From bce16467708a050e1c88a010f7dfb370013e5ea6 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Sat, 6 May 2006 18:04:35 +0000
Subject: * include/arpa/nameser.h: Also optimize NS_PUT16 and NS_PUT32.

	* resolv/res_mkquery.c: Use NS_PUT16 and NS_PUT32 instead of __putshort
	and __putlong respectively.  Correct buffer overflow check for
	NS_NOTIFY_OP.

	* resolv/res_send.c (send_vc): Use ns_put16 instead of putshort.
---
 resolv/res_mkquery.c | 48 +++++++++++++++++++++---------------------------
 resolv/res_send.c    |  2 +-
 2 files changed, 22 insertions(+), 28 deletions(-)

(limited to 'resolv')

diff --git a/resolv/res_mkquery.c b/resolv/res_mkquery.c
index 815fcf8..4d98b8c 100644
--- a/resolv/res_mkquery.c
+++ b/resolv/res_mkquery.c
@@ -131,13 +131,13 @@ res_nmkquery(res_state statp,
 	int randombits;
 	do
 	  {
-#ifdef RANDOM_BITS
+# ifdef RANDOM_BITS
 	    RANDOM_BITS (randombits);
-#else
+# else
 	    struct timeval tv;
 	    __gettimeofday (&tv, NULL);
 	    randombits = (tv.tv_sec << 8) ^ tv.tv_usec;
-#endif
+# endif
 	  }
 	while ((randombits & 0xffff) == 0);
 	statp->id = (statp->id + randombits) & 0xffff;
@@ -155,38 +155,36 @@ res_nmkquery(res_state statp,
 	 * perform opcode specific processing
 	 */
 	switch (op) {
-	case QUERY:	/*FALLTHROUGH*/
 	case NS_NOTIFY_OP:
+		if ((buflen -= QFIXEDSZ + (data == NULL ? 0 : RRFIXEDSZ)) < 0)
+			return (-1);
+		goto compose;
+
+	case QUERY:
 		if ((buflen -= QFIXEDSZ) < 0)
 			return (-1);
+	compose:
 		if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
 			return (-1);
 		cp += n;
 		buflen -= n;
-		__putshort(type, cp);
-		cp += INT16SZ;
-		__putshort(class, cp);
-		cp += INT16SZ;
+		NS_PUT16 (type, cp);
+		NS_PUT16 (class, cp);
 		hp->qdcount = htons(1);
 		if (op == QUERY || data == NULL)
 			break;
 		/*
 		 * Make an additional record for completion domain.
 		 */
-		buflen -= RRFIXEDSZ;
 		n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);
-		if (n < 0)
+		if (__builtin_expect (n < 0, 0))
 			return (-1);
 		cp += n;
 		buflen -= n;
-		__putshort(T_NULL, cp);
-		cp += INT16SZ;
-		__putshort(class, cp);
-		cp += INT16SZ;
-		__putlong(0, cp);
-		cp += INT32SZ;
-		__putshort(0, cp);
-		cp += INT16SZ;
+		NS_PUT16 (T_NULL, cp);
+		NS_PUT16 (class, cp);
+		NS_PUT32 (0, cp);
+		NS_PUT16 (0, cp);
 		hp->arcount = htons(1);
 		break;
 
@@ -194,17 +192,13 @@ res_nmkquery(res_state statp,
 		/*
 		 * Initialize answer section
 		 */
-		if (buflen < 1 + RRFIXEDSZ + datalen)
+		if (__builtin_expect (buflen < 1 + RRFIXEDSZ + datalen, 0))
 			return (-1);
 		*cp++ = '\0';	/* no domain name */
-		__putshort(type, cp);
-		cp += INT16SZ;
-		__putshort(class, cp);
-		cp += INT16SZ;
-		__putlong(0, cp);
-		cp += INT32SZ;
-		__putshort(datalen, cp);
-		cp += INT16SZ;
+		NS_PUT16 (type, cp);
+		NS_PUT16 (class, cp);
+		NS_PUT32 (0, cp);
+		NS_PUT16 (datalen, cp);
 		if (datalen) {
 			memcpy(cp, data, datalen);
 			cp += datalen;
diff --git a/resolv/res_send.c b/resolv/res_send.c
index ebe4fbf..887d048 100644
--- a/resolv/res_send.c
+++ b/resolv/res_send.c
@@ -674,7 +674,7 @@ send_vc(res_state statp,
 	/*
 	 * Send length & message
 	 */
-	putshort((u_short)buflen, (u_char*)&len);
+	ns_put16((u_short)buflen, (u_char*)&len);
 	evConsIovec(&len, INT16SZ, &iov[0]);
 	evConsIovec((void*)buf, buflen, &iov[1]);
 	if (TEMP_FAILURE_RETRY (writev(statp->_vcsock, iov, 2))
-- 
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