124 lines
3.3 KiB
C++
124 lines
3.3 KiB
C++
/*
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* Copyright (C) 2010 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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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#define LOG_TAG "RtpStream"
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#include <utils/Log.h>
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#include "jni.h"
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#include "JNIHelp.h"
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extern int parse(JNIEnv *env, jstring jAddress, int port, sockaddr_storage *ss);
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namespace {
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jfieldID gNative;
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jint create(JNIEnv *env, jobject thiz, jstring jAddress)
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{
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env->SetIntField(thiz, gNative, -1);
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sockaddr_storage ss;
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if (parse(env, jAddress, 0, &ss) < 0) {
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// Exception already thrown.
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return -1;
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}
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int socket = ::socket(ss.ss_family, SOCK_DGRAM, 0);
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socklen_t len = sizeof(ss);
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if (socket == -1 || bind(socket, (sockaddr *)&ss, sizeof(ss)) != 0 ||
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getsockname(socket, (sockaddr *)&ss, &len) != 0) {
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jniThrowException(env, "java/net/SocketException", strerror(errno));
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::close(socket);
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return -1;
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}
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uint16_t *p = (ss.ss_family == AF_INET) ?
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&((sockaddr_in *)&ss)->sin_port : &((sockaddr_in6 *)&ss)->sin6_port;
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uint16_t port = ntohs(*p);
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if ((port & 1) == 0) {
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env->SetIntField(thiz, gNative, socket);
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return port;
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}
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::close(socket);
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socket = ::socket(ss.ss_family, SOCK_DGRAM, 0);
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if (socket != -1) {
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uint16_t delta = port << 1;
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++port;
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for (int i = 0; i < 1000; ++i) {
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do {
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port += delta;
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} while (port < 1024);
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*p = htons(port);
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if (bind(socket, (sockaddr *)&ss, sizeof(ss)) == 0) {
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env->SetIntField(thiz, gNative, socket);
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return port;
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}
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}
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}
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jniThrowException(env, "java/net/SocketException", strerror(errno));
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::close(socket);
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return -1;
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}
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jint dup(JNIEnv *env, jobject thiz)
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{
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int socket = ::dup(env->GetIntField(thiz, gNative));
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if (socket == -1) {
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jniThrowException(env, "java/lang/IllegalStateException", strerror(errno));
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}
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return socket;
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}
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void close(JNIEnv *env, jobject thiz)
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{
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int socket = env->GetIntField(thiz, gNative);
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::close(socket);
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env->SetIntField(thiz, gNative, -1);
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}
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JNINativeMethod gMethods[] = {
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{"create", "(Ljava/lang/String;)I", (void *)create},
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{"dup", "()I", (void *)dup},
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{"close", "()V", (void *)close},
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};
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} // namespace
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int registerRtpStream(JNIEnv *env)
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{
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jclass clazz;
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if ((clazz = env->FindClass("android/net/rtp/RtpStream")) == NULL ||
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(gNative = env->GetFieldID(clazz, "mNative", "I")) == NULL ||
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env->RegisterNatives(clazz, gMethods, NELEM(gMethods)) < 0) {
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LOGE("JNI registration failed");
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return -1;
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}
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return 0;
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}
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