1/*	$NetBSD: net_write.c,v 1.1.1.1 2011/04/13 18:15:36 elric 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
38KRB5_LIB_FUNCTION krb5_ssize_t KRB5_LIB_CALL
39krb5_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
48KRB5_LIB_FUNCTION krb5_ssize_t KRB5_LIB_CALL
49krb5_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}
121