void Java_com_apress_echo_EchoServerActivity_nativeStartUdpServer(
JNIEnv* env,
jobject obj,
jint port)
{
// Construct a new UDP socket.
int serverSocket = NewUdpSocket(env, obj);
if (NULL == env->ExceptionOccurred())
{
// Bind socket to a port number
BindSocketToPort(env, obj, serverSocket, (unsigned short) port);
if (NULL != env->ExceptionOccurred())
goto exit;
// If random port number is requested
if (0 == port)
{
// Get the port number socket is currently binded
GetSocketPort(env, obj, serverSocket);
if (NULL != env->ExceptionOccurred())
goto exit;
}
// Client address
struct sockaddr_in address;
memset(&address, 0, sizeof(address));
char buffer[MAX_BUFFER_SIZE];
ssize_t recvSize;
ssize_t sentSize;
// Receive from the socket
recvSize = ReceiveDatagramFromSocket(env, obj, serverSocket,
&address, buffer, MAX_BUFFER_SIZE);
if ((0 == recvSize) || (NULL != env->ExceptionOccurred()))
goto exit;
// Send to the socket
sentSize = SendDatagramToSocket(env, obj, serverSocket,
&address, buffer, (size_t) recvSize);
}
exit:
if (serverSocket > 0)
{
close(serverSocket);
}
}
JNIEXPORT void JNICALL Java_com_example_hellojni_Native_nativeStartTcpServer
(JNIEnv *env, jobject obj, jint port) {
// Construct a new TCP socket.
int serverSocket = NewTcpSocket(env, obj);
if (NULL == env->ExceptionOccurred())
{
// Bind socket to a port number
BindSocketToPort(env, obj, serverSocket, (unsigned short) port);
if (NULL != env->ExceptionOccurred())
goto exit;
// If random port number is requested
if (0 == port)
{
// Get the port number socket is currently binded
GetSocketPort(env, obj, serverSocket);
if (NULL != env->ExceptionOccurred())
goto exit;
}
// Listen on socket with a backlog of 4 pending connections
ListenOnSocket(env, obj, serverSocket, 4);
if (NULL != env->ExceptionOccurred())
goto exit;
// Accept a client connection on socket
int clientSocket = AcceptOnSocket(env, obj, serverSocket);
if (NULL != env->ExceptionOccurred())
goto exit;
char buffer[MAX_BUFFER_SIZE];
ssize_t recvSize;
ssize_t sentSize;
// Receive and send back the data
while (1)
{
// Receive from the socket
recvSize = ReceiveFromSocket(env, obj, clientSocket,
buffer, MAX_BUFFER_SIZE);
if ((0 == recvSize) || (NULL != env->ExceptionOccurred()))
break;
// Send to the socket
char prefix[] = "Server: ";
char toSend[MAX_BUFFER_SIZE + strlen(prefix)];
strcpy(toSend, prefix);
strcat(toSend, buffer);
sentSize = SendToSocket(env, obj, clientSocket,
toSend, (size_t) strlen(toSend));
if ((0 == sentSize) || (NULL != env->ExceptionOccurred()))
break;
}
// Close the client socket
close(clientSocket);
}
exit:
if (serverSocket > 0)
{
close(serverSocket);
}
}
void Java_com_apress_echo_EchoServerActivity_nativeStartTcpServer(
JNIEnv* env,
jobject obj,
jint port)
{
// Construct a new TCP socket.
int serverSocket = NewTcpSocket(env, obj);
if (NULL == env->ExceptionOccurred())
{
// Bind socket to a port number
BindSocketToPort(env, obj, serverSocket, (unsigned short) port);
if (NULL != env->ExceptionOccurred())
goto exit;
// If random port number is requested
if (0 == port)
{
// Get the port number socket is currently binded
GetSocketPort(env, obj, serverSocket);
if (NULL != env->ExceptionOccurred())
goto exit;
}
// Listen on socket with a backlog of 4 pending connections
ListenOnSocket(env, obj, serverSocket, 4);
if (NULL != env->ExceptionOccurred())
goto exit;
// Accept a client connection on socket
int clientSocket = AcceptOnSocket(env, obj, serverSocket);
if (NULL != env->ExceptionOccurred())
goto exit;
char buffer[MAX_BUFFER_SIZE];
ssize_t recvSize;
ssize_t sentSize;
// Receive and send back the data
while (1)
{
// Receive from the socket
recvSize = ReceiveFromSocket(env, obj, clientSocket,
buffer, MAX_BUFFER_SIZE);
if ((0 == recvSize) || (NULL != env->ExceptionOccurred()))
break;
// Send to the socket
sentSize = SendToSocket(env, obj, clientSocket,
buffer, (size_t) recvSize);
if ((0 == sentSize) || (NULL != env->ExceptionOccurred()))
break;
}
// Close the client socket
close(clientSocket);
}
exit:
if (serverSocket > 0)
{
close(serverSocket);
}
}
JNIEXPORT void JNICALL Java_com_example_hellojni_Native_nativeStartUdpServer
(JNIEnv *env, jobject obj, jint port)
{
// Construct a new UDP socket.
int serverSocket = NewUdpSocket(env, obj);
if (NULL == env->ExceptionOccurred())
{
LOGD("Create UDP Socket...");
// Bind socket to a port number
BindSocketToPort(env, obj, serverSocket, (unsigned short) port);
if (NULL != env->ExceptionOccurred())
goto exit;
// If random port number is requested
if (0 == port)
{
// Get the port number socket is currently binded
GetSocketPort(env, obj, serverSocket);
if (NULL != env->ExceptionOccurred())
goto exit;
}
struct sockaddr_in serv;
char serv_ip[20];
socklen_t serv_len = sizeof(serv);
getsockname(serverSocket, (struct sockaddr *)&serv, &serv_len);
inet_ntop(AF_INET, &serv.sin_addr, serv_ip, sizeof(serv_ip));
LogMessage(env, obj, "Server on %s:%d\n", serv_ip, ntohs(serv.sin_port));
// LogMessage(env, obj, "Server on %s:%d\n", serv_ip, ntohs(serv.sin_port));
while (1) {
// Client address
struct sockaddr_in address;
memset(&address, 0, sizeof(address));
char buffer[MAX_BUFFER_SIZE];
ssize_t recvSize;
ssize_t sentSize;
// Receive from the socket
recvSize = ReceiveDatagramFromSocket(env, obj, serverSocket,
&address, buffer, MAX_BUFFER_SIZE);
LOGD("Received from %s:%hu."
, inet_ntoa(address.sin_addr), ntohs(address.sin_port));
LOGD("Received %hu bytes: %s", recvSize, buffer);
// LogMessage(env, obj, "Received from %s:%hu"
// , inet_ntoa(address.sin_addr), ntohs(address.sin_port));
// LogMessage(env, obj, "Received %hu bytes: %s", recvSize, buffer);
if ((0 == recvSize) || (NULL != env->ExceptionOccurred()))
goto exit;
// Send to the socket
// combine data
char prefix[] = "Server: ";
char buffer2[MAX_BUFFER_SIZE + strlen(prefix)];
strcpy(buffer2, prefix);
strcat(buffer2, buffer);
sentSize = SendDatagramToSocket(env, obj, serverSocket,
&address, buffer2, (size_t) recvSize);
}
}
exit:
if (serverSocket > 0)
{
close(serverSocket);
}
}
