Keil Studio Cloud
Mistake on this page?
Report an issue in GitHub or email us
api_msg.h
Go to the documentation of this file.
1 /**
2  * @file
3  * netconn API lwIP 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_API_MSG_H
38 #define LWIP_HDR_API_MSG_H
39 
40 #include "lwip/opt.h"
41 
42 #include "lwip/arch.h"
43 #include "lwip/ip_addr.h"
44 #include "lwip/err.h"
45 #include "lwip/sys.h"
46 #include "lwip/igmp.h"
47 #include "lwip/api.h"
48 #include "lwip/priv/tcpip_priv.h"
49 
50 #ifdef __cplusplus
51 extern "C" {
52 #endif
53 
54 #if LWIP_NETCONN || LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
55 /* Note: Netconn API is always available when sockets are enabled -
56  * sockets are implemented on top of them */
57 
58 #if LWIP_MPU_COMPATIBLE
59 #if LWIP_NETCONN_SEM_PER_THREAD
60 #define API_MSG_M_DEF_SEM(m) *m
61 #else
62 #define API_MSG_M_DEF_SEM(m) API_MSG_M_DEF(m)
63 #endif
64 #else /* LWIP_MPU_COMPATIBLE */
65 #define API_MSG_M_DEF_SEM(m) API_MSG_M_DEF(m)
66 #endif /* LWIP_MPU_COMPATIBLE */
67 
68 /* For the netconn API, these values are use as a bitmask! */
69 #define NETCONN_SHUT_RD 1
70 #define NETCONN_SHUT_WR 2
71 #define NETCONN_SHUT_RDWR (NETCONN_SHUT_RD | NETCONN_SHUT_WR)
72 
73 /* IP addresses and port numbers are expected to be in
74  * the same byte order as in the corresponding pcb.
75  */
76 /** This struct includes everything that is necessary to execute a function
77  for a netconn in another thread context (mainly used to process netconns
78  in the tcpip_thread context to be thread safe). */
79 struct api_msg {
80  /** The netconn which to process - always needed: it includes the semaphore
81  which is used to block the application thread until the function finished. */
82  struct netconn *conn;
83  /** The return value of the function executed in tcpip_thread. */
84  err_t err;
85  /** Depending on the executed function, one of these union members is used */
86  union {
87  /** used for lwip_netconn_do_send */
88  struct netbuf *b;
89  /** used for lwip_netconn_do_newconn */
90  struct {
91  u8_t proto;
92  } n;
93  /** used for lwip_netconn_do_bind and lwip_netconn_do_connect */
94  struct {
95  API_MSG_M_DEF_C(ip_addr_t, ipaddr);
96  u16_t port;
97  u8_t if_idx;
98  } bc;
99  /** used for lwip_netconn_do_getaddr */
100  struct {
101  ip_addr_t API_MSG_M_DEF(ipaddr);
102  u16_t API_MSG_M_DEF(port);
103  u8_t local;
104  } ad;
105  /** used for lwip_netconn_do_write */
106  struct {
107  /** current vector to write */
108  const struct netvector *vector;
109  /** number of unwritten vectors */
110  u16_t vector_cnt;
111  /** offset into current vector */
112  size_t vector_off;
113  /** total length across vectors */
114  size_t len;
115  /** offset into total length/output of bytes written when err == ERR_OK */
116  size_t offset;
117  u8_t apiflags;
118 #if LWIP_SO_SNDTIMEO
119  u32_t time_started;
120 #endif /* LWIP_SO_SNDTIMEO */
121  } w;
122  /** used for lwip_netconn_do_recv */
123  struct {
124  size_t len;
125  } r;
126 #if LWIP_TCP
127  /** used for lwip_netconn_do_close (/shutdown) */
128  struct {
129  u8_t shut;
130 #if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER
131  u32_t time_started;
132 #else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
133  u8_t polls_left;
134 #endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
135  } sd;
136 #endif /* LWIP_TCP */
137 #if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
138  /** used for lwip_netconn_do_join_leave_group */
139  struct {
140  API_MSG_M_DEF_C(ip_addr_t, multiaddr);
141  API_MSG_M_DEF_C(ip_addr_t, netif_addr);
142  u8_t if_idx;
143  enum netconn_igmp join_or_leave;
144  } jl;
145 #endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
146 #if TCP_LISTEN_BACKLOG
147  struct {
148  u8_t backlog;
149  } lb;
150 #endif /* TCP_LISTEN_BACKLOG */
151  } msg;
152 #if LWIP_NETCONN_SEM_PER_THREAD
153  sys_sem_t* op_completed_sem;
154 #endif /* LWIP_NETCONN_SEM_PER_THREAD */
155 };
156 
157 #if LWIP_NETCONN_SEM_PER_THREAD
158 #define LWIP_API_MSG_SEM(msg) ((msg)->op_completed_sem)
159 #else /* LWIP_NETCONN_SEM_PER_THREAD */
160 #define LWIP_API_MSG_SEM(msg) (&(msg)->conn->op_completed)
161 #endif /* LWIP_NETCONN_SEM_PER_THREAD */
162 
163 
164 #if LWIP_DNS
165 /** As lwip_netconn_do_gethostbyname requires more arguments but doesn't require a netconn,
166  it has its own struct (to avoid struct api_msg getting bigger than necessary).
167  lwip_netconn_do_gethostbyname must be called using tcpip_callback instead of tcpip_apimsg
168  (see netconn_gethostbyname). */
169 struct dns_api_msg {
170  /** Hostname to query or dotted IP address string */
171 #if LWIP_MPU_COMPATIBLE
172  char name[DNS_MAX_NAME_LENGTH];
173 #else /* LWIP_MPU_COMPATIBLE */
174  const char *name;
175 #endif /* LWIP_MPU_COMPATIBLE */
176  /** The resolved address is stored here */
177  ip_addr_t API_MSG_M_DEF(addr);
178 #if LWIP_IPV4 && LWIP_IPV6
179  /** Type of resolve call */
180  u8_t dns_addrtype;
181 #endif /* LWIP_IPV4 && LWIP_IPV6 */
182  /** This semaphore is posted when the name is resolved, the application thread
183  should wait on it. */
184  sys_sem_t API_MSG_M_DEF_SEM(sem);
185  /** Errors are given back here */
186  err_t API_MSG_M_DEF(err);
187 };
188 #endif /* LWIP_DNS */
189 
190 #if LWIP_NETCONN_FULLDUPLEX
191 int lwip_netconn_is_deallocated_msg(void *msg);
192 #endif
193 int lwip_netconn_is_err_msg(void *msg, err_t *err);
194 void lwip_netconn_do_newconn (void *m);
195 void lwip_netconn_do_delconn (void *m);
196 void lwip_netconn_do_bind (void *m);
197 void lwip_netconn_do_bind_if (void *m);
198 void lwip_netconn_do_connect (void *m);
199 void lwip_netconn_do_disconnect (void *m);
200 void lwip_netconn_do_listen (void *m);
201 void lwip_netconn_do_send (void *m);
202 void lwip_netconn_do_recv (void *m);
203 #if TCP_LISTEN_BACKLOG
204 void lwip_netconn_do_accepted (void *m);
205 #endif /* TCP_LISTEN_BACKLOG */
206 void lwip_netconn_do_write (void *m);
207 void lwip_netconn_do_getaddr (void *m);
208 void lwip_netconn_do_close (void *m);
209 void lwip_netconn_do_shutdown (void *m);
210 #if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
211 void lwip_netconn_do_join_leave_group(void *m);
212 void lwip_netconn_do_join_leave_group_netif(void *m);
213 #endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
214 
215 #if LWIP_DNS
216 void lwip_netconn_do_gethostbyname(void *arg);
217 #endif /* LWIP_DNS */
218 
219 struct netconn* netconn_alloc(enum netconn_type t, netconn_callback callback);
220 void netconn_free(struct netconn *conn);
221 
222 #endif /* LWIP_NETCONN || LWIP_SOCKET */
223 
224 #if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
225 
226 /* netifapi related lwIP internal definitions */
227 
228 #if LWIP_MPU_COMPATIBLE
229 #define NETIFAPI_IPADDR_DEF(type, m) type m
230 #else /* LWIP_MPU_COMPATIBLE */
231 #define NETIFAPI_IPADDR_DEF(type, m) const type * m
232 #endif /* LWIP_MPU_COMPATIBLE */
233 
234 typedef void (*netifapi_void_fn)(struct netif *netif);
235 typedef err_t (*netifapi_errt_fn)(struct netif *netif);
236 
237 struct netifapi_msg {
238  struct tcpip_api_call_data call;
239  struct netif *netif;
240  union {
241  struct {
242 #if LWIP_IPV4
243  NETIFAPI_IPADDR_DEF(ip4_addr_t, ipaddr);
244  NETIFAPI_IPADDR_DEF(ip4_addr_t, netmask);
245  NETIFAPI_IPADDR_DEF(ip4_addr_t, gw);
246 #endif /* LWIP_IPV4 */
247  void *state;
248  netif_init_fn init;
249  netif_input_fn input;
250  } add;
251  struct {
252  netifapi_void_fn voidfunc;
253  netifapi_errt_fn errtfunc;
254  } common;
255  struct {
256 #if LWIP_MPU_COMPATIBLE
257  char name[NETIF_NAMESIZE];
258 #else /* LWIP_MPU_COMPATIBLE */
259  char *name;
260 #endif /* LWIP_MPU_COMPATIBLE */
261  u8_t index;
262  } ifs;
263  } msg;
264 };
265 
266 #endif /* LWIP_NETIF_API */
267 
268 #ifdef __cplusplus
269 }
270 #endif
271 
272 #endif /* LWIP_HDR_API_MSG_H */
netif_input_fn
err_t(* netif_input_fn)(struct pbuf *p, struct netif *inp)
Function prototype for netif->input functions.
Definition: netif.h:179
api.h
netconn API (to be used from non-TCPIP threads)
sys.h
OS abstraction layer.
opt.h
lwIP Options Configuration
tcpip_priv.h
TCPIP API internal implementations (do not use in application code)
mbed::callback
Callback< R(ArgTs...)> callback(R(*func)(ArgTs...)=nullptr) noexcept
Create a callback class with type inferred from the arguments.
Definition: Callback.h:678
NETIF_NAMESIZE
#define NETIF_NAMESIZE
The size of a fully constructed netif name which the netif can be identified by in APIs...
Definition: netif.h:71
DNS_MAX_NAME_LENGTH
#define DNS_MAX_NAME_LENGTH
DNS maximum host name length supported in the name table.
Definition: opt.h:1105
err.h
lwIP Error codes
tcpip_api_call_data
Definition: tcpip_priv.h:99
netif
Generic data structure used for all lwIP network interfaces.
Definition: ppp_service_if.h:157
netif_init_fn
err_t(* netif_init_fn)(struct netif *netif)
Function prototype for netif init functions.
Definition: netif.h:169
igmp.h
IGMP API.
err_t
s8_t err_t
Define LWIP_ERR_T in cc.h if you want to use a different type for your platform (must be signed)...
Definition: err.h:96
sys_sem_t
Definition: sys/arch/sys_arch.h:32
nsapi_addr
IP address structure for passing IP addresses by value.
Definition: nsapi_types.h:235
arch.h
Support for different processor and compiler architectures.
ip_addr.h
IP address API (common IPv4 and IPv6)
Important Information for this Arm website

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.