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src: move to a pskb-based API

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It occurred that skb reallocation does happen on older kernels, and
those kernels should really be supported, since the patch is really
minimal.
This commit is contained in:
Jan Engelhardt
2008-08-11 22:07:41 -04:00
parent 213acdffda
commit ab27472eb4
11 changed files with 75 additions and 82 deletions
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11
extensions/xt_TARPIT.c
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@@ -49,7 +49,7 @@
#include <net/tcp.h>
#include "compat_xtables.h"
static inline void tarpit_tcp(struct sk_buff *oldskb, unsigned int hook)
static void tarpit_tcp(struct sk_buff *oldskb, unsigned int hook)
{
struct tcphdr _otcph, *oth, *tcph;
unsigned int addr_type;
@@ -157,8 +157,10 @@ static inline void tarpit_tcp(struct sk_buff *oldskb, unsigned int hook)
#endif
addr_type = RTN_LOCAL;
if (ip_route_me_harder(nskb, addr_type))
if (ip_route_me_harder(&nskb, addr_type))
goto free_nskb;
else
niph = ip_hdr(nskb);
nskb->ip_summed = CHECKSUM_NONE;
@@ -184,10 +186,11 @@ static inline void tarpit_tcp(struct sk_buff *oldskb, unsigned int hook)
}
static unsigned int
tarpit_tg(struct sk_buff *skb, const struct net_device *in,
tarpit_tg(struct sk_buff **pskb, const struct net_device *in,
const struct net_device *out, unsigned int hooknum,
const struct xt_target *target, const void *targinfo)
{
const struct sk_buff *skb = *pskb;
const struct iphdr *iph = ip_hdr(skb);
const struct rtable *rt = (const void *)skb->dst;
@@ -215,7 +218,7 @@ tarpit_tg(struct sk_buff *skb, const struct net_device *in,
if (iph->frag_off & htons(IP_OFFSET))
return NF_DROP;
tarpit_tcp(skb, hooknum);
tarpit_tcp(*pskb, hooknum);
return NF_DROP;
}