diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-03-30 16:58:37 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-03-31 22:34:11 +0200 |
| commit | 19c28b1374fb1073a9ec873a6c10bf5f16b10b9d (patch) | |
| tree | bed9f47eadc1cc774d1619f4fa8715ad8a644457 /include | |
| parent | 802b805162a1b7d8391c40ac8a878e9e63287aff (diff) | |
netfilter: add helper function to set up the nfnetlink header and use it
This patch adds a helper function to set up the netlink and nfnetlink headers.
Update existing codebase to use it.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netfilter/nfnetlink.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/netfilter/nfnetlink.h b/include/linux/netfilter/nfnetlink.h index f6267e2883f2..791d516e1e88 100644 --- a/include/linux/netfilter/nfnetlink.h +++ b/include/linux/netfilter/nfnetlink.h @@ -57,6 +57,33 @@ static inline u16 nfnl_msg_type(u8 subsys, u8 msg_type) return subsys << 8 | msg_type; } +static inline void nfnl_fill_hdr(struct nlmsghdr *nlh, u8 family, u8 version, + __be16 res_id) +{ + struct nfgenmsg *nfmsg; + + nfmsg = nlmsg_data(nlh); + nfmsg->nfgen_family = family; + nfmsg->version = version; + nfmsg->res_id = res_id; +} + +static inline struct nlmsghdr *nfnl_msg_put(struct sk_buff *skb, u32 portid, + u32 seq, int type, int flags, + u8 family, u8 version, + __be16 res_id) +{ + struct nlmsghdr *nlh; + + nlh = nlmsg_put(skb, portid, seq, type, sizeof(struct nfgenmsg), flags); + if (!nlh) + return NULL; + + nfnl_fill_hdr(nlh, family, version, res_id); + + return nlh; +} + void nfnl_lock(__u8 subsys_id); void nfnl_unlock(__u8 subsys_id); #ifdef CONFIG_PROVE_LOCKING |