2 * Copyright (C) 2015 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #include <android/multinetwork.h>
20 #include <NetdClient.h> // the functions that communicate with netd
21 #include <resolv_netid.h> // android_getaddrinfofornet()
23 #include <sys/limits.h>
26 static int getnetidfromhandle(net_handle_t handle, unsigned *netid) {
27 static const uint32_t k32BitMask = 0xffffffff;
28 // This value MUST be kept in sync with the corresponding value in
29 // the android.net.Network#getNetworkHandle() implementation.
30 static const uint32_t kHandleMagic = 0xfacade;
32 // Check for minimum acceptable version of the API in the low bits.
33 if (handle != NETWORK_UNSPECIFIED &&
34 (handle & k32BitMask) != kHandleMagic) {
39 *netid = ((handle >> (CHAR_BIT * sizeof(k32BitMask))) & k32BitMask);
45 int android_setsocknetwork(net_handle_t network, int fd) {
47 if (!getnetidfromhandle(network, &netid)) {
52 int rval = setNetworkForSocket(netid, fd);
60 int android_setprocnetwork(net_handle_t network) {
62 if (!getnetidfromhandle(network, &netid)) {
67 int rval = setNetworkForProcess(netid);
75 int android_getaddrinfofornetwork(net_handle_t network,
76 const char *node, const char *service,
77 const struct addrinfo *hints, struct addrinfo **res) {
79 if (!getnetidfromhandle(network, &netid)) {
84 return android_getaddrinfofornet(node, service, hints, netid, 0, res);