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//==========================================================================

//

//      tests/flood.c

//

//      Flood PING test

//

//==========================================================================

//####BSDCOPYRIGHTBEGIN####

//

// -------------------------------------------

//

// Portions of this software may have been derived from OpenBSD or other sources,

// and are covered by the appropriate copyright disclaimers included herein.

//

// -------------------------------------------

//

//####BSDCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas, hmt

// Contributors: gthomas

// Date:         2000-05-03

// Purpose:      

// Description:  

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <pkgconf/system.h>

#include <pkgconf/net.h>

#ifdef CYGBLD_DEVS_ETH_DEVICE_H    // Get the device config if it exists

#include CYGBLD_DEVS_ETH_DEVICE_H  // May provide CYGTST_DEVS_ETH_TEST_NET_REALTIME

#endif

#ifdef CYGPKG_NET_TESTS_USE_RT_TEST_HARNESS // do we use the rt test?

# ifdef CYGTST_DEVS_ETH_TEST_NET_REALTIME // Get the test ancilla if it exists

#  include CYGTST_DEVS_ETH_TEST_NET_REALTIME

# endif

#endif

// Fill in the blanks if necessary

#ifndef TNR_OFF

# define TNR_OFF()

#endif

#ifndef TNR_ON

# define TNR_ON()

#endif

#ifndef TNR_INIT

# define TNR_INIT()

#endif

#ifndef TNR_PRINT_ACTIVITY

# define TNR_PRINT_ACTIVITY()

#endif

// FLOOD PING test code

#include <network.h>

#define MAX_PACKET 4096

#define NUMTHREADS 3

#define STACK_SIZE (CYGNUM_HAL_STACK_SIZE_TYPICAL + MAX_PACKET + MAX_PACKET + 0x1000)

static char thread_stack[NUMTHREADS][STACK_SIZE];

static cyg_thread thread_data[NUMTHREADS];

static cyg_handle_t thread_handle[NUMTHREADS];

#define DO_DUMPSTATS( seq ) (0 == (0xffff & seq))

#ifdef CYGHWR_NET_DRIVER_ETH0

struct sockaddr_in host0;

#endif

#ifdef CYGHWR_NET_DRIVER_ETH1

struct sockaddr_in host1;

#endif

static int sock;

static int uniqueid[3] = { 0x1234, 0x4321, 0xdead };

static int ok_recv[3] = { 0,0,0 };

static int bogus_recv[3] = { 0,0,0 };

static int pings_sent[3] = { 0,0,0 };

extern void cyg_kmem_print_stats( void );

extern void

cyg_test_exit(void);

void

pexit(char *s)

{

    perror(s);

    cyg_test_exit();

}

// ------------------------------------------------------------------------

static void dumpstats(void)

{

    TNR_OFF();

    diag_printf( "------------------------\n" );

#ifdef CYGHWR_NET_DRIVER_ETH0

    if (eth0_up) {

        diag_printf("%16s: Sent %d packets, received %d OK, %d bad\n",

                    inet_ntoa(host0.sin_addr), pings_sent[0],

                    ok_recv[0], bogus_recv[0]);

    }

#endif

#ifdef CYGHWR_NET_DRIVER_ETH1

    if (eth1_up) {

        diag_printf("%16s: Sent %d packets, received %d OK, %d bad\n",

                    inet_ntoa(host1.sin_addr), pings_sent[1],

                    ok_recv[1], bogus_recv[1]);

    }

#endif

    if ( pings_sent[2] )

        diag_printf("Wierd!  %d unknown sends!\n", pings_sent[2] );

    if ( ok_recv[2] )

        diag_printf("Wierd!  %d unknown good recvs!\n", ok_recv[2] );

    if ( bogus_recv[2] )

        diag_printf("Wierd!  %d unknown bogus recvs!\n", bogus_recv[2] );

    cyg_kmem_print_stats();

    diag_printf( "------------------------\n" );

    TNR_ON();

}

// ------------------------------------------------------------------------

// Compute INET checksum

int

inet_cksum(u_short *addr, int len)

{

    register int nleft = len;

    register u_short *w = addr;

    register u_short answer;

    register u_int sum = 0;

    u_short odd_byte = 0;

    /*

     *  Our algorithm is simple, using a 32 bit accumulator (sum),

     *  we add sequential 16 bit words to it, and at the end, fold

     *  back all the carry bits from the top 16 bits into the lower

     *  16 bits.

     */

    while( nleft > 1 )  {

        sum += *w++;

        nleft -= 2;

    }

    /* mop up an odd byte, if necessary */

    if( nleft == 1 ) {

        *(u_char *)(&odd_byte) = *(u_char *)w;

        sum += odd_byte;

    }

    /*

     * add back carry outs from top 16 bits to low 16 bits

     */

    sum = (sum >> 16) + (sum & 0x0000ffff); /* add hi 16 to low 16 */

    sum += (sum >> 16);                     /* add carry */

    answer = ~sum;                          /* truncate to 16 bits */

    return (answer);

}

// ------------------------------------------------------------------------

static void

show_icmp(unsigned char *pkt, int len, struct sockaddr_in *from)

{

    cyg_tick_count_t *tp, tv;

    struct ip *ip;

    struct icmp *icmp;

    int which = 2;

    tv = cyg_current_time();

#ifdef CYGHWR_NET_DRIVER_ETH0

    if (eth0_up && (from->sin_addr.s_addr == host0.sin_addr.s_addr) )

        which = 0;

#endif

#ifdef CYGHWR_NET_DRIVER_ETH1

    if (eth1_up && (from->sin_addr.s_addr == host1.sin_addr.s_addr) )

        which = 1;

#endif

    ip = (struct ip *)pkt;

    if ((len < sizeof(*ip)) || ip->ip_v != IPVERSION) {

        diag_printf("%s: Short packet or not IP! - Len: %d, Version: %d\n",

                    inet_ntoa(from->sin_addr), len, ip->ip_v);

        bogus_recv[which]++;

        return;

    }

    icmp = (struct icmp *)(pkt + sizeof(*ip));

    len -= (sizeof(*ip) + 8);

    tp = (cyg_tick_count_t *)&icmp->icmp_data;

    if (icmp->icmp_type != ICMP_ECHOREPLY) {

        diag_printf("%s: Invalid ICMP - type: %d\n",

                    inet_ntoa(from->sin_addr), icmp->icmp_type);

        bogus_recv[which]++;

        return;

    }

    ok_recv[which]++;

    if (icmp->icmp_id != uniqueid[which]) {

        diag_printf("%s: ICMP received for wrong id - sent: %x, recvd: %x\n",

                    inet_ntoa(from->sin_addr), uniqueid[which], icmp->icmp_id);

    }

//    diag_printf("%d bytes from %s: ", len, inet_ntoa(from->sin_addr));

//    diag_printf("icmp_seq=%d", icmp->icmp_seq);

//    diag_printf(", time=%dms\n", (int)(tv - *tp)*10);

}

// ------------------------------------------------------------------------

static void

floodrecv(cyg_addrword_t p)

{

    unsigned char pkt[MAX_PACKET];

    struct sockaddr_in from;

    int len, fromlen;

    diag_printf("PING listener...\n" );

    for (;;) {

        // Wait for a response

        fromlen = sizeof(from);

        len = recvfrom(sock, pkt, sizeof(pkt), 0,

                       (struct sockaddr *)&from, &fromlen);

        if (len < 0)

            perror("recvfrom");

        else

            show_icmp(pkt, len, &from);

    }

}

// ------------------------------------------------------------------------

static void

pingsend( int seq, struct sockaddr_in *host,

          struct icmp *icmp, int icmp_len, int which )

{

    cyg_tick_count_t *tp;

    long *dp;

    int i;

    // Build ICMP packet for interface

    icmp->icmp_type = ICMP_ECHO;

    icmp->icmp_code = 0;

    icmp->icmp_cksum = 0;

    icmp->icmp_seq = seq;

    icmp->icmp_id = uniqueid[which];

    // Set up ping data

    tp = (cyg_tick_count_t *)&icmp->icmp_data;

    *tp++ = cyg_current_time();

    dp = (long *)tp;

    for (i = sizeof(*tp);  i < icmp_len;  i += sizeof(*dp))

        *dp++ = i;

    // Add checksum

    icmp->icmp_cksum = inet_cksum( (u_short *)icmp, icmp_len+8);

    // Send it off

    if (sendto(sock, icmp, icmp_len+8, MSG_DONTWAIT,

              (struct sockaddr *)host, sizeof(*host)) < 0) {

        perror("sendto");

    }

    pings_sent[which]++;

}

// ------------------------------------------------------------------------

static void

floodsend(cyg_addrword_t param)

{

#ifdef CYGHWR_NET_DRIVER_ETH0

    unsigned char pkt0[MAX_PACKET];

    struct icmp *icmp0 = (struct icmp *)pkt0;

#endif

#ifdef CYGHWR_NET_DRIVER_ETH1

    unsigned char pkt1[MAX_PACKET];

    struct icmp *icmp1 = (struct icmp *)pkt1;

#endif

    int icmp_len = 64;

    int seq;

    for (seq = 0; 1 ; seq++) {

        if ( DO_DUMPSTATS( seq ) )

            dumpstats();

#ifdef CYGHWR_NET_DRIVER_ETH0

        if (eth0_up)

            pingsend( seq, &host0, icmp0, icmp_len, 0 );

#endif

#ifdef CYGHWR_NET_DRIVER_ETH1

        if (eth1_up)

            pingsend( seq, &host1, icmp1, icmp_len, 1 );

#endif

    }

}

// ------------------------------------------------------------------------

void

net_test(cyg_addrword_t param)

{

    struct protoent *p;

    diag_printf("Start Flood PING test\n");

    init_all_network_interfaces();

    diag_printf("Interfaces up:\n");

    cyg_kmem_print_stats();

    TNR_INIT();

    if ((p = getprotobyname("icmp")) == (struct protoent *)0) {

        perror("getprotobyname");

        return;

    }

    sock = socket(AF_INET, SOCK_RAW, p->p_proto);

    if (sock < 0) {

        perror("tx socket");

        return;

    }

#ifdef CYGHWR_NET_DRIVER_ETH0

    if (eth0_up) {

        host0.sin_family = AF_INET;

        host0.sin_len = sizeof(host0);

        host0.sin_addr = eth0_bootp_data.bp_siaddr;

        host0.sin_port = 0;

        diag_printf("PING server %16s\n", inet_ntoa(host0.sin_addr));

    }

#endif

#ifdef CYGHWR_NET_DRIVER_ETH1

    if (eth1_up) {

        host1.sin_family = AF_INET;

        host1.sin_len = sizeof(host1);

        host1.sin_addr = eth1_bootp_data.bp_siaddr;

        host1.sin_port = 0;

        diag_printf("PING server %16s\n", inet_ntoa(host1.sin_addr));

    }

#endif

    cyg_thread_resume(thread_handle[1]);

    cyg_thread_resume(thread_handle[2]);

    cyg_thread_delay( 100 ); // let the other threads start and print

    TNR_ON();                // then enable the test

    cyg_thread_delay( 12000 ); // run for a couple of minutes

    TNR_OFF();

    diag_printf("After running:\n");

    dumpstats();

    TNR_PRINT_ACTIVITY();

    cyg_test_exit();

}

// ------------------------------------------------------------------------

void

cyg_start(void)

{

    // Create a main thread, so we can run the scheduler and have time 'pass'

    cyg_thread_create(10,                // Priority - just a number

                      net_test,          // entry

                      0,                 // entry parameter

                      "Network test",    // Name

                     &thread_stack[0][0], // Stack

                      STACK_SIZE,        // Size

                      &thread_handle[0], // Handle

                      &thread_data[0]    // Thread data structure

            );

    cyg_thread_resume(thread_handle[0]);  // Start it

    // Create the secondary threads

    cyg_thread_create(11,                // Priority - just a number

                      floodrecv,         // entry

                      0,                 // entry parameter

                      "Flood Ping Recv", // Name

                     &thread_stack[1][0], // Stack

                      STACK_SIZE,        // Size

                      &thread_handle[1], // Handle

                      &thread_data[1]    // Thread data structure

            );

    cyg_thread_create(12,                // Priority - just a number

                      floodsend,         // entry

                      0,                 // entry parameter

                      "Flood Ping Send", // Name

                     &thread_stack[2][0], // Stack

                      STACK_SIZE,        // Size

                      &thread_handle[2], // Handle

                      &thread_data[2]    // Thread data structure

            );

    cyg_scheduler_start();

}

// EOF flood.c