--- /dev/null
+/* Copyright (C) 2003-2011 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
+ * published by the Free Software Foundation.
+ */
+
+/* Kernel module implementing an IP set type: the hash:ip,port,ip type */
+
+#include <linux/jhash.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/uaccess.h>
+#include <linux/bitops.h>
+#include <linux/spinlock.h>
+#include <linux/random.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/netlink.h>
+#include <net/tcp.h>
+
+#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_getport.h>
+#include <linux/netfilter/ipset/ip_set_hash.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
+MODULE_DESCRIPTION("hash:ip,port,ip type of IP sets");
+MODULE_ALIAS("ip_set_hash:ip,port,ip");
+
+/* Type specific function prefix */
+#define TYPE hash_ipportip
+
+static bool
+hash_ipportip_same_set(const struct ip_set *a, const struct ip_set *b);
+
+#define hash_ipportip4_same_set hash_ipportip_same_set
+#define hash_ipportip6_same_set hash_ipportip_same_set
+
+/* The type variant functions: IPv4 */
+
+/* Member elements without timeout */
+struct hash_ipportip4_elem {
+ __be32 ip;
+ __be32 ip2;
+ __be16 port;
+ u8 proto;
+ u8 padding;
+};
+
+/* Member elements with timeout support */
+struct hash_ipportip4_telem {
+ __be32 ip;
+ __be32 ip2;
+ __be16 port;
+ u8 proto;
+ u8 padding;
+ unsigned long timeout;
+};
+
+static inline bool
+hash_ipportip4_data_equal(const struct hash_ipportip4_elem *ip1,
+ const struct hash_ipportip4_elem *ip2)
+{
+ return ip1->ip == ip2->ip &&
+ ip1->ip2 == ip2->ip2 &&
+ ip1->port == ip2->port &&
+ ip1->proto == ip2->proto;
+}
+
+static inline bool
+hash_ipportip4_data_isnull(const struct hash_ipportip4_elem *elem)
+{
+ return elem->proto == 0;
+}
+
+static inline void
+hash_ipportip4_data_copy(struct hash_ipportip4_elem *dst,
+ const struct hash_ipportip4_elem *src)
+{
+ memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_ipportip4_data_zero_out(struct hash_ipportip4_elem *elem)
+{
+ elem->proto = 0;
+}
+
+static bool
+hash_ipportip4_data_list(struct sk_buff *skb,
+ const struct hash_ipportip4_elem *data)
+{
+ NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+ NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, data->ip2);
+ NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+ NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+static bool
+hash_ipportip4_data_tlist(struct sk_buff *skb,
+ const struct hash_ipportip4_elem *data)
+{
+ const struct hash_ipportip4_telem *tdata =
+ (const struct hash_ipportip4_telem *)data;
+
+ NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
+ NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, tdata->ip2);
+ NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
+ NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+ NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+ htonl(ip_set_timeout_get(tdata->timeout)));
+
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+#define PF 4
+#define HOST_MASK 32
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_ipportip4_kadt(struct ip_set *set, const struct sk_buff *skb,
+ enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+ const struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_ipportip4_elem data = { };
+
+ if (!ip_set_get_ip4_port(skb, flags & IPSET_DIM_TWO_SRC,
+ &data.port, &data.proto))
+ return -EINVAL;
+
+ ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
+ ip4addrptr(skb, flags & IPSET_DIM_THREE_SRC, &data.ip2);
+
+ return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_ipportip4_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+ const struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_ipportip4_elem data = { };
+ u32 ip, ip_to, p, port, port_to;
+ u32 timeout = h->timeout;
+ int ret;
+
+ if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
+ !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_LINENO])
+ *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+ ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
+ if (ret)
+ return ret;
+
+ ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &data.ip2);
+ if (ret)
+ return ret;
+
+ if (tb[IPSET_ATTR_PORT])
+ data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+ else
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_PROTO]) {
+ data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+ if (data.proto == 0)
+ return -IPSET_ERR_INVALID_PROTO;
+ } else
+ return -IPSET_ERR_MISSING_PROTO;
+
+ switch (data.proto) {
+ case IPPROTO_UDP:
+ case IPPROTO_TCP:
+ case IPPROTO_ICMP:
+ break;
+ default:
+ data.port = 0;
+ break;
+ }
+
+ 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 ||
+ !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+ !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
+ tb[IPSET_ATTR_PORT_TO])) {
+ ret = adtfn(set, &data, timeout);
+ return ip_set_eexist(ret, flags) ? 0 : ret;
+ }
+
+ ip = ntohl(data.ip);
+ if (tb[IPSET_ATTR_IP_TO]) {
+ ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
+ if (ret)
+ return ret;
+ if (ip > ip_to)
+ swap(ip, ip_to);
+ } else if (tb[IPSET_ATTR_CIDR]) {
+ u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+
+ if (cidr > 32)
+ return -IPSET_ERR_INVALID_CIDR;
+ ip &= ip_set_hostmask(cidr);
+ ip_to = ip | ~ip_set_hostmask(cidr);
+ } else
+ ip_to = ip;
+
+ port = ntohs(data.port);
+ if (tb[IPSET_ATTR_PORT_TO]) {
+ port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+ if (port > port_to)
+ swap(port, port_to);
+ } else
+ port_to = port;
+
+ for (; !before(ip_to, ip); ip++)
+ for (p = port; p <= port_to; p++) {
+ data.ip = htonl(ip);
+ data.port = htons(p);
+ ret = adtfn(set, &data, timeout);
+
+ if (ret && !ip_set_eexist(ret, flags))
+ return ret;
+ else
+ ret = 0;
+ }
+ return ret;
+}
+
+static bool
+hash_ipportip_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;
+}
+
+/* The type variant functions: IPv6 */
+
+struct hash_ipportip6_elem {
+ union nf_inet_addr ip;
+ union nf_inet_addr ip2;
+ __be16 port;
+ u8 proto;
+ u8 padding;
+};
+
+struct hash_ipportip6_telem {
+ union nf_inet_addr ip;
+ union nf_inet_addr ip2;
+ __be16 port;
+ u8 proto;
+ u8 padding;
+ unsigned long timeout;
+};
+
+static inline bool
+hash_ipportip6_data_equal(const struct hash_ipportip6_elem *ip1,
+ const struct hash_ipportip6_elem *ip2)
+{
+ return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
+ ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 &&
+ ip1->port == ip2->port &&
+ ip1->proto == ip2->proto;
+}
+
+static inline bool
+hash_ipportip6_data_isnull(const struct hash_ipportip6_elem *elem)
+{
+ return elem->proto == 0;
+}
+
+static inline void
+hash_ipportip6_data_copy(struct hash_ipportip6_elem *dst,
+ const struct hash_ipportip6_elem *src)
+{
+ memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_ipportip6_data_zero_out(struct hash_ipportip6_elem *elem)
+{
+ elem->proto = 0;
+}
+
+static bool
+hash_ipportip6_data_list(struct sk_buff *skb,
+ const struct hash_ipportip6_elem *data)
+{
+ NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
+ NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
+ NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+ NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+static bool
+hash_ipportip6_data_tlist(struct sk_buff *skb,
+ const struct hash_ipportip6_elem *data)
+{
+ const struct hash_ipportip6_telem *e =
+ (const struct hash_ipportip6_telem *)data;
+
+ NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
+ NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
+ NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+ NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+ NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+ htonl(ip_set_timeout_get(e->timeout)));
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+#undef PF
+#undef HOST_MASK
+
+#define PF 6
+#define HOST_MASK 128
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_ipportip6_kadt(struct ip_set *set, const struct sk_buff *skb,
+ enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+ const struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_ipportip6_elem data = { };
+
+ if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
+ &data.port, &data.proto))
+ return -EINVAL;
+
+ ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
+ ip6addrptr(skb, flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
+
+ return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_ipportip6_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+ const struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_ipportip6_elem data = { };
+ u32 port, port_to;
+ u32 timeout = h->timeout;
+ int ret;
+
+ if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
+ !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+ tb[IPSET_ATTR_IP_TO] ||
+ tb[IPSET_ATTR_CIDR]))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_LINENO])
+ *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+ ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
+ if (ret)
+ return ret;
+
+ ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
+ if (ret)
+ return ret;
+
+ if (tb[IPSET_ATTR_PORT])
+ data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+ else
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_PROTO]) {
+ data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+ if (data.proto == 0)
+ return -IPSET_ERR_INVALID_PROTO;
+ } else
+ return -IPSET_ERR_MISSING_PROTO;
+
+ switch (data.proto) {
+ case IPPROTO_UDP:
+ case IPPROTO_TCP:
+ case IPPROTO_ICMPV6:
+ break;
+ default:
+ data.port = 0;
+ break;
+ }
+
+ 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 ||
+ !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+ !tb[IPSET_ATTR_PORT_TO]) {
+ ret = adtfn(set, &data, timeout);
+ return ip_set_eexist(ret, flags) ? 0 : ret;
+ }
+
+ port = ntohs(data.port);
+ port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+ if (port > port_to)
+ swap(port, port_to);
+
+ for (; port <= port_to; port++) {
+ data.port = htons(port);
+ ret = adtfn(set, &data, timeout);
+
+ if (ret && !ip_set_eexist(ret, flags))
+ return ret;
+ else
+ ret = 0;
+ }
+ return ret;
+}
+
+/* Create hash:ip type of sets */
+
+static int
+hash_ipportip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+ struct ip_set_hash *h;
+ u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
+ u8 hbits;
+
+ if (!(set->family == AF_INET || set->family == AF_INET6))
+ return -IPSET_ERR_INVALID_FAMILY;
+
+ 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]);
+
+ h = kzalloc(sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return -ENOMEM;
+
+ h->maxelem = maxelem;
+ get_random_bytes(&h->initval, sizeof(h->initval));
+ h->timeout = IPSET_NO_TIMEOUT;
+
+ hbits = htable_bits(hashsize);
+ h->table = ip_set_alloc(
+ sizeof(struct htable)
+ + jhash_size(hbits) * sizeof(struct hbucket));
+ 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 == AF_INET
+ ? &hash_ipportip4_tvariant : &hash_ipportip6_tvariant;
+
+ if (set->family == AF_INET)
+ hash_ipportip4_gc_init(set);
+ else
+ hash_ipportip6_gc_init(set);
+ } else {
+ set->variant = set->family == AF_INET
+ ? &hash_ipportip4_variant : &hash_ipportip6_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_ipportip_type __read_mostly = {
+ .name = "hash:ip,port,ip",
+ .protocol = IPSET_PROTOCOL,
+ .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
+ .dimension = IPSET_DIM_THREE,
+ .family = AF_UNSPEC,
+ .revision = 0,
+ .create = hash_ipportip_create,
+ .create_policy = {
+ [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
+ [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
+ [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
+ [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ },
+ .adt_policy = {
+ [IPSET_ATTR_IP] = { .type = NLA_NESTED },
+ [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
+ [IPSET_ATTR_IP2] = { .type = NLA_NESTED },
+ [IPSET_ATTR_PORT] = { .type = NLA_U16 },
+ [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
+ [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
+ [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
+ },
+ .me = THIS_MODULE,
+};
+
+static int __init
+hash_ipportip_init(void)
+{
+ return ip_set_type_register(&hash_ipportip_type);
+}
+
+static void __exit
+hash_ipportip_fini(void)
+{
+ ip_set_type_unregister(&hash_ipportip_type);
+}
+
+module_init(hash_ipportip_init);
+module_exit(hash_ipportip_fini);
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff