tcpip_priv.h

00001 /**
00002  * @file
00003  * TCPIP API internal implementations (do not use in application code)
00004  */
00005 
00006 /*
00007  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
00008  * All rights reserved.
00009  *
00010  * Redistribution and use in source and binary forms, with or without modification,
00011  * are permitted provided that the following conditions are met:
00012  *
00013  * 1. Redistributions of source code must retain the above copyright notice,
00014  *    this list of conditions and the following disclaimer.
00015  * 2. Redistributions in binary form must reproduce the above copyright notice,
00016  *    this list of conditions and the following disclaimer in the documentation
00017  *    and/or other materials provided with the distribution.
00018  * 3. The name of the author may not be used to endorse or promote products
00019  *    derived from this software without specific prior written permission.
00020  *
00021  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
00022  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
00023  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
00024  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00025  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
00026  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00027  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00028  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
00029  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
00030  * OF SUCH DAMAGE.
00031  *
00032  * This file is part of the lwIP TCP/IP stack.
00033  *
00034  * Author: Adam Dunkels <adam@sics.se>
00035  *
00036  */
00037 #ifndef LWIP_HDR_TCPIP_PRIV_H
00038 #define LWIP_HDR_TCPIP_PRIV_H
00039 
00040 #include "lwip/opt.h"
00041 
00042 #if !NO_SYS /* don't build if not configured for use in lwipopts.h */
00043 
00044 #include "lwip/tcpip.h"
00045 #include "lwip/sys.h"
00046 #include "lwip/timeouts.h"
00047 
00048 #ifdef __cplusplus
00049 extern "C" {
00050 #endif
00051 
00052 struct pbuf;
00053 struct netif;
00054 
00055 #if LWIP_MPU_COMPATIBLE
00056 #define API_VAR_REF(name)               (*(name))
00057 #define API_VAR_DECLARE(type, name)     type * name
00058 #define API_VAR_ALLOC(type, pool, name, errorval) do { \
00059                                           name = (type *)memp_malloc(pool); \
00060                                           if (name == NULL) { \
00061                                             return errorval; \
00062                                           } \
00063                                         } while(0)
00064 #define API_VAR_ALLOC_POOL(type, pool, name, errorval) do { \
00065                                           name = (type *)LWIP_MEMPOOL_ALLOC(pool); \
00066                                           if (name == NULL) { \
00067                                             return errorval; \
00068                                           } \
00069                                         } while(0)
00070 #define API_VAR_FREE(pool, name)        memp_free(pool, name)
00071 #define API_VAR_FREE_POOL(pool, name)   LWIP_MEMPOOL_FREE(pool, name)
00072 #define API_EXPR_REF(expr)              (&(expr))
00073 #if LWIP_NETCONN_SEM_PER_THREAD
00074 #define API_EXPR_REF_SEM(expr)          (expr)
00075 #else
00076 #define API_EXPR_REF_SEM(expr)          API_EXPR_REF(expr)
00077 #endif
00078 #define API_EXPR_DEREF(expr)            expr
00079 #define API_MSG_M_DEF(m)                m
00080 #define API_MSG_M_DEF_C(t, m)           t m
00081 #else /* LWIP_MPU_COMPATIBLE */
00082 #define API_VAR_REF(name)               name
00083 #define API_VAR_DECLARE(type, name)     type name
00084 #define API_VAR_ALLOC(type, pool, name, errorval)
00085 #define API_VAR_ALLOC_POOL(type, pool, name, errorval)
00086 #define API_VAR_FREE(pool, name)
00087 #define API_VAR_FREE_POOL(pool, name)
00088 #define API_EXPR_REF(expr)              expr
00089 #define API_EXPR_REF_SEM(expr)          API_EXPR_REF(expr)
00090 #define API_EXPR_DEREF(expr)            (*(expr))
00091 #define API_MSG_M_DEF(m)                *m
00092 #define API_MSG_M_DEF_C(t, m)           const t * m
00093 #endif /* LWIP_MPU_COMPATIBLE */
00094 
00095 err_t tcpip_send_msg_wait_sem(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem);
00096 
00097 struct tcpip_api_call_data
00098 {
00099 #if !LWIP_TCPIP_CORE_LOCKING
00100   err_t err;
00101 #if !LWIP_NETCONN_SEM_PER_THREAD
00102   sys_sem_t sem;
00103 #endif /* LWIP_NETCONN_SEM_PER_THREAD */
00104 #else /* !LWIP_TCPIP_CORE_LOCKING */
00105   u8_t dummy; /* avoid empty struct :-( */
00106 #endif /* !LWIP_TCPIP_CORE_LOCKING */
00107 };
00108 typedef err_t (*tcpip_api_call_fn)(struct tcpip_api_call_data* call);
00109 err_t tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call_data *call);
00110 
00111 enum tcpip_msg_type {
00112   TCPIP_MSG_API,
00113   TCPIP_MSG_API_CALL,
00114   TCPIP_MSG_INPKT,
00115 #if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
00116   TCPIP_MSG_TIMEOUT,
00117   TCPIP_MSG_UNTIMEOUT,
00118 #endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
00119   TCPIP_MSG_CALLBACK,
00120   TCPIP_MSG_CALLBACK_STATIC
00121 };
00122 
00123 struct tcpip_msg {
00124   enum tcpip_msg_type type;
00125   union {
00126     struct {
00127       tcpip_callback_fn function;
00128       void* msg;
00129     } api_msg;
00130     struct {
00131       tcpip_api_call_fn function;
00132       struct tcpip_api_call_data *arg;
00133       sys_sem_t *sem;
00134     } api_call;
00135     struct {
00136       struct pbuf *p;
00137       struct netif *netif;
00138       netif_input_fn input_fn;
00139     } inp;
00140     struct {
00141       tcpip_callback_fn function;
00142       void *ctx;
00143     } cb;
00144 #if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
00145     struct {
00146       u32_t msecs;
00147       sys_timeout_handler h;
00148       void *arg;
00149     } tmo;
00150 #endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
00151   } msg;
00152 };
00153 
00154 #ifdef __cplusplus
00155 }
00156 #endif
00157 
00158 #endif /* !NO_SYS */
00159 
00160 #endif /* LWIP_HDR_TCPIP_PRIV_H */