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authorJiri Olsa <jolsa@redhat.com>2011-01-18 18:12:24 +0100
committerPatrick McHardy <kaber@trash.net>2011-01-18 18:12:24 +0100
commit93557f53e1fbd9e2b6574ab0a9b5852628fde9e3 (patch)
treeb6bc24a10d4a48c354935d8e4fe4d110cf6dc060 /include/net
parentnetfilter: ipt_CLUSTERIP: remove "no conntrack!" (diff)
downloadlinux-dev-93557f53e1fbd9e2b6574ab0a9b5852628fde9e3.tar.xz
linux-dev-93557f53e1fbd9e2b6574ab0a9b5852628fde9e3.zip
netfilter: nf_conntrack: nf_conntrack snmp helper
Adding support for SNMP broadcast connection tracking. The SNMP broadcast requests are now paired with the SNMP responses. Thus allowing using SNMP broadcasts with firewall enabled. Please refer to the following conversation: http://marc.info/?l=netfilter-devel&m=125992205006600&w=2 Patrick McHardy wrote: > > The best solution would be to add generic broadcast tracking, the > > use of expectations for this is a bit of abuse. > > The second best choice I guess would be to move the help() function > > to a shared module and generalize it so it can be used for both. This patch implements the "second best choice". Since the netbios-ns conntrack module uses the same helper functionality as the snmp, only one helper function is added for both snmp and netbios-ns modules into the new object - nf_conntrack_broadcast. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/netfilter/nf_conntrack_helper.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h
index 32c305dbdab6..f1c1311adc2c 100644
--- a/include/net/netfilter/nf_conntrack_helper.h
+++ b/include/net/netfilter/nf_conntrack_helper.h
@@ -63,4 +63,10 @@ static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct)
extern int nf_conntrack_helper_init(void);
extern void nf_conntrack_helper_fini(void);
+extern int nf_conntrack_broadcast_help(struct sk_buff *skb,
+ unsigned int protoff,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int timeout);
+
#endif /*_NF_CONNTRACK_HELPER_H*/