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

//

//      tests/isp.c

//

//      Test of PPP and CHAT connection to an ISP

//

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

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// ####BSDALTCOPYRIGHTBEGIN####                                             

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

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

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

//

// Author(s):    nickg

// Contributors: gthomas (ping code), nickg

// Date:         2003-06-01

// Purpose:      

// Description:  This test uses CHAT to set up a modem, dial, talk to an ISP

//               and then ping some well known addresses. It then brings the

//               link down.

//              

//

//####DESCRIPTIONEND####

//

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

// PPP test code

#include <network.h>

#include <pkgconf/system.h>

#include <pkgconf/net.h>

#include <pkgconf/ppp.h>

#include <cyg/ppp/ppp.h>

#include <cyg/io/io.h>

#include <cyg/io/serialio.h>

#include <cyg/infra/testcase.h>

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

#include <arpa/inet.h>

// 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 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, 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; // just in case - long routes

        } else {

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

                ok_recv++;

            } else {

                bogus_recv++;

            }

        }

    }

    TNR_OFF();

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

}

static void do_ping(char *addr)

{

    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);

    inet_aton(addr, &host.sin_addr);

    host.sin_port = 0;

    ping_host(s, &host);

}

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

#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;

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

/*

Captured session:

AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0

OK

ATD08440416662

CONNECT 42666/ARQ/V90/LAPM/V42BIS

anchor-du-10.access.demon.net

login: xxxxxx

Password: yyyyyy

Protocol: ppp

xxxxxx: IP Address: XXX.XXX.XXX.XXX  Running PPP on 1223

No operational problems reported.

Finger status@gate.demon.co.uk for more info - Last change 16:30 Jun 08

HELLO

OK

ATH

OK

*/

static char *script[] =

{

    "ABORT"             ,       "BUSY"                                  ,

    "ABORT"             ,       "NO CARRIER"                            ,

    "ABORT"             ,       "ERROR"                                 ,

    ""                  ,       "ATZ"                                   ,

    "OK"                ,       "AT S7=45 S0=0 L1 V1 X4 &C1 E1 Q0"      ,

    "OK"                ,       "ATD" CYGPKG_PPP_DEFAULT_DIALUP_NUMBER  ,

    "ogin:--ogin:"      ,       CYGPKG_PPP_AUTH_DEFAULT_USER            ,

    "assword:"          ,       CYGPKG_PPP_AUTH_DEFAULT_PASSWD          ,

    "otocol:"           ,       "ppp"                                   ,

    "HELLO"             ,       "\\c"                                   ,

};

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

void

isp_test(cyg_addrword_t p)

{

    CYG_TEST_INIT();

    diag_printf("Start ISP test\n");

    init_all_network_interfaces();

    {

        cyg_ppp_options_t options;

        cyg_ppp_handle_t ppp_handle;

        cyg_ppp_options_init( &options );

//        options.debug = 1;

//        options.kdebugflag = 1;

        options.modem = 1;

        options.script = &script[0];

        ppp_handle = cyg_ppp_up( CYGPKG_PPP_TEST_DEVICE, &options );

        CYG_TEST_INFO( "Waiting for PPP to come up");

        cyg_ppp_wait_up( ppp_handle );

        CYG_TEST_INFO( "Delaying for a while...");

        cyg_thread_delay(10*100);

        CYG_TEST_INFO( "Pinging");

        do_ping("195.173.57.10");       // anchor-du-10.access.demon.net

        do_ping("194.154.160.254");     // fluffy.ecoscentric.com

        do_ping("66.187.233.205");      // sources.redhat.com

        CYG_TEST_INFO( "Bringing PPP down");

        cyg_ppp_down( ppp_handle );

        CYG_TEST_INFO( "Waiting for PPP to go down");

        cyg_ppp_wait_down( ppp_handle );

    }

    CYG_TEST_PASS_FINISH("ISP test OK");

}

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

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

                      isp_test,          // entry

                      0,                 // entry parameter

                      "ISP 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();

}

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