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[EBTABLES]: Move more stuff into ebt_verify_pointers(). 

Take intialization of ->hook_entry[...], ->entries_size and ->nentries
over there, pull the check for empty chains into the end of that sucker.

Now it's self-contained, so we can move it up in the very beginning of
translate_table() *and* we can rely on ->hook_entry[] being properly
transliterated after it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro 2006-11-30 19:26:35 -08:00 committed by David S. Miller
parent 70fe9af47e
commit e4fd77deac
1 changed files with 19 additions and 19 deletions
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38
net/bridge/netfilter/ebtables.c
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@ -401,6 +401,12 @@ static int ebt_verify_pointers(struct ebt_replace *repl,
unsigned int offset = 0;
int i;
for (i = 0; i < NF_BR_NUMHOOKS; i++)
newinfo->hook_entry[i] = NULL;
newinfo->entries_size = repl->entries_size;
newinfo->nentries = repl->nentries;
while (offset < limit) {
size_t left = limit - offset;
struct ebt_entry *e = (void *)newinfo->entries + offset;
@ -440,6 +446,15 @@ static int ebt_verify_pointers(struct ebt_replace *repl,
BUGPRINT("entries_size too small\n");
return -EINVAL;
}
/* check if all valid hooks have a chain */
for (i = 0; i < NF_BR_NUMHOOKS; i++) {
if (!newinfo->hook_entry[i] &&
(valid_hooks & (1 << i))) {
BUGPRINT("Valid hook without chain\n");
return -EINVAL;
}
}
return 0;
}
@ -772,6 +787,10 @@ static int translate_table(struct ebt_replace *repl,
int ret;
struct ebt_cl_stack *cl_s = NULL; /* used in the checking for chain loops */
ret = ebt_verify_pointers(repl, newinfo);
if (ret != 0)
return ret;
i = 0;
while (i < NF_BR_NUMHOOKS && !(repl->valid_hooks & (1 << i)))
i++;
@ -795,16 +814,6 @@ static int translate_table(struct ebt_replace *repl,
i = j;
}
for (i = 0; i < NF_BR_NUMHOOKS; i++)
newinfo->hook_entry[i] = NULL;
newinfo->entries_size = repl->entries_size;
newinfo->nentries = repl->nentries;
ret = ebt_verify_pointers(repl, newinfo);
if (ret != 0)
return ret;
/* do some early checkings and initialize some things */
i = 0; /* holds the expected nr. of entries for the chain */
j = 0; /* holds the up to now counted entries for the chain */
@ -829,15 +838,6 @@ static int translate_table(struct ebt_replace *repl,
return -EINVAL;
}
/* check if all valid hooks have a chain */
for (i = 0; i < NF_BR_NUMHOOKS; i++) {
if (newinfo->hook_entry[i] == NULL &&
(repl->valid_hooks & (1 << i))) {
BUGPRINT("Valid hook without chain\n");
return -EINVAL;
}
}
/* get the location of the udc, put them in an array
while we're at it, allocate the chainstack */
if (udc_cnt) {