git.sur5r.net Git - openldap/blob - libraries/libldap/init.c

   1 #include "portable.h"
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 #include <ac/socket.h>
   7 #include <ac/string.h>
   8 #include <ac/ctype.h>
   9 #include <ac/time.h>
  10
  11 #include "ldap-int.h"
  12 #include "ldapconfig.h"
  13
  14 struct ldapoptions openldap_ldap_global_options;
  15
  16 #undef gopts
  17 #define gopts openldap_ldap_global_options
  18
  19 int     openldap_ldap_initialized = 0;
  20
  21 #define ATTR_NONE       0
  22 #define ATTR_BOOL       1
  23 #define ATTR_INT        2
  24 #define ATTR_KV         3
  25 #define ATTR_STRING     4
  26
  27 struct ol_keyvalue {
  28         char*           key;
  29         int                     value;
  30 };
  31
  32 static struct ol_keyvalue deref_kv[] = {
  33         {"never", LDAP_DEREF_NEVER},
  34         {"searching", LDAP_DEREF_SEARCHING},
  35         {"finding", LDAP_DEREF_FINDING},
  36         {"always", LDAP_DEREF_ALWAYS},
  37         {NULL, 0}
  38 };
  39
  40 static struct ol_attribute {
  41         int                     type;
  42         char*           name;
  43         void*           data;
  44         size_t          offset;
  45 } attrs[] = {
  46         {ATTR_KV,               "DEREF",        deref_kv, /* or &deref_kv[0] */
  47                 offsetof(struct ldapoptions, ldo_deref)},
  48         {ATTR_INT,              "SIZELIMIT",    NULL,
  49                 offsetof(struct ldapoptions, ldo_sizelimit)},
  50         {ATTR_INT,              "TIMELIMIT",    NULL,
  51                 offsetof(struct ldapoptions, ldo_timelimit)},
  52         {ATTR_STRING,   "BASE",                 NULL,
  53                 offsetof(struct ldapoptions, ldo_defbase)},
  54         {ATTR_STRING,   "HOST",                 NULL,
  55                 offsetof(struct ldapoptions, ldo_defhost)},
  56         {ATTR_INT,              "PORT",                 NULL,
  57                 offsetof(struct ldapoptions, ldo_defport)},
  58         {ATTR_BOOL,             "REFERRALS",    (void *) LDAP_BOOL_REFERRALS, 0},
  59         {ATTR_BOOL,             "RESTART",              (void *) LDAP_BOOL_RESTART, 0},
  60         {ATTR_BOOL,             "DNS",                  (void *) LDAP_BOOL_DNS, 0},
  61         {ATTR_NONE,             NULL,           NULL,   0}
  62 };
  63
  64 #define MAX_LDAP_ATTR_LEN  sizeof("SIZELIMIT")
  65 #define MAX_LDAP_ENV_PREFIX_LEN 8
  66
  67 static void openldap_ldap_init_w_conf(const char *file)
  68 {
  69         char linebuf[128];
  70         FILE *fp;
  71         int i;
  72         char *cmd, *opt;
  73         char *start, *end;
  74
  75         fp = fopen(file, "r");
  76         if(fp == NULL) {
  77                 /* could not open file */
  78                 return;
  79         }
  80
  81         while((start = fgets(linebuf, sizeof(linebuf), fp)) != NULL) {
  82                 /* skip lines starting with '#' */
  83                 if(*start == '#') continue;
  84
  85                 /* trim leading white space */
  86                 while((*start != '\0') && isspace(*start)) start++;
  87
  88                 /* anything left? */
  89                 if(*start == '\0') continue;
  90
  91                 /* trim trailing white space */
  92                 end = &start[strlen(start)-1];
  93                 while(isspace(*end)) end--;
  94                 end[1] = '\0';
  95
  96                 /* anything left? */
  97                 if(*start == '\0') continue;
  98
  99
 100                 /* parse the command */
 101                 cmd=start;
 102                 while((*start != '\0') && !isspace(*start)) {
 103                         start++;
 104                 }
 105                 if(*start == '\0') {
 106                         /* command has no argument */
 107                         continue;
 108                 }
 109
 110                 *start++ = '\0';
 111
 112                 /* we must have some non-whitespace to skip */
 113                 while(isspace(*start)) start++;
 114                 opt = start;
 115
 116                 for(i=0; attrs[i].type != ATTR_NONE; i++) {
 117                         void *p;
 118
 119                         if(strcasecmp(cmd, attrs[i].name) != 0) {
 120                                 continue;
 121                         }
 122
 123                         p = &((char *) &gopts)[attrs[i].offset];
 124
 125                         switch(attrs[i].type) {
 126                         case ATTR_BOOL:
 127                                 if((strcasecmp(opt, "on") == 0)
 128                                         || (strcasecmp(opt, "yes") == 0)
 129                                         || (strcasecmp(opt, "true") == 0))
 130                                 {
 131                                         LDAP_BOOL_SET(&gopts, (int) attrs[i].data);
 132
 133                                 } else {
 134                                         LDAP_BOOL_CLR(&gopts, (int) attrs[i].data);
 135                                 }
 136
 137                                 break;
 138
 139                         case ATTR_INT:
 140                                 * (int*) p = atoi(opt);
 141                                 break;
 142
 143                         case ATTR_KV: {
 144                                         struct ol_keyvalue *kv;
 145
 146                                         for(kv = (struct ol_keyvalue *) attrs[i].data;
 147                                                 kv->key != NULL;
 148                                                 kv++) {
 149
 150                                                 if(strcasecmp(opt, kv->key) == 0) {
 151                                                         * (int*) p = kv->value;
 152                                                         break;
 153                                                 }
 154                                         }
 155                                 } break;
 156
 157                         case ATTR_STRING:
 158                                 if (* (char**) p != NULL) free(* (char**) p);
 159                                 * (char**) p = strdup(opt);
 160                                 break;
 161                         }
 162                 }
 163         }
 164 }
 165
 166 static void openldap_ldap_init_w_userconf(const char *file)
 167 {
 168         char *home = getenv("HOME");
 169         char *path;
 170
 171         if (home != NULL) {
 172                 path = malloc(strlen(home) + strlen(file) + 3);
 173         } else {
 174                 path = malloc(strlen(file) + 3);
 175         }
 176
 177
 178         if(home != NULL && path != NULL) {
 179                 /* try ~/file */
 180                 sprintf(path, "%s/%s", home, file);
 181                 openldap_ldap_init_w_conf(path);
 182
 183                 /* try ~/.file */
 184                 sprintf(path, "%s/.%s", home, file);
 185                 openldap_ldap_init_w_conf(path);
 186         }
 187
 188         /* try file */
 189         openldap_ldap_init_w_conf(file);
 190
 191         if(path == NULL) {
 192                 /* try .file */
 193                 sprintf(path, ".%s", file);
 194                 openldap_ldap_init_w_conf(path);
 195         }
 196 }
 197
 198 static void openldap_ldap_init_w_env(const char *prefix)
 199 {
 200         char buf[MAX_LDAP_ATTR_LEN+MAX_LDAP_ENV_PREFIX_LEN];
 201         int len;
 202         int i;
 203         void *p;
 204         char *value;
 205
 206         if (prefix == NULL) {
 207                 prefix = DEFAULT_LDAP_ENV_PREFIX;
 208         }
 209
 210         strncpy(buf, prefix, MAX_LDAP_ENV_PREFIX_LEN);
 211         buf[MAX_LDAP_ENV_PREFIX_LEN] = '\0';
 212         len = strlen(buf);
 213
 214         for(i=0; attrs[i].type != ATTR_NONE; i++) {
 215                 strcpy(&buf[len], attrs[i].name);
 216                 value = getenv(buf);
 217
 218                 if(value == NULL) {
 219                         continue;
 220                 }
 221
 222                 p = &((char *) &gopts)[attrs[i].offset];
 223
 224                 switch(attrs[i].type) {
 225                 case ATTR_BOOL:
 226                         if((strcasecmp(value, "on") == 0)
 227                                 || (strcasecmp(value, "yes") == 0)
 228                                 || (strcasecmp(value, "true") == 0))
 229                         {
 230                                 LDAP_BOOL_SET(&gopts, (int) attrs[i].data);
 231
 232                         } else {
 233                                 LDAP_BOOL_CLR(&gopts, (int) attrs[i].data);
 234                         }
 235                         break;
 236
 237                 case ATTR_INT:
 238                         * (int*) p = atoi(value);
 239                         break;
 240
 241                 case ATTR_KV: {
 242                                 struct ol_keyvalue *kv;
 243
 244                                 for(kv = (struct ol_keyvalue *) attrs[i].data;
 245                                         kv->key != NULL;
 246                                         kv++) {
 247
 248                                         if(strcasecmp(value, kv->key) == 0) {
 249                                                 * (int*) p = kv->value;
 250                                                 break;
 251                                         }
 252                                 }
 253                         } break;
 254
 255                 case ATTR_STRING:
 256                         if (* (char**) p != NULL) free(* (char**) p);
 257                         if (*value == '\0') {
 258                                 * (char**) p = NULL;
 259                         } else {
 260                                 * (char**) p = strdup(value);
 261                         }
 262                         break;
 263                 }
 264         }
 265 }
 266
 267 void openldap_ldap_initialize( void )
 268 {
 269         if ( openldap_ldap_initialized ) {
 270                 return;
 271         }
 272
 273         gopts.ldo_version =     LDAP_VERSION2;
 274         gopts.ldo_deref =       LDAP_DEREF_NEVER;
 275         gopts.ldo_timelimit = LDAP_NO_LIMIT;
 276         gopts.ldo_sizelimit = LDAP_NO_LIMIT;
 277
 278         gopts.ldo_defhost = strdup("localhost");
 279         gopts.ldo_defport = LDAP_PORT;
 280
 281         gopts.ldo_refhoplimit = LDAP_DEFAULT_REFHOPLIMIT;
 282
 283         LDAP_BOOL_ZERO(&gopts);
 284
 285 #if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS ) || \
 286         LDAP_VERSION_MAX > LDAP_VERSION2
 287         LDAP_BOOL_SET(&gopts, LDAP_BOOL_REFERRALS);
 288 #endif
 289
 290         openldap_ldap_init_w_conf(DEFAULT_LDAP_CONF_FILE);
 291         openldap_ldap_init_w_userconf(DEFAULT_LDAP_USERRC_FILE);
 292         openldap_ldap_init_w_env(NULL);
 293
 294         openldap_ldap_initialized = 1;
 295 }