From: Vsevolod Stakhov <vsevolod@rambler-co.ru>
Date: Fri, 18 Feb 2011 15:40:46 +0000 (+0300)
Subject: Optimize DNS parsing.
X-Git-Tag: 0.3.7~23
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=c22c8be47f7ef8e3018dbb301f65f512b4e83535;p=rspamd.git

Optimize DNS parsing.

Suggested by: Igor Sysoev
---

diff --git a/src/dns.c b/src/dns.c
index 4070c4905..82c796c1e 100644
--- a/src/dns.c
+++ b/src/dns.c
@@ -755,8 +755,8 @@ end:
 	return TRUE;
 }
 
-#define GET16(x) do {if (*remain < sizeof (guint16)) {goto err;} memcpy (&(x), p, sizeof (guint16)); (x) = ntohs ((x)); p += sizeof (guint16); *remain -= sizeof (guint16); } while(0)
-#define GET32(x) do {if (*remain < sizeof (guint32)) {goto err;} memcpy (&(x), p, sizeof (guint32)); (x) = ntohl ((x)); p += sizeof (guint32); *remain -= sizeof (guint32); } while(0)
+#define GET16(x) do {(x) = ((*p) << 8) + *(p + 1); p += sizeof (guint16); *remain -= sizeof (guint16); } while(0)
+#define GET32(x) do {(x) = ((*p) << 24) + ((*(p + 1)) << 16) + ((*(p + 2)) << 8) + *(p + 3); p += sizeof (guint32); *remain -= sizeof (guint32); } while(0)
 
 static gint
 dns_parse_rr (guint8 *in, union rspamd_reply_element *elt, guint8 **pos, struct rspamd_dns_reply *rep, gint *remain)