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

   1 /**
   2  * @file
   3  * Sockets API internal implementations (do not use in application code)
   4  */
   5
   6 /*
   7  * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. <joel.cunningham@garmin.com>
   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: Joel Cunningham <joel.cunningham@me.com>
  35  *
  36  */
  37 #ifndef LWIP_HDR_SOCKETS_PRIV_H
  38 #define LWIP_HDR_SOCKETS_PRIV_H
  39
  40 #include "lwip/opt.h"
  41
  42 #if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
  43
  44 #include "lwip/err.h"
  45 #include "lwip/sockets.h"
  46
  47 #ifdef __cplusplus
  48 extern "C" {
  49 #endif
  50
  51 #if LWIP_SOCKET_SET_ERRNO
  52 #ifndef set_errno
  53 #define set_errno(err) do { if (err) { errno = (err); } } while(0)
  54 #endif
  55 #else /* LWIP_SOCKET_SET_ERRNO */
  56 #define set_errno(err)
  57 #endif /* LWIP_SOCKET_SET_ERRNO */
  58
  59 #if !LWIP_TCPIP_CORE_LOCKING
  60 /** Maximum optlen used by setsockopt/getsockopt */
  61 #define LWIP_SETGETSOCKOPT_MAXOPTLEN 16
  62
  63 /** This struct is used to pass data to the set/getsockopt_internal
  64  * functions running in tcpip_thread context (only a void* is allowed) */
  65 struct lwip_setgetsockopt_data {
  66   /** socket index for which to change options */
  67   int s;
  68   /** level of the option to process */
  69   int level;
  70   /** name of the option to process */
  71   int optname;
  72   /** set: value to set the option to
  73     * get: value of the option is stored here */
  74 #if LWIP_MPU_COMPATIBLE
  75   u8_t optval[LWIP_SETGETSOCKOPT_MAXOPTLEN];
  76 #else
  77   union {
  78     void *p;
  79     const void *pc;
  80   } optval;
  81 #endif
  82   /** size of *optval */
  83   socklen_t optlen;
  84   /** if an error occurs, it is temporarily stored here */
  85   int err;
  86   /** semaphore to wake up the calling task */
  87   void* completed_sem;
  88 };
  89 #endif /* !LWIP_TCPIP_CORE_LOCKING */
  90
  91 #ifdef __cplusplus
  92 }
  93 #endif
  94
  95 #endif /* LWIP_SOCKET */
  96
  97 #endif /* LWIP_HDR_SOCKETS_PRIV_H */