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-rw-r--r--include/linux/netfilter/ipset/ip_set.h452
-rw-r--r--include/linux/netfilter/ipset/ip_set_getport.h11
-rw-r--r--include/linux/netfilter/ipset/pfxlen.h35
-rw-r--r--net/netfilter/Kconfig2
-rw-r--r--net/netfilter/Makefile3
-rw-r--r--net/netfilter/ipset/Kconfig26
-rw-r--r--net/netfilter/ipset/Makefile8
-rw-r--r--net/netfilter/ipset/ip_set_core.c1662
-rw-r--r--net/netfilter/ipset/ip_set_getport.c136
-rw-r--r--net/netfilter/ipset/pfxlen.c291
10 files changed, 2626 insertions, 0 deletions
diff --git a/include/linux/netfilter/ipset/ip_set.h b/include/linux/netfilter/ipset/ip_set.h
new file mode 100644
index 000000000000..ec333d83f3b4
--- /dev/null
+++ b/include/linux/netfilter/ipset/ip_set.h
@@ -0,0 +1,452 @@
+#ifndef _IP_SET_H
+#define _IP_SET_H
+
+/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
+ * Patrick Schaaf <bof@bof.de>
+ * Martin Josefsson <gandalf@wlug.westbo.se>
+ * 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.
+ */
+
+/* The protocol version */
+#define IPSET_PROTOCOL 6
+
+/* The max length of strings including NUL: set and type identifiers */
+#define IPSET_MAXNAMELEN 32
+
+/* Message types and commands */
+enum ipset_cmd {
+ IPSET_CMD_NONE,
+ IPSET_CMD_PROTOCOL, /* 1: Return protocol version */
+ IPSET_CMD_CREATE, /* 2: Create a new (empty) set */
+ IPSET_CMD_DESTROY, /* 3: Destroy a (empty) set */
+ IPSET_CMD_FLUSH, /* 4: Remove all elements from a set */
+ IPSET_CMD_RENAME, /* 5: Rename a set */
+ IPSET_CMD_SWAP, /* 6: Swap two sets */
+ IPSET_CMD_LIST, /* 7: List sets */
+ IPSET_CMD_SAVE, /* 8: Save sets */
+ IPSET_CMD_ADD, /* 9: Add an element to a set */
+ IPSET_CMD_DEL, /* 10: Delete an element from a set */
+ IPSET_CMD_TEST, /* 11: Test an element in a set */
+ IPSET_CMD_HEADER, /* 12: Get set header data only */
+ IPSET_CMD_TYPE, /* 13: Get set type */
+ IPSET_MSG_MAX, /* Netlink message commands */
+
+ /* Commands in userspace: */
+ IPSET_CMD_RESTORE = IPSET_MSG_MAX, /* 14: Enter restore mode */
+ IPSET_CMD_HELP, /* 15: Get help */
+ IPSET_CMD_VERSION, /* 16: Get program version */
+ IPSET_CMD_QUIT, /* 17: Quit from interactive mode */
+
+ IPSET_CMD_MAX,
+
+ IPSET_CMD_COMMIT = IPSET_CMD_MAX, /* 18: Commit buffered commands */
+};
+
+/* Attributes at command level */
+enum {
+ IPSET_ATTR_UNSPEC,
+ IPSET_ATTR_PROTOCOL, /* 1: Protocol version */
+ IPSET_ATTR_SETNAME, /* 2: Name of the set */
+ IPSET_ATTR_TYPENAME, /* 3: Typename */
+ IPSET_ATTR_SETNAME2 = IPSET_ATTR_TYPENAME, /* Setname at rename/swap */
+ IPSET_ATTR_REVISION, /* 4: Settype revision */
+ IPSET_ATTR_FAMILY, /* 5: Settype family */
+ IPSET_ATTR_FLAGS, /* 6: Flags at command level */
+ IPSET_ATTR_DATA, /* 7: Nested attributes */
+ IPSET_ATTR_ADT, /* 8: Multiple data containers */
+ IPSET_ATTR_LINENO, /* 9: Restore lineno */
+ IPSET_ATTR_PROTOCOL_MIN, /* 10: Minimal supported version number */
+ IPSET_ATTR_REVISION_MIN = IPSET_ATTR_PROTOCOL_MIN, /* type rev min */
+ __IPSET_ATTR_CMD_MAX,
+};
+#define IPSET_ATTR_CMD_MAX (__IPSET_ATTR_CMD_MAX - 1)
+
+/* CADT specific attributes */
+enum {
+ IPSET_ATTR_IP = IPSET_ATTR_UNSPEC + 1,
+ IPSET_ATTR_IP_FROM = IPSET_ATTR_IP,
+ IPSET_ATTR_IP_TO, /* 2 */
+ IPSET_ATTR_CIDR, /* 3 */
+ IPSET_ATTR_PORT, /* 4 */
+ IPSET_ATTR_PORT_FROM = IPSET_ATTR_PORT,
+ IPSET_ATTR_PORT_TO, /* 5 */
+ IPSET_ATTR_TIMEOUT, /* 6 */
+ IPSET_ATTR_PROTO, /* 7 */
+ IPSET_ATTR_CADT_FLAGS, /* 8 */
+ IPSET_ATTR_CADT_LINENO = IPSET_ATTR_LINENO, /* 9 */
+ /* Reserve empty slots */
+ IPSET_ATTR_CADT_MAX = 16,
+ /* Create-only specific attributes */
+ IPSET_ATTR_GC,
+ IPSET_ATTR_HASHSIZE,
+ IPSET_ATTR_MAXELEM,
+ IPSET_ATTR_NETMASK,
+ IPSET_ATTR_PROBES,
+ IPSET_ATTR_RESIZE,
+ IPSET_ATTR_SIZE,
+ /* Kernel-only */
+ IPSET_ATTR_ELEMENTS,
+ IPSET_ATTR_REFERENCES,
+ IPSET_ATTR_MEMSIZE,
+
+ __IPSET_ATTR_CREATE_MAX,
+};
+#define IPSET_ATTR_CREATE_MAX (__IPSET_ATTR_CREATE_MAX - 1)
+
+/* ADT specific attributes */
+enum {
+ IPSET_ATTR_ETHER = IPSET_ATTR_CADT_MAX + 1,
+ IPSET_ATTR_NAME,
+ IPSET_ATTR_NAMEREF,
+ IPSET_ATTR_IP2,
+ IPSET_ATTR_CIDR2,
+ __IPSET_ATTR_ADT_MAX,
+};
+#define IPSET_ATTR_ADT_MAX (__IPSET_ATTR_ADT_MAX - 1)
+
+/* IP specific attributes */
+enum {
+ IPSET_ATTR_IPADDR_IPV4 = IPSET_ATTR_UNSPEC + 1,
+ IPSET_ATTR_IPADDR_IPV6,
+ __IPSET_ATTR_IPADDR_MAX,
+};
+#define IPSET_ATTR_IPADDR_MAX (__IPSET_ATTR_IPADDR_MAX - 1)
+
+/* Error codes */
+enum ipset_errno {
+ IPSET_ERR_PRIVATE = 4096,
+ IPSET_ERR_PROTOCOL,
+ IPSET_ERR_FIND_TYPE,
+ IPSET_ERR_MAX_SETS,
+ IPSET_ERR_BUSY,
+ IPSET_ERR_EXIST_SETNAME2,
+ IPSET_ERR_TYPE_MISMATCH,
+ IPSET_ERR_EXIST,
+ IPSET_ERR_INVALID_CIDR,
+ IPSET_ERR_INVALID_NETMASK,
+ IPSET_ERR_INVALID_FAMILY,
+ IPSET_ERR_TIMEOUT,
+ IPSET_ERR_REFERENCED,
+ IPSET_ERR_IPADDR_IPV4,
+ IPSET_ERR_IPADDR_IPV6,
+
+ /* Type specific error codes */
+ IPSET_ERR_TYPE_SPECIFIC = 4352,
+};
+
+/* Flags at command level */
+enum ipset_cmd_flags {
+ IPSET_FLAG_BIT_EXIST = 0,
+ IPSET_FLAG_EXIST = (1 << IPSET_FLAG_BIT_EXIST),
+};
+
+/* Flags at CADT attribute level */
+enum ipset_cadt_flags {
+ IPSET_FLAG_BIT_BEFORE = 0,
+ IPSET_FLAG_BEFORE = (1 << IPSET_FLAG_BIT_BEFORE),
+};
+
+/* Commands with settype-specific attributes */
+enum ipset_adt {
+ IPSET_ADD,
+ IPSET_DEL,
+ IPSET_TEST,
+ IPSET_ADT_MAX,
+ IPSET_CREATE = IPSET_ADT_MAX,
+ IPSET_CADT_MAX,
+};
+
+#ifdef __KERNEL__
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/netlink.h>
+#include <linux/netfilter.h>
+#include <linux/vmalloc.h>
+#include <net/netlink.h>
+
+/* Sets are identified by an index in kernel space. Tweak with ip_set_id_t
+ * and IPSET_INVALID_ID if you want to increase the max number of sets.
+ */
+typedef u16 ip_set_id_t;
+
+#define IPSET_INVALID_ID 65535
+
+enum ip_set_dim {
+ IPSET_DIM_ZERO = 0,
+ IPSET_DIM_ONE,
+ IPSET_DIM_TWO,
+ IPSET_DIM_THREE,
+ /* Max dimension in elements.
+ * If changed, new revision of iptables match/target is required.
+ */
+ IPSET_DIM_MAX = 6,
+};
+
+/* Option flags for kernel operations */
+enum ip_set_kopt {
+ IPSET_INV_MATCH = (1 << IPSET_DIM_ZERO),
+ IPSET_DIM_ONE_SRC = (1 << IPSET_DIM_ONE),
+ IPSET_DIM_TWO_SRC = (1 << IPSET_DIM_TWO),
+ IPSET_DIM_THREE_SRC = (1 << IPSET_DIM_THREE),
+};
+
+/* Set features */
+enum ip_set_feature {
+ IPSET_TYPE_IP_FLAG = 0,
+ IPSET_TYPE_IP = (1 << IPSET_TYPE_IP_FLAG),
+ IPSET_TYPE_PORT_FLAG = 1,
+ IPSET_TYPE_PORT = (1 << IPSET_TYPE_PORT_FLAG),
+ IPSET_TYPE_MAC_FLAG = 2,
+ IPSET_TYPE_MAC = (1 << IPSET_TYPE_MAC_FLAG),
+ IPSET_TYPE_IP2_FLAG = 3,
+ IPSET_TYPE_IP2 = (1 << IPSET_TYPE_IP2_FLAG),
+ IPSET_TYPE_NAME_FLAG = 4,
+ IPSET_TYPE_NAME = (1 << IPSET_TYPE_NAME_FLAG),
+ /* Strictly speaking not a feature, but a flag for dumping:
+ * this settype must be dumped last */
+ IPSET_DUMP_LAST_FLAG = 7,
+ IPSET_DUMP_LAST = (1 << IPSET_DUMP_LAST_FLAG),
+};
+
+struct ip_set;
+
+typedef int (*ipset_adtfn)(struct ip_set *set, void *value, u32 timeout);
+
+/* Set type, variant-specific part */
+struct ip_set_type_variant {
+ /* Kernelspace: test/add/del entries
+ * returns negative error code,
+ * zero for no match/success to add/delete
+ * positive for matching element */
+ int (*kadt)(struct ip_set *set, const struct sk_buff * skb,
+ enum ipset_adt adt, u8 pf, u8 dim, u8 flags);
+
+ /* Userspace: test/add/del entries
+ * returns negative error code,
+ * zero for no match/success to add/delete
+ * positive for matching element */
+ int (*uadt)(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags);
+
+ /* Low level add/del/test functions */
+ ipset_adtfn adt[IPSET_ADT_MAX];
+
+ /* When adding entries and set is full, try to resize the set */
+ int (*resize)(struct ip_set *set, bool retried);
+ /* Destroy the set */
+ void (*destroy)(struct ip_set *set);
+ /* Flush the elements */
+ void (*flush)(struct ip_set *set);
+ /* Expire entries before listing */
+ void (*expire)(struct ip_set *set);
+ /* List set header data */
+ int (*head)(struct ip_set *set, struct sk_buff *skb);
+ /* List elements */
+ int (*list)(const struct ip_set *set, struct sk_buff *skb,
+ struct netlink_callback *cb);
+
+ /* Return true if "b" set is the same as "a"
+ * according to the create set parameters */
+ bool (*same_set)(const struct ip_set *a, const struct ip_set *b);
+};
+
+/* The core set type structure */
+struct ip_set_type {
+ struct list_head list;
+
+ /* Typename */
+ char name[IPSET_MAXNAMELEN];
+ /* Protocol version */
+ u8 protocol;
+ /* Set features to control swapping */
+ u8 features;
+ /* Set type dimension */
+ u8 dimension;
+ /* Supported family: may be AF_UNSPEC for both AF_INET/AF_INET6 */
+ u8 family;
+ /* Type revision */
+ u8 revision;
+
+ /* Create set */
+ int (*create)(struct ip_set *set, struct nlattr *tb[], u32 flags);
+
+ /* Attribute policies */
+ const struct nla_policy create_policy[IPSET_ATTR_CREATE_MAX + 1];
+ const struct nla_policy adt_policy[IPSET_ATTR_ADT_MAX + 1];
+
+ /* Set this to THIS_MODULE if you are a module, otherwise NULL */
+ struct module *me;
+};
+
+/* register and unregister set type */
+extern int ip_set_type_register(struct ip_set_type *set_type);
+extern void ip_set_type_unregister(struct ip_set_type *set_type);
+
+/* A generic IP set */
+struct ip_set {
+ /* The name of the set */
+ char name[IPSET_MAXNAMELEN];
+ /* Lock protecting the set data */
+ rwlock_t lock;
+ /* References to the set */
+ atomic_t ref;
+ /* The core set type */
+ struct ip_set_type *type;
+ /* The type variant doing the real job */
+ const struct ip_set_type_variant *variant;
+ /* The actual INET family of the set */
+ u8 family;
+ /* The type specific data */
+ void *data;
+};
+
+/* register and unregister set references */
+extern ip_set_id_t ip_set_get_byname(const char *name, struct ip_set **set);
+extern void ip_set_put_byindex(ip_set_id_t index);
+extern const char * ip_set_name_byindex(ip_set_id_t index);
+extern ip_set_id_t ip_set_nfnl_get(const char *name);
+extern ip_set_id_t ip_set_nfnl_get_byindex(ip_set_id_t index);
+extern void ip_set_nfnl_put(ip_set_id_t index);
+
+/* API for iptables set match, and SET target */
+extern int ip_set_add(ip_set_id_t id, const struct sk_buff *skb,
+ u8 family, u8 dim, u8 flags);
+extern int ip_set_del(ip_set_id_t id, const struct sk_buff *skb,
+ u8 family, u8 dim, u8 flags);
+extern int ip_set_test(ip_set_id_t id, const struct sk_buff *skb,
+ u8 family, u8 dim, u8 flags);
+
+/* Utility functions */
+extern void * ip_set_alloc(size_t size);
+extern void ip_set_free(void *members);
+extern int ip_set_get_ipaddr4(struct nlattr *nla, __be32 *ipaddr);
+extern int ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr);
+
+static inline int
+ip_set_get_hostipaddr4(struct nlattr *nla, u32 *ipaddr)
+{
+ __be32 ip;
+ int ret = ip_set_get_ipaddr4(nla, &ip);
+
+ if (ret)
+ return ret;
+ *ipaddr = ntohl(ip);
+ return 0;
+}
+
+/* Ignore IPSET_ERR_EXIST errors if asked to do so? */
+static inline bool
+ip_set_eexist(int ret, u32 flags)
+{
+ return ret == -IPSET_ERR_EXIST && (flags & IPSET_FLAG_EXIST);
+}
+
+/* Check the NLA_F_NET_BYTEORDER flag */
+static inline bool
+ip_set_attr_netorder(struct nlattr *tb[], int type)
+{
+ return tb[type] && (tb[type]->nla_type & NLA_F_NET_BYTEORDER);
+}
+
+static inline bool
+ip_set_optattr_netorder(struct nlattr *tb[], int type)
+{
+ return !tb[type] || (tb[type]->nla_type & NLA_F_NET_BYTEORDER);
+}
+
+/* Useful converters */
+static inline u32
+ip_set_get_h32(const struct nlattr *attr)
+{
+ return ntohl(nla_get_be32(attr));
+}
+
+static inline u16
+ip_set_get_h16(const struct nlattr *attr)
+{
+ return ntohs(nla_get_be16(attr));
+}
+
+#define ipset_nest_start(skb, attr) nla_nest_start(skb, attr | NLA_F_NESTED)
+#define ipset_nest_end(skb, start) nla_nest_end(skb, start)
+
+#define NLA_PUT_IPADDR4(skb, type, ipaddr) \
+do { \
+ struct nlattr *__nested = ipset_nest_start(skb, type); \
+ \
+ if (!__nested) \
+ goto nla_put_failure; \
+ NLA_PUT_NET32(skb, IPSET_ATTR_IPADDR_IPV4, ipaddr); \
+ ipset_nest_end(skb, __nested); \
+} while (0)
+
+#define NLA_PUT_IPADDR6(skb, type, ipaddrptr) \
+do { \
+ struct nlattr *__nested = ipset_nest_start(skb, type); \
+ \
+ if (!__nested) \
+ goto nla_put_failure; \
+ NLA_PUT(skb, IPSET_ATTR_IPADDR_IPV6, \
+ sizeof(struct in6_addr), ipaddrptr); \
+ ipset_nest_end(skb, __nested); \
+} while (0)
+
+/* Get address from skbuff */
+static inline __be32
+ip4addr(const struct sk_buff *skb, bool src)
+{
+ return src ? ip_hdr(skb)->saddr : ip_hdr(skb)->daddr;
+}
+
+static inline void
+ip4addrptr(const struct sk_buff *skb, bool src, __be32 *addr)
+{
+ *addr = src ? ip_hdr(skb)->saddr : ip_hdr(skb)->daddr;
+}
+
+static inline void
+ip6addrptr(const struct sk_buff *skb, bool src, struct in6_addr *addr)
+{
+ memcpy(addr, src ? &ipv6_hdr(skb)->saddr : &ipv6_hdr(skb)->daddr,
+ sizeof(*addr));
+}
+
+/* Calculate the bytes required to store the inclusive range of a-b */
+static inline int
+bitmap_bytes(u32 a, u32 b)
+{
+ return 4 * ((((b - a + 8) / 8) + 3) / 4);
+}
+
+/* Interface to iptables/ip6tables */
+
+#define SO_IP_SET 83
+
+union ip_set_name_index {
+ char name[IPSET_MAXNAMELEN];
+ ip_set_id_t index;
+};
+
+#define IP_SET_OP_GET_BYNAME 0x00000006 /* Get set index by name */
+struct ip_set_req_get_set {
+ unsigned op;
+ unsigned version;
+ union ip_set_name_index set;
+};
+
+#define IP_SET_OP_GET_BYINDEX 0x00000007 /* Get set name by index */
+/* Uses ip_set_req_get_set */
+
+#define IP_SET_OP_VERSION 0x00000100 /* Ask kernel version */
+struct ip_set_req_version {
+ unsigned op;
+ unsigned version;
+};
+
+#endif /* __KERNEL__ */
+
+#endif /*_IP_SET_H */
diff --git a/include/linux/netfilter/ipset/ip_set_getport.h b/include/linux/netfilter/ipset/ip_set_getport.h
new file mode 100644
index 000000000000..694c433298b8
--- /dev/null
+++ b/include/linux/netfilter/ipset/ip_set_getport.h
@@ -0,0 +1,11 @@
+#ifndef _IP_SET_GETPORT_H
+#define _IP_SET_GETPORT_H
+
+extern bool ip_set_get_ip4_port(const struct sk_buff *skb, bool src,
+ __be16 *port, u8 *proto);
+extern bool ip_set_get_ip6_port(const struct sk_buff *skb, bool src,
+ __be16 *port, u8 *proto);
+extern bool ip_set_get_ip_port(const struct sk_buff *skb, u8 pf, bool src,
+ __be16 *port);
+
+#endif /*_IP_SET_GETPORT_H*/
diff --git a/include/linux/netfilter/ipset/pfxlen.h b/include/linux/netfilter/ipset/pfxlen.h
new file mode 100644
index 000000000000..0e1fb50da562
--- /dev/null
+++ b/include/linux/netfilter/ipset/pfxlen.h
@@ -0,0 +1,35 @@
+#ifndef _PFXLEN_H
+#define _PFXLEN_H
+
+#include <asm/byteorder.h>
+#include <linux/netfilter.h>
+
+/* Prefixlen maps, by Jan Engelhardt */
+extern const union nf_inet_addr ip_set_netmask_map[];
+extern const union nf_inet_addr ip_set_hostmask_map[];
+
+static inline __be32
+ip_set_netmask(u8 pfxlen)
+{
+ return ip_set_netmask_map[pfxlen].ip;
+}
+
+static inline const __be32 *
+ip_set_netmask6(u8 pfxlen)
+{
+ return &ip_set_netmask_map[pfxlen].ip6[0];
+}
+
+static inline u32
+ip_set_hostmask(u8 pfxlen)
+{
+ return (__force u32) ip_set_hostmask_map[pfxlen].ip;
+}
+
+static inline const __be32 *
+ip_set_hostmask6(u8 pfxlen)
+{
+ return &ip_set_hostmask_map[pfxlen].ip6[0];
+}
+
+#endif /*_PFXLEN_H */
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index faf7412ea453..351abf8ace13 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -1052,4 +1052,6 @@ endif # NETFILTER_XTABLES
endmenu
+source "net/netfilter/ipset/Kconfig"
+
source "net/netfilter/ipvs/Kconfig"
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 9ae6878a85b1..510b586ccb7f 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -105,5 +105,8 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_TCPMSS) += xt_tcpmss.o
obj-$(CONFIG_NETFILTER_XT_MATCH_TIME) += xt_time.o
obj-$(CONFIG_NETFILTER_XT_MATCH_U32) += xt_u32.o
+# ipset
+obj-$(CONFIG_IP_SET) += ipset/
+
# IPVS
obj-$(CONFIG_IP_VS) += ipvs/
diff --git a/net/netfilter/ipset/Kconfig b/net/netfilter/ipset/Kconfig
new file mode 100644
index 000000000000..5ade156dd470
--- /dev/null
+++ b/net/netfilter/ipset/Kconfig
@@ -0,0 +1,26 @@
+menuconfig IP_SET
+ tristate "IP set support"
+ depends on INET && NETFILTER
+ help
+ This option adds IP set support to the kernel.
+ In order to define and use the sets, you need the userspace utility
+ ipset(8). You can use the sets in netfilter via the "set" match
+ and "SET" target.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
+if IP_SET
+
+config IP_SET_MAX
+ int "Maximum number of IP sets"
+ default 256
+ range 2 65534
+ depends on IP_SET
+ help
+ You can define here default value of the maximum number
+ of IP sets for the kernel.
+
+ The value can be overriden by the 'max_sets' module
+ parameter of the 'ip_set' module.
+
+endif # IP_SET
diff --git a/net/netfilter/ipset/Makefile b/net/netfilter/ipset/Makefile
new file mode 100644
index 000000000000..910cd425c067
--- /dev/null
+++ b/net/netfilter/ipset/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the ipset modules
+#
+
+ip_set-y := ip_set_core.o ip_set_getport.o pfxlen.o
+
+# ipset core
+obj-$(CONFIG_IP_SET) += ip_set.o
diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
new file mode 100644
index 000000000000..8a736247e85f
--- /dev/null
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -0,0 +1,1662 @@
+/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
+ * Patrick Schaaf <bof@bof.de>
+ * 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 for IP set management */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/netlink.h>
+#include <linux/rculist.h>
+#include <linux/version.h>
+#include <net/netlink.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/ipset/ip_set.h>
+
+static LIST_HEAD(ip_set_type_list); /* all registered set types */
+static DEFINE_MUTEX(ip_set_type_mutex); /* protects ip_set_type_list */
+
+static struct ip_set **ip_set_list; /* all individual sets */
+static ip_set_id_t ip_set_max = CONFIG_IP_SET_MAX; /* max number of sets */
+
+#define STREQ(a, b) (strncmp(a, b, IPSET_MAXNAMELEN) == 0)
+
+static unsigned int max_sets;
+
+module_param(max_sets, int, 0600);
+MODULE_PARM_DESC(max_sets, "maximal number of sets");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
+MODULE_DESCRIPTION("core IP set support");
+MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_IPSET);
+
+/*
+ * The set types are implemented in modules and registered set types
+ * can be found in ip_set_type_list. Adding/deleting types is
+ * serialized by ip_set_type_mutex.
+ */
+
+static inline void
+ip_set_type_lock(void)
+{
+ mutex_lock(&ip_set_type_mutex);
+}
+
+static inline void
+ip_set_type_unlock(void)
+{
+ mutex_unlock(&ip_set_type_mutex);
+}
+
+/* Register and deregister settype */
+
+static struct ip_set_type *
+find_set_type(const char *name, u8 family, u8 revision)
+{
+ struct ip_set_type *type;
+
+ list_for_each_entry_rcu(type, &ip_set_type_list, list)
+ if (STREQ(type->name, name) &&
+ (type->family == family || type->family == AF_UNSPEC) &&
+ type->revision == revision)
+ return type;
+ return NULL;
+}
+
+/* Unlock, try to load a set type module and lock again */
+static int
+try_to_load_type(const char *name)
+{
+ nfnl_unlock();
+ pr_debug("try to load ip_set_%s\n", name);
+ if (request_module("ip_set_%s", name) < 0) {
+ pr_warning("Can't find ip_set type %s\n", name);
+ nfnl_lock();
+ return -IPSET_ERR_FIND_TYPE;
+ }
+ nfnl_lock();
+ return -EAGAIN;
+}
+
+/* Find a set type and reference it */
+static int
+find_set_type_get(const char *name, u8 family, u8 revision,
+ struct ip_set_type **found)
+{
+ rcu_read_lock();
+ *found = find_set_type(name, family, revision);
+ if (*found) {
+ int err = !try_module_get((*found)->me);
+ rcu_read_unlock();
+ return err ? -EFAULT : 0;
+ }
+ rcu_read_unlock();
+
+ return try_to_load_type(name);
+}
+
+/* Find a given set type by name and family.
+ * If we succeeded, the supported minimal and maximum revisions are
+ * filled out.
+ */
+static int
+find_set_type_minmax(const char *name, u8 family, u8 *min, u8 *max)
+{
+ struct ip_set_type *type;
+ bool found = false;
+
+ *min = *max = 0;
+ rcu_read_lock();
+ list_for_each_entry_rcu(type, &ip_set_type_list, list)
+ if (STREQ(type->name, name) &&
+ (type->family == family || type->family == AF_UNSPEC)) {
+ found = true;
+ if (type->revision < *min)
+ *min = type->revision;
+ else if (type->revision > *max)
+ *max = type->revision;
+ }
+ rcu_read_unlock();
+ if (found)
+ return 0;
+
+ return try_to_load_type(name);
+}
+
+#define family_name(f) ((f) == AF_INET ? "inet" : \
+ (f) == AF_INET6 ? "inet6" : "any")
+
+/* Register a set type structure. The type is identified by
+ * the unique triple of name, family and revision.
+ */
+int
+ip_set_type_register(struct ip_set_type *type)
+{
+ int ret = 0;
+
+ if (type->protocol != IPSET_PROTOCOL) {
+ pr_warning("ip_set type %s, family %s, revision %u uses "
+ "wrong protocol version %u (want %u)\n",
+ type->name, family_name(type->family),
+ type->revision, type->protocol, IPSET_PROTOCOL);
+ return -EINVAL;
+ }
+
+ ip_set_type_lock();
+ if (find_set_type(type->name, type->family, type->revision)) {
+ /* Duplicate! */
+ pr_warning("ip_set type %s, family %s, revision %u "
+ "already registered!\n", type->name,
+ family_name(type->family), type->revision);
+ ret = -EINVAL;
+ goto unlock;
+ }
+ list_add_rcu(&type->list, &ip_set_type_list);
+ pr_debug("type %s, family %s, revision %u registered.\n",
+ type->name, family_name(type->family), type->revision);
+unlock:
+ ip_set_type_unlock();
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ip_set_type_register);
+
+/* Unregister a set type. There's a small race with ip_set_create */
+void
+ip_set_type_unregister(struct ip_set_type *type)
+{
+ ip_set_type_lock();
+ if (!find_set_type(type->name, type->family, type->revision)) {
+ pr_warning("ip_set type %s, family %s, revision %u "
+ "not registered\n", type->name,
+ family_name(type->family), type->revision);
+ goto unlock;
+ }
+ list_del_rcu(&type->list);
+ pr_debug("type %s, family %s, revision %u unregistered.\n",
+ type->name, family_name(type->family), type->revision);
+unlock:
+ ip_set_type_unlock();
+
+ synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(ip_set_type_unregister);
+
+/* Utility functions */
+void *
+ip_set_alloc(size_t size)
+{
+ void *members = NULL;
+
+ if (size < KMALLOC_MAX_SIZE)
+ members = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
+
+ if (members) {
+ pr_debug("%p: allocated with kmalloc\n", members);
+ return members;
+ }
+
+ members = vzalloc(size);
+ if (!members)
+ return NULL;
+ pr_debug("%p: allocated with vmalloc\n", members);
+
+ return members;
+}
+EXPORT_SYMBOL_GPL(ip_set_alloc);
+
+void
+ip_set_free(void *members)
+{
+ pr_debug("%p: free with %s\n", members,
+ is_vmalloc_addr(members) ? "vfree" : "kfree");
+ if (is_vmalloc_addr(members))
+ vfree(members);
+ else
+ kfree(members);
+}
+EXPORT_SYMBOL_GPL(ip_set_free);
+
+static inline bool
+flag_nested(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_F_NESTED;
+}
+
+static const struct nla_policy ipaddr_policy[IPSET_ATTR_IPADDR_MAX + 1] = {
+ [IPSET_ATTR_IPADDR_IPV4] = { .type = NLA_U32 },
+ [IPSET_ATTR_IPADDR_IPV6] = { .type = NLA_BINARY,
+ .len = sizeof(struct in6_addr) },
+};
+
+int
+ip_set_get_ipaddr4(struct nlattr *nla, __be32 *ipaddr)
+{
+ struct nlattr *tb[IPSET_ATTR_IPADDR_MAX+1];
+
+ if (unlikely(!flag_nested(nla)))
+ return -IPSET_ERR_PROTOCOL;
+ if (nla_parse(tb, IPSET_ATTR_IPADDR_MAX, nla_data(nla), nla_len(nla),
+ ipaddr_policy))
+ return -IPSET_ERR_PROTOCOL;
+ if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV4)))
+ return -IPSET_ERR_PROTOCOL;
+
+ *ipaddr = nla_get_be32(tb[IPSET_ATTR_IPADDR_IPV4]);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ipaddr4);
+
+int
+ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr)
+{
+ struct nlattr *tb[IPSET_ATTR_IPADDR_MAX+1];
+
+ if (unlikely(!flag_nested(nla)))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (nla_parse(tb, IPSET_ATTR_IPADDR_MAX, nla_data(nla), nla_len(nla),
+ ipaddr_policy))
+ return -IPSET_ERR_PROTOCOL;
+ if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV6)))
+ return -IPSET_ERR_PROTOCOL;
+
+ memcpy(ipaddr, nla_data(tb[IPSET_ATTR_IPADDR_IPV6]),
+ sizeof(struct in6_addr));
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ipaddr6);
+
+/*
+ * Creating/destroying/renaming/swapping affect the existence and
+ * the properties of a set. All of these can be executed from userspace
+ * only and serialized by the nfnl mutex indirectly from nfnetlink.
+ *
+ * Sets are identified by their index in ip_set_list and the index
+ * is used by the external references (set/SET netfilter modules).
+ *
+ * The set behind an index may change by swapping only, from userspace.
+ */
+
+static inline void
+__ip_set_get(ip_set_id_t index)
+{
+ atomic_inc(&ip_set_list[index]->ref);
+}
+
+static inline void
+__ip_set_put(ip_set_id_t index)
+{
+ atomic_dec(&ip_set_list[index]->ref);
+}
+
+/*
+ * Add, del and test set entries from kernel.
+ *
+ * The set behind the index must exist and must be referenced
+ * so it can't be destroyed (or changed) under our foot.
+ */
+
+int
+ip_set_test(ip_set_id_t index, const struct sk_buff *skb,
+ u8 family, u8 dim, u8 flags)
+{
+ struct ip_set *set = ip_set_list[index];
+ int ret = 0;
+
+ BUG_ON(set == NULL || atomic_read(&set->ref) == 0);
+ pr_debug("set %s, index %u\n", set->name, index);
+
+ if (dim < set->type->dimension ||
+ !(family == set->family || set->family == AF_UNSPEC))
+ return 0;
+
+ read_lock_bh(&set->lock);
+ ret = set->variant->kadt(set, skb, IPSET_TEST, family, dim, flags);
+ read_unlock_bh(&set->lock);
+
+ if (ret == -EAGAIN) {
+ /* Type requests element to be completed */
+ pr_debug("element must be competed, ADD is triggered\n");
+ write_lock_bh(&set->lock);
+ set->variant->kadt(set, skb, IPSET_ADD, family, dim, flags);
+ write_unlock_bh(&set->lock);
+ ret = 1;
+ }
+
+ /* Convert error codes to nomatch */
+ return (ret < 0 ? 0 : ret);
+}
+EXPORT_SYMBOL_GPL(ip_set_test);
+
+int
+ip_set_add(ip_set_id_t index, const struct sk_buff *skb,
+ u8 family, u8 dim, u8 flags)
+{
+ struct ip_set *set = ip_set_list[index];
+ int ret;
+
+ BUG_ON(set == NULL || atomic_read(&set->ref) == 0);
+ pr_debug("set %s, index %u\n", set->name, index);
+
+ if (dim < set->type->dimension ||
+ !(family == set->family || set->family == AF_UNSPEC))
+ return 0;
+
+ write_lock_bh(&set->lock);
+ ret = set->variant->kadt(set, skb, IPSET_ADD, family, dim, flags);
+ write_unlock_bh(&set->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ip_set_add);
+
+int
+ip_set_del(ip_set_id_t index, const struct sk_buff *skb,
+ u8 family, u8 dim, u8 flags)
+{
+ struct ip_set *set = ip_set_list[index];
+ int ret = 0;
+
+ BUG_ON(set == NULL || atomic_read(&set->ref) == 0);
+ pr_debug("set %s, index %u\n", set->name, index);
+
+ if (dim < set->type->dimension ||
+ !(family == set->family || set->family == AF_UNSPEC))
+ return 0;
+
+ write_lock_bh(&set->lock);
+ ret = set->variant->kadt(set, skb, IPSET_DEL, family, dim, flags);
+ write_unlock_bh(&set->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ip_set_del);
+
+/*
+ * Find set by name, reference it once. The reference makes sure the
+ * thing pointed to, does not go away under our feet.
+ *
+ * The nfnl mutex must already be activated.
+ */
+ip_set_id_t
+ip_set_get_byname(const char *name, struct ip_set **set)
+{
+ ip_set_id_t i, index = IPSET_INVALID_ID;
+ struct ip_set *s;
+
+ for (i = 0; i < ip_set_max; i++) {
+ s = ip_set_list[i];
+ if (s != NULL && STREQ(s->name, name)) {
+ __ip_set_get(i);
+ index = i;
+ *set = s;
+ }
+ }
+
+ return index;
+}
+EXPORT_SYMBOL_GPL(ip_set_get_byname);
+
+/*
+ * If the given set pointer points to a valid set, decrement
+ * reference count by 1. The caller shall not assume the index
+ * to be valid, after calling this function.
+ *
+ * The nfnl mutex must already be activated.
+ */
+void
+ip_set_put_byindex(ip_set_id_t index)
+{
+ if (ip_set_list[index] != NULL) {
+ BUG_ON(atomic_read(&ip_set_list[index]->ref) == 0);
+ __ip_set_put(index);
+ }
+}
+EXPORT_SYMBOL_GPL(ip_set_put_byindex);
+
+/*
+ * Get the name of a set behind a set index.
+ * We assume the set is referenced, so it does exist and
+ * can't be destroyed. The set cannot be renamed due to
+ * the referencing either.
+ *
+ * The nfnl mutex must already be activated.
+ */
+const char *
+ip_set_name_byindex(ip_set_id_t index)
+{
+ const struct ip_set *set = ip_set_list[index];
+
+ BUG_ON(set == NULL);
+ BUG_ON(atomic_read(&set->ref) == 0);
+
+ /* Referenced, so it's safe */
+ return set->name;
+}
+EXPORT_SYMBOL_GPL(ip_set_name_byindex);
+
+/*
+ * Routines to call by external subsystems, which do not
+ * call nfnl_lock for us.
+ */
+
+/*
+ * Find set by name, reference it once. The reference makes sure the
+ * thing pointed to, does not go away under our feet.
+ *
+ * The nfnl mutex is used in the function.
+ */
+ip_set_id_t
+ip_set_nfnl_get(const char *name)
+{
+ struct ip_set *s;
+ ip_set_id_t index;
+
+ nfnl_lock();
+ index = ip_set_get_byname(name, &s);
+ nfnl_unlock();
+
+ return index;
+}
+EXPORT_SYMBOL_GPL(ip_set_nfnl_get);
+
+/*
+ * Find set by index, reference it once. The reference makes sure the
+ * thing pointed to, does not go away under our feet.
+ *
+ * The nfnl mutex is used in the function.
+ */
+ip_set_id_t
+ip_set_nfnl_get_byindex(ip_set_id_t index)
+{
+ if (index > ip_set_max)
+ return IPSET_INVALID_ID;
+
+ nfnl_lock();
+ if (ip_set_list[index])
+ __ip_set_get(index);
+ else
+ index = IPSET_INVALID_ID;
+ nfnl_unlock();
+
+ return index;
+}
+EXPORT_SYMBOL_GPL(ip_set_nfnl_get_byindex);
+
+/*
+ * If the given set pointer points to a valid set, decrement
+ * reference count by 1. The caller shall not assume the index
+ * to be valid, after calling this function.
+ *
+ * The nfnl mutex is used in the function.
+ */
+void
+ip_set_nfnl_put(ip_set_id_t index)
+{
+ nfnl_lock();
+ if (ip_set_list[index] != NULL) {
+ BUG_ON(atomic_read(&ip_set_list[index]->ref) == 0);
+ __ip_set_put(index);
+ }
+ nfnl_unlock();
+}
+EXPORT_SYMBOL_GPL(ip_set_nfnl_put);
+
+/*
+ * Communication protocol with userspace over netlink.
+ *
+ * We already locked by nfnl_lock.
+ */
+
+static inline bool
+protocol_failed(const struct nlattr * const tb[])
+{
+ return !tb[IPSET_ATTR_PROTOCOL] ||
+ nla_get_u8(tb[IPSET_ATTR_PROTOCOL]) != IPSET_PROTOCOL;
+}
+
+static inline u32
+flag_exist(const struct nlmsghdr *nlh)
+{
+ return nlh->nlmsg_flags & NLM_F_EXCL ? 0 : IPSET_FLAG_EXIST;
+}
+
+static struct nlmsghdr *
+start_msg(struct sk_buff *skb, u32 pid, u32 seq, unsigned int flags,
+ enum ipset_cmd cmd)
+{
+ struct nlmsghdr *nlh;
+ struct nfgenmsg *nfmsg;
+
+ nlh = nlmsg_put(skb, pid, seq, cmd | (NFNL_SUBSYS_IPSET << 8),
+ sizeof(*nfmsg), flags);
+ if (nlh == NULL)
+ return NULL;
+
+ nfmsg = nlmsg_data(nlh);
+ nfmsg->nfgen_family = AF_INET;
+ nfmsg->version = NFNETLINK_V0;
+ nfmsg->res_id = 0;
+
+ return nlh;
+}
+
+/* Create a set */
+
+static const struct nla_policy ip_set_create_policy[IPSET_ATTR_CMD_MAX + 1] = {
+ [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
+ [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
+ .len = IPSET_MAXNAMELEN - 1 },
+ [IPSET_ATTR_TYPENAME] = { .type = NLA_NUL_STRING,
+ .len = IPSET_MAXNAMELEN - 1},
+ [IPSET_ATTR_REVISION] = { .type = NLA_U8 },
+ [IPSET_ATTR_FAMILY] = { .type = NLA_U8 },
+ [IPSET_ATTR_DATA] = { .type = NLA_NESTED },
+};
+
+static ip_set_id_t
+find_set_id(const char *name)
+{
+ ip_set_id_t i, index = IPSET_INVALID_ID;
+ const struct ip_set *set;
+
+ for (i = 0; index == IPSET_INVALID_ID && i < ip_set_max; i++) {
+ set = ip_set_list[i];
+ if (set != NULL && STREQ(set->name, name))
+ index = i;
+ }
+ return index;
+}
+
+static inline struct ip_set *
+find_set(const char *name)
+{
+ ip_set_id_t index = find_set_id(name);
+
+ return index == IPSET_INVALID_ID ? NULL : ip_set_list[index];
+}
+
+static int
+find_free_id(const char *name, ip_set_id_t *index, struct ip_set **set)
+{
+ ip_set_id_t i;
+
+ *index = IPSET_INVALID_ID;
+ for (i = 0; i < ip_set_max; i++) {
+ if (ip_set_list[i] == NULL) {
+ if (*index == IPSET_INVALID_ID)
+ *index = i;
+ } else if (STREQ(name, ip_set_list[i]->name)) {
+ /* Name clash */
+ *set = ip_set_list[i];
+ return -EEXIST;
+ }
+ }
+ if (*index == IPSET_INVALID_ID)
+ /* No free slot remained */
+ return -IPSET_ERR_MAX_SETS;
+ return 0;
+}
+
+static int
+ip_set_create(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ struct ip_set *set, *clash;
+ ip_set_id_t index = IPSET_INVALID_ID;
+ struct nlattr *tb[IPSET_ATTR_CREATE_MAX+1] = {};
+ const char *name, *typename;
+ u8 family, revision;
+ u32 flags = flag_exist(nlh);
+ int ret = 0;
+
+ if (unlikely(protocol_failed(attr) ||
+ attr[IPSET_ATTR_SETNAME] == NULL ||
+ attr[IPSET_ATTR_TYPENAME] == NULL ||
+ attr[IPSET_ATTR_REVISION] == NULL ||
+ attr[IPSET_ATTR_FAMILY] == NULL ||
+ (attr[IPSET_ATTR_DATA] != NULL &&
+ !flag_nested(attr[IPSET_ATTR_DATA]))))
+ return -IPSET_ERR_PROTOCOL;
+
+ name = nla_data(attr[IPSET_ATTR_SETNAME]);
+ typename = nla_data(attr[IPSET_ATTR_TYPENAME]);
+ family = nla_get_u8(attr[IPSET_ATTR_FAMILY]);
+ revision = nla_get_u8(attr[IPSET_ATTR_REVISION]);
+ pr_debug("setname: %s, typename: %s, family: %s, revision: %u\n",
+ name, typename, family_name(family), revision);
+
+ /*
+ * First, and without any locks, allocate and initialize
+ * a normal base set structure.
+ */
+ set = kzalloc(sizeof(struct ip_set), GFP_KERNEL);
+ if (!set)
+ return -ENOMEM;
+ rwlock_init(&set->lock);
+ strlcpy(set->name, name, IPSET_MAXNAMELEN);
+ atomic_set(&set->ref, 0);
+ set->family = family;
+
+ /*
+ * Next, check that we know the type, and take
+ * a reference on the type, to make sure it stays available
+ * while constructing our new set.
+ *
+ * After referencing the type, we try to create the type
+ * specific part of the set without holding any locks.
+ */
+ ret = find_set_type_get(typename, family, revision, &(set->type));
+ if (ret)
+ goto out;
+
+ /*
+ * Without holding any locks, create private part.
+ */
+ if (attr[IPSET_ATTR_DATA] &&
+ nla_parse(tb, IPSET_ATTR_CREATE_MAX,
+ nla_data(attr[IPSET_ATTR_DATA]),
+ nla_len(attr[IPSET_ATTR_DATA]),
+ set->type->create_policy)) {
+ ret = -IPSET_ERR_PROTOCOL;
+ goto put_out;
+ }
+
+ ret = set->type->create(set, tb, flags);
+ if (ret != 0)
+ goto put_out;
+
+ /* BTW, ret==0 here. */
+
+ /*
+ * Here, we have a valid, constructed set and we are protected
+ * by nfnl_lock. Find the first free index in ip_set_list and
+ * check clashing.
+ */
+ if ((ret = find_free_id(set->name, &index, &clash)) != 0) {
+ /* If this is the same set and requested, ignore error */
+ if (ret == -EEXIST &&
+ (flags & IPSET_FLAG_EXIST) &&
+ STREQ(set->type->name, clash->type->name) &&
+ set->type->family == clash->type->family &&
+ set->type->revision == clash->type->revision &&
+ set->variant->same_set(set, clash))
+ ret = 0;
+ goto cleanup;
+ }
+
+ /*
+ * Finally! Add our shiny new set to the list, and be done.
+ */
+ pr_debug("create: '%s' created with index %u!\n", set->name, index);
+ ip_set_list[index] = set;
+
+ return ret;
+
+cleanup:
+ set->variant->destroy(set);
+put_out:
+ module_put(set->type->me);
+out:
+ kfree(set);
+ return ret;
+}
+
+/* Destroy sets */
+
+static const struct nla_policy
+ip_set_setname_policy[IPSET_ATTR_CMD_MAX + 1] = {
+ [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
+ [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
+ .len = IPSET_MAXNAMELEN - 1 },
+};
+
+static void
+ip_set_destroy_set(ip_set_id_t index)
+{
+ struct ip_set *set = ip_set_list[index];
+
+ pr_debug("set: %s\n", set->name);
+ ip_set_list[index] = NULL;
+
+ /* Must call it without holding any lock */
+ set->variant->destroy(set);
+ module_put(set->type->me);
+ kfree(set);
+}
+
+static int
+ip_set_destroy(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ ip_set_id_t i;
+
+ if (unlikely(protocol_failed(attr)))
+ return -IPSET_ERR_PROTOCOL;
+
+ /* References are protected by the nfnl mutex */
+ if (!attr[IPSET_ATTR_SETNAME]) {
+ for (i = 0; i < ip_set_max; i++) {
+ if (ip_set_list[i] != NULL &&
+ (atomic_read(&ip_set_list[i]->ref)))
+ return -IPSET_ERR_BUSY;
+ }
+ for (i = 0; i < ip_set_max; i++) {
+ if (ip_set_list[i] != NULL)
+ ip_set_destroy_set(i);
+ }
+ } else {
+ i = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
+ if (i == IPSET_INVALID_ID)
+ return -ENOENT;
+ else if (atomic_read(&ip_set_list[i]->ref))
+ return -IPSET_ERR_BUSY;
+
+ ip_set_destroy_set(i);
+ }
+ return 0;
+}
+
+/* Flush sets */
+
+static void
+ip_set_flush_set(struct ip_set *set)
+{
+ pr_debug("set: %s\n", set->name);
+
+ write_lock_bh(&set->lock);
+ set->variant->flush(set);
+ write_unlock_bh(&set->lock);
+}
+
+static int
+ip_set_flush(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ ip_set_id_t i;
+
+ if (unlikely(protocol_failed(attr)))
+ return -EPROTO;
+
+ if (!attr[IPSET_ATTR_SETNAME]) {
+ for (i = 0; i < ip_set_max; i++)
+ if (ip_set_list[i] != NULL)
+ ip_set_flush_set(ip_set_list[i]);
+ } else {
+ i = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
+ if (i == IPSET_INVALID_ID)
+ return -ENOENT;
+
+ ip_set_flush_set(ip_set_list[i]);
+ }
+
+ return 0;
+}
+
+/* Rename a set */
+
+static const struct nla_policy
+ip_set_setname2_policy[IPSET_ATTR_CMD_MAX + 1] = {
+ [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
+ [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
+ .len = IPSET_MAXNAMELEN - 1 },
+ [IPSET_ATTR_SETNAME2] = { .type = NLA_NUL_STRING,
+ .len = IPSET_MAXNAMELEN - 1 },
+};
+
+static int
+ip_set_rename(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ struct ip_set *set;
+ const char *name2;
+ ip_set_id_t i;
+
+ if (unlikely(protocol_failed(attr) ||
+ attr[IPSET_ATTR_SETNAME] == NULL ||
+ attr[IPSET_ATTR_SETNAME2] == NULL))
+ return -IPSET_ERR_PROTOCOL;
+
+ set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
+ if (set == NULL)
+ return -ENOENT;
+ if (atomic_read(&set->ref) != 0)
+ return -IPSET_ERR_REFERENCED;
+
+ name2 = nla_data(attr[IPSET_ATTR_SETNAME2]);
+ for (i = 0; i < ip_set_max; i++) {
+ if (ip_set_list[i] != NULL &&
+ STREQ(ip_set_list[i]->name, name2))
+ return -IPSET_ERR_EXIST_SETNAME2;
+ }
+ strncpy(set->name, name2, IPSET_MAXNAMELEN);
+
+ return 0;
+}
+
+/* Swap two sets so that name/index points to the other.
+ * References and set names are also swapped.
+ *
+ * We are protected by the nfnl mutex and references are
+ * manipulated only by holding the mutex. The kernel interfaces
+ * do not hold the mutex but the pointer settings are atomic
+ * so the ip_set_list always contains valid pointers to the sets.
+ */
+
+static int
+ip_set_swap(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ struct ip_set *from, *to;
+ ip_set_id_t from_id, to_id;
+ char from_name[IPSET_MAXNAMELEN];
+ u32 from_ref;
+
+ if (unlikely(protocol_failed(attr) ||
+ attr[IPSET_ATTR_SETNAME] == NULL ||
+ attr[IPSET_ATTR_SETNAME2] == NULL))
+ return -IPSET_ERR_PROTOCOL;
+
+ from_id = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
+ if (from_id == IPSET_INVALID_ID)
+ return -ENOENT;
+
+ to_id = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME2]));
+ if (to_id == IPSET_INVALID_ID)
+ return -IPSET_ERR_EXIST_SETNAME2;
+
+ from = ip_set_list[from_id];
+ to = ip_set_list[to_id];
+
+ /* Features must not change.
+ * Not an artifical restriction anymore, as we must prevent
+ * possible loops created by swapping in setlist type of sets. */
+ if (!(from->type->features == to->type->features &&
+ from->type->family == to->type->family))
+ return -IPSET_ERR_TYPE_MISMATCH;
+
+ /* No magic here: ref munging protected by the nfnl_lock */
+ strncpy(from_name, from->name, IPSET_MAXNAMELEN);
+ from_ref = atomic_read(&from->ref);
+
+ strncpy(from->name, to->name, IPSET_MAXNAMELEN);
+ atomic_set(&from->ref, atomic_read(&to->ref));
+ strncpy(to->name, from_name, IPSET_MAXNAMELEN);
+ atomic_set(&to->ref, from_ref);
+
+ ip_set_list[from_id] = to;
+ ip_set_list[to_id] = from;
+
+ return 0;
+}
+
+/* List/save set data */
+
+#define DUMP_INIT 0L
+#define DUMP_ALL 1L
+#define DUMP_ONE 2L
+#define DUMP_LAST 3L
+
+static int
+ip_set_dump_done(struct netlink_callback *cb)
+{
+ if (cb->args[2]) {
+ pr_debug("release set %s\n", ip_set_list[cb->args[1]]->name);
+ __ip_set_put((ip_set_id_t) cb->args[1]);
+ }
+ return 0;
+}
+
+static inline void
+dump_attrs(struct nlmsghdr *nlh)
+{
+ const struct nlattr *attr;
+ int rem;
+
+ pr_debug("dump nlmsg\n");
+ nlmsg_for_each_attr(attr, nlh, sizeof(struct nfgenmsg), rem) {
+ pr_debug("type: %u, len %u\n", nla_type(attr), attr->nla_len);
+ }
+}
+
+static int
+dump_init(struct netlink_callback *cb)
+{
+ struct nlmsghdr *nlh = nlmsg_hdr(cb->skb);
+ int min_len = NLMSG_SPACE(sizeof(struct nfgenmsg));
+ struct nlattr *cda[IPSET_ATTR_CMD_MAX+1];
+ struct nlattr *attr = (void *)nlh + min_len;
+ ip_set_id_t index;
+
+ /* Second pass, so parser can't fail */
+ nla_parse(cda, IPSET_ATTR_CMD_MAX,
+ attr, nlh->nlmsg_len - min_len, ip_set_setname_policy);
+
+ /* cb->args[0] : dump single set/all sets
+ * [1] : set index
+ * [..]: type specific
+ */
+
+ if (!cda[IPSET_ATTR_SETNAME]) {
+ cb->args[0] = DUMP_ALL;
+ return 0;
+ }
+
+ index = find_set_id(nla_data(cda[IPSET_ATTR_SETNAME]));
+ if (index == IPSET_INVALID_ID)
+ return -ENOENT;
+
+ cb->args[0] = DUMP_ONE;
+ cb->args[1] = index;
+ return 0;
+}
+
+static int
+ip_set_dump_start(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ ip_set_id_t index = IPSET_INVALID_ID, max;
+ struct ip_set *set = NULL;
+ struct nlmsghdr *nlh = NULL;
+ unsigned int flags = NETLINK_CB(cb->skb).pid ? NLM_F_MULTI : 0;
+ int ret = 0;
+
+ if (cb->args[0] == DUMP_INIT) {
+ ret = dump_init(cb);
+ if (ret < 0) {
+ nlh = nlmsg_hdr(cb->skb);
+ /* We have to create and send the error message
+ * manually :-( */
+ if (nlh->nlmsg_flags & NLM_F_ACK)
+ netlink_ack(cb->skb, nlh, ret);
+ return ret;
+ }
+ }
+
+ if (cb->args[1] >= ip_set_max)
+ goto out;
+
+ pr_debug("args[0]: %ld args[1]: %ld\n", cb->args[0], cb->args[1]);
+ max = cb->args[0] == DUMP_ONE ? cb->args[1] + 1 : ip_set_max;
+ for (; cb->args[1] < max; cb->args[1]++) {
+ index = (ip_set_id_t) cb->args[1];
+ set = ip_set_list[index];
+ if (set == NULL) {
+ if (cb->args[0] == DUMP_ONE) {
+ ret = -ENOENT;
+ goto out;
+ }
+ continue;
+ }
+ /* When dumping all sets, we must dump "sorted"
+ * so that lists (unions of sets) are dumped last.
+ */
+ if (cb->args[0] != DUMP_ONE &&
+ !((cb->args[0] == DUMP_ALL) ^
+ (set->type->features & IPSET_DUMP_LAST)))
+ continue;
+ pr_debug("List set: %s\n", set->name);
+ if (!cb->args[2]) {
+ /* Start listing: make sure set won't be destroyed */
+ pr_debug("reference set\n");
+ __ip_set_get(index);
+ }
+ nlh = start_msg(skb, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, flags,
+ IPSET_CMD_LIST);
+ if (!nlh) {
+ ret = -EMSGSIZE;
+ goto release_refcount;
+ }
+ NLA_PUT_U8(skb, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
+ NLA_PUT_STRING(skb, IPSET_ATTR_SETNAME, set->name);
+ switch (cb->args[2]) {
+ case 0:
+ /* Core header data */
+ NLA_PUT_STRING(skb, IPSET_ATTR_TYPENAME,
+ set->type->name);
+ NLA_PUT_U8(skb, IPSET_ATTR_FAMILY,
+ set->family);
+ NLA_PUT_U8(skb, IPSET_ATTR_REVISION,
+ set->type->revision);
+ ret = set->variant->head(set, skb);
+ if (ret < 0)
+ goto release_refcount;
+ /* Fall through and add elements */
+ default:
+ read_lock_bh(&set->lock);
+ ret = set->variant->list(set, skb, cb);
+ read_unlock_bh(&set->lock);
+ if (!cb->args[2]) {
+ /* Set is done, proceed with next one */
+ if (cb->args[0] == DUMP_ONE)
+ cb->args[1] = IPSET_INVALID_ID;
+ else
+ cb->args[1]++;
+ }
+ goto release_refcount;
+ }
+ }
+ goto out;
+
+nla_put_failure:
+ ret = -EFAULT;
+release_refcount:
+ /* If there was an error or set is done, release set */
+ if (ret || !cb->args[2]) {
+ pr_debug("release set %s\n", ip_set_list[index]->name);
+ __ip_set_put(index);
+ }
+
+ /* If we dump all sets, continue with dumping last ones */
+ if (cb->args[0] == DUMP_ALL && cb->args[1] >= max && !cb->args[2])
+ cb->args[0] = DUMP_LAST;
+
+out:
+ if (nlh) {
+ nlmsg_end(skb, nlh);
+ pr_debug("nlmsg_len: %u\n", nlh->nlmsg_len);
+ dump_attrs(nlh);
+ }
+
+ return ret < 0 ? ret : skb->len;
+}
+
+static int
+ip_set_dump(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ if (unlikely(protocol_failed(attr)))
+ return -IPSET_ERR_PROTOCOL;
+
+ return netlink_dump_start(ctnl, skb, nlh,
+ ip_set_dump_start,
+ ip_set_dump_done);
+}
+
+/* Add, del and test */
+
+static const struct nla_policy ip_set_adt_policy[IPSET_ATTR_CMD_MAX + 1] = {
+ [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
+ [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
+ .len = IPSET_MAXNAMELEN - 1 },
+ [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
+ [IPSET_ATTR_DATA] = { .type = NLA_NESTED },
+ [IPSET_ATTR_ADT] = { .type = NLA_NESTED },
+};
+
+static int
+call_ad(struct sk_buff *skb, struct ip_set *set,
+ struct nlattr *tb[], enum ipset_adt adt,
+ u32 flags, bool use_lineno)
+{
+ int ret, retried = 0;
+ u32 lineno = 0;
+ bool eexist = flags & IPSET_FLAG_EXIST;
+
+ do {
+ write_lock_bh(&set->lock);
+ ret = set->variant->uadt(set, tb, adt, &lineno, flags);
+ write_unlock_bh(&set->lock);
+ } while (ret == -EAGAIN &&
+ set->variant->resize &&
+ (ret = set->variant->resize(set, retried++)) == 0);
+
+ if (!ret || (ret == -IPSET_ERR_EXIST && eexist))
+ return 0;
+ if (lineno && use_lineno) {
+ /* Error in restore/batch mode: send back lineno */
+ struct nlmsghdr *nlh = nlmsg_hdr(skb);
+ int min_len = NLMSG_SPACE(sizeof(struct nfgenmsg));
+ struct nlattr *cda[IPSET_ATTR_CMD_MAX+1];
+ struct nlattr *cmdattr = (void *)nlh + min_len;
+ u32 *errline;
+
+ nla_parse(cda, IPSET_ATTR_CMD_MAX,
+ cmdattr, nlh->nlmsg_len - min_len,
+ ip_set_adt_policy);
+
+ errline = nla_data(cda[IPSET_ATTR_LINENO]);
+
+ *errline = lineno;
+ }
+
+ return ret;
+}
+
+static int
+ip_set_uadd(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ struct ip_set *set;
+ struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
+ const struct nlattr *nla;
+ u32 flags = flag_exist(nlh);
+ bool use_lineno;
+ int ret = 0;
+
+ if (unlikely(protocol_failed(attr) ||
+ attr[IPSET_ATTR_SETNAME] == NULL ||
+ !((attr[IPSET_ATTR_DATA] != NULL) ^
+ (attr[IPSET_ATTR_ADT] != NULL)) ||
+ (attr[IPSET_ATTR_DATA] != NULL &&
+ !flag_nested(attr[IPSET_ATTR_DATA])) ||
+ (attr[IPSET_ATTR_ADT] != NULL &&
+ (!flag_nested(attr[IPSET_ATTR_ADT]) ||
+ attr[IPSET_ATTR_LINENO] == NULL))))
+ return -IPSET_ERR_PROTOCOL;
+
+ set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
+ if (set == NULL)
+ return -ENOENT;
+
+ use_lineno = !!attr[IPSET_ATTR_LINENO];
+ if (attr[IPSET_ATTR_DATA]) {
+ if (nla_parse(tb, IPSET_ATTR_ADT_MAX,
+ nla_data(attr[IPSET_ATTR_DATA]),
+ nla_len(attr[IPSET_ATTR_DATA]),
+ set->type->adt_policy))
+ return -IPSET_ERR_PROTOCOL;
+ ret = call_ad(skb, set, tb, IPSET_ADD, flags, use_lineno);
+ } else {
+ int nla_rem;
+
+ nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) {
+ memset(tb, 0, sizeof(tb));
+ if (nla_type(nla) != IPSET_ATTR_DATA ||
+ !flag_nested(nla) ||
+ nla_parse(tb, IPSET_ATTR_ADT_MAX,
+ nla_data(nla), nla_len(nla),
+ set->type->adt_policy))
+ return -IPSET_ERR_PROTOCOL;
+ ret = call_ad(skb, set, tb, IPSET_ADD,
+ flags, use_lineno);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ return ret;
+}
+
+static int
+ip_set_udel(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ struct ip_set *set;
+ struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
+ const struct nlattr *nla;
+ u32 flags = flag_exist(nlh);
+ bool use_lineno;
+ int ret = 0;
+
+ if (unlikely(protocol_failed(attr) ||
+ attr[IPSET_ATTR_SETNAME] == NULL ||
+ !((attr[IPSET_ATTR_DATA] != NULL) ^
+ (attr[IPSET_ATTR_ADT] != NULL)) ||
+ (attr[IPSET_ATTR_DATA] != NULL &&
+ !flag_nested(attr[IPSET_ATTR_DATA])) ||
+ (attr[IPSET_ATTR_ADT] != NULL &&
+ (!flag_nested(attr[IPSET_ATTR_ADT]) ||
+ attr[IPSET_ATTR_LINENO] == NULL))))
+ return -IPSET_ERR_PROTOCOL;
+
+ set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
+ if (set == NULL)
+ return -ENOENT;
+
+ use_lineno = !!attr[IPSET_ATTR_LINENO];
+ if (attr[IPSET_ATTR_DATA]) {
+ if (nla_parse(tb, IPSET_ATTR_ADT_MAX,
+ nla_data(attr[IPSET_ATTR_DATA]),
+ nla_len(attr[IPSET_ATTR_DATA]),
+ set->type->adt_policy))
+ return -IPSET_ERR_PROTOCOL;
+ ret = call_ad(skb, set, tb, IPSET_DEL, flags, use_lineno);
+ } else {
+ int nla_rem;
+
+ nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) {
+ memset(tb, 0, sizeof(*tb));
+ if (nla_type(nla) != IPSET_ATTR_DATA ||
+ !flag_nested(nla) ||
+ nla_parse(tb, IPSET_ATTR_ADT_MAX,
+ nla_data(nla), nla_len(nla),
+ set->type->adt_policy))
+ return -IPSET_ERR_PROTOCOL;
+ ret = call_ad(skb, set, tb, IPSET_DEL,
+ flags, use_lineno);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ return ret;
+}
+
+static int
+ip_set_utest(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ struct ip_set *set;
+ struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
+ int ret = 0;
+
+ if (unlikely(protocol_failed(attr) ||
+ attr[IPSET_ATTR_SETNAME] == NULL ||
+ attr[IPSET_ATTR_DATA] == NULL ||
+ !flag_nested(attr[IPSET_ATTR_DATA])))
+ return -IPSET_ERR_PROTOCOL;
+
+ set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
+ if (set == NULL)
+ return -ENOENT;
+
+ if (nla_parse(tb, IPSET_ATTR_ADT_MAX,
+ nla_data(attr[IPSET_ATTR_DATA]),
+ nla_len(attr[IPSET_ATTR_DATA]),
+ set->type->adt_policy))
+ return -IPSET_ERR_PROTOCOL;
+
+ read_lock_bh(&set->lock);
+ ret = set->variant->uadt(set, tb, IPSET_TEST, NULL, 0);
+ read_unlock_bh(&set->lock);
+ /* Userspace can't trigger element to be re-added */
+ if (ret == -EAGAIN)
+ ret = 1;
+
+ return ret < 0 ? ret : ret > 0 ? 0 : -IPSET_ERR_EXIST;
+}
+
+/* Get headed data of a set */
+
+static int
+ip_set_header(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ const struct ip_set *set;
+ struct sk_buff *skb2;
+ struct nlmsghdr *nlh2;
+ ip_set_id_t index;
+ int ret = 0;
+
+ if (unlikely(protocol_failed(attr) ||
+ attr[IPSET_ATTR_SETNAME] == NULL))
+ return -IPSET_ERR_PROTOCOL;
+
+ index = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
+ if (index == IPSET_INVALID_ID)
+ return -ENOENT;
+ set = ip_set_list[index];
+
+ skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (skb2 == NULL)
+ return -ENOMEM;
+
+ nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
+ IPSET_CMD_HEADER);
+ if (!nlh2)
+ goto nlmsg_failure;
+ NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
+ NLA_PUT_STRING(skb2, IPSET_ATTR_SETNAME, set->name);
+ NLA_PUT_STRING(skb2, IPSET_ATTR_TYPENAME, set->type->name);
+ NLA_PUT_U8(skb2, IPSET_ATTR_FAMILY, set->family);
+ NLA_PUT_U8(skb2, IPSET_ATTR_REVISION, set->type->revision);
+ nlmsg_end(skb2, nlh2);
+
+ ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+
+nla_put_failure:
+ nlmsg_cancel(skb2, nlh2);
+nlmsg_failure:
+ kfree_skb(skb2);
+ return -EMSGSIZE;
+}
+
+/* Get type data */
+
+static const struct nla_policy ip_set_type_policy[IPSET_ATTR_CMD_MAX + 1] = {
+ [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
+ [IPSET_ATTR_TYPENAME] = { .type = NLA_NUL_STRING,
+ .len = IPSET_MAXNAMELEN - 1 },
+ [IPSET_ATTR_FAMILY] = { .type = NLA_U8 },
+};
+
+static int
+ip_set_type(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ struct sk_buff *skb2;
+ struct nlmsghdr *nlh2;
+ u8 family, min, max;
+ const char *typename;
+ int ret = 0;
+
+ if (unlikely(protocol_failed(attr) ||
+ attr[IPSET_ATTR_TYPENAME] == NULL ||
+ attr[IPSET_ATTR_FAMILY] == NULL))
+ return -IPSET_ERR_PROTOCOL;
+
+ family = nla_get_u8(attr[IPSET_ATTR_FAMILY]);
+ typename = nla_data(attr[IPSET_ATTR_TYPENAME]);
+ ret = find_set_type_minmax(typename, family, &min, &max);
+ if (ret)
+ return ret;
+
+ skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (skb2 == NULL)
+ return -ENOMEM;
+
+ nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
+ IPSET_CMD_TYPE);
+ if (!nlh2)
+ goto nlmsg_failure;
+ NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
+ NLA_PUT_STRING(skb2, IPSET_ATTR_TYPENAME, typename);
+ NLA_PUT_U8(skb2, IPSET_ATTR_FAMILY, family);
+ NLA_PUT_U8(skb2, IPSET_ATTR_REVISION, max);
+ NLA_PUT_U8(skb2, IPSET_ATTR_REVISION_MIN, min);
+ nlmsg_end(skb2, nlh2);
+
+ pr_debug("Send TYPE, nlmsg_len: %u\n", nlh2->nlmsg_len);
+ ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+
+nla_put_failure:
+ nlmsg_cancel(skb2, nlh2);
+nlmsg_failure:
+ kfree_skb(skb2);
+ return -EMSGSIZE;
+}
+
+/* Get protocol version */
+
+static const struct nla_policy
+ip_set_protocol_policy[IPSET_ATTR_CMD_MAX + 1] = {
+ [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
+};
+
+static int
+ip_set_protocol(struct sock *ctnl, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const attr[])
+{
+ struct sk_buff *skb2;
+ struct nlmsghdr *nlh2;
+ int ret = 0;
+
+ if (unlikely(attr[IPSET_ATTR_PROTOCOL] == NULL))
+ return -IPSET_ERR_PROTOCOL;
+
+ skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (skb2 == NULL)
+ return -ENOMEM;
+
+ nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
+ IPSET_CMD_PROTOCOL);
+ if (!nlh2)
+ goto nlmsg_failure;
+ NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
+ nlmsg_end(skb2, nlh2);
+
+ ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+
+nla_put_failure:
+ nlmsg_cancel(skb2, nlh2);
+nlmsg_failure:
+ kfree_skb(skb2);
+ return -EMSGSIZE;
+}
+
+static const struct nfnl_callback ip_set_netlink_subsys_cb[IPSET_MSG_MAX] = {
+ [IPSET_CMD_CREATE] = {
+ .call = ip_set_create,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_create_policy,
+ },
+ [IPSET_CMD_DESTROY] = {
+ .call = ip_set_destroy,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_setname_policy,
+ },
+ [IPSET_CMD_FLUSH] = {
+ .call = ip_set_flush,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_setname_policy,
+ },
+ [IPSET_CMD_RENAME] = {
+ .call = ip_set_rename,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_setname2_policy,
+ },
+ [IPSET_CMD_SWAP] = {
+ .call = ip_set_swap,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_setname2_policy,
+ },
+ [IPSET_CMD_LIST] = {
+ .call = ip_set_dump,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_setname_policy,
+ },
+ [IPSET_CMD_SAVE] = {
+ .call = ip_set_dump,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_setname_policy,
+ },
+ [IPSET_CMD_ADD] = {
+ .call = ip_set_uadd,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_adt_policy,
+ },
+ [IPSET_CMD_DEL] = {
+ .call = ip_set_udel,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_adt_policy,
+ },
+ [IPSET_CMD_TEST] = {
+ .call = ip_set_utest,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_adt_policy,
+ },
+ [IPSET_CMD_HEADER] = {
+ .call = ip_set_header,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_setname_policy,
+ },
+ [IPSET_CMD_TYPE] = {
+ .call = ip_set_type,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_type_policy,
+ },
+ [IPSET_CMD_PROTOCOL] = {
+ .call = ip_set_protocol,
+ .attr_count = IPSET_ATTR_CMD_MAX,
+ .policy = ip_set_protocol_policy,
+ },
+};
+
+static struct nfnetlink_subsystem ip_set_netlink_subsys __read_mostly = {
+ .name = "ip_set",
+ .subsys_id = NFNL_SUBSYS_IPSET,
+ .cb_count = IPSET_MSG_MAX,
+ .cb = ip_set_netlink_subsys_cb,
+};
+
+/* Interface to iptables/ip6tables */
+
+static int
+ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len)
+{
+ unsigned *op;
+ void *data;
+ int copylen = *len, ret = 0;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (optval != SO_IP_SET)
+ return -EBADF;
+ if (*len < sizeof(unsigned))
+ return -EINVAL;
+
+ data = vmalloc(*len);
+ if (!data)
+ return -ENOMEM;
+ if (copy_from_user(data, user, *len) != 0) {
+ ret = -EFAULT;
+ goto done;
+ }
+ op = (unsigned *) data;
+
+ if (*op < IP_SET_OP_VERSION) {
+ /* Check the version at the beginning of operations */
+ struct ip_set_req_version *req_version = data;
+ if (req_version->version != IPSET_PROTOCOL) {
+ ret = -EPROTO;
+ goto done;
+ }
+ }
+
+ switch (*op) {
+ case IP_SET_OP_VERSION: {
+ struct ip_set_req_version *req_version = data;
+
+ if (*len != sizeof(struct ip_set_req_version)) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ req_version->version = IPSET_PROTOCOL;
+ ret = copy_to_user(user, req_version,
+ sizeof(struct ip_set_req_version));
+ goto done;
+ }
+ case IP_SET_OP_GET_BYNAME: {
+ struct ip_set_req_get_set *req_get = data;
+
+ if (*len != sizeof(struct ip_set_req_get_set)) {
+ ret = -EINVAL;
+ goto done;
+ }
+ req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0';
+ nfnl_lock();
+ req_get->set.index = find_set_id(req_get->set.name);
+ nfnl_unlock();
+ goto copy;
+ }
+ case IP_SET_OP_GET_BYINDEX: {
+ struct ip_set_req_get_set *req_get = data;
+
+ if (*len != sizeof(struct ip_set_req_get_set) ||
+ req_get->set.index >= ip_set_max) {
+ ret = -EINVAL;
+ goto done;
+ }
+ nfnl_lock();
+ strncpy(req_get->set.name,
+ ip_set_list[req_get->set.index]
+ ? ip_set_list[req_get->set.index]->name : "",
+ IPSET_MAXNAMELEN);
+ nfnl_unlock();
+ goto copy;
+ }
+ default:
+ ret = -EBADMSG;
+ goto done;
+ } /* end of switch(op) */
+
+copy:
+ ret = copy_to_user(user, data, copylen);
+
+done:
+ vfree(data);
+ if (ret > 0)
+ ret = 0;
+ return ret;
+}
+
+static struct nf_sockopt_ops so_set __read_mostly = {
+ .pf = PF_INET,
+ .get_optmin = SO_IP_SET,
+ .get_optmax = SO_IP_SET + 1,
+ .get = &ip_set_sockfn_get,
+ .owner = THIS_MODULE,
+};
+
+static int __init
+ip_set_init(void)
+{
+ int ret;
+
+ if (max_sets)
+ ip_set_max = max_sets;
+ if (ip_set_max >= IPSET_INVALID_ID)
+ ip_set_max = IPSET_INVALID_ID - 1;
+
+ ip_set_list = kzalloc(sizeof(struct ip_set *) * ip_set_max,
+ GFP_KERNEL);
+ if (!ip_set_list) {
+ pr_err("ip_set: Unable to create ip_set_list\n");
+ return -ENOMEM;
+ }
+
+ ret = nfnetlink_subsys_register(&ip_set_netlink_subsys);
+ if (ret != 0) {
+ pr_err("ip_set: cannot register with nfnetlink.\n");
+ kfree(ip_set_list);
+ return ret;
+ }
+ ret = nf_register_sockopt(&so_set);
+ if (ret != 0) {
+ pr_err("SO_SET registry failed: %d\n", ret);
+ nfnetlink_subsys_unregister(&ip_set_netlink_subsys);
+ kfree(ip_set_list);
+ return ret;
+ }
+
+ pr_notice("ip_set: protocol %u\n", IPSET_PROTOCOL);
+ return 0;
+}
+
+static void __exit
+ip_set_fini(void)
+{
+ /* There can't be any existing set */
+ nf_unregister_sockopt(&so_set);
+ nfnetlink_subsys_unregister(&ip_set_netlink_subsys);
+ kfree(ip_set_list);
+ pr_debug("these are the famous last words\n");
+}
+
+module_init(ip_set_init);
+module_exit(ip_set_fini);
diff --git a/net/netfilter/ipset/ip_set_getport.c b/net/netfilter/ipset/ip_set_getport.c
new file mode 100644
index 000000000000..76737bba28ee
--- /dev/null
+++ b/net/netfilter/ipset/ip_set_getport.c
@@ -0,0 +1,136 @@
+/* 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.
+ */
+
+/* Get Layer-4 data from the packets */
+
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/icmp.h>
+#include <linux/icmpv6.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <net/ip.h>
+
+#include <linux/netfilter/ipset/ip_set_getport.h>
+
+/* We must handle non-linear skbs */
+static bool
+get_port(const struct sk_buff *skb, int protocol, unsigned int protooff,
+ bool src, __be16 *port, u8 *proto)
+{
+ switch (protocol) {
+ case IPPROTO_TCP: {
+ struct tcphdr _tcph;
+ const struct tcphdr *th;
+
+ th = skb_header_pointer(skb, protooff, sizeof(_tcph), &_tcph);
+ if (th == NULL)
+ /* No choice either */
+ return false;
+
+ *port = src ? th->source : th->dest;
+ break;
+ }
+ case IPPROTO_UDP: {
+ struct udphdr _udph;
+ const struct udphdr *uh;
+
+ uh = skb_header_pointer(skb, protooff, sizeof(_udph), &_udph);
+ if (uh == NULL)
+ /* No choice either */
+ return false;
+
+ *port = src ? uh->source : uh->dest;
+ break;
+ }
+ case IPPROTO_ICMP: {
+ struct icmphdr _ich;
+ const struct icmphdr *ic;
+
+ ic = skb_header_pointer(skb, protooff, sizeof(_ich), &_ich);
+ if (ic == NULL)
+ return false;
+
+ *port = (__force __be16)htons((ic->type << 8) | ic->code);
+ break;
+ }
+ case IPPROTO_ICMPV6: {
+ struct icmp6hdr _ich;
+ const struct icmp6hdr *ic;
+
+ ic = skb_header_pointer(skb, protooff, sizeof(_ich), &_ich);
+ if (ic == NULL)
+ return false;
+
+ *port = (__force __be16)
+ htons((ic->icmp6_type << 8) | ic->icmp6_code);
+ break;
+ }
+ default:
+ break;
+ }
+ *proto = protocol;
+
+ return true;
+}
+
+bool
+ip_set_get_ip4_port(const struct sk_buff *skb, bool src,
+ __be16 *port, u8 *proto)
+{
+ const struct iphdr *iph = ip_hdr(skb);
+ unsigned int protooff = ip_hdrlen(skb);
+ int protocol = iph->protocol;
+
+ /* See comments at tcp_match in ip_tables.c */
+ if (protocol <= 0 || (ntohs(iph->frag_off) & IP_OFFSET))
+ return false;
+
+ return get_port(skb, protocol, protooff, src, port, proto);
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ip4_port);
+
+bool
+ip_set_get_ip6_port(const struct sk_buff *skb, bool src,
+ __be16 *port, u8 *proto)
+{
+ unsigned int protooff = 0;
+ int protocol;
+ unsigned short fragoff;
+
+ protocol = ipv6_find_hdr(skb, &protooff, -1, &fragoff);
+ if (protocol <= 0 || fragoff)
+ return false;
+
+ return get_port(skb, protocol, protooff, src, port, proto);
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ip6_port);
+
+bool
+ip_set_get_ip_port(const struct sk_buff *skb, u8 pf, bool src, __be16 *port)
+{
+ bool ret;
+ u8 proto;
+
+ switch (pf) {
+ case AF_INET:
+ ret = ip_set_get_ip4_port(skb, src, port, &proto);
+ case AF_INET6:
+ ret = ip_set_get_ip6_port(skb, src, port, &proto);
+ default:
+ return false;
+ }
+ if (!ret)
+ return ret;
+ switch (proto) {
+ case IPPROTO_TCP:
+ case IPPROTO_UDP:
+ return true;
+ default:
+ return false;
+ }
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ip_port);
diff --git a/net/netfilter/ipset/pfxlen.c b/net/netfilter/ipset/pfxlen.c
new file mode 100644
index 000000000000..23f8c8162214
--- /dev/null
+++ b/net/netfilter/ipset/pfxlen.c
@@ -0,0 +1,291 @@
+#include <linux/netfilter/ipset/pfxlen.h>
+
+/*
+ * Prefixlen maps for fast conversions, by Jan Engelhardt.
+ */
+
+#define E(a, b, c, d) \
+ {.ip6 = { \
+ __constant_htonl(a), __constant_htonl(b), \
+ __constant_htonl(c), __constant_htonl(d), \
+ } }
+
+/*
+ * This table works for both IPv4 and IPv6;
+ * just use prefixlen_netmask_map[prefixlength].ip.
+ */
+const union nf_inet_addr ip_set_netmask_map[] = {
+ E(0x00000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0x80000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xC0000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xE0000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xF0000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xF8000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFC000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFE000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFF000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFF800000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFC00000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFE00000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFF00000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFF80000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFC0000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFE0000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFF8000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFC000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFE000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFF000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFF800, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFC00, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFE00, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFF00, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFF80, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFC0, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFE0, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFF0, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFF8, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFC, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFE, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0x80000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xC0000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xE0000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xF0000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xF8000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFC000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFE000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFF000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFF800000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFC00000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFE00000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFF00000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFF80000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFC0000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFE0000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFF0000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFF8000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFC000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFE000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFF000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFF800, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFC00, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFE00, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFF00, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFF80, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFC0, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFE0, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFF0, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFF8, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFC, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFE, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0x80000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xC0000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xE0000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xF0000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xF8000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFC000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFE000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFF000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFF800000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFC00000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFE00000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFF00000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFF80000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFC0000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFE0000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF0000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF8000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFC000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF800, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFC00, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFE00, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF00, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF80, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFC0, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFE0, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF0, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF8, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFC, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x80000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xC0000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xE0000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xF0000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xF8000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFC000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFE000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFF000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFF800000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFC00000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFE00000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFF00000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFF80000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFC0000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFE0000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF0000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF8000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFC000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF800),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFC00),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFE00),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF00),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF80),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFC0),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFE0),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF0),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF8),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFC),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF),
+};
+EXPORT_SYMBOL_GPL(ip_set_netmask_map);
+
+#undef E
+#define E(a, b, c, d) \
+ {.ip6 = { (__force __be32) a, (__force __be32) b, \
+ (__force __be32) c, (__force __be32) d, \
+ } }
+
+/*
+ * This table works for both IPv4 and IPv6;
+ * just use prefixlen_hostmask_map[prefixlength].ip.
+ */
+const union nf_inet_addr ip_set_hostmask_map[] = {
+ E(0x00000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0x80000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xC0000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xE0000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xF0000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xF8000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFC000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFE000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFF000000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFF800000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFC00000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFE00000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFF00000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFF80000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFC0000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFE0000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFF8000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFC000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFE000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFF000, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFF800, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFC00, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFE00, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFF00, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFF80, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFC0, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFE0, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFF0, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFF8, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFC, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFE, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0x80000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xC0000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xE0000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xF0000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xF8000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFC000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFE000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFF000000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFF800000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFC00000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFE00000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFF00000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFF80000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFC0000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFE0000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFF0000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFF8000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFC000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFE000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFF000, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFF800, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFC00, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFE00, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFF00, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFF80, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFC0, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFE0, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFF0, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFF8, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFC, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFE, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0x80000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xC0000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xE0000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xF0000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xF8000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFC000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFE000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFF000000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFF800000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFC00000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFE00000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFF00000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFF80000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFC0000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFE0000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF0000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF8000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFC000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF000, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF800, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFC00, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFE00, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF00, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF80, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFC0, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFE0, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF0, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF8, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFC, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x80000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xC0000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xE0000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xF0000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xF8000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFC000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFE000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFF000000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFF800000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFC00000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFE00000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFF00000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFF80000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFC0000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFE0000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF0000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF8000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFC000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF000),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF800),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFC00),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFE00),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF00),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF80),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFC0),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFE0),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF0),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF8),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFC),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE),
+ E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF),
+};
+EXPORT_SYMBOL_GPL(ip_set_hostmask_map);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.