*/
#include <linux/capability.h>
-#include <linux/config.h>
#include <linux/in.h>
#include <linux/skbuff.h>
#include <linux/kmod.h>
#include <linux/vmalloc.h>
#include <linux/netdevice.h>
#include <linux/module.h>
+#include <linux/poison.h>
#include <linux/icmpv6.h>
#include <net/ipv6.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
#include <linux/proc_fs.h>
#include <linux/cpumask.h>
#define IP_NF_ASSERT(x)
#endif
-
-#include <linux/netfilter_ipv4/listhelp.h>
-
#if 0
/* All the better to debug you with... */
#define static
#define up(x) do { printk("UP:%u:" #x "\n", __LINE__); up(x); } while(0)
#endif
-int
-ip6_masked_addrcmp(const struct in6_addr *addr1, const struct in6_addr *mask,
- const struct in6_addr *addr2)
-{
- int i;
- for( i = 0; i < 16; i++){
- if((addr1->s6_addr[i] & mask->s6_addr[i]) !=
- (addr2->s6_addr[i] & mask->s6_addr[i]))
- return 1;
- }
- return 0;
-}
-
/* Check for an extension */
int
ip6t_ext_hdr(u8 nexthdr)
#define FWINV(bool,invflg) ((bool) ^ !!(ip6info->invflags & invflg))
- if (FWINV(ip6_masked_addrcmp(&ipv6->saddr, &ip6info->smsk,
- &ip6info->src), IP6T_INV_SRCIP)
- || FWINV(ip6_masked_addrcmp(&ipv6->daddr, &ip6info->dmsk,
- &ip6info->dst), IP6T_INV_DSTIP)) {
+ if (FWINV(ipv6_masked_addr_cmp(&ipv6->saddr, &ip6info->smsk,
+ &ip6info->src), IP6T_INV_SRCIP)
+ || FWINV(ipv6_masked_addr_cmp(&ipv6->daddr, &ip6info->dmsk,
+ &ip6info->dst), IP6T_INV_DSTIP)) {
dprintf("Source or dest mismatch.\n");
/*
dprintf("SRC: %u. Mask: %u. Target: %u.%s\n", ip->saddr,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
- const void *targinfo,
- void *userinfo)
+ const struct xt_target *target,
+ const void *targinfo)
{
if (net_ratelimit())
printk("ip6_tables: error: `%s'\n", (char *)targinfo);
int *hotdrop)
{
/* Stop iteration if it doesn't match */
- if (!m->u.kernel.match->match(skb, in, out, m->data,
+ if (!m->u.kernel.match->match(skb, in, out, m->u.kernel.match, m->data,
offset, protoff, hotdrop))
return 1;
else
unsigned int hook,
const struct net_device *in,
const struct net_device *out,
- struct xt_table *table,
- void *userdata)
+ struct xt_table *table)
{
static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
int offset = 0;
table_base = (void *)private->entries[smp_processor_id()];
e = get_entry(table_base, private->hook_entry[hook]);
-#ifdef CONFIG_NETFILTER_DEBUG
- /* Check noone else using our table */
- if (((struct ip6t_entry *)table_base)->comefrom != 0xdead57ac
- && ((struct ip6t_entry *)table_base)->comefrom != 0xeeeeeeec) {
- printk("ASSERT: CPU #%u, %s comefrom(%p) = %X\n",
- smp_processor_id(),
- table->name,
- &((struct ip6t_entry *)table_base)->comefrom,
- ((struct ip6t_entry *)table_base)->comefrom);
- }
- ((struct ip6t_entry *)table_base)->comefrom = 0x57acc001;
-#endif
-
/* For return from builtin chain */
back = get_entry(table_base, private->underflow[hook]);
verdict = t->u.kernel.target->target(pskb,
in, out,
hook,
- t->data,
- userdata);
+ t->u.kernel.target,
+ t->data);
#ifdef CONFIG_NETFILTER_DEBUG
if (((struct ip6t_entry *)table_base)->comefrom
} while (!hotdrop);
#ifdef CONFIG_NETFILTER_DEBUG
- ((struct ip6t_entry *)table_base)->comefrom = 0xdead57ac;
+ ((struct ip6t_entry *)table_base)->comefrom = NETFILTER_LINK_POISON;
#endif
read_unlock_bh(&table->lock);
unsigned int pos = newinfo->hook_entry[hook];
struct ip6t_entry *e
= (struct ip6t_entry *)(entry0 + pos);
+ int visited = e->comefrom & (1 << hook);
if (!(valid_hooks & (1 << hook)))
continue;
|= ((1 << hook) | (1 << NF_IP6_NUMHOOKS));
/* Unconditional return/END. */
- if (e->target_offset == sizeof(struct ip6t_entry)
+ if ((e->target_offset == sizeof(struct ip6t_entry)
&& (strcmp(t->target.u.user.name,
IP6T_STANDARD_TARGET) == 0)
&& t->verdict < 0
- && unconditional(&e->ipv6)) {
+ && unconditional(&e->ipv6)) || visited) {
unsigned int oldpos, size;
+ if (t->verdict < -NF_MAX_VERDICT - 1) {
+ duprintf("mark_source_chains: bad "
+ "negative verdict (%i)\n",
+ t->verdict);
+ return 0;
+ }
+
/* Return: backtrack through the last
big jump. */
do {
if (strcmp(t->target.u.user.name,
IP6T_STANDARD_TARGET) == 0
&& newpos >= 0) {
+ if (newpos > newinfo->size -
+ sizeof(struct ip6t_entry)) {
+ duprintf("mark_source_chains: "
+ "bad verdict (%i)\n",
+ newpos);
+ return 0;
+ }
/* This a jump; chase it. */
duprintf("Jump rule %u -> %u\n",
pos, newpos);
return 1;
if (m->u.kernel.match->destroy)
- m->u.kernel.match->destroy(m->data,
- m->u.match_size - sizeof(*m));
+ m->u.kernel.match->destroy(m->u.kernel.match, m->data);
module_put(m->u.kernel.match->me);
return 0;
}
-static inline int
-standard_check(const struct ip6t_entry_target *t,
- unsigned int max_offset)
-{
- struct ip6t_standard_target *targ = (void *)t;
-
- /* Check standard info. */
- if (t->u.target_size
- != IP6T_ALIGN(sizeof(struct ip6t_standard_target))) {
- duprintf("standard_check: target size %u != %u\n",
- t->u.target_size,
- IP6T_ALIGN(sizeof(struct ip6t_standard_target)));
- return 0;
- }
-
- if (targ->verdict >= 0
- && targ->verdict > max_offset - sizeof(struct ip6t_entry)) {
- duprintf("ip6t_standard_check: bad verdict (%i)\n",
- targ->verdict);
- return 0;
- }
-
- if (targ->verdict < -NF_MAX_VERDICT - 1) {
- duprintf("ip6t_standard_check: bad negative verdict (%i)\n",
- targ->verdict);
- return 0;
- }
- return 1;
-}
-
static inline int
check_match(struct ip6t_entry_match *m,
const char *name,
unsigned int *i)
{
struct ip6t_match *match;
+ int ret;
match = try_then_request_module(xt_find_match(AF_INET6, m->u.user.name,
m->u.user.revision),
}
m->u.kernel.match = match;
+ ret = xt_check_match(match, AF_INET6, m->u.match_size - sizeof(*m),
+ name, hookmask, ipv6->proto,
+ ipv6->invflags & IP6T_INV_PROTO);
+ if (ret)
+ goto err;
+
if (m->u.kernel.match->checkentry
- && !m->u.kernel.match->checkentry(name, ipv6, m->data,
- m->u.match_size - sizeof(*m),
+ && !m->u.kernel.match->checkentry(name, ipv6, match, m->data,
hookmask)) {
- module_put(m->u.kernel.match->me);
duprintf("ip_tables: check failed for `%s'.\n",
m->u.kernel.match->name);
- return -EINVAL;
+ ret = -EINVAL;
+ goto err;
}
(*i)++;
return 0;
+err:
+ module_put(m->u.kernel.match->me);
+ return ret;
}
static struct ip6t_target ip6t_standard_target;
return -EINVAL;
}
+ if (e->target_offset + sizeof(struct ip6t_entry_target) >
+ e->next_offset)
+ return -EINVAL;
+
j = 0;
ret = IP6T_MATCH_ITERATE(e, check_match, name, &e->ipv6, e->comefrom, &j);
if (ret != 0)
goto cleanup_matches;
t = ip6t_get_target(e);
+ ret = -EINVAL;
+ if (e->target_offset + t->u.target_size > e->next_offset)
+ goto cleanup_matches;
target = try_then_request_module(xt_find_target(AF_INET6,
t->u.user.name,
t->u.user.revision),
}
t->u.kernel.target = target;
- if (t->u.kernel.target == &ip6t_standard_target) {
- if (!standard_check(t, size)) {
- ret = -EINVAL;
- goto cleanup_matches;
- }
- } else if (t->u.kernel.target->checkentry
- && !t->u.kernel.target->checkentry(name, e, t->data,
- t->u.target_size
- - sizeof(*t),
+ ret = xt_check_target(target, AF_INET6, t->u.target_size - sizeof(*t),
+ name, e->comefrom, e->ipv6.proto,
+ e->ipv6.invflags & IP6T_INV_PROTO);
+ if (ret)
+ goto err;
+
+ if (t->u.kernel.target->checkentry
+ && !t->u.kernel.target->checkentry(name, e, target, t->data,
e->comefrom)) {
- module_put(t->u.kernel.target->me);
duprintf("ip_tables: check failed for `%s'.\n",
t->u.kernel.target->name);
ret = -EINVAL;
- goto cleanup_matches;
+ goto err;
}
(*i)++;
return 0;
-
+ err:
+ module_put(t->u.kernel.target->me);
cleanup_matches:
IP6T_MATCH_ITERATE(e, cleanup_match, &j);
return ret;
IP6T_MATCH_ITERATE(e, cleanup_match, NULL);
t = ip6t_get_target(e);
if (t->u.kernel.target->destroy)
- t->u.kernel.target->destroy(t->data,
- t->u.target_size - sizeof(*t));
+ t->u.kernel.target->destroy(t->u.kernel.target, t->data);
module_put(t->u.kernel.target->me);
return 0;
}
if (ret != 0) {
IP6T_ENTRY_ITERATE(entry0, newinfo->size,
- cleanup_entry, &i);
+ cleanup_entry, &i);
return ret;
}
/* And one copy for every other CPU */
- for_each_cpu(i) {
+ for_each_possible_cpu(i) {
if (newinfo->entries[i] && newinfo->entries[i] != entry0)
memcpy(newinfo->entries[i], entry0, newinfo->size);
}
- return ret;
+ return 0;
}
/* Gets counters. */
counters,
&i);
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
if (cpu == curcpu)
continue;
i = 0;
return ret;
}
- if (xt_register_table(table, &bootstrap, newinfo) != 0) {
+ ret = xt_register_table(table, &bootstrap, newinfo);
+ if (ret != 0) {
xt_free_table_info(newinfo);
return ret;
}
icmp6_match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
+ const struct xt_match *match,
const void *matchinfo,
int offset,
unsigned int protoff,
static int
icmp6_checkentry(const char *tablename,
const void *entry,
+ const struct xt_match *match,
void *matchinfo,
- unsigned int matchsize,
unsigned int hook_mask)
{
- const struct ip6t_ip6 *ipv6 = entry;
const struct ip6t_icmp *icmpinfo = matchinfo;
- /* Must specify proto == ICMP, and no unknown invflags */
- return ipv6->proto == IPPROTO_ICMPV6
- && !(ipv6->invflags & IP6T_INV_PROTO)
- && matchsize == IP6T_ALIGN(sizeof(struct ip6t_icmp))
- && !(icmpinfo->invflags & ~IP6T_ICMP_INV);
+ /* Must specify no unknown invflags */
+ return !(icmpinfo->invflags & ~IP6T_ICMP_INV);
}
/* The built-in targets: standard (NULL) and error. */
static struct ip6t_target ip6t_standard_target = {
.name = IP6T_STANDARD_TARGET,
+ .targetsize = sizeof(int),
+ .family = AF_INET6,
};
static struct ip6t_target ip6t_error_target = {
.name = IP6T_ERROR_TARGET,
.target = ip6t_error,
+ .targetsize = IP6T_FUNCTION_MAXNAMELEN,
+ .family = AF_INET6,
};
static struct nf_sockopt_ops ip6t_sockopts = {
static struct ip6t_match icmp6_matchstruct = {
.name = "icmp6",
.match = &icmp6_match,
- .checkentry = &icmp6_checkentry,
+ .matchsize = sizeof(struct ip6t_icmp),
+ .checkentry = icmp6_checkentry,
+ .proto = IPPROTO_ICMPV6,
+ .family = AF_INET6,
};
-static int __init init(void)
+static int __init ip6_tables_init(void)
{
int ret;
- xt_proto_init(AF_INET6);
+ ret = xt_proto_init(AF_INET6);
+ if (ret < 0)
+ goto err1;
/* Noone else will be downing sem now, so we won't sleep */
- xt_register_target(AF_INET6, &ip6t_standard_target);
- xt_register_target(AF_INET6, &ip6t_error_target);
- xt_register_match(AF_INET6, &icmp6_matchstruct);
+ ret = xt_register_target(&ip6t_standard_target);
+ if (ret < 0)
+ goto err2;
+ ret = xt_register_target(&ip6t_error_target);
+ if (ret < 0)
+ goto err3;
+ ret = xt_register_match(&icmp6_matchstruct);
+ if (ret < 0)
+ goto err4;
/* Register setsockopt */
ret = nf_register_sockopt(&ip6t_sockopts);
- if (ret < 0) {
- duprintf("Unable to register sockopts.\n");
- xt_proto_fini(AF_INET6);
- return ret;
- }
+ if (ret < 0)
+ goto err5;
printk("ip6_tables: (C) 2000-2006 Netfilter Core Team\n");
return 0;
+
+err5:
+ xt_unregister_match(&icmp6_matchstruct);
+err4:
+ xt_unregister_target(&ip6t_error_target);
+err3:
+ xt_unregister_target(&ip6t_standard_target);
+err2:
+ xt_proto_fini(AF_INET6);
+err1:
+ return ret;
}
-static void __exit fini(void)
+static void __exit ip6_tables_fini(void)
{
nf_unregister_sockopt(&ip6t_sockopts);
- xt_unregister_match(AF_INET6, &icmp6_matchstruct);
- xt_unregister_target(AF_INET6, &ip6t_error_target);
- xt_unregister_target(AF_INET6, &ip6t_standard_target);
+ xt_unregister_match(&icmp6_matchstruct);
+ xt_unregister_target(&ip6t_error_target);
+ xt_unregister_target(&ip6t_standard_target);
xt_proto_fini(AF_INET6);
}
if (hp == NULL)
return -EBADMSG;
if (nexthdr == NEXTHDR_FRAGMENT) {
- unsigned short _frag_off, *fp;
+ unsigned short _frag_off;
+ __be16 *fp;
fp = skb_header_pointer(skb,
start+offsetof(struct frag_hdr,
frag_off),
if (_frag_off) {
if (target < 0 &&
((!ipv6_ext_hdr(hp->nexthdr)) ||
- nexthdr == NEXTHDR_NONE)) {
+ hp->nexthdr == NEXTHDR_NONE)) {
if (fragoff)
*fragoff = _frag_off;
return hp->nexthdr;
EXPORT_SYMBOL(ip6t_do_table);
EXPORT_SYMBOL(ip6t_ext_hdr);
EXPORT_SYMBOL(ipv6_find_hdr);
-EXPORT_SYMBOL(ip6_masked_addrcmp);
-module_init(init);
-module_exit(fini);
+module_init(ip6_tables_init);
+module_exit(ip6_tables_fini);
git://git.onelab.eu / linux-2.6.git / blobdiff