mbed unsupported / lwip

A version of LWIP, provided for backwards compatibility.

Dependents:   AA_DemoBoard DemoBoard HelloServerDemo DemoBoard_RangeIndicator ... more

examples/purehttpc/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 DigitalOut led(LED1);
root@mbed.org 0:5e1631496985 18
root@mbed.org 0:5e1631496985 19 /* Struct with hold the Ethernet Data */
root@mbed.org 0:5e1631496985 20 struct netif netif_data;
root@mbed.org 0:5e1631496985 21
root@mbed.org 0:5e1631496985 22 /* Every time called if a packet is received for a */
root@mbed.org 0:5e1631496985 23 /* TCPConnection which registerd this Callback. */
root@mbed.org 0:5e1631496985 24 err_t recv_callback(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) {
root@mbed.org 0:5e1631496985 25 printf("recv_callback\n");
root@mbed.org 0:5e1631496985 26 if (p==NULL) {
root@mbed.org 0:5e1631496985 27 printf("Connection closed by server!\n");
root@mbed.org 0:5e1631496985 28 return ERR_OK;
root@mbed.org 0:5e1631496985 29 }
root@mbed.org 0:5e1631496985 30
root@mbed.org 0:5e1631496985 31 while (p) {
root@mbed.org 0:5e1631496985 32 char * ch = (char*)p->payload;
root@mbed.org 0:5e1631496985 33 printf("\n>>>>>>>>>>>>\n");
root@mbed.org 0:5e1631496985 34 for (int i=0; i < p->len; i++) {
root@mbed.org 0:5e1631496985 35 printf("%c", ch[i]);
root@mbed.org 0:5e1631496985 36 }
root@mbed.org 0:5e1631496985 37 printf("\n<<<<<<<<<<<<\n");
root@mbed.org 0:5e1631496985 38 p = p->next;
root@mbed.org 0:5e1631496985 39 }
root@mbed.org 0:5e1631496985 40 tcp_recved(pcb, p->tot_len);
root@mbed.org 0:5e1631496985 41 pbuf_free(p);
root@mbed.org 0:5e1631496985 42 return ERR_OK;
root@mbed.org 0:5e1631496985 43 }
root@mbed.org 0:5e1631496985 44
root@mbed.org 0:5e1631496985 45 /* Connection etablished, lets try to get a http page */
root@mbed.org 0:5e1631496985 46 err_t connected_callback(void *arg, struct tcp_pcb *pcb, err_t err) {
root@mbed.org 0:5e1631496985 47 tcp_recv(pcb, &recv_callback);
root@mbed.org 0:5e1631496985 48 printf("Connected Callback!\n");
root@mbed.org 0:5e1631496985 49 char msg[] = "GET / HTTP/1.1\r\nHost: www.google.co.uk\r\n\r\n";
root@mbed.org 0:5e1631496985 50 if (tcp_write(pcb, msg, strlen(msg), 1) != ERR_OK) {
root@mbed.org 0:5e1631496985 51 error("Could not write", 0);
root@mbed.org 0:5e1631496985 52 }
root@mbed.org 0:5e1631496985 53 return ERR_OK;
root@mbed.org 0:5e1631496985 54 }
root@mbed.org 0:5e1631496985 55
root@mbed.org 0:5e1631496985 56 int main(void) {
root@mbed.org 0:5e1631496985 57 /* Create and initialise variables */
root@mbed.org 0:5e1631496985 58 struct netif *netif = &netif_data;
root@mbed.org 0:5e1631496985 59 struct ip_addr ipaddr;
root@mbed.org 0:5e1631496985 60 struct ip_addr target;
root@mbed.org 0:5e1631496985 61 struct ip_addr netmask;
root@mbed.org 0:5e1631496985 62 struct ip_addr gateway;
root@mbed.org 0:5e1631496985 63
root@mbed.org 0:5e1631496985 64 Ticker tickFast, tickSlow, tickARP, eth_tick, dns_tick, dhcp_coarse, dhcp_fine;
root@mbed.org 0:5e1631496985 65 char *hostname = "mbed-c3p0";
root@mbed.org 0:5e1631496985 66
root@mbed.org 0:5e1631496985 67 /* Start Network with DHCP */
root@mbed.org 0:5e1631496985 68 IP4_ADDR(&netmask, 255,255,255,255);
root@mbed.org 0:5e1631496985 69 IP4_ADDR(&gateway, 0,0,0,0);
root@mbed.org 0:5e1631496985 70 IP4_ADDR(&ipaddr, 0,0,0,0);
root@mbed.org 0:5e1631496985 71 IP4_ADDR(&target, 209,85,229,147); // www.google.co.uk
root@mbed.org 0:5e1631496985 72
root@mbed.org 0:5e1631496985 73 /* Initialise after configuration */
root@mbed.org 0:5e1631496985 74 lwip_init();
root@mbed.org 0:5e1631496985 75
root@mbed.org 0:5e1631496985 76 netif->hwaddr_len = ETHARP_HWADDR_LEN;
root@mbed.org 0:5e1631496985 77 device_address((char *)netif->hwaddr);
root@mbed.org 0:5e1631496985 78
root@mbed.org 0:5e1631496985 79 netif = netif_add(netif, &ipaddr, &netmask, &gateway, NULL, device_init, ip_input);
root@mbed.org 0:5e1631496985 80 netif->hostname = hostname;
root@mbed.org 0:5e1631496985 81 netif_set_default(netif);
root@mbed.org 0:5e1631496985 82 dhcp_start(netif); // <-- Use DHCP
root@mbed.org 0:5e1631496985 83
root@mbed.org 0:5e1631496985 84 /* Initialise all needed timers */
root@mbed.org 0:5e1631496985 85 tickARP.attach_us( &etharp_tmr, ARP_TMR_INTERVAL * 1000);
root@mbed.org 0:5e1631496985 86 tickFast.attach_us(&tcp_fasttmr, TCP_FAST_INTERVAL * 1000);
root@mbed.org 0:5e1631496985 87 tickSlow.attach_us(&tcp_slowtmr, TCP_SLOW_INTERVAL * 1000);
root@mbed.org 0:5e1631496985 88 dns_tick.attach_us(&dns_tmr, DNS_TMR_INTERVAL * 1000);
root@mbed.org 0:5e1631496985 89 dhcp_coarse.attach_us(&dhcp_coarse_tmr, DHCP_COARSE_TIMER_MSECS * 1000);
root@mbed.org 0:5e1631496985 90 dhcp_fine.attach_us(&dhcp_fine_tmr, DHCP_FINE_TIMER_MSECS * 1000);
root@mbed.org 0:5e1631496985 91
root@mbed.org 0:5e1631496985 92 // Wait for an IP Address
root@mbed.org 0:5e1631496985 93 while (!netif_is_up(netif)) {
root@mbed.org 0:5e1631496985 94 device_poll();
root@mbed.org 0:5e1631496985 95 }
root@mbed.org 0:5e1631496985 96
root@mbed.org 0:5e1631496985 97 /* Connect do google */
root@mbed.org 0:5e1631496985 98 struct tcp_pcb *pcb = tcp_new();
root@mbed.org 0:5e1631496985 99 tcp_connect(pcb, &target, 80, &connected_callback);
root@mbed.org 0:5e1631496985 100
root@mbed.org 0:5e1631496985 101 /* Give the signal that we are ready */
root@mbed.org 0:5e1631496985 102 printf("entering while loop\n");
root@mbed.org 0:5e1631496985 103 while (1) {
root@mbed.org 0:5e1631496985 104 led = !led;
root@mbed.org 0:5e1631496985 105 wait(0.1);
root@mbed.org 0:5e1631496985 106 device_poll();
root@mbed.org 0:5e1631496985 107 }
root@mbed.org 0:5e1631496985 108 }
root@mbed.org 0:5e1631496985 109