@@ -515,6 +515,16 @@ ip_set_init_skbinfo(struct ip_set_skbinfo *skbinfo,
*skbinfo = ext->skbinfo;
}
+static inline void
+nf_inet_addr_mask_inplace(union nf_inet_addr *a1,
+ const union nf_inet_addr *mask)
+{
+ a1->all[0] &= mask->all[0];
+ a1->all[1] &= mask->all[1];
+ a1->all[2] &= mask->all[2];
+ a1->all[3] &= mask->all[3];
+}
+
#define IP_SET_INIT_KEXT(skb, opt, set) \
{ .bytes = (skb)->len, .packets = 1, .target = true,\
.timeout = ip_set_adt_opt_timeout(opt, set) }
@@ -89,6 +89,7 @@ enum {
IPSET_ATTR_CADT_LINENO = IPSET_ATTR_LINENO, /* 9 */
IPSET_ATTR_MARK, /* 10 */
IPSET_ATTR_MARKMASK, /* 11 */
+ IPSET_ATTR_BITMASK, /* 12 */
/* Reserve empty slots */
IPSET_ATTR_CADT_MAX = 16,
/* Create-only specific attributes */
@@ -157,6 +158,7 @@ enum ipset_errno {
IPSET_ERR_COMMENT,
IPSET_ERR_INVALID_MARKMASK,
IPSET_ERR_SKBINFO,
+ IPSET_ERR_BITMASK_NETMASK_EXCL,
/* Type specific error codes */
IPSET_ERR_TYPE_SPECIFIC = 4352,
@@ -182,6 +182,17 @@ htable_size(u8 hbits)
(SET_WITH_TIMEOUT(set) && \
ip_set_timeout_expired(ext_timeout(d, set)))
+#if defined(IP_SET_HASH_WITH_NETMASK) || defined(IP_SET_HASH_WITH_BITMASK)
+static const union nf_inet_addr onesmask = {
+ .all[0] = 0xffffffff,
+ .all[1] = 0xffffffff,
+ .all[2] = 0xffffffff,
+ .all[3] = 0xffffffff
+};
+
+static const union nf_inet_addr zeromask = {};
+#endif
+
#endif /* _IP_SET_HASH_GEN_H */
#ifndef MTYPE
@@ -306,8 +317,9 @@ struct htype {
u32 markmask; /* markmask value for mark mask to store */
#endif
u8 bucketsize; /* max elements in an array block */
-#ifdef IP_SET_HASH_WITH_NETMASK
+#if defined(IP_SET_HASH_WITH_NETMASK) || defined(IP_SET_HASH_WITH_BITMASK)
u8 netmask; /* netmask value for subnets to store */
+ union nf_inet_addr bitmask; /* stores bitmask */
#endif
struct list_head ad; /* Resize add|del backlist */
struct mtype_elem next; /* temporary storage for uadd */
@@ -482,8 +494,8 @@ mtype_same_set(const struct ip_set *a, const struct ip_set *b)
/* Resizing changes htable_bits, so we ignore it */
return x->maxelem == y->maxelem &&
a->timeout == b->timeout &&
-#ifdef IP_SET_HASH_WITH_NETMASK
- x->netmask == y->netmask &&
+#if defined(IP_SET_HASH_WITH_NETMASK) || defined(IP_SET_HASH_WITH_BITMASK)
+ nf_inet_addr_cmp(&x->bitmask, &y->bitmask) &&
#endif
#ifdef IP_SET_HASH_WITH_MARKMASK
x->markmask == y->markmask &&
@@ -1282,9 +1294,21 @@ mtype_head(struct ip_set *set, struct sk_buff *skb)
htonl(jhash_size(htable_bits))) ||
nla_put_net32(skb, IPSET_ATTR_MAXELEM, htonl(h->maxelem)))
goto nla_put_failure;
+#ifdef IP_SET_HASH_WITH_BITMASK
+ /* if netmask is set to anything other than HOST_MASK we know that the user supplied netmask
+ * and not bitmask. These two are mutually exclusive. */
+ if (h->netmask == HOST_MASK && !nf_inet_addr_cmp(&onesmask, &h->bitmask)) {
+ if (set->family == NFPROTO_IPV4) {
+ if (nla_put_ipaddr4(skb, IPSET_ATTR_BITMASK, h->bitmask.ip))
+ goto nla_put_failure;
+ } else if (set->family == NFPROTO_IPV6) {
+ if (nla_put_ipaddr6(skb, IPSET_ATTR_BITMASK, &h->bitmask.in6))
+ goto nla_put_failure;
+ }
+ }
+#endif
#ifdef IP_SET_HASH_WITH_NETMASK
- if (h->netmask != HOST_MASK &&
- nla_put_u8(skb, IPSET_ATTR_NETMASK, h->netmask))
+ if (h->netmask != HOST_MASK && nla_put_u8(skb, IPSET_ATTR_NETMASK, h->netmask))
goto nla_put_failure;
#endif
#ifdef IP_SET_HASH_WITH_MARKMASK
@@ -1447,8 +1471,10 @@ IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set,
u32 markmask;
#endif
u8 hbits;
-#ifdef IP_SET_HASH_WITH_NETMASK
- u8 netmask;
+#if defined(IP_SET_HASH_WITH_NETMASK) || defined(IP_SET_HASH_WITH_BITMASK)
+ int ret __attribute__((unused)) = 0;
+ u8 netmask = set->family == NFPROTO_IPV4 ? 32 : 128;
+ union nf_inet_addr bitmask = onesmask;
#endif
size_t hsize;
struct htype *h;
@@ -1486,7 +1512,6 @@ IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set,
#endif
#ifdef IP_SET_HASH_WITH_NETMASK
- netmask = set->family == NFPROTO_IPV4 ? 32 : 128;
if (tb[IPSET_ATTR_NETMASK]) {
netmask = nla_get_u8(tb[IPSET_ATTR_NETMASK]);
@@ -1494,6 +1519,33 @@ IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set,
(set->family == NFPROTO_IPV6 && netmask > 128) ||
netmask == 0)
return -IPSET_ERR_INVALID_NETMASK;
+
+ /* we convert netmask to bitmask and store it */
+ if (set->family == NFPROTO_IPV4)
+ bitmask.ip = ip_set_netmask(netmask);
+ else
+ ip6_netmask(&bitmask, netmask);
+ }
+#endif
+
+#ifdef IP_SET_HASH_WITH_BITMASK
+ if (tb[IPSET_ATTR_BITMASK]) {
+ /* bitmask and netmask do the same thing, allow only one of these options */
+ if (tb[IPSET_ATTR_NETMASK])
+ return -IPSET_ERR_BITMASK_NETMASK_EXCL;
+
+ if (set->family == NFPROTO_IPV4) {
+ ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_BITMASK], &bitmask.ip);
+ if (ret || !bitmask.ip)
+ return -IPSET_ERR_INVALID_NETMASK;
+ } else if (set->family == NFPROTO_IPV6) {
+ ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_BITMASK], &bitmask);
+ if (ret || ipv6_addr_any(&bitmask.in6))
+ return -IPSET_ERR_INVALID_NETMASK;
+ }
+
+ if (nf_inet_addr_cmp(&bitmask, &zeromask))
+ return -IPSET_ERR_INVALID_NETMASK;
}
#endif
@@ -1536,7 +1588,8 @@ IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set,
for (i = 0; i < ahash_numof_locks(hbits); i++)
spin_lock_init(&t->hregion[i].lock);
h->maxelem = maxelem;
-#ifdef IP_SET_HASH_WITH_NETMASK
+#if defined(IP_SET_HASH_WITH_NETMASK) || defined(IP_SET_HASH_WITH_BITMASK)
+ h->bitmask = bitmask;
h->netmask = netmask;
#endif
#ifdef IP_SET_HASH_WITH_MARKMASK
@@ -24,7 +24,8 @@
/* 2 Comments support */
/* 3 Forceadd support */
/* 4 skbinfo support */
-#define IPSET_TYPE_REV_MAX 5 /* bucketsize, initval support */
+/* 5 bucketsize, initval support */
+#define IPSET_TYPE_REV_MAX 6 /* bitmask support */
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
@@ -34,6 +35,7 @@ MODULE_ALIAS("ip_set_hash:ip");
/* Type specific function prefix */
#define HTYPE hash_ip
#define IP_SET_HASH_WITH_NETMASK
+#define IP_SET_HASH_WITH_BITMASK
/* IPv4 variant */
@@ -86,7 +88,7 @@ hash_ip4_kadt(struct ip_set *set, const struct sk_buff *skb,
__be32 ip;
ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &ip);
- ip &= ip_set_netmask(h->netmask);
+ ip &= h->bitmask.ip;
if (ip == 0)
return -EINVAL;
@@ -119,7 +121,7 @@ hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[],
if (ret)
return ret;
- ip &= ip_set_hostmask(h->netmask);
+ ip &= ntohl(h->bitmask.ip);
e.ip = htonl(ip);
if (e.ip == 0)
return -IPSET_ERR_HASH_ELEM;
@@ -185,12 +187,6 @@ hash_ip6_data_equal(const struct hash_ip6_elem *ip1,
return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6);
}
-static void
-hash_ip6_netmask(union nf_inet_addr *ip, u8 prefix)
-{
- ip6_netmask(ip, prefix);
-}
-
static bool
hash_ip6_data_list(struct sk_buff *skb, const struct hash_ip6_elem *e)
{
@@ -227,7 +223,7 @@ hash_ip6_kadt(struct ip_set *set, const struct sk_buff *skb,
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
- hash_ip6_netmask(&e.ip, h->netmask);
+ nf_inet_addr_mask_inplace(&e.ip, &h->bitmask);
if (ipv6_addr_any(&e.ip.in6))
return -EINVAL;
@@ -266,7 +262,7 @@ hash_ip6_uadt(struct ip_set *set, struct nlattr *tb[],
if (ret)
return ret;
- hash_ip6_netmask(&e.ip, h->netmask);
+ nf_inet_addr_mask_inplace(&e.ip, &h->bitmask);
if (ipv6_addr_any(&e.ip.in6))
return -IPSET_ERR_HASH_ELEM;
@@ -293,6 +289,7 @@ static struct ip_set_type hash_ip_type __read_mostly = {
[IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPSET_ATTR_NETMASK] = { .type = NLA_U8 },
+ [IPSET_ATTR_BITMASK] = { .type = NLA_NESTED },
[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
},
.adt_policy = {
@@ -26,7 +26,8 @@
/* 3 Comments support added */
/* 4 Forceadd support added */
/* 5 skbinfo support added */
-#define IPSET_TYPE_REV_MAX 6 /* bucketsize, initval support added */
+/* 6 bucketsize, initval support added */
+#define IPSET_TYPE_REV_MAX 7 /* bitmask support added */
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
@@ -35,6 +36,8 @@ MODULE_ALIAS("ip_set_hash:ip,port");
/* Type specific function prefix */
#define HTYPE hash_ipport
+#define IP_SET_HASH_WITH_NETMASK
+#define IP_SET_HASH_WITH_BITMASK
/* IPv4 variant */
@@ -92,12 +95,16 @@ hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_ipport4_elem e = { .ip = 0 };
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
+ const struct MTYPE *h = set->data;
if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
&e.port, &e.proto))
return -EINVAL;
ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
+ e.ip &= h->bitmask.ip;
+ if (e.ip == 0)
+ return -EINVAL;
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
@@ -129,6 +136,10 @@ hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
if (ret)
return ret;
+ e.ip &= h->bitmask.ip;
+ if (e.ip == 0)
+ return -EINVAL;
+
e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
if (tb[IPSET_ATTR_PROTO]) {
@@ -253,12 +264,17 @@ hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
+ const struct MTYPE *h = set->data;
if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
&e.port, &e.proto))
return -EINVAL;
ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
+ nf_inet_addr_mask_inplace(&e.ip, &h->bitmask);
+ if (ipv6_addr_any(&e.ip.in6))
+ return -EINVAL;
+
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
@@ -298,6 +314,10 @@ hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
if (ret)
return ret;
+ nf_inet_addr_mask_inplace(&e.ip, &h->bitmask);
+ if (ipv6_addr_any(&e.ip.in6))
+ return -EINVAL;
+
e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
if (tb[IPSET_ATTR_PROTO]) {
@@ -356,6 +376,8 @@ static struct ip_set_type hash_ipport_type __read_mostly = {
[IPSET_ATTR_PROTO] = { .type = NLA_U8 },
[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
+ [IPSET_ATTR_NETMASK] = { .type = NLA_U8 },
+ [IPSET_ATTR_BITMASK] = { .type = NLA_NESTED },
},
.adt_policy = {
[IPSET_ATTR_IP] = { .type = NLA_NESTED },
@@ -23,7 +23,8 @@
#define IPSET_TYPE_REV_MIN 0
/* 1 Forceadd support added */
/* 2 skbinfo support added */
-#define IPSET_TYPE_REV_MAX 3 /* bucketsize, initval support added */
+/* 3 bucketsize, initval support added */
+#define IPSET_TYPE_REV_MAX 4 /* bitmask support added */
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>");
@@ -33,6 +34,8 @@ MODULE_ALIAS("ip_set_hash:net,net");
/* Type specific function prefix */
#define HTYPE hash_netnet
#define IP_SET_HASH_WITH_NETS
+#define IP_SET_HASH_WITH_NETMASK
+#define IP_SET_HASH_WITH_BITMASK
#define IPSET_NET_COUNT 2
/* IPv4 variants */
@@ -153,8 +156,8 @@ hash_netnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
ip4addrptr(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.ip[1]);
- e.ip[0] &= ip_set_netmask(e.cidr[0]);
- e.ip[1] &= ip_set_netmask(e.cidr[1]);
+ e.ip[0] &= (ip_set_netmask(e.cidr[0]) & h->bitmask.ip);
+ e.ip[1] &= (ip_set_netmask(e.cidr[1]) & h->bitmask.ip);
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
@@ -213,8 +216,8 @@ hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] ||
tb[IPSET_ATTR_IP2_TO])) {
- e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
- e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
+ e.ip[0] = htonl(ip & ntohl(h->bitmask.ip) & ip_set_hostmask(e.cidr[0]));
+ e.ip[1] = htonl(ip2_from & ntohl(h->bitmask.ip) & ip_set_hostmask(e.cidr[1]));
ret = adtfn(set, &e, &ext, &ext, flags);
return ip_set_enomatch(ret, flags, adt, set) ? -ret :
ip_set_eexist(ret, flags) ? 0 : ret;
@@ -404,6 +407,11 @@ hash_netnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
ip6_netmask(&e.ip[0], e.cidr[0]);
ip6_netmask(&e.ip[1], e.cidr[1]);
+ nf_inet_addr_mask_inplace(&e.ip[0], &h->bitmask);
+ nf_inet_addr_mask_inplace(&e.ip[1], &h->bitmask);
+ if (e.cidr[0] == HOST_MASK && ipv6_addr_any(&e.ip[0].in6))
+ return -EINVAL;
+
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
@@ -414,6 +422,7 @@ hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netnet6_elem e = { };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
+ const struct hash_netnet6 *h = set->data;
int ret;
if (tb[IPSET_ATTR_LINENO])
@@ -453,6 +462,11 @@ hash_netnet6_uadt(struct ip_set *set, struct nlattr *tb[],
ip6_netmask(&e.ip[0], e.cidr[0]);
ip6_netmask(&e.ip[1], e.cidr[1]);
+ nf_inet_addr_mask_inplace(&e.ip[0], &h->bitmask);
+ nf_inet_addr_mask_inplace(&e.ip[1], &h->bitmask);
+ if (e.cidr[0] == HOST_MASK && ipv6_addr_any(&e.ip[0].in6))
+ return -IPSET_ERR_HASH_ELEM;
+
if (tb[IPSET_ATTR_CADT_FLAGS]) {
u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
@@ -484,6 +498,8 @@ static struct ip_set_type hash_netnet_type __read_mostly = {
[IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
+ [IPSET_ATTR_NETMASK] = { .type = NLA_U8 },
+ [IPSET_ATTR_BITMASK] = { .type = NLA_NESTED },
},
.adt_policy = {
[IPSET_ATTR_IP] = { .type = NLA_NESTED },