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[NETFILTER] ctnetlink: add one nesting level for TCP state

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To keep consistency, the TCP private protocol information is nested
attributes under CTA_PROTOINFO_TCP. This way the sequence of attributes to
access the TCP state information looks like here below:

CTA_PROTOINFO
CTA_PROTOINFO_TCP
CTA_PROTOINFO_TCP_STATE

instead of:

CTA_PROTOINFO
CTA_PROTOINFO_TCP_STATE

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2005-10-10 20:55:49 -07:00 committed by David S. Miller
parent 5bbc243aaf
commit e1c73b78e3
2 changed files with 12 additions and 1 deletions
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9
include/linux/netfilter/nfnetlink_conntrack.h
View File

@ -70,11 +70,18 @@ enum ctattr_l4proto {
enum ctattr_protoinfo {
CTA_PROTOINFO_UNSPEC,
CTA_PROTOINFO_TCP_STATE,
CTA_PROTOINFO_TCP,
__CTA_PROTOINFO_MAX
};
#define CTA_PROTOINFO_MAX (__CTA_PROTOINFO_MAX - 1)
enum ctattr_protoinfo_tcp {
CTA_PROTOINFO_TCP_UNSPEC,
CTA_PROTOINFO_TCP_STATE,
__CTA_PROTOINFO_TCP_MAX
};
#define CTA_PROTOINFO_TCP_MAX (__CTA_PROTOINFO_TCP_MAX - 1)
enum ctattr_counters {
CTA_COUNTERS_UNSPEC,
CTA_COUNTERS_PACKETS,

4
net/ipv4/netfilter/ip_conntrack_proto_tcp.c
View File

@ -341,11 +341,15 @@ static int tcp_print_conntrack(struct seq_file *s,
static int tcp_to_nfattr(struct sk_buff *skb, struct nfattr *nfa,
const struct ip_conntrack *ct)
{
struct nfattr *nest_parms = NFA_NEST(skb, CTA_PROTOINFO_TCP);
read_lock_bh(&tcp_lock);
NFA_PUT(skb, CTA_PROTOINFO_TCP_STATE, sizeof(u_int8_t),
&ct->proto.tcp.state);
read_unlock_bh(&tcp_lock);
NFA_NEST_END(skb, nest_parms);
return 0;
nfattr_failure: