echo_server.h

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#ifndef _ECHO_SERVER_H
#define _ECHO_SERVER_H
 
//Dependencies
#include "core/net.h"
#include "core/socket.h"
 
//Echo server support
#ifndef ECHO_SERVER_SUPPORT
   #define ECHO_SERVER_SUPPORT DISABLED
#elif (ECHO_SERVER_SUPPORT != ENABLED && ECHO_SERVER_SUPPORT != DISABLED)
   #error ECHO_SERVER_SUPPORT parameter is not valid
#endif
 
//Stack size required to run the Echo server
#ifndef ECHO_SERVER_STACK_SIZE
   #define ECHO_SERVER_STACK_SIZE 500
#elif (ECHO_SERVER_STACK_SIZE < 1)
   #error ECHO_SERVER_STACK_SIZE parameter is not valid
#endif
 
//Priority at which the Echo server should run
#ifndef ECHO_SERVER_PRIORITY
   #define ECHO_SERVER_PRIORITY OS_TASK_PRIORITY_NORMAL
#endif
 
//TCP Echo service support
#ifndef ECHO_SERVER_TCP_SUPPORT
   #define ECHO_SERVER_TCP_SUPPORT ENABLED
#elif (ECHO_SERVER_TCP_SUPPORT != ENABLED && ECHO_SERVER_TCP_SUPPORT != DISABLED)
   #error ECHO_SERVER_TCP_SUPPORT parameter is not valid
#endif
 
//Maximum number of simultaneous TCP connections
#ifndef ECHO_SERVER_MAX_TCP_CONNECTIONS
   #define ECHO_SERVER_MAX_TCP_CONNECTIONS 2
#elif (ECHO_SERVER_MAX_TCP_CONNECTIONS < 1)
   #error ECHO_SERVER_MAX_TCP_CONNECTIONS parameter is not valid
#endif
 
//Size of the buffer for input/output operations (TCP)
#ifndef ECHO_SERVER_TCP_BUFFER_SIZE
   #define ECHO_SERVER_TCP_BUFFER_SIZE 512
#elif (ECHO_SERVER_TCP_BUFFER_SIZE < 1)
   #error ECHO_SERVER_TCP_BUFFER_SIZE parameter is not valid
#endif
 
//UDP Echo service support
#ifndef ECHO_SERVER_UDP_SUPPORT
   #define ECHO_SERVER_UDP_SUPPORT ENABLED
#elif (ECHO_SERVER_UDP_SUPPORT != ENABLED && ECHO_SERVER_UDP_SUPPORT != DISABLED)
   #error ECHO_SERVER_UDP_SUPPORT parameter is not valid
#endif
 
//Size of the buffer for input/output operations (UDP)
#ifndef ECHO_SERVER_UDP_BUFFER_SIZE
   #define ECHO_SERVER_UDP_BUFFER_SIZE 1472
#elif (ECHO_SERVER_UDP_BUFFER_SIZE < 1)
   #error ECHO_SERVER_UDP_BUFFER_SIZE parameter is not valid
#endif
 
//Idle connection timeout
#ifndef ECHO_SERVER_TIMEOUT
   #define ECHO_SERVER_TIMEOUT 30000
#elif (ECHO_SERVER_TIMEOUT < 1)
   #error ECHO_SERVER_TIMEOUT parameter is not valid
#endif
 
//Echo server tick interval
#ifndef ECHO_SERVER_TICK_INTERVAL
   #define ECHO_SERVER_TICK_INTERVAL 1000
#elif (ECHO_SERVER_TICK_INTERVAL < 100)
   #error ECHO_SERVER_TICK_INTERVAL parameter is not valid
#endif
 
//Application specific context
#ifndef ECHO_SERVER_PRIVATE_CONTEXT
   #define ECHO_SERVER_PRIVATE_CONTEXT
#endif
 
//Echo service port number
#define ECHO_PORT 7
 
//C++ guard
#ifdef __cplusplus
extern "C" {
#endif
 
 
typedef enum
{
   ECHO_TCP_CONNECTION_STATE_CLOSED = 0,
   ECHO_TCP_CONNECTION_STATE_OPEN   = 1
} EchoTcpConnectionState;
 
 
typedef struct
{
   NetInterface *interface; 
   uint16_t port;           
} EchoServerSettings;
 
 
typedef struct
{
   EchoTcpConnectionState state;               
   Socket *socket;                             
   systime_t timestamp;                        
   char_t buffer[ECHO_SERVER_TCP_BUFFER_SIZE]; 
   size_t bufferLen;                           
   size_t bufferPos;                           
} EchoTcpConnection;
 
 
typedef struct
{
   EchoServerSettings settings;                   
   bool_t running;                                
   bool_t stop;                                   
   OsEvent event;                                 
   OsTaskId taskId;                               
#if (OS_STATIC_TASK_SUPPORT == ENABLED)
   OsTaskTcb taskTcb;                             
   OsStackType taskStack[ECHO_SERVER_STACK_SIZE]; 
#endif
#if (ECHO_SERVER_TCP_SUPPORT == ENABLED)
   Socket *tcpSocket;                             
   EchoTcpConnection tcpConnection[ECHO_SERVER_MAX_TCP_CONNECTIONS]; 
#endif
#if (ECHO_SERVER_UDP_SUPPORT == ENABLED)
   Socket *udpSocket;                             
   char_t udpBuffer[ECHO_SERVER_UDP_BUFFER_SIZE]; 
#endif
   ECHO_SERVER_PRIVATE_CONTEXT                    
} EchoServerContext;
 
 
//Echo server related functions
void echoServerGetDefaultSettings(EchoServerSettings *settings);
 
error_t echoServerInit(EchoServerContext *context,
   const EchoServerSettings *settings);
 
error_t echoServerStart(EchoServerContext *context);
error_t echoServerStop(EchoServerContext *context);
 
void echoServerTask(EchoServerContext *context);
 
void echoServerDeinit(EchoServerContext *context);
 
//C++ guard
#ifdef __cplusplus
}
#endif
 
#endif