int simple_servercycle(void)
{
uchar tIPAddr[4];
char i,nS,freeSlot;
unsigned int j;
// OSTimeDlyHMSM(0, 0, 0, 50);
// get the next new packet:
plen = enc28j60PacketReceive(BUFFER_SIZE, fbuf);
//USART_DMASendData(USART1,fbuf,plen);
/*plen will ne unequal to zero if there is a valid packet (without crc error) */
if(plen==0)
{
return;
}
// arp is broadcast if unknown but a host may also
// verify the mac address by sending it to
// a unicast address.
if(eth_type_is_arp_and_my_ip(fbuf,plen))
{
make_arp_answer_from_request(fbuf);
//USART_DMASendText(USART1,"make_arp_answer_from_request\n");
return;
}
// check if ip packets are for us:
if(eth_type_is_ip_and_my_ip(fbuf,plen)==0)
{
return;
}
if(fbuf[IP_PROTO_P]==IP_PROTO_ICMP_V && fbuf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V)
{
// a ping packet, let's send pong
make_echo_reply_from_request(fbuf, plen);
//USART_DMASendText(USART1,"make_echo_reply_from_request\n");
return;
}
// tcp port www start, compare only the lower byte
if (fbuf[IP_PROTO_P]==IP_PROTO_TCP_V&&fbuf[TCP_DST_PORT_H_P]==(*PORTNUMBER)/256&&fbuf[TCP_DST_PORT_L_P]==(*PORTNUMBER)%256)
{
nS=101;
freeSlot=9;
for (i=0;i<MAX_SOCKET_COUNT;i++)
{
Sockets[i].Timeout--;
if (Sockets[i].Timeout<0)
{
Sockets[i].Timeout=0;
Sockets[i].IP_PHASE=0;
}
if (!Sockets[i].IP_PHASE) freeSlot=i;
BufCpy(tIPAddr,Sockets[i].IP_source,4);
if (check_ip_scr(fbuf,tIPAddr))
{
nS=i;break;
}
}
if (nS>100) nS=freeSlot;
//nS=0;
if (fbuf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V)
{
make_tcp_synack_from_syn(fbuf);
// make_tcp_synack_from_syn does already send the syn,ack
Sockets[nS].IP_PHASE=ETH_HEAD;
Sockets[nS].Timeout=20;
BufCpy(Sockets[nS].IP_source,tIPAddr,4);
return;
}
if (fbuf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V)
{
GlobData++;
init_len_info(fbuf); // init some data structures
// we can possibly have no data, just ack:
dat_p=get_tcp_data_pointer();
if (dat_p==0)
{
if (fbuf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V)
{
// finack, answer with ack
make_tcp_ack_from_any(fbuf);
return;
}
// just an ack with no data, wait for next packet
}
else
{
j=checksum(&fbuf[IP_SRC_P], 8+TCP_HEADER_LEN_PLAIN+info_data_len,2);
if (j) return;
}
check_ip_scr(fbuf,tIPAddr);
// GlobData++;
BufCpy(Sockets[nS].IP_source,tIPAddr,4);
SocketUpdate(nS,fbuf,dat_p,&plen);
if (plen)
make_tcp_ack_with_data(fbuf,plen,0); // send data
else
make_tcp_ack_from_any(fbuf); // send ack for http get
return;
}
}
// tcp port www end
//
}
void EtherShield::ES_make_tcp_synack_from_syn(uint8_t *buf) {
make_tcp_synack_from_syn(buf);
}
int main(void){
uint16_t plen;
uint16_t dat_p;
uint8_t i=0;
uint8_t payloadlen=0;
// set the clock speed to 8MHz
// set the clock prescaler. First write CLKPCE to enable setting of clock the
// next four instructions.
//CLKPR=(1<<CLKPCE);
//CLKPR=0; // 8 MHZ
_delay_loop_1(50); // 12ms
// LED
/* enable PB1, LED as output */
DDRB|= (1<<DDB1);
/* one blink for indicate of start programm */
cbi(PORTB, PORTB1); // on
_delay_ms(100);
sbi(PORTB,PORTB1); // off
_delay_ms(100);
cbi(PORTB,PORTB1); // on
/*initialize enc28j60*/
enc28j60Init(mymac);
enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
_delay_loop_1(50); // 12ms
/* 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_loop_1(50); // 12ms
/* set output to GND, red LED on */
PORTB &= ~(1<<PORTB1);
i=1;
//init the ethernet/ip layer:
init_ip_arp_udp_tcp(mymac,myip,MYWWWPORT);
while(1){
// get the next new packet:
plen = enc28j60PacketReceive(BUFFER_SIZE, buf);
/*plen will ne unequal to zero if there is a valid
* packet (without crc error) */
if(plen==0){
continue;
}
// arp is broadcast if unknown but a host may also
// verify the mac address by sending it to
// a unicast address.
if(eth_type_is_arp_and_my_ip(buf,plen)){
make_arp_answer_from_request(buf);
continue;
}
// check if ip packets (icmp or udp) are for us:
if(eth_type_is_ip_and_my_ip(buf,plen)==0){
continue;
}
if (i){
/* set output to Vcc, LED off */
PORTB|= (1<<PORTB1);
i=0;
}else{
/* set output to GND, LED on */
PORTB &= ~(1<<PORTB1);
i=1;
}
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
// a ping packet, let's send pong
make_echo_reply_from_request(buf,plen);
continue;
}
// tcp port www start, compare only the lower byte
if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==MYWWWPORT){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V){
make_tcp_synack_from_syn(buf);
// make_tcp_synack_from_syn does already send the syn,ack
continue;
}
if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V){
init_len_info(buf); // init some data structures
// we can possibly have no data, just ack:
dat_p=get_tcp_data_pointer();
if (dat_p==0){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V){
// finack, answer with ack
make_tcp_ack_from_any(buf);
}
// just an ack with no data, wait for next packet
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
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>"));
}else{
// the "get" method
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<p>OK, it works</p>"));
}
make_tcp_ack_from_any(buf); // send ack for http get
make_tcp_ack_with_data(buf,plen); // send data
continue;
}
}
// udp interface:
if (buf[IP_PROTO_P]==IP_PROTO_UDP_V){
payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN;
// the received command has to start with t and be 4 char long
// e.g "test\0"
if (buf[UDP_DATA_P]=='t' && payloadlen==5){
make_udp_reply_from_request(buf,"hello",6,MYUDPPORT);
}
}
}
return (0);
}
int simple_server(void)
{
unsigned int plen;
unsigned int dat_p;
unsigned char i=0;
unsigned char cmd_pos=0;
unsigned char cmd;
unsigned char payloadlen=0;
char str[30];
char cmdval;
// Del_1ms(100);
/*initialize enc28j60*/
enc28j60Init(mymac);
init_ip_arp_udp_tcp(mymac,myip,mywwwport);
//ָʾµÆ״̬:0x476 is PHLCON LEDA(ÂÌ)=links status, LEDB(ºì)=receive/transmit
enc28j60PhyWrite(PHLCON,0x7a4);
enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
// Del_1ms(20);
//init the ethernet/ip layer:
while(1)
{
// OSTimeDlyHMSM(0, 0, 0, 50);
// get the next new packet:
plen = enc28j60PacketReceive(BUFFER_SIZE, buf);
//USART_DMASendData(USART1,buf,plen);
/*plen will ne unequal to zero if there is a valid packet (without crc error) */
if(plen==0)
{
continue;
}
// arp is broadcast if unknown but a host may also
// verify the mac address by sending it to
// a unicast address.
if(eth_type_is_arp_and_my_ip(buf,plen))
{
make_arp_answer_from_request(buf);
//USART_DMASendText(USART1,"make_arp_answer_from_request\n");
continue;
}
// check if ip packets are for us:
if(eth_type_is_ip_and_my_ip(buf,plen)==0)
{
continue;
}
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V)
{
// a ping packet, let's send pong
make_echo_reply_from_request(buf, plen);
//USART_DMASendText(USART1,"make_echo_reply_from_request\n");
continue;
}
// tcp port www start, compare only the lower byte
if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==mywwwport)
{
if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V)
{
make_tcp_synack_from_syn(buf);
// make_tcp_synack_from_syn does already send the syn,ack
continue;
}
if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V)
{
init_len_info(buf); // init some data structures
// we can possibly have no data, just ack:
dat_p=get_tcp_data_pointer();
if (dat_p==0)
{
if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V)
{
// finack, answer with ack
make_tcp_ack_from_any(buf);
}
// just an ack with no data, wait for next packet
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
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>"));
goto SENDTCP;
}
if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0)
{
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"));
plen=fill_tcp_data_p(buf,plen,PSTR("<p>Usage: "));
plen=fill_tcp_data(buf,plen,baseurl);
plen=fill_tcp_data_p(buf,plen,PSTR("password</p>"));
goto SENDTCP;
}
cmd=analyse_get_url((char *)&(buf[dat_p+5]));
// for possible status codes see:
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
if (cmd==-1)
{
plen=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)
{
//PORTD|= (1<<PD7);// transistor on
//IOCLR |= (1<<26);
// LED1ON();
i=1;
}
if (cmd==0)
{
//PORTD &= ~(1<<PD7);// transistor off
//IOSET |= (1<<26);
// LED1OFF();
i=0;
}
// if (cmd==-2) or any other value
// just display the status:
plen=print_webpage(buf,(i));
SENDTCP:
make_tcp_ack_from_any(buf); // send ack for http get
make_tcp_ack_with_data(buf,plen); // send data
continue;
}
}
// tcp port www end
//
// udp start, we listen on udp port 1200=0x4B0
if (buf[IP_PROTO_P]==IP_PROTO_UDP_V&&buf[UDP_DST_PORT_H_P]==4&&buf[UDP_DST_PORT_L_P]==0xb0)
{
payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN;
// you must sent a string starting with v
// e.g udpcom version 10.0.0.24
if (verify_password((char *)&(buf[UDP_DATA_P])))
{
// find the first comma which indicates
// the start of a command:
cmd_pos=0;
while(cmd_pos<payloadlen)
{
cmd_pos++;
if (buf[UDP_DATA_P+cmd_pos]==',')
{
cmd_pos++; // put on start of cmd
break;
}
}
// a command is one char and a value. At
// least 3 characters long. It has an '=' on
// position 2:
if (cmd_pos<2 || cmd_pos>payloadlen-3 || buf[UDP_DATA_P+cmd_pos+1]!='=')
{
strcpy(str,"e=no_cmd");
goto ANSWER;
}
// supported commands are
// t=1 t=0 t=?
if (buf[UDP_DATA_P+cmd_pos]=='t')
{
cmdval=buf[UDP_DATA_P+cmd_pos+2];
if(cmdval=='1')
{
//PORTD|= (1<<PD7);// transistor on
//IOCLR |= (1<<26);
//LED1ON();
strcpy(str,"t=1");
goto ANSWER;
}
else if(cmdval=='0')
{
//PORTD &= ~(1<<PD7);// transistor off
//IOSET |= (1<<26);
//LED1OFF();
strcpy(str,"t=0");
goto ANSWER;
}
else if(cmdval=='?')
{
/*
if (IOPIN & (1<<26))
{
strcpy(str,"t=1");
goto ANSWER;
}
*/
strcpy(str,"t=0");
goto ANSWER;
}
}
strcpy(str,"e=no_such_cmd");
goto ANSWER;
}
strcpy(str,"e=invalid_pw");
ANSWER:
make_udp_reply_from_request(buf,str,strlen(str),myudpport);
}
}
// return (0);
}
void flushSockets() {
if (!(packetLength = enc28j60PacketReceive(BUFFER_SIZE, buffer))) { //No packet available for reading!
return;
}
else if (eth_type_is_arp_and_my_ip(buffer, packetLength)) {
if (arp_packet_is_myreply_arp(buffer)) {
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug("Received ARP reply.\r\n");
#endif
// Add it to the arp cache list
add_arpcacheentry(buffer+ETH_SRC_MAC_P, buffer+ETH_ARP_DST_IP_P);
}
else {
make_arp_answer_from_request(buffer);
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug("Answering ARP request.\r\n");
#endif
}
}
else if (!eth_type_is_ip_and_my_ip(buffer, packetLength)) {
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug("Ignoring packet not for me.\r\n");
#endif
return;
}
else if (buffer[IP_PROTO_P] == IP_PROTO_ICMP_V &&
buffer[ICMP_TYPE_P] == ICMP_TYPE_ECHOREQUEST_V) {
make_echo_reply_from_request(buffer, packetLength);
#ifdef ETHERSHIELD_DEBUG
sprintf(debugStr, "Replying ICMP ECHO REQUEST from %d.%d.%d.%d.\r\n",
buffer[IP_SRC_IP_P], buffer[IP_SRC_IP_P + 1],
buffer[IP_SRC_IP_P + 2], buffer[IP_SRC_IP_P + 3]);
ethershieldDebug(debugStr);
#endif
}
else if (buffer[IP_PROTO_P] == IP_PROTO_TCP_V) {
//DEBUG: it's TCP and for me! Do I want it?
uint16_t destinationPort = (buffer[TCP_DST_PORT_H_P] << 8) | buffer[TCP_DST_PORT_L_P];
#ifdef ETHERSHIELD_DEBUG
sprintf(debugStr, "Received TCP packet from %d.%d.%d.%d:%u on port %d\r\n",
buffer[IP_SRC_IP_P], buffer[IP_SRC_IP_P + 1],
buffer[IP_SRC_IP_P + 2], buffer[IP_SRC_IP_P + 3],
(buffer[TCP_SRC_PORT_H_P] << 8) | buffer[TCP_SRC_PORT_L_P],
destinationPort);
ethershieldDebug(debugStr);
#endif
uint8_t i, socketSelected = MAX_SOCK_NUM;
for (i = 0; i < MAX_SOCK_NUM; i++) {
if (_SOCKETS[i].sourcePort == destinationPort) {
socketSelected = i;
if(_SOCKETS[i].state == SOCK_LISTEN) {
_SOCKETS[i].destinationPort = (buffer[TCP_SRC_PORT_H_P] << 8) | buffer[TCP_SRC_PORT_L_P];
memcpy(_SOCKETS[i].destinationIp, &buffer[IP_SRC_IP_P], 4);
}
break;
}
}
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug(" Socket selected: ");
itoa(socketSelected, debugStr, 10);
ethershieldDebug(debugStr);
ethershieldDebug("\r\n");
#endif
if (socketSelected == MAX_SOCK_NUM) {
//TODO: reply and say that nobody is listening on that port
return;
}
//TODO: change next 'if' to 'else if'
//DEBUG: ok, the TCP packet is for me and I want it.
if (buffer[TCP_FLAGS_P] == (TCP_FLAG_SYN_V | TCP_FLAG_ACK_V)) {
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug(" It is TCP SYNACK, sending ACK\r\n");
#endif
make_tcp_ack_from_any(buffer);
//TODO: verify if I'm waiting for this SYN+ACK
_SOCKETS[socketSelected].clientState = SOCK_ESTABLISHED;
return;
}
else if (buffer[TCP_FLAGS_P] & TCP_FLAGS_SYN_V) {
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug(" It is TCP SYN, sending SYNACK\r\n");
#endif
_SOCKETS[socketSelected].state = SOCK_ESTABLISHED;
make_tcp_synack_from_syn(buffer);
}
else if (buffer[TCP_FLAGS_P] & TCP_FLAGS_ACK_V) {
uint16_t data;
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug(" Got an ACK...\r\n");
#endif
init_len_info(buffer);
_SOCKETS[socketSelected].packets = 0;
_SOCKETS[socketSelected].ackNumber = (uint32_t)buffer[TCP_SEQ_H_P] << 24 | (uint32_t)buffer[TCP_SEQ_H_P + 1] << 16 | (uint32_t)buffer[TCP_SEQ_L_P] << 8 | (uint32_t)buffer[TCP_SEQ_L_P + 1];
data = get_tcp_data_pointer();
if (!data) {
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug(" It is ACK with no data\r\n");
#endif
if (buffer[TCP_FLAGS_P] & TCP_FLAGS_FIN_V) {
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug(" It is ACKFIN, closing socket\r\n");
#endif
make_tcp_ack_from_any(buffer);
_SOCKETS[socketSelected].state = SOCK_CLOSED;
_SOCKETS[socketSelected].sendPacketLength = 0;
_SOCKETS[socketSelected].ackNumber = 0;
_SOCKETS[socketSelected].sentData = 0;
_SOCKETS[socketSelected].packets = 0;
free(_SOCKETS[socketSelected].dataBuffer);
_SOCKETS[socketSelected].bytesToRead = 0;
}
return;
}
else {
int dataSize;
make_tcp_ack_from_any(buffer); //TODO-ACK
_SOCKETS[socketSelected].ackNumber = (uint32_t)buffer[TCP_SEQACK_H_P] << 24 | (uint32_t)buffer[TCP_SEQACK_H_P + 1] << 16 | (uint32_t)buffer[TCP_SEQACK_L_P] << 8 | (uint32_t)buffer[TCP_SEQACK_L_P + 1];
dataSize = packetLength - (&buffer[data] - buffer);
#ifdef ETHERSHIELD_DEBUG
itoa(dataSize, debugStr, 10);
ethershieldDebug(" It is ACK with data, ACK sent\r\n");
ethershieldDebug(" # bytes: ");
ethershieldDebug(debugStr);
ethershieldDebug("\r\n");
#endif
_SOCKETS[socketSelected].state = SOCK_ESTABLISHED;
if(_SOCKETS[socketSelected].bytesToRead > 0) {
_SOCKETS[socketSelected].dataBuffer = realloc(_SOCKETS[socketSelected].dataBuffer, _SOCKETS[socketSelected].bytesToRead + (dataSize * sizeof(char))); //TODO: and about the TCP/IP/Ethernet overhead?
memcpy(_SOCKETS[socketSelected].dataBuffer+_SOCKETS[socketSelected].bytesToRead, &buffer[data], dataSize);
} else {
_SOCKETS[socketSelected].dataBuffer = malloc(dataSize * sizeof(char)); //TODO: and about the TCP/IP/Ethernet overhead?
memcpy(_SOCKETS[socketSelected].dataBuffer, &buffer[data], dataSize);
}
//TODO: Add handler to malloc returning: No enough SRAM)
_SOCKETS[socketSelected].bytesToRead += dataSize;
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug(" Data:\r\n");
for (i = 0; i < dataSize; i++) {
serial_write(_SOCKETS[socketSelected].dataBuffer[i]);
}
ethershieldDebug("\r\n");
#endif
return;
}
}
else {
#ifdef ETHERSHIELD_DEBUG
ethershieldDebug("Don't know what to do!\r\n");
#endif
//make_tcp_ack_from_any(buffer); //TODO-ACK: send ACK using tcp_client_send_packet
}
}
}
int main(void){
uint16_t plen;
uint16_t dat_p;
uint8_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.
CLKPR=(1<<CLKPCE); // change enable
CLKPR=0; // "no pre-scaler"
uartInit();
uartSetBaudRate(9600);
_delay_loop_1(50); // 12ms
/* enable PD2/INT0, as input */
DDRD&= ~(1<<DDD2);
// test button
cbi(DDRD,PIND6);
sbi(PORTD,PIND6); // internal pullup resistor on
_delay_loop_1(50); // 12ms
// read eeprom values unless, the PD6 pin is connected to GND during bootup
// PD6 is used to reset to factory default. Note that factory default is
// not stored back to eeprom.
if (eeprom_read_byte((uint8_t *)0x0) == 19 && ! bit_is_clear(PIND,PIND6)){
// ok magic number matches accept values
eeprom_read_block((uint8_t *)myip,(void *)1,sizeof(myip));
eeprom_read_block((uint8_t *)monitoredhost,(void *)6,sizeof(monitoredhost));
pinginterval=eeprom_read_byte((uint8_t *)11);
sendping=eeprom_read_byte((uint8_t *)12);
eeprom_read_block((char *)password,(void *)13,sizeof(password));
password[7]='\0'; // make sure it is terminated, should not be necessary
}
/*initialize enc28j60*/
enc28j60Init(mymac);
enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
_delay_loop_1(50); // 12ms
// LED
/* enable PB1, LED as output */
//DDRB|= (1<<DDB1);
/* set output to Vcc, LED off */
//LEDOFF;
// the transistor on PD7
DDRD|= (1<<DDD7);
PORTD &= ~(1<<PIND7);// transistor off
/* 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_loop_1(50); // 12ms
//init the ethernet/ip layer:
init_ip_arp_udp_tcp(mymac,myip,MYWWWPORT);
timer_init();
_delay_ms(1000);
uartFlushReceiveBuffer();
sei(); // interrupt enable
while(1){
//uartSendByte('a');
//checkForEthPacket(ethPacket);
stop_timer=2;
if (checkForEthPacket(ethPacket))
{
sendEthPacket(time, sm);
time.hr = 99;
}
stop_timer=0;
// wait_data++;
// if (wait_data>40)
// wait_data=0;
//_delay_ms(500);
// spontanious messages must not interfer with
// web pages
if (pagelock==0 && enc28j60hasRxPkt()==0){
if (sendping && havemac==0){
client_arp_whohas(buf,monitoredhost);
havemac=2;
}
if (sendping && havemac==1 && pingnow){
pingnow=0;
client_icmp_request(buf,monitoredhost,PINGPATTERN);
pingtimer++; // otheweise we would call this function again
hoststatus++;
if (hoststatus==0xff){
hoststatus=1; // wrap to 1
}
}
}
// get the next new packet:
plen = enc28j60PacketReceive(BUFFER_SIZE, buf);
/*plen will be unequal to zero if there is a valid
* packet (without crc error) */
if(plen==0){
continue;
}
// arp is broadcast if unknown but a host may also
// verify the mac address by sending it to
// a unicast address.
if(eth_type_is_arp_and_my_ip(buf,plen)){
if (eth_type_is_arp_req(buf)){
make_arp_answer_from_request(buf);
}
if (eth_type_is_arp_reply(buf)){
if (client_store_gw_mac(buf,monitoredhost)){
havemac=1;
}
}
continue;
}
// check if ip packets are for us:
if(eth_type_is_ip_and_my_ip(buf,plen)==0){
continue;
}
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREPLY_V){
if (buf[ICMP_DATA_P]== PINGPATTERN){
if (check_ip_message_is_from(buf,monitoredhost)){
// ping reply is from monitored host and ping was from us
hoststatus=0;
hostbackafterreboot=1;
}
}
}
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
if (check_ip_message_is_from(buf,monitoredhost)){
// ping is from monitored host
hoststatus=0;
hostbackafterreboot=1;
}
// a ping packet, let's send pong
make_echo_reply_from_request(buf,plen);
continue;
}
// tcp port www start, compare only the lower byte
if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==MYWWWPORT){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V){
make_tcp_synack_from_syn(buf);
// make_tcp_synack_from_syn does already send the syn,ack
continue;
}
if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V){
init_len_info(buf); // init some data structures
// we can possibly have no data, just ack:
dat_p=get_tcp_data_pointer();
if (dat_p==0){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V){
// finack, answer with ack
make_tcp_ack_from_any(buf);
}
// just an ack with no data, wait for next packet
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
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>"));
goto SENDTCP;
}
if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0){
plen=print_webpage(buf);
goto SENDTCP;
}
cmd=analyse_get_url((char *)&(buf[dat_p+5]));
pagelock=1; // stop automatic actions until webpage is displayed
//
// error, default, will get overwritte in case
// something else is selected:
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>Error</h1>"));
plen=fill_tcp_data(buf,plen,errmsg);
plen=fill_tcp_data_p(buf,plen,PSTR("<br><br><a href=/>->continue</a>\n"));
// for possible status codes see:
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
if (cmd==1){
resethost();
plen=print_webpage_confirm(buf);
}
if (cmd==2){
store_in_eeprom();
plen=print_webpage_confirm(buf);
}
if (cmd==7){
store_in_eeprom();
plen=print_webpage_confirm(buf);
reinitmac=1;
}
// start and stop of wd, this is not store in eeprom
if (cmd==5){
pingtimer=1; // wd on
plen=print_webpage_confirm(buf);
}
if (cmd==4){
pingtimer=0; // wd off
plen=print_webpage_confirm(buf);
}
if (cmd==3){
plen=print_webpage_now(buf);
}
if (cmd==6){
plen=print_webpage_config(buf);
}
// testing the temp OK / NOK
if (cmd==20){
sm[0].temp= atoi(strbuf);
plen=print_webpage_confirm(buf);
}
if (cmd==21){
sm[1].temp= atoi(strbuf);
plen=print_webpage_confirm(buf);
}
// on / off - slave-modules
// ON slave-module-1
if (cmd==34){
sm[0].status = atoi(strbuf);
plen=print_webpage_confirmrm1(buf);
}
// OFF slave-module-1
if (cmd==31){
sm[0].status = atoi(strbuf);
plen=print_webpage_confirmrm1(buf);
}
// ON slave-module-2
if (cmd==32){
sm[1].status = atoi(strbuf);
plen=print_webpage_confirmrm2(buf);
}
// OFF slave-module-2
if (cmd==33){
sm[1].status = atoi(strbuf);
plen=print_webpage_confirmrm2(buf);
}
if (cmd==35){
plen=print_webpage_confirmclk(buf);
}
if (cmd==36){
plen=print_webpage_confirmclk(buf);
}
// Room-1
if (cmd==10){
plen=print_webpage_room1(buf);
}
// ROom-2
if (cmd==11){
plen=print_webpage_room2(buf);
}
// Clock & date
if (cmd==12){
plen=print_webpage_clk(buf);
}
//
SENDTCP:
make_tcp_ack_from_any(buf); // send ack for http get
make_tcp_ack_with_data(buf,plen); // send data
continue;
}
}
// tcp port www end
//
// udp not implemented
}
return (0);
}
void ethernet_process(void)
{
uint16_t plen;
uint16_t dat_p;
uint8_t cmd_pos=0;
int8_t cmd;
uint8_t payloadlen=0;
char str[30];
char cmdval;
// get the next new packet:
plen = enc28j60PacketReceive(BUFFER_SIZE, buf);
buf[BUFFER_SIZE]='\0';
dat_p=packetloop_arp_icmp_tcp(buf,plen);
#if 0
// tcp port 80 begin
if (strncmp("GET ",(char *)&(buf[dat_p]),4)!=0)
{
// head, post and other methods:
dat_p=http200ok();
dat_p=ES_fill_tcp_data(buf,dat_p,"<h1>200 OK</h1>");
goto SENDTCP;
}
#endif
/*plen will ne unequal to zero if there is a valid
* packet (without crc error) */
if(plen==0)
{
//continue;
}
// arp is broadcast if unknown but a host may also
// verify the mac address by sending it to
// a unicast address.
if(eth_type_is_arp_and_my_ip(buf,plen))
{
make_arp_answer_from_request(buf);
//continue;
}
// check if ip packets are for us:
if(eth_type_is_ip_and_my_ip(buf,plen)==0)
{
//continue;
}
#ifdef _DEBUG_
// led----------
if (i){
/* set output to Vcc, LED off */
PORTB|= (1<<PORTB1);
i=0;
}else{
/* set output to GND, LED on */
PORTB &= ~(1<<PORTB1);
i=1;
}
#endif
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V)
{
// a ping packet, let's send pong
make_echo_reply_from_request(buf,plen);
//continue;
}
// tcp port www start, compare only the lower byte
if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==MYWWWPORT)
{
if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V)
{
make_tcp_synack_from_syn(buf);
// make_tcp_synack_from_syn does already send the syn,ack
//continue;
}
if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V)
{
init_len_info(buf); // init some data structures
// we can possibly have no data, just ack:
dat_p=get_tcp_data_pointer();
if (dat_p==0)
{
if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V)
{
// finack, answer with ack
make_tcp_ack_from_any(buf,1,0);
}
// just an ack with no data, wait for next packet
//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
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>"));
goto SENDTCP;
}
if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0)
{
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"));
plen=fill_tcp_data_p(buf,plen,PSTR("<p>Usage: http://host_or_ip/password</p>\n"));
goto SENDTCP;
}
cmd=analyse_get_url((char *)&(buf[dat_p+5]));
// for possible status codes see:
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
if (cmd==-1)
{
plen=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;
}
#ifdef _DEBUG_
if (cmd==1)
{
PORTD|= (1<<PORTD7);// transistor on
}
if (cmd==0)
{
PORTD &= ~(1<<PORTD7);// transistor off
}
#endif
if (cmd==-3)
{
// redirect to add a trailing slash
plen=moved_perm(buf);
goto SENDTCP;
}
#ifndef _DEBUG_
// if (cmd==-2) or any other value
// just display the status:
//plen=print_webpage(buf,(PORTD & (1<<PORTD7)));
plen=print_webpage(buf);
//
#endif
SENDTCP:
plen=print_webpage(buf);
make_tcp_ack_from_any(buf,1,0); // send ack for http get
make_tcp_ack_with_data(buf,plen); // send data
//continue;
}
}
// tcp port www end
//
// udp start, we listen on udp port 1200=0x4B0
if (buf[IP_PROTO_P]==IP_PROTO_UDP_V&&buf[UDP_DST_PORT_H_P]==4&&buf[UDP_DST_PORT_L_P]==0xb0)
{
payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN;
// you must sent a string starting with v
// e.g udpcom version 10.0.0.24
if (verify_password((char *)&(buf[UDP_DATA_P])))
{
// find the first comma which indicates
// the start of a command:
cmd_pos=0;
while(cmd_pos<payloadlen)
{
cmd_pos++;
if (buf[UDP_DATA_P+cmd_pos]==',')
{
cmd_pos++; // put on start of cmd
break;
}
}
// a command is one char and a value. At
// least 3 characters long. It has an '=' on
// position 2:
if (cmd_pos<2 || cmd_pos>payloadlen-3 || buf[UDP_DATA_P+cmd_pos+1]!='=')
{
strcpy(str,"e=no_cmd");
goto ANSWER;
}
// supported commands are
// t=1 t=0 t=?
if (buf[UDP_DATA_P+cmd_pos]=='t')
{
cmdval=buf[UDP_DATA_P+cmd_pos+2];
if(cmdval=='1')
{
//PORTD|= (1<<PORTD7);// transistor on
strcpy(str,"t=1");
goto ANSWER;
}
else if(cmdval=='0')
{
//PORTD &= ~(1<<PORTD7);// transistor off
strcpy(str,"t=0");
goto ANSWER;
}
else if(cmdval=='?')
{
// if (PORTD & (1<<PORTD7)){
// strcpy(str,"t=1");
// goto ANSWER;
// }
strcpy(str,"t=0");
goto ANSWER;
}
}
strcpy(str,"e=no_such_cmd");
goto ANSWER;
}
strcpy(str,"e=invalid_pw");
ANSWER:
make_udp_reply_from_request(buf,str,strlen(str),MYUDPPORT);
}
}
int main(void){
uint16_t plen;
uint16_t dat_p;
uint8_t i=0;
uint8_t payloadlen=0;
char str[20];
// set the clock speed to 8MHz
// set the clock prescaler. First write CLKPCE to enable setting of clock the
// next four instructions.
CLKPR=(1<<CLKPCE);
CLKPR=0; // 8 MHZ
_delay_loop_1(50); // 12ms
/*initialize enc28j60*/
enc28j60Init(mymac);
enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
_delay_loop_1(50); // 12ms
// LED
/* enable PB1, LED as output */
DDRB|= (1<<DDB1);
/* set output to Vcc, LED off */
PORTB|= (1<<PORTB1);
/* 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_loop_1(50); // 12ms
/* set output to GND, red LED on */
PORTB &= ~(1<<PORTB1);
i=1;
//init the ethernet/ip layer:
init_ip_arp_udp_tcp(mymac,myip,MYWWWPORT);
while(1){
// get the next new packet:
plen = enc28j60PacketReceive(BUFFER_SIZE, buf);
/*plen will ne unequal to zero if there is a valid
* packet (without crc error) */
if(plen==0){
continue;
}
// arp is broadcast if unknown but a host may also
// verify the mac address by sending it to
// a unicast address.
if(eth_type_is_arp_and_my_ip(buf,plen)){
make_arp_answer_from_request(buf);
continue;
}
// check if ip packets (icmp or udp) are for us:
if(eth_type_is_ip_and_my_ip(buf,plen)==0){
continue;
}
if (i){
/* set output to Vcc, LED off */
PORTB|= (1<<PORTB1);
i=0;
}else{
/* set output to GND, LED on */
PORTB &= ~(1<<PORTB1);
i=1;
}
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
// a ping packet, let's send pong
make_echo_reply_from_request(buf,plen);
continue;
}
// tcp port 80 start
if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==MYWWWPORT){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V){
make_tcp_synack_from_syn(buf);
// make_tcp_synack_from_syn does already send the syn,ack
continue;
}
if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V){
init_len_info(buf); // init some data structures
// we can possibly have no data, just ack:
dat_p=get_tcp_data_pointer();
if (dat_p==0){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V){
// finack, answer with ack
make_tcp_ack_from_any(buf);
}
// just an ack with no data, wait for next packet
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
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>"));
goto SENDTCP;
}
// any GET, any url:
plen=print_webpage(buf,enc28j60getrev());
SENDTCP:
make_tcp_ack_from_any(buf); // send ack for http get
make_tcp_ack_with_data(buf,plen); // send data
continue;
}
}
// tcp port 80 end
//
// udp start, we listen on udp port 1200=0x4B0
if (buf[IP_PROTO_P]==IP_PROTO_UDP_V&&buf[UDP_DST_PORT_H_P]==4&&buf[UDP_DST_PORT_L_P]==0xb0){
payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN;
// you must sent a string starting with v
// e.g udpcom version 10.0.0.24
if (buf[UDP_DATA_P]=='v' ){
str[0]='v';
str[1]='e';
str[2]='r';
str[3]='=';
str[4]='B';
itoa((enc28j60getrev()),&(str[5]),10);
make_udp_reply_from_request(buf,str,strnlen(str,10),MYUDPPORT);
}
}
}
return (0);
}
/*
* 函数名：Web_Server
* 描述 ：在浏览器上创建一个web服务器，通过web里面的命令来控制开发板上的LED的亮灭。
* 输入 ：无
* 输出 ：无
* 返回 ：-0 运行成功
* 应用 ：1 在PC机的DOS界面输入： ping 192.168.1.15 (看能否ping通)
* 2 在IE浏览器中输入：http://192.168.1.15/123456 则会出现一个网页，通过网页
* 中的命令可以控制开发板中的LED的亮灭
*/
int Web_Server(void)
{
unsigned int plen, i1 = 0;
unsigned int dat_p;
// unsigned char i = 0;
unsigned char cmd, *buf1;
unsigned int payloadlen = 0;
/* 初始化 enc28j60 的MAC地址(物理地址),这个函数必须要调用一次 */
enc28j60Init(mymac);
/* PHY LED 配置,LED用来指示通信的状态 */
enc28j60PhyWrite(PHLCON,0x476);
/* 将enc28j60第三引脚的时钟输出改为：from 6.25MHz to 12.5MHz(本例程该引脚NC,没用到) */
//enc28j60clkout(2);
/* 初始化以太网 IP 层 */
init_ip_arp_udp_tcp(mymac,myip,mywwwport);
printf("服务器初始化成功！\n");
while(1)
{
// get the next new packet:
plen = enc28j60PacketReceive(BUFFER_SIZE, buf);
// plen will ne unequal to zero if there is a valid packet (without crc error)
if(plen==0)
{
continue;
}
// arp is broadcast if unknown but a host may also
// verify the mac address by sending it to
// a unicast address.
if(eth_type_is_arp_and_my_ip(buf,plen))
{
make_arp_answer_from_request(buf);
continue;
}
// check if ip packets are for us:
if(eth_type_is_ip_and_my_ip(buf,plen)==0)
{
continue;
}
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V)
{
// a ping packet, let's send pong DOS 下的 ping 命令包
make_echo_reply_from_request(buf, plen);
continue;
}
/*-----------------tcp port www start, compare only the lower byte-----------------------------------*/
if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==mywwwport)
{
if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V)
{
make_tcp_synack_from_syn(buf);
// make_tcp_synack_from_syn does already send the syn,ack
continue;
}
if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V)
{
init_len_info(buf); // init some data structures
// we can possibly have no data, just ack:
dat_p=get_tcp_data_pointer();
if (dat_p==0)
{
if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V)
{
// finack, answer with ack
make_tcp_ack_from_any(buf);
}
// just an ack with no data, wait for next packet
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
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>"));
goto SENDTCP;
}
if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0)
{
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"));
plen=fill_tcp_data_p(buf,plen,PSTR("<p>Usage: "));
plen=fill_tcp_data(buf,plen,baseurl);
plen=fill_tcp_data_p(buf,plen,PSTR("password</p>"));
goto SENDTCP;
}
cmd=analyse_get_url((char *)&(buf[dat_p+5]));
// for possible status codes see:
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
if (cmd==1)
{
plen=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) // 用户程序
// {
// LED1(ON);
// i=1; // 命令 = 1
// }
// if (cmd==0) // 用户程序
// {
// LED1(OFF);
// i=0; // 命令 = 0
// }
// if (cmd==-2) or any other value
// just display the status:
plen=print_webpage(buf,1);
SENDTCP:
make_tcp_ack_from_any(buf); // send ack for http get
make_tcp_ack_with_data(buf,plen); // send data
continue;
}
}
/*-------------------------------------- tcp port www end ---------------------------------------*/
/*--------------------- udp start, we listen on udp port 1200=0x4B0 -----------------------------*/
if (buf[IP_PROTO_P]==IP_PROTO_UDP_V&&buf[UDP_DST_PORT_H_P]==4&&buf[UDP_DST_PORT_L_P]==0xb0)
{
payloadlen= buf[UDP_LEN_H_P];
payloadlen=payloadlen<<8;
payloadlen=(payloadlen+buf[UDP_LEN_L_P])-UDP_HEADER_LEN;
//payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN;
ANSWER:
//while(1){
for(i1=0; i1<payloadlen; i1++) buf1[i1]=buf[UDP_DATA_P+i1];
//make_udp_reply_from_request(buf,str,strlen(str),myudpport);
make_udp_reply_from_request(buf,buf1,payloadlen,myudpport);
//}
}
/*----------------------------------------udp end -----------------------------------------------*/
}
return (0);
}
void EtherShieldWrapper::ESW_make_tcp_synack_from_syn(uint8_t *buf){
make_tcp_synack_from_syn(buf);
}
int main(void){
uint16_t plen;
uint16_t dat_p;
uint8_t i=0;
uint8_t cmd_pos=0;
int8_t cmd;
uint8_t payloadlen=0;
char str[30];
char cmdval;
// 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.
CLKPR=(1<<CLKPCE); // change enable
CLKPR=0; // "no pre-scaler"
delay_ms(1);
/* enable PD2/INT0, as input */
DDRD&= ~(1<<DDD2);
/*initialize enc28j60*/
enc28j60Init(mymac);
enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
delay_ms(10);
// LED
/* enable PB1, LED as output */
DDRB|= (1<<DDB1);
/* set output to Vcc, LED off */
PORTB|= (1<<PB1);
// the transistor on PD7
DDRD|= (1<<DDD7);
PORTD &= ~(1<<PD7);// transistor off
/* 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(20);
/* set output to GND, red LED on */
PORTB &= ~(1<<PB1);
i=1;
//init the ethernet/ip layer:
init_ip_arp_udp_tcp(mymac,myip,MYWWWPORT);
while(1){
// get the next new packet:
plen = enc28j60PacketReceive(BUFFER_SIZE, buf);
/*plen will ne unequal to zero if there is a valid
* packet (without crc error) */
if(plen==0){
continue;
}
// arp is broadcast if unknown but a host may also
// verify the mac address by sending it to
// a unicast address.
if(eth_type_is_arp_and_my_ip(buf,plen)){
make_arp_answer_from_request(buf);
continue;
}
// check if ip packets are for us:
if(eth_type_is_ip_and_my_ip(buf,plen)==0){
continue;
}
// led----------
if (i){
/* set output to Vcc, LED off */
PORTB|= (1<<PB1);
i=0;
}else{
/* set output to GND, LED on */
PORTB &= ~(1<<PB1);
i=1;
}
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
// a ping packet, let's send pong
make_echo_reply_from_request(buf,plen);
continue;
}
// tcp port www start, compare only the lower byte
if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==MYWWWPORT){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V){
make_tcp_synack_from_syn(buf);
// make_tcp_synack_from_syn does already send the syn,ack
continue;
}
if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V){
init_len_info(buf); // init some data structures
// we can possibly have no data, just ack:
dat_p=get_tcp_data_pointer();
if (dat_p==0){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V){
// finack, answer with ack
make_tcp_ack_from_any(buf);
}
// just an ack with no data, wait for next packet
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
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>"));
goto SENDTCP;
}
if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0){
plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"));
plen=fill_tcp_data_p(buf,plen,PSTR("<p>Usage: http://host_or_ip/password</p>\n"));
goto SENDTCP;
}
cmd=analyse_get_url((char *)&(buf[dat_p+5]));
// for possible status codes see:
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
if (cmd==-1){
plen=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){
PORTD|= (1<<PD7);// transistor on
}
if (cmd==0){
PORTD &= ~(1<<PD7);// transistor off
}
if (cmd==-3){
// redirect to add a trailing slash
plen=moved_perm(buf);
goto SENDTCP;
}
// if (cmd==-2) or any other value
// just display the status:
plen=print_webpage(buf,(PORTD & (1<<PD7)));
//
SENDTCP:
make_tcp_ack_from_any(buf); // send ack for http get
make_tcp_ack_with_data(buf,plen); // send data
continue;
}
}
// tcp port www end
//
// udp start, we listen on udp port 1200=0x4B0
if (buf[IP_PROTO_P]==IP_PROTO_UDP_V&&buf[UDP_DST_PORT_H_P]==4&&buf[UDP_DST_PORT_L_P]==0xb0){
payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN;
// you must sent a string starting with v
// e.g udpcom version 10.0.0.24
if (verify_password((char *)&(buf[UDP_DATA_P]))){
// find the first comma which indicates
// the start of a command:
cmd_pos=0;
while(cmd_pos<payloadlen){
cmd_pos++;
if (buf[UDP_DATA_P+cmd_pos]==','){
cmd_pos++; // put on start of cmd
break;
}
}
// a command is one char and a value. At
// least 3 characters long. It has an '=' on
// position 2:
if (cmd_pos<2 || cmd_pos>payloadlen-3 || buf[UDP_DATA_P+cmd_pos+1]!='='){
strcpy(str,"e=no_cmd");
goto ANSWER;
}
// supported commands are
// t=1 t=0 t=?
if (buf[UDP_DATA_P+cmd_pos]=='t'){
cmdval=buf[UDP_DATA_P+cmd_pos+2];
if(cmdval=='1'){
PORTD|= (1<<PD7);// transistor on
strcpy(str,"t=1");
goto ANSWER;
}else if(cmdval=='0'){
PORTD &= ~(1<<PD7);// transistor off
strcpy(str,"t=0");
goto ANSWER;
}else if(cmdval=='?'){
if (PORTD & (1<<PD7)){
strcpy(str,"t=1");
goto ANSWER;
}
strcpy(str,"t=0");
goto ANSWER;
}
}
strcpy(str,"e=no_such_cmd");
goto ANSWER;
}
strcpy(str,"e=invalid_pw");
ANSWER:
make_udp_reply_from_request(buf,str,strlen(str),MYUDPPORT);
}
}
return (0);
}