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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
#ifndef ANDROID_MULTINETWORK_H
#define ANDROID_MULTINETWORK_H
#include <netdb.h>
#include <stdlib.h>
#include <sys/cdefs.h>
__BEGIN_DECLS
/**
* The corresponding C type for android.net.Network#getNetworkHandle() return
* values. The Java signed long value can be safely cast to a net_handle_t:
*
* [C] ((net_handle_t) java_long_network_handle)
* [C++] static_cast<net_handle_t>(java_long_network_handle)
*
* as appropriate.
*/
typedef uint64_t net_handle_t;
/**
* The value NETWORK_UNSPECIFIED indicates no specific network.
*
* For some functions (documented below), a previous binding may be cleared
* by an invocation with NETWORK_UNSPECIFIED.
*
* Depending on the context it may indicate an error. It is expressly
* not used to indicate some notion of the "current default network".
*/
#define NETWORK_UNSPECIFIED ((net_handle_t)0)
/**
* All functions below that return an int return 0 on success or -1
* on failure with an appropriate errno value set.
*/
/**
* Set the network to be used by the given socket file descriptor.
*
* To clear a previous socket binding invoke with NETWORK_UNSPECIFIED.
*
* This is the equivalent of:
*
* [ android.net.Network#bindSocket() ]
* https://developer.android.com/reference/android/net/Network.html#bindSocket(java.net.Socket)
*/
int android_setsocknetwork(net_handle_t network, int fd);
/**
* Binds the current process to |network|. All sockets created in the future
* (and not explicitly bound via android_setsocknetwork()) will be bound to
* |network|. All host name resolutions will be limited to |network| as well.
* Note that if the network identified by |network| ever disconnects, all
* sockets created in this way will cease to work and all host name
* resolutions will fail. This is by design so an application doesn't
* accidentally use sockets it thinks are still bound to a particular network.
*
* To clear a previous process binding invoke with NETWORK_UNSPECIFIED.
*
* This is the equivalent of:
*
* [ android.net.ConnectivityManager#setProcessDefaultNetwork() ]
* https://developer.android.com/reference/android/net/ConnectivityManager.html#setProcessDefaultNetwork(android.net.Network)
*/
int android_setprocnetwork(net_handle_t network);
/**
* Perform hostname resolution via the DNS servers associated with |network|.
*
* All arguments (apart from |network|) are used identically as those passed
* to getaddrinfo(3). Return and error values are identical to those of
* getaddrinfo(3), and in particular gai_strerror(3) can be used as expected.
* Similar to getaddrinfo(3):
* - |hints| may be NULL (in which case man page documented defaults apply)
* - either |node| or |service| may be NULL, but not both
* - |res| must not be NULL
*
* This is the equivalent of:
*
* [ android.net.Network#getAllByName() ]
* https://developer.android.com/reference/android/net/Network.html#getAllByName(java.lang.String)
*/
int android_getaddrinfofornetwork(net_handle_t network,
const char *node, const char *service,
const struct addrinfo *hints, struct addrinfo **res);
__END_DECLS
#endif // ANDROID_MULTINETWORK_H
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