#include <linux/ipv6.h>
#include <linux/icmpv6.h>
#include <linux/random.h>
-#include <linux/jhash.h>
#include <net/sock.h>
#include <net/snmp.h>
+#include <net/inet_frag.h>
#include <net/ipv6.h>
#include <net/protocol.h>
#include <net/rawv6.h>
#include <net/ndisc.h>
#include <net/addrconf.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
#include <linux/sysctl.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
-
-#define NF_CT_FRAG6_HIGH_THRESH 262144 /* == 256*1024 */
-#define NF_CT_FRAG6_LOW_THRESH 196608 /* == 192*1024 */
-#define NF_CT_FRAG6_TIMEOUT IPV6_FRAG_TIMEOUT
-
-unsigned int nf_ct_frag6_high_thresh __read_mostly = 256*1024;
-unsigned int nf_ct_frag6_low_thresh __read_mostly = 192*1024;
-unsigned long nf_ct_frag6_timeout __read_mostly = IPV6_FRAG_TIMEOUT;
struct nf_ct_frag6_skb_cb
{
struct nf_ct_frag6_queue
{
- struct hlist_node list;
- struct list_head lru_list; /* lru list member */
+ struct inet_frag_queue q;
__be32 id; /* fragment id */
+ u32 user;
struct in6_addr saddr;
struct in6_addr daddr;
- spinlock_t lock;
- atomic_t refcnt;
- struct timer_list timer; /* expire timer */
- struct sk_buff *fragments;
- int len;
- int meat;
- struct timeval stamp;
unsigned int csum;
- __u8 last_in; /* has first/last segment arrived? */
-#define COMPLETE 4
-#define FIRST_IN 2
-#define LAST_IN 1
__u16 nhoffset;
};
-/* Hash table. */
-
-#define FRAG6Q_HASHSZ 64
-
-static struct hlist_head nf_ct_frag6_hash[FRAG6Q_HASHSZ];
-static DEFINE_RWLOCK(nf_ct_frag6_lock);
-static u32 nf_ct_frag6_hash_rnd;
-static LIST_HEAD(nf_ct_frag6_lru_list);
-int nf_ct_frag6_nqueues = 0;
-
-static __inline__ void __fq_unlink(struct nf_ct_frag6_queue *fq)
-{
- hlist_del(&fq->list);
- list_del(&fq->lru_list);
- nf_ct_frag6_nqueues--;
-}
-
-static __inline__ void fq_unlink(struct nf_ct_frag6_queue *fq)
-{
- write_lock(&nf_ct_frag6_lock);
- __fq_unlink(fq);
- write_unlock(&nf_ct_frag6_lock);
-}
+static struct inet_frags nf_frags;
+static struct netns_frags nf_init_frags;
+
+#ifdef CONFIG_SYSCTL
+struct ctl_table nf_ct_ipv6_sysctl_table[] = {
+ {
+ .procname = "nf_conntrack_frag6_timeout",
+ .data = &nf_init_frags.timeout,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_jiffies,
+ },
+ {
+ .procname = "nf_conntrack_frag6_low_thresh",
+ .data = &nf_init_frags.low_thresh,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "nf_conntrack_frag6_high_thresh",
+ .data = &nf_init_frags.high_thresh,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ { }
+};
+#endif
-static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
- struct in6_addr *daddr)
+static unsigned int nf_hashfn(struct inet_frag_queue *q)
{
- u32 a, b, c;
-
- a = (__force u32)saddr->s6_addr32[0];
- b = (__force u32)saddr->s6_addr32[1];
- c = (__force u32)saddr->s6_addr32[2];
-
- a += JHASH_GOLDEN_RATIO;
- b += JHASH_GOLDEN_RATIO;
- c += nf_ct_frag6_hash_rnd;
- __jhash_mix(a, b, c);
+ const struct nf_ct_frag6_queue *nq;
- a += (__force u32)saddr->s6_addr32[3];
- b += (__force u32)daddr->s6_addr32[0];
- c += (__force u32)daddr->s6_addr32[1];
- __jhash_mix(a, b, c);
-
- a += (__force u32)daddr->s6_addr32[2];
- b += (__force u32)daddr->s6_addr32[3];
- c += (__force u32)id;
- __jhash_mix(a, b, c);
-
- return c & (FRAG6Q_HASHSZ - 1);
+ nq = container_of(q, struct nf_ct_frag6_queue, q);
+ return inet6_hash_frag(nq->id, &nq->saddr, &nq->daddr, nf_frags.rnd);
}
-static struct timer_list nf_ct_frag6_secret_timer;
-int nf_ct_frag6_secret_interval = 10 * 60 * HZ;
-
-static void nf_ct_frag6_secret_rebuild(unsigned long dummy)
+static void nf_skb_free(struct sk_buff *skb)
{
- unsigned long now = jiffies;
- int i;
-
- write_lock(&nf_ct_frag6_lock);
- get_random_bytes(&nf_ct_frag6_hash_rnd, sizeof(u32));
- for (i = 0; i < FRAG6Q_HASHSZ; i++) {
- struct nf_ct_frag6_queue *q;
- struct hlist_node *p, *n;
-
- hlist_for_each_entry_safe(q, p, n, &nf_ct_frag6_hash[i], list) {
- unsigned int hval = ip6qhashfn(q->id,
- &q->saddr,
- &q->daddr);
- if (hval != i) {
- hlist_del(&q->list);
- /* Relink to new hash chain. */
- hlist_add_head(&q->list,
- &nf_ct_frag6_hash[hval]);
- }
- }
- }
- write_unlock(&nf_ct_frag6_lock);
-
- mod_timer(&nf_ct_frag6_secret_timer, now + nf_ct_frag6_secret_interval);
+ if (NFCT_FRAG6_CB(skb)->orig)
+ kfree_skb(NFCT_FRAG6_CB(skb)->orig);
}
-atomic_t nf_ct_frag6_mem = ATOMIC_INIT(0);
-
/* Memory Tracking Functions. */
static inline void frag_kfree_skb(struct sk_buff *skb, unsigned int *work)
{
if (work)
*work -= skb->truesize;
- atomic_sub(skb->truesize, &nf_ct_frag6_mem);
- if (NFCT_FRAG6_CB(skb)->orig)
- kfree_skb(NFCT_FRAG6_CB(skb)->orig);
-
+ atomic_sub(skb->truesize, &nf_init_frags.mem);
+ nf_skb_free(skb);
kfree_skb(skb);
}
-static inline void frag_free_queue(struct nf_ct_frag6_queue *fq,
- unsigned int *work)
-{
- if (work)
- *work -= sizeof(struct nf_ct_frag6_queue);
- atomic_sub(sizeof(struct nf_ct_frag6_queue), &nf_ct_frag6_mem);
- kfree(fq);
-}
-
-static inline struct nf_ct_frag6_queue *frag_alloc_queue(void)
-{
- struct nf_ct_frag6_queue *fq = kmalloc(sizeof(struct nf_ct_frag6_queue), GFP_ATOMIC);
-
- if (!fq)
- return NULL;
- atomic_add(sizeof(struct nf_ct_frag6_queue), &nf_ct_frag6_mem);
- return fq;
-}
-
/* Destruction primitives. */
-/* Complete destruction of fq. */
-static void nf_ct_frag6_destroy(struct nf_ct_frag6_queue *fq,
- unsigned int *work)
+static __inline__ void fq_put(struct nf_ct_frag6_queue *fq)
{
- struct sk_buff *fp;
-
- BUG_TRAP(fq->last_in&COMPLETE);
- BUG_TRAP(del_timer(&fq->timer) == 0);
-
- /* Release all fragment data. */
- fp = fq->fragments;
- while (fp) {
- struct sk_buff *xp = fp->next;
-
- frag_kfree_skb(fp, work);
- fp = xp;
- }
-
- frag_free_queue(fq, work);
-}
-
-static __inline__ void fq_put(struct nf_ct_frag6_queue *fq, unsigned int *work)
-{
- if (atomic_dec_and_test(&fq->refcnt))
- nf_ct_frag6_destroy(fq, work);
+ inet_frag_put(&fq->q, &nf_frags);
}
/* Kill fq entry. It is not destroyed immediately,
*/
static __inline__ void fq_kill(struct nf_ct_frag6_queue *fq)
{
- if (del_timer(&fq->timer))
- atomic_dec(&fq->refcnt);
-
- if (!(fq->last_in & COMPLETE)) {
- fq_unlink(fq);
- atomic_dec(&fq->refcnt);
- fq->last_in |= COMPLETE;
- }
+ inet_frag_kill(&fq->q, &nf_frags);
}
static void nf_ct_frag6_evictor(void)
{
- struct nf_ct_frag6_queue *fq;
- struct list_head *tmp;
- unsigned int work;
-
- work = atomic_read(&nf_ct_frag6_mem);
- if (work <= nf_ct_frag6_low_thresh)
- return;
-
- work -= nf_ct_frag6_low_thresh;
- while (work > 0) {
- read_lock(&nf_ct_frag6_lock);
- if (list_empty(&nf_ct_frag6_lru_list)) {
- read_unlock(&nf_ct_frag6_lock);
- return;
- }
- tmp = nf_ct_frag6_lru_list.next;
- BUG_ON(tmp == NULL);
- fq = list_entry(tmp, struct nf_ct_frag6_queue, lru_list);
- atomic_inc(&fq->refcnt);
- read_unlock(&nf_ct_frag6_lock);
-
- spin_lock(&fq->lock);
- if (!(fq->last_in&COMPLETE))
- fq_kill(fq);
- spin_unlock(&fq->lock);
-
- fq_put(fq, &work);
- }
+ local_bh_disable();
+ inet_frag_evictor(&nf_init_frags, &nf_frags);
+ local_bh_enable();
}
static void nf_ct_frag6_expire(unsigned long data)
{
- struct nf_ct_frag6_queue *fq = (struct nf_ct_frag6_queue *) data;
+ struct nf_ct_frag6_queue *fq;
+
+ fq = container_of((struct inet_frag_queue *)data,
+ struct nf_ct_frag6_queue, q);
- spin_lock(&fq->lock);
+ spin_lock(&fq->q.lock);
- if (fq->last_in & COMPLETE)
+ if (fq->q.last_in & INET_FRAG_COMPLETE)
goto out;
fq_kill(fq);
out:
- spin_unlock(&fq->lock);
- fq_put(fq, NULL);
+ spin_unlock(&fq->q.lock);
+ fq_put(fq);
}
/* Creation primitives. */
-static struct nf_ct_frag6_queue *nf_ct_frag6_intern(unsigned int hash,
- struct nf_ct_frag6_queue *fq_in)
+static __inline__ struct nf_ct_frag6_queue *
+fq_find(__be32 id, u32 user, struct in6_addr *src, struct in6_addr *dst)
{
- struct nf_ct_frag6_queue *fq;
-#ifdef CONFIG_SMP
- struct hlist_node *n;
-#endif
-
- write_lock(&nf_ct_frag6_lock);
-#ifdef CONFIG_SMP
- hlist_for_each_entry(fq, n, &nf_ct_frag6_hash[hash], list) {
- if (fq->id == fq_in->id &&
- ipv6_addr_equal(&fq_in->saddr, &fq->saddr) &&
- ipv6_addr_equal(&fq_in->daddr, &fq->daddr)) {
- atomic_inc(&fq->refcnt);
- write_unlock(&nf_ct_frag6_lock);
- fq_in->last_in |= COMPLETE;
- fq_put(fq_in, NULL);
- return fq;
- }
- }
-#endif
- fq = fq_in;
-
- if (!mod_timer(&fq->timer, jiffies + nf_ct_frag6_timeout))
- atomic_inc(&fq->refcnt);
-
- atomic_inc(&fq->refcnt);
- hlist_add_head(&fq->list, &nf_ct_frag6_hash[hash]);
- INIT_LIST_HEAD(&fq->lru_list);
- list_add_tail(&fq->lru_list, &nf_ct_frag6_lru_list);
- nf_ct_frag6_nqueues++;
- write_unlock(&nf_ct_frag6_lock);
- return fq;
-}
+ struct inet_frag_queue *q;
+ struct ip6_create_arg arg;
+ unsigned int hash;
+ arg.id = id;
+ arg.user = user;
+ arg.src = src;
+ arg.dst = dst;
-static struct nf_ct_frag6_queue *
-nf_ct_frag6_create(unsigned int hash, __be32 id, struct in6_addr *src, struct in6_addr *dst)
-{
- struct nf_ct_frag6_queue *fq;
+ read_lock_bh(&nf_frags.lock);
+ hash = inet6_hash_frag(id, src, dst, nf_frags.rnd);
- if ((fq = frag_alloc_queue()) == NULL) {
- DEBUGP("Can't alloc new queue\n");
+ q = inet_frag_find(&nf_init_frags, &nf_frags, &arg, hash);
+ local_bh_enable();
+ if (q == NULL)
goto oom;
- }
-
- memset(fq, 0, sizeof(struct nf_ct_frag6_queue));
- fq->id = id;
- ipv6_addr_copy(&fq->saddr, src);
- ipv6_addr_copy(&fq->daddr, dst);
-
- init_timer(&fq->timer);
- fq->timer.function = nf_ct_frag6_expire;
- fq->timer.data = (long) fq;
- spin_lock_init(&fq->lock);
- atomic_set(&fq->refcnt, 1);
-
- return nf_ct_frag6_intern(hash, fq);
+ return container_of(q, struct nf_ct_frag6_queue, q);
oom:
+ pr_debug("Can't alloc new queue\n");
return NULL;
}
-static __inline__ struct nf_ct_frag6_queue *
-fq_find(__be32 id, struct in6_addr *src, struct in6_addr *dst)
-{
- struct nf_ct_frag6_queue *fq;
- struct hlist_node *n;
- unsigned int hash = ip6qhashfn(id, src, dst);
-
- read_lock(&nf_ct_frag6_lock);
- hlist_for_each_entry(fq, n, &nf_ct_frag6_hash[hash], list) {
- if (fq->id == id &&
- ipv6_addr_equal(src, &fq->saddr) &&
- ipv6_addr_equal(dst, &fq->daddr)) {
- atomic_inc(&fq->refcnt);
- read_unlock(&nf_ct_frag6_lock);
- return fq;
- }
- }
- read_unlock(&nf_ct_frag6_lock);
-
- return nf_ct_frag6_create(hash, id, src, dst);
-}
-
-static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb,
- struct frag_hdr *fhdr, int nhoff)
+static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb,
+ const struct frag_hdr *fhdr, int nhoff)
{
struct sk_buff *prev, *next;
int offset, end;
- if (fq->last_in & COMPLETE) {
- DEBUGP("Allready completed\n");
+ if (fq->q.last_in & INET_FRAG_COMPLETE) {
+ pr_debug("Allready completed\n");
goto err;
}
offset = ntohs(fhdr->frag_off) & ~0x7;
- end = offset + (ntohs(skb->nh.ipv6h->payload_len) -
- ((u8 *) (fhdr + 1) - (u8 *) (skb->nh.ipv6h + 1)));
+ end = offset + (ntohs(ipv6_hdr(skb)->payload_len) -
+ ((u8 *)(fhdr + 1) - (u8 *)(ipv6_hdr(skb) + 1)));
if ((unsigned int)end > IPV6_MAXPLEN) {
- DEBUGP("offset is too large.\n");
- return -1;
+ pr_debug("offset is too large.\n");
+ return -1;
}
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->csum = csum_sub(skb->csum,
- csum_partial(skb->nh.raw,
- (u8*)(fhdr + 1) - skb->nh.raw,
+ if (skb->ip_summed == CHECKSUM_COMPLETE) {
+ const unsigned char *nh = skb_network_header(skb);
+ skb->csum = csum_sub(skb->csum,
+ csum_partial(nh, (u8 *)(fhdr + 1) - nh,
0));
+ }
/* Is this the final fragment? */
if (!(fhdr->frag_off & htons(IP6_MF))) {
/* If we already have some bits beyond end
* or have different end, the segment is corrupted.
*/
- if (end < fq->len ||
- ((fq->last_in & LAST_IN) && end != fq->len)) {
- DEBUGP("already received last fragment\n");
+ if (end < fq->q.len ||
+ ((fq->q.last_in & INET_FRAG_LAST_IN) && end != fq->q.len)) {
+ pr_debug("already received last fragment\n");
goto err;
}
- fq->last_in |= LAST_IN;
- fq->len = end;
+ fq->q.last_in |= INET_FRAG_LAST_IN;
+ fq->q.len = end;
} else {
/* Check if the fragment is rounded to 8 bytes.
* Required by the RFC.
/* RFC2460 says always send parameter problem in
* this case. -DaveM
*/
- DEBUGP("the end of this fragment is not rounded to 8 bytes.\n");
+ pr_debug("end of fragment not rounded to 8 bytes.\n");
return -1;
}
- if (end > fq->len) {
+ if (end > fq->q.len) {
/* Some bits beyond end -> corruption. */
- if (fq->last_in & LAST_IN) {
- DEBUGP("last packet already reached.\n");
+ if (fq->q.last_in & INET_FRAG_LAST_IN) {
+ pr_debug("last packet already reached.\n");
goto err;
}
- fq->len = end;
+ fq->q.len = end;
}
}
/* Point into the IP datagram 'data' part. */
if (!pskb_pull(skb, (u8 *) (fhdr + 1) - skb->data)) {
- DEBUGP("queue: message is too short.\n");
+ pr_debug("queue: message is too short.\n");
goto err;
}
if (pskb_trim_rcsum(skb, end - offset)) {
- DEBUGP("Can't trim\n");
+ pr_debug("Can't trim\n");
goto err;
}
* this fragment, right?
*/
prev = NULL;
- for (next = fq->fragments; next != NULL; next = next->next) {
+ for (next = fq->q.fragments; next != NULL; next = next->next) {
if (NFCT_FRAG6_CB(next)->offset >= offset)
break; /* bingo! */
prev = next;
if (i > 0) {
offset += i;
if (end <= offset) {
- DEBUGP("overlap\n");
+ pr_debug("overlap\n");
goto err;
}
if (!pskb_pull(skb, i)) {
- DEBUGP("Can't pull\n");
+ pr_debug("Can't pull\n");
goto err;
}
if (skb->ip_summed != CHECKSUM_UNNECESSARY)
/* Eat head of the next overlapped fragment
* and leave the loop. The next ones cannot overlap.
*/
- DEBUGP("Eat head of the overlapped parts.: %d", i);
+ pr_debug("Eat head of the overlapped parts.: %d", i);
if (!pskb_pull(next, i))
goto err;
/* next fragment */
NFCT_FRAG6_CB(next)->offset += i;
- fq->meat -= i;
+ fq->q.meat -= i;
if (next->ip_summed != CHECKSUM_UNNECESSARY)
next->ip_summed = CHECKSUM_NONE;
break;
if (prev)
prev->next = next;
else
- fq->fragments = next;
+ fq->q.fragments = next;
- fq->meat -= free_it->len;
+ fq->q.meat -= free_it->len;
frag_kfree_skb(free_it, NULL);
}
}
if (prev)
prev->next = skb;
else
- fq->fragments = skb;
+ fq->q.fragments = skb;
skb->dev = NULL;
- skb_get_timestamp(skb, &fq->stamp);
- fq->meat += skb->len;
- atomic_add(skb->truesize, &nf_ct_frag6_mem);
+ fq->q.stamp = skb->tstamp;
+ fq->q.meat += skb->len;
+ atomic_add(skb->truesize, &nf_init_frags.mem);
/* The first fragment.
* nhoffset is obtained from the first fragment, of course.
*/
if (offset == 0) {
fq->nhoffset = nhoff;
- fq->last_in |= FIRST_IN;
+ fq->q.last_in |= INET_FRAG_FIRST_IN;
}
- write_lock(&nf_ct_frag6_lock);
- list_move_tail(&fq->lru_list, &nf_ct_frag6_lru_list);
- write_unlock(&nf_ct_frag6_lock);
+ write_lock(&nf_frags.lock);
+ list_move_tail(&fq->q.lru_list, &nf_init_frags.lru_list);
+ write_unlock(&nf_frags.lock);
return 0;
err:
static struct sk_buff *
nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
{
- struct sk_buff *fp, *op, *head = fq->fragments;
+ struct sk_buff *fp, *op, *head = fq->q.fragments;
int payload_len;
fq_kill(fq);
- BUG_TRAP(head != NULL);
- BUG_TRAP(NFCT_FRAG6_CB(head)->offset == 0);
+ WARN_ON(head == NULL);
+ WARN_ON(NFCT_FRAG6_CB(head)->offset != 0);
/* Unfragmented part is taken from the first segment. */
- payload_len = (head->data - head->nh.raw) - sizeof(struct ipv6hdr) + fq->len - sizeof(struct frag_hdr);
+ payload_len = ((head->data - skb_network_header(head)) -
+ sizeof(struct ipv6hdr) + fq->q.len -
+ sizeof(struct frag_hdr));
if (payload_len > IPV6_MAXPLEN) {
- DEBUGP("payload len is too large.\n");
+ pr_debug("payload len is too large.\n");
goto out_oversize;
}
/* Head of list must not be cloned. */
if (skb_cloned(head) && pskb_expand_head(head, 0, 0, GFP_ATOMIC)) {
- DEBUGP("skb is cloned but can't expand head");
+ pr_debug("skb is cloned but can't expand head");
goto out_oom;
}
/* If the first fragment is fragmented itself, we split
* it to two chunks: the first with data and paged part
* and the second, holding only fragments. */
- if (skb_shinfo(head)->frag_list) {
+ if (skb_has_frags(head)) {
struct sk_buff *clone;
int i, plen = 0;
if ((clone = alloc_skb(0, GFP_ATOMIC)) == NULL) {
- DEBUGP("Can't alloc skb\n");
+ pr_debug("Can't alloc skb\n");
goto out_oom;
}
clone->next = head->next;
head->next = clone;
skb_shinfo(clone)->frag_list = skb_shinfo(head)->frag_list;
- skb_shinfo(head)->frag_list = NULL;
+ skb_frag_list_init(head);
for (i=0; i<skb_shinfo(head)->nr_frags; i++)
plen += skb_shinfo(head)->frags[i].size;
clone->len = clone->data_len = head->data_len - plen;
clone->ip_summed = head->ip_summed;
NFCT_FRAG6_CB(clone)->orig = NULL;
- atomic_add(clone->truesize, &nf_ct_frag6_mem);
+ atomic_add(clone->truesize, &nf_init_frags.mem);
}
/* We have to remove fragment header from datagram and to relocate
* header in order to calculate ICV correctly. */
- head->nh.raw[fq->nhoffset] = head->h.raw[0];
- memmove(head->head + sizeof(struct frag_hdr), head->head,
+ skb_network_header(head)[fq->nhoffset] = skb_transport_header(head)[0];
+ memmove(head->head + sizeof(struct frag_hdr), head->head,
(head->data - head->head) - sizeof(struct frag_hdr));
- head->mac.raw += sizeof(struct frag_hdr);
- head->nh.raw += sizeof(struct frag_hdr);
+ head->mac_header += sizeof(struct frag_hdr);
+ head->network_header += sizeof(struct frag_hdr);
skb_shinfo(head)->frag_list = head->next;
- head->h.raw = head->data;
- skb_push(head, head->data - head->nh.raw);
- atomic_sub(head->truesize, &nf_ct_frag6_mem);
+ skb_reset_transport_header(head);
+ skb_push(head, head->data - skb_network_header(head));
+ atomic_sub(head->truesize, &nf_init_frags.mem);
for (fp=head->next; fp; fp = fp->next) {
head->data_len += fp->len;
else if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_add(head->csum, fp->csum);
head->truesize += fp->truesize;
- atomic_sub(fp->truesize, &nf_ct_frag6_mem);
+ atomic_sub(fp->truesize, &nf_init_frags.mem);
}
head->next = NULL;
head->dev = dev;
- skb_set_timestamp(head, &fq->stamp);
- head->nh.ipv6h->payload_len = htons(payload_len);
+ head->tstamp = fq->q.stamp;
+ ipv6_hdr(head)->payload_len = htons(payload_len);
/* Yes, and fold redundant checksum back. 8) */
if (head->ip_summed == CHECKSUM_COMPLETE)
- head->csum = csum_partial(head->nh.raw, head->h.raw-head->nh.raw, head->csum);
+ head->csum = csum_partial(skb_network_header(head),
+ skb_network_header_len(head),
+ head->csum);
- fq->fragments = NULL;
+ fq->q.fragments = NULL;
/* all original skbs are linked into the NFCT_FRAG6_CB(head).orig */
fp = skb_shinfo(head)->frag_list;
static int
find_prev_fhdr(struct sk_buff *skb, u8 *prevhdrp, int *prevhoff, int *fhoff)
{
- u8 nexthdr = skb->nh.ipv6h->nexthdr;
- u8 prev_nhoff = (u8 *)&skb->nh.ipv6h->nexthdr - skb->data;
- int start = (u8 *)(skb->nh.ipv6h+1) - skb->data;
+ u8 nexthdr = ipv6_hdr(skb)->nexthdr;
+ const int netoff = skb_network_offset(skb);
+ u8 prev_nhoff = netoff + offsetof(struct ipv6hdr, nexthdr);
+ int start = netoff + sizeof(struct ipv6hdr);
int len = skb->len - start;
u8 prevhdr = NEXTHDR_IPV6;
- while (nexthdr != NEXTHDR_FRAGMENT) {
- struct ipv6_opt_hdr hdr;
- int hdrlen;
+ while (nexthdr != NEXTHDR_FRAGMENT) {
+ struct ipv6_opt_hdr hdr;
+ int hdrlen;
if (!ipv6_ext_hdr(nexthdr)) {
return -1;
}
- if (len < (int)sizeof(struct ipv6_opt_hdr)) {
- DEBUGP("too short\n");
+ if (nexthdr == NEXTHDR_NONE) {
+ pr_debug("next header is none\n");
return -1;
}
- if (nexthdr == NEXTHDR_NONE) {
- DEBUGP("next header is none\n");
+ if (len < (int)sizeof(struct ipv6_opt_hdr)) {
+ pr_debug("too short\n");
return -1;
}
- if (skb_copy_bits(skb, start, &hdr, sizeof(hdr)))
- BUG();
- if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hdr.hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(&hdr);
+ if (skb_copy_bits(skb, start, &hdr, sizeof(hdr)))
+ BUG();
+ if (nexthdr == NEXTHDR_AUTH)
+ hdrlen = (hdr.hdrlen+2)<<2;
+ else
+ hdrlen = ipv6_optlen(&hdr);
prevhdr = nexthdr;
prev_nhoff = start;
- nexthdr = hdr.nexthdr;
- len -= hdrlen;
- start += hdrlen;
- }
+ nexthdr = hdr.nexthdr;
+ len -= hdrlen;
+ start += hdrlen;
+ }
if (len < 0)
return -1;
return 0;
}
-struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb)
+struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb, u32 user)
{
- struct sk_buff *clone;
+ struct sk_buff *clone;
struct net_device *dev = skb->dev;
struct frag_hdr *fhdr;
struct nf_ct_frag6_queue *fq;
struct sk_buff *ret_skb = NULL;
/* Jumbo payload inhibits frag. header */
- if (skb->nh.ipv6h->payload_len == 0) {
- DEBUGP("payload len = 0\n");
+ if (ipv6_hdr(skb)->payload_len == 0) {
+ pr_debug("payload len = 0\n");
return skb;
}
clone = skb_clone(skb, GFP_ATOMIC);
if (clone == NULL) {
- DEBUGP("Can't clone skb\n");
+ pr_debug("Can't clone skb\n");
return skb;
}
NFCT_FRAG6_CB(clone)->orig = skb;
if (!pskb_may_pull(clone, fhoff + sizeof(*fhdr))) {
- DEBUGP("message is too short.\n");
+ pr_debug("message is too short.\n");
goto ret_orig;
}
- clone->h.raw = clone->data + fhoff;
- hdr = clone->nh.ipv6h;
- fhdr = (struct frag_hdr *)clone->h.raw;
+ skb_set_transport_header(clone, fhoff);
+ hdr = ipv6_hdr(clone);
+ fhdr = (struct frag_hdr *)skb_transport_header(clone);
if (!(fhdr->frag_off & htons(0xFFF9))) {
- DEBUGP("Invalid fragment offset\n");
+ pr_debug("Invalid fragment offset\n");
/* It is not a fragmented frame */
goto ret_orig;
}
- if (atomic_read(&nf_ct_frag6_mem) > nf_ct_frag6_high_thresh)
+ if (atomic_read(&nf_init_frags.mem) > nf_init_frags.high_thresh)
nf_ct_frag6_evictor();
- fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr);
+ fq = fq_find(fhdr->identification, user, &hdr->saddr, &hdr->daddr);
if (fq == NULL) {
- DEBUGP("Can't find and can't create new queue\n");
+ pr_debug("Can't find and can't create new queue\n");
goto ret_orig;
}
- spin_lock(&fq->lock);
+ spin_lock_bh(&fq->q.lock);
if (nf_ct_frag6_queue(fq, clone, fhdr, nhoff) < 0) {
- spin_unlock(&fq->lock);
- DEBUGP("Can't insert skb to queue\n");
- fq_put(fq, NULL);
+ spin_unlock_bh(&fq->q.lock);
+ pr_debug("Can't insert skb to queue\n");
+ fq_put(fq);
goto ret_orig;
}
- if (fq->last_in == (FIRST_IN|LAST_IN) && fq->meat == fq->len) {
+ if (fq->q.last_in == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
+ fq->q.meat == fq->q.len) {
ret_skb = nf_ct_frag6_reasm(fq, dev);
if (ret_skb == NULL)
- DEBUGP("Can't reassemble fragmented packets\n");
+ pr_debug("Can't reassemble fragmented packets\n");
}
- spin_unlock(&fq->lock);
+ spin_unlock_bh(&fq->q.lock);
- fq_put(fq, NULL);
+ fq_put(fq);
return ret_skb;
ret_orig:
nf_conntrack_put_reasm(skb);
}
-int nf_ct_frag6_kfree_frags(struct sk_buff *skb)
-{
- struct sk_buff *s, *s2;
-
- for (s = NFCT_FRAG6_CB(skb)->orig; s; s = s2) {
-
- s2 = s->next;
- kfree_skb(s);
- }
-
- kfree_skb(skb);
-
- return 0;
-}
-
int nf_ct_frag6_init(void)
{
- nf_ct_frag6_hash_rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
- (jiffies ^ (jiffies >> 6)));
-
- init_timer(&nf_ct_frag6_secret_timer);
- nf_ct_frag6_secret_timer.function = nf_ct_frag6_secret_rebuild;
- nf_ct_frag6_secret_timer.expires = jiffies
- + nf_ct_frag6_secret_interval;
- add_timer(&nf_ct_frag6_secret_timer);
+ nf_frags.hashfn = nf_hashfn;
+ nf_frags.constructor = ip6_frag_init;
+ nf_frags.destructor = NULL;
+ nf_frags.skb_free = nf_skb_free;
+ nf_frags.qsize = sizeof(struct nf_ct_frag6_queue);
+ nf_frags.match = ip6_frag_match;
+ nf_frags.frag_expire = nf_ct_frag6_expire;
+ nf_frags.secret_interval = 10 * 60 * HZ;
+ nf_init_frags.timeout = IPV6_FRAG_TIMEOUT;
+ nf_init_frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
+ nf_init_frags.low_thresh = IPV6_FRAG_LOW_THRESH;
+ inet_frags_init_net(&nf_init_frags);
+ inet_frags_init(&nf_frags);
return 0;
}
void nf_ct_frag6_cleanup(void)
{
- del_timer(&nf_ct_frag6_secret_timer);
- nf_ct_frag6_low_thresh = 0;
+ inet_frags_fini(&nf_frags);
+
+ nf_init_frags.low_thresh = 0;
nf_ct_frag6_evictor();
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff