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netfilter: xtables: untangle spaghetti if clauses in checkentry 

As I'm changing the return values soon, I want to have a clear visual
path.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
This commit is contained in:
Jan Engelhardt 2010-03-23 17:40:13 +01:00
parent 7911b5c75b
commit 9f56731741
2 changed files with 19 additions and 11 deletions
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10
net/netfilter/xt_dccp.c
View File

@ -127,9 +127,13 @@ static bool dccp_mt_check(const struct xt_mtchk_param *par)
{
const struct xt_dccp_info *info = par->matchinfo;
return !(info->flags & ~XT_DCCP_VALID_FLAGS)
&& !(info->invflags & ~XT_DCCP_VALID_FLAGS)
&& !(info->invflags & ~info->flags);
if (info->flags & ~XT_DCCP_VALID_FLAGS)
return false;
if (info->invflags & ~XT_DCCP_VALID_FLAGS)
return false;
if (info->invflags & ~info->flags)
return false;
return true;
}
static struct xt_match dccp_mt_reg[] __read_mostly = {

20
net/netfilter/xt_sctp.c
View File

@ -148,14 +148,18 @@ static bool sctp_mt_check(const struct xt_mtchk_param *par)
{
const struct xt_sctp_info *info = par->matchinfo;
return !(info->flags & ~XT_SCTP_VALID_FLAGS)
&& !(info->invflags & ~XT_SCTP_VALID_FLAGS)
&& !(info->invflags & ~info->flags)
&& ((!(info->flags & XT_SCTP_CHUNK_TYPES)) ||
(info->chunk_match_type &
(SCTP_CHUNK_MATCH_ALL
| SCTP_CHUNK_MATCH_ANY
| SCTP_CHUNK_MATCH_ONLY)));
if (info->flags & ~XT_SCTP_VALID_FLAGS)
return false;
if (info->invflags & ~XT_SCTP_VALID_FLAGS)
return false;
if (info->invflags & ~info->flags)
return false;
if (!(info->flags & XT_SCTP_CHUNK_TYPES))
return true;
if (info->chunk_match_type & (SCTP_CHUNK_MATCH_ALL |
SCTP_CHUNK_MATCH_ANY | SCTP_CHUNK_MATCH_ONLY))
return true;
return false;
}
static struct xt_match sctp_mt_reg[] __read_mostly = {