1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
8
9 #include "../exim.h"
10 #include "lf_functions.h"
11
12 #include <rpcsvc/ypclnt.h>
13
14
15 /*************************************************
16 * Open entry point *
17 *************************************************/
18
19 /* See local README for interface description. This serves for both
20 the "nis" and "nis0" lookup types. */
21
22 static void *
nis_open(const uschar * filename,uschar ** errmsg)23 nis_open(const uschar * filename, uschar ** errmsg)
24 {
25 char *nis_domain;
26 if (yp_get_default_domain(&nis_domain) != 0)
27 {
28 *errmsg = US"failed to get default NIS domain";
29 return NULL;
30 }
31 return nis_domain;
32 }
33
34
35
36 /*************************************************
37 * Find entry point for nis *
38 *************************************************/
39
40 /* See local README for interface description. A separate function is used
41 for nis0 because they are so short it isn't worth trying to use any common
42 code. */
43
44 static int
nis_find(void * handle,const uschar * filename,const uschar * keystring,int length,uschar ** result,uschar ** errmsg,uint * do_cache,const uschar * opts)45 nis_find(void * handle, const uschar * filename, const uschar * keystring,
46 int length, uschar ** result, uschar ** errmsg, uint * do_cache,
47 const uschar * opts)
48 {
49 int rc;
50 uschar *nis_data;
51 int nis_data_length;
52 do_cache = do_cache; /* Placate picky compilers */
53 if ((rc = yp_match(CCS handle, CCS filename, CCS keystring, length,
54 CSS &nis_data, &nis_data_length)) == 0)
55 {
56 *result = string_copy(nis_data);
57 (*result)[nis_data_length] = 0; /* remove final '\n' */
58 return OK;
59 }
60 return (rc == YPERR_KEY || rc == YPERR_MAP)? FAIL : DEFER;
61 }
62
63
64
65 /*************************************************
66 * Find entry point for nis0 *
67 *************************************************/
68
69 /* See local README for interface description. */
70
71 static int
nis0_find(void * handle,const uschar * filename,const uschar * keystring,int length,uschar ** result,uschar ** errmsg,uint * do_cache,const uschar * opts)72 nis0_find(void * handle, const uschar * filename, const uschar * keystring,
73 int length, uschar ** result, uschar ** errmsg, uint * do_cache,
74 const uschar * opts)
75 {
76 int rc;
77 uschar *nis_data;
78 int nis_data_length;
79 do_cache = do_cache; /* Placate picky compilers */
80 if ((rc = yp_match(CCS handle, CCS filename, CCS keystring, length + 1,
81 CSS &nis_data, &nis_data_length)) == 0)
82 {
83 *result = string_copy(nis_data);
84 (*result)[nis_data_length] = 0; /* remove final '\n' */
85 return OK;
86 }
87 return (rc == YPERR_KEY || rc == YPERR_MAP)? FAIL : DEFER;
88 }
89
90
91
92 /*************************************************
93 * Version reporting entry point *
94 *************************************************/
95
96 /* See local README for interface description. */
97
98 #include "../version.h"
99
100 void
nis_version_report(FILE * f)101 nis_version_report(FILE *f)
102 {
103 #ifdef DYNLOOKUP
104 fprintf(f, "Library version: NIS: Exim version %s\n", EXIM_VERSION_STR);
105 #endif
106 }
107
108
109 static lookup_info nis_lookup_info = {
110 .name = US"nis", /* lookup name */
111 .type = 0, /* not abs file, not query style*/
112 .open = nis_open, /* open function */
113 .check = NULL, /* check function */
114 .find = nis_find, /* find function */
115 .close = NULL, /* no close function */
116 .tidy = NULL, /* no tidy function */
117 .quote = NULL, /* no quoting function */
118 .version_report = nis_version_report /* version reporting */
119 };
120
121 static lookup_info nis0_lookup_info = {
122 .name = US"nis0", /* lookup name */
123 .type = 0, /* not absfile, not query style */
124 .open = nis_open, /* sic */ /* open function */
125 .check = NULL, /* check function */
126 .find = nis0_find, /* find function */
127 .close = NULL, /* no close function */
128 .tidy = NULL, /* no tidy function */
129 .quote = NULL, /* no quoting function */
130 .version_report = NULL /* no version reporting (redundant) */
131 };
132
133 #ifdef DYNLOOKUP
134 #define nis_lookup_module_info _lookup_module_info
135 #endif
136
137 static lookup_info *_lookup_list[] = { &nis_lookup_info, &nis0_lookup_info };
138 lookup_module_info nis_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 2 };
139
140 /* End of lookups/nis.c */
141