X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fnetwork%2Fres_send.c;h=9593164db0df4f0ee095f6677e95844217812248;hb=269d193820342dc109f39909d78fb30f4c978f76;hp=b9cea0bfd5663de2e5e2bd5aca618eec48f57354;hpb=5ce3737931bb411a8d167356d4d0287b53b0cbdc;p=musl

diff --git a/src/network/res_send.c b/src/network/res_send.c
index b9cea0bf..9593164d 100644
--- a/src/network/res_send.c
+++ b/src/network/res_send.c
@@ -1,9 +1,17 @@
 #include <resolv.h>
+#include <string.h>
 
 int __res_send(const unsigned char *msg, int msglen, unsigned char *answer, int anslen)
 {
-	int r = __res_msend(1, &msg, &msglen, &answer, &anslen, anslen);
-	return r<0 ? r : anslen;
+	int r;
+	if (anslen < 512) {
+		unsigned char buf[512];
+		r = __res_send(msg, msglen, buf, sizeof buf);
+		if (r >= 0) memcpy(answer, buf, r < anslen ? r : anslen);
+		return r;
+	}
+	r = __res_msend(1, &msg, &msglen, &answer, &anslen, anslen);
+	return r<0 || !anslen ? -1 : anslen;
 }
 
 weak_alias(__res_send, res_send);