110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_MULTINETWORK_H
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#define ANDROID_MULTINETWORK_H
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#include <netdb.h>
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#include <stdlib.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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/**
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* The corresponding C type for android.net.Network#getNetworkHandle() return
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* values. The Java signed long value can be safely cast to a net_handle_t:
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*
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* [C] ((net_handle_t) java_long_network_handle)
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* [C++] static_cast<net_handle_t>(java_long_network_handle)
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*
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* as appropriate.
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*/
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typedef uint64_t net_handle_t;
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/**
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* The value NETWORK_UNSPECIFIED indicates no specific network.
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*
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* For some functions (documented below), a previous binding may be cleared
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* by an invocation with NETWORK_UNSPECIFIED.
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*
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* Depending on the context it may indicate an error. It is expressly
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* not used to indicate some notion of the "current default network".
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*/
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#define NETWORK_UNSPECIFIED ((net_handle_t)0)
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/**
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* All functions below that return an int return 0 on success or -1
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* on failure with an appropriate errno value set.
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*/
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/**
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* Set the network to be used by the given socket file descriptor.
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*
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* To clear a previous socket binding invoke with NETWORK_UNSPECIFIED.
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*
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* This is the equivalent of:
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*
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* [ android.net.Network#bindSocket() ]
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* https://developer.android.com/reference/android/net/Network.html#bindSocket(java.net.Socket)
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*/
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int android_setsocknetwork(net_handle_t network, int fd);
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/**
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* Binds the current process to |network|. All sockets created in the future
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* (and not explicitly bound via android_setsocknetwork()) will be bound to
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* |network|. All host name resolutions will be limited to |network| as well.
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* Note that if the network identified by |network| ever disconnects, all
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* sockets created in this way will cease to work and all host name
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* resolutions will fail. This is by design so an application doesn't
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* accidentally use sockets it thinks are still bound to a particular network.
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*
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* To clear a previous process binding invoke with NETWORK_UNSPECIFIED.
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*
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* This is the equivalent of:
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*
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* [ android.net.ConnectivityManager#setProcessDefaultNetwork() ]
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* https://developer.android.com/reference/android/net/ConnectivityManager.html#setProcessDefaultNetwork(android.net.Network)
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*/
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int android_setprocnetwork(net_handle_t network);
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/**
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* Perform hostname resolution via the DNS servers associated with |network|.
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*
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* All arguments (apart from |network|) are used identically as those passed
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* to getaddrinfo(3). Return and error values are identical to those of
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* getaddrinfo(3), and in particular gai_strerror(3) can be used as expected.
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* Similar to getaddrinfo(3):
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* - |hints| may be NULL (in which case man page documented defaults apply)
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* - either |node| or |service| may be NULL, but not both
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* - |res| must not be NULL
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*
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* This is the equivalent of:
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*
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* [ android.net.Network#getAllByName() ]
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* https://developer.android.com/reference/android/net/Network.html#getAllByName(java.lang.String)
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*/
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int android_getaddrinfofornetwork(net_handle_t network,
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const char *node, const char *service,
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const struct addrinfo *hints, struct addrinfo **res);
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__END_DECLS
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#endif // ANDROID_MULTINETWORK_H
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