2 * sql.c rlm_sql - FreeRADIUS SQL Module
3 * Main code directly taken from ICRADIUS
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 * Copyright 2001,2006 The FreeRADIUS server project
22 * Copyright 2000 Mike Machado <mike@innercite.com>
23 * Copyright 2000 Alan DeKok <aland@ox.org>
24 * Copyright 2001 Chad Miller <cmiller@surfsouth.com>
29 #include <freeradius-devel/radiusd.h>
30 #include <freeradius-devel/rad_assert.h>
43 * Translate rlm_sql rcodes to humanly
44 * readable reason strings.
46 const FR_NAME_NUMBER sql_rcode_table[] = {
47 { "success", RLM_SQL_OK },
48 { "need alt query", RLM_SQL_ALT_QUERY },
49 { "server error", RLM_SQL_ERROR },
50 { "query invalid", RLM_SQL_QUERY_INVALID },
51 { "no connection", RLM_SQL_RECONNECT },
56 void *mod_conn_create(TALLOC_CTX *ctx, void *instance)
59 rlm_sql_t *inst = instance;
60 rlm_sql_handle_t *handle;
63 * Connections cannot be alloced from the inst or
64 * pool contexts due to threading issues.
66 handle = talloc_zero(ctx, rlm_sql_handle_t);
67 if (!handle) return NULL;
69 handle->log_ctx = talloc_pool(handle, 2048);
70 if (!handle->log_ctx) {
76 * Handle requires a pointer to the SQL inst so the
77 * destructor has access to the module configuration.
81 rcode = (inst->module->sql_socket_init)(handle, inst->config);
85 * Destroy any half opened connections.
91 if (inst->config->connect_query) {
92 if (rlm_sql_select_query(inst, NULL, &handle, inst->config->connect_query) != RLM_SQL_OK) goto fail;
93 (inst->module->sql_finish_select_query)(handle, inst->config);
99 /*************************************************************************
101 * Function: sql_fr_pair_list_afrom_str
103 * Purpose: Read entries from the database and fill VALUE_PAIR structures
105 *************************************************************************/
106 int sql_fr_pair_list_afrom_str(TALLOC_CTX *ctx, REQUEST *request, VALUE_PAIR **head, rlm_sql_row_t row)
109 char const *ptr, *value;
110 char buf[MAX_STRING_LEN];
112 FR_TOKEN token, op = T_EOL;
115 * Verify the 'Attribute' field
117 if (!row[2] || row[2][0] == '\0') {
118 REDEBUG("The 'Attribute' field is empty or NULL, skipping the entire row");
123 * Verify the 'op' field
125 if (row[4] != NULL && row[4][0] != '\0') {
127 op = gettoken(&ptr, buf, sizeof(buf), false);
128 if (!fr_assignment_op[op] && !fr_equality_op[op]) {
129 REDEBUG("Invalid op \"%s\" for attribute %s", row[4], row[2]);
135 * Complain about empty or invalid 'op' field
138 REDEBUG("The 'op' field for attribute '%s = %s' is NULL, or non-existent.", row[2], row[3]);
139 REDEBUG("You MUST FIX THIS if you want the configuration to behave as you expect");
143 * The 'Value' field may be empty or NULL
147 * If we have a new-style quoted string, where the
148 * *entire* string is quoted, do xlat's.
150 if (row[3] != NULL &&
151 ((row[3][0] == '\'') || (row[3][0] == '`') || (row[3][0] == '"')) &&
152 (row[3][0] == row[3][strlen(row[3])-1])) {
154 token = gettoken(&value, buf, sizeof(buf), false);
157 * Take the unquoted string.
159 case T_SINGLE_QUOTED_STRING:
160 case T_DOUBLE_QUOTED_STRING:
165 * Mark the pair to be allocated later.
167 case T_BACK_QUOTED_STRING:
173 * Keep the original string.
184 vp = fr_pair_make(ctx, NULL, row[2], NULL, op);
186 REDEBUG("Failed to create the pair: %s", fr_strerror());
191 if (fr_pair_mark_xlat(vp, value) < 0) {
192 REDEBUG("Error marking pair for xlat");
198 if (fr_pair_value_from_str(vp, value, -1) < 0) {
199 REDEBUG("Error parsing value: %s", fr_strerror());
207 * Add the pair into the packet
209 fr_pair_add(head, vp);
213 /** Call the driver's sql_fetch_row function
215 * Calls the driver's sql_fetch_row logging any errors. On success, will
216 * write row data to (*handle)->row.
218 * @param inst Instance of rlm_sql.
219 * @param request The Current request, may be NULL.
220 * @param handle Handle to retrieve errors for.
221 * @return on success RLM_SQL_OK, other sql_rcode_t constants on error.
223 sql_rcode_t rlm_sql_fetch_row(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle)
227 if (!*handle || !(*handle)->conn) return RLM_SQL_ERROR;
230 * We can't implement reconnect logic here, because the caller
231 * may require the original connection to free up queries or
232 * result sets associated with that connection.
234 ret = (inst->module->sql_fetch_row)(*handle, inst->config);
236 MOD_ROPTIONAL(RERROR, ERROR, "Error fetching row");
238 rlm_sql_print_error(inst, request, *handle, false);
244 /** Retrieve any errors from the SQL driver
246 * Retrieves errors from the driver from the last operation and writes them to
247 * to request/global log, in the ERROR, WARN, INFO and DEBUG categories.
249 * @param inst Instance of rlm_sql.
250 * @param request Current request, may be NULL.
251 * @param handle Handle to retrieve errors for.
252 * @param force_debug Force all errors to be logged as debug messages.
254 void rlm_sql_print_error(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t *handle, bool force_debug)
257 sql_log_entry_t log[20];
260 num = (inst->module->sql_error)(handle->log_ctx, log, (sizeof(log) / sizeof(*log)), handle, inst->config);
262 MOD_ROPTIONAL(RERROR, ERROR, "Unknown error");
266 driver = inst->config->sql_driver_name;
268 for (i = 0; i < num; i++) {
269 if (force_debug) goto debug;
271 switch (log[i].type) {
273 MOD_ROPTIONAL(RERROR, ERROR, "%s: %s", driver, log[i].msg);
277 MOD_ROPTIONAL(RWARN, WARN, "%s: %s", driver, log[i].msg);
281 MOD_ROPTIONAL(RINFO, INFO, "%s: %s", driver, log[i].msg);
287 MOD_ROPTIONAL(RDEBUG, DEBUG, "%s: %s", driver, log[i].msg);
292 talloc_free_children(handle->log_ctx);
295 /** Call the driver's sql_query method, reconnecting if necessary.
297 * @note Caller must call (inst->module->sql_finish_query)(handle, inst->config);
298 * after they're done with the result.
300 * @param handle to query the database with. *handle should not be NULL, as this indicates
301 * previous reconnection attempt has failed.
302 * @param request Current request.
303 * @param inst rlm_sql instance data.
304 * @param query to execute. Should not be zero length.
305 * @return RLM_SQL_OK on success, RLM_SQL_RECONNECT if a new handle is required
306 * (also sets *handle = NULL), RLM_SQL_QUERY_INVALID/RLM_SQL_ERROR on invalid query or
307 * connection error, RLM_SQL_ALT_QUERY on constraints violation.
309 sql_rcode_t rlm_sql_query(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle, char const *query)
311 int ret = RLM_SQL_ERROR;
314 /* Caller should check they have a valid handle */
317 /* There's no query to run, return an error */
318 if (query[0] == '\0') {
319 if (request) REDEBUG("Zero length query");
320 return RLM_SQL_QUERY_INVALID;
324 * inst->pool may be NULL is this function is called by mod_conn_create.
326 count = inst->pool ? fr_connection_pool_get_num(inst->pool) : 0;
329 * Here we try with each of the existing connections, then try to create
330 * a new connection, then give up.
332 for (i = 0; i < (count + 1); i++) {
333 MOD_ROPTIONAL(RDEBUG2, DEBUG2, "Executing query: %s", query);
335 ret = (inst->module->sql_query)(*handle, inst->config, query);
341 * Run through all available sockets until we exhaust all existing
342 * sockets in the pool and fail to establish a *new* connection.
344 case RLM_SQL_RECONNECT:
345 *handle = fr_connection_reconnect(inst->pool, *handle);
346 /* Reconnection failed */
347 if (!*handle) return RLM_SQL_RECONNECT;
348 /* Reconnection succeeded, try again with the new handle */
352 * These are bad and should make rlm_sql return invalid
354 case RLM_SQL_QUERY_INVALID:
355 rlm_sql_print_error(inst, request, *handle, false);
356 (inst->module->sql_finish_query)(*handle, inst->config);
360 * Server or client errors.
362 * If the driver claims to be able to distinguish between
363 * duplicate row errors and other errors, and we hit a
364 * general error treat it as a failure.
366 * Otherwise rewrite it to RLM_SQL_ALT_QUERY.
369 if (inst->module->flags & RLM_SQL_RCODE_FLAGS_ALT_QUERY) {
370 rlm_sql_print_error(inst, request, *handle, false);
371 (inst->module->sql_finish_query)(*handle, inst->config);
374 ret = RLM_SQL_ALT_QUERY;
378 * Driver suggested using an alternative query
380 case RLM_SQL_ALT_QUERY:
381 rlm_sql_print_error(inst, request, *handle, true);
382 (inst->module->sql_finish_query)(*handle, inst->config);
390 MOD_ROPTIONAL(RERROR, ERROR, "Hit reconnection limit");
392 return RLM_SQL_ERROR;
395 /** Call the driver's sql_select_query method, reconnecting if necessary.
397 * @note Caller must call (inst->module->sql_finish_select_query)(handle, inst->config);
398 * after they're done with the result.
400 * @param inst rlm_sql instance data.
401 * @param request Current request.
402 * @param handle to query the database with. *handle should not be NULL, as this indicates
403 * previous reconnection attempt has failed.
404 * @param query to execute. Should not be zero length.
405 * @return RLM_SQL_OK on success, RLM_SQL_RECONNECT if a new handle is required (also sets *handle = NULL),
406 * RLM_SQL_QUERY_INVALID/RLM_SQL_ERROR on invalid query or connection error.
408 sql_rcode_t rlm_sql_select_query(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle, char const *query)
410 int ret = RLM_SQL_ERROR;
413 /* Caller should check they have a valid handle */
416 /* There's no query to run, return an error */
417 if (query[0] == '\0') {
418 if (request) REDEBUG("Zero length query");
420 return RLM_SQL_QUERY_INVALID;
424 * inst->pool may be NULL is this function is called by mod_conn_create.
426 count = inst->pool ? fr_connection_pool_get_num(inst->pool) : 0;
429 * For sanity, for when no connections are viable, and we can't make a new one
431 for (i = 0; i < (count + 1); i++) {
432 MOD_ROPTIONAL(RDEBUG2, DEBUG2, "Executing select query: %s", query);
434 ret = (inst->module->sql_select_query)(*handle, inst->config, query);
440 * Run through all available sockets until we exhaust all existing
441 * sockets in the pool and fail to establish a *new* connection.
443 case RLM_SQL_RECONNECT:
444 *handle = fr_connection_reconnect(inst->pool, *handle);
445 /* Reconnection failed */
446 if (!*handle) return RLM_SQL_RECONNECT;
447 /* Reconnection succeeded, try again with the new handle */
450 case RLM_SQL_QUERY_INVALID:
453 rlm_sql_print_error(inst, request, *handle, false);
454 (inst->module->sql_finish_select_query)(*handle, inst->config);
461 MOD_ROPTIONAL(RERROR, ERROR, "Hit reconnection limit");
463 return RLM_SQL_ERROR;
467 /*************************************************************************
469 * Function: sql_getvpdata
471 * Purpose: Get any group check or reply pairs
473 *************************************************************************/
474 int sql_getvpdata(TALLOC_CTX *ctx, rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle,
475 VALUE_PAIR **pair, char const *query)
483 rcode = rlm_sql_select_query(inst, request, handle, query);
484 if (rcode != RLM_SQL_OK) return -1; /* error handled by rlm_sql_select_query */
486 while (rlm_sql_fetch_row(inst, request, handle) == 0) {
487 row = (*handle)->row;
489 if (sql_fr_pair_list_afrom_str(ctx, request, pair, row) != 0) {
490 REDEBUG("Error parsing user data from database result");
492 (inst->module->sql_finish_select_query)(*handle, inst->config);
498 (inst->module->sql_finish_select_query)(*handle, inst->config);
504 * Log the query to a file.
506 void rlm_sql_query_log(rlm_sql_t *inst, REQUEST *request,
507 sql_acct_section_t *section, char const *query)
510 char const *filename = NULL;
511 char *expanded = NULL;
513 bool failed = false; /* Write the log message outside of the critical region */
515 filename = inst->config->logfile;
516 if (section && section->logfile) filename = section->logfile;
518 if (!filename || !*filename) {
522 if (radius_axlat(&expanded, request, filename, NULL, NULL) < 0) {
526 fd = exfile_open(inst->ef, filename, 0640, true);
528 ERROR("rlm_sql (%s): Couldn't open logfile '%s': %s", inst->name,
529 expanded, fr_syserror(errno));
531 talloc_free(expanded);
536 if ((write(fd, query, len) < 0) || (write(fd, ";\n", 2) < 0)) {
541 ERROR("rlm_sql (%s): Failed writing to logfile '%s': %s", inst->name, expanded,
545 talloc_free(expanded);
546 exfile_close(inst->ef, fd);