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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* 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 "debugger-tcp.h"
#include "jrt.h"
#ifdef JERRY_DEBUGGER
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
/**
* Implementation of transport over tcp/ip.
*/
typedef struct
{
jerry_debugger_transport_header_t header; /**< transport header */
int tcp_socket; /**< tcp socket */
} jerry_debugger_transport_tcp_t;
/**
* Log tcp error message.
*/
static void
jerry_debugger_tcp_log_error (void)
{
JERRY_ERROR_MSG ("Error: %s\n", strerror (errno));
} /* jerry_debugger_tcp_log_error */
/**
* Close a tcp connection.
*/
static void
jerry_debugger_tcp_close (jerry_debugger_transport_header_t *header_p) /**< tcp implementation */
{
JERRY_ASSERT (jerry_debugger_transport_is_connected ());
jerry_debugger_transport_tcp_t *tcp_p = (jerry_debugger_transport_tcp_t *) header_p;
JERRY_DEBUG_MSG ("TCP connection closed.\n");
close (tcp_p->tcp_socket);
jerry_debugger_transport_free ((void *) header_p, sizeof (jerry_debugger_transport_tcp_t));
} /* jerry_debugger_tcp_close */
/**
* Send data over a tcp connection.
*
* @return true - if the data has been sent successfully
* false - otherwise
*/
static bool
jerry_debugger_tcp_send (jerry_debugger_transport_header_t *header_p, /**< tcp implementation */
uint8_t *message_p, /**< message to be sent */
size_t message_length) /**< message length in bytes */
{
JERRY_ASSERT (jerry_debugger_transport_is_connected ());
jerry_debugger_transport_tcp_t *tcp_p = (jerry_debugger_transport_tcp_t *) header_p;
do
{
ssize_t sent_bytes = send (tcp_p->tcp_socket, message_p, message_length, 0);
if (sent_bytes < 0)
{
if (errno == EWOULDBLOCK)
{
continue;
}
jerry_debugger_tcp_log_error ();
jerry_debugger_transport_close ();
return false;
}
message_p += sent_bytes;
message_length -= (size_t) sent_bytes;
}
while (message_length > 0);
return true;
} /* jerry_debugger_tcp_send */
/**
* Receive data from a tcp connection.
*/
static bool
jerry_debugger_tcp_receive (jerry_debugger_transport_header_t *header_p, /**< tcp implementation */
jerry_debugger_transport_receive_context_t *receive_context_p) /**< receive context */
{
jerry_debugger_transport_tcp_t *tcp_p = (jerry_debugger_transport_tcp_t *) header_p;
uint8_t *buffer_p = receive_context_p->buffer_p + receive_context_p->received_length;
size_t buffer_size = JERRY_DEBUGGER_TRANSPORT_MAX_BUFFER_SIZE - receive_context_p->received_length;
ssize_t length = recv (tcp_p->tcp_socket, buffer_p, buffer_size, 0);
if (length < 0)
{
if (errno != EWOULDBLOCK)
{
jerry_debugger_tcp_log_error ();
jerry_debugger_transport_close ();
return false;
}
length = 0;
}
receive_context_p->received_length += (size_t) length;
if (receive_context_p->received_length > 0)
{
receive_context_p->message_p = receive_context_p->buffer_p;
receive_context_p->message_length = receive_context_p->received_length;
}
return true;
} /* jerry_debugger_tcp_receive */
/**
* Create a tcp connection.
*
* @return true if successful,
* false otherwise
*/
bool
jerry_debugger_tcp_create (uint16_t port) /**< listening port */
{
int server_socket;
struct sockaddr_in addr;
socklen_t sin_size = sizeof (struct sockaddr_in);
addr.sin_family = AF_INET;
addr.sin_port = htons (port);
addr.sin_addr.s_addr = INADDR_ANY;
if ((server_socket = socket (AF_INET, SOCK_STREAM, 0)) == -1)
{
JERRY_ERROR_MSG ("Error: %s\n", strerror (errno));
return false;
}
int opt_value = 1;
if (setsockopt (server_socket, SOL_SOCKET, SO_REUSEADDR, &opt_value, sizeof (int)) == -1)
{
close (server_socket);
JERRY_ERROR_MSG ("Error: %s\n", strerror (errno));
return false;
}
if (bind (server_socket, (struct sockaddr *)&addr, sizeof (struct sockaddr)) == -1)
{
close (server_socket);
JERRY_ERROR_MSG ("Error: %s\n", strerror (errno));
return false;
}
if (listen (server_socket, 1) == -1)
{
close (server_socket);
JERRY_ERROR_MSG ("Error: %s\n", strerror (errno));
return false;
}
JERRY_DEBUG_MSG ("Waiting for client connection\n");
int tcp_socket = accept (server_socket, (struct sockaddr *)&addr, &sin_size);
close (server_socket);
if (tcp_socket == -1)
{
JERRY_ERROR_MSG ("Error: %s\n", strerror (errno));
return false;
}
/* Set non-blocking mode. */
int socket_flags = fcntl (tcp_socket, F_GETFL, 0);
if (socket_flags < 0)
{
close (tcp_socket);
return false;
}
if (fcntl (tcp_socket, F_SETFL, socket_flags | O_NONBLOCK) == -1)
{
close (tcp_socket);
return false;
}
JERRY_DEBUG_MSG ("Connected from: %s\n", inet_ntoa (addr.sin_addr));
size_t size = sizeof (jerry_debugger_transport_tcp_t);
jerry_debugger_transport_header_t *header_p;
header_p = (jerry_debugger_transport_header_t *) jerry_debugger_transport_malloc (size);
if (!header_p)
{
close (tcp_socket);
return false;
}
header_p->close = jerry_debugger_tcp_close;
header_p->send = jerry_debugger_tcp_send;
header_p->receive = jerry_debugger_tcp_receive;
((jerry_debugger_transport_tcp_t *) header_p)->tcp_socket = tcp_socket;
jerry_debugger_transport_add (header_p,
0,
JERRY_DEBUGGER_TRANSPORT_MAX_BUFFER_SIZE,
0,
JERRY_DEBUGGER_TRANSPORT_MAX_BUFFER_SIZE);
return true;
} /* jerry_debugger_tcp_create */
#endif /* JERRY_DEBUGGER */
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