[NETFILTER]: arp_tables: move entry and target checks to seperate functions
Resync with ip_tables.c as preparation for compat support.
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
---
commit d0ccbefbca69eff49883e5ad964a5f13172aef0d
tree 2d3a2747325bc8b92b4e670031aef881bc056424
parent 23afc470858634c807b97379e0a7e8447463be27
author Patrick McHardy <kaber@xxxxxxxxx> Mon, 17 Dec 2007 14:58:11 +0100
committer Patrick McHardy <kaber@xxxxxxxxx> Tue, 18 Dec 2007 00:24:55 +0100
net/ipv4/netfilter/arp_tables.c | 58 ++++++++++++++++++++++++++++-----------
1 files changed, 41 insertions(+), 17 deletions(-)
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index cafb35a..b0f4331 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -435,12 +435,9 @@ static int mark_source_chains(struct xt_table_info *newinfo,
return 1;
}
-static inline int check_entry(struct arpt_entry *e, const char *name, unsigned int size,
- unsigned int *i)
+static inline int check_entry(struct arpt_entry *e, const char *name)
{
struct arpt_entry_target *t;
- struct arpt_target *target;
- int ret;
if (!arp_checkentry(&e->arp)) {
duprintf("arp_tables: arp check failed %p %s.\n", e, name);
@@ -454,30 +451,57 @@ static inline int check_entry(struct arpt_entry *e, const char *name, unsigned i
if (e->target_offset + t->u.target_size > e->next_offset)
return -EINVAL;
+ return 0;
+}
+
+static inline int check_target(struct arpt_entry *e, const char *name)
+{
+ struct arpt_entry_target *t;
+ struct arpt_target *target;
+ int ret;
+
+ t = arpt_get_target(e);
+ target = t->u.kernel.target;
+
+ ret = xt_check_target(target, NF_ARP, t->u.target_size - sizeof(*t),
+ name, e->comefrom, 0, 0);
+ if (!ret && t->u.kernel.target->checkentry
+ && !t->u.kernel.target->checkentry(name, e, target, t->data,
+ e->comefrom)) {
+ duprintf("arp_tables: check failed for `%s'.\n",
+ t->u.kernel.target->name);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+static inline int
+find_check_entry(struct arpt_entry *e, const char *name, unsigned int size,
+ unsigned int *i)
+{
+ struct arpt_entry_target *t;
+ struct arpt_target *target;
+ int ret;
+
+ ret = check_entry(e, name);
+ if (ret)
+ return ret;
+
+ t = arpt_get_target(e);
target = try_then_request_module(xt_find_target(NF_ARP, t->u.user.name,
t->u.user.revision),
"arpt_%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 out;
}
t->u.kernel.target = target;
- ret = xt_check_target(target, NF_ARP, t->u.target_size - sizeof(*t),
- name, e->comefrom, 0, 0);
+ 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("arp_tables: check failed for `%s'.\n",
- t->u.kernel.target->name);
- ret = -EINVAL;
- goto err;
- }
-
(*i)++;
return 0;
err:
@@ -611,7 +635,7 @@ static int translate_table(const char *name,
/* Finally, each sanity check must pass */
i = 0;
ret = ARPT_ENTRY_ITERATE(entry0, newinfo->size,
- check_entry, name, size, &i);
+ find_check_entry, name, size, &i);
if (ret != 0) {
ARPT_ENTRY_ITERATE(entry0, newinfo->size,
-
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