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#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/ctype.h>
#include <linux/inet.h>
#include <linux/mm.h>
#include <linux/net.h>
#include <net/checksum.h>
#include <net/ip.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/percpu.h>
#include <linux/init.h>
#include <linux/ratelimit.h>
#include <net/sock.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
void rpl_inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb,
const __be32 *from, const __be32 *to,
int pseudohdr)
{
__be32 diff[] = {
~from[0], ~from[1], ~from[2], ~from[3],
to[0], to[1], to[2], to[3],
};
if (skb->ip_summed != CHECKSUM_PARTIAL) {
*sum = csum_fold(csum_partial(diff, sizeof(diff),
~csum_unfold(*sum)));
if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
skb->csum = ~csum_partial(diff, sizeof(diff),
~skb->csum);
} else if (pseudohdr)
*sum = ~csum_fold(csum_partial(diff, sizeof(diff),
csum_unfold(*sum)));
}
EXPORT_SYMBOL_GPL(rpl_inet_proto_csum_replace16);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0)
bool rpl___net_get_random_once(void *buf, int nbytes, bool *done,
atomic_t *done_key)
{
static DEFINE_SPINLOCK(lock);
unsigned long flags;
spin_lock_irqsave(&lock, flags);
if (*done) {
spin_unlock_irqrestore(&lock, flags);
return false;
}
get_random_bytes(buf, nbytes);
*done = true;
spin_unlock_irqrestore(&lock, flags);
atomic_set(done_key, 1);
return true;
}
EXPORT_SYMBOL_GPL(rpl___net_get_random_once);
#endif
#ifdef NEED_ALLOC_PERCPU_GFP
void __percpu *__alloc_percpu_gfp(size_t size, size_t align, gfp_t gfp)
{
void __percpu *p;
int i;
/* older kernel do not allow all GFP flags, specifically atomic
* allocation.
*/
if (gfp & ~(GFP_KERNEL | __GFP_ZERO))
return NULL;
p = __alloc_percpu(size, align);
if (!p)
return p;
if (!(gfp & __GFP_ZERO))
return p;
for_each_possible_cpu(i) {
void *d;
d = per_cpu_ptr(p, i);
memset(d, 0, size);
}
return p;
}
#endif
#ifndef HAVE_NLA_PUT_64BIT
int rpl_nla_put_64bit(struct sk_buff *skb, int attrtype, int attrlen,
const void *data, int padattr)
{
size_t len;
if (nla_need_padding_for_64bit(skb))
len = nla_total_size_64bit(attrlen);
else
len = nla_total_size(attrlen);
if (unlikely(skb_tailroom(skb) < len))
return -EMSGSIZE;
__nla_put_64bit(skb, attrtype, attrlen, data, padattr);
return 0;
}
EXPORT_SYMBOL_GPL(rpl_nla_put_64bit);
void rpl___nla_put_64bit(struct sk_buff *skb, int attrtype, int attrlen,
const void *data, int padattr)
{
struct nlattr *nla;
nla = __nla_reserve_64bit(skb, attrtype, attrlen, padattr);
memcpy(nla_data(nla), data, attrlen);
}
EXPORT_SYMBOL_GPL(rpl___nla_put_64bit);
struct nlattr *rpl___nla_reserve_64bit(struct sk_buff *skb, int attrtype,
int attrlen, int padattr)
{
if (nla_need_padding_for_64bit(skb))
nla_align_64bit(skb, padattr);
return __nla_reserve(skb, attrtype, attrlen);
}
EXPORT_SYMBOL_GPL(rpl___nla_reserve_64bit);
#endif
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