1/*
2 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
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_error_code KRB5_LIB_CALL
37krb5_sock_to_principal (krb5_context context,
38			int sock,
39			const char *sname,
40			int32_t type,
41			krb5_principal *ret_princ)
42{
43    krb5_error_code ret;
44    struct sockaddr_storage __ss;
45    struct sockaddr *sa = (struct sockaddr *)&__ss;
46    socklen_t salen = sizeof(__ss);
47    char hostname[NI_MAXHOST];
48
49    if (getsockname (sock, sa, &salen) < 0) {
50	ret = errno;
51	krb5_set_error_message (context, ret, "getsockname: %s", strerror(ret));
52	return ret;
53    }
54    ret = getnameinfo (sa, salen, hostname, sizeof(hostname), NULL, 0, 0);
55    if (ret) {
56	int save_errno = errno;
57	krb5_error_code ret2 = krb5_eai_to_heim_errno(ret, save_errno);
58	krb5_set_error_message (context, ret2, "getnameinfo: %s", gai_strerror(ret));
59	return ret2;
60    }
61
62    ret = krb5_sname_to_principal (context,
63				   hostname,
64				   sname,
65				   type,
66				   ret_princ);
67    return ret;
68}
69