main.cpp

00001 #include "lwip/opt.h"
00002 #include "lwip/stats.h"
00003 #include "lwip/sys.h"
00004 #include "lwip/pbuf.h"
00005 #include "lwip/udp.h"
00006 #include "lwip/tcp.h"
00007 #include "lwip/dns.h"
00008 #include "lwip/dhcp.h"
00009 #include "lwip/init.h"
00010 #include "lwip/netif.h"
00011 #include "netif/etharp.h"
00012 #include "netif/loopif.h"
00013 #include "device.h"
00014 
00015 #include "mbed.h"
00016 
00017 DigitalOut led(LED1);
00018 
00019 /* Struct with hold the Ethernet Data */
00020 struct netif    netif_data;
00021 
00022 /* Every time called if a packet is received for a */
00023 /* TCPConnection which registerd this Callback. */
00024 err_t recv_callback(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) {
00025     printf("recv_callback\n");
00026     if (p==NULL) {
00027         printf("Connection closed by server!\n");
00028         return ERR_OK;
00029     }
00030 
00031     while (p) {
00032         char * ch = (char*)p->payload;
00033         printf("\n>>>>>>>>>>>>\n");
00034         for (int i=0; i < p->len; i++) {
00035             printf("%c", ch[i]);
00036         }
00037         printf("\n<<<<<<<<<<<<\n");
00038         p = p->next;
00039     }
00040     tcp_recved(pcb, p->tot_len);
00041     pbuf_free(p);
00042     return ERR_OK;
00043 }
00044 
00045 /* Connection etablished, lets try to get a http page */
00046 err_t connected_callback(void *arg, struct tcp_pcb *pcb, err_t err) {
00047     tcp_recv(pcb, &recv_callback);
00048     printf("Connected Callback!\n");
00049     char msg[] = "GET / HTTP/1.1\r\nHost: www.google.co.uk\r\n\r\n";
00050     if (tcp_write(pcb, msg, strlen(msg), 1) != ERR_OK) {
00051         error("Could not write", 0);
00052     }
00053     return ERR_OK;
00054 }
00055 
00056 int main(void) {
00057     /* Create and initialise variables */
00058     struct netif   *netif = &netif_data;
00059     struct ip_addr  ipaddr;
00060     struct ip_addr  target;
00061     struct ip_addr  netmask;
00062     struct ip_addr  gateway;
00063 
00064     Ticker tickFast, tickSlow, tickARP, eth_tick, dns_tick, dhcp_coarse, dhcp_fine;
00065     char *hostname = "mbed-c3p0";
00066 
00067     /* Start Network with DHCP */
00068     IP4_ADDR(&netmask, 255,255,255,255);
00069     IP4_ADDR(&gateway, 0,0,0,0);
00070     IP4_ADDR(&ipaddr, 0,0,0,0);
00071     IP4_ADDR(&target, 209,85,229,147); // www.google.co.uk
00072 
00073     /* Initialise after configuration */
00074     lwip_init();
00075 
00076     netif->hwaddr_len = ETHARP_HWADDR_LEN;
00077     device_address((char *)netif->hwaddr);
00078 
00079     netif = netif_add(netif, &ipaddr, &netmask, &gateway, NULL, device_init, ip_input);
00080     netif->hostname = hostname;
00081     netif_set_default(netif);
00082     dhcp_start(netif); // <-- Use DHCP
00083 
00084     /* Initialise all needed timers */
00085     tickARP.attach_us( &etharp_tmr,  ARP_TMR_INTERVAL  * 1000);
00086     tickFast.attach_us(&tcp_fasttmr, TCP_FAST_INTERVAL * 1000);
00087     tickSlow.attach_us(&tcp_slowtmr, TCP_SLOW_INTERVAL * 1000);
00088     dns_tick.attach_us(&dns_tmr, DNS_TMR_INTERVAL * 1000);
00089     dhcp_coarse.attach_us(&dhcp_coarse_tmr, DHCP_COARSE_TIMER_MSECS * 1000);
00090     dhcp_fine.attach_us(&dhcp_fine_tmr, DHCP_FINE_TIMER_MSECS * 1000);
00091 
00092     // Wait for an IP Address
00093     while (!netif_is_up(netif)) {
00094         device_poll();
00095     }
00096 
00097     /* Connect do google */
00098     struct tcp_pcb *pcb = tcp_new();
00099     tcp_connect(pcb, &target, 80, &connected_callback);
00100 
00101     /* Give the signal that we are ready */
00102     printf("entering while loop\n");
00103     while (1) {
00104         led = !led;
00105         wait(0.1);
00106         device_poll();
00107     }
00108 }
00109