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

//

//      tests/ping_lo_test.c

//

//      Simple test of PING (ICMP) and networking support

//

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

//####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, sorin@netappi.com

// Contributors: gthomas, sorin@netappi.com

// Date:         2000-01-10

// Purpose:      

// Description:  

//              

//

//####DESCRIPTIONEND####

//

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

// PING test code

#include <network.h>

#include <cyg/infra/testcase.h>

#ifndef CYGPKG_LIBC_STDIO

#define perror(s) diag_printf(#s ": %s\n", strerror(errno))

#endif

#define STACK_SIZE (CYGNUM_HAL_STACK_SIZE_TYPICAL + 0x1000)

static char stack[STACK_SIZE];

static cyg_thread thread_data;

static cyg_handle_t thread_handle;

#define NUM_PINGS 16

#define MAX_PACKET 4096

static unsigned char pkt1[MAX_PACKET], pkt2[MAX_PACKET];

#define UNIQUEID 0x1234

void

pexit(char *s)

{

    CYG_TEST_FAIL_FINISH( s );

}

// 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 int

show_icmp(unsigned char *pkt, int len,

          struct sockaddr_in *from, struct sockaddr_in *to)

{

    cyg_tick_count_t *tp, tv;

    struct ip *ip;

    struct icmp *icmp;

    tv = cyg_current_time();

    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);

        return 0;

    }

    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);

        return 0;

    }

    if (icmp->icmp_id != UNIQUEID) {

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

                    inet_ntoa(from->sin_addr), UNIQUEID, 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);

    return (from->sin_addr.s_addr == to->sin_addr.s_addr);

}

static void

ping_host(int s, struct sockaddr_in *host)

{

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

    int icmp_len = 64;

    int seq, ok_recv, bogus_recv;

    cyg_tick_count_t *tp;

    long *dp;

    struct sockaddr_in from;

    int i, len, fromlen;

    ok_recv = 0;

    bogus_recv = 0;

    diag_printf("PING server %s\n", inet_ntoa(host->sin_addr));

    for (seq = 0;  seq < NUM_PINGS;  seq++) {

        // Build ICMP packet

        icmp->icmp_type = ICMP_ECHO;

        icmp->icmp_code = 0;

        icmp->icmp_cksum = 0;

        icmp->icmp_seq = seq;

        icmp->icmp_id = 0x1234;

        // 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(s, icmp, icmp_len+8, 0, (struct sockaddr *)host, sizeof(*host)) < 0) {

            perror("sendto");

            continue;

        }

        // Wait for a response

        fromlen = sizeof(from);

        len = recvfrom(s, pkt2, sizeof(pkt2), 0, (struct sockaddr *)&from, &fromlen);

        if (len < 0) {

            perror("recvfrom");

        } else {

            if (show_icmp(pkt2, len, &from, host)) {

                ok_recv++;

            } else {

                bogus_recv++;

            }

        }

    }

    diag_printf("Sent %d packets, received %d OK, %d bad\n", NUM_PINGS, ok_recv, bogus_recv);

}

static void

ping_test_loopback( int lo )

{

    struct protoent *p;

    struct timeval tv;

    struct sockaddr_in host;

    int s;

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

        perror("getprotobyname");

        return;

    }

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

    if (s < 0) {

        perror("socket");

        return;

    }

    tv.tv_sec = 1;

    tv.tv_usec = 0;

    setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));

    // Set up host address

    host.sin_family = AF_INET;

    host.sin_len = sizeof(host);

    host.sin_addr.s_addr = htonl(INADDR_LOOPBACK + (0x100 * lo));

    host.sin_port = 0;

    ping_host(s, &host);

    // Now try a bogus host

    host.sin_addr.s_addr = htonl(ntohl(host.sin_addr.s_addr) + 32);

    ping_host(s, &host);

}

void

net_test(cyg_addrword_t p)

{

    int i;

    diag_printf("Start PING test\n");

    init_all_network_interfaces();

#if NLOOP > 0

    for ( i = 0; i < NLOOP; i++ )

        ping_test_loopback( i );

    for ( i = 0; i < NLOOP; i++ )

        ping_test_loopback( i );

    CYG_TEST_PASS_FINISH( "Done pinging loopback" );

#endif

    CYG_TEST_NA( "No loopback devs" );

}

void

cyg_start(void)

{

    CYG_TEST_INIT();

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

    cyg_thread_create(CYGPKG_NET_THREAD_PRIORITY-4,// Priority - just a number

                      net_test,                 // entry

                      0,                        // entry parameter

                      "Loopback ping  test",    // Name

                      &stack[0],                // Stack

                      STACK_SIZE,               // Size

                      &thread_handle,           // Handle

                      &thread_data              // Thread data structure

            );

    cyg_thread_resume(thread_handle);           // Start it

    cyg_scheduler_start();

}