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

//

//      tests/dhcp_test.c

//

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

//

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

// ####BSDALTCOPYRIGHTBEGIN####                                             

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

// Portions of this software may have been derived from FreeBSD, OpenBSD,   

// or other sources, and if so are covered by the appropriate copyright     

// and license included herein.                                             

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

// ####BSDALTCOPYRIGHTEND####                                               

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

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

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2000-01-10

// Purpose:      

// Description:  

//              

//

//####DESCRIPTIONEND####

//

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

// DHCP test code

#include <network.h>

#include <pkgconf/system.h>

#include <pkgconf/net.h>

#include <dhcp.h>

#include <cyg/infra/testcase.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

#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

#define MIN_PACKET   64

#define MAX_SEND   4000

#define PACKET_ADD  ((MAX_SEND - MIN_PACKET)/NUM_PINGS)

#define nPACKET_ADD  1 

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 = MIN_PACKET;

    int seq, ok_recv, bogus_recv;

    cyg_tick_count_t *tp;

    long *dp;

    struct sockaddr_in from;

    int i, len;

    socklen_t 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++, icmp_len += PACKET_ADD ) {

        TNR_ON();

        // 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) {

            TNR_OFF();

            perror("sendto");

            continue;

        }

        // Wait for a response

        fromlen = sizeof(from);

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

        TNR_OFF();

        if (len < 0) {

            perror("recvfrom");

            icmp_len = MIN_PACKET - PACKET_ADD; // go back to small packet size

            seq+=4;

        } else {

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

                ok_recv++;

            } else {

                bogus_recv++;

            }

        }

    }

    TNR_OFF();

}

static void

ping_test(struct bootp *bp)

{

    struct protoent *p;

    struct timeval tv;

    struct sockaddr_in host;

    int s;

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

        pexit("getprotobyname");

        return;

    }

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

    if (s < 0) {

        pexit("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 = bp->bp_siaddr;

    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);

    close(s);

}

void

net_test(cyg_addrword_t p)

{

#ifndef CYGPKG_NET_DHCP

    CYG_TEST_NA( "DHCP is not enabled" );

    CYG_TEST_EXIT( "DHCP is not enabled" );

#else

    int i;

    diag_printf("Start DHCP test\n");

    TNR_INIT();

    init_all_network_interfaces();

    for ( i = 10; i > 0; i-- ) {

#ifdef CYGHWR_NET_DRIVER_ETH0

        if (eth0_up) {

            ping_test(&eth0_bootp_data);

        }

#endif

        // Now do the DHCP renewal ritual...

        if ( cyg_semaphore_trywait( &dhcp_needs_attention )) {

            if ( ! dhcp_bind() ) {

                // All done

                dhcp_halt();

                CYG_TEST_FAIL_FINISH( "Rebind after lease failed");

                break;

            }

        }

#ifdef CYGHWR_NET_DRIVER_ETH1

        if (eth1_up) {

            ping_test(&eth1_bootp_data);

        }

#endif

#ifndef CYGOPT_NET_DHCP_DHCP_THREAD

        // Now do the DHCP renewal ritual...

        if ( cyg_semaphore_trywait( &dhcp_needs_attention )) {

            if ( ! dhcp_bind() ) {

                // All done

                dhcp_halt();

                CYG_TEST_FAIL_FINISH( "Rebind after lease failed");

                break;

            }

        }

#endif // not CYGOPT_NET_DHCP_DHCP_THREAD 

        if ( 1 == (i & 3) ) {

            dhcp_release();             // relinquish leases

            dhcp_halt();

            init_all_network_interfaces();

        }

    }

    dhcp_release();

    TNR_PRINT_ACTIVITY();

    CYG_TEST_PASS_FINISH("Dhcp test OK");

#endif

}

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

                      &stack[0],         // Stack

                      STACK_SIZE,        // Size

                      &thread_handle,    // Handle

                      &thread_data       // Thread data structure

            );

    cyg_thread_resume(thread_handle);  // Start it

    cyg_scheduler_start();

}