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1 office 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_EXT(type, pool, name, errorblock) do { \
59 name = (type *)memp_malloc(pool); \
60 if (name == NULL) { \
61 errorblock; \
62 } \
63 } while(0)
64 #define API_VAR_ALLOC(type, pool, name, errorval) API_VAR_ALLOC_EXT(type, pool, name, return errorval)
65 #define API_VAR_ALLOC_POOL(type, pool, name, errorval) do { \
66 name = (type *)LWIP_MEMPOOL_ALLOC(pool); \
67 if (name == NULL) { \
68 return errorval; \
69 } \
70 } while(0)
71 #define API_VAR_FREE(pool, name) memp_free(pool, name)
72 #define API_VAR_FREE_POOL(pool, name) LWIP_MEMPOOL_FREE(pool, name)
73 #define API_EXPR_REF(expr) (&(expr))
74 #if LWIP_NETCONN_SEM_PER_THREAD
75 #define API_EXPR_REF_SEM(expr) (expr)
76 #else
77 #define API_EXPR_REF_SEM(expr) API_EXPR_REF(expr)
78 #endif
79 #define API_EXPR_DEREF(expr) expr
80 #define API_MSG_M_DEF(m) m
81 #define API_MSG_M_DEF_C(t, m) t m
82 #else /* LWIP_MPU_COMPATIBLE */
83 #define API_VAR_REF(name) name
84 #define API_VAR_DECLARE(type, name) type name
85 #define API_VAR_ALLOC_EXT(type, pool, name, errorblock)
86 #define API_VAR_ALLOC(type, pool, name, errorval)
87 #define API_VAR_ALLOC_POOL(type, pool, name, errorval)
88 #define API_VAR_FREE(pool, name)
89 #define API_VAR_FREE_POOL(pool, name)
90 #define API_EXPR_REF(expr) expr
91 #define API_EXPR_REF_SEM(expr) API_EXPR_REF(expr)
92 #define API_EXPR_DEREF(expr) (*(expr))
93 #define API_MSG_M_DEF(m) *m
94 #define API_MSG_M_DEF_C(t, m) const t * m
95 #endif /* LWIP_MPU_COMPATIBLE */
96  
97 err_t tcpip_send_msg_wait_sem(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem);
98  
99 struct tcpip_api_call_data
100 {
101 #if !LWIP_TCPIP_CORE_LOCKING
102 err_t err;
103 #if !LWIP_NETCONN_SEM_PER_THREAD
104 sys_sem_t sem;
105 #endif /* LWIP_NETCONN_SEM_PER_THREAD */
106 #else /* !LWIP_TCPIP_CORE_LOCKING */
107 u8_t dummy; /* avoid empty struct :-( */
108 #endif /* !LWIP_TCPIP_CORE_LOCKING */
109 };
110 typedef err_t (*tcpip_api_call_fn)(struct tcpip_api_call_data* call);
111 err_t tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call_data *call);
112  
113 enum tcpip_msg_type {
114 TCPIP_MSG_API,
115 TCPIP_MSG_API_CALL,
116 TCPIP_MSG_INPKT,
117 #if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
118 TCPIP_MSG_TIMEOUT,
119 TCPIP_MSG_UNTIMEOUT,
120 #endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
121 TCPIP_MSG_CALLBACK,
122 TCPIP_MSG_CALLBACK_STATIC
123 };
124  
125 struct tcpip_msg {
126 enum tcpip_msg_type type;
127 union {
128 struct {
129 tcpip_callback_fn function;
130 void* msg;
131 } api_msg;
132 struct {
133 tcpip_api_call_fn function;
134 struct tcpip_api_call_data *arg;
135 sys_sem_t *sem;
136 } api_call;
137 struct {
138 struct pbuf *p;
139 struct netif *netif;
140 netif_input_fn input_fn;
141 } inp;
142 struct {
143 tcpip_callback_fn function;
144 void *ctx;
145 } cb;
146 #if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
147 struct {
148 u32_t msecs;
149 sys_timeout_handler h;
150 void *arg;
151 } tmo;
152 #endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
153 } msg;
154 };
155  
156 #ifdef __cplusplus
157 }
158 #endif
159  
160 #endif /* !NO_SYS */
161  
162 #endif /* LWIP_HDR_TCPIP_PRIV_H */