example.c

基于S3C44B0X芯片的UIP网络协议栈的设计源代码

#include "example.h"
#include "uip.h"
#include <string.h>

/*
 * Declaration of the protosocket function that handles the connection
 * (defined at the end of the code).
 */
static int handle_connection(struct example_state *s);
/*---------------------------------------------------------------------------*/
/*
 * The initialization function. We must explicitly call this function
 * from the system initialization code, some time after uip_init() is
 * called.
 */
void
example_init(void)
{
  /* We start to listen for connections on TCP port 1000. */
  uip_listen(HTONS(1000));
}
/*---------------------------------------------------------------------------*/
/*
 * In hello-world.h we have defined the UIP_APPCALL macro to
 * hello_world_appcall so that this funcion is uIP's application
 * function. This function is called whenever an uIP event occurs
 * (e.g. when a new connection is established, new data arrives, sent
 * data is acknowledged, data needs to be retransmitted, etc.).
 */
void
example_appcall(void)
{
  /*
   * The uip_conn structure has a field called "appstate" that holds
   * the application state of the connection. We make a pointer to
   * this to access it easier.
   */
  struct example_state *s = &(uip_conn->appstate);
  unsigned char testbuf[200];
  int i;
  for(i=0;i<200;i++)
  		testbuf[i]=0x55;
 
  
  /*
   * If a new connection was just established, we should initialize
   * the protosocket in our applications' state structure.
   */
  if(uip_connected()) {
   // PSOCK_INIT(&s->p, s->inputbuffer, sizeof(s->inputbuffer));
      uip_send("Welcome!\n", 9);
  }

  /*
   * Finally, we run the protosocket function that actually handles
   * the communication. We pass it a pointer to the application state
   * of the current connection.
   */
   if(uip_acked() && s->state == WELCOME_SENT) {
			s->state = WELCOME_ACKED;
		}
   if(uip_newdata()) {
			//uip_send("ok\n", 3);
			
			uip_send("\nok\n", 4);
			
		}
	if(uip_rexmit()) {
				switch(s->state) {
						case WELCOME_SENT:
							uip_send("Welcome!\n", 9);
							break;
						case WELCOME_ACKED:
							uip_send("ok\n", 3);
							break;
								}
					 }
   
   
//  handle_connection(s);
}
/*---------------------------------------------------------------------------*/
/*
 * This is the protosocket function that handles the communication. A
 * protosocket function must always return an int, but must never
 * explicitly return - all return statements are hidden in the PSOCK
 * macros.
 */
/*static int
handle_connection(struct hello_world_state *s)
{
  PSOCK_BEGIN(&s->p);

  PSOCK_SEND_STR(&s->p, "Hello. What is your name?\n");
  PSOCK_READTO(&s->p, '\n');
  strncpy(s->name, s->inputbuffer, sizeof(s->name));
  PSOCK_SEND_STR(&s->p, "Hello ");
  PSOCK_SEND_STR(&s->p, s->name);
  PSOCK_CLOSE(&s->p);
  
  PSOCK_END(&s->p);
}*/
/*---------------------------------------------------------------------------*/