diff options
| author | Flavio Leitner <fbl@redhat.com> | 2019-04-17 11:46:15 -0300 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-04-30 14:19:55 +0200 |
| commit | 08010a21602678932894c5e87014a282af0079cf (patch) | |
| tree | 432127f82237d8c8c789b170a4a2e676b124fa35 /include/net | |
| parent | e1f172e162c0a11721f1188f12e5b4c3f9f80de6 (diff) | |
netfilter: add API to manage NAT helpers.
The API allows a conntrack helper to indicate its corresponding
NAT helper which then can be loaded and reference counted.
Signed-off-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netfilter/nf_conntrack_helper.h | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h index 28bd4569aa64..44b5a00a9c64 100644 --- a/include/net/netfilter/nf_conntrack_helper.h +++ b/include/net/netfilter/nf_conntrack_helper.h @@ -15,7 +15,8 @@ #include <net/netfilter/nf_conntrack_extend.h> #include <net/netfilter/nf_conntrack_expect.h> -#define NF_NAT_HELPER_NAME(name) "ip_nat_" name +#define NF_NAT_HELPER_PREFIX "ip_nat_" +#define NF_NAT_HELPER_NAME(name) NF_NAT_HELPER_PREFIX name #define MODULE_ALIAS_NF_NAT_HELPER(name) \ MODULE_ALIAS(NF_NAT_HELPER_NAME(name)) @@ -58,6 +59,8 @@ struct nf_conntrack_helper { unsigned int queue_num; /* length of userspace private data stored in nf_conn_help->data */ u16 data_len; + /* name of NAT helper module */ + char nat_mod_name[NF_CT_HELPER_NAME_LEN]; }; /* Must be kept in sync with the classes defined by helpers */ @@ -157,4 +160,21 @@ nf_ct_helper_expectfn_find_by_symbol(const void *symbol); extern struct hlist_head *nf_ct_helper_hash; extern unsigned int nf_ct_helper_hsize; +struct nf_conntrack_nat_helper { + struct list_head list; + char mod_name[NF_CT_HELPER_NAME_LEN]; /* module name */ + struct module *module; /* pointer to self */ +}; + +#define NF_CT_NAT_HELPER_INIT(name) \ + { \ + .mod_name = NF_NAT_HELPER_NAME(name), \ + .module = THIS_MODULE \ + } + +void nf_nat_helper_register(struct nf_conntrack_nat_helper *nat); +void nf_nat_helper_unregister(struct nf_conntrack_nat_helper *nat); +int nf_nat_helper_try_module_get(const char *name, u16 l3num, + u8 protonum); +void nf_nat_helper_put(struct nf_conntrack_helper *helper); #endif /*_NF_CONNTRACK_HELPER_H*/ |