| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef _NF_CONNTRACK_SYNPROXY_H |
| 3 | #define _NF_CONNTRACK_SYNPROXY_H |
| 4 | |
| 5 | #include <net/netfilter/nf_conntrack_seqadj.h> |
| 6 | #include <net/netns/generic.h> |
| 7 | |
| 8 | struct nf_conn_synproxy { |
| 9 | u32 isn; |
| 10 | u32 its; |
| 11 | u32 tsoff; |
| 12 | }; |
| 13 | |
| 14 | static inline struct nf_conn_synproxy *nfct_synproxy(const struct nf_conn *ct) |
| 15 | { |
| 16 | #if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY) |
| 17 | return nf_ct_ext_find(ct, id: NF_CT_EXT_SYNPROXY); |
| 18 | #else |
| 19 | return NULL; |
| 20 | #endif |
| 21 | } |
| 22 | |
| 23 | static inline struct nf_conn_synproxy *nfct_synproxy_ext_add(struct nf_conn *ct) |
| 24 | { |
| 25 | #if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY) |
| 26 | return nf_ct_ext_add(ct, id: NF_CT_EXT_SYNPROXY, GFP_ATOMIC); |
| 27 | #else |
| 28 | return NULL; |
| 29 | #endif |
| 30 | } |
| 31 | |
| 32 | static inline bool nf_ct_add_synproxy(struct nf_conn *ct, |
| 33 | const struct nf_conn *tmpl) |
| 34 | { |
| 35 | #if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY) |
| 36 | if (tmpl && nfct_synproxy(ct: tmpl)) { |
| 37 | if (!nfct_seqadj_ext_add(ct)) |
| 38 | return false; |
| 39 | |
| 40 | if (!nfct_synproxy_ext_add(ct)) |
| 41 | return false; |
| 42 | } |
| 43 | #endif |
| 44 | |
| 45 | return true; |
| 46 | } |
| 47 | |
| 48 | #endif /* _NF_CONNTRACK_SYNPROXY_H */ |
| 49 |