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
krb5_net_write(krb5_context context,void * p_fd,const void * buf,size_t len)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
krb5_net_write_block(krb5_context context,void * p_fd,const void * buf,size_t len,time_t timeout)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 }
121