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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* files/netmasks.c -- "files" backend for nsswitch "netmasks" database
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* All routines necessary to deal with the file /etc/inet/netmasks. The file
* contains mappings from 32 bit network internet addresses to their
* corresponding 32 bit mask internet addresses. The addresses are in dotted
* internet address form.
*/
#include "files_common.h"
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <nss_dbdefs.h>
#include <ctype.h>
/*
* Validate 'files' netmasks entry. The comparison objects are in IPv4
* internet address format.
*/
static int
check_addr(nss_XbyY_args_t *argp, const char *line, int linelen)
{
const char *limit, *linep, *addrstart;
int addrlen;
char addrbuf[NSS_LINELEN_NETMASKS];
struct in_addr lineaddr, argsaddr;
linep = line;
limit = line + linelen;
/* skip leading spaces */
while (linep < limit && isspace(*linep))
linep++;
addrstart = linep;
while (linep < limit && !isspace(*linep))
linep++;
if (linep == limit)
return (0);
addrlen = linep - addrstart;
if (addrlen < sizeof (addrbuf)) {
(void) memcpy(addrbuf, addrstart, addrlen);
addrbuf[addrlen] = '\0';
if ((lineaddr.s_addr = inet_addr(addrbuf)) ==
(in_addr_t)0xffffffffU)
return (0);
if ((argsaddr.s_addr = inet_addr(argp->key.name))
== (in_addr_t)0xffffffffU)
return (0);
return (lineaddr.s_addr == argsaddr.s_addr);
}
return (0);
}
static nss_status_t
getbynet(be, a)
files_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
nss_status_t res;
char tmpbuf[NSS_LINELEN_NETMASKS];
/*
* use the buffer passed in if result is to be returned
* in /etc file format
*/
if (argp->buf.result != NULL) {
argp->buf.buffer = tmpbuf;
argp->buf.buflen = NSS_LINELEN_NETMASKS;
}
res = _nss_files_XY_all(be, argp, 0, argp->key.name, check_addr);
if (argp->buf.result != NULL) {
argp->buf.buffer = NULL;
argp->buf.buflen = 0;
} else {
/* the frontend expects the netmask data only */
if (res == NSS_SUCCESS) {
char *m;
char *s = (char *)argp->returnval;
int l = 0;
m = s + argp->returnlen - 1;
/* skip trailing spaces */
while (s < m && isspace(*m))
m--;
for (; s <= m; m--) {
if (isspace(*m))
break;
l++;
}
m++;
(void) memmove(argp->returnval, m, l);
argp->returnlen = l;
*(s + l) = '\0';
}
}
return (res);
}
static files_backend_op_t netmasks_ops[] = {
_nss_files_destr,
getbynet
};
/*ARGSUSED*/
nss_backend_t *
_nss_files_netmasks_constr(dummy1, dummy2, dummy3)
const char *dummy1, *dummy2, *dummy3;
{
return (_nss_files_constr(netmasks_ops,
sizeof (netmasks_ops) / sizeof (netmasks_ops[0]),
_PATH_NETMASKS, NSS_LINELEN_NETMASKS, NULL));
}
|
