/*
 * Copyright (C) 2010 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.
 */

#include "jni.h"
#include <sys/socket.h>
#include "ScopedByteBufferArray.h"

// Convert from sockaddr_storage to Inet4Address (AF_INET) or Inet6Address (AF_INET6).
// If 'port' is non-NULL and the address family includes a notion
// of port number, *port will be set to the port number.
jobject sockaddrToInetAddress(JNIEnv* env, const sockaddr_storage& ss, int* port);

// Convert from InetAddress to sockaddr_storage. An Inet6Address will be converted to an
// AF_INET6 sockaddr_in6. An Inet4Address will be converted to an IPv4-mapped AF_INET6
// sockaddr_in6. This is what you want if you're about to perform an operation on a socket,
// since all our sockets are AF_INET6.
bool inetAddressToSockaddr(JNIEnv* env, jobject inetAddress, int port,
                           sockaddr_storage& ss, socklen_t& sa_len);

// Convert from InetAddress to sockaddr_storage. An Inet6Address will be converted to an
// AF_INET6 sockaddr_in6. An Inet4Address will be converted to a sockaddr_in. This is probably
// only useful for getnameinfo(2), where we'll be presenting the result to the user and the
// user may actually care whether the original address was pure IPv4 or an IPv4-mapped IPv6
// address, and for the MCAST_JOIN_GROUP, MCAST_LEAVE_GROUP, and other multicast socket
// options.
bool inetAddressToSockaddrVerbatim(JNIEnv* env, jobject inetAddress, int port,
                                   sockaddr_storage& ss, socklen_t& sa_len);

// Convert from StructMsghdr to msghdr,
// set all fields except msg_name which would be set outside since IPv4 fallback handled outside
bool msghdrJavaToC(JNIEnv* env, jobject structMsghdr, struct msghdr& mhdr,
                   ScopedByteBufferArray& scopedBufArray);

// Convert from msghdr to StructMsghdr,
// msg_iov/msg_control need to be set since they are output parameters;
bool msghdrCToJava(JNIEnv* env, jobject structMsghdr, struct msghdr& mhdr,
                   ScopedByteBufferArray& scopedBufArray);

// Changes 'fd' to be blocking/non-blocking. Returns false and sets errno on failure.
// @Deprecated - use IoUtils.setBlocking
bool setBlocking(int fd, bool blocking);