cgi.c

一个适用于嵌入式系统的小型TCP/IP源程序

/*
 * Copyright (c) 2001, Adam Dunkels.
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Adam Dunkels.
 * 4. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.  
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
 *
 * This file is part of the uIP TCP/IP stack.
 *
 * $Id: cgi.c,v 1.14 2001/11/25 18:48:38 adam Exp $
 *
 */

/*
 * This file includes functions that are called by the web server
 * scripts. The functions takes no argument, and the return value is
 * interpreted as follows. A zero means that the function did not
 * complete and should be invoked for the next packet as well. A
 * non-zero value indicates that the function has completed and that
 * the web server should move along to the next script line.
 *
 */

#include "uip.h"
#include "cgi.h"
#include "httpd.h"
#include "fs.h"

#include <stdio.h>
#include <string.h>

static u8_t print_stats(void);
static u8_t file_stats(void);
static u8_t tcp_stats(void);

cgifunction cgitab[] = {
  print_stats,   /* CGI function "a" */
  file_stats,    /* CGI function "b" */
  tcp_stats      /* CGI function "c" */
};

static const char closed[] =   /*  "CLOSED",*/
{0x43, 0x4c, 0x4f, 0x53, 0x45, 0x44, 0};
static const char syn_rcvd[] = /*  "SYN-RCVD",*/
{0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49, 
 0x54, 0x2d, 0x31, 0};
static const char established[] = /*  "ESTABLISHED",*/
{0x45, 0x53, 0x54, 0x41, 0x42, 0x4c, 0x49, 0x53, 0x48, 
 0x45, 0x44, 0};
static const char fin_wait_1[] = /*  "FIN-WAIT-1",*/
{0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49, 
 0x54, 0x2d, 0x31, 0};
static const char fin_wait_2[] = /*  "FIN-WAIT-2",*/
{0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49, 
 0x54, 0x2d, 0x32, 0};
static const char closing[] = /*  "CLOSING",*/
{0x43, 0x4c, 0x4f, 0x53, 0x49, 
 0x4e, 0x47, 0};
static const char time_wait[] = /*  "TIME-WAIT,"*/
{0x54, 0x49, 0x4d, 0x45, 0x2d, 0x57, 0x41, 
 0x49, 0x54, 0};
static const char last_ack[] = /*  "LAST-ACK"*/
{0x4c, 0x41, 0x53, 0x54, 0x2d, 0x41, 0x43, 
 0x4b, 0};

static const char *states[] = {
  closed,
  syn_rcvd,
  established,
  fin_wait_1,
  fin_wait_2,
  closing,
  time_wait,
  last_ack};
  

/*-----------------------------------------------------------------------------------*/
static u8_t
print_stats(void)
{
  u16_t i, j;
  u8_t *buf;
  u16_t *databytes;

  if(uip_flags & UIP_ACKDATA) {
    hs->count = hs->count + 4;
    if(hs->count >= sizeof(struct uip_stats)/sizeof(u16_t)) {
      return 1;
    }
  }
  
  databytes = (u16_t *)&uip_stat + hs->count;
  buf       = (u8_t *)uip_appdata;

  j = 4 + 1;
  i = hs->count;
  while (i < sizeof(struct uip_stats)/sizeof(u16_t) && --j > 0) {
    sprintf((char *)buf, "%5u\r\n", *databytes);
    ++databytes;
    buf += 6;
    ++i;
  }

  uip_len = buf - uip_appdata;  
  
  return 0;
}
/*-----------------------------------------------------------------------------------*/
static u8_t
file_stats(void)
{  
  if(uip_flags & UIP_ACKDATA) {
    return 1;
  }

  sprintf((char *)uip_appdata, "%d", fs_count(&hs->script[4]));
  uip_len = strlen((char *)uip_appdata);

  return 0;
}
/*-----------------------------------------------------------------------------------*/
static u8_t
tcp_stats(void)
{
  struct uip_conn *conn;

  if(uip_flags & UIP_ACKDATA) {
    if(++hs->count == UIP_CONNS) {
      return 1;
    }
  }
  
  conn = &uip_conns[hs->count];
  if((conn->tcpstateflags & TS_MASK) == CLOSED) {
    uip_len = sprintf((char *)uip_appdata, "<tr align=\"center\"><td>-</td><td>-</td><td>%d</td><td>%d</td><td>%c</td></tr>\r\n",
		      conn->nrtx,
		      conn->timer,
		      (conn->tcpstateflags & UIP_OUTSTANDING)? '*':' ');
  } else {
    uip_len = sprintf((char *)uip_appdata, "<tr align=\"center\"><td>%d.%d.%d.%d:%d</td><td>%s</td><td>%d</td><td>%d</td><td>%c</td></tr>\r\n",
		      ntohs(conn->ripaddr[0]) >> 8,
		      ntohs(conn->ripaddr[0]) & 0xff,
		      ntohs(conn->ripaddr[1]) >> 8,
		      ntohs(conn->ripaddr[1]) & 0xff,
		      ntohs(conn->rport),
		      states[conn->tcpstateflags & TS_MASK],
		      conn->nrtx,
		      conn->timer,
		      (conn->tcpstateflags & UIP_OUTSTANDING)? '*':' '); 
  }
  return 0;
}
/*-----------------------------------------------------------------------------------*/