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