[NETFILTER]: ip6_tables: move entry, match and target checks to seperate functions
Resync with ip_tables.c as preparation for compat support.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index b73e6b6..655c221 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -607,11 +607,55 @@
}
static inline int
-check_match(struct ip6t_entry_match *m,
- const char *name,
- const struct ip6t_ip6 *ipv6,
- unsigned int hookmask,
- unsigned int *i)
+check_entry(struct ip6t_entry *e, const char *name)
+{
+ struct ip6t_entry_target *t;
+
+ if (!ip6_checkentry(&e->ipv6)) {
+ duprintf("ip_tables: ip check failed %p %s.\n", e, name);
+ return -EINVAL;
+ }
+
+ if (e->target_offset + sizeof(struct ip6t_entry_target) >
+ e->next_offset)
+ return -EINVAL;
+
+ t = ip6t_get_target(e);
+ if (e->target_offset + t->u.target_size > e->next_offset)
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline int check_match(struct ip6t_entry_match *m, const char *name,
+ const struct ip6t_ip6 *ipv6,
+ unsigned int hookmask, unsigned int *i)
+{
+ struct xt_match *match;
+ int ret;
+
+ match = m->u.kernel.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 && m->u.kernel.match->checkentry
+ && !m->u.kernel.match->checkentry(name, ipv6, match, m->data,
+ hookmask)) {
+ duprintf("ip_tables: check failed for `%s'.\n",
+ m->u.kernel.match->name);
+ ret = -EINVAL;
+ }
+ if (!ret)
+ (*i)++;
+ return ret;
+}
+
+static inline int
+find_check_match(struct ip6t_entry_match *m,
+ const char *name,
+ const struct ip6t_ip6 *ipv6,
+ unsigned int hookmask,
+ unsigned int *i)
{
struct xt_match *match;
int ret;
@@ -620,86 +664,77 @@
m->u.user.revision),
"ip6t_%s", m->u.user.name);
if (IS_ERR(match) || !match) {
- duprintf("check_match: `%s' not found\n", m->u.user.name);
+ duprintf("find_check_match: `%s' not found\n", m->u.user.name);
return match ? PTR_ERR(match) : -ENOENT;
}
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);
+ ret = check_match(m, name, ipv6, hookmask, i);
if (ret)
goto err;
- if (m->u.kernel.match->checkentry
- && !m->u.kernel.match->checkentry(name, ipv6, match, m->data,
- hookmask)) {
- duprintf("ip_tables: check failed for `%s'.\n",
- m->u.kernel.match->name);
- ret = -EINVAL;
- goto err;
- }
-
- (*i)++;
return 0;
err:
module_put(m->u.kernel.match->me);
return ret;
}
+static inline int check_target(struct ip6t_entry *e, const char *name)
+{
+ struct ip6t_entry_target *t;
+ struct xt_target *target;
+ int ret;
+
+ t = ip6t_get_target(e);
+ target = t->u.kernel.target;
+ 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 && t->u.kernel.target->checkentry
+ && !t->u.kernel.target->checkentry(name, e, target, t->data,
+ e->comefrom)) {
+ duprintf("ip_tables: check failed for `%s'.\n",
+ t->u.kernel.target->name);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
static inline int
-check_entry(struct ip6t_entry *e, const char *name, unsigned int size,
- unsigned int *i)
+find_check_entry(struct ip6t_entry *e, const char *name, unsigned int size,
+ unsigned int *i)
{
struct ip6t_entry_target *t;
struct xt_target *target;
int ret;
unsigned int j;
- if (!ip6_checkentry(&e->ipv6)) {
- duprintf("ip_tables: ip check failed %p %s.\n", e, name);
- return -EINVAL;
- }
-
- if (e->target_offset + sizeof(struct ip6t_entry_target) >
- e->next_offset)
- return -EINVAL;
+ ret = check_entry(e, name);
+ if (ret)
+ return ret;
j = 0;
- ret = IP6T_MATCH_ITERATE(e, check_match, name, &e->ipv6, e->comefrom, &j);
+ ret = IP6T_MATCH_ITERATE(e, find_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),
"ip6t_%s", t->u.user.name);
if (IS_ERR(target) || !target) {
- duprintf("check_entry: `%s' not found\n", t->u.user.name);
+ duprintf("find_check_entry: `%s' not found\n", t->u.user.name);
ret = target ? PTR_ERR(target) : -ENOENT;
goto cleanup_matches;
}
t->u.kernel.target = target;
- 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);
+ ret = check_target(e, name);
if (ret)
goto err;
- if (t->u.kernel.target->checkentry
- && !t->u.kernel.target->checkentry(name, e, target, t->data,
- e->comefrom)) {
- duprintf("ip_tables: check failed for `%s'.\n",
- t->u.kernel.target->name);
- ret = -EINVAL;
- goto err;
- }
-
(*i)++;
return 0;
err:
@@ -834,7 +869,7 @@
/* Finally, each sanity check must pass */
i = 0;
ret = IP6T_ENTRY_ITERATE(entry0, newinfo->size,
- check_entry, name, size, &i);
+ find_check_entry, name, size, &i);
if (ret != 0) {
IP6T_ENTRY_ITERATE(entry0, newinfo->size,