Example program with HTTPServer and sensor data streaming over TCPSockets, using Donatien Garnier's Net APIs and services code on top of LWIP. Files StreamServer.h and .cpp encapsulate streaming over TCPSockets. Broadcast is done by sendToAll(), and all incoming data is echoed back to the client. Echo code can be replaced with some remote control of the streaming interface. See main() that shows how to periodically send some data to all subscribed clients. To subscribe, a client should open a socket at <mbed_ip> port 123. I used few lines in TCL code to set up a quick sink for the data. HTTP files are served on port 80 concurrently to the streaming.

Dependencies:   mbed

lwip/include/lwip/netifapi.h

Committer:
iva2k
Date:
2010-06-12
Revision:
0:e614f7875b60

File content as of revision 0:e614f7875b60:

/*
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 */
 
#ifndef __LWIP_NETIFAPI_H__
#define __LWIP_NETIFAPI_H__

#include "lwip/opt.h"

#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */

#include "lwip/sys.h"
#include "lwip/netif.h"
#include "lwip/dhcp.h"
#include "lwip/autoip.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef void (*netifapi_void_fn)(struct netif *netif);
typedef err_t (*netifapi_errt_fn)(struct netif *netif);

struct netifapi_msg_msg {
#if !LWIP_TCPIP_CORE_LOCKING
  sys_sem_t sem;
#endif /* !LWIP_TCPIP_CORE_LOCKING */
  err_t err;
  struct netif *netif;
  union {
    struct {
      ip_addr_t *ipaddr;
      ip_addr_t *netmask;
      ip_addr_t *gw;
      void *state;
      netif_init_fn init;
      netif_input_fn input;
    } add;
    struct {
      netifapi_void_fn voidfunc;
      netifapi_errt_fn errtfunc;
    } common;
  } msg;
};

struct netifapi_msg {
  void (* function)(struct netifapi_msg_msg *msg);
  struct netifapi_msg_msg msg;
};


/* API for application */
err_t netifapi_netif_add       ( struct netif *netif,
                                 ip_addr_t *ipaddr,
                                 ip_addr_t *netmask,
                                 ip_addr_t *gw,
                                 void *state,
                                 netif_init_fn init,
                                 netif_input_fn input);

err_t netifapi_netif_set_addr  ( struct netif *netif,
                                 ip_addr_t *ipaddr,
                                 ip_addr_t *netmask,
                                 ip_addr_t *gw );

err_t netifapi_netif_common    ( struct netif *netif,
                                 netifapi_void_fn voidfunc,
                                 netifapi_errt_fn errtfunc);

#define netifapi_netif_remove(n)      netifapi_netif_common(n, netif_remove, NULL)
#define netifapi_netif_set_up(n)      netifapi_netif_common(n, netif_set_up, NULL)
#define netifapi_netif_set_down(n)    netifapi_netif_common(n, netif_set_down, NULL)
#define netifapi_netif_set_default(n) netifapi_netif_common(n, netif_set_default, NULL)
#define netifapi_dhcp_start(n)        netifapi_netif_common(n, NULL, dhcp_start)
#define netifapi_dhcp_stop(n)         netifapi_netif_common(n, dhcp_stop, NULL)
#define netifapi_autoip_start(n)      netifapi_netif_common(n, NULL, autoip_start)
#define netifapi_autoip_stop(n)       netifapi_netif_common(n, NULL, autoip_stop)

#ifdef __cplusplus
}
#endif

#endif /* LWIP_NETIF_API */

#endif /* __LWIP_NETIFAPI_H__ */