1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/* $TOG: AuGetBest.c /main/24 1998/02/06 14:14:47 kaleb $ */
/*
Copyright 1988, 1998 The Open Group
All Rights Reserved.
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
*/
/* $XFree86: xc/lib/Xau/AuGetBest.c,v 1.3 2000/06/14 00:16:06 dawes Exp $ */
#include <X11/Xauth.h>
#include <X11/Xos.h>
#ifdef XTHREADS
#include <X11/Xthreads.h>
#endif
#ifdef hpux
#define X_INCLUDE_NETDB_H
#define XOS_USE_NO_LOCKING
#include <X11/Xos_r.h>
#endif
static int
binaryEqual (_Xconst char *a, _Xconst char *b, int len)
{
while (len--)
if (*a++ != *b++)
return 0;
return 1;
}
#if NeedFunctionPrototypes
Xauth *
XauGetBestAuthByAddr (
#if NeedWidePrototypes
unsigned int family,
unsigned int address_length,
#else
unsigned short family,
unsigned short address_length,
#endif
_Xconst char* address,
#if NeedWidePrototypes
unsigned int number_length,
#else
unsigned short number_length,
#endif
_Xconst char* number,
int types_length,
char** types,
_Xconst int* type_lengths)
#else
Xauth *
XauGetBestAuthByAddr (family, address_length, address,
number_length, number,
types_length, types, type_lengths)
unsigned short family;
unsigned short address_length;
char *address;
unsigned short number_length;
char *number;
int types_length;
char **types;
int *type_lengths;
#endif
{
FILE *auth_file;
char *auth_name;
Xauth *entry;
Xauth *best;
int best_type;
int type;
#ifdef hpux
char *fully_qual_address;
unsigned short fully_qual_address_length;
#endif
auth_name = XauFileName ();
if (!auth_name)
return 0;
if (access (auth_name, R_OK) != 0) /* checks REAL id */
return 0;
auth_file = fopen (auth_name, "rb");
if (!auth_file)
return 0;
#ifdef hpux
if (family == FamilyLocal) {
_Xgethostbynameparams hparams;
struct hostent *hostp;
/* make sure we try fully-qualified hostname */
if ((hostp = _XGethostbyname(address,hparams)) != NULL) {
fully_qual_address = hostp->h_name;
fully_qual_address_length = strlen(fully_qual_address);
}
else
{
fully_qual_address = NULL;
fully_qual_address_length = 0;
}
}
#endif /* hpux */
best = 0;
best_type = types_length;
for (;;) {
entry = XauReadAuth (auth_file);
if (!entry)
break;
/*
* Match when:
* either family or entry->family are FamilyWild or
* family and entry->family are the same and
* address and entry->address are the same
* and
* either number or entry->number are empty or
* number and entry->number are the same
* and
* either name or entry->name are empty or
* name and entry->name are the same
*/
if ((family == FamilyWild || entry->family == FamilyWild ||
(entry->family == family &&
((address_length == entry->address_length &&
binaryEqual (entry->address, address, (int)address_length))
#ifdef hpux
|| (family == FamilyLocal &&
fully_qual_address_length == entry->address_length &&
binaryEqual (entry->address, fully_qual_address,
(int) fully_qual_address_length))
#endif
))) &&
(number_length == 0 || entry->number_length == 0 ||
(number_length == entry->number_length &&
binaryEqual (entry->number, number, (int)number_length))))
{
if (best_type == 0)
{
best = entry;
break;
}
for (type = 0; type < best_type; type++)
if (type_lengths[type] == entry->name_length &&
!(strncmp (types[type], entry->name, entry->name_length)))
{
break;
}
if (type < best_type)
{
if (best)
XauDisposeAuth (best);
best = entry;
best_type = type;
if (type == 0)
break;
continue;
}
}
XauDisposeAuth (entry);
}
(void) fclose (auth_file);
return best;
}
|
