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
36RCSID("$Id: net_write.c 13863 2004-05-25 21:46:46Z lha $");
37
38krb5_ssize_t KRB5_LIB_FUNCTION
39krb5_net_write (krb5_context context,
40		void *p_fd,
41		const void *buf,
42		size_t len)
43{
44  int fd = *((int *)p_fd);
45
46  return net_write (fd, buf, len);
47}
48
49krb5_ssize_t KRB5_LIB_FUNCTION
50krb5_net_write_block(krb5_context context,
51		     void *p_fd,
52		     const void *buf,
53		     size_t len,
54		     time_t timeout)
55{
56  int fd = *((int *)p_fd);
57  int ret;
58  struct timeval tv, *tvp;
59  const char *cbuf = (const char *)buf;
60  size_t rem = len;
61  ssize_t count;
62  fd_set wfds;
63
64  do {
65      FD_ZERO(&wfds);
66      FD_SET(fd, &wfds);
67
68      if (timeout != 0) {
69	  tv.tv_sec = timeout;
70	  tv.tv_usec = 0;
71	  tvp = &tv;
72      } else
73	  tvp = NULL;
74
75      ret = select(fd + 1, NULL, &wfds, NULL, tvp);
76      if (ret < 0) {
77	  if (errno == EINTR)
78	      continue;
79	  return -1;
80      } else if (ret == 0)
81	  return 0;
82
83      if (!FD_ISSET(fd, &wfds)) {
84	  errno = ETIMEDOUT;
85	  return -1;
86      }
87
88#ifdef WIN32
89      count = send (fd, cbuf, rem, 0);
90#else
91      count = write (fd, cbuf, rem);
92#endif
93      if (count < 0) {
94	  if (errno == EINTR)
95	      continue;
96	  else
97	      return count;
98      }
99      cbuf += count;
100      rem -= count;
101
102  } while (rem > 0);
103
104  return len;
105}
106