| 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 * |
| 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 |
| 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 |
| 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 |
| 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 */ |