1/*	$NetBSD: sock_principal.c,v 1.2 2017/01/28 21:31:49 christos Exp $	*/
2
3/*
4 * Copyright (c) 1997 - 2001 Kungliga Tekniska H��gskolan
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_error_code KRB5_LIB_CALL
39krb5_sock_to_principal (krb5_context context,
40			int sock,
41			const char *sname,
42			int32_t type,
43			krb5_principal *ret_princ)
44{
45    krb5_error_code ret;
46    struct sockaddr_storage __ss;
47    struct sockaddr *sa = (struct sockaddr *)&__ss;
48    socklen_t salen = sizeof(__ss);
49    char hostname[NI_MAXHOST];
50
51    if (getsockname (sock, sa, &salen) < 0) {
52	ret = errno;
53	krb5_set_error_message (context, ret, "getsockname: %s", strerror(ret));
54	return ret;
55    }
56    ret = getnameinfo (sa, salen, hostname, sizeof(hostname), NULL, 0, 0);
57    if (ret) {
58	int save_errno = errno;
59	krb5_error_code ret2 = krb5_eai_to_heim_errno(ret, save_errno);
60	krb5_set_error_message (context, ret2, "getnameinfo: %s", gai_strerror(ret));
61	return ret2;
62    }
63
64    ret = krb5_sname_to_principal (context,
65				   hostname,
66				   sname,
67				   type,
68				   ret_princ);
69    return ret;
70}
71