diff options
author | Florian Westphal <fw@strlen.de> | 2019-03-27 09:22:27 +0100 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-04-08 23:02:58 +0200 |
commit | 071657d2c38c54bf047cf2280fc96e4a3e8a91f2 (patch) | |
tree | 41bcb25f935267aae40b2ae7cb49b653bd8d9a8e | |
parent | 4806e975729f99c7908d1688a143f1e16d464e6c (diff) | |
download | linux-071657d2c38c54bf047cf2280fc96e4a3e8a91f2.tar.bz2 |
netfilter: nft_masq: add inet support
This allows use of a single masquerade rule in nat inet family
to handle both ipv4 and ipv6.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
-rw-r--r-- | net/netfilter/nft_masq.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/net/netfilter/nft_masq.c b/net/netfilter/nft_masq.c index bee156eaa400..35a1794acf4c 100644 --- a/net/netfilter/nft_masq.c +++ b/net/netfilter/nft_masq.c @@ -218,6 +218,61 @@ static inline int nft_masq_module_init_ipv6(void) { return 0; } static inline void nft_masq_module_exit_ipv6(void) {} #endif +#ifdef CONFIG_NF_TABLES_INET +static void nft_masq_inet_eval(const struct nft_expr *expr, + struct nft_regs *regs, + const struct nft_pktinfo *pkt) +{ + switch (nft_pf(pkt)) { + case NFPROTO_IPV4: + return nft_masq_ipv4_eval(expr, regs, pkt); + case NFPROTO_IPV6: + return nft_masq_ipv6_eval(expr, regs, pkt); + } + + WARN_ON_ONCE(1); +} + +static void +nft_masq_inet_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) +{ + nf_ct_netns_put(ctx->net, NFPROTO_INET); +} + +static struct nft_expr_type nft_masq_inet_type; +static const struct nft_expr_ops nft_masq_inet_ops = { + .type = &nft_masq_inet_type, + .size = NFT_EXPR_SIZE(sizeof(struct nft_masq)), + .eval = nft_masq_inet_eval, + .init = nft_masq_init, + .destroy = nft_masq_inet_destroy, + .dump = nft_masq_dump, + .validate = nft_masq_validate, +}; + +static struct nft_expr_type nft_masq_inet_type __read_mostly = { + .family = NFPROTO_INET, + .name = "masq", + .ops = &nft_masq_inet_ops, + .policy = nft_masq_policy, + .maxattr = NFTA_MASQ_MAX, + .owner = THIS_MODULE, +}; + +static int __init nft_masq_module_init_inet(void) +{ + return nft_register_expr(&nft_masq_inet_type); +} + +static void nft_masq_module_exit_inet(void) +{ + nft_unregister_expr(&nft_masq_inet_type); +} +#else +static inline int nft_masq_module_init_inet(void) { return 0; } +static inline void nft_masq_module_exit_inet(void) {} +#endif + static int __init nft_masq_module_init(void) { int ret; @@ -226,8 +281,15 @@ static int __init nft_masq_module_init(void) if (ret < 0) return ret; + ret = nft_masq_module_init_inet(); + if (ret < 0) { + nft_masq_module_exit_ipv6(); + return ret; + } + ret = nft_register_expr(&nft_masq_ipv4_type); if (ret < 0) { + nft_masq_module_exit_inet(); nft_masq_module_exit_ipv6(); return ret; } @@ -235,6 +297,7 @@ static int __init nft_masq_module_init(void) ret = nf_nat_masquerade_ipv4_register_notifier(); if (ret < 0) { nft_masq_module_exit_ipv6(); + nft_masq_module_exit_inet(); nft_unregister_expr(&nft_masq_ipv4_type); return ret; } @@ -245,6 +308,7 @@ static int __init nft_masq_module_init(void) static void __exit nft_masq_module_exit(void) { nft_masq_module_exit_ipv6(); + nft_masq_module_exit_inet(); nft_unregister_expr(&nft_masq_ipv4_type); nf_nat_masquerade_ipv4_unregister_notifier(); } |