diff options
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/Kconfig | 59 | ||||
| -rw-r--r-- | net/netfilter/Makefile | 3 | ||||
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 104 | ||||
| -rw-r--r-- | net/netfilter/nf_tables_core.c | 5 | ||||
| -rw-r--r-- | net/netfilter/nft_meta.c | 146 | ||||
| -rw-r--r-- | net/netfilter/nft_meta_target.c | 117 | ||||
| -rw-r--r-- | net/netfilter/nft_queue.c | 134 | ||||
| -rw-r--r-- | net/netfilter/nft_reject.c | 144 | ||||
| -rw-r--r-- | net/netfilter/xt_NFQUEUE.c | 80 |
9 files changed, 565 insertions, 227 deletions
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig index c17902cb5df9..c3b3b26c4c4e 100644 --- a/net/netfilter/Kconfig +++ b/net/netfilter/Kconfig @@ -414,47 +414,104 @@ config NETFILTER_SYNPROXY endif # NF_CONNTRACK config NF_TABLES - depends on NETFILTER_NETLINK + select NETFILTER_NETLINK tristate "Netfilter nf_tables support" + help + nftables is the new packet classification framework that intends to + replace the existing {ip,ip6,arp,eb}_tables infrastructure. It + provides a pseudo-state machine with an extensible instruction-set + (also known as expressions) that the userspace 'nft' utility + (http://www.netfilter.org/projects/nftables) uses to build the + rule-set. It also comes with the generic set infrastructure that + allows you to construct mappings between matchings and actions + for performance lookups. + + To compile it as a module, choose M here. config NFT_EXTHDR depends on NF_TABLES tristate "Netfilter nf_tables IPv6 exthdr module" + help + This option adds the "exthdr" expression that you can use to match + IPv6 extension headers. config NFT_META depends on NF_TABLES tristate "Netfilter nf_tables meta module" + help + This option adds the "meta" expression that you can use to match and + to set packet metainformation such as the packet mark. config NFT_CT depends on NF_TABLES depends on NF_CONNTRACK tristate "Netfilter nf_tables conntrack module" + help + This option adds the "meta" expression that you can use to match + connection tracking information such as the flow state. config NFT_RBTREE depends on NF_TABLES tristate "Netfilter nf_tables rbtree set module" + help + This option adds the "rbtree" set type (Red Black tree) that is used + to build interval-based sets. config NFT_HASH depends on NF_TABLES tristate "Netfilter nf_tables hash set module" + help + This option adds the "hash" set type that is used to build one-way + mappings between matchings and actions. config NFT_COUNTER depends on NF_TABLES tristate "Netfilter nf_tables counter module" + help + This option adds the "counter" expression that you can use to + include packet and byte counters in a rule. config NFT_LOG depends on NF_TABLES tristate "Netfilter nf_tables log module" + help + This option adds the "log" expression that you can use to log + packets matching some criteria. config NFT_LIMIT depends on NF_TABLES tristate "Netfilter nf_tables limit module" + help + This option adds the "limit" expression that you can use to + ratelimit rule matchings. config NFT_NAT depends on NF_TABLES depends on NF_CONNTRACK depends on NF_NAT tristate "Netfilter nf_tables nat module" + help + This option adds the "nat" expression that you can use to perform + typical Network Address Translation (NAT) packet transformations. + +config NFT_QUEUE + depends on NF_TABLES + depends on NETFILTER_XTABLES + depends on NETFILTER_NETLINK_QUEUE + tristate "Netfilter nf_tables queue module" + help + This is required if you intend to use the userspace queueing + infrastructure (also known as NFQUEUE) from nftables. + +config NFT_REJECT + depends on NF_TABLES + depends on NF_TABLES_IPV6 || !NF_TABLES_IPV6 + default m if NETFILTER_ADVANCED=n + tristate "Netfilter nf_tables reject support" + help + This option adds the "reject" expression that you can use to + explicitly deny and notify via TCP reset/ICMP informational errors + unallowed traffic. config NFT_COMPAT depends on NF_TABLES diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile index 407fc232f625..78b4e1c9c595 100644 --- a/net/netfilter/Makefile +++ b/net/netfilter/Makefile @@ -76,7 +76,8 @@ obj-$(CONFIG_NFT_META) += nft_meta.o obj-$(CONFIG_NFT_CT) += nft_ct.o obj-$(CONFIG_NFT_LIMIT) += nft_limit.o obj-$(CONFIG_NFT_NAT) += nft_nat.o -#nf_tables-objs += nft_meta_target.o +obj-$(CONFIG_NFT_QUEUE) += nft_queue.o +obj-$(CONFIG_NFT_REJECT) += nft_reject.o obj-$(CONFIG_NFT_RBTREE) += nft_rbtree.o obj-$(CONFIG_NFT_HASH) += nft_hash.o obj-$(CONFIG_NFT_COUNTER) += nft_counter.o diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index f93b7d06f4be..629b6da98318 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -180,7 +180,8 @@ static int nf_tables_fill_table_info(struct sk_buff *skb, u32 portid, u32 seq, nfmsg->res_id = 0; if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) || - nla_put_be32(skb, NFTA_TABLE_FLAGS, htonl(table->flags))) + nla_put_be32(skb, NFTA_TABLE_FLAGS, htonl(table->flags)) || + nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use))) goto nla_put_failure; return nlmsg_end(skb, nlh); @@ -1923,12 +1924,14 @@ static int nft_ctx_init_from_setattr(struct nft_ctx *ctx, { struct net *net = sock_net(skb->sk); const struct nfgenmsg *nfmsg = nlmsg_data(nlh); - const struct nft_af_info *afi; + const struct nft_af_info *afi = NULL; const struct nft_table *table = NULL; - afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false); - if (IS_ERR(afi)) - return PTR_ERR(afi); + if (nfmsg->nfgen_family != NFPROTO_UNSPEC) { + afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false); + if (IS_ERR(afi)) + return PTR_ERR(afi); + } if (nla[NFTA_SET_TABLE] != NULL) { table = nf_tables_table_lookup(afi, nla[NFTA_SET_TABLE]); @@ -1973,11 +1976,14 @@ static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set, return -ENOMEM; list_for_each_entry(i, &ctx->table->sets, list) { - if (!sscanf(i->name, name, &n)) + int tmp; + + if (!sscanf(i->name, name, &tmp)) continue; - if (n < 0 || n > BITS_PER_LONG * PAGE_SIZE) + if (tmp < 0 || tmp > BITS_PER_LONG * PAGE_SIZE) continue; - set_bit(n, inuse); + + set_bit(tmp, inuse); } n = find_first_zero_bit(inuse, BITS_PER_LONG * PAGE_SIZE); @@ -2094,8 +2100,8 @@ done: return skb->len; } -static int nf_tables_dump_sets_all(struct nft_ctx *ctx, struct sk_buff *skb, - struct netlink_callback *cb) +static int nf_tables_dump_sets_family(struct nft_ctx *ctx, struct sk_buff *skb, + struct netlink_callback *cb) { const struct nft_set *set; unsigned int idx = 0, s_idx = cb->args[0]; @@ -2127,6 +2133,61 @@ done: return skb->len; } +static int nf_tables_dump_sets_all(struct nft_ctx *ctx, struct sk_buff *skb, + struct netlink_callback *cb) +{ + const struct nft_set *set; + unsigned int idx, s_idx = cb->args[0]; + const struct nft_af_info *afi; + struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2]; + struct net *net = sock_net(skb->sk); + int cur_family = cb->args[3]; + + if (cb->args[1]) + return skb->len; + + list_for_each_entry(afi, &net->nft.af_info, list) { + if (cur_family) { + if (afi->family != cur_family) + continue; + + cur_family = 0; + } + + list_for_each_entry(table, &afi->tables, list) { + if (cur_table) { + if (cur_table != table) + continue; + + cur_table = NULL; + } + + ctx->table = table; + ctx->afi = afi; + idx = 0; + list_for_each_entry(set, &ctx->table->sets, list) { + if (idx < s_idx) + goto cont; + if (nf_tables_fill_set(skb, ctx, set, + NFT_MSG_NEWSET, + NLM_F_MULTI) < 0) { + cb->args[0] = idx; + cb->args[2] = (unsigned long) table; + cb->args[3] = afi->family; + goto done; + } +cont: + idx++; + } + if (s_idx) + s_idx = 0; + } + } + cb->args[1] = 1; +done: + return skb->len; +} + static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb) { const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); @@ -2143,9 +2204,12 @@ static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb) if (err < 0) return err; - if (ctx.table == NULL) - ret = nf_tables_dump_sets_all(&ctx, skb, cb); - else + if (ctx.table == NULL) { + if (ctx.afi == NULL) + ret = nf_tables_dump_sets_all(&ctx, skb, cb); + else + ret = nf_tables_dump_sets_family(&ctx, skb, cb); + } else ret = nf_tables_dump_sets_table(&ctx, skb, cb); return ret; @@ -2158,6 +2222,7 @@ static int nf_tables_getset(struct sock *nlsk, struct sk_buff *skb, const struct nft_set *set; struct nft_ctx ctx; struct sk_buff *skb2; + const struct nfgenmsg *nfmsg = nlmsg_data(nlh); int err; /* Verify existance before starting dump */ @@ -2172,6 +2237,10 @@ static int nf_tables_getset(struct sock *nlsk, struct sk_buff *skb, return netlink_dump_start(nlsk, skb, nlh, &c); } + /* Only accept unspec with dump */ + if (nfmsg->nfgen_family == NFPROTO_UNSPEC) + return -EAFNOSUPPORT; + set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME]); if (IS_ERR(set)) return PTR_ERR(set); @@ -2341,6 +2410,7 @@ static int nf_tables_delset(struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { + const struct nfgenmsg *nfmsg = nlmsg_data(nlh); struct nft_set *set; struct nft_ctx ctx; int err; @@ -2352,6 +2422,9 @@ static int nf_tables_delset(struct sock *nlsk, struct sk_buff *skb, if (err < 0) return err; + if (nfmsg->nfgen_family == NFPROTO_UNSPEC) + return -EAFNOSUPPORT; + set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME]); if (IS_ERR(set)) return PTR_ERR(set); @@ -2521,9 +2594,8 @@ static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb) u32 portid, seq; int event, err; - nfmsg = nlmsg_data(cb->nlh); - err = nlmsg_parse(cb->nlh, sizeof(*nfmsg), nla, NFTA_SET_ELEM_LIST_MAX, - nft_set_elem_list_policy); + err = nlmsg_parse(cb->nlh, sizeof(struct nfgenmsg), nla, + NFTA_SET_ELEM_LIST_MAX, nft_set_elem_list_policy); if (err < 0) return err; diff --git a/net/netfilter/nf_tables_core.c b/net/netfilter/nf_tables_core.c index cb9e685caae1..e8fcc343c2b9 100644 --- a/net/netfilter/nf_tables_core.c +++ b/net/netfilter/nf_tables_core.c @@ -164,7 +164,7 @@ next_rule: break; } - switch (data[NFT_REG_VERDICT].verdict) { + switch (data[NFT_REG_VERDICT].verdict & NF_VERDICT_MASK) { case NF_ACCEPT: case NF_DROP: case NF_QUEUE: @@ -172,6 +172,9 @@ next_rule: nft_trace_packet(pkt, chain, rulenum, NFT_TRACE_RULE); return data[NFT_REG_VERDICT].verdict; + } + + switch (data[NFT_REG_VERDICT].verdict) { case NFT_JUMP: if (unlikely(pkt->skb->nf_trace)) nft_trace_packet(pkt, chain, rulenum, NFT_TRACE_RULE); diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c index 8c28220a90b3..1ceaaa6dfe72 100644 --- a/net/netfilter/nft_meta.c +++ b/net/netfilter/nft_meta.c @@ -21,12 +21,15 @@ struct nft_meta { enum nft_meta_keys key:8; - enum nft_registers dreg:8; + union { + enum nft_registers dreg:8; + enum nft_registers sreg:8; + }; }; -static void nft_meta_eval(const struct nft_expr *expr, - struct nft_data data[NFT_REG_MAX + 1], - const struct nft_pktinfo *pkt) +static void nft_meta_get_eval(const struct nft_expr *expr, + struct nft_data data[NFT_REG_MAX + 1], + const struct nft_pktinfo *pkt) { const struct nft_meta *priv = nft_expr_priv(expr); const struct sk_buff *skb = pkt->skb; @@ -132,23 +135,50 @@ err: data[NFT_REG_VERDICT].verdict = NFT_BREAK; } +static void nft_meta_set_eval(const struct nft_expr *expr, + struct nft_data data[NFT_REG_MAX + 1], + const struct nft_pktinfo *pkt) +{ + const struct nft_meta *meta = nft_expr_priv(expr); + struct sk_buff *skb = pkt->skb; + u32 value = data[meta->sreg].data[0]; + + switch (meta->key) { + case NFT_META_MARK: + skb->mark = value; + break; + case NFT_META_PRIORITY: + skb->priority = value; + break; + case NFT_META_NFTRACE: + skb->nf_trace = 1; + break; + default: + WARN_ON(1); + } +} + static const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = { [NFTA_META_DREG] = { .type = NLA_U32 }, [NFTA_META_KEY] = { .type = NLA_U32 }, + [NFTA_META_SREG] = { .type = NLA_U32 }, }; -static int nft_meta_init(const struct nft_ctx *ctx, const struct nft_expr *expr, - const struct nlattr * const tb[]) +static int nft_meta_init_validate_set(uint32_t key) { - struct nft_meta *priv = nft_expr_priv(expr); - int err; - - if (tb[NFTA_META_DREG] == NULL || - tb[NFTA_META_KEY] == NULL) - return -EINVAL; + switch (key) { + case NFT_META_MARK: + case NFT_META_PRIORITY: + case NFT_META_NFTRACE: + return 0; + default: + return -EOPNOTSUPP; + } +} - priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); - switch (priv->key) { +static int nft_meta_init_validate_get(uint32_t key) +{ + switch (key) { case NFT_META_LEN: case NFT_META_PROTOCOL: case NFT_META_PRIORITY: @@ -167,26 +197,69 @@ static int nft_meta_init(const struct nft_ctx *ctx, const struct nft_expr *expr, #ifdef CONFIG_NETWORK_SECMARK case NFT_META_SECMARK: #endif - break; + return 0; default: return -EOPNOTSUPP; } - priv->dreg = ntohl(nla_get_be32(tb[NFTA_META_DREG])); - err = nft_validate_output_register(priv->dreg); +} + +static int nft_meta_init(const struct nft_ctx *ctx, const struct nft_expr *expr, + const struct nlattr * const tb[]) +{ + struct nft_meta *priv = nft_expr_priv(expr); + int err; + + priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); + + if (tb[NFTA_META_DREG]) { + err = nft_meta_init_validate_get(priv->key); + if (err < 0) + return err; + + priv->dreg = ntohl(nla_get_be32(tb[NFTA_META_DREG])); + err = nft_validate_output_register(priv->dreg); + if (err < 0) + return err; + + return nft_validate_data_load(ctx, priv->dreg, NULL, + NFT_DATA_VALUE); + } + + err = nft_meta_init_validate_set(priv->key); if (err < 0) return err; - return nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE); + + priv->sreg = ntohl(nla_get_be32(tb[NFTA_META_SREG])); + + return 0; } -static int nft_meta_dump(struct sk_buff *skb, const struct nft_expr *expr) +static int nft_meta_get_dump(struct sk_buff *skb, + const struct nft_expr *expr) { const struct nft_meta *priv = nft_expr_priv(expr); + if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key))) + goto nla_put_failure; if (nla_put_be32(skb, NFTA_META_DREG, htonl(priv->dreg))) goto nla_put_failure; + return 0; + +nla_put_failure: + return -1; +} + +static int nft_meta_set_dump(struct sk_buff *skb, + const struct nft_expr *expr) +{ + const struct nft_meta *priv = nft_expr_priv(expr); + if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key))) goto nla_put_failure; + if (nla_put_be32(skb, NFTA_META_SREG, htonl(priv->sreg))) + goto nla_put_failure; + return 0; nla_put_failure: @@ -194,17 +267,44 @@ nla_put_failure: } static struct nft_expr_type nft_meta_type; -static const struct nft_expr_ops nft_meta_ops = { +static const struct nft_expr_ops nft_meta_get_ops = { .type = &nft_meta_type, .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), - .eval = nft_meta_eval, + .eval = nft_meta_get_eval, .init = nft_meta_init, - .dump = nft_meta_dump, + .dump = nft_meta_get_dump, }; +static const struct nft_expr_ops nft_meta_set_ops = { + .type = &nft_meta_type, + .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), + .eval = nft_meta_set_eval, + .init = nft_meta_init, + .dump = nft_meta_set_dump, +}; + +static const struct nft_expr_ops * +nft_meta_select_ops(const struct nft_ctx *ctx, + const struct nlattr * const tb[]) +{ + if (tb[NFTA_META_KEY] == NULL) + return ERR_PTR(-EINVAL); + + if (tb[NFTA_META_DREG] && tb[NFTA_META_SREG]) + return ERR_PTR(-EINVAL); + + if (tb[NFTA_META_DREG]) + return &nft_meta_get_ops; + + if (tb[NFTA_META_SREG]) + return &nft_meta_set_ops; + + return ERR_PTR(-EINVAL); +} + static struct nft_expr_type nft_meta_type __read_mostly = { .name = "meta", - .ops = &nft_meta_ops, + .select_ops = &nft_meta_select_ops, .policy = nft_meta_policy, .maxattr = NFTA_META_MAX, .owner = THIS_MODULE, diff --git a/net/netfilter/nft_meta_target.c b/net/netfilter/nft_meta_target.c deleted file mode 100644 index 71177df75ffb..000000000000 --- a/net/netfilter/nft_meta_target.c +++ /dev/null @@ -1,117 +0,0 @@ -/* - * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> - * - * 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. - * - * Development of this code funded by Astaro AG (http://www.astaro.com/) - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/list.h> -#include <linux/rbtree.h> -#include <linux/netlink.h> -#include <linux/netfilter.h> -#include <linux/netfilter/nf_tables.h> -#include <net/netfilter/nf_tables.h> - -struct nft_meta { - enum nft_meta_keys key; -}; - -static void nft_meta_eval(const struct nft_expr *expr, - struct nft_data *nfres, - struct nft_data *data, - const struct nft_pktinfo *pkt) -{ - const struct nft_meta *meta = nft_expr_priv(expr); - struct sk_buff *skb = pkt->skb; - u32 val = data->data[0]; - - switch (meta->key) { - case NFT_META_MARK: - skb->mark = val; - break; - case NFT_META_PRIORITY: - skb->priority = val; - break; - case NFT_META_NFTRACE: - skb->nf_trace = val; - break; -#ifdef CONFIG_NETWORK_SECMARK - case NFT_META_SECMARK: - skb->secmark = val; - break; -#endif - default: - WARN_ON(1); - } -} - -static const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = { - [NFTA_META_KEY] = { .type = NLA_U32 }, -}; - -static int nft_meta_init(const struct nft_expr *expr, struct nlattr *tb[]) -{ - struct nft_meta *meta = nft_expr_priv(expr); - - if (tb[NFTA_META_KEY] == NULL) - return -EINVAL; - - meta->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); - switch (meta->key) { - case NFT_META_MARK: - case NFT_META_PRIORITY: - case NFT_META_NFTRACE: -#ifdef CONFIG_NETWORK_SECMARK - case NFT_META_SECMARK: -#endif - break; - default: - return -EINVAL; - } - - return 0; -} - -static int nft_meta_dump(struct sk_buff *skb, const struct nft_expr *expr) -{ - struct nft_meta *meta = nft_expr_priv(expr); - - NLA_PUT_BE32(skb, NFTA_META_KEY, htonl(meta->key)); - return 0; - -nla_put_failure: - return -1; -} - -static struct nft_expr_ops meta_target __read_mostly = { - .name = "meta", - .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), - .owner = THIS_MODULE, - .eval = nft_meta_eval, - .init = nft_meta_init, - .dump = nft_meta_dump, - .policy = nft_meta_policy, - .maxattr = NFTA_META_MAX, -}; - -static int __init nft_meta_target_init(void) -{ - return nft_register_expr(&meta_target); -} - -static void __exit nft_meta_target_exit(void) -{ - nft_unregister_expr(&meta_target); -} - -module_init(nft_meta_target_init); -module_exit(nft_meta_target_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); -MODULE_ALIAS_NFT_EXPR("meta"); diff --git a/net/netfilter/nft_queue.c b/net/netfilter/nft_queue.c new file mode 100644 index 000000000000..cbea473d69e9 --- /dev/null +++ b/net/netfilter/nft_queue.c @@ -0,0 +1,134 @@ +/* + * Copyright (c) 2013 Eric Leblond <eric@regit.org> + * + * 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. + * + * Development of this code partly funded by OISF + * (http://www.openinfosecfoundation.org/) + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/netlink.h> +#include <linux/jhash.h> +#include <linux/netfilter.h> +#include <linux/netfilter/nf_tables.h> +#include <net/netfilter/nf_tables.h> +#include <net/netfilter/nf_queue.h> + +static u32 jhash_initval __read_mostly; + +struct nft_queue { + u16 queuenum; + u16 queues_total; + u16 flags; + u8 family; +}; + +static void nft_queue_eval(const struct nft_expr *expr, + struct nft_data data[NFT_REG_MAX + 1], + const struct nft_pktinfo *pkt) +{ + struct nft_queue *priv = nft_expr_priv(expr); + u32 queue = priv->queuenum; + u32 ret; + + if (priv->queues_total > 1) { + if (priv->flags & NFT_QUEUE_FLAG_CPU_FANOUT) { + int cpu = smp_processor_id(); + + queue = priv->queuenum + cpu % priv->queues_total; + } else { + queue = nfqueue_hash(pkt->skb, queue, + priv->queues_total, priv->family, + jhash_initval); + } + } + + ret = NF_QUEUE_NR(queue); + if (priv->flags & NFT_QUEUE_FLAG_BYPASS) + ret |= NF_VERDICT_FLAG_QUEUE_BYPASS; + + data[NFT_REG_VERDICT].verdict = ret; +} + +static const struct nla_policy nft_queue_policy[NFTA_QUEUE_MAX + 1] = { + [NFTA_QUEUE_NUM] = { .type = NLA_U16 }, + [NFTA_QUEUE_TOTAL] = { .type = NLA_U16 }, + [NFTA_QUEUE_FLAGS] = { .type = NLA_U16 }, +}; + +static int nft_queue_init(const struct nft_ctx *ctx, + const struct nft_expr *expr, + const struct nlattr * const tb[]) +{ + struct nft_queue *priv = nft_expr_priv(expr); + + if (tb[NFTA_QUEUE_NUM] == NULL) + return -EINVAL; + + init_hashrandom(&jhash_initval); + priv->family = ctx->afi->family; + priv->queuenum = ntohs(nla_get_be16(tb[NFTA_QUEUE_NUM])); + + if (tb[NFTA_QUEUE_TOTAL] != NULL) + priv->queues_total = ntohs(nla_get_be16(tb[NFTA_QUEUE_TOTAL])); + if (tb[NFTA_QUEUE_FLAGS] != NULL) { + priv->flags = ntohs(nla_get_be16(tb[NFTA_QUEUE_FLAGS])); + if (priv->flags & ~NFT_QUEUE_FLAG_MASK) + return -EINVAL; + } + return 0; +} + +static int nft_queue_dump(struct sk_buff *skb, const struct nft_expr *expr) +{ + const struct nft_queue *priv = nft_expr_priv(expr); + + if (nla_put_be16(skb, NFTA_QUEUE_NUM, htons(priv->queuenum)) || + nla_put_be16(skb, NFTA_QUEUE_TOTAL, htons(priv->queues_total)) || + nla_put_be16(skb, NFTA_QUEUE_FLAGS, htons(priv->flags))) + goto nla_put_failure; + + return 0; + +nla_put_failure: + return -1; +} + +static struct nft_expr_type nft_queue_type; +static const struct nft_expr_ops nft_queue_ops = { + .type = &nft_queue_type, + .size = NFT_EXPR_SIZE(sizeof(struct nft_queue)), + .eval = nft_queue_eval, + .init = nft_queue_init, + .dump = nft_queue_dump, +}; + +static struct nft_expr_type nft_queue_type __read_mostly = { + .name = "queue", + .ops = &nft_queue_ops, + .policy = nft_queue_policy, + .maxattr = NFTA_QUEUE_MAX, + .owner = THIS_MODULE, +}; + +static int __init nft_queue_module_init(void) +{ + return nft_register_expr(&nft_queue_type); +} + +static void __exit nft_queue_module_exit(void) +{ + nft_unregister_expr(&nft_queue_type); +} + +module_init(nft_queue_module_init); +module_exit(nft_queue_module_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Eric Leblond <eric@regit.org>"); +MODULE_ALIAS_NFT_EXPR("queue"); diff --git a/net/netfilter/nft_reject.c b/net/netfilter/nft_reject.c new file mode 100644 index 000000000000..0d690d4101d2 --- /dev/null +++ b/net/netfilter/nft_reject.c @@ -0,0 +1,144 @@ +/* + * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> + * Copyright (c) 2013 Eric Leblond <eric@regit.org> + * + * 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. + * + * Development of this code funded by Astaro AG (http://www.astaro.com/) + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/netlink.h> +#include <linux/netfilter.h> +#include <linux/netfilter/nf_tables.h> +#include <net/netfilter/nf_tables.h> +#include <net/icmp.h> +#include <net/netfilter/ipv4/nf_reject.h> + +#if IS_ENABLED(CONFIG_NF_TABLES_IPV6) +#include <net/netfilter/ipv6/nf_reject.h> +#endif + +struct nft_reject { + enum nft_reject_types type:8; + u8 icmp_code; + u8 family; +}; + +static void nft_reject_eval(const struct nft_expr *expr, + struct nft_data data[NFT_REG_MAX + 1], + const struct nft_pktinfo *pkt) +{ + struct nft_reject *priv = nft_expr_priv(expr); + struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out); + + switch (priv->type) { + case NFT_REJECT_ICMP_UNREACH: + if (priv->family == NFPROTO_IPV4) + nf_send_unreach(pkt->skb, priv->icmp_code); +#if IS_ENABLED(CONFIG_NF_TABLES_IPV6) + else if (priv->family == NFPROTO_IPV6) + nf_send_unreach6(net, pkt->skb, priv->icmp_code, + pkt->hooknum); +#endif + break; + case NFT_REJECT_TCP_RST: + if (priv->family == NFPROTO_IPV4) + nf_send_reset(pkt->skb, pkt->hooknum); +#if IS_ENABLED(CONFIG_NF_TABLES_IPV6) + else if (priv->family == NFPROTO_IPV6) + nf_send_reset6(net, pkt->skb, pkt->hooknum); +#endif + break; + } + + data[NFT_REG_VERDICT].verdict = NF_DROP; +} + +static const struct nla_policy nft_reject_policy[NFTA_REJECT_MAX + 1] = { + [NFTA_REJECT_TYPE] = { .type = NLA_U32 }, + [NFTA_REJECT_ICMP_CODE] = { .type = NLA_U8 }, +}; + +static int nft_reject_init(const struct nft_ctx *ctx, + const struct nft_expr *expr, + const struct nlattr * const tb[]) +{ + struct nft_reject *priv = nft_expr_priv(expr); + + if (tb[NFTA_REJECT_TYPE] == NULL) + return -EINVAL; + + priv->family = ctx->afi->family; + priv->type = ntohl(nla_get_be32(tb[NFTA_REJECT_TYPE])); + switch (priv->type) { + case NFT_REJECT_ICMP_UNREACH: + if (tb[NFTA_REJECT_ICMP_CODE] == NULL) + return -EINVAL; + priv->icmp_code = nla_get_u8(tb[NFTA_REJECT_ICMP_CODE]); + case NFT_REJECT_TCP_RST: + break; + default: + return -EINVAL; + } + + return 0; +} + +static int nft_reject_dump(struct sk_buff *skb, const struct nft_expr *expr) +{ + const struct nft_reject *priv = nft_expr_priv(expr); + + if (nla_put_be32(skb, NFTA_REJECT_TYPE, htonl(priv->type))) + goto nla_put_failure; + + switch (priv->type) { + case NFT_REJECT_ICMP_UNREACH: + if (nla_put_u8(skb, NFTA_REJECT_ICMP_CODE, priv->icmp_code)) + goto nla_put_failure; + break; + } + + return 0; + +nla_put_failure: + return -1; +} + +static struct nft_expr_type nft_reject_type; +static const struct nft_expr_ops nft_reject_ops = { + .type = &nft_reject_type, + .size = NFT_EXPR_SIZE(sizeof(struct nft_reject)), + .eval = nft_reject_eval, + .init = nft_reject_init, + .dump = nft_reject_dump, +}; + +static struct nft_expr_type nft_reject_type __read_mostly = { + .name = "reject", + .ops = &nft_reject_ops, + .policy = nft_reject_policy, + .maxattr = NFTA_REJECT_MAX, + .owner = THIS_MODULE, +}; + +static int __init nft_reject_module_init(void) +{ + return nft_register_expr(&nft_reject_type); +} + +static void __exit nft_reject_module_exit(void) +{ + nft_unregister_expr(&nft_reject_type); +} + +module_init(nft_reject_module_init); +module_exit(nft_reject_module_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); +MODULE_ALIAS_NFT_EXPR("reject"); diff --git a/net/netfilter/xt_NFQUEUE.c b/net/netfilter/xt_NFQUEUE.c index ed00fef58996..8f1779ff7e30 100644 --- a/net/netfilter/xt_NFQUEUE.c +++ b/net/netfilter/xt_NFQUEUE.c @@ -11,15 +11,13 @@ #include <linux/module.h> #include <linux/skbuff.h> -#include <linux/ip.h> -#include <linux/ipv6.h> -#include <linux/jhash.h> - #include <linux/netfilter.h> #include <linux/netfilter_arp.h> #include <linux/netfilter/x_tables.h> #include <linux/netfilter/xt_NFQUEUE.h> +#include <net/netfilter/nf_queue.h> + MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); MODULE_DESCRIPTION("Xtables: packet forwarding to netlink"); MODULE_LICENSE("GPL"); @@ -28,7 +26,6 @@ MODULE_ALIAS("ip6t_NFQUEUE"); MODULE_ALIAS("arpt_NFQUEUE"); static u32 jhash_initval __read_mostly; -static bool rnd_inited __read_mostly; static unsigned int nfqueue_tg(struct sk_buff *skb, const struct xt_action_param *par) @@ -38,69 +35,16 @@ nfqueue_tg(struct sk_buff *skb, const struct xt_action_param *par) return NF_QUEUE_NR(tinfo->queuenum); } -static u32 hash_v4(const struct sk_buff *skb) -{ - const struct iphdr *iph = ip_hdr(skb); - - /* packets in either direction go into same queue */ - if ((__force u32)iph->saddr < (__force u32)iph->daddr) - return jhash_3words((__force u32)iph->saddr, - (__force u32)iph->daddr, iph->protocol, jhash_initval); - - return jhash_3words((__force u32)iph->daddr, - (__force u32)iph->saddr, iph->protocol, jhash_initval); -} - -#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) -static u32 hash_v6(const struct sk_buff *skb) -{ - const struct ipv6hdr *ip6h = ipv6_hdr(skb); - u32 a, b, c; - - if ((__force u32)ip6h->saddr.s6_addr32[3] < - (__force u32)ip6h->daddr.s6_addr32[3]) { - a = (__force u32) ip6h->saddr.s6_addr32[3]; - b = (__force u32) ip6h->daddr.s6_addr32[3]; - } else { - b = (__force u32) ip6h->saddr.s6_addr32[3]; - a = (__force u32) ip6h->daddr.s6_addr32[3]; - } - - if ((__force u32)ip6h->saddr.s6_addr32[1] < - (__force u32)ip6h->daddr.s6_addr32[1]) - c = (__force u32) ip6h->saddr.s6_addr32[1]; - else - c = (__force u32) ip6h->daddr.s6_addr32[1]; - - return jhash_3words(a, b, c, jhash_initval); -} -#endif - -static u32 -nfqueue_hash(const struct sk_buff *skb, const struct xt_action_param *par) -{ - const struct xt_NFQ_info_v1 *info = par->targinfo; - u32 queue = info->queuenum; - - if (par->family == NFPROTO_IPV4) - queue += ((u64) hash_v4(skb) * info->queues_total) >> 32; -#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) - else if (par->family == NFPROTO_IPV6) - queue += ((u64) hash_v6(skb) * info->queues_total) >> 32; -#endif - - return queue; -} - static unsigned int nfqueue_tg_v1(struct sk_buff *skb, const struct xt_action_param *par) { const struct xt_NFQ_info_v1 *info = par->targinfo; u32 queue = info->queuenum; - if (info->queues_total > 1) - queue = nfqueue_hash(skb, par); - + if (info->queues_total > 1) { + queue = nfqueue_hash(skb, queue, info->queues_total, + par->family, jhash_initval); + } return NF_QUEUE_NR(queue); } @@ -120,10 +64,8 @@ static int nfqueue_tg_check(const struct xt_tgchk_param *par) const struct xt_NFQ_info_v3 *info = par->targinfo; u32 maxid; - if (unlikely(!rnd_inited)) { - get_random_bytes(&jhash_initval, sizeof(jhash_initval)); - rnd_inited = true; - } + init_hashrandom(&jhash_initval); + if (info->queues_total == 0) { pr_err("NFQUEUE: number of total queues is 0\n"); return -EINVAL; @@ -154,8 +96,10 @@ nfqueue_tg_v3(struct sk_buff *skb, const struct xt_action_param *par) int cpu = smp_processor_id(); queue = info->queuenum + cpu % info->queues_total; - } else - queue = nfqueue_hash(skb, par); + } else { + queue = nfqueue_hash(skb, queue, info->queues_total, + par->family, jhash_initval); + } } ret = NF_QUEUE_NR(queue); |