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 extern char *strdup (const char *);
  11
  12 #include "ldap-int.h"
  13 #include "ldapconfig.h"
  14
  15 struct ldapoptions openldap_ldap_global_options;
  16
  17 #undef gopts
  18 #define gopts openldap_ldap_global_options
  19
  20 int     openldap_ldap_initialized = 0;
  21
  22 #define ATTR_NONE       0
  23 #define ATTR_BOOL       1
  24 #define ATTR_INT        2
  25 #define ATTR_KV         3
  26 #define ATTR_STRING     4
  27
  28 struct ol_keyvalue {
  29         char*           key;
  30         int                     value;
  31 };
  32
  33 static struct ol_keyvalue deref_kv[] = {
  34         {"never", LDAP_DEREF_NEVER},
  35         {"searching", LDAP_DEREF_SEARCHING},
  36         {"finding", LDAP_DEREF_FINDING},
  37         {"always", LDAP_DEREF_ALWAYS},
  38         {NULL, 0}
  39 };
  40
  41 static struct ol_attribute {
  42         int                     type;
  43         char*           name;
  44         void*           data;
  45         size_t          offset;
  46 } attrs[] = {
  47         {ATTR_KV,               "DEREF",        deref_kv, /* or &deref_kv[0] */
  48                 offsetof(struct ldapoptions, ldo_deref)},
  49         {ATTR_INT,              "SIZELIMIT",    NULL,
  50                 offsetof(struct ldapoptions, ldo_sizelimit)},
  51         {ATTR_INT,              "TIMELIMIT",    NULL,
  52                 offsetof(struct ldapoptions, ldo_timelimit)},
  53         {ATTR_STRING,   "BASE",                 NULL,
  54                 offsetof(struct ldapoptions, ldo_defbase)},
  55         {ATTR_STRING,   "HOST",                 NULL,
  56                 offsetof(struct ldapoptions, ldo_defhost)},
  57         {ATTR_INT,              "PORT",                 NULL,
  58                 offsetof(struct ldapoptions, ldo_defport)},
  59         {ATTR_BOOL,             "REFERRALS",    (void *) LDAP_BOOL_REFERRALS, 0},
  60         {ATTR_BOOL,             "RESTART",              (void *) LDAP_BOOL_RESTART, 0},
  61         {ATTR_BOOL,             "DNS",                  (void *) LDAP_BOOL_DNS, 0},
  62         {ATTR_NONE,             NULL,           NULL,   0}
  63 };
  64
  65 #define MAX_LDAP_ATTR_LEN  sizeof("SIZELIMIT")
  66 #define MAX_LDAP_ENV_PREFIX_LEN 8
  67
  68 static void openldap_ldap_init_w_conf(const char *file)
  69 {
  70         char linebuf[128];
  71         FILE *fp;
  72         int i;
  73         char *cmd, *opt;
  74         char *start, *end;
  75
  76         fp = fopen(file, "r");
  77         if(fp == NULL) {
  78                 /* could not open file */
  79                 return;
  80         }
  81
  82         while((start = fgets(linebuf, sizeof(linebuf), fp)) != NULL) {
  83                 /* skip lines starting with '#' */
  84                 if(*start == '#') continue;
  85
  86                 /* trim leading white space */
  87                 while((*start != '\0') && isspace(*start)) start++;
  88
  89                 /* anything left? */
  90                 if(*start == '\0') continue;
  91
  92                 /* trim trailing white space */
  93                 end = &start[strlen(start)-1];
  94                 while(isspace(*end)) end--;
  95                 end[1] = '\0';
  96
  97                 /* anything left? */
  98                 if(*start == '\0') continue;
  99
 100
 101                 /* parse the command */
 102                 cmd=start;
 103                 while((*start != '\0') && !isspace(*start)) {
 104                         start++;
 105                 }
 106                 if(*start == '\0') {
 107                         /* command has no argument */
 108                         continue;
 109                 }
 110
 111                 *start++ = '\0';
 112
 113                 /* we must have some non-whitespace to skip */
 114                 while(isspace(*start)) start++;
 115                 opt = start;
 116
 117                 for(i=0; attrs[i].type != ATTR_NONE; i++) {
 118                         void *p;
 119
 120                         if(strcasecmp(cmd, attrs[i].name) != 0) {
 121                                 continue;
 122                         }
 123
 124                         p = &((char *) &gopts)[attrs[i].offset];
 125
 126                         switch(attrs[i].type) {
 127                         case ATTR_BOOL:
 128                                 if((strcasecmp(opt, "on") == 0)
 129                                         || (strcasecmp(opt, "yes") == 0)
 130                                         || (strcasecmp(opt, "true") == 0))
 131                                 {
 132                                         LDAP_BOOL_SET(&gopts, (int) attrs[i].data);
 133
 134                                 } else {
 135                                         LDAP_BOOL_CLR(&gopts, (int) attrs[i].data);
 136                                 }
 137
 138                                 break;
 139
 140                         case ATTR_INT:
 141                                 * (int*) p = atoi(opt);
 142                                 break;
 143
 144                         case ATTR_KV: {
 145                                         struct ol_keyvalue *kv;
 146
 147                                         for(kv = (struct ol_keyvalue *) attrs[i].data;
 148                                                 kv->key != NULL;
 149                                                 kv++) {
 150
 151                                                 if(strcasecmp(opt, kv->key) == 0) {
 152                                                         * (int*) p = kv->value;
 153                                                         break;
 154                                                 }
 155                                         }
 156                                 } break;
 157
 158                         case ATTR_STRING:
 159                                 if (* (char**) p != NULL) free(* (char**) p);
 160                                 * (char**) p = strdup(opt);
 161                                 break;
 162                         }
 163                 }
 164         }
 165 }
 166
 167 static void openldap_ldap_init_w_userconf(const char *file)
 168 {
 169         char *home = getenv("HOME");
 170         char *path;
 171
 172         if (home != NULL) {
 173                 path = malloc(strlen(home) + strlen(file) + 3);
 174         } else {
 175                 path = malloc(strlen(file) + 3);
 176         }
 177
 178
 179         if(home != NULL && path != NULL) {
 180                 /* try ~/file */
 181                 sprintf(path, "%s/%s", home, file);
 182                 openldap_ldap_init_w_conf(path);
 183
 184                 /* try ~/.file */
 185                 sprintf(path, "%s/.%s", home, file);
 186                 openldap_ldap_init_w_conf(path);
 187         }
 188
 189         /* try file */
 190         openldap_ldap_init_w_conf(file);
 191
 192         if(path == NULL) {
 193                 /* try .file */
 194                 sprintf(path, ".%s", file);
 195                 openldap_ldap_init_w_conf(path);
 196         }
 197 }
 198
 199 static void openldap_ldap_init_w_env(const char *prefix)
 200 {
 201         char buf[MAX_LDAP_ATTR_LEN+MAX_LDAP_ENV_PREFIX_LEN];
 202         int len;
 203         int i;
 204         void *p;
 205         char *value;
 206
 207         if (prefix == NULL) {
 208                 prefix = DEFAULT_LDAP_ENV_PREFIX;
 209         }
 210
 211         strncpy(buf, prefix, MAX_LDAP_ENV_PREFIX_LEN);
 212         buf[MAX_LDAP_ENV_PREFIX_LEN] = '\0';
 213         len = strlen(buf);
 214
 215         for(i=0; attrs[i].type != ATTR_NONE; i++) {
 216                 strcpy(&buf[len], attrs[i].name);
 217                 value = getenv(buf);
 218
 219                 if(value == NULL) {
 220                         continue;
 221                 }
 222
 223                 p = &((char *) &gopts)[attrs[i].offset];
 224
 225                 switch(attrs[i].type) {
 226                 case ATTR_BOOL:
 227                         if((strcasecmp(value, "on") == 0)
 228                                 || (strcasecmp(value, "yes") == 0)
 229                                 || (strcasecmp(value, "true") == 0))
 230                         {
 231                                 LDAP_BOOL_SET(&gopts, (int) attrs[i].data);
 232
 233                         } else {
 234                                 LDAP_BOOL_CLR(&gopts, (int) attrs[i].data);
 235                         }
 236                         break;
 237
 238                 case ATTR_INT:
 239                         * (int*) p = atoi(value);
 240                         break;
 241
 242                 case ATTR_KV: {
 243                                 struct ol_keyvalue *kv;
 244
 245                                 for(kv = (struct ol_keyvalue *) attrs[i].data;
 246                                         kv->key != NULL;
 247                                         kv++) {
 248
 249                                         if(strcasecmp(value, kv->key) == 0) {
 250                                                 * (int*) p = kv->value;
 251                                                 break;
 252                                         }
 253                                 }
 254                         } break;
 255
 256                 case ATTR_STRING:
 257                         if (* (char**) p != NULL) free(* (char**) p);
 258                         if (*value == '\0') {
 259                                 * (char**) p = NULL;
 260                         } else {
 261                                 * (char**) p = strdup(value);
 262                         }
 263                         break;
 264                 }
 265         }
 266 }
 267
 268 void openldap_ldap_initialize( void )
 269 {
 270         if ( openldap_ldap_initialized ) {
 271                 return;
 272         }
 273
 274         gopts.ldo_version =     LDAP_VERSION2;
 275         gopts.ldo_deref =       LDAP_DEREF_NEVER;
 276         gopts.ldo_timelimit = LDAP_NO_LIMIT;
 277         gopts.ldo_sizelimit = LDAP_NO_LIMIT;
 278
 279         gopts.ldo_defhost = strdup("localhost");
 280         gopts.ldo_defport = LDAP_PORT;
 281
 282         gopts.ldo_refhoplimit = LDAP_DEFAULT_REFHOPLIMIT;
 283
 284         LDAP_BOOL_ZERO(&gopts);
 285
 286 #if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS ) || \
 287         LDAP_VERSION_MAX > LDAP_VERSION2
 288         LDAP_BOOL_SET(&gopts, LDAP_BOOL_REFERRALS);
 289 #endif
 290
 291         openldap_ldap_init_w_conf(DEFAULT_LDAP_CONF_FILE);
 292         openldap_ldap_init_w_userconf(DEFAULT_LDAP_USERRC_FILE);
 293         openldap_ldap_init_w_env(NULL);
 294
 295         openldap_ldap_initialized = 1;
 296 }