diff --git a/include/net/netfilter/nft_redir.h b/include/net/netfilter/nft_redir.h deleted file mode 100644 index 4a970737c03c..000000000000 --- a/include/net/netfilter/nft_redir.h +++ /dev/null @@ -1,22 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _NFT_REDIR_H_ -#define _NFT_REDIR_H_ - -struct nft_redir { - enum nft_registers sreg_proto_min:8; - enum nft_registers sreg_proto_max:8; - u16 flags; -}; - -extern const struct nla_policy nft_redir_policy[]; - -int nft_redir_init(const struct nft_ctx *ctx, - const struct nft_expr *expr, - const struct nlattr * const tb[]); - -int nft_redir_dump(struct sk_buff *skb, const struct nft_expr *expr); - -int nft_redir_validate(const struct nft_ctx *ctx, const struct nft_expr *expr, - const struct nft_data **data); - -#endif /* _NFT_REDIR_H_ */ diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig index 8688461ed077..12cc3f7d7733 100644 --- a/net/ipv4/netfilter/Kconfig +++ b/net/ipv4/netfilter/Kconfig @@ -115,14 +115,6 @@ config NFT_MASQ_IPV4 This is the expression that provides IPv4 masquerading support for nf_tables. -config NFT_REDIR_IPV4 - tristate "IPv4 redirect support for nf_tables" - depends on NF_TABLES_IPV4 - depends on NFT_REDIR - select NF_NAT_REDIRECT - help - This is the expression that provides IPv4 redirect support for - nf_tables. endif # NF_TABLES config NF_NAT_SNMP_BASIC diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile index b2cdf705fdf1..5558caf92578 100644 --- a/net/ipv4/netfilter/Makefile +++ b/net/ipv4/netfilter/Makefile @@ -29,7 +29,6 @@ obj-$(CONFIG_NFT_CHAIN_NAT_IPV4) += nft_chain_nat_ipv4.o obj-$(CONFIG_NFT_REJECT_IPV4) += nft_reject_ipv4.o obj-$(CONFIG_NFT_FIB_IPV4) += nft_fib_ipv4.o obj-$(CONFIG_NFT_MASQ_IPV4) += nft_masq_ipv4.o -obj-$(CONFIG_NFT_REDIR_IPV4) += nft_redir_ipv4.o obj-$(CONFIG_NFT_DUP_IPV4) += nft_dup_ipv4.o # flow table support diff --git a/net/ipv4/netfilter/nft_redir_ipv4.c b/net/ipv4/netfilter/nft_redir_ipv4.c deleted file mode 100644 index 5120be1d3118..000000000000 --- a/net/ipv4/netfilter/nft_redir_ipv4.c +++ /dev/null @@ -1,82 +0,0 @@ -/* - * Copyright (c) 2014 Arturo Borrero Gonzalez - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -static void nft_redir_ipv4_eval(const struct nft_expr *expr, - struct nft_regs *regs, - const struct nft_pktinfo *pkt) -{ - struct nft_redir *priv = nft_expr_priv(expr); - struct nf_nat_ipv4_multi_range_compat mr; - - memset(&mr, 0, sizeof(mr)); - if (priv->sreg_proto_min) { - mr.range[0].min.all = (__force __be16)nft_reg_load16( - ®s->data[priv->sreg_proto_min]); - mr.range[0].max.all = (__force __be16)nft_reg_load16( - ®s->data[priv->sreg_proto_max]); - mr.range[0].flags |= NF_NAT_RANGE_PROTO_SPECIFIED; - } - - mr.range[0].flags |= priv->flags; - - regs->verdict.code = nf_nat_redirect_ipv4(pkt->skb, &mr, nft_hook(pkt)); -} - -static void -nft_redir_ipv4_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) -{ - nf_ct_netns_put(ctx->net, NFPROTO_IPV4); -} - -static struct nft_expr_type nft_redir_ipv4_type; -static const struct nft_expr_ops nft_redir_ipv4_ops = { - .type = &nft_redir_ipv4_type, - .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)), - .eval = nft_redir_ipv4_eval, - .init = nft_redir_init, - .destroy = nft_redir_ipv4_destroy, - .dump = nft_redir_dump, - .validate = nft_redir_validate, -}; - -static struct nft_expr_type nft_redir_ipv4_type __read_mostly = { - .family = NFPROTO_IPV4, - .name = "redir", - .ops = &nft_redir_ipv4_ops, - .policy = nft_redir_policy, - .maxattr = NFTA_REDIR_MAX, - .owner = THIS_MODULE, -}; - -static int __init nft_redir_ipv4_module_init(void) -{ - return nft_register_expr(&nft_redir_ipv4_type); -} - -static void __exit nft_redir_ipv4_module_exit(void) -{ - nft_unregister_expr(&nft_redir_ipv4_type); -} - -module_init(nft_redir_ipv4_module_init); -module_exit(nft_redir_ipv4_module_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Arturo Borrero Gonzalez "); -MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "redir"); diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig index a04a38166d8c..7e7cc411003a 100644 --- a/net/ipv6/netfilter/Kconfig +++ b/net/ipv6/netfilter/Kconfig @@ -49,14 +49,6 @@ config NFT_MASQ_IPV6 This is the expression that provides IPv4 masquerading support for nf_tables. -config NFT_REDIR_IPV6 - tristate "IPv6 redirect support for nf_tables" - depends on NFT_REDIR - select NF_NAT_REDIRECT - help - This is the expression that provides IPv4 redirect support for - nf_tables. - endif # NF_NAT config NFT_REJECT_IPV6 diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile index afb880427133..42a80d03245a 100644 --- a/net/ipv6/netfilter/Makefile +++ b/net/ipv6/netfilter/Makefile @@ -31,7 +31,6 @@ obj-$(CONFIG_NFT_CHAIN_ROUTE_IPV6) += nft_chain_route_ipv6.o obj-$(CONFIG_NFT_CHAIN_NAT_IPV6) += nft_chain_nat_ipv6.o obj-$(CONFIG_NFT_REJECT_IPV6) += nft_reject_ipv6.o obj-$(CONFIG_NFT_MASQ_IPV6) += nft_masq_ipv6.o -obj-$(CONFIG_NFT_REDIR_IPV6) += nft_redir_ipv6.o obj-$(CONFIG_NFT_DUP_IPV6) += nft_dup_ipv6.o obj-$(CONFIG_NFT_FIB_IPV6) += nft_fib_ipv6.o diff --git a/net/ipv6/netfilter/nft_redir_ipv6.c b/net/ipv6/netfilter/nft_redir_ipv6.c deleted file mode 100644 index 74269865acc8..000000000000 --- a/net/ipv6/netfilter/nft_redir_ipv6.c +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Copyright (c) 2014 Arturo Borrero Gonzalez - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -static void nft_redir_ipv6_eval(const struct nft_expr *expr, - struct nft_regs *regs, - const struct nft_pktinfo *pkt) -{ - struct nft_redir *priv = nft_expr_priv(expr); - struct nf_nat_range2 range; - - memset(&range, 0, sizeof(range)); - if (priv->sreg_proto_min) { - range.min_proto.all = (__force __be16)nft_reg_load16( - ®s->data[priv->sreg_proto_min]); - range.max_proto.all = (__force __be16)nft_reg_load16( - ®s->data[priv->sreg_proto_max]); - range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; - } - - range.flags |= priv->flags; - - regs->verdict.code = - nf_nat_redirect_ipv6(pkt->skb, &range, nft_hook(pkt)); -} - -static void -nft_redir_ipv6_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) -{ - nf_ct_netns_put(ctx->net, NFPROTO_IPV6); -} - -static struct nft_expr_type nft_redir_ipv6_type; -static const struct nft_expr_ops nft_redir_ipv6_ops = { - .type = &nft_redir_ipv6_type, - .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)), - .eval = nft_redir_ipv6_eval, - .init = nft_redir_init, - .destroy = nft_redir_ipv6_destroy, - .dump = nft_redir_dump, - .validate = nft_redir_validate, -}; - -static struct nft_expr_type nft_redir_ipv6_type __read_mostly = { - .family = NFPROTO_IPV6, - .name = "redir", - .ops = &nft_redir_ipv6_ops, - .policy = nft_redir_policy, - .maxattr = NFTA_REDIR_MAX, - .owner = THIS_MODULE, -}; - -static int __init nft_redir_ipv6_module_init(void) -{ - return nft_register_expr(&nft_redir_ipv6_type); -} - -static void __exit nft_redir_ipv6_module_exit(void) -{ - nft_unregister_expr(&nft_redir_ipv6_type); -} - -module_init(nft_redir_ipv6_module_init); -module_exit(nft_redir_ipv6_module_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Arturo Borrero Gonzalez "); -MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "redir"); diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig index 5beb51d39dc2..73857f9fdb25 100644 --- a/net/netfilter/Kconfig +++ b/net/netfilter/Kconfig @@ -541,6 +541,7 @@ config NFT_REDIR depends on NF_CONNTRACK depends on NF_NAT tristate "Netfilter nf_tables redirect support" + select NF_NAT_REDIRECT help This options adds the "redirect" expression that you can use to perform NAT in the redirect flavour. diff --git a/net/netfilter/nft_redir.c b/net/netfilter/nft_redir.c index c64cbe78dee7..f8092926f704 100644 --- a/net/netfilter/nft_redir.c +++ b/net/netfilter/nft_redir.c @@ -13,19 +13,24 @@ #include #include #include +#include #include -#include -const struct nla_policy nft_redir_policy[NFTA_REDIR_MAX + 1] = { +struct nft_redir { + enum nft_registers sreg_proto_min:8; + enum nft_registers sreg_proto_max:8; + u16 flags; +}; + +static const struct nla_policy nft_redir_policy[NFTA_REDIR_MAX + 1] = { [NFTA_REDIR_REG_PROTO_MIN] = { .type = NLA_U32 }, [NFTA_REDIR_REG_PROTO_MAX] = { .type = NLA_U32 }, [NFTA_REDIR_FLAGS] = { .type = NLA_U32 }, }; -EXPORT_SYMBOL_GPL(nft_redir_policy); -int nft_redir_validate(const struct nft_ctx *ctx, - const struct nft_expr *expr, - const struct nft_data **data) +static int nft_redir_validate(const struct nft_ctx *ctx, + const struct nft_expr *expr, + const struct nft_data **data) { int err; @@ -37,11 +42,10 @@ int nft_redir_validate(const struct nft_ctx *ctx, (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT)); } -EXPORT_SYMBOL_GPL(nft_redir_validate); -int nft_redir_init(const struct nft_ctx *ctx, - const struct nft_expr *expr, - const struct nlattr * const tb[]) +static int nft_redir_init(const struct nft_ctx *ctx, + const struct nft_expr *expr, + const struct nlattr * const tb[]) { struct nft_redir *priv = nft_expr_priv(expr); unsigned int plen; @@ -77,7 +81,6 @@ int nft_redir_init(const struct nft_ctx *ctx, return nf_ct_netns_get(ctx->net, ctx->family); } -EXPORT_SYMBOL_GPL(nft_redir_init); int nft_redir_dump(struct sk_buff *skb, const struct nft_expr *expr) { @@ -101,7 +104,134 @@ int nft_redir_dump(struct sk_buff *skb, const struct nft_expr *expr) nla_put_failure: return -1; } -EXPORT_SYMBOL_GPL(nft_redir_dump); + +static void nft_redir_ipv4_eval(const struct nft_expr *expr, + struct nft_regs *regs, + const struct nft_pktinfo *pkt) +{ + struct nft_redir *priv = nft_expr_priv(expr); + struct nf_nat_ipv4_multi_range_compat mr; + + memset(&mr, 0, sizeof(mr)); + if (priv->sreg_proto_min) { + mr.range[0].min.all = (__force __be16)nft_reg_load16( + ®s->data[priv->sreg_proto_min]); + mr.range[0].max.all = (__force __be16)nft_reg_load16( + ®s->data[priv->sreg_proto_max]); + mr.range[0].flags |= NF_NAT_RANGE_PROTO_SPECIFIED; + } + + mr.range[0].flags |= priv->flags; + + regs->verdict.code = nf_nat_redirect_ipv4(pkt->skb, &mr, nft_hook(pkt)); +} + +static void +nft_redir_ipv4_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) +{ + nf_ct_netns_put(ctx->net, NFPROTO_IPV4); +} + +static struct nft_expr_type nft_redir_ipv4_type; +static const struct nft_expr_ops nft_redir_ipv4_ops = { + .type = &nft_redir_ipv4_type, + .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)), + .eval = nft_redir_ipv4_eval, + .init = nft_redir_init, + .destroy = nft_redir_ipv4_destroy, + .dump = nft_redir_dump, + .validate = nft_redir_validate, +}; + +static struct nft_expr_type nft_redir_ipv4_type __read_mostly = { + .family = NFPROTO_IPV4, + .name = "redir", + .ops = &nft_redir_ipv4_ops, + .policy = nft_redir_policy, + .maxattr = NFTA_REDIR_MAX, + .owner = THIS_MODULE, +}; + +#ifdef CONFIG_NF_TABLES_IPV6 +static void nft_redir_ipv6_eval(const struct nft_expr *expr, + struct nft_regs *regs, + const struct nft_pktinfo *pkt) +{ + struct nft_redir *priv = nft_expr_priv(expr); + struct nf_nat_range2 range; + + memset(&range, 0, sizeof(range)); + if (priv->sreg_proto_min) { + range.min_proto.all = (__force __be16)nft_reg_load16( + ®s->data[priv->sreg_proto_min]); + range.max_proto.all = (__force __be16)nft_reg_load16( + ®s->data[priv->sreg_proto_max]); + range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; + } + + range.flags |= priv->flags; + + regs->verdict.code = + nf_nat_redirect_ipv6(pkt->skb, &range, nft_hook(pkt)); +} + +static void +nft_redir_ipv6_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) +{ + nf_ct_netns_put(ctx->net, NFPROTO_IPV6); +} + +static struct nft_expr_type nft_redir_ipv6_type; +static const struct nft_expr_ops nft_redir_ipv6_ops = { + .type = &nft_redir_ipv6_type, + .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)), + .eval = nft_redir_ipv6_eval, + .init = nft_redir_init, + .destroy = nft_redir_ipv6_destroy, + .dump = nft_redir_dump, + .validate = nft_redir_validate, +}; + +static struct nft_expr_type nft_redir_ipv6_type __read_mostly = { + .family = NFPROTO_IPV6, + .name = "redir", + .ops = &nft_redir_ipv6_ops, + .policy = nft_redir_policy, + .maxattr = NFTA_REDIR_MAX, + .owner = THIS_MODULE, +}; +#endif + +static int __init nft_redir_module_init(void) +{ + int ret = nft_register_expr(&nft_redir_ipv4_type); + + if (ret) + return ret; + +#ifdef CONFIG_NF_TABLES_IPV6 + ret = nft_register_expr(&nft_redir_ipv6_type); + if (ret) { + nft_unregister_expr(&nft_redir_ipv4_type); + return ret; + } +#endif + + return ret; +} + +static void __exit nft_redir_module_exit(void) +{ + nft_unregister_expr(&nft_redir_ipv4_type); +#ifdef CONFIG_NF_TABLES_IPV6 + nft_unregister_expr(&nft_redir_ipv6_type); +#endif +} + +module_init(nft_redir_module_init); +module_exit(nft_redir_module_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Arturo Borrero Gonzalez "); +MODULE_ALIAS_NFT_AF_EXPR(AF_INET4, "redir"); +MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "redir");