#include <os.h>
#include <xmalloc.h>
#include <console.h>
#include <netfront.h>
#include <lwip/api.h>

#define DIE(assertion, call_description)                \
    do {                                \
        if (assertion) {                    \
            tprintk("(%s, %d): %s\n",           \
                    __FILE__, __LINE__, call_description);  \
            return;             \
        }                           \
    } while(0)


void client_thread(void *p)
{

    struct netconn *netConn;
    struct ip_addr remote_ip;
    int rc;

    start_networking();

    struct ip_addr local_ip = { htonl(0x0a00020b) };
    struct ip_addr netmask = { htonl(0xffffff00) };
    struct ip_addr gw = { 0 };
    networking_set_addr(&local_ip, &netmask, &gw);

    netConn = netconn_new(NETCONN_TCP);
    DIE(!netConn, "netconn_new");

    remote_ip.addr = htonl(0x0a00020a);
    rc = netconn_connect(netConn, &remote_ip, 13);
    DIE(rc != ERR_OK, "netconn_connect");

    tprintk("Connected successfully!\n");

    struct netbuf *recvBuf;
    recvBuf = netconn_recv(netConn);
    DIE(!recvBuf, "netconn_recv");

    char *buf;
    int sz;

    rc = netbuf_data(recvBuf, (void**)&buf, (u16_t*)&sz);
    DIE(rc != ERR_OK, "ntebuf_data");
    tprintk( "Received: %s\n", buf);

    free(recvBuf);
    netconn_disconnect(netConn);
    netconn_delete(netConn);

}


int app_main(start_info_t *si)
{
    create_thread("client", client_thread, NULL);

    return 0;
}