port2ip.c revision 7934:6aeeafc994de 
1/*
2 * lib/krb5/os/port2ip.c
3 *
4 * Copyright 1991 by the Massachusetts Institute of Technology.
5 * All Rights Reserved.
6 *
7 * Export of this software from the United States of America may
8 *   require a specific license from the United States Government.
9 *   It is the responsibility of any person or organization contemplating
10 *   export to obtain such a license before exporting.
11 *
12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
13 * distribute this software and its documentation for any purpose and
14 * without fee is hereby granted, provided that the above copyright
15 * notice appear in all copies and that both that copyright notice and
16 * this permission notice appear in supporting documentation, and that
17 * the name of M.I.T. not be used in advertising or publicity pertaining
18 * to distribution of the software without specific, written prior
19 * permission.  Furthermore if you modify this software you must label
20 * your software as modified software and not distribute it in such a
21 * fashion that it might be confused with the original M.I.T. software.
22 * M.I.T. makes no representations about the suitability of
23 * this software for any purpose.  It is provided "as is" without express
24 * or implied warranty.
25 *
26 *
27 * Take an ADDRPORT address and split into IP addr & port.
28 */
29
30#include "k5-int.h"
31
32#ifdef HAVE_NETINET_IN_H
33#include "os-proto.h"
34
35/*ARGSUSED*/
36krb5_error_code
37krb5_unpack_full_ipaddr(krb5_context context, const krb5_address *inaddr, krb5_int32 *adr, krb5_int16 *port)
38{
39    unsigned long smushaddr;
40    unsigned short smushport;
41    register krb5_octet *marshal;
42    krb5_addrtype temptype;
43    krb5_ui_4 templength;
44
45    if (inaddr->addrtype != ADDRTYPE_ADDRPORT)
46	return KRB5_PROG_ATYPE_NOSUPP;
47
48    if (inaddr->length != sizeof(smushaddr)+ sizeof(smushport) +
49	2*sizeof(temptype) + 2*sizeof(templength))
50	return KRB5_PROG_ATYPE_NOSUPP;
51
52    marshal = inaddr->contents;
53
54    (void) memcpy((char *)&temptype, (char *)marshal, sizeof(temptype));
55    marshal += sizeof(temptype);
56    if (temptype != htons(ADDRTYPE_INET))
57	return KRB5_PROG_ATYPE_NOSUPP;
58
59    (void) memcpy((char *)&templength, (char *)marshal, sizeof(templength));
60    marshal += sizeof(templength);
61    if (templength != htonl(sizeof(smushaddr)))
62	return KRB5_PROG_ATYPE_NOSUPP;
63
64    (void) memcpy((char *)&smushaddr, (char *)marshal, sizeof(smushaddr));
65    /* leave in net order */
66    marshal += sizeof(smushaddr);
67
68    (void) memcpy((char *)&temptype, (char *)marshal, sizeof(temptype));
69    marshal += sizeof(temptype);
70    if (temptype != htons(ADDRTYPE_IPPORT))
71	return KRB5_PROG_ATYPE_NOSUPP;
72
73    (void) memcpy((char *)&templength, (char *)marshal, sizeof(templength));
74    marshal += sizeof(templength);
75    if (templength != htonl(sizeof(smushport)))
76	return KRB5_PROG_ATYPE_NOSUPP;
77
78    (void) memcpy((char *)&smushport, (char *)marshal, sizeof(smushport));
79    /* leave in net order */
80
81    *adr = (krb5_int32) smushaddr;
82    *port = (krb5_int16) smushport;
83    return 0;
84}
85#endif
86