Created
January 8, 2012 06:43
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Simple web server for Nanode v5 that also provides Wake-On-LAN broadcast on network segment in response to a HTTP request. This provides a route-able way to start a server on another network segment.
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| // Simple web server for Nanode v5 that also provides Wake-On-LAN broadcast on | |
| // network segment in response to a HTTP request. This provides a route-able | |
| // way to start a server on another network segment. | |
| // 2012-01-07 <[email protected]> http://opensource.org/licenses/mit-license.php | |
| #include <EtherCard.h> | |
| #include <NanodeUNIO.h> | |
| // ethernet mac address - must be unique on your network | |
| static byte mymac[6]; | |
| // ethernet mac address - to wake | |
| static byte wakemac[] = { 0x00,0x11,0x43,0xfd,0x68,0xc1 }; | |
| static BufferFiller bfill; // used as cursor while filling the buffer | |
| byte Ethernet::buffer[700]; // tcp/ip send and receive buffer | |
| // this buffer will be used to construct a collectd UDP packet | |
| static byte udpBuf [102]; | |
| char page[] PROGMEM = | |
| "<html>" | |
| "<head><title>" | |
| "Service Temporarily Unavailable" | |
| "</title></head>" | |
| "<body>" | |
| "<h3>This service is currently unavailable</h3>" | |
| "<p><em>" | |
| "The main server is currently off-line.<br />" | |
| "Please try again later." | |
| "</em></p>" | |
| "</body>" | |
| "</html>" | |
| ; | |
| void setup(){ | |
| NanodeUNIO unio(NANODE_MAC_DEVICE); | |
| if (!unio.read(mymac,NANODE_MAC_ADDRESS,6)) | |
| Serial.println("MAC failed"); | |
| ether.begin(sizeof Ethernet::buffer, mymac); | |
| ether.dhcpSetup(); | |
| } | |
| char okHeader[] PROGMEM = | |
| "HTTP/1.0 200 OK\r\n" | |
| "Content-Type: text/html\r\n" | |
| "Pragma: no-cache\r\n" | |
| ; | |
| static void homePage (BufferFiller& buf) { | |
| buf.emit_p(PSTR("$F\r\n$F"), okHeader, page); | |
| } | |
| static void wakeServer () { | |
| static byte destIp[] = { 255,255,255,255 }; // broadcast on local segment | |
| byte loc = 0; | |
| for (byte j = 0; j<6; j++, loc++) { | |
| udpBuf[loc] = 0xFF; | |
| } | |
| for (byte i = 0; i<16; i++) { | |
| for (byte j = 0; j<6; j++, loc++) { | |
| udpBuf[loc] = wakemac[j]; | |
| } | |
| } | |
| ether.sendUdp ((char*) udpBuf, 102, 23456, destIp, 7); | |
| } | |
| void loop(){ | |
| boolean wake=false; | |
| // DHCP expiration is a bit brutal, because all other ethernet activity and | |
| // incoming packets will be ignored until a new lease has been acquired | |
| if (ether.dhcpExpired()) | |
| ether.dhcpSetup(); | |
| // wait for an incoming TCP packet, but ignore its contents | |
| word len = ether.packetReceive(); | |
| word pos = ether.packetLoop(len); | |
| // check if valid tcp data is received | |
| if (pos) { | |
| bfill = ether.tcpOffset(); | |
| char* data = (char *) Ethernet::buffer + pos; | |
| // receive buf hasn't been clobbered by reply yet | |
| if (strncmp("GET / ", data, 6) == 0) | |
| homePage(bfill); | |
| else if (strncmp("GET /w", data, 6) == 0) { | |
| wake=true; | |
| bfill.emit_p(PSTR( | |
| "$F\r\n" | |
| "<h1>Woke Server</h1>"), okHeader); | |
| } else | |
| bfill.emit_p(PSTR( | |
| "HTTP/1.0 401 Unauthorized\r\n" | |
| "Content-Type: text/html\r\n" | |
| "\r\n" | |
| "<h1>401 Unauthorized</h1>")); | |
| ether.httpServerReply(bfill.position()); // send web page data | |
| if (wake) wakeServer(); | |
| } | |
| } |
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