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d614a753 | 1 | /* Copyright (C) 1997-2020 Free Software Foundation, Inc. |
2f54c82d UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
2f54c82d UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
2f54c82d | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
2f54c82d UD |
18 | |
19 | #include <errno.h> | |
20 | #include <hesiod.h> | |
21 | #include <netdb.h> | |
22 | #include <netinet/in.h> | |
23 | #include <nss.h> | |
24 | #include <stdio.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | ||
2f54c82d UD |
28 | /* Declare a parser for Hesiod protocol entries. Although the format |
29 | of the entries is identical to those in /etc/protocols, here is no | |
30 | predefined parser for us to use. */ | |
31 | ||
32 | #define ENTNAME protoent | |
33 | ||
34 | struct protoent_data {}; | |
35 | ||
36 | #define TRAILING_LIST_MEMBER p_aliases | |
37 | #define TRAILING_LIST_SEPARATOR_P isspace | |
38 | #include <nss/nss_files/files-parse.c> | |
39 | LINE_PARSER | |
40 | ("#", | |
41 | STRING_FIELD (result->p_name, isspace, 1); | |
42 | INT_FIELD (result->p_proto, isspace, 1, 10,); | |
43 | ) | |
44 | ||
45 | enum nss_status | |
51eecc4a | 46 | _nss_hesiod_setprotoent (int stayopen) |
2f54c82d UD |
47 | { |
48 | return NSS_STATUS_SUCCESS; | |
49 | } | |
50 | ||
51 | enum nss_status | |
52 | _nss_hesiod_endprotoent (void) | |
53 | { | |
54 | return NSS_STATUS_SUCCESS; | |
55 | } | |
56 | ||
57 | static enum nss_status | |
58 | lookup (const char *name, const char *type, struct protoent *proto, | |
59 | char *buffer, size_t buflen, int *errnop) | |
60 | { | |
61 | struct parser_data *data = (void *) buffer; | |
62 | size_t linebuflen; | |
63 | void *context; | |
64 | char **list, **item; | |
65 | int parse_res; | |
66 | int found; | |
34816665 | 67 | int olderr = errno; |
2f54c82d | 68 | |
5018f16c | 69 | if (hesiod_init (&context) < 0) |
2f54c82d UD |
70 | return NSS_STATUS_UNAVAIL; |
71 | ||
72 | list = hesiod_resolve (context, name, type); | |
73 | if (list == NULL) | |
74 | { | |
34816665 | 75 | int err = errno; |
2f54c82d | 76 | hesiod_end (context); |
34816665 UD |
77 | __set_errno (olderr); |
78 | return err == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL; | |
2f54c82d UD |
79 | } |
80 | ||
81 | linebuflen = buffer + buflen - data->linebuffer; | |
82 | ||
83 | item = list; | |
84 | found = 0; | |
85 | do | |
86 | { | |
87 | size_t len = strlen (*item) + 1; | |
88 | ||
89 | if (linebuflen < len) | |
90 | { | |
91 | hesiod_free_list (context, list); | |
92 | hesiod_end (context); | |
93 | *errnop = ERANGE; | |
94 | return NSS_STATUS_TRYAGAIN; | |
95 | } | |
96 | ||
97 | memcpy (data->linebuffer, *item, len); | |
98 | ||
99 | parse_res = parse_line (buffer, proto, data, buflen, errnop); | |
100 | if (parse_res == -1) | |
101 | { | |
102 | hesiod_free_list (context, list); | |
103 | hesiod_end (context); | |
104 | return NSS_STATUS_TRYAGAIN; | |
105 | } | |
106 | ||
107 | if (parse_res > 0) | |
108 | found = 1; | |
109 | ||
110 | ++item; | |
111 | } | |
112 | while (*item != NULL && !found); | |
113 | ||
114 | hesiod_free_list (context, list); | |
115 | hesiod_end (context); | |
116 | ||
34816665 UD |
117 | if (found == 0) |
118 | { | |
119 | __set_errno (olderr); | |
120 | return NSS_STATUS_NOTFOUND; | |
121 | } | |
122 | ||
123 | return NSS_STATUS_SUCCESS; | |
2f54c82d UD |
124 | } |
125 | ||
126 | enum nss_status | |
127 | _nss_hesiod_getprotobyname_r (const char *name, struct protoent *proto, | |
128 | char *buffer, size_t buflen, int *errnop) | |
129 | { | |
130 | return lookup (name, "protocol", proto, buffer, buflen, errnop); | |
131 | } | |
132 | ||
133 | enum nss_status | |
134 | _nss_hesiod_getprotobynumber_r (const int protocol, struct protoent *proto, | |
135 | char *buffer, size_t buflen, int *errnop) | |
136 | { | |
137 | char protostr[21]; | |
138 | ||
139 | snprintf (protostr, sizeof protostr, "%d", protocol); | |
140 | ||
141 | return lookup (protostr, "protonum", proto, buffer, buflen, errnop); | |
142 | } |