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Message-Id: <1421267689-24894-3-git-send-email-pablo@netfilter.org>
Date: Wed, 14 Jan 2015 21:34:43 +0100
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 2/8] netfilter: xt_osf: Use continue to reduce indentation
From: Joe Perches <joe@...ches.com>
Invert logic in test to use continue.
This routine already uses continue, use it a bit more to
minimize > 80 column long lines and unnecessary indentation.
No change in compiled object file.
Other miscellanea:
o Remove trailing whitespace
o Realign arguments to multiline statement
Signed-off-by: Joe Perches <joe@...ches.com>
Acked-by: Evgeniy Polyakov <zbr@...emap.net>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
net/netfilter/xt_osf.c | 169 ++++++++++++++++++++++++------------------------
1 file changed, 85 insertions(+), 84 deletions(-)
diff --git a/net/netfilter/xt_osf.c b/net/netfilter/xt_osf.c
index c529161..0778855 100644
--- a/net/netfilter/xt_osf.c
+++ b/net/netfilter/xt_osf.c
@@ -225,6 +225,8 @@ xt_osf_match_packet(const struct sk_buff *skb, struct xt_action_param *p)
rcu_read_lock();
list_for_each_entry_rcu(kf, &xt_osf_fingers[df], finger_entry) {
+ int foptsize, optnum;
+
f = &kf->finger;
if (!(info->flags & XT_OSF_LOG) && strcmp(info->genre, f->genre))
@@ -233,110 +235,109 @@ xt_osf_match_packet(const struct sk_buff *skb, struct xt_action_param *p)
optp = _optp;
fmatch = FMATCH_WRONG;
- if (totlen == f->ss && xt_osf_ttl(skb, info, f->ttl)) {
- int foptsize, optnum;
+ if (totlen != f->ss || !xt_osf_ttl(skb, info, f->ttl))
+ continue;
- /*
- * Should not happen if userspace parser was written correctly.
- */
- if (f->wss.wc >= OSF_WSS_MAX)
- continue;
+ /*
+ * Should not happen if userspace parser was written correctly.
+ */
+ if (f->wss.wc >= OSF_WSS_MAX)
+ continue;
- /* Check options */
+ /* Check options */
- foptsize = 0;
- for (optnum = 0; optnum < f->opt_num; ++optnum)
- foptsize += f->opt[optnum].length;
+ foptsize = 0;
+ for (optnum = 0; optnum < f->opt_num; ++optnum)
+ foptsize += f->opt[optnum].length;
- if (foptsize > MAX_IPOPTLEN ||
- optsize > MAX_IPOPTLEN ||
- optsize != foptsize)
- continue;
+ if (foptsize > MAX_IPOPTLEN ||
+ optsize > MAX_IPOPTLEN ||
+ optsize != foptsize)
+ continue;
- check_WSS = f->wss.wc;
+ check_WSS = f->wss.wc;
- for (optnum = 0; optnum < f->opt_num; ++optnum) {
- if (f->opt[optnum].kind == (*optp)) {
- __u32 len = f->opt[optnum].length;
- const __u8 *optend = optp + len;
- int loop_cont = 0;
+ for (optnum = 0; optnum < f->opt_num; ++optnum) {
+ if (f->opt[optnum].kind == (*optp)) {
+ __u32 len = f->opt[optnum].length;
+ const __u8 *optend = optp + len;
+ int loop_cont = 0;
- fmatch = FMATCH_OK;
+ fmatch = FMATCH_OK;
- switch (*optp) {
- case OSFOPT_MSS:
- mss = optp[3];
- mss <<= 8;
- mss |= optp[2];
+ switch (*optp) {
+ case OSFOPT_MSS:
+ mss = optp[3];
+ mss <<= 8;
+ mss |= optp[2];
- mss = ntohs((__force __be16)mss);
- break;
- case OSFOPT_TS:
- loop_cont = 1;
- break;
- }
+ mss = ntohs((__force __be16)mss);
+ break;
+ case OSFOPT_TS:
+ loop_cont = 1;
+ break;
+ }
- optp = optend;
- } else
- fmatch = FMATCH_OPT_WRONG;
+ optp = optend;
+ } else
+ fmatch = FMATCH_OPT_WRONG;
- if (fmatch != FMATCH_OK)
- break;
- }
+ if (fmatch != FMATCH_OK)
+ break;
+ }
- if (fmatch != FMATCH_OPT_WRONG) {
- fmatch = FMATCH_WRONG;
+ if (fmatch != FMATCH_OPT_WRONG) {
+ fmatch = FMATCH_WRONG;
- switch (check_WSS) {
- case OSF_WSS_PLAIN:
- if (f->wss.val == 0 || window == f->wss.val)
- fmatch = FMATCH_OK;
- break;
- case OSF_WSS_MSS:
- /*
- * Some smart modems decrease mangle MSS to
- * SMART_MSS_2, so we check standard, decreased
- * and the one provided in the fingerprint MSS
- * values.
- */
+ switch (check_WSS) {
+ case OSF_WSS_PLAIN:
+ if (f->wss.val == 0 || window == f->wss.val)
+ fmatch = FMATCH_OK;
+ break;
+ case OSF_WSS_MSS:
+ /*
+ * Some smart modems decrease mangle MSS to
+ * SMART_MSS_2, so we check standard, decreased
+ * and the one provided in the fingerprint MSS
+ * values.
+ */
#define SMART_MSS_1 1460
#define SMART_MSS_2 1448
- if (window == f->wss.val * mss ||
- window == f->wss.val * SMART_MSS_1 ||
- window == f->wss.val * SMART_MSS_2)
- fmatch = FMATCH_OK;
- break;
- case OSF_WSS_MTU:
- if (window == f->wss.val * (mss + 40) ||
- window == f->wss.val * (SMART_MSS_1 + 40) ||
- window == f->wss.val * (SMART_MSS_2 + 40))
- fmatch = FMATCH_OK;
- break;
- case OSF_WSS_MODULO:
- if ((window % f->wss.val) == 0)
- fmatch = FMATCH_OK;
- break;
- }
+ if (window == f->wss.val * mss ||
+ window == f->wss.val * SMART_MSS_1 ||
+ window == f->wss.val * SMART_MSS_2)
+ fmatch = FMATCH_OK;
+ break;
+ case OSF_WSS_MTU:
+ if (window == f->wss.val * (mss + 40) ||
+ window == f->wss.val * (SMART_MSS_1 + 40) ||
+ window == f->wss.val * (SMART_MSS_2 + 40))
+ fmatch = FMATCH_OK;
+ break;
+ case OSF_WSS_MODULO:
+ if ((window % f->wss.val) == 0)
+ fmatch = FMATCH_OK;
+ break;
}
+ }
- if (fmatch != FMATCH_OK)
- continue;
+ if (fmatch != FMATCH_OK)
+ continue;
- fcount++;
+ fcount++;
- if (info->flags & XT_OSF_LOG)
- nf_log_packet(net, p->family, p->hooknum, skb,
- p->in, p->out, NULL,
- "%s [%s:%s] : %pI4:%d -> %pI4:%d hops=%d\n",
- f->genre, f->version, f->subtype,
- &ip->saddr, ntohs(tcp->source),
- &ip->daddr, ntohs(tcp->dest),
- f->ttl - ip->ttl);
+ if (info->flags & XT_OSF_LOG)
+ nf_log_packet(net, p->family, p->hooknum, skb,
+ p->in, p->out, NULL,
+ "%s [%s:%s] : %pI4:%d -> %pI4:%d hops=%d\n",
+ f->genre, f->version, f->subtype,
+ &ip->saddr, ntohs(tcp->source),
+ &ip->daddr, ntohs(tcp->dest),
+ f->ttl - ip->ttl);
- if ((info->flags & XT_OSF_LOG) &&
- info->loglevel == XT_OSF_LOGLEVEL_FIRST)
- break;
- }
+ if ((info->flags & XT_OSF_LOG) &&
+ info->loglevel == XT_OSF_LOGLEVEL_FIRST)
+ break;
}
rcu_read_unlock();
--
1.7.10.4
--
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