This allows LEDs to be initialised in the ON state.
If unsure, say Y.
+comment "iptables trigger is under Netfilter config (LED target)"
+ depends on LEDS_TRIGGERS
+
endif # NEW_LEDS
header-y += xt_CONNMARK.h
header-y += xt_CONNSECMARK.h
header-y += xt_DSCP.h
+header-y += xt_LED.h
header-y += xt_MARK.h
header-y += xt_NFLOG.h
header-y += xt_NFQUEUE.h
header-y += xt_RATEEST.h
header-y += xt_SECMARK.h
header-y += xt_TCPMSS.h
+header-y += xt_TCPOPTSTRIP.h
+header-y += xt_TPROXY.h
header-y += xt_comment.h
header-y += xt_connbytes.h
+header-y += xt_connlimit.h
header-y += xt_connmark.h
header-y += xt_conntrack.h
+header-y += xt_cluster.h
header-y += xt_dccp.h
header-y += xt_dscp.h
header-y += xt_esp.h
header-y += xt_multiport.h
header-y += xt_owner.h
header-y += xt_pkttype.h
+header-y += xt_quota.h
header-y += xt_rateest.h
header-y += xt_realm.h
header-y += xt_recent.h
header-y += xt_string.h
header-y += xt_tcpmss.h
header-y += xt_tcpudp.h
+header-y += xt_time.h
+header-y += xt_u32.h
unifdef-y += nf_conntrack_common.h
unifdef-y += nf_conntrack_ftp.h
extern int nfnetlink_has_listeners(unsigned int group);
extern int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group,
int echo);
+extern void nfnetlink_set_err(u32 pid, u32 group, int error);
extern int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags);
extern void nfnl_lock(void);
{
struct list_head list;
- /* A unique name... */
- const char name[XT_TABLE_MAXNAMELEN];
-
/* What hooks you will enter on */
unsigned int valid_hooks;
/* Lock for the curtain */
- rwlock_t lock;
+ struct mutex lock;
/* Man behind the curtain... */
- //struct ip6t_table_info *private;
- void *private;
+ struct xt_table_info *private;
/* Set this to THIS_MODULE if you are a module, otherwise NULL */
struct module *me;
u_int8_t af; /* address/protocol family */
+
+ /* A unique name... */
+ const char name[XT_TABLE_MAXNAMELEN];
};
#include <linux/netfilter_ipv4.h>
/* ipt_entry tables: one per CPU */
/* Note : this field MUST be the last one, see XT_TABLE_INFO_SZ */
- char *entries[1];
+ void *entries[1];
};
#define XT_TABLE_INFO_SZ (offsetof(struct xt_table_info, entries) \
extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
extern void xt_free_table_info(struct xt_table_info *info);
+extern void xt_table_entry_swap_rcu(struct xt_table_info *old,
+ struct xt_table_info *new);
#ifdef CONFIG_COMPAT
#include <net/compat.h>
--- /dev/null
+#ifndef _XT_LED_H
+#define _XT_LED_H
+
+struct xt_led_info {
+ char id[27]; /* Unique ID for this trigger in the LED class */
+ __u8 always_blink; /* Blink even if the LED is already on */
+ __u32 delay; /* Delay until LED is switched off after trigger */
+
+ /* Kernel data used in the module */
+ void *internal_data __attribute__((aligned(8)));
+};
+
+#endif /* _XT_LED_H */
--- /dev/null
+#ifndef _XT_CLUSTER_MATCH_H
+#define _XT_CLUSTER_MATCH_H
+
+enum xt_cluster_flags {
+ XT_CLUSTER_F_INV = (1 << 0)
+};
+
+struct xt_cluster_match_info {
+ u_int32_t total_nodes;
+ u_int32_t node_mask;
+ u_int32_t hash_seed;
+ u_int32_t flags;
+};
+
+#endif /* _XT_CLUSTER_MATCH_H */
/* timings are in milliseconds. */
#define XT_LIMIT_SCALE 10000
+struct xt_limit_priv;
+
/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490
seconds, or one every 59 hours. */
struct xt_rateinfo {
u_int32_t burst; /* Period multiplier for upper limit. */
/* Used internally by the kernel */
- unsigned long prev;
- u_int32_t credit;
+ unsigned long prev; /* moved to xt_limit_priv */
+ u_int32_t credit; /* moved to xt_limit_priv */
u_int32_t credit_cap, cost;
- /* Ugly, ugly fucker. */
- struct xt_rateinfo *master;
+ struct xt_limit_priv *master;
};
#endif /*_XT_RATE_H*/
};
#define XT_QUOTA_MASK 0x1
+struct xt_quota_priv;
+
struct xt_quota_info {
u_int32_t flags;
u_int32_t pad;
/* Used internally by the kernel */
aligned_u64 quota;
- struct xt_quota_info *master;
+ struct xt_quota_priv *master;
};
#endif /* _XT_QUOTA_H */
};
#define XT_STATISTIC_MASK 0x1
+struct xt_statistic_priv;
+
struct xt_statistic_info {
u_int16_t mode;
u_int16_t flags;
struct {
u_int32_t every;
u_int32_t packet;
- /* Used internally by the kernel */
- u_int32_t count;
+ u_int32_t count; /* unused */
} nth;
} u;
- struct xt_statistic_info *master __attribute__((aligned(8)));
+ struct xt_statistic_priv *master __attribute__((aligned(8)));
};
#endif /* _XT_STATISTIC_H */
header-y += ip6t_limit.h
header-y += ip6t_mac.h
header-y += ip6t_mark.h
+header-y += ip6t_mh.h
header-y += ip6t_multiport.h
header-y += ip6t_opts.h
header-y += ip6t_owner.h
extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp);
extern unsigned int nf_conntrack_htable_size;
-extern int nf_conntrack_max;
+extern unsigned int nf_conntrack_max;
#define NF_CT_STAT_INC(net, count) \
(per_cpu_ptr((net)->ct.stat, raw_smp_processor_id())->count++)
struct module *me;
};
-/* Existing built-in protocols */
-extern struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6;
-extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4;
-extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6;
+/* Existing built-in generic protocol */
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_generic;
#define MAX_NF_CT_PROTO 256
extern struct nf_conntrack_l4proto *
__nf_ct_l4proto_find(u_int16_t l3proto, u_int8_t l4proto);
-extern struct nf_conntrack_l4proto *
-nf_ct_l4proto_find_get(u_int16_t l3proto, u_int8_t protocol);
-
-extern void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p);
-
/* Protocol registration. */
extern int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *proto);
extern void nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *proto);
#ifndef _NF_LOG_H
#define _NF_LOG_H
+#include <linux/netfilter.h>
+
/* those NF_LOG_* defines and struct nf_loginfo are legacy definitios that will
* disappear once iptables is replaced with pkttables. Please DO NOT use them
* for any new code! */
struct module *me;
nf_logfn *logfn;
char *name;
+ struct list_head list[NFPROTO_NUMPROTO];
};
/* Function to register/unregister log function. */
-int nf_log_register(u_int8_t pf, const struct nf_logger *logger);
-void nf_log_unregister(const struct nf_logger *logger);
-void nf_log_unregister_pf(u_int8_t pf);
+int nf_log_register(u_int8_t pf, struct nf_logger *logger);
+void nf_log_unregister(struct nf_logger *logger);
+
+int nf_log_bind_pf(u_int8_t pf, const struct nf_logger *logger);
+void nf_log_unbind_pf(u_int8_t pf);
/* Calls the registered backend logging function */
void nf_log_packet(u_int8_t pf,
.name = "broute",
.table = &initial_table,
.valid_hooks = 1 << NF_BR_BROUTING,
- .lock = __RW_LOCK_UNLOCKED(broute_table.lock),
.check = check,
.me = THIS_MODULE,
};
.name = "filter",
.table = &initial_table,
.valid_hooks = FILTER_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(frame_filter.lock),
.check = check,
.me = THIS_MODULE,
};
.name = "nat",
.table = &initial_table,
.valid_hooks = NAT_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(frame_nat.lock),
.check = check,
.me = THIS_MODULE,
};
default y
help
This option enables /proc and sysctl compatibility with the old
- layer 3 dependant connection tracking. This is needed to keep
+ layer 3 dependent connection tracking. This is needed to keep
old programs that have not been adapted to the new names working.
If unsure, say Y.
config IP_NF_MATCH_TTL
tristate '"ttl" match support'
depends on NETFILTER_ADVANCED
- help
- This adds CONFIG_IP_NF_MATCH_TTL option, which enabled the user
- to match packets by their TTL value.
-
- To compile it as a module, choose M here. If unsure, say N.
+ select NETFILTER_XT_MATCH_HL
+ ---help---
+ This is a backwards-compat option for the user's convenience
+ (e.g. when running oldconfig). It selects
+ CONFIG_NETFILTER_XT_MATCH_HL.
# `filter', generic and specific targets
config IP_NF_FILTER
To compile it as a module, choose M here. If unsure, say N.
config IP_NF_TARGET_TTL
- tristate 'TTL target support'
- depends on IP_NF_MANGLE
+ tristate '"TTL" target support'
depends on NETFILTER_ADVANCED
- help
- This option adds a `TTL' target, which enables the user to modify
- the TTL value of the IP header.
-
- While it is safe to decrement/lower the TTL, this target also enables
- functionality to increment and set the TTL value of the IP header to
- arbitrary values. This is EXTREMELY DANGEROUS since you can easily
- create immortal packets that loop forever on the network.
-
- To compile it as a module, choose M here. If unsure, say N.
+ select NETFILTER_XT_TARGET_HL
+ ---help---
+ This is a backwards-compat option for the user's convenience
+ (e.g. when running oldconfig). It selects
+ CONFIG_NETFILTER_XT_TARGET_HL.
# raw + specific targets
config IP_NF_RAW
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
-obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
# targets
obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.o
obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
-obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
# generic ARP tables
return (ret != 0);
}
+/*
+ * Unfortunatly, _b and _mask are not aligned to an int (or long int)
+ * Some arches dont care, unrolling the loop is a win on them.
+ */
+static unsigned long ifname_compare(const char *_a, const char *_b, const char *_mask)
+{
+#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+ const unsigned long *a = (const unsigned long *)_a;
+ const unsigned long *b = (const unsigned long *)_b;
+ const unsigned long *mask = (const unsigned long *)_mask;
+ unsigned long ret;
+
+ ret = (a[0] ^ b[0]) & mask[0];
+ if (IFNAMSIZ > sizeof(unsigned long))
+ ret |= (a[1] ^ b[1]) & mask[1];
+ if (IFNAMSIZ > 2 * sizeof(unsigned long))
+ ret |= (a[2] ^ b[2]) & mask[2];
+ if (IFNAMSIZ > 3 * sizeof(unsigned long))
+ ret |= (a[3] ^ b[3]) & mask[3];
+ BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
+#else
+ unsigned long ret = 0;
+ int i;
+
+ for (i = 0; i < IFNAMSIZ; i++)
+ ret |= (_a[i] ^ _b[i]) & _mask[i];
+#endif
+ return ret;
+}
+
/* Returns whether packet matches rule or not. */
static inline int arp_packet_match(const struct arphdr *arphdr,
struct net_device *dev,
const char *arpptr = (char *)(arphdr + 1);
const char *src_devaddr, *tgt_devaddr;
__be32 src_ipaddr, tgt_ipaddr;
- int i, ret;
+ long ret;
#define FWINV(bool, invflg) ((bool) ^ !!(arpinfo->invflags & (invflg)))
}
/* Look for ifname matches. */
- for (i = 0, ret = 0; i < IFNAMSIZ; i++) {
- ret |= (indev[i] ^ arpinfo->iniface[i])
- & arpinfo->iniface_mask[i];
- }
+ ret = ifname_compare(indev, arpinfo->iniface, arpinfo->iniface_mask);
if (FWINV(ret != 0, ARPT_INV_VIA_IN)) {
dprintf("VIA in mismatch (%s vs %s).%s\n",
return 0;
}
- for (i = 0, ret = 0; i < IFNAMSIZ; i++) {
- ret |= (outdev[i] ^ arpinfo->outiface[i])
- & arpinfo->outiface_mask[i];
- }
+ ret = ifname_compare(outdev, arpinfo->outiface, arpinfo->outiface_mask);
if (FWINV(ret != 0, ARPT_INV_VIA_OUT)) {
dprintf("VIA out mismatch (%s vs %s).%s\n",
const struct net_device *out,
struct xt_table *table)
{
- static const char nulldevname[IFNAMSIZ];
+ static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
unsigned int verdict = NF_DROP;
const struct arphdr *arp;
bool hotdrop = false;
indev = in ? in->name : nulldevname;
outdev = out ? out->name : nulldevname;
- read_lock_bh(&table->lock);
- private = table->private;
- table_base = (void *)private->entries[smp_processor_id()];
+ rcu_read_lock();
+ private = rcu_dereference(table->private);
+ table_base = rcu_dereference(private->entries[smp_processor_id()]);
+
e = get_entry(table_base, private->hook_entry[hook]);
back = get_entry(table_base, private->underflow[hook]);
e = (void *)e + e->next_offset;
}
} while (!hotdrop);
- read_unlock_bh(&table->lock);
+
+ rcu_read_unlock();
if (hotdrop)
return NF_DROP;
}
}
-static inline struct xt_counters *alloc_counters(struct xt_table *table)
+
+/* We're lazy, and add to the first CPU; overflow works its fey magic
+ * and everything is OK. */
+static int
+add_counter_to_entry(struct arpt_entry *e,
+ const struct xt_counters addme[],
+ unsigned int *i)
+{
+ ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt);
+
+ (*i)++;
+ return 0;
+}
+
+/* Take values from counters and add them back onto the current cpu */
+static void put_counters(struct xt_table_info *t,
+ const struct xt_counters counters[])
+{
+ unsigned int i, cpu;
+
+ local_bh_disable();
+ cpu = smp_processor_id();
+ i = 0;
+ ARPT_ENTRY_ITERATE(t->entries[cpu],
+ t->size,
+ add_counter_to_entry,
+ counters,
+ &i);
+ local_bh_enable();
+}
+
+static inline int
+zero_entry_counter(struct arpt_entry *e, void *arg)
+{
+ e->counters.bcnt = 0;
+ e->counters.pcnt = 0;
+ return 0;
+}
+
+static void
+clone_counters(struct xt_table_info *newinfo, const struct xt_table_info *info)
+{
+ unsigned int cpu;
+ const void *loc_cpu_entry = info->entries[raw_smp_processor_id()];
+
+ memcpy(newinfo, info, offsetof(struct xt_table_info, entries));
+ for_each_possible_cpu(cpu) {
+ memcpy(newinfo->entries[cpu], loc_cpu_entry, info->size);
+ ARPT_ENTRY_ITERATE(newinfo->entries[cpu], newinfo->size,
+ zero_entry_counter, NULL);
+ }
+}
+
+static struct xt_counters *alloc_counters(struct xt_table *table)
{
unsigned int countersize;
struct xt_counters *counters;
- const struct xt_table_info *private = table->private;
+ struct xt_table_info *private = table->private;
+ struct xt_table_info *info;
/* We need atomic snapshot of counters: rest doesn't change
* (other than comefrom, which userspace doesn't care
counters = vmalloc_node(countersize, numa_node_id());
if (counters == NULL)
- return ERR_PTR(-ENOMEM);
+ goto nomem;
+
+ info = xt_alloc_table_info(private->size);
+ if (!info)
+ goto free_counters;
+
+ clone_counters(info, private);
+
+ mutex_lock(&table->lock);
+ xt_table_entry_swap_rcu(private, info);
+ synchronize_net(); /* Wait until smoke has cleared */
+
+ get_counters(info, counters);
+ put_counters(private, counters);
+ mutex_unlock(&table->lock);
- /* First, sum counters... */
- write_lock_bh(&table->lock);
- get_counters(private, counters);
- write_unlock_bh(&table->lock);
+ xt_free_table_info(info);
return counters;
+
+ free_counters:
+ vfree(counters);
+ nomem:
+ return ERR_PTR(-ENOMEM);
}
static int copy_entries_to_user(unsigned int total_size,
return ret;
}
-/* We're lazy, and add to the first CPU; overflow works its fey magic
- * and everything is OK.
- */
-static inline int add_counter_to_entry(struct arpt_entry *e,
- const struct xt_counters addme[],
- unsigned int *i)
-{
-
- ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt);
-
- (*i)++;
- return 0;
-}
-
static int do_add_counters(struct net *net, void __user *user, unsigned int len,
int compat)
{
goto free;
}
- write_lock_bh(&t->lock);
+ mutex_lock(&t->lock);
private = t->private;
if (private->number != num_counters) {
ret = -EINVAL;
goto unlock_up_free;
}
+ preempt_disable();
i = 0;
/* Choose the copy that is on our node */
loc_cpu_entry = private->entries[smp_processor_id()];
add_counter_to_entry,
paddc,
&i);
+ preempt_enable();
unlock_up_free:
- write_unlock_bh(&t->lock);
+ mutex_unlock(&t->lock);
+
xt_table_unlock(t);
module_put(t->me);
free:
static struct xt_table packet_filter = {
.name = "filter",
.valid_hooks = FILTER_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(packet_filter.lock),
- .private = NULL,
.me = THIS_MODULE,
.af = NFPROTO_ARP,
};
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/security.h>
+#include <linux/net.h>
#include <linux/mutex.h>
#include <net/net_namespace.h>
#include <net/sock.h>
MODULE_DESCRIPTION("IPv4 packet queue handler");
MODULE_AUTHOR("James Morris <jmorris@intercode.com.au>");
MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_FIREWALL);
module_init(ip_queue_init);
module_exit(ip_queue_fini);
Hence the start of any table is given by get_table() below. */
+static unsigned long ifname_compare(const char *_a, const char *_b,
+ const unsigned char *_mask)
+{
+ const unsigned long *a = (const unsigned long *)_a;
+ const unsigned long *b = (const unsigned long *)_b;
+ const unsigned long *mask = (const unsigned long *)_mask;
+ unsigned long ret;
+
+ ret = (a[0] ^ b[0]) & mask[0];
+ if (IFNAMSIZ > sizeof(unsigned long))
+ ret |= (a[1] ^ b[1]) & mask[1];
+ if (IFNAMSIZ > 2 * sizeof(unsigned long))
+ ret |= (a[2] ^ b[2]) & mask[2];
+ if (IFNAMSIZ > 3 * sizeof(unsigned long))
+ ret |= (a[3] ^ b[3]) & mask[3];
+ BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
+ return ret;
+}
+
/* Returns whether matches rule or not. */
/* Performance critical - called for every packet */
static inline bool
const struct ipt_ip *ipinfo,
int isfrag)
{
- size_t i;
unsigned long ret;
#define FWINV(bool, invflg) ((bool) ^ !!(ipinfo->invflags & (invflg)))
return false;
}
- /* Look for ifname matches; this should unroll nicely. */
- for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
- ret |= (((const unsigned long *)indev)[i]
- ^ ((const unsigned long *)ipinfo->iniface)[i])
- & ((const unsigned long *)ipinfo->iniface_mask)[i];
- }
+ ret = ifname_compare(indev, ipinfo->iniface, ipinfo->iniface_mask);
if (FWINV(ret != 0, IPT_INV_VIA_IN)) {
dprintf("VIA in mismatch (%s vs %s).%s\n",
return false;
}
- for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
- ret |= (((const unsigned long *)outdev)[i]
- ^ ((const unsigned long *)ipinfo->outiface)[i])
- & ((const unsigned long *)ipinfo->outiface_mask)[i];
- }
+ ret = ifname_compare(outdev, ipinfo->outiface, ipinfo->outiface_mask);
if (FWINV(ret != 0, IPT_INV_VIA_OUT)) {
dprintf("VIA out mismatch (%s vs %s).%s\n",
mtpar.family = tgpar.family = NFPROTO_IPV4;
tgpar.hooknum = hook;
- read_lock_bh(&table->lock);
IP_NF_ASSERT(table->valid_hooks & (1 << hook));
- private = table->private;
- table_base = (void *)private->entries[smp_processor_id()];
+
+ rcu_read_lock();
+ private = rcu_dereference(table->private);
+ table_base = rcu_dereference(private->entries[smp_processor_id()]);
+
e = get_entry(table_base, private->hook_entry[hook]);
/* For return from builtin chain */
}
} while (!hotdrop);
- read_unlock_bh(&table->lock);
+ rcu_read_unlock();
#ifdef DEBUG_ALLOW_ALL
return NF_ACCEPT;
counters,
&i);
}
+
+}
+
+/* We're lazy, and add to the first CPU; overflow works its fey magic
+ * and everything is OK. */
+static int
+add_counter_to_entry(struct ipt_entry *e,
+ const struct xt_counters addme[],
+ unsigned int *i)
+{
+ ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt);
+
+ (*i)++;
+ return 0;
+}
+
+/* Take values from counters and add them back onto the current cpu */
+static void put_counters(struct xt_table_info *t,
+ const struct xt_counters counters[])
+{
+ unsigned int i, cpu;
+
+ local_bh_disable();
+ cpu = smp_processor_id();
+ i = 0;
+ IPT_ENTRY_ITERATE(t->entries[cpu],
+ t->size,
+ add_counter_to_entry,
+ counters,
+ &i);
+ local_bh_enable();
+}
+
+
+static inline int
+zero_entry_counter(struct ipt_entry *e, void *arg)
+{
+ e->counters.bcnt = 0;
+ e->counters.pcnt = 0;
+ return 0;
+}
+
+static void
+clone_counters(struct xt_table_info *newinfo, const struct xt_table_info *info)
+{
+ unsigned int cpu;
+ const void *loc_cpu_entry = info->entries[raw_smp_processor_id()];
+
+ memcpy(newinfo, info, offsetof(struct xt_table_info, entries));
+ for_each_possible_cpu(cpu) {
+ memcpy(newinfo->entries[cpu], loc_cpu_entry, info->size);
+ IPT_ENTRY_ITERATE(newinfo->entries[cpu], newinfo->size,
+ zero_entry_counter, NULL);
+ }
}
static struct xt_counters * alloc_counters(struct xt_table *table)
{
unsigned int countersize;
struct xt_counters *counters;
- const struct xt_table_info *private = table->private;
+ struct xt_table_info *private = table->private;
+ struct xt_table_info *info;
/* We need atomic snapshot of counters: rest doesn't change
(other than comefrom, which userspace doesn't care
counters = vmalloc_node(countersize, numa_node_id());
if (counters == NULL)
- return ERR_PTR(-ENOMEM);
+ goto nomem;
+
+ info = xt_alloc_table_info(private->size);
+ if (!info)
+ goto free_counters;
- /* First, sum counters... */
- write_lock_bh(&table->lock);
- get_counters(private, counters);
- write_unlock_bh(&table->lock);
+ clone_counters(info, private);
+
+ mutex_lock(&table->lock);
+ xt_table_entry_swap_rcu(private, info);
+ synchronize_net(); /* Wait until smoke has cleared */
+
+ get_counters(info, counters);
+ put_counters(private, counters);
+ mutex_unlock(&table->lock);
+
+ xt_free_table_info(info);
return counters;
+
+ free_counters:
+ vfree(counters);
+ nomem:
+ return ERR_PTR(-ENOMEM);
}
static int
return ret;
}
-/* We're lazy, and add to the first CPU; overflow works its fey magic
- * and everything is OK. */
-static int
-add_counter_to_entry(struct ipt_entry *e,
- const struct xt_counters addme[],
- unsigned int *i)
-{
-#if 0
- duprintf("add_counter: Entry %u %lu/%lu + %lu/%lu\n",
- *i,
- (long unsigned int)e->counters.pcnt,
- (long unsigned int)e->counters.bcnt,
- (long unsigned int)addme[*i].pcnt,
- (long unsigned int)addme[*i].bcnt);
-#endif
-
- ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt);
-
- (*i)++;
- return 0;
-}
static int
do_add_counters(struct net *net, void __user *user, unsigned int len, int compat)
goto free;
}
- write_lock_bh(&t->lock);
+ mutex_lock(&t->lock);
private = t->private;
if (private->number != num_counters) {
ret = -EINVAL;
goto unlock_up_free;
}
+ preempt_disable();
i = 0;
/* Choose the copy that is on our node */
loc_cpu_entry = private->entries[raw_smp_processor_id()];
add_counter_to_entry,
paddc,
&i);
+ preempt_enable();
unlock_up_free:
- write_unlock_bh(&t->lock);
+ mutex_unlock(&t->lock);
xt_table_unlock(t);
module_put(t->me);
free:
.me = THIS_MODULE,
};
-static const struct nf_logger ipt_log_logger ={
+static struct nf_logger ipt_log_logger __read_mostly = {
.name = "ipt_LOG",
.logfn = &ipt_log_packet,
.me = THIS_MODULE,
+++ /dev/null
-/* TTL modification target for IP tables
- * (C) 2000,2005 by Harald Welte <laforge@netfilter.org>
- *
- * 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.
- *
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <net/checksum.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv4/ipt_TTL.h>
-
-MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
-MODULE_DESCRIPTION("Xtables: IPv4 TTL field modification target");
-MODULE_LICENSE("GPL");
-
-static unsigned int
-ttl_tg(struct sk_buff *skb, const struct xt_target_param *par)
-{
- struct iphdr *iph;
- const struct ipt_TTL_info *info = par->targinfo;
- int new_ttl;
-
- if (!skb_make_writable(skb, skb->len))
- return NF_DROP;
-
- iph = ip_hdr(skb);
-
- switch (info->mode) {
- case IPT_TTL_SET:
- new_ttl = info->ttl;
- break;
- case IPT_TTL_INC:
- new_ttl = iph->ttl + info->ttl;
- if (new_ttl > 255)
- new_ttl = 255;
- break;
- case IPT_TTL_DEC:
- new_ttl = iph->ttl - info->ttl;
- if (new_ttl < 0)
- new_ttl = 0;
- break;
- default:
- new_ttl = iph->ttl;
- break;
- }
-
- if (new_ttl != iph->ttl) {
- csum_replace2(&iph->check, htons(iph->ttl << 8),
- htons(new_ttl << 8));
- iph->ttl = new_ttl;
- }
-
- return XT_CONTINUE;
-}
-
-static bool ttl_tg_check(const struct xt_tgchk_param *par)
-{
- const struct ipt_TTL_info *info = par->targinfo;
-
- if (info->mode > IPT_TTL_MAXMODE) {
- printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n",
- info->mode);
- return false;
- }
- if (info->mode != IPT_TTL_SET && info->ttl == 0)
- return false;
- return true;
-}
-
-static struct xt_target ttl_tg_reg __read_mostly = {
- .name = "TTL",
- .family = NFPROTO_IPV4,
- .target = ttl_tg,
- .targetsize = sizeof(struct ipt_TTL_info),
- .table = "mangle",
- .checkentry = ttl_tg_check,
- .me = THIS_MODULE,
-};
-
-static int __init ttl_tg_init(void)
-{
- return xt_register_target(&ttl_tg_reg);
-}
-
-static void __exit ttl_tg_exit(void)
-{
- xt_unregister_target(&ttl_tg_reg);
-}
-
-module_init(ttl_tg_init);
-module_exit(ttl_tg_exit);
.me = THIS_MODULE,
};
-static struct nf_logger ipt_ulog_logger = {
+static struct nf_logger ipt_ulog_logger __read_mostly = {
.name = "ipt_ULOG",
.logfn = ipt_logfn,
.me = THIS_MODULE,
+++ /dev/null
-/* IP tables module for matching the value of the TTL
- *
- * (C) 2000,2001 by Harald Welte <laforge@netfilter.org>
- *
- * 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.
- */
-
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-
-#include <linux/netfilter_ipv4/ipt_ttl.h>
-#include <linux/netfilter/x_tables.h>
-
-MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
-MODULE_DESCRIPTION("Xtables: IPv4 TTL field match");
-MODULE_LICENSE("GPL");
-
-static bool ttl_mt(const struct sk_buff *skb, const struct xt_match_param *par)
-{
- const struct ipt_ttl_info *info = par->matchinfo;
- const u8 ttl = ip_hdr(skb)->ttl;
-
- switch (info->mode) {
- case IPT_TTL_EQ:
- return ttl == info->ttl;
- case IPT_TTL_NE:
- return ttl != info->ttl;
- case IPT_TTL_LT:
- return ttl < info->ttl;
- case IPT_TTL_GT:
- return ttl > info->ttl;
- default:
- printk(KERN_WARNING "ipt_ttl: unknown mode %d\n",
- info->mode);
- return false;
- }
-
- return false;
-}
-
-static struct xt_match ttl_mt_reg __read_mostly = {
- .name = "ttl",
- .family = NFPROTO_IPV4,
- .match = ttl_mt,
- .matchsize = sizeof(struct ipt_ttl_info),
- .me = THIS_MODULE,
-};
-
-static int __init ttl_mt_init(void)
-{
- return xt_register_match(&ttl_mt_reg);
-}
-
-static void __exit ttl_mt_exit(void)
-{
- xt_unregister_match(&ttl_mt_reg);
-}
-
-module_init(ttl_mt_init);
-module_exit(ttl_mt_exit);
static struct xt_table packet_filter = {
.name = "filter",
.valid_hooks = FILTER_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(packet_filter.lock),
.me = THIS_MODULE,
.af = AF_INET,
};
static struct xt_table packet_mangler = {
.name = "mangle",
.valid_hooks = MANGLE_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(packet_mangler.lock),
.me = THIS_MODULE,
.af = AF_INET,
};
static struct xt_table packet_raw = {
.name = "raw",
.valid_hooks = RAW_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(packet_raw.lock),
.me = THIS_MODULE,
.af = AF_INET,
};
static struct xt_table security_table = {
.name = "security",
.valid_hooks = SECURITY_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(security_table.lock),
.me = THIS_MODULE,
.af = AF_INET,
};
typeof(nf_nat_seq_adjust_hook) seq_adjust;
seq_adjust = rcu_dereference(nf_nat_seq_adjust_hook);
- if (!seq_adjust || !seq_adjust(skb, ct, ctinfo))
+ if (!seq_adjust || !seq_adjust(skb, ct, ctinfo)) {
+ NF_CT_STAT_INC_ATOMIC(nf_ct_net(ct), drop);
return NF_DROP;
+ }
}
out:
/* We've seen it coming out the other side: confirm it */
static struct xt_table nat_table = {
.name = "nat",
.valid_hooks = NAT_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(nat_table.lock),
.me = THIS_MODULE,
.af = AF_INET,
};
To compile it as a module, choose M here. If unsure, say N.
config IP6_NF_MATCH_HL
- tristate '"hl" match support'
+ tristate '"hl" hoplimit match support'
depends on NETFILTER_ADVANCED
- help
- HL matching allows you to match packets based on the hop
- limit of the packet.
-
- To compile it as a module, choose M here. If unsure, say N.
+ select NETFILTER_XT_MATCH_HL
+ ---help---
+ This is a backwards-compat option for the user's convenience
+ (e.g. when running oldconfig). It selects
+ COFNIG_NETFILTER_XT_MATCH_HL.
config IP6_NF_MATCH_IPV6HEADER
tristate '"ipv6header" IPv6 Extension Headers Match'
To compile it as a module, choose M here. If unsure, say N.
# The targets
+config IP6_NF_TARGET_HL
+ tristate '"HL" hoplimit target support'
+ depends on NETFILTER_ADVANCED
+ select NETFILTER_XT_TARGET_HL
+ ---help---
+ This is a backwards-compat option for the user's convenience
+ (e.g. when running oldconfig). It selects
+ COFNIG_NETFILTER_XT_TARGET_HL.
+
config IP6_NF_TARGET_LOG
tristate "LOG target support"
default m if NETFILTER_ADVANCED=n
To compile it as a module, choose M here. If unsure, say N.
-config IP6_NF_TARGET_HL
- tristate 'HL (hoplimit) target support'
- depends on IP6_NF_MANGLE
- depends on NETFILTER_ADVANCED
- help
- This option adds a `HL' target, which enables the user to decrement
- the hoplimit value of the IPv6 header or set it to a given (lower)
- value.
-
- While it is safe to decrement the hoplimit value, this option also
- enables functionality to increment and set the hoplimit value of the
- IPv6 header to arbitrary values. This is EXTREMELY DANGEROUS since
- you can easily create immortal packets that loop forever on the
- network.
-
- To compile it as a module, choose M here. If unsure, say N.
-
config IP6_NF_RAW
tristate 'raw table support (required for TRACE)'
depends on NETFILTER_ADVANCED
obj-$(CONFIG_IP6_NF_MATCH_AH) += ip6t_ah.o
obj-$(CONFIG_IP6_NF_MATCH_EUI64) += ip6t_eui64.o
obj-$(CONFIG_IP6_NF_MATCH_FRAG) += ip6t_frag.o
-obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o
obj-$(CONFIG_IP6_NF_MATCH_IPV6HEADER) += ip6t_ipv6header.o
obj-$(CONFIG_IP6_NF_MATCH_MH) += ip6t_mh.o
obj-$(CONFIG_IP6_NF_MATCH_OPTS) += ip6t_hbh.o
obj-$(CONFIG_IP6_NF_MATCH_RT) += ip6t_rt.o
# targets
-obj-$(CONFIG_IP6_NF_TARGET_HL) += ip6t_HL.o
obj-$(CONFIG_IP6_NF_TARGET_LOG) += ip6t_LOG.o
obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o
MODULE_DESCRIPTION("IPv6 packet queue handler");
MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_IP6_FW);
module_init(ip6_queue_init);
module_exit(ip6_queue_fini);
(nexthdr == IPPROTO_DSTOPTS) );
}
+static unsigned long ifname_compare(const char *_a, const char *_b,
+ const unsigned char *_mask)
+{
+ const unsigned long *a = (const unsigned long *)_a;
+ const unsigned long *b = (const unsigned long *)_b;
+ const unsigned long *mask = (const unsigned long *)_mask;
+ unsigned long ret;
+
+ ret = (a[0] ^ b[0]) & mask[0];
+ if (IFNAMSIZ > sizeof(unsigned long))
+ ret |= (a[1] ^ b[1]) & mask[1];
+ if (IFNAMSIZ > 2 * sizeof(unsigned long))
+ ret |= (a[2] ^ b[2]) & mask[2];
+ if (IFNAMSIZ > 3 * sizeof(unsigned long))
+ ret |= (a[3] ^ b[3]) & mask[3];
+ BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
+ return ret;
+}
+
/* Returns whether matches rule or not. */
/* Performance critical - called for every packet */
static inline bool
unsigned int *protoff,
int *fragoff, bool *hotdrop)
{
- size_t i;
unsigned long ret;
const struct ipv6hdr *ipv6 = ipv6_hdr(skb);
return false;
}
- /* Look for ifname matches; this should unroll nicely. */
- for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
- ret |= (((const unsigned long *)indev)[i]
- ^ ((const unsigned long *)ip6info->iniface)[i])
- & ((const unsigned long *)ip6info->iniface_mask)[i];
- }
+ ret = ifname_compare(indev, ip6info->iniface, ip6info->iniface_mask);
if (FWINV(ret != 0, IP6T_INV_VIA_IN)) {
dprintf("VIA in mismatch (%s vs %s).%s\n",
return false;
}
- for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
- ret |= (((const unsigned long *)outdev)[i]
- ^ ((const unsigned long *)ip6info->outiface)[i])
- & ((const unsigned long *)ip6info->outiface_mask)[i];
- }
+ ret = ifname_compare(outdev, ip6info->outiface, ip6info->outiface_mask);
if (FWINV(ret != 0, IP6T_INV_VIA_OUT)) {
dprintf("VIA out mismatch (%s vs %s).%s\n",
mtpar.family = tgpar.family = NFPROTO_IPV6;
tgpar.hooknum = hook;
- read_lock_bh(&table->lock);
IP_NF_ASSERT(table->valid_hooks & (1 << hook));
- private = table->private;
- table_base = (void *)private->entries[smp_processor_id()];
+
+ rcu_read_lock();
+ private = rcu_dereference(table->private);
+ table_base = rcu_dereference(private->entries[smp_processor_id()]);
+
e = get_entry(table_base, private->hook_entry[hook]);
/* For return from builtin chain */
#ifdef CONFIG_NETFILTER_DEBUG
((struct ip6t_entry *)table_base)->comefrom = NETFILTER_LINK_POISON;
#endif
- read_unlock_bh(&table->lock);
+ rcu_read_unlock();
#ifdef DEBUG_ALLOW_ALL
return NF_ACCEPT;
}
}
+/* We're lazy, and add to the first CPU; overflow works its fey magic
+ * and everything is OK. */
+static int
+add_counter_to_entry(struct ip6t_entry *e,
+ const struct xt_counters addme[],
+ unsigned int *i)
+{
+ ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt);
+
+ (*i)++;
+ return 0;
+}
+
+/* Take values from counters and add them back onto the current cpu */
+static void put_counters(struct xt_table_info *t,
+ const struct xt_counters counters[])
+{
+ unsigned int i, cpu;
+
+ local_bh_disable();
+ cpu = smp_processor_id();
+ i = 0;
+ IP6T_ENTRY_ITERATE(t->entries[cpu],
+ t->size,
+ add_counter_to_entry,
+ counters,
+ &i);
+ local_bh_enable();
+}
+
+static inline int
+zero_entry_counter(struct ip6t_entry *e, void *arg)
+{
+ e->counters.bcnt = 0;
+ e->counters.pcnt = 0;
+ return 0;
+}
+
+static void
+clone_counters(struct xt_table_info *newinfo, const struct xt_table_info *info)
+{
+ unsigned int cpu;
+ const void *loc_cpu_entry = info->entries[raw_smp_processor_id()];
+
+ memcpy(newinfo, info, offsetof(struct xt_table_info, entries));
+ for_each_possible_cpu(cpu) {
+ memcpy(newinfo->entries[cpu], loc_cpu_entry, info->size);
+ IP6T_ENTRY_ITERATE(newinfo->entries[cpu], newinfo->size,
+ zero_entry_counter, NULL);
+ }
+}
+
static struct xt_counters *alloc_counters(struct xt_table *table)
{
unsigned int countersize;
struct xt_counters *counters;
- const struct xt_table_info *private = table->private;
+ struct xt_table_info *private = table->private;
+ struct xt_table_info *info;
/* We need atomic snapshot of counters: rest doesn't change
(other than comefrom, which userspace doesn't care
counters = vmalloc_node(countersize, numa_node_id());
if (counters == NULL)
- return ERR_PTR(-ENOMEM);
+ goto nomem;
+
+ info = xt_alloc_table_info(private->size);
+ if (!info)
+ goto free_counters;
+
+ clone_counters(info, private);
- /* First, sum counters... */
- write_lock_bh(&table->lock);
- get_counters(private, counters);
- write_unlock_bh(&table->lock);
+ mutex_lock(&table->lock);
+ xt_table_entry_swap_rcu(private, info);
+ synchronize_net(); /* Wait until smoke has cleared */
- return counters;
+ get_counters(info, counters);
+ put_counters(private, counters);
+ mutex_unlock(&table->lock);
+
+ xt_free_table_info(info);
+
+ free_counters:
+ vfree(counters);
+ nomem:
+ return ERR_PTR(-ENOMEM);
}
static int
return ret;
}
-/* We're lazy, and add to the first CPU; overflow works its fey magic
- * and everything is OK. */
-static inline int
-add_counter_to_entry(struct ip6t_entry *e,
- const struct xt_counters addme[],
- unsigned int *i)
-{
-#if 0
- duprintf("add_counter: Entry %u %lu/%lu + %lu/%lu\n",
- *i,
- (long unsigned int)e->counters.pcnt,
- (long unsigned int)e->counters.bcnt,
- (long unsigned int)addme[*i].pcnt,
- (long unsigned int)addme[*i].bcnt);
-#endif
-
- ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt);
-
- (*i)++;
- return 0;
-}
-
static int
do_add_counters(struct net *net, void __user *user, unsigned int len,
int compat)
goto free;
}
- write_lock_bh(&t->lock);
+ mutex_lock(&t->lock);
private = t->private;
if (private->number != num_counters) {
ret = -EINVAL;
goto unlock_up_free;
}
+ preempt_disable();
i = 0;
/* Choose the copy that is on our node */
loc_cpu_entry = private->entries[raw_smp_processor_id()];
add_counter_to_entry,
paddc,
&i);
+ preempt_enable();
unlock_up_free:
- write_unlock_bh(&t->lock);
+ mutex_unlock(&t->lock);
xt_table_unlock(t);
module_put(t->me);
free:
+++ /dev/null
-/*
- * Hop Limit modification target for ip6tables
- * Maciej Soltysiak <solt@dns.toxicfilms.tv>
- * Based on HW's TTL module
- *
- * This software is distributed under the terms of GNU GPL
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv6/ip6t_HL.h>
-
-MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
-MODULE_DESCRIPTION("Xtables: IPv6 Hop Limit field modification target");
-MODULE_LICENSE("GPL");
-
-static unsigned int
-hl_tg6(struct sk_buff *skb, const struct xt_target_param *par)
-{
- struct ipv6hdr *ip6h;
- const struct ip6t_HL_info *info = par->targinfo;
- int new_hl;
-
- if (!skb_make_writable(skb, skb->len))
- return NF_DROP;
-
- ip6h = ipv6_hdr(skb);
-
- switch (info->mode) {
- case IP6T_HL_SET:
- new_hl = info->hop_limit;
- break;
- case IP6T_HL_INC:
- new_hl = ip6h->hop_limit + info->hop_limit;
- if (new_hl > 255)
- new_hl = 255;
- break;
- case IP6T_HL_DEC:
- new_hl = ip6h->hop_limit - info->hop_limit;
- if (new_hl < 0)
- new_hl = 0;
- break;
- default:
- new_hl = ip6h->hop_limit;
- break;
- }
-
- ip6h->hop_limit = new_hl;
-
- return XT_CONTINUE;
-}
-
-static bool hl_tg6_check(const struct xt_tgchk_param *par)
-{
- const struct ip6t_HL_info *info = par->targinfo;
-
- if (info->mode > IP6T_HL_MAXMODE) {
- printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
- info->mode);
- return false;
- }
- if (info->mode != IP6T_HL_SET && info->hop_limit == 0) {
- printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
- "make sense with value 0\n");
- return false;
- }
- return true;
-}
-
-static struct xt_target hl_tg6_reg __read_mostly = {
- .name = "HL",
- .family = NFPROTO_IPV6,
- .target = hl_tg6,
- .targetsize = sizeof(struct ip6t_HL_info),
- .table = "mangle",
- .checkentry = hl_tg6_check,
- .me = THIS_MODULE
-};
-
-static int __init hl_tg6_init(void)
-{
- return xt_register_target(&hl_tg6_reg);
-}
-
-static void __exit hl_tg6_exit(void)
-{
- xt_unregister_target(&hl_tg6_reg);
-}
-
-module_init(hl_tg6_init);
-module_exit(hl_tg6_exit);
.me = THIS_MODULE,
};
-static const struct nf_logger ip6t_logger = {
+static struct nf_logger ip6t_logger __read_mostly = {
.name = "ip6t_LOG",
.logfn = &ip6t_log_packet,
.me = THIS_MODULE,
+++ /dev/null
-/* Hop Limit matching module */
-
-/* (C) 2001-2002 Maciej Soltysiak <solt@dns.toxicfilms.tv>
- * Based on HW's ttl module
- *
- * 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.
- */
-
-#include <linux/ipv6.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-
-#include <linux/netfilter_ipv6/ip6t_hl.h>
-#include <linux/netfilter/x_tables.h>
-
-MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
-MODULE_DESCRIPTION("Xtables: IPv6 Hop Limit field match");
-MODULE_LICENSE("GPL");
-
-static bool hl_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
-{
- const struct ip6t_hl_info *info = par->matchinfo;
- const struct ipv6hdr *ip6h = ipv6_hdr(skb);
-
- switch (info->mode) {
- case IP6T_HL_EQ:
- return ip6h->hop_limit == info->hop_limit;
- break;
- case IP6T_HL_NE:
- return ip6h->hop_limit != info->hop_limit;
- break;
- case IP6T_HL_LT:
- return ip6h->hop_limit < info->hop_limit;
- break;
- case IP6T_HL_GT:
- return ip6h->hop_limit > info->hop_limit;
- break;
- default:
- printk(KERN_WARNING "ip6t_hl: unknown mode %d\n",
- info->mode);
- return false;
- }
-
- return false;
-}
-
-static struct xt_match hl_mt6_reg __read_mostly = {
- .name = "hl",
- .family = NFPROTO_IPV6,
- .match = hl_mt6,
- .matchsize = sizeof(struct ip6t_hl_info),
- .me = THIS_MODULE,
-};
-
-static int __init hl_mt6_init(void)
-{
- return xt_register_match(&hl_mt6_reg);
-}
-
-static void __exit hl_mt6_exit(void)
-{
- xt_unregister_match(&hl_mt6_reg);
-}
-
-module_init(hl_mt6_init);
-module_exit(hl_mt6_exit);
static struct xt_table packet_filter = {
.name = "filter",
.valid_hooks = FILTER_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(packet_filter.lock),
.me = THIS_MODULE,
.af = AF_INET6,
};
static struct xt_table packet_mangler = {
.name = "mangle",
.valid_hooks = MANGLE_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(packet_mangler.lock),
.me = THIS_MODULE,
.af = AF_INET6,
};
static struct xt_table packet_raw = {
.name = "raw",
.valid_hooks = RAW_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(packet_raw.lock),
.me = THIS_MODULE,
.af = AF_INET6,
};
static struct xt_table security_table = {
.name = "security",
.valid_hooks = SECURITY_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(security_table.lock),
.me = THIS_MODULE,
.af = AF_INET6,
};
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
static bool ipv6_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
struct nf_conntrack_tuple *tuple)
pr_debug("icmpv6: can't create new conn with type %u\n",
type + 128);
nf_ct_dump_tuple_ipv6(&ct->tuplehash[0].tuple);
+ if (LOG_INVALID(nf_ct_net(ct), IPPROTO_ICMPV6))
+ nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL,
+ "nf_ct_icmpv6: invalid new with type %d ",
+ type + 128);
return false;
}
atomic_set(&ct->proto.icmp.count, 0);
To compile it as a module, choose M here. If unsure, say N.
+config NETFILTER_XT_TARGET_HL
+ tristate '"HL" hoplimit target support'
+ depends on IP_NF_MANGLE || IP6_NF_MANGLE
+ depends on NETFILTER_ADVANCED
+ ---help---
+ This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
+ targets, which enable the user to change the
+ hoplimit/time-to-live value of the IP header.
+
+ While it is safe to decrement the hoplimit/TTL value, the
+ modules also allow to increment and set the hoplimit value of
+ the header to arbitrary values. This is EXTREMELY DANGEROUS
+ since you can easily create immortal packets that loop
+ forever on the network.
+
+config NETFILTER_XT_TARGET_LED
+ tristate '"LED" target support'
+ depends on LEDS_CLASS
+ depends on NETFILTER_ADVANCED
+ help
+ This option adds a `LED' target, which allows you to blink LEDs in
+ response to particular packets passing through your machine.
+
+ This can be used to turn a spare LED into a network activity LED,
+ which only flashes in response to FTP transfers, for example. Or
+ you could have an LED which lights up for a minute or two every time
+ somebody connects to your machine via SSH.
+
+ You will need support for the "led" class to make this work.
+
+ To create an LED trigger for incoming SSH traffic:
+ iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
+
+ Then attach the new trigger to an LED on your system:
+ echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
+
+ For more information on the LEDs available on your system, see
+ Documentation/leds-class.txt
+
config NETFILTER_XT_TARGET_MARK
tristate '"MARK" target support'
default m if NETFILTER_ADVANCED=n
This option adds a "TCPOPTSTRIP" target, which allows you to strip
TCP options from TCP packets.
+config NETFILTER_XT_MATCH_CLUSTER
+ tristate '"cluster" match support'
+ depends on NF_CONNTRACK
+ depends on NETFILTER_ADVANCED
+ ---help---
+ This option allows you to build work-load-sharing clusters of
+ network servers/stateful firewalls without having a dedicated
+ load-balancing router/server/switch. Basically, this match returns
+ true when the packet must be handled by this cluster node. Thus,
+ all nodes see all packets and this match decides which node handles
+ what packets. The work-load sharing algorithm is based on source
+ address hashing.
+
+ If you say Y or M here, try `iptables -m cluster --help` for
+ more information.
+
config NETFILTER_XT_MATCH_COMMENT
tristate '"comment" match support'
depends on NETFILTER_ADVANCED
To compile it as a module, choose M here. If unsure, say Y.
+config NETFILTER_XT_MATCH_HL
+ tristate '"hl" hoplimit/TTL match support'
+ depends on NETFILTER_ADVANCED
+ ---help---
+ HL matching allows you to match packets based on the hoplimit
+ in the IPv6 header, or the time-to-live field in the IPv4
+ header of the packet.
+
config NETFILTER_XT_MATCH_IPRANGE
tristate '"iprange" address range match support'
depends on NETFILTER_ADVANCED
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMARK) += xt_CONNMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_HL) += xt_HL.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TRACE) += xt_TRACE.o
# matches
+obj-$(CONFIG_NETFILTER_XT_MATCH_CLUSTER) += xt_cluster.o
obj-$(CONFIG_NETFILTER_XT_MATCH_COMMENT) += xt_comment.o
obj-$(CONFIG_NETFILTER_XT_MATCH_CONNBYTES) += xt_connbytes.o
obj-$(CONFIG_NETFILTER_XT_MATCH_CONNLIMIT) += xt_connlimit.o
obj-$(CONFIG_NETFILTER_XT_MATCH_ESP) += xt_esp.o
obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o
obj-$(CONFIG_NETFILTER_XT_MATCH_HELPER) += xt_helper.o
+obj-$(CONFIG_NETFILTER_XT_MATCH_HL) += xt_hl.o
obj-$(CONFIG_NETFILTER_XT_MATCH_IPRANGE) += xt_iprange.o
obj-$(CONFIG_NETFILTER_XT_MATCH_LENGTH) += xt_length.o
obj-$(CONFIG_NETFILTER_XT_MATCH_LIMIT) += xt_limit.o
outdev, &elem, okfn, hook_thresh);
if (verdict == NF_ACCEPT || verdict == NF_STOP) {
ret = 1;
- goto unlock;
} else if (verdict == NF_DROP) {
kfree_skb(skb);
ret = -EPERM;
verdict >> NF_VERDICT_BITS))
goto next_hook;
}
-unlock:
rcu_read_unlock();
return ret;
}
unsigned int nf_conntrack_htable_size __read_mostly;
EXPORT_SYMBOL_GPL(nf_conntrack_htable_size);
-int nf_conntrack_max __read_mostly;
+unsigned int nf_conntrack_max __read_mostly;
EXPORT_SYMBOL_GPL(nf_conntrack_max);
struct nf_conn nf_conntrack_untracked __read_mostly;
struct nf_conn *ct;
if (unlikely(!nf_conntrack_hash_rnd_initted)) {
- get_random_bytes(&nf_conntrack_hash_rnd, 4);
+ get_random_bytes(&nf_conntrack_hash_rnd,
+ sizeof(nf_conntrack_hash_rnd));
nf_conntrack_hash_rnd_initted = 1;
}
static void nf_conntrack_free_rcu(struct rcu_head *head)
{
struct nf_conn *ct = container_of(head, struct nf_conn, rcu);
- struct net *net = nf_ct_net(ct);
nf_ct_ext_free(ct);
kmem_cache_free(nf_conntrack_cachep, ct);
- atomic_dec(&net->ct.count);
}
void nf_conntrack_free(struct nf_conn *ct)
{
+ struct net *net = nf_ct_net(ct);
+
nf_ct_ext_destroy(ct);
+ atomic_dec(&net->ct.count);
call_rcu(&ct->rcu, nf_conntrack_free_rcu);
}
EXPORT_SYMBOL_GPL(nf_conntrack_free);
nf_conntrack_put(skb->nfct);
skb->nfct = NULL;
NF_CT_STAT_INC_ATOMIC(net, invalid);
+ if (ret == -NF_DROP)
+ NF_CT_STAT_INC_ATOMIC(net, drop);
return -ret;
}
/* We have to rehahs for the new table anyway, so we also can
* use a newrandom seed */
- get_random_bytes(&rnd, 4);
+ get_random_bytes(&rnd, sizeof(rnd));
/* Lookups in the old hash might happen in parallel, which means we
* might get false negatives during connection lookup. New connections
unsigned int hash;
if (unlikely(!nf_ct_expect_hash_rnd_initted)) {
- get_random_bytes(&nf_ct_expect_hash_rnd, 4);
+ get_random_bytes(&nf_ct_expect_hash_rnd,
+ sizeof(nf_ct_expect_hash_rnd));
nf_ct_expect_hash_rnd_initted = 1;
}
nla_put_failure:
rcu_read_unlock();
nlmsg_failure:
+ nfnetlink_set_err(0, group, -ENOBUFS);
kfree_skb(skb);
return NOTIFY_DONE;
}
nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
- l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
+ rcu_read_lock();
+ l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
if (likely(l3proto->nlattr_to_tuple)) {
ret = nla_validate_nested(attr, CTA_IP_MAX,
ret = l3proto->nlattr_to_tuple(tb, tuple);
}
- nf_ct_l3proto_put(l3proto);
+ rcu_read_unlock();
return ret;
}
return -EINVAL;
tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
- l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum);
+ rcu_read_lock();
+ l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
if (likely(l4proto->nlattr_to_tuple)) {
ret = nla_validate_nested(attr, CTA_PROTO_MAX,
ret = l4proto->nlattr_to_tuple(tb, tuple);
}
- nf_ct_l4proto_put(l4proto);
+ rcu_read_unlock();
return ret;
}
nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL);
- l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct));
+ rcu_read_lock();
+ l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
if (l4proto->from_nlattr)
err = l4proto->from_nlattr(tb, ct);
- nf_ct_l4proto_put(l4proto);
+ rcu_read_unlock();
return err;
}
{
int err;
+ /* only allow NAT changes and master assignation for new conntracks */
+ if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
+ return -EOPNOTSUPP;
+
if (cda[CTA_HELP]) {
err = ctnetlink_change_helper(ct, cda);
if (err < 0)
report);
}
-static int
+static struct nf_conn *
ctnetlink_create_conntrack(struct nlattr *cda[],
struct nf_conntrack_tuple *otuple,
struct nf_conntrack_tuple *rtuple,
- struct nf_conn *master_ct,
- u32 pid,
- int report)
+ u8 u3)
{
struct nf_conn *ct;
int err = -EINVAL;
ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC);
if (IS_ERR(ct))
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
if (!cda[CTA_TIMEOUT])
- goto err;
+ goto err1;
ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
char *helpname;
err = ctnetlink_parse_help(cda[CTA_HELP], &helpname);
- if (err < 0) {
- rcu_read_unlock();
- goto err;
- }
+ if (err < 0)
+ goto err2;
helper = __nf_conntrack_helper_find_byname(helpname);
if (helper == NULL) {
#ifdef CONFIG_MODULES
if (request_module("nfct-helper-%s", helpname) < 0) {
err = -EOPNOTSUPP;
- goto err;
+ goto err1;
}
rcu_read_lock();
helper = __nf_conntrack_helper_find_byname(helpname);
if (helper) {
- rcu_read_unlock();
err = -EAGAIN;
- goto err;
+ goto err2;
}
rcu_read_unlock();
#endif
err = -EOPNOTSUPP;
- goto err;
+ goto err1;
} else {
struct nf_conn_help *help;
help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
if (help == NULL) {
- rcu_read_unlock();
err = -ENOMEM;
- goto err;
+ goto err2;
}
/* not in hash table yet so not strictly necessary */
} else {
/* try an implicit helper assignation */
err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC);
- if (err < 0) {
- rcu_read_unlock();
- goto err;
- }
+ if (err < 0)
+ goto err2;
}
if (cda[CTA_STATUS]) {
err = ctnetlink_change_status(ct, cda);
- if (err < 0) {
- rcu_read_unlock();
- goto err;
- }
+ if (err < 0)
+ goto err2;
}
if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
err = ctnetlink_change_nat(ct, cda);
- if (err < 0) {
- rcu_read_unlock();
- goto err;
- }
+ if (err < 0)
+ goto err2;
}
#ifdef CONFIG_NF_NAT_NEEDED
if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
err = ctnetlink_change_nat_seq_adj(ct, cda);
- if (err < 0) {
- rcu_read_unlock();
- goto err;
- }
+ if (err < 0)
+ goto err2;
}
#endif
if (cda[CTA_PROTOINFO]) {
err = ctnetlink_change_protoinfo(ct, cda);
- if (err < 0) {
- rcu_read_unlock();
- goto err;
- }
+ if (err < 0)
+ goto err2;
}
nf_ct_acct_ext_add(ct, GFP_ATOMIC);
#endif
/* setup master conntrack: this is a confirmed expectation */
- if (master_ct) {
+ if (cda[CTA_TUPLE_MASTER]) {
+ struct nf_conntrack_tuple master;
+ struct nf_conntrack_tuple_hash *master_h;
+ struct nf_conn *master_ct;
+
+ err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3);
+ if (err < 0)
+ goto err2;
+
+ master_h = __nf_conntrack_find(&init_net, &master);
+ if (master_h == NULL) {
+ err = -ENOENT;
+ goto err2;
+ }
+ master_ct = nf_ct_tuplehash_to_ctrack(master_h);
+ nf_conntrack_get(&master_ct->ct_general);
__set_bit(IPS_EXPECTED_BIT, &ct->status);
ct->master = master_ct;
}
- nf_conntrack_get(&ct->ct_general);
add_timer(&ct->timeout);
nf_conntrack_hash_insert(ct);
rcu_read_unlock();
- ctnetlink_event_report(ct, pid, report);
- nf_ct_put(ct);
- return 0;
+ return ct;
-err:
+err2:
+ rcu_read_unlock();
+err1:
nf_conntrack_free(ct);
- return err;
+ return ERR_PTR(err);
}
static int
h = __nf_conntrack_find(&init_net, &rtuple);
if (h == NULL) {
- struct nf_conntrack_tuple master;
- struct nf_conntrack_tuple_hash *master_h = NULL;
- struct nf_conn *master_ct = NULL;
-
- if (cda[CTA_TUPLE_MASTER]) {
- err = ctnetlink_parse_tuple(cda,
- &master,
- CTA_TUPLE_MASTER,
- u3);
- if (err < 0)
- goto out_unlock;
+ err = -ENOENT;
+ if (nlh->nlmsg_flags & NLM_F_CREATE) {
+ struct nf_conn *ct;
- master_h = __nf_conntrack_find(&init_net, &master);
- if (master_h == NULL) {
- err = -ENOENT;
+ ct = ctnetlink_create_conntrack(cda, &otuple,
+ &rtuple, u3);
+ if (IS_ERR(ct)) {
+ err = PTR_ERR(ct);
goto out_unlock;
}
- master_ct = nf_ct_tuplehash_to_ctrack(master_h);
- nf_conntrack_get(&master_ct->ct_general);
- }
-
- err = -ENOENT;
- if (nlh->nlmsg_flags & NLM_F_CREATE)
- err = ctnetlink_create_conntrack(cda,
- &otuple,
- &rtuple,
- master_ct,
- NETLINK_CB(skb).pid,
- nlmsg_report(nlh));
- spin_unlock_bh(&nf_conntrack_lock);
- if (err < 0 && master_ct)
- nf_ct_put(master_ct);
+ err = 0;
+ nf_conntrack_get(&ct->ct_general);
+ spin_unlock_bh(&nf_conntrack_lock);
+ ctnetlink_event_report(ct,
+ NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
+ nf_ct_put(ct);
+ } else
+ spin_unlock_bh(&nf_conntrack_lock);
return err;
}
if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
- /* we only allow nat config for new conntracks */
- if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
- err = -EOPNOTSUPP;
- goto out_unlock;
- }
- /* can't link an existing conntrack to a master */
- if (cda[CTA_TUPLE_MASTER]) {
- err = -EOPNOTSUPP;
- goto out_unlock;
- }
-
err = ctnetlink_change_conntrack(ct, cda);
if (err == 0) {
nf_conntrack_get(&ct->ct_general);
nla_put_failure:
rcu_read_unlock();
nlmsg_failure:
+ nfnetlink_set_err(0, 0, -ENOBUFS);
kfree_skb(skb);
return NOTIFY_DONE;
}
/* this is guaranteed to always return a valid protocol helper, since
* it falls back to generic_protocol */
-struct nf_conntrack_l4proto *
-nf_ct_l4proto_find_get(u_int16_t l3proto, u_int8_t l4proto)
-{
- struct nf_conntrack_l4proto *p;
-
- rcu_read_lock();
- p = __nf_ct_l4proto_find(l3proto, l4proto);
- if (!try_module_get(p->me))
- p = &nf_conntrack_l4proto_generic;
- rcu_read_unlock();
-
- return p;
-}
-EXPORT_SYMBOL_GPL(nf_ct_l4proto_find_get);
-
-void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p)
-{
- module_put(p->me);
-}
-EXPORT_SYMBOL_GPL(nf_ct_l4proto_put);
-
struct nf_conntrack_l3proto *
nf_ct_l3proto_find_get(u_int16_t l3proto)
{
#include <linux/skbuff.h>
#include <linux/dccp.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+
#include <linux/netfilter/nfnetlink_conntrack.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
static DEFINE_RWLOCK(dccp_lock);
-static int nf_ct_dccp_loose __read_mostly = 1;
-
/* Timeouts are based on values from RFC4340:
*
* - REQUEST:
#define DCCP_MSL (2 * 60 * HZ)
-static unsigned int dccp_timeout[CT_DCCP_MAX + 1] __read_mostly = {
- [CT_DCCP_REQUEST] = 2 * DCCP_MSL,
- [CT_DCCP_RESPOND] = 4 * DCCP_MSL,
- [CT_DCCP_PARTOPEN] = 4 * DCCP_MSL,
- [CT_DCCP_OPEN] = 12 * 3600 * HZ,
- [CT_DCCP_CLOSEREQ] = 64 * HZ,
- [CT_DCCP_CLOSING] = 64 * HZ,
- [CT_DCCP_TIMEWAIT] = 2 * DCCP_MSL,
-};
-
static const char * const dccp_state_names[] = {
[CT_DCCP_NONE] = "NONE",
[CT_DCCP_REQUEST] = "REQUEST",
},
};
+/* this module per-net specifics */
+static int dccp_net_id;
+struct dccp_net {
+ int dccp_loose;
+ unsigned int dccp_timeout[CT_DCCP_MAX + 1];
+#ifdef CONFIG_SYSCTL
+ struct ctl_table_header *sysctl_header;
+ struct ctl_table *sysctl_table;
+#endif
+};
+
+static inline struct dccp_net *dccp_pernet(struct net *net)
+{
+ return net_generic(net, dccp_net_id);
+}
+
static bool dccp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
struct nf_conntrack_tuple *tuple)
{
unsigned int dataoff)
{
struct net *net = nf_ct_net(ct);
+ struct dccp_net *dn;
struct dccp_hdr _dh, *dh;
const char *msg;
u_int8_t state;
state = dccp_state_table[CT_DCCP_ROLE_CLIENT][dh->dccph_type][CT_DCCP_NONE];
switch (state) {
default:
- if (nf_ct_dccp_loose == 0) {
+ dn = dccp_pernet(net);
+ if (dn->dccp_loose == 0) {
msg = "nf_ct_dccp: not picking up existing connection ";
goto out_invalid;
}
u_int8_t pf, unsigned int hooknum)
{
struct net *net = nf_ct_net(ct);
+ struct dccp_net *dn;
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
struct dccp_hdr _dh, *dh;
u_int8_t type, old_state, new_state;
ct->proto.dccp.last_pkt = type;
ct->proto.dccp.state = new_state;
write_unlock_bh(&dccp_lock);
- nf_ct_refresh_acct(ct, ctinfo, skb, dccp_timeout[new_state]);
+
+ dn = dccp_pernet(net);
+ nf_ct_refresh_acct(ct, ctinfo, skb, dn->dccp_timeout[new_state]);
return NF_ACCEPT;
}
#endif
#ifdef CONFIG_SYSCTL
-static unsigned int dccp_sysctl_table_users;
-static struct ctl_table_header *dccp_sysctl_header;
-static ctl_table dccp_sysctl_table[] = {
+/* template, data assigned later */
+static struct ctl_table dccp_sysctl_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_dccp_timeout_request",
- .data = &dccp_timeout[CT_DCCP_REQUEST],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_dccp_timeout_respond",
- .data = &dccp_timeout[CT_DCCP_RESPOND],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_dccp_timeout_partopen",
- .data = &dccp_timeout[CT_DCCP_PARTOPEN],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_dccp_timeout_open",
- .data = &dccp_timeout[CT_DCCP_OPEN],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_dccp_timeout_closereq",
- .data = &dccp_timeout[CT_DCCP_CLOSEREQ],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_dccp_timeout_closing",
- .data = &dccp_timeout[CT_DCCP_CLOSING],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_dccp_timeout_timewait",
- .data = &dccp_timeout[CT_DCCP_TIMEWAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_dccp_loose",
- .data = &nf_ct_dccp_loose,
- .maxlen = sizeof(nf_ct_dccp_loose),
+ .maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif
-#ifdef CONFIG_SYSCTL
- .ctl_table_users = &dccp_sysctl_table_users,
- .ctl_table_header = &dccp_sysctl_header,
- .ctl_table = dccp_sysctl_table,
-#endif
};
static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = {
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif
+};
+
+static __net_init int dccp_net_init(struct net *net)
+{
+ struct dccp_net *dn;
+ int err;
+
+ dn = kmalloc(sizeof(*dn), GFP_KERNEL);
+ if (!dn)
+ return -ENOMEM;
+
+ /* default values */
+ dn->dccp_loose = 1;
+ dn->dccp_timeout[CT_DCCP_REQUEST] = 2 * DCCP_MSL;
+ dn->dccp_timeout[CT_DCCP_RESPOND] = 4 * DCCP_MSL;
+ dn->dccp_timeout[CT_DCCP_PARTOPEN] = 4 * DCCP_MSL;
+ dn->dccp_timeout[CT_DCCP_OPEN] = 12 * 3600 * HZ;
+ dn->dccp_timeout[CT_DCCP_CLOSEREQ] = 64 * HZ;
+ dn->dccp_timeout[CT_DCCP_CLOSING] = 64 * HZ;
+ dn->dccp_timeout[CT_DCCP_TIMEWAIT] = 2 * DCCP_MSL;
+
+ err = net_assign_generic(net, dccp_net_id, dn);
+ if (err)
+ goto out;
+
#ifdef CONFIG_SYSCTL
- .ctl_table_users = &dccp_sysctl_table_users,
- .ctl_table_header = &dccp_sysctl_header,
- .ctl_table = dccp_sysctl_table,
+ err = -ENOMEM;
+ dn->sysctl_table = kmemdup(dccp_sysctl_table,
+ sizeof(dccp_sysctl_table), GFP_KERNEL);
+ if (!dn->sysctl_table)
+ goto out;
+
+ dn->sysctl_table[0].data = &dn->dccp_timeout[CT_DCCP_REQUEST];
+ dn->sysctl_table[1].data = &dn->dccp_timeout[CT_DCCP_RESPOND];
+ dn->sysctl_table[2].data = &dn->dccp_timeout[CT_DCCP_PARTOPEN];
+ dn->sysctl_table[3].data = &dn->dccp_timeout[CT_DCCP_OPEN];
+ dn->sysctl_table[4].data = &dn->dccp_timeout[CT_DCCP_CLOSEREQ];
+ dn->sysctl_table[5].data = &dn->dccp_timeout[CT_DCCP_CLOSING];
+ dn->sysctl_table[6].data = &dn->dccp_timeout[CT_DCCP_TIMEWAIT];
+ dn->sysctl_table[7].data = &dn->dccp_loose;
+
+ dn->sysctl_header = register_net_sysctl_table(net,
+ nf_net_netfilter_sysctl_path, dn->sysctl_table);
+ if (!dn->sysctl_header) {
+ kfree(dn->sysctl_table);
+ goto out;
+ }
#endif
+
+ return 0;
+
+out:
+ kfree(dn);
+ return err;
+}
+
+static __net_exit void dccp_net_exit(struct net *net)
+{
+ struct dccp_net *dn = dccp_pernet(net);
+#ifdef CONFIG_SYSCTL
+ unregister_net_sysctl_table(dn->sysctl_header);
+ kfree(dn->sysctl_table);
+#endif
+ kfree(dn);
+
+ net_assign_generic(net, dccp_net_id, NULL);
+}
+
+static struct pernet_operations dccp_net_ops = {
+ .init = dccp_net_init,
+ .exit = dccp_net_exit,
};
static int __init nf_conntrack_proto_dccp_init(void)
{
int err;
- err = nf_conntrack_l4proto_register(&dccp_proto4);
+ err = register_pernet_gen_subsys(&dccp_net_id, &dccp_net_ops);
if (err < 0)
goto err1;
- err = nf_conntrack_l4proto_register(&dccp_proto6);
+ err = nf_conntrack_l4proto_register(&dccp_proto4);
if (err < 0)
goto err2;
+
+ err = nf_conntrack_l4proto_register(&dccp_proto6);
+ if (err < 0)
+ goto err3;
return 0;
-err2:
+err3:
nf_conntrack_l4proto_unregister(&dccp_proto4);
+err2:
+ unregister_pernet_gen_subsys(dccp_net_id, &dccp_net_ops);
err1:
return err;
}
static void __exit nf_conntrack_proto_dccp_fini(void)
{
+ unregister_pernet_gen_subsys(dccp_net_id, &dccp_net_ops);
nf_conntrack_l4proto_unregister(&dccp_proto6);
nf_conntrack_l4proto_unregister(&dccp_proto4);
}
struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
{
.l3proto = PF_UNSPEC,
- .l4proto = 0,
+ .l4proto = 255,
.name = "unknown",
.pkt_to_tuple = generic_pkt_to_tuple,
.invert_tuple = generic_invert_tuple,
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_log.h>
+#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
/* Protects ct->proto.tcp */
static DEFINE_RWLOCK(tcp_lock);
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_log.h>
+#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
static unsigned int nf_ct_udp_timeout __read_mostly = 30*HZ;
static unsigned int nf_ct_udp_timeout_stream __read_mostly = 180*HZ;
LOG target modules */
#define NF_LOG_PREFIXLEN 128
+#define NFLOGGER_NAME_LEN 64
static const struct nf_logger *nf_loggers[NFPROTO_NUMPROTO] __read_mostly;
+static struct list_head nf_loggers_l[NFPROTO_NUMPROTO] __read_mostly;
static DEFINE_MUTEX(nf_log_mutex);
-/* return EBUSY if somebody else is registered, EEXIST if the same logger
- * is registred, 0 on success. */
-int nf_log_register(u_int8_t pf, const struct nf_logger *logger)
+static struct nf_logger *__find_logger(int pf, const char *str_logger)
{
- int ret;
+ struct nf_logger *t;
- if (pf >= ARRAY_SIZE(nf_loggers))
- return -EINVAL;
-
- /* Any setup of logging members must be done before
- * substituting pointer. */
- ret = mutex_lock_interruptible(&nf_log_mutex);
- if (ret < 0)
- return ret;
-
- if (!nf_loggers[pf])
- rcu_assign_pointer(nf_loggers[pf], logger);
- else if (nf_loggers[pf] == logger)
- ret = -EEXIST;
- else
- ret = -EBUSY;
+ list_for_each_entry(t, &nf_loggers_l[pf], list[pf]) {
+ if (!strnicmp(str_logger, t->name, strlen(t->name)))
+ return t;
+ }
- mutex_unlock(&nf_log_mutex);
- return ret;
+ return NULL;
}
-EXPORT_SYMBOL(nf_log_register);
-void nf_log_unregister_pf(u_int8_t pf)
+/* return EEXIST if the same logger is registred, 0 on success. */
+int nf_log_register(u_int8_t pf, struct nf_logger *logger)
{
+ const struct nf_logger *llog;
+
if (pf >= ARRAY_SIZE(nf_loggers))
- return;
+ return -EINVAL;
+
mutex_lock(&nf_log_mutex);
- rcu_assign_pointer(nf_loggers[pf], NULL);
+
+ if (pf == NFPROTO_UNSPEC) {
+ int i;
+ for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++)
+ list_add_tail(&(logger->list[i]), &(nf_loggers_l[i]));
+ } else {
+ /* register at end of list to honor first register win */
+ list_add_tail(&logger->list[pf], &nf_loggers_l[pf]);
+ llog = rcu_dereference(nf_loggers[pf]);
+ if (llog == NULL)
+ rcu_assign_pointer(nf_loggers[pf], logger);
+ }
+
mutex_unlock(&nf_log_mutex);
- /* Give time to concurrent readers. */
- synchronize_rcu();
+ return 0;
}
-EXPORT_SYMBOL(nf_log_unregister_pf);
+EXPORT_SYMBOL(nf_log_register);
-void nf_log_unregister(const struct nf_logger *logger)
+void nf_log_unregister(struct nf_logger *logger)
{
+ const struct nf_logger *c_logger;
int i;
mutex_lock(&nf_log_mutex);
for (i = 0; i < ARRAY_SIZE(nf_loggers); i++) {
- if (nf_loggers[i] == logger)
+ c_logger = rcu_dereference(nf_loggers[i]);
+ if (c_logger == logger)
rcu_assign_pointer(nf_loggers[i], NULL);
+ list_del(&logger->list[i]);
}
mutex_unlock(&nf_log_mutex);
}
EXPORT_SYMBOL(nf_log_unregister);
+int nf_log_bind_pf(u_int8_t pf, const struct nf_logger *logger)
+{
+ mutex_lock(&nf_log_mutex);
+ if (__find_logger(pf, logger->name) == NULL) {
+ mutex_unlock(&nf_log_mutex);
+ return -ENOENT;
+ }
+ rcu_assign_pointer(nf_loggers[pf], logger);
+ mutex_unlock(&nf_log_mutex);
+ return 0;
+}
+EXPORT_SYMBOL(nf_log_bind_pf);
+
+void nf_log_unbind_pf(u_int8_t pf)
+{
+ mutex_lock(&nf_log_mutex);
+ rcu_assign_pointer(nf_loggers[pf], NULL);
+ mutex_unlock(&nf_log_mutex);
+}
+EXPORT_SYMBOL(nf_log_unbind_pf);
+
void nf_log_packet(u_int8_t pf,
unsigned int hooknum,
const struct sk_buff *skb,
{
loff_t *pos = v;
const struct nf_logger *logger;
+ struct nf_logger *t;
+ int ret;
logger = rcu_dereference(nf_loggers[*pos]);
if (!logger)
- return seq_printf(s, "%2lld NONE\n", *pos);
+ ret = seq_printf(s, "%2lld NONE (", *pos);
+ else
+ ret = seq_printf(s, "%2lld %s (", *pos, logger->name);
+
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&nf_log_mutex);
+ list_for_each_entry(t, &nf_loggers_l[*pos], list[*pos]) {
+ ret = seq_printf(s, "%s", t->name);
+ if (ret < 0) {
+ mutex_unlock(&nf_log_mutex);
+ return ret;
+ }
+ if (&t->list[*pos] != nf_loggers_l[*pos].prev) {
+ ret = seq_printf(s, ",");
+ if (ret < 0) {
+ mutex_unlock(&nf_log_mutex);
+ return ret;
+ }
+ }
+ }
+ mutex_unlock(&nf_log_mutex);
- return seq_printf(s, "%2lld %s\n", *pos, logger->name);
+ return seq_printf(s, ")\n");
}
static const struct seq_operations nflog_seq_ops = {
.release = seq_release,
};
+
#endif /* PROC_FS */
+#ifdef CONFIG_SYSCTL
+struct ctl_path nf_log_sysctl_path[] = {
+ { .procname = "net", .ctl_name = CTL_NET, },
+ { .procname = "netfilter", .ctl_name = NET_NETFILTER, },
+ { .procname = "nf_log", .ctl_name = CTL_UNNUMBERED, },
+ { }
+};
+
+static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3];
+static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1];
+static struct ctl_table_header *nf_log_dir_header;
+
+static int nf_log_proc_dostring(ctl_table *table, int write, struct file *filp,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ const struct nf_logger *logger;
+ int r = 0;
+ int tindex = (unsigned long)table->extra1;
+
+ if (write) {
+ if (!strcmp(buffer, "NONE")) {
+ nf_log_unbind_pf(tindex);
+ return 0;
+ }
+ mutex_lock(&nf_log_mutex);
+ logger = __find_logger(tindex, buffer);
+ if (logger == NULL) {
+ mutex_unlock(&nf_log_mutex);
+ return -ENOENT;
+ }
+ rcu_assign_pointer(nf_loggers[tindex], logger);
+ mutex_unlock(&nf_log_mutex);
+ } else {
+ rcu_read_lock();
+ logger = rcu_dereference(nf_loggers[tindex]);
+ if (!logger)
+ table->data = "NONE";
+ else
+ table->data = logger->name;
+ r = proc_dostring(table, write, filp, buffer, lenp, ppos);
+ rcu_read_unlock();
+ }
+
+ return r;
+}
+
+static __init int netfilter_log_sysctl_init(void)
+{
+ int i;
+
+ for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) {
+ snprintf(nf_log_sysctl_fnames[i-NFPROTO_UNSPEC], 3, "%d", i);
+ nf_log_sysctl_table[i].ctl_name = CTL_UNNUMBERED;
+ nf_log_sysctl_table[i].procname =
+ nf_log_sysctl_fnames[i-NFPROTO_UNSPEC];
+ nf_log_sysctl_table[i].data = NULL;
+ nf_log_sysctl_table[i].maxlen =
+ NFLOGGER_NAME_LEN * sizeof(char);
+ nf_log_sysctl_table[i].mode = 0644;
+ nf_log_sysctl_table[i].proc_handler = nf_log_proc_dostring;
+ nf_log_sysctl_table[i].extra1 = (void *)(unsigned long) i;
+ }
+
+ nf_log_dir_header = register_sysctl_paths(nf_log_sysctl_path,
+ nf_log_sysctl_table);
+ if (!nf_log_dir_header)
+ return -ENOMEM;
+
+ return 0;
+}
+#else
+static __init int netfilter_log_sysctl_init(void)
+{
+ return 0;
+}
+#endif /* CONFIG_SYSCTL */
int __init netfilter_log_init(void)
{
+ int i, r;
#ifdef CONFIG_PROC_FS
if (!proc_create("nf_log", S_IRUGO,
proc_net_netfilter, &nflog_file_ops))
return -1;
#endif
+
+ /* Errors will trigger panic, unroll on error is unnecessary. */
+ r = netfilter_log_sysctl_init();
+ if (r < 0)
+ return r;
+
+ for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++)
+ INIT_LIST_HEAD(&(nf_loggers_l[i]));
+
return 0;
}
}
EXPORT_SYMBOL_GPL(nfnetlink_send);
+void nfnetlink_set_err(u32 pid, u32 group, int error)
+{
+ netlink_set_err(nfnl, pid, group, error);
+}
+EXPORT_SYMBOL_GPL(nfnetlink_set_err);
+
int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags)
{
return netlink_unicast(nfnl, skb, pid, flags);
return -ENOTSUPP;
}
-static const struct nf_logger nfulnl_logger = {
+static struct nf_logger nfulnl_logger __read_mostly = {
.name = "nfnetlink_log",
.logfn = &nfulnl_log_packet,
.me = THIS_MODULE,
/* Commands without queue context */
switch (cmd->command) {
case NFULNL_CFG_CMD_PF_BIND:
- return nf_log_register(pf, &nfulnl_logger);
+ return nf_log_bind_pf(pf, &nfulnl_logger);
case NFULNL_CFG_CMD_PF_UNBIND:
- nf_log_unregister_pf(pf);
+ nf_log_unbind_pf(pf);
return 0;
}
}
goto cleanup_netlink_notifier;
}
+ status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger);
+ if (status < 0) {
+ printk(KERN_ERR "log: failed to register logger\n");
+ goto cleanup_subsys;
+ }
+
#ifdef CONFIG_PROC_FS
if (!proc_create("nfnetlink_log", 0440,
proc_net_netfilter, &nful_file_ops))
- goto cleanup_subsys;
+ goto cleanup_logger;
#endif
return status;
#ifdef CONFIG_PROC_FS
+cleanup_logger:
+ nf_log_unregister(&nfulnl_logger);
+#endif
cleanup_subsys:
nfnetlink_subsys_unregister(&nfulnl_subsys);
-#endif
cleanup_netlink_notifier:
netlink_unregister_notifier(&nfulnl_rtnl_notifier);
return status;
}
EXPORT_SYMBOL(xt_free_table_info);
+void xt_table_entry_swap_rcu(struct xt_table_info *oldinfo,
+ struct xt_table_info *newinfo)
+{
+ unsigned int cpu;
+
+ for_each_possible_cpu(cpu) {
+ void *p = oldinfo->entries[cpu];
+ rcu_assign_pointer(oldinfo->entries[cpu], newinfo->entries[cpu]);
+ newinfo->entries[cpu] = p;
+ }
+
+}
+EXPORT_SYMBOL_GPL(xt_table_entry_swap_rcu);
+
/* Find table by name, grabs mutex & ref. Returns ERR_PTR() on error. */
struct xt_table *xt_find_table_lock(struct net *net, u_int8_t af,
const char *name)
struct xt_table_info *oldinfo, *private;
/* Do the substitution. */
- write_lock_bh(&table->lock);
+ mutex_lock(&table->lock);
private = table->private;
/* Check inside lock: is the old number correct? */
if (num_counters != private->number) {
duprintf("num_counters != table->private->number (%u/%u)\n",
num_counters, private->number);
- write_unlock_bh(&table->lock);
+ mutex_unlock(&table->lock);
*error = -EAGAIN;
return NULL;
}
oldinfo = private;
- table->private = newinfo;
+ rcu_assign_pointer(table->private, newinfo);
newinfo->initial_entries = oldinfo->initial_entries;
- write_unlock_bh(&table->lock);
+ mutex_unlock(&table->lock);
+ synchronize_net();
return oldinfo;
}
EXPORT_SYMBOL_GPL(xt_replace_table);
/* Simplifies replace_table code. */
table->private = bootstrap;
- rwlock_init(&table->lock);
+ mutex_init(&table->lock);
+
if (!xt_replace_table(table, 0, newinfo, &ret))
goto unlock;
--- /dev/null
+/*
+ * TTL modification target for IP tables
+ * (C) 2000,2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * Hop Limit modification target for ip6tables
+ * Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <net/checksum.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv4/ipt_TTL.h>
+#include <linux/netfilter_ipv6/ip6t_HL.h>
+
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
+MODULE_DESCRIPTION("Xtables: Hoplimit/TTL Limit field modification target");
+MODULE_LICENSE("GPL");
+
+static unsigned int
+ttl_tg(struct sk_buff *skb, const struct xt_target_param *par)
+{
+ struct iphdr *iph;
+ const struct ipt_TTL_info *info = par->targinfo;
+ int new_ttl;
+
+ if (!skb_make_writable(skb, skb->len))
+ return NF_DROP;
+
+ iph = ip_hdr(skb);
+
+ switch (info->mode) {
+ case IPT_TTL_SET:
+ new_ttl = info->ttl;
+ break;
+ case IPT_TTL_INC:
+ new_ttl = iph->ttl + info->ttl;
+ if (new_ttl > 255)
+ new_ttl = 255;
+ break;
+ case IPT_TTL_DEC:
+ new_ttl = iph->ttl - info->ttl;
+ if (new_ttl < 0)
+ new_ttl = 0;
+ break;
+ default:
+ new_ttl = iph->ttl;
+ break;
+ }
+
+ if (new_ttl != iph->ttl) {
+ csum_replace2(&iph->check, htons(iph->ttl << 8),
+ htons(new_ttl << 8));
+ iph->ttl = new_ttl;
+ }
+
+ return XT_CONTINUE;
+}
+
+static unsigned int
+hl_tg6(struct sk_buff *skb, const struct xt_target_param *par)
+{
+ struct ipv6hdr *ip6h;
+ const struct ip6t_HL_info *info = par->targinfo;
+ int new_hl;
+
+ if (!skb_make_writable(skb, skb->len))
+ return NF_DROP;
+
+ ip6h = ipv6_hdr(skb);
+
+ switch (info->mode) {
+ case IP6T_HL_SET:
+ new_hl = info->hop_limit;
+ break;
+ case IP6T_HL_INC:
+ new_hl = ip6h->hop_limit + info->hop_limit;
+ if (new_hl > 255)
+ new_hl = 255;
+ break;
+ case IP6T_HL_DEC:
+ new_hl = ip6h->hop_limit - info->hop_limit;
+ if (new_hl < 0)
+ new_hl = 0;
+ break;
+ default:
+ new_hl = ip6h->hop_limit;
+ break;
+ }
+
+ ip6h->hop_limit = new_hl;
+
+ return XT_CONTINUE;
+}
+
+static bool ttl_tg_check(const struct xt_tgchk_param *par)
+{
+ const struct ipt_TTL_info *info = par->targinfo;
+
+ if (info->mode > IPT_TTL_MAXMODE) {
+ printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n",
+ info->mode);
+ return false;
+ }
+ if (info->mode != IPT_TTL_SET && info->ttl == 0)
+ return false;
+ return true;
+}
+
+static bool hl_tg6_check(const struct xt_tgchk_param *par)
+{
+ const struct ip6t_HL_info *info = par->targinfo;
+
+ if (info->mode > IP6T_HL_MAXMODE) {
+ printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
+ info->mode);
+ return false;
+ }
+ if (info->mode != IP6T_HL_SET && info->hop_limit == 0) {
+ printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
+ "make sense with value 0\n");
+ return false;
+ }
+ return true;
+}
+
+static struct xt_target hl_tg_reg[] __read_mostly = {
+ {
+ .name = "TTL",
+ .revision = 0,
+ .family = NFPROTO_IPV4,
+ .target = ttl_tg,
+ .targetsize = sizeof(struct ipt_TTL_info),
+ .table = "mangle",
+ .checkentry = ttl_tg_check,
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "HL",
+ .revision = 0,
+ .family = NFPROTO_IPV6,
+ .target = hl_tg6,
+ .targetsize = sizeof(struct ip6t_HL_info),
+ .table = "mangle",
+ .checkentry = hl_tg6_check,
+ .me = THIS_MODULE,
+ },
+};
+
+static int __init hl_tg_init(void)
+{
+ return xt_register_targets(hl_tg_reg, ARRAY_SIZE(hl_tg_reg));
+}
+
+static void __exit hl_tg_exit(void)
+{
+ xt_unregister_targets(hl_tg_reg, ARRAY_SIZE(hl_tg_reg));
+}
+
+module_init(hl_tg_init);
+module_exit(hl_tg_exit);
+MODULE_ALIAS("ipt_TTL");
+MODULE_ALIAS("ip6t_HL");
--- /dev/null
+/*
+ * xt_LED.c - netfilter target to make LEDs blink upon packet matches
+ *
+ * Copyright (C) 2008 Adam Nielsen <a.nielsen@shikadi.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/leds.h>
+#include <linux/mutex.h>
+
+#include <linux/netfilter/xt_LED.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Adam Nielsen <a.nielsen@shikadi.net>");
+MODULE_DESCRIPTION("Xtables: trigger LED devices on packet match");
+
+/*
+ * This is declared in here (the kernel module) only, to avoid having these
+ * dependencies in userspace code. This is what xt_led_info.internal_data
+ * points to.
+ */
+struct xt_led_info_internal {
+ struct led_trigger netfilter_led_trigger;
+ struct timer_list timer;
+};
+
+static unsigned int
+led_tg(struct sk_buff *skb, const struct xt_target_param *par)
+{
+ const struct xt_led_info *ledinfo = par->targinfo;
+ struct xt_led_info_internal *ledinternal = ledinfo->internal_data;
+
+ /*
+ * If "always blink" is enabled, and there's still some time until the
+ * LED will switch off, briefly switch it off now.
+ */
+ if ((ledinfo->delay > 0) && ledinfo->always_blink &&
+ timer_pending(&ledinternal->timer))
+ led_trigger_event(&ledinternal->netfilter_led_trigger,LED_OFF);
+
+ led_trigger_event(&ledinternal->netfilter_led_trigger, LED_FULL);
+
+ /* If there's a positive delay, start/update the timer */
+ if (ledinfo->delay > 0) {
+ mod_timer(&ledinternal->timer,
+ jiffies + msecs_to_jiffies(ledinfo->delay));
+
+ /* Otherwise if there was no delay given, blink as fast as possible */
+ } else if (ledinfo->delay == 0) {
+ led_trigger_event(&ledinternal->netfilter_led_trigger, LED_OFF);
+ }
+
+ /* else the delay is negative, which means switch on and stay on */
+
+ return XT_CONTINUE;
+}
+
+static void led_timeout_callback(unsigned long data)
+{
+ struct xt_led_info *ledinfo = (struct xt_led_info *)data;
+ struct xt_led_info_internal *ledinternal = ledinfo->internal_data;
+
+ led_trigger_event(&ledinternal->netfilter_led_trigger, LED_OFF);
+}
+
+static bool led_tg_check(const struct xt_tgchk_param *par)
+{
+ struct xt_led_info *ledinfo = par->targinfo;
+ struct xt_led_info_internal *ledinternal;
+ int err;
+
+ if (ledinfo->id[0] == '\0') {
+ printk(KERN_ERR KBUILD_MODNAME ": No 'id' parameter given.\n");
+ return false;
+ }
+
+ ledinternal = kzalloc(sizeof(struct xt_led_info_internal), GFP_KERNEL);
+ if (!ledinternal) {
+ printk(KERN_CRIT KBUILD_MODNAME ": out of memory\n");
+ return false;
+ }
+
+ ledinternal->netfilter_led_trigger.name = ledinfo->id;
+
+ err = led_trigger_register(&ledinternal->netfilter_led_trigger);
+ if (err) {
+ printk(KERN_CRIT KBUILD_MODNAME
+ ": led_trigger_register() failed\n");
+ if (err == -EEXIST)
+ printk(KERN_ERR KBUILD_MODNAME
+ ": Trigger name is already in use.\n");
+ goto exit_alloc;
+ }
+
+ /* See if we need to set up a timer */
+ if (ledinfo->delay > 0)
+ setup_timer(&ledinternal->timer, led_timeout_callback,
+ (unsigned long)ledinfo);
+
+ ledinfo->internal_data = ledinternal;
+
+ return true;
+
+exit_alloc:
+ kfree(ledinternal);
+
+ return false;
+}
+
+static void led_tg_destroy(const struct xt_tgdtor_param *par)
+{
+ const struct xt_led_info *ledinfo = par->targinfo;
+ struct xt_led_info_internal *ledinternal = ledinfo->internal_data;
+
+ if (ledinfo->delay > 0)
+ del_timer_sync(&ledinternal->timer);
+
+ led_trigger_unregister(&ledinternal->netfilter_led_trigger);
+ kfree(ledinternal);
+}
+
+static struct xt_target led_tg_reg __read_mostly = {
+ .name = "LED",
+ .revision = 0,
+ .family = NFPROTO_UNSPEC,
+ .target = led_tg,
+ .targetsize = XT_ALIGN(sizeof(struct xt_led_info)),
+ .checkentry = led_tg_check,
+ .destroy = led_tg_destroy,
+ .me = THIS_MODULE,
+};
+
+static int __init led_tg_init(void)
+{
+ return xt_register_target(&led_tg_reg);
+}
+
+static void __exit led_tg_exit(void)
+{
+ xt_unregister_target(&led_tg_reg);
+}
+
+module_init(led_tg_init);
+module_exit(led_tg_exit);
--- /dev/null
+/*
+ * (C) 2008-2009 Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * 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.
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/jhash.h>
+#include <linux/ip.h>
+#include <net/ipv6.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <linux/netfilter/xt_cluster.h>
+
+static inline u_int32_t nf_ct_orig_ipv4_src(const struct nf_conn *ct)
+{
+ return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip;
+}
+
+static inline const void *nf_ct_orig_ipv6_src(const struct nf_conn *ct)
+{
+ return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip6;
+}
+
+static inline u_int32_t
+xt_cluster_hash_ipv4(u_int32_t ip, const struct xt_cluster_match_info *info)
+{
+ return jhash_1word(ip, info->hash_seed);
+}
+
+static inline u_int32_t
+xt_cluster_hash_ipv6(const void *ip, const struct xt_cluster_match_info *info)
+{
+ return jhash2(ip, NF_CT_TUPLE_L3SIZE / sizeof(__u32), info->hash_seed);
+}
+
+static inline u_int32_t
+xt_cluster_hash(const struct nf_conn *ct,
+ const struct xt_cluster_match_info *info)
+{
+ u_int32_t hash = 0;
+
+ switch(nf_ct_l3num(ct)) {
+ case AF_INET:
+ hash = xt_cluster_hash_ipv4(nf_ct_orig_ipv4_src(ct), info);
+ break;
+ case AF_INET6:
+ hash = xt_cluster_hash_ipv6(nf_ct_orig_ipv6_src(ct), info);
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ return (((u64)hash * info->total_nodes) >> 32);
+}
+
+static inline bool
+xt_cluster_is_multicast_addr(const struct sk_buff *skb, u_int8_t family)
+{
+ bool is_multicast = false;
+
+ switch(family) {
+ case NFPROTO_IPV4:
+ is_multicast = ipv4_is_multicast(ip_hdr(skb)->daddr);
+ break;
+ case NFPROTO_IPV6:
+ is_multicast = ipv6_addr_type(&ipv6_hdr(skb)->daddr) &
+ IPV6_ADDR_MULTICAST;
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ return is_multicast;
+}
+
+static bool
+xt_cluster_mt(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+ struct sk_buff *pskb = (struct sk_buff *)skb;
+ const struct xt_cluster_match_info *info = par->matchinfo;
+ const struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
+ unsigned long hash;
+
+ /* This match assumes that all nodes see the same packets. This can be
+ * achieved if the switch that connects the cluster nodes support some
+ * sort of 'port mirroring'. However, if your switch does not support
+ * this, your cluster nodes can reply ARP request using a multicast MAC
+ * address. Thus, your switch will flood the same packets to the
+ * cluster nodes with the same multicast MAC address. Using a multicast
+ * link address is a RFC 1812 (section 3.3.2) violation, but this works
+ * fine in practise.
+ *
+ * Unfortunately, if you use the multicast MAC address, the link layer
+ * sets skbuff's pkt_type to PACKET_MULTICAST, which is not accepted
+ * by TCP and others for packets coming to this node. For that reason,
+ * this match mangles skbuff's pkt_type if it detects a packet
+ * addressed to a unicast address but using PACKET_MULTICAST. Yes, I
+ * know, matches should not alter packets, but we are doing this here
+ * because we would need to add a PKTTYPE target for this sole purpose.
+ */
+ if (!xt_cluster_is_multicast_addr(skb, par->family) &&
+ skb->pkt_type == PACKET_MULTICAST) {
+ pskb->pkt_type = PACKET_HOST;
+ }
+
+ ct = nf_ct_get(skb, &ctinfo);
+ if (ct == NULL)
+ return false;
+
+ if (ct == &nf_conntrack_untracked)
+ return false;
+
+ if (ct->master)
+ hash = xt_cluster_hash(ct->master, info);
+ else
+ hash = xt_cluster_hash(ct, info);
+
+ return !!((1 << hash) & info->node_mask) ^
+ !!(info->flags & XT_CLUSTER_F_INV);
+}
+
+static bool xt_cluster_mt_checkentry(const struct xt_mtchk_param *par)
+{
+ struct xt_cluster_match_info *info = par->matchinfo;
+
+ if (info->node_mask >= (1 << info->total_nodes)) {
+ printk(KERN_ERR "xt_cluster: this node mask cannot be "
+ "higher than the total number of nodes\n");
+ return false;
+ }
+ return true;
+}
+
+static struct xt_match xt_cluster_match __read_mostly = {
+ .name = "cluster",
+ .family = NFPROTO_UNSPEC,
+ .match = xt_cluster_mt,
+ .checkentry = xt_cluster_mt_checkentry,
+ .matchsize = sizeof(struct xt_cluster_match_info),
+ .me = THIS_MODULE,
+};
+
+static int __init xt_cluster_mt_init(void)
+{
+ return xt_register_match(&xt_cluster_match);
+}
+
+static void __exit xt_cluster_mt_fini(void)
+{
+ xt_unregister_match(&xt_cluster_match);
+}
+
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Xtables: hash-based cluster match");
+MODULE_ALIAS("ipt_cluster");
+MODULE_ALIAS("ip6t_cluster");
+module_init(xt_cluster_mt_init);
+module_exit(xt_cluster_mt_fini);
/* initialize hash with random val at the time we allocate
* the first hashtable entry */
if (!ht->rnd_initialized) {
- get_random_bytes(&ht->rnd, 4);
+ get_random_bytes(&ht->rnd, sizeof(ht->rnd));
ht->rnd_initialized = 1;
}
static bool
hashlimit_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
{
- const struct xt_hashlimit_info *r =
- ((const struct xt_hashlimit_info *)par->matchinfo)->u.master;
+ const struct xt_hashlimit_info *r = par->matchinfo;
struct xt_hashlimit_htable *hinfo = r->hinfo;
unsigned long now = jiffies;
struct dsthash_ent *dh;
}
mutex_unlock(&hlimit_mutex);
- /* Ugly hack: For SMP, we only want to use one set */
- r->u.master = r;
return true;
}
--- /dev/null
+/*
+ * IP tables module for matching the value of the TTL
+ * (C) 2000,2001 by Harald Welte <laforge@netfilter.org>
+ *
+ * Hop Limit matching module
+ * (C) 2001-2002 Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ *
+ * 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.
+ */
+
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv4/ipt_ttl.h>
+#include <linux/netfilter_ipv6/ip6t_hl.h>
+
+MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
+MODULE_DESCRIPTION("Xtables: Hoplimit/TTL field match");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_ttl");
+MODULE_ALIAS("ip6t_hl");
+
+static bool ttl_mt(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+ const struct ipt_ttl_info *info = par->matchinfo;
+ const u8 ttl = ip_hdr(skb)->ttl;
+
+ switch (info->mode) {
+ case IPT_TTL_EQ:
+ return ttl == info->ttl;
+ case IPT_TTL_NE:
+ return ttl != info->ttl;
+ case IPT_TTL_LT:
+ return ttl < info->ttl;
+ case IPT_TTL_GT:
+ return ttl > info->ttl;
+ default:
+ printk(KERN_WARNING "ipt_ttl: unknown mode %d\n",
+ info->mode);
+ return false;
+ }
+
+ return false;
+}
+
+static bool hl_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+ const struct ip6t_hl_info *info = par->matchinfo;
+ const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+
+ switch (info->mode) {
+ case IP6T_HL_EQ:
+ return ip6h->hop_limit == info->hop_limit;
+ break;
+ case IP6T_HL_NE:
+ return ip6h->hop_limit != info->hop_limit;
+ break;
+ case IP6T_HL_LT:
+ return ip6h->hop_limit < info->hop_limit;
+ break;
+ case IP6T_HL_GT:
+ return ip6h->hop_limit > info->hop_limit;
+ break;
+ default:
+ printk(KERN_WARNING "ip6t_hl: unknown mode %d\n",
+ info->mode);
+ return false;
+ }
+
+ return false;
+}
+
+static struct xt_match hl_mt_reg[] __read_mostly = {
+ {
+ .name = "ttl",
+ .revision = 0,
+ .family = NFPROTO_IPV4,
+ .match = ttl_mt,
+ .matchsize = sizeof(struct ipt_ttl_info),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "hl",
+ .revision = 0,
+ .family = NFPROTO_IPV6,
+ .match = hl_mt6,
+ .matchsize = sizeof(struct ip6t_hl_info),
+ .me = THIS_MODULE,
+ },
+};
+
+static int __init hl_mt_init(void)
+{
+ return xt_register_matches(hl_mt_reg, ARRAY_SIZE(hl_mt_reg));
+}
+
+static void __exit hl_mt_exit(void)
+{
+ xt_unregister_matches(hl_mt_reg, ARRAY_SIZE(hl_mt_reg));
+}
+
+module_init(hl_mt_init);
+module_exit(hl_mt_exit);
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_limit.h>
+struct xt_limit_priv {
+ unsigned long prev;
+ uint32_t credit;
+};
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Herve Eychenne <rv@wallfire.org>");
MODULE_DESCRIPTION("Xtables: rate-limit match");
static bool
limit_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
- struct xt_rateinfo *r =
- ((const struct xt_rateinfo *)par->matchinfo)->master;
+ const struct xt_rateinfo *r = par->matchinfo;
+ struct xt_limit_priv *priv = r->master;
unsigned long now = jiffies;
spin_lock_bh(&limit_lock);
- r->credit += (now - xchg(&r->prev, now)) * CREDITS_PER_JIFFY;
- if (r->credit > r->credit_cap)
- r->credit = r->credit_cap;
+ priv->credit += (now - xchg(&priv->prev, now)) * CREDITS_PER_JIFFY;
+ if (priv->credit > r->credit_cap)
+ priv->credit = r->credit_cap;
- if (r->credit >= r->cost) {
+ if (priv->credit >= r->cost) {
/* We're not limited. */
- r->credit -= r->cost;
+ priv->credit -= r->cost;
spin_unlock_bh(&limit_lock);
return true;
}
static bool limit_mt_check(const struct xt_mtchk_param *par)
{
struct xt_rateinfo *r = par->matchinfo;
+ struct xt_limit_priv *priv;
/* Check for overflow. */
if (r->burst == 0
return false;
}
- /* For SMP, we only want to use one set of counters. */
- r->master = r;
+ priv = kmalloc(sizeof(*priv), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
+
+ /* For SMP, we only want to use one set of state. */
+ r->master = priv;
if (r->cost == 0) {
/* User avg in seconds * XT_LIMIT_SCALE: convert to jiffies *
128. */
- r->prev = jiffies;
- r->credit = user2credits(r->avg * r->burst); /* Credits full. */
+ priv->prev = jiffies;
+ priv->credit = user2credits(r->avg * r->burst); /* Credits full. */
r->credit_cap = user2credits(r->avg * r->burst); /* Credits full. */
r->cost = user2credits(r->avg);
}
return true;
}
+static void limit_mt_destroy(const struct xt_mtdtor_param *par)
+{
+ const struct xt_rateinfo *info = par->matchinfo;
+
+ kfree(info->master);
+}
+
#ifdef CONFIG_COMPAT
struct compat_xt_rateinfo {
u_int32_t avg;
.family = NFPROTO_UNSPEC,
.match = limit_mt,
.checkentry = limit_mt_check,
+ .destroy = limit_mt_destroy,
.matchsize = sizeof(struct xt_rateinfo),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_rateinfo),
MODULE_ALIAS("ipt_physdev");
MODULE_ALIAS("ip6t_physdev");
+static unsigned long ifname_compare(const char *_a, const char *_b, const char *_mask)
+{
+ const unsigned long *a = (const unsigned long *)_a;
+ const unsigned long *b = (const unsigned long *)_b;
+ const unsigned long *mask = (const unsigned long *)_mask;
+ unsigned long ret;
+
+ ret = (a[0] ^ b[0]) & mask[0];
+ if (IFNAMSIZ > sizeof(unsigned long))
+ ret |= (a[1] ^ b[1]) & mask[1];
+ if (IFNAMSIZ > 2 * sizeof(unsigned long))
+ ret |= (a[2] ^ b[2]) & mask[2];
+ if (IFNAMSIZ > 3 * sizeof(unsigned long))
+ ret |= (a[3] ^ b[3]) & mask[3];
+ BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
+ return ret;
+}
+
static bool
physdev_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
- int i;
- static const char nulldevname[IFNAMSIZ];
+ static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
const struct xt_physdev_info *info = par->matchinfo;
- bool ret;
+ unsigned long ret;
const char *indev, *outdev;
const struct nf_bridge_info *nf_bridge;
if (!(info->bitmask & XT_PHYSDEV_OP_IN))
goto match_outdev;
indev = nf_bridge->physindev ? nf_bridge->physindev->name : nulldevname;
- for (i = 0, ret = false; i < IFNAMSIZ/sizeof(unsigned int); i++) {
- ret |= (((const unsigned int *)indev)[i]
- ^ ((const unsigned int *)info->physindev)[i])
- & ((const unsigned int *)info->in_mask)[i];
- }
+ ret = ifname_compare(indev, info->physindev, info->in_mask);
if (!ret ^ !(info->invert & XT_PHYSDEV_OP_IN))
return false;
return true;
outdev = nf_bridge->physoutdev ?
nf_bridge->physoutdev->name : nulldevname;
- for (i = 0, ret = false; i < IFNAMSIZ/sizeof(unsigned int); i++) {
- ret |= (((const unsigned int *)outdev)[i]
- ^ ((const unsigned int *)info->physoutdev)[i])
- & ((const unsigned int *)info->out_mask)[i];
- }
+ ret = ifname_compare(outdev, info->physoutdev, info->out_mask);
- return ret ^ !(info->invert & XT_PHYSDEV_OP_OUT);
+ return (!!ret ^ !(info->invert & XT_PHYSDEV_OP_OUT));
}
static bool physdev_mt_check(const struct xt_mtchk_param *par)
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_quota.h>
+struct xt_quota_priv {
+ uint64_t quota;
+};
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Sam Johnston <samj@samj.net>");
MODULE_DESCRIPTION("Xtables: countdown quota match");
static bool
quota_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
- struct xt_quota_info *q =
- ((const struct xt_quota_info *)par->matchinfo)->master;
+ struct xt_quota_info *q = (void *)par->matchinfo;
+ struct xt_quota_priv *priv = q->master;
bool ret = q->flags & XT_QUOTA_INVERT;
spin_lock_bh("a_lock);
- if (q->quota >= skb->len) {
- q->quota -= skb->len;
+ if (priv->quota >= skb->len) {
+ priv->quota -= skb->len;
ret = !ret;
} else {
/* we do not allow even small packets from now on */
- q->quota = 0;
+ priv->quota = 0;
}
+ /* Copy quota back to matchinfo so that iptables can display it */
+ q->quota = priv->quota;
spin_unlock_bh("a_lock);
return ret;
if (q->flags & ~XT_QUOTA_MASK)
return false;
- /* For SMP, we only want to use one set of counters. */
- q->master = q;
+
+ q->master = kmalloc(sizeof(*q->master), GFP_KERNEL);
+ if (q->master == NULL)
+ return -ENOMEM;
+
return true;
}
+static void quota_mt_destroy(const struct xt_mtdtor_param *par)
+{
+ const struct xt_quota_info *q = par->matchinfo;
+
+ kfree(q->master);
+}
+
static struct xt_match quota_mt_reg __read_mostly = {
.name = "quota",
.revision = 0,
.family = NFPROTO_UNSPEC,
.match = quota_mt,
.checkentry = quota_mt_check,
+ .destroy = quota_mt_destroy,
.matchsize = sizeof(struct xt_quota_info),
.me = THIS_MODULE,
};
#include <linux/netfilter/xt_statistic.h>
#include <linux/netfilter/x_tables.h>
+struct xt_statistic_priv {
+ uint32_t count;
+};
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("Xtables: statistics-based matching (\"Nth\", random)");
static bool
statistic_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
- struct xt_statistic_info *info = (void *)par->matchinfo;
+ const struct xt_statistic_info *info = par->matchinfo;
bool ret = info->flags & XT_STATISTIC_INVERT;
switch (info->mode) {
ret = !ret;
break;
case XT_STATISTIC_MODE_NTH:
- info = info->master;
spin_lock_bh(&nth_lock);
- if (info->u.nth.count++ == info->u.nth.every) {
- info->u.nth.count = 0;
+ if (info->master->count++ == info->u.nth.every) {
+ info->master->count = 0;
ret = !ret;
}
spin_unlock_bh(&nth_lock);
if (info->mode > XT_STATISTIC_MODE_MAX ||
info->flags & ~XT_STATISTIC_MASK)
return false;
- info->master = info;
+
+ info->master = kzalloc(sizeof(*info->master), GFP_KERNEL);
+ if (info->master == NULL) {
+ printk(KERN_ERR KBUILD_MODNAME ": Out of memory\n");
+ return false;
+ }
+ info->master->count = info->u.nth.count;
+
return true;
}
+static void statistic_mt_destroy(const struct xt_mtdtor_param *par)
+{
+ const struct xt_statistic_info *info = par->matchinfo;
+
+ kfree(info->master);
+}
+
static struct xt_match xt_statistic_mt_reg __read_mostly = {
.name = "statistic",
.revision = 0,
.family = NFPROTO_UNSPEC,
.match = statistic_mt,
.checkentry = statistic_mt_check,
+ .destroy = statistic_mt_destroy,
.matchsize = sizeof(struct xt_statistic_info),
.me = THIS_MODULE,
};
read_unlock(&nl_table_lock);
}
+EXPORT_SYMBOL(netlink_set_err);
/* must be called with netlink table grabbed */
static void netlink_update_socket_mc(struct netlink_sock *nlk,
static int net_ctl_ro_header_perms(struct ctl_table_root *root,
struct nsproxy *namespaces, struct ctl_table *table)
{
- if (namespaces->net_ns == &init_net)
+ if (net_eq(namespaces->net_ns, &init_net))
return table->mode;
else
return table->mode & ~0222;
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / commitdiff