Exemplo n.º 1
0
// Perform all processing to resolve a hostname to IP address.
// Returns 1 for successful Name resolution, 0 otherwise
uint8_t EtherShield::resolveHostname(uint8_t *buf, uint16_t buffer_size, uint8_t *hostname ) {
  uint16_t dat_p;
  int plen = 0;
  long lastDnsRequest = millis();
  uint8_t dns_state = DNS_STATE_INIT;
  boolean gotAddress = false;
  uint8_t dnsTries = 3;	// After 10 attempts fail gracefully so other action can be carried out

  while( !gotAddress ) {
    // handle ping and wait for a tcp packet
    plen = enc28j60PacketReceive(buffer_size, buf);
    dat_p=packetloop_icmp_tcp(buf,plen);

    // We have a packet
    // Check if IP data
    if (dat_p == 0) {
      if (client_waiting_gw() ) {
        // No ARP received for gateway
        continue;
      }
      // It has IP data
      if (dns_state==DNS_STATE_INIT) {
        dns_state=DNS_STATE_REQUESTED;
        lastDnsRequest = millis();
        dnslkup_request(buf,hostname);
        continue;
      }
      if (dns_state!=DNS_STATE_ANSWER){
        // retry every minute if dns-lookup failed:
        if (millis() > (lastDnsRequest + 60000L) ){
	  if( --dnsTries <= 0 ) 
	    return 0;		// Failed to allocate address

          dns_state=DNS_STATE_INIT;
          lastDnsRequest = millis();
        }
        // don't try to use client before
        // we have a result of dns-lookup

        continue;
      }
    } 
    else {
      if (dns_state==DNS_STATE_REQUESTED && udp_client_check_for_dns_answer( buf, plen ) ){
        dns_state=DNS_STATE_ANSWER;
        //client_set_wwwip(dnslkup_getip());
        client_tcp_set_serverip(dnslkup_getip());
	gotAddress = true;
      }
    }
  }
  
  return 1;
}
Exemplo n.º 2
0
// prepare the webpage by writing the data to the tcp send buffer
uint16_t print_webpage(uint8_t *buf)
{
        uint16_t plen;
        char vstr[15];
        plen=http200ok();
        plen=fill_tcp_data_p(buf,plen,PSTR("<a href=/>[refresh]</a>"));
        plen=fill_tcp_data_p(buf,plen,PSTR("<h2>identi.ca notification status</h2>\n<pre>\n"));
        if (client_waiting_gw()){
                plen=fill_tcp_data_p(buf,plen,PSTR("waiting for GW IP to answer arp.\n"));
                return(plen);
        }
        if (dns_state==1){
                plen=fill_tcp_data_p(buf,plen,PSTR("waiting for DNS answer.\n"));
                return(plen);
        }
        /* // debug
        plen=fill_tcp_data_p(buf,plen,PSTR("\nweb IP:\n"));
        mk_net_str(vstr, dnslkup_getip() ,4,'.',10);
        plen=fill_tcp_data(buf,plen,vstr);
        plen=fill_tcp_data_p(buf,plen,PSTR("\n"));
        */

        plen=fill_tcp_data_p(buf,plen,PSTR("Num of PD6 to GND connections: "));
        // convert number to string:
        itoa(contact_onoff_cnt,vstr,10);
        plen=fill_tcp_data(buf,plen,vstr);
        plen=fill_tcp_data_p(buf,plen,PSTR("\nNum of identi.ca attempts: "));
        // convert number to string:
        itoa(web_client_attempts,vstr,10);
        plen=fill_tcp_data(buf,plen,vstr);
        plen=fill_tcp_data_p(buf,plen,PSTR("\nNum successful identi.ca: "));
        // convert number to string:
        itoa(web_client_sendok,vstr,10);
        plen=fill_tcp_data(buf,plen,vstr);
        plen=fill_tcp_data_p(buf,plen,PSTR("\nDate of last identi.ca: "));
        plen=fill_tcp_data(buf,plen,datebuf);
        plen=fill_tcp_data_p(buf,plen,PSTR("\nTwitter notify is: "));
        if (start_web_client==4){
                plen=fill_tcp_data_p(buf,plen,PSTR("OFF"));
        }else{
                plen=fill_tcp_data_p(buf,plen,PSTR("ON"));
        }
        plen=fill_tcp_data_p(buf,plen,PSTR("\n<form action=/ method=get>\npassw: <input type=password size=8 name=pw><input type=hidden name=mn "));
        if (start_web_client==4){
                plen=fill_tcp_data_p(buf,plen,PSTR("value=1><input type=submit value=\"enable identi.ca msg\">"));
        }else{
                plen=fill_tcp_data_p(buf,plen,PSTR("value=0><input type=submit value=\"disable identi.ca msg\">"));
        }
        plen=fill_tcp_data_p(buf,plen,PSTR("</form>\n</pre><br><hr>tuxgraphics.org"));
        return(plen);
}
Exemplo n.º 3
0
int main(void){

        
        uint16_t dat_p,plen;
        int8_t cmd;
        
        // Set the clock speed to "no pre-scaler" (8MHz with internal osc or 
        // full external speed)
        // set the clock prescaler. First write CLKPCE to enable setting 
        // of clock the next four instructions.
        // Note that the CKDIV8 Fuse determines the initial
        // value of the CKKPS bits.
        CLKPR=(1<<CLKPCE); // change enable
        CLKPR=0; // "no pre-scaler"
        _delay_loop_1(0); // 60us


        /*initialize enc28j60*/
        enc28j60Init(mymac);
        enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
        _delay_loop_1(0); // 60us
        
        /* Magjack leds configuration, see enc28j60 datasheet, page 11 */
        // LEDB=yellow LEDA=green
        //
        // 0x476 is PHLCON LEDA=links status, LEDB=receive/transmit
        // enc28j60PhyWrite(PHLCON,0b0000 0100 0111 01 10);
        enc28j60PhyWrite(PHLCON,0x476);
        
        DDRB|= (1<<DDB1); // LED, enable PB1, LED as output
        LEDOFF;

        DDRD&= ~(1<<DDD6); // enable PB6, as input
        PORTD|= (1<<PIND6); // internal pullup resistor on

        init_cnt2();
        sei();

        //init the web server ethernet/ip layer:
        init_ip_arp_udp_tcp(mymac,myip,MYWWWPORT);
        // init the web client:
        client_set_gwip(gwip);  // e.g internal IP of dsl router
        //
        while(1){
                // handle ping and wait for a tcp packet
                plen=enc28j60PacketReceive(BUFFER_SIZE, buf);
                dat_p=packetloop_icmp_tcp(buf,plen);
                if(plen==0){
                        // we are idle here
                        if (client_waiting_gw() ){
                                continue;
                        }
                        if (dns_state==0){
                                sec=0;
                                dns_state=1;
                                dnslkup_request(buf,PSTR(WEBSERVER_VHOST));
                                continue;
                        }
                        if (dns_state==1 && dnslkup_haveanswer()){
                                dns_state=2;
                                client_set_wwwip(dnslkup_getip());
                        }
                        if (dns_state!=2){
                                // retry every minute if dns-lookup failed:
                                if (sec > 60){
                                        dns_state=0;
                                }
                                // don't try to use web client before
                                // we have a result of dns-lookup
                                continue;
                        }
                        //----------
                        if (start_web_client==1){
                                LEDON;
                                start_web_client=2;
                                sec=0;
                                web_client_attempts++;
                                // the identi.ca line is status=Url_encoded_string
                                strcat(statusstr,"status=");
                                // the text to send to identi.ca (append after status=):
                                //urlencode("Meals are ready",&(statusstr[7]));
                                urlencode("I like tuxgraphics eth boards, ",&(statusstr[7]));
                                // append a number:
                                itoa(web_client_attempts,&(statusstr[strlen(statusstr)]),10);
                                // The BLOGGACCOUNT Authorization code can be generated from 
                                // username and password of your identi.ca account 
                                // by using this encoder: http://tuxgraphics.org/~guido/javascript/base64-javascript.html
                                client_http_post(PSTR("/api/statuses/update.xml"),PSTR(WEBSERVER_VHOST),PSTR(BLOGGACCOUNT),statusstr,&browserresult_callback);
                        }
                        // count how often the switch was triggered at all:
                        if (contact_debounce==0 && bit_is_clear(PIND,PIND6)){
                                contact_onoff_cnt++;
                                contact_debounce=1;
                        }
                        // we send only a request if we are in the right state (do
                        // not flood with request):
                        if (start_web_client==0 && bit_is_clear(PIND,PIND6)){
                                resend=1; // resend once if it failed
                                start_web_client=1;
                        }
                        // Reset after a delay of 3 min to prevent email sending.
                        // We reset only if the contact on PD6 was released.
                        if (start_web_client<=3 && sec==180 && !bit_is_clear(PIND,PIND6)){
                                start_web_client=0;
                        }
                        // Resend the message if it failed:
                        if (start_web_client==2 && sec==7 && resend){
                                start_web_client=1;
                                resend--;
                        }
                        continue;
                }
                if(dat_p==0){ // plen!=0
                        // check for incomming messages not processed 
                        // as part of packetloop_icmp_tcp, e.g udp messages
                        udp_client_check_for_dns_answer(buf,plen);
                        continue;
                }
                        
                if (strncmp("GET ",(char *)&(buf[dat_p]),4)!=0){
                        // head, post and other methods:
                        //
                        // for possible status codes see:
                        // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
                        dat_p=http200ok();
                        dat_p=fill_tcp_data_p(buf,dat_p,PSTR("<h1>200 OK</h1>"));
                        goto SENDTCP;
                }
                cmd=analyse_get_url((char *)&(buf[dat_p+4]));
                // for possible status codes see:
                // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
                if (cmd==-1){
                        dat_p=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 401 Unauthorized\r\nContent-Type: text/html\r\n\r\n<h1>401 Unauthorized</h1>"));
                        goto SENDTCP;
                }
                if (cmd==1 && start_web_client==4){
                        // email was off, switch on
                        start_web_client=0;
                }
                if (cmd==0 ){
                        start_web_client=4; // email off
                }
                dat_p=http200ok();
                dat_p=print_webpage(buf);
                //
SENDTCP:
                www_server_reply(buf,dat_p); // send data

        }
        return (0);
}
Exemplo n.º 4
0
uint8_t EtherShield::ES_client_waiting_gw() {
	return( client_waiting_gw() );
}