Release 4.7 net/netfilter/ipset/ip_set_hash_ipportip.c

/* 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
 * 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/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_getport.h>
#include <linux/netfilter/ipset/ip_set_hash.h>


#define IPSET_TYPE_REV_MIN	0
/*                              1    SCTP and UDPLITE support added */
/*                              2    Counters support added */
/*                              3    Comments support added */
/*                              4    Forceadd support added */

#define IPSET_TYPE_REV_MAX	5 
/* skbinfo support added */

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
IP_SET_MODULE_DESC("hash:ip,port,ip", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
MODULE_ALIAS("ip_set_hash:ip,port,ip");

/* Type specific function prefix */

#define HTYPE		hash_ipportip

/* IPv4 variant */

/* Member elements  */

struct hash_ipportip4_elem {
	
__be32 ip;
	
__be32 ip2;
	
__be16 port;
	
u8 proto;
	
u8 padding;
};


static inline bool

hash_ipportip4_data_equal(const struct hash_ipportip4_elem *ip1,
			  const struct hash_ipportip4_elem *ip2,
			  u32 *multi)
{
	return ip1->ip == ip2->ip &&
	       ip1->ip2 == ip2->ip2 &&
	       ip1->port == ip2->port &&
	       ip1->proto == ip2->proto;
}

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static bool

hash_ipportip4_data_list(struct sk_buff *skb,
			 const struct hash_ipportip4_elem *data)
{
	if (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))
		goto nla_put_failure;
	return false;

nla_put_failure:
	return true;
}

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david s. miller
13
17.57%
1
33.33%
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sergey popovich
2
2.70%
1
33.33%
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74
100.00%
3
100.00%


static inline void

hash_ipportip4_data_next(struct hash_ipportip4_elem *next,
			 const struct hash_ipportip4_elem *d)
{
	next->ip = d->ip;
	next->port = d->port;
}

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/* Common functions */

#define MTYPE		hash_ipportip4

#define HOST_MASK	32
#include "ip_set_hash_gen.h"


static int

hash_ipportip4_kadt(struct ip_set *set, const struct sk_buff *skb,
		    const struct xt_action_param *par,
		    enum ipset_adt adt, struct ip_set_adt_opt *opt)
{
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct hash_ipportip4_elem e = { .ip = 0 };
	struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);

	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);
	ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2);
	return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}

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4.03%
1
14.29%
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149
100.00%
7
100.00%


static int

hash_ipportip4_uadt(struct ip_set *set, struct nlattr *tb[],
		    enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
	const struct hash_ipportip *h = set->data;
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct hash_ipportip4_elem e = { .ip = 0 };
	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
	u32 ip, ip_to = 0, p = 0, port, port_to;
	bool with_ports = false;
	int ret;

	if (tb[IPSET_ATTR_LINENO])
		*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);

	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)))
		return -IPSET_ERR_PROTOCOL;

	ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
	if (ret)
		return ret;

	ret = ip_set_get_extensions(set, tb, &ext);
	if (ret)
		return ret;

	ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &e.ip2);
	if (ret)
		return ret;

	e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);

	if (tb[IPSET_ATTR_PROTO]) {
		e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
		with_ports = ip_set_proto_with_ports(e.proto);

		if (e.proto == 0)
			return -IPSET_ERR_INVALID_PROTO;
	} else {
		return -IPSET_ERR_MISSING_PROTO;
	}

	if (!(with_ports || e.proto == IPPROTO_ICMP))
		e.port = 0;

	if (adt == IPSET_TEST ||
	    !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
	      tb[IPSET_ATTR_PORT_TO])) {
		ret = adtfn(set, &e, &ext, &ext, flags);
		return ip_set_eexist(ret, flags) ? 0 : ret;
	}

	ip_to = ip = ntohl(e.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 || cidr > HOST_MASK)
			return -IPSET_ERR_INVALID_CIDR;
		ip_set_mask_from_to(ip, ip_to, cidr);
	}

	port_to = port = ntohs(e.port);
	if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
		port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
		if (port > port_to)
			swap(port, port_to);
	}

	if (retried)
		ip = ntohl(h->next.ip);
	for (; !before(ip_to, ip); ip++) {
		p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
						       : port;
		for (; p <= port_to; p++) {
			e.ip = htonl(ip);
			e.port = htons(p);
			ret = adtfn(set, &e, &ext, &ext, flags);

			if (ret && !ip_set_eexist(ret, flags))
				return ret;

			ret = 0;
		}
	}
	return ret;
}

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3
18.75%
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mark d. rustad
6
0.97%
1
6.25%
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618
100.00%
16
100.00%

/* IPv6 variant */


struct hash_ipportip6_elem {
	
union nf_inet_addr ip;
	
union nf_inet_addr ip2;
	
__be16 port;
	
u8 proto;
	
u8 padding;
};

/* Common functions */


static inline bool

hash_ipportip6_data_equal(const struct hash_ipportip6_elem *ip1,
			  const struct hash_ipportip6_elem *ip2,
			  u32 *multi)
{
	return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
	       ipv6_addr_equal(&ip1->ip2.in6, &ip2->ip2.in6) &&
	       ip1->port == ip2->port &&
	       ip1->proto == ip2->proto;
}

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2.70%
1
33.33%
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74
100.00%
3
100.00%


static bool

hash_ipportip6_data_list(struct sk_buff *skb,
			 const struct hash_ipportip6_elem *data)
{
	if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
	    nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) ||
	    nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
	    nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
		goto nla_put_failure;
	return false;

nla_put_failure:
	return true;
}

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33.33%
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sergey popovich
2
2.50%
1
33.33%
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80
100.00%
3
100.00%


static inline void

hash_ipportip6_data_next(struct hash_ipportip4_elem *next,
			 const struct hash_ipportip6_elem *d)
{
	next->port = d->port;
}

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#undef MTYPE

#undef HOST_MASK


#define MTYPE		hash_ipportip6

#define HOST_MASK	128

#define IP_SET_EMIT_CREATE
#include "ip_set_hash_gen.h"


static int

hash_ipportip6_kadt(struct ip_set *set, const struct sk_buff *skb,
		    const struct xt_action_param *par,
		    enum ipset_adt adt, struct ip_set_adt_opt *opt)
{
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct hash_ipportip6_elem e = { .ip = { .all = { 0 } } };
	struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);

	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);
	ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip2.in6);
	return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}

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static int

hash_ipportip6_uadt(struct ip_set *set, struct nlattr *tb[],
		    enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
	const struct hash_ipportip *h = set->data;
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct hash_ipportip6_elem e = {  .ip = { .all = { 0 } } };
	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
	u32 port, port_to;
	bool with_ports = false;
	int ret;

	if (tb[IPSET_ATTR_LINENO])
		*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);

	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)))
		return -IPSET_ERR_PROTOCOL;
	if (unlikely(tb[IPSET_ATTR_IP_TO]))
		return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
	if (unlikely(tb[IPSET_ATTR_CIDR])) {
		u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);

		if (cidr != HOST_MASK)
			return -IPSET_ERR_INVALID_CIDR;
	}

	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
	if (ret)
		return ret;

	ret = ip_set_get_extensions(set, tb, &ext);
	if (ret)
		return ret;

	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip2);
	if (ret)
		return ret;

	e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);

	if (tb[IPSET_ATTR_PROTO]) {
		e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
		with_ports = ip_set_proto_with_ports(e.proto);

		if (e.proto == 0)
			return -IPSET_ERR_INVALID_PROTO;
	} else {
		return -IPSET_ERR_MISSING_PROTO;
	}

	if (!(with_ports || e.proto == IPPROTO_ICMPV6))
		e.port = 0;

	if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
		ret = adtfn(set, &e, &ext, &ext, flags);
		return ip_set_eexist(ret, flags) ? 0 : ret;
	}

	port = ntohs(e.port);
	port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
	if (port > port_to)
		swap(port, port_to);

	if (retried)
		port = ntohs(h->next.port);
	for (; port <= port_to; port++) {
		e.port = htons(port);
		ret = adtfn(set, &e, &ext, &ext, flags);

		if (ret && !ip_set_eexist(ret, flags))
			return ret;

		ret = 0;
	}
	return ret;
}

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3
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mark d. rustad
13
2.64%
1
8.33%
Total
493
100.00%
12
100.00%


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		= NFPROTO_UNSPEC,
	.revision_min	= IPSET_TYPE_REV_MIN,
	.revision_max	= IPSET_TYPE_REV_MAX,
	.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 },
		[IPSET_ATTR_CADT_FLAGS]	= { .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 },
		[IPSET_ATTR_BYTES]	= { .type = NLA_U64 },
		[IPSET_ATTR_PACKETS]	= { .type = NLA_U64 },
		[IPSET_ATTR_COMMENT]	= { .type = NLA_NUL_STRING,
					    .len  = IPSET_MAX_COMMENT_SIZE },
		[IPSET_ATTR_SKBMARK]	= { .type = NLA_U64 },
		[IPSET_ATTR_SKBPRIO]	= { .type = NLA_U32 },
		[IPSET_ATTR_SKBQUEUE]	= { .type = NLA_U16 },
        },
	.me		= THIS_MODULE,
};


static int __init

hash_ipportip_init(void)
{
	return ip_set_type_register(&hash_ipportip_type);
}

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static void __exit

hash_ipportip_fini(void)
{
	rcu_barrier();
	ip_set_type_unregister(&hash_ipportip_type);
}

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module_init(hash_ipportip_init);

module_exit(hash_ipportip_fini);
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jozsef kadlecsik
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21
61.76%
sergey popovich
sergey popovich
106
4.65%
6
17.65%
mark d. rustad
mark d. rustad
38
1.67%
1
2.94%
anton danilov
anton danilov
36
1.58%
1
2.94%
david s. miller
david s. miller
30
1.32%
1
2.94%
oliver smith
oliver smith
12
0.53%
1
2.94%
hideaki yoshifuji
hideaki yoshifuji
2
0.09%
1
2.94%
josh hunt
josh hunt
1
0.04%
1
2.94%
jan engelhardt
jan engelhardt
1
0.04%
1
2.94%
Total
2278
100.00%
34
100.00%
  
Directory: net/netfilter/ipset

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