// 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;
}
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);
}
int main(void) {
static uint8_t buffer[BufferSize + 1];
int8_t i;
uint8_t message[4] = { 0, 0, CID, P2CID };
uint16_t received;
snesIO port0 = 0xffff, port1 = 0xffff;
// Initialise basic I/O.
initLed();
initInput();
initOutput();
// Switched mode: B + Y.
port0 = recvInput();
if (port0 == 0xfffc) {
switchedMode = Enabled;
ledSignal(5);
}
ledOnRed();
// Initialise network interface.
enc28j60Init(mymac);
_delay_ms(100);
// 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);
_delay_ms(100);
// Get the initial IP via DHCP and configure network.
init_mac(mymac);
while (i != 1) {
received = enc28j60PacketReceive(BufferSize, buffer);
buffer[BufferSize] = '\0';
i = packetloop_dhcp_initial_ip_assignment(buffer, received, mymac[5]);
}
dhcp_get_my_ip(myip, netmask, gwip);
client_ifconfig(myip, netmask);
// Resolve MAC address from server IP.
if (route_via_gw(serverip)) // Must be routed via gateway.
get_mac_with_arp(gwip, TransNumGwmac, &arpresolverResultCallback);
else // Server is on local network.
get_mac_with_arp(serverip, TransNumGwmac, &arpresolverResultCallback);
while (get_mac_with_arp_wait()) {
received = enc28j60PacketReceive(BufferSize, buffer);
// Call packetloop to process ARP reply.
packetloop_arp_icmp_tcp(buffer, received);
}
// Lookup DNS of the server hostname.
while (dnslkup_haveanswer() != 1) {
uint16_t tmp;
received = enc28j60PacketReceive(BufferSize, buffer);
tmp = packetloop_arp_icmp_tcp(buffer, received);
if (received == 0) {
if (!enc28j60linkup()) continue;
dnslkup_request(buffer, ServerVHost, gwmac);
_delay_ms(100);
continue;
}
if (tmp == 0)
udp_client_check_for_dns_answer(buffer, received);
}
dnslkup_get_ip(serverip);
ledOnGreen(); // Connected.
while (1) { // Main loop start.
received = enc28j60PacketReceive(BufferSize, buffer);
// Software reset: L + R + Select + Start.
if (port0 == 0xf3f3) reset();
// Do something while no packet in queue.
if (received == 0) {
port0 = recvInput();
// Prepare message and send it to the server.
for (i = 0; i < 8; i++) { // Lo-Byte.
char *c = message;
*c = port0 & (1 << i)
? *c | (1 << i)
: *c & ~(1 << i);
}
for (i = 0; i < 8; i++) { // Hi-Byte.
char *c = message + 1;
*c = port0 & (1 << i + 8)
? *c | (1 << i)
: *c & ~(1 << i);
}
send_udp(buffer, message, sizeof(message), 57351, serverip, 57350, gwmac);
// Send controller data to SNES.
if (switchedMode == Disabled)
sendOutput(port0, port1);
else
sendOutput(port1, port0);
continue;
}
// Answer to ARP requests.
if (eth_type_is_arp_and_my_ip(buffer, received)) {
make_arp_answer_from_request(buffer, received);
continue;
}
// Check if IP packets (ICMP or UDP) are for us.
if (eth_type_is_ip_and_my_ip(buffer, received) == 0)
continue;
// Answer ping with pong.
if (
buffer[IP_PROTO_P] == IP_PROTO_ICMP_V &&
buffer[ICMP_TYPE_P] == ICMP_TYPE_ECHOREQUEST_V) {
make_echo_reply_from_request(buffer, received);
continue;
}
// Listen for UDP packets on port 57351 (0xe007) and process
// received data.
if (
buffer[IP_PROTO_P] == IP_PROTO_UDP_V &&
buffer[UDP_DST_PORT_H_P] == 0xe0 &&
buffer[UDP_DST_PORT_L_P] == 0x07) {
for (i = 0; i < 8; i++) {
uint16_t *c = &port1;
*c = buffer[UDP_DATA_P] & (1 << i)
? *c | (1 << i)
: *c & ~(1 << i);
}
for (i = 0; i < 8; i++) {
uint16_t *c = &port1;
*c = buffer[UDP_DATA_P + 1] & (1 << i)
? *c | (1 << i + 8)
: *c & ~(1 << i + 8);
}
}
} // Main loop end.
return (0);
}
void EtherShield::ES_dnslkup_request(uint8_t *buf,uint8_t *hostname) {
return( dnslkup_request(buf, hostname) );
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(www_client_thread(struct pt *pt))
{
PT_BEGIN(pt);
while(1)
{
/* TODO: Add debouncing ... */
PT_WAIT_UNTIL(pt,btn2_pressed());
PT_WAIT_UNTIL(pt,!btn2_pressed());
dbg(PSTR("> Web client starts.\r\n"));
retry_count = 0;
do
{
/* disable interrupts */
cli();
/* reset timeout counter */
www_client_counter = 0;
/* re-enable interrupts */
sei();
/* make a dns request */
dnslkup_request(buf,URL_base_address,gwmac);
/* wait an answer ... */
PT_WAIT_UNTIL(pt,dnslkup_haveanswer()||www_client_timeout());
if(dnslkup_haveanswer())
{
/* exit the loop */
retry_count = 0xFF;
}
else
{
dbg(PSTR("> DNS lookup timeout!\r\n"));
retry_count++;
}
}
while(retry_count < 5);
if(dnslkup_haveanswer())
{
/* save the received IP to your userspace variable */
dnslkup_get_ip(otherside_www_ip);
/* reset callback state */
www_callback_state = 0;
/* reset retry count */
retry_count = 0;
/* browsing action */
do
{
/* disable interrupts */
cli();
/* reset timeout counter */
www_client_counter = 0;
/* re-enable interrupts */
sei();
/* increment the trial counter */
retry_count++;
client_browse_url(
PSTR("/ws.php?c="), /* constant part of the URL suffix */
"Samsun", /* variable part of the URL which comes after the constant suffix */
URL_base_address, /* base-name of the web page we want to browse */
&browserresult_callback, /* callback function for our URL browsing attempt */
otherside_www_ip, /* IP representation of the webpage host */
gwmac /* mac address of our gateway */
);
/* wait ... */
PT_WAIT_UNTIL(pt,www_client_failed() || www_client_timeout() || www_client_ok() || return_counter() );
if(www_client_ok())
{
/* exit the loop */
retry_count = 0xFF;
}
else if(www_client_failed())
{
dbg(PSTR("> Browsing problem!\r\n"));
}
else if(www_client_timeout())
{
dbg(PSTR("> Browsing timeout!\r\n"));
}
}
while(retry_count < 5);
if(retry_count == 0xFF)
{
dbg(PSTR("> Browsing went ok!\r\n"));
}
else
{
dbg(PSTR("> Browsing failed!\r\n"));
}
dbg(PSTR("> -------------------------------------\r\n"));
}
else
{
dbg(PSTR("> Browsing failed!\r\n"));
dbg(PSTR("> -------------------------------------\r\n"));
}
}
PT_END(pt);
}
