crypto/external/bsd/heimdal/dist/lib/krb5/net_write.c

   1 /*      $NetBSD: net_write.c,v 1.1.1.2 2014/04/24 12:45:50 pettai Exp $ */
   2
   3 /*
   4  * Copyright (c) 1997, 1998 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "krb5_locl.h"
  37
  38 KRB5_LIB_FUNCTION krb5_ssize_t KRB5_LIB_CALL
  39 krb5_net_write (krb5_context context,
  40                 void *p_fd,
  41                 const void *buf,
  42                 size_t len)
  43 {
  44     krb5_socket_t fd = *((krb5_socket_t *)p_fd);
  45     return net_write(fd, buf, len);
  46 }
  47
  48 KRB5_LIB_FUNCTION krb5_ssize_t KRB5_LIB_CALL
  49 krb5_net_write_block(krb5_context context,
  50                      void *p_fd,
  51                      const void *buf,
  52                      size_t len,
  53                      time_t timeout)
  54 {
  55   krb5_socket_t fd = *((krb5_socket_t *)p_fd);
  56   int ret;
  57   struct timeval tv, *tvp;
  58   const char *cbuf = (const char *)buf;
  59   size_t rem = len;
  60   ssize_t count;
  61   fd_set wfds;
  62
  63   do {
  64       FD_ZERO(&wfds);
  65       FD_SET(fd, &wfds);
  66
  67       if (timeout != 0) {
  68           tv.tv_sec = timeout;
  69           tv.tv_usec = 0;
  70           tvp = &tv;
  71       } else
  72           tvp = NULL;
  73
  74       ret = select(fd + 1, NULL, &wfds, NULL, tvp);
  75       if (rk_IS_SOCKET_ERROR(ret)) {
  76           if (rk_SOCK_ERRNO == EINTR)
  77               continue;
  78           return -1;
  79       }
  80
  81 #ifdef HAVE_WINSOCK
  82       if (ret == 0) {
  83           WSASetLastError( WSAETIMEDOUT );
  84           return 0;
  85       }
  86
  87       count = send (fd, cbuf, rem, 0);
  88
  89       if (rk_IS_SOCKET_ERROR(count)) {
  90           return -1;
  91       }
  92
  93 #else
  94       if (ret == 0) {
  95           return 0;
  96       }
  97
  98       if (!FD_ISSET(fd, &wfds)) {
  99           errno = ETIMEDOUT;
 100           return -1;
 101       }
 102
 103       count = write (fd, cbuf, rem);
 104
 105       if (count < 0) {
 106           if (errno == EINTR)
 107               continue;
 108           else
 109               return count;
 110       }
 111
 112 #endif
 113
 114       cbuf += count;
 115       rem -= count;
 116
 117   } while (rem > 0);
 118
 119   return len;
 120 }