1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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. 15 */ 16 17 #ifndef ANDROID_MULTINETWORK_H 18 #define ANDROID_MULTINETWORK_H 19 20 #include <netdb.h> 21 #include <stdlib.h> 22 #include <sys/cdefs.h> 23 24 __BEGIN_DECLS 25 26 /** 27 * The corresponding C type for android.net.Network#getNetworkHandle() return 28 * values. The Java signed long value can be safely cast to a net_handle_t: 29 * 30 * [C] ((net_handle_t) java_long_network_handle) 31 * [C++] static_cast<net_handle_t>(java_long_network_handle) 32 * 33 * as appropriate. 34 */ 35 typedef uint64_t net_handle_t; 36 37 /** 38 * The value NETWORK_UNSPECIFIED indicates no specific network. 39 * 40 * For some functions (documented below), a previous binding may be cleared 41 * by an invocation with NETWORK_UNSPECIFIED. 42 * 43 * Depending on the context it may indicate an error. It is expressly 44 * not used to indicate some notion of the "current default network". 45 */ 46 #define NETWORK_UNSPECIFIED ((net_handle_t)0) 47 48 49 /** 50 * All functions below that return an int return 0 on success or -1 51 * on failure with an appropriate errno value set. 52 */ 53 54 55 /** 56 * Set the network to be used by the given socket file descriptor. 57 * 58 * To clear a previous socket binding invoke with NETWORK_UNSPECIFIED. 59 * 60 * This is the equivalent of: 61 * 62 * [ android.net.Network#bindSocket() ] 63 * https://developer.android.com/reference/android/net/Network.html#bindSocket(java.net.Socket) 64 */ 65 int android_setsocknetwork(net_handle_t network, int fd); 66 67 68 /** 69 * Binds the current process to |network|. All sockets created in the future 70 * (and not explicitly bound via android_setsocknetwork()) will be bound to 71 * |network|. All host name resolutions will be limited to |network| as well. 72 * Note that if the network identified by |network| ever disconnects, all 73 * sockets created in this way will cease to work and all host name 74 * resolutions will fail. This is by design so an application doesn't 75 * accidentally use sockets it thinks are still bound to a particular network. 76 * 77 * To clear a previous process binding invoke with NETWORK_UNSPECIFIED. 78 * 79 * This is the equivalent of: 80 * 81 * [ android.net.ConnectivityManager#setProcessDefaultNetwork() ] 82 * https://developer.android.com/reference/android/net/ConnectivityManager.html#setProcessDefaultNetwork(android.net.Network) 83 */ 84 int android_setprocnetwork(net_handle_t network); 85 86 87 /** 88 * Perform hostname resolution via the DNS servers associated with |network|. 89 * 90 * All arguments (apart from |network|) are used identically as those passed 91 * to getaddrinfo(3). Return and error values are identical to those of 92 * getaddrinfo(3), and in particular gai_strerror(3) can be used as expected. 93 * Similar to getaddrinfo(3): 94 * - |hints| may be NULL (in which case man page documented defaults apply) 95 * - either |node| or |service| may be NULL, but not both 96 * - |res| must not be NULL 97 * 98 * This is the equivalent of: 99 * 100 * [ android.net.Network#getAllByName() ] 101 * https://developer.android.com/reference/android/net/Network.html#getAllByName(java.lang.String) 102 */ 103 int android_getaddrinfofornetwork(net_handle_t network, 104 const char *node, const char *service, 105 const struct addrinfo *hints, struct addrinfo **res); 106 107 __END_DECLS 108 109 #endif // ANDROID_MULTINETWORK_H 110
