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/* =================================================================

 *

 *      monitor.c

 *

 *      An HTTP system monitor

 *

 * =================================================================

 * ####ECOSGPLCOPYRIGHTBEGIN####

 * -------------------------------------------

 * This file is part of eCos, the Embedded Configurable Operating System.

 * Copyright (C) 2002, 2003 Free Software Foundation, Inc.

 *

 * eCos is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free

 * Software Foundation; either version 2 or (at your option) any later

 * version.

 *

 * eCos is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with eCos; if not, write to the Free Software Foundation, Inc.,

 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 *

 * As a special exception, if other files instantiate templates or use

 * macros or inline functions from this file, or you compile this file

 * and link it with other works to produce a work based on this file,

 * this file does not by itself cause the resulting work to be covered by

 * the GNU General Public License. However the source code for this file

 * must still be made available in accordance with section (3) of the GNU

 * General Public License v2.

 *

 * This exception does not invalidate any other reasons why a work based

 * on this file might be covered by the GNU General Public License.

 * -------------------------------------------

 * ####ECOSGPLCOPYRIGHTEND####

 * =================================================================

 * #####DESCRIPTIONBEGIN####

 *

 *  Author(s):    nickg@calivar.com

 *  Contributors: nickg@calivar.com, andrew.lunn@ascom.ch

 *  Date:         2002-10-14

 *  Purpose:

 *  Description:

 *

 * ####DESCRIPTIONEND####

 *

 * =================================================================

 */

#include <pkgconf/system.h>

#include <pkgconf/isoinfra.h>

#include <pkgconf/net.h>

#include <pkgconf/httpd.h>

#include <pkgconf/kernel.h>

#include <cyg/infra/cyg_trac.h>        /* tracing macros */

#include <cyg/infra/cyg_ass.h>         /* assertion macros */

#include <cyg/httpd/httpd.h>

#include <cyg/kernel/kapi.h>

#ifdef CYGPKG_KERNEL_INSTRUMENT

#include <cyg/kernel/instrmnt.h>

#include <cyg/kernel/instrument_desc.h>

#endif

#include <unistd.h>

#include <ctype.h>

/* ================================================================= */

/* Include all the necessary network headers by hand. We need to do

 * this so that _KERNEL is correctly defined, or not, for specific

 * headers so we can use both the external API and get at internal

 * kernel structures.

 */

#define _KERNEL

#include <sys/param.h>

#undef _KERNEL

#include <sys/socket.h>

#include <sys/ioctl.h>

#include <sys/errno.h>

#include <sys/time.h>

#include <netdb.h>

#define _KERNEL

#include <sys/sysctl.h>

#include <net/if.h>

#include <ifaddrs.h>

#include <netinet/in.h>

#include <netinet/ip.h>

#include <netinet/ip_icmp.h>

#include <net/route.h>

#include <net/if_dl.h>

#include <sys/protosw.h>

#include <netinet/in_pcb.h>

#include <netinet/udp.h>

#include <netinet/tcp.h>

#include <netinet/tcp_timer.h>

#include <netinet/ip_var.h>

#include <netinet/icmp_var.h>

#include <netinet/udp_var.h>

#include <netinet/tcp_var.h>

#ifdef CYGPKG_NET_INET6

#include <netinet/ip6.h>

#include <net/if_var.h>

#include <netinet6/ip6_var.h>

#include <netinet6/in6_var.h>

#include <netinet/icmp6.h>

#endif

#include <sys/mbuf.h>

#include <cyg/io/eth/eth_drv_stats.h>

/* ================================================================= */

/* Use this when a thread appears to have no name.

 */

#define NULL_THREAD_NAME "----------"

/* ================================================================= */

/* Draw navigation bar

 *

 * This draws a simple table containing links to the various monitor

 * pages at the current position in the HTML stream.

 */

static void draw_navbar( FILE *client )

{

    html_para_begin( client, "" );

    html_table_begin( client, "border cellpadding=\"4\"" );

    {

        html_table_row_begin(client, "" );

        {

            html_table_data_begin( client, "" );

            html_image( client, "/monitor/ecos.gif", "eCos logo", "" );

            html_table_data_begin( client, "" );

            html_url( client, "Threads", "/monitor/threads.html");

            html_table_data_begin( client, "" );

            html_url( client, "Interrupts", "/monitor/interrupts.html");

            html_table_data_begin( client, "" );

            html_url( client, "Memory", "/monitor/memory.html");

            html_table_data_begin( client, "" );

            html_url( client, "Network", "/monitor/network.html");

#ifdef CYGPKG_KERNEL_INSTRUMENT

            html_table_data_begin( client, "" );

            html_url( client, "Instrumentation", "/monitor/instrument.html");

#endif

        }

        html_table_row_end( client );

    }

    html_table_end( client );

}

/* ================================================================= */

/* Index page

 *

 * A simple introductory page matching "/monitor" and

 * "/monitor/index.html".

 */

static char monitor_index_blurb[] =

"<p>This is the eCos System Monitor. It presents a simple web monitor "

"and control interface for eCos systems.\n"

"<p>Use the navigation bar at the bottom of each page to explore."

;

static cyg_bool cyg_monitor_index( FILE * client, char *filename,

                                   char *formdata, void *arg )

{

    html_begin(client);

    html_head(client,"eCos System Monitor", "");

    html_body_begin(client,"");

    {

        html_heading(client, 2, "eCos System Monitor" );

        fputs( monitor_index_blurb, client );

        draw_navbar(client);

    }

    html_body_end(client);

    html_end(client);

    return 1;

}

CYG_HTTPD_TABLE_ENTRY( cyg_monitor_entry,

                       "/monitor",

                       cyg_monitor_index,

                       NULL );

CYG_HTTPD_TABLE_ENTRY( cyg_monitor_index_entry,

                       "/monitor/index.html",

                       cyg_monitor_index,

                       NULL );

/* ================================================================= */

/* Thread Monitor

 *

 * Uses the kapi thread info API to enumerate all the current threads

 * and generate a table showing their state.

 */

static cyg_bool cyg_monitor_threads( FILE * client, char *filename,

                                     char *formdata, void *arg )

{

    html_begin(client);

/*    html_head(client,"Thread Monitor", "<meta http-equiv=\"refresh\" content=\"10\">"); */

    html_head(client,"eCos Thread Monitor", "");

    html_body_begin(client,"");

    {

        html_heading(client, 2, "Thread Monitor" );

        html_table_begin( client, "border" );

        {

            cyg_handle_t thread = 0;

            cyg_uint16 id = 0;

            html_table_header( client, "Id", "" );

            html_table_header( client, "State", "" );

            html_table_header( client, "Set<br>Priority", "" );

            html_table_header( client, "Current<br>Priority", "" );

            html_table_header( client, "Name", "" );

            html_table_header( client, "Stack Base", "" );

            html_table_header( client, "Stack Size", "" );

#ifdef CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT

            html_table_header( client, "Stack Used", "" );

#endif

            /* Loop over the threads, and generate a table row for

             * each.

             */

            while( cyg_thread_get_next( &thread, &id ) )

            {

                cyg_thread_info info;

                char *state_string;

                cyg_thread_get_info( thread, id, &info );

                if( info.name == NULL )

                    info.name = NULL_THREAD_NAME;

                /* Translate the state into a string.

                 */

                if( info.state == 0 )

                    state_string = "RUN";

                else if( info.state & 0x04 )

                    state_string = "SUSP";

                else switch( info.state & 0x1b )

                {

                case 0x01: state_string = "SLEEP"; break;

                case 0x02: state_string = "CNTSLEEP"; break;

                case 0x08: state_string = "CREATE"; break;

                case 0x10: state_string = "EXIT"; break;

                default: state_string = "????"; break;

                }

                /* Now generate the row.

                 */

                html_table_row_begin(client, "" );

                {

                    html_table_data_begin( client, "" );

                    fprintf( client, "<a href=\"/monitor/thread-%04x.html\">%04x</a>\n", id,id);

                    html_table_data_begin( client, "" );

                    fprintf( client, "%s", state_string);

                    html_table_data_begin( client, "" );

                    fprintf( client, "%d", info.set_pri);

                    html_table_data_begin( client, "" );

                    fprintf( client, "%d", info.cur_pri);

                    html_table_data_begin( client, "" );

                    fputs( info.name, client );

                    html_table_data_begin( client, "" );

                    fprintf( client, "%08x", info.stack_base );

                    html_table_data_begin( client, "" );

                    fprintf( client, "%d", info.stack_size );

#ifdef CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT

                    html_table_data_begin( client, "" );

                    fprintf( client, "%d", info.stack_used );

#endif

                }

                html_table_row_end(client);

            }

        }

        html_table_end( client );

        draw_navbar(client);

    }

    html_body_end(client);

    html_end(client);

    return 1;

}

CYG_HTTPD_TABLE_ENTRY( cyg_monitor_show_threads,

                       "/monitor/threads.htm*",

                       cyg_monitor_threads,

                       NULL );

/* ================================================================= */

/* Thread edit page

 *

 * A page on which the thread's state may be edited. This tests forms

 * handling.

 */

static char thread_edit_blurb[] =

"<p>This table contains an entry for each property of the thread "

"that you can edit. The properties are:\n"

"<p><b>State:</b> Change thread's state. The <em>Suspend</em> button "

"will suspend the thread. The <em>Run</em> button will undo any previous "

"suspends. The <em>Release</em> button will release the thread out of "

"any sleep it is currently in.\n"

"<p><b>Priority:</b> Change the thread's priority.\n"

"<p>Once the new state has been selected, press the <em>Submit</em> "

"button to make the change, or <em>Reset</em> to clear it."

;

static cyg_bool cyg_monitor_thread_edit( FILE * client, char *filename,

                                         char *formdata, void *arg )

{

    /* If any form data has been supplied, then change the thread's

     * state accordingly.

     */

    if( formdata != NULL )

    {

        char *formlist[6];

        char *state;

        char *pri_string;

        char *id_string;

        cyg_handle_t thread = 0;

        cyg_uint16 id;

        /* Parse the data */

        cyg_formdata_parse( formdata, formlist, 6 );

        /* Get the thread id from the hidden control */

        id_string = cyg_formlist_find( formlist, "thread");

        sscanf( id_string, "%04hx", &id );

        thread = cyg_thread_find( id );

        /* If there is a pri field, change the priority */

        pri_string = cyg_formlist_find( formlist, "pri");

        if( pri_string != NULL )

        {

            cyg_priority_t pri;

            sscanf( pri_string, "%d", &pri );

            cyg_thread_set_priority( thread, pri );

        }

        /* If there is a state field, change the thread state */

        state = cyg_formlist_find( formlist, "state");

        if( state != NULL )

        {

            if( strcmp( state, "run" ) == 0 )

                cyg_thread_resume( thread );

            if( strcmp( state, "suspend" ) == 0 )

                cyg_thread_suspend( thread );

            if( strcmp( state, "release" ) == 0 )

                cyg_thread_release( thread );

        }

    }

    /* Now generate a page showing the current thread state, and

     * including form controls to change it.

     */

    html_begin(client);

    html_head(client,"eCos Thread Editor", "");

    html_body_begin(client,"");

    {

        cyg_uint16 id;

        cyg_thread_info info;

        cyg_handle_t thread = 0;

        char idbuf[16];

        sscanf( filename, "/monitor/thread-%04hx.html", &id );

        thread = cyg_thread_find( id );

        cyg_thread_get_info(thread, id, &info );

        html_heading(client, 2, "Thread State Editor" );

        html_para_begin( client, "" );

        fprintf( client, "Editing Thread %04x %s\n",id,

                 info.name?info.name:NULL_THREAD_NAME);

        fputs( thread_edit_blurb, client );

        html_form_begin( client, filename, "" );

        {

            html_table_begin( client, "border" );

            {

                html_table_header( client, "Property", "" );

                html_table_header( client, "Value", "" );

                html_table_row_begin(client, "" );

                {

                    html_table_data_begin( client, "" );

                    fputs( "State", client );

                    html_table_data_begin( client, "" );

                    html_form_input_radio( client, "state", "run", (info.state&0x04)==0 );

                    fputs( "Run", client );

                    html_form_input_radio( client, "state", "suspend", (info.state&0x04)!=0 );

                    fputs( "Suspend", client );

                    html_form_input_radio( client, "state", "release", 0 );

                    fputs( "Release", client );

                }

                html_table_row_end( client );

                html_table_row_begin(client, "" );

                {

                    html_table_data_begin( client, "" );

                    fputs( "Priority", client );

                    html_table_data_begin( client, "" );

                    fprintf(client,"<input type=\"text\" name=\"pri\" size=\"10\" value=\"%d\">\n",

                            info.set_pri);

                }

                html_table_row_end( client );

            }

            html_table_end( client );

            /* Add submit and reset buttons */

            html_form_input(client, "submit", "submit", "Submit", "");

            html_form_input(client, "reset", "reset", "Reset", "");

            /* Pass the thread ID through to our next incarnation */

            sprintf( idbuf, "%04x", id );

            html_form_input_hidden(client, "thread", idbuf );

        }

        html_form_end( client );

        draw_navbar(client);

    }

    html_body_end(client);

    html_end(client);

    return 1;

}

CYG_HTTPD_TABLE_ENTRY( cyg_monitor_thread_edit_entry,

                       "/monitor/thread-*",

                       cyg_monitor_thread_edit,

                       NULL );

/* ================================================================= */

/* Interrupt monitor

 *

 * At present this just generates a table showing which interrupts

 * have an ISR attached.

 */

static cyg_bool cyg_monitor_interrupts( FILE * client, char *filename,

                                        char *formdata, void *arg )

{

    html_begin(client);

    html_head(client,"eCos Interrupt Monitor", "");

    html_body_begin(client,"");

    {

        html_heading(client, 2, "Interrupt Monitor" );

        html_table_begin( client, "border" );

        {

            int i;

            int maxint = CYGNUM_HAL_ISR_MAX;

#ifdef CYGPKG_HAL_I386

            maxint = CYGNUM_HAL_ISR_MIN+16;

#endif

            html_table_header( client, "ISR", "" );

            html_table_header( client, "State", "" );

            for( i = CYGNUM_HAL_ISR_MIN; i <= maxint ; i++ )

            {

                cyg_bool_t inuse;

                HAL_INTERRUPT_IN_USE( i, inuse );

                html_table_row_begin(client, "" );

                {

                    html_table_data_begin( client, "" );

                    fprintf( client, "%d", i);

                    html_table_data_begin( client, "" );

                    fprintf( client, "%s", inuse?"In Use":"Free");

                }

                html_table_row_end( client );

            }

        }

        html_table_end( client );

        draw_navbar(client);

    }

    html_body_end(client);

    html_end(client);

    return 1;

}

CYG_HTTPD_TABLE_ENTRY( cyg_monitor_interrupts_entry,

                       "/monitor/interrupts.htm*",

                       cyg_monitor_interrupts,

                       NULL );

/* ================================================================= */

/* Memory monitor

 *

 * Generates a table showing a 256 byte page of memory. Form controls

 * allow changes to the base address and display element size.

 */

static cyg_bool cyg_monitor_memory( FILE * client, char *filename,

                                    char *formdata, void *arg )

{

    char *formlist[10];

    cyg_uint32 base = 0;

    unsigned int datasize = 1;

    int size = 256;

    char *p;

    bool valid_base = true;

    cyg_formdata_parse( formdata, formlist, 10 );

    p = cyg_formlist_find( formlist, "base" );

    /* If the page is requested without a 'base' parameter, do not attempt

     * to access any memory locations to prevent illegal memory accesses

     * on targets where '0' is not a valid address.

     */

    if( p != NULL )

        sscanf( p, "%x", &base );

    else

        valid_base = false;

    p = cyg_formlist_find( formlist, "datasize" );

    if( p != NULL )

        sscanf( p, "%x", &datasize );

    if( cyg_formlist_find( formlist, "next" ) != NULL )

        base += size;

    if( cyg_formlist_find( formlist, "prev" ) != NULL )

        base -= size;

    html_begin(client);

    html_head(client,"eCos Memory Monitor", "");

    html_body_begin(client,"");

    {

        html_heading(client, 2, "Memory Monitor" );

        html_form_begin( client, "/monitor/memory.html", "" );

        {

            /* Text input control for base address

             */

            html_para_begin( client, "" );

            fprintf(client,

                    "Base Address: 0x<input type=\"text\" name=\"base\" size=\"10\" value=\"%x\">\n",

                    base);

            fprintf(client,

                    "WARNING: entering an illegal base address can crash the system.\n");

            /* A little menu for the element size

             */

            html_para_begin( client, "" );

            fputs( "Element Size: ", client );

            html_form_select_begin( client, "datasize", "" );

            html_form_option( client, "1", "bytes", datasize==1 );

            html_form_option( client, "2", "words", datasize==2 );

            html_form_option( client, "4", "dwords", datasize==4 );

            html_form_select_end( client );

            html_para_begin( client, "" );

            /* Submit and reset buttons

             */

            html_form_input(client, "submit", "submit", "Submit", "");

            html_form_input(client, "reset", "reset", "Reset", "");

            html_para_begin( client, "" );

            /* Previous page button */

            html_form_input(client, "submit", "prev", "Prev Page", "");

            /* Switch to monospaced font */

            cyg_html_tag_begin( client, "font", "face=\"monospace\"" );

            html_table_begin( client, "" );

            if (valid_base == true) {

                cyg_addrword_t loc;

                cyg_addrword_t oloc;

                for( oloc = loc = base; loc <= (base+size) ; loc++ )

                {

                    if( ( loc % 16 ) == 0 )

                    {

                        if( loc != base )

                        {

                            html_table_data_begin( client, "" );

                            for( ; oloc < loc; oloc++ )

                            {

                                char c = *(char *)oloc;

                                if( !isprint(c) )

                                    c = '.';

                                putc( c, client );

                            }

                            html_table_row_end( client );

                        }

                        if( loc == (base+size) )

                            break;

                        html_table_row_begin(client, "" );

                        html_table_data_begin( client, "" );

                        fprintf( client, "%08x:",loc);

                    }

                    html_table_data_begin( client, "" );

                    if( (loc % datasize) == 0 )

                    {

                        switch( datasize )

                        {

                        case 1: fprintf( client, "%02x", *(cyg_uint8  *)loc ); break;

                        case 2: fprintf( client, "%04x", *(cyg_uint16 *)loc ); break;

                        case 4: fprintf( client, "%08x", *(cyg_uint32 *)loc ); break;

                        }

                    }

                }

            }

            html_table_end( client );

            cyg_html_tag_end( client, "font" );

            html_form_input(client, "submit", "next", "Next Page", "");

        }

        html_form_end( client );

        draw_navbar(client);

    }

    html_body_end(client);

    html_end(client);

    return 1;

}

CYG_HTTPD_TABLE_ENTRY( cyg_monitor_memory_entry,

                       "/monitor/memory.htm*",

                       cyg_monitor_memory,

                       NULL );

/* ================================================================= */

/* Network Monitor

 *

 * This function generates a page containing information about the

 * network interfaces and the protocols.

 */

static cyg_bool cyg_monitor_network( FILE * client, char *filename,

                                     char *formdata, void *arg )