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inetq/inetq.c

Requests an URL from the Internet. Demonstrates DNS query and default route usage.

#define DNSSERVERIP     "192.168.192.2"
#define INETSERVER  "www.kornet.net"
#define INETSERVERPORT  80
#define INETURL         "/"
#define MY_MAC          {0x00,0x06,0x98,0x20,0x00,0x00}
#define MY_IP           "192.168.192.100"
#define MY_MASK         "255.255.255.0"
#define MY_GATE         "192.168.192.3"

#include <string.h>
#include <stdio.h>
#include <io.h>

#include <dev/debug.h>
#ifdef ETHERNUT2
#include <dev/lanc111.h>
#else
#include <dev/nicrtl.h>
#endif

#include <sys/heap.h>
#include <sys/thread.h>
#include <sys/timer.h>
#include <sys/socket.h>
#include <sys/confnet.h>

#include <arpa/inet.h>
#include <net/route.h>
#include <netdb.h>

#include <pro/dhcp.h>

static u_char buff[1024];
static u_char my_mac[] = MY_MAC;

/*
 * Main application routine. 
 *
 */
int main(void)
{
    u_long baud = 115200;
    TCPSOCKET *sock;
    FILE *stream;
    u_long rip;
    u_long ip_addr;
    int bite;
    size_t rc;
    size_t len;
    u_long start_time;
    u_long total_bytes;

    /*
     * Initialize the uart device.
     */
    NutRegisterDevice(&devDebug0, 0, 0);
    freopen("uart0", "w", stdout);
    _ioctl(_fileno(stdout), UART_SETSPEED, &baud);
    puts("\nInetQuery 1.0");

    /*
     * Register Realtek controller at address 8300 hex and interrupt 5.
     */
    puts("Configuring Ethernet interface");
    NutRegisterDevice(&DEV_ETHER, 0x8300, 5);

    /*
     * Try DHCP. First use MAC from EEPROM.
     */
    if (NutDhcpIfConfig("eth0", 0, 60000) && NutDhcpIfConfig("eth0", my_mac, 60000)) {
        /*
         * No DHCP server available. Use hard coded values.
         */
        ip_addr = inet_addr(MY_IP);
        NutNetIfConfig("eth0", my_mac, ip_addr, inet_addr(MY_MASK));
        NutIpRouteAdd(0, 0, inet_addr(MY_GATE), &DEV_ETHER);
        NutDnsConfig(0, 0, inet_addr(DNSSERVERIP));
    } else
        ip_addr = confnet.cdn_ip_addr;
    printf("%s ready\n", inet_ntoa(ip_addr));


    /*
     * Resolve hostname using DNS.
     */
    if ((rip = NutDnsGetHostByName(INETSERVER)) != 0) {

        /*
         * Let's try a stdio stream first.
         */
        if ((sock = NutTcpCreateSocket()) != 0) {

            /*
             * Connect a HTTP server in the Internet.
             */
            printf("Connecting %s:%u\r\n", inet_ntoa(rip), INETSERVERPORT);
            if (NutTcpConnect(sock, rip, INETSERVERPORT) == 0) {

                /*
                 * Assign a stream to our connected socket.
                 */
                if ((stream = _fdopen((int) sock, "r+b")) != 0) {
                    /*
                     * Send HTTP request to the server.
                     */
                    fprintf(stream, "GET %s HTTP/1.0\r\n", INETURL);
                    fputs("User-Agent: Ethernut [en] (NutOS)\r\n", stream);
                    fputs("\r\n", stream);
                    fflush(stream);

                    /*
                     * Init measure values.
                     */
                    start_time = NutGetTickCount();
                    total_bytes = 0;

                    /*
                     * Read server response and send it to the UART.
                     */
                    while (fgets(buff, sizeof(buff), stream)) {
                        puts(buff);
                        total_bytes += strlen(buff);
                    }
                    printf("Transfered %lu bytes in %lu seconds\n", total_bytes, (NutGetTickCount() - start_time) / 16UL);
                    fclose(stream);
                } else
                    puts("Creating stream device failed");

            } else {
                printf("Bad news, %s refuses the connection.\n", INETSERVER);
            }
            printf("Disconnecting %s:%u\n", inet_ntoa(rip), INETSERVERPORT);
            NutTcpCloseSocket(sock);
        }

        NutSleep(5000);

        /*
         * Now let's use native calls.
         */
        if ((sock = NutTcpCreateSocket()) != 0) {

            /*
             * Connect a HTTP server in the Internet.
             */
            printf("Connecting %s:%u\r\n", inet_ntoa(rip), INETSERVERPORT);
            if (NutTcpConnect(sock, rip, INETSERVERPORT) == 0) {

                /*
                 * Send HTTP request to the server. NutTcpSend() doesn't
                 * guarantee to send out all bytes, thus the loop.
                 */
                strcpy(buff, "GET " INETURL " HTTP/1.0\r\nUser-Agent: Ethernut [en] (NutOS)\r\n\r\n");
                len = (int) strlen(buff);
                for (rc = 0; rc < len; rc += bite)
                    if ((bite = NutTcpSend(sock, buff + rc, len - rc)) <= 0)
                        break;

                /*
                 * Init measure values.
                 */
                start_time = NutGetTickCount();
                total_bytes = 0;

                /*
                 * Read server response and send it to the UART.
                 */
                while ((bite = NutTcpReceive(sock, buff, sizeof(buff) - 1)) > 0) {
                    total_bytes += bite;
                    buff[bite] = 0;
                    puts(buff);
                }
                printf("Transfered %lu bytes in %lu seconds\n", total_bytes, (NutGetTickCount() - start_time) / 16UL);
            } else {
                printf("Bad news, %s refuses the connection.\n", INETSERVER);
            }
            printf("Disconnecting %s:%u\n", inet_ntoa(rip), INETSERVERPORT);
            NutTcpCloseSocket(sock);
        }
    } else
        printf("Great news, %s has been removed!\n", INETSERVER);

    for (;;)
        NutSleep(1000);
}

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