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
|
/* Copyright (C) 1997-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <hesiod.h>
#include <netdb.h>
#include <netinet/in.h>
#include <nss.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "nss_hesiod.h"
/* Declare a parser for Hesiod protocol entries. Although the format
of the entries is identical to those in /etc/protocols, here is no
predefined parser for us to use. */
#define ENTNAME protoent
struct protoent_data {};
#define TRAILING_LIST_MEMBER p_aliases
#define TRAILING_LIST_SEPARATOR_P isspace
#include <nss/nss_files/files-parse.c>
LINE_PARSER
("#",
STRING_FIELD (result->p_name, isspace, 1);
INT_FIELD (result->p_proto, isspace, 1, 10,);
)
enum nss_status
_nss_hesiod_setprotoent (int stayopen)
{
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_hesiod_endprotoent (void)
{
return NSS_STATUS_SUCCESS;
}
static enum nss_status
lookup (const char *name, const char *type, struct protoent *proto,
char *buffer, size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
size_t linebuflen;
void *context;
char **list, **item;
int parse_res;
int found;
int olderr = errno;
context = _nss_hesiod_init ();
if (context == NULL)
return NSS_STATUS_UNAVAIL;
list = hesiod_resolve (context, name, type);
if (list == NULL)
{
int err = errno;
hesiod_end (context);
__set_errno (olderr);
return err == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL;
}
linebuflen = buffer + buflen - data->linebuffer;
item = list;
found = 0;
do
{
size_t len = strlen (*item) + 1;
if (linebuflen < len)
{
hesiod_free_list (context, list);
hesiod_end (context);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
memcpy (data->linebuffer, *item, len);
parse_res = parse_line (buffer, proto, data, buflen, errnop);
if (parse_res == -1)
{
hesiod_free_list (context, list);
hesiod_end (context);
return NSS_STATUS_TRYAGAIN;
}
if (parse_res > 0)
found = 1;
++item;
}
while (*item != NULL && !found);
hesiod_free_list (context, list);
hesiod_end (context);
if (found == 0)
{
__set_errno (olderr);
return NSS_STATUS_NOTFOUND;
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_hesiod_getprotobyname_r (const char *name, struct protoent *proto,
char *buffer, size_t buflen, int *errnop)
{
return lookup (name, "protocol", proto, buffer, buflen, errnop);
}
enum nss_status
_nss_hesiod_getprotobynumber_r (const int protocol, struct protoent *proto,
char *buffer, size_t buflen, int *errnop)
{
char protostr[21];
snprintf (protostr, sizeof protostr, "%d", protocol);
return lookup (protostr, "protonum", proto, buffer, buflen, errnop);
}
|
