diff options
author | Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> | 2013-04-09 00:50:55 +0400 |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2013-04-29 22:08:57 +0400 |
commit | 5d50e1d88336a9334348a338731c6a7bc4823d08 (patch) | |
tree | 3b1572add68fbb414ec8d386388feb588c6e5937 /net/netfilter/ipset/ip_set_hash_ip.c | |
parent | 1feab10d7e6ddb5e13d6a4bd93a1b877390262ec (diff) | |
download | linux-5d50e1d88336a9334348a338731c6a7bc4823d08.tar.xz |
netfilter: ipset: Hash types using the unified code base
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/ipset/ip_set_hash_ip.c')
-rw-r--r-- | net/netfilter/ipset/ip_set_hash_ip.c | 306 |
1 files changed, 69 insertions, 237 deletions
diff --git a/net/netfilter/ipset/ip_set_hash_ip.c b/net/netfilter/ipset/ip_set_hash_ip.c index c486ad2d43b7..2fcfb21d9f3c 100644 --- a/net/netfilter/ipset/ip_set_hash_ip.c +++ b/net/netfilter/ipset/ip_set_hash_ip.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> +/* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> * * 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 @@ -21,7 +21,6 @@ #include <linux/netfilter.h> #include <linux/netfilter/ipset/pfxlen.h> #include <linux/netfilter/ipset/ip_set.h> -#include <linux/netfilter/ipset/ip_set_timeout.h> #include <linux/netfilter/ipset/ip_set_hash.h> #define REVISION_MIN 0 @@ -33,58 +32,36 @@ IP_SET_MODULE_DESC("hash:ip", REVISION_MIN, REVISION_MAX); MODULE_ALIAS("ip_set_hash:ip"); /* Type specific function prefix */ -#define TYPE hash_ip - -static bool -hash_ip_same_set(const struct ip_set *a, const struct ip_set *b); - -#define hash_ip4_same_set hash_ip_same_set -#define hash_ip6_same_set hash_ip_same_set +#define HTYPE hash_ip +#define IP_SET_HASH_WITH_NETMASK -/* The type variant functions: IPv4 */ +/* IPv4 variants */ -/* Member elements without timeout */ +/* Member elements */ struct hash_ip4_elem { + /* Zero valued IP addresses cannot be stored */ __be32 ip; }; -/* Member elements with timeout support */ -struct hash_ip4_telem { +struct hash_ip4t_elem { __be32 ip; unsigned long timeout; }; -static inline bool -hash_ip4_data_equal(const struct hash_ip4_elem *ip1, - const struct hash_ip4_elem *ip2, - u32 *multi) -{ - return ip1->ip == ip2->ip; -} +/* Common functions */ static inline bool -hash_ip4_data_isnull(const struct hash_ip4_elem *elem) -{ - return elem->ip == 0; -} - -static inline void -hash_ip4_data_copy(struct hash_ip4_elem *dst, const struct hash_ip4_elem *src) -{ - dst->ip = src->ip; -} - -/* Zero valued IP addresses cannot be stored */ -static inline void -hash_ip4_data_zero_out(struct hash_ip4_elem *elem) +hash_ip4_data_equal(const struct hash_ip4_elem *e1, + const struct hash_ip4_elem *e2, + u32 *multi) { - elem->ip = 0; + return e1->ip == e2->ip; } static inline bool -hash_ip4_data_list(struct sk_buff *skb, const struct hash_ip4_elem *data) +hash_ip4_data_list(struct sk_buff *skb, const struct hash_ip4_elem *e) { - if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip)) + if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, e->ip)) goto nla_put_failure; return 0; @@ -92,41 +69,26 @@ nla_put_failure: return 1; } -static bool -hash_ip4_data_tlist(struct sk_buff *skb, const struct hash_ip4_elem *data) +static inline void +hash_ip4_data_next(struct hash_ip4_elem *next, const struct hash_ip4_elem *e) { - const struct hash_ip4_telem *tdata = - (const struct hash_ip4_telem *)data; - - if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, tdata->ip) || - nla_put_net32(skb, IPSET_ATTR_TIMEOUT, - htonl(ip_set_timeout_get(tdata->timeout)))) - goto nla_put_failure; - - return 0; - -nla_put_failure: - return 1; + next->ip = e->ip; } -#define IP_SET_HASH_WITH_NETMASK +#define MTYPE hash_ip4 #define PF 4 #define HOST_MASK 32 -#include <linux/netfilter/ipset/ip_set_ahash.h> - -static inline void -hash_ip4_data_next(struct ip_set_hash *h, const struct hash_ip4_elem *d) -{ - h->next.ip = d->ip; -} +#include "ip_set_hash_gen.h" static int hash_ip4_kadt(struct ip_set *set, const struct sk_buff *skb, const struct xt_action_param *par, - enum ipset_adt adt, const struct ip_set_adt_opt *opt) + enum ipset_adt adt, struct ip_set_adt_opt *opt) { - const struct ip_set_hash *h = set->data; + const struct hash_ip *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; + struct hash_ip4_elem e = {}; + struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h); __be32 ip; ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &ip); @@ -134,17 +96,19 @@ hash_ip4_kadt(struct ip_set *set, const struct sk_buff *skb, if (ip == 0) return -EINVAL; - return adtfn(set, &ip, opt_timeout(opt, h), opt->cmdflags); + e.ip = ip; + return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags); } static int hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[], enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) { - const struct ip_set_hash *h = set->data; + const struct hash_ip *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; - u32 ip, ip_to, hosts, timeout = h->timeout; - __be32 nip; + struct hash_ip4_elem e = {}; + struct ip_set_ext ext = IP_SET_INIT_UEXT(h); + u32 ip, ip_to, hosts; int ret = 0; if (unlikely(!tb[IPSET_ATTR_IP] || @@ -154,23 +118,18 @@ hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[], if (tb[IPSET_ATTR_LINENO]) *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); - ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip); + ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip) || + ip_set_get_extensions(set, tb, &ext); if (ret) return ret; ip &= ip_set_hostmask(h->netmask); - if (tb[IPSET_ATTR_TIMEOUT]) { - if (!with_timeout(h->timeout)) - return -IPSET_ERR_TIMEOUT; - timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); - } - if (adt == IPSET_TEST) { - nip = htonl(ip); - if (nip == 0) + e.ip = htonl(ip); + if (e.ip == 0) return -IPSET_ERR_HASH_ELEM; - return adtfn(set, &nip, timeout, flags); + return adtfn(set, &e, &ext, &ext, flags); } ip_to = ip; @@ -193,10 +152,10 @@ hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[], if (retried) ip = ntohl(h->next.ip); for (; !before(ip_to, ip); ip += hosts) { - nip = htonl(ip); - if (nip == 0) + e.ip = htonl(ip); + if (e.ip == 0) return -IPSET_ERR_HASH_ELEM; - ret = adtfn(set, &nip, timeout, flags); + ret = adtfn(set, &e, &ext, &ext, flags); if (ret && !ip_set_eexist(ret, flags)) return ret; @@ -206,29 +165,20 @@ hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[], return ret; } -static bool -hash_ip_same_set(const struct ip_set *a, const struct ip_set *b) -{ - const struct ip_set_hash *x = a->data; - const struct ip_set_hash *y = b->data; - - /* Resizing changes htable_bits, so we ignore it */ - return x->maxelem == y->maxelem && - x->timeout == y->timeout && - x->netmask == y->netmask; -} - -/* The type variant functions: IPv6 */ +/* IPv6 variants */ +/* Member elements */ struct hash_ip6_elem { union nf_inet_addr ip; }; -struct hash_ip6_telem { +struct hash_ip6t_elem { union nf_inet_addr ip; unsigned long timeout; }; +/* Common functions */ + static inline bool hash_ip6_data_equal(const struct hash_ip6_elem *ip1, const struct hash_ip6_elem *ip2, @@ -237,28 +187,16 @@ hash_ip6_data_equal(const struct hash_ip6_elem *ip1, return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6); } -static inline bool -hash_ip6_data_isnull(const struct hash_ip6_elem *elem) -{ - return ipv6_addr_any(&elem->ip.in6); -} - static inline void -hash_ip6_data_copy(struct hash_ip6_elem *dst, const struct hash_ip6_elem *src) +hash_ip6_netmask(union nf_inet_addr *ip, u8 prefix) { - dst->ip.in6 = src->ip.in6; -} - -static inline void -hash_ip6_data_zero_out(struct hash_ip6_elem *elem) -{ - ipv6_addr_set(&elem->ip.in6, 0, 0, 0, 0); + ip6_netmask(ip, prefix); } static bool -hash_ip6_data_list(struct sk_buff *skb, const struct hash_ip6_elem *data) +hash_ip6_data_list(struct sk_buff *skb, const struct hash_ip6_elem *e) { - if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6)) + if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6)) goto nla_put_failure; return 0; @@ -266,65 +204,49 @@ nla_put_failure: return 1; } -static bool -hash_ip6_data_tlist(struct sk_buff *skb, const struct hash_ip6_elem *data) +static inline void +hash_ip6_data_next(struct hash_ip4_elem *next, const struct hash_ip6_elem *e) { - const struct hash_ip6_telem *e = - (const struct hash_ip6_telem *)data; - - if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6) || - nla_put_net32(skb, IPSET_ATTR_TIMEOUT, - htonl(ip_set_timeout_get(e->timeout)))) - goto nla_put_failure; - return 0; - -nla_put_failure: - return 1; } +#undef MTYPE #undef PF #undef HOST_MASK +#undef HKEY_DATALEN +#define MTYPE hash_ip6 #define PF 6 #define HOST_MASK 128 -#include <linux/netfilter/ipset/ip_set_ahash.h> -static inline void -hash_ip6_data_next(struct ip_set_hash *h, const struct hash_ip6_elem *d) -{ -} +#define IP_SET_EMIT_CREATE +#include "ip_set_hash_gen.h" static int hash_ip6_kadt(struct ip_set *set, const struct sk_buff *skb, const struct xt_action_param *par, - enum ipset_adt adt, const struct ip_set_adt_opt *opt) + enum ipset_adt adt, struct ip_set_adt_opt *opt) { - const struct ip_set_hash *h = set->data; + const struct hash_ip *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; - union nf_inet_addr ip; + struct hash_ip6_elem e = {}; + struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h); - ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &ip.in6); - ip6_netmask(&ip, h->netmask); - if (ipv6_addr_any(&ip.in6)) + ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6); + hash_ip6_netmask(&e.ip, h->netmask); + if (ipv6_addr_any(&e.ip.in6)) return -EINVAL; - return adtfn(set, &ip, opt_timeout(opt, h), opt->cmdflags); + return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags); } -static const struct nla_policy hash_ip6_adt_policy[IPSET_ATTR_ADT_MAX + 1] = { - [IPSET_ATTR_IP] = { .type = NLA_NESTED }, - [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, - [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, -}; - static int hash_ip6_uadt(struct ip_set *set, struct nlattr *tb[], enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) { - const struct ip_set_hash *h = set->data; + const struct hash_ip *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; - union nf_inet_addr ip; - u32 timeout = h->timeout; + struct hash_ip6_elem e = {}; + struct ip_set_ext ext = IP_SET_INIT_UEXT(h); int ret; if (unlikely(!tb[IPSET_ATTR_IP] || @@ -336,110 +258,20 @@ hash_ip6_uadt(struct ip_set *set, struct nlattr *tb[], if (tb[IPSET_ATTR_LINENO]) *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); - ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &ip); + ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) || + ip_set_get_extensions(set, tb, &ext); if (ret) return ret; - ip6_netmask(&ip, h->netmask); - if (ipv6_addr_any(&ip.in6)) + hash_ip6_netmask(&e.ip, h->netmask); + if (ipv6_addr_any(&e.ip.in6)) return -IPSET_ERR_HASH_ELEM; - if (tb[IPSET_ATTR_TIMEOUT]) { - if (!with_timeout(h->timeout)) - return -IPSET_ERR_TIMEOUT; - timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); - } - - ret = adtfn(set, &ip, timeout, flags); + ret = adtfn(set, &e, &ext, &ext, flags); return ip_set_eexist(ret, flags) ? 0 : ret; } -/* Create hash:ip type of sets */ - -static int -hash_ip_create(struct ip_set *set, struct nlattr *tb[], u32 flags) -{ - u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM; - u8 netmask, hbits; - size_t hsize; - struct ip_set_hash *h; - - if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6)) - return -IPSET_ERR_INVALID_FAMILY; - netmask = set->family == NFPROTO_IPV4 ? 32 : 128; - pr_debug("Create set %s with family %s\n", - set->name, set->family == NFPROTO_IPV4 ? "inet" : "inet6"); - - if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) || - !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) || - !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) - return -IPSET_ERR_PROTOCOL; - - if (tb[IPSET_ATTR_HASHSIZE]) { - hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]); - if (hashsize < IPSET_MIMINAL_HASHSIZE) - hashsize = IPSET_MIMINAL_HASHSIZE; - } - - if (tb[IPSET_ATTR_MAXELEM]) - maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]); - - if (tb[IPSET_ATTR_NETMASK]) { - netmask = nla_get_u8(tb[IPSET_ATTR_NETMASK]); - - if ((set->family == NFPROTO_IPV4 && netmask > 32) || - (set->family == NFPROTO_IPV6 && netmask > 128) || - netmask == 0) - return -IPSET_ERR_INVALID_NETMASK; - } - - h = kzalloc(sizeof(*h), GFP_KERNEL); - if (!h) - return -ENOMEM; - - h->maxelem = maxelem; - h->netmask = netmask; - get_random_bytes(&h->initval, sizeof(h->initval)); - h->timeout = IPSET_NO_TIMEOUT; - - hbits = htable_bits(hashsize); - hsize = htable_size(hbits); - if (hsize == 0) { - kfree(h); - return -ENOMEM; - } - h->table = ip_set_alloc(hsize); - if (!h->table) { - kfree(h); - return -ENOMEM; - } - h->table->htable_bits = hbits; - - set->data = h; - - if (tb[IPSET_ATTR_TIMEOUT]) { - h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); - - set->variant = set->family == NFPROTO_IPV4 - ? &hash_ip4_tvariant : &hash_ip6_tvariant; - - if (set->family == NFPROTO_IPV4) - hash_ip4_gc_init(set); - else - hash_ip6_gc_init(set); - } else { - set->variant = set->family == NFPROTO_IPV4 - ? &hash_ip4_variant : &hash_ip6_variant; - } - - pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n", - set->name, jhash_size(h->table->htable_bits), - h->table->htable_bits, h->maxelem, set->data, h->table); - - return 0; -} - static struct ip_set_type hash_ip_type __read_mostly = { .name = "hash:ip", .protocol = IPSET_PROTOCOL, |