1 #pragma ident	"%Z%%M%	%I%	%E% SMI"
2 /*
3  * lib/krb5/krb/copy_addrs.c
4  *
5  * Copyright 1990 by the Massachusetts Institute of Technology.
6  * All Rights Reserved.
7  *
8  * Export of this software from the United States of America may
9  *   require a specific license from the United States Government.
10  *   It is the responsibility of any person or organization contemplating
11  *   export to obtain such a license before exporting.
12  *
13  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
14  * distribute this software and its documentation for any purpose and
15  * without fee is hereby granted, provided that the above copyright
16  * notice appear in all copies and that both that copyright notice and
17  * this permission notice appear in supporting documentation, and that
18  * the name of M.I.T. not be used in advertising or publicity pertaining
19  * to distribution of the software without specific, written prior
20  * permission.  Furthermore if you modify this software you must label
21  * your software as modified software and not distribute it in such a
22  * fashion that it might be confused with the original M.I.T. software.
23  * M.I.T. makes no representations about the suitability of
24  * this software for any purpose.  It is provided "as is" without express
25  * or implied warranty.
26  *
27  *
28  * krb5_copy_addresses()
29  */
30 
31 #include <k5-int.h>
32 
33 /*ARGSUSED*/
34 krb5_error_code KRB5_CALLCONV
35 krb5_copy_addr(krb5_context context, const krb5_address *inad, krb5_address **outad)
36 {
37     krb5_address *tmpad;
38 
39     if (!(tmpad = (krb5_address *)malloc(sizeof(*tmpad))))
40 	return ENOMEM;
41 #ifdef HAVE_C_STRUCTURE_ASSIGNMENT
42     *tmpad = *inad;
43 #else
44     memcpy(tmpad, inad, sizeof(krb5_address));
45 #endif
46     if (!(tmpad->contents = (krb5_octet *)malloc(inad->length))) {
47 	krb5_xfree(tmpad);
48 	return ENOMEM;
49     }
50     memcpy((char *)tmpad->contents, (char *)inad->contents, inad->length);
51     *outad = tmpad;
52     return 0;
53 }
54 
55 /*
56  * Copy an address array, with fresh allocation.
57  */
58 krb5_error_code KRB5_CALLCONV
59 krb5_copy_addresses(krb5_context context, krb5_address *const *inaddr, krb5_address ***outaddr)
60 {
61     krb5_error_code retval;
62     krb5_address ** tempaddr;
63     register unsigned int nelems = 0;
64 
65     if (!inaddr) {
66 	    *outaddr = 0;
67 	    return 0;
68     }
69 
70     while (inaddr[nelems]) nelems++;
71 
72     /* one more for a null terminated list */
73     if (!(tempaddr = (krb5_address **) calloc(nelems+1, sizeof(*tempaddr))))
74 	return ENOMEM;
75 
76     for (nelems = 0; inaddr[nelems]; nelems++) {
77 	retval = krb5_copy_addr(context, inaddr[nelems], &tempaddr[nelems]);
78         if (retval) {
79 	    krb5_free_addresses(context, tempaddr);
80 	    return retval;
81 	}
82     }
83 
84     *outaddr = tempaddr;
85     return 0;
86 }
87 
88 #if 0
89 /*
90  * Append an address array, to another address array, with fresh allocation.
91  * Note that this function may change the value of *outaddr even if it
92  * returns failure, but it will not change the contents of the list.
93  */
94 krb5_error_code
95 krb5_append_addresses(context, inaddr, outaddr)
96     krb5_context context;
97 	krb5_address * const * inaddr;
98 	krb5_address ***outaddr;
99 {
100     krb5_error_code retval;
101     krb5_address ** tempaddr;
102     krb5_address ** tempaddr2;
103     register unsigned int nelems = 0;
104     register int norigelems = 0;
105 
106     if (!inaddr)
107 	return 0;
108 
109     tempaddr2 = *outaddr;
110 
111     while (inaddr[nelems]) nelems++;
112     while (tempaddr2[norigelems]) norigelems++;
113 
114     tempaddr = (krb5_address **) realloc((char *)*outaddr,
115 		       (nelems + norigelems + 1) * sizeof(*tempaddr));
116     if (!tempaddr)
117 	return ENOMEM;
118 
119     /* The old storage has been freed.  */
120     *outaddr = tempaddr;
121 
122 
123     for (nelems = 0; inaddr[nelems]; nelems++) {
124 	retval = krb5_copy_addr(context, inaddr[nelems],
125 				&tempaddr[norigelems + nelems]);
126 	if (retval)
127 	    goto cleanup;
128     }
129 
130     tempaddr[norigelems + nelems] = 0;
131     return 0;
132 
133   cleanup:
134     while (--nelems >= 0)
135 	krb5_free_address(context, tempaddr[norigelems + nelems]);
136 
137     /* Try to allocate a smaller amount of memory for *outaddr.  */
138     tempaddr = (krb5_address **) realloc((char *)tempaddr,
139 					 (norigelems + 1) * sizeof(*tempaddr));
140     if (tempaddr)
141 	*outaddr = tempaddr;
142     return retval;
143 }
144 #endif
145 
146