[Feature][ZXW-237]merge P54U03 version
Only Configure: No
Affected branch: master
Affected module: unknow
Is it affected on both ZXIC and MTK: only ZXIC
Self-test: Yes
Doc Update: No
Change-Id: Id39ef8b992af691eab09c01d4ea26da89e5f4049
diff --git a/ap/app/clatd/dns64.c b/ap/app/clatd/dns64.c
new file mode 100755
index 0000000..3a287cf
--- /dev/null
+++ b/ap/app/clatd/dns64.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2011 Daniel Drown
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * dns64.c - find the nat64 prefix with a dns64 lookup
+ */
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <strings.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "dns64.h"
+#include "logging.h"
+//#include "NetdClient.h"
+//#include "resolv_netid.h"
+#include "my_header.h"
+
+/* function: plat_prefix
+ * looks up an ipv4-only hostname and looks for a nat64 /96 prefix, returns 1 on success, 0 on failure
+ * ipv4_name - name to lookup
+ * net_id - (optional) netId to use, NETID_UNSET indicates use of default network
+ * prefix - the plat /96 prefix
+ */
+int plat_prefix(const char *ipv4_name, unsigned net_id, struct in6_addr *prefix) {
+ const struct addrinfo hints = {
+ .ai_family = AF_INET6,
+ };
+ int status;
+ struct addrinfo *result = NULL;
+ struct in6_addr plat_addr;
+ char plat_addr_str[INET6_ADDRSTRLEN];
+
+ logmsg(ANDROID_LOG_INFO, "Detecting NAT64 prefix from DNS...");
+
+ // Be sure to query local DNS64 servers, bypassing Private DNS (if enabled).
+ if (net_id != NETID_UNSET) {
+ net_id |= NETID_USE_LOCAL_NAMESERVERS;
+ }
+
+ //status = android_getaddrinfofornet(ipv4_name, NULL, &hints, net_id, MARK_UNSET, &result);
+ status = getaddrinfo(ipv4_name, NULL, &hints, &result);
+
+ if (status != 0 || result == NULL) {
+ logmsg(ANDROID_LOG_ERROR, "plat_prefix/dns(%s) status = %d/%s",
+ ipv4_name, status, gai_strerror(status));
+ return 0;
+ }
+
+ // Use only the first result. If other records are present, possibly with
+ // differing DNS64 prefixes they are ignored (there is very little sensible
+ // that could be done with them at this time anyway).
+
+ if (result->ai_family != AF_INET6) {
+ logmsg(ANDROID_LOG_WARN, "plat_prefix/unexpected address family: %d", result->ai_family);
+ return 0;
+ }
+ plat_addr = ((struct sockaddr_in6 *)result->ai_addr)->sin6_addr;
+ // Only /96 DNS64 prefixes are supported at this time.
+ plat_addr.s6_addr32[3] = 0;
+ freeaddrinfo(result);
+
+ logmsg(ANDROID_LOG_INFO, "Detected NAT64 prefix %s/96",
+ inet_ntop(AF_INET6, &plat_addr, plat_addr_str, sizeof(plat_addr_str)));
+ *prefix = plat_addr;
+ return 1;
+}