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[NETFILTER]: nf_conntrack: add nf_copy() to safely copy members in skb 

This unifies the codes to copy netfilter related datas. Before copying,
nf_copy() puts original members in destination skb.

Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yasuyuki Kozakai 2007-03-14 16:44:01 -07:00 committed by David S. Miller
parent edda553c32
commit e7ac05f340
3 changed files with 15 additions and 29 deletions
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13
include/linux/skbuff.h
View File

@ -1514,9 +1514,22 @@ static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src)
#endif
}
static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src)
{
nf_conntrack_put(dst->nfct);
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
nf_conntrack_put_reasm(dst->nfct_reasm);
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
nf_bridge_put(dst->nf_bridge);
#endif
__nf_copy(dst, src);
}
#else /* CONFIG_NETFILTER */
static inline void nf_reset(struct sk_buff *skb) {}
static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src) {}
static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src) {}
#endif /* CONFIG_NETFILTER */
#ifdef CONFIG_NETWORK_SECMARK

13
net/ipv4/ip_output.c
View File

@ -384,20 +384,9 @@ static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
#ifdef CONFIG_NET_SCHED
to->tc_index = from->tc_index;
#endif
#ifdef CONFIG_NETFILTER
/* Connection association is same as pre-frag packet */
nf_conntrack_put(to->nfct);
to->nfct = from->nfct;
nf_conntrack_get(to->nfct);
to->nfctinfo = from->nfctinfo;
nf_copy(to, from);
#if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
to->ipvs_property = from->ipvs_property;
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
nf_bridge_put(to->nf_bridge);
to->nf_bridge = from->nf_bridge;
nf_bridge_get(to->nf_bridge);
#endif
#endif
skb_copy_secmark(to, from);
}

18
net/ipv6/ip6_output.c
View File

@ -504,23 +504,7 @@ static void ip6_copy_metadata(struct sk_buff *to, struct sk_buff *from)
#ifdef CONFIG_NET_SCHED
to->tc_index = from->tc_index;
#endif
#ifdef CONFIG_NETFILTER
/* Connection association is same as pre-frag packet */
nf_conntrack_put(to->nfct);
to->nfct = from->nfct;
nf_conntrack_get(to->nfct);
to->nfctinfo = from->nfctinfo;
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
nf_conntrack_put_reasm(to->nfct_reasm);
to->nfct_reasm = from->nfct_reasm;
nf_conntrack_get_reasm(to->nfct_reasm);
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
nf_bridge_put(to->nf_bridge);
to->nf_bridge = from->nf_bridge;
nf_bridge_get(to->nf_bridge);
#endif
#endif
nf_copy(to, from);
skb_copy_secmark(to, from);
}