Joe Danlloh / lwip

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Dependencies:   mbed

Fork of lwip by mbed unsupported

examples/purehttpd/main.cpp@0:5e1631496985, 2012-05-08 (annotated)

Committer:
root@mbed.org
Date:
Tue May 08 15:32:10 2012 +0100
Revision:
0:5e1631496985
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
root@mbed.org 0:5e1631496985 1 #include "lwip/opt.h"
root@mbed.org 0:5e1631496985 2 #include "lwip/stats.h"
root@mbed.org 0:5e1631496985 3 #include "lwip/sys.h"
root@mbed.org 0:5e1631496985 4 #include "lwip/pbuf.h"
root@mbed.org 0:5e1631496985 5 #include "lwip/udp.h"
root@mbed.org 0:5e1631496985 6 #include "lwip/tcp.h"
root@mbed.org 0:5e1631496985 7 #include "lwip/dns.h"
root@mbed.org 0:5e1631496985 8 #include "lwip/dhcp.h"
root@mbed.org 0:5e1631496985 9 #include "lwip/init.h"
root@mbed.org 0:5e1631496985 10 #include "lwip/netif.h"
root@mbed.org 0:5e1631496985 11 #include "netif/etharp.h"
root@mbed.org 0:5e1631496985 12 #include "netif/loopif.h"
root@mbed.org 0:5e1631496985 13 #include "device.h"
root@mbed.org 0:5e1631496985 14
root@mbed.org 0:5e1631496985 15 #include "mbed.h"
root@mbed.org 0:5e1631496985 16
root@mbed.org 0:5e1631496985 17 /* Some Lights */
root@mbed.org 0:5e1631496985 18 DigitalOut led1(LED1);
root@mbed.org 0:5e1631496985 19 DigitalOut led2(LED2);
root@mbed.org 0:5e1631496985 20 int x = 0;
root@mbed.org 0:5e1631496985 21
root@mbed.org 0:5e1631496985 22 /* Struct with hold the Ethernet Data */
root@mbed.org 0:5e1631496985 23 struct netif netif_data;
root@mbed.org 0:5e1631496985 24
root@mbed.org 0:5e1631496985 25 /* Two static html pages ready for serving, includeing http header */
root@mbed.org 0:5e1631496985 26 const char *page[] = {
root@mbed.org 0:5e1631496985 27 "HTTP/1.1 200 OK\r\n"
root@mbed.org 0:5e1631496985 28 "Server:mbed embedded\r\n"
root@mbed.org 0:5e1631496985 29 "Content-Type: text/html\r\n"
root@mbed.org 0:5e1631496985 30 "Content-Length: 190\r\n"
root@mbed.org 0:5e1631496985 31 "\r\n"
root@mbed.org 0:5e1631496985 32 "<html>\r\n"
root@mbed.org 0:5e1631496985 33 " <header>\r\n"
root@mbed.org 0:5e1631496985 34 " <title>Whats up?<title>\r\n"
root@mbed.org 0:5e1631496985 35 " </header>\r\n"
root@mbed.org 0:5e1631496985 36 " <body>\r\n"
root@mbed.org 0:5e1631496985 37 " <h1>Hello World!!11elf</h1>\r\n"
root@mbed.org 0:5e1631496985 38 " <p>Have a greate day.</p>\r\n"
root@mbed.org 0:5e1631496985 39 " <a href=\"/1.html\">turn </a>\r\n"
root@mbed.org 0:5e1631496985 40 " </body>\r\n"
root@mbed.org 0:5e1631496985 41 "</html>\r\n"
root@mbed.org 0:5e1631496985 42 "\r\n"
root@mbed.org 0:5e1631496985 43 ,
root@mbed.org 0:5e1631496985 44 "HTTP/1.1 200 OK\r\n"
root@mbed.org 0:5e1631496985 45 "Server:mbed embedded\r\n"
root@mbed.org 0:5e1631496985 46 "Content-Type: text/html\r\n"
root@mbed.org 0:5e1631496985 47 "Content-Length: 178\r\n"
root@mbed.org 0:5e1631496985 48 "\r\n"
root@mbed.org 0:5e1631496985 49 "<html>\r\n"
root@mbed.org 0:5e1631496985 50 " <header>\r\n"
root@mbed.org 0:5e1631496985 51 " <title>LED Power<title>\r\n"
root@mbed.org 0:5e1631496985 52 " </header>\r\n"
root@mbed.org 0:5e1631496985 53 " <body>\r\n"
root@mbed.org 0:5e1631496985 54 " <h1>Lets rotate!!11elf</h1>\r\n"
root@mbed.org 0:5e1631496985 55 " <p>Bam!!!!!!!!!!.</p>\r\n"
root@mbed.org 0:5e1631496985 56 " <a href=\"/\">back</a>\r\n"
root@mbed.org 0:5e1631496985 57 " </body>\r\n"
root@mbed.org 0:5e1631496985 58 "</html>\r\n"
root@mbed.org 0:5e1631496985 59 "\r\n"
root@mbed.org 0:5e1631496985 60 };
root@mbed.org 0:5e1631496985 61
root@mbed.org 0:5e1631496985 62 /* Every time called if a packet is received for a */
root@mbed.org 0:5e1631496985 63 /* TCPConnection which registerd this Callback. */
root@mbed.org 0:5e1631496985 64 err_t recv_callback(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) {
root@mbed.org 0:5e1631496985 65 int i;
root@mbed.org 0:5e1631496985 66 char *data;
root@mbed.org 0:5e1631496985 67
root@mbed.org 0:5e1631496985 68 /* Check if status is ok and data is arrived. */
root@mbed.org 0:5e1631496985 69 if (err == ERR_OK && p != NULL) {
root@mbed.org 0:5e1631496985 70 /* Inform TCP that we have taken the data. */
root@mbed.org 0:5e1631496985 71 tcp_recved(pcb, p->tot_len);
root@mbed.org 0:5e1631496985 72 data = static_cast<char *>(p->payload);
root@mbed.org 0:5e1631496985 73
root@mbed.org 0:5e1631496985 74 /* If the data is a GET request we can handle it. */
root@mbed.org 0:5e1631496985 75 if (strncmp(data, "GET ", 4) == 0) {
root@mbed.org 0:5e1631496985 76 for (i = 0; i < 40; i++) {
root@mbed.org 0:5e1631496985 77 if (((char *)data + 4)[i] == ' ' ||
root@mbed.org 0:5e1631496985 78 ((char *)data + 4)[i] == '\r' ||
root@mbed.org 0:5e1631496985 79 ((char *)data + 4)[i] == '\n') {
root@mbed.org 0:5e1631496985 80 ((char *)data + 4)[i] = 0;
root@mbed.org 0:5e1631496985 81 }
root@mbed.org 0:5e1631496985 82 }
root@mbed.org 0:5e1631496985 83
root@mbed.org 0:5e1631496985 84 /* Check the URL */
root@mbed.org 0:5e1631496985 85 /* We only know two URLs /1.html and default */
root@mbed.org 0:5e1631496985 86 /* store the URL information in our global x variable to change twinkle behaviour. */
root@mbed.org 0:5e1631496985 87 x = (strncmp((char *)(data + 4), "/1.html", 7) == 0)? 1: 0;
root@mbed.org 0:5e1631496985 88 /* Clean up the Memory */
root@mbed.org 0:5e1631496985 89 pbuf_free(p);
root@mbed.org 0:5e1631496985 90
root@mbed.org 0:5e1631496985 91 /* Send the right page as answere. */
root@mbed.org 0:5e1631496985 92 if (tcp_write(pcb, (void *)page[x], strlen(page[x]), 1) != ERR_OK) {
root@mbed.org 0:5e1631496985 93 //error("Could not write", 0);
root@mbed.org 0:5e1631496985 94 }
root@mbed.org 0:5e1631496985 95 } else {
root@mbed.org 0:5e1631496985 96 /* No data arrived */
root@mbed.org 0:5e1631496985 97 /* That means the client closes the connection and sent us a packet with FIN flag set to 1. */
root@mbed.org 0:5e1631496985 98 /* We have to cleanup and destroy out TCPConnection. */
root@mbed.org 0:5e1631496985 99 pbuf_free(p);
root@mbed.org 0:5e1631496985 100 }
root@mbed.org 0:5e1631496985 101 }
root@mbed.org 0:5e1631496985 102
root@mbed.org 0:5e1631496985 103 /* Don't panic! Everything is fine. */
root@mbed.org 0:5e1631496985 104 return ERR_OK;
root@mbed.org 0:5e1631496985 105 }
root@mbed.org 0:5e1631496985 106
root@mbed.org 0:5e1631496985 107 /* Accept an incomming call on the registered port */
root@mbed.org 0:5e1631496985 108 err_t accept_callback(void *arg, struct tcp_pcb *npcb, err_t err) {
root@mbed.org 0:5e1631496985 109 LWIP_UNUSED_ARG(arg);
root@mbed.org 0:5e1631496985 110 /* Subscribe a receive callback function */
root@mbed.org 0:5e1631496985 111 tcp_recv(npcb, &recv_callback);
root@mbed.org 0:5e1631496985 112
root@mbed.org 0:5e1631496985 113 /* Don't panic! Everything is fine. */
root@mbed.org 0:5e1631496985 114 return ERR_OK;
root@mbed.org 0:5e1631496985 115 }
root@mbed.org 0:5e1631496985 116
root@mbed.org 0:5e1631496985 117 int main(void) {
root@mbed.org 0:5e1631496985 118 /* Create and initialise variables */
root@mbed.org 0:5e1631496985 119 struct netif *netif = &netif_data;
root@mbed.org 0:5e1631496985 120 struct ip_addr ipaddr;
root@mbed.org 0:5e1631496985 121 struct ip_addr netmask;
root@mbed.org 0:5e1631496985 122 struct ip_addr gateway;
root@mbed.org 0:5e1631496985 123
root@mbed.org 0:5e1631496985 124 Ticker tickFast, tickSlow, tickARP, eth_tick, dns_tick, dhcp_coarse, dhcp_fine;
root@mbed.org 0:5e1631496985 125 char *hostname = "mbed-c3p0";
root@mbed.org 0:5e1631496985 126 x = 0;
root@mbed.org 0:5e1631496985 127
root@mbed.org 0:5e1631496985 128 /* Start Network with DHCP */
root@mbed.org 0:5e1631496985 129 IP4_ADDR(&netmask, 255,255,255,255);
root@mbed.org 0:5e1631496985 130 IP4_ADDR(&gateway, 0,0,0,0);
root@mbed.org 0:5e1631496985 131 IP4_ADDR(&ipaddr, 0,0,0,0);
root@mbed.org 0:5e1631496985 132
root@mbed.org 0:5e1631496985 133 /* Initialise after configuration */
root@mbed.org 0:5e1631496985 134 lwip_init();
root@mbed.org 0:5e1631496985 135
root@mbed.org 0:5e1631496985 136 netif->hwaddr_len = ETHARP_HWADDR_LEN;
root@mbed.org 0:5e1631496985 137 device_address((char *)netif->hwaddr);
root@mbed.org 0:5e1631496985 138
root@mbed.org 0:5e1631496985 139 netif = netif_add(netif, &ipaddr, &netmask, &gateway, NULL, device_init, ip_input);
root@mbed.org 0:5e1631496985 140 netif->hostname = hostname;
root@mbed.org 0:5e1631496985 141 netif_set_default(netif);
root@mbed.org 0:5e1631496985 142 dhcp_start(netif); // <-- Use DHCP
root@mbed.org 0:5e1631496985 143
root@mbed.org 0:5e1631496985 144 /* Initialise all needed timers */
root@mbed.org 0:5e1631496985 145 tickARP.attach_us( &etharp_tmr, ARP_TMR_INTERVAL * 1000);
root@mbed.org 0:5e1631496985 146 tickFast.attach_us(&tcp_fasttmr, TCP_FAST_INTERVAL * 1000);
root@mbed.org 0:5e1631496985 147 tickSlow.attach_us(&tcp_slowtmr, TCP_SLOW_INTERVAL * 1000);
root@mbed.org 0:5e1631496985 148 dns_tick.attach_us(&dns_tmr, DNS_TMR_INTERVAL * 1000);
root@mbed.org 0:5e1631496985 149 dhcp_coarse.attach_us(&dhcp_coarse_tmr, DHCP_COARSE_TIMER_MSECS * 1000);
root@mbed.org 0:5e1631496985 150 dhcp_fine.attach_us(&dhcp_fine_tmr, DHCP_FINE_TIMER_MSECS * 1000);
root@mbed.org 0:5e1631496985 151
root@mbed.org 0:5e1631496985 152 /* Bind a function to a tcp port */
root@mbed.org 0:5e1631496985 153 struct tcp_pcb *pcb = tcp_new();
root@mbed.org 0:5e1631496985 154 if (tcp_bind(pcb, IP_ADDR_ANY, 80) == ERR_OK) {
root@mbed.org 0:5e1631496985 155 pcb = tcp_listen(pcb);
root@mbed.org 0:5e1631496985 156 tcp_accept(pcb, &accept_callback);
root@mbed.org 0:5e1631496985 157 }
root@mbed.org 0:5e1631496985 158
root@mbed.org 0:5e1631496985 159 /* Give the signal that we are ready */
root@mbed.org 0:5e1631496985 160 printf("entering while loop\n");
root@mbed.org 0:5e1631496985 161 while(1) {
root@mbed.org 0:5e1631496985 162 device_poll();
root@mbed.org 0:5e1631496985 163 if (x) {
root@mbed.org 0:5e1631496985 164 led1 = !led1;
root@mbed.org 0:5e1631496985 165 wait(0.2);
root@mbed.org 0:5e1631496985 166 } else {
root@mbed.org 0:5e1631496985 167 led2 = !led2;
root@mbed.org 0:5e1631496985 168 wait(0.2);
root@mbed.org 0:5e1631496985 169 }
root@mbed.org 0:5e1631496985 170 }
root@mbed.org 0:5e1631496985 171 }
root@mbed.org 0:5e1631496985 172