RawLwip - LWIP HTTP Client without any C++ wrapper. The pu…

Users » paleskyjp » Code » RawLwip

Yuji Hosogaya / Mbed 2 deprecated RawLwip

LWIP HTTP Client without any C++ wrapper. The purpose of this program is to compile the original program shown in the site below. http://mbed.org/projects/cookbook/wiki/EMAC/purehttpc Actually, the original one cannot be compiled without errors. So I modified to complete compiling.

Dependencies: mbed lwip

main.cpp@0:d3c85ea81493, 2012-03-03 (annotated)

Committer:: paleskyjp
Date:: Sat Mar 03 23:57:55 2012 +0000
Revision:: 0:d3c85ea81493

Who changed what in which revision?

User	Revision	Line number	New contents of line
paleskyjp	0:d3c85ea81493	1	#include "lwip/opt.h"
paleskyjp	0:d3c85ea81493	2	#include "lwip/stats.h"
paleskyjp	0:d3c85ea81493	3	#include "lwip/sys.h"
paleskyjp	0:d3c85ea81493	4	#include "lwip/pbuf.h"
paleskyjp	0:d3c85ea81493	5	#include "lwip/udp.h"
paleskyjp	0:d3c85ea81493	6	#include "lwip/tcp.h"
paleskyjp	0:d3c85ea81493	7	#include "lwip/dns.h"
paleskyjp	0:d3c85ea81493	8	#include "lwip/dhcp.h"
paleskyjp	0:d3c85ea81493	9	#include "lwip/init.h"
paleskyjp	0:d3c85ea81493	10	#include "lwip/netif.h"
paleskyjp	0:d3c85ea81493	11	#include "netif/etharp.h"
paleskyjp	0:d3c85ea81493	12	#include "netif/loopif.h"
paleskyjp	0:d3c85ea81493	13	#include "device.h"
paleskyjp	0:d3c85ea81493	14
paleskyjp	0:d3c85ea81493	15	#include "mbed.h"
paleskyjp	0:d3c85ea81493	16
paleskyjp	0:d3c85ea81493	17
paleskyjp	0:d3c85ea81493	18	// ----------------------------------------------------------------------------
paleskyjp	0:d3c85ea81493	19	// This part is added in order to complete compiling without errors.
paleskyjp	0:d3c85ea81493	20	// ----------------------------------------------------------------------------
paleskyjp	0:d3c85ea81493	21	#include "string.h"
paleskyjp	0:d3c85ea81493	22
paleskyjp	0:d3c85ea81493	23	#define IFNAME0 'E'
paleskyjp	0:d3c85ea81493	24	#define IFNAME1 'X'
paleskyjp	0:d3c85ea81493	25
paleskyjp	0:d3c85ea81493	26	#define min(x,y) (((x)<(y))?(x):(y))
paleskyjp	0:d3c85ea81493	27
paleskyjp	0:d3c85ea81493	28	extern Ethernet *eth;
paleskyjp	0:d3c85ea81493	29	extern struct netif *gnetif;
paleskyjp	0:d3c85ea81493	30
paleskyjp	0:d3c85ea81493	31	static err_t device_output(struct netif netif, struct pbuf p) {
paleskyjp	0:d3c85ea81493	32	#if ETH_PAD_SIZE
paleskyjp	0:d3c85ea81493	33	pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
paleskyjp	0:d3c85ea81493	34	#endif
paleskyjp	0:d3c85ea81493	35
paleskyjp	0:d3c85ea81493	36	do {
paleskyjp	0:d3c85ea81493	37	eth->write((const char *)p->payload, p->len);
paleskyjp	0:d3c85ea81493	38	} while((p = p->next)!=NULL);
paleskyjp	0:d3c85ea81493	39
paleskyjp	0:d3c85ea81493	40	eth->send();
paleskyjp	0:d3c85ea81493	41
paleskyjp	0:d3c85ea81493	42	#if ETH_PAD_SIZE
paleskyjp	0:d3c85ea81493	43	pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
paleskyjp	0:d3c85ea81493	44	#endif
paleskyjp	0:d3c85ea81493	45
paleskyjp	0:d3c85ea81493	46	LINK_STATS_INC(link.xmit);
paleskyjp	0:d3c85ea81493	47	return ERR_OK;
paleskyjp	0:d3c85ea81493	48	}
paleskyjp	0:d3c85ea81493	49
paleskyjp	0:d3c85ea81493	50	void device_poll() {
paleskyjp	0:d3c85ea81493	51	struct eth_hdr *ethhdr;
paleskyjp	0:d3c85ea81493	52	struct pbuf frame, p;
paleskyjp	0:d3c85ea81493	53	int len, read;
paleskyjp	0:d3c85ea81493	54
paleskyjp	0:d3c85ea81493	55	while((len = eth->receive()) != 0) {
paleskyjp	0:d3c85ea81493	56	frame = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
paleskyjp	0:d3c85ea81493	57	if(frame == NULL) {
paleskyjp	0:d3c85ea81493	58	return;
paleskyjp	0:d3c85ea81493	59	}
paleskyjp	0:d3c85ea81493	60	p = frame;
paleskyjp	0:d3c85ea81493	61	do {
paleskyjp	0:d3c85ea81493	62	read = eth->read((char *)p->payload, p->len);
paleskyjp	0:d3c85ea81493	63	p = p->next;
paleskyjp	0:d3c85ea81493	64	} while(p != NULL && read != 0);
paleskyjp	0:d3c85ea81493	65
paleskyjp	0:d3c85ea81493	66	#if ETH_PAD_SIZE
paleskyjp	0:d3c85ea81493	67	pbuf_header(p, ETH_PAD_SIZE);
paleskyjp	0:d3c85ea81493	68	#endif
paleskyjp	0:d3c85ea81493	69
paleskyjp	0:d3c85ea81493	70	ethhdr = (struct eth_hdr *)(frame->payload);
paleskyjp	0:d3c85ea81493	71
paleskyjp	0:d3c85ea81493	72	switch(htons(ethhdr->type)) {
paleskyjp	0:d3c85ea81493	73
paleskyjp	0:d3c85ea81493	74	case ETHTYPE_IP:
paleskyjp	0:d3c85ea81493	75	etharp_ip_input(gnetif, frame);
paleskyjp	0:d3c85ea81493	76	pbuf_header(frame, -((s16_t) sizeof(struct eth_hdr)));
paleskyjp	0:d3c85ea81493	77	gnetif->input(frame, gnetif);
paleskyjp	0:d3c85ea81493	78	break;
paleskyjp	0:d3c85ea81493	79
paleskyjp	0:d3c85ea81493	80	case ETHTYPE_ARP:
paleskyjp	0:d3c85ea81493	81	etharp_arp_input(gnetif, (struct eth_addr *)(gnetif->hwaddr), frame);
paleskyjp	0:d3c85ea81493	82	break;
paleskyjp	0:d3c85ea81493	83
paleskyjp	0:d3c85ea81493	84	default:
paleskyjp	0:d3c85ea81493	85	break;
paleskyjp	0:d3c85ea81493	86	}
paleskyjp	0:d3c85ea81493	87	pbuf_free(frame);
paleskyjp	0:d3c85ea81493	88	}
paleskyjp	0:d3c85ea81493	89	}
paleskyjp	0:d3c85ea81493	90
paleskyjp	0:d3c85ea81493	91	err_t device_init(struct netif *netif) {
paleskyjp	0:d3c85ea81493	92	LWIP_ASSERT("netif != NULL", (netif != NULL));
paleskyjp	0:d3c85ea81493	93
paleskyjp	0:d3c85ea81493	94	NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 0x2EA);
paleskyjp	0:d3c85ea81493	95
paleskyjp	0:d3c85ea81493	96	/* maximum transfer unit */
paleskyjp	0:d3c85ea81493	97	netif->mtu = 0x2EA;
paleskyjp	0:d3c85ea81493	98
paleskyjp	0:d3c85ea81493	99	/* device capabilities */
paleskyjp	0:d3c85ea81493	100	/* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
paleskyjp	0:d3c85ea81493	101	netif->flags = NETIF_FLAG_BROADCAST \| NETIF_FLAG_ETHARP \| NETIF_FLAG_LINK_UP;
paleskyjp	0:d3c85ea81493	102
paleskyjp	0:d3c85ea81493	103	netif->state = NULL;
paleskyjp	0:d3c85ea81493	104	gnetif = netif;
paleskyjp	0:d3c85ea81493	105
paleskyjp	0:d3c85ea81493	106	netif->name[0] = IFNAME0;
paleskyjp	0:d3c85ea81493	107	netif->name[1] = IFNAME1;
paleskyjp	0:d3c85ea81493	108
paleskyjp	0:d3c85ea81493	109	/* We directly use etharp_output() here to save a function call.
paleskyjp	0:d3c85ea81493	110	* You can instead declare your own function an call etharp_output()
paleskyjp	0:d3c85ea81493	111	* from it if you have to do some checks before sending (e.g. if link
paleskyjp	0:d3c85ea81493	112	* is available...) */
paleskyjp	0:d3c85ea81493	113	netif->output = etharp_output;
paleskyjp	0:d3c85ea81493	114	netif->linkoutput = device_output;
paleskyjp	0:d3c85ea81493	115
paleskyjp	0:d3c85ea81493	116	eth = new Ethernet();
paleskyjp	0:d3c85ea81493	117
paleskyjp	0:d3c85ea81493	118	return ERR_OK;
paleskyjp	0:d3c85ea81493	119	}
paleskyjp	0:d3c85ea81493	120
paleskyjp	0:d3c85ea81493	121	void device_address(char *mac) {
paleskyjp	0:d3c85ea81493	122	eth->address(mac);
paleskyjp	0:d3c85ea81493	123	}
paleskyjp	0:d3c85ea81493	124
paleskyjp	0:d3c85ea81493	125	// ----------------------------------------------------------------------------
paleskyjp	0:d3c85ea81493	126	// The end of the part added.
paleskyjp	0:d3c85ea81493	127	// ----------------------------------------------------------------------------
paleskyjp	0:d3c85ea81493	128
paleskyjp	0:d3c85ea81493	129
paleskyjp	0:d3c85ea81493	130	DigitalOut led(LED1);
paleskyjp	0:d3c85ea81493	131
paleskyjp	0:d3c85ea81493	132	/* Struct with hold the Ethernet Data */
paleskyjp	0:d3c85ea81493	133	struct netif netif_data;
paleskyjp	0:d3c85ea81493	134
paleskyjp	0:d3c85ea81493	135	/* Every time called if a packet is received for a */
paleskyjp	0:d3c85ea81493	136	/* TCPConnection which registerd this Callback. */
paleskyjp	0:d3c85ea81493	137	err_t recv_callback(void arg, struct tcp_pcb pcb, struct pbuf *p, err_t err) {
paleskyjp	0:d3c85ea81493	138	printf("recv_callback\n");
paleskyjp	0:d3c85ea81493	139	if (p==NULL) {
paleskyjp	0:d3c85ea81493	140	printf("Connection closed by server!\n");
paleskyjp	0:d3c85ea81493	141	return ERR_OK;
paleskyjp	0:d3c85ea81493	142	}
paleskyjp	0:d3c85ea81493	143
paleskyjp	0:d3c85ea81493	144	while (p) {
paleskyjp	0:d3c85ea81493	145	char * ch = (char*)p->payload;
paleskyjp	0:d3c85ea81493	146	printf("\n>>>>>>>>>>>>\n");
paleskyjp	0:d3c85ea81493	147	for (int i=0; i < p->len; i++) {
paleskyjp	0:d3c85ea81493	148	printf("%c", ch[i]);
paleskyjp	0:d3c85ea81493	149	}
paleskyjp	0:d3c85ea81493	150	printf("\n<<<<<<<<<<<<\n");
paleskyjp	0:d3c85ea81493	151	p = p->next;
paleskyjp	0:d3c85ea81493	152	}
paleskyjp	0:d3c85ea81493	153	tcp_recved(pcb, p->tot_len);
paleskyjp	0:d3c85ea81493	154	pbuf_free(p);
paleskyjp	0:d3c85ea81493	155	return ERR_OK;
paleskyjp	0:d3c85ea81493	156	}
paleskyjp	0:d3c85ea81493	157
paleskyjp	0:d3c85ea81493	158	/* Connection etablished, lets try to get a http page */
paleskyjp	0:d3c85ea81493	159	err_t connected_callback(void arg, struct tcp_pcb pcb, err_t err) {
paleskyjp	0:d3c85ea81493	160	tcp_recv(pcb, &recv_callback);
paleskyjp	0:d3c85ea81493	161	printf("Connected Callback!\n");
paleskyjp	0:d3c85ea81493	162	char msg[] = "GET / HTTP/1.1\r\nHost: www.google.co.uk\r\n\r\n";
paleskyjp	0:d3c85ea81493	163	if (tcp_write(pcb, msg, strlen(msg), 1) != ERR_OK) {
paleskyjp	0:d3c85ea81493	164	error("Could not write", 0);
paleskyjp	0:d3c85ea81493	165	}
paleskyjp	0:d3c85ea81493	166	return ERR_OK;
paleskyjp	0:d3c85ea81493	167	}
paleskyjp	0:d3c85ea81493	168
paleskyjp	0:d3c85ea81493	169	int main(void) {
paleskyjp	0:d3c85ea81493	170	/* Create and initialise variables */
paleskyjp	0:d3c85ea81493	171	struct netif *netif = &netif_data;
paleskyjp	0:d3c85ea81493	172	struct ip_addr ipaddr;
paleskyjp	0:d3c85ea81493	173	struct ip_addr target;
paleskyjp	0:d3c85ea81493	174	struct ip_addr netmask;
paleskyjp	0:d3c85ea81493	175	struct ip_addr gateway;
paleskyjp	0:d3c85ea81493	176
paleskyjp	0:d3c85ea81493	177	Ticker tickFast, tickSlow, tickARP, eth_tick, dns_tick, dhcp_coarse, dhcp_fine;
paleskyjp	0:d3c85ea81493	178	char *hostname = "mbed-c3p0";
paleskyjp	0:d3c85ea81493	179
paleskyjp	0:d3c85ea81493	180	/* Start Network with DHCP */
paleskyjp	0:d3c85ea81493	181	IP4_ADDR(&netmask, 255,255,255,255);
paleskyjp	0:d3c85ea81493	182	IP4_ADDR(&gateway, 0,0,0,0);
paleskyjp	0:d3c85ea81493	183	IP4_ADDR(&ipaddr, 0,0,0,0);
paleskyjp	0:d3c85ea81493	184	IP4_ADDR(&target, 209,85,229,147); // www.google.co.uk
paleskyjp	0:d3c85ea81493	185
paleskyjp	0:d3c85ea81493	186	/* Initialise after configuration */
paleskyjp	0:d3c85ea81493	187	lwip_init();
paleskyjp	0:d3c85ea81493	188
paleskyjp	0:d3c85ea81493	189	netif->hwaddr_len = ETHARP_HWADDR_LEN;
paleskyjp	0:d3c85ea81493	190	device_address((char *)netif->hwaddr);
paleskyjp	0:d3c85ea81493	191
paleskyjp	0:d3c85ea81493	192	netif = netif_add(netif, &ipaddr, &netmask, &gateway, NULL, device_init, ip_input);
paleskyjp	0:d3c85ea81493	193	netif->hostname = hostname;
paleskyjp	0:d3c85ea81493	194	netif_set_default(netif);
paleskyjp	0:d3c85ea81493	195	dhcp_start(netif); // <-- Use DHCP
paleskyjp	0:d3c85ea81493	196
paleskyjp	0:d3c85ea81493	197	/* Initialise all needed timers */
paleskyjp	0:d3c85ea81493	198	tickARP.attach_us( &etharp_tmr, ARP_TMR_INTERVAL * 1000);
paleskyjp	0:d3c85ea81493	199	tickFast.attach_us(&tcp_fasttmr, TCP_FAST_INTERVAL * 1000);
paleskyjp	0:d3c85ea81493	200	tickSlow.attach_us(&tcp_slowtmr, TCP_SLOW_INTERVAL * 1000);
paleskyjp	0:d3c85ea81493	201	dns_tick.attach_us(&dns_tmr, DNS_TMR_INTERVAL * 1000);
paleskyjp	0:d3c85ea81493	202	dhcp_coarse.attach_us(&dhcp_coarse_tmr, DHCP_COARSE_TIMER_MSECS * 1000);
paleskyjp	0:d3c85ea81493	203	dhcp_fine.attach_us(&dhcp_fine_tmr, DHCP_FINE_TIMER_MSECS * 1000);
paleskyjp	0:d3c85ea81493	204
paleskyjp	0:d3c85ea81493	205	// Wait for an IP Address
paleskyjp	0:d3c85ea81493	206	while (!netif_is_up(netif)) {
paleskyjp	0:d3c85ea81493	207	device_poll();
paleskyjp	0:d3c85ea81493	208	}
paleskyjp	0:d3c85ea81493	209
paleskyjp	0:d3c85ea81493	210	/* Connect do google */
paleskyjp	0:d3c85ea81493	211	struct tcp_pcb *pcb = tcp_new();
paleskyjp	0:d3c85ea81493	212	tcp_connect(pcb, &target, 80, &connected_callback);
paleskyjp	0:d3c85ea81493	213
paleskyjp	0:d3c85ea81493	214	/* Give the signal that we are ready */
paleskyjp	0:d3c85ea81493	215	printf("entering while loop\n");
paleskyjp	0:d3c85ea81493	216	while (1) {
paleskyjp	0:d3c85ea81493	217	led = !led;
paleskyjp	0:d3c85ea81493	218	wait(0.1);
paleskyjp	0:d3c85ea81493	219	device_poll();
paleskyjp	0:d3c85ea81493	220	}
paleskyjp	0:d3c85ea81493	221	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	03 Mar 2012
Imports:	37
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	3

main.cpp@0:d3c85ea81493, 2012-03-03 (annotated)

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