minix/lib/liblwip/dist/src/include/lwip/priv/tcpip_priv.h

   1 /**
   2  * @file
   3  * TCPIP API internal implementations (do not use in application code)
   4  */
   5
   6 /*
   7  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without modification,
  11  * are permitted provided that the following conditions are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright notice,
  14  *    this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright notice,
  16  *    this list of conditions and the following disclaimer in the documentation
  17  *    and/or other materials provided with the distribution.
  18  * 3. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  22  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  24  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  26  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  30  * OF SUCH DAMAGE.
  31  *
  32  * This file is part of the lwIP TCP/IP stack.
  33  *
  34  * Author: Adam Dunkels <adam@sics.se>
  35  *
  36  */
  37 #ifndef LWIP_HDR_TCPIP_PRIV_H
  38 #define LWIP_HDR_TCPIP_PRIV_H
  39
  40 #include "lwip/opt.h"
  41
  42 #if !NO_SYS /* don't build if not configured for use in lwipopts.h */
  43
  44 #include "lwip/tcpip.h"
  45 #include "lwip/sys.h"
  46 #include "lwip/timeouts.h"
  47
  48 #ifdef __cplusplus
  49 extern "C" {
  50 #endif
  51
  52 struct pbuf;
  53 struct netif;
  54
  55 #if LWIP_MPU_COMPATIBLE
  56 #define API_VAR_REF(name)               (*(name))
  57 #define API_VAR_DECLARE(type, name)     type * name
  58 #define API_VAR_ALLOC(type, pool, name, errorval) do { \
  59                                           name = (type *)memp_malloc(pool); \
  60                                           if (name == NULL) { \
  61                                             return errorval; \
  62                                           } \
  63                                         } while(0)
  64 #define API_VAR_ALLOC_POOL(type, pool, name, errorval) do { \
  65                                           name = (type *)LWIP_MEMPOOL_ALLOC(pool); \
  66                                           if (name == NULL) { \
  67                                             return errorval; \
  68                                           } \
  69                                         } while(0)
  70 #define API_VAR_FREE(pool, name)        memp_free(pool, name)
  71 #define API_VAR_FREE_POOL(pool, name)   LWIP_MEMPOOL_FREE(pool, name)
  72 #define API_EXPR_REF(expr)              (&(expr))
  73 #if LWIP_NETCONN_SEM_PER_THREAD
  74 #define API_EXPR_REF_SEM(expr)          (expr)
  75 #else
  76 #define API_EXPR_REF_SEM(expr)          API_EXPR_REF(expr)
  77 #endif
  78 #define API_EXPR_DEREF(expr)            expr
  79 #define API_MSG_M_DEF(m)                m
  80 #define API_MSG_M_DEF_C(t, m)           t m
  81 #else /* LWIP_MPU_COMPATIBLE */
  82 #define API_VAR_REF(name)               name
  83 #define API_VAR_DECLARE(type, name)     type name
  84 #define API_VAR_ALLOC(type, pool, name, errorval)
  85 #define API_VAR_ALLOC_POOL(type, pool, name, errorval)
  86 #define API_VAR_FREE(pool, name)
  87 #define API_VAR_FREE_POOL(pool, name)
  88 #define API_EXPR_REF(expr)              expr
  89 #define API_EXPR_REF_SEM(expr)          API_EXPR_REF(expr)
  90 #define API_EXPR_DEREF(expr)            (*(expr))
  91 #define API_MSG_M_DEF(m)                *m
  92 #define API_MSG_M_DEF_C(t, m)           const t * m
  93 #endif /* LWIP_MPU_COMPATIBLE */
  94
  95 err_t tcpip_send_msg_wait_sem(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem);
  96
  97 struct tcpip_api_call_data
  98 {
  99 #if !LWIP_TCPIP_CORE_LOCKING
 100   err_t err;
 101 #if !LWIP_NETCONN_SEM_PER_THREAD
 102   sys_sem_t sem;
 103 #endif /* LWIP_NETCONN_SEM_PER_THREAD */
 104 #else /* !LWIP_TCPIP_CORE_LOCKING */
 105   u8_t dummy; /* avoid empty struct :-( */
 106 #endif /* !LWIP_TCPIP_CORE_LOCKING */
 107 };
 108 typedef err_t (*tcpip_api_call_fn)(struct tcpip_api_call_data* call);
 109 err_t tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call_data *call);
 110
 111 enum tcpip_msg_type {
 112   TCPIP_MSG_API,
 113   TCPIP_MSG_API_CALL,
 114   TCPIP_MSG_INPKT,
 115 #if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
 116   TCPIP_MSG_TIMEOUT,
 117   TCPIP_MSG_UNTIMEOUT,
 118 #endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
 119   TCPIP_MSG_CALLBACK,
 120   TCPIP_MSG_CALLBACK_STATIC
 121 };
 122
 123 struct tcpip_msg {
 124   enum tcpip_msg_type type;
 125   union {
 126     struct {
 127       tcpip_callback_fn function;
 128       void* msg;
 129     } api_msg;
 130     struct {
 131       tcpip_api_call_fn function;
 132       struct tcpip_api_call_data *arg;
 133       sys_sem_t *sem;
 134     } api_call;
 135     struct {
 136       struct pbuf *p;
 137       struct netif *netif;
 138       netif_input_fn input_fn;
 139     } inp;
 140     struct {
 141       tcpip_callback_fn function;
 142       void *ctx;
 143     } cb;
 144 #if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
 145     struct {
 146       u32_t msecs;
 147       sys_timeout_handler h;
 148       void *arg;
 149     } tmo;
 150 #endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
 151   } msg;
 152 };
 153
 154 #ifdef __cplusplus
 155 }
 156 #endif
 157
 158 #endif /* !NO_SYS */
 159
 160 #endif /* LWIP_HDR_TCPIP_PRIV_H */