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/*
* 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 <stdio.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#define LOG_TAG "RtpStream"
#include <utils/Log.h>
#include "jni.h"
#include "JNIHelp.h"
extern int parse(JNIEnv *env, jstring jAddress, int port, sockaddr_storage *ss);
namespace {
jfieldID gNative;
jint create(JNIEnv *env, jobject thiz, jstring jAddress)
{
env->SetIntField(thiz, gNative, -1);
sockaddr_storage ss;
if (parse(env, jAddress, 0, &ss) < 0) {
// Exception already thrown.
return -1;
}
int socket = ::socket(ss.ss_family, SOCK_DGRAM, 0);
socklen_t len = sizeof(ss);
if (socket == -1 || bind(socket, (sockaddr *)&ss, sizeof(ss)) != 0 ||
getsockname(socket, (sockaddr *)&ss, &len) != 0) {
jniThrowException(env, "java/net/SocketException", strerror(errno));
::close(socket);
return -1;
}
uint16_t *p = (ss.ss_family == AF_INET) ?
&((sockaddr_in *)&ss)->sin_port : &((sockaddr_in6 *)&ss)->sin6_port;
uint16_t port = ntohs(*p);
if ((port & 1) == 0) {
env->SetIntField(thiz, gNative, socket);
return port;
}
::close(socket);
socket = ::socket(ss.ss_family, SOCK_DGRAM, 0);
if (socket != -1) {
uint16_t delta = port << 1;
++port;
for (int i = 0; i < 1000; ++i) {
do {
port += delta;
} while (port < 1024);
*p = htons(port);
if (bind(socket, (sockaddr *)&ss, sizeof(ss)) == 0) {
env->SetIntField(thiz, gNative, socket);
return port;
}
}
}
jniThrowException(env, "java/net/SocketException", strerror(errno));
::close(socket);
return -1;
}
jint dup(JNIEnv *env, jobject thiz)
{
int socket = ::dup(env->GetIntField(thiz, gNative));
if (socket == -1) {
jniThrowException(env, "java/lang/IllegalStateException", strerror(errno));
}
return socket;
}
void close(JNIEnv *env, jobject thiz)
{
int socket = env->GetIntField(thiz, gNative);
::close(socket);
env->SetIntField(thiz, gNative, -1);
}
JNINativeMethod gMethods[] = {
{"create", "(Ljava/lang/String;)I", (void *)create},
{"dup", "()I", (void *)dup},
{"close", "()V", (void *)close},
};
} // namespace
int registerRtpStream(JNIEnv *env)
{
jclass clazz;
if ((clazz = env->FindClass("android/net/rtp/RtpStream")) == NULL ||
(gNative = env->GetFieldID(clazz, "mNative", "I")) == NULL ||
env->RegisterNatives(clazz, gMethods, NELEM(gMethods)) < 0) {
ALOGE("JNI registration failed");
return -1;
}
return 0;
}
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