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/*

 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.

 * All rights reserved.

 *

 * 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.

 *

 * Author: Adam Dunkels <adam@sics.se>

 *

 */

#ifndef __LWIP_TCPIP_H__

#define __LWIP_TCPIP_H__

#include "lwip/opt.h"

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

#include "lwip/api_msg.h"

#include "lwip/netifapi.h"

#include "lwip/pbuf.h"

#include "lwip/api.h"

#include "lwip/sys.h"

#include "lwip/netif.h"

#ifdef __cplusplus

extern "C" {

#endif

#if LWIP_TCPIP_CORE_LOCKING

/** The global semaphore to lock the stack. */

extern sys_sem_t lock_tcpip_core;

#define LOCK_TCPIP_CORE()     sys_sem_wait(lock_tcpip_core)

#define UNLOCK_TCPIP_CORE()   sys_sem_signal(lock_tcpip_core)

#define TCPIP_APIMSG(m)       tcpip_apimsg_lock(m)

#define TCPIP_APIMSG_ACK(m)

#define TCPIP_NETIFAPI(m)     tcpip_netifapi_lock(m)

#define TCPIP_NETIFAPI_ACK(m)

#else

#define LOCK_TCPIP_CORE()

#define UNLOCK_TCPIP_CORE()

#define TCPIP_APIMSG(m)       tcpip_apimsg(m)

#define TCPIP_APIMSG_ACK(m)   sys_sem_signal(m->conn->op_completed)

#define TCPIP_NETIFAPI(m)     tcpip_netifapi(m)

#define TCPIP_NETIFAPI_ACK(m) sys_sem_signal(m->sem)

#endif /* LWIP_TCPIP_CORE_LOCKING */

void tcpip_init(void (* tcpip_init_done)(void *), void *arg);

#if LWIP_NETCONN

err_t tcpip_apimsg(struct api_msg *apimsg);

#if LWIP_TCPIP_CORE_LOCKING

err_t tcpip_apimsg_lock(struct api_msg *apimsg);

#endif /* LWIP_TCPIP_CORE_LOCKING */

#endif /* LWIP_NETCONN */

err_t tcpip_input(struct pbuf *p, struct netif *inp);

#if LWIP_NETIF_API

err_t tcpip_netifapi(struct netifapi_msg *netifapimsg);

#if LWIP_TCPIP_CORE_LOCKING

err_t tcpip_netifapi_lock(struct netifapi_msg *netifapimsg);

#endif /* LWIP_TCPIP_CORE_LOCKING */

#endif /* LWIP_NETIF_API */

err_t tcpip_callback_with_block(void (*f)(void *ctx), void *ctx, u8_t block);

#define tcpip_callback(f, ctx)              tcpip_callback_with_block(f, ctx, 1)

/* free pbufs or heap memory from another context without blocking */

err_t pbuf_free_callback(struct pbuf *p);

err_t mem_free_callback(void *m);

err_t tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg);

err_t tcpip_untimeout(sys_timeout_handler h, void *arg);

enum tcpip_msg_type {

#if LWIP_NETCONN

  TCPIP_MSG_API,

#endif /* LWIP_NETCONN */

  TCPIP_MSG_INPKT,

#if LWIP_NETIF_API

  TCPIP_MSG_NETIFAPI,

#endif /* LWIP_NETIF_API */

  TCPIP_MSG_CALLBACK,

  TCPIP_MSG_TIMEOUT,

  TCPIP_MSG_UNTIMEOUT

};

struct tcpip_msg {

  enum tcpip_msg_type type;

  sys_sem_t *sem;

  union {

#if LWIP_NETCONN

    struct api_msg *apimsg;

#endif /* LWIP_NETCONN */

#if LWIP_NETIF_API

    struct netifapi_msg *netifapimsg;

#endif /* LWIP_NETIF_API */

    struct {

      struct pbuf *p;

      struct netif *netif;

    } inp;

    struct {

      void (*f)(void *ctx);

      void *ctx;

    } cb;

    struct {

      u32_t msecs;

      sys_timeout_handler h;

      void *arg;

    } tmo;

  } msg;

};

#ifdef __cplusplus

}

#endif

#endif /* !NO_SYS */

#endif /* __LWIP_TCPIP_H__ */