From 9f5673174161cc026a6c87f70d9b457e7ad82a80 Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Tue, 23 Mar 2010 17:40:13 +0100 Subject: [PATCH] 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 --- net/netfilter/xt_dccp.c | 10 +++++++--- net/netfilter/xt_sctp.c | 20 ++++++++++++-------- 2 files changed, 19 insertions(+), 11 deletions(-) diff --git a/net/netfilter/xt_dccp.c b/net/netfilter/xt_dccp.c index 0989f29ade2e..8f6014f7c881 100644 --- a/net/netfilter/xt_dccp.c +++ b/net/netfilter/xt_dccp.c @@ -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 = { diff --git a/net/netfilter/xt_sctp.c b/net/netfilter/xt_sctp.c index 43c7e1de532c..977b182dea59 100644 --- a/net/netfilter/xt_sctp.c +++ b/net/netfilter/xt_sctp.c @@ -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 = { -- 2.20.1