate all of the ipv4 connection tracking code into an ipv6 counterpart, or (the choice taken by these patches) we could design a generic layer that could handle both ipv4 and ipv6 and thus requiring only one sub-protocol (TCP, UDP, etc.) connection tracking helper module to be written. In fact nf_conntrack is capable of working with any layer 3 protocol. The existing ipv4 specific conntrack code could also not deal with the pecularities of doing connection tracking on ipv6, which is also cured here. For example, these issues include: 1) ICMPv6 handling, which is used for neighbour discovery in ipv6 thus some messages such as these should not participate in connection tracking since effectively they are like ARP messages 2) fragmentation must be handled differently in ipv6, because the simplistic "defrag, connection track and NAT, refrag" (which the existing ipv4 connection tracking does) approach simply isn't feasible in ipv6 3) ipv6 extension header parsing must occur at the correct spots before and after connection tracking decisions, and there were no provisions for this in the existing connection tracking design 4) ipv6 has no need for stateful NAT The ipv4 specific conntrack layer is kept around, until all of the ipv4 specific conntrack helpers are ported over to nf_conntrack and it is feature complete. Once that occurs, the old conntrack stuff will get placed into the feature-removal-schedule and we will fully kill it off 6 months later. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ip6_input.c5
-rw-r--r--net/ipv6/ip6_output.c6
-rw-r--r--net/ipv6/netfilter/Kconfig14
-rw-r--r--net/ipv6/netfilter/Makefile6
-rw-r--r--net/ipv6/netfilter/ip6t_MARK.c6
-rw-r--r--net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c556
-rw-r--r--net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c272
-rw-r--r--net/ipv6/netfilter/nf_conntrack_reasm.c885
-rw-r--r--net/ipv6/raw.c4
9 files changed, 1750 insertions, 4 deletions
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 6e3480426939..a6026d2787d2 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -176,6 +176,11 @@ resubmit:
176 if (ipprot->flags & INET6_PROTO_FINAL) { 176 if (ipprot->flags & INET6_PROTO_FINAL) {
177 struct ipv6hdr *hdr; 177 struct ipv6hdr *hdr;
178 178
179 /* Free reference early: we don't need it any more,
180 and it may hold ip_conntrack module loaded
181 indefinitely. */
182 nf_reset(skb);
183
179 skb_postpull_rcsum(skb, skb->nh.raw, 184 skb_postpull_rcsum(skb, skb->nh.raw,
180 skb->h.raw - skb->nh.raw); 185 skb->h.raw - skb->nh.raw);
181 hdr = skb->nh.ipv6h; 186 hdr = skb->nh.ipv6h;
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index dbd9767b32e4..c1fa693511a1 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -441,9 +441,15 @@ static void ip6_copy_metadata(struct sk_buff *to, struct sk_buff *from)
441#ifdef CONFIG_NETFILTER 441#ifdef CONFIG_NETFILTER
442 to->nfmark = from->nfmark; 442 to->nfmark = from->nfmark;
443 /* Connection association is same as pre-frag packet */ 443 /* Connection association is same as pre-frag packet */
444 nf_conntrack_put(to->nfct);
444 to->nfct = from->nfct; 445 to->nfct = from->nfct;
445 nf_conntrack_get(to->nfct); 446 nf_conntrack_get(to->nfct);
446 to->nfctinfo = from->nfctinfo; 447 to->nfctinfo = from->nfctinfo;
448#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
449 nf_conntrack_put_reasm(to->nfct_reasm);
450 to->nfct_reasm = from->nfct_reasm;
451 nf_conntrack_get_reasm(to->nfct_reasm);
452#endif
447#ifdef CONFIG_BRIDGE_NETFILTER 453#ifdef CONFIG_BRIDGE_NETFILTER
448 nf_bridge_put(to->nf_bridge); 454 nf_bridge_put(to->nf_bridge);
449 to->nf_bridge = from->nf_bridge; 455 to->nf_bridge = from->nf_bridge;
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index bb7ccfe33f23..971ba60bf6e9 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -278,5 +278,19 @@ config IP6_NF_RAW
278 If you want to compile it as a module, say M here and read 278 If you want to compile it as a module, say M here and read
279 <file:Documentation/modules.txt>. If unsure, say `N'. 279 <file:Documentation/modules.txt>. If unsure, say `N'.
280 280
281config NF_CONNTRACK_IPV6
282 tristate "IPv6 support for new connection tracking (EXPERIMENTAL)"
283 depends on EXPERIMENTAL && NF_CONNTRACK
284 ---help---
285 Connection tracking keeps a record of what packets have passed
286 through your machine, in order to figure out how they are related
287 into connections.
288
289 This is IPv6 support on Layer 3 independent connection tracking.
290 Layer 3 independent connection tracking is experimental scheme
291 which generalize ip_conntrack to support other layer 3 protocols.
292
293 To compile it as a module, choose M here. If unsure, say N.
294
281endmenu 295endmenu
282 296
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index 2b2c370e8b1c..9ab5b2ca1f59 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -27,3 +27,9 @@ obj-$(CONFIG_IP6_NF_TARGET_LOG) += ip6t_LOG.o
27obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o 27obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o
28obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o 28obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o
29obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o 29obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o
30
31# objects for l3 independent conntrack
32nf_conntrack_ipv6-objs := nf_conntrack_l3proto_ipv6.o nf_conntrack_proto_icmpv6.o nf_conntrack_reasm.o
33
34# l3 independent conntrack
35obj-$(CONFIG_NF_CONNTRACK_IPV6) += nf_conntrack_ipv6.o
diff --git a/net/ipv6/netfilter/ip6t_MARK.c b/net/ipv6/netfilter/ip6t_MARK.c
index 0c7584f92172..eab8fb864ee0 100644
--- a/net/ipv6/netfilter/ip6t_MARK.c
+++ b/net/ipv6/netfilter/ip6t_MARK.c
@@ -56,9 +56,9 @@ checkentry(const char *tablename,
56 return 1; 56 return 1;
57} 57}
58 58
59static struct ip6t_target ip6t_mark_reg = { 59static struct ip6t_target ip6t_mark_reg = {
60 .name = "MARK", 60 .name = "MARK",
61 .target = target, 61 .target = target,
62 .checkentry = checkentry, 62 .checkentry = checkentry,
63 .me = THIS_MODULE 63 .me = THIS_MODULE
64}; 64};
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
new file mode 100644
index 000000000000..e2c90b3a8074
--- /dev/null
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -0,0 +1,556 @@
1/*
2 * Copyright (C)2004 USAGI/WIDE Project
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * Author:
9 * Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
10 *
11 * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
12 * - support Layer 3 protocol independent connection tracking.
13 * Based on the original ip_conntrack code which had the following
14 * copyright information:
15 * (C) 1999-2001 Paul `Rusty' Russell
16 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
17 *
18 * 23 Mar 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
19 * - add get_features() to support various size of conntrack
20 * structures.
21 */
22
23#include <linux/config.h>
24#include <linux/types.h>
25#include <linux/ipv6.h>
26#include <linux/in6.h>
27#include <linux/netfilter.h>
28#include <linux/module.h>
29#include <linux/skbuff.h>
30#include <linux/icmp.h>
31#include <linux/sysctl.h>
32#include <net/ipv6.h>
33
34#include <linux/netfilter_ipv6.h>
35#include <net/netfilter/nf_conntrack.h>
36#include <net/netfilter/nf_conntrack_helper.h>
37#include <net/netfilter/nf_conntrack_protocol.h>
38#include <net/netfilter/nf_conntrack_l3proto.h>
39#include <net/netfilter/nf_conntrack_core.h>
40
41#if 0
42#define DEBUGP printk
43#else
44#define DEBUGP(format, args...)
45#endif
46
47DECLARE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat);
48
49static int ipv6_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
50 struct nf_conntrack_tuple *tuple)
51{
52 u_int32_t _addrs[8], *ap;
53
54 ap = skb_header_pointer(skb, nhoff + offsetof(struct ipv6hdr, saddr),
55 sizeof(_addrs), _addrs);
56 if (ap == NULL)
57 return 0;
58
59 memcpy(tuple->src.u3.ip6, ap, sizeof(tuple->src.u3.ip6));
60 memcpy(tuple->dst.u3.ip6, ap + 4, sizeof(tuple->dst.u3.ip6));
61
62 return 1;
63}
64
65static int ipv6_invert_tuple(struct nf_conntrack_tuple *tuple,
66 const struct nf_conntrack_tuple *orig)
67{
68 memcpy(tuple->src.u3.ip6, orig->dst.u3.ip6, sizeof(tuple->src.u3.ip6));
69 memcpy(tuple->dst.u3.ip6, orig->src.u3.ip6, sizeof(tuple->dst.u3.ip6));
70
71 return 1;
72}
73
74static int ipv6_print_tuple(struct seq_file *s,
75 const struct nf_conntrack_tuple *tuple)
76{
77 return seq_printf(s, "src=%x:%x:%x:%x:%x:%x:%x:%x dst=%x:%x:%x:%x:%x:%x:%x:%x ",
78 NIP6(*((struct in6_addr *)tuple->src.u3.ip6)),
79 NIP6(*((struct in6_addr *)tuple->dst.u3.ip6)));
80}
81
82static int ipv6_print_conntrack(struct seq_file *s,
83 const struct nf_conn *conntrack)
84{
85 return 0;
86}
87
88/*
89 * Based on ipv6_skip_exthdr() in net/ipv6/exthdr.c
90 *
91 * This function parses (probably truncated) exthdr set "hdr"
92 * of length "len". "nexthdrp" initially points to some place,
93 * where type of the first header can be found.
94 *
95 * It skips all well-known exthdrs, and returns pointer to the start
96 * of unparsable area i.e. the first header with unknown type.
97 * if success, *nexthdr is updated by type/protocol of this header.
98 *
99 * NOTES: - it may return pointer pointing beyond end of packet,
100 * if the last recognized header is truncated in the middle.
101 * - if packet is truncated, so that all parsed headers are skipped,
102 * it returns -1.
103 * - if packet is fragmented, return pointer of the fragment header.
104 * - ESP is unparsable for now and considered like
105 * normal payload protocol.
106 * - Note also special handling of AUTH header. Thanks to IPsec wizards.
107 */
108
109int nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start, u8 *nexthdrp,
110 int len)
111{
112 u8 nexthdr = *nexthdrp;
113
114 while (ipv6_ext_hdr(nexthdr)) {
115 struct ipv6_opt_hdr hdr;
116 int hdrlen;
117
118 if (len < (int)sizeof(struct ipv6_opt_hdr))
119 return -1;
120 if (nexthdr == NEXTHDR_NONE)
121 break;
122 if (nexthdr == NEXTHDR_FRAGMENT)
123 break;
124 if (skb_copy_bits(skb, start, &hdr, sizeof(hdr)))
125 BUG();
126 if (nexthdr == NEXTHDR_AUTH)
127 hdrlen = (hdr.hdrlen+2)<<2;
128 else
129 hdrlen = ipv6_optlen(&hdr);
130
131 nexthdr = hdr.nexthdr;
132 len -= hdrlen;
133 start += hdrlen;
134 }
135
136 *nexthdrp = nexthdr;
137 return start;
138}
139
140static int
141ipv6_prepare(struct sk_buff **pskb, unsigned int hooknum, unsigned int *dataoff,
142 u_int8_t *protonum)
143{
144 unsigned int extoff;
145 unsigned char pnum;
146 int protoff;
147
148 extoff = (u8*)((*pskb)->nh.ipv6h + 1) - (*pskb)->data;
149 pnum = (*pskb)->nh.ipv6h->nexthdr;
150
151 protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum,
152 (*pskb)->len - extoff);
153
154 /*
155 * (protoff == (*pskb)->len) mean that the packet doesn't have no data
156 * except of IPv6 & ext headers. but it's tracked anyway. - YK
157 */
158 if ((protoff < 0) || (protoff > (*pskb)->len)) {
159 DEBUGP("ip6_conntrack_core: can't find proto in pkt\n");
160 NF_CT_STAT_INC(error);
161 NF_CT_STAT_INC(invalid);
162 return -NF_ACCEPT;
163 }
164
165 *dataoff = protoff;
166 *protonum = pnum;
167 return NF_ACCEPT;
168}
169
170static u_int32_t ipv6_get_features(const struct nf_conntrack_tuple *tuple)
171{
172 return NF_CT_F_BASIC;
173}
174
175static unsigned int ipv6_confirm(unsigned int hooknum,
176 struct sk_buff **pskb,
177 const struct net_device *in,
178 const struct net_device *out,
179 int (*okfn)(struct sk_buff *))
180{
181 struct nf_conn *ct;
182 enum ip_conntrack_info ctinfo;
183
184 /* This is where we call the helper: as the packet goes out. */
185 ct = nf_ct_get(*pskb, &ctinfo);
186 if (ct && ct->helper) {
187 unsigned int ret, protoff;
188 unsigned int extoff = (u8*)((*pskb)->nh.ipv6h + 1)
189 - (*pskb)->data;
190 unsigned char pnum = (*pskb)->nh.ipv6h->nexthdr;
191
192 protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum,
193 (*pskb)->len - extoff);
194 if (protoff < 0 || protoff > (*pskb)->len ||
195 pnum == NEXTHDR_FRAGMENT) {
196 DEBUGP("proto header not found\n");
197 return NF_ACCEPT;
198 }
199
200 ret = ct->helper->help(pskb, protoff, ct, ctinfo);
201 if (ret != NF_ACCEPT)
202 return ret;
203 }
204
205 /* We've seen it coming out the other side: confirm it */
206
207 return nf_conntrack_confirm(pskb);
208}
209
210extern struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb);
211extern void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb,
212 struct net_device *in,
213 struct net_device *out,
214 int (*okfn)(struct sk_buff *));
215static unsigned int ipv6_defrag(unsigned int hooknum,
216 struct sk_buff **pskb,
217 const struct net_device *in,
218 const struct net_device *out,
219 int (*okfn)(struct sk_buff *))
220{
221 struct sk_buff *reasm;
222
223 /* Previously seen (loopback)? */
224 if ((*pskb)->nfct)
225 return NF_ACCEPT;
226
227 reasm = nf_ct_frag6_gather(*pskb);
228
229 /* queued */
230 if (reasm == NULL)
231 return NF_STOLEN;
232
233 /* error occured or not fragmented */
234 if (reasm == *pskb)
235 return NF_ACCEPT;
236
237 nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in,
238 (struct net_device *)out, okfn);
239
240 return NF_STOLEN;
241}
242
243static unsigned int ipv6_conntrack_in(unsigned int hooknum,
244 struct sk_buff **pskb,
245 const struct net_device *in,
246 const struct net_device *out,
247 int (*okfn)(struct sk_buff *))
248{
249 struct sk_buff *reasm = (*pskb)->nfct_reasm;
250
251 /* This packet is fragmented and has reassembled packet. */
252 if (reasm) {
253 /* Reassembled packet isn't parsed yet ? */
254 if (!reasm->nfct) {
255 unsigned int ret;
256
257 ret = nf_conntrack_in(PF_INET6, hooknum, &reasm);
258 if (ret != NF_ACCEPT)
259 return ret;
260 }
261 nf_conntrack_get(reasm->nfct);
262 (*pskb)->nfct = reasm->nfct;
263 return NF_ACCEPT;
264 }
265
266 return nf_conntrack_in(PF_INET6, hooknum, pskb);
267}
268
269static unsigned int ipv6_conntrack_local(unsigned int hooknum,
270 struct sk_buff **pskb,
271 const struct net_device *in,
272 const struct net_device *out,
273 int (*okfn)(struct sk_buff *))
274{
275 /* root is playing with raw sockets. */
276 if ((*pskb)->len < sizeof(struct ipv6hdr)) {
277 if (net_ratelimit())
278 printk("ipv6_conntrack_local: packet too short\n");
279 return NF_ACCEPT;
280 }
281 return ipv6_conntrack_in(hooknum, pskb, in, out, okfn);
282}
283
284/* Connection tracking may drop packets, but never alters them, so
285 make it the first hook. */
286static struct nf_hook_ops ipv6_conntrack_defrag_ops = {
287 .hook = ipv6_defrag,
288 .owner = THIS_MODULE,
289 .pf = PF_INET6,
290 .hooknum = NF_IP6_PRE_ROUTING,
291 .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
292};
293
294static struct nf_hook_ops ipv6_conntrack_in_ops = {
295 .hook = ipv6_conntrack_in,
296 .owner = THIS_MODULE,
297 .pf = PF_INET6,
298 .hooknum = NF_IP6_PRE_ROUTING,
299 .priority = NF_IP6_PRI_CONNTRACK,
300};
301
302static struct nf_hook_ops ipv6_conntrack_local_out_ops = {
303 .hook = ipv6_conntrack_local,
304 .owner = THIS_MODULE,
305 .pf = PF_INET6,
306 .hooknum = NF_IP6_LOCAL_OUT,
307 .priority = NF_IP6_PRI_CONNTRACK,
308};
309
310static struct nf_hook_ops ipv6_conntrack_defrag_local_out_ops = {
311 .hook = ipv6_defrag,
312 .owner = THIS_MODULE,
313 .pf = PF_INET6,
314 .hooknum = NF_IP6_LOCAL_OUT,
315 .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
316};
317
318/* Refragmenter; last chance. */
319static struct nf_hook_ops ipv6_conntrack_out_ops = {
320 .hook = ipv6_confirm,
321 .owner = THIS_MODULE,
322 .pf = PF_INET6,
323 .hooknum = NF_IP6_POST_ROUTING,
324 .priority = NF_IP6_PRI_LAST,
325};
326
327static struct nf_hook_ops ipv6_conntrack_local_in_ops = {
328 .hook = ipv6_confirm,
329 .owner = THIS_MODULE,
330 .pf = PF_INET6,
331 .hooknum = NF_IP6_LOCAL_IN,
332 .priority = NF_IP6_PRI_LAST-1,
333};
334
335#ifdef CONFIG_SYSCTL
336
337/* From nf_conntrack_proto_icmpv6.c */
338extern unsigned long nf_ct_icmpv6_timeout;
339
340/* From nf_conntrack_frag6.c */
341extern unsigned long nf_ct_frag6_timeout;
342extern unsigned long nf_ct_frag6_low_thresh;
343extern unsigned long nf_ct_frag6_high_thresh;
344
345static struct ctl_table_header *nf_ct_ipv6_sysctl_header;
346
347static ctl_table nf_ct_sysctl_table[] = {
348 {
349 .ctl_name = NET_NF_CONNTRACK_ICMPV6_TIMEOUT,
350 .procname = "nf_conntrack_icmpv6_timeout",
351 .data = &nf_ct_icmpv6_timeout,
352 .maxlen = sizeof(unsigned int),
353 .mode = 0644,
354 .proc_handler = &proc_dointvec_jiffies,
355 },
356 {
357 .ctl_name = NET_NF_CONNTRACK_FRAG6_TIMEOUT,
358 .procname = "nf_conntrack_frag6_timeout",
359 .data = &nf_ct_frag6_timeout,
360 .maxlen = sizeof(unsigned int),
361 .mode = 0644,
362 .proc_handler = &proc_dointvec_jiffies,
363 },
364 {
365 .ctl_name = NET_NF_CONNTRACK_FRAG6_LOW_THRESH,
366 .procname = "nf_conntrack_frag6_low_thresh",
367 .data = &nf_ct_frag6_low_thresh,
368 .maxlen = sizeof(unsigned int),
369 .mode = 0644,
370 .proc_handler = &proc_dointvec_jiffies,
371 },
372 {
373 .ctl_name = NET_NF_CONNTRACK_FRAG6_HIGH_THRESH,
374 .procname = "nf_conntrack_frag6_high_thresh",
375 .data = &nf_ct_frag6_high_thresh,
376 .maxlen = sizeof(unsigned int),
377 .mode = 0644,
378 .proc_handler = &proc_dointvec_jiffies,
379 },
380 { .ctl_name = 0 }
381};
382
383static ctl_table nf_ct_netfilter_table[] = {
384 {
385 .ctl_name = NET_NETFILTER,
386 .procname = "netfilter",
387 .mode = 0555,
388 .child = nf_ct_sysctl_table,
389 },
390 { .ctl_name = 0 }
391};
392
393static ctl_table nf_ct_net_table[] = {
394 {
395 .ctl_name = CTL_NET,
396 .procname = "net",
397 .mode = 0555,
398 .child = nf_ct_netfilter_table,
399 },
400 { .ctl_name = 0 }
401};
402#endif
403
404struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 = {
405 .l3proto = PF_INET6,
406 .name = "ipv6",
407 .pkt_to_tuple = ipv6_pkt_to_tuple,
408 .invert_tuple = ipv6_invert_tuple,
409 .print_tuple = ipv6_print_tuple,
410 .print_conntrack = ipv6_print_conntrack,
411 .prepare = ipv6_prepare,
412 .get_features = ipv6_get_features,
413 .me = THIS_MODULE,
414};
415
416extern struct nf_conntrack_protocol nf_conntrack_protocol_tcp6;
417extern struct nf_conntrack_protocol nf_conntrack_protocol_udp6;
418extern struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6;
419extern int nf_ct_frag6_init(void);
420extern void nf_ct_frag6_cleanup(void);
421static int init_or_cleanup(int init)
422{
423 int ret = 0;
424
425 if (!init) goto cleanup;
426
427 ret = nf_ct_frag6_init();
428 if (ret < 0) {
429 printk("nf_conntrack_ipv6: can't initialize frag6.\n");
430 goto cleanup_nothing;
431 }
432 ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_tcp6);
433 if (ret < 0) {
434 printk("nf_conntrack_ipv6: can't register tcp.\n");
435 goto cleanup_frag6;
436 }
437
438 ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_udp6);
439 if (ret < 0) {
440 printk("nf_conntrack_ipv6: can't register udp.\n");
441 goto cleanup_tcp;
442 }
443
444 ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_icmpv6);
445 if (ret < 0) {
446 printk("nf_conntrack_ipv6: can't register icmpv6.\n");
447 goto cleanup_udp;
448 }
449
450 ret = nf_conntrack_l3proto_register(&nf_conntrack_l3proto_ipv6);
451 if (ret < 0) {
452 printk("nf_conntrack_ipv6: can't register ipv6\n");
453 goto cleanup_icmpv6;
454 }
455
456 ret = nf_register_hook(&ipv6_conntrack_defrag_ops);
457 if (ret < 0) {
458 printk("nf_conntrack_ipv6: can't register pre-routing defrag "
459 "hook.\n");
460 goto cleanup_ipv6;
461 }
462
463 ret = nf_register_hook(&ipv6_conntrack_defrag_local_out_ops);
464 if (ret < 0) {
465 printk("nf_conntrack_ipv6: can't register local_out defrag "
466 "hook.\n");
467 goto cleanup_defragops;
468 }
469
470 ret = nf_register_hook(&ipv6_conntrack_in_ops);
471 if (ret < 0) {
472 printk("nf_conntrack_ipv6: can't register pre-routing hook.\n");
473 goto cleanup_defraglocalops;
474 }
475
476 ret = nf_register_hook(&ipv6_conntrack_local_out_ops);
477 if (ret < 0) {
478 printk("nf_conntrack_ipv6: can't register local out hook.\n");
479 goto cleanup_inops;
480 }
481
482 ret = nf_register_hook(&ipv6_conntrack_out_ops);
483 if (ret < 0) {
484 printk("nf_conntrack_ipv6: can't register post-routing hook.\n");
485 goto cleanup_inandlocalops;
486 }
487
488 ret = nf_register_hook(&ipv6_conntrack_local_in_ops);
489 if (ret < 0) {
490 printk("nf_conntrack_ipv6: can't register local in hook.\n");
491 goto cleanup_inoutandlocalops;
492 }
493
494#ifdef CONFIG_SYSCTL
495 nf_ct_ipv6_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
496 if (nf_ct_ipv6_sysctl_header == NULL) {
497 printk("nf_conntrack: can't register to sysctl.\n");
498 ret = -ENOMEM;
499 goto cleanup_localinops;
500 }
501#endif
502 return ret;
503
504 cleanup:
505 synchronize_net();
506#ifdef CONFIG_SYSCTL
507 unregister_sysctl_table(nf_ct_ipv6_sysctl_header);
508 cleanup_localinops:
509#endif
510 nf_unregister_hook(&ipv6_conntrack_local_in_ops);
511 cleanup_inoutandlocalops:
512 nf_unregister_hook(&ipv6_conntrack_out_ops);
513 cleanup_inandlocalops:
514 nf_unregister_hook(&ipv6_conntrack_local_out_ops);
515 cleanup_inops:
516 nf_unregister_hook(&ipv6_conntrack_in_ops);
517 cleanup_defraglocalops:
518 nf_unregister_hook(&ipv6_conntrack_defrag_local_out_ops);
519 cleanup_defragops:
520 nf_unregister_hook(&ipv6_conntrack_defrag_ops);
521 cleanup_ipv6:
522 nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6);
523 cleanup_icmpv6:
524 nf_conntrack_protocol_unregister(&nf_conntrack_protocol_icmpv6);
525 cleanup_udp:
526 nf_conntrack_protocol_unregister(&nf_conntrack_protocol_udp6);
527 cleanup_tcp:
528 nf_conntrack_protocol_unregister(&nf_conntrack_protocol_tcp6);
529 cleanup_frag6:
530 nf_ct_frag6_cleanup();
531 cleanup_nothing:
532 return ret;
533}
534
535MODULE_LICENSE("GPL");
536MODULE_AUTHOR("Yasuyuki KOZAKAI @USAGI <yasuyuki.kozakai@toshiba.co.jp>");
537
538static int __init init(void)
539{
540 need_nf_conntrack();
541 return init_or_cleanup(1);
542}
543
544static void __exit fini(void)
545{
546 init_or_cleanup(0);
547}
548
549module_init(init);
550module_exit(fini);
551
552void need_ip6_conntrack(void)
553{
554}
555
556EXPORT_SYMBOL(need_ip6_conntrack);
diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
new file mode 100644
index 000000000000..c0f1da5497a9
--- /dev/null
+++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
@@ -0,0 +1,272 @@
1/*
2 * Copyright (C)2003,2004 USAGI/WIDE Project
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * Author:
9 * Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
10 *
11 * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
12 * - ICMPv6 tracking support. Derived from the original ip_conntrack code
13 * net/ipv4/netfilter/ip_conntrack_proto_icmp.c which had the following
14 * copyright information:
15 * (C) 1999-2001 Paul `Rusty' Russell
16 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
17 */
18
19#include <linux/types.h>
20#include <linux/sched.h>
21#include <linux/timer.h>
22#include <linux/module.h>
23#include <linux/netfilter.h>
24#include <linux/in6.h>
25#include <linux/icmpv6.h>
26#include <linux/ipv6.h>
27#include <net/ipv6.h>
28#include <net/ip6_checksum.h>
29#include <linux/seq_file.h>
30#include <linux/netfilter_ipv6.h>
31#include <net/netfilter/nf_conntrack_tuple.h>
32#include <net/netfilter/nf_conntrack_protocol.h>
33#include <net/netfilter/nf_conntrack_core.h>
34#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
35
36unsigned long nf_ct_icmpv6_timeout = 30*HZ;
37
38#if 0
39#define DEBUGP printk
40#else
41#define DEBUGP(format, args...)
42#endif
43
44static int icmpv6_pkt_to_tuple(const struct sk_buff *skb,
45 unsigned int dataoff,
46 struct nf_conntrack_tuple *tuple)
47{
48 struct icmp6hdr _hdr, *hp;
49
50 hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
51 if (hp == NULL)
52 return 0;
53 tuple->dst.u.icmp.type = hp->icmp6_type;
54 tuple->src.u.icmp.id = hp->icmp6_identifier;
55 tuple->dst.u.icmp.code = hp->icmp6_code;
56
57 return 1;
58}
59
60static int icmpv6_invert_tuple(struct nf_conntrack_tuple *tuple,
61 const struct nf_conntrack_tuple *orig)
62{
63 /* Add 1; spaces filled with 0. */
64 static u_int8_t invmap[] = {
65 [ICMPV6_ECHO_REQUEST - 128] = ICMPV6_ECHO_REPLY + 1,
66 [ICMPV6_ECHO_REPLY - 128] = ICMPV6_ECHO_REQUEST + 1,
67 [ICMPV6_NI_QUERY - 128] = ICMPV6_NI_QUERY + 1,
68 [ICMPV6_NI_REPLY - 128] = ICMPV6_NI_REPLY +1
69 };
70
71 __u8 type = orig->dst.u.icmp.type - 128;
72 if (type >= sizeof(invmap) || !invmap[type])
73 return 0;
74
75 tuple->src.u.icmp.id = orig->src.u.icmp.id;
76 tuple->dst.u.icmp.type = invmap[type] - 1;
77 tuple->dst.u.icmp.code = orig->dst.u.icmp.code;
78 return 1;
79}
80
81/* Print out the per-protocol part of the tuple. */
82static int icmpv6_print_tuple(struct seq_file *s,
83 const struct nf_conntrack_tuple *tuple)
84{
85 return seq_printf(s, "type=%u code=%u id=%u ",
86 tuple->dst.u.icmp.type,
87 tuple->dst.u.icmp.code,
88 ntohs(tuple->src.u.icmp.id));
89}
90
91/* Print out the private part of the conntrack. */
92static int icmpv6_print_conntrack(struct seq_file *s,
93 const struct nf_conn *conntrack)
94{
95 return 0;
96}
97
98/* Returns verdict for packet, or -1 for invalid. */
99static int icmpv6_packet(struct nf_conn *ct,
100 const struct sk_buff *skb,
101 unsigned int dataoff,
102 enum ip_conntrack_info ctinfo,
103 int pf,
104 unsigned int hooknum)
105{
106 /* Try to delete connection immediately after all replies:
107 won't actually vanish as we still have skb, and del_timer
108 means this will only run once even if count hits zero twice
109 (theoretically possible with SMP) */
110 if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY) {
111 if (atomic_dec_and_test(&ct->proto.icmp.count)
112 && del_timer(&ct->timeout))
113 ct->timeout.function((unsigned long)ct);
114 } else {
115 atomic_inc(&ct->proto.icmp.count);
116 nf_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, skb);
117 nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_icmpv6_timeout);
118 }
119
120 return NF_ACCEPT;
121}
122
123/* Called when a new connection for this protocol found. */
124static int icmpv6_new(struct nf_conn *conntrack,
125 const struct sk_buff *skb,
126 unsigned int dataoff)
127{
128 static u_int8_t valid_new[] = {
129 [ICMPV6_ECHO_REQUEST - 128] = 1,
130 [ICMPV6_NI_QUERY - 128] = 1
131 };
132
133 if (conntrack->tuplehash[0].tuple.dst.u.icmp.type - 128 >= sizeof(valid_new)
134 || !valid_new[conntrack->tuplehash[0].tuple.dst.u.icmp.type - 128]) {
135 /* Can't create a new ICMPv6 `conn' with this. */
136 DEBUGP("icmp: can't create new conn with type %u\n",
137 conntrack->tuplehash[0].tuple.dst.u.icmp.type);
138 NF_CT_DUMP_TUPLE(&conntrack->tuplehash[0].tuple);
139 return 0;
140 }
141 atomic_set(&conntrack->proto.icmp.count, 0);
142 return 1;
143}
144
145extern int
146nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start, u8 *nexthdrp, int len);
147extern struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6;
148static int
149icmpv6_error_message(struct sk_buff *skb,
150 unsigned int icmp6off,
151 enum ip_conntrack_info *ctinfo,
152 unsigned int hooknum)
153{
154 struct nf_conntrack_tuple intuple, origtuple;
155 struct nf_conntrack_tuple_hash *h;
156 struct icmp6hdr _hdr, *hp;
157 unsigned int inip6off;
158 struct nf_conntrack_protocol *inproto;
159 u_int8_t inprotonum;
160 unsigned int inprotoff;
161
162 NF_CT_ASSERT(skb->nfct == NULL);
163
164 hp = skb_header_pointer(skb, icmp6off, sizeof(_hdr), &_hdr);
165 if (hp == NULL) {
166 DEBUGP("icmpv6_error: Can't get ICMPv6 hdr.\n");
167 return -NF_ACCEPT;
168 }
169
170 inip6off = icmp6off + sizeof(_hdr);
171 if (skb_copy_bits(skb, inip6off+offsetof(struct ipv6hdr, nexthdr),
172 &inprotonum, sizeof(inprotonum)) != 0) {
173 DEBUGP("icmpv6_error: Can't get nexthdr in inner IPv6 header.\n");
174 return -NF_ACCEPT;
175 }
176 inprotoff = nf_ct_ipv6_skip_exthdr(skb,
177 inip6off + sizeof(struct ipv6hdr),
178 &inprotonum,
179 skb->len - inip6off
180 - sizeof(struct ipv6hdr));
181
182 if ((inprotoff < 0) || (inprotoff > skb->len) ||
183 (inprotonum == NEXTHDR_FRAGMENT)) {
184 DEBUGP("icmpv6_error: Can't get protocol header in ICMPv6 payload.\n");
185 return -NF_ACCEPT;
186 }
187
188 inproto = nf_ct_find_proto(PF_INET6, inprotonum);
189
190 /* Are they talking about one of our connections? */
191 if (!nf_ct_get_tuple(skb, inip6off, inprotoff, PF_INET6, inprotonum,
192 &origtuple, &nf_conntrack_l3proto_ipv6, inproto)) {
193 DEBUGP("icmpv6_error: Can't get tuple\n");
194 return -NF_ACCEPT;
195 }
196
197 /* Ordinarily, we'd expect the inverted tupleproto, but it's
198 been preserved inside the ICMP. */
199 if (!nf_ct_invert_tuple(&intuple, &origtuple,
200 &nf_conntrack_l3proto_ipv6, inproto)) {
201 DEBUGP("icmpv6_error: Can't invert tuple\n");
202 return -NF_ACCEPT;
203 }
204
205 *ctinfo = IP_CT_RELATED;
206
207 h = nf_conntrack_find_get(&intuple, NULL);
208 if (!h) {
209 DEBUGP("icmpv6_error: no match\n");
210 return -NF_ACCEPT;
211 } else {
212 if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY)
213 *ctinfo += IP_CT_IS_REPLY;
214 }
215
216 /* Update skb to refer to this connection */
217 skb->nfct = &nf_ct_tuplehash_to_ctrack(h)->ct_general;
218 skb->nfctinfo = *ctinfo;
219 return -NF_ACCEPT;
220}
221
222static int
223icmpv6_error(struct sk_buff *skb, unsigned int dataoff,
224 enum ip_conntrack_info *ctinfo, int pf, unsigned int hooknum)
225{
226 struct icmp6hdr _ih, *icmp6h;
227
228 icmp6h = skb_header_pointer(skb, dataoff, sizeof(_ih), &_ih);
229 if (icmp6h == NULL) {
230 if (LOG_INVALID(IPPROTO_ICMPV6))
231 nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL,
232 "nf_ct_icmpv6: short packet ");
233 return -NF_ACCEPT;
234 }
235
236 if (hooknum != NF_IP6_PRE_ROUTING)
237 goto skipped;
238
239 /* Ignore it if the checksum's bogus. */
240 if (csum_ipv6_magic(&skb->nh.ipv6h->saddr, &skb->nh.ipv6h->daddr,
241 skb->len - dataoff, IPPROTO_ICMPV6,
242 skb_checksum(skb, dataoff,
243 skb->len - dataoff, 0))) {
244 nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL,
245 "nf_ct_icmpv6: ICMPv6 checksum failed\n");
246 return -NF_ACCEPT;
247 }
248
249skipped:
250
251 /* is not error message ? */
252 if (icmp6h->icmp6_type >= 128)
253 return NF_ACCEPT;
254
255 return icmpv6_error_message(skb, dataoff, ctinfo, hooknum);
256}
257
258struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6 =
259{
260 .l3proto = PF_INET6,
261 .proto = IPPROTO_ICMPV6,
262 .name = "icmpv6",
263 .pkt_to_tuple = icmpv6_pkt_to_tuple,
264 .invert_tuple = icmpv6_invert_tuple,
265 .print_tuple = icmpv6_print_tuple,
266 .print_conntrack = icmpv6_print_conntrack,
267 .packet = icmpv6_packet,
268 .new = icmpv6_new,
269 .error = icmpv6_error,
270};
271
272EXPORT_SYMBOL(nf_conntrack_protocol_icmpv6);
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
new file mode 100644
index 000000000000..7640b9bb7694
--- /dev/null
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -0,0 +1,885 @@
1/*
2 * IPv6 fragment reassembly for connection tracking
3 *
4 * Copyright (C)2004 USAGI/WIDE Project
5 *
6 * Author:
7 * Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
8 *
9 * Based on: net/ipv6/reassembly.c
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16
17#include <linux/config.h>
18#include <linux/errno.h>
19#include <linux/types.h>
20#include <linux/string.h>
21#include <linux/socket.h>
22#include <linux/sockios.h>
23#include <linux/jiffies.h>
24#include <linux/net.h>
25#include <linux/list.h>
26#include <linux/netdevice.h>
27#include <linux/in6.h>
28#include <linux/ipv6.h>
29#include <linux/icmpv6.h>
30#include <linux/random.h>
31#include <linux/jhash.h>
32
33#include <net/sock.h>
34#include <net/snmp.h>
35
36#include <net/ipv6.h>
37#include <net/protocol.h>
38#include <net/transp_v6.h>
39#include <net/rawv6.h>
40#include <net/ndisc.h>
41#include <net/addrconf.h>
42#include <linux/sysctl.h>
43#include <linux/netfilter.h>
44#include <linux/netfilter_ipv6.h>
45#include <linux/kernel.h>
46#include <linux/module.h>
47
48#if 0
49#define DEBUGP printk
50#else
51#define DEBUGP(format, args...)
52#endif
53
54#define NF_CT_FRAG6_HIGH_THRESH 262144 /* == 256*1024 */
55#define NF_CT_FRAG6_LOW_THRESH 196608 /* == 192*1024 */
56#define NF_CT_FRAG6_TIMEOUT IPV6_FRAG_TIMEOUT
57
58int nf_ct_frag6_high_thresh = 256*1024;
59int nf_ct_frag6_low_thresh = 192*1024;
60int nf_ct_frag6_timeout = IPV6_FRAG_TIMEOUT;
61
62struct nf_ct_frag6_skb_cb
63{
64 struct inet6_skb_parm h;
65 int offset;
66 struct sk_buff *orig;
67};
68
69#define NFCT_FRAG6_CB(skb) ((struct nf_ct_frag6_skb_cb*)((skb)->cb))
70
71struct nf_ct_frag6_queue
72{
73 struct nf_ct_frag6_queue *next;
74 struct list_head lru_list; /* lru list member */
75
76 __u32 id; /* fragment id */
77 struct in6_addr saddr;
78 struct in6_addr daddr;
79
80 spinlock_t lock;
81 atomic_t refcnt;
82 struct timer_list timer; /* expire timer */
83 struct sk_buff *fragments;
84 int len;
85 int meat;
86 struct timeval stamp;
87 unsigned int csum;
88 __u8 last_in; /* has first/last segment arrived? */
89#define COMPLETE 4
90#define FIRST_IN 2
91#define LAST_IN 1
92 __u16 nhoffset;
93 struct nf_ct_frag6_queue **pprev;
94};
95
96/* Hash table. */
97
98#define FRAG6Q_HASHSZ 64
99
100static struct nf_ct_frag6_queue *nf_ct_frag6_hash[FRAG6Q_HASHSZ];
101static rwlock_t nf_ct_frag6_lock = RW_LOCK_UNLOCKED;
102static u32 nf_ct_frag6_hash_rnd;
103static LIST_HEAD(nf_ct_frag6_lru_list);
104int nf_ct_frag6_nqueues = 0;
105
106static __inline__ void __fq_unlink(struct nf_ct_frag6_queue *fq)
107{
108 if (fq->next)
109 fq->next->pprev = fq->pprev;
110 *fq->pprev = fq->next;
111 list_del(&fq->lru_list);
112 nf_ct_frag6_nqueues--;
113}
114
115static __inline__ void fq_unlink(struct nf_ct_frag6_queue *fq)
116{
117 write_lock(&nf_ct_frag6_lock);
118 __fq_unlink(fq);
119 write_unlock(&nf_ct_frag6_lock);
120}
121
122static unsigned int ip6qhashfn(u32 id, struct in6_addr *saddr,
123 struct in6_addr *daddr)
124{
125 u32 a, b, c;
126
127 a = saddr->s6_addr32[0];
128 b = saddr->s6_addr32[1];
129 c = saddr->s6_addr32[2];
130
131 a += JHASH_GOLDEN_RATIO;
132 b += JHASH_GOLDEN_RATIO;
133 c += nf_ct_frag6_hash_rnd;
134 __jhash_mix(a, b, c);
135
136 a += saddr->s6_addr32[3];
137 b += daddr->s6_addr32[0];
138 c += daddr->s6_addr32[1];
139 __jhash_mix(a, b, c);
140
141 a += daddr->s6_addr32[2];
142 b += daddr->s6_addr32[3];
143 c += id;
144 __jhash_mix(a, b, c);
145
146 return c & (FRAG6Q_HASHSZ - 1);
147}
148
149static struct timer_list nf_ct_frag6_secret_timer;
150int nf_ct_frag6_secret_interval = 10 * 60 * HZ;
151
152static void nf_ct_frag6_secret_rebuild(unsigned long dummy)
153{
154 unsigned long now = jiffies;
155 int i;
156
157 write_lock(&nf_ct_frag6_lock);
158 get_random_bytes(&nf_ct_frag6_hash_rnd, sizeof(u32));
159 for (i = 0; i < FRAG6Q_HASHSZ; i++) {
160 struct nf_ct_frag6_queue *q;
161
162 q = nf_ct_frag6_hash[i];
163 while (q) {
164 struct nf_ct_frag6_queue *next = q->next;
165 unsigned int hval = ip6qhashfn(q->id,
166 &q->saddr,
167 &q->daddr);
168
169 if (hval != i) {
170 /* Unlink. */
171 if (q->next)
172 q->next->pprev = q->pprev;
173 *q->pprev = q->next;
174
175 /* Relink to new hash chain. */
176 if ((q->next = nf_ct_frag6_hash[hval]) != NULL)
177 q->next->pprev = &q->next;
178 nf_ct_frag6_hash[hval] = q;
179 q->pprev = &nf_ct_frag6_hash[hval];
180 }
181
182 q = next;
183 }
184 }
185 write_unlock(&nf_ct_frag6_lock);
186
187 mod_timer(&nf_ct_frag6_secret_timer, now + nf_ct_frag6_secret_interval);
188}
189
190atomic_t nf_ct_frag6_mem = ATOMIC_INIT(0);
191
192/* Memory Tracking Functions. */
193static inline void frag_kfree_skb(struct sk_buff *skb)
194{
195 atomic_sub(skb->truesize, &nf_ct_frag6_mem);
196 if (NFCT_FRAG6_CB(skb)->orig)
197 kfree_skb(NFCT_FRAG6_CB(skb)->orig);
198
199 kfree_skb(skb);
200}
201
202static inline void frag_free_queue(struct nf_ct_frag6_queue *fq)
203{
204 atomic_sub(sizeof(struct nf_ct_frag6_queue), &nf_ct_frag6_mem);
205 kfree(fq);
206}
207
208static inline struct nf_ct_frag6_queue *frag_alloc_queue(void)
209{
210 struct nf_ct_frag6_queue *fq = kmalloc(sizeof(struct nf_ct_frag6_queue), GFP_ATOMIC);
211
212 if (!fq)
213 return NULL;
214 atomic_add(sizeof(struct nf_ct_frag6_queue), &nf_ct_frag6_mem);
215 return fq;
216}
217
218/* Destruction primitives. */
219
220/* Complete destruction of fq. */
221static void nf_ct_frag6_destroy(struct nf_ct_frag6_queue *fq)
222{
223 struct sk_buff *fp;
224
225 BUG_TRAP(fq->last_in&COMPLETE);
226 BUG_TRAP(del_timer(&fq->timer) == 0);
227
228 /* Release all fragment data. */
229 fp = fq->fragments;
230 while (fp) {
231 struct sk_buff *xp = fp->next;
232
233 frag_kfree_skb(fp);
234 fp = xp;
235 }
236
237 frag_free_queue(fq);
238}
239
240static __inline__ void fq_put(struct nf_ct_frag6_queue *fq)
241{
242 if (atomic_dec_and_test(&fq->refcnt))
243 nf_ct_frag6_destroy(fq);
244}
245
246/* Kill fq entry. It is not destroyed immediately,
247 * because caller (and someone more) holds reference count.
248 */
249static __inline__ void fq_kill(struct nf_ct_frag6_queue *fq)
250{
251 if (del_timer(&fq->timer))
252 atomic_dec(&fq->refcnt);
253
254 if (!(fq->last_in & COMPLETE)) {
255 fq_unlink(fq);
256 atomic_dec(&fq->refcnt);
257 fq->last_in |= COMPLETE;
258 }
259}
260
261static void nf_ct_frag6_evictor(void)
262{
263 struct nf_ct_frag6_queue *fq;
264 struct list_head *tmp;
265
266 for (;;) {
267 if (atomic_read(&nf_ct_frag6_mem) <= nf_ct_frag6_low_thresh)
268 return;
269 read_lock(&nf_ct_frag6_lock);
270 if (list_empty(&nf_ct_frag6_lru_list)) {
271 read_unlock(&nf_ct_frag6_lock);
272 return;
273 }
274 tmp = nf_ct_frag6_lru_list.next;
275 fq = list_entry(tmp, struct nf_ct_frag6_queue, lru_list);
276 atomic_inc(&fq->refcnt);
277 read_unlock(&nf_ct_frag6_lock);
278
279 spin_lock(&fq->lock);
280 if (!(fq->last_in&COMPLETE))
281 fq_kill(fq);
282 spin_unlock(&fq->lock);
283
284 fq_put(fq);
285 }
286}
287
288static void nf_ct_frag6_expire(unsigned long data)
289{
290 struct nf_ct_frag6_queue *fq = (struct nf_ct_frag6_queue *) data;
291
292 spin_lock(&fq->lock);
293
294 if (fq->last_in & COMPLETE)
295 goto out;
296
297 fq_kill(fq);
298
299out:
300 spin_unlock(&fq->lock);
301 fq_put(fq);
302}
303
304/* Creation primitives. */
305
306
307static struct nf_ct_frag6_queue *nf_ct_frag6_intern(unsigned int hash,
308 struct nf_ct_frag6_queue *fq_in)
309{
310 struct nf_ct_frag6_queue *fq;
311
312 write_lock(&nf_ct_frag6_lock);
313#ifdef CONFIG_SMP
314 for (fq = nf_ct_frag6_hash[hash]; fq; fq = fq->next) {
315 if (fq->id == fq_in->id &&
316 !ipv6_addr_cmp(&fq_in->saddr, &fq->saddr) &&
317 !ipv6_addr_cmp(&fq_in->daddr, &fq->daddr)) {
318 atomic_inc(&fq->refcnt);
319 write_unlock(&nf_ct_frag6_lock);
320 fq_in->last_in |= COMPLETE;
321 fq_put(fq_in);
322 return fq;
323 }
324 }
325#endif
326 fq = fq_in;
327
328 if (!mod_timer(&fq->timer, jiffies + nf_ct_frag6_timeout))
329 atomic_inc(&fq->refcnt);
330
331 atomic_inc(&fq->refcnt);
332 if ((fq->next = nf_ct_frag6_hash[hash]) != NULL)
333 fq->next->pprev = &fq->next;
334 nf_ct_frag6_hash[hash] = fq;
335 fq->pprev = &nf_ct_frag6_hash[hash];
336 INIT_LIST_HEAD(&fq->lru_list);
337 list_add_tail(&fq->lru_list, &nf_ct_frag6_lru_list);
338 nf_ct_frag6_nqueues++;
339 write_unlock(&nf_ct_frag6_lock);
340 return fq;
341}
342
343
344static struct nf_ct_frag6_queue *
345nf_ct_frag6_create(unsigned int hash, u32 id, struct in6_addr *src, struct in6_addr *dst)
346{
347 struct nf_ct_frag6_queue *fq;
348
349 if ((fq = frag_alloc_queue()) == NULL) {
350 DEBUGP("Can't alloc new queue\n");
351 goto oom;
352 }
353
354 memset(fq, 0, sizeof(struct nf_ct_frag6_queue));
355
356 fq->id = id;
357 ipv6_addr_copy(&fq->saddr, src);
358 ipv6_addr_copy(&fq->daddr, dst);
359
360 init_timer(&fq->timer);
361 fq->timer.function = nf_ct_frag6_expire;
362 fq->timer.data = (long) fq;
363 fq->lock = SPIN_LOCK_UNLOCKED;
364 atomic_set(&fq->refcnt, 1);
365
366 return nf_ct_frag6_intern(hash, fq);
367
368oom:
369 return NULL;
370}
371
372static __inline__ struct nf_ct_frag6_queue *
373fq_find(u32 id, struct in6_addr *src, struct in6_addr *dst)
374{
375 struct nf_ct_frag6_queue *fq;
376 unsigned int hash = ip6qhashfn(id, src, dst);
377
378 read_lock(&nf_ct_frag6_lock);
379 for (fq = nf_ct_frag6_hash[hash]; fq; fq = fq->next) {
380 if (fq->id == id &&
381 !ipv6_addr_cmp(src, &fq->saddr) &&
382 !ipv6_addr_cmp(dst, &fq->daddr)) {
383 atomic_inc(&fq->refcnt);
384 read_unlock(&nf_ct_frag6_lock);
385 return fq;
386 }
387 }
388 read_unlock(&nf_ct_frag6_lock);
389
390 return nf_ct_frag6_create(hash, id, src, dst);
391}
392
393
394static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb,
395 struct frag_hdr *fhdr, int nhoff)
396{
397 struct sk_buff *prev, *next;
398 int offset, end;
399
400 if (fq->last_in & COMPLETE) {
401 DEBUGP("Allready completed\n");
402 goto err;
403 }
404
405 offset = ntohs(fhdr->frag_off) & ~0x7;
406 end = offset + (ntohs(skb->nh.ipv6h->payload_len) -
407 ((u8 *) (fhdr + 1) - (u8 *) (skb->nh.ipv6h + 1)));
408
409 if ((unsigned int)end > IPV6_MAXPLEN) {
410 DEBUGP("offset is too large.\n");
411 return -1;
412 }
413
414 if (skb->ip_summed == CHECKSUM_HW)
415 skb->csum = csum_sub(skb->csum,
416 csum_partial(skb->nh.raw,
417 (u8*)(fhdr + 1) - skb->nh.raw,
418 0));
419
420 /* Is this the final fragment? */
421 if (!(fhdr->frag_off & htons(IP6_MF))) {
422 /* If we already have some bits beyond end
423 * or have different end, the segment is corrupted.
424 */
425 if (end < fq->len ||
426 ((fq->last_in & LAST_IN) && end != fq->len)) {
427 DEBUGP("already received last fragment\n");
428 goto err;
429 }
430 fq->last_in |= LAST_IN;
431 fq->len = end;
432 } else {
433 /* Check if the fragment is rounded to 8 bytes.
434 * Required by the RFC.
435 */
436 if (end & 0x7) {
437 /* RFC2460 says always send parameter problem in
438 * this case. -DaveM
439 */
440 DEBUGP("the end of this fragment is not rounded to 8 bytes.\n");
441 return -1;
442 }
443 if (end > fq->len) {
444 /* Some bits beyond end -> corruption. */
445 if (fq->last_in & LAST_IN) {
446 DEBUGP("last packet already reached.\n");
447 goto err;
448 }
449 fq->len = end;
450 }
451 }
452
453 if (end == offset)
454 goto err;
455
456 /* Point into the IP datagram 'data' part. */
457 if (!pskb_pull(skb, (u8 *) (fhdr + 1) - skb->data)) {
458 DEBUGP("queue: message is too short.\n");
459 goto err;
460 }
461 if (end-offset < skb->len) {
462 if (pskb_trim(skb, end - offset)) {
463 DEBUGP("Can't trim\n");
464 goto err;
465 }
466 if (skb->ip_summed != CHECKSUM_UNNECESSARY)
467 skb->ip_summed = CHECKSUM_NONE;
468 }
469
470 /* Find out which fragments are in front and at the back of us
471 * in the chain of fragments so far. We must know where to put
472 * this fragment, right?
473 */
474 prev = NULL;
475 for (next = fq->fragments; next != NULL; next = next->next) {
476 if (NFCT_FRAG6_CB(next)->offset >= offset)
477 break; /* bingo! */
478 prev = next;
479 }
480
481 /* We found where to put this one. Check for overlap with
482 * preceding fragment, and, if needed, align things so that
483 * any overlaps are eliminated.
484 */
485 if (prev) {
486 int i = (NFCT_FRAG6_CB(prev)->offset + prev->len) - offset;
487
488 if (i > 0) {
489 offset += i;
490 if (end <= offset) {
491 DEBUGP("overlap\n");
492 goto err;
493 }
494 if (!pskb_pull(skb, i)) {
495 DEBUGP("Can't pull\n");
496 goto err;
497 }
498 if (skb->ip_summed != CHECKSUM_UNNECESSARY)
499 skb->ip_summed = CHECKSUM_NONE;
500 }
501 }
502
503 /* Look for overlap with succeeding segments.
504 * If we can merge fragments, do it.
505 */
506 while (next && NFCT_FRAG6_CB(next)->offset < end) {
507 /* overlap is 'i' bytes */
508 int i = end - NFCT_FRAG6_CB(next)->offset;
509
510 if (i < next->len) {
511 /* Eat head of the next overlapped fragment
512 * and leave the loop. The next ones cannot overlap.
513 */
514 DEBUGP("Eat head of the overlapped parts.: %d", i);
515 if (!pskb_pull(next, i))
516 goto err;
517
518 /* next fragment */
519 NFCT_FRAG6_CB(next)->offset += i;
520 fq->meat -= i;
521 if (next->ip_summed != CHECKSUM_UNNECESSARY)
522 next->ip_summed = CHECKSUM_NONE;
523 break;
524 } else {
525 struct sk_buff *free_it = next;
526
527 /* Old fragmnet is completely overridden with
528 * new one drop it.
529 */
530 next = next->next;
531
532 if (prev)
533 prev->next = next;
534 else
535 fq->fragments = next;
536
537 fq->meat -= free_it->len;
538 frag_kfree_skb(free_it);
539 }
540 }
541
542 NFCT_FRAG6_CB(skb)->offset = offset;
543
544 /* Insert this fragment in the chain of fragments. */
545 skb->next = next;
546 if (prev)
547 prev->next = skb;
548 else
549 fq->fragments = skb;
550
551 skb->dev = NULL;
552 skb_get_timestamp(skb, &fq->stamp);
553 fq->meat += skb->len;
554 atomic_add(skb->truesize, &nf_ct_frag6_mem);
555
556 /* The first fragment.
557 * nhoffset is obtained from the first fragment, of course.
558 */
559 if (offset == 0) {
560 fq->nhoffset = nhoff;
561 fq->last_in |= FIRST_IN;
562 }
563 write_lock(&nf_ct_frag6_lock);
564 list_move_tail(&fq->lru_list, &nf_ct_frag6_lru_list);
565 write_unlock(&nf_ct_frag6_lock);
566 return 0;
567
568err:
569 return -1;
570}
571
572/*
573 * Check if this packet is complete.
574 * Returns NULL on failure by any reason, and pointer
575 * to current nexthdr field in reassembled frame.
576 *
577 * It is called with locked fq, and caller must check that
578 * queue is eligible for reassembly i.e. it is not COMPLETE,
579 * the last and the first frames arrived and all the bits are here.
580 */
581static struct sk_buff *
582nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
583{
584 struct sk_buff *fp, *op, *head = fq->fragments;
585 int payload_len;
586
587 fq_kill(fq);
588
589 BUG_TRAP(head != NULL);
590 BUG_TRAP(NFCT_FRAG6_CB(head)->offset == 0);
591
592 /* Unfragmented part is taken from the first segment. */
593 payload_len = (head->data - head->nh.raw) - sizeof(struct ipv6hdr) + fq->len - sizeof(struct frag_hdr);
594 if (payload_len > IPV6_MAXPLEN) {
595 DEBUGP("payload len is too large.\n");
596 goto out_oversize;
597 }
598
599 /* Head of list must not be cloned. */
600 if (skb_cloned(head) && pskb_expand_head(head, 0, 0, GFP_ATOMIC)) {
601 DEBUGP("skb is cloned but can't expand head");
602 goto out_oom;
603 }
604
605 /* If the first fragment is fragmented itself, we split
606 * it to two chunks: the first with data and paged part
607 * and the second, holding only fragments. */
608 if (skb_shinfo(head)->frag_list) {
609 struct sk_buff *clone;
610 int i, plen = 0;
611
612 if ((clone = alloc_skb(0, GFP_ATOMIC)) == NULL) {
613 DEBUGP("Can't alloc skb\n");
614 goto out_oom;
615 }
616 clone->next = head->next;
617 head->next = clone;
618 skb_shinfo(clone)->frag_list = skb_shinfo(head)->frag_list;
619 skb_shinfo(head)->frag_list = NULL;
620 for (i=0; i<skb_shinfo(head)->nr_frags; i++)
621 plen += skb_shinfo(head)->frags[i].size;
622 clone->len = clone->data_len = head->data_len - plen;
623 head->data_len -= clone->len;
624 head->len -= clone->len;
625 clone->csum = 0;
626 clone->ip_summed = head->ip_summed;
627
628 NFCT_FRAG6_CB(clone)->orig = NULL;
629 atomic_add(clone->truesize, &nf_ct_frag6_mem);
630 }
631
632 /* We have to remove fragment header from datagram and to relocate
633 * header in order to calculate ICV correctly. */
634 head->nh.raw[fq->nhoffset] = head->h.raw[0];
635 memmove(head->head + sizeof(struct frag_hdr), head->head,
636 (head->data - head->head) - sizeof(struct frag_hdr));
637 head->mac.raw += sizeof(struct frag_hdr);
638 head->nh.raw += sizeof(struct frag_hdr);
639
640 skb_shinfo(head)->frag_list = head->next;
641 head->h.raw = head->data;
642 skb_push(head, head->data - head->nh.raw);
643 atomic_sub(head->truesize, &nf_ct_frag6_mem);
644
645 for (fp=head->next; fp; fp = fp->next) {
646 head->data_len += fp->len;
647 head->len += fp->len;
648 if (head->ip_summed != fp->ip_summed)
649 head->ip_summed = CHECKSUM_NONE;
650 else if (head->ip_summed == CHECKSUM_HW)
651 head->csum = csum_add(head->csum, fp->csum);
652 head->truesize += fp->truesize;
653 atomic_sub(fp->truesize, &nf_ct_frag6_mem);
654 }
655
656 head->next = NULL;
657 head->dev = dev;
658 skb_set_timestamp(head, &fq->stamp);
659 head->nh.ipv6h->payload_len = htons(payload_len);
660
661 /* Yes, and fold redundant checksum back. 8) */
662 if (head->ip_summed == CHECKSUM_HW)
663 head->csum = csum_partial(head->nh.raw, head->h.raw-head->nh.raw, head->csum);
664
665 fq->fragments = NULL;
666
667 /* all original skbs are linked into the NFCT_FRAG6_CB(head).orig */
668 fp = skb_shinfo(head)->frag_list;
669 if (NFCT_FRAG6_CB(fp)->orig == NULL)
670 /* at above code, head skb is divided into two skbs. */
671 fp = fp->next;
672
673 op = NFCT_FRAG6_CB(head)->orig;
674 for (; fp; fp = fp->next) {
675 struct sk_buff *orig = NFCT_FRAG6_CB(fp)->orig;
676
677 op->next = orig;
678 op = orig;
679 NFCT_FRAG6_CB(fp)->orig = NULL;
680 }
681
682 return head;
683
684out_oversize:
685 if (net_ratelimit())
686 printk(KERN_DEBUG "nf_ct_frag6_reasm: payload len = %d\n", payload_len);
687 goto out_fail;
688out_oom:
689 if (net_ratelimit())
690 printk(KERN_DEBUG "nf_ct_frag6_reasm: no memory for reassembly\n");
691out_fail:
692 return NULL;
693}
694
695/*
696 * find the header just before Fragment Header.
697 *
698 * if success return 0 and set ...
699 * (*prevhdrp): the value of "Next Header Field" in the header
700 * just before Fragment Header.
701 * (*prevhoff): the offset of "Next Header Field" in the header
702 * just before Fragment Header.
703 * (*fhoff) : the offset of Fragment Header.
704 *
705 * Based on ipv6_skip_hdr() in net/ipv6/exthdr.c
706 *
707 */
708static int
709find_prev_fhdr(struct sk_buff *skb, u8 *prevhdrp, int *prevhoff, int *fhoff)
710{
711 u8 nexthdr = skb->nh.ipv6h->nexthdr;
712 u8 prev_nhoff = (u8 *)&skb->nh.ipv6h->nexthdr - skb->data;
713 int start = (u8 *)(skb->nh.ipv6h+1) - skb->data;
714 int len = skb->len - start;
715 u8 prevhdr = NEXTHDR_IPV6;
716
717 while (nexthdr != NEXTHDR_FRAGMENT) {
718 struct ipv6_opt_hdr hdr;
719 int hdrlen;
720
721 if (!ipv6_ext_hdr(nexthdr)) {
722 return -1;
723 }
724 if (len < (int)sizeof(struct ipv6_opt_hdr)) {
725 DEBUGP("too short\n");
726 return -1;
727 }
728 if (nexthdr == NEXTHDR_NONE) {
729 DEBUGP("next header is none\n");
730 return -1;
731 }
732 if (skb_copy_bits(skb, start, &hdr, sizeof(hdr)))
733 BUG();
734 if (nexthdr == NEXTHDR_AUTH)
735 hdrlen = (hdr.hdrlen+2)<<2;
736 else
737 hdrlen = ipv6_optlen(&hdr);
738
739 prevhdr = nexthdr;
740 prev_nhoff = start;
741
742 nexthdr = hdr.nexthdr;
743 len -= hdrlen;
744 start += hdrlen;
745 }
746
747 if (len < 0)
748 return -1;
749
750 *prevhdrp = prevhdr;
751 *prevhoff = prev_nhoff;
752 *fhoff = start;
753
754 return 0;
755}
756
757struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb)
758{
759 struct sk_buff *clone;
760 struct net_device *dev = skb->dev;
761 struct frag_hdr *fhdr;
762 struct nf_ct_frag6_queue *fq;
763 struct ipv6hdr *hdr;
764 int fhoff, nhoff;
765 u8 prevhdr;
766 struct sk_buff *ret_skb = NULL;
767
768 /* Jumbo payload inhibits frag. header */
769 if (skb->nh.ipv6h->payload_len == 0) {
770 DEBUGP("payload len = 0\n");
771 return skb;
772 }
773
774 if (find_prev_fhdr(skb, &prevhdr, &nhoff, &fhoff) < 0)
775 return skb;
776
777 clone = skb_clone(skb, GFP_ATOMIC);
778 if (clone == NULL) {
779 DEBUGP("Can't clone skb\n");
780 return skb;
781 }
782
783 NFCT_FRAG6_CB(clone)->orig = skb;
784
785 if (!pskb_may_pull(clone, fhoff + sizeof(*fhdr))) {
786 DEBUGP("message is too short.\n");
787 goto ret_orig;
788 }
789
790 clone->h.raw = clone->data + fhoff;
791 hdr = clone->nh.ipv6h;
792 fhdr = (struct frag_hdr *)clone->h.raw;
793
794 if (!(fhdr->frag_off & htons(0xFFF9))) {
795 DEBUGP("Invalid fragment offset\n");
796 /* It is not a fragmented frame */
797 goto ret_orig;
798 }
799
800 if (atomic_read(&nf_ct_frag6_mem) > nf_ct_frag6_high_thresh)
801 nf_ct_frag6_evictor();
802
803 fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr);
804 if (fq == NULL) {
805 DEBUGP("Can't find and can't create new queue\n");
806 goto ret_orig;
807 }
808
809 spin_lock(&fq->lock);
810
811 if (nf_ct_frag6_queue(fq, clone, fhdr, nhoff) < 0) {
812 spin_unlock(&fq->lock);
813 DEBUGP("Can't insert skb to queue\n");
814 fq_put(fq);
815 goto ret_orig;
816 }
817
818 if (fq->last_in == (FIRST_IN|LAST_IN) && fq->meat == fq->len) {
819 ret_skb = nf_ct_frag6_reasm(fq, dev);
820 if (ret_skb == NULL)
821 DEBUGP("Can't reassemble fragmented packets\n");
822 }
823 spin_unlock(&fq->lock);
824
825 fq_put(fq);
826 return ret_skb;
827
828ret_orig:
829 kfree_skb(clone);
830 return skb;
831}
832
833void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb,
834 struct net_device *in, struct net_device *out,
835 int (*okfn)(struct sk_buff *))
836{
837 struct sk_buff *s, *s2;
838
839 for (s = NFCT_FRAG6_CB(skb)->orig; s;) {
840 nf_conntrack_put_reasm(s->nfct_reasm);
841 nf_conntrack_get_reasm(skb);
842 s->nfct_reasm = skb;
843
844 s2 = s->next;
845 NF_HOOK_THRESH(PF_INET6, hooknum, s, in, out, okfn,
846 NF_IP6_PRI_CONNTRACK_DEFRAG + 1);
847 s = s2;
848 }
849 nf_conntrack_put_reasm(skb);
850}
851
852int nf_ct_frag6_kfree_frags(struct sk_buff *skb)
853{
854 struct sk_buff *s, *s2;
855
856 for (s = NFCT_FRAG6_CB(skb)->orig; s; s = s2) {
857
858 s2 = s->next;
859 kfree_skb(s);
860 }
861
862 kfree_skb(skb);
863
864 return 0;
865}
866
867int nf_ct_frag6_init(void)
868{
869 nf_ct_frag6_hash_rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
870 (jiffies ^ (jiffies >> 6)));
871
872 init_timer(&nf_ct_frag6_secret_timer);
873 nf_ct_frag6_secret_timer.function = nf_ct_frag6_secret_rebuild;
874 nf_ct_frag6_secret_timer.expires = jiffies
875 + nf_ct_frag6_secret_interval;
876 add_timer(&nf_ct_frag6_secret_timer);
877
878 return 0;
879}
880
881void nf_ct_frag6_cleanup(void)
882{
883 del_timer(&nf_ct_frag6_secret_timer);
884 nf_ct_frag6_evictor();
885}
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index a1265a320b11..651c79b41eeb 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -174,8 +174,10 @@ int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
174 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); 174 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
175 175
176 /* Not releasing hash table! */ 176 /* Not releasing hash table! */
177 if (clone) 177 if (clone) {
178 nf_reset(clone);
178 rawv6_rcv(sk, clone); 179 rawv6_rcv(sk, clone);
180 }
179 } 181 }
180 sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, 182 sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
181 IP6CB(skb)->iif); 183 IP6CB(skb)->iif);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-03 15:03:40 -0500