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authorTaehee Yoo <ap420073@gmail.com>2018-04-13 23:09:58 +0900
committerPablo Neira Ayuso <pablo@netfilter.org>2018-04-24 10:29:18 +0200
commita1d768f1a00db556e2aae9f92bdb38671e601da5 (patch)
treed9c8c68352823ceaf11d1c9f594d3a1af874affb /net/bridge
parent4351bef053c0335dca1b1ae140384712c0e35e41 (diff)
netfilter: ebtables: add ebt_get_target and ebt_get_target_c
ebt_get_target similar to {ip/ip6/arp}t_get_target. and ebt_get_target_c similar to {ip/ip6/arp}t_get_target_c. Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/netfilter/ebtables.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 7c07221369c0..9be240129448 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -177,6 +177,12 @@ struct ebt_entry *ebt_next_entry(const struct ebt_entry *entry)
return (void *)entry + entry->next_offset;
}
+static inline const struct ebt_entry_target *
+ebt_get_target_c(const struct ebt_entry *e)
+{
+ return ebt_get_target((struct ebt_entry *)e);
+}
+
/* Do some firewalling */
unsigned int ebt_do_table(struct sk_buff *skb,
const struct nf_hook_state *state,
@@ -230,8 +236,7 @@ unsigned int ebt_do_table(struct sk_buff *skb,
*/
EBT_WATCHER_ITERATE(point, ebt_do_watcher, skb, &acpar);
- t = (struct ebt_entry_target *)
- (((char *)point) + point->target_offset);
+ t = ebt_get_target_c(point);
/* standard target */
if (!t->u.target->target)
verdict = ((struct ebt_standard_target *)t)->verdict;
@@ -637,7 +642,7 @@ ebt_cleanup_entry(struct ebt_entry *e, struct net *net, unsigned int *cnt)
return 1;
EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, net, NULL);
EBT_MATCH_ITERATE(e, ebt_cleanup_match, net, NULL);
- t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+ t = ebt_get_target(e);
par.net = net;
par.target = t->u.target;
@@ -716,7 +721,7 @@ ebt_check_entry(struct ebt_entry *e, struct net *net,
ret = EBT_WATCHER_ITERATE(e, ebt_check_watcher, &tgpar, &j);
if (ret != 0)
goto cleanup_watchers;
- t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+ t = ebt_get_target(e);
gap = e->next_offset - e->target_offset;
target = xt_request_find_target(NFPROTO_BRIDGE, t->u.name, 0);
@@ -789,8 +794,7 @@ static int check_chainloops(const struct ebt_entries *chain, struct ebt_cl_stack
if (pos == nentries)
continue;
}
- t = (struct ebt_entry_target *)
- (((char *)e) + e->target_offset);
+ t = ebt_get_target_c(e);
if (strcmp(t->u.name, EBT_STANDARD_TARGET))
goto letscontinue;
if (e->target_offset + sizeof(struct ebt_standard_target) >
@@ -1396,7 +1400,7 @@ static inline int ebt_entry_to_user(struct ebt_entry *e, const char *base,
return -EFAULT;
hlp = ubase + (((char *)e + e->target_offset) - base);
- t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+ t = ebt_get_target_c(e);
ret = EBT_MATCH_ITERATE(e, ebt_match_to_user, base, ubase);
if (ret != 0)
@@ -1737,7 +1741,7 @@ static int compat_copy_entry_to_user(struct ebt_entry *e, void __user **dstptr,
return ret;
target_offset = e->target_offset - (origsize - *size);
- t = (struct ebt_entry_target *) ((char *) e + e->target_offset);
+ t = ebt_get_target(e);
ret = compat_target_to_user(t, dstptr, size);
if (ret)
@@ -1785,7 +1789,7 @@ static int compat_calc_entry(const struct ebt_entry *e,
EBT_MATCH_ITERATE(e, compat_calc_match, &off);
EBT_WATCHER_ITERATE(e, compat_calc_watcher, &off);
- t = (const struct ebt_entry_target *) ((char *) e + e->target_offset);
+ t = ebt_get_target_c(e);
off += xt_compat_target_offset(t->u.target);
off += ebt_compat_entry_padsize();