From 8f135d1eb63b3477a85d54bc359dacafd0558649 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Caletka?= <ondrej@caletka.cz>
Date: Sat, 20 Jul 2013 22:52:25 +0200
Subject: [PATCH] Removed unnecessary comments, debugs and whitespace.

---
 libxt_dns.c |  5 ++---
 xt_dns.c    | 14 ++------------
 xt_dns.h    |  3 ---
 3 files changed, 4 insertions(+), 18 deletions(-)

diff --git a/libxt_dns.c b/libxt_dns.c
index 241918b..bbbd7b8 100644
--- a/libxt_dns.c
+++ b/libxt_dns.c
@@ -200,7 +200,7 @@ static int dns_parse(int c, char **argv, int invert, unsigned int *flags,
 		if (invert)
 			info->invert_flags |= XT_DNS_QTYPE;
 		return true;
-		break;
+
 	case '4': /* edns0 */
 		if (*flags & XT_DNS_EDNS0)
 			xtables_error(PARAMETER_PROBLEM, "xt_dns: "
@@ -210,6 +210,7 @@ static int dns_parse(int c, char **argv, int invert, unsigned int *flags,
 		if (invert)
 			info->invert_flags |= XT_DNS_EDNS0;
 		return true;
+
 	case '5': /* bufsize */
 		if (*flags & XT_DNS_BUFSIZE)
 			xtables_error(PARAMETER_PROBLEM, "xt_dns: "
@@ -230,7 +231,6 @@ static void dns_print(const void *ip, const struct xt_entry_match *match, int nu
 	struct xt_dns_info *info = (void *) match->data;
 	const char *name;
 	
-	
 	printf(S1"dns"S2);
 	if (info->flags & XT_DNS_QUERY) {
 		printf("%s",S1);
@@ -341,4 +341,3 @@ void _init(void)
 	xtables_register_match(&dns_match);
 	xtables_register_match(&dns_match6);
 }
-
diff --git a/xt_dns.c b/xt_dns.c
index cf8e601..dd34bd5 100644
--- a/xt_dns.c
+++ b/xt_dns.c
@@ -38,11 +38,8 @@ void debug_dump_buf(u8 *dns, size_t len, size_t offset, char *title) {
 #define debug_dump_buf(dns, len, offset, title)
 #endif
 
-
-// uncomment following line if you get compilation error
-//#define HAVE_XT_MATCH_PARAM
-
 #define MAX_MTU 2000
+static u8 pktbuf[MAX_MTU]; /* buffer for whole packet in case skb is fragmented */
 
 static bool skip_name(u8 *dns, size_t len, size_t *offset) {
 	/* skip labels */
@@ -80,8 +77,6 @@ static bool skip_rr(u8 *dns, size_t len, size_t *offset) {
 	return false;
 }
 
-static u8 pktbuf[MAX_MTU]; /* buffer for whole packet in case skb is fragmented */
-
 #ifdef HAVE_XT_MATCH_PARAM
 static bool dns_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 #else
@@ -114,8 +109,6 @@ static bool dns_mt(const struct sk_buff *skb, struct xt_action_param *par)
 		pr_warn(KBUILD_MODNAME": skb_header_pointer failed!\n");
 		return false;
 	}
-	/*dns = skb->data + (par->thoff + sizeof(struct udphdr));
-	len = skb_headlen(skb) - (par->thoff + sizeof(struct udphdr));*/
 
 	/* minimum DNS query payload is 17 bytes (for "." root zone) */
 	if (len < 17)
@@ -159,8 +152,6 @@ static bool dns_mt(const struct sk_buff *skb, struct xt_action_param *par)
 		if (!is_match)
 			goto qtype_out;
 
-	
-	
 		/* match if type=info->type, class IN */
 		is_match = (dns[offset-4] == 0x00) && (dns[offset-3] == info->qtype)
 			&& (dns[offset-2] == 0x00) && (dns[offset-2] == 0x01);
@@ -184,7 +175,6 @@ static bool dns_mt(const struct sk_buff *skb, struct xt_action_param *par)
 		}
 		if (!is_match)
 			goto edns0_out;
-		debug_dump_buf(dns, len, offset, "after_query");
 
 		/* skip answer and authority sections */
 		for (i=0; i<(counts[1]+counts[2]); i++) {
@@ -203,7 +193,7 @@ static bool dns_mt(const struct sk_buff *skb, struct xt_action_param *par)
 			if (!is_match)
 				break;
 		}
-		if (!is_match || i == counts[3]) {
+		if (!is_match || (i == counts[3])) {
 			is_match = false;
 			goto edns0_out;
 		}
diff --git a/xt_dns.h b/xt_dns.h
index f537232..5100450 100644
--- a/xt_dns.h
+++ b/xt_dns.h
@@ -28,7 +28,4 @@ struct xt_dns_info {
 	u_int16_t bufsize[2];	/* edns0 bufsize [min:max] */
 };
 
-
-
 #endif
-