!878 避免ipv6使用

Merge pull request !878 from fangting/master

musl_template.gni

@@ -154,6 +154,7 @@ template("musl_libs") {
       defines += [
         "OHOS_DNS_PROXY_BY_NETSYS=1",
         "OHOS_PERMISSION_INTERNET=1",
+        "STANDARD_SYSTEM",
       ]
     }
 

porting/linux/user/src/network/lookup_name.c

@@ -152,7 +152,11 @@ static int name_from_dns(struct address buf[static MAXADDRS], char canon[static
 		{ .af = AF_INET, .rr = RR_AAAA },
 	};
 
+#ifdef STANDARD_SYSTEM
+	for (i=0; i<1; i++) {
+#else
 	for (i=0; i<2; i++) {
+#endif
 		if (family != afrr[i].af) {
 			qlens[nq] = __res_mkquery(0, name, 1, afrr[i].rr,
 				0, 0, 0, qbuf[nq], sizeof *qbuf);