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/**

 * \addtogroup httpd

 * @{

 */

/**

 * \file

 *         Web server script interface

 * \author

 *         Adam Dunkels <adam@sics.se>

 *

 */

/*

 * Copyright (c) 2001-2006, 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. 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: httpd-cgi.c 2 2011-07-17 20:13:17Z filepang@gmail.com $

 *

 */

#include "net/uip.h"

#include "net/psock.h"

#include "httpd.h"

#include "httpd-cgi.h"

#include "httpd-fs.h"

#include <stdio.h>

#include <string.h>

HTTPD_CGI_CALL( file, "file-stats", file_stats );

HTTPD_CGI_CALL( tcp, "tcp-connections", tcp_stats );

HTTPD_CGI_CALL( net, "net-stats", net_stats );

static const struct httpd_cgi_call      *calls[] = { &file, &tcp, &net, NULL };

/*---------------------------------------------------------------------------*/

static PT_THREAD( nullfunction ( struct httpd_state *s, char *ptr ) )

{

        PSOCK_BEGIN( &s->sout );

        PSOCK_END( &s->sout );

}

/*---------------------------------------------------------------------------*/

httpd_cgifunction httpd_cgi( char *name )

{

        const struct httpd_cgi_call **f;

        /* Find the matching name in the table, return the function. */

        for( f = calls; *f != NULL; ++f )

        {

                if( strncmp((*f)->name, name, strlen((*f)->name)) == 0 )

                {

                        return( *f )->function;

                }

        }

        return nullfunction;

}

/*---------------------------------------------------------------------------*/

static unsigned short generate_file_stats( void *arg )

{

        char    *f = ( char * ) arg;

        return snprintf( ( char * ) uip_appdata, UIP_APPDATA_SIZE, "%5u", httpd_fs_count(f) );

}

/*---------------------------------------------------------------------------*/

static PT_THREAD( file_stats ( struct httpd_state *s, char *ptr ) )

{

        PSOCK_BEGIN( &s->sout );

        PSOCK_GENERATOR_SEND( &s->sout, generate_file_stats, strchr(ptr, ' ') + 1 );

        PSOCK_END( &s->sout );

}

/*---------------------------------------------------------------------------*/

static const char       closed[] = /*  "CLOSED",*/ { 0x43, 0x4c, 0x4f, 0x53, 0x45, 0x44, 0 };

static const char       syn_rcvd[] = /*  "SYN-RCVD",*/ { 0x53, 0x59, 0x4e, 0x2d, 0x52, 0x43, 0x56, 0x44, 0 };

static const char       syn_sent[] = /*  "SYN-SENT",*/ { 0x53, 0x59, 0x4e, 0x2d, 0x53, 0x45, 0x4e, 0x54, 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, syn_sent, established, fin_wait_1, fin_wait_2, closing, time_wait, last_ack };

static unsigned short generate_tcp_stats( void *arg )

{

        struct uip_conn         *conn;

        struct httpd_state      *s = ( struct httpd_state * ) arg;

        conn = &uip_conns[s->count];

        return snprintf( ( char * ) uip_appdata, UIP_APPDATA_SIZE,

                                         "<tr><td>%d</td><td>%u.%u.%u.%u:%u</td><td>%s</td><td>%u</td><td>%u</td><td>%c %c</td></tr>\r\n", htons(conn->lport),

                                         htons(conn->ripaddr[0]) >> 8, htons(conn->ripaddr[0]) & 0xff, htons(conn->ripaddr[1]) >> 8,

                                         htons(conn->ripaddr[1]) & 0xff, htons(conn->rport), states[conn->tcpstateflags & UIP_TS_MASK], conn->nrtx, conn->timer,

                                         (uip_outstanding(conn)) ? '*' : ' ', (uip_stopped(conn)) ? '!' : ' ' );

}

/*---------------------------------------------------------------------------*/

static PT_THREAD( tcp_stats ( struct httpd_state *s, char *ptr ) )

{

        PSOCK_BEGIN( &s->sout );

        for( s->count = 0; s->count < UIP_CONNS; ++s->count )

        {

                if( (uip_conns[s->count].tcpstateflags & UIP_TS_MASK) != UIP_CLOSED )

                {

                        PSOCK_GENERATOR_SEND( &s->sout, generate_tcp_stats, s );

                }

        }

        PSOCK_END( &s->sout );

}

/*---------------------------------------------------------------------------*/

static unsigned short generate_net_stats( void *arg )

{

        struct httpd_state      *s = ( struct httpd_state * ) arg;

        return snprintf( ( char * ) uip_appdata, UIP_APPDATA_SIZE, "%5u\n", (( uip_stats_t * ) &uip_stat)[s->count] );

}

static PT_THREAD( net_stats ( struct httpd_state *s, char *ptr ) )

{

        PSOCK_BEGIN( &s->sout );

#if UIP_STATISTICS

        for( s->count = 0; s->count < sizeof(uip_stat) / sizeof(uip_stats_t); ++s->count )

        {

                PSOCK_GENERATOR_SEND( &s->sout, generate_net_stats, s );

        }

#endif /* UIP_STATISTICS */

        PSOCK_END( &s->sout );

}

/*---------------------------------------------------------------------------*/

/** @} */