source4/dns_server/dlz_minimal.h

   1 /*
   2  * Copyright (C) 2010 Andrew Tridgell
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the
   6  * above copyright notice and this permission notice appear in all
   7  * copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR
  10  * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
  11  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
  12  * THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
  13  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
  14  * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  15  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
  16  * USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 /* This header is updated based on BIND 9.10.1 source.
  20  *    contrib/dlz/modules/include/dlz_minimal.h
  21  */
  22
  23 #ifndef DLZ_MINIMAL_H
  24 #define DLZ_MINIMAL_H 1
  25
  26 #if defined (BIND_VERSION_9_8)
  27 # define DLZ_DLOPEN_VERSION 1
  28 #elif defined (BIND_VERSION_9_9)
  29 # define DLZ_DLOPEN_VERSION 2
  30 #elif defined (BIND_VERSION_9_10)
  31 # define DLZ_DLOPEN_VERSION 3
  32 # define DLZ_DLOPEN_AGE 0
  33 #else
  34 # error Unsupported BIND version
  35 #endif
  36
  37 typedef unsigned int isc_result_t;
  38 #if DLZ_DLOPEN_VERSION == 1
  39 typedef bool isc_boolean_t;
  40 #else
  41 typedef int isc_boolean_t;
  42 #endif
  43 typedef uint32_t dns_ttl_t;
  44
  45 /* return these in flags from dlz_version() */
  46 #define DNS_SDLZFLAG_THREADSAFE         0x00000001U
  47 #define DNS_SDLZFLAG_RELATIVEOWNER      0x00000002U
  48 #define DNS_SDLZFLAG_RELATIVERDATA      0x00000004U
  49
  50 /* result codes */
  51 #define ISC_R_SUCCESS                   0
  52 #define ISC_R_NOMEMORY                  1
  53 #define ISC_R_NOPERM                    6
  54 #define ISC_R_NOSPACE                   19
  55 #define ISC_R_NOTFOUND                  23
  56 #define ISC_R_FAILURE                   25
  57 #define ISC_R_NOTIMPLEMENTED            27
  58 #define ISC_R_NOMORE                    29
  59 #define ISC_R_INVALIDFILE               30
  60 #define ISC_R_UNEXPECTED                34
  61 #define ISC_R_FILENOTFOUND              38
  62
  63 /* boolean values */
  64 #define ISC_TRUE        1
  65 #define ISC_FALSE       0
  66
  67 /* log levels */
  68 #define ISC_LOG_INFO            (-1)
  69 #define ISC_LOG_NOTICE          (-2)
  70 #define ISC_LOG_WARNING         (-3)
  71 #define ISC_LOG_ERROR           (-4)
  72 #define ISC_LOG_CRITICAL        (-5)
  73 #define ISC_LOG_DEBUG(level)    (level)
  74
  75 /* opaque structures */
  76 typedef void *dns_sdlzlookup_t;
  77 typedef void *dns_sdlzallnodes_t;
  78 typedef void *dns_view_t;
  79 typedef void *dns_dlzdb_t;
  80
  81 #if DLZ_DLOPEN_VERSION > 1
  82 /*
  83  * Method and type definitions needed for retrieval of client info
  84  * from the caller.
  85  */
  86 typedef struct isc_sockaddr {
  87         union {
  88                 struct sockaddr         sa;
  89                 struct sockaddr_in      sin;
  90                 struct sockaddr_in6     sin6;
  91                 struct sockaddr_un      sunix;
  92         }                               type;
  93         unsigned int                    length;
  94         void *                          link;
  95 } isc_sockaddr_t;
  96
  97 #define DNS_CLIENTINFO_VERSION 1
  98 typedef struct dns_clientinfo {
  99         uint16_t version;
 100         void *data;
 101 } dns_clientinfo_t;
 102
 103 typedef isc_result_t (*dns_clientinfo_sourceip_t)(dns_clientinfo_t *client,
 104                                                   isc_sockaddr_t **addrp);
 105
 106 #define DNS_CLIENTINFOMETHODS_VERSION 1
 107 #define DNS_CLIENTINFOMETHODS_AGE 0
 108
 109 typedef struct dns_clientinfomethods {
 110         uint16_t version;
 111         uint16_t age;
 112         dns_clientinfo_sourceip_t sourceip;
 113 } dns_clientinfomethods_t;
 114 #endif /* DLZ_DLOPEN_VERSION > 1 */
 115
 116 /*
 117  * Method definitions for callbacks provided by the dlopen driver
 118  */
 119
 120 typedef void log_t(int level, const char *fmt, ...);
 121
 122 typedef isc_result_t dns_sdlz_putrr_t(dns_sdlzlookup_t *lookup,
 123                                       const char *type,
 124                                       dns_ttl_t ttl,
 125                                       const char *data);
 126
 127 typedef isc_result_t dns_sdlz_putnamedrr_t(dns_sdlzallnodes_t *allnodes,
 128                                            const char *name,
 129                                            const char *type,
 130                                            dns_ttl_t ttl,
 131                                            const char *data);
 132
 133 #if DLZ_DLOPEN_VERSION < 3
 134 typedef isc_result_t dns_dlz_writeablezone_t(dns_view_t *view,
 135                                              const char *zone_name);
 136 #else /* DLZ_DLOPEN_VERSION >= 3 */
 137 typedef isc_result_t dns_dlz_writeablezone_t(dns_view_t *view,
 138                                              dns_dlzdb_t *dlzdb,
 139                                              const char *zone_name);
 140 #endif /* DLZ_DLOPEN_VERSION */
 141
 142 /*
 143  * prototypes for the functions you can include in your module
 144  */
 145
 146 /*
 147  * dlz_version() is required for all DLZ external drivers. It should
 148  * return DLZ_DLOPEN_VERSION.  'flags' is updated to indicate capabilities
 149  * of the module.  In particular, if the module is thread-safe then it
 150  * sets 'flags' to include DNS_SDLZFLAG_THREADSAFE.  Other capability
 151  * flags may be added in the future.
 152  */
 153 int
 154 dlz_version(unsigned int *flags);
 155
 156 /*
 157  * dlz_create() is required for all DLZ external drivers.
 158  */
 159 isc_result_t
 160 dlz_create(const char *dlzname, unsigned int argc, const char *argv[],
 161            void **dbdata, ...);
 162
 163 /*
 164  * dlz_destroy() is optional, and will be called when the driver is
 165  * unloaded if supplied
 166  */
 167 void
 168 dlz_destroy(void *dbdata);
 169
 170 /*
 171  * dlz_findzonedb is required for all DLZ external drivers
 172  */
 173 #if DLZ_DLOPEN_VERSION < 3
 174 isc_result_t
 175 dlz_findzonedb(void *dbdata, const char *name);
 176 #else /* DLZ_DLOPEN_VERSION >= 3 */
 177 isc_result_t
 178 dlz_findzonedb(void *dbdata, const char *name,
 179                dns_clientinfomethods_t *methods,
 180                dns_clientinfo_t *clientinfo);
 181 #endif /* DLZ_DLOPEN_VERSION */
 182
 183 /*
 184  * dlz_lookup is required for all DLZ external drivers
 185  */
 186 #if DLZ_DLOPEN_VERSION == 1
 187 isc_result_t
 188 dlz_lookup(const char *zone, const char *name, void *dbdata,
 189            dns_sdlzlookup_t *lookup);
 190 #else /* DLZ_DLOPEN_VERSION > 1 */
 191 isc_result_t
 192 dlz_lookup(const char *zone, const char *name, void *dbdata,
 193            dns_sdlzlookup_t *lookup,
 194            dns_clientinfomethods_t *methods,
 195            dns_clientinfo_t *clientinfo);
 196 #endif /* DLZ_DLOPEN_VERSION */
 197
 198 /*
 199  * dlz_authority() is optional if dlz_lookup() supplies
 200  * authority information (i.e., SOA, NS) for the dns record
 201  */
 202 isc_result_t
 203 dlz_authority(const char *zone, void *dbdata, dns_sdlzlookup_t *lookup);
 204
 205 /*
 206  * dlz_allowzonexfr() is optional, and should be supplied if you want to
 207  * support zone transfers
 208  */
 209 isc_result_t
 210 dlz_allowzonexfr(void *dbdata, const char *name, const char *client);
 211
 212 /*
 213  * dlz_allnodes() is optional, but must be supplied if supply a
 214  * dlz_allowzonexfr() function
 215  */
 216 isc_result_t
 217 dlz_allnodes(const char *zone, void *dbdata, dns_sdlzallnodes_t *allnodes);
 218
 219 /*
 220  * dlz_newversion() is optional. It should be supplied if you want to
 221  * support dynamic updates.
 222  */
 223 isc_result_t
 224 dlz_newversion(const char *zone, void *dbdata, void **versionp);
 225
 226 /*
 227  * dlz_closeversion() is optional, but must be supplied if you supply a
 228  * dlz_newversion() function
 229  */
 230 void
 231 dlz_closeversion(const char *zone, isc_boolean_t commit, void *dbdata,
 232                  void **versionp);
 233
 234 /*
 235  * dlz_configure() is optional, but must be supplied if you want to support
 236  * dynamic updates
 237  */
 238 #if DLZ_DLOPEN_VERSION < 3
 239 isc_result_t
 240 dlz_configure(dns_view_t *view, void *dbdata);
 241 #else /* DLZ_DLOPEN_VERSION >= 3 */
 242 isc_result_t
 243 dlz_configure(dns_view_t *view, dns_dlzdb_t *dlzdb, void *dbdata);
 244 #endif /* DLZ_DLOPEN_VERSION */
 245
 246 /*
 247  * dlz_ssumatch() is optional, but must be supplied if you want to support
 248  * dynamic updates
 249  */
 250 isc_boolean_t
 251 dlz_ssumatch(const char *signer, const char *name, const char *tcpaddr,
 252              const char *type, const char *key, uint32_t keydatalen,
 253              uint8_t *keydata, void *dbdata);
 254
 255 /*
 256  * dlz_addrdataset() is optional, but must be supplied if you want to
 257  * support dynamic updates
 258  */
 259 isc_result_t
 260 dlz_addrdataset(const char *name, const char *rdatastr, void *dbdata,
 261                 void *version);
 262
 263 /*
 264  * dlz_subrdataset() is optional, but must be supplied if you want to
 265  * support dynamic updates
 266  */
 267 isc_result_t
 268 dlz_subrdataset(const char *name, const char *rdatastr, void *dbdata,
 269                 void *version);
 270
 271 /*
 272  * dlz_delrdataset() is optional, but must be supplied if you want to
 273  * support dynamic updates
 274  */
 275 isc_result_t
 276 dlz_delrdataset(const char *name, const char *type, void *dbdata,
 277                 void *version);
 278
 279 #endif /* DLZ_MINIMAL_H */